KILROY REALTY CORP
S-11, 1996-11-05
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<PAGE>
 
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON NOVEMBER 5, 1996
 
                                                       REGISTRATION NO. 333-
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
 
                               ----------------
 
                                   FORM S-11
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933
 
                               ----------------
 
                           KILROY REALTY CORPORATION
     (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS GOVERNING INSTRUMENTS)
 
                          2250 EAST IMPERIAL HIGHWAY
                         EL SEGUNDO, CALIFORNIA 90245
         (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES, INCLUDING ZIP CODE)
 
                               ----------------
 
                              JOHN B. KILROY, JR.
                     PRESIDENT AND CHIEF EXECUTIVE OFFICER
                           KILROY REALTY CORPORATION
                          2250 EAST IMPERIAL HIGHWAY
                         EL SEGUNDO, CALIFORNIA 90245
                    (NAME AND ADDRESS OF AGENT FOR SERVICE)
 
                               ----------------
 
                                  COPIES TO:
 
    EDWARD SONNENSCHEIN, JR., ESQ.             LYNN TOBY FISHER, ESQ.
           LATHAM & WATKINS                KAYE, SCHOLER, FIERMAN, HAYS &
         633 WEST FIFTH STREET                      HANDLER, LLP
     LOS ANGELES, CALIFORNIA 90071                 425 PARK AVENUE
            (213) 485-1234                    NEW YORK, NEW YORK 10022
                                                   (212) 836-8000
 
                               ----------------
 
  APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after the effective date of this Registration Statement.
 
  If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following
box and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [_]
 
  If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [_]
 
  If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [_]
 
                               ----------------
 
                        CALCULATION OF REGISTRATION FEE
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                             PROPOSED MAXIMUM
                                            AGGREGATE OFFERING    AMOUNT OF
   TITLE OF SECURITIES BEING REGISTERED         PRICE (1)      REGISTRATION FEE
- -------------------------------------------------------------------------------
<S>                                         <C>                <C>
Common Stock, par value $.01 per share....     $212,980,000        $64,539
- -------------------------------------------------------------------------------
</TABLE>
- -------------------------------------------------------------------------------
(1) Estimated solely for the purpose of calculating the registration fee
    pursuant to Rule 457(o) of the Securities Act of 1933.
 
                               ----------------
 
  THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS
REGISTRATION STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH
SECTION 8(a) OF THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT
SHALL BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID
SECTION 8(a), MAY DETERMINE.
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>
 
                             CROSS REFERENCE SHEET
 
<TABLE>
<CAPTION>
       FORM S-11 ITEM NO. AND HEADING             LOCATION OR HEADING IN PROSPECTUS
       ------------------------------             ---------------------------------
 <C>                                         <S>
  1. Forepart of Registration Statement and
     Outside  Front Cover Page of Prospec-
     tus.................................... Outside Front Cover Page
  2. Inside Front and Outside Back Cover     Inside Front Cover Page; Outside Back Cover
     Pages of  Prospectus...................  Page
  3. Summary Information, Risk Factors and
     Ratio  of Earnings to Fixed Charges.... Prospectus Summary; Risk Factors; Distribu-
                                              tion
                                              Policy; Business and Properties; Certain
                                              Relationships and Related Transactions
  4. Determination of Offering Price........ Underwriting
  5. Dilution............................... Dilution
  6. Selling Security Holders............... Not applicable
  7. Plan of Distribution................... Underwriting
  8. Use of Proceeds........................ Use of Proceeds
  9. Selected Financial Data................ Selected Financial Data
 10. Management's Discussion and Analysis of
      Financial Condition and Results of
      Operations............................ Management's Discussion and Analysis of Fi-
                                              nancial Condition and Results of Opera-
                                              tions
 11. General Information as to Registrant... Prospectus Summary; Business and Proper-
                                              ties;
                                              Management; Principal Stockholders; Cer-
                                              tain
                                              Provisions of Maryland Law and of the
                                              Company's Articles of Incorporation and
                                              Bylaws
 12. Policy with Respect to Certain Activi-
     ties................................... Policies With Respect to Certain Activities
 13. Investment Policies of Registrant...... Policies With Respect to Certain Activities
 14. Description of Real Estate............. Management's Discussion and Analysis of Fi-
                                              nancial Condition and Results of Opera-
                                              tions; Business and Properties
 15. Operating Data......................... Business and Properties
 16.Tax Treatment of Registrant and Its
      Security-Holders...................... Federal Income Tax Consequences
 17.Market Price of and Dividends on the
      Registrant's Common Equity and Related
      Stockholder Matters................... Risk Factors; Principal Stockholders; Dis-
                                              tribution Policy; Shares Available for Fu-
                                              ture Sale
 18. Description of Registrant's Securi-     Description of Capital Stock; Certain Pro-
     ties...................................  visions of Maryland Law and of the
                                              Company's Articles of Incorporation and
                                              Bylaws
 19. Legal Proceedings...................... Business and Properties--Legal Proceedings
 20.Security Ownership of Certain Beneficial
      Owners and Management................. Principal Stockholders
 21. Directors and Executive Officers....... Management
 22. Executive Compensation................. Management
 23. Certain Relationships and Related       Risk Factors; Business and Properties; Man-
     Transactions...........................  agement; Certain Relationships and Related
                                              Transactions; Principal Stockholders
</TABLE>
<PAGE>
 
 
<TABLE>
<CAPTION>
       FORM S-11 ITEM NO. AND HEADING             LOCATION OR HEADING IN PROSPECTUS
       ------------------------------             ---------------------------------
 <C>                                         <S>
 24.Selection, Management and Custody of
      Registrant's Investments.............. Risk Factors; Business and Properties; Pol-
                                              icies With Respect to Certain Activities
 25. Policies with Respect to Certain Trans- Risk Factors; Business and Properties; Pol-
     actions................................  icies With Respect to Certain Activities;
                                              Management;
                                              Certain Relationships and Related Transac-
                                              tions; Principal Stockholders
 26. Limitations of Liability............... Management; Certain Provisions of Maryland
                                              Law and of the Company's Articles of In-
                                              corporation and Bylaws
 27. Financial Statements and Information... Index to Financial Statements
 28. Interests of Named Experts and Coun-
     sel.................................... Not Applicable
 29.Disclosure of Commission Position on
      Indemnification for Securities Act
      Liabilities........................... Not Applicable
</TABLE>
<PAGE>
 
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A         +
+REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE   +
+SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY  +
+OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT        +
+BECOMES EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO SELL OR   +
+THE SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BY ANY SALE OF THESE      +
+SECURITIES IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE    +
+UNLAWFUL PRIOR TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF  +
+ANY SUCH STATE.                                                               +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
                     SUBJECT TO COMPLETION--DATED    , 1996
PROSPECTUS
- --------------------------------------------------------------------------------
                                9,260,000 Shares
[LOGO]                     KILROY REALTY CORPORATION
                                  Common Stock
- --------------------------------------------------------------------------------
Kilroy Realty Corporation (the "Company") has been formed to succeed to the
business of Kilroy Industries and its affiliates consisting principally of a
portfolio of Class A suburban office and industrial buildings in prime
locations, primarily in Southern California, and the affiliated real estate
ownership, acquisition, development, leasing and management businesses which
were established in Southern California in 1947. Upon the consummation of this
offering (the "Offering") and a series of related transactions (the "Formation
Transactions"), the Company will own ten suburban office buildings (the "Office
Properties"), all of which are located in Southern California, encompassing an
aggregate of approximately 1.5 million rentable square feet and nine industrial
properties (the "Industrial Properties") encompassing an aggregate of
approximately 900,000 rentable square feet. As of June 30, 1996, the Office
Properties were approximately 94.1% leased to 88 tenants and the Industrial
Properties were approximately 98.4% leased to nine tenants. The Company will
also have exclusive rights to develop an aggregate of approximately 24 acres of
land in strategic Southern California submarkets presently entitled for over
900,000 net rentable square feet. See "Business and Properties--Development,
Leasing and Management Activities." The Office Properties, the Industrial
Properties, and all of the other real estate assets and contract rights are
hereinafter collectively referred to as the "Properties." The Company will
operate as a self-administered and self-managed real estate investment trust (a
"REIT"). The Company intends to make regular quarterly distributions to its
stockholders beginning with a distribution for the period ending    , 1997.
 
All of the shares of common stock of the Company, par value $.01 per share (the
"Common Stock"), offered hereby are being sold by the Company and will
represent approximately 84.8% of all shares of Common Stock (or interests
exchangeable therefor) outstanding after consummation of the Offering. Upon
consummation of the Offering, the Company's officers and directors (and certain
of their affiliates) will own in the aggregate 15.2% of the Common Stock or
interests exchangeable therefor. See "Principal Stockholders." To assist the
Company in maintaining its qualification as a REIT for federal income tax
purposes, ownership by any person generally is limited to 8.0% of the then
outstanding Common Stock, which can be waived by the Board of Directors.
 
Prior to the Offering, there has been no public market for the Common Stock of
the Company. It is currently anticipated that the initial public offering price
will be between $19.00 and $21.00 per share. See "Underwriting" for a
discussion of the factors to be considered in determining the initial public
offering price. The shares of Common Stock offered hereby have been approved
for listing on the New York Stock Exchange (the "NYSE") under the symbol "KRC,"
subject to official notice of issuance.
 
See "Risk Factors" on pages 18 to 32 for a discussion of certain material
factors which should be considered in connection with an investment in the
Common Stock offered hereby, including:
 
 . Dependence on demand for office, industrial and retail space in the Southern
   California market, thereby increasing the risk that the Company will be
   materially adversely affected by general economic conditions in a single
   market.
 . Dependence on certain significant tenants, particularly Hughes Electronic
   Corporation's Space & Communications Company.
 . A portion of the Company's anticipated cash flow may be generated from
   development activities which are partially dependent on the availability of
   development opportunities, and which are subject to the risks inherent with
   development.
 . The distribution requirements of REITs may limit the Company's ability to
   finance future developments, acquisitions and expansions without additional
   debt or equity financing.
 . The valuation of the Properties was not based on third-party appraisals, and
   the consideration to be paid by the Company for the Properties may exceed
   their aggregate fair market value.
 . Real estate investment considerations, including the effect of economic and
   other conditions on real estate values and the ability of the Company's
   properties to generate sufficient cash flow to meet operating expenses,
   including debt service.
 . Risks associated with debt financing, including the potential inability to
   refinance indebtedness upon maturity, and the fact that the Company's
   organizational documents do not limit the amount of indebtedness that the
   Company may incur.
 . Conflicts of interest with, and material benefits to, affiliates of the
   Company in connection with the Formation Transactions (as defined),
   consummation of the Offering and the operation of the Company's ongoing
   businesses, including conflicts associated with the tax consequences of
   sales and refinancings of the Properties.
 . Taxation of the Company as a corporation if it fails to qualify as a REIT
   for federal income tax purposes, the taxation of the Operating Partnership
   (as defined) as a corporation if it fails to qualify as a partnership for
   federal income tax purposes and the resulting decreases in cash available
   for distribution.
 . Risk that the Company's Board of Directors may in the future alter its
   investment policies without the consent of stockholders.
 . Limitations on stockholders' ability to effect a change of control of the
   Company, including the restriction of ownership of shares of Common Stock by
   any person (with certain exceptions) to 8.0% of the outstanding shares.
- --------------------------------------------------------------------------------
  THESE SECURITIES  HAVE NOT BEEN  APPROVED OR DISAPPROVED BY  THE SECURITIES
    AND EXCHANGE COMMISSION OR ANY  STATE SECURITIES COMMISSION NOR HAS THE
       SECURITIES  AND  EXCHANGE  COMMISSION  OR  ANY  STATE  SECURITIES
         COMMISSION  PASSED  UPON THE  ACCURACY  OR  ADEQUACY OF  THIS
            PROSPECTUS. ANY  REPRESENTATION  TO THE  CONTRARY  IS  A
              CRIMINAL OFFENSE.
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                               Underwriting
                             Price to          Discounts and        Proceeds to
                              Public          Commissions(1)        Company(2)
- -------------------------------------------------------------------------------
<S>                     <C>                 <C>                 <C>
Per Share.............         $                   $                   $
- -------------------------------------------------------------------------------
Total(3)..............        $                   $                   $
</TABLE>
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
(1) The Company has agreed to indemnify the several Underwriters against
    certain liabilities, including liabilities under the Securities Act of
    1933. See "Underwriting."
(2) Before deducting expenses of the Offering payable by the Company estimated
    at $   .
(3) The Company has granted the several Underwriters a 30-day over-allotment
    option to purchase up to 1,389,000 additional shares of Common Stock on the
    same terms and conditions as set forth above. If all such additional shares
    are purchased by the Underwriters, the total Price to Public will be $   ,
    the total Underwriting Discounts and Commissions will be $    and the total
    Proceeds to Company will be $   . See "Underwriting."
- --------------------------------------------------------------------------------
The shares of Common Stock are offered by the several Underwriters subject to
delivery by the Company and acceptance by the Underwriters, to prior sale and
to withdrawal, cancellation or modification of the offer without notice.
Delivery of the shares to the Underwriters is expected to be made at the office
of Prudential Securities Incorporated, One New York Plaza, New York, New York,
on or about    , 1996.
 
PRUDENTIAL SECURITIES INCORPORATED
            DONALDSON, LUFKIN & JENRETTE
                 SECURITIES CORPORATION
                              J.P. MORGAN & CO.
   , 1996                                                      SMITH BARNEY INC.
<PAGE>
 
  IN CONNECTION WITH THIS OFFERING, THE UNDERWRITERS MAY OVERALLOT OR EFFECT
TRANSACTIONS WHICH STABILIZE OR MAINTAIN THE MARKET PRICE OF THE COMMON STOCK
AT A LEVEL ABOVE THAT WHICH MIGHT OTHERWISE PREVAIL IN THE OPEN MARKET. SUCH
TRANSACTIONS MAY BE EFFECTED ON THE NEW YORK STOCK EXCHANGE, IN THE OVER-THE-
COUNTER MARKET OR OTHERWISE. SUCH STABILIZING, IF COMMENCED, MAY BE
DISCONTINUED AT ANY TIME.
 
  THE ATTORNEY GENERAL OF THE STATE OF NEW YORK HAS NOT PASSED ON OR ENDORSED
THE MERITS OF THIS OFFERING. ANY REPRESENTATION TO THE CONTRARY IS UNLAWFUL.
 
                          FORWARD LOOKING STATEMENTS
 
  THIS PROSPECTUS CONTAINS CERTAIN FORWARD LOOKING STATEMENTS WITHIN THE
MEANING OF SECTION 27A OF THE SECURITIES ACT OF 1933 AND SECTION 21E OF THE
SECURITIES EXCHANGE ACT OF 1934. ACTUAL RESULTS COULD DIFFER MATERIALLY FROM
THOSE PROJECTED IN THE FORWARD LOOKING STATEMENTS AS A RESULT OF CERTAIN
UNCERTAINTIES SET FORTH BELOW AND ELSEWHERE IN THIS PROSPECTUS.
 
  THE FORWARD LOOKING STATEMENTS INCLUDED IN THIS PROSPECTUS UNDER THE
CAPTIONS "PROSPECTUS SUMMARY," "THE COMPANY," "DISTRIBUTION POLICY,"
"MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
OPERATIONS," AND "BUSINESS AND PROPERTIES," SUCH AS THOSE CONCERNING, AMONG
OTHER THINGS, FUTURE RESULTS OF OPERATIONS, CASH AVAILABLE FOR DISTRIBUTION,
LEASE RENEWALS, INCREASES IN BASE RENT, FEE DEVELOPMENT ACTIVITIES, SOURCES OF
GROWTH, ECONOMIC CONDITIONS AND TRENDS, PROPERTY ACQUISITIONS AND PLANNED
DEVELOPMENT AND EXPANSION OF OWNED OR LEASED PROPERTY ARE PROJECTIONS AND ARE
NECESSARILY SUBJECT TO VARIOUS RISKS AND UNCERTAINTIES. ACTUAL OUTCOMES ARE
DEPENDENT UPON THE COMPANY'S SUCCESSFUL PERFORMANCE OF INTERNAL PLANS,
ECONOMIC CONDITIONS IN THE SUBMARKETS IN WHICH THE COMPANY'S PROPERTIES ARE
LOCATED SUCH AS OVERSUPPLY OF OFFICE, INDUSTRIAL OR RETAIL SPACE OR A
REDUCTION IN THE DEMAND FOR SUCH SPACE, SUCCESSFUL COMPLETION OF PLANNED
DEVELOPMENT, THE AVAILABILITY OF DEVELOPMENT OPPORTUNITIES, THE AVAILABILITY
OF ACQUISITION AND DEVELOPMENT FINANCING, COMPLIANCE WITH APPLICABLE LAWS AND
REGULATIONS AND THE SUCCESSFUL MANAGEMENT OF OTHER ECONOMIC, LEGAL, FINANCIAL
AND GOVERNMENTAL RISKS AND UNCERTAINTIES.
<PAGE>
 
                               TABLE OF CONTENTS
<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
PROSPECTUS SUMMARY........................................................    1
The Company...............................................................    1
Risk Factors..............................................................    3
Growth Strategies.........................................................    5
The Office and Industrial Properties......................................    9
The Company's Southern California Submarkets..............................   11
The Financing.............................................................   11
Formation and Structure of the Company....................................   12
Distribution Policy.......................................................   14
Tax Status of the Company.................................................   15
The Offering..............................................................   15
Summary Financial Data....................................................   16
RISK FACTORS..............................................................   18
Dependence on Southern California Market..................................   18
Dependence on Significant Tenants.........................................   18
Cash Flow from Development Activities.....................................   18
Distributions to Stockholders.............................................   18
No Appraisals; Consideration to be Paid for Properties and Other Assets
 May Exceed their Fair Market Value.......................................   19
Real Estate Investment Considerations.....................................   20
Real Estate Financing Risks...............................................   22
Conflicts of Interest.....................................................   22
Adverse Consequences of Failure to Qualify as a REIT......................   24
Adverse Consequences of Failure of the Operating Partnership to Qualify as
 a Partnership for Federal Income Tax Purposes............................   24
Changes in Investment and Financing Policies Without Stockholder Vote.....   25
Limits on Ownership and Change in Control.................................   26
Risks of Development Business and Related Activities Being Conducted by
 the Services Company; Control of the Services Company....................   28
Dependence on Key Personnel...............................................   28
Distribution Payout Percentage............................................   28
Historical Operating Losses of the Office and Industrial Properties.......   28
No Limitation on Debt.....................................................   29
Government Regulations....................................................   29
Immediate and Substantial Dilution........................................   31
No Prior Public Market....................................................   31
Effect of Market Interest Rates on Price of Common Stock..................   31
Shares Available for Future Sale..........................................   31
THE COMPANY...............................................................   33
</TABLE>
<TABLE>
<CAPTION>
                                                                          PAGE
                                                                          ----
<S>                                                                       <C>
General..................................................................  33
Growth Strategies........................................................  35
USE OF PROCEEDS..........................................................  39
DISTRIBUTION POLICY......................................................  41
CAPITALIZATION...........................................................  46
DILUTION.................................................................  47
SELECTED FINANCIAL DATA..................................................  48
MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
 OF OPERATIONS...........................................................  50
Results of Operations....................................................  50
Liquidity and Capital Resources..........................................  52
Historical Cash Flows....................................................  53
Funds from Operations....................................................  53
Inflation................................................................  53
BUSINESS AND PROPERTIES..................................................  54
General..................................................................  54
Occupancy and Rental Information.........................................  58
Lease Expirations........................................................  59
Tenant Information.......................................................  60
Office Properties........................................................  61
Industrial Properties....................................................  67
Development, Leasing and Management Activities...........................  68
Acquisition Properties...................................................  70
The Company's Southern California Submarkets.............................  71
Excluded Properties......................................................  84
Insurance................................................................  86
Uninsured Losses from Seismic Activity...................................  86
Government Regulations...................................................  87
Management and Employees.................................................  88
Legal Proceedings........................................................  88
POLICIES WITH RESPECT TO CERTAIN ACTIVITIES..............................  89
Investment Policies......................................................  89
Dispositions.............................................................  90
Financing................................................................  90
Working Capital Reserves.................................................  91
Conflict of Interest Policies............................................  91
Other Policies...........................................................  92
THE FINANCING............................................................  94
The Mortgage Loan........................................................  94
The Credit Facility......................................................  94
MANAGEMENT...............................................................  95
Directors and Executive Officers.........................................  95
Committees of the Board of Directors.....................................  96
Compensation of Directors................................................  96
Executive Compensation...................................................  97
</TABLE>
 
                                       i
<PAGE>
 
                         TABLE OF CONTENTS--(CONTINUED)
<TABLE>
<CAPTION>
                                                                           PAGE
                                                                           ----
<S>                                                                        <C>
Employment Agreements....................................................   97
Stock Incentive Plan.....................................................   97
Section 401(k) Plan......................................................   98
Indemnification..........................................................   99
FORMATION AND STRUCTURE OF THE COMPANY...................................  100
Formation Transactions...................................................  100
Reasons for the Reorganization of the Company............................  101
Comparison of Common Stock and Units.....................................  103
Advantages and Disadvantages of the Formation Transactions to
 Unaffiliated Stockholders...............................................  103
Benefits of the Formation Transactions to the Continuing Investors.......  104
Allocation of Consideration in the Formation Transactions................  104
CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS...........................  105
Partnership Agreement....................................................  105
Assignment of Lease; Various Services Provided by the Services Company to
 the Kilroy Group........................................................  105
Benefits of the Formation Transactions to Certain Executive Officers.....  105
PRINCIPAL STOCKHOLDERS...................................................  106
DESCRIPTION OF CAPITAL STOCK.............................................  107
General..................................................................  107
Common Stock.............................................................  107
Transfer Agent and Registrar.............................................  108
Preferred Stock..........................................................  108
Restrictions on Ownership and Transfer...................................  108
CERTAIN PROVISIONS OF MARYLAND LAW AND OF THE COMPANY'S ARTICLES OF
 INCORPORATION AND BYLAWS................................................  110
Board of Directors.......................................................  110
Removal of Directors.....................................................  111
Business Combinations....................................................  111
Control Share Acquisitions...............................................  112
Amendment to the Articles of Incorporation and Bylaws....................  113
Meetings of Stockholders.................................................  113
Advance Notice of Director Nominations and New Business..................  113
Dissolution of the Company...............................................  113
Limitation of Directors' and Officers' Liability.........................  113
</TABLE>
<TABLE>
<CAPTION>
                                                                          PAGE
                                                                          ----
<S>                                                                       <C>
Indemnification Agreements............................................... 114
PARTNERSHIP AGREEMENT OF THE OPERATING PARTNERSHIP....................... 115
Management............................................................... 115
Indemnification.......................................................... 115
Transferability of Interests............................................. 115
Issuance of Additional Units............................................. 116
Capital Contribution..................................................... 116
Awards Under Stock Incentive Plan........................................ 117
Redemption/Exchange Rights............................................... 117
Registration Rights...................................................... 117
Tax Matters.............................................................. 117
Operations............................................................... 118
Duties and Conflicts..................................................... 118
Certain Limited Partner Approval Rights.................................. 118
Term..................................................................... 118
SHARES AVAILABLE FOR FUTURE SALE......................................... 119
General.................................................................. 119
Redemption/Exchange Rights/Registration Rights........................... 120
Reinvestment and Share Purchase Plan..................................... 120
FEDERAL INCOME TAX CONSEQUENCES.......................................... 121
Taxation of the Company.................................................. 121
Failure to Qualify....................................................... 126
Taxation of Taxable U.S. Stockholders Generally.......................... 127
Backup Withholding....................................................... 127
Taxation of Tax-Exempt Stockholders...................................... 128
Taxation of Non-U.S. Stockholders........................................ 128
Tax Aspects of the Operating Partnership................................. 131
Services Company......................................................... 133
Other Tax Consequences................................................... 134
ERISA CONSIDERATIONS..................................................... 135
Employee Benefit Plans, Tax-Qualified Retirement Plans and IRAs ......... 135
Status of the Company, the Operating Partnership and the Partnerships
 Under ERISA............................................................. 135
UNDERWRITING............................................................. 137
LEGAL MATTERS............................................................ 138
EXPERTS.................................................................. 138
ADDITIONAL INFORMATION................................................... 139
GLOSSARY................................................................. 140
INDEX TO FINANCIAL STATEMENTS............................................ F-1
</TABLE>
 
                                       ii
<PAGE>
 
 
                               PROSPECTUS SUMMARY
 
  The following summary is qualified in its entirety by the more detailed
information and financial data, including the financial statements and notes
thereto, set forth elsewhere in this Prospectus. Unless otherwise indicated,
all calculations and information contained in this Prospectus assume (i) an
initial public offering price of $20 per share of Common Stock (representing
the midpoint of the range set forth on the cover page of this Prospectus),
(ii) that the Underwriters' over-allotment option will not be exercised and
(iii) the consummation of the Formation Transactions described under the
heading "Formation and Structure of the Company," including consummation of the
financings described under the heading "The Financing" and the acquisition of
certain properties described under the heading "Business and Properties--
Acquisition Properties" and give pro forma effect thereto as if such
transactions had each occurred on January 1, 1995. In addition, unless
otherwise indicated, all calculations and information contained in this
Prospectus, other than the historical and pro forma financial statements and
the respective notes thereto, give pro forma effect to the recent extension of
the tenant lease with Hughes Electronic Corporation's Space & Communications
Company with respect to space leased in the Office Property located at 2250 E.
Imperial Highway, and a portion of the space leased in the Office Property
located at 2240 E. Imperial Highway as if such lease renewal had occurred on
January 1, 1995. Unless the context otherwise requires, (i) the "Company" shall
include Kilroy Realty Corporation ("Kilroy Realty") and its subsidiaries,
including Kilroy Realty, L.P. (the "Operating Partnership") and Kilroy
Services, Inc. (the "Services Company"), and with respect to the period prior
to the Offering, the Kilroy Group (as defined below), and its predecessors,
(ii) the "Kilroy Group" shall mean, collectively, Kilroy Industries, a
California corporation ("KI"), and certain of its affiliated corporations,
partnerships and trusts that prior to the Offering owned the Properties
(collectively, the "Partnerships") and (iii) the "Continuing Investors" shall
mean the persons and entities which beneficially own interests in the
Partnerships or in the Properties and will receive limited partnership
interests ("Units") in the Operating Partnership in connection with the
Formation Transactions. Additional capitalized terms shall have the meanings
set forth in the Glossary.
 
                                  THE COMPANY
 
  The Company is a fully integrated REIT that has been formed to succeed to the
business of the Kilroy Group, consisting principally of a portfolio of Class A
suburban office and industrial buildings in prime locations, primarily in
Southern California, and the Kilroy Group's real estate ownership, acquisition,
development, leasing and management businesses which were established in
Southern California in 1947. Upon the consummation of the Offering and the
Formation Transactions, the Company (through the Operating Partnership) will
own ten Office Properties encompassing an aggregate of approximately 1.5
million rentable square feet and nine Industrial Properties encompassing an
aggregate of approximately 900,000 rentable square feet. All of the Office
Properties and eight of the Industrial Properties are located in prime Southern
California suburban submarkets (including a complex of three Office Properties
located in El Segundo, adjacent to the Los Angeles International Airport,
presently the nation's second largest air-cargo port, and a complex of five
Office Properties located adjacent to the Long Beach Municipal Airport) and one
Industrial Property is located in Phoenix, Arizona. As of June 30, 1996, the
Office Properties were approximately 94.1% leased to 88 tenants and the
Industrial Properties were approximately 98.4% leased to nine tenants. The
average age of the Office Properties and the Industrial Properties is
approximately ten years and twenty-seven years, respectively. The Company
developed and leased all but one of the Office Properties and seven of the nine
Industrial Properties, and, upon consummation of the Offering and acquisition
of the Acquisition Properties, will manage all of the Properties.
 
  The Company was founded in 1947 by John B. Kilroy, Sr., a nationally
prominent member of the real estate community, and is led by John B. Kilroy,
Jr., the Company's Chief Executive Officer and President. The Company's
executive officers have served as members of the Company's executive management
team for an average of approximately 15 years. The Company presently has 46
employees, 36 of whom are located at the Company's headquarters at Kilroy
Airport Center at El Segundo, California. Upon consummation of the
 
                                       1
<PAGE>
 
Offering, the Company's officers and directors (and certain of their
affiliates) will own in the aggregate 15.2% of the Company's Common Stock (or
interests exchangeable therefor).
 
  The Company's strategy has been to own, develop, acquire, lease and manage
Class A properties in select locations in key suburban submarkets, primarily in
Southern California, that the Company believes have strategic advantages
compared to neighboring submarkets. Existing locations offer tenants: (i) lower
business taxes and operating expenses than in adjoining submarkets; (ii) access
to highly skilled labor markets; (iii) strategic access to major transportation
facilities such as freeways, airports and the expanded Southern California
light-rail system; (iv) proximity to the Los Angeles-Long Beach port complex
which presently ranks as the largest commercial port in the United States; and
(v) for tenants with their names on certain Properties, visibility to freeway
and airplane travelers. As a result, the Properties attract major corporate
tenants and historically have achieved among the highest occupancy, tenant
retention and rental rates, both within their respective submarkets and as
compared to their respective neighboring submarkets. See "Business and
Properties--Office Properties" and "--Industrial Properties."
 
  The Company's major tenants include, among others, Hughes Electronic
Corporation's Space & Communications Company and related companies ("Hughes
Space & Communications"), a tenant since 1984, which is engaged in high-
technology commercial activities including satellite development and related
applications such as DirecTV, as well as Mattel, Inc., Northwest Airlines,
Inc., Olympus America, Inc. and Furon Co., Inc. As of December 31, 1995, the
Company's ten largest tenants (based upon December 31, 1995 base rents) had
leased space from the Company for an average of 5.4 years. The Company's strong
relationships with its tenants is further evidenced by its average tenant
retention rate (based upon rentable square feet) for the three-year period
ended December 31, 1995, which was 72.2%. The Company's extensive experience
and long-term presence in Southern California have enabled it to form key
alliances and working relationships with large corporate tenants,
municipalities and landowners that have led to a variety of development
projects and provide a continuing source of development and acquisition
opportunities with institutional sellers. As a result of its experience and
relationships, the Company currently has exclusive rights to develop
approximately 24 acres of developable land (net of the acreage required for
streets) at Kilroy Airport Center Long Beach, and has an exclusive agreement to
negotiate to acquire an additional six acres of developable land (net of
acreage reserved for open areas) at the Thousand Oaks Civic Arts Plaza
Entertainment and Retail Center (together, the "Development Properties"). These
properties are presently entitled for over 1.0 million rentable square feet of
office, industrial and retail space, creating acquisition and development
opportunities without, in most cases, significant carrying costs. See "Business
and Properties--Development, Leasing and Management Activities."
 
  The Company believes, based on independent economic surveys, that the
Southern California office and industrial real estate market is recovering
after experiencing a downturn over the last several years. Vacancy rates in the
Class A office space market in the greater Southern California area, including
the counties of Los Angeles, Orange, Riverside, San Bernardino and Ventura (the
"Southern California Area"), have decreased from a high in 1991 and 1992 of
nearly 20.0% to a level at the end of 1995 of under 18.0%. Vacancy rates in the
industrial space market in the Southern California Area also are decreasing
from a high of nearly 14.0% in 1992 to 9.2% at the end of 1995. In addition,
the Company has on average achieved increases in rental rates since 1994 in the
Office Properties it has managed. See "--The Company's Southern California
Submarkets" and "Business and Properties--The Company's Southern California
Submarkets." Management believes that the on-going economic recovery in its
submarkets will continue the trend of increasing occupancy rates and will cause
rents for all of the Properties to increase. See "--Growth Strategies."
 
  The Company believes that the foundation for its growth in future years will
be the strengthening Southern California economy, the quality and strategic
location of its Properties, the economic benefits of its submarkets to tenants,
its capital structure, its access to public capital markets, the lack of new
construction of office
 
                                       2
<PAGE>
 
properties in its submarkets, its access to developable properties, the
knowledge and experience of its senior management team and its long-term
relationships with large Southern California corporate tenants, municipalities,
landowners and institutional sellers. In addition, the Company believes that it
will be one of a limited number of REITs focusing on office and industrial
properties and that it will be the only REIT with a 50-year operating history
concentrating primarily on suburban Southern California office and industrial
properties. In the 12 months following the consummation of the Offering, the
Company expects sources of potential growth in cash available for distribution
per share from the amount set forth under the caption "Distribution Policy"
through: (i) the further leasing of its available space, currently
approximately 101,000 rentable square feet; (ii) the renewal of leases for
approximately 35,000 rentable square feet which expire during such period;
(iii) the acquisition of strategic properties with Units and/or with available
cash and borrowings under its $100.0 million revolving credit facility (the
"Credit Facility") and (iv) additional fees from development services and
related leasing and management services provided to third parties. In the
second 12-month period following consummation of the Offering, the Company
expects sources of potential growth in cash flow per share
from: (i) contractual increases in base rent payments from tenants; (ii)
continued leasing of available space; (iii) the contemplated completion of
certain planned development activities; (iv) increased fee income, including
development fees and related leasing and management services provided to third
parties; and (v) the acquisition of strategic properties. In addition, the
Company presently plans to expand one or more of its Industrial Properties
during the next two years, subject to substantial pre-leasing. There can be no
assurance, however, that the Company will achieve any growth in cash available
for distribution per share, that available space will be leased, that leases
scheduled to expire will be renewed or that the Company will successfully
acquire additional properties or complete any of its planned development
activities. See "Risk Factors--Real Estate Investment Considerations--Risks of
Real Estate Acquisition and Development."
 
  The Company will continue its practice of performing substantially all
leasing, management and tenant improvements on an "in-house" basis and will be
self-administered and self-managed. The Company expects to qualify as a REIT
for federal income tax purposes beginning with its taxable year ending December
31, 1996. See "Federal Income Tax Consequences--Taxation of the Company."
 
                                  RISK FACTORS
 
  This Prospectus contains certain forward looking statements within the
meaning of Section 27A of the Securities Act of 1933, as amended ("Securities
Act") and Section 21E of the Securities Exchange Act of 1934, as amended
("Exchange Act"). Actual results could differ materially from those projected
in the forward looking statements as a result of certain uncertainties set
forth below and elsewhere in this Prospectus. An investment in the shares of
Common Stock involves various material risks. Prospective investors should
carefully consider the following risk factors, in addition to the other
information set forth in this Prospectus, in connection with an investment in
the shares of Common Stock offered hereby. Such risks include, among others:
 
  .  geographic concentration of all but one of its Properties in Southern
     California, creating a dependence on demand for office, industrial and
     retail space in such market and increasing the risk that the Company
     will be materially adversely affected by general economic conditions in
     a single market;
 
  .  the Company's results of operations are dependent on certain key
     tenants, particularly Hughes Space & Communications, which accounted for
     approximately 29.6% of the Company's total base rental revenues for the
     year ending December 31, 1995 (giving pro forma effect to a recent
     extension of a lease with Hughes Space & Communications with respect to
     two of the Office Properties located at Kilroy Airport Center at El
     Segundo). The base periods of the Hughes Space & Communications' leases
     expire beginning in January 1999;
 
  .  a portion of the Company's anticipated cash flow may be generated from
     development activities, which are partially dependent on the
     availability of development opportunities, and which are subject to the
 
                                       3
<PAGE>
 
     risks inherent in development as well as general economic conditions,
     and such activities will be subject to limitations imposed by the REIT
     tests;
 
  .  the distribution requirements for REITs under federal income tax laws
     may limit the Company's ability to finance future acquisitions,
     developments and expansions without additional debt or equity financing
     and may limit cash available for distribution;
 
  .  the valuation of the Properties was not based on third-party appraisals
     and there have not been arm's-length negotiations with respect to such
     values. The consideration to be paid by the Company for the Properties
     may exceed their aggregate fair market value;
 
  .  real estate investment considerations such as the effect of economic and
     other conditions on real estate values, the general lack of liquidity of
     investments in real estate, the ability of tenants to pay rents, the
     possibility that leases may not be renewed or will be renewed on terms
     less favorable to the Company, the possibility of uninsured losses,
     including losses associated with earthquakes, the ability of the
     Properties to generate sufficient cash flow to meet operating expenses,
     including debt service, and competition in seeking properties for
     acquisition and in seeking tenants;
 
  .  risks associated with debt financing, including the potential inability
     to refinance mortgage indebtedness upon maturity and the potential
     increase in the level of indebtedness incurred by the Company since its
     organizational documents do not limit the amount of indebtedness which
     the Company may incur;
 
  .  conflicts of interest, particularly with the Continuing Investors
     (including John B. Kilroy, Sr. and John B. Kilroy, Jr.) in connection
     with the (i) Formation Transactions, (ii) operation of the Company's
     ongoing businesses, including conflicts associated with the tax
     consequences to Continuing Investors of sales or refinancings of any of
     the Properties, which may influence the Company's decision to sell or
     refinance the Properties or prepay debt secured by certain Properties,
     (iii) Company's election to exercise its option to purchase any of the
     properties owned or controlled by one or more of the Continuing
     Investors which the Company has the option to acquire (the "Excluded
     Properties") and (iv) enforcement of agreements with affiliates of the
     Company, any of which could result in decisions affecting the Company
     that do not fully reflect interests of all of the Company's
     stockholders;
 
  .  taxation of the Company as a corporation if it fails to qualify as a
     REIT for federal income tax purposes, taxation of the Operating
     Partnership as a corporation if it fails to qualify as a partnership for
     federal income tax purposes (and the resulting failure of the Company to
     qualify as a REIT), the Company's liability for certain federal, state
     and local income taxes in any of such events and the resulting decrease
     in cash available for distribution;
 
  .  substantial influence over the affairs of the Company by certain
     Continuing Investors who are directors and executive officers of the
     Company, including the ability of the Board of Directors to change the
     investment policies of the Company (including the Company's ratio of
     debt to total market capitalization) without the consent of
     stockholders;
 
  .  potential antitakeover effects of provisions generally limiting the
     actual or constructive ownership by any one person or entity of Common
     Stock to 8.0% of the outstanding shares, a classified board of directors
     and other charter and statutory provisions and provisions in the
     Operating Partnership partnership agreement that may have the effect of
     inhibiting a change of control of the Company or making it more
     difficult to effect a change in management or limiting the opportunity
     for stockholders to receive a premium over the market price for the
     Common Stock;
 
  .  the inability of the Company to control the operations of the Services
     Company, which could result in decisions that do not reflect the
     Company's interest because the Company does not control the election of
     directors or the selection of officers of the Services Company and the
     Services Company is controlled by a board of directors, the majority of
     whose members are not employed by the Company;
 
                                       4
<PAGE>
 
 
  .  the Company's cash available for distribution may be less than the
     Company expects and may decrease in future periods from expected levels,
     materially adversely affecting the Company's ability to make the
     expected annual distributions of $1.60 per share during the 12-month
     period following consummation of the Offering (which represents
     approximately 90.4% of the estimated cash available for distribution for
     such period) or to sustain such distribution rate in the future;
 
  .  immediate and substantial dilution in the net tangible book value per
     share of the shares of Common Stock purchased by new investors in the
     Offering;
 
  .  no prior public market for the shares of Common Stock, including the
     risk that an active trading market might not develop, or if developed
     might not be maintained, and the impact upon the price at which shares
     of the Common Stock may be resold;
 
  .  potential adverse effects on the value of the shares of Common Stock of
     fluctuations in interest rates or equity markets;
 
  .  dependence on key personnel;
 
  .  the possible issuance of additional shares, including upon exchange of
     the Units, which may adversely affect the market price of the shares of
     Common Stock or result in dilution on a per share basis of cash
     available for distribution;
 
  .  the Company's historical operating losses for financial reporting
     purposes; and
 
  .  the potential liability of the Company for environmental matters and the
     costs of compliance with certain governmental regulations.
 
                               GROWTH STRATEGIES
 
  The Company's objectives are to maximize growth in cash flow per share and to
enhance the value of its portfolio through effective management, operating,
acquisition and development strategies. The Company believes that opportunities
exist to increase cash flow per share: (i) by acquiring office and industrial
properties with attractive returns in strategic suburban submarkets where such
properties complement its existing portfolio; (ii) from contractual increases
in base rent; (iii) as a result of increasing rental and occupancy rates and
decreasing concessions and tenant installation costs as vacancy rates in the
Company's submarkets generally continue to decline; (iv) by developing
properties for the benefit of the Company where such development will result in
a favorable risk adjusted return on investment or, alternatively, on a fee
basis for others; and (v) by expanding Properties within the Company's existing
industrial portfolio.
 
  The Company believes that a number of factors will enable it to achieve its
business objectives, including: (i) the opportunity to lease available space at
attractive rental rates because of increasing demand and, with respect to the
Office Properties, the present lack of new construction in the Southern
California submarkets in which the Properties are located; (ii) the presence of
distressed sellers and inadvertent owners (through foreclosure or otherwise) of
office and industrial properties in the Company's markets, as well as the
Company's ability to acquire properties with Units (thereby deferring the
seller's taxable gain), all of which create enhanced acquisition opportunities;
(iii) the quality and location of the Company's Properties; (iv) the Company's
access to development opportunities as a result of its significant
relationships with large Southern California corporate tenants, municipalities
and landowners and its nearly 50-year presence in the Southern California
market; and (v) the limited availability to competitors of capital for
financing development, acquisitions or capital improvements. Management
believes that the Company is well positioned to exploit existing opportunities
because of its extensive experience in its submarkets, its seasoned management
team and its proven ability to develop, lease and efficiently manage office and
industrial properties. In addition, the Company believes that public ownership
and its capital structure will provide new opportunities for growth. There can
be no assurance,
 
                                       5
<PAGE>
 
however, that the Company will be able to lease available space, complete any
property acquisitions, successfully develop any land acquired or improve the
operating results of any developed properties that are acquired. See "Business
and Properties--Development, Leasing and Management Activities."
 
  Operating Strategies. The Company will focus on enhancing growth in cash flow
per share by: (i) maximizing cash flow from existing Properties through active
leasing, contractual base rent increases and effective property management;
(ii) managing operating expenses through the use of in-house management,
leasing, marketing, financing, accounting, legal, construction management and
data processing functions; (iii) maintaining and developing long-term
relationships with a diverse tenant group; (iv) attracting and retaining
motivated employees by providing financial and other incentives to meet the
Company's operating and financial goals; and (v) continuing to emphasize
capital improvements to enhance the Properties' competitive advantages in their
markets.
 
  The Company believes that the strength of its leasing is demonstrated by the
Company's leasing activity since 1993. In the period from January 1, 1993 to
June 30, 1996, the Company leased or renewed leases for an aggregate of
approximately 845,000 rentable square feet of office space and approximately
318,000 rentable square feet of industrial space. As of December 31, 1995, the
Office Properties were approximately 89.3% leased as compared to approximately
82.0% for the Southern California Area, approximately 89.2% for the El Segundo
submarket and approximately 85.4% in the Long Beach submarket. In addition, at
December 31, 1995, the Industrial Properties were approximately 98.4% leased as
compared to approximately 82.3% and approximately 87.1% for industrial
properties located in Los Angeles and Orange Counties, respectively. As of June
30, 1996, (i) the Office Properties contained approximately 1.5 million
rentable square feet and were approximately 94.1% leased, and (ii) the
Industrial Properties contained an aggregate of approximately 900,000 rentable
square feet and were approximately 98.4% leased. In addition, the number of
individual lease transactions since 1992, including the results for the six-
month period ended June 30, 1996, averaged over 26 per year. See "Business and
Properties--General," "--Properties," "--Occupancy and Rental Information" and
"--The Company's Southern California Submarkets."
 
  Approximately 800,000 aggregate rentable square feet in the Properties was
leased by the Company from January 1, 1992 through December 31, 1994, a period
which management characterizes as recessionary. Based on the leases the Company
signed in 1996, and the findings in an independent study of the Southern
California real estate market commissioned by the Company, management believes
that the recent trend toward increasing rental rates in Class A office and
industrial buildings in the Company's submarkets presents significant
opportunities for growth. In addition, approximately 72.7% of the Company's net
rentable square feet is subject to leases expiring in 2000 or beyond, when
management expects asking rents for the respective Properties to be higher than
the rents paid pursuant to such leases. In addition, approximately 34.2% of the
Company's total base rent (representing approximately 26.0% of the Company's
total rentable square feet) is attributable to leases with Consumer Price Index
increases. No assurance can be given, however, that new leases will reflect
rental rates greater than or equal to current rental rates or that current or
future economic conditions will support higher rental rates. See "Risk
Factors--Real Estate Investment Considerations."
 
  Acquisition Strategies. The Company will seek to increase its cash flow per
share by acquiring additional quality office and industrial properties,
including properties that may: (i) provide attractive initial yields with
significant potential for growth in cash flow from property operations; (ii)
are strategically located, of high quality and competitive in their respective
submarkets; (iii) are located in the Company's existing submarkets and/or in
other strategic submarkets where the demand for office and industrial space
exceeds available supply; or (iv) have been under-managed or are otherwise
capable of improved performance through intensive management and leasing that
will result in increased occupancy and rental revenues. The Company believes
that the Southern California market is an established and mature real estate
market in which property owners generally have a low tax basis (and,
accordingly, the potential for large taxable gains) in their properties.
Management believes that the Company's extensive experience, capital structure
and ability to acquire properties
 
                                       6
<PAGE>
 
for Units, and thereby defer a seller's taxable gain, if any, will enhance the
ability of the Company to consummate transactions quickly and to structure more
competitive acquisitions than other real estate companies in the market which
lack its access to capital or the ability to issue Units. See "Business and
Properties--Development, Leasing and Management Activities."
 
  The Company has entered into an agreement to acquire the two office
properties that comprise Phase I of Kilroy Airport Center Long Beach. Kilroy
Airport Center Long Beach Phase I was developed by the Company in 1987 and has
been leased and managed by the Company since its inception. In addition, the
Company has entered into an agreement to purchase an office property located in
Thousand Oaks, California. The acquisition of these properties (the
"Acquisition Properties") by the Company is expected to occur concurrently with
the consummation of the Offering and, accordingly, the Acquisition Properties
are included in the discussion of the Office Properties included throughout
this Prospectus. The Company also has entered into agreements to acquire three
industrial properties, each of which remains subject to satisfactory
documentation and completion of the Company's due diligence procedures.
Accordingly, there can be no assurance that any of such properties will be
acquired. There can be no assurance, however, that the Company will be able to
complete any property acquisitions, successfully develop any land acquired or
improve the operating results of any developed properties that are acquired.
See "Business and Properties--Acquisition Properties."
 
  Development Strategies. The Company's interests in the Development Properties
provide it with significant growth opportunities. These projects allow the
Company to control development on the land, while significant costs of carry
prior to the completion of development are in most cases funded by others.
 
  The Company is the master ground lessee of, and has sole development rights
in, Kilroy Airport Center Long Beach, a planned four-phase, approximately 53-
acre property entitled for office, research and development,
light industrial and other commercial projects at which the Company owns all
five existing Office Properties and manages all ongoing leasing and development
activities. The Company developed Phases I and II in 1987 and 1989/1990,
respectively, encompassing an aggregate of approximately 620,000 rentable
square feet of office space. Phases III and IV presently are planned to be
developed on the projects' approximately 24 undeveloped acres and are entitled
for an aggregate of approximately 900,000 rentable square feet. The Company is
currently in discussions with several prospective tenants for office space
presently planned to be included in Kilroy Long Beach Phase III. See "Business
and Properties--Development, Leasing and Management Activities--Kilroy Long
Beach."
 
  The Company has entered into an exclusive agreement to negotiate a
Development and Disposition Agreement in connection with the Thousand Oaks
Civic Arts Plaza Retail and Entertainment Center project, an approximately 11-
acre project (representing approximately six developable acres net of acreage
reserved for open areas) presently contemplated to include an approximately
90,000 square foot multiplex theater and virtual reality entertainment center
and retail space. The project is located in the City of Thousand Oaks,
immediately adjacent to the City's recently completed $65 million Civic Arts
Plaza Complex. See "Business and Properties--Development, Leasing and
Management Activities--Thousand Oaks."
 
  The Company also has entered into a Development Management Agreement in
connection with the development, on a fee basis, of the Riverside Judicial
Center. See "Business and Properties--Development, Management and Leasing
Activities--Riverside Judicial Center." In addition, the Company has been
engaged on a fee basis as a consultant in connection with the development of an
approximately 200-acre site presently owned by Northrop Grumman Corporation.
See "Business and Properties--Development, Management and Leasing Activities--
Northrop Grumman."
 
  In addition, certain of the Industrial Properties can support additional
development, and the Company presently is planning to develop in the next two
years, subject to substantial pre-leasing, approximately 105,000 rentable
square feet of such additional space.
 
  The Company may engage in the development of other office and/or industrial
properties primarily in Southern California submarkets when market conditions
support a favorable risk-adjusted return on such
 
                                       7
<PAGE>
 
development. The Company's activities with third-party owners in Southern
California are expected to give the Company further access to development
opportunities. There can be no assurance, however, that the Company will be
able to successfully develop any of the Development Properties or any other
properties. See "Business and Properties--Development, Leasing and Management
Activities."
 
  Financing Policies. The Company intends to limit the ratio of debt to total
market capitalization (total debt of the Company as a percentage of the market
value of issued and outstanding shares of Common Stock, including interests
exchangeable therefor, plus total debt) to approximately 50%, although the
Company's organizational documents do not limit the amount of indebtedness that
the Company may incur. Upon completion of the transactions outlined under the
caption "Formation and Structure of the Company," total debt will constitute
approximately 25.6% of the total market capitalization of the Company (assuming
an initial public offering price of $20.00 per share of Common Stock). The
Company anticipates that upon consummation of the Offering all of its permanent
indebtedness will bear interest at fixed rates. The Company intends to utilize
one or more sources of capital for future acquisitions, including development
and capital improvements, which may include undistributed cash flow, borrowings
under the Credit Facility, issuance of debt or equity securities and other bank
and/or institutional borrowings. There can be no assurance, however, that the
Company will be able to obtain capital for any such acquisitions, developments
or improvements on terms favorable to the Company. See "--Growth Strategies,"
"The Company--Growth Strategies" and "Business and Properties--Development,
Leasing and Management Activities" and "--Debt Structure."
 
                                       8
<PAGE>
 
                      THE OFFICE AND INDUSTRIAL PROPERTIES
 
  The following table sets forth certain information relating to each of the
Properties as of December 31, 1995, unless indicated otherwise. This table
gives pro forma effect to a recent extension of one of the leases with Hughes
Space & Communications with respect to two of the Office Properties located at
Kilroy Airport Center at El Segundo as if such lease renewal had occurred on
January 1, 1995. After completion of the Formation Transactions, the Company
(through the Operating Partnership) will own a 100% interest in all of the
Office and Industrial Properties other than the five Office Properties located
at Kilroy Airport Center Long Beach, which are held subject to ground leases
expiring in 2035.
 
<TABLE>
<CAPTION>
                                                                                                        AVERAGE
                                                          PERCENTAGE                         PERCENTAGE  BASE
                                                   NET      LEASED     1995                   OF 1995    RENT
                                                RENTABLE    AS OF      BASE        1995        TOTAL      PER     EFFECTIVE
                                                 SQUARE    12/31/95    RENT      EFFECTIVE      BASE    SQ. FT.    RENT PER
          PROPERTY LOCATION          YEAR BUILT   FEET      (%)(1)   ($000)(2) RENT($000)(3)  RENT (%)  ($)(4)  SQ. FT. ($)(5)
          -----------------          ---------- --------- ---------- --------- ------------- ---------- ------- --------------
 <S>                                 <C>        <C>       <C>        <C>       <C>           <C>        <C>     <C>
 Office Properties:                  
 Kilroy Airport Center at El Segundo 
  2250 E. Imperial Highway(8).......     1983     291,187    80.9      4,316       4,042        13.5     18.32      17.16
  2260 E. Imperial Highway)(9)......     1983     291,187   100.0      7,160       6,545        22.4     24.59      22.48
  2240 E. Imperial Highway(10)       
  El Segundo, California............     1983     118,933   100.0      1,130       1,121         3.5      9.50       9.43
 Kilroy Airport Center Long Beach    
  3900 Kilroy Airport Way(11).......     1987     126,840    94.0      2,282       2,092         7.1     19.14      17.54
                                                  
  3880 Kilroy Airport Way(11).......     1987      98,243   100.0      1,296       1,022         4.0     13.19      10.40 
                                                 
  3760 Kilroy Airport Way...........     1989     165,278    92.1      3,372       2,807        10.6     22.16      18.45 
  3780 Kilroy Airport Way...........     1989     219,745    63.6      3,465       3,005        10.8     24.79      21.50
  3750 Kilroy Airport Way            
  Long Beach, California............     1989      10,457   100.0         75          28         0.2      7.21       2.66
 2829 Townsgate Road                 
  Thousand Oaks, California(11).....     1990      81,158   100.0      1,888       1,760         5.9     23.26      21.69
 185 S. Douglas Street(12)           
  El Segundo, California............     1978      60,000   100.0      1,313         898         4.1     21.89      14.96
                                                ---------   -----     ------      ------       -----     -----      -----
 Subtotal/Weighted Average                      1,463,028    89.3     26,297      23,320        82.1     20.12      17.84
                                                ---------   -----     ------      ------       -----     -----      -----
 Industrial Properties:              
 2031 E. Mariposa Avenue             
  El Segundo, California............     1954     192,053   100.0      1,556       1,296         4.9      8.10       6.75
 3332 E. La Palma Avenue             
  Anaheim, California(15)...........     1966     153,320   100.0        881         790         2.8      5.74       5.16
 2260 E. El Segundo Boulevard        
  El Segundo, California(13)........     1979     113,820   100.0        553         510         1.7      4.86       4.48
                                                  
 2265 E. El Segundo Boulevard        
  El Segundo, California............     1978      76,570   100.0        554         493         1.7      7.23       6.44 
                                     
 1000 E. Ball Road                               
  Anaheim, California(14)...........     1956     100,000   100.0        639         519         2.0      6.39       5.19 
                                     
 1230 S. Lewis Street                             
  Anaheim, California...............     1982      57,730   100.0        303         284         0.9      5.25       4.92 
 12681/12691 Pala Drive              
  Garden Grove, California .........     1970      84,700    82.6        476         454         1.5      6.81       6.48
                                                  
 2270 E. El Segundo Boulevard        
  El Segundo, California(15)........     1975       7,500   100.0        129         129         0.4     17.17      17.17 
 5115 N. 27th Avenue                 
  Phoenix, Arizona(16)..............     1962     130,877   100.0        640         612         2.0      4.89       4.68
                                                ---------   -----     ------      ------       -----     -----      ----- 
 Subtotal/Weighted Average                        916,570    98.4      5,731       5,087        17.9      6.36       5.64
                                                ---------   -----     ------      ------       -----     -----      ----- 
 Office & Industrial--All Properties            2,379,598    92.8     32,028      28,407       100.0     14.50      12.86
                                                =========   =====     ======      ======       =====     =====      =====
<CAPTION>
                                                      TENANTS LEASING
                                       PERCENTAGE     10% OR MORE OF
                                         LEASED        NET RENTABLE
                                         AS OF        SQUARE FEET PER
                                        6/30/96          PROPERTY
          PROPERTY LOCATION             (%)(6)       AS OF 6/30/96(7)
          -----------------           -----------    ----------------
 <S>                                 <C>          <C> 
 Office Properties:                       
 Kilroy Airport Center at El Segundo      
  2250 E. Imperial Highway(8).......      85.2    Hughes Space & Communications        
                                                  (33.0%)                         
  2260 E. Imperial Highway)(9)......     100.0    Hughes Space & Communications                   
                                                  (100.0%)
  2240 E. Imperial Highway(10)                                                    
  El Segundo, California............     100.0    Hughes Space & Communications  
                                                 (94.6%)  
Kilroy Airport Center Long Beach                         
  3900 Kilroy Airport Way(11).......      94.0    McDonnell Douglas Corporation     
                                                  (50.9%), Olympus America, Inc.          
                                                  (18.6%)                          
  3880 Kilroy Airport Way(11).......     100.0    Devry, Inc. (100.0%)                                      
  3760 Kilroy Airport Way...........      91.2    R.L. Polk & Co. (9.8%)  
  3780 Kilroy Airport Way...........      90.5    SCAN Health Plan (20.4%), Zelda         
                                                  Fay Walls (12.7%)                         
  3750 Kilroy Airport Way                         
  Long Beach, California............     100.0    Oasis Cafe (37.1%),                     
                                                  Keywanfar & Baroukhim (16.1%),  
                                                  SR Impressions (15.0%)           
2829 Townsgate Road                     
  Thousand Oaks, California(11).....    100.0     Worldcom, Inc. (34.2%), Data Select            
                                                  Systems, Inc. (13.0%), Pepperdine       
                                                  University (12.7%), Anheuser Busch,            
                                                  Inc. (12.0%)                             
185 S. Douglas Street(12)            
  El Segundo, California............    100.0     Northwest Airlines, Inc. (100%)                                 
                                        -----                                                                 
Subtotal/Weighted Average                94.1                                                                     
                                        -----                                                                  
Industrial Properties:               
2031 E. Mariposa Avenue              
  El Segundo, California............    100.0     Mattel, Inc. (100%)                                             
 
3332 E. La Palma Avenue                                                                                      
  Anaheim, California(15)...........    100.0     Furon Co., Inc. (59.2%), Cerplex                                 
                                                  Group, Inc.(40.8%)                                                
2260 E. El Segundo Boulevard                     
  El Segundo, California(13)........    100.0     Ace Medical Co. (100%)                                                 
2265 E. El Segundo Boulevard                                                                                    
  El Segundo, California............    100.0     MSAS Cargo Intl., Inc.  (100%)                   
1000 E. Ball Road                                                      
  Anaheim, California(14)...........    100.0     Allen-Bradley Company (100%)                                  
1230 S. Lewis Street                     
  Anaheim, California...............    100.0     Extron Electronics (100%)                                  
12681/12691 Pala Drive                                                                                                    
  Garden Grove, California .........     82.6     Rank Video Services America, Inc. (82.6%)                    
2270 E. El Segundo Boulevard             
  El Segundo, California(15)........    100.0     Pacific Southwest Realty (100%)                                 
5115 N. 27th Avenue                      
  Phoenix, Arizona(16)..............    100.0     Festival Markets, Inc. (100%)                            
                                        -----                                                               
 Subtotal/Weighted Average               98.4                                                               
                                        -----                                                               
 Office & Industrial--All Properties     95.8                                                               
                                        =====                                                              
 </TABLE>                                                             
                                      
                              (footnotes on next page)
 
                                       9
<PAGE>
 
- --------
 (1) Based on all leases at the respective Properties in effect as of December
     31, 1995.
 (2) Total base rent for the year ended December 31, 1995, determined in
     accordance with generally accepted accounting principles ("GAAP"). All
     leases at the Industrial Properties are written on a triple net basis.
     Unless otherwise indicated, all leases at the Office Properties are
     written on a full service gross basis, with the landlord obligated to pay
     the tenant's proportionate share of taxes, insurance and operating
     expenses up to the amount incurred during the tenant's first year of
     occupancy ("Base Year") or a negotiated amount approximating the tenant's
     pro rata share of real estate taxes, insurance and operating expenses
     ("Expense Stop"). Each tenant pays its pro rata share of increases in
     expenses above the Base Year or Expense Stop.
 (3) Aggregate base rent received over their respective terms from all leases
     in effect at December 31, 1995 minus all tenant improvements, leasing
     commissions and other concessions for all such leases, divided by the
     terms in months for such leases, multiplied by 12. Tenant improvements,
     leasing commissions and other concessions are estimated using the same
     methodology used to calculate effective rent for the Properties as a whole
     in the charts set forth under the caption "Business and Properties--
     General."
 (4) Base rent for the year ended December 31, 1995 divided by net rentable
     square feet leased at December 31, 1995.
 (5) Effective rent at December 31, 1995 divided by net rentable square feet
     leased at December 31, 1995.
 (6) Based on all leases at the respective Properties dated on or before June
     30, 1996.
 (7) Excludes office space leased by the Company.
 (8) For this Property, a lease with Hughes Space & Communications, for
     approximately 96,000 rentable square feet, and with SDRC Software Products
     Marketing Division, Inc., for approximately 6,800 rentable square feet,
     are written on a full service gross basis except that there is no Expense
     Stop.
 (9) For this Property, the lease with Hughes Space & Communications is written
     on a modified full service gross basis under which Hughes Space &
     Communications pays for all utilities and other internal maintenance costs
     with respect to the leased space and, in addition, pays its pro rata share
     of real estate taxes, insurance, and certain other expenses including
     common area expenses.
(10) For this Property, leases with Hughes Space & Communications for
     approximately 101,000 rentable square feet are written on a full service
     gross basis except that there is no Expense Stop.
(11) This Property is an Acquisition Property.
(12) For this Property, the lease is written on a triple net basis.
(13) This Industrial Property was vacant until April 1995. The tenant began
     paying rent in mid-October 1995 at an annual rate of $4.86 per rentable
     square foot.
(14) The tenant subleased this Industrial Property on May 15, 1996 to RGB
     Systems, Inc. (doing business as Extron Electronics), the tenant of the
     Property located at 1230 S. Lewis Street, Anaheim, California, which is
     adjacent to this Property. The sublease is at an amount less than the
     current lease rate, and the tenant is paying the difference between the
     current lease rate and the sublease rate. The lease and the sublease
     terminate in April 1998. Extron Electronics has executed a lease for this
     space from May 1998 through April 2005 at the current lease rate. Extron
     Electronics continues to occupy the space located at 1230 S. Lewis Street.
(15) The leases for Cerplex Group, Inc. and Pacific Southwest Realty expired on
     June 30, 1996 and this space is presently available for rent.
(16) This Industrial Property was originally designed for multi-tenant use and
     currently is leased to a single tenant and utilized as an indoor multi-
     vendor retail marketplace.
 
                                       10
<PAGE>
 
 
                  THE COMPANY'S SOUTHERN CALIFORNIA SUBMARKETS
 
  The Company retained Robert Charles Lesser & Co. ("Lesser"), nationally
recognized experts in real estate consulting and urban economics, to study the
Company's Southern California submarkets, and the discussion of such submarkets
below is based upon Lesser's findings. While the Company believes that these
estimates of economic trends are reasonable, there can be no assurance that
these trends will in fact continue.
 
  The Company's Office and Industrial Properties are primarily located in Los
Angeles, Orange and Ventura Counties which, together with Riverside and San
Bernardino Counties, comprise the second largest Consolidated Metropolitan
Statistical Area in the United States. Management believes that the region's
economy, which in 1994 commenced recovery from a four-year economic recession,
and the continuing growth in the region's foreign trade, tourism and
entertainment industries, provide an attractive environment for owning and
operating Class A office and industrial properties where occupancy rates and
asking rents generally are increasing. In addition, since 1992 there has been
virtually no increase in the region's office space, while the region's demand
for quality industrial space and low vacancy rates has spurred modest new
construction of industrial properties.
 
  Vacancy rates in the office space market in the Southern California Area are
trending downward from a high in 1991 and 1992 of nearly 20.0% to a level at
the end of 1995 of under 18.0%. At December 31, 1995, the vacancy rate for the
Office Properties was approximately 10.7%. Vacancy rates in the industrial
space market in the Southern California Area have decreased from a high of
nearly 14% in 1992 to approximately 9.2% at December 31, 1995. At December 31,
1995, the vacancy rate for the Industrial Properties was approximately 1.6%.
 
  As of December 31, 1995, the Southern California Area had a total population
of approximately 15.6 million people which accounted for approximately 5.9% of
the total U.S. population. Beginning in 1990, annual population growth in the
region has averaged approximately 217,000 persons. Of the total population at
December 31, 1995, approximately 9.2 million and 2.6 million persons lived in
Los Angeles and Orange Counties, respectively, the counties in which all but
two of the Properties are located. Annual estimated growth in population over
the next five years in these counties is expected to be approximately 94,000
and 32,000 persons, respectively. See "Business and Properties--The Company's
Southern California Submarkets."
 
                                 THE FINANCING
 
  The Company, on behalf of the Operating Partnership, intends to obtain a
written commitment for a mortgage loan of $75.0 million (the "Mortgage Loan"),
the closing of which is a condition to the consummation of the Offering. The
proceeds of the Mortgage Loan will principally be used to repay existing
indebtedness on the Properties. Payment of principal and interest on the
Mortgage Loan is expected to be secured by certain of the Properties. The
Mortgage Loan is expected to require monthly principal and interest payments
based on a fixed rate, amortizing over a 25-year period, maturing in 2003.
 
  The Company expects to obtain a written commitment to establish a $100.0
million revolving credit facility (the "Credit Facility" and, together with the
Mortgage Loan, the "Financing") which the Company, on behalf of the Operating
Partnership, expects to enter into concurrently with the consummation of the
Offering. The Credit Facility will be used primarily to finance acquisitions of
additional properties and to finance the development of properties, although a
portion may be used for general working capital purposes. Payment of principal
and interest is expected to be secured by certain of the Properties. In
addition, borrowings under the Credit Facility are expected to be recourse
obligations to the Company and the Operating Partnership.
 
  If the initial public offering price for the Common Stock is less than the
midpoint of the range set forth on the cover page of this Prospectus, the
Company expects to make up any shortfall between the aggregate net proceeds of
the Offering and the Mortgage Loan, and the intended uses thereof, with
borrowings under the Credit Facility. See "Use of Proceeds."
 
                                       11
<PAGE>
 
 
                     FORMATION AND STRUCTURE OF THE COMPANY
 
  The Company was formed in September 1996 and the Operating Partnership was
formed in October 1996. The Services Company will be formed prior to
consummation of the Offering. Prior to or simultaneous with the consummation of
the Offering, the Company, the Operating Partnership, the Services Company and
the Continuing Investors will engage in certain transactions (the "Formation
Transactions"), designed to enable the Company to continue and expand the real
estate operations of the Continuing Investors, to facilitate the Offering, to
enable the Company to qualify as a REIT for federal income tax purposes
commencing with its taxable year ending December 31, 1996 and to preserve
certain tax advantages for the existing owners of the Properties. The Formation
Transactions are as follows:
 
  . Pursuant to an omnibus option agreement (the "Omnibus Agreement"), the
    Operating Partnership may require the contribution of all of the
    Continuing Investors' interests in the Properties, as well as certain
    other assets, other than the Acquisition Properties, to the Operating
    Partnership in exchange for Units representing limited partnership
    interests in the Operating Partnership. Following the consummation of the
    Offering and the Formation Transactions, the Units received by the
    Continuing Investors will constitute in the aggregate an approximately
    15.2% limited partnership interest in the Operating Partnership.
 
  . John B. Kilroy, Sr. and John B. Kilroy, Jr. will acquire all of the
    voting common stock of the Services Company (representing 5.0% of its
    economic value), and the Operating Partnership will acquire all of the
    non-voting preferred stock of the Services Company (representing 95.0% of
    its economic value).
 
  . The Company will sell shares of Common Stock in the Offering and
    contribute the net proceeds from the Offering (approximately $169.7
    million) to the Operating Partnership in exchange for an 84.8% general
    partner interest in the Operating Partnership.
 
  . The Operating Partnership will borrow approximately $75.0 million in
    principal amount of long-term financing pursuant to the Mortgage Loan.
 
  . The Company, through the Operating Partnership, will apply the aggregate
    of the net Offering proceeds and the Financing toward the repayment of
    existing mortgage indebtedness on certain of the Properties, the purchase
    of the Acquisition Properties and the payment of its expenses from the
    Offering and the Financing. See "Use of Proceeds."
 
  . Certain of the current employees of KI will become employees of the
    Company, the Operating Partnership and/or the Services Company.
 
  . The Operating Partnership or the Services Company will enter into
    management agreements with respect to each of the Excluded Properties.
 
  . Pursuant to the Omnibus Agreement and certain other option agreements,
    the Operating Partnership will be granted exclusive options to acquire
    each of the Excluded Properties.
 
  The Continuing Investors are comprised of seven individuals, all of whom are
"accredited investors" as defined in Regulation D ("Regulation D") under the
Securities Act, and corporations, partnerships and trusts owned, directly or
indirectly, solely by such individuals. Each such individual is an adult member
of the family of John B. Kilroy, Sr. and/or a long-time officer of KI. Consent
of such persons to the Formation Transactions was received on or before
November 3, 1996 pursuant to a private solicitation thereof in compliance with
Regulation D.
 
                                       12
<PAGE>
 
 
  The following diagram illustrates the structure of the Company, the Operating
Partnership and the Services Company after the consummation of the Offering and
the Formation Transactions:
 
 
                           Kilroy Realty Corporation
                                (the "Company")
                              100% owned by public
                               stockholders(/1/)
 
 
 
                              Kilroy Realty, L.P.
                         (the "Operating Partnership")
                           84.8% owned by the Company
                               as general partner
                    15.2% owned by the Continuing Investors
                              as limited partners
 
 
 
                             Kilroy Services, Inc.
                            (the "Services Company")
                                100% non-voting
                            preferred stock owned by
                         the Operating Partnership(/2/)
                            100% voting common stock
                          owned by John B. Kilroy, Sr.
                          and John B. Kilroy, Jr.(/3/)
 
- --------
(1) If all Units of the Operating Partnership were exchanged for Common Stock,
    the Company would be owned approximately 84.8% by public stockholders and
    approximately 15.2% by the Continuing Investors. Beginning on the second
    anniversary of the consummation of the Offering, each Unit will be
    redeemable by the Operating Partnership at the request of the Unitholder
    for cash (based on the fair market value of an equivalent number of shares
    of Common Stock at the time of such redemption) or, at the Company's
    option, it may exchange Units for shares of Common Stock on a one-for-one
    basis, subject to certain antidilution adjustments and exceptions;
    provided, however, that if the Company does not elect to exchange such
    Units for shares of Common Stock, a Unitholder that is a corporation or
    limited liability company may require the Company to issue shares of Common
    Stock in lieu of cash, subject to the Ownership Limit, or such other limit
    as provided in the Company's Articles of Incorporation or as otherwise
    permitted by the Board of Directors. See "Partnership Agreement of
    Operating Partnership--Redemption/Exchange Rights." Under certain
    circumstances, the Units may be redeemed prior to the second anniversary of
    the consummation of the Offering in connection with the obligation of
    certain of the Continuing Investors to indemnify the Company in connection
    with the Formation Transactions. See "Formation and Structure of the
    Company--Allocation of Consideration in the Formation Transactions."
    Officers, directors and employees of the Company will have options to
    acquire approximately 430,000 shares of Common Stock which could reduce the
    percentage owned by public stockholders to approximately 81.6% (assuming
    exchange of all outstanding Units and the exercise of all outstanding
    options).
(2)Represents 95.0% of the economic interest in the Services Company.
(3)Represents 5.0% of the economic interest in the Services Company.
 
                                       13
<PAGE>
 
 
BENEFITS TO THE CONTINUING INVESTORS
 
  The principals of KI proposed the Formation Transactions to the Continuing
Investors because they believe that the benefits of the organization of the
Company for the Continuing Investors outweigh the detriments to them. Benefits
to members of the Continuing Investors include:
 
  .  improved liquidity of their interests in the Properties, increased
     diversification of investment and deferral of the tax consequences of
     the contribution of their interests in the Properties to the Operating
     Partnership;
 
  .  repayment of indebtedness in the aggregate net amount of approximately
     $204.7 million resulting from the refinancing of existing mortgage
     indebtedness, approximately $34.8 million of which is guaranteed by
     certain members of the Kilroy Group, including the repayment of
     indebtedness of a Continuing Investor of approximately $3.4 million; and
 
  .  employment agreements between the Company and John B. Kilroy, Jr.
     providing annual salary, incentive compensation (including Common Stock
     options) and other benefits for his services as an officer of the
     Company. See "Management--Employment Agreements."
 
  No third party determination of the value of the Properties was sought or
obtained in connection with the acquisition by the Operating Partnership of the
Properties, and the terms of each of the option agreements relating to the
Excluded Properties were not determined through arm's-length negotiations.
There can be no assurance that the aggregate value of the consideration
received by the participants in the Formation Transactions, including the grant
of the options relating to the Excluded Properties, is equivalent to the fair
market value of the properties and assets acquired by the Company and the
Operating Partnership in connection with the Formation Transactions. See "Risk
Factors--No Appraisals; Consideration to be Paid for Properties and Other
Assets May Exceed their Fair Market Value" and "--Conflicts of Interest--
Competitive Real Estate Activities of Management."
 
                              DISTRIBUTION POLICY
 
  The Company presently intends to make regular quarterly distributions to
holders of its Common Stock. The first distribution, for the period commencing
upon the consummation of the Offering and ending     1997, is anticipated to be
approximately $    per share (which is equivalent to a quarterly distribution
of $.40 per share or an annual distribution of $1.60 per share) which results
in an initial annual distribution rate of 8.0%, based on the initial public
offering price set forth on the cover page of this Prospectus. The Company does
not expect to change its estimated distribution rate if any of the
Underwriters' over-allotment option is exercised. The Company currently expects
to distribute approximately 90.4% of estimated cash available for distribution
for the 12 months following the consummation of the Offering. Units and shares
of Common Stock will receive equal distributions. The Board of Directors may
vary the percentage of cash available for distribution which is distributed if
the actual results of operations, economic conditions or other factors differ
from the assumptions used in the Company's estimates.
 
  The Company established its initial distribution rate based on estimated cash
flow for the 12 months following the consummation of the Offering and the
Formation Transactions which the Company anticipates to be available for
distribution, taking into account rents under existing leases, estimated
operating expenses, capital improvements, debt service requirements and other
factors. To maintain its qualification as a REIT, the Company must make annual
distributions to stockholders of at least 95% of its taxable income, determined
without regard to the deduction for dividends paid and by excluding any net
capital gains. Under certain circumstances, the Company may be required to make
distributions in excess of cash flow available for distribution to meet such
distribution requirements. See "Distribution Policy."
 
                                       14
<PAGE>
 
 
  The Company's estimate of the initial distribution rate for the Common Stock
was based on the Company's estimate of cash available for distribution, which
is being made solely for the purpose of setting the initial distribution rate
and is not intended to be a projection or forecast of the Company's results of
operations or of its liquidity. The Company believes that its estimate of cash
available for distribution constitutes a reasonable basis for setting the
initial distribution rate. However, no assurance can be given that the
Company's estimate will be accurate. See "Risk Factors--Distribution Payout
Percentage."
 
                           TAX STATUS OF THE COMPANY
 
  The Company intends to elect to be taxed as a REIT under Sections 856 through
860 of the Internal Revenue Code of 1986, as amended (the "Code"), commencing
with its taxable year ending December 31, 1996 and believes its organization
and proposed method of operation will enable it to meet the requirements for
qualification as a REIT. To maintain REIT status, an entity must meet a number
of organizational and operational requirements, including a requirement that it
currently distribute at least 95% of its REIT taxable income (determined
without regard to the dividends paid deduction and by excluding net capital
gains) to its stockholders. As a REIT, the Company generally will not be
subject to federal income tax on net income it distributes currently to its
stockholders. If the Company fails to qualify as a REIT in any taxable year, it
will be subject to federal income tax at regular corporate rates and may not be
able to qualify as a REIT for the four subsequent taxable years. See "Risk
Factors--Adverse Consequences of Failure to Qualify as a REIT" and "Federal
Income Tax Considerations." Even if the Company qualifies for taxation as a
REIT, the Company may be subject to certain federal, state and local taxes on
its income and property. In addition, the Services Company will be subject to
federal and state income tax at regular corporate rates on its net income.
 
                                  THE OFFERING
 
<TABLE>
<S>                            <C>
Common Stock Offered Hereby..   9,260,000 shares
Common Stock Outstanding af-
 ter the Offering............  10,913,835 shares(/1/)
Use of Proceeds..............  Together with the net proceeds of the Financing,
                               repayment of approximately $204.7 million
                               principal amount of existing mortgage and other
                               indebtedness, approximately $36.3 million for
                               the purchase of the Acquisition Properties and
                               the remaining approximately $5.5 million to be
                               available for expenses of the Formation
                               Transactions, expenses of the Financing,
                               expenses of the Offering and as working capital.
NYSE symbol..................  KRC
</TABLE>
- --------
(1) Includes 1,653,835 Units (calculated on an as-exchanged basis) issued in
    connection with the Formation Transactions, but excludes 1,000,000 shares
    of Common Stock reserved for issuance pursuant to the Stock Incentive Plan
    (as defined herein). See "Management--Stock Incentive Plan" and "Shares
    Eligible for Future Sale."
 
                                       15
<PAGE>
 
 
                             SUMMARY FINANCIAL DATA
 
  The following table sets forth certain financial data on a pro forma basis
for the Company, and on an historical basis for the Kilroy Group, which consist
of the combined financial statements of the Kilroy Group (the "Combined
Financial Statements") whose financial results will be consolidated in the
historical and pro forma financial statements of the Company. The financial
data should be read in conjunction with the historical and pro forma financial
statements and notes thereto included in this Prospectus. The combined
historical summary financial data as of December 31, 1994 and 1995 and for each
of the three years in the period ended December 31, 1995 have been derived from
the Combined Financial Statements of the Kilroy Group audited by Deloitte &
Touche LLP, independent public accountants, whose report with respect thereto
is included elsewhere in this Prospectus. The selected combined historical
financial and operating information as of December 31, 1993, 1992 and 1991 and
June 30, 1996, and for the years ended December 31, 1992 and 1991 and the six
months ended June 30, 1995 and June 30, 1996, have been derived from the
unaudited Combined Financial Statements of the Kilroy Group and, in the opinion
of management, include all adjustments, consisting only of normal recurring
adjustments, necessary for a fair statement of the operating information for
the unaudited periods. The pro forma data assume the completion of the
Formation Transactions, including acquisition of the Acquisition Properties and
the consummation of the Offering (based upon the midpoint of the range of the
initial public offering price set forth on the cover page of this Prospectus)
and the Financing, and use of the aggregate net proceeds therefrom as described
under "Use of Proceeds" as of the beginning of the periods presented for the
operating data and as of the balance sheet date for the balance sheet data. The
pro forma financial data does not give effect to the recent extension of the
tenant lease with Hughes Space & Communications with respect to space leased in
the Office Property located at 2250 E. Imperial Highway, El Segundo, California
and a portion of the space leased in the Office Property located at 2240 E.
Imperial Highway, El Segundo, California. The pro forma financial data are not
necessarily indicative of what the actual financial position or results of
operations of the Company would have been as of and for the periods indicated,
nor does it purport to represent the future financial position and results of
operations.
 
                                       16
<PAGE>
 
             THE COMPANY (PRO FORMA) AND KILROY GROUP (HISTORICAL)
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                           SIX MONTHS ENDED JUNE 30,                      YEAR ENDED DECEMBER 31,
                         -------------------------------  -------------------------------------------------------------
                                    COMBINED HISTORICAL                           COMBINED HISTORICAL
                         PRO FORMA  --------------------  PRO FORMA  --------------------------------------------------
                           1996        1996      1995       1995       1995       1994       1993      1992      1991
                         ---------  ---------- ---------  ---------  ---------  ---------  --------  --------  --------
<S>                      <C>        <C>        <C>        <C>        <C>        <C>        <C>       <C>       <C>
STATEMENT OF OPERATIONS
 DATA:
 Rental income.......... $ 17,259    $ 14,837  $  13,949  $  32,884  $  28,285  $  27,518  $ 29,139  $ 27,935  $ 24,898
 Tenant reimbursements..    1,981       1,658      1,275      3,434      2,746      1,549     3,507     3,623     3,886
 Parking income.........      800         800        727      1,447      1,447      1,216     1,205     1,143     1,199
 Development and
  management fees.......                  458        695                 1,156        919       751       882       779
 Sale of air rights.....                                                 4,456
 Other income...........      261          58         52        803        395      1,077       174       180       144
                         --------    --------  ---------  ---------  ---------  ---------  --------  --------  --------
 Total revenues.........   20,301      17,811     16,698     38,568     38,485     32,279    34,776    33,763    30,906
                         --------    --------  ---------  ---------  ---------  ---------  --------  --------  --------
 Property expenses......    2,647       2,719      2,571      5,339      5,376      4,674     4,320     4,469     6,741
 Real estate taxes
  (refunds).............      726         518        670      1,503      1,139       (929)    2,500     3,276        96
 General and
  administrative
  expense...............    2,199         876        881      4,389      2,050      2,406     1,033       932       773
 Ground lease...........      399         230        216        813        475        591       772       696       568
 Development expenses...                  485        384                   737        468       581       429       255
 Interest expense.......    3,307       9,422     11,813      6,613     21,529     22,739    23,151    23,624    23,577
 Depreciation and
  amortization..........    4,571       4,051      4,013      9,352      8,313      8,740     8,990     8,954     8,196
                         --------    --------  ---------  ---------  ---------  ---------  --------  --------  --------
 Total expenses.........   13,849      18,301     20,548     28,009     39,619     38,689    41,347    42,380    40,206
                         --------    --------  ---------  ---------  ---------  ---------  --------  --------  --------
 Income (loss) before
  equity in income of
  subsidiary, minority
  interest and
  extraordinary item....    6,452        (490)    (3,850)    10,559     (1,134)    (6,410)   (6,571)   (8,617)   (9,300)
 Equity in income (loss)
  of subsidiary.........      (36)                              136
 Minority interest......     (975)                           (1,625)
 Extinguishment of
  debt..................               12,887                           15,267      1,847
                         --------    --------  ---------  ---------  ---------  ---------  --------  --------  --------
 Net income (loss)...... $  5,441    $ 12,397  $  (3,850) $   9,070  $  14,133  $  (4,563) $ (6,571) $ (8,617) $ (9,300)
                         ========    ========  =========  =========  =========  =========  ========  ========  ========
 Pro forma net income
  per share(1).......... $   0.59                         $     .98
                         ========                         =========
<CAPTION>
                                                                                      DECEMBER 31,
                                                                     --------------------------------------------------
                            JUNE 30, 1996                                         COMBINED HISTORICAL
                         ---------------------                       --------------------------------------------------
                                     COMBINED
                         PRO FORMA  HISTORICAL                         1995       1994       1993      1992      1991
                         ---------  ----------                       ---------  ---------  --------  --------  --------
<S>                      <C>        <C>                              <C>        <C>        <C>       <C>       <C>
BALANCE SHEET DATA:
 Real estate assets,
  before accumu-
  lated depreciation and
  amortization.......... $229,410    $193,110                        $ 191,744  $ 190,720  $189,079  $202,941  $201,873
 Total assets...........  159,002     121,825                          121,171    130,624   134,920   145,979   153,073
 Mortgages and loans....   75,000     204,601                          206,858    222,038   218,769   221,921   216,558
 Total liabilities......   85,323     217,108                          224,301    242,887   232,063   232,351   223,678
 Minority interest......   11,199
 Stockholders' equity
  (deficit).............   62,480     (95,283)                        (103,130)  (112,263)  (97,143)  (86,372)  (70,605)
</TABLE>
 
<TABLE>
<CAPTION>
                            SIX MONTHS ENDED JUNE 30,               YEAR ENDED DECEMBER 31,
                          --------------------------------  ------------------------------------------
                                      COMBINED HISTORICAL                   COMBINED HISTORICAL
                          PRO  FORMA  --------------------  PRO FORMA  -------------------------------
                             1996       1996       1995       1995       1995       1994       1993
                          ----------  ---------  ---------  ---------  ---------  ---------  ---------
<S>                       <C>         <C>        <C>        <C>        <C>        <C>        <C>
OPERATING DATA:
 Funds from
  Operations(2).........    $11,023      $3,561       $163    $19,911      2,723     $2,330     $2,419
 Office Properties:
 Square footage.........  1,463,028   1,156,787  1,156,787  1,463,028  1,156,787  1,156,787  1,156,787
 Average occupancy......       94.1%       93.2%      87.2%      89.3%      87.1%      87.6%      82.4%
 Industrial Properties:
 Square footage.........    916,570     916,570    916,570    916,570    916,570    916,570    916,570
 Average occupancy......       98.4%       98.4%      98.4%      98.4%      98.4%      79.7%      77.6%
</TABLE>
- -------
(1) Pro forma net income per share equals pro forma net income divided by the
    9,260,000 shares of Common Stock offered hereby.
(2) Industry analysts generally consider Funds from Operations an alternative
    measure of performance of an equity REIT. As defined by the National
    Association of Real Estate Investment Trusts ("NAREIT"), Funds from
    Operations represents net income (loss) before minority interest of unit
    holders (computed in accordance with GAAP), excluding gains (or losses)
    from debt restructuring and sales of property, plus real estate related
    depreciation and amortization (excluding amortization of deferred financing
    costs) and after adjustments for unconsolidated partnerships and joint
    ventures. For all periods presented, depreciation and amortization and, in
    1995 and 1994, gain on extinguishment of debt, were the only non-cash
    adjustments. Funds from Operations should not be considered as an
    alternative for net income as a measure of profitability nor is it
    comparable to cash flows provided by operating activities determined in
    accordance with GAAP.
 
                                       17
<PAGE>
 
                                 RISK FACTORS
 
  This Prospectus contains certain forward looking statements within the
meaning of Section 27A of the Securities Act and Section 21E of the Exchange
Act. Actual results could differ materially from those projected in the
forward looking statements as a result of certain uncertainties set forth
below and elsewhere in this Prospectus. An investment in the shares of Common
Stock involves various material risks. Prospective investors should carefully
consider the following risk factors, in addition to the other information set
forth in this Prospectus, in connection with an investment in the shares of
Common Stock offered hereby.
 
  DEPENDENCE ON SOUTHERN CALIFORNIA MARKET. Eighteen of the nineteen
Properties, comprising an aggregate of approximately 2.3 million rentable
square feet (representing approximately 94.5% of the aggregate rentable square
feet of all of the Properties), are located in Southern California.
Consequently, the Company's performance will be linked to economic conditions
and the demand for office, industrial and retail space in this region. The
Southern California economy has experienced significant recessionary
conditions in the past several years, primarily as a result of the downsizing
of the aerospace and defense industries; there is still a dependence on these
industries in the Company's El Segundo and Long Beach Airport area submarkets.
The recessionary conditions resulted in a general increase in vacancies and a
general decrease in net absorption and rental rates in the Company's El
Segundo and Long Beach Airport area submarkets. See "Business and Properties--
The Company's Southern California Submarkets." Any decline in the Southern
California economy generally may result in a material decline in the demand
for office, industrial and retail space, have a material adverse effect
greater than if the Company had a more geographically diverse portfolio of
properties, and may materially and adversely affect the ability of the Company
to make distributions to stockholders. See "Business and Properties--The
Company's Southern California Submarkets."
 
  In addition, eight Office Properties, representing approximately 90.4% of
the aggregate office space of all of the Office Properties, are located in two
office parks in El Segundo, California, and Long Beach, California,
respectively.
 
  DEPENDENCE ON SIGNIFICANT TENANTS. The Company's ten largest office tenants
represented approximately 52.3% of annual base rent for the year ended
December 31, 1995 (giving pro forma effect to a recent extension of a lease
with Hughes Space & Communications with respect to two of the Office
Properties located at Kilroy Airport Center at El Segundo), and its eight
industrial tenants represented approximately 16.0% of annual base rent for the
same period. Of this amount, its largest tenant, Hughes Space &
Communications, currently leases approximately 495,000 rentable square feet of
office space in Kilroy Airport Center at El Segundo, representing
approximately 29.6% of the Company's total base rent revenues for the year
ended December 31, 1995 (giving pro forma effect to the Hughes Space &
Communications lease extension). The base periods of the Hughes Space &
Communications leases expire beginning in January 1999. The Company's revenues
and cash available for distribution to stockholders would be
disproportionately and materially adversely affected in the event of
bankruptcy or insolvency of, or a downturn in the business of, or the
nonrenewal of leases by, any of its significant tenants, or the renewal of
such leases on terms less favorable to the Company than their current terms.
 
  CASH FLOW FROM DEVELOPMENT ACTIVITIES. A significant portion of the
Company's anticipated cash flow may be generated from development activities
which are partially dependent on the availability of development opportunities
and which are subject to the risks inherent with development and general
economic conditions. In addition, development activities will be subject to
limitations imposed by the REIT tests. See "Federal Income Tax Consequences--
Taxation of the Company--Income Tests." There can be no assurance that the
Company will realize such anticipated cash flows. See "Risk Factors--Real
Estate Investment Considerations--Risks of Real Estate Acquisition and
Development."
 
  DISTRIBUTIONS TO STOCKHOLDERS. Distributions by the Company to its
stockholders will be based principally on cash available for distribution from
the Properties. Increases in base rent under the leases of the Properties or
the payment of rent in connection with future acquisitions will increase the
Company's cash available for distribution to stockholders. However, in the
event of a default or a lease termination by a lessee, there could be
 
                                      18
<PAGE>
 
a decrease or cessation of rental payments and thereby a decrease in cash
available for distribution. In addition, the amount available to make
distributions may decrease if properties acquired in the future yield lower
than expected returns.
 
  The distribution requirements for REITs under federal income tax laws may
limit the Company's ability to finance future developments, acquisitions and
expansions without additional debt or equity financing. If the Company incurs
additional indebtedness in the future, it will require additional funds to
service such indebtedness and as a result amounts available to make
distributions may decrease. Distributions by the Company will also be
dependent on a number of other factors, including the Company's financial
condition, any decision to reinvest funds rather than to distribute such
funds, capital expenditures, the annual distribution requirements under the
REIT provisions of the Code and such other factors as the Company deems
relevant. In addition, the Company may issue from time to time additional
Units or shares of Common Stock in connection with the acquisition of
properties or in certain other circumstances. No prediction can be made as to
the number of such Units or shares of Common Stock which may be issued, if
any, and, if issued, the effect on cash available for distribution on a per
share basis to holders of Common Stock. Such issuances, if any, will have a
dilutive effect on cash available for distribution on a per share basis to
holders of Common Stock. See "The Company--Growth Strategies." The possibility
exists that actual results of the Company may differ from the assumptions used
by the Board of Directors in determining the initial distribution rate. In
such event, the trading price of the Common Stock may be adversely affected.
 
  To obtain the favorable tax treatment associated with REITs, the Company
generally will be required to distribute to its stockholders at least 95% of
its taxable income (determined without regard to the dividends paid deduction
and by excluding net capital gains) each year. In addition, the Company will
be subject to tax at regular corporate rates to the extent that it distributes
less than 100% of its taxable income (including net capital gains) each year.
The Company will also be subject to a 4% nondeductible excise tax on the
amount, if any, by which certain distributions paid by it with respect to any
calendar year are less than the sum of 85% of its ordinary income, 95% of its
capital gain net income and 100% of its undistributed income from prior years.
 
  The Company intends to make distributions to its stockholders to comply with
the distribution requirements of the Code and to reduce exposure to federal
income taxes and the nondeductible excise tax. Differences in timing between
the receipt of income and the payment of expenses in arriving at taxable
income and the effect of required debt amortization payments could require the
Company to borrow funds on a short-term basis to meet the distribution
requirements that are necessary to achieve the tax benefits associated with
qualifying as a REIT.
 
  NO APPRAISALS; CONSIDERATION TO BE PAID FOR PROPERTIES AND OTHER ASSETS MAY
EXCEED THEIR FAIR MARKET VALUE. No independent valuations or appraisals of the
Properties were obtained in connection with the Formation Transactions. The
valuation of the Company has been determined by considering the enterprise
value of the Company as a going concern based primarily upon a capitalization
of estimated and anticipated Funds from Operations (as defined) and cash
available for distribution and the other factors discussed in this Prospectus
under "Distribution Policy" and "Underwriting," rather than an asset-by-asset
valuation based on historical cost or current market value. This methodology
has been used because management believes it is appropriate to value the
Company as an ongoing business rather than with the view to values that could
be obtained from a liquidation of the Company or of individual assets owned by
the Company. Accordingly, there can be no assurance that the consideration
paid by the Company will not exceed the fair market value of the Properties
and other assets acquired by the Company. A valuation of the Company
determined solely by appraisals of the Properties and other assets of the
Company may result in a significantly lower valuation of the Company from that
which is reflected by the initial public offering price per share set forth on
the cover of this Prospectus, which also takes into account the businesses of
the Services Company, the earnings of the Properties and the going concern
value of the Company. See "Underwriting." Since the liquidation value of the
Company is likely to be significantly less than the value of the Company as a
going concern, stockholders may suffer a significant loss in the value of
their shares if the Company were required to sell its assets.
 
                                      19
<PAGE>
 
  The valuation of the Company's development, leasing and management services
business has been derived, in part, from a capitalization of the revenue
derived from the Company's contracts with third parties for real estate
development, leasing and management services. Upon consummation of the
Offering, the Company expects to provide through the Operating Partnership
leasing and management services, and through the Services Company third-party
development services.
 
  The consideration paid and the allocation of Units of the Operating
Partnership among the participants in connection with the Formation
Transactions were not determined by arm's-length negotiations. Since no
appraisals of the Properties and other assets were obtained, the value of the
Units allocated to participants in the Formation Transactions may exceed the
fair market value of their ownership of such Properties and assets. The terms
of the option agreements relating to the Excluded Properties also were not
determined by arm's-length negotiations, and such terms may be less favorable
to the Company than those that may have been obtained through negotiations
with a third party. In addition, approximately $34.8 million of mortgage
indebtedness guaranteed by certain members of the Kilroy Group, including
officers and directors of the Company, will be repaid in connection with the
Formation Transactions. See "--Conflicts of Interest," "Use of Proceeds" and
"Formation and Structure of the Company."
 
  REAL ESTATE INVESTMENT CONSIDERATIONS
 
  General. Real property investments are subject to varying degrees of risk.
The yields available from equity investments in real estate depend on the
amount of income earned and capital appreciation generated by the related
properties as well as the expenses incurred in connection therewith. If the
Properties do not generate income sufficient to meet operating expenses,
including debt service and capital expenditures, the ability to make
distributions to the Company's stockholders could be adversely affected.
Income from, and the value of, the Properties may be adversely affected by the
general economic climate, local conditions such as oversupply of office,
industrial or retail space or a reduction in demand for office, industrial or
retail space in the area, the attractiveness of the Properties to potential
tenants, competition from other office, industrial and retail buildings, and
the ability of the Company to provide adequate maintenance and insurance and
increased operating costs (including insurance premiums, utilities and real
estate taxes). In addition, revenues from properties and real estate values
are also affected by such factors as the cost of compliance with regulations
and the potential for liability under applicable laws, including changes in
tax laws, interest rate levels and the availability of financing. The
Company's income would be adversely affected if a significant number of
tenants were unable to pay rent or if office, industrial or retail space could
not be rented on favorable terms. Certain significant expenditures associated
with an investment in real estate (such as mortgage payments, real estate
taxes and maintenance costs) generally are not reduced when circumstances
cause a reduction in income from the investment.
 
  Illiquidity of Real Estate. Real estate investments are relatively illiquid
and, therefore, the Company has limited ability to vary its portfolio quickly
in response to changes in economic or other conditions. In addition, the
prohibition in the Code and related regulations on a REIT holding property for
sale may affect the Company's ability to sell properties without adversely
affecting distributions to the Company's stockholders.
 
  Competition. The Company plans to expand, primarily through the acquisition
and development of additional office and industrial buildings in Southern
California and other strategic markets. There are a number of office and
industrial building developers and real estate companies that compete with the
Company in seeking properties for acquisition, prospective tenants and land
for development. All of the Properties are in developed areas where there are
generally other properties of the same type. Competition from other office,
industrial and retail properties may affect the Company's ability to attract
and retain tenants, rental rates and expenses of operation (particularly in
light of the higher vacancy rates of many competing properties which may
result in lower-priced space being available in such properties). The Company
may be competing with other entities that have greater financial and other
resources than the Company.
 
  Lease Expirations. Certain leases expiring during the first several years
following the Offering are at rental rates higher than those attained by the
Company in its recent leasing activity. Such leases, or other leases of the
 
                                      20
<PAGE>
 
Company, may not be renewed or, if renewed, may be renewed at rental rates
lower than rental rates in effect immediately prior to expiration. Decreases
in the rental rates for the Company's properties, the failure of tenants to
renew any such leases or the failure of the Company to re-lease any of the
Company's space could materially adversely affect the Company and its ability
to make distributions. See "Business and Properties--Lease Expirations."
 
  Ground Leases. The Company's five Office Properties located at Kilroy
Airport Center in Long Beach are held subject to ground leases. A default by
the Company under the terms of a ground lease could result in the loss of
Properties located on the respective parcel, with the landowner becoming the
owner of such Properties unless the default under the lease is cured or
waived. In addition, upon expiration of the ground leases, including the
options thereon, there is no assurance that the Company will be able to
negotiate new ground leases at all or, if any leases were renewed, that they
will be on terms consistent with or more favorable than existing terms, which
may result in the loss of the Properties or increased rental expense to the
Company. The ground leases for the Kilroy Airport Center Long Beach (including
renewal options) will expire in 2084. See "Business and Properties--Office
Properties--Kilroy Long Beach."
 
  Capital Improvements. The Properties vary in age and require capital
improvements regularly. If the cost of improvements, whether required to
attract and retain tenants or to comply with governmental requirements,
substantially exceeds management's expectations, cash available for
distribution could be reduced.
 
  Risks of Real Estate Acquisition and Development. The Company intends to
actively seek to acquire office and industrial properties to the extent that
they can be acquired on advantageous terms and meet the Company's investment
criteria. Acquisitions of office and industrial properties entail risks that
investments will fail to perform in accordance with expectations. Estimates of
the costs of improvements to bring an acquired property up to standards
established for the market position intended for that property may prove
inaccurate. In addition, there are general investment risks associated with
any new real estate investment.
 
  In addition to the Development Properties, the Company will pursue other
development opportunities both for ownership by the Company and on a fee
basis. The real estate development business involves significant risks in
addition to those involved in the ownership and operation of established
office or industrial buildings, including the risks that financing may not be
available on favorable terms for development projects and construction may not
be completed on schedule or within budget, resulting in increased debt service
expense and construction costs and delays in leasing such properties and
generating cash flow. In addition, new development activities, regardless of
whether or not they are ultimately successful, typically require a substantial
portion of management's time and attention. Development activities are also
subject to risks relating to the inability to obtain, or delays in obtaining,
all necessary zoning, land-use, building, occupancy, and other required
governmental permits and authorizations.
 
  The Company anticipates that future acquisitions and developments will be
financed, in whole or in part, through additional equity offerings, lines of
credit and other forms of secured or unsecured financing. If new developments
are financed through construction loans, there is a risk that, upon completion
of construction, permanent financing for newly developed properties may not be
available or may be available only on disadvantageous terms. Equity, rather
than debt, financing of future acquisitions or developments could have a
dilutive effect on the interests of existing stockholders of the Company.
 
  While the Company has focused primarily on the development and ownership of
office and industrial properties, the Company plans in the future to develop
properties, part or all of which will be for retail use. In addition, while
the Company has historically limited its ownership of properties primarily to
the Southern California market, the Company has entered into an agreement
giving it the right to purchase office properties in the greater Seattle area
and it is possible that the Company will in the future expand its business to
this and other new geographic markets. See "Business and Properties--Excluded
Properties--SeaTac Office Center at Seattle-Tacoma International Airport." The
Company will not initially possess the same level of familiarity with new
types of commercial development or new markets, which could adversely affect
its ability to acquire or develop properties in any new localities or to
realize expected performance.
 
                                      21
<PAGE>
 
  Uninsured Loss. Management believes that the Properties are covered by
adequate comprehensive liability, rental loss and all-risk (at full
replacement cost) insurance provided by reputable companies and with
commercially reasonable deductibles, limits and policy specifications
customarily carried for similar properties. Certain types of losses, however,
may be either uninsurable or not economically insurable, such as losses due to
floods, riots or acts of war, or may be insured subject to certain limitations
including large deductibles or copayments, such as losses due to seismic
activity. See discussion of uninsured losses from seismic activity below.
Should an uninsured loss or a loss in excess of insured limits occur, the
Company could lose its investment in and anticipated profits and cash flow
from a property and would continue to be obligated on any mortgage
indebtedness or other obligations related to such property. Any such loss
would adversely affect the Company and its ability to make distributions.
 
  Uninsured Losses from Seismic Activity. The Properties are located in areas
that are subject to earthquake activity. Although the Company expects to have
earthquake insurance on a substantial portion of its Properties, should any
Property sustain damage as a result of an earthquake, or should losses exceed
the amount of such coverage, the Company may incur uninsured losses or losses
due to deductibles or co-payments on insured losses. See "Business and
Properties--Uninsured Losses from Seismic Activity."
 
  Risks Involved in Property Ownership Through Partnerships and Joint
Ventures. Although the Company will own fee simple interests in the Properties
(other than Kilroy Long Beach, which is held subject to long-term ground
leases), in the future the Company may also participate with other entities in
property ownership through joint ventures or partnerships. Partnership or
joint venture investments may, under certain circumstances, involve risks not
otherwise present, including the possibility that the Company's partners or
co-venturers might become bankrupt, that such partners or co-venturers might
at any time have economic or other business interests or goals which are
inconsistent with the business interests or goals of the Company, and that
such partners or co-venturers may be in a position to take action contrary to
the instructions or the requests of the Company or contrary to the Company's
policies or objectives, including the Company's policy with respect to
maintaining its qualification as a REIT. The Company will, however, seek to
maintain sufficient control of such partnerships or joint ventures to permit
the Company's business objectives to be achieved. There is no limitation under
the Company's organizational documents as to the amount of available funds
that may be invested in partnerships or joint ventures.
 
  REAL ESTATE FINANCING RISKS. The Company will be subject to the risks
normally associated with debt financing, including the risk that the Company's
cash flow will be insufficient to meet required payments of principal and
interest, the risk that indebtedness on the Properties will not be refinanced
at maturity or that the terms of such refinancing will not be as favorable as
the terms of such indebtedness. If the Company were unable to refinance its
indebtedness on acceptable terms, or at all, the Company might be forced to
dispose of one or more of the Properties upon disadvantageous terms, which
might result in losses to the Company and might adversely affect the cash
available for distribution. If prevailing interest rates or other factors at
the time of refinancing result in higher interest rates on refinancings, the
Company's interest expense would increase, which would adversely affect the
Company's cash flow and its ability to pay expected distributions to
stockholders. Further, if a Property is mortgaged to secure payment of
indebtedness and the Company is unable to meet mortgage payments, or is in
default under the related mortgage or deed of trust, such Property could be
transferred to the mortgagee, the mortgagee could foreclose upon the Property,
appoint a receiver and receive an assignment of rents and leases or pursue
other remedies, all with a consequent loss of income and asset value to the
Company. Foreclosures could also create taxable income without accompanying
cash proceeds, thereby hindering the Company's ability to meet the REIT
distribution requirements of the Code. See "The Financing."
 
  CONFLICTS OF INTEREST
 
  Tax Consequences Upon Sale or Refinancing. Unlike persons acquiring shares
of Common Stock in the Offering, holders of Units may suffer different and
more adverse tax consequences than the Company upon the sale or refinancing of
the Properties owned by the Operating Partnership, and therefore such holders
may have different objectives regarding the appropriate pricing and timing of
any sale or refinancing of such Properties.
 
                                      22
<PAGE>
 
While the Company, as the sole general partner of the Operating Partnership,
will have the authority as to whether and on what terms to sell or refinance
each Property owned solely by the Operating Partnership, those directors and
officers of the Company who hold Units may seek to influence the Company not
to sell or refinance the Properties, even though such a sale might otherwise
be financially advantageous to the Company, or may seek to influence the
Company to refinance a Property with a higher level of debt.
 
  Failure to Enforce Terms of Certain Agreements. As recipients of Units in
the Formation Transactions, certain directors and officers of the Company will
have a conflict of interest with respect to their obligations as directors or
officers of the Company to enforce the terms of the agreements relating to the
transfer to the Operating Partnership of their interests in the Partnerships
and other assets to be acquired by the Company and relating to the Company's
option to purchase certain additional properties owned by entities controlled
by certain officers and directors. See "Business and Properties--Development,
Leasing and Management Activities--Excluded Properties." The failure to
enforce the material terms of those agreements (which would require the
approval of the Independent Directors) could result in a monetary loss to the
Company, which loss could have a material effect on the Company's financial
condition or results of operations. While certain Continuing Investors will
provide indemnities in connection with such transfers, such indemnities would
be impaired to the extent that such Continuing Investors have other
obligations, including obligations for taxes arising from the Formation
Transactions or prior transactions, which they may not have sufficient assets
to satisfy.
 
  Policies with Respect to Conflicts of Interest. The Company has adopted
certain policies designed to eliminate or minimize conflicts of interest.
However, there can be no assurance that these policies always will be
successful in eliminating the influence of such conflicts, and, if they are
not successful, decisions could be made that might fail to reflect fully the
interests of all stockholders. See "Policies with Respect to Certain
Activities--Conflict of Interest Policies."
 
  Competitive Real Estate Activities of Management. John B. Kilroy, Sr. and
John B. Kilroy, Jr. will have controlling ownership interests in certain
properties which the Company has the option to acquire, including a complex of
three office properties which are located in the El Segundo submarket in which
four of the Office Properties and four of the Industrial Properties are
located and three office properties located at the SeaTac Office Center at the
Seattle-Tacoma International Airport. These properties will be managed by the
Operating Partnership and certain of the Company's officers, directors and
employees will spend an immaterial portion of their time and effort managing
these interests. In addition, John B. Kilroy, Sr. and John B. Kilroy, Jr. own
Calabasas Park Centre, an undeveloped approximately 66-acre site (representing
approximately 45 developable acres net of acreage required for streets and
contractually required open areas). The Kilroy Group is actively marketing all
but 18 acres for sale. Certain of the Company's officers, directors and
employees will spend an immaterial amount of time in connection with any sales
of such parcels.
 
  In addition, pursuant to the Omnibus Agreement and certain other option
agreements, the Company has the exclusive option to acquire the SeaTac Office
Center, the three office properties at a complex located on North Sepulveda
Boulevard in El Segundo described above and the approximately 18 acres
included in Calabasas Park Centre not currently held for sale. Each of these
properties is currently owned by partnerships controlled by John B. Kilroy,
Sr. and John B. Kilroy, Jr. The properties located at the SeaTac Office Center
and on North Sepulveda Boulevard in El Segundo will be managed by the
Operating Partnership pursuant to a management agreement on market terms. With
respect to Calabasas Park Centre, the officers, directors and employees of the
Company will spend an immaterial amount of time in connection with the
entitlement, marketing and sales of such parcels. The implementation of the
arrangements relating to each of these properties will involve a conflict of
interest with John B. Kilroy, Sr. and John B. Kilroy, Jr. The Kilroy Group
holds certain other real estate interests which are not being contributed to
the Company as part of the Formation Transactions. All of such other real
estate interests relate to miscellaneous properties and property rights that
the Company believes are not of a type appropriate for inclusion in the
Company's portfolio and the properties are not consistent with the Company's
strategy. See "Business and Properties--Excluded Properties."
 
 
                                      23
<PAGE>
 
  ADVERSE CONSEQUENCES OF FAILURE TO QUALIFY AS A REIT
 
  Tax Liabilities as a Consequence of Failure to Qualify as a REIT. The
Company intends to operate so as to qualify as a REIT under the Code,
commencing with its taxable year ending December 31, 1996. Although management
believes that it will be organized and will operate in such a manner, no
assurance can be given that the Company will be organized or will be able to
operate in a manner so as to qualify or remain so qualified. Qualification as
a REIT involves the satisfaction of numerous requirements (some on an annual
and others on a quarterly basis) established under highly technical and
complex Code provisions for which there are only limited judicial and
administrative interpretations, and involves the determination of various
factual matters and circumstances not entirely within the Company's control.
For example, in order to qualify as a REIT, at least 95% of the Company's
gross income in any year must be derived from qualifying sources and the
Company must pay distributions to stockholders aggregating annually at least
95% of its REIT taxable income (determined without regard to the dividends
paid deduction and by excluding net capital gains). The complexity of these
provisions and of the applicable Treasury Regulations that have been
promulgated under the Code is greater in the case of a REIT that holds its
assets in partnership form. No assurance can be given that legislation, new
regulations, administrative interpretations or court decisions will not
significantly change the tax laws with respect to qualification as a REIT or
the federal income tax consequences of such qualification. The Company is
relying on the opinion of Latham & Watkins, tax counsel to the Company,
regarding various issues affecting the Company's ability to qualify, and
continue to qualify, as a REIT. See "Federal Income Tax Consequences--Taxation
of the Company" and "Legal Matters." Such legal opinion is based on various
assumptions and factual representations by the Company regarding the Company's
ability to meet the various requirements for qualification as a REIT, and no
assurance can be given that actual operating results will meet these
requirements. Such legal opinion is not binding on the Internal Revenue
Service ("IRS") or any court.
 
  Among the requirements for REIT qualification is that the value of any one
issuer's securities held by a REIT may not exceed 5% of the REIT's total
assets on certain testing dates. See "Federal Income Tax Consequences--
Taxation of the Company--Requirements for Qualification." The Company believes
that the aggregate value of the securities of the Services Company to be held
by the Company will be less than 5% of the value of the Company's total
assets, based on the initial allocation of Units among participants in the
Formation Transactions and the Company's opinion regarding the maximum value
that could be assigned to the expected assets and net operating income of the
Services Company after the Offering. In rendering its opinion as to the
qualification of the Company as a REIT, Latham & Watkins is relying on the
conclusions of the Company regarding the value of the Services Company.
 
  If the Company were to fail to qualify as a REIT in any taxable year, the
Company would be subject to federal income tax (including any applicable
alternative minimum tax) on its taxable income at regular corporate rates and
would not be allowed a deduction in computing its taxable income for amounts
distributed to its stockholders. Moreover, unless entitled to relief under
certain statutory provisions, the Company also would be disqualified from
treatment as a REIT for the four taxable years following the year during which
qualification is lost. This treatment would reduce the net earnings of the
Company available for investment or distribution to stockholders because of
the additional tax liability to the Company for the years involved. In
addition, distributions to stockholders would no longer be required to be
made. See "Federal Income Tax Consequences--Taxation of the Company--
Requirements for Qualification."
 
  Other Tax Liabilities. Even if the Company qualifies for and maintains its
REIT status, it will be subject to certain federal, state and local taxes on
its income and property. For example, if the Company has net income from a
prohibited transaction, such income will be subject to a 100% tax. In
addition, the Company's net income, if any, from the third-party development
conducted through the Services Company will be subject to federal income tax
at regular corporate tax rates. See "Federal Income Tax Consequences--Services
Company."
 
  ADVERSE CONSEQUENCES OF FAILURE OF THE OPERATING PARTNERSHIP TO QUALIFY AS A
PARTNERSHIP FOR FEDERAL INCOME TAX PURPOSES. The Company will receive an
opinion of Latham & Watkins, tax counsel to the Company, at the closing of the
Formation Transactions to the effect that the Operating Partnership is
properly
 
                                      24
<PAGE>
 
treated as a partnership for federal income tax purposes. Such opinion is not
binding on the IRS or the courts. If the IRS were to successfully challenge
the tax status of the Operating Partnership as a partnership for federal
income tax purposes, the Operating Partnership would be treated as an
association taxable as a corporation. In such event, the character of the
Company's assets and income would change, which would preclude the Company
from satisfying the asset tests and possibly the income tests (as imposed by
the REIT provisions of the Code) and, in turn, would prevent the Company from
qualifying as a REIT. The imposition of a corporate tax on the Operating
Partnership, combined with the loss of REIT status of the Company, would also
materially adversely affect the amount of cash available for distribution to
the Company and its stockholders. See "Federal Income Tax Consequences--Tax
Aspects of the Operating Partnership--Entity Classification."
 
  CHANGES IN INVESTMENT AND FINANCING POLICIES WITHOUT STOCKHOLDER
VOTE. Subject to the Company's fundamental investment policy to maintain its
qualification as a REIT (unless a change is approved by the Company's Board of
Directors and stockholders), the Company's Board of Directors will determine
its investment and financing policies, its growth strategy, and its debt,
capitalization, distribution and operating policies. Although the Board of
Directors has no present intention to revise or amend these strategies and
policies, the Board of Directors may do so at any time without a vote of the
Company's stockholders. See "Policies With Respect to Certain Activities--
Other Policies." Accordingly, stockholders will have no control over changes
in strategies and policies of the Company, and such changes may not serve the
interests of all stockholders and could adversely affect the Company's
financial condition or results of operations, including its ability to
distribute cash to stockholders.
 
  Issuance of Additional Securities. The Company has authority to offer its
Common Stock or other equity or debt securities in exchange for property or
otherwise. Similarly, the Company may cause the Operating Partnership to offer
additional Units or preferred units of the Operating Partnership, including
offers in exchange for property to sellers who seek to defer certain of the
tax consequences relating to a property transfer. Existing stockholders will
have no preemptive right to acquire any such securities, and any such issuance
of equity securities could result in dilution in an existing stockholder's
investment in the Company.
 
  Risks Involved in Acquisitions Through Partnerships or Joint Ventures. The
Company may invest in office and industrial properties through partnerships or
joint ventures instead of purchasing such properties directly or through
wholly-owned subsidiaries. Partnership or joint venture investments may, under
certain circumstances, involve risks not otherwise present in a direct
acquisition of properties. These include the risk that the Company's co-
venturer or partner in an investment might become bankrupt; a co-venturer or
partner might at any time have economic or business interests or goals which
are inconsistent with the business interests or goals of the Company and a co-
venturer or partner might be in a position to take action contrary to the
instructions or the requests of the Company or contrary to the Company's
policies or objectives.
 
  Risks Involved in Investments in Securities Related to Real Estate. The
Company may pursue its investment objectives through the ownership of
securities of entities engaged in the ownership of real estate. Ownership of
such securities may not entitle the Company to control the ownership,
operation and management of the underlying real estate. In addition, the
Company may have no ability to control the distributions with respect to such
securities, which may adversely affect the Company's ability to make required
distributions to stockholders. Furthermore, if the Company desires to control
an issuer of securities, it may be prevented from doing so by the limitations
on percentage ownership and gross income tests which must be satisfied by the
Company in order for the Company to qualify as a REIT. See "Federal Income Tax
Consequences--Taxation of the Company--Requirements for Qualification as a
REIT." The Company intends to operate its business in a manner that will not
require the Company to register under the Investment Company Act of 1940 and
stockholders will therefore not have the protection of that Act.
 
  The Company may also invest in mortgages, and may do so as a strategy for
ultimately acquiring the underlying property. In general, investments in
mortgages include the risk that borrowers may not be able to make debt service
payments or pay principal when due, the risk that the value of the mortgaged
property may be less than the principal amount of the mortgage note securing
such property and the risk that interest rates payable
 
                                      25
<PAGE>
 
on the mortgages may be lower than the Company's cost of funds to acquire
these mortgages. In any of these events, Funds from Operations and the
Company's ability to make required distributions to stockholders could be
adversely affected.
 
  LIMITS ON OWNERSHIP AND CHANGE IN CONTROL. Certain provisions of the
Maryland General Corporation Law (the "MGCL") and the Company's Articles of
Incorporation and Bylaws, and certain provisions of the Operating
Partnership's partnership agreement, could have the effect of delaying,
deferring or preventing a change in control of the Company or the removal of
existing management and, as a result, could prevent the stockholders of the
Company from being paid a premium for their shares of Common Stock over then
prevailing market prices.
 
  Limits on Ownership of Common Stock; Staggered Board; Capital Stock; Voting
Rights. In order for the Company to maintain its qualification as a REIT, not
more than 50% in value of the outstanding shares of its capital stock may be
owned, actually or constructively, by five or fewer individuals (as defined in
the Code to include certain entities) during the last half of a taxable year
(other than the first year for which the election to be treated as a REIT has
been made). Furthermore, after the first taxable year for which a REIT
election is made, the Company's shares must be held by a minimum of 100
persons for at least 335 days of a 12-month taxable year (or a proportionate
part of a short tax year). In addition, if the Company, or an owner of 10% or
more of the Company, actually or constructively, owns 10% or more of a tenant
of the Company (or a tenant of any partnership in which the Company is a
partner), the rent received by the Company (either directly or through any
such partnership) from such tenant will not be qualifying income for purposes
of the REIT gross income tests of the Code. See "Federal Income Tax
Consequences--Taxation of the Company." In order to protect the Company
against the risk of losing REIT status due to a concentration of ownership
among its stockholders, the Articles of Incorporation of the Company limit
actual or constructive ownership of the outstanding shares of Common Stock by
any single stockholder to 8% (the "Ownership Limit") of the then outstanding
shares of Common Stock. See "Description of Capital Stock--Restrictions on
Ownership and Transfer." Although the Board of Directors presently has no
intention of doing so (except as described below), the Board of Directors will
consider waiving the Ownership Limit with respect to a particular stockholder
if it is satisfied, based upon the advice of tax counsel or otherwise, that
ownership by such stockholder in excess of the Ownership Limit would not
jeopardize the Company's status as a REIT and the Board of Directors otherwise
decided such action would be in the best interests of the Company. The Board
of Directors has waived the Ownership Limit with respect to John B. Kilroy,
Sr., John B. Kilroy, Jr., members of their families and certain affiliated
entities and has permitted such individuals and entities to actually or
constructively own, in the aggregate, up to 17% of the outstanding Common
Stock. The Articles of Incorporation provide that any of John B. Kilroy, Sr.,
John B. Kilroy, Jr., members of their families and certain affiliates may
acquire Common Stock pursuant to their rights to exchange Units for shares of
Common Stock, subject to certain restrictions, or from other sources, but may
not acquire Common Stock such that such individuals or affiliates would
actually or constructively own in the aggregate Common Stock in excess of 17%
of the then outstanding Common Stock.
 
  Actual or constructive ownership of shares of Common Stock in excess of the
Ownership Limit, or, with the consent of the Board of Directors, such other
limit, will cause the violative transfer or ownership to be void with respect
to the transferee or owner as to that number of shares in excess of the
Ownership Limit, or, with the consent of the Board of Directors, such other
limit, as applicable, and such shares will be automatically transferred to a
trust for the benefit of a qualified charitable organization. Such purported
transferee or owner shall have no right to vote such shares or be entitled to
dividends or other distributions with respect to such shares. See "Description
of Capital Stock--Restrictions on Ownership and Transfer" for additional
information regarding the Ownership Limit.
 
  Following the consummation of the Offering, the Board of Directors of the
Company will be divided into three classes serving staggered three-year terms.
The terms of the first, second and third classes will expire in 1997, 1998 and
1999, respectively. Directors for each class will be chosen for a three-year
term upon the expiration of the current class' term, beginning in 1997. In
addition, the Articles of Incorporation authorize the Board of Directors to
issue up to 150,000,000 shares of Common Stock and 30,000,000 shares of
preferred stock and to establish the rights and preferences of any shares of
preferred stock issued. No shares of preferred stock
 
                                      26
<PAGE>
 
will be issued or outstanding at the consummation of the Offering. See
"Description of Capital Stock--Preferred Stock." Under the Articles of
Incorporation, stockholders do not have cumulative voting rights.
 
  The Ownership Limit, the staggered terms for directors, the issuance of
additional common or preferred stock in the future and the absence of
cumulative voting rights could have the effect of (i) delaying or preventing a
change of control of the Company even if a change of control were in the
stockholders' interest, (ii) deterring tender offers for the Common Stock that
may be beneficial to the stockholders, or (iii) limiting the opportunity for
stockholders to receive a premium for their Common Stock that might otherwise
exist if an investor attempted to assemble a block of shares of Common Stock
in excess of the Ownership Limit or otherwise to effect a change of control of
the Company. See "Management" and "Description of Capital Stock."
 
  Maryland Business Combination Statute. Under the MGCL, certain "business
combinations" (including certain issuances of equity securities) between a
Maryland corporation and any person who beneficially owns, directly or
indirectly, 10% or more of the voting power of the corporation's voting shares
(an "Interested Stockholder") are prohibited for five years after the date on
which the Interested Stockholder became an Interested Stockholder. Thereafter,
any such business combination must be approved by two super-majority
stockholder votes unless, among other things, the holders of the Common Stock
receive a minimum price (as defined in the MGCL) for their Common Stock and
the consideration is received in cash or in the same form as previously paid
by the Interested Stockholder for its Common Stock. These provisions of the
MGCL could have the effect of delaying or preventing a change of control of
the Company or other transactions even if it were in the interest of some, or
a majority, of the Company's stockholders. As permitted by the MGCL, the
Company has exempted any "business combinations" involving the members of the
Kilroy Group and their affiliates and associates, present or future, or any
other person acting in concert or as a group with any of the foregoing persons
and, consequently, the five year prohibition and the super-majority vote
requirements will not apply to "business combinations" between any of them and
the Company. As a result, members of the Kilroy Group, any present or future
affiliate or associate thereof or any other person acting in concert or as a
group with any of the foregoing persons may be able to enter into "business
combinations" with the Company, which may or may not be in the best interest
of the stockholders. See "Certain Provisions of Maryland Law and of the
Company's Articles of Incorporation and Bylaws--Business Combinations."
 
  Maryland Control Share Acquisition. Maryland law provides that "control
shares" of the Company acquired in a "control share acquisition" have no
voting rights except to the extent approved by a vote of two-thirds of the
votes entitled to be cast on the matter, excluding shares owned by the
acquiror or by officers or directors who are employees of the Company.
"Control shares" are voting shares of stock which, if aggregated with all
other such shares of stock previously acquired by the acquiror, or in respect
of which the acquiror is able to exercise or direct the exercise of voting
power (except solely by revocable proxy), would entitle the acquiror to
exercise voting power in electing directors within one of the following ranges
of voting power: (i) one-fifth or more but less than one-third; (ii) one-third
or more but less than a majority; or (iii) a majority of all voting power.
"Control shares" do not include shares of stock the acquiring person is then
entitled to vote as a result of having previously obtained stockholder
approval. A "control share acquisition" means the acquisition of control
shares, subject to certain exceptions. The control share acquisition statute
does not apply to shares acquired in a merger, consolidation or share exchange
if the Company is a party to the transaction or to acquisitions approved or
exempted by the Company's Articles of Incorporation or Bylaws. As permitted by
the MGCL, the Company has exempted control share acquisitions involving any of
the members of the Kilroy Group, their affiliates and associates, directors,
officers and employees of the Company, and any other person approved by the
Board of Directors in its sole discretion. As a result, any of the members of
the Kilroy Group, their affiliates and associates, directors, officers and
employees of the Company, and any person approved by the Board of Directors in
its sole discretion may be able to effect a control share acquisition of the
Company, which may or may not be in the best interest of the stockholders. See
"Certain Provisions of Maryland Law and of the Company's Articles of
Incorporation and Bylaws--Control Share Acquisitions."
 
                                      27
<PAGE>
 
  RISKS OF DEVELOPMENT BUSINESS AND RELATED ACTIVITIES BEING CONDUCTED BY THE
  SERVICES COMPANY; CONTROL OF THE SERVICES COMPANY
 
  Tax Liabilities. The Services Company will be subject to federal and state
income tax on its taxable income at regular corporate rates. Any federal,
state or local income taxes that the Services Company is required to pay will
reduce the cash available for distribution by the Company to its stockholders.
 
  Adverse Consequences of Lack of Control Over the Businesses of the Services
Company. To comply with the REIT asset tests that restrict ownership of shares
of other corporations, upon consummation of the Offering, the Operating
Partnership will own 100% of the non-voting preferred stock of the Services
Company (representing approximately 95% of its economic value) and John B.
Kilroy, Sr. and John B. Kilroy, Jr. will own all the outstanding voting common
stock of the Services Company (representing approximately 5% of its economic
value). This ownership structure is necessary to permit the Company to share
in the income of the Services Company and also maintain its status as a REIT.
Although it is anticipated that the Company will receive substantially all of
the economic benefit of the businesses carried on by the Services Company
through the Company's right to receive dividends through the Operating
Partnership, the Company will not be able to elect directors or officers of
the Services Company and, therefore, the Company will not have the ability to
influence the operations of the Services Company. As a result, the board of
directors and management of the Services Company may implement business
policies or decisions that would not have been implemented by persons
controlled by the Company and that are adverse to the interests of the Company
or that lead to adverse financial results, which could adversely impact the
Company's net operating income and cash flow. See "Formation and Structure of
the Company."
 
  Adverse Consequence of REIT Status on the Businesses of the Services
Company. Certain requirements for REIT qualification may in the future limit
the Company's ability to receive increased distributions from the fee
development operations conducted and related services offered by the Services
Company. See "--Adverse Consequences of Failure to Qualify as a REIT."
 
  DEPENDENCE ON KEY PERSONNEL. The Company is dependent on the efforts of its
executive officers and directors, particularly John B. Kilroy, Sr., the
Company's Chairman of the Board, and John B. Kilroy, Jr., the Company's
President and Chief Executive Officer, for strategic business direction and
experience in the Southern California real estate market. While the Company
believes that it could find replacements for these key personnel, the loss of
their services could have an adverse effect on the operations of the Company.
The Company has entered into employment agreements with John B. Kilroy, Jr.
and Jeffrey C. Hawken. See "Management--Employment Agreements."
 
  DISTRIBUTION PAYOUT PERCENTAGE. The Company's expected annual distributions
for the 12 months following consummation of the Offering of $1.60 per share
are expected to be approximately 90.4% of estimated cash available for
distribution. If cash available for distribution generated by the Company's
assets for such 12-month period is less than the Company's estimate, or if
such cash available for distribution decreases in future periods from expected
levels, the Company's ability to make the expected distributions would be
adversely affected. Any such failure to make expected distributions could
result in a decrease in the market price of the Common Stock. See
"Distribution Policy."
 
  HISTORICAL OPERATING LOSSES OF THE OFFICE AND INDUSTRIAL
PROPERTIES. Although the Office and Industrial Properties developed by the
Company after their construction and initial lease-up periods have
historically generated positive net cash flow, the effect of depreciation,
amortization and other non-cash charges of the Company has resulted in net
losses for financial reporting purposes in each of the last five fiscal years.
Historical operating results of the Office and Industrial Properties may not
be comparable to future operating results of the Company because, prior to the
completion of the Offering and the Formation Transactions, the Office and
Industrial Properties were encumbered with greater levels of debt (which has
the effect of reducing net income) than that with which the Company intends to
operate. In addition, the historical results of operations do not reflect the
acquisition and development of the any of the Acquisition Properties or the
Development Properties.
 
                                      28
<PAGE>
 
See "Management's Discussion and Analysis of Financial Condition and Results
of Operations." However, there can be no assurance that the Company will
acquire and successfully develop any of the Development Properties, and, even
if such Properties are acquired and successfully developed, that they will not
experience losses in the future.
 
  NO LIMITATION ON DEBT. The Board of Directors currently intends to fund
acquisition opportunities and development partially through short-term
borrowings, as well as out of undistributed cash available for distribution
and other available cash. The Board of Directors expects to refinance projects
purchased or developed with short-term debt either with long-term indebtedness
or equity financing depending upon the economic conditions at the time of
refinancing. Upon completion of the Offering and the Formation Transactions,
the debt to total market capitalization ratio of the Company will be
approximately 25.6% (assuming an initial public offering price of $20.00 per
share of Common Stock). The Board of Directors has adopted a policy of
limiting its indebtedness to approximately 50% of its total market
capitalization (i.e., the market value of the issued and outstanding shares of
Common Stock, including interests exchangeable therefor, plus total debt), but
the organizational documents of the Company do not contain any limitation on
the amount or percentage of indebtedness, funded or otherwise, that the
Company may incur. The Board of Directors, without the vote of the Company's
stockholders, could alter or eliminate its current policy on borrowing at any
time at its discretion. If this policy were changed, the Company could become
more highly leveraged, resulting in an increase in debt service that could
adversely affect the Company's cash flow and its ability to make expected
distributions to its stockholders and an increased risk of default on the
Company's obligations. See "Policies With Respect to Certain Activities--
Financing."
 
  The Company has established its debt policy relative to the market
capitalization of the Company rather than to the book value of its assets, a
ratio that is frequently employed. The Company has used total market
capitalization because it believes that the book value of its assets (which to
a large extent is the depreciated value of real property, the Company's
primary tangible asset) does not accurately reflect its ability to borrow and
to meet debt service requirements. The total market capitalization of the
Company, however, is more variable than book value, and does not necessarily
reflect the fair market value of the underlying assets of the Company at all
times. Although the Company will consider factors other than total market
capitalization in making decisions regarding the incurrence of indebtedness
(such as the purchase price of properties to be acquired with debt financing,
the estimated market value of such properties upon refinancing and the ability
of particular properties and the Company as a whole to generate cash flow to
cover expected debt service), there can be no assurance that the ratio of
indebtedness to total market capitalization (or to any other measure of asset
value) will be consistent with the expected level of distributions to the
Company's stockholders.
 
  GOVERNMENT REGULATIONS. Many laws and governmental regulations are
applicable to the Properties and changes in these laws and regulations, or
their interpretation by agencies and the courts, occur frequently.
 
  Costs of Compliance with Americans with Disabilities Act. Under the
Americans with Disabilities Act of 1990 (the "ADA"), all places of public
accommodation, effective beginning in 1992, are required to meet certain
federal requirements related to access and use by disabled persons. Compliance
with the ADA might require removal of structural barriers to handicapped
access in certain public areas where such removal is "readily achievable."
Noncompliance with the ADA could result in the imposition of fines or an award
of damages to private litigants. The impact of application of the ADA to the
Company's properties, including the extent and timing of required renovations,
is uncertain. If required changes involve a greater amount of expenditures
than the Company currently anticipates or if the changes must be made on a
more accelerated schedule than the Company currently anticipates, the
Company's ability to make expected distributions to stockholders could be
adversely affected.
 
  Environmental Matters. Under various federal, state and local laws,
ordinances and regulations relating to the protection of the environment, an
owner or operator of real estate may be held liable for the costs of removal
or remediation of certain hazardous or toxic substances located on or in the
property. These laws often impose liability without regard to whether the
owner was responsible for, or even knew of, the presence of such
 
                                      29
<PAGE>
 
hazardous or toxic substances. The costs of investigation, removal or
remediation of such substances may be substantial, and the presence of such
substances may adversely affect the owner's ability to rent or sell the
property or to borrow using such property as collateral and may expose it to
liability resulting from any release of or exposure to such substances.
Persons who arrange for the disposal or treatment of hazardous or toxic
substances at another location may also be liable for the costs of removal or
remediation of such substances at the disposal or treatment facility, whether
or not such facility is owned or operated by such person. Certain
environmental laws impose liability for release of asbestos-containing
materials into the air, and third parties may also seek recovery from owners
or operators of real properties for personal injury associated with asbestos-
containing materials and other hazardous or toxic substances. In connection
with the ownership (direct or indirect), operation, management and development
of real properties, the Company may be considered an owner or operator of such
properties or as having arranged for the disposal or treatment of hazardous or
toxic substances and, therefore, potentially liable for removal or remediation
costs, as well as certain other related costs, including governmental
penalties and injuries to persons and property.
 
  The Company believes that the Properties are in compliance in all material
respects with all federal, state and local laws, ordinances and regulations
regarding hazardous or toxic substances or petroleum products. The Company has
not been notified by any governmental authority, and is not otherwise aware,
of any material noncompliance, liability or claim relating to hazardous or
toxic substances or petroleum products in connection with any of its present
properties.
 
  All of the Properties were subject to Phase I or similar environmental
assessments by independent environmental consultants in connection with the
formation of the Company. Phase I assessments are intended to discover
information regarding, and to evaluate the environmental condition of, the
surveyed property and surrounding properties. Phase I assessments generally
include an historical review, a public records review, an investigation of the
surveyed site and surrounding properties, and preparation and issuance of a
written report, but do not include soil sampling or subsurface investigations.
The Company's environmental assessments of the Properties have not revealed
any environmental liability that the Company believes would have a material
adverse effect on the Company's business, assets or results of operations
taken as a whole, nor is the Company aware of any such material environmental
liability. Nonetheless, it is possible that the Company's assessments do not
reveal all environmental liabilities or that there are material environmental
liabilities of which the Company is unaware. Moreover, there can be no
assurance that (i) future laws, ordinances or regulations will not impose any
material environmental liability or (ii) the current environmental condition
of the Properties will not be affected by tenants, by the condition of land or
operations in the vicinity of the Properties (such as the presence of
underground storage tanks), or by third parties unrelated to the Company. If
compliance with the various laws and regulations, now existing or hereafter
adopted, exceeds the Company's budgets for such items, the Company's ability
to make expected distributions to stockholders could be adversely affected.
 
  Other Regulations. The Properties are also subject to various federal, state
and local regulatory requirements such as state and local fire and life safety
requirements. Failure to comply with these requirements could result in the
imposition of fines by governmental authorities or awards of damages to
private litigants. The Company believes that the Properties are currently in
compliance with all such regulatory requirements. However, there can be no
assurance that these requirements will not be changed or that new requirements
will not be imposed which would require significant unanticipated expenditures
by the Company and could have an adverse effect on the Company's Funds from
Operations and expected distributions.
 
  The City of Los Angeles has enacted certain regulations relating to the
repair of welded steel moment frame buildings located in certain areas damaged
as a result of the Southern California Northridge earthquake on January 17,
1994. Such regulations do not apply to the Properties. There can be no
assurance, however, that similar regulations will not be adopted by
governmental agencies with the ability to regulate the Properties or that
other requirements affecting the Properties will not be imposed which would
require significant unanticipated expenditures by the Company and could have
an adverse effect on the Company's Funds from Operations and cash available
for distribution. The Company believes, based in part on recent engineering
reports, that its Properties are in good condition. See "Business and
Properties--Uninsured Losses from Seismic Activity."
 
                                      30
<PAGE>
 
  IMMEDIATE AND SUBSTANTIAL DILUTION. As set forth more fully under
"Dilution," as of June 30, 1996, the Properties to be contributed by the
Kilroy Group in exchange for Units in the Operating Partnership had a pro
forma net tangible book value for financial reporting purposes of
approximately $62.5 million, or $6.75 per share of Common Stock. As a result,
the pro forma net book value per share of Common Stock of the Company after
the consummation of the Offering and the Formation Transactions will be less
than the assumed initial public offering price of $20.00 per share. The
purchasers of Common Stock offered hereby will experience immediate and
substantial dilution of $13.25 per share of Common Stock (based on the assumed
initial public offering price) in the net tangible book value of the shares of
Common Stock. See "Dilution."
 
  NO PRIOR PUBLIC MARKET. Prior to the Offering, there has been no public
market for the Common Stock, and there can be no assurance that an active
trading market will develop as a result of the Offering or, if a trading
market does develop, that it will be sustained or that the shares of Common
Stock will be resold at or above the initial public offering price. The market
for equity securities can be volatile and the trading price of the Common
Stock could be subject to wide fluctuations in response to operating results,
news announcements, trading volume, general market trends, changes in interest
rates and other factors. Moreover, numerous other factors, such as
governmental regulatory action and changes in tax laws, could have a
significant impact on the future market price of the Common Stock. The initial
public offering price of the Common Stock offered hereby will be determined
through negotiations between the Company and the representatives (the
"Representatives") of the Underwriters. Among the factors to be considered in
such negotiations, in addition to prevailing market conditions, will be
distribution rates and Funds from Operations of publicly traded REITs that the
Company and the Representatives believe to be comparable to the Company,
estimates of the business potential and earnings prospects of the Company, and
the current state of the Company's industry and the economy as a whole. The
assumed initial public offering price does not necessarily bear any
relationship to the Company's book value, assets, financial condition or any
other established criteria of value and may not be indicative of the market
price for the Common Stock after the Offering. See "Underwriting."
 
  EFFECT OF MARKET INTEREST RATES ON PRICE OF COMMON STOCK. One of the factors
that will influence the market price of the Common Stock in public markets
will be the annual yield on the price paid for shares from distributions by
the Company. An increase in prevailing market interest rates on fixed income
securities may lead prospective purchasers of the Common Stock to demand a
higher annual yield from future distributions. Such an increase in the
required yield from distributions may adversely affect the market price of the
Common Stock.
 
  SHARES AVAILABLE FOR FUTURE SALE. No prediction can be made as to the
effect, if any, that future sales of shares, or the availability of shares for
future sale, will have on the market price of the Common Stock. Sales of
substantial amounts of shares of Common Stock in the public market (or upon
exchange of Units) or the perception that such sales might occur could
adversely affect the market price of the shares of Common Stock.
 
  Upon the consummation of the Offering and the Formation Transactions, the
Company will have outstanding 9,260,000 shares of Common Stock (10,649,000
shares if the Underwriters' over-allotment option is exercised in full), all
of which will be freely tradeable in the public market by persons other than
"affiliates" of the Company without restriction or registration under the
Securities Act. All of the shares of Common Stock that are issuable upon the
redemption of Units will be deemed to be "restricted securities" within the
meaning of Rule 144 under the Securities Act and may not be transferred unless
registered under the Securities Act or an exemption from registration is
available, including any exemption from registration provided under Rule 144
of the Securities Act. In general, upon satisfaction of certain conditions,
Rule 144 of the Securities Act permits the sale of certain amounts of
restricted securities two years following the date of acquisition of the
restricted securities from the Company and, after three years, permits
unlimited sales by persons unaffiliated with the Company.
 
  It is expected that the Operating Partnership will issue an aggregate of
1,653,835 Units to executive officers, directors and other Continuing
Investors in connection with the formation of the Company which, after two
years following the receipt of such Units, may be redeemed by the Operating
Partnership at the request of the holders
 
                                      31
<PAGE>
 
for cash (based on the fair market value of an equivalent number of shares of
Common Stock at the time of such redemption) or, at the Company's option,
exchanged for an equal number of shares of Common Stock, subject to certain
antidilution adjustments and the obligation of certain of the Continuing
Investors to indemnify the Company in connection with the Formation
Transactions. See "Formation and Structure of the Company--Allocation of
Consideration in the Formation Transactions." However, if the Company does not
elect to exchange such Units for shares, a Continuing Investor that is a
corporation or a limited liability company may require the Company to issue
shares of Common Stock in lieu of cash, subject to the Ownership Limit or,
with the consent of the Board of Directors, such other limit which does not
result in the failure of the Company to qualify as a REIT. See "Formation and
Structure of the Company" and "Shares Available for Future Sale--Redemption
Rights/Exchange Rights/Registration Rights." It is expected that immediately
after the Offering the Company will grant options to purchase an aggregate of
approximately 430,000 shares of Common Stock at the initial public offering
price to certain directors, officers and employees of the Company and an
additional approximately 570,000 shares of Common Stock will be reserved for
issuance upon the exercise of options granted under the Stock Incentive Plan.
See "Management--Stock Incentive Plan." In addition, the Company may issue
from time to time additional shares of Common Stock or Units in connection
with the acquisition of properties, including the possible issuance of Units
upon the exercise of options to acquire the Excluded Properties. See "The
Company--Growth Strategies" and "Business and Properties--Development,
Management and Leasing Activities--Excluded Properties." The Company has
agreed to file and generally keep continuously effective beginning two years
after the completion of the Offering a registration statement covering the
issuance of shares upon the exchange of Units and the resale thereof. See
"Shares Available for Future Sale." The Company also anticipates that it will
file a registration statement with respect to the shares of Common Stock
issuable under the Stock Incentive Plan following the consummation of the
Offering. Such registration statements generally will allow shares of Common
Stock issuable upon exchange of Units or the exercise of options to be
transferred or resold without restriction under the Securities Act.
 
  In addition to the limits placed on the sale of shares of Common Stock by
operation of Rule 144 and other provisions of the Securities Act, (i) each of
the Continuing Investors has agreed not to, directly or indirectly, offer,
sell, offer to sell, contract to sell, pledge, grant any option to purchase or
otherwise sell or dispose (or announce any offer, sale, offer to sell,
contract of sale, pledge, grant of any option to purchase or other sale or
disposition) of any Units or shares of Common Stock or other capital stock of
the Company, or any securities convertible or exercisable or exchangeable for
any Units or shares of Common Stock or other capital stock of the Company for
a period of two years from the date of this Prospectus, and (ii) the Company
has agreed not to offer, sell, offer to sell, contract to sell, pledge, grant
any option to purchase or otherwise sell or dispose (or announce any offer,
sale, offer of sale, contract of sale, pledge, grant of any option to purchase
or other sale or disposition) of any (other than pursuant to the Stock
Incentive Plan) shares of Common Stock or other capital stock of the Company,
or any securities convertible or exercisable or exchangeable for any Units or
shares of Common Stock or other capital stock of the Company, for a period of
one year from the date of this Prospectus, in each case without the prior
written consent of Prudential Securities Incorporated, on behalf of the
Underwriters, subject to certain limited exceptions. At the conclusion of the
two-year period referenced in clause (i) above, Common Stock issued upon the
subsequent exchange of Units may be sold in the public market pursuant to the
registration rights described above. Notwithstanding the foregoing, the Units
received by certain of the Continuing Investors in connection with the
Formation Transactions will be pledged to secure their indemnification
obligations pursuant to an agreement with the Company. See "Formation and
Structure of the Company." Future sales of the shares of Common Stock
described above could have an adverse effect on the market price of the shares
of Common Stock and the existence of Units, options, shares of Common Stock
reserved for issuance upon exchange of Units and the exercise of options and
registration rights referred to above may adversely affect the terms upon
which the Company may be able to obtain additional capital through the sale of
equity securities. See "Shares Available for Future Sale" and "Underwriting."
Such sales may be increased or accelerated to the extent that the Continuing
Investors have personal obligations, including obligations for taxes, which
may arise as a result of the Formation Transactions or prior transactions.
 
 
                                      32
<PAGE>
 
                                  THE COMPANY
 
GENERAL
 
  The Company has been formed to succeed to the business of the Kilroy Group
consisting principally of a portfolio of Class A suburban office and
industrial buildings in prime locations primarily in Southern California, and
the Kilroy Group's real estate ownership, acquisition, development, leasing
and management businesses. Upon the consummation of the Offering and the
Formation Transactions, the Company (through the Operating Partnership) will
own ten Office Properties encompassing an aggregate of approximately 1.5
million rentable square feet and nine Industrial Properties encompassing an
aggregate of approximately 900,000 rentable square feet. All of the Office
Properties and eight of the nine Industrial Properties are located in prime
Southern California suburban submarkets (including a complex of three Office
Properties located in El Segundo, adjacent to Los Angeles International
Airport, presently the nation's second largest air-cargo port, and a complex
of five Office Properties located adjacent to the Long Beach Municipal
Airport), and one Industrial Property is located in Phoenix, Arizona. As of
June 30, 1996, the Office Properties were approximately 94.1% leased to 88
tenants and the Industrial Properties were approximately 98.4% leased to nine
tenants. The average age of the Office Properties and the Industrial
Properties is approximately ten years and twenty-seven years, respectively.
The Company developed and leased all but one of the Office Properties and
seven of the nine Industrial Properties, and upon consummation of the Offering
and acquisition of the Acquisition Properties will manage all of the
Properties.
 
  The Company was founded in 1947 by John B. Kilroy, Sr., a nationally
prominent member of the real estate community, and is led by John B. Kilroy,
Jr., the Company's President since 1981. The Company's executive officers have
served as members of the Company's executive management team for an average of
approximately 15 years. The Company has been involved in the ownership,
acquisition, entitlement, development, leasing and management of commercial
properties, the majority of which are located in Southern California, for
nearly 50 years and has been focusing primarily on office and industrial
development for the past 30 years. The Company presently has 46 employees, 36
of whom are located at the Company's headquarters at Kilroy Airport Center at
El Segundo, California.
 
  The Company's strategy has been to own, develop, acquire, lease and manage
Class A properties in select locations in key suburban submarkets, primarily
in Southern California, that the Company believes have strategic advantages
compared to neighboring submarkets. The Company's extensive experience and
long-term presence in Southern California have enabled it to form key
alliances and working relationships with major corporate tenants,
municipalities and landowners in Southern California that have resulted in a
variety of development projects and provide an on-going source of development
and acquisition opportunities. The Southern California Properties located in
Los Angeles and Orange Counties are situated in locations which the Company
believes are among the best within key submarkets, offering tenants: (i) lower
business taxes and operating expenses than adjoining submarkets; (ii) access
to highly skilled labor markets; (iii) access to major transportation
facilities such as freeways, airports and the expanded Southern California
light-rail system; (iv) proximity to the Los Angeles-Long Beach port complex,
which presently ranks as the largest commercial port in the United States; and
(v) for tenants with their names on certain Properties, visibility to freeway
and airline travelers.
 
  The Company also has focused on the design and construction of its projects.
The Office Properties were designed and developed to above-standard
specifications, with an emphasis on long-term operating efficiency and tenant
comfort. The Industrial Properties also were designed and developed to provide
above-standard quality and meet the long-term needs of tenants and were
designed as multi-use facilities to satisfy various types of manufacturing,
distribution and office uses. As a result, the Industrial Properties continue
to serve the evolving needs of their tenants, some of which have recently
invested substantially in long-term tenant improvements. As a result of the
high quality and strategic location of the Company's Properties, and the
Company's attention to the highest quality management and service, the Company
believes that the Properties attract major corporate tenants and historically
have achieved among the highest occupancy, tenant retention and rental rates,
both within their respective submarkets and as compared to their respective
neighboring submarkets. See "Business and Properties--Office Properties" and
"--Industrial Properties."
 
                                      33
<PAGE>
 
  The Company has created value by effectively working with municipalities,
large landowners and other members of the real estate community in Southern
California, and has maintained strong relationships at all levels of
government, as well as with financial institutions and major corporate
tenants. In 1981, the Company initiated the El Segundo Employers' Association,
a traffic and management organization composed of major employers in the El
Segundo area. The organization has worked with local government and has been
instrumental in the furtherance of infrastructure developments in El Segundo
and throughout the surrounding area, including two recent developments that
management believes will have a substantial economic benefit to the El Segundo
submarket. First, in October 1994, Interstate Highway I-105 (the "I-105
Freeway") opened, which crosses Los Angeles from east to west and provides
substantially improved access to El Segundo and Los Angeles International
Airport. A second infrastructure development in the El Segundo submarket is a
major east-west grade-separated light rail commuter line (the "Green Line").
The Green Line runs adjacent to Kilroy Airport Center at El Segundo.
Management believes that the Green Line, which opened in August 1995, will add
significant value to the El Segundo submarket. See "Business and Properties--
The Company's Southern California Submarkets--El Segundo Submarket."
 
  The Company's major tenants include, among others, Hughes Space &
Communications, a tenant since 1984, which is engaged in high-technology
commercial activities including satellite development and related applications
such as DirecTV, as well as CompuServe, Inc., Employer's Health Insurance Co.,
the Federal Aviation Administration, First Nationwide Mortgage Corporation,
Furon Co., Inc., GTE Directories Sales Corporation, Great Western Bank,
HealthNet, Mattel, Inc. (which has its worldwide corporate headquarters in
El Segundo), North American Title Company, Northwest Airlines, Inc., Olympus
America, Inc., The Prudential Insurance Company of America, R.L. Polk &
Company, SCAN HealthPlan, Senn-Delaney Leadership Consulting Group, Inc.,
Transamerica Financial Services, Inc., 20th Century Industries, UniCare
Financial Corporation and Unihealth. As of December 31, 1995, the Company's
ten largest office tenants (based upon annual base rents as of December 31,
1995 base rents) had leased office space from the Company for an average of
5.4 years. The Company's strong relationships with its tenants is further
evidenced by its average tenant retention rate (based upon rentable square
feet) for the three-year period ended December 31, 1995, which was 72.2%. The
Company's extensive experience and long-term presence in Southern California
have enabled it to form key alliances and working relationships with large
corporate tenants, municipalities and landowners that have led to a variety of
development projects and provide a continuing source of development and
acquisition opportunities with institutional sellers. As a result of its
experience and relationships, the Company currently has exclusive rights to
develop approximately 24 acres of developable land (net of the acreage
required for streets) at Kilroy Airport Center Long Beach, and has an
exclusive agreement to negotiate to acquire an additional six acres of
developable land (net of acreage reserved for open areas) at the Thousand Oaks
Civic Arts Plaza Entertainment and Retail Center. These properties are
presently entitled for over 1.0 million rentable square feet of office,
industrial and retail space, creating acquisition and development
opportunities without, in most cases, significant carrying costs.
 
  The Company believes that the foundation for its growth in future years will
be the strengthening Southern California economy, the quality and strategic
location of its Properties, the economic benefits of its submarkets to
tenants, its capital structure, its access to public capital markets, the lack
of new construction of office properties in its submarkets, its access to
developable properties, the knowledge and experience of its senior management
team and its long-term relationships with the Southern California real estate
community, large corporate tenants, municipalities, landowners and
institutional sellers. In addition, the Company believes that it will be one
of a limited number of REITs focusing on office and industrial properties and
that it will be the only REIT with a 50-year operating history concentrating
primarily on suburban Southern California office and industrial properties. In
the 12 months following the consummation of the Offering, the Company expects
sources of potential growth in cash available for distribution per share from
the amount set forth under the caption "Distribution Policy," through: (i) the
further leasing of its available space, currently approximately 101,000
rentable square feet; (ii) the renewal of leases for approximately 35,000
rentable square feet which expire during such period; (iii) the acquisition of
strategic properties with Units and/or with available cash and borrowings
under the Credit Facility; and (iv) additional fees from development services
and related activities. In the second 12-month period following consummation
of the Offering, the Company expects sources of
 
                                      34
<PAGE>
 
potential growth in cash flow per share from: (i) contractual increases in
base rent payments from tenants; (ii) continued leasing of available space;
(iii) the contemplated completion of certain planned development activities;
(iv) increased fee income, including development fees and related leasing and
management activities provided to third parties; and (v) the acquisition of
strategic properties. In addition, the Company presently plans to expand one
or more of its Industrial Properties during the next two years, subject to
substantial pre-leasing. There can be no assurance, however, that the Company
will achieve any growth in cash available for distribution per share, that
available space will be leased, that leases scheduled to expire will be
renewed, that the Company will successfully complete any of its planned
development activities or that the Company will be able to acquire and develop
any of the Development Properties or other properties that may become
available. See "Risk Factors--Real Estate Investment Considerations--Risks of
Real Estate Acquisition and Development."
 
  The Company will continue its practice of managing or administering
substantially all leasing, management, tenant improvements and construction on
an "in-house" basis and will be self-administered and self-managed. The
Company intends to elect to qualify as a REIT for federal income tax purposes
beginning with its taxable year ending December 31, 1996. See "Federal Income
Tax Consequences--Taxation of the Company."
 
  Kilroy Realty Corporation, a Maryland corporation, has executive offices at
2250 East Imperial Highway, El Segundo, CA 90245 and its telephone number is
(213) 772-1193.
 
GROWTH STRATEGIES
 
  The Company's objectives are to maximize growth in cash flow per share and
to enhance the value of its portfolio through effective management, operating,
acquisition and development strategies. The Company believes that
opportunities exist to increase cash flow per share: (i) by acquiring office
and industrial properties with attractive returns in strategic suburban
submarkets where such properties complement its existing portfolio; (ii) from
contractual increases in base rent; (iii) as a result of increasing rental and
occupancy rates and decreasing concessions and tenant installation costs as
vacancy rates in the Company's submarkets generally continue to decline; (iv)
by developing properties for the benefit of the Company where such development
will result in a favorable risk adjusted return on investment or,
alternatively, on a fee basis for others; and (v) by expanding Properties
within the Company's existing industrial portfolio.
 
  The Company believes that a number of factors will enable it to achieve its
business objectives, including: (i) the opportunity to lease available space
at attractive rental rates because of increasing demand and, with respect to
the Office Properties, the present lack of new construction in the Southern
California submarkets in which the Properties are located; (ii) the presence
of distressed sellers and inadvertent owners (through foreclosure or
otherwise) of office and industrial properties in the Company's markets, as
well as the Company's ability to acquire properties with Units (thereby
deferring the seller's taxable gain), all of which create enhanced acquisition
opportunities; (iii) the quality and location of the Company's Properties;
(iv) the Company's access to development opportunities as a result of its
significant relationships with large Southern California corporate tenants,
municipalities and landowners and its nearly 50-year presence in the Southern
California market; and (v) the limited availability to competitors of capital
for financing development, acquisitions or capital improvements. Management
believes that the Company is well positioned to exploit existing opportunities
because of its extensive experience in its submarkets, its seasoned management
team and its proven ability to develop, lease and efficiently manage office
and industrial properties. In addition, the Company believes that public
ownership and its capital structure will provide new opportunities for growth.
There can be no assurance, however, that the Company will be able to lease
available space, complete any property acquisitions, successfully develop any
land acquired or improve the operating results of any developed properties
that are acquired. See "Business and Properties--Development, Leasing and
Management Activities."

  Operating Strategies. The Company will focus on enhancing growth in cash
flow per share by: (i) maximizing cash flow from existing Properties through
active leasing, contractual base rent increases and effective property
management; (ii) managing operating expenses through the use of in-house
management, leasing, marketing, financing, accounting, legal, construction
management and data processing functions;
 
                                      35
<PAGE>
 
(iii) maintaining and developing long-term relationships with a diverse tenant
group; (iv) attracting and retaining motivated employees by providing
financial and other incentives to meet the Company's operating and financial
goals; and (v) continuing to emphasize capital improvements to enhance the
Properties' competitive advantages in their markets.
 
  The Company believes that the strength of its leasing is demonstrated by the
Company's leasing activity since 1993. In the period from January 1, 1993 to
June 30, 1996, the Company leased or renewed leases for an aggregate of
approximately 845,000 rentable square feet of office space and approximately
318,000 rentable square feet of industrial space. As of December 31, 1995, the
Office Properties were approximately 89.3% leased as compared to approximately
82.0% for the Southern California Area, approximately 89.2% for the El Segundo
submarket and approximately 85.4% in the Long Beach submarket. In addition, at
December 31, 1995, the Industrial Properties were approximately 98.4% leased
as compared to approximately 82.3% and approximately 87.1% for industrial
properties located in Los Angeles and Orange Counties, respectively. As of
June 30, 1996, (i) the Office Properties contained approximately 1.5 million
rentable square feet and were approximately 94.1% leased, and (ii) the
Industrial Properties contained an aggregate of approximately 900,000 rentable
square feet and were approximately 98.4% leased. In addition, the number of
individual lease transactions since 1992, including the results for the six-
month period ended June 30, 1996, averaged over 26 per year. See "Business and
Properties--General," "--Properties," "--Occupancy and Rental Information,"
and "--The Company's Southern California Submarkets."
 
  Approximately 800,000 aggregate rentable square feet in the Properties was
leased by the Company from January 1, 1992 through December 31, 1994, a period
which management characterizes as recessionary. Based on the leases the
Company signed in 1996, and the findings in an independent study of the
Southern California real estate market commissioned by the Company, management
believes that the recent trend toward increasing rental rates in Class A
office and industrial buildings in the Company's markets presents significant
opportunities for growth. In addition, approximately 72.7% of the Company's
net rentable square feet is subject to leases expiring in 2000 or beyond, when
management expects asking rents for the respective Properties to be higher
than the rents paid pursuant to such leases. In addition, approximately 34.2%
of the Company's total base rent (representing approximately 26.0% of the
Company's total rentable square feet) is attributable to leases with Consumer
Price Index increases. No assurance can be given, however, that new leases
will reflect rental rates higher than current rental rates greater than or
equal to current or future economic conditions will support higher rental
rates. See "Risk Factors--Real Estate Investment Considerations."
 
  Acquisition Strategies. The Company will seek to increase its cash flow per
share by acquiring additional quality office and industrial properties,
including properties that may: (i) provide attractive initial yields with
significant potential for growth in cash flow from property operations; (ii)
are strategically located, of high quality and competitive in their respective
submarkets; (iii) are located in the Company's existing submarkets and/or in
other strategic submarkets where the demand for office and industrial space
exceeds available supply; or (iv) have been under-managed or are otherwise
capable of improved performance through intensive management and leasing that
will result in increased occupancy and rental revenues. The Company believes
that the Southern California market is an established and mature real estate
market in which property owners generally have a low tax basis (and,
accordingly, the potential for large taxable gains) in their properties.
Management believes that the Company's extensive experience, capital structure
and ability to acquire properties for Units, and thereby defer a seller's
taxable gain, if any, will enhance the ability of the Company to consummate
transactions quickly and to structure more competitive acquisitions than other
real estate companies in the market which lack its access to capital or the
ability to issue Units. See "Business and Properties-- Development, Leasing
and Management Activities."
 
  The Company has entered into an agreement to acquire the two office
properties that comprise Phase I of Kilroy Airport Center Long Beach. Kilroy
Airport Center Long Beach Phase I was developed by the Company in 1987 and has
been leased and managed by the Company since its inception. In addition, the
Company has entered into an agreement to purchase an office property located
in Thousand Oaks, California. The acquisition of the Acquisition Properties by
the Company is expected to occur concurrently with the consummation of the
 
                                      36
<PAGE>
 
Offering and, accordingly, the Acquisition Properties are included in the
discussion of the Office Properties included throughout this Prospectus. The
Company also has entered into agreements to acquire three industrial
properties, each of which remains subject to satisfactory documentation and
completion of the Company's due diligence procedures. Accordingly, there can
be no assurance that any of such properties will be acquired. There can be no
assurance, however, that the Company will be able to complete any property
acquisitions, successfully develop any land acquired or improve the operating
results of any developed properties that are acquired. See "Business and
Properties--Acquisition Properties."
 
  Development Strategies. The Company's interests in the Development
Properties provide it with significant growth opportunities. These projects
allow the Company to control development on the land, while significant costs
of carry prior to the completion of development are in most cases funded by
others.
 
  The Company is the master ground lessee of, and has sole development rights
in, Kilroy Airport Center Long Beach, a planned four-phase, approximately 53-
acre property entitled for office, research and development, light industrial
and other commercial projects at which the Company owns all five existing
Office Properties and manages all ongoing leasing and development activities.
The Company developed Phases I and II in 1987 and 1989/1990, respectively,
encompassing an aggregate of approximately 620,000 rentable square feet of
office and light industrial space. Phases III and IV presently are planned to
be developed on the project's approximately 24 undeveloped acres and are
entitled for an aggregate of approximately 900,000 rentable square feet. The
Company is currently in discussions with several prospective tenants for
office space presently planned to be included in Kilroy Long Beach Phase III.
See "Business and Properties--Development, Leasing and Management Activities--
Kilroy Long Beach."
 
  The Company has entered into an exclusive agreement to negotiate a
Development and Disposition Agreement in connection with the Thousand Oaks
Civic Arts Plaza Retail and Entertainment Center project, an approximately 11-
acre project (representing approximately six developable acres net of acreage
reserved for open areas) presently contemplated to include an approximately
90,000 square foot multiplex theater and virtual reality entertainment center
and retail space. The project is located in the City of Thousand Oaks,
immediately adjacent to the City's recently completed $65 million Civic Arts
Plaza Complex. See "Business and Properties--Development, Leasing and
Management Activities--Thousand Oaks."
 
  The Company also has entered into a Development Management Agreement in
connection with the development, on a fee basis, of the Riverside Judicial
Center. See "Business and Properties--Development, Management and Leasing
Activities--Riverside Judicial Center." In addition, the Company has been
engaged on a fee basis as a consultant in connection with the development of
an approximately 200-acre site presently owned by Northrop Grumman
Corporation. See "Business and Properties--Development, Management and Leasing
Activities--Northrop Grumman."
 
  In addition, certain of the Industrial Properties can support additional
development, and the Company presently is planning to develop in the next two
years, subject to substantial pre-leasing, approximately 105,000 rentable
square feet of such additional space.
 
  The Company may engage in the development of other office and/or industrial
properties primarily in Southern California submarkets when market conditions
support a favorable risk-adjusted return on such development. The Company's
activities with third-party owners in Southern California are expected to give
the Company further access to development opportunities. There can be no
assurance, however, that the Company will be able to successfully develop any
of the Development Properties or any other properties. See "Business and
Properties--Development, Leasing and Management Activities."
 
  Financing Policies. The Company intends to limit the ratio of debt to total
market capitalization (total debt of the Company as a percentage of the market
value of issued and outstanding shares of Common Stock, including interests
exchangeable therefor, plus total debt) to approximately 50%, although the
Company's organizational documents do not limit the amount of indebtedness
that the Company may incur. Upon completion of the transactions outlined under
the caption "Formation and Structure of the Company," total debt will
constitute approximately 25.6% of the total market capitalization of the
Company (assuming an initial public offering price of $20.00 per share of
Common Stock). The Company anticipates that upon consummation of
 
                                      37
<PAGE>
 
the Offering all of the permanent indebtedness will bear interest at fixed
rates. The Company intends to utilize one or more sources of capital for
future acquisitions, including development and capital improvements, which may
include undistributed cash flow, borrowings under the Credit Facility,
issuance of debt or equity securities and other bank and/or institutional
borrowings. There can be no assurance, however, that the Company will be able
to obtain capital for any such acquisitions, developments or improvements on
terms favorable to the Company. See "--Growth Strategies," "The Company--
Growth Strategies" and "Business and Properties--Development, Leasing and
Management Activities" and "--Debt Structure."
 
                                      38
<PAGE>
 
                                USE OF PROCEEDS
 
  The net proceeds to the Company from the sale of Common Stock in the
Offering (based on the midpoint of the range of the initial public offering
price set forth on the cover page of this Prospectus), after deduction of
underwriting discounts and commissions and estimated offering expenses, are
expected to be approximately $169.7 million (approximately $195.6 million if
the Underwriters' over-allotment option is exercised in full). In addition to
the net proceeds from the Offering, the Operating Partnership expects to
receive net proceeds from the Financing, after payment of expenses related
thereto, of approximately $74.2 million. The Company intends to apply the net
proceeds of the Offering and from the Financing as follows:
<TABLE>
<CAPTION>
                                                                   AMOUNT
                                                               --------------
                                                               (IN THOUSANDS)
    <S>                                                        <C>
    Repayment of existing mortgage debt (net of
     discounts/premiums)......................................    $204,661
    Acquisition of the Acquisition Properties.................      36,300
    Financing expenses........................................       1,500
    Contribution to working capital...........................       1,525
                                                                  --------
        Total.................................................    $243,986
                                                                  ========
</TABLE>
 
  As of August 31, 1996, the estimated principal amount of certain
indebtedness of the Kilroy Group secured by the Properties which is to be
repaid with net proceeds of the Offering and the Financing was approximately
$204.7 million (representing approximately $202.5 million of outstanding
indebtedness and approximately $2.2 million of accrued expenses in connection
with certain borrowings), of which approximately $34.8 million has been
guaranteed by certain members of the Kilroy Group, including officers and
directors of the Company. An aggregate of approximately $20.8 million of
indebtedness was incurred within the last year, $1.1 million of which was
incurred to finance tenant improvements and to pay leasing commissions related
to Kilroy Airport Center Long Beach, and $19.7 million of which was used to
repay $16.6 million of existing indebtedness (including $3.4 million of
indebtedness of a Continuing Investor and accrued interest and prepayment
penalties in connection with such repayments), and to pay approximately
$940,000 in property taxes and approximately $454,000 in loan costs, legal
fees and other expenses in connection with such financing, with the remainder
being contributed to working capital.
 
                                      39
<PAGE>
 
  The following mortgages and loans (which are all of the current outstanding
mortgages and loans on the Properties) are intended to be repaid. The mortgages
to be repaid upon completion of the Offering had a weighted average interest
rate of approximately 8.76% and a weighted average remaining term to maturity
of approximately 3.80 years as of June 30, 1996.
 
<TABLE>
<CAPTION>
                                                          DEBT TO BE REPAID UPON
                                                            COMPLETION OF THE
PROPERTY LOCATION                                                OFFERING
- -----------------                                         ----------------------
                                                              (IN THOUSANDS)
<S>                                                       <C>
Kilroy Airport Center at El Segundo
 2240 E. Imperial Highway
 2250 E. Imperial Highway
 2260 E. Imperial Highway
  El Segundo, California..................................        $ 95,000 

 
Kilroy Airport Center Long Beach
 3750 Kilroy Airport Way
 3760 Kilroy Airport Way
 3780 Kilroy Airport Way
  Long Beach, Californ....................................          56,300 

 
2031 E. Mariposa Avenue
 El Segundo, California(2)...............................           12,000
3332 E. La Palma Avenue
 Anaheim, California.....................................            7,600
 
2260 E. El Segundo Boulevard
 El Segundo, California
2265 E. El Segundo Boulevard
 El Segundo, California
2270 E. El Segundo Boulevard
 El Segundo, California
185 S. Douglas Street
 El Segundo, California..................................           21,925(1) 

 
1000 E. Ball Road
 Anaheim, California(2)
1230 S. Lewis Street
 Anaheim, California(2)..................................            5,566 

 
12681/12691 Pala Drive,
 Garden Grove, California................................            3,270
5115 N. 27th Avenue
 Phoenix, Arizona........................................            3,000
                                                                  --------
                                                                  $204,661
                                                                  ========
</TABLE>
- --------
(1) This indebtedness is also secured by a second mortgage on the properties
    located at 1000 East Ball Road, Anaheim, California, 1230 S. Lewis Street,
    Anaheim, California and 2031 E. Mariposa Avenue, El Segundo, California.
(2) This property is also subject to second mortgage indebtedness securing the
    $19.7 million aggregate principal amount of indebtedness which will be
    repaid with the net proceeds of the Offering.
 
                                       40
<PAGE>
 
  In the event that the Underwriters' over-allotment option is exercised, the
net proceeds thereof will be used by the Company for additional working
capital and will be available for development and for future acquisitions of
additional properties not yet identified. Pending application of such net
proceeds, the Company will invest the net proceeds in interest-bearing
accounts and short-term, interest-bearing securities, which are consistent
with the Company's intention to qualify for taxation as a REIT. Such
investments may include, for example, obligations of the Governmental National
Mortgage Association, other government and government agency securities,
certificates of deposit and interest-bearing bank deposits.
 
                              DISTRIBUTION POLICY
 
  The Company presently intends to make regular quarterly distributions to
holders of its Common Stock. The first distribution, for the period commencing
upon the consummation of the Offering and ending       , 1997, is anticipated
to be approximately $    per share (which is equivalent to a quarterly
distribution of $.40 per share or an annual distribution of $1.60 per share)
which results in an initial annual distribution rate of 8.0%, based on the
midpoint of the range of the initial public offering price set forth on the
cover page of this Prospectus. The Company does not expect to change its
estimated distribution rate if any of the Underwriters' over-allotment option
is exercised. The Company currently expects to distribute approximately 90.4%
of estimated cash available for distribution for the 12 months following the
consummation of the Offering. Units and shares of Common Stock will receive
equal distributions. The Board of Directors may vary the percentage of cash
available for distribution which is distributed if the actual results of
operations, economic conditions or other factors differ from the assumptions
used in the Company's estimates.
 
  The Company believes that its estimate of cash available for distribution
constitutes a reasonable basis for setting the initial distribution rate and
is made solely for the purpose of setting the initial distribution rate and is
not intended to be a projection or forecast of the Company's results of
operations or of its liquidity. The Company presently intends to maintain the
initial distribution rate for the 12 months following the consummation of the
Offering unless actual results from operations, economic conditions or other
factors differ significantly from the assumptions used in its estimate.
However, no assurance can be given that the Company's estimate will prove
accurate. The actual return that the Company will realize will be affected by
a number of factors, including the revenue received from the Properties, the
distributions and other payments received from the Operating Partnership and
Services Company (which in turn is based in part on revenues received from
third-party development activities), the operating expenses of the Company,
the interest expense incurred on its borrowings, the ability of tenants to
meet their obligations, general leasing activity and unanticipated capital
expenditures. See "Risk Factors--Real Estate Investment Considerations."
 
 
                                      41
<PAGE>
 
  The following table illustrates the adjustments made by the Company to its
pro forma Funds from Operations for the twelve months ended June 30, 1996 in
order to calculate estimated cash available for distribution;
<TABLE>
<CAPTION>
                                                                    AMOUNT
                                                                    -------
                                                                 (IN THOUSANDS,
                                                                   EXCEPT PER
                                                                 SHARE AMOUNTS)
   <S>                                                           <C>
   Pro forma net income before minority interests for the year
    ended December 31, 1995....................................     $10,695
   Plus pro forma net income before minority interests for the
    six months ended June 30, 1996.............................       6,416
   Less pro forma net income before minority interests for the
    six months ended June 30, 1995.............................      (5,168)
                                                                    -------
   Pro forma net income before minority interests for the 12
    months ended June 30, 1996(1)..............................      11,943
   Add back non-cash items:
     Pro forma depreciation for the 12 months ended June 30,
      1996(2)..................................................       8,250
     Pro forma amortization for capitalized leasing commissions
      for the 12 months ended June 30, 1996(2).................       1,139
                                                                    -------
   Pro forma Funds from Operations for the 12 months ended June
    30, 1996...................................................      21,332
   Adjustments:
     Net increases in contractual rental income(3).............         238
     Net increase from new leases(4)...........................       1,850
     Net effect of lease expirations, assuming no renewals(5)..      (2,236)
     Net effect of straight-line rents(6)......................         111
                                                                    -------
   Estimated cash flow from operating activities for the 12
    months ending June 30, 1997................................      21,295
   Estimated capitalized tenant improvements and leasing
    commissions(7).............................................        (957)
   Estimated capital expenditures(8)...........................        (150)
   Scheduled debt principal payments(9)........................        (875)
                                                                    -------
   Estimated cash available for distribution for the 12 months
    ending June 30, 1997.......................................     $19,313
                                                                    =======
     Company's share of cash available for distribution(10)....     $16,377
     Minority interest's share of cash available for
      distribution.............................................     $ 2,936
                                                                    =======
   Total estimated initial annual distribution.................     $17,462
                                                                    =======
   Estimated initial annual distribution per share.............     $  1.60
                                                                    =======
   Estimated cash available for distribution payout ratio(11)..        90.4%
                                                                    =======
</TABLE>
- --------
(1) Assumes that no dividends will be paid by the Services Company during such
    period.
(2) Pro forma depreciation of $8,367,000 for the year ended December 31, 1995
    plus $4,052,000 for the six months ended June 30, 1996 less $4,169,000 for
    the six months ended June 30, 1995. Pro forma amortization of $985,000 for
    the year ended December 31, 1995 plus $519,000 for the six months ended
    June 30, 1996 less $365,000 for the six months ended June 30, 1995.
    Amortization consists primarily of amortization of deferred leasing
    commissions. Non-cash interest expense of $107,000 related to amortization
    of the costs associated with the Mortgage Loan is not added back in this
    table in conformity with NAREIT's definition of Funds from Operations.
(3) Represents an incremental increase in Funds from Operations attributable
    to contractual rental increases for the 12 months ending June 30, 1997
    (over actual rental revenue included in pro forma Funds from Operations
    for the 12 months ended June 30, 1996). The contractual rental increases
    are limited to the actual number of months in which the increased rental
    rate will be in effect as to each lease.
 
                                             (footnotes continued on next page)
 
                                      42
<PAGE>
 
 (4) Represents the incremental increase in Funds from Operations attributable
     to rental revenue from new executed leases commencing after June 30, 1995
     for the 12 months ending June 30, 1997.
 
 (5) Represents the elimination of rental revenue reflected in rental revenue
     for the 12 months ended June 30, 1996 from: (i) leases which expired
     between June 30, 1995 and June 30, 1996 ($1,507,000) and (ii) leases
     which will expire between June 30, 1996 and June 30, 1997 for that
     portion of such fiscal year that such leases are no longer in effect
     ($729,000).
 
  This table assumes that leases which expire prior to June 30, 1997 will not
  be renewed or re-leased during the period. As a result of this assumption,
  the effective average occupancy rate of the Properties for the 12-month
  period ending June 30, 1997 will equal 94.3%, versus the actual occupancy
  rate for the Properties of 95.8% as of June 30, 1996. The Company's average
  tenant retention rate for expiring leases for 1993 through 1995 was
  approximately 72.2%.
 
 (6) Represents the effect of adjusting straight-line rental income and
     expense included in pro forma net income from an accrual basis under GAAP
     to a cash basis.
 
 (7) Reflects projected non-incremental revenue-generating tenant improvement
     ("TI") and leasing commission ("LC") for the 12-month period ending June
     30, 1997 based on the weighted average TI and LC expenditures for all
     renewed and retenanted space incurred during 1993, 1994 and 1995,
     multiplied by the average annual net rentable square feet of leased space
     expiring during the three 12-month periods following the consummation of
     the Offering.
 
<TABLE>
<CAPTION>
                                                                      WEIGHTED
                                                  1993   1994  1995   AVERAGE
                                                  ----- ------ ----- ----------
   <S>                                            <C>   <C>    <C>   <C>
     OFFICE PROPERTIES:
       Retenanted
         TI per net rentable square foot........  $9.23 $24.03 $4.80 $    15.55
         LC per net rentable square foot........  $2.94 $ 4.08 $4.27       3.97
                                                                     ----------
           Total weighted average TI and LC.....                          19.52
           Average annual net rentable square
            feet of leased space expiring during
            the three 12-month periods following
            the Offering........................                        109,758
                                                                     ----------
           Total estimated annual TI and LC.....                      2,142,476
           Rate of retenant(i)..................                             30%
                                                                     ----------
           Total cost of retenants..............                     $  642,808
       Renewals
         TI per net rentable square foot........  $ --  $  .25 $4.14 $     2.42
         LC per net rentable square foot........  $ --  $  .07 $ .57        .35
                                                                     ----------
           Total weighted average TI and LC.....                           2.77
           Average annual net rentable square
            feet of leases expiring during the
            three 12-month periods following the
            Offering............................                        109,758
                                                                     ----------
           Total estimated annual TI and LC.....                        304,030
           Rate of renewal(i)...................                             70%
                                                                     ----------
             Total cost of renewals.............                        213,168
                                                                     ----------
         Total TI and LC cost of Office
          Properties............................                     $  855,976
                                                                     ----------
     INDUSTRIAL PROPERTIES:
       TI per net rentable square foot..........  $ .14 $ 4.49 $2.00 $     2.19
       LC per net rentable square foot..........  $1.49 $ 3.49 $1.84       2.16
                                                                     ----------
         Total weighted average TI and LC.......                           4.35
         Average annual net rentable square feet
          of leases expiring during the three
          12-month periods following the
          Offering..............................                         23,333
                                                                     ----------
         Total estimated annual TI and LC.......                        101,497
                                                                     ----------
       Total....................................                     $  957,473
                                                                     ==========
</TABLE>
  --------
  (i) The historical weighted average renewal rate, based on square footage,
      for the Company from January 1, 1993 through December 31, 1995 is
      72.2%.
 
                                             (footnotes continued on next page)
 
                                      43
<PAGE>
 
 (8) Estimated annual capital expenditures not reimbursed by tenants.
     Represents the average of historical nonreimbursed capital expenditures
     at the Office and Industrial Properties during the years ended
     December 31, 1994 and 1995. All capital expenditures during 1993 were
     reimbursed by tenants.
 
 (9) Estimated principal payments on the Mortgage Loan.
 
(10) The Company's share of estimated distributions based on its approximately
     84.8% partnership interest in the Operating Partnership.
 
(11) Calculated as the estimated initial annual distribution divided by the
     estimated cash flow available for distribution for the 12 months ending
     June 30, 1997. The payout ratio of estimated adjusted pro forma Funds
     from Operations (which is substantially equivalent to the Company's
     estimated pro forma cash flow from operating activities) for the 12
     months ending June 30, 1997 equals 82.0%.
 
  The Company anticipates that its estimated cash available for distribution
will exceed earnings and profits due to non-cash expenses, primarily
depreciation and amortization, to be incurred by the Company. Distributions by
the Company to the extent of its current or accumulated earnings and profits
for federal income tax purposes, other than capital gain dividends, will be
taxable to stockholders as ordinary dividend income. Capital gain
distributions generally will be treated as long-term capital gains.
Distributions in excess of earnings and profits generally will be treated as a
non-taxable return of capital to the extent of each stockholder's basis in his
or her Common Stock to the extent thereof, and thereafter as taxable gain. The
non-taxable distributions will reduce each stockholder's tax basis in the
Common Stock and, therefore, the gain (or loss) recognized on the sale of such
Common Stock or upon liquidation of the Company will be increased (or
decreased) accordingly. Based on the estimated cash flow available for
distribution set forth in the table above, the Company believes that
approximately     % of distributions for the 12 months following consummation
of the Offering would represent a return of capital. If actual cash available
for distribution or taxable income vary from these amounts, the percentage of
distributions which represent a return of capital may be materially different.
For a discussion of the tax treatment of distributions to holders of Common
Stock, see "Federal Income Tax Consequences--Taxation of U.S. Stockholders"
and "--Taxation of Non-U.S. Stockholders." In order to qualify to be taxed as
a REIT, the Company must make annual distributions to stockholders of at least
95% of its REIT taxable income (determined without regard to the dividends
received deduction and by excluding any net capital gains) which the Company
anticipates will be less than its share of adjusted Funds from Operations.
Under certain circumstances, the Company may be required to make distributions
in excess of cash available for distribution in order to meet such
distribution requirements.
 
  Financing activities such as repayment or refinancing of loans also may
affect the Company's assets and liabilities and the amount of cash available
for distribution for future periods. Management will seek to control the
timing and nature of investing and financing activities in order to maximize
the Company's return on invested capital.
 
  Future distributions by the Company will be subject to the requirements of
the MGCL and the discretion of the Board of Directors of the Company, and will
depend on the actual cash flow of the Company, its financial condition, its
capital requirements, any decision by the Board of Directors to reinvest the
Operating Partnership's Funds from Operations rather than distribute such
funds to the Company, the annual distribution requirements under the REIT
provisions of the Code (see "Federal Income Tax Considerations--Taxation of
the Company--Annual Distribution Requirements") and such other factors as the
Board of Directors deems relevant. There can be no assurance that any
distributions will be made or that the expected level of distributions will be
maintained by the Company. See "Risk Factors--Real Estate Investment
Considerations" and "--Distribution Payout Percentage." If revenues generated
by the Company's properties in future periods decrease materially from current
levels, the Company's ability to make expected distributions would be
materially adversely affected, which could result in a decrease in the market
price of the shares of Common Stock.
 
  The Company may in the future implement a distribution reinvestment program
under which holders of shares of Common Stock may elect automatically to
reinvest distributions in additional shares of Common Stock. The Company may,
from time to time, repurchase shares of Common Stock in the open market for
purposes of
 
                                      44
<PAGE>
 
fulfilling its obligations under this distribution reinvestment program, if
adopted, or may elect to issue additional shares of Common Stock. If the
Company adopts a distribution reinvestment program, it will solicit
participation in the program after the Offering by means of a separate
prospectus, and a purchase of shares of Common Stock in the Offering does not
entitle any investor to participate in any such program. There can be no
assurance that the Company will adopt such a program, and consequently, the
probable date of adoption or number of shares of Common Stock that would be
available under such program cannot be determined at this time.
 
  Cash available for distribution is based on Funds from Operations (which is
defined by NAREIT as net income (loss) (computed in accordance with GAAP),
excluding gains (or losses) from debt restructuring and sales of property,
plus real estate related depreciation and amortization (excluding amortization
of deferred financing costs)) and after adjustments for unconsolidated
partnerships and joint ventures. The calculation of adjustments to pro forma
Funds from Operations is being made solely for the purpose of setting the
initial distribution amount and is not intended to be a projection or
prediction of the Company's actual results of operations nor is the
methodology upon which such adjustments are made intended to be a basis for
determining future distributions. Industry analysts generally consider Funds
from Operations to be an appropriate measure of the performance of an equity
REIT because it is predicated on cash flow analysis which such analysts
believe is more reflective of the value of real estate companies such as the
Company than a measure predicated on GAAP, which gives effect to non-cash
items such as depreciation. In addition, pro forma results of operations do
not purport to present the actual results that can be expected for future
periods. Funds from Operations does not represent cash generated from
operating activities in accordance with GAAP (which, unlike cash flow from
operations, generally reflects all cash effects of transactions and other
events that enter into the determination of net income), is not necessarily
indicative of cash flow available to fund cash needs and should not be
considered as an alternative to net income as an indication of performance or
to cash flow as a measure of liquidity. See "Management's Discussion and
Analysis of Financial Condition and Results of Operations--Funds from
Operations."
 
                                      45
<PAGE>
 
                                CAPITALIZATION
 
  The following table sets forth the capitalization of the Company (based on
the Combined Financial Statements of the Kilroy Group) as of June 30, 1996 on
an historical basis, and on a pro forma basis as adjusted to give effect to
the Formation Transactions, the Offering, the Financing and the application of
the net proceeds therefrom as described under the caption "Use of Proceeds."
The information set forth in the following table should be read in conjunction
with the Combined Financial Statements of the Kilroy Group and notes thereto,
the pro forma financial information of the Company and the notes thereto and
"Management's Discussion and Analysis of Financial Condition and Results of
Operations--Liquidity and Capital Resources" included elsewhere in this
Prospectus.
 
<TABLE>
<CAPTION>
                                                          JUNE 30, 1996
                                                      -------------------------
                                                      HISTORICAL    PRO FORMA
                                                      -----------   -----------
                                                      (DOLLARS IN THOUSANDS)
<S>                                                   <C>           <C>
Debt:
  Mortgage Loan(1)...................................  $   204,601  $    75,000
  Borrowings under Credit Facility(2)................          --           --
                                                       -----------  -----------
Total debt...........................................      204,601       75,000
                                                       -----------  -----------
Minority interest in the Operating Partnership(3)....          --        11,199
                                                       -----------  -----------
Stockholders' equity (deficit):
  Preferred Stock, $.01 par value, 30,000,000 shares
   authorized, none issued or outstanding............
  Common Stock, $.01 par value, 150,000,000 shares
   authorized, 9,260,000 shares issued and
   outstanding(3)(4).................................          --            93
  Capital in excess of par value.....................          --        62,387
  Accumulated deficit................................      (95,283)         --
                                                       -----------  -----------
Total stockholders' equity (deficit).................      (95,283)      62,480
                                                       -----------  -----------
Total capitalization.................................  $   109,318  $   148,679
                                                       ===========  ===========
</TABLE>
- --------
(1) The Company, on behalf of the Operating Partnership, intends to obtain a
    written commitment for the $75 million Mortgage Loan, the closing of which
    is a condition to the consummation of the Offering. See "The Financing--
    The Mortgage Loan."
(2) The Company, on behalf of the Operating Partnership, expects to obtain a
    written commitment to establish the $100 million Credit Facility, which
    the Company expects to enter into concurrently with the consummation of
    the Offering. See "The Financing--The Credit Facility."
(3) Assumes no exchange of the Units to be issued to the Continuing Investors
    in connection with the Formation Transactions. If all of the Units were
    exchanged, 10,913,835 shares of Common Stock would be outstanding.
(4) Excludes 1,000,000 shares of Common Stock reserved for issuance pursuant
    to the Stock Incentive Plan. See "Management--Stock Incentive Plan."
 
                                      46
<PAGE>
 
                                   DILUTION
 
  Purchasers of the Common Stock offered hereby will experience an immediate
and substantial dilution of the net tangible book value of their Common Stock
from the assumed initial public offering price. At June 30, 1996, the Company
had a negative combined net tangible book value of approximately $95.3
million, or $57.61 per share of Common Stock (assuming the exchange of Units
issued to Continuing Investors in connection with the Formation Transactions
into shares of Common Stock on a one-for-one basis). After giving effect to
the sale of the shares of Common Stock offered hereby at an assumed initial
public offering price of $20.00 per share of Common Stock, the deduction of
underwriting discounts and commissions and estimated Offering expenses and the
receipt by the Company of approximately $169.7 million in net proceeds from
the Offering, the pro forma net tangible book value at June 30, 1996 would
have been $62.5 million, or $6.75 per share of Common Stock. This amount
represents an immediate increase in net tangible book value of $64.36 per Unit
to Continuing Investors and an immediate dilution in pro forma net tangible
book value of $13.25 per share of Common Stock to new public investors. The
following table illustrates this per share dilution:
 
<TABLE>
   <S>                                                         <C>      <C>
   Assumed initial public offering price per share............          $20.00
     Pro forma net tangible book value before the
      Offering(1)............................................. $(57.61)
     Increase in pro forma net tangible book value
      attributable to the Offering and Formation
      Transactions............................................   64.36
                                                               -------
   Pro forma net tangible book value after the Offering(2)....            6.75
                                                                        ------
   Dilution in pro forma net tangible book value to new
    investors(3)..............................................          $13.25
                                                                        ======
</TABLE>
- --------
(1) Net tangible book value per share of Common Stock before the Offering is
    determined by dividing net tangible book value (total tangible assets less
    total liabilities) of the Company by the number of shares of Common Stock
    of the Company representing the exchange in full of the Units to be issued
    to the Continuing Investors.
(2) Based on pro forma net tangible book value of approximately $62.5 million
    divided by 9,260,000 shares of Common Stock outstanding. There is no
    impact on dilution attributable to the exchange of Units to be issued to
    the Continuing Investors due to the effect of minority interest.
(3) Dilution is determined by subtracting pro forma net tangible book value
    per share of Common Stock after giving effect to the Formation
    Transactions and the Offering from the assumed initial public offering
    price paid by a new investor for a share of Common Stock.
 
  The following table sets forth, on a pro forma basis giving effect to the
Offering and the Formation Transactions: (i) the number of shares of Common
Stock to be sold by the Company in the Offering and the number of Units issued
to the Continuing Investors in connection with the Formation Transactions;
(ii) the net tangible book value as of June 30, 1996 of the assets contributed
to the Operating Partnership in the Formation Transactions; and (iii) the net
tangible book value of the average contribution per share/Unit based on total
contributions. See "Risk Factors--Immediate and Substantial Dilution."
 
<TABLE>
<CAPTION>
                             SHARES/UNITS    BOOK VALUE OR CASH
                              ISSUED(1)         CONTRIBUTIONS          AVERAGE PRICE
                          ------------------ ------------------------       PER
                            NUMBER   PERCENT   AMOUNT       PERCENT     SHARE/UNIT
                          ---------- ------- ----------     ---------  -------------
                                             (IN THOUSANDS)
<S>                       <C>        <C>     <C>            <C>        <C>
New investors...........   9,260,000   84.8% $  185,200 (2)   248.7 %     $ 20.00
Units issued to
 Continuing Investors in
 connection with the
 Formation
 Transactions...........   1,653,835   15.2%   (110,747)(3)  (148.7)%     $(66.55)
                          ----------  -----  ----------     -------
    Total...............  10,913,835  100.0% $   74,453       100.0 %
                          ==========  =====  ==========     =======
</TABLE>
- --------
(1) Reflects the shares of Common Stock offered hereby and the Units to be
    issued to the Continuing Investors in exchange for assets contributed in
    connection with the Formation Transactions at the initial exchange ratio
    of one share of Common Stock for each Unit. There are, however, certain
    restrictions on the exchange of Units. See "Partnership Agreement of the
    Operating Partnership--Redemption/Exchange Rights."
(2) This amount is based on the assumed initial public offering price of
    $20.00.
(3) Based on the June 30, 1996 pro forma book value of the assets to be
    contributed to the Operating Partnership in connection with the Formation
    Transactions less underwriting discounts and commissions and estimated
    expenses of the Offering.
 
                                      47
<PAGE>
 
                            SELECTED FINANCIAL DATA
 
  The following table sets forth certain financial data on a pro forma basis
for the Company, and on an historical basis for the Kilroy Group, which
consist of the combined financial statements of the Kilroy Group (the
"Combined Financial Statements") whose financial results will be consolidated
in the historical and pro forma financial statements of the Company. The
financial data should be read in conjunction with the historical and pro forma
financial statements and notes thereto included in this Prospectus. The
combined historical summary financial data as of December 31, 1994 and 1995
and for each of the three years in the period ended December 31, 1995 have
been derived from the Combined Financial Statements of the Kilroy Group
audited by Deloitte & Touche LLP, independent public accountants, whose report
with respect thereto is included elsewhere in this Prospectus. The selected
combined historical financial and operating information as of December 31,
1993, 1992 and 1991 and June 30, 1996 and for the years ended December 31,
1992 and 1991 and the six months ended June 30, 1996 and June 30, 1995 have
been derived from the unaudited Combined Financial Statements of the Kilroy
Group and, in the opinion of management, include all adjustments, consisting
only of normal recurring adjustments, necessary for a fair statement of the
operating information for the unaudited periods. The pro forma data assume the
completion of the Formation Transactions, including acquisition of the
Acquisition Properties and the consummation of the Offering (based upon the
midpoint of the range of the initial public offering price set forth on the
cover page of this Prospectus) and the Financing and use of the aggregate net
proceeds therefrom as described under "Use of Proceeds" as of the beginning of
the periods presented for the operating data and as of the balance sheet date
for the balance sheet data. The pro forma financial data do not give effect to
the recent extension of the tenant lease with Hughes Space & Communications
with respect to space leased in the Office Property located at 2250 E.
Imperial Highway, El Segundo, California and a portion of the space leased in
the Office Property located at 2240 E. Imperial Highway, El Segundo,
California. The pro forma financial data are not necessarily indicative of
what the actual financial position or results of operations of the Company
would have been as of and for the periods indicated, nor does it purport to
represent the future financial position and results of operations.
 
 
                                      48
<PAGE>
 
             THE COMPANY (PRO FORMA) AND KILROY GROUP (HISTORICAL)
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                           SIX MONTHS ENDED JUNE 30,                      YEAR ENDED DECEMBER 31,
                         -------------------------------  -------------------------------------------------------------
                                    COMBINED HISTORICAL                           COMBINED HISTORICAL
                         PRO FORMA  --------------------  PRO FORMA  --------------------------------------------------
                           1996        1996      1995       1995       1995       1994       1993      1992      1991
                         ---------  ---------- ---------  ---------  ---------  ---------  --------  --------  --------
<S>                      <C>        <C>        <C>        <C>        <C>        <C>        <C>       <C>       <C>
STATEMENT OF OPERATIONS
 DATA:
 Rental income.......... $ 17,259    $ 14,837  $  13,949  $  32,884  $  28,285  $  27,518  $ 29,139  $ 27,935  $ 24,898
 Tenant reimbursements..    1,981       1,658      1,275      3,434      2,746      1,549     3,507     3,623     3,886
 Parking income.........      800         800        727      1,447      1,447      1,216     1,205     1,143     1,199
 Development and
  management fees.......                  458        695                 1,156        919       751       882       779
 Sale of air rights.....                                                 4,456
 Other income...........      261          58         52        803        395      1,077       174       180       144
                         --------    --------  ---------  ---------  ---------  ---------  --------  --------  --------
 Total revenues.........   20,301      17,811     16,698     38,568     38,485     32,279    34,776    33,763    30,906
                         --------    --------  ---------  ---------  ---------  ---------  --------  --------  --------
 Property expenses......    2,647       2,719      2,571      5,339      5,376      4,674     4,320     4,469     6,741
 Real estate taxes
  (refunds).............      726         518        670      1,503      1,139       (929)    2,500     3,276        96
 General and
  administrative
  expense...............    2,199         876        881      4,389      2,050      2,406     1,033       932       773
 Ground lease...........      399         230        216        813        475        591       772       696       568
 Development expenses...                  485        384                   737        468       581       429       255
 Interest expense.......    3,307       9,422     11,813      6,613     21,529     22,739    23,151    23,624    23,577
 Depreciation and
  amortization..........    4,571       4,051      4,013      9,352      8,313      8,740     8,990     8,954     8,196
                         --------    --------  ---------  ---------  ---------  ---------  --------  --------  --------
 Total expenses.........   13,849      18,301     20,548     28,009     39,619     38,689    41,347    42,380    40,206
                         --------    --------  ---------  ---------  ---------  ---------  --------  --------  --------
 Income (loss) before
  equity in income of
  subsidiary, minority
  interest and
  extraordinary item....    6,452        (490)    (3,850)    10,559     (1,134)    (6,410)   (6,571)   (8,617)   (9,300)
 Equity in income (loss)
  of subsidiary.........      (36)                              136
 Minority interest......     (975)                           (1,625)
 Extinguishment of
  debt..................               12,887                           15,267      1,847
                         --------    --------  ---------  ---------  ---------  ---------  --------  --------  --------
 Net income (loss)...... $  5,441    $ 12,397  $  (3,850) $   9,070  $  14,133  $  (4,563) $ (6,571) $ (8,617) $ (9,300)
                         ========    ========  =========  =========  =========  =========  ========  ========  ========
 Pro forma net income
  per share(1).......... $   0.59                         $     .98
                         ========                         =========
<CAPTION>
                                                                                      DECEMBER 31,
                                                                     --------------------------------------------------
                            JUNE 30, 1996                                         COMBINED HISTORICAL
                         ---------------------                       --------------------------------------------------
                                     COMBINED
                         PRO FORMA  HISTORICAL                         1995       1994       1993      1992      1991
                         ---------  ----------                       ---------  ---------  --------  --------  --------
<S>                      <C>        <C>                             <C>        <C>        <C>       <C>       <C>
BALANCE SHEET DATA:
 Real estate assets,
  before accumu-
  lated depreciation and
  amortization.......... $229,410    $193,110                        $ 191,744  $ 190,720  $189,079  $202,941  $201,873
 Total assets...........  159,002     121,825                          121,171    130,624   134,920   145,979   153,073
 Mortgages and loans....   75,000     204,601                          206,858    222,038   218,769   221,921   216,558
 Total liabilities......   85,323     217,108                          224,301    242,887   232,063   232,351   223,678
 Minority interest......   11,199
 Stockholders' equity
  (deficit).............   62,480     (95,283)                        (103,130)  (112,263)  (97,143)  (86,372)  (70,605)
</TABLE>
 
<TABLE>
<CAPTION>
                            SIX MONTHS ENDED JUNE 30,               YEAR ENDED DECEMBER 31,
                          --------------------------------  ------------------------------------------
                                      COMBINED HISTORICAL                   COMBINED HISTORICAL
                          PRO  FORMA  --------------------  PRO FORMA  -------------------------------
                             1996       1996       1995       1995       1995       1994       1993
                          ----------  ---------  ---------  ---------  ---------  ---------  ---------
<S>                       <C>         <C>        <C>        <C>        <C>        <C>        <C>
OPERATING DATA:
 Funds from
  Operations(2).........    $11,023      $3,561       $163    $19,911     $2,723     $2,330     $2,419
 Office Properties:
 Square footage.........  1,463,028   1,156,787  1,156,787  1,463,028  1,156,787  1,156,787  1,156,787
 Average occupancy......       94.1%       93.2%      87.2%      89.3%      87.1%      87.6%      82.4%
 Industrial Properties:
 Square footage.........    916,570     916,570    916,570    916,570    916,570    916,570    916,570
 Average occupancy......       98.4%       98.4%      98.4%      98.4%      98.4%      79.7%      77.6%
</TABLE>
- -------
(1) Pro forma net income per share equals pro forma net income divided by the
    9,260,000 shares of Common Stock offered hereby.
(2) Industry analysts generally consider Funds from Operations an alternative
    measure of performance of an equity REIT. As defined by the National
    Association of Real Estate Investment Trusts ("NAREIT"), Funds from
    Operations represents net income (loss) before minority interest of unit
    holders (computed in accordance with GAAP), excluding gains (or losses)
    from debt restructuring and sales of property, plus real estate related
    depreciation and amortization (excluding amortization of deferred
    financing costs) and after adjustments for unconsolidated partnerships and
    joint ventures. For all periods presented, depreciation and amortization
    and, in 1995 and 1994, gain on extinguishment of debt, were the only non-
    cash adjustments. Funds from Operations should not be considered as an
    alternative for net income as a measure of profitability nor is it
    comparable to cash flows provided by operating activities determined in
    accordance with GAAP.
 
                                      49
<PAGE>
 
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
  The following discussion should be read in conjunction with the "Selected
Financial Data" and the Combined Financial Statements for the Kilroy Group and
notes thereto appearing elsewhere in this Prospectus. The Combined Financial
Statements of the Kilroy Group are comprised of the operations, assets and
liabilities of the Properties other than the Acquisition Properties. As part
of the Formation Transactions, the Properties will be contributed to the
Operating Partnership, of which the Company will be the sole general partner
and the beneficial owner of an approximately 84.8% interest. As a result, for
accounting purposes, the financial information of the Operating Partnership
and the Company will be consolidated.
 
RESULTS OF OPERATIONS
 
 Year Ended December 31, 1994 Compared to Year Ended December 31, 1993
 
  Total revenues decreased $2.5 million, or 7.2%, for the year ended December
31, 1994 compared to the year ended December 31, 1993. Revenues from base
rents decreased $1.6 million, or 5.6%, to $27.5 million for the year ended
December 31, 1994 compared to $29.1 million for the year ended December 31,
1993, due to a lease renegotiation resulting in a lower rent rate effective
June 1, 1994 for a lease on office space in the parking structure at Kilroy
Airport Center at El Segundo, partially offset by continuing leasing activity
at Kilroy Airport Center Long Beach. Tenant reimbursements decreased to
$1.5 million in 1994 from $3.5 million in 1993, due principally to a $1.5
million refund to tenants in 1994 for property tax refunds (for the tax years
1990 through 1994) which were recorded by the Company in 1994. Parking
revenues were approximately $1.2 million for both 1994 and 1993. Development
fees increased $0.2 million, or 22.4%, to $0.9 million in 1994, resulting
primarily from the commencement in February 1994 of preliminary design work on
the Riverside Judicial Center. Other income increased $0.9 million, to
$1.1 million in 1994 from $0.2 million in 1993, primarily as a result of
interest income of $0.4 million on the property tax refunds recorded in 1994
and $0.3 million of lease termination fees ($0.2 million at Kilroy Airport
Center at El Segundo and $0.1 million at Kilroy Airport Center Long Beach).
 
  Expenses in 1994 decreased $2.7 million, or 6.4%, to $38.7 million compared
to $41.4 million in 1993. Property expenses increased $0.4 million, or 8.2%,
principally from increased utility costs and increases in employee wages and
benefits. Real estate taxes decreased $3.4 million to a credit balance of
$0.9 million in 1994 from $2.5 million in 1993, primarily due to property tax
refunds of $2.4 million (for the tax years 1990 through 1994) recorded by the
Company in 1994. The $0.2 million decrease in ground rent expense to $0.6
million in 1994 from $0.8 million in 1993 resulted from a renegotiation of the
ground lease for Phase III of Kilroy Airport Center Long Beach effective July
1, 1994. General and administrative expenses increased $1.4 million, to
$2.4 million in 1994 from $1.0 million in 1993, principally due to a
$0.6 million increase in the allowance for uncollectible rent attributable to
a single tenant and a $0.3 million penalty in 1994 for late payment of
property taxes. Interest expense decreased $0.4 million, to $22.7 million in
1994 due to a decrease in the interest rate on the variable rate mortgage
secured by Kilroy Airport Center Long Beach. Depreciation and amortization
decreased $0.3 million to $8.7 million in 1994 as a result of certain assets
becoming fully amortized.
 
  The net loss decreased $2.0 million to $4.6 million in 1994 compared to a
net loss of $6.6 million in 1993, due primarily to a gain on extinguishment of
debt of $1.8 million in 1994 and, to a limited extent, the net effect of the
items discussed above.
 
 Year Ended December 31, 1995 Compared to Year Ended December 31, 1994
 
  Total revenues increased $6.2 million, or 19.2%, for the year ended December
31, 1995 compared to the year ended December 31, 1994. Revenues from base
rents increased $0.8 million, or 2.8%, to $28.3 million in 1995 from $27.5
million in 1994, due to the continued leasing of Kilroy Airport Center Long
Beach and the effect of 12-months' rental for the Industrial Property located
at 2265 E. El Segundo Boulevard compared to four-months' rental in 1994,
offset in part by a full year of the lower rent rate for office space in the
parking
 
                                      50
<PAGE>
 
structure at Kilroy Airport Center at El Segundo effective June 1, 1994.
Tenant reimbursements increased to $2.7 million in 1995 from $1.5 million in
1994 due principally to the 1994 $1.5 million refund in 1994 to tenants for
property tax refunds. Parking revenues increased to $1.4 million in 1995 from
$1.2 million in 1994 due to recognition of 12-months' parking income for
Kilroy Airport Center Long Beach in 1995 compared to two months in 1994,
together with increased tenant parking revenues at Kilroy Airport Center at El
Segundo. Revenues from development fees increased $0.3 million, to $1.2
million in 1995 from $0.9 million in 1994, primarily due to the continuing
design work for the Riverside Judicial Center. Revenues for 1995 include a
gain on the sale of air rights of $4.5 million at Kilroy Airport Center at El
Segundo. See Note 2 to the Combined Financial Statements. Other income
decreased $0.7 million to $0.4 million during 1995 compared to 1994, primarily
as a result of nonrecurring interest income and lease termination fees
received in 1994.
 
  Expenses in 1995 increased $0.9 million, or 2.0%, to $39.6 million. Property
operating expenses increased $0.7 million, or 15.0%, primarily due to
increased utility costs, increases in employee wages and benefits and a $0.3
million special management fee paid to Kilroy Industries to cover costs of the
loan renegotiation at Kilroy Airport Center at El Segundo. Real estate taxes
increased $2.1 million, to $1.1 million in 1995 from a credit balance of $0.9
million in 1994, due to the $2.4 million property tax refund recorded by the
Company in 1994. General and administrative expenses decreased $0.4 million,
or 14.8%, to $2.0 million in 1995 from $2.4 million in the 1994 period,
primarily due to a $0.3 million penalty for late payment of property taxes in
1994. Interest expense decreased $1.2 million to $21.5 million in 1995 from
$22.7 million in 1994 due to the September 1995 extension of the mortgage on
Kilroy Airport Center at El Segundo at a lower interest rate and the
forgiveness of certain debt, offset in part by the effect of higher interest
rates on the variable rate mortgage secured by Kilroy Airport Center Long
Beach. See Note 4 to the Combined Financial Statements. Ground lease expense
decreased $0.1 million to $0.5 million in 1995, reflecting the effect of 12
months' reduction of ground rent for Phase III of Kilroy Airport Center Long
Beach compared to six months in 1994. The $0.3 million increase in development
expenses relates to increased costs associated with development services
income. The $0.4 million decrease in depreciation expense to $8.3 million in
1995 results from certain assets becoming fully amortized.
 
  Net income increased $18.7 million to $14.1 million in 1995 compared to a
net loss of $4.6 million in 1994, primarily due to the sale of air rights
discussed above and a $13.4 million increase in gains on extinguishment of
debt to $15.2 million in 1995 compared to $1.8 million in 1994.
 
 Six Months Ended June 30, 1996 Compared to Six Months Ended June 30, 1995
 
  Total revenues increased $1.1 million, or 6.7%, for the six months ended
June 30, 1996 compared to the same period for 1995. Revenues from base rents
increased $0.9 million, or 6.4%, to $14.8 million in the 1996 period compared
to $13.9 million in the 1995 period, due to the continued leasing of various
properties, including the signing of a new lease in the 1996 period at Kilroy
Airport Center Long Beach which alone resulted in a $0.5 million incremental
increase in the 1996 period. Tenant reimbursements and parking revenues
increased to $1.6 million and $0.8 million, respectively, in the 1996 period
compared to $1.3 million and $0.7 million for the same period in 1995. The
overall $0.4 million increase is primarily due to increased billable operating
expenses resulting from new leases. Revenues from development and management
fees decreased $0.2 million to $0.5 million in 1996 from $0.7 million in 1995
primarily due to the completion of major design work for the courthouse in
Riverside Judicial Center and the infrastructure for the proposed Calabasas
Park Centre.
 
  Expenses in the six months ended June 30, 1996 decreased by $2.2 million, or
10.9%, to $18.3 million compared to $20.5 million in the 1995 period. Property
expenses increased $0.1 million, or 5.8%, due principally to higher
maintenance costs in 1996 resulting from increased occupancy in 1996.
Development expenses increased $0.1 million, or 26.3%, from $0.4 million in
the first six months of 1995 to $0.5 million for the same period in 1996
primarily due to increases in wages. Interest expense decreased $2.4 million,
or 20.3%, to $9.4 million in 1996 from $11.8 million in 1995, primarily as a
result of the forgiveness and restructuring of certain debt in 1995 and 1996
(see Note 4 to the Kilroy Group Combined Financial Statements).
 
                                      51
<PAGE>
 
  Net income was $12.4 million for the six months ended June 30, 1996 compared
to a net loss of $3.8 million for the same period in 1995, due primarily to
the decreases in debt and interest expense and the extraordinary gain of $12.3
million referred to above for the 1996 period.
 
LIQUIDITY AND CAPITAL RESOURCES
 
  Upon the consummation of the Offering and the Formation Transactions and the
use of proceeds therefrom, the Company will have (i) acquired the Acquisition
Properties, (ii) reduced its total indebtedness by approximately $129.6
million and (iii) established working capital of approximately $0.9 million.
The Company intends to obtain a written commitment for a $100.0 million Credit
Facility, which the Company expects to enter into concurrently with the
consummation of the Offering. The Credit Facility will be used primarily to
finance acquisitions of additional properties and to finance the development
of properties, although a portion may be used for general working capital
purposes. See "The Financing--The Credit Facility."
 
  The Company anticipates that distributions will be paid from cash available
for distribution, which is expected to exceed cash historically available for
distribution as a result of the reduction in debt service anticipated to
result from the repayment of indebtedness. The Company presently intends to
make distributions quarterly, subject to the discretion of the Board of
Directors. Amounts accumulated for distribution will be invested by the
Company primarily in interest-bearing accounts and short-term, interest-
bearing securities, which are consistent with the Company's intention to
qualify for taxation as a REIT. Such investments may include, for example,
obligations of the Government National Mortgage Association, other
governmental agency securities, certificates of deposit and interest-bearing
bank deposits.
 
  The Company expects to meet its short-term liquidity requirements generally
through its initial working capital, net cash provided by operations and
additional debt or equity financings. The Company estimates that for the 12
months ending June 30, 1997 it will incur approximately $957,000 of expenses
attributable to non-incremental revenue generating tenant improvements and
leasing commissions and $150,000 of capital expenditures not reimbursed by
tenants. In connection with the Formation Transactions, the Company will pay
to Hughes Space & Communications an aggregate of approximately $1.5 million in
connection with the amendment and/or extension of leases of office space at
the Office Properties located at Kilroy Airport Center, including $500,000 in
connection with a tenant improvement allowance for the properties located at
2240 and 2250 E. Imperial Highway and the balance in connection with the
cancellation of an option to purchase an equity interest in the Office
Properties located at Kilroy Airport Center at El Segundo. See "Distribution
Policy." The Company believes that it will have sufficient capital resources
to satisfy its obligations during the 12-month period following completion of
the Offering, and that its net cash provided by operations will be adequate to
meet both operating requirements and expected distributions by the Company in
accordance with REIT requirements.
 
  The Company expects to meet certain of its long-term liquidity requirements,
including the repayment of long-term debt of approximately $75.0 million (less
scheduled principal repayments) in 2003 and possible property acquisitions and
development, through long-term secured and unsecured borrowings and the
issuance of debt securities or additional equity securities of the Company or,
possibly in connection with acquisitions of land or improved properties, the
issuance of Units of the Operating Partnership.
 
  The Phase I Environmental Assessments of the Properties have not revealed
any environmental liability that the Company believes would have a material
adverse effect on the Company's business, assets or results of operations
taken as a whole, nor is the Company aware of any such material environmental
liability. See "Risk Factors--Government Regulations--Environmental Matters"
and "Business and Properties--Government Regulations--Environmental Matters."
 
                                      52
<PAGE>
 
HISTORICAL CASH FLOWS
 
  Historically, the Kilroy Group's principal sources of funding for operations
and capital expenditures were cash flow from operating activities and secured
debt financings. The Kilroy Group incurred net losses before extraordinary
items in each of the last five years and for the six-month period ended June
30, 1996. However, after adding back depreciation and amortization, the
Properties have generated positive net operating cash flows for the last four
years.
 
  The Company's net cash provided by operating activities increased to $7.1
million for the year ended December 31, 1994 from $5.2 million for the same
period in 1993 primarily as a result of an increase in the 1994 period in
rents received in advance and tenant security deposits. The Company's net cash
from operating activities was substantially unchanged from the year ended
December 31, 1994 compared to the same period in 1995, with $7.1 million in
the 1994 period and $7.2 million in the 1995 period. The Company's net cash
from operating activities was $0.9 million in the first six months of 1996.
Such amount was less than one-half of the 1995 period amount due to increases
in tenant receivables, other assets, and a reduction of accounts payable and
accrued property taxes in 1996.
 
  Net cash received from investing activities of $2.2 million for the year
ended December 31, 1993 decreased to net cash used in investing activities of
$1.6 million for the same period in 1994 due to the receipt in the 1993 period
of a $2.7 million reimbursement of tenant improvements. Net cash used in
investing activities decreased $0.6 million to $1.0 million for the year ended
December 31, 1995 from $1.6 million for the same period in 1994 due to a
decrease in the level of tenant improvement activity. Net cash used in
investing activities increased $1.0 million to $1.4 million in the six months
ended June 30, 1996 from $0.4 million in the 1995 period primarily due to an
increase in the level of tenant improvement activity.
 
  The Company's cash flows used in financing activities decreased $2.0 million
to $5.4 million from $7.4 million for the year ended December 31, 1993 as a
result of net borrowings of $5.1 million during the year ended December 31,
1994 compared to a net repayment of $3.2 million of debt in the 1993 period,
together with an increase in deemed distributions to partners to $10.6 million
during the year ended December 31, 1994 compared to $4.2 million in the 1993
period. Cash flows used in financing activities decreased $0.8 million to $6.2
million for the year ended December 31, 1995 compared to net cash used in
financing activities of $5.4 million for the same period in 1994 as result of
net repayments of debt in the 1995 period compared to net borrowings in the
1994 period and a $5.6 million decrease in deemed distributions to partners.
Cash flows provided by financing activities was $0.5 million for the six
months ended June 30, 1996 consisting of net proceeds from issuance of debt of
$5.0 million, less $4.5 million in distributions to partners.
 
FUNDS FROM OPERATIONS
 
  Industry analysts generally consider Funds from Operations, as defined by
NAREIT, an alternative measure of performance of an equity REIT. Funds from
Operations is defined by NAREIT to mean net income (loss) determined in
accordance with GAAP, excluding gains (or losses) from debt restructuring and
sales of property, plus depreciation and amortization (other than amortization
of deferred financing costs and depreciation of non-real estate assets), and
after adjustment for unconsolidated partnerships and joint ventures. The
Company believes that in order to facilitate a clear understanding of the
combined historical operating results of the Company, Funds from Operations
should be examined in conjunction with net income (loss) as presented in the
audited and unaudited Combined Financial Statements and selected financial
data included elsewhere in this Prospectus. Funds from Operations should not
be considered as an alternative to net income (loss) as an indication of the
Company's performance or to cash flows as a measure of liquidity or the
ability to pay dividends or make distributions.
 
INFLATION
 
  The Company's leases with the majority of its tenants require the tenants to
pay most operating expenses, including real estate taxes and insurance, and
increases in common area maintenance expenses, which reduce the Company's
exposure to increases in costs and operating expenses resulting from
inflation.
 
                                      53
<PAGE>
 
                            BUSINESS AND PROPERTIES
 
GENERAL
 
  Upon the consummation of the Offering and the Formation Transactions, the
Company (through the Operating Partnership) will own ten Office Properties
encompassing an aggregate of approximately 1.5 million rentable square feet
and nine Industrial Properties encompassing an aggregate of approximately
900,000 rentable square feet. All of the Office Properties are located in
prime Southern California suburban submarkets (including a complex of three
Office Properties located adjacent to the Los Angeles International Airport,
presently the nation's second largest air cargo port, and a complex of five
Office Properties located adjacent to the Long Beach Municipal Airport), and
one Industrial Property is located in Phoenix, Arizona. As of June 30, 1996,
the Office Properties were approximately 94.1% leased to 88 tenants and the
Industrial Properties were approximately 98.4% leased to nine tenants. The
Company has developed, managed and leased all but one of the Office Properties
and seven of the nine Industrial Properties. The Company believes that all of
its Properties are well-maintained and, based on recent engineering reports,
do not require significant capital improvements.
 
  In addition to the Office and Industrial Properties, the Company has
development rights with respect to approximately 24 acres of developable land
(net of acreage required for streets), located in Southern California. The
Company also has an exclusive agreement to negotiate to acquire an additional
six acres of developable land (net of acreage reserved for open areas) at the
Thousand Oaks Civic Arts Plaza and Retail Center. See "--Development, Leasing
and Management Activities." Upon consummation of the Offering, the Company
also will have the option to purchase six office properties currently owned by
the Kilroy Group which will not be contributed to the Operating Partnership
immediately upon consummation of the Offering. The Company will have the right
to acquire the option properties under the terms and conditions described
below. All of these properties will be managed by the Company. See "--Excluded
Properties."
 
  In general, the Office Properties are leased to tenants on a full service
basis, with the landlord obligated to pay the tenant's proportionate share of
taxes, insurance and operating expenses up to the amount incurred during the
tenant's first year of occupancy ("Base Year") or a negotiated amount
approximating the tenant's pro rata share of real estate taxes, insurance and
operating expenses ("Expense Stop"). The tenant pays its pro rata share of
increases in expenses above the Base Year or Expense Stop. All leases for the
Industrial Properties are written on a triple net basis, with tenants paying
their proportionate share of real estate taxes, operating costs and utility
costs.
 
  The following table sets forth certain information (on a per net rentable
square foot basis) regarding leasing activity at the Office Properties managed
by the Company (i.e., all of the Office Properties other than the Thousand
Oaks Office Property (as defined) which is being acquired concurrently upon
consummation of the Offering) since January 1, 1992 (based upon an average of
all lease transactions during the respective periods):
 
                               OFFICE PROPERTIES
 
<TABLE>
<CAPTION>
                                  YEAR ENDED DECEMBER 31,          SIX-MONTH
                               --------------------------------  PERIOD ENDED
                                1992     1993    1994     1995   JUNE 30, 1996
                               -------  ------  -------  ------  -------------
<S>                            <C>      <C>     <C>      <C>     <C>
Number of lease transactions
 during period(1).............      18      12       27      17          24
Net rentable square feet
 during period(1)............. 145,102  77,362  322,357  96,574     265,765
Base rent ($)(1)(2)...........   23.86   21.83    19.77   19.67       20.64
Tenant improvements ($)(3)....    5.75   11.10    16.16    6.70       10.83
Leasing commissions ($)(4)....    2.10    3.31     2.84    3.20        3.16
Other concessions ($)(5)......     --      --       --      --          --
Effective rent ($)(6).........   21.34   19.30    17.54   17.58       18.49
Expense stop ($)(7)...........    6.73    6.61     6.94    7.02        7.14
Effective equivalent triple
 net rent ($)(8)..............   14.61   12.69    10.60   10.56       11.35
Occupancy rate at end of
 period (%)...................    75.3%   76.2%    88.6%   88.7%       93.8%
</TABLE>
- --------
(1) Includes only office tenants with lease terms of 12 months or longer.
    Excludes leases for amenity, parking, retail and month-to-month office
    tenants.
 
                                      54
<PAGE>
 
(2) Equals aggregate base rent received over their respective terms from all
    lease transactions during the period, divided by the terms in months for
    such leases, multiplied by 12, divided by the total net rentable square
    feet leased under all lease transactions during the period.
(3) Equals work letter costs net of estimated profit and overhead. Actual
    tenant improvements may differ from estimated work letter costs.
(4) Equals the aggregate of leasing commissions payable to employees and third
    parties based on standard commission rates and excludes negotiated
    commission discounts obtained from time to time.
(5) Includes moving expenses, furniture allowances and other concessions.
(6) Equals aggregate base rent received over their respective terms from all
    lease transactions during the period minus all tenant improvements,
    leasing commissions and other concessions from all lease transactions
    during the period, divided by the terms in months from such leases,
    multiplied by 12, divided by the total net rentable square feet leased
    under all lease transactions during the period.
(7) Equals the amount of real estate taxes, operating costs and utility costs
    which the landlord is obligated to pay on an annual basis. The tenant is
    required to pay any increases above such amount. Expense Stop for 1996 is
    estimated.
(8) Equals effective rent minus Expense Stop.
 
  The following table sets forth certain information (on a per net rentable
square foot basis) regarding leasing activity at the Thousand Oaks Office
Property since January 1, 1992 (based upon an average of all lease
transactions during the respective periods):
<TABLE>
<CAPTION>
                                         YEAR ENDED DECEMBER 31,    SIX-MONTH
                                         -----------------------  PERIOD ENDED
                                         1992 1993  1994   1995   JUNE 30, 1996
                                         ---- ----- ----- ------  -------------
<S>                                      <C>  <C>   <C>   <C>     <C>
Number of lease transactions during pe-
 riod(1)...............................  --       1     1      9          1
Net rentable square feet during peri-
 od(1).................................  --   1,437 2,745 76,266      2,745
Base rent ($)(1)(2)....................  --   25.01 23.40  23.09      24.00
Tenant improvements ($)(3).............  --   16.25   --    5.04        --
Leasing commissions ($)(4).............  --      NA   --    4.90        --
Other concessions ($)(5)...............  --     --    --     --         --
Effective rent ($)(6)..................  --   22.73 23.40  21.42      24.00
Expense stop ($)(7)....................  --    6.45  6.16   6.49       6.16
Effective equivalent triple net rent
 ($)(8)................................  --   16.28 17.24  14.93      17.84
Occupancy rate at end of period
 (%)(9)................................   NA     NA    NA  100.0%     100.0%
</TABLE>
- --------
(1) Includes only office tenants with lease terms of 12 months or longer.
    Excludes leases for amenity, parking, retail and month-to-month office
    tenants.
(2) Equals aggregate base rent received over their respective terms from all
    lease transactions during the period, divided by the terms in months for
    such leases, multiplied by 12, divided by the total net rentable square
    feet leased under all lease transactions during the period.
(3) Equals work letter costs net of estimated profit and overhead. Actual
    tenant improvements may differ from estimated work letter costs.
(4) Equals the aggregate of leasing commissions payable to employees and third
    parties based on standard commission rates and excludes negotiated
    commission discounts obtained from time to time.
(5) Includes moving expenses, furniture allowances and other concessions.
(6) Equals aggregate base rent received over their respective terms from all
    lease transactions during the period minus all tenant improvements,
    leasing commissions and other concessions from all lease transactions
    during the period, divided by the terms in months from such leases,
    multiplied by 12, divided by the total net rentable square feet leased
    under all lease transactions during the period.
(7) Equals the amount of real estate taxes, operating costs and utility costs
    which the landlord is obligated to pay on an annual basis. The tenant is
    required to pay any increases above such amount. Expense Stop for 1996 is
    estimated.
(8) Equals effective rent minus Expense Stop.
(9) Occupancy data is not available for the years ended December 31, 1992,
    1993 and 1994.
 
 
                                      55
<PAGE>
 
  The following table sets forth certain information (on a per net rentable
square foot basis) regarding leasing activity at the Industrial Properties
since January 1, 1992 (based upon an average of all lease transactions during
the respective periods):
 
                             INDUSTRIAL PROPERTIES
 
<TABLE>
<CAPTION>
                                YEAR ENDED DECEMBER 31,           SIX-MONTH
                             --------------------------------    PERIOD ENDED
                              1992     1993    1994    1995    JUNE 30, 1996(1)
                             -------  ------  ------  -------  ----------------
<S>                          <C>      <C>     <C>     <C>      <C>
Number of lease transac-
 tions during period.......        1       1       1        2           0
Net Rentable square feet
 leased during period......  100,000  70,000  76,570  171,550         --
Base rent ($)(2)...........     6.39    6.81    7.23     4.99         --
Tenant improvements
 ($)(3)....................     5.87    0.14    4.49     2.00         --
Leasing commissions
 ($)(4)....................     1.37    1.49    3.49     1.84         --
Other concessions ($)(5)...      --      --      --       --          --
Effective rent ($)(6)......     5.19    6.48    6.44     4.63         --
Expense stop ($)(7)........      --      --      --       --          --
Effective equivalent triple
 net rent ($)(8)...........     5.19    6.48    6.44     4.63
Occupancy rate at end of
 period (%)................     86.0%   77.6%   79.7%    98.4%       98.4%
</TABLE>
- --------
(1) No leasing activity occurred during the six-month period ended June 30,
    1996.
(2) Equals aggregate base rent received over their respective terms from all
    lease transactions during the period, divided by the terms in months for
    such leases, multiplied by 12, divided by the total rentable square feet
    leased under all lease transactions during the period.
(3) Equals work letter costs net of estimated profit and overhead. Actual
    tenant improvements may differ from estimated work letter costs.
(4) Equals the aggregate of leasing commissions payable to employees and third
    parties based on standard commission rates and excludes negotiated
    commission discounts obtained from time to time.
(5) Includes moving expenses, furniture allowances and other concessions.
(6) Equals aggregate base rent received over their respective terms from all
    lease transactions during the period minus all tenant improvements,
    leasing commissions and other concessions from all lease transactions
    during the period, divided by the terms in months from such leases,
    multiplied by 12, divided by the total net rentable square feet leased
    under all lease transactions during the period.
(7) Leases for all Industrial Properties are written on a triple net basis,
    providing for each tenant to be responsible, in addition to base rent, for
    its proportionate share of real estate taxes, operating costs, utility
    costs and other expenses without regard to a base year.
(8) Equals effective rent minus Expense Stop.
 
                                      56
<PAGE>
 
                     THE OFFICE AND INDUSTRIAL PROPERTIES
 
  The following table sets forth certain information relating to each of the
Properties as of December 31, 1995, unless indicated otherwise. This table
gives pro forma effect to a recent extension of one of the leases with Hughes
Space & Communications with respect to two of the Office Properties located at
Kilroy Airport Center at El Segundo as if such lease renewal had occurred on
January 1, 1995. After completion of the Formation Transactions, the Company
(through the Operating Partnership) will own a 100% interest in all of the
Office and Industrial Properties other than the five Office Properties located
at Kilroy Airport Center Long Beach, which are held subject to ground leases
expiring in 2035.
 
<TABLE>
<CAPTION>
                                                                                                        AVERAGE
                                                          PERCENTAGE                         PERCENTAGE  BASE
                                                   NET      LEASED     1995                   OF 1995    RENT
                                                RENTABLE    AS OF      BASE        1995        TOTAL      PER     EFFECTIVE
                                                 SQUARE    12/31/95    RENT      EFFECTIVE      BASE    SQ. FT.    RENT PER
          PROPERTY LOCATION          YEAR BUILT   FEET      (%)(1)   ($000)(2) RENT($000)(3)  RENT (%)  ($)(4)  SQ. FT. ($)(5)
          -----------------          ---------- --------- ---------- --------- ------------- ---------- ------- --------------
 <C>                                 <C>        <C>       <C>        <C>       <C>           <C>        <C>     <C>
 Office Properties:                    
 Kilroy Airport Center at El Segundo   
  2250 E. Imperial Highway(8).......     1983     291,187    80.9      4,316       4,042        13.5     18.32      17.16
  2260 E. Imperial Highway)(9)......     1983     291,187   100.0      7,160       6,545        22.4     24.59      22.48
  2240 E. Imperial Highway(10)         
  El Segundo, California............     1983     118,933   100.0      1,130       1,121         3.5      9.50       9.43
 Kilroy Airport Center Long Beach      
  3900 Kilroy Airport Way(11).......     1987     126,840    94.0      2,282       2,092         7.1     19.14      17.54
  3880 Kilroy Airport Way(11).......     1987      98,243   100.0      1,296       1,022         4.0     13.19      10.40
  3760 Kilroy Airport Way...........     1989     165,278    92.1      3,372       2,807        10.6     22.16      18.45
  3780 Kilroy Airport Way...........     1989     219,745    63.6      3,465       3,005        10.8     24.79      21.50
  3750 Kilroy Airport Way              
  Long Beach, California............     1989      10,457   100.0         75          28         0.2      7.21       2.66
 2829 Townsgate Road                   
  Thousand Oaks, California(11).....     1990      81,158   100.0      1,888       1,760         5.9     23.26      21.69
 185 S. Douglas Street(12)             
  El Segundo, California............     1978      60,000   100.0      1,313         898         4.1     21.89      14.96
                                                ---------   -----     ------      ------       -----     -----      -----
 Subtotal/Weighted Average                      1,463,028    89.3     26,297      23,320        82.1     20.12      17.84
                                                ---------   -----     ------      ------       -----     -----      -----
 Industrial Properties:                
 2031 E. Mariposa Avenue               
  El Segundo, California............     1954     192,053   100.0      1,556       1,296         4.9      8.10       6.75
 3332 E. La Palma Avenue               
  Anaheim, California(15)...........     1966     153,320   100.0        881         790         2.8      5.74       5.16
 2260 E. El Segundo Boulevard          
  El Segundo, California(13)........     1979     113,820   100.0        553         510         1.7      4.86       4.48
 2265 E. El Segundo Boulevard          
  El Segundo, California............     1978      76,570   100.0        554         493         1.7      7.23       6.44
 1000 E. Ball Road                                
  Anaheim, California(14)...........     1956     100,000   100.0        639         519         2.0      6.39       5.19
 1230 S. Lewis Street                  
  Anaheim, California...............     1982      57,730   100.0        303         284         0.9      5.25       4.92
 12681/12691 Pala Drive                
  Garden Grove, California .........     1970      84,700    82.6        476         454         1.5      6.81       6.48
 2270 E. El Segundo Boulevard          
  El Segundo, California(15)........     1975       7,500   100.0        129         129         0.4     17.17      17.17
 5115 N. 27th Avenue                   
  Phoenix, Arizona(16)..............     1962     130,877   100.0        640         612         2.0      4.89       4.68
                                                ---------   -----     ------      ------       -----     -----      -----
 Subtotal/Weighted Average                        916,570    98.4      5,731       5,087        17.9      6.36       5.64    
                                                ---------   -----     ------      ------       -----     -----      -----
 Office & Industrial--All Properties            2,379,598    92.8     32,028      28,407       100.0     14.50      12.86
                                                =========             ======      ======       =====
<CAPTION>
                                                    TENANTS LEASING
                                       PERCENTAGE    10% OR MORE OF
                                         LEASED      NET RENTABLE
                                          AS OF     QUARE FEET PER
                                         6/30/96      PROPERTY
          PROPERTY LOCATION              (%)(6)     AS OF 6/30/96(7)
          -----------------            ----------   -----------------
 <S>                                   <C>        <C> 
 Office Properties:                        
 Kilroy Airport Center at El Segundo       
  2250 E. Imperial Highway(8).......      85.2     Hughes Space & Communications          
                                                   (33.0%)                             
  2260 E. Imperial Highway)(9)......     100.0     Hughes Space & Communications       
  2240 E. Imperial Highway(10)                     (100.0%)                            
  El Segundo, California............     100.0     Hughes Space & Communications         
 Kilroy Airport Center Long Beach                  (94.6%)                             
  3900 Kilroy Airport Way(11).......      94.0     McDonnell  Douglas  Corporation     
                                                   (50.9%), Olympus America, Inc.            
                                                   (18.6%)                             
  3880 Kilroy Airport Way(11).......     100.0     Devry, Inc. (100.0%)                
  3760 Kilroy Airport Way...........      91.2     R.L. Polk & Co. (9.8%)              
  3780 Kilroy Airport Way...........      90.5     SCAN Health Plan  (20.4%), Zelda          
                                                   Fay Walls (12.7%)                          
  3750 Kilroy Airport Way                                                              
  Long Beach, California............      100.0    Oasis Cafe (37.1%),                      
                                                   Keywanfar & Baroukhim (16.1%), 
                                                   SR Impressions (15.0%)         
 2829 Townsgate Road                      
  Thousand Oaks, California(11).....     100.0     Worldcom, Inc. (34.2%), Data Select            
                                                   Systems, Inc. (13.0%), Pepperdine           
                                                   University (12.7%), Anheuser Busch,             
                                                   Inc. (12.0%)                                      
185 S. Douglas Street(12)                         
   El Segundo, California............    100.0     Northwest  Airlines, Inc. (100%)                      
                                         -----           
 Subtotal/Weighted Average                94.1        
                                         -----           
 Industrial Properties:                   
 2031 E. Mariposa Avenue                  
  El Segundo, California............     100.0     Mattel, Inc. (100%)  
 3332 E. La Palma Avenue                           
  Anaheim, California(15)...........     100.0     Furon Co., Inc. (59.2%), Cerplex           
                                                   Group, Inc.(40.8%)                                       
 2260 E. El Segundo Boulevard                      
  El Segundo, California(13)........     100.0     Ace Medical Co. (100%)                                                           
 2265 E. El Segundo Boulevard           
  El Segundo, California............     100.0     MSAS Cargo Intl., Inc. (100%)                  
 1000 E. Ball Road                                                                                                             
  Anaheim, California(14)...........     100.0     Allen-Bradley Company (100%)                                      
 1230 S. Lewis Street                                 
  Anaheim, California...............     100.0     Extron Electronics (100%) 
 12681/12691 Pala Drive                      
  Garden Grove, California .........      82.6     Rank Video Services America, Inc. (82.6%)   
 2270 E. El Segundo Boulevard                
  El Segundo, California(15)........     100.0     Pacific  Southwest Realty (100%)           
 5115 N. 27th Avenue                                  
  Phoenix, Arizona(16)..............     100.0     Festival Markets, Inc.  (100%)
                                         -----           
 Subtotal/Weighted Average                98.4
                                         -----           
 Office & Industrial--All Properties      95.8                                                                              
</TABLE>                                                                    

                                                        (footnotes on next page)
                                      57
<PAGE>
 
- --------
 (1) Based on all leases at the respective property in effect as of December
     31, 1995.
 (2) Total base rent for the year ended December 31, 1995, determined in
     accordance with GAAP. All leases at the Industrial Properties are written
     on a triple net basis. Unless otherwise indicated, all leases at the
     Office Properties are written on a full service gross basis, with the
     landlord obligated to pay the tenant's proportionate share of taxes,
     insurance and operating expenses up to the amount incurred during the
     Base Year or a negotiated Expense Stop. Each tenant pays its pro rata
     share of increases in expenses above the Base Year or Expense Stop.
 (3) Aggregate base rent received over their respective terms from all leases
     in effect at December 31, 1995 minus all tenant improvements, leasing
     commissions and other concessions for all such leases, divided by the
     terms in months for such leases, multiplied by 12. Tenant improvements,
     leasing commissions and other concessions are estimated using the same
     methodology used to calculate effective rent for the Office Properties as
     a whole in the chart on page  .
 (4) Base rent for the year ended December 31, 1995 divided by net rentable
     square feet leased at December 31, 1995.
 (5) Effective rent at December 31, 1995 divided by net rentable square feet
     leased at December 31, 1995.
 (6) Based on all leases dated on or before June 30, 1996.
 (7) Excludes office space leased by the Company.
 (8) For this Property, leases with Hughes Space & Communications, for
     approximately 96,000 rentable square feet, and with SDRC Software
     Products Marketing Division, Inc., for approximately 6,800 rentable
     square feet, are written on a full service gross basis, except that there
     is no Expense Stop.
 (9) For this Property, the lease with Hughes Space & Communications is
     written on a modified full service gross basis under which Hughes Space &
     Communications pays for all utilities and other internal maintenance
     costs with respect to the leased space and, in addition, pays its pro
     rata share of real estate taxes, insurance, and certain other expenses
     including common area expenses.
(10) For this Property, leases with Hughes Space & Communications for
     approximately 101,000 rentable square feet are written on a full service
     gross basis except that there is no Expense Stop.
(11) This property is an Acquisition Property.
(12) For this Property, the lease is written on a triple net basis.
(13) This Industrial Property was vacant until April 1995. The tenant began
     paying rent in mid-October 1995 at an annual rate of $4.86 per rentable
     square foot.
(14) The tenant in this Industrial Property subleased this property on May 15,
     1996 to RGB Systems, Inc. (doing business as Extron Electronics), the
     tenant of the Property located at 1230 S. Lewis Street, Anaheim,
     California, which is adjacent to this Property. The sublease is at an
     amount less than the current lease rate, and the tenant is paying the
     difference between the rent current lease rate and the sublease rate. The
     lease and the sublease terminate in April 1998. Extron Electronics has
     executed a lease for this space from May 1998 through April 2005 at the
     current lease rate. Extron Electronics continues to occupy the space
     located at 1230 S. Lewis Street.
(15) The leases for Cerplex Group, Inc. and Pacific Southwest Realty expired
     on June 30, 1996 and this space is presently available for rent.
(16) This Industrial Property was originally designed for multi-tenant use and
     currently is leased to a single tenant and utilized as an indoor multi-
     vendor retail marketplace.
 
OCCUPANCY AND RENTAL INFORMATION
 
  The following table sets forth the average percentage leased and average
annual base rent per leased square foot for the Properties for the past three
years:
 
<TABLE>
<CAPTION>
                                                                      AVERAGE
                                                                       ANNUAL
                                                                     BASE RENT
                                                         AVERAGE    PER RENTABLE
                                                       PERCENTAGE      SQUARE
    YEAR                                              LEASED (%)(1)  FOOT($)(2)
    ----                                              ------------- ------------
    <S>                                               <C>           <C>
    OFFICE:
     1995............................................     89.4         19.40
     1994............................................     82.6(3)      21.01(3)
     1993............................................     75.7(3)      26.38(3)
    INDUSTRIAL:
     1995............................................     89.0          6.79
     1994............................................     78.7          6.51
     1993............................................     81.8          6.55
</TABLE>
- --------
(1)  Average of beginning and end-of-year aggregate percentage leased.
(2)  Total base rent for the year, determined in accordance with GAAP, divided
     by the average of the beginning and end-of-year aggregate rentable square
     feet leased.
(3)  Excludes data from the Thousands Oaks Office Property which is being
     acquired concurrently with the consummation of the Offering.
 
                                      58
<PAGE>
 
LEASE EXPIRATIONS
 
  The following table sets out a schedule of the lease expirations for the
Office Properties for each of the ten years beginning with 1996, assuming that
none of the tenants exercises renewal options or termination rights:
 
<TABLE>
<CAPTION>
                                       NET      PERCENTAGE OF    ANNUAL      AVERAGE ANNUAL
                                     RENTABLE    TOTAL LEASED     BASE        RENT PER NET
                                   AREA SUBJECT  SQUARE FEET   RENT UNDER RENTABLE SQUARE FOOT
                         NUMBER OF TO EXPIRING  REPRESENTED BY  EXPIRING     REPRESENTED BY
     YEAR OF LEASE       EXPIRING     LEASES       EXPIRING      LEASES         EXPIRING
       EXPIRATION        LEASES(1)  (SQ. FT.)    LEASES(%)(2)  ($000)(3)      LEASES($)(4)
     -------------       --------- ------------ -------------- ---------- --------------------
<S>                      <C>       <C>          <C>            <C>        <C>
7/01/96-12/31/1996......      6        33,798         2.49          778          23.02
              1997......      9        38,297         2.82          875          22.85
              1998......     16        87,795         6.47        2,081          23.71
              1999......     20       228,369        16.83        3,875          16.97
              2000......     19       139,253        10.26        3,148          22.61
              2001(4)...     15       246,019        18.13        4,373          17.78
              2002......      2        83,047         6.12        1,606          19.34
              2003......      2        14,331         1.06          310          21.61
              2004......      4       311,491        22.96        7,731          24.82
              2005 and
              beyond....      6       174,216        12.84        2,850          16.36
                            ---     ---------       ------       ------
    Totals..............     99     1,356,616       100.00       27,628          20.37
                            ===     =========       ======       ======
</TABLE>
- --------
(1) Includes office tenants only. Excludes leases for amenity, retail, parking
    and month-to-month office tenants. Some tenants have multiple leases.
(2) Excludes all space vacant as of December 31, 1995 unless a lease for a
    replacement tenant has been dated on or before June 30, 1996.
(3) Determined based upon aggregate base rent to be received over the term
    divided by the term in months multiplied by 12, including all leases dated
    on or before June 30, 1996. Certain leases became effective subsequent to
    June 30, 1996.
(4) Includes Hughes Space & Communications leases of 96,133 and 11,556 net
    rentable square feet at Kilroy Airport Center at El Segundo. These leases
    expire in October 2001 and are at a triple net base rental rate of $14.04
    per square foot.
 
  The following table sets out a schedule of the lease expirations for the
Industrial Properties for each of the ten years beginning with 1996, assuming
that none of the tenants exercises renewal options or termination rights:
 
<TABLE>
<CAPTION>
                                       NET      PERCENTAGE OF    ANNUAL      AVERAGE ANNUAL
                                     RENTABLE    TOTAL LEASED     BASE        RENT PER NET
                                   AREA SUBJECT  SQUARE FEET   RENT UNDER RENTABLE SQUARE FOOT
                         NUMBER OF TO EXPIRING  REPRESENTED BY  EXPIRING     REPRESENTED BY
     YEAR OF LEASE       EXPIRING     LEASES       EXPIRING      LEASES         EXPIRING
       EXPIRATION         LEASES    (SQ. FT.)    LEASES(%)(1)  ($000)(2)       LEASES($)
     -------------       --------- ------------ -------------- ---------- --------------------
<S>                      <C>       <C>          <C>            <C>        <C>
7/01/96-12/31/1996......      0          --           0.00         --             0.00
              1997......      0          --           0.00         --             0.00
              1998......      1       70,000          8.42         476            6.81
              1999......      0          --           0.00         --             0.00
              2000......      1      192,053         23.09       1,556            8.10
              2001......      1      130,877         15.73         640            4.89
              2002......      0          --           0.00         --             0.00
              2003......      0          --           0.00         --             0.00
              2004......      1       76,570          9.21         554            7.23
              2005 and
              beyond....      4      362,296         43.56       2,039            5.63
                            ---      -------        ------       -----
    Totals..............      8      831,796        100.00       5,265            6.33
                            ===      =======        ======       =====
</TABLE>
- --------
(1)  Excludes all space vacant as of December 31, 1995 unless a lease for a
     replacement tenant has been dated on or before June 30, 1996.
(2)  Determined based upon aggregate base rent to be received over the term
     divided by the term in months multiplied by 12, including all leases dated
     on or before June 30, 1996.
 
                                      59
<PAGE>
 
TENANT INFORMATION
 
  The Company's tenants include significant corporate and other commercial
enterprises representing a range of industries including, among others,
satellite communications, manufacturing, entertainment, banking, insurance,
telecommunications, health care, computer software, finance, engineering,
technology, legal and accounting. The following table sets forth information
as to the Company's largest tenants based upon annualized rental revenues for
the year ended December 31, 1995:
 
<TABLE>
<CAPTION>
                                         PERCENTAGE OF
                            TENANT         COMPANY'S
                            ANNUAL           TOTAL                        LEASE
                          BASE RENTAL     BASE RENTAL  INITIAL LEASE    EXPIRATION
                         REVENUE($)(2)    REVENUES(%)     DATE(3)          DATE
                         -------------   ------------- -------------- --------------
<S>                      <C>             <C>           <C>            <C>
Office Tenants(1):
- -----------------
  Hughes Electronic
   Corporation's Space &
   Communications
   Company(4)...........   9,757,877(5)      29.59        August 1984   January 1999
  Northwest Airlines,
   Inc..................   1,313,418          3.98        August 1978  February 2001
  Devry, Inc............   1,296,270          3.93      November 1994   October 2009
  McDonnell Douglas
   Corporation..........   1,149,922          3.49      February 1992   January 2002
  SCAN Health Plan(6)...     941,325          2.85      February 1996       May 2006
  Zelda Fay Walls.......     823,896          2.50        August 1989    August 2000
  Worldcom, Inc.........     674,592          2.05       January 1995  December 1999
  C.E.O., The Walls
   Group................     456,220          1.38       October 1991 September 2002
  Olympus America,
   Inc..................     443,375          1.34     September 1993  December 1998
  SITA..................     378,359          1.15          June 1984       May 1999
                          ----------         -----
    Total...............  17,235,254         52.27
                          ==========         =====
Industrial Tenants:
- ------------------
  Mattel, Inc...........   1,556,321          4.72           May 1990   October 2000
  Festival Markets,
   Inc. ................     640,348          1.94           May 1991       May 2001
  Allen-Bradley Company
   (Rockwell)...........     639,432          1.94           May 1992     April 1998
  MSAS Cargo
   International Inc....     553,934          1.68     September 1994    August 2004
  Ace Medical Co. ......     553,300          1.68         April 1995     April 2006
  Furon Co., Inc........     543,180          1.65      February 1990      July 2005
  Rank Video Services
   America, Inc. .......     476,358          1.44       October 1984       May 1998
  Extron Electronics....     302,930          0.92      February 1995   January 2005
                          ----------         -----
    Total...............   5,265,803         15.97
                          ==========         =====
</TABLE>
- --------
(1) Table excludes the lease with LACTC (total base rent of $449,935) which
    expired on April 30, 1996, the lease with Cerplex Group, Inc./Incert
    (total base rent of $337,530) which expired on June 30, 1996, and the
    lease with Pacific Southwest Realty (total base rent of $128,783) which
    expired on June 30, 1996.
(2) Determined in accordance with GAAP.
(3) Represents date of first relationship between tenant and the Kilroy Group.
(4) Includes Hughes Space & Communication's leases of (i) 96,133 and 11,556
    net rentable square feet at Kilroy Airport Center at El Segundo which
    expire in October 2001, (ii) 286,151 net rentable square feet at Kilroy
    Airport Center at El Segundo which expires in July 2004 and (iii) 100,978
    net rentable square feet at Kilroy Airport Center at El Segundo which
    expires in January 1999.
(5) Tenant annual base rental revenue for Hughes Space & Communications gives
    pro forma effect to the recent extension of the tenant lease with respect
    to 96,133 rentable square feet of office space located at 2250 E. Imperial
    Highway (along with 11,556 rentable square feet located at 2240 E.
    Imperial Highway) as if such lease renewal had occurred on January 1,
    1995. See "Business and Properties--Kilroy LAX."
(6) Tenant executed leases during 1995 representing approximately 44,825
    square feet effective on February 15, 1996. Base rental revenue figure
    included on a contract basis.
 
 
                                      60
<PAGE>
 
OFFICE PROPERTIES
 
  All but one of the Office Properties are Class A office buildings. Each of
the Kilroy LAX and Kilroy Long Beach (each as defined) Office Properties was
designed and developed to above-standard specifications to accommodate the
long-term needs of tenants and include features such as extra-floor loading
capacity and extra-high ceilings. Each of the Kilroy LAX and Kilroy Long Beach
Office Properties also was designed with an emphasis on long-term operating
efficiency and tenant comfort and includes above-standard climate controls,
redundant telecommunication capability and utility leads, on-site management
and security, covered parking, heliports and retail services, all in
professionally landscaped environments. The Office Properties range in size
from two to 12 stories and are easily accessible from major highways and
airports. Management believes that as a result of these factors the Office
Properties achieve among the highest rent, occupancy and tenant retention
rates when compared to other properties within their respective submarkets and
in neighboring submarkets. Management believes that the location, quality of
construction and amenities at the complexes as well as the Company's
reputation for providing a high level of tenant service have enabled the
Company to attract and retain a national tenant base.
 
  Kilroy LAX. The Company developed, owns, leases and manages three Office
Properties at Kilroy Airport Center at El Segundo ("Kilroy LAX"), a Class A
high-rise, multi-tenant corporate office complex situated in what the Company
considers to be the premier location in El Segundo immediately adjacent to Los
Angeles International Airport ("LAX"), the new light rail system servicing Los
Angeles County and the new I-105 Freeway with a freeway off-ramp and, upon
completion, freeway on-ramp providing immediate access to and from the
project's parking facilities. Kilroy LAX was built in 1983 to high quality
specifications to address the anticipated demands of the submarket's aerospace
and high technology tenants. The Company believes Kilroy LAX has the premier
location in the El Segundo office submarket for a number of reasons,
including: (i) unobstructed views of LAX, West Los Angeles and Downtown Los
Angeles; (ii) excellent access to LAX, the new I-105 Freeway and the new light
rail system; (iii) close proximity to corporate office users including Hughes
Space & Communications and its satellite manufacturing facility, and other
related enterprises such as DirectTV; and (iv) for tenants with their names on
the Property, visibility to freeway and airline travelers.
 
  The complex is comprised of two 12-story towers and a 13-level parking
structure with two floors of office space on top, encompassing an aggregate of
approximately 700,000 rentable square feet, of which 93.9% was leased as of
June 30, 1996. Kilroy LAX features fiber optic/telecommunications dual
redundancy (one of the few properties in Southern California so equipped) and
multiple lead-lines for both water and power, thereby mitigating the risk of
temporary loss of such services to the facility. The Property was designed and
constructed with above-standard floor loadings and floor-to-ceiling heights to
accommodate the weight and raised floors requirements of computer and other
equipment. The facility is climate controlled in smaller areas which, while
increasing tenant comfort, allows for separate thermostat controls for areas
housing temperature sensitive equipment and reduces costs for after-hour
operations. The facility was designed toward tenant efficiency and convenience
and features an above-standard ratio of elevators to rentable square feet and
provides 24-hour on-site security and management, private dual heliports,
shuttle service to LAX and on-site retail, banking and dining facilities. In
addition, the two 12-story towers are joined by an atrium and are
professionally landscaped creating a pleasant environment. In addition, the
facility has been recognized by the local utility for its energy efficient
heating, ventilating and air conditioning systems which reduce operating costs
for both the Company and its tenants. Management believes because of these and
other high quality features, Kilroy LAX continues to attract long-term major
corporate tenants at rates above those offered by other facilities in the El
Segundo and neighboring submarkets. The occupancy rates for Kilroy LAX as of
the years ended December 31, 1993 through 1995, and the six-month period ended
June 30, 1996, were 90.8%, 91.6%, 92.1% and 93.9%, respectively.
 
  Major tenants of the facility include Hughes Space & Communications (the
Company's largest tenant), the Federal Aviation Administration and Realtime
Associates. Hughes Space & Communications has been a tenant at Kilroy LAX
since its development in 1983 and, over the past five years, has consolidated
operations into its owned facilities in El Segundo (which includes its
satellite manufacturing facility) and into leased facilities at
 
                                      61
<PAGE>
 
Kilroy LAX which also serves as its headquarters. In addition, Hughes Space &
Communications has invested substantial amounts in tenant improvements,
including approximately $3.3 million during the year ended December 31, 1994
and $23.5 million since 1984, and repeatedly has renewed leases at the
facilities, including one lease for approximately 101,000 rentable square feet
which has been renewed twice. Hughes Space and Communications is a major
employer and owner of technical facilities in El Segundo, including facilities
for the development of satellite technology and its applications, such as
DirecTV.
 
  Because the book value of the Office Property located at 2240 E. Imperial
Highway will be in excess of 10% of the Company's total assets, additional
information regarding this Property is presented below. The information
presented below gives pro forma effect to the recent extension of the tenant
lease with Hughes Space & Communications with respect to this Office Property
as if such lease renewal had occurred on January 1, 1995.
 
  The property located at 2240 E. Imperial Highway had an occupancy rate of
100.0% for each of the years ended December 31, 1991 through 1995. As of June
30, 1996, Hughes Space & Communications occupied approximately 94.6% of the
Property's net rentable square feet under two leases. Under the principal
lease for this space, Hughes Space & Communications commenced occupancy of
100,978 square feet on August 11, 1986 and renewed the lease on February 1,
1989 and again on June 1, 1994. In connection with the latter renewal, Hughes
made a one time payment of $4,000,000 to the Company in consideration of a
lease amendment to relieve Hughes Space & Communications of the obligation to
remove certain tenant improvements upon termination of the lease. The current
lease term under this lease expires on January 31, 1999, subject to a five-
year option to renew at fair market value, but not less than $15.84 per annum
per net rentable square foot, on a triple net basis. Hughes Space &
Communications also leases 11,556 rentable square feet (along with the 96,133
rentable square feet located at 2250 E. Imperial Highway) under a second lease
which expires October 31, 2001, at an annualized triple net base rental rate
of $14.04 and, for the first year of the lease term, the tenant's allocable
share of operating costs shall not exceed $7.32 per rentable square foot. The
lease also is subject to a five-year option to renew at fair market value,
adjusted bi-annually for CPI adjusted increases in base rent. The total annual
rental income per net rentable square foot for the years ended December 31,
1991 through December 31, 1995 was $23.17, $24.42, $25.22, $17.15 and $11.83,
respectively. The following table sets forth for such Property for each of the
ten years following the date of Offering (i) the number of tenants whose
leases will expire, (ii) the total net rentable square feet covered by such
leases, (iii) the percentage of total leased net rentable square feet
represented by such leases, (iv) the annual base rent represented by such
leases and (v) the average annual rent per net rentable square foot
represented by such leases.
 
<TABLE>
<CAPTION>
                                                   PERCENTAGE OF
                                                   TOTAL LEASED                           AVERAGE ANNUAL
                                                   NET RENTABLE                              RENT PER
                                    NET RENTABLE    SQUARE FEET                            NET RENTABLE
        YEAR OF          NUMBER OF SQUARE FOOTAGE   REPRESENTED                            SQUARE FOOT
         LEASE            LEASES     SUBJECT TO     BY EXPIRING  ANNUAL BASE RENT UNDER   REPRESENTED BY
       EXPIRATION        EXPIRING  EXPIRING LEASES   LEASES(%)   EXPIRING LEASES ($)(1) EXPIRING LEASES($)
       ----------        --------- --------------- ------------- ---------------------- ------------------
<S>                      <C>       <C>             <C>           <C>                    <C>
1996....................      0            --            --                   --                 --
1997....................      0            --            --                   --                 --
1998....................      0            --            --                   --                 --
1999....................      1(2)     100,978          86.4           $1,085,716             $10.75
2000....................      0            --
2001....................      2(3)      15,898          13.6              196,670              12.37
2002....................      0            --            --                   --                 --
2003....................      0            --            --                   --                 --
2004....................      0            --            --                   --                 --
2005....................      0            --            --                   --                 --
                            ---        -------         -----           ----------
    Totals..............      3        116,876(4)      100.0           $1,282,386             $10.97
                            ===        =======         =====           ==========
</TABLE>
 
                                      62
<PAGE>
 
- --------
(1) Determined based upon aggregate base rent to be received over the term
    divided by the term in months multiplied by 12, including all leases dated
    on or before June 30, 1996.
(2) The terms of this lease are described in the text preceding this table.
(3) The terms of a lease representing 11,556 rentable square feet are
    described in the text preceding this table.
(4) The aggregate square footage reflected in each of the respective leases
    differs from the actual aggregate square footage for this Property of
    118,933 as shown on the table under the caption "The Office and Industrial
    Properties." Subsequent to the execution of the leases, the Property was
    remeasured at a larger aggregate number of square feet than is reflected
    in the executed leases.
 
  The Company's tax basis in the Property for federal income tax purposes as
of December 31, 1995 was approximately $4.1 million (net of accumulated
depreciation and reductions in depreciable basis). The Property is depreciated
using the modified accelerated cost recovery system straight-line method,
based on an estimated useful life ranging from 31 1/2 years to 39 years,
depending upon the date of certain capitalized improvements to the Property.
For the year ended December 31, 1995, the estimated average depreciation rate
for this Property under the modified accelerated cost recovery system was
4.3%. For the 12-month period ending June 30, 1996, the Company was assessed
property taxes on this Property at an effective annual rate of approximately
1.0%. Property taxes on this Property for the 12-month period ending June 30,
1996 totaled $128,341. Management does not believe that any capital
improvements made during the 12-month period immediately following the
Offering should result in an increase in annual property taxes.
 
  Because the gross revenues for the Office Property located at 2250 E.
Imperial Highway for the year ended December 31, 1995 were in excess of 10% of
the aggregate gross revenues for all of the Properties, additional information
regarding this Property is presented below. The information presented below
gives pro forma effect to the recent extension of the tenant lease with Hughes
Space & Communications with respect to this Office Property as if such lease
renewal had occurred on January 1, 1995.
 
  The property located at 2250 E. Imperial Highway had an occupancy rate of
84.0%, 82.5%, 77.8%, 79.8% and 80.9% as of the years ended December 31, 1991
through 1995, respectively. As of June 30, 1996, Hughes Space & Communications
occupied 33.0% of the Property's net rentable square feet. The Property's
other tenants include companies engaged in the communications, technology,
transportation and healthcare industries. Hughes Space & Communications
commenced occupancy of 96,133 rentable square feet on November 1, 1986 and has
entered into an agreement to renew this space (along with the 11,556 square
feet located at 2240 E. Imperial Highway) through October 31, 2001, at a
triple net annual base rental rate of $14.04 per square foot and, for the
first year of the lease term, the tenant's allocable share of operating costs
shall not exceed $7.32 per rentable square foot. The lease also is subject to
a five-year option to renew at fair market value, adjusted bi-annually for CPI
increases in base rent. The total annual rental income per net rentable square
foot for the years ended December 31, 1991 through December 31, 1995 was
$17.82, $18.73, $19.48, $18.19 and $18.86, respectively. The following table
sets forth for such Property for each of the ten years following the date of
the Offering (i) the number of tenants whose leases will expire, (ii) the
total net rentable square feet covered by such leases, (iii) the percentage of
total leased net rentable square feet represented by such leases, (iv) the
annual base rent represented by such leases and (v) the average annual rent
per net rentable square foot represented by such leases.
 
                                      63
<PAGE>
 
<TABLE>
<CAPTION>
                                                    PERCENTAGE OF
                                                    TOTAL LEASED                          AVERAGE ANNUAL
                                                    NET RENTABLE                             RENT PER
                                     NET RENTABLE    SQUARE FEET                           NET RENTABLE
                          NUMBER OF SQUARE FOOTAGE   REPRESENTED       ANNUAL BASE         SQUARE FOOT
                           LEASES     SUBJECT TO     BY EXPIRING       RENT UNDER         REPRESENTED BY
YEAR OF LEASE EXPIRATION  EXPIRING  EXPIRING LEASES LEASES(%)(1)  EXPIRING LEASES($)(2) EXPIRING LEASES($)
- ------------------------  --------- --------------- ------------- --------------------- ------------------
<S>                       <C>       <C>             <C>           <C>                   <C>
1996....................       6         32,212          11.9          $  705,336             $21.90
1997....................       3          4,385           1.6              83,025              18.93
1998....................       6         23,033           8.5             464,705              20.18
1999....................       4         29,148          10.7             695,821              23.87
2000....................       2         18,201           6.7             302,853              16.64
2001....................       4        124,271          45.8           1,805,281              14.53
2002....................       1         18,517           6.8             456,220              24.64
2003....................       0            --            --                  --                 --
2004....................       2         21,418           7.9             485,244              22.66
2005....................       0            --            --                  --                 --
                             ---        -------         -----          ----------
    Totals..............      28        271,185         100.0          $4,998,485             $18.43
                             ===        =======         =====          ==========
</TABLE>
- --------
(1) Excludes all space vacant as of December 31, 1995 unless a lease for a
    replacement tenant has been dated on or before June 30, 1996.
(2) Determined based upon aggregate base rent to be received over the term
    divided by the term in months multiplied by 12, including all leases dated
    on or before June 30, 1996. Certain leases became effective subsequent to
    June 30, 1996.
 
  The Company's tax basis in the Property for federal income tax purposes as
of December 31, 1995 was approximately $2.0 million (net of accumulated
depreciation and reductions in depreciable basis), and was fully depreciated
for federal tax purposes. For the 12-month period ending June 30, 1996, the
Company was assessed property taxes on this Property at an effective annual
rate of approximately 1.0%. Property taxes on this Property for the 12-month
period ending June 30, 1996 totaled $237,400. Management does not believe that
any capital improvements made during the 12-month period immediately following
the Offering should result in an increase in annual property taxes.
 
  Because the 1995 gross revenues for the Office Property located at 2260 E.
Imperial Highway were in excess of 10% of the aggregate gross revenues for all
of the Properties, additional information regarding this Property is presented
below.
 
  The property located at 2260 E. Imperial Highway had an occupancy rate of
100.0% for the years ended December 31, 1991 through 1995. As of June 30,
1996, Hughes Space & Communications occupied 100.0% of the Property's net
rentable square feet. Hughes Space & Communications commenced occupancy of
291,187 square feet on August 1, 1984. This lease runs through July 31, 2004
with CPI adjusted increases in base rent every two years. The next CPI
adjustment is scheduled to occur on August 1, 1998 and provides for an
increase in base rent to the extent that such CPI adjustment exceeds a minimum
floor of 1.86% compounded annually. The remaining CPI adjustments scheduled
for August 1, 2000 and August 1, 2002, respectively, provide for similar
increases to the extent that the CPI adjustment exceeds a minimum floor of 3%
compounded annually. The total annual rental income per net rentable square
foot was $25.35, $26.16, $26.66, $24.59 and $24.59 for the years ended
December 31, 1991 through December 31, 1995, respectively. The following table
sets forth for such Property for each of the ten years following the date of
Offering (i) the number of tenants whose leases will expire, (ii) the total
net rentable square feet covered by such leases, (iii) the percentage of total
leased net rentable square feet represented by such leases, (iv) the annual
base rent represented by such leases and (v) the average annual rent per net
rentable square foot represented by such leases.
 
                                      64
<PAGE>
 
<TABLE>
<CAPTION>
                                                    PERCENTAGE OF
                                                    TOTAL LEASED                          AVERAGE ANNUAL
                                                    NET RENTABLE                             RENT PER
                                     NET RENTABLE    SQUARE FEET                           NET RENTABLE
                          NUMBER OF SQUARE FOOTAGE   REPRESENTED       ANNUAL BASE         SQUARE FOOT
                           LEASES     SUBJECT TO     BY EXPIRING       RENT UNDER         REPRESENTED BY
YEAR OF LEASE EXPIRATION  EXPIRING  EXPIRING LEASES   LEASES(%)   EXPIRING LEASES($)(1) EXPIRING LEASES($)
- ------------------------  --------- --------------- ------------- --------------------- ------------------
<S>                       <C>       <C>             <C>           <C>                   <C>
1996....................       0            --            --                  --                 --
1997....................       0            --            --                  --                 --
1998....................       0            --            --                  --                 --
1999....................       0            --            --                  --                 --
2000....................       0            --            --                  --                 --
2001....................       0            --            --                  --                 --
2002....................       0            --            --                  --                 --
2003....................       0            --            --                  --                 --
2004....................       1(2)     286,151         100.0          $7,160,207             $25.02
2005....................       0            --            --                  --                 --
                             ---        -------         -----          ----------
    Totals..............       1        286,151(3)      100.0          $7,160,207             $25.02
                             ===        =======         =====          ==========
</TABLE>
- --------
(1) Determined based upon aggregate base rent to be received over the term
    divided by the term in months multiplied by 12, including all leases dated
    on or before June 30, 1996.
(2) The terms of this lease are described in the text preceding this table.
(3) The square footage reflected in the lease differs from the actual square
    footage for this Property of 291,187 as shown on the table under the
    caption "The Office and Industrial Properties." Subsequent to the
    execution of the lease, the Property was remeasured at a larger aggregate
    number of square feet than is reflected in the executed lease.
 
  The Company's tax basis in the Property for federal income tax purposes as
of December 31, 1995 was approximately $2.0 million (net of accumulated
depreciation and reductions in depreciable basis), and was fully depreciated
for federal tax purposes. For the 12-month period ending June 30, 1996, the
Company was assessed property taxes on this Property at an effective annual
rate of approximately 1.0%. Property taxes on this Property for the 12-month
period ending June 30, 1996 totaled $273,849. Management does not believe that
any capital improvements made during the 12-month period immediately following
the Offering should result in an increase in annual property taxes.
 
  Kilroy Long Beach. The Company developed, owns, leases and manages the three
Office Properties which comprise Phase II of Kilroy Airport Center Long Beach
("Kilroy Long Beach Phase II"), part of a planned four-phase, 53-acre Class A
corporate office headquarters, business park and retail and entertainment
center strategically located adjacent to the San Diego freeway (Interstate
405, the major coastal north-south highway in Southern California between Los
Angeles and Orange Counties) (the "I-405 Freeway") and immediately adjacent to
the Long Beach Airport. The Company has sole development rights for the
remaining 24 developable acres. Upon consummation of the Offering, the Company
also will own the two office buildings comprising Kilroy Long Beach Phase I
("Kilroy Long Beach Phase I") which were developed by the Company and which
have been leased and managed by the Company since their inception. See "--
Acquisition Properties--Kilroy Long Beach Phase I." Kilroy Long Beach Phase II
includes an eight-story and a six-story office building, and a multi-level
parking structure with retail facilities on the ground floor, encompassing an
aggregate of approximately 400,000 net rentable square feet, of which 91.0%
was leased as of June 30, 1996. The facility is the only GTE SmartPark in Los
Angeles County and offers tenants an array of advanced telecommunications
functions through a pre-laid fiber optic network, emergency backup loop and
ISDN interfaces. The facility also includes state-of-the-art mechanical and
electrical systems designed to accommodate the highest tenant demands
including above-standard floor-to-ceiling heights and floor loading and four
high-speed passenger elevators. Each of the office structures offers efficient
28,000 square foot floors. Other amenities include a spacious lobby with an
atrium, and a central courtyard with a fountain and pedestrian arcade. The
facility also features 24-hour on-site security and management, a fitness
center, group conference facilities, helipad facilities, and various retail
and business services including banking facilities, dining facilities and
printer services. The occupancy rates for
 
                                      65
<PAGE>
 
Kilroy Long Beach Phase II as of the years ended December 31, 1993 through
1995, and the six month period ended June 30, 1996, were 64.8%, 78.7%, 76.5%
and 91.0%, respectively. Major tenants include AIG Claim Services, Inc.,
Assistance in Marketing, Inc., CompuServe, Inc., Employer's Health Insurance,
Co., GTE Directories Sales Corporation, Great Northern Insured Annuities
Corp., Great Western Bank, HealthNet, Mutual of America Life Insurance
Company, North American Title Company, The Prudential Insurance Company of
America, R.L. Polk & Company, SCAN Health Plan, Senn-Delaney Leadership
Consulting Group, Inc., 20th Century Industries, UniCare Financial
Corporation, Unihealth and Zelda Fay Walls.
 
  Kilroy Airport Center Long Beach was developed in response to a desire by
the City of Long Beach to promote development in the airport area. Phase I of
the project, encompassing approximately 225,000 rentable square feet, was
developed by the Company in 1987 and was sold in 1993. The Company has entered
into a letter of intent to reacquire the Phase I properties. As of June 30,
1996 the Phase I properties were 96.6% leased to eight tenants with total
annual rental income per leased net rentable square foot of $15.67 (calculated
on the basis of base rent of signed leases at June 30, 1996, adjusted for
contractual increases in base rent in effect during the 12-month period ending
June 30, 1996). Major tenants include McDonnell Douglas Corporation, Olympus
America, Inc. and Devry, Inc. See "--Acquisition Properties--Kilroy Long Beach
Phase I." The Company has overseen and continues to oversee all leasing and
management of Phase I.
 
  Kilroy Long Beach Phase II was developed by the Company in 1989/1990 and
encompasses an aggregate of approximately 400,000 net rentable square feet.
Phases III and IV are planned for future development. See "--Development,
Leasing and Management Activities--Kilroy Airport Center Long Beach."
 
  Kilroy Airport Center Long Beach is subject to three long-term ground leases
under which the Company is ground lessee (assuming the assignment to the
Company of the approximately 14-acre parcel in connection with the acquisition
of Kilroy Long Beach Phase I). The City of Long Beach is the ground lessor
with respect to Kilroy Long Beach Phases I through III and the Board of Water
Commissioners of the City of Long Beach, acting on behalf of the City of Long
Beach, is the ground lessor with respect to Kilroy Long Beach Phase IV. The
basic term under each of the ground leases expires on July 17, 2035, with four
10-year renewals and a final renewal term of 9 years. Primary rent under the
leases for Kilroy Long Beach Phases I, II, III and IV is currently
approximately $338,000 per year, $295,000 per year, $75,000 per year and
$76,764 per year, respectively, with such amounts adjusted periodically to
take account of changes in the fair market rental value of the land underlying
each lease.
 
  Because the book value of the Office Property located at 3780 Kilroy Airport
Way will be in excess of 10% of the Company's total assets, additional
information regarding this Property is presented below.
 
  The property located at 3780 Kilroy Airport Way had an occupancy rate of
70.2%, 70.5%, 69.1%, 78.6% and 63.6% as of the years ended December 31, 1991
through 1995, respectively. As of June 30, 1996, SCAN Health Plan, a group
health insurer, and Zelda Fay Walls, an operator of executive office suites,
occupied approximately 20.4% and 12.7%, respectively, of the Property's net
rentable square feet. The Property's other tenants include companies engaged
in the insurance, healthcare, finance, high technology, law and accounting
industries. Base rent under the SCAN Health Plan lease is $941,325 per year.
The lease expires on August 31, 2000, subject to two successive five-year
options to renew. Base rent under Zelda Fay Walls lease is currently $823,896
per year although the tenant has been paying only approximately $640,200 since
August 1993 and the balance is expensed quarterly by the Company as an
increase to its bad debt reserve. The lease expires on September 30, 2002,
subject to a five-year option to renew. The average effective annual rent per
net rentable square foot for the years ended December 31, 1991 through 1995
was $13.02, $17.53, $18.90, $19.70 and $17.42, respectively. The following
table sets forth for such Property for each of the ten years following the
date of Offering (i) the number of tenants whose leases will expire, (ii) the
total net rentable square feet covered by such leases, (iii) the percentage of
total leased net rentable square feet represented by such leases, (iv) the
annual base rent represented by such leases and (v) the average annual rent
per net rentable square foot represented by such leases.
 
                                      66
<PAGE>
 
<TABLE>
<CAPTION>
                                                    PERCENTAGE OF
                                                    TOTAL LEASED                          AVERAGE ANNUAL
                                                    NET RENTABLE                             RENT PER
                                     NET RENTABLE    SQUARE FEET                           NET RENTABLE
                          NUMBER OF SQUARE FOOTAGE   REPRESENTED       ANNUAL BASE         SQUARE FOOT
                           LEASES     SUBJECT TO     BY EXPIRING       RENT UNDER         REPRESENTED BY
YEAR OF LEASE EXPIRATION  EXPIRING  EXPIRING LEASES LEASES(%)(1)  EXPIRING LEASES($)(2) EXPIRING LEASES($)
- ------------------------  --------- --------------- ------------- --------------------- ------------------
<S>                       <C>       <C>             <C>           <C>                   <C>
1996....................       4         18,867          8.79          $  363,225             $19.25
1997....................       4         22,469         10.46             532,872              23.72
1998....................       1          2,088          0.97              47,606              22.80
1999....................       2          4,339          2.02              89,709              20,68
2000....................       7         74,093         34.50           1,816,896              24.52
2001....................       5         28,251         13.15             638,222              22.59
2002....................       0              0          0.00                   0               0.00
2003....................       1          9,439          4.40             209,299              22.17
2004....................       1          3,922          1.83              85,656              21.84
2005 and beyond.........       2         51,290         23.88           1,077,090              21.00
                             ---        -------        ------          ----------
    Totals..............      27        214,758        100.00          $4,860,575             $22.63
                             ===        =======        ======          ==========
</TABLE>
- --------
(1) Excludes all space vacant as of December 31, 1995 unless a lease for a
    replacement tenant has been dated on or before June 30, 1996.
(2) Determined based upon aggregate base rent to be received over the term
    divided by the term in months multiplied by 12, including all leases dated
    on or before June 30, 1996. Certain leases became effective subsequent to
    June 30, 1996.
 
  The Company's tax basis in the Property for federal income tax purposes was
$11.4 million (net of accumulated depreciation) as of December 31, 1995. The
Property is depreciated using the modified accelerated cost recovery system
straight-line method, based on an estimated useful life ranging from 31 1/2
years to 39 years, depending upon the date of certain capitalized improvements
to the Property. For the year ended December 31, 1995, the estimated average
depreciation rate for this Property under the modified accelerated cost
recovery system was 3.4%. For the 12-month period ending June 30, 1996, the
Company was assessed property taxes on this Property at an effective annual
rate of approximately 1.2%. Property taxes on this Property for the 12-month
period year ending June 30, 1996 totaled $170,256. Management does not believe
that any capital improvements made during the 12-month period immediately
following the Offering should result in an increase in annual property taxes.
 
INDUSTRIAL PROPERTIES
 
  Like the Office Properties, the Industrial Properties were designed and
developed to provide above-standard quality and meet the long-term needs of
tenants. The Company was among the first Southern California developers to
air-condition its Industrial Properties, increasing each facility's
multidimensional use while providing environments for increased tenant
operating efficiency and comfort. The Industrial Properties, all but one of
which are located in Southern California, are primarily comprised of single-
story, tilt-up concrete buildings ranging in size from approximately 57,000 to
192,000 square feet. The Industrial Properties feature high-tech assembly
areas and supporting office space for management and administrative functions.
While most of the buildings are occupied by a single tenant, they were
designed for multi-tenant operations and can be reconfigured for such use.
 
  The Industrial Property leases are written on a triple net basis with
initial terms of five to eleven years and options to renew for up to an
additional five years at the then current fair market value. The leases
generally provide for rent increases based on the applicable regional CPI or
contain specific contractual increases. The leases do not contain purchase
options.
 
  Certain of the Industrial Properties can support additional development and
the Company presently is planning to develop in the next two years, subject to
substantial pre-leasing, approximately 105,000 square feet of additional
leasable area. The Company anticipates that any such development would be
funded with amounts
 
                                      67
<PAGE>
 
available under the Credit Facility. There can be no assurance, however, that
the Company will be able to successfully develop any of the Industrial
Properties, or obtain financing for any such development on terms favorable to
the Company. See "Risk Factors--Real Estate Financing Risks" and "--No
Limitation on Debt."
 
DEVELOPMENT, LEASING AND MANAGEMENT ACTIVITIES
 
  Since 1947, the Company and its affiliates have developed millions of square
feet of office and industrial space, including high technology facilities,
primarily located in Southern California, for its own portfolio and for third
parties. Development activities include site selection, land entitlement,
project design and construction, build-to-suit activities and tenant
renovations. The Company has successfully developed numerous sophisticated
development projects for some of the nation's most prominent corporations both
in Southern California and around the country. The Company's extensive
experience has enabled it to form key alliances with major corporate tenants,
municipalities and landowners in Southern California with respect to the
Development Properties described below. As a result of these relationships,
the Company has various rights to a significant source of developable land in
key locations where a substantial portion of the costs of carry are, in most
cases, the obligation of the respective landowner. The Company's relationships
with tenants and users has enabled it to receive fees in connection with its
role as developer of these projects, or, in the case of Kilroy Long Beach and
the Thousand Oaks Civic Arts Plaza Retail and Entertainment Center, to develop
the land for its own account where such development will result in a favorable
risk adjusted return on investment. In connection with the Formation
Transactions, the Company will succeed to the Kilroy Group's rights in and to
the Development Properties.
 
  The Company or the Operating Partnership will be the manager of the
Properties and may provide building management services for independent
building owners for terms that vary in length but which generally provide for
management fees of 4% to 5% of collected revenue and may also provide for
reimbursement of expenses.
 
  The following is a description of the Development Properties as presently
contemplated.
 
  Kilroy Airport Center Long Beach. In conjunction with the Company's role as
master ground lessee of Kilroy Long Beach, the Company manages all ongoing
leasing and development activities for the four-phase, approximately 53-acre
office and retail development project, including sole development rights to
the approximately 24 remaining developable acres. To date the Company has
developed Phases I and II. See "--Office Properties--Kilroy Airport Center
Long Beach" and "Acquisition Properties." Current development activities are
focused on Phase III of the project ("Kilroy Long Beach Phase III") which will
be developed and owned by the Company. Kilroy Long Beach Phase III presently
is contemplated to initially include a seven-story office building with
approximately 186,000 rentable square feet and a five-story office building
with approximately 132,000 rentable square feet. In addition, Kilroy Long
Beach Phase III may be developed, subject to site plan approval by the City of
Long Beach, to include an additional office building with up to 150,000
rentable square feet of space. Kilroy Long Beach Phase III presently is being
marketed to build-to-suit tenants.
 
  Kilroy Long Beach also is planned to include Phase IV ("Kilroy Long Beach
Phase IV"), which will be developed and owned by the Company. Kilroy Long
Beach Phase IV presently is contemplated to include an aggregate of up to
550,000 rentable square feet of office and retail space including high quality
retail and specialty shops, sit-down and convenience restaurants and, subject
to site-plan approval by the City of Long Beach, a multitheater and virtual
reality entertainment center.
 
  To date the Company has invested approximately $8.8 million in
infrastructure improvements which are in place for Kilroy Long Beach Phases
III and IV and has available an additional approximately $2.6 million of
revenue bond proceeds held by the City of Long Beach which the Company
believes is sufficient to provide for further traffic mitigation improvements,
if any, which may be required by the City in connection with the future
development. Because of the over 900,000 aggregate rentable square feet
entitled at Kilroy Long Beach Phases III and IV, and the significant
infrastructure improvements already in place, the Company believes that Kilroy
Long Beach offers substantial opportunity for tenant expansion from a location
servicing both Los Angeles and Orange Counties. See "--Office Properties--
Kilroy Long Beach."
 
                                      68
<PAGE>
 
  Kilroy Long Beach Phase III and Phase IV will be developed by the Company or
the Services Company for the benefit of the Company. Prior to the Formation
Transactions, the Kilroy Group and its affiliates acquired construction
materials at a cost of approximately $6.5 million in connection with the
development of Kilroy Long Beach Phase III. These construction materials will
not be contributed to the Company and the Company will have no obligation to
purchase the materials from the Kilroy Group or to in any way use the
materials in the development and completion of the project. Any decision on
the part of the Company to purchase the materials from the Kilroy Group in the
future will be determined by a majority of the Independent Directors.
 
  Kilroy Airport Center Long Beach is subject to three long-term ground leases
under which the Company is ground lessee. The City of Long Beach is the ground
lessor with respect to Kilroy Long Beach Phase III and the Board of Water
Commissioners of the City of Long Beach, acting on behalf of the City of Long
Beach, is the ground lessor with respect to Kilroy Long Beach Phase IV. The
basic term under each of the ground leases expires on July 17, 2035, with four
10-year renewals and a final renewal term of 9 years. Primary rent under the
leases for Kilroy Long Beach Phases III and IV is currently approximately
$75,000 per year and $76,764 per year, respectively, with such amounts
adjusted periodically to take account of changes in the fair market rental
value of the land underlying each lease.
 
  Thousand Oaks Civic Arts Plaza Retail and Entertainment Center. The Kilroy
Group has entered into an exclusive agreement with the City of Thousand Oaks
Redevelopment Agency to negotiate a Development and Disposition Agreement with
respect to a private-public partnership to develop the Thousand Oaks Civic
Arts Plaza Retail and Entertainment Center, an approximately 11-acre
commercial property (representing approximately six developable acres net of
acreage reserved for open areas) directly adjacent to the City's recently
completed Civic Arts Plaza complex. The Thousand Oaks Civic Arts complex was
constructed by the City at a cost of approximately $65 million and includes an
1,800-seat main auditorium designed for theater and concert performances. The
complex also includes a second 400-seat theater. The Company's proposed
project is planned to contain a mixed-use entertainment and retail center and
is expected to be under construction in 1997. Upon consummation of the
Formation Transactions, the Kilroy Group will assign to the Services Company
the exclusive negotiation agreement to enter into a Development and
Disposition Agreement and related documents and agreements pursuant to which
the Company would acquire, develop and lease the Thousand Oaks Civic Arts
Plaza Retail and Entertainment Center. The Thousand Oaks Civic Arts Plaza
Retail and Entertainment Center is expected to have easy freeway access to and
from U.S. Highway 101, the major highway running through the City of Thousand
Oaks, and the only major coastal highway between the City of Los Angeles and
northern communities including Oxnard, Ventura, Santa Barbara and the San
Francisco Bay Area ("U.S. Highway 101").
 
  The Civic Arts Plaza Retail and Entertainment Center is anticipated to be
anchored by a state-of-the art movie theater and virtual reality venue and
will include high quality retail and specialty shops. The project is presently
planned to include a total of approximately 170,000 gross square feet of
building area in three primary, single-story structures, supported by an
above-grade parking structure with approximately 1,000 vehicle spaces.
Approximately 90,000 square feet of the project is expected to be developed as
the entertainment component and would include approximately 60,000 square feet
within a 2-story, 12- to 14-auditorium movie theater, containing approximately
3,100 seats and approximately 30,000 square feet as the virtual reality venue.
See""--Agreement with United Artists Theater Circuit, Inc." The remaining
building area of the project (totaling approximately 80,000 square feet) is
expected to be incorporated within several single-story structures. These
buildings will include a total of approximately 54,000 square feet which will
be occupied by retail and specialty shops, while the remaining approximately
26,000 square feet will be occupied by both formal and casual sit down
restaurants and convenience food restaurants.
 
  Riverside Judicial Center. In a unique "public-private partnership" with the
City of Riverside Redevelopment Agency and the County of Riverside, the
Company has entered into a Development Management Agreement to develop and
manage for a fee a comprehensive master planning, design, entitlement and
development effort for a multi-jurisdictional judicial center complex (the
"Riverside Judicial Center") in downtown Riverside that is expected to serve
the entire greater Riverside and San Bernardino area. Riverside is located
approximately 56 miles east of Los Angeles. The project is expected to include
a United States
 
                                      69
<PAGE>
 
Bankruptcy Court and administrative complexes. In addition, the site may also
include a United States District Court. Construction of the Riverside Judicial
Center began in February 1996. Upon consummation of the Formation
Transactions, the Services Company will be assigned the Development Management
Agreement in connection with the project.
 
  Northrop Grumman. The Company has been retained on a fee basis by Northrop
Grumman Corporation ("Northrop Grumman") to undertake a comprehensive, multi-
phased effort to analyze, entitle and manage the future reuse, planning,
entitlement, marketing and disposition of the approximately 200-acre property
located in the City of Pico Rivera, located approximately 13 miles east of Los
Angeles, which currently serves as Northrop Grumman's headquarters for
activities related to the U.S Air Force's B-2 "Stealth" Bomber Program. Early
stages of the project are underway, including the execution of a Memorandum of
Understanding with the City of Pico Rivera and a community outreach program
and submission of a conceptual reuse plan to the City of Pico Rivera. Under
the terms of the agreement, the Company, including its predecessor, will
receive up to $653,930 in fees and reimbursable expenses for the services
performed. The agreement runs through February 15, 1997, unless earlier
terminated by the parties. The Company has also been engaged on a commission
basis with a cooperating broker as exclusive broker through December 31, 1996,
to sell on behalf of Northrop Grumman approximately 40 acres of land at the
site. Upon consummation of the Offering, the rights to perform all such
services will be assigned to the Services Company.
 
  Agreement with United Artists Theater Circuit, Inc. The Company has recently
entered into a lease with United Artists Theater Circuit, Inc. in connection
with the development of a multiplex theater complex and virtual reality
entertainment center at the Thousand Oaks Civic Arts Plaza Retail and
Entertainment Center. In addition, the Company presently is negotiating with
United Artists Theater Circuit, Inc. to lease sites to develop similar
entertainment centers at Kilroy Long Beach (which would be included as part of
Kilroy Long Beach Phase IV). See "--Development, Leasing and Management
Activities--Kilroy Long Beach" and "--Thousand Oaks Civic Arts Plaza Retail
and Entertainment Center." The proposed entertainment element would provide a
major, regional-scale, state-of-the-art attraction for local residents in the
respective communities and provide an additional amenity to users of office
buildings at Kilroy Long Beach.
 
ACQUISITION PROPERTIES
 
  The Company has entered into agreements to acquire three office properties
(the "Acquisition Properties"). In the event one or more of the Acquisition
Properties are purchased, the Company expects to finance the acquisition cost
(approximately $36.3 million in the aggregate) with long-term borrowings, new
mortgage financing and/or the proceeds of the Offering. Acquisition of each of
these properties is subject to negotiation of satisfactory documentation and
completion by the Company of its due diligence procedures. Accordingly, there
is no assurance that any of the Acquisition Properties will be acquired.
Unless otherwise indicated, all calculations and information contained in this
Prospectus give pro forma effect to the acquisition of the Acquisition
Properties.
 
  Kilroy Long Beach Phase I. Two of the Acquisition Properties comprise Kilroy
Long Beach Phase I, a Class A office complex which includes a two-story office
building and a combination two/three-story office building encompassing an
aggregate of 225,000 rentable square feet. Kilroy Long Beach Phase I was
developed by the Company in 1987 and sold by the Company to the current owner
in 1993. The Company has overseen all leasing and management activity at the
property since its development. As of December 31, 1995, the properties were
96.6% leased to eight tenants at an average annual base rent per net rentable
square foot of $15.90. See "--Office Properties--Kilroy Long Beach."
 
  Thousand Oaks Office Property. The third Acquisition Property is a stand-
alone three-story Class A office property located in Thousand Oaks,
California, which encompasses approximately 81,100 rentable square feet and,
as of December 31, 1995, was 100.0% leased to eleven tenants at an average
annual base rent per net rentable square foot of $23.26.
 
                                      70
<PAGE>
 
  Other Industrial Properties. The Company also has entered into agreements to
acquire three industrial properties comprising an aggregate of approximately
800,000 net rentable square feet, located in El Segundo, Anaheim and Costa
Mesa, California. Each of the proposed acquisitions remains subject to
satisfactory documentation and completion of the Company's due diligence
procedures. Accordingly, there can be no assurance that any of such properties
will be acquired. In addition, because the Company is in the preliminary
stages of its due diligence review with respect to each of these properties,
the financial calculations and information contained in this Prospectus do not
give pro forma effect to such acquisitions.
 
THE COMPANY'S SOUTHERN CALIFORNIA SUBMARKETS*
 
  The Company believes that Los Angeles, Orange and Ventura Counties have been
and will continue to be excellent markets in which to own and operate Class A
office, industrial and retail property over the long term. The Company
believes that these counties are attractive for a number of reasons:
 
 
  .    These counties, together with Riverside and San Bernardino Counties,
       comprise the second largest Consolidated Metropolitan Statistical Area
       in the United States (the "Southern California Area") and rank as the
       world's 12th largest economy;
 
  .    The continuing expansion of the service-producing sector of the
       economy;
 
  .    Employment sectors using Class A office and industrial properties
       continue to expand with the Southern California Area's continuing
       growth in foreign trade and diversification of industries;
 
  .    Since 1992 there has been virtually no increase in the Southern
       California Area's inventory of office space; and
 
  .    The Southern California Area's demand for quality industrial space has
       spurred new construction of industrial properties.
 
  As of December 31, 1995, the Southern California Area had a total population
of approximately 15.6 million people which accounted for approximately 5.9% of
the total U.S. population. Annual population growth in the Southern California
Area since 1990 has averaged approximately 217,000 persons. Of the
approximately 15.6 million people in the Southern California Area,
approximately 9.2 million persons lived in Los Angeles County and
approximately 2.6 million persons lived in Orange County. Annual estimated
growth in population in these counties over the next five years is expected to
be approximately 94,000 and 32,000 persons, respectively. The following table
presents the total population as a proportion of the United States population
for the Southern California Area and California for 1980, 1990 and 1995 and
the estimated population for 2000 and 2010.
- --------
*  The Company retained Robert Charles Lesser & Co. ("Lesser"), nationally
   recognized experts in real estate consulting and urban economics, to study
   the Company's Southern California submarkets, and the discussion of such
   submarkets below and under the caption "Summary--The Company's Southern
   California Submarkets" is based upon Lesser's findings. While the Company
   believes that these estimates of economic trends are reasonable, there can
   be no assurance that these trends will in fact continue.
 
                                      71
<PAGE>
 
             TOTAL POPULATION AS A PROPORTION OF THE UNITED STATES
                    SOUTHERN CALIFORNIA AREA AND CALIFORNIA
                                   1980-2010

                             [GRAPH APPEARS HERE]

<TABLE>
<CAPTION>
                             1980     1990     1995     2000     2010
<S>                        <C>      <C>      <C>      <C>      <C>
California                 10.50%   12.00%   12.30%   12.70%   13.50%
Southern California Area    3.65%    5.80%    5.90%    6.10%    6.30%
</TABLE>
 
                                       72
<PAGE>
 
  Increasing Employment. The Southern California Area economy experienced
significant recessionary conditions during the 1990-1993 period. While the
Southern California Area lagged behind the rest of the country in entering the
recession, it also lagged in the economic recovery, in part due to the
cutbacks in the aerospace and defense industries. Employment growth recovered
in 1995. The passage of the North American Free Trade Agreement (NAFTA) in the
first quarter of 1995 and the General Agreement on Tariffs and Trade (GATT) in
the fourth quarter of 1994 provide optimism for new jobs and economic growth
for California. In 1995, the Southern California Area experienced a net
increase in employment with the addition of approximately 113,000 jobs,
representing an approximately 1.9% increase over the prior year. Of the total,
approximately 61,000 jobs (approximately 53.9% of the total) were created in
Los Angeles County. Employment in the Southern California Area is expected to
increase during 1996 through 1998, with an expected average increase of
approximately 125,000 to 135,000 jobs annually, representing an annual growth
rate of approximately 2.1% to 2.2%, nearly twice the expected national growth
rate of 1.2%. The following table shows the annual non-agricultural change in
jobs for the Southern California Area for the period from 1980 through 1995,
and the expected change in jobs for the period from 1996 through 1998.
 
                   ANNUAL NON-AGRICULTURAL EMPLOYMENT CHANGE
                           SOUTHERN CALIFORNIA AREA
                                   1980-1998

                             [GRAPH APPEARS HERE]

<TABLE>
<CAPTION>
ANNUAL CHANGE IN JOBS
Southern California Area
<S>           <C>
1980               -0-
1981            67,900
1982          (127,300)
1983            42,100
1984           222,700
1985           190,800
1986           188,500
1987           194,700
1988           189,300
1989           155,700
1990            90,600
1991          (173,000)
1992          (189,000)
1993          (102,500)
1994            29,200
1995           112,800
1996           124,448
1997           127,062
1998           135,907
</TABLE>
  Unemployment rate in the Southern California Area is moving downward from
its 1993 peak. For the U.S., the 1995 unemployment rate was approximately 6.2%
versus approximately 7.7% in California. By comparison, the 1993 unemployment
rates for the U.S. and California were approximately 6.9% and 9.2%,
respectively. While the unemployment rate in the Southern California Area has
been declining in the last couple of years, it probably will remain higher
than the unemployment rate for the nation as a whole. Within the Southern
California Area, the 1995 unemployment rates vary from a low of approximately
5.4% in Orange County to a high of approximately 8.7% in Riverside and San
Bernardino Counties. Los Angeles County's unemployment rate stood at
approximately 7.7%--the same as California's.
 
  Diversification of Industries. Los Angeles and Orange Counties are widely
regarded as major centers for corporate and international business and the
growth of international trade through the Los Angeles-Long Beach port complex,
which presently ranks as the largest commercial port in the United States, is
driving the growth of business in the surrounding area. While the southern
coastal Los Angeles County market, including the EL Segundo and Long Beach
submarkets, has historically been, and continues to be, associated with the
 
                                      73
<PAGE>
 
aerospace and defense industries, the downsizing of those industries has
resulted in the region becoming more diversified, with major corporations in
emerging industries such as telecommunications and healthcare. The Company
believes this diversity, which is reflected in the Company's tenant base, has
strengthened these submarkets in which the Properties are located.
 
  Foreign Trade. The growth in the region's employment is attributable in part
to the increase in the volume of trade in the region's ports and airports,
which at the end of 1995 accounted for over 13.0% of the total trading volume
in the United States and which has grown at an average annual rate of
approximately 11.4% during the ten-year period ended in 1994 compared to an
approximately 8.0% growth rate nationally during the same period. In addition,
during 1995 the trading volume among the region's ports and airports increased
another approximately 16.0%, further securing the region's position as the
nation's leader in international trade activity. The following table shows the
growth in the Los Angeles Customs District's share of U.S. Trade for the
period from 1972 through 1994.
 
               LOS ANGELES CUSTOMS DISTRICT SHARE OF U.S. TRADE
                                   1972-1994

                             [GRAPH APPEARS HERE]

1972          6%
1973          6%
1974          7%
1975          6%
1976          7%
1977          7%
1978          7%
1979          7%
1980          8%
1981          8%
1982          8%
1983          9%
1984          9%
1985         11%
1986         12%
1987         12%
1988         12%
1989         12%
1990         12%
1991         12%
1992         12%
1993         12%
1994         13%
1995         12%
 
                                      74
<PAGE>
 
  Growing Service Economy. Over the last 15 years the composition of
employment in the Southern California Area has shifted, generally mirroring
national patterns. The goods-producing sector (mining, construction and
manufacturing) has declined from an approximately 28.7% share in 1980 to
approximately 20.1% in 1995. Within this sector, manufacturing accounted for
the entire decline. Correspondingly, the services-producing sector
(transportation, communications and utilities; wholesale and retail trade;
finance, insurance and real estate services; and government) has expanded from
approximately 71.3% of total employment in 1980 to approximately 79.9% in
1995. The following table presents the total employment growth from 1980 to
1995 for various employment sectors in the Southern California Area.
 
             TOTAL NON-AGRICULTURAL EMPLOYMENT GROWTH BY INDUSTRY
                           SOUTHERN CALIFORNIA AREA
                                   1980-1995
 
                             [GRAPH APPEARS HERE]

Mining                                    -10.2
Construction                               16.9
Manufacturing                              -260
Transportation and Public Utilities        38.2
Wholesale and Retail Trade                238.5
F.I.R.E.                                   32.9
Services                                  697.6
Government                                138.5
Goods Producing Employment               -253.3
Service Producing Employment             1145.7
 
                                      75
<PAGE>
 
  In particular, the entertainment industry now accounts for over 200,000 jobs
in the region. The following table shows the growth of tourism and
entertainment-related jobs for the period from 1972 through 1995.
 
               GROWTH OF TOURISM AND ENTERTAINMENT-RELATED JOBS
                           SOUTHERN CALIFORNIA AREA
                                   1972-1995
 
                             [GRAPH APPEARS HERE]

<TABLE>
<CAPTION>
YEAR       Thousands of Jobs     % Change
<S>        <C>                   <C>
1972             110                ---
1973             120                9.1%
1974             120                0.0%
1975             123                2.5%
1976             130                5.7%
1977             140                7.7%
1978             145                3.6%
1979             150                3.4%
1980             148               -1.3%
1981             165               11.5%
1982             167                1.2%
1983             175                4.8%
1984             180                2.9%
1985             190                5.6%
1986             200                5.3%
1987             218                9.0%
1988             225                3.2%
1989             242                7.6%
1990             254                5.0%
1991             262                3.1%
1992             245               -6.5%
1993             251                2.4%
1994             263                4.8%
1995             297               12.9%
</TABLE> 
 
  In addition, recent developments in the Southern California Area aerospace
industry, such as additional orders for the McDonnell Douglas C-17 military
cargo jets and the announcements of new orders for McDonnell Douglas airliners
by commercial carriers and the hiring of up to 700 employees by TRW
Corporation, should help to stabilize related employment. The following table
shows the number of jobs in the aerospace/high technology industries in the
Southern California Area for the period from 1988 through 1995.
 
                  AEROSPACE/HIGH TECHNOLOGY EMPLOYMENT TRENDS
                           SOUTHERN CALIFORNIA AREA
                                   1988-1997
 
                             [GRAPH APPEARS HERE]

<TABLE> 
<CAPTION>
                              1988   1989   1990   1991  1992  1993   1994 1995
<S>                          <C>    <C>    <C>    <C>    <C>  <C>    <C>   <C>
Aerospace/High Technology    274.2  265.6  253.3  228.6  199  168.7  146.7  135
</TABLE>
 
                                      76
<PAGE>
 
  Office Submarkets. Total office space in the Southern California Area
amounts to approximately 222.7 million square feet. The Southern California
Area is the second largest office market in the country after the New York
City Metro Area (with over approximately 800 million square feet). Los Angeles
County comprises two-thirds of the metro office inventory, roughly 149.8
million square feet; Orange County accounts for approximately 54 million
square feet.
 
  Vacancy rates in the office space market in the Southern California Area are
trending downward from a high in 1991 and 1992 of approximately 19.7% to a
level at the end of 1995 of approximately 18.0%. At December 31, 1995, the
vacancy rate for the Office Properties was approximately 10.7%. The following
table shows the U.S. and Southern California Area office vacancy rates for the
period from 1988 through 1995.
 
                         OFFICE MARKET VACANCY TRENDS
                     SOUTHERN CALIFORNIA AREA VERSUS U.S.
                                   1988-1995
 
                             [GRAPH APPEARS HERE]
<TABLE>
<CAPTION>
                           1988   1989   1990   1991   1992   1993   1994   1995
<S>                       <C>    <C>    <C>    <C>    <C>    <C>    <C>    <C>
U.S.                      18.2%  18.6%  19.5%  19.4%  18.7%  17.0%  15.5%  14.1%
Southern California Area   0.0%  17.2%   0.0%  19.8%  19.7%  19.2%  18.3%  17.8%
</TABLE>
 
                                      77
<PAGE>
 
   Net absorption in the Southern California Area in 1995 amounted to
approximately 2.2 million square feet, down from approximately 2.7 million
square feet in the prior year but ahead of 1993's approximately 1.7 million
square feet. By comparison, absorption in the Southern California Area ranged
from approximately 11.1 million to 11.7 million square feet during the mid- to
late 1980s. Annual increases in employment during the 1980s fluctuated between
approximately 160,000 and 200,000 jobs per year, as opposed to job losses
during 1991 to 1994. The following table shows the annual absorption of office
space in the Southern California Area for each of the years from 1986 through
1995.
 
                     ANNUAL NET ABSORPTION OF OFFICE SPACE
                           SOUTHERN CALIFORNIA AREA
                                   1986-1995
 
                             [GRAPH APPEARS HERE]

1986     11,116
1987     11,684
1988     11,687
1989     11,260
1990      7,635
1991      5,005
1992      3,301
1993      1,689
1994      2,657
1995      2,153
 
                                      78
<PAGE>
 
  No Additional Supply of Office Space. During the last four years only
approximately 521,000 square feet of office space has been added to the
Southern California Area. The following table shows the additions in square
footage to the Southern California office market for each of the last six
years.
 
          ADDITIONS TO THE SOUTHERN CALIFORNIA AREA'S OFFICE MARKET*

                             [GRAPH APPEARS HERE]
 
<TABLE>
<CAPTION>
Year     Square Feet
<S>      <C>
1989       21,097
1990       11,033
1991        9,384
1992        3,188
1993          720
1994          -
1995          -
</TABLE>
- --------
*  In 1994 and 1995, the total square footage in the market decreased by
   approximately 2.0 million square feet and approximately 1.3 million square
   feet, respectively.
 
  The addition in the near-term of any new speculative office space to the
market remains unlikely as effective rents for multi-tenant properties are
currently well below the level needed to make new construction economically
feasible.
 
  El Segundo Office Submarket. In the El Segundo submarket the Company owns
and operates three Office Properties at Kilroy LAX, and one stand alone two-
story office building. The aggregate rentable square feet of the Office
Properties in the El Segundo submarket represent approximately 21% of the
approximately 3.4 million rentable square feet of all Class A office
properties located in this submarket as of December 31, 1995.
 
  The El Segundo submarket is an approximately 5.4 square mile area in the
southwestern coastal section of Los Angeles County. The El Segundo submarket
has the advantages of proximity to LAX without the disadvantages of being
located within the City of Los Angeles, as is the case with the submarket
located on the northeast side of LAX (the "LAX/Century Boulevard submarket").
The El Segundo submarket has a highly qualified computer and technology-based
work force. El Segundo's tax structure is as much as $6.00 per square foot per
annum lower than neighboring Los Angeles, principally attributable to lower
gross receipts and utility taxes. As a result, the El Segundo submarket has
historically enjoyed higher rental occupancy and tenant retention rates than
neighboring submarkets, such as LAX/Century Boulevard, Torrance and Carson.
 
  The El Segundo submarket tenant base has broadened from its historic
concentration of aerospace industry tenants. A number of major corporations
have a significant presence in the El Segundo submarket, including
 
                                      79
<PAGE>
 
Xerox Corporation, Mattel, Inc., Chevron USA, Inc., AT&T, TRW Corporation and
Hughes Space & Communications.
 
  Management believes that because of the high quality and strategic location
of the four Office Properties located in the El Segundo submarket, the El
Segundo Office Properties have had higher occupancy and tenant retention than
other properties within this submarket and have achieved higher rental rates.
As of December 31, 1995, the direct vacancy rate of Class A office buildings
in the El Segundo submarket was approximately 10.8% as compared to
approximately 7% for the Company's El Segundo Office Properties as a whole.
The average asking annual rental rate in the El Segundo submarket as of
December 31, 1995 was $21.00 per square foot for Class A office buildings
compared to an average asking annual rental rate of $23.50 per square foot for
the Company's Office Properties. For the year ended December 31, 1995, there
was net absorption of approximately 237,000 rentable square feet of Class A
office space. No new office buildings are under construction and, to the
Company's knowledge, no new construction is presently projected for the
remainder of 1996 in the El Segundo submarket. The following tables show the
comparative vacancy rates of Class A office space in the El Segundo submarket
and Kilroy LAX, and the comparative mean asking rents of Class A office space
in the El Segundo submarket and Kilroy LAX, respectively.
 
                       HISTORICAL CLASS A OFFICE VACANCY
                  KILROY PROPERTIES VERSUS EL SEGUNDO CLASS A
                                   1990-1995
 
                             [GRAPH APPEARS HERE]

<TABLE>
<CAPTION>
Year      Kilroy Properties     El Segundo Class A
<S>       <C>                   <C>
1990           8.0%                     8.3%
1991           6.9%                     4.4%
1992           6.8%                     8.5%
1993           5.5%                     5.5%
1994           4.3%                    19.5%
1995           4.3%                    10.8%
</TABLE>
 
                                      80
<PAGE>
 
                        HISTORICAL CLASS A OFFICE RENTS
                  KILROY PROPERTIES VERSUS EL SEGUNDO CLASS A
                                   1990-1995
 
                             [GRAPH APPEARS HERE]

<TABLE>
<CAPTION>
         Kilroy Properties      El Segundo Class A
         Mean Asking Rents       Mean Asking Rents
<S>      <C>                     <C>
1990          $23.30                  $22.30
1991          $23.85                  $22.65
1992          $23.91                  $22.55
1993          $23.70                  $21.30
1994          $23.40                  $21.80
1995          $23.40                  $21.10
</TABLE>
 
  Subsequent to December 31, 1995, Hughes Space & Communications vacated an
approximately 502,000 square foot Class A office space owned by an unaffiliated
third-party located at 200 North Sepulveda Boulevard in El Segundo. Through
June 30, 1996, approximately 87,000 square feet had been leased, leaving
approximately 415,000 available, and putting the vacancy rate for Class A
office space in the El Segundo submarket at approximately 23.0%. Local brokers
indicate that the office property located at 200 North Sepulveda Boulevard is
among the lower quality Class A office buildings in the El Segundo submarket.
According to Lesser, the asking rents for quality Class A office space in the
El Segundo submarket should be relatively unaffected by the addition of the
lower quality office property space to the submarket's available inventory.
 
  Notwithstanding the increase in overall available Class A office space in the
El Segundo submarket through June 30, 1996, the decrease in the El Segundo
submarket vacancy rate for quality Class A office space, and the indications of
improvement and diversification in the submarket's economy, should apply some
short-term upward pressure on rents for quality Class A office space, by as
much as 5.0% within the next year. Asking rents with respect to lower quality
Class A office space should remain relatively flat until the related vacancy
rate drops to 15%.
 
  Long Beach Airport Area Office Submarket. Upon consummation of the Offering
and the Formation Transactions, the Company will own five Office Properties at
Kilroy Long Beach Phases I and II which represent approximately 22% of the
total rentable square feet of all Class A office properties located in the Long
Beach Airport area submarket.
 
  The Long Beach Airport area submarket is strategically located near the
border of Los Angeles and Orange Counties, adjacent to the I-405 Freeway and is
in close proximity to several other freeways which serve the area. The
submarket is also near the Long Beach Airport which, through AmericaWest
Airlines, provides commercial airline access to all regions of the country. The
Long Beach Airport area submarket provides tenants with the ability to draw a
workforce from and to provide services to clients in both Los Angeles and
Orange Counties, making it an ideal location for companies operating in both
counties to consolidate their operations to a convenient single location. In
addition, portions of the submarket, including the Properties located at Kilroy
 
                                       81
<PAGE>
 
Airport Center Long Beach, are located within a favorable tax zone which
permits qualifying tenants to receive a variety of tax credits and deductions
not available in neighboring submarkets. The submarket also offers tenants a
secure environment within a first class office park with the potential for
substantial expansion, whereas the Long Beach central business district
submarket is hampered by traffic congestion and limited opportunities for
tenant expansion.
 
  As of December 31, 1995, the direct vacancy rate of Class A office buildings
in the Long Beach Airport area submarket was approximately 17.4% as compared
to approximately 16% for the Company's Long Beach Office Properties as a
whole. For the year ended December 31, 1995, there was net absorption of
approximately 458,000 rentable square feet of Class A office space. The
current mean asking annual rental rate in the Long Beach Airport area
submarket is approximately $24.40 per rentable square foot for Class A office
buildings compared to the current mean asking annual rental rate at Kilroy
Long Beach of $24.30 per rentable square foot.
 
  The decrease in the submarket's vacancy rate, the indications of improvement
in the submarket's aerospace industry and the present difficulty in locating
large blocks of contiguous space should apply some short-term upward pressure
on rents for Class A office space within the next two years. Available space
for technology companies is particularly difficult to find and buildings which
offer current telephone communication capabilities and electrical support are
more likely to benefit earlier.
 
  Thousand Oaks Submarket. Upon consummation of the Offering and the Formation
Transactions, the Company will own a stand-alone three-story office building
located in Thousand Oaks, California. The City of Thousand Oaks has
approximately 112,600 residents, and is located 40 miles northwest of Los
Angeles in Ventura County, which is located along the coast immediately north
of Los Angeles County. As of December 31, 1995, Ventura County had a
population of approximately 720,000 persons. The County is home to companies
in various industries including high technology, pharmaceuticals and finance.
As of December 31, 1995, the vacancy rate of office space in the Ventura
County office submarket was approximately 14.1%. During 1995, there was net
absorption in the Ventura County office submarket of approximately 157,000
rentable square feet of office space. The average annual effective gross rent
for office space in the Ventura County office submarket as of December 31,
1995 was $15.00 per square foot.
 
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<PAGE>
 
 Industrial Submarkets.
 
  As of May 1996, available industrial space in the Southern California Area
totaled approximately 1.1 billion square feet. Vacancy rates in the industrial
space market in the Southern California Area have declined from a high of
approximately 13.8% in 1992 to approximately 9.2% at December 31, 1995. At
December 31, 1995, the vacancy rate for the Industrial Properties was
approximately 1.6%. The following table shows the U.S. and Southern California
Area industrial vacancy rates for the period from 1991 through 1995.
 
                       INDUSTRIAL MARKET VACANCY TRENDS
                     U.S. AND THE SOUTHERN CALIFORNIA AREA
                                   1991-1995

                             [GRAPH APPEARS HERE]
 
<TABLE>
<CAPTION>
                             1991     1992     1993     1994     1995
<S>                         <C>      <C>      <C>      <C>      <C>
U.S.                         7.9%     8.7%     8.3%     7.4%     6.9%
Southern California Area    13.0%    13.8%    13.5%    12.6%     9.2%
</TABLE>
 
  Much of the existing space on the market in the Southern California Area is
considered to be functionally obsolete due to its age, services, and/or
configuration. As a result, the Southern California Area inventory for
industrial space is beginning to experience a modest growth in new
construction primarily of build-to-suit. In addition, speculative construction
also grew modestly in 1995 with approximately 6.0 million square feet of new
construction representing approximately 0.5% of the region's inventory.
However, this amount still is relatively modest when compared to 1989 levels
when new construction for the year reached approximately 34.0 million square
feet, and the existing building inventory exceeded approximately 1.1 billion
square feet.
 
  El Segundo Industrial Submarket. The Company owns four Industrial Properties
located in the City of El Segundo. At June 30, 1996, the Company's El Segundo
Industrial Properties were fully leased. The El Segundo industrial submarket
is part of the South Bay industrial market which includes the cities of
Torrance, Carson and Long Beach. At December 31, 1995, the South Bay
industrial market contained approximately 185 million rentable square feet of
industrial space, with a vacancy rate of approximately 8.2%.
 
  Orange County Industrial Submarket. The Company owns four Industrial
Properties in Orange County, three of which are in the City of Anaheim and one
of which is in the City of Garden Grove, which contain an aggregate of
approximately 395,000 rentable square feet. These properties accounted for
approximately 7.2% of the Company's base rent. At June 30, 1996, the Company's
Orange County Industrial Properties were 96.3% leased to five tenants. At
December 31, 1995, the Orange County industrial submarket contained
approximately 187 million rentable square feet, with a vacancy rate of
approximately 12.9%. The low current vacancy rate in the Southern California
industrial submarket as a whole is likely to put upward pressure on rents for
Southern California Class A buildings during 1996, with increases by as much
as 9% by the end of 1997.
 
 
                                      83
<PAGE>
 
 Development Property Submarkets.
 
  Thousand Oaks Submarket. The Company has entered into an exclusive agreement
to negotiate a Development and Disposition Agreement in connection with the
Thousand Oaks Civic Arts Plaza Retail and Entertainment Center, an
approximately 11-acre project in the City of Thousand Oaks. See "--Office
Submarkets--Thousand Oaks Submarket." As of December 31, 1995, the vacancy
rate of retail facilities in the greater City of Thousand Oaks (including
certain smaller surrounding communities and unincorporated areas) was
approximately 7.1% of a total of approximately 3.4 million rentable square
feet in the area. During 1995, there was net absorption of approximately
65,000 rentable square feet of retail space in this same area.
 
EXCLUDED PROPERTIES
 
  The Company will hold options to acquire (i) the SeaTac Office Center,
located just south of Seattle, Washington, (ii) a three-building office
complex located in El Segundo, California and (iii) parcels comprising an
aggregate of approximately 18 acres located at Calabasas Park Centre, in
Calabasas, California at the respective purchase price for each of the
properties as discussed below. Each of the office properties was developed and
has been leased and managed by the Kilroy Group and each option property is
currently owned by a partnership controlled by John B. Kilroy, Sr. and John B.
Kilroy, Jr. The SeaTac Office Center option is exercisable on or before the
first anniversary of the Offering. If, however, the owners of the SeaTac
Office Center have not satisfied certain conditions to the transfer of such
property within 270 days following consummation of the Offering, the option
term shall be extended to the date 90 days following the date such conditions
are satisfied. The option for Calabasas Park Centre is exercisable on or
before the first anniversary of the Offering. The option for the office
complex located on North Sepulveda Boulevard in El Segundo is exercisable on
or before the seventh anniversary of the consummation of the Offering. The net
purchase price for the SeaTac Office Center will be payable in Units. The
purchase price for the office complex in El Segundo, California and the
parcels located at the Calabasas Park Centre will be payable in cash,
provided, however, that if the option for the office complex in El Segundo is
exercised after the first anniversary of the consummation of the Offering, the
purchase price will be payable in cash or Units at the election of the seller.
 
  In the event that the owner of a property receives an offer from a third
party for the master lease or purchase of such property, such owner may give
notice to the Company, which notice shall include the proposed purchase price,
leasing terms and/or other economic terms of the proposed transfer or lease of
such property. The Company shall then have 60 days to give notice of its
election to acquire or lease such property at the lower of the applicable
option price or the proposed purchase price or lease terms. In the event that
the Company does not give such notice, the option to such property shall be
suspended and the owner may proceed with the sale or lease of such parcel
pursuant to the terms of such offer, provided that the economic terms may be
up to 5% below that described in such notice; provided, however, that (i) with
respect to the SeaTac Office Center, if the owner enters into an agreement to
sell or lease the SeaTac Office Center for an amount in excess of the option
price, and the conditions to the transfer of such property to the Company were
not satisfied at the date the owner gave notice of the proposed transfer, and
(ii) with respect to any sale of the approximately 18 acres located at
Calabasas Park Centre discussed below, then in either event the Company shall
have the right to acquire at the option price the owners' rights and related
monetary obligations under the respective sales agreement. In the event the
owners of such property (i) have not entered into a letter of intent for the
sale or lease of such property within 180 days following the notice to the
Company referenced above, or (ii) have not completed the sale of the
respective property within 270 days following such notice, then the Company's
option with respect to such property shall be reinstated, up to the expiration
date of the option. The Company's option shall be subject to any arrangements
entered into by the Kilroy Group in connection with any financing,
recapitalization or leasing of the Property including, without limitation, any
rights of the lender(s) with respect to such property with respect to a
transfer pursuant to the applicable option. In addition, the office properties
will be managed by the Operating Partnership pursuant to a management
agreement on market terms.
 
  SeaTac Office Center at Seattle-Tacoma International Airport. The Kilroy
Group developed and operates the SeaTac Office Center ("SeaTac"), south of
Seattle in SeaTac, Washington, a Class A office development in the Southend
submarket of the Puget Sound region. SeaTac is comprised of two 12-story
towers (constructed in 1977 and 1980, respectively) and a 4-level office and
garage structure with two floors of office space on top (constructed in 1980),
all with views of the Olympic and Coastal mountain ranges. The site is located
directly
 
                                      84
<PAGE>
 
across from the Seattle-Tacoma International Airport. The facility currently
contains an aggregate of approximately 530,000 square feet of office space.
Current zoning permits up to an additional 500,000 square feet of development.
The facility features 24-hour on-site security and management, parking for
over 1,900 vehicles, computer training and consultation, travel agencies, a
24-hour restaurant and an airport shuttle service that is free to tenants. As
of June 30, 1996, SeaTac had approximately 334,000 rentable square feet of
available office space. Major tenants include First Nationwide Mortgage
Corporation, Key Bank of Washington, Lynden, Inc., National Chemsearch,
Northwest Airlines, Inc., ITT Rayonier, Inc., Seattle-First National Bank and
Transamerica Financial Services, Inc.
 
  SeaTac is situated on an approximately 17-acre site subject to two long-term
ground leases and an airspace lease. The initial term of the ground leases
runs through December 31, 2032, and may be extended for an additional period
of thirty years. Payments under the ground leases are subject to adjustment
for increases in the CPI every five years. Payments under the airspace lease
are made monthly. Aggregate payments under the two ground leases and the
airspace lease for the year ended December 31, 1995 totaled approximately
$317,500. As of June 30, 1996, the properties were encumbered by a first
mortgage loan having an outstanding principal balance of $20,153,300. The loan
bears interest at a rate of 9.75% per year and is scheduled to mature on
May 15, 2001.
 
  The exercise price for SeaTac Office Center will be an amount equal to the
approximate fair market value as of the date of the Offering, less
liabilities, if any, assumed by the Company.
 
  Calabasas Park Centre. The Kilroy Group also owns Calabasas Park Centre, an
approximately 66-acre site (representing approximately 45 developable acres
net of acreage required for streets and contractually required open areas) in
the City of Calabasas located immediately west of the San Fernando Valley
which is presently entitled for over one million rentable square feet of
office, retail and hotel development, and for which future entitlements are
expected to include residential development. The property has substantially
all significant infrastructure improvements in place. The Kilroy Group is
actively marketing for sale various parcels totaling approximately 27 acres
for neighborhood retail, hotel and residential development, of which
approximately 1.7 acres is proposed to be dedicated to the City of Calabasas
for civic use. The Kilroy Group has received offers with respect to certain
parcels and is pursuing such offers in the ordinary course of business,
although there is no assurance that any such transactions will be completed in
the near term. The principals of KI who are directors and/or executive
officers of the Company will spend an immaterial amount of time in connection
with any sales of parcels of Calabasas Park Centre. The remaining
approximately 18 acres for which the Company has been granted an option is
entitled for over 500,000 rentable square feet for office, hotel and limited
retail use. Management believes that such property will be used primarily as
office space and may be appropriate for possible acquisition by the Company.
 
  Pursuant to the terms of the applicable option agreement, the purchase price
for the parcels located at Calabasas Park Centre will be equal to the total
accumulated costs, as of the date such option is exercised, in connection with
acquisition of rights with respect to, and the entitlement and development of
such property, including, without limitation, property taxes, predevelopment
and entitlement costs and fees, and related bond financing costs.
 
  North Sepulveda Boulevard, El Segundo. The Kilroy Group developed and
operates a three-building office complex located on an over 3.5-acre parcel in
El Segundo, California, adjacent to LAX. The complex is comprised of an 11-
story office building (constructed in 1972), an eight-story office building
(constructed in 1962) and a seven-level parking structure with retail space on
the ground floor (constructed in 1972), encompassing an aggregate of
approximately 360,000 rentable square feet of office space and approximately
5,600 rentable square feet of retail space. The properties have convenient
access to LAX and the I-105 Freeway. As of June 30, 1996, the office space was
100% leased to Hughes Space & Communications (of which approximately 60% is
occupied) at an average annual triple net base rent per net rentable square
foot of $17.91, subject to a lease scheduled to expire on February 28, 1998.
Management believes that in light of the near-term expiration of the current
lease and the uncertainty of whether the current rental rate will approximate
market rental rates at the time of expiration, this office complex is not
appropriate for inclusion in the Company's portfolio at this time. As of June
30, 1996, the properties were encumbered by a first mortgage loan having an
outstanding principal balance of approximately $61.6 million. The loan bears
interest at a rate of 9.63% per year
 
                                      85
<PAGE>
 
and is scheduled to mature on February 1, 2005. This property is also
encumbered by a second mortgage loan having an outstanding principal balance
as of June 30, 1996 of $4.4 million. This loan bears interest at a rate of
9.75% per year and is scheduled to mature on February 28, 1998.
 
  Pursuant to the terms of the applicable option agreement, the purchase price
for the North Sepulveda Boulevard properties is equal to the sum of (i) the
then outstanding mortgage indebtedness secured by the respective properties,
plus (ii) $1, plus (iii) the aggregate amount of capital contributed by the
beneficial owners of the property, net of actual cash distributions
distributed in respect of such beneficial owners, during the period beginning
on the date of the consummation of the Offering, plus (iv) an annualized
return of 8.0% on the amount in excess of $5.0 million, if any, as determined
pursuant to clause (iii) preceding. The Company's option to purchase the North
Sepulveda Boulevard properties is subject to a right of first offer held by
Hughes Space & Communications.
 
  In addition to the properties described above, the Company will not acquire
certain properties being held for sale by members of the Kilroy Group or which
are not of a type appropriate for inclusion in the Company's portfolio or
consistent with the Company's strategy, including an approximately three-acre
undeveloped parcel in Tampa, Florida, and a parcel which is subject to an
easement for railroad use, each beneficially owned and controlled by KI. Each
of the principals of KI who are directors and/or executive officers of the
Company will spend an immaterial amount of time managing these properties.
 
INSURANCE
 
  Management believes that the Properties are covered by adequate
comprehensive liability, rental loss, and all-risk (at full replacement cost)
insurance, provided by reputable companies, with commercially reasonable
deductibles, limits and policy specifications customarily carried for similar
properties. There are, however, certain types of losses which may be either
uninsurable or not economically insurable, such as losses due to floods, riots
or acts of war. Should an uninsured loss occur, the Company could lose both
its invested capital in and anticipated profits from the property.
 
UNINSURED LOSSES FROM SEISMIC ACTIVITY
 
  The Properties are located in areas that are subject to seismic activity.
Although the Company expects to have earthquake insurance on certain of the
Properties, should any Property sustain damage as a result of an earthquake,
or should losses exceed the amount of such coverage, the Company may incur
uninsured losses or losses due to deductibles or co-payments on insured
losses.
 
  All of the Properties were reviewed by an independent engineering
consultant. The review of each of the Properties included a review of the
probable loss associated with certain seismic activity. The estimated loss for
each of the Properties was determined based upon magnitudes for once in 50
year seismic event and once in 200 year seismic event. This analysis indicated
that in a once in 50 year seismic event, none of the Office Properties would
be expected to suffer damage loss in excess of 6% of the Properties'
respective estimated replacement cost, and only two of the Industrial
Properties would be expected to suffer damage loss in excess of 10% of the
Properties' respective estimated replacement cost. These two Industrial
Properties, located at 12691 Pala Drive, Garden Grove, California and 1230
South Lewis Street, Anaheim, California, are expected to suffer damage of
approximately 13% and 16%, respectively, of their estimated replacement cost
in a once in 50 year seismic event. In a once in 200 year seismic event, only
one of the Office Properties would be expected to suffer damage loss in excess
of 16% of its respective estimated replacement cost, while the Office Property
located at 185 South Douglas Street, El Segundo, California would be expected
to suffer damage loss of approximately 35% of its respective estimated
replacement cost. With respect to the Industrial Properties, only four would
be expected to suffer damage loss in excess of 25% of their respective
estimated replacement cost in a once in 200 year event, while the Industrial
Properties located at 12691 Pala Drive, Garden Grove, California and 1230
South Lewis Street, Anaheim, California, 2260 East El Segundo Boulevard, El
Segundo, California, 2270 East El Segundo Boulevard, El Segundo, California,
each would be expected to suffer damage loss of approximately 40% of their
respective estimated replacement cost.
 
  During the January 17, 1994 Northridge earthquake in the Los Angeles area,
which had a magnitude of approximately 6.7 on the Richter scale, the
Properties in the Southern California area sustained insignificant damage.
 
                                      86
<PAGE>
 
GOVERNMENT REGULATIONS
 
  Many laws and governmental regulations are applicable to the Properties and
changes in these laws and regulations, or their interpretation by agencies and
the courts, occur frequently.
 
  Costs of Compliance with Americans with Disabilities Act. Under the
Americans with Disabilities Act of 1990 (the "ADA"), all places of public
accommodation, effective beginning in 1992, are required to meet certain
federal requirements related to access and use by disabled persons. Compliance
with the ADA might require removal of structural barriers to handicapped
access in certain public areas where such removal is "readily achievable."
Noncompliance with the ADA could result in the imposition of fines or an award
of damages to private litigants. The impact of application of the ADA to the
Company's properties, including the extent and timing of required renovations,
is uncertain. If required changes involve a greater amount of expenditures
than the Company currently anticipates or if the changes must be made on a
more accelerated schedule than the Company currently anticipates, the
Company's ability to make expected distributions to stockholders could be
adversely affected.
 
  Environmental Matters. Under various federal, state and local laws,
ordinances and regulations relating to the protection of the environment, an
owner or operator of real estate may be held liable for the costs of removal
or remediation of certain hazardous or toxic substances located on or in the
property. These laws often impose liability without regard to whether the
owner was responsible for, or even knew of, the presence of such hazardous or
toxic substances. The costs of investigation, removal or remediation of such
substances may be substantial and, the presence of such substances may
adversely affect the owner's ability to rent or sell the property or to borrow
using such property as collateral. In addition, the presence of such
substances may expose it to liability resulting from any release or exposure
of such substances. Persons who arrange for the disposal or treatment of
hazardous or toxic substances at another location may also be liable for the
costs of removal or remediation of such substances at the disposal or
treatment facility, whether or not such facility is owned or operated by such
person. Certain environmental laws impose liability for release of asbestos-
containing materials into the air, and third parties may also seek recovery
from owners or operators of real properties for personal injury associated
with asbestos-containing materials and other hazardous or toxic substances. In
connection with the ownership (direct or indirect), operation, management and
development of real properties, the Company may be considered an owner or
operator of such properties or as having arranged for the disposal or
treatment of hazardous or toxic substances and, therefore, potentially liable
for removal or remediation costs, as well as certain other related costs,
including governmental penalties and injuries to persons and property.
 
  The Company believes that the Properties are in compliance in all material
respects with all federal, state and local laws, ordinances and regulations
regarding hazardous or toxic substances or petroleum products. The Company has
not been notified by any governmental authority, and is not otherwise aware,
of any material noncompliance, liability or claim relating to hazardous or
toxic substances or petroleum products in connection with any of its present
properties.
 
  All of the Properties were subject to Phase I or similar environmental
assessments by independent environmental consultants in connection with the
formation of the Company. Phase I assessments are intended to discover
information regarding, and to evaluate the environmental condition of, the
surveyed property and surrounding properties. Phase I assessments generally
include an historical review, a public records review, an investigation of the
surveyed site and surrounding properties, and preparation and issuance of a
written report, but do not include soil sampling or subsurface investigations.
The Company's environmental assessments of the Properties have not revealed
any environmental liability that the Company believes would have a material
adverse effect on the Company's business, assets or results of operations
taken as a whole, nor is the Company aware of any such material environmental
liability. Nonetheless, it is possible that the Company's assessments do not
reveal all environmental liabilities or that there are material environmental
liabilities of which the Company is unaware. Moreover, there can be no
assurance that (i) future laws, ordinances or regulations will not impose any
material environmental liability or (ii) the current environmental condition
of the Properties will not be affected by tenants, by the condition of land or
operations in the vicinity of the Properties (such as the
 
                                      87
<PAGE>
 
presence of underground storage tanks), or by third parties unrelated to the
Company. If compliance with the various laws and regulations, now existing or
hereafter adopted, exceeds the Company's budgets for such items, the Company's
ability to make expected distributions to stockholders could be adversely
affected.
 
  Other Regulations. The Properties are also subject to various federal, state
and local regulatory requirements such as state and local fire and life safety
requirements. Failure to comply with these requirements could result in the
imposition of fines by governmental authorities or awards of damages to
private litigants. The Company believes that the Properties are currently in
material compliance with all such regulatory requirements. However, the
requirements will not be changed or that new requirements will not be imposed
which would require significant unanticipated expenditures by the Company and
could have an adverse effect on the Company's Funds from Operations and
expected distributions.
 
  The City of Los Angeles has enacted certain regulations relating to the
repair of welded steel moment frame buildings located in certain areas damaged
as a result of the Northridge Earthquake. As currently enacted, such
regulations do not apply to the Properties. There can be no assurance,
however, that similar regulations will not be adopted by other cities in which
the Properties are located or that new requirements will not be imposed which
would require significant unanticipated expenditures by the Company and could
have a material adverse effect on the Company's Funds from Operations and cash
available for distribution.
 
  Except as described in this Prospectus, there are no other laws or
regulations which have a material effect on the Company's operations, other
than typical state and local laws affecting the development and operation of
real property, such as zoning laws. See "Risk Factors--Government
Regulations," "Certain Provisions of Maryland Law and of the Company's
Articles of Incorporation and Bylaws," "Partnership Agreement of Operating
Partnership," "Federal Income Tax Consequences" and "ERISA Considerations."
 
MANAGEMENT AND EMPLOYEES
 
  The Operating Partnership has been structured as the entity through which
the Company will conduct substantially all of its operations. The Services
Company has been structured as an entity through which the Company will
conduct substantially all of its development activities and related
operations. The Company generally has full, exclusive and complete
responsibility and discretion in the management and control of the Operating
Partnership, but not the Services Company.
 
  The Company (primarily through the Operating Partnership and the Services
Company) initially will employ approximately 46 persons. The Company, the
Operating Partnership and the Services Company will employ substantially all
of the professional employees of KI that are currently engaged in asset
management and administration. The Operating Partnership will employ
approximately 17 on-site building employees who currently provide services for
the Properties. The Company, the Operating Partnership and the Services
Company believe that relations with their employees are good.
 
LEGAL PROCEEDINGS
 
  Neither the Company nor any of the Properties is subject to any material
litigation nor, to the Company's knowledge, is any material litigation
threatened against any of them, other than routine litigation arising in the
ordinary course of business, which is expected to be covered by liability
insurance. In May 1994, KI permitted an uncontested foreclosure by the Bank of
America on a five-story office building located in El Segundo, California as
part of an overall renegotiation of KI's loans and lines of credit. In July
1993, KI sold Kilroy Long Beach Phase I to the mortgagee thereof, at a
purchase price slightly in excess of the outstanding balance of such mortgage.
KI continued to lease and manage such facility after such sale. In December
1994, the owner of Hidden River Corporate Park located in Tampa, Florida
permitted the uncontested foreclosure of the deeds of trust and certain other
property pledged as collateral to secure certain development loans related to
such property. KI developed the property, an approximately 210-acre office
park, and at the time of the foreclosure John B. Kilroy, Sr. and John B.
Kilroy, Jr. were limited partners in the company which owned the property.
 
                                      88
<PAGE>
 
                  POLICIES WITH RESPECT TO CERTAIN ACTIVITIES
 
  The Company's policies with respect to the following activities have been
determined by the Board of Directors of the Company and may be amended or
revised from time to time at the discretion of the Board of Directors, without
a vote of the stockholders of the Company, if they determine in the future
that such a change is in the best interests of the Company and its
stockholders.
 
INVESTMENT POLICIES
 
  Investment in Real Estate or Interests in Real Estate. The Company will
conduct all its investment activities through the purchase of interests in the
Operating Partnership until all Units have been redeemed or exchanged for
shares of Common Stock and the Operating Partnership ceases to exist. During
such period, the proceeds of all equity capital raised by the Company will be
contributed to the Operating Partnership in exchange for Units in the
Operating Partnership. The investment objectives of the Company are to achieve
stable cash flow available for distributions and, over time, to increase cash
flow and portfolio value by actively managing the Properties, developing
properties, acquiring additional properties that, either as acquired or after
value-added activities by the Company (such as improved management and leasing
services and renovations), will produce additional cash flows and by extending
its management, development and leasing business with third-parties. The
Company's policy is to develop and acquire properties primarily for generation
of current income and appreciation of long-term value.
 
  The Company expects to pursue its investment objectives primarily through
the ownership of quality office, industrial and retail properties. The
Properties will initially consist of ten Office Properties and nine Industrial
Properties. The Company currently contemplates developing and acquiring
additional office buildings and industrial buildings primarily in Southern
California, although future investments could be made outside of such area or
in different property categories if the Board of Directors determines that
such acquisitions and developments would be desirable. The Company also will
be developing retail properties in connection with the development of the
Thousand Oaks Civic Arts Plaza, and may develop other retail properties as
favorable development opportunities arise. The Company will not have any limit
on the amount or percentage of its assets invested in any single property or
group of related properties. The Board of Directors may establish limitations
as it deems appropriate from time to time. No limitations have been set on the
number of properties in which the Company will seek to invest or on the
concentration of investments in any one geographic region.
 
  The Company may develop, purchase or lease income-producing properties for
long-term investment and expand, improve or sell its Properties, in whole or
in part, when circumstances warrant. The Company may also participate with
other entities in property ownership through joint ventures or other types of
co-ownership. Equity investments by the Company may be subject to existing or
future mortgage financing and other indebtedness which will have priority over
the equity interests of the Company.
 
  As the sole general partner of the Operating Partnership, the Company will
also determine the investment policies of the Operating Partnership. Under the
Partnership Agreement, all future investments must be made through the
Operating Partnership. See "Partnership Agreement of the Operating
Partnership--Management."
 
  Investments in Real Estate Mortgages. While the Company will emphasize
equity real estate investments, the Company may, in its discretion, invest in
mortgages and other real estate interests consistent with the Company's
qualification as a REIT. The Company has not previously invested in mortgages
and does not presently intend to invest in mortgages or deeds of trust, but
may invest in participating or convertible mortgages if the Company concludes
that it may benefit from the cash flow or any appreciation in the value of the
subject property. Such mortgages are similar to equity participations.
Investments in real estate mortgages run the risk that one or more borrowers
may default under such mortgages and that the collateral securing such
mortgages may not be sufficient to enable the Company to recoup its full
investment.
 
                                      89
<PAGE>
 
  Securities of or Interests in Persons Primarily Engaged in Real Estate
Activities and Other Issuers. Subject to the percentage of ownership
limitations and gross income tests necessary for the Company to qualify and
maintain its status as a REIT, the Company may invest in securities of other
entities engaged in real estate activities or securities of other issuers. See
"Federal Income Tax Considerations--Taxation of the Company." The Company does
not currently intend to invest in the securities of other issuers except in
connection with acquisitions of indirect interests in properties (normally
general or limited partnership interests in special purpose partnerships
owning properties) and in connection with the acquisition of substantially all
of the economic interest in a real estate-related operating business where
such investments would be consistent with the Company's investment policies.
Investment in these securities is also subject to the Company's policy not to
be treated as an investment company under the Investment Company Act of 1940.
The risks of investing in real estate-related operating businesses include the
risk that contracts with third parties may be terminated by such third
parties, not renewed upon expiration or renewed on less favorable terms, and
the risk that fee income will decrease as a result of a decline in general
real estate market conditions.
 
DISPOSITIONS
 
  The Company has no current intention to cause the disposition of any of the
Properties, although it reserves the right to do so if the Board of Directors
determines that such action would be in the best interests of the Company.
 
FINANCING
 
  The Company has established its debt policy relative to the market
capitalization of the Company rather than to the book value of its assets, a
ratio that is frequently employed. Upon completion of the Offering and the
Formation Transactions, the debt to total market capitalization ratio (i.e.,
the total consolidated debt of the Company as a percentage of the market value
of the issued and outstanding shares of Common Stock and Units plus total
consolidated debt) of the Company will be approximately 25.6% (assuming an
initial public offering price of $20.00 per share of Common Stock). This ratio
will fluctuate with changes in the price of the Common Stock (and the issuance
of additional shares of Common Stock) and differs from the debt-to-book
capitalization ratio, which is based upon book value. As the debt-to-book
capitalization ratio may not reflect the current income potential of a
company's assets and operations, the Company believes that debt-to-total
market capitalization ratio provides a more appropriate indication of leverage
for a company whose assets are primarily income-producing real estate. The
total market capitalization of the Company, however, is more variable than
book value, and does not necessarily reflect the fair market value of the
underlying assets of the Company at all times. Although the Company will
consider factors other than total market capitalization in making decisions
regarding the incurrence of indebtedness (such as the purchase price of
properties to be acquired with debt financing, the estimated market value of
such properties upon refinancing and the ability of particular properties and
the Company as a whole to generate cash flow to cover expected debt service),
there can be no assurance that the ratio of indebtedness to total market
capitalization (or to any other measure of asset value) will be consistent
with the expected level of distributions to the Company's stockholders.
 
  The Board of Directors has adopted a policy of limiting the Company's
indebtedness to approximately 50% of its total market capitalization, but the
organizational documents of the Company do not contain any limitation on the
amount or percentage of indebtedness, funded or otherwise, that the Company
may incur. In addition, the Company may from time to time modify its debt
policy in light of then current economic conditions, relative costs of debt
and equity capital, market values of its properties, general conditions in the
market for debt and equity securities, fluctuations in the market price of its
Common Stock, growth and acquisition opportunities and other factors.
Accordingly, the Company may increase or decrease its debt to market
capitalization ratio beyond the limits described above.
 
  To the extent that the Board of Directors decides to obtain additional
capital, the Company may raise such capital through additional equity
offerings (including offerings of senior or convertible securities and
preferred
 
                                      90
<PAGE>
 
stock), sales of investments, bank and other institutional borrowings, the
issuance of debt securities (which may be convertible into or exchangeable for
shares of Common Stock or be accompanied by warrants to purchase shares of
Common Stock) or retention of cash flow (subject to provisions in the Code
concerning taxability of undistributed REIT income), or a combination of these
methods. In the event that the Board of Directors determines to raise
additional equity capital, the Board has the authority, without stockholder
approval, to issue additional shares of Common Stock or other capital stock
(including securities senior to the Common Stock) of the Company in any
manner, and on such terms and for such consideration, it deems appropriate,
including in exchange for property. Existing stockholders would have no
preemptive right to purchase shares issued in any offering, and any such
offering might cause a dilution of a stockholder's investment in the Company.
As long as the Operating Partnership is in existence, the net proceeds of the
sale of Common Stock by the Company will be contributed to the Operating
Partnership as a contribution to capital in exchange for a number of Units in
the Operating Partnership equal to the number of shares of Common Stock sold
by the Company. The Company presently anticipates that any additional
borrowings would be made by the Operating Partnership, although the Company
might incur indebtedness, the proceeds of which would be re-loaned to the
Operating Partnership on the same terms and conditions as are applicable to
the Company's borrowing of such funds. See "Partnership Agreement of the
Operating Partnership--Capital Contribution."
 
  Borrowings may be unsecured or may be secured by any or all of the assets of
the Company, the Operating Partnership or any existing or new property-owning
partnership and may have full or limited recourse to all or any portion of the
assets of the Company, the Operating Partnership or any existing or new
property-owning partnership. Indebtedness incurred by the Company may be in
the form of bank borrowings, purchase money obligations to the sellers of the
properties, publicly or privately placed debt instruments or financing from
institutional investors or other lenders. There are no limits on the number or
amount of mortgages or interests which may be placed on any one property. In
addition, such indebtedness may be recourse to all or any part of the property
of the Company or may be limited to the particular property for which the
indebtedness relates. The proceeds from any borrowings by the Company may be
used for working capital, to refinance existing indebtedness, to finance the
acquisition, expansion or development of properties and for the payment of
distributions.
 
  The Board of Directors also has the authority to cause the Operating
Partnership to issue additional Units in any manner (and on such terms and for
such consideration) as it deems appropriate, including in exchange for
property. See "Partnership Agreement of the Operating Partnership--Issuance of
Additional Units."
 
  In the future, the Company may seek to extend, expand, reduce or renew the
Credit Facility, or obtain new credit facilities or lines of credit, subject
to its general policy of debt capitalization. Future credit facilities and
lines of credit may be used for the purpose of making acquisitions or capital
improvements, providing working capital or meeting the taxable income
distribution requirements for REITs under the Code if the Company has taxable
income without receipt of cash sufficient to enable the Company to meet such
distribution requirements.
 
WORKING CAPITAL RESERVES
 
  The Company will maintain working capital reserves (and when not sufficient,
access to borrowings) in amounts that the Board of Directors determines from
time to time to be adequate to meet normal contingencies in connection with
the operation of the Company's business and investments.
 
CONFLICT OF INTEREST POLICIES
 
  Directors and officers of the Company may be subject to certain conflicts of
interests in fulfilling their responsibilities to the Company. The Company has
adopted certain policies designed to minimize potential conflicts of interest.
 
  Terms of Transfers. The terms of the transfers of the Properties to the
Operating Partnership by the Continuing Investors, and the terms of each of
the option agreements relating to the Excluded Properties, were not determined
through arm's-length negotiation. Partners and affiliates of the Kilroy Group
who are directors
 
                                      91
<PAGE>
 
and officers of the Company had a substantial economic interest in the
entities transferring the Properties and granting the options. Consequently,
such directors and officers may be subject to a conflict of interest with
respect to their obligations as management of the Company to enforce the terms
of the agreements relating to such transfers, including the indemnification
provisions thereof. However, the Independent Directors must approve any
transactions between the Company and members of the Kilroy Group including the
enforcement of the terms of the transfers. See "Risk Factors--Conflicts of
Interests" and "Management."
 
  Sale or Refinancing of Properties. The sale of certain of the Properties may
cause adverse tax consequences to members of the Kilroy Group, as compared to
the effects on the Company. In addition, a significant reduction in debt
encumbering such Properties could cause adverse tax consequences to the
members of the Kilroy Group, as compared to the effects on the holders of
Units or shares of Common Stock. As a result, certain officers and directors
who are members of the Kilroy Group might not favor such a sale of the
Properties or a significant reduction in debt even though such sale or debt
reduction could be beneficial to the Company. The decision as to whether to
proceed with any such sale or debt reduction would be made by the Board of
Directors.
 
  Noncompetition Agreements. John B. Kilroy, Sr. has agreed, during the term
of his service as a member of the Company's Board of Directors, not to conduct
property development, acquisition or management activities with respect to
office and industrial property in greater Southern California or in any other
market in which the Company owns, develops or manages property. John B.
Kilroy, Sr. will not be restricted, however, from continuing to own, manage
and lease certain other existing real estate investments owned by him
including, without limitation, certain properties described under "Business
and Properties--Excluded Properties."
 
  John B. Kilroy, Jr. has agreed, during the term of his employment agreement
and for one year thereafter (unless terminated by the Company without cause),
and for so long as he is a member of the Company's Board of Directors, not to
conduct property development, acquisition, sale or management activities in
any market. Notwithstanding the foregoing, John B. Kilroy, Jr. will not be
restricted from continuing to own, manage, lease, transfer and exchange
certain existing real estate investments owned by him described under the
caption "Business and Properties--Excluded Properties" or owning interests in
real property not competitive with the Company.
 
  In addition, with respect to the property located at Calabasas Park Centre,
each of Mr. John B. Kilroy, Sr. and Mr. John B. Kilroy, Jr. has agreed to be
limited solely to activities related to the marketing, entitlement and sale of
such properties. Such properties are being actively marketed for sale and are
expected to be sold in the ordinary course of business. Mr. John B. Kilroy,
Sr. and Mr. John B. Kilroy, Jr. each will spend an immaterial amount of time
in connection with the sale of such properties. In addition, each has agreed
not to sell such properties located at Calabasas Park Centre to a real estate
investment trust with an existing portfolio of office or industrial properties
unless first offered to the Company on the same economic terms.
 
  Policies Applicable to All Directors. Under the Company's bylaws and
Maryland law, a contract or transaction between the Company and any of its
directors or between the Company and any other corporation, firm or other
entity in which any of its directors is a director or has a material financial
interest is not void or voidable solely because of such interest if (i) the
contract or transaction is approved, after disclosure of the interest, by the
affirmative vote of a majority of the disinterested directors, or by the
affirmative vote of a majority of the votes cast by disinterested
stockholders, or (ii) the contract or transaction is established to have been
fair and reasonable to the Company.
 
  The Company's Articles of Incorporation provide that a majority of the
Company's Board of Directors must be Independent Directors. See "Certain
Provisions of Maryland Law and of the Company's Articles of Incorporation and
Bylaws--Board of Directors."
 
OTHER POLICIES
 
  The Company intends to operate in a manner that will not subject it to
regulation under the Investment Company Act of 1940. The Company does not
intend (i) to invest in the securities of other issuers (other than the
Operating Partnership and the Services Company) for the purpose of exercising
control over such issuer, (ii) to underwrite securities of other issuers or
(iii) to trade actively in loans or other investments.
 
                                      92
<PAGE>
 
  The Company has authority to offer shares of Common Stock or other
securities and to repurchase or otherwise reacquire shares of Common Stock or
any other securities in the open market or otherwise and may engage in such
activities in the future. The Company may, under certain circumstances,
purchase shares of Common Stock in the open market, if such purchases are
approved by the Board of Directors. The Board of Directors has no present
intention of causing the Company to repurchase any of the shares of Common
Stock, and any such action would be taken only in conformity with applicable
federal and state laws and the requirements for qualifying as a REIT under the
Code and the Treasury Regulations. Although it may do so in the future, except
in connection with the Formation Transactions, the Company has not issued
Common Stock or any other securities in exchange for property, nor has it
reacquired any of its Common Stock or any other securities. The Company
expects to issue shares of Common Stock to holders of Units upon exercise of
their exchange rights in the Partnership Agreement of the Operating
Partnership. The Company has not made loans to other entities or persons,
including its officers and directors. The Company may in the future make loans
to joint ventures in which it participates in order to meet working capital
needs. The Company has not engaged in trading, underwriting or agency
distribution or sale of securities of other issuers other than the Operating
Partnership, nor has the Company invested in the securities of other issuers
other than the Operating Partnership and the Services Company for the purposes
of exercising control, and does not intend to do so.
 
  At all times, the Company intends to make investments in such a manner as to
be consistent with the requirements of the Code for the Company to qualify as
a REIT unless, because of changing circumstances or changes in the Code (or in
Treasury Regulations), the Board of Directors of the Company determines that
it is no longer in the best interests of the Company to qualify as a REIT.
 
                                      93
<PAGE>
 
                                 THE FINANCING
 
THE MORTGAGE LOAN
 
  The Company, on behalf of the Operating Partnership, intends to obtain a
written commitment for a mortgage loan of $75.0 million (the "Mortgage Loan"),
the closing of which is a condition to the consummation of the Offering. The
proceeds of the Mortgage Loan will principally be used to repay existing
indebtedness on the Properties. Payment of principal and interest on the
Mortgage Loan is expected to be secured by certain Properties. The Mortgage
Loan is expected to require monthly principal and interest payments based on a
fixed rate, amortizing over a 25-year period, maturing in 2003.
 
  Subject to certain limited exceptions, the Mortgage Loan will be non-
recourse to the Company. In addition, the terms of the Mortgage Loan will
include customary representations, warranties and events of default and will
require the Operating Partnership to comply with certain affirmative and
negative covenants. The Company and the Operating Partnership will be
responsible for payment of the lender's fees and expenses associated with
providing the Mortgage Loan.
 
THE CREDIT FACILITY
 
  The Company, on behalf of the Operating Partnership, expects to obtain a
written commitment to establish a three-year, $100 million revolving credit
facility (the "Credit Facility") which the Company and the Operating
Partnership expect to enter into concurrently with the consummation of the
Offering. The Credit Facility will be used primarily to finance acquisitions
of additional properties and to finance the development of properties,
although a portion may be used for general working capital purposes. Payment
of principal and interest is expected to be secured by certain Properties. In
addition, borrowings under the Credit Facility are expected to be recourse
obligations to the Operating Partnership and the Company.
 
  The Operating Partnership's ability to borrow under the Credit Facility will
be subject to its compliance with a number of customary financial and other
covenants on an ongoing basis, including maintenance of loan-to-value and debt
service coverage ratios, limitations on additional indebtedness and a minimum
net worth requirement. The Credit Facility is expected to require monthly
interest only (LIBOR based) payments on the total borrowings outstanding under
the Credit Facility each month. The Company and the Operating Partnership
anticipate that the Credit Facility will be either extended, renewed or
refinanced through the issuance of debt or equity securities at its maturity.
The Company and the Operating Partnership will be responsible for payment of
the lender's fees and expenses associated with providing the Credit Facility.
Neither the Company nor the Operating Partnership will have any variable rate
debt at the time of the Offering.
 
  If the initial public offering price for the Common Stock is less than the
midpoint of the range set forth on the cover page of this Prospectus, the
Company expects to make up any shortfall between the aggregate net proceeds of
the Offering and the Mortgage Loan, and the intended uses thereof, with
borrowings under the Credit Facility. See "Use of Proceeds."
 
                                      94
<PAGE>
 
                                  MANAGEMENT
 
DIRECTORS AND EXECUTIVE OFFICERS
 
  Upon consummation of the Offering, the Board of Directors will consist of
five members, including a majority of directors who are Independent Directors.
Directors of the Company will be divided into three classes serving staggered
three-year terms (except initial terms expiring in 1997 and 1998) with
directors serving until the election and qualification of their successors.
The first annual meeting of stockholders of the Company after the Offering
will be held in 1997. Each of the proposed directors named below has been
nominated for election upon the consummation of the Offering and has consented
to serve. In addition to the proposed directors listed below, prior to the
consummation of the Offering, the Company will appoint three additional
members to serve as Independent Directors to the Board of Directors. See
"Certain Provisions of Maryland Law and of the Company's Articles of
Incorporation and Bylaws--Board of Directors." Subject to rights pursuant to
any employment agreements, officers of the Company serve at the pleasure of
the Board of Directors.
 
  The following table sets forth certain information with respect to the
directors, proposed directors and executive officers of the Company
immediately following the completion of the Formation Transactions and
consummation of the Offering:
 
<TABLE>
<CAPTION>
   NAME                     AGE                    POSITION                     TERM EXPIRES
   ----                     ---                    --------                     ------------
   <S>                      <C> <C>                                             <C>
   John B. Kilroy, Sr......  74 Chairman of the Board of Directors
   John B. Kilroy, Jr......  47 President, Chief Executive Officer and Director
   Jeffrey C. Hawken.......  37 Chief Operating Officer
   Campbell Hugh Greenup...  43 General Counsel
   A. Christian Krogh......  48 Vice President, Asset Management
</TABLE>
 
  The following is a biographical summary of the experience of the directors,
proposed directors and executive officers of the Company:
 
    JOHN B. KILROY, SR., age 74, is founder and Chairman of KI and is a
  nationally recognized member of the real estate community, providing the
  Company with strategic leadership and a broadly-based network of
  relationships. Mr. Kilroy is a trustee of the Independent Colleges of
  Southern California, serves on the Board of Directors of Pepperdine
  University, and is a past trustee of Harvey Mudd College.
 
    JOHN B. KILROY, JR., age 47, has been responsible for the overall
  management of all facets of KI and its various affiliates since 1981. Mr.
  Kilroy has been involved in all aspects of commercial and industrial real
  estate acquisition, sales, development, construction, leasing, financing,
  and entitlement since 1967 and has worked for KI for over twenty-five
  years. Mr. Kilroy became President of KI in 1981 and was elected Chief
  Executive Officer in 1991. Prior to that time he held positions as
  Executive Vice President and Vice President--Leasing & Marketing. He is a
  member of the National Realty Committee and the Urban Land Institute, and
  is a trustee of the El Segundo Employers Association, and a past trustee of
  Viewpoint School, the Jefferson Center For Character Education and of the
  National Fitness Foundation.
 
    JEFFREY C. HAWKEN, age 37, has been responsible for the management and
  operations of KI's real estate portfolio. Mr. Hawken's activities have
  included leasing, asset and facility management, with an emphasis on
  quality of service, operational cost reduction and code compliance. He has
  also served on KI's acquisitions and executive committees. Mr. Hawken
  joined KI in 1980, as a Senior Financial Analyst, and has been involved in
  property and asset management with the Company since May 1983. Since that
  time, he attained the designation of Real Property Administrator (RPA)
  through the Building Owner's and Manager's Association (BOMA).
 
    CAMPBELL HUGH GREENUP, age 43, has over fourteen years of experience in
  the real estate industry. Mr. Greenup joined KI in 1986 as Assistant
  General Counsel and had responsibility for a significant portion of the
  Company's legal affairs, including transaction negotiation and
  documentation. In addition, he has
 
                                      95
<PAGE>
 
  been responsible for all the Company's development activities, including
  land acquisition and entitlement, project development, leasing and
  disposition. In this role, he was also President of Kilroy Technologies
  Company, LLC, the Kilroy services entity, and directed all of the Company's
  fee development activities. Mr. Greenup is a member of the American Bar
  Association, the Urban Land Institute-IOPC Gold Committee, the National
  Association of Corporate Real Estate Executives and the Los Angeles County
  Beach Advisory Commission.
 
    A. CHRISTIAN KROGH, age 48, was previously Treasurer for KI and was
  responsible for all cash flow forecasting, preparing variance reports,
  monitoring short-term cash needs and investments, interfacing with lenders,
  performing credit analysis for prospective tenants, interfacing with asset
  management on the day-to-day activities of the Company, as well as other
  traditional treasurer's functions. Mr. Krogh was responsible for overseeing
  KI's personnel functions, obtaining and monitoring property insurance and
  coordinating employee benefit programs. In the 15 years prior to joining KI
  Mr. Krogh held similar positions with two other real estate companies.
 
COMMITTEES OF THE BOARD OF DIRECTORS
 
  Audit Committee. Promptly following the consummation of the Offering, the
Board of Directors will establish an audit committee (the "Audit Committee").
The Audit Committee will be established to make recommendations concerning the
engagement of independent public accountants, review with the independent
public accountants the scope and results of the audit engagement, approve
professional services provided by the independent public accountants, review
the independence of the independent public accountants, consider the range of
audit and non-audit fees and review the adequacy of the Company's internal
accounting controls. The Audit Committee will initially consist of two or more
Independent Directors.
 
  Independent Committee. Promptly following the consummation of the Offering,
the Board of Directors will establish an independent committee (the
"Independent Committee") consisting solely of Independent Directors. The
Independent Committee will be established to approve transactions between the
Company and John B. Kilroy, Sr. or John B. Kilroy, Jr. and their respective
affiliates.
 
  Executive Committee. Promptly following the consummation of the Offering,
the Board of Directors will establish an executive committee (the "Executive
Committee"). Subject to the Company's conflict of interest policies, the
Executive Committee will be granted the authority to acquire and dispose of
real property and the power to authorize, on behalf of the full Board of
Directors, the execution of certain contracts and agreements, including those
related to the borrowing of money by the Company (and, consistent with the
Partnership Agreement of the Operating Partnership, to cause the Operating
Partnership to take such actions.) The Executive Committee will include John
B. Kilroy, Sr., John B. Kilroy, Jr. and at least one Independent Director.
 
  Executive Compensation Committee. Promptly following the consummation of the
Offering, the Board of Directors will establish an executive compensation
committee (the "Executive Compensation Committee") to establish remuneration
levels for executive officers of the Company and implementation of the
Company's Stock Incentive Plan (as defined) and any other incentive programs.
The Executive Compensation Committee will initially consist of two or more
Independent Directors.
 
  The membership of the committees of the Board of Directors will be
established after the completion of the Formation Transactions and the
Offering. The Board of Directors may from time to time establish certain other
committees to facilitate the management of the Company.
 
COMPENSATION OF DIRECTORS
 
  The Company intends to pay its directors who are not officers of the Company
annual compensation which may include options to purchase shares of Common
Stock at the then current market value on the date of grant. These options
will have a term of ten years from the date of grant. Such directors will also
be reimbursed for expenses incurred to attend director and committee meetings.
Officers of the Company who are directors will not be paid any directors'
fees.
 
                                      96
<PAGE>
 
EXECUTIVE COMPENSATION
 
  Since the Company has no operating history, meaningful individual
compensation information for executive officers is not available for prior
periods. The compensation table below sets forth the annual base salary rates
and other compensation expected to be paid in 1997 to the Chief Executive
Officer and the Company's other executive officers who are expected to have a
total annual salary and bonus in excess of $100,000. The Company has entered
into employment agreements with certain of its executive officers as described
below. See "--Employment Agreements."
 
<TABLE>
<CAPTION>
                                                                  ESTIMATED ANNUAL
   NAME                                   POSITION                  COMPENSATION
   ----                                   --------                ----------------
   <S>                      <C>                                   <C>
   John B. Kilroy, Jr...... President and Chief Executive Officer
   Jeffrey C. Hawken....... Chief Operating Officer
   Campbell Hugh Greenup... General Counsel
   A. Christian Krogh...... Vice President, Asset Management
</TABLE>
 
EMPLOYMENT AGREEMENTS
 
  Each of John B. Kilroy, Jr. and Jeffrey C. Hawken will enter into employment
agreements with the Company providing for annual compensation in the amounts
set forth under "Executive Compensation" above with the amount of any bonus to
be determined by the Executive Compensation Committee. Each executive
officer's compensation may be increased in accordance with criteria to be
established by the Executive Compensation Committee. Each employment agreement
will require the executive officer to devote substantially all of such
executive's time to the affairs of the Company. The employment agreements also
will provide for certain severance payments and continued receipt of certain
benefits including medical insurance, life and disability insurance and
participation in all pension, 401(k) and other employee plans and benefits
established by the Company for a specified period of time following the date
of termination. In addition, John B. Kilroy, Jr.'s employment agreement will
contain certain noncompete provisions which will restrict his conduct during
the term of his employment and for one year thereafter, and for so long as he
is a member of the Company's Board of Directors. See "Policies With Respect to
Certain Activities--Conflict of Interest Policies."
 
STOCK INCENTIVE PLAN
 
  The Company has established the Stock Incentive Plan to enable executive
officers, key employees and directors of the Company, the Operating
Partnership and the Services Company to participate in the ownership of the
Company. The Stock Incentive Plan is designed to attract and retain executive
officers, other key employees and directors of the Company, the Operating
Partnership and the Services Company and to provide incentives to such persons
to maximize the Company's cash flow available for distribution. The Stock
Incentive Plan provides for the award to such executive officers and employees
of the Company, the Operating Partnership and the Services Company (subject to
the Ownership Limit, or such other limit as provided in the Company's Articles
of Incorporation or as otherwise permitted by the Board of Directors) of a
broad variety of stock-based compensation alternatives such as nonqualified
stock options, incentive stock options and restricted stock, and provides for
the grant to Independent Directors and directors of the Services Company
(subject to the Ownership Limit, or such other limit as provided in the
Company's Articles of Incorporation or as otherwise permitted by the Board of
Directors) of nonqualified stock options.
 
  The Stock Incentive Plan will be administered by the Executive Compensation
Committee, which is authorized to select from among the eligible employees of
the Company, the Operating Partnership and the Services Company the
individuals to whom options, restricted stock purchase rights and performance
awards are to be granted and to determine the number of shares to be subject
thereto and the terms and conditions thereof.
 
                                      97
<PAGE>
 
The Executive Compensation Committee is also authorized to adopt, amend and
rescind rules relating to the administration of the Stock Incentive Plan.
Nonqualified stock options shall be granted to Independent Directors in
accordance with the formula set forth in the Stock Incentive Plan.
 
 Awards under the Stock Incentive Plan
 
  Nonqualified stock options. Nonqualified stock options will provide for the
right to purchase Common Stock at a specified price which may be less than
fair market value on the date of grant (but not less than par value), and
usually will become exercisable in installments after the grant date.
Nonqualified stock options may be granted for any reasonable term. Option
grants to Independent Directors are limited to automatic awards of
nonqualified options to purchase shares of Common Stock at the fair market
value on the date of grant. See "--Compensation of Directors."
 
  Incentive stock options. Incentive stock options, if granted, will be
designed to comply with the provisions of the Code and will be subject to
restrictions contained in the Code, including exercise prices equal to at
least 100% of fair market value of Common Stock on the grant date and a ten-
year restriction on their term, but may be subsequently modified to disqualify
them from treatment as an incentive stock option.
 
  Restricted stock. Restricted stock may be sold to participants at various
prices (but not below par value) and made subject to such restrictions as may
be determined by the Executive Compensation Committee. Restricted stock,
typically, may be repurchased by the Company at the original purchase price if
the conditions or restrictions are not met. In general, restricted stock may
not be sold, or otherwise transferred or hypothecated, until restrictions are
removed or expire. Purchasers of restricted stock, unlike recipients of
options, will have voting rights and will receive dividends prior to the time
when the restrictions lapse.
 
  Promptly after the closing of the Offering, the Company expects to issue to
certain officers, directors and key employees of the Company, the Operating
Partnership and the Services Company options to purchase, subject to the
Ownership Limit, or such other limit as provided in the Company's Articles of
Incorporation or as otherwise permitted by the Board of Directors, 430,000
shares of Common Stock pursuant to the Stock Incentive Plan. The term of each
of such option will be ten years from the date of grant. Each such option will
vest 25% per year over four years, except that the options granted to the
Independent Directors will vest 33 1/3% per year over three years, and is
exercisable at a price per share equal to the initial public offering price
per share of Common Stock in the Offering. The table below sets forth the
expected allocation of the options to such persons.
 
<TABLE>
<CAPTION>
     NAME                                                                OPTIONS
     ----                                                                -------
     <S>                                                                 <C>
     John B. Kilroy, Sr.................................................
     John B. Kilroy, Jr.................................................
     Independent Directors (as a group).................................
     Other employees (as a group).......................................
</TABLE>
 
  A maximum of 570,000 additional shares of Common Stock will be reserved for
issuance under the Stock Incentive Plan. There is no limit on the number of
awards that may be granted to any one individual so long as the aggregate fair
market value (determined at the time of grant) of shares with respect to which
an incentive stock option is first exercisable by an optionee during any
calendar year cannot exceed $    and the grant does not violate the Ownership
Limit or cause the Company to fail to qualify as a REIT for federal income tax
purposes. See "Description of Capital Stock--Restrictions on Ownership and
Transfer."
 
SECTION 401(K) PLAN
 
  Effective upon the consummation of the Offering, the Company intends to
establish the Company's Section 401(k) Savings/Retirement Plan (the "Section
401(k) Plan") to cover eligible employees of the Company and any designated
affiliate.
 
 
                                      98
<PAGE>
 
  The Section 401(k) Plan will permit eligible employees of the Company to
defer up to 15% of their annual compensation, subject to certain limitations
imposed by the Code. The employees' elective deferrals are immediately vested
and non-forfeitable upon contribution to the Section 401(k) Plan. The Company
currently does not intend to make matching contributions to the Section 401(k)
Plan; however, it reserves the right to make matching contributions or
discretionary profit sharing contributions in the future.
 
INDEMNIFICATION
 
  For a description of the limitation of liability and indemnification rights
of the Company's officers and directors, see "Certain Provisions of Maryland
Law and of the Company's Articles of Incorporation and Bylaws--Limitation of
Directors' and Officers' Liability" and "--Indemnification Agreements."
 
                                      99
<PAGE>
 
                    FORMATION AND STRUCTURE OF THE COMPANY
 
  Kilroy Realty was formed in September 1996 and the Operating Partnership was
formed in October 1996. The Services Company will be formed prior to
consummation of the Offering.
 
FORMATION TRANSACTIONS
 
  Prior to or simultaneous with the consummation of the Offering, the Company,
the Operating Partnership, the Services Company and the Continuing Investors
will engage in certain transactions (the "Formation Transactions") designed to
enable the Company to continue and expand the real estate operations of KI, to
facilitate the Offering, to enable the Company to qualify as a REIT for
federal income tax purposes commencing with its taxable year ending December
31, 1996 and to preserve certain tax advantages for the existing owners of the
Properties. The Formation Transactions are as follows:
 
  .  Pursuant to the Omnibus Agreement, the Operating Partnership may require
     the contribution of all of the Continuing Investors' interests in the
     Properties, as well as certain other assets, other than the Acquisition
     Properties, to the Operating Partnership in exchange for Units
     representing limited partnership interests in the Operating Partnership.
     Following the consummation of the Offering and the Formation
     Transactions, the Units received by the Continuing Investors will
     constitute in the aggregate an approximately 15.2% limited partnership
     interest in the Operating Partnership.
 
  .  John B. Kilroy, Sr. and John B. Kilroy, Jr. will acquire all of the
     voting common stock of the Services Company (representing 5.0% of its
     economic value), and the Operating Partnership will acquire all of the
     non-voting preferred stock of the Services Company (representing 95.0%
     of its economic value).
 
  .  The Company will sell shares of Common Stock in the Offering and
     contribute the net proceeds from the Offering (approximately $169.7
     million) to the Operating Partnership in exchange for an 84.8% general
     partner interest in the Operating Partnership.
 
  .  The Company, through the Operating Partnership will borrow approximately
     $75.0 million principal amount of long-term financing pursuant to the
     Mortgage Loan.
 
  .  The Operating Partnership, will apply the aggregate of the net Offering
     proceeds and the Financing toward the repayment of existing mortgage
     indebtedness on certain of the Properties, the purchase of the
     Acquisition Properties and payment of its expenses arising in connection
     with the Offering and the Financing. See "Use of Proceeds."
 
  .  Certain of the current employees of KI will become employees of the
     Company, the Operating Partnership and the Services Company.
 
  .  The Operating Partnership or the Services Company will enter into
     management agreements with respect to each of the Excluded Properties.
 
  .  Pursuant to the Omnibus Agreement and certain other option agreements,
     the Operating Partnership will be granted options to acquire each of the
     Excluded Properties.
 
  As a result of the foregoing transactions, the Company will own 9,260,000
Units of the Operating Partnership, which will represent an approximately
84.8% economic interest in the Operating Partnership, and the Continuing
Investors will own 1,653,835 Units, which will represent the remaining
approximately 15.2% economic interest in the Operating Partnership. If the
Underwriters' over-allotment option is exercised in full and the net proceeds
from the additional shares of Common Stock sold by the Company are contributed
to the Operating Partnership, the Company's percentage ownership interest in
the Operating Partnership will increase to approximately 86.6%. The Company
will be the sole general partner and retain management control over the
Operating Partnership.
 
  Holders of Units will have the opportunity after two years following the
receipt of such Units to have their Units redeemed by the Operating
Partnership at the request of the Unitholder for cash (based on the fair
market value of an equivalent number of shares of Common Stock at the time of
such redemption) or, at the Company's
 
                                      100
<PAGE>
 
option, it may exchange Units for shares of Common Stock on a one-for-one
basis, subject to certain antidilution adjustments and the obligation of
certain of the Continuing Investors to indemnify the Company in connection
with the Formation Transactions, provided, however, that if the Company does
not elect to exchange such Units for shares of Common Stock, a Unitholder that
is a corporation or limited liability company may require the Company to issue
shares of Common Stock in lieu of cash, subject to the Ownership Limit or such
other limit as provided in the Company's Articles of Incorporation, as
applicable. See "Formation and Structure of the Company--Allocation of
Consideration in the Formation Transactions," Under certain circumstances, the
Units may be redeemed prior to the first anniversary of the consummation of
the Offering in connection with the obligation of certain of the Continuing
Investors to indemnify the Company in connection with the Formation
Transactions. See "--Allocation of Consideration in the Formation
Transactions."
 
  The Continuing Investors are comprised of seven individuals, all of whom are
"accredited investors" as defined in Regulation D under the Securities Act of
1933, as amended, and corporations, partnerships and trusts owned, directly or
indirectly, solely by such individuals. Each such individual is an adult
member of the family of John B. Kilroy, Sr. and/or a long-time officer of KI.
Consent of such persons to the Formation Transactions was received on or
before November 3, 1996 pursuant to a private solicitation thereof in
compliance with Regulation D.
 
REASONS FOR THE REORGANIZATION OF THE COMPANY
 
  The Company believes that the benefits of the Formation Transactions
outweigh the detriments to the Company. The benefits of the Company's REIT
status and structure, as opposed to the status and structure of the
Partnerships, include the following:
 
  .  Access to Capital. The Company's structure will, in the Company's
     judgment, provide it with greater access to capital for refinancing and
     growth. Sources of capital include the Common Stock sold in the Offering
     and possible future issuances of debt or equity through public offerings
     or private placements. The financial strength of the Company should
     enable it to obtain financing at better rates and on better terms than
     would otherwise be available to the Partnerships, some of which are
     single asset entities.
 
  .  Growth of the Company. The Company's structure will allow stockholders,
     including the Continuing Investors through their ownership of Units, an
     opportunity to participate in the growth of the real estate market
     through an ongoing business enterprise. In addition to the existing
     portfolio of Properties, the Company gives stockholders an interest in
     all future development by the Company and in the fee-producing service
     businesses being contributed by the Company to the Services Company.
 
  .  Risk Diversification. The Company's structure provides stockholders a
     diversification of risk and reward not available in single asset
     entities by providing them with an equity interest in a REIT in which
     there has been a pooling together of similar properties and by
     consolidating the operating business and future development projects.
 
  .  Deleveraging. Upon completion of the Offering and the Formation
     Transactions, the Company will have substantially reduced the debt
     encumbering the Properties. This reduction, with a consequent reduction
     in debt service, will increase the aggregate amount of cash available
     for distribution to stockholders. The Formation Transactions also will
     permit the Company to refinance its existing indebtedness at more
     favorable rates.
 
  .  Liquidity. The equity interests in the Partnerships are typically not
     marketable. The Company's structure allows stockholders, including the
     Continuing Investors, the opportunity to liquidate their capital
     investment through the disposition of Common Stock or Units. Holders of
     Units will have the opportunity, no later than one year after receipt,
     to have their Units redeemed by the Operating Partnership for cash equal
     to the value of an equal number of shares of the Company's Common Stock,
     or the Company may elect to exchange such Units, for an equivalent
     number of shares of Common Stock, provided, however, if the Company does
     not elect to exchange such units for shares of Common Stock, a holder of
     Units that is a corporation or limited liability company may require the
     Company to
 
                                      101
<PAGE>
 
     issue Common Stock in lieu thereof, subject to the Ownership Limit or
     such other limit as provided in the Company's Articles of Incorporation,
     as applicable.
 
  .  Public Market Valuation of Real Estate Assets. The Company's structure
     may allow investors to benefit potentially from the current public
     market valuation of REITs, which is favorable in light of the current
     private market valuation of comparable assets.
 
  .  Tax Deferral. The Formation Transactions provide to the members of the
     Continuing Investors the opportunity to defer the tax consequences that
     would arise from a sale or contribution of their interests in the
     Properties and other assets to the Company.
 
  The detriments of the Company's REIT status and structure as opposed to the
status and structure of the Partnerships include the following (see also "Risk
Factors"):
 
  .  Conflicts of Interest. Management of the Company will be subject to a
     number of conflicts of interest in the operation of the Operating
     Partnership as well as the formation of the Company. Among other
     conflicts, there will be no independent valuation or appraisal of the
     Properties, and no arm's-length negotiation of the terms of the option
     agreements relating to the Excluded Properties, and there can be no
     assurance that the value given to the Continuing Investors by the
     Company for such assets is equal to their fair market value. Because
     certain Continuing Investors will be directors or officers of the
     Company, they will have a conflict of interest with respect to enforcing
     the agreements transferring their interest in certain assets to the
     Company. In addition, because the Continuing Investors and officers of
     the Company may suffer different tax consequences than the Company upon
     the sale or refinancing of any of the Properties, their interests
     regarding the timing and pricing of such sale or refinancing may
     conflict with those of the Company.
 
  .  Loss of Individual Asset Growth Opportunity. Any given asset may over
     time outperform the Common Stock. Any investor who exchanges an interest
     in a single asset for a smaller interest in a group of assets will
     receive a lower return on investment if the asset from which the
     investor traded outperforms the Common Stock.
 
  .  No Anticipated Distributions from Asset Sales. Unlike the Partnerships,
     in which the net proceeds from the sale of assets were generally
     distributed to the partners, the Company is not expected to have
     significant asset sales. Moreover, the Company may decide to reinvest
     the proceeds from asset sales rather than distribute them to
     stockholders. Although stockholders will have the ability to sell their
     shares of Common Stock (subject to certain restrictions discussed
     herein), they would not be able to rely upon the mere passage of time to
     realize their share of the gains, if any, that might be recognized at
     any point in time from a liquidation of all or part of the assets of the
     Company.
 
  .  Public Market Valuation. Although the Company has been advised that the
     public market currently values real estate assets on a basis that is
     attractive in relation to private market real estate values, there is no
     assurance that this will be a permanent condition. In the 1980s, REIT
     shares generally traded at a discount to the underlying private market
     values of the REIT properties, rather than at a premium. This condition
     could return. In addition, an increase in interest rates could adversely
     affect the market value of the shares of Common Stock.
 
  .  Costs of the Transaction. The aggregate expenses of the Offering,
     including the underwriting discount, are expected to be approximately
     $15.5 million, assuming gross proceeds of the Offering of approximately
     $185.2 million. In addition, the Operating Partnership will incur costs
     of approximately $1.5 million in the aggregate in connection with the
     Financing.
 
  .  Costs of Operating Public Company. The Company expects to incur expenses
     in connection with the requirements of being a public company, including
     without limitation, preparation of financial statements and proxies,
     printing and filing costs and fees paid to the Company's certified
     public accountants.
 
                                      102
<PAGE>
 
COMPARISON OF COMMON STOCK AND UNITS
 
  Conducting the Company's operations through the Operating Partnership allows
the Continuing Investors to defer certain tax consequences by contributing
their interests in Properties to the Operating Partnership and also offers
favorable methods of accessing capital markets. Units in the Operating
Partnership will be held by the Continuing Investors and the Company. Each
Unit was designed to result in a distribution per Unit equal to a distribution
per share of Common Stock (assuming the Company distributes to its
shareholders all amounts it receives as distribution from the Operating
Partnership). Beginning one year following the consummation of the Offering,
each Unit issued in the Formation Transactions is redeemable by the Operating
Partnership at the request of the Unitholder for cash payable by the Operating
Partnership or, at the Company's option, the Company may exchange Units for
Common Stock on a one-for-one basis (subject to certain antidilution
adjustments and certain limitations on exchange to preserve the Company's
status as a REIT), provided, however, that if the Operating Partnership elects
to redeem such Units for cash, a Unitholder that is a corporation or a limited
liability company may require the Company to issue shares of Common Stock in
lieu of cash. There are, however, certain differences between the ownership of
Common Stock and Units, including:
 
  .  Voting Rights. Holders of Common Stock may elect the Board of Directors
     of the Company, which, as the general partner of the Operating
     Partnership, controls the business of the Operating Partnership.
     Unitholders may not elect directors of the Company.
 
  .  Transferability. The shares of Common Stock sold in the Offering will be
     freely transferable under the Securities Act by holders who are not
     affiliates of the Company or the Underwriters. The Units and the shares
     of Common Stock into which they are exchangeable are subject to transfer
     restrictions under applicable securities laws and under the Partnership
     Agreement, including the required consent of the general partner to the
     admission of any new limited partner, and the Units of certain
     Continuing Investors will be pledged to secure certain indemnity
     obligations. See "Shares Available for Future Sale" for a description of
     the Registration Rights Agreement applicable to holders of Units.
 
  .  Distributions. Because the relative tax basis of the contributions by
     the public investors and the Continuing Investors are expected to be
     different, it is possible that the public investors' distribution will
     include a return of capital that exceeds that of the Continuing
     Investors. See "Federal Income Tax Consequences."
 
ADVANTAGES AND DISADVANTAGES OF THE FORMATION TRANSACTIONS TO UNAFFILIATED
STOCKHOLDERS
 
  The potential advantages of the Formation Transactions to unaffiliated
stockholders of the Company include their ability to participate in the cash
flow of the Properties through their ownership in the Company and in all
future office and industrial property acquisitions and development by the
Company. The potential disadvantages of such transactions to unaffiliated
stockholders of the Company may be several, including the impact of shares
available for future sale and substantial and immediate dilution in the
tangible book value per share, and the lack of arm's-length negotiations to
determine the terms of the transfers of the Properties to the Company and the
Operating Partnership and the terms of the option agreements relating to the
Excluded Properties. See the discussion of such matters under "Risk Factors."
 
                                      103
<PAGE>
 
BENEFITS OF THE FORMATION TRANSACTIONS TO THE CONTINUING INVESTORS
 
  The principals of KI proposed the Formation Transactions to the Continuing
Investors because they believe that the benefits of the organization of the
Company for the Continuing Investors outweigh the detriments to them. Benefits
to members of the Continuing Investors include:
 
  .  improved liquidity of their interests in the Properties, increased
     diversification of investment and deferral of a portion the tax
     consequences of the contribution of their interests in the Properties to
     the Operating Partnership;
 
  .  repayment of indebtedness in the aggregate net amount of approximately
     $204.7 million resulting from the refinancing of existing mortgage
     indebtedness, approximately $34.8 million of which was guaranteed by
     certain members of the Kilroy Group, and including the repayment of
     approximately $3.4 million personal indebtedness of a Continuing
     Investor; and
 
  .  employment agreements between the Company and John B. Kilroy, Jr.
     providing annual salary, incentive compensation (including options) and
     other benefits for his services as an officer of the Company. See
     "Management--Employment Agreements."
 
ALLOCATION OF CONSIDERATION IN THE FORMATION TRANSACTIONS
 
  No independent valuations or appraisals of the Properties were obtained in
connection with the Formation Transactions. The allocation of Units among the
Kilroy Group was based primarily on the relative contributions to net
operating income and other factors relating to the value of the Company as an
on-going enterprise, and generally was not determined through arm's-length
negotiations. There can be no assurance that the fair market value of the
Properties transferred to the Company will equal the sum of the value of the
Units issued to the Kilroy Group.
 
  Certain Continuing Investors (the "Indemnitors") have agreed pursuant to a
supplemental representations, warranties and indemnity agreement, a form of
which has been filed as an exhibit to the Registration Statement of which this
Prospectus is a part, to make certain representations and warranties
concerning the Properties, and have also agreed to indemnify the Company
against breaches of such representations and warranties. These representations
and warranties will survive the closing of the Offering until June 1998 and
the related indemnification obligations will be joint and several among the
Indemnitors. The Units received by these Continuing Investors in the Formation
Transactions will be pledged to secure their indemnification obligations under
the agreement.
 
                                      104
<PAGE>
 
                CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
 
  Certain directors and executive officers of the Company (or members of their
immediate families) and persons who will hold more than 5% of the outstanding
shares of Common Stock (or interests exchangeable therefor) have direct or
indirect interests in transactions which have been or will be consummated by
the Company, the Operating Partnership or the Services Company, including the
transfer of certain Properties to the Operating Partnership by the Continuing
Investors, the grant of options with respect to the Excluded Properties and,
if exercised, the purchase by the Company of one or more of the Excluded
Properties from the respective Continuing Investors, the repayment of certain
indebtedness encumbering the Properties and the performance of management and
leasing activities by the Operating Partnership and certain development and
other activities by the Services Company at the Excluded Properties. See
"Formation Transactions." In addition, John B. Kilroy, Sr. has contributed
$1,000 to the Company in exchange for an aggregate of 50 shares of Common
Stock, and upon consummation of the Offering, John B. Kilroy, Jr. and John B.
Kilroy, Sr. each will have contributed equity to the Services Company, which,
upon consummation of the Offering and the Formation Transactions, will
represent a 5.0% economic interest in the Services Company.
 
PARTNERSHIP AGREEMENT
 
  Concurrently with the completion of the Offering, the Company will enter
into the Partnership Agreement of the Operating Partnership with the various
limited partners of the Operating Partnership. See "Partnership Agreement of
Operating Partnership." Certain of the limited partners of the Operating
Partnership are directors and/or officers of the Company and the Services
Company.
 
ASSIGNMENT OF LEASE; VARIOUS SERVICES PROVIDED BY THE SERVICES COMPANY TO THE
KILROY GROUP
 
  Concurrently with the completion of the Offering, KI will assign to the
Services Company all of its interest as a tenant in a lease with a partnership
affiliated with the Continuing Investors covering the space currently serving
as the headquarters of KI at Kilroy LAX in El Segundo, California. The
Company, the Operating Partnership and the Services Company will occupy such
space, with the Company and the Operating Partnership subleasing some of such
space from the Services Company and paying rent to the Services Company
therefor, at rates which the Company believes are equal to the fair rental
value of the space.
 
  Pursuant to management agreements, the Operating Partnership will provide
management and leasing services, and the Services Company will provide
development services, with respect to the Excluded Properties, each of which
is owned in whole or in part by certain executive officers and directors, for
fees equivalent to the fair market value of such services. See "Business and
Properties--Development, Management and Leasing--Excluded Properties."
 
BENEFITS OF THE FORMATION TRANSACTIONS TO CERTAIN EXECUTIVE OFFICERS
 
  Certain of the Company's executive officers are Continuing Investors and
will receive Units and/or repayment of loans and related guarantees in
connection with consummation of the Formation Transactions. Certain of the
executive officers also hold interests in one or more affiliates of the Kilroy
Group which, upon the exercise of certain options by the Company, may transfer
property to the Operating Partnership in exchange for cash or Units. In the
event that the Independent Directors determine to cause the Company to
exercise its options to purchase these properties, the executive officers may
receive a portion of the consideration paid therefor. See "Business and
Properties--Development, Management and Leasing--Excluded Properties."
 
                                      105
<PAGE>
 
                            PRINCIPAL STOCKHOLDERS
 
  The following table sets forth the beneficial ownership of shares of Common
Stock immediately following the consummation of the Offering and the Formation
Transactions for (i) each person who is expected to be the beneficial owner of
5% or more of the outstanding Common Stock immediately following the
consummation of the Offering, (ii) directors, proposed directors and certain
executive officers of the Company, and (iii) directors, proposed directors and
executive officers of the Company as a group. None of the persons or entities
listed below currently owns any shares of Common Stock, but rather owns Units
exchangeable for shares of Common Stock. See "Partnership Agreement of the
Operating Partnership--Redemption/Exchange Rights." This table assumes that
(i) the Formation Transactions and the Offering are completed and (ii) the
Underwriters' over-allotment option will not be exercised. Each person named
in the table has sole voting and investment power with respect to all of the
shares of Common Stock shown as beneficially owned by such person, except as
otherwise set forth in the notes to the table. This table reflects the
ownership interests each of the following persons would have if each person
exchanged all of his Units for shares of Common Stock at an initial exchange
ratio of one Unit for each share of Common Stock (without regard to the
Ownership Limit and the prohibition on redemption or exchange of Units until
two years after the date of the Offering). See "Partnership Agreement of the
Operating Partnership--Redemption/Exchange Rights." Unless otherwise
indicated, the address of each named person is c/o Kilroy Realty Corporation,
2250 East Imperial Highway, Suite 1200, El Segundo, California 90245.
 
<TABLE>
<CAPTION>
                                                              PERCENTAGE OF
                                        NUMBER OF SHARES    OUTSTANDING SHARES
   NAME OF BENEFICIAL OWNER           BENEFICIALLY OWNED(1)  OF COMMON STOCK
   ------------------------           --------------------- ------------------
   <S>                                <C>                   <C>
   John B. Kilroy, Sr................             (2)
   John B. Kilroy, Jr................             (2)
   Directors and executive officers
    as a group (  persons)...........
</TABLE>
- --------
(1) Excludes options to purchase 430,000 shares of Common Stock granted to
    executive officers and directors at the consummation of the Offering.
(2) These Units have been pledged to secure certain indemnification
    obligations to the Company arising in connection with the Formation
    Transactions. See "Certain Relationships and Related Transactions."
 
                                      106
<PAGE>
 
                         DESCRIPTION OF CAPITAL STOCK
 
  The following summary of the terms of the Company's capital stock does not
purport to be complete and is subject to and qualified in its entirety by
reference to the Company's Articles of Incorporation and Bylaws, copies of
which are attached as exhibits to the Registration Statement of which this
Prospectus is a part. See "Additional Information."
 
GENERAL
 
  Under the Articles of Incorporation, the authorized capital stock of the
Company consists of 150,000,000 shares of Common Stock, par value $.01 per
share, and 30,000,000 shares of preferred stock, par value $.01 per share
("Preferred Stock"). Upon completion of the Offering and Formation
Transactions, there will be 9,260,000 shares of Common Stock issued and
outstanding (10,649,000 shares if the Underwriters' over-allotment option is
exercised in full), excluding shares that may be issued upon the exchange of
outstanding Units, and no shares of Preferred Stock will be issued and
outstanding.
 
COMMON STOCK
 
  Each outstanding share of Common Stock will entitle the holder to one vote
on all matters presented to stockholders for a vote, including the election of
directors, and, except as otherwise required by law and except as provided in
any resolution adopted by the Board of Directors with respect to any other
class or series of stock establishing the designation, powers, preferences and
relative, participating, optional or other special rights and powers of such
series, the holders of such shares will possess the exclusive voting power,
subject to the provisions of the Company's Articles of Incorporation regarding
the ownership of shares of Common Stock in excess of the Ownership Limit, or
such other limit as provided in the Company's Articles of Incorporation or as
otherwise permitted by the Board of Directors described below. Holders of
shares of Common Stock will have no conversion, exchange, sinking fund,
redemption or appraisal rights and have no preemptive rights to subscribe for
any securities of the Company or cumulative voting rights in the election of
directors. All shares of Common Stock to be issued and outstanding following
the consummation of the Offering will be duly authorized, fully paid and
nonassessable. Subject to the preferential rights of any other shares or
series of stock and to the provisions of the Articles of Incorporation
regarding ownership of shares of Common Stock in excess of the Ownership
Limit, or such other limit as provided in the Company's Articles of
Incorporation or as otherwise permitted by the Board of Directors described
below, distributions may be paid to the holders of shares of Common Stock if
and when authorized and declared by the Board of Directors of the Company out
of funds legally available therefor. The Company intends to make quarterly
distributions, beginning with distributions for the portion of the quarter
from the consummation of the Offering through       , 1997. See "Distribution
Policy."
 
  Under Maryland law, stockholders are generally not liable for the Company's
debts or obligations. If the Company is liquidated, subject to the right of
any holders of Preferred Stock to receive preferential distributions, each
outstanding share of Common Stock will be entitled to participate pro rata in
the assets remaining after payment of, or adequate provision for, all known
debts and liabilities of the Company, including debts and liabilities arising
out of its status as general partner of the Operating Partnership.
 
  Subject to the provisions of the Articles of Incorporation regarding the
ownership of shares of Common Stock in excess of the Ownership Limit, or such
other limit as provided in the Company's Articles of Incorporation or as
otherwise permitted by the Board of Directors described below, all shares of
Common Stock will have equal distribution, liquidation and voting rights, and
will have no preference or exchange rights. See "--Restrictions on Ownership
and Transfer."
 
  Under the MGCL, a Maryland corporation generally cannot dissolve, amend its
charter, merge, sell all or substantially all of its assets, engage in a share
exchange or engage in similar transactions outside the ordinary course of
business unless approved by the affirmative vote of stockholders holding at
least two-thirds of the
 
                                      107
<PAGE>
 
shares entitled to vote on the matter unless a lesser percentage (but not less
than a majority of all of the votes entitled to be cast on the matter) is set
forth in the corporation's charter. The Articles of Incorporation of the
Company do not provide for a lesser percentage in any such situation.
 
  The Articles of Incorporation authorize the Board of Directors to reclassify
any unissued shares of Common Stock into other classes or series of classes of
stock and to establish the number of shares in each class or series and to set
the preferences, conversion and other rights, voting powers, restrictions,
limitations and restrictions on ownership, limitations as to dividends or
other distributions, qualifications and terms or conditions of redemption for
each such class or series.
 
TRANSFER AGENT AND REGISTRAR
 
  The transfer agent and registrar for the Common Stock will be        .
 
PREFERRED STOCK
 
  Preferred Stock may be issued from time to time, in one or more series, as
authorized by the Board of Directors. No Preferred Stock is currently issued
or outstanding. Prior to the issuance of shares of each series, the Board of
Directors is required by the MGCL and the Company's Articles of Incorporation
to fix for each series the terms, preferences, conversion or other rights,
voting powers, restrictions, limitations as to distributions, qualifications
and terms or conditions of redemption, as permitted by Maryland law. Because
the Board of Directors has the power to establish the preferences, powers and
rights of each series of Preferred Stock, it may afford the holders of any
series of Preferred Stock preferences, powers and rights, voting or otherwise,
senior to the rights of holders of shares of Common Stock. The issuance of
Preferred Stock could have the effect of delaying or preventing a change of
control of the Company that might involve a premium price for holders of
Common Stock or otherwise be in their best interest. The Board of Directors
has no present plans to issue any Preferred Stock.
 
RESTRICTIONS ON OWNERSHIP AND TRANSFER
 
  Ownership Limits. For the Company to qualify as a REIT under the Code, no
more than 50% in value of its outstanding shares of stock may be owned,
actually or constructively, by five or fewer individuals (as defined in the
Code to include certain entities) during the last half of a taxable year
(other than the first year for which an election to be treated as a REIT has
been made). In addition, if the Company, or an owner of 10% or more of the
Company, actually or constructively owns 10% or more of a tenant of the
Company (or a tenant of any partnership in which the Company is a partner),
the rent received by the Company (either directly or through any such
partnership) from such tenant will not be qualifying income for purposes of
the REIT gross income tests of the Code. A REIT's stock must also be
beneficially owned by 100 or more persons during at least 335 days of a
taxable year of twelve months or during a proportionate part of a shorter
taxable year (other than the first year for which an election to be treated as
a REIT has been made).
 
  Because the Company expects to qualify as a REIT, the Articles of
Incorporation contain restrictions on the ownership and transfer of Common
Stock which are intended to assist the Company in complying with these
requirements. The Ownership Limit set forth in the Company's Articles of
Incorporation provides that, subject to certain specified exceptions, no
person or entity may own, or be deemed to own by virtue of the applicable
constructive ownership provisions of the Code, more than 8.0% (by number or
value, whichever is more restrictive) of the outstanding shares of Common
Stock. The constructive ownership rules are complex, and may cause shares of
Common Stock owned actually or constructively by a group of related
individuals and/or entities to be constructively owned by one individual or
entity. As a result, the acquisition of less than 8.0% of the shares of Common
Stock (or the acquisition of an interest in an entity that owns, actually or
constructively, Common Stock) by an individual or entity, could, nevertheless
cause that individual or entity, or another individual or entity, to own
constructively in excess of 8.0% of the outstanding Common Stock and thus
violate the Ownership Limit, or such other limit as provided in the Company's
Articles of Incorporation or as otherwise permitted by the Board of Directors.
The Board of Directors may, but in no event will be required to, waive the
Ownership
 
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Limit with respect to a particular stockholder if it determines that such
ownership will not jeopardize the Company's status as a REIT and the Board of
Directors otherwise decides such action would be in the best interest of the
Company. As a condition of such waiver, the Board of Directors may require
opinions of counsel satisfactory to it and/or undertakings or representations
from the applicant with respect to preserving the REIT status of the Company.
The Board of Directors has obtained such undertakings and representations from
John B. Kilroy, Sr., John B. Kilroy, Jr., members of their families and
certain affiliated entities and, as a result, has waived the Ownership Limit
with respect to such individuals and entities. John B. Kilroy, Sr.,
John B. Kilroy, Jr., members of their families and certain affiliated entities
(including the Operating Partnership) will be permitted to own, in the
aggregate, actually or constructively, up to 17% (by number of shares or
value, whichever is more restrictive) of the outstanding Common Stock.
 
  The Company's Articles of Incorporation further prohibits (i) any person
from actually or constructively owning shares of stock of the Company that
would result in the Company being "closely held" under Section 856(h) of the
Code or otherwise cause the Company to fail to qualify as a REIT, and (ii) any
person from transferring shares of stock of the Company if such transfer would
result in shares of stock of the Company being owned by fewer than 100
persons. Any person who acquires or attempts or intends to acquire actual or
constructive ownership of shares of stock of the Company that will or may
violate any of the foregoing restrictions on transferability and ownership is
required to give notice immediately to the Company and provide the Company
with such other information as the Company may request in order to determine
the effect of such transfer on the Company's status as a REIT. The foregoing
restrictions on transferability and ownership will not apply if the Board of
Directors determines that it is no longer in the best interest of the Company
to attempt to qualify, or to continue to qualify, as a REIT. Except as
otherwise described above, any change in the Ownership Limit would require an
amendment to the Articles of Incorporation. Amendments to the Articles of
Incorporation require the affirmative vote of holders owning 66 2/3% of the
outstanding Common Stock.
 
  Pursuant to the Articles of Incorporation, if any purported transfer of
Common Stock of the Company or any other event would otherwise result in any
person violating the Ownership Limit or such other limit as provided in the
Company's Articles of Incorporation or as otherwise permitted by the Board of
Directors, then any such purported transfer will be void and of no force or
effect with respect to the purported transferee (the "Prohibited Transferee")
as to that number of shares in excess of the Ownership Limit or such other
limit, and the Prohibited Transferee shall acquire no right or interest (or,
in the case of any event other than a purported transfer, the person or entity
holding record title to any such excess shares (the "Prohibited Owner") shall
cease to own any right or interest) in such excess shares. Any such excess
shares described above will be transferred automatically, by operation of law,
to a trust, the beneficiary of which will be a qualified charitable
organization selected by the Company (the "Beneficiary"). Such automatic
transfer shall be deemed to be effective as of the close of business on the
business day prior to the date of such violative transfer. Within 20 days of
receiving notice from the Company of the transfer of shares to the trust, the
trustee of the trust (who shall be designated by the Company and be
unaffiliated with the Company and any Prohibited Transferee or Prohibited
Owner) will be required to sell such excess shares to a person or entity who
could own such shares without violating the Ownership Limit, or such other
limit as provided in the Company's Articles of Incorporation or as otherwise
permitted by the Board of Directors, and distribute to the Prohibited
Transferee or Prohibited Owner an amount equal to the lesser of the price paid
by the Prohibited Transferee or Prohibited Owner for such excess shares or the
sales proceeds received by the trust for such excess shares. In the case of
any excess shares resulting from any event other than a transfer, or from a
transfer for no consideration (such as a gift), the trustee will be required
to sell such excess shares to a qualified person or entity and distribute to
the Prohibited Owner an amount equal to the lesser of the fair market value of
such excess shares as of the date of such event or the sales proceeds received
by the trust for such excess shares. In either case, any proceeds in excess of
the amount distributable to the Prohibited Transferee or Prohibited Owner, as
applicable, will be distributed to the Beneficiary. Prior to a sale of any
such excess shares by the trust, the trustee will be entitled to receive, in
trust for the Beneficiary, all dividends and other distributions paid by the
Company with respect to such excess shares, and also will be entitled to
exercise all voting rights with respect to such excess shares. Subject to
Maryland law, effective as of the date that such shares have been transferred
to the trust, the trustee shall have the authority (at the trustee's
 
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<PAGE>
 
sole discretion) (i) to rescind as void any vote cast by a Prohibited
Transferee or Prohibited Owner, as applicable, prior to the discovery by the
Company that such shares have been transferred to the trust and (ii) to recast
such vote in accordance with the desires of the trustee acting for the benefit
of the Beneficiary. However, if the Company has already taken irreversible
corporate action, then the trustee shall not have the authority to rescind and
recast such vote. Any dividend or other distribution paid to the Prohibited
Transferee or Prohibited Owner (prior to the discovery by the Company that
such shares had been automatically transferred to a trust as described above)
will be required to be repaid to the trustee upon demand for distribution to
the Beneficiary. In the event that the transfer to the trust as described
above is not automatically effective (for any reason) to prevent violation of
the Ownership Limit or such other limit as provided in the Company's Articles
of Incorporation or as otherwise permitted by the Board of Directors, then the
Articles of Incorporation provide that the transfer of the excess shares will
be void.
 
  In addition, shares of stock of the Company held in the trust shall be
deemed to have been offered for sale to the Company, or its designee, at a
price per share equal to the lesser of (i) the price per share in the
transaction that resulted in such transfer to the trust (or, in the case of a
devise or gift, the Market Price (as defined in the Company's Articles of
Incorporation) at the time of such devise or gift) and (ii) the Market Price
on the date the Company, or its designee, accepts such offer. The Company
shall have the right to accept such offer until the trustee has sold the
shares of stock held in the trust. Upon such a sale to the Company, the
interest of the Beneficiary in the shares sold shall terminate and the trustee
shall distribute the net proceeds of the sale to the Prohibited Transferee or
Prohibited Owner.
 
  If any purported transfer of shares of Common Stock would cause the Company
to be beneficially owned by fewer than 100 persons, such transfer will be null
and void in its entirety and the intended transferee will acquire no rights to
the stock.
 
  All certificates representing shares of Common Stock will bear a legend
referring to the restrictions described above. The foregoing ownership
limitations could delay, defer or prevent a transaction or a change in control
of the Company that might involve a premium price for the Common Stock or
otherwise be in the best interest of stockholders.
 
  Under the Articles of Incorporation, every owner of a specified percentage
(or more) of the outstanding shares of Common Stock must file a completed
questionnaire with the Company containing information regarding their
ownership of such shares, as set forth in the Treasury Regulations. Under
current Treasury Regulations, the percentage will be set between 0.5% and
5.0%, depending upon the number of record holders of the Company's shares. In
addition, each stockholder shall upon demand be required to disclose to the
Company in writing such information as the Company may request in order to
determine the effect, if any, of such stockholder's actual and constructive
ownership of Common Stock on the Company's status as a REIT and to ensure
compliance with the Ownership Limit, or such other limit as provided in the
Company's Articles of Incorporation or as otherwise permitted by the Board of
Directors.
 
                   CERTAIN PROVISIONS OF MARYLAND LAW AND OF
              THE COMPANY'S ARTICLES OF INCORPORATION AND BYLAWS
 
  The following paragraphs summarize certain provisions of the MGCL and the
Company's Articles of Incorporation and Bylaws. The summary does not purport
to be complete and is subject to and qualified in its entirety by reference to
the MGCL and the Company's Articles of Incorporation and Bylaws, copies of
which are exhibits to the Registration Statement of which this Prospectus is a
part.
 
BOARD OF DIRECTORS
 
  The Company's Articles of Incorporation provide that the number of directors
of the Company shall be established by the Bylaws but shall not be less than
the minimum number required by the MGCL, which in the
 
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case of the Company is three. The Bylaws currently provide that the Board of
Directors will consist of not fewer than three nor more than 13 members. Any
vacancy will be filled, at any regular meeting or at any special meeting
called for that purpose, by a majority of the remaining directors or, in the
case of a vacancy resulting from an increase in the number of directors, by a
majority of the entire Board of Directors. The Bylaws provide that a majority
of the Board must be "Independent Directors." An "Independent Director" is a
director who is not an employee or officer of the Company or a subsidiary or
division thereof, or a relative of a principal executive officer, or who is
not an individual member of an organization acting as advisor, consultant or
legal counsel receiving compensation on a continuing basis from the Company in
addition to director's fees.
 
  Pursuant to the Articles of Incorporation, the directors are divided into
three classes as nearly equal in size as practicable. One class will hold
office initially for a term expiring at the annual meeting of stockholders to
be held in 1997, another class will hold office initially for a term expiring
at the annual meeting of stockholders to be held in 1998 and another class
will hold office initially for a term expiring at the annual meeting of
stockholders to be held in 1999. As the term of each class expires, directors
in that class will be elected for a term of three years and until their
successors are duly elected and qualified and the directors in the other two
classes will continue in office. The Company believes that classification of
the Board of Directors will help to assure the continuity and stability of the
Company's business strategies and policies as determined by the Board of
Directors.
 
  The classified director provision could have the effect of making the
removal of incumbent directors more time consuming and difficult, which could
discourage a third party from making a tender offer or otherwise attempting to
obtain control of the Company, even though such an attempt might be beneficial
to the Company and its stockholders. At least two annual meetings of
stockholders, instead of one, will generally be required to effect a change in
a majority of the Board of Directors. Thus, the classified board provision
could increase the likelihood that incumbent directors will retain their
positions. Holders of shares of Common Stock will have no right to cumulative
voting for the election of directors. Consequently, at each annual meeting of
stockholders, the holders of a majority of the shares of Common Stock will be
able to elect all of the successors of the class of directors whose term
expires at that meeting.
 
REMOVAL OF DIRECTORS
 
  The Company's Articles of Incorporation provide that a director may be
removed only for cause and only by the affirmative vote of at least two-thirds
of the votes entitled to be cast in the election of directors. This provision,
when coupled with the provision in the Bylaws authorizing the Board of
Directors to fill vacant directorships, precludes stockholders from removing
incumbent directors except upon a substantial affirmative vote and filling the
vacancies created by such removal with their own nominees.
 
BUSINESS COMBINATIONS
 
  Under the MGCL, certain "business combinations" (including a merger,
consolidation, share exchange, or, in certain circumstances, an asset transfer
or issuance or reclassification of equity securities) between the Company and
any person who beneficially owns, directly or indirectly, 10% or more of the
voting power of the Company's shares, or an affiliate of the Company who, at
any time within the two-year period prior to the date in question, was the
beneficial owner of 10% or more of the voting power of the Company's then
outstanding shares (an "Interested Stockholder") or an affiliate thereof are
prohibited for five years after the most recent date on which the Interested
Stockholder became an Interested Stockholder. Thereafter, any such business
combination must be recommended by the Board of Directors and approved by the
affirmative vote of at least (i) 80% of the votes entitled to be cast by
holders of outstanding shares of the Company's voting stock and (ii) two-
thirds of the votes entitled to be cast by holders of outstanding shares of
the Company's voting stock other than shares held by the Interested
Stockholder with whom the business combination is to be effected, unless,
among other things, the Company's stockholders receive a minimum price (as
defined in the MGCL) for their shares of stock and the consideration is
received in cash or in the same form as previously paid by the Interested
Stockholder for its shares. These provisions of the MGCL do not apply,
however, to business
 
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<PAGE>
 
combinations that are approved or exempted by the Board of Directors prior to
the time that the Interested Stockholder becomes an Interested Stockholder. An
amendment to a Maryland corporation's charter electing not to be subject to
the foregoing requirements must be approved by the affirmative vote of at
least 80% of the votes entitled to be cast by all holders of outstanding
voting shares and two-thirds of the votes entitled to be cast by holders of
outstanding voting shares who are not Interested Stockholders. Any such
amendment is not effective until 18 months after the vote of stockholders and
does not apply to any business combination of a corporation with a stockholder
who was an Interested Stockholder on the date of the stockholder vote.
 
  The Company has exempted from these provisions of the MGCL any business
combination involving the members of the Kilroy Group and their affiliates and
associates, present or future, or any other person acting in concert or as a
group with any of the foregoing persons. As a result, the members of the
Kilroy Group, any present or future affiliate or associate thereof or any
other person acting in concert or as a group with any of the foregoing persons
may be able to enter into business combinations with the Company, which may or
may not be in the best interest of the stockholders.
 
CONTROL SHARE ACQUISITIONS
 
  The MGCL provides that "control shares" of the Company acquired in a
"control share acquisition" have no voting rights except to the extent
approved by a vote of two-thirds of the votes entitled to be cast on the
matter, excluding shares owned by the acquiror or by officers or directors who
are employees of the Company. "Control shares" are voting shares of stock
which, if aggregated with all other such shares of stock previously acquired
by the acquiror, or in respect of which the acquiror is able to exercise or
direct the exercise of voting power (except solely by revocable proxy), would
entitle the acquiror to exercise voting power in electing directors within one
of the following ranges of voting power: (i) one-fifth or more but less than
one-third; (ii) one-third or more but less than a majority; or (iii) a
majority of all voting power. "Control shares" do not include shares of stock
the acquiring person is then entitled to vote as a result of having previously
obtained stockholder approval. A "control share acquisition" means the
acquisition of control shares, subject to certain exceptions.
 
  A person who has made or proposes to make a control share acquisition, upon
satisfaction of certain conditions (including an undertaking to pay expenses),
may compel the Board of Directors to call a special meeting of stockholders to
be held within 50 days of demand to consider voting rights for the shares. If
no request for a meeting is made, the Company may itself present the question
at any stockholders' meeting.
 
  If voting rights are not approved at the stockholders' meeting or if the
acquiring person does not deliver an acquiring person statement as required by
the MGCL, then, subject to certain conditions and limitations, the Company may
redeem any or all of the control shares (except those for which voting rights
have previously been approved) for fair value determined, without regard to
the absence of voting rights for the control shares, as of the date of the
last control share acquisition by the acquiror or of any meeting of
stockholders at which the voting rights of such shares are considered and not
approved. If voting rights for control shares are approved at a stockholders'
meeting and the acquiror becomes entitled to vote a majority of the shares of
stock entitled to vote, all other stockholders may exercise appraisal rights.
The fair value of the shares of stock as determined for purposes of such
appraisal rights may not be less than the highest price per share paid by the
acquiror in the control share acquisition, and certain limitations and
restrictions otherwise applicable to the exercise of dissenters' rights do not
apply in the context of a control share acquisition.
 
  The control share acquisition statute does not apply to shares acquired in a
merger, consolidation or share exchange if the Company is a party to the
transaction, or to acquisitions approved or exempted by the Company's Articles
of Incorporation or Bylaws. Pursuant to the MGCL, the Company has exempted
control share acquisitions involving any member of the Kilroy Group and its
affiliates and associates. As a result, any members of the Kilroy Group and
its affiliates and associates may be able to effect a control share
acquisition of the Company, which may or may not be in the best interest of
the stockholders.
 
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<PAGE>
 
AMENDMENT TO THE ARTICLES OF INCORPORATION AND BYLAWS
 
  The Company's Articles of Incorporation may not be amended without the
affirmative vote of at least two-thirds of the shares of capital stock
outstanding and entitled to vote thereon voting together as a single class.
The Company's Bylaws may be amended by the vote of one more than the majority
of the Board of Directors.
 
MEETINGS OF STOCKHOLDERS
 
  The Company's Bylaws provide for annual meetings of stockholders, commencing
with the year 1997, to elect the Board of Directors and transact such other
business as may properly be brought before the meeting. Special meetings of
stockholders may be called by the President, the Board of Directors or the
Chairman of the Board and shall be called at the request in writing of the
holders of 25% or more of the outstanding stock of the Company entitled to
vote.
 
  The MGCL provides that any action required or permitted to be taken at a
meeting of stockholders may be taken without a meeting by unanimous written
consent, if such consent sets forth such action and is signed by each
stockholder entitled to vote on the matter and a written waiver of any right
to dissent is signed by each stockholder entitled to notice of the meeting but
not entitled to vote at it.
 
ADVANCE NOTICE OF DIRECTOR NOMINATIONS AND NEW BUSINESS
 
  The Company's Bylaws provide that (i) with respect to an annual meeting of
stockholders, nominations of persons for election to the Board of Directors
and the proposal of business to be considered by stockholders may be made only
(a) pursuant to the Company's notice of the meeting, (b) by or at the
direction of the Board of Directors or (c) by a stockholder who is entitled to
vote at the meeting and has complied with the advance notice procedures set
forth in the Bylaws, and (ii) with respect to special meetings of
stockholders, only the business specified in the Company's notice of meeting
may be brought before the meeting of stockholders and where the Company's
notice of the meeting specifies that directors are to be elected at such
special meeting, nominations of persons for election to the Board of Directors
may be made only (x) by or at the direction of the Board of Directors or (y)
provided that the Board of Directors has determined that directors shall be
elected at such meeting, by a stockholder who is entitled to vote at the
meeting and has complied with the advance notice provisions set forth in the
Bylaws.
 
  The provisions in the Company's Articles of Incorporation on classification
of the Board of Directors, amendments to the Articles of Incorporation, the
business combination and control share acquisition provisions of the MGCL and
the advance notice provisions of the Bylaws could have the effect of
discouraging a takeover or other transaction in which holders of some, or a
majority, of the shares of Common Stock might receive a premium for their
shares of Common Stock over the then prevailing market price or which such
holders might believe to be otherwise in their best interests.
 
DISSOLUTION OF THE COMPANY
 
  Under the MGCL and the Company's Articles of Incorporation, the Company may
be dissolved by (i) the affirmative vote of a majority of the entire Board of
Directors declaring such dissolution to be advisable and directing that the
proposed dissolution be submitted for consideration at any annual or special
meeting of stockholders, and (ii) upon proper notice, stockholder approval by
the affirmative vote of the holders of two-thirds of the total number of
shares of capital stock outstanding and entitled to vote thereon voting as a
single class.
 
LIMITATION OF DIRECTORS' AND OFFICERS' LIABILITY
 
  The Company's officers and directors are and will be indemnified under
Maryland law, the Company's Articles of Incorporation of the Company and the
Partnership Agreement (as defined) of the Operating Partnership against
certain liabilities. The Articles of Incorporation and Bylaws require the
Company to indemnify its directors and officers to the fullest extent
permitted from time to time by the laws of Maryland.
 
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<PAGE>
 
  The MGCL permits a corporation to indemnify its directors and officers and
certain other parties against judgments, penalties, fines, settlements, and
reasonable expenses actually incurred by them in connection with any
proceeding to which they may be made a party by reason of their service in
those or other capacities unless it is established that the act or omission of
the director or officer was material to the matter giving rise to the
proceeding and was committed in bad faith or was the result of active and
deliberate dishonesty, or the director or officer actually received an
improper personal benefit in money, property or services, or in the case of
any criminal proceeding, the director or officer had reasonable cause to
believe that the act or omission was unlawful. Indemnification may be made
against judgments, penalties, fines, settlements and reasonable expenses
actually incurred by the director or officer in connection with the
proceeding; provided, however, that if the proceeding is one by or in the
right of the corporation, indemnification may not be made with respect to any
proceeding in which the director or officer has been adjudged to be liable to
the corporation. In addition, a director or officer may not be indemnified
with respect to any proceeding charging improper personal benefit to the
director or officer in which the director or officer was adjudged to be liable
on the basis that personal benefit was received. The termination of any
proceeding by conviction, or upon a plea of nolo contendere or its equivalent,
or an entry of any order of probation prior to judgment, creates a rebuttable
presumption that the director or officer did not meet the requisite standard
of conduct required for indemnification to be permitted.
 
  The MGCL permits the articles of incorporation of a Maryland corporation to
include a provision limiting the liability of its directors and officers to
the corporation and its stockholders for money damages, subject to specified
restrictions, and the Articles of Incorporation of the Company contain this
provision. The law does not, however, permit the liability of directors and
officers to the corporation or its stockholders to be limited to the extent
that (i) it is proved that the person actually received an improper personal
benefit in money, property or services, (ii) a judgment or other final
adjudication is entered in a proceeding based on a finding that the person's
action, or failure to act, was committed in bad faith or was the result of
active and deliberate dishonesty and was material to the cause of action
adjudicated in the proceeding or (iii) in the case of any criminal proceeding,
the director had reasonable cause to believe that the act or failure to act
was unlawful. This provision does not limit the ability of the Company or its
stockholders to obtain other relief, such as an injunction or rescission.
 
  The Partnership Agreement also provides for indemnification of the Company,
as general partner, and its officers and directors to the same extent
indemnification is provided to officers and directors of the Company in its
Articles of Incorporation, and limits the liability of the Company and its
officers and directors to the Operating Partnership and the partners of the
Operating Partnership to the same extent liability of officers and directors
of the Company to the Company and its stockholders is limited under the
Company's Articles of Incorporation. See "Partnership Agreement of the
Operating Partnership--Indemnification."
 
  Insofar as indemnification for liability arising under the Securities Act
may be permitted to directors, officers or persons controlling the Company
pursuant to the foregoing provisions, the Company has been informed that in
the opinion of the Commission such indemnification is against public policy as
expressed in the Securities Act and is therefore unenforceable.
 
INDEMNIFICATION AGREEMENTS
 
  The Company will enter into indemnification agreements with each of its
executive officers and directors. The indemnification agreements will require,
among other matters, that the Company indemnify its executive officers and
directors to the fullest extent permitted by law and advance to the executive
officers and directors all related expenses, subject to reimbursement if it is
subsequently determined that indemnification is not permitted. Under the
agreements, the Company must also indemnify and advance all expenses incurred
by executive officers and directors seeking to enforce their rights under the
indemnification agreements and may cover executive officers and directors
under the Company's directors' and officers' liability insurance. Although the
form of indemnification agreement offers substantially the same scope of
coverage afforded by law, it provides greater assurance to directors and
executive officers that indemnification will be available, because, as a
contract, it cannot be modified unilaterally in the future by the Board of
Directors or the stockholders to eliminate the rights it provides.
 
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<PAGE>
 
              PARTNERSHIP AGREEMENT OF THE OPERATING PARTNERSHIP
 
  The following summary of the Agreement of Limited Partnership of the
Operating Partnership (the "Partnership Agreement") and the descriptions of
certain provisions set forth elsewhere in this Prospectus, are qualified in
their entirety by reference to the Partnership Agreement, which will be filed
as an exhibit to the Registration Statement of which this Prospectus is a
part.
 
MANAGEMENT
 
  The Operating Partnership will be organized as a Delaware limited
partnership pursuant to the terms of the Partnership Agreement. The Company
will be the sole general partner of, and will initially hold approximately
83.8% of the economic interests in, the Operating Partnership. The Company
will conduct substantially all of its business through the Operating
Partnership, except for development and certain other services (which will be
conducted through the Services Company) in order to preserve the Company's
REIT status. The Operating Partnership will own a 95% economic interest in the
Services Company. Generally, pursuant to the Partnership Agreement, the
Company, as the sole general partner of the Operating Partnership, will have
full, exclusive and complete responsibility and discretion in the management
and control of the Operating Partnership, including the ability to cause the
Operating Partnership to enter into certain major transactions including
acquisitions, dispositions and refinancings and to cause changes in the
Operating Partnership's line of business and distribution policies.
 
  The Continuing Investors, as limited partners of the Operating Partnership,
will have no authority to transact business for, or participate in the
management activities or decisions of, the Operating Partnership, except as
provided in the Partnership Agreement and as required by applicable law.
 
INDEMNIFICATION
 
  To the extent permitted by law, the Partnership Agreement provides for
indemnification of the Company, as general partner, its officers and directors
and such other persons as the Company may designate to the same extent
indemnification is provided to officers and directors of the Company in its
Articles of Incorporation, and limits the liability of the Company and its
officers and directors to the Operating Partnership to the same extent
liability of officers and directors of the Company is limited under the
Articles of Incorporation.
 
TRANSFERABILITY OF INTERESTS
 
  Except for a transaction described in the following two paragraphs, the
Partnership Agreement provides that the Company may not voluntarily withdraw
from the Operating Partnership, or transfer or assign its interest in the
Operating Partnership, without the consent of the holders of 66 2/3% of the
Units representing limited partner interests. Pursuant to the Partnership
Agreement, the Limited Partners have agreed not to transfer, assign, sell,
encumber or otherwise dispose of, without the consent of the Company, their
interest in the Operating Partnership, other than to family members or
accredited investors who agree to assume the obligations of the transferor
under the Partnership Agreement subject to a right of first refusal for the
benefit of the Company. The Continuing Investors are subject to additional
restrictions on their ability to transfer shares of Common Stock. See
"Underwriting."
 
  The Company may not engage in any merger, consolidation or other combination
with or into another person, sale of all or substantially all of its assets or
any reclassification, recapitalization or change of its outstanding equity
interests (each a "Termination Transaction") unless the Termination
Transaction has been approved by holders of at least 66 2/3% of the Units
(including Units held by the Company which will represent 84.8% of all Units
outstanding upon consummation of the Offering) and in connection with which
all Limited Partners either will receive, or will have the right to elect to
receive, for each Unit an amount of cash, securities or other property equal
to the product of the number of shares of Common Stock into which each Unit is
then exchangeable and the greatest amount of cash, securities or other
property paid to the holder of one share of
 
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<PAGE>
 
Common Stock in consideration of one share of Common Stock pursuant to the
Termination Transaction. If, in connection with the Termination Transaction, a
purchase, tender or exchange offer shall have been made to and accepted by the
holders of more than 33 1/3% of the outstanding shares of Common Stock, each
holder of Units will receive, or will have the right to elect to receive, the
greatest amount of cash, securities or other property which such holder would
have received had it exercised its right to redemption and received shares of
Common Stock in exchange for its Units immediately prior to the expiration of
such purchase, tender or exchange offer and had thereupon accepted such
purchase, tender or exchange offer.
 
  The Company may also merge or otherwise combine its assets with another
entity if the following conditions are met: (i) substantially all of the
assets directly or indirectly owned by the surviving entity are held directly
or indirectly by the Operating Partnership or another limited partnership or
limited liability company which is the survivor of a merger, consolidation or
combination of assets with the Operating Partnership (in each case, the
"Surviving Partnership"); (ii) the Limited Partners own a percentage interest
of the Surviving Partnership based on the relative fair market value of the
net assets of the Operating Partnership and the other net assets of the
Surviving Partnership immediately prior to the consummation of such
transaction; (iii) the rights, preferences and privileges of the Limited
Partners in the Surviving Partnership are at least as favorable as those in
effect immediately prior to the consummation of such transaction and as those
applicable to any other limited partners or non-managing members of the
Surviving Partnership; and (iv) such rights of the Limited Partners include
the right to exchange their interests in the Surviving Partnership for at
least one of the following: (a) the consideration available to such persons
pursuant to the preceding paragraph, or (b) if the ultimate controlling person
of the Surviving Partnership has publicly traded common equity securities,
such common equity securities, with an exchange ratio based on the relative
fair market value of such securities and the Common Stock. For purposes of
this paragraph, the determination of relative fair market values shall be
reasonably determined by the Company as of the time of the Termination
Transaction and, to the extent applicable, shall be no less favorable to the
Limited Partners than the relative values reflected in the terms of the
Termination Transaction.
 
  In respect of any transaction described in the preceding two paragraphs, the
Company is required to use its commercially reasonable efforts to structure
such transaction to avoid causing the Limited Partners to recognize gain for
federal income tax purposes by virtue of the occurrence of or their
participation in such transaction. The Operating Partnership will also use
commercially reasonable efforts to cooperate with the Limited Partners to
minimize any taxes payable in connection with any repayment, refinancing,
replacement or restructuring of indebtedness of the Operating Partnership.
 
ISSUANCE OF ADDITIONAL UNITS
 
  As sole general partner of the Operating Partnership, the Company has the
ability to cause the Operating Partnership to issue additional Units
representing general and limited partnership interests in the Operating
Partnership.
 
CAPITAL CONTRIBUTION
 
  The Partnership Agreement provides that if the Operating Partnership
requires additional funds at any time or from time to time in excess of funds
available to the Operating Partnership from borrowings or capital
contributions, the Company may borrow such funds from a financial institution
or other lender or through public or private debt offerings and lend such
funds to the Operating Partnership on the same terms and conditions as are
applicable to the Company's borrowing of such funds. As an alternative to
borrowing funds required by the Operating Partnership, the Company may
contribute the amount of such required funds as an additional capital
contribution to the Operating Partnership. If the Company so contributes
additional capital to the Operating Partnership, the Company's partnership
interest in the Operating Partnership will be increased on a proportionate
basis. Conversely, the partnership interests of the limited partners will be
decreased on a proportionate basis in
 
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<PAGE>
 
the event of additional capital contributions by the Company. See "Policies
With Respect to Certain Activities--Financing."
 
AWARDS UNDER STOCK INCENTIVE PLAN
 
  If options granted in connection with the Stock Incentive Plan are exercised
at any time or from time to time, the Partnership Agreement requires the
Company to contribute to the Operating Partnership as an additional
contribution the exercise price received by the Company in connection with the
issuance of shares of Common Stock to such exercising participant. Upon such
contribution the Company will be issued a number of Units in the Operating
Partnership equal to the number of shares of Common Stock so issued.
 
REDEMPTION/EXCHANGE RIGHTS
 
  Limited partners will have rights to require the Operating Partnership to
redeem part or all of their Units for cash (based upon the fair market value
of an equivalent number of shares of Common Stock at the time of such
redemption) or the Company may elect to exchange such Units for shares of
Common Stock (on a one-for-one basis, subject to adjustment in the event of
stock splits, stock dividends, issuance of certain rights, certain
extraordinary distributions and similar events), provided, however, that if
the Company does not elect to exchange such Units for shares of Common Stock,
a holder of Units that is a corporation or a limited liability company may
require the Company to issue Common Stock in lieu thereof, subject to the
Ownership Limit or such other limit as provided in the Company's Articles of
Incorporation or as otherwise permitted by the Board of Directors, as
applicable. The Company presently anticipates that it will elect to issue
Common Stock in exchange for Units in connection with each such redemption
request, rather than having the Operating Partnership pay cash. With each such
redemption or exchange, the Company's percentage ownership interest in the
Operating Partnership will increase. This redemption/exchange right may be
exercised by limited partners from time to time, in whole or in part, subject
to the limitations that such right may not be exercised (i) prior to the
expiration of two years following the consummation of the Offering or (ii) at
any time to the extent such exercise would result in any person actually or
constructively owning Common Stock in excess of the Ownership Limit or such
other amount as provided in the Company's Articles of Incorporation or as
otherwise permitted by the Board of Directors, as applicable, assuming Common
Stock was issued in such exchange. See "Description of Capital Stock--
Restrictions on Ownership and Transfer." In addition, under certain
circumstances the Units may be redeemed prior to the second anniversary of the
consummation of the Offering in connection with the obligation of certain of
the Continuing Investors to indemnify the Company in connection with the
Formation Transactions. See "Formation and Structure of the Company--
Allocation of Consideration in the Formation Transactions."
 
REGISTRATION RIGHTS
 
  For a description of certain registration rights held by the Continuing
Investors, see "Shares Available for Future Sale--Redemption/Exchange
Rights/Registration Rights."
 
TAX MATTERS
 
  Pursuant to the Partnership Agreement, the Company will be the tax matters
partner of the Operating Partnership and, as such, will have authority to make
tax elections under the Code on behalf of the Operating Partnership.
 
  The net income or net loss of the Operating Partnership will generally be
allocated to the Company and the limited partners in accordance with their
respective percentage interests in the Operating Partnership, subject to
compliance with the provisions of Sections 704(b) and 704(c) of the Code and
the Treasury Regulations promulgated thereunder. See "Federal Income Tax
Consequences--Tax Aspects of the Operating Partnership."
 
                                      117
<PAGE>
 
OPERATIONS
 
  The Partnership Agreement requires that the Operating Partnership be
operated in a manner that will enable the Company to satisfy the requirements
for being classified as a REIT and to avoid any federal income tax liability.
The Partnership Agreement provides that the net operating cash revenues of the
Operating Partnership, as well as net sales and refinancing proceeds, will be
distributed from time to time as determined by the Company (but not less
frequently than quarterly) pro rata in accordance with the partners'
respective percentage interests. Pursuant to the Partnership Agreement, the
Operating Partnership will assume and pay when due, or reimburse the Company
for payment of, all expenses it incurs relating to the ownership and operation
of, or for the benefit of, the Operating Partnership and all costs and
expenses relating to the operations of the Company.
 
DUTIES AND CONFLICTS
 
  Except as otherwise set forth in "Policies with Respect to Certain
Activities--Conflicts of Interest Policies" and "Management--Employment
Agreements," any limited partner of the Operating Partnership may engage in
other business activities outside the Operating Partnership, including
business activities that directly compete with the Operating Partnership.
 
CERTAIN LIMITED PARTNER APPROVAL RIGHTS
 
  The Partnership Agreement provides that if the Limited Partners own at least
5% of the outstanding Units (including Units held by the Company), the Company
shall not, on behalf of the Operating Partnership, take any of the following
actions without the prior consent of the holders of at least 50% of the Units
representing limited partner interests: (i) dissolve the Operating
Partnership, other than incident to a merger or sale of substantially all of
the Company's assets; or (ii) prior to the seventh anniversary of the
consummation of the Offering, sell certain specified assets, other than
incident to a merger or sale of substantially all of the Company's assets.
 
TERM
 
  The Operating Partnership will continue in full force and effect for 99
years or until sooner dissolved pursuant to the terms of the Partnership
Agreement.
 
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<PAGE>
 
                       SHARES AVAILABLE FOR FUTURE SALE
 
GENERAL
 
  Upon the consummation of the Offering and the Formation Transactions, the
Company will have outstanding 9,260,000 shares of Common Stock 10,649,000
shares if the Underwriters' over-allotment option is exercised in full), all
of which will be freely tradeable in the public market by persons other than
"affiliates" of the Company without restriction or registration under the
Securities Act.
 
  Each of the Continuing Investors has agreed not to, directly or indirectly,
offer, sell, offer to sell, contract to sell, pledge, grant any option to
purchase or otherwise sell or dispose (or announce any offer, sale, offer to
sell, contract of sale, pledge, grant of any option to purchase or other sale
or disposition) of any Units or shares of Common Stock or other capital stock
of the Company, or any securities convertible or exercisable or exchangeable
for any Units or shares of Common Stock or other capital stock for a period of
two years from the date of this Prospectus, and the Company has agreed not to
offer, sell, offer to sell, contract to sell, pledge, grant any option to
purchase or otherwise sell or dispose (or announce any offer, sale, offer of
sale, contract of sale, pledge, grant of any option to purchase or other sale
or disposition) of any (other than pursuant to the Stock Incentive Plan)
shares of Common Stock or other capital stock of the Company, or any
securities convertible or exercisable or exchangeable for any Units or shares
of Common Stock or other capital stock of the Company, for a period of one
year from the date of this Prospectus, in each case without the prior written
consent of Prudential Securities Incorporated, on behalf of the Underwriters,
subject to certain limited exceptions. Notwithstanding the foregoing, the
Units received by certain of the Continuing Investors in connection with the
Formation Transactions will be pledged to secure their indemnification
obligations pursuant to an agreement with the Company. See "Formation and
Structure of the Company."
 
  The shares of Common Stock owned by "affiliates" of the Company, and the
shares of Common Stock issuable upon exchange of Units (other than those
issued pursuant to registration rights, as described below), will be subject
to Rule 144 promulgated under the Securities Act ("Rule 144") and may not be
sold in the absence of registration under the Securities Act unless an
exemption from registration is available, including exemptions contained in
Rule 144.
 
  In general, under Rule 144 as currently in effect, a person (or persons
whose shares are aggregated with them in accordance with Rule 144) who has
beneficially owned "restricted shares" (defined generally as shares acquired
from the issuer or an affiliate in a non-public transaction) for at least two
years, as well as any person who purchased unrestricted shares on the open
market who may be deemed an affiliate of the Company, would be entitled to
sell, subject to certain manner of sale, public information and notice
requirements, within any three-month period, a number of shares of Common
Stock that does not exceed the greater of 1% of the then-outstanding number of
shares of Common Stock or 1% of the average weekly trading volume of those
shares during the four calendar weeks preceding each such sale. After
restricted shares are held for three years, a person who is not then deemed an
affiliate of the Company is entitled to sell such shares under Rule 144
without regard to these volume limitations. Sales of shares of Common Stock by
affiliates of the Company will continue to be subject to the volume
limitations, unless resold under an effective registration statement under the
Securities Act. The Commission has published a notice of proposed rulemaking
which, if adopted as proposed, would shorten the applicable holding period
under Rule 144(d) and Rule 144(k) to one and two years, respectively (from the
current two- and three-year periods described above). The Company cannot
predict whether such amendments will be adopted or the effect thereof on the
trading market for its Common Stock.
 
  The Company has established the Stock Incentive Plan for the purpose of
attracting and retaining executive officers, directors and other key
employees. See "Management--Stock Incentive Plan." Upon the consummation of
the Offering, the Company will issue in the aggregate options to purchase
430,000 shares of Common Stock to executive officers, directors and certain
key employees and has reserved 570,000 additional shares of Common Stock for
future issuance under the Stock Incentive Plan.
 
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<PAGE>
 
  Prior to the date of this Prospectus, there has been no public market for
the shares of Common Stock. The shares of Common Stock have been approved for
listing on the NYSE, subject to official notice of issuance. No prediction can
be made as to the effect, if any, that future sales of shares of Common Stock
(including sales pursuant to Rule 144) or the availability of shares of Common
Stock for future sale will have on the market price prevailing from time to
time. Sales of substantial amounts of shares of Common Stock (including shares
of Common Stock issued upon the exercise of options or the exchange of Units),
or the perception that such sales could occur, could adversely affect
prevailing market prices of the shares of Common Stock and impair the
Company's ability to obtain additional capital through the sale of equity
securities. See "Risk Factors--Shares Available for Future Sale." For a
description of certain restrictions on transfers of Common Stock held by
certain stockholders of the Company, see "Underwriting" and "Description of
Capital Stock--Restrictions on Ownership and Transfer."
 
REDEMPTION/EXCHANGE RIGHTS/REGISTRATION RIGHTS
 
  Each limited partner of the Operating Partnership will have the right to
require the Operating Partnership to redeem part or all of their Units for
cash (based on the fair market value of an equivalent number of shares of
Common Stock at the time of such redemption) or, at the election of the
Company, to exchange such Units for shares of Common Stock, at any time
beginning two years after the completion of the Offering subject to the
obligation of certain of the Continuing Investors to indemnify the Company in
connection with the Formation Transactions. See "Formation and Structure of
the Company--Allocation of Consideration in the Formation Transactions." If
the corporation does not elect to exchange such Units for shares of Common
Stock, a Unitholder that is a corporation or a limited liability company may
require the Company to issue shares of Common Stock in lieu of cash, subject
to the Ownership Limit or such other amount as provided in the Company's
Articles of Incorporation, as applicable. Upon completion of the Formation
Transactions, an aggregate of approximately 1,653,835 Units will be held by
limited partners of the Operating Partnership. If the Company elects to
exchange Units for Common Stock, each Unit will be exchangeable for one share
of Common Stock, subject to adjustment in the event of stock splits,
distribution of rights, extraordinary dividends and similar events.
 
  In order to protect the Company's status as a REIT, a holder of Units is
prohibited from exchanging such Units for shares of Common Stock, to the
extent that as a result of such exchange any person would own or would be
deemed to own, actually or constructively, more than 8.0% of the Common Stock,
except to the extent such holder has been granted an exception to the
Ownership Limit. See "Description of Capital Stock--Restrictions on Ownership
and Transfer."
 
  The Company has granted the Continuing Investors receiving Units in
connection with the Formation Transactions certain registration rights
(collectively, the "Registration Rights") with respect to the shares of Common
Stock acquired upon exchange of Units (the "Registrable Shares"). The Company
has agreed to file and generally keep continuously effective beginning two
years after the completion of the Offering a registration statement covering
the issuance of shares upon exchange of Units and the resale thereof. The
Company will bear expenses incident to its registration obligations upon
exercise of the Registration Rights, including the payment of federal
securities law and state Blue Sky registration fees, except that it will not
bear any underwriting discounts or commissions or transfer taxes relating to
registration of Registrable Shares.
 
REINVESTMENT AND SHARE PURCHASE PLAN
 
  The Company is considering the adoption of a Distribution Reinvestment and
Share Purchase Plan that would allow stockholders to automatically reinvest
cash distributions on their outstanding shares of Common Stock and/or Units to
purchase additional shares of Common Stock at a discounted price and without
the payment of any brokerage commission or service charge. Stockholders would
also have the option of investing limited additional amounts by making cash
payments. No decision has been made yet by the Company whether or not to adopt
such a plan and there can be no assurance that such a plan will ever be
adopted by the Company.
 
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<PAGE>
 
                        FEDERAL INCOME TAX CONSEQUENCES
 
  The following summary of material federal income tax considerations
regarding the Company and the Offering is based on current law, is for general
information only and is not tax advice. The information set forth below, to
the extent that it constitutes matters of law, summaries of legal matters or
legal conclusions, is the opinion of Latham & Watkins, tax counsel to the
Company, as to the material federal income tax considerations relevant to
purchasers of the Common Stock. This discussion does not purport to deal with
all aspects of taxation that may be relevant to particular stockholders in
light of their personal investment or tax circumstances, or to certain types
of stockholders subject to special treatment under the federal income tax
laws, including, without limitation, certain financial institutions, life
insurance companies, dealers in securities or currencies, stockholders holding
Common Stock as part of a conversion transaction, as part of a hedge or
hedging transaction, or as a position in a straddle for tax purposes, tax-
exempt organizations (except to the extent discussed under the heading "--
Taxation of Tax-Exempt Stockholders") or foreign corporations, foreign
partnerships and persons who are not citizens or residents of the United
States (except to the extent discussed under the heading "Taxation of Non-U.S.
Stockholders"). In addition, the summary below does not consider the effect of
any foreign, state, local or other tax laws that may be applicable to
prospective stockholders.
 
  EACH PROSPECTIVE PURCHASER IS ADVISED TO CONSULT HIS OR HER OWN TAX ADVISOR
REGARDING THE SPECIFIC TAX CONSEQUENCES TO HIM OR HER OF THE PURCHASE,
OWNERSHIP AND SALE OF THE COMMON STOCK, INCLUDING THE FEDERAL, STATE, LOCAL,
FOREIGN AND OTHER TAX CONSEQUENCES OF SUCH PURCHASE, OWNERSHIP AND SALE AND OF
POTENTIAL CHANGES IN APPLICABLE TAX LAWS.
 
TAXATION OF THE COMPANY
 
  General. The Company plans to make an election to be taxed as a REIT under
Sections 856 through 860 of the Code commencing with its taxable year ending
December 31, 1996. The Company believes that, commencing with its taxable year
ending December 31, 1996, it will be organized and will operate in such a
manner as to qualify for taxation as a REIT under the Code commencing with
such taxable year, and the Company intends to continue to operate in such a
manner, but no assurance can be given that it will operate or continue to
operate in such a manner so as to qualify or remain qualified.
 
  These sections of the Code and the corresponding Treasury Regulations are
highly technical and complex. The following sets forth the material aspects of
the sections that govern the federal income tax treatment of a REIT and its
stockholders. This summary is qualified in its entirety by the applicable Code
provisions, rules and regulations promulgated thereunder, and administrative
and judicial interpretations thereof.
 
  Latham & Watkins has acted as tax counsel to the Company in connection with
the Offering and the Company's election to be taxed as a REIT. In the opinion
of Latham & Watkins, commencing with the Company's taxable year ending
December 31, 1996, the Company will be organized in conformity with the
requirements for qualification as a REIT, and its proposed method of operation
will enable it to meet the requirements for qualification and taxation as a
REIT under the Code. It must be emphasized that this opinion is based on
various factual assumptions relating to the organization and operation of the
Company, the Operating Partnership and the Services Company, and is
conditioned upon certain representations made by the Company as to factual
matters. In addition, this opinion is based upon the factual representations
of the Company concerning its business and properties as set forth in this
Prospectus and assumes that the actions described in this Prospectus are
completed in a timely fashion. Moreover, such qualification and taxation as a
REIT depends upon the Company's ability to meet (through actual annual
operating results, distribution levels and diversity of stock ownership) the
various qualification tests imposed under the Code discussed below, the
results of which will not be reviewed by Latham & Watkins. Accordingly, no
assurance can be given that the actual results of the Company's operation for
any particular taxable year will satisfy such requirements. Further, the
anticipated income tax treatment described in this Prospectus may be changed,
perhaps retroactively, by legislative, administrative or judicial action at
any time. See "--Failure to Qualify."
 
                                      121
<PAGE>
 
  If the Company qualifies for taxation as a REIT, it generally will not be
subject to federal corporate income taxes on its net income that is currently
distributed to stockholders. This treatment substantially eliminates the
"double taxation" (at the corporate and stockholder levels) that generally
results from investment in a regular corporation. However, the Company will be
subject to federal income tax as follows. First, the Company will be taxed at
regular corporate rates on any undistributed "REIT taxable income," including
undistributed net capital gains. Second, under certain circumstances, the
Company may be subject to the "alternative minimum tax" on its items of tax
preference. Third, if the Company has (i) net income from the sale or other
disposition of "foreclosure property" (defined generally as property acquired
by the Company through foreclosure or otherwise after a default on a loan
secured by the property or a lease of the property) which is held primarily
for sale to customers in the ordinary course of business or (ii) other
nonqualifying income from foreclosure property, it will be subject to tax at
the highest corporate rate on such income. Fourth, if the Company has net
income from prohibited transactions (which are, in general, certain sales or
other dispositions of property held primarily for sale to customers in the
ordinary course of business other than foreclosure property), such income will
be subject to a 100% tax. Fifth, if the Company should fail to satisfy the 75%
gross income test or the 95% gross income test (as discussed below), but has
nonetheless maintained its qualification as a REIT because certain other
requirements have been met, it will be subject to a 100% tax on an amount
equal to (a) the gross income attributable to the greater of the amount by
which the Company fails the 75% or 95% test multiplied by (b) a fraction
intended to reflect the Company's profitability. Sixth, if the Company should
fail to distribute during each calendar year at least the sum of (i) 85% of
its REIT ordinary income for such year, (ii) 95% of its REIT capital gain net
income for such year, and (iii) any undistributed taxable income from prior
periods, the Company would be subject to a 4% excise tax on the excess of such
required distribution over the amounts actually distributed. Seventh, with
respect to any asset (a "Built-In Gain Asset") acquired by the Company from a
corporation which is or has been a C corporation (i.e., generally a
corporation subject to full corporate-level tax) in a transaction in which the
basis of the Built-In Gain Asset in the hands of the Company is determined by
reference to the basis of the asset in the hands of the C corporation, if the
Company recognizes gain on the disposition of such asset during the ten-year
period (the "Recognition Period") beginning on the date on which such asset
was acquired by the Company, then, to the extent of the Built-In Gain (i.e.,
the excess of (a) the fair market value of such asset over (b) the Company's
adjusted basis in such asset, determined as of the beginning of the
Recognition Period), such gain will be subject to tax at the highest regular
corporate rate pursuant to Treasury Regulations that have not yet been
promulgated. The results described above with respect to the recognition of
Built-In Gain assume that the Company will make an election pursuant to IRS
Notice 88-19 and that such treatment is not modified by certain revenue
proposals in the Administration's 1997 Budget Proposal.
 
  Requirements for Qualification. The Code defines a REIT as a corporation,
trust or association; (i) which is managed by one or more trustees or
directors; (ii) the beneficial ownership of which is evidenced by transferable
shares, or by transferable certificates of beneficial interest; (iii) which
would be taxable as a domestic corporation, but for Sections 856 through 859
of the Code; (iv) which is neither a financial institution nor an insurance
company subject to certain provisions of the Code; (v) the beneficial
ownership of which is held by 100 or more persons; (vi) during the last half
of each taxable year not more than 50% in value of the outstanding stock of
which is owned, actually or constructively, by five or fewer individuals (as
defined in the Code to include certain entities); and (vii) which meets
certain other tests, described below, regarding the nature of its income and
assets. The Code provides that conditions (i) to (iv), inclusive, must be met
during the entire taxable year and that condition (v) must be met during at
least 335 days of a taxable year of twelve months, or during a proportionate
part of a taxable year of less than twelve months. Conditions (v) and (vi)
will not apply until after the first taxable year for which an election is
made to be taxed as a REIT. For purposes of conditions (v) and (vi), pension
funds and certain other tax-exempt entities are treated as individuals,
subject to a "look-through" exception in the case of condition (vi).
 
  The Company believes that upon consummation of the Offering it will have
issued sufficient shares of Common Stock with sufficient diversity of
ownership pursuant to the Offering to allow it to satisfy conditions (v) and
(vi). In addition, the Company's Articles of Incorporation provides for
restrictions regarding the transfer and ownership of shares, which
restrictions are intended to assist the Company in continuing to satisfy the
share
 
                                      122
<PAGE>
 
ownership requirements described in (v) and (vi) above. Such ownership and
transfer restrictions are described in "Description of Capital Stock--
Restrictions on Ownership and Transfer." These restrictions, however, may not
ensure that the Company will, in all cases, be able to satisfy the share
ownership requirements described above. If the Company fails to satisfy such
share ownership requirements, the Company's status as a REIT will terminate.
See "--Failure to Qualify." In addition, a corporation may not elect to become
a REIT unless its taxable year is the calendar year. The Company will have a
calendar taxable year.
 
  Ownership of a Partnership Interest. In the case of a REIT which is a
partner in a partnership, Treasury Regulations provide that the REIT will be
deemed to own its proportionate share of the assets of the partnership and
will be deemed to be entitled to the income of the partnership attributable to
such share. In addition, the character of the assets and gross income of the
partnership shall retain the same character in the hands of the REIT for
purposes of Section 856 of the Code, including satisfying the gross income
tests and the asset tests. Thus, the Company's proportionate share of the
assets and items of income of the Operating Partnership (including the
Operating Partnership's share of such items of any subsidiary partnerships)
will be treated as assets and items of income of the Company for purposes of
applying the requirements described herein. A summary of the rules governing
the federal income taxation of partnerships and their partners is provided
below in "--Tax Aspects of the Operating Partnership." The Company has direct
control of the Operating Partnership and intends to operate it consistent with
the requirements for qualification as a REIT.
 
  Income Tests. In order to maintain its qualification as a REIT, the Company
annually must satisfy three gross income requirements. First, at least 75% of
the Company's gross income (excluding gross income from prohibited
transactions) for each taxable year must be derived directly or indirectly
from investments relating to real property or mortgages on real property
(including "rents from real property" and, in certain circumstances, interest)
or from certain types of temporary investments. Second, at least 95% of the
Company's gross income (excluding gross income from prohibited transactions)
for each taxable year must be derived from such real property investments,
dividends, interest and gain from the sale or disposition of stock or
securities (or from any combination of the foregoing). Third, subject to
certain exceptions in the year in which the Company is liquidated, short-term
gain from the sale or other disposition of stock or securities, gain from
prohibited transactions and gain on the sale or other disposition of real
property held for less than four years (apart from involuntary conversions and
sales of foreclosure property) must represent less than 30% of the Company's
gross income (including gross income from prohibited transactions) for each
taxable year. For purposes of applying the 30% gross income test, the holding
period of Properties acquired by the Operating Partnership in the Formation
Transactions will be deemed to have commenced on the date of acquisition.
 
  Rents received by the Company will qualify as "rents from real property" in
satisfying the gross income requirements for a REIT described above only if
several conditions are met. First, the amount of rent must not be based in
whole or in part on the income or profits of any person. However, an amount
received or accrued generally will not be excluded from the term "rents from
real property" solely by reason of being based on a fixed percentage or
percentages of receipts or sales. Second, the Code provides that rents
received from a tenant will not qualify as "rents from real property" in
satisfying the gross income tests if the REIT, or an actual or constructive
owner of 10% or more of the REIT, actually or constructively owns 10% or more
of such tenant (a "Related Party Tenant"). Third, if rent attributable to
personal property, leased in connection with a lease of real property, is
greater than 15% of the total rent received under the lease, then the portion
of rent attributable to such personal property will not qualify as "rents from
real property." Finally, for rents received to qualify as "rents from real
property," the REIT generally must not operate or manage the property or
furnish or render services to the tenants of such property, other than through
an independent contractor from whom the REIT derives no revenue. The REIT may,
however, directly perform certain services that are "usually or customarily
rendered" in connection with the rental of space for occupancy only and are
not otherwise considered "rendered to the occupant" of the property. The
Company does not and will not; (i) charge rent for any property that is based
in whole or in part on the income or profits of any person (except by reason
of being based on a percentage of receipts or sales, as described above); (ii)
rent any property to a Related Party Tenant (unless the Board of Directors
determines in its discretion that the rent received from such Related Party
Tenant is not material and
 
                                      123
<PAGE>
 
will not jeopardize the Company's status as a REIT); (iii) derive rental
income attributable to personal property (other than personal property leased
in connection with the lease of real property, the amount of which is less
than 15% of the total rent received under the lease); or (iv) perform services
considered to be rendered to the occupant of the property, other than through
an independent contractor from whom the Company derives no revenue.
 
  The Services Company will receive fees in exchange for the performance of
certain development activities. Such fees will not accrue to the Company, but
the Company will derive its allocable share of dividends from the Services
Company through its interest in the Operating Partnership, which qualify under
the 95% gross income test, but not the 75% gross income test. The Company
believes that the aggregate amount of any nonqualifying income in any taxable
year will not exceed the limit on nonqualifying income under the gross income
tests.
 
  The Operating Partnership will receive fees in exchange for the performance
of certain management activities for third parties with respect to properties
in which the Operating Partnership does not own an interest, including certain
of the Excluded Properties. Such fees will result in nonqualifying income to
the Company under the 95% and 75% gross income tests. The Company believes
that the aggregate amount of nonqualifying income, including such fees, in any
taxable year will not exceed the limit on nonqualifying income under the gross
income tests.
 
  The term "interest" generally does not include any amount received or
accrued (directly or indirectly) if the determination of such amount depends
in whole or in part on the income or profits of any person. However, an amount
received or accrued generally will not be excluded from the term "interest"
solely by reason of being based on a fixed percentage or percentages of
receipts or sales.
 
  If the Company fails to satisfy one or both of the 75% or 95% gross income
tests for any taxable year, it may nevertheless qualify as a REIT for such
year if it is entitled to relief under certain provisions of the Code. These
relief provisions will be generally available if the Company's failure to meet
such tests was due to reasonable cause and not due to willful neglect, the
Company attaches a schedule of the sources of its income to its federal income
tax return, and any incorrect information on the schedule was not due to fraud
with intent to evade tax. It is not possible, however, to state whether in all
circumstances the Company would be entitled to the benefit of these relief
provisions. For example, if the Company fails to satisfy the gross income
tests because nonqualifying income that the Company intentionally incurs
exceeds the limits on such income, the IRS could conclude that the Company's
failure to satisfy the tests was not due to reasonable cause. If these relief
provisions are inapplicable to a particular set of circumstances involving the
Company, the Company would not qualify as a REIT. As discussed above in
"Federal Income Tax Considerations--Taxation of the Company--General," even if
these relief provisions apply, a 100% tax would be imposed on an amount equal
to (a) the gross income attributable to the greater of the amount by which the
Company failed the 75% or 95% test multiplied by (b) a fraction intended to
reflect the Company's profitability. No similar mitigation provision provides
relief if the Company fails the 30% gross income test. In such case, the
Company would cease to qualify as a REIT.
 
  Any gain realized by the Company on the sale of any property held as
inventory or other property held primarily for sale to customers in the
ordinary course of business (including the Company's share of any such gain
realized by the Operating Partnership) will be treated as income from a
prohibited transaction that is subject to a 100% penalty tax. Such prohibited
transaction income may also have an adverse effect upon the Company's ability
to satisfy the income tests for qualification as a REIT. Under existing law,
whether property is held as inventory or primarily for sale to customers in
the ordinary course of a trade or business is a question of fact that depends
on all the facts and circumstances with respect to the particular transaction.
The Operating Partnership intends to hold the Properties for investment with a
view to long-term appreciation, to engage in the business of acquiring,
developing, owning, and operating the Properties (and other properties) and to
make such occasional sales of the Properties as are consistent with the
Operating Partnership's investment objectives. There can be no assurance,
however, that the IRS might not contend that one or more of such sales is
subject to the 100% penalty tax.
 
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  Asset Tests. The Company, at the close of each quarter of its taxable year,
must also satisfy three tests relating to the nature of its assets. First, at
least 75% of the value of the Company's total assets (including its allocable
share of the assets held by the Operating Partnership) must be represented by
real estate assets including (i) its allocable share of real estate assets
held by partnerships in which the Company owns a direct or indirect interest
(such as the Operating Partnership) and (ii) stock or debt instruments held
for not more than one year purchased with the proceeds of a stock offering or
long-term (at least five years) public debt offering of the Company, cash,
cash items and government securities. Second, not more than 25% of the
Company's total assets (including its allocable share of the assets held by
the Operating Partnership) may be represented by securities other than those
in the 75% asset class. Third, of the investments included in the 25% asset
class, the value of any one issuer's securities owned by the Company may not
exceed 5% of the value of the Company's total assets and the Company may not
own more than 10% of any one issuer's outstanding voting securities.
 
  As described above, the Operating Partnership owns 100% of the non-voting
preferred stock of the Services Company, and by virtue of its ownership of
interests in the Operating Partnership, the Company will be considered to own
its pro rata share of such stock. See "Structure and Formation of the
Company." The Operating Partnership does not and will not own any of the
voting securities of the Services Company, and therefore the Company will not
be considered to own more than 10% of the voting securities of the Services
Company. In addition, the Company believes (and has represented to tax counsel
to the Company for purposes of its opinion, as described above) that the value
of its pro rata share of the securities of the Services Company to be held by
the Operating Partnership will not exceed, at the closing of the Offering, 5%
of the total value of the Company's assets, and will not exceed such amount in
the future. Latham & Watkins, in rendering its opinion as to the qualification
of the Company as a REIT, is relying on the representation of the Company to
such effect. No independent appraisals have been obtained to support this
conclusion. There can be no assurance that the IRS will not contend that the
value of the securities of the Services Company held by the Company (through
the Operating Partnership) exceeds the 5% value limitation.
 
  The 5% value test must be satisfied not only on the date that the Company
(directly or through the Operating Partnership) acquires securities in the
Services Company, but also each time the Company increases its ownership of
securities of the Services Company (including as a result of increasing its
interest in the Operating Partnership as a result of Company capital
contributions to the Operating Partnership or as limited partners exercise
their redemption/exchange rights). Although the Company plans to take steps to
ensure that it satisfies the 5% value test for any quarter with respect to
which retesting is to occur, there can be no assurance that such steps will
always be successful, or will not require a reduction in the Operating
Partnership's overall interest in the Services Company.
 
  After initially meeting the asset tests at the close of any quarter, the
Company will not lose its status as a REIT for failure to satisfy the asset
tests at the end of a later quarter solely by reason of changes in asset
values. If the failure to satisfy the asset tests results from an acquisition
of securities or other property during a quarter (including as a result of the
Company increasing its interest in the Operating Partnership), the failure can
be cured by the disposition of sufficient nonqualifying assets within 30 days
after the close of that quarter. The Company intends to maintain adequate
records of the value of its assets to ensure compliance with the asset tests
and to take such other actions within 30 days after the close of any quarter
as may be required to cure any noncompliance. If the Company fails to cure
noncompliance with the asset tests within such time period, the Company would
cease to qualify as a REIT.
 
  Annual Distribution Requirements. The Company, in order to qualify as a
REIT, is required to distribute dividends (other than capital gain dividends)
to its stockholders in an amount at least equal to (i) the sum of (a) 95% of
the Company's "REIT taxable income" (computed without regard to the dividends
paid deduction and by excluding the Company's net capital gain) and (b) 95% of
the excess of the net income, if any, from foreclosure property over the tax
imposed on such income, minus (ii) the excess of the sum of certain items of
noncash income (i.e., income attributable to leveled stepped rents, original
issue discount or purchase money debt, or a like-kind exchange that is later
determined to be taxable) over 5% of "REIT Taxable Income" as described in
clause (i)(a) above. In addition, if the Company disposes of any Built-In Gain
Asset during its
 
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<PAGE>
 
Recognition Period, the Company will be required, pursuant to Treasury
Regulations which have not yet been promulgated, to distribute at least 95% of
the Built-in Gain (after tax), if any, recognized on the disposition of such
asset. Such distributions must be paid in the taxable year to which they
relate, or in the following taxable year if declared before the Company timely
files its tax return for such year and if paid on or before the first regular
dividend payment after such declaration. Such distributions are taxable to
holders of Common Stock (other than tax-exempt entities, as discussed below)
in the year in which paid, even though such distributions relate to the prior
year for purposes of the Company's 95% distribution requirement. The amount
distributed must not be preferential--i.e., each holder of shares of Common
Stock must receive the same distribution per share. A REIT may have more than
one class of capital stock, as long as distributions within each class are pro
rata and non-preferential. To the extent that the Company does not distribute
all of its net capital gain or distributes at least 95%, but less than 100%,
of its "REIT taxable income," as adjusted, it will be subject to tax thereon
at regular ordinary and capital gain corporate tax rates. The Company intends
to make timely distributions sufficient to satisfy these annual distribution
requirements. In this regard, the Partnership Agreement authorizes the
Company, as general partner, to take such steps as may be necessary to cause
the Operating Partnership to distribute to its partners an amount sufficient
to permit the Company to meet these distribution requirements.
 
  It is expected that the Company's REIT taxable income will be less than its
cash flow due to the allowance of depreciation and other non-cash charges in
computing REIT taxable income. Accordingly, the Company anticipates that it
will generally have sufficient cash or liquid assets to enable it to satisfy
the distribution requirements described above. It is possible, however, that
the Company, from time to time, may not have sufficient cash or other liquid
assets to meet these distribution requirements due to timing differences
between (i) the actual receipt of income and actual payment of deductible
expenses and (ii) the inclusion of such income and deduction of such expenses
in arriving at taxable income of the Company. In the event that such timing
differences occur, in order to meet the distribution requirements, the Company
may find it necessary to arrange for short-term, or possibly long-term,
borrowings, to pay dividends in the form of taxable stock dividends.
 
  If the Company fails to meet the 95% distribution test due to certain
adjustments (e.g., an increase in the Company's income or a decrease in its
deduction for dividends paid) by reason of a judicial decision or by agreement
with the IRS, the Company may pay a "deficiency dividend" to holders of shares
of Common Stock in the taxable year of the adjustment, which dividend would
relate back to the year being adjusted. In such case, the Company would also
be required to pay interest to the IRS and would be subject to any applicable
penalty provisions.
 
  Furthermore, if the Company should fail to distribute during each calendar
year at least the sum of (i) 85% of its REIT ordinary income for such year,
(ii) 95% of its REIT capital gain income for such year, and (iii) any
undistributed taxable income from prior periods, the Company would be subject
to a 4% excise tax on the excess of such required distribution over the
amounts actually distributed.
 
FAILURE TO QUALIFY
 
  If the Company fails to qualify for taxation as a REIT in any taxable year,
and the relief provisions do not apply, the Company will be subject to tax
(including any applicable alternative minimum tax) on its taxable income at
regular corporate rates. Distributions to stockholders in any year in which
the Company fails to qualify will not be deductible by the Company nor will
they be required to be made. As a result, the Company's failure to qualify as
a REIT would reduce the cash available for distribution by the Company to its
stockholders. In addition, if the Company fails to qualify as a REIT, all
distributions to stockholders will be taxable as ordinary income, to the
extent of the Company's current and accumulated earnings and profits, and,
subject to certain limitations of the Code, corporate distributees may be
eligible for the dividends received deduction. Unless entitled to relief under
specific statutory provisions, the Company will also be disqualified from
taxation as a REIT for the four taxable years following the year during which
qualification was lost. It is not possible to state whether in all
circumstances the Company would be entitled to such statutory relief.
 
 
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<PAGE>
 
TAXATION OF TAXABLE U.S. STOCKHOLDERS GENERALLY
 
  As used herein, the term "U.S. Stockholder" means a holder of shares of
Common Stock who (for United States federal income tax purposes) (i) is a
citizen or resident of the United States, (ii) is a corporation, partnership,
or other entity created or organized in or under the laws of the United States
or of any political subdivision thereof, or (iii) is an estate or trust the
income of which is subject to United States federal income taxation regardless
of its source.
 
  As long as the Company qualifies as a REIT, distributions made by the
Company out of its current or accumulated earnings and profits (and not
designated as capital gain dividends) will constitute dividends taxable to its
taxable U.S. Stockholders as ordinary income. Such distributions will not be
eligible for the dividends received deduction otherwise available with respect
to dividends received by U.S. Stockholders that are corporations.
Distributions made by the Company that are properly designated by the Company
as capital gain dividends will be taxable to taxable U.S. Stockholders as
long-term capital gains (to the extent that they do not exceed the Company's
actual net capital gain for the taxable year) without regard to the period for
which a U.S. Stockholder has held his shares of Common Stock. U.S.
Stockholders that are corporations may, however, be required to treat up to
20% of certain capital gain dividends as ordinary income. To the extent that
the Company makes distributions (not designated as capital gain dividends) in
excess of its current and accumulated earnings and profits, such distributions
will be treated first as a tax-free return of capital to each U.S.
Stockholder, reducing the adjusted basis which such U.S. Stockholder has in
his shares of Common Stock for tax purposes by the amount of such distribution
(but not below zero), with distributions in excess of a U.S. Stockholder's
adjusted basis in his shares taxable as long-term capital gains (or short-term
capital gain if the shares have been held for one year or less), provided that
the shares have been held as a capital asset. Dividends declared by the
Company in October, November, or December of any year and payable to a
stockholder of record on a specified date in any such month shall be treated
as both paid by the Company and received by the stockholder on December 31 of
such year, provided that the dividend is actually paid by the Company on or
before January 31 of the following calendar year. Stockholders may not include
in their own income tax returns any net operating losses or capital losses of
the Company.
 
  Distributions made by the Company and gain arising from the sale or exchange
by a U.S. Stockholder of shares of Common Stock will not be treated as passive
activity income, and, as a result, U.S. Stockholders generally will not be
able to apply any "passive losses" against such income or gain. Distributions
made by the Company (to the extent they do not constitute a return of capital)
generally will be treated as investment income for purposes of computing the
investment income limitation. Gain arising from the sale or other disposition
of Common Stock, however, will not be treated as investment income unless the
U.S. Stockholder elects to reduce the amount of such U.S. Stockholder's total
net capital gain eligible for the 28% maximum capital gains rate by the amount
of such gain with respect to such Common Stock.
 
  Upon any sale or other disposition of Common Stock, a U.S. Stockholder will
recognize gain or loss for federal income tax purposes in an amount equal to
the difference between (i) the amount of cash and the fair market value of any
property received on such sale or other disposition and (ii) the holder's
adjusted basis in such shares of Common Stock for tax purposes. Such gain or
loss will be capital gain or loss if the shares have been held by the U.S.
Stockholder as a capital asset, and will be long-term gain or loss if such
shares have been held for more than one year. In general, any loss recognized
by a U.S. Stockholder upon the sale or other disposition of shares of Common
Stock that have been held for six months or less (after applying certain
holding period rules) will be treated as a long-term capital loss, to the
extent of capital gain dividends received by such U.S. Stockholder from the
Company which were required to be treated as long-term capital gains.
 
BACKUP WITHHOLDING
 
  The Company will report to its U.S. Stockholders and the IRS the amount of
dividends paid during each calendar year, and the amount of tax withheld, if
any. Under the backup withholding rules, a stockholder may be subject to
backup withholding at the rate of 31% with respect to dividends paid unless
such holder (a) is a
 
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<PAGE>
 
corporation or comes within certain other exempt categories and, when
required, demonstrates this fact, or (b) provides a taxpayer identification
number, certifies as to no loss of exemption from backup withholding, and
otherwise complies with applicable requirements of the backup withholding
rules. A U.S. Stockholder that does not provide the Company with his correct
taxpayer identification number may also be subject to penalties imposed by the
IRS. Any amount paid as backup withholding will be creditable against the
stockholder's income tax liability. In addition, the Company may be required
to withhold a portion of capital gain distributions to any stockholders who
fail to certify their non-foreign status to the Company. See "--Taxation of
Non-U.S. Stockholders."
 
TAXATION OF TAX-EXEMPT STOCKHOLDERS
 
  The IRS has ruled that amounts distributed as dividends by a qualified REIT
do not constitute unrelated business taxable income ("UBTI") when received by
a tax-exempt entity. Based on that ruling, provided that a tax-exempt
shareholder (except certain tax-exempt shareholders described below) has not
held its shares of Common Stock as "debt financed property" within the meaning
of the Code and such shares are not otherwise used in a trade or business, the
dividend income from the Company will not be UBTI to a tax-exempt shareholder.
Similarly, income from the sale of Common Stock will not constitute UBTI
unless such tax-exempt shareholder has held such shares as "debt financed
property" within the meaning of the Code or has used the shares in a trade or
business.
 
  For tax-exempt shareholders which are social clubs, voluntary employee
benefit associations, supplemental unemployment benefit trusts, and qualified
group legal services plans exempt from federal income taxation under Code
Sections 501(c)(7), (c)(9), (c)(17) and (c)(20), respectively, income from an
investment in the Company will constitute UBTI unless the organization is able
to properly deduct amounts set aside or placed in reserve for certain purposes
so as to offset the income generated by its investment in the Company. Such
prospective investors should consult their own tax advisors concerning these
"set aside" and reserve requirements.
 
  Notwithstanding the above, however, a portion of the dividends paid by a
"pension held REIT" shall be treated as UBTI as to any trust which (i) is
described in Section 401(a) of the Code, (ii) is tax-exempt under Section
501(a) of the Code, and (iii) holds more than 10% (by value) of the interests
in the REIT. Tax-exempt pension funds that are described in Section 401(a) of
the Code are referred to below as "qualified trusts."
 
  A REIT is a "pension held REIT" if (i) it would not have qualified as a REIT
but for the fact that Section 856(h)(3) of the Code provides that stock owned
by qualified trusts shall be treated, for purposes of the "not closely held"
requirement, as owned by the beneficiaries of the trust (rather than by the
trust itself), and (ii) either (a) at least one such qualified trust holds
more than 25% (by value) of the interests in the REIT, or (b) one or more such
qualified trusts, each of which owns more than 10% (by value) of the interests
in the REIT, hold in the aggregate more than 50% (by value) of the interests
in the REIT. The percentage of any REIT dividend treated as UBTI is equal to
the ratio of (i) the UBTI earned by the REIT (treating the REIT as if it were
a qualified trust and therefore subject to tax on UBTI) to (ii) the total
gross income of the REIT. A de minimis exception applies where the percentage
is less than 5% for any year. The provisions requiring qualified trusts to
treat a portion of REIT distributions as UBTI will not apply if the REIT is
able to satisfy the "not closely held" requirement without relying upon the
"look-through" exception with respect to qualified trusts. As a result of
certain limitations on transfer and ownership of Common Stock contained in the
Articles of Incorporation, the Company does not expect to be classified as a
"pension held REIT."
 
TAXATION OF NON-U.S. STOCKHOLDERS
 
  The rules governing United States federal income taxation of the ownership
and disposition of stock by persons that are, for purposes of such taxation,
nonresident alien individuals, foreign corporations, foreign partnerships or
foreign estates or trusts (collectively, "Non-U.S. Stockholders") are complex,
and no attempt is made herein to provide more than a brief summary of such
rules. Accordingly, the discussion does not address all aspects of United
States federal income tax and does not address state, local or foreign tax
consequences that
 
                                      128
<PAGE>
 
may be relevant to a Non-U.S. Stockholder in light of its particular
circumstances, including, for example, if the investment in the Company is
connected to the conduct by a Non-U.S. Stockholder of a U.S. trade or
business. In addition, this discussion is based on current law, which is
subject to change, and assumes that the Company qualifies for taxation as a
REIT. Prospective Non-U.S. Stockholders should consult with their own tax
advisers to determine the impact of federal, state, local and foreign income
tax laws with regard to an investment in Common Stock, including any reporting
requirements.
 
  Distributions. Distributions by the Company to a Non-U.S. Stockholder that
are neither attributable to gain from sales or exchanges by the Company of
United States real property interests nor designated by the Company as capital
gains dividends will be treated as dividends of ordinary income to the extent
that they are made out of current or accumulated earnings and profits of the
Company. Such distributions ordinarily will be subject to withholding of
United States federal income tax on a gross basis (that is, without allowance
of deductions) at a 30% rate or such lower rate as may be specified by an
applicable income tax treaty, unless the dividends are treated as effectively
connected with the conduct by the Non-U.S. Stockholder of a United States
trade or business. Dividends that are effectively connected with such a trade
or business will be subject to tax on a net basis (that is, after allowance of
deductions) at graduated rates, in the same manner as domestic stockholders
are taxed with respect to such dividends and are generally not subject to
withholding. Any such dividends received by a Non-U.S. Stockholder that is a
corporation may also be subject to an additional branch profits tax at a 30%
rate or such lower rate as may be specified by an applicable income tax
treaty.
 
  Pursuant to current Treasury Regulations, dividends paid to an address in a
country outside the United States are generally presumed to be paid to a
resident of such country for purposes of determining the applicability of
withholding discussed above and the applicability of a tax treaty rate. Under
proposed Treasury Regulations, not currently in effect, however, a Non-U.S.
Stockholder who wished to claim the benefit of an applicable treaty rate would
be required to satisfy certain certification and other requirements. Under
certain treaties, lower withholding rates generally applicable to dividends do
not apply to dividends from a REIT, such as the Company. Certain certification
and disclosure requirements must be satisfied to be exempt from withholding
under the effectively connected income exemption discussed above.
 
  Distributions in excess of current or accumulated earnings and profits of
the Company will not be taxable to a Non-U.S. Stockholder to the extent that
they do not exceed the adjusted basis of the stockholders's Common Stock, but
rather will reduce the adjusted basis of such stock. To the extent that such
distributions exceed the adjusted basis of a Non-U.S. Stockholder's Common
Stock, they will give rise to gain from the sale or exchange of his stock, the
tax treatment of which is described below. If it cannot be determined at the
time a distribution is made whether or not such distribution will be in excess
of current or accumulated earnings and profits, the distribution will
generally be treated as a dividend for withholding purposes. However, amounts
thus withheld are generally refundable if it is subsequently determined that
such distribution was, in fact, in excess of current or accumulated earnings
and profits of the Company.
 
  Distributions to a Non-U.S. Stockholder that are designated by the Company
at the time of distribution as capital gains dividends (other than those
arising from the disposition of a United States real property interest)
generally will not be subject to United States federal income taxation, unless
(i) investment in the Common Stock is effectively connected with the Non-U.S.
Stockholder's United States trade or business, in which case the Non-U.S.
Stockholder will be subject to the same treatment as domestic stockholders
with respect to such gain (except that a stockholder that is a foreign
corporation may also be subject to the 30% branch profits tax, as discussed
above), or (ii) the Non-U.S. Stockholder is a nonresident alien individual who
is present in the United States for 183 days or more during the taxable year
and has a "tax home" in the United States, in which case the nonresident alien
individual will be subject to a 30% tax on the individual's capital gains.
 
  Distributions to a Non-U.S. Stockholder that are attributable to gain from
sales or exchanges by the Company of United States real property interests
will cause the Non-U.S. Stockholder to be treated as recognizing such gain as
income effectively connected with a United States trade or business. Non-U.S.
Stockholders would thus generally be entitled to offset its gross income by
allowable deductions and would pay
 
                                      129
<PAGE>
 
tax on the resulting taxable income at the same rates applicable to domestic
stockholders (subject to a special alternative minimum tax in the case of
nonresident alien individuals). Also, such gain may be subject to a 30% branch
profits tax in the hands of a Non-U.S. Stockholder that is a corporation and
is not entitled to treaty relief or exemption, as discussed above. The Company
is required to withhold 35% of any such distribution. That amount is
creditable against the Non-U.S. Stockholder's United States federal income tax
liability. To the extent that such withholding exceeds the actual tax owed by
the Non-U.S. Stockholder, the Non-U.S. Stockholder may claim a refund from the
IRS.
 
  The Company or any nominee (e.g., a broker holding shares in street name)
may rely on a certificate of non-foreign status on Form W-8 or Form W-9 to
determine whether withholding is required on gains realized from the
disposition of United States real property interests. A domestic person who
holds shares of Common Stock on behalf of a Non-U.S. Stockholder will bear the
burden of withholding, provided that the Company has properly designated the
appropriate portion of a distribution as a capital gain dividend.
 
  Sale of Common Stock. Gain recognized by a Non-U.S. Stockholder upon the
sale or exchange of shares of Common Stock generally will not be subject to
United States taxation unless such shares constitute a "United States real
property interest" within the meaning of the Foreign Investment in Real
Property Tax Act of 1980 ("FIRPTA"). The Common Stock will not constitute a
"United States real property interest" so long as the Company is a
"domestically controlled REIT." A "domestically controlled REIT" is a REIT in
which at all times during a specified testing period less than 50% in value of
its stock is held directly or indirectly by Non- U.S. Stockholders. The
Company believes that at the closing of the Offering it will be a
"domestically controlled REIT," and therefore that the sale of shares of
Common Stock will not be subject to taxation under FIRPTA. However, because
the shares of Common Stock will be publicly traded, no assurance can be given
that the Company will continue to be a "domestically-controlled REIT."
Notwithstanding the foregoing, gain from the sale or exchange of shares of
Common Stock not otherwise subject to FIRPTA will be taxable to a Non-U.S.
Stockholder if the Non-U.S. Stockholder is a nonresident alien individual who
is present in the United States for 183 days or more during the taxable year
and has a "tax home" in the United States. In such case, the nonresident alien
individual will be subject to a 30% United States withholding tax on the
amount of such individual's gain.
 
  If the Company does not qualify as or ceases to be a "domestically-
controlled REIT," gain arising from the sale or exchange by a Non-U.S.
Stockholder of shares of Common Stock would be subject to United States
taxation under FIRPTA as a sale of a "United States real property interest"
unless the shares are "regularly traded" (as defined by applicable Treasury
Regulations) on an established securities market (e.g., the New York Stock
Exchange) and the selling Non-U.S. Stockholder held no more than 5% (after
applying certain constructive ownership rules) of the shares of Common Stock
during the shorter of (i) the period during which the taxpayer held such
shares, or (ii) the 5-year period ending on the date of the disposition of
such shares. If gain on the sale or exchange of shares of Common Stock were
subject to taxation under FIRPTA, the Non-U.S. Stockholder would be subject to
regular United States income tax with respect to such gain in the same manner
as a U.S. Stockholder (subject to any applicable alternative minimum tax, a
special alternative minimum tax in the case of nonresident alien individuals
and the possible application of the 30% branch profits tax in the case of
foreign corporations), and the purchaser of the stock would be required to
withhold and remit to the IRS 10% of the purchase price.
 
  Backup Withholding Tax and Information Reporting. Backup withholding tax
(which generally is a withholding tax imposed at the rate of 31% on certain
payments to persons that fail to furnish certain information under the United
States information reporting requirements) and information reporting will
generally not apply to distributions paid to Non-U.S. Stockholders outside the
United States that are treated as (i) dividends subject to the 30% (or lower
treaty rate) withholding tax discussed above, (ii) capital gains dividends or
(iii) distributions attributable to gain from the sale or exchange by the
Company of United States real property interests. As a general matter, backup
withholding and information reporting will not apply to a payment of the
proceeds of a sale of Common Stock by or through a foreign office of a foreign
broker. Information reporting (but not backup withholding) will apply,
however, to a payment of the proceeds of a sale of Common Stock by a foreign
office
 
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<PAGE>
 
of a broker that (a) is a United States person, (b) derives 50% or more of its
gross income for certain periods from the conduct of a trade or business in
the United States or (c) is a "controlled foreign corporation" (generally, a
foreign corporation controlled by United States stockholders) for United
States tax purposes, unless the broker has documentary evidence in its records
that the holder is a Non-U.S. Stockholder and certain other conditions are
met, or the stockholder otherwise establishes an exemption. Payment to or
through a United States office of a broker of the proceeds of a sale of Common
Stock is subject to both backup withholding and information reporting unless
the stockholder certifies under penalty of perjury that the stockholder is a
Non-U.S. Stockholder, or otherwise establishes an exemption. A Non-U.S.
Stockholder may obtain a refund of any amounts withheld under the backup
withholding rules by filing the appropriate claim for refund with the IRS.
 
  New Proposed Regulations. The United States Treasury has recently issued
proposed Treasury Regulations regarding the withholding and information
reporting rules discussed above. In general, the proposed Treasury Regulations
do not alter the substantive withholding and information reporting
requirements but unify current certification procedures and forms and clarify
and modify reliance standards. If finalized in their current form, the
proposed Treasury Regulations would generally be effective for payments made
after December 31, 1997, subject to certain transition rules.
 
TAX ASPECTS OF THE OPERATING PARTNERSHIP
 
  General. Substantially all of the Company's investments will be held
indirectly through the Operating Partnership. In general, partnerships are
"pass-through" entities which are not subject to federal income tax. Rather,
partners are allocated their proportionate shares of the items of income,
gain, loss, deduction and credit of a partnership, and are potentially subject
to tax thereon, without regard to whether the partners receive a distribution
from the partnership. The Company will include in its income its proportionate
share of the foregoing partnership items for purposes of the various REIT
income tests and in the computation of its REIT taxable income. Moreover, for
purposes of the REIT asset tests, the Company will include its proportionate
share of assets held by the Operating Partnership. See "--Taxation of the
Company."
 
  Entity Classification. The Company's interest in the Operating Partnership
involves special tax considerations, including the possibility of a challenge
by the IRS of the status of the Operating Partnership as a partnership (as
opposed to an association taxable as a corporation) for federal income tax
purposes. If the Operating Partnership was treated as an association, it would
be taxable as a corporation and therefore be subject to an entity-level tax on
its income. In such a situation, the character of the Company's assets and
items of gross income would change and preclude the Company from satisfying
the asset tests and possibly the income tests (see "--Taxation of the
Company--Asset Tests" and "--Income Tests"), and in turn would prevent the
Company from qualifying as a REIT. See "Federal Income Tax Consequences--
Taxation of the Company--Failure to Qualify" above for a discussion of the
effect of the Company's failure to meet such tests for a taxable year. In
addition, a change in the Operating Partnership's status for tax purposes
might be treated as a taxable event in which case the Company might incur a
tax liability without any related cash distributions.
 
  An organization formed as a partnership will be treated as a partnership for
federal income tax purposes rather than as a corporation only if it has no
more than two of the four corporate characteristics that the Treasury
Regulations use to distinguish a partnership from a corporation for tax
purposes. These four characteristics are (i) continuity of life, (ii)
centralization of management, (iii) limited liability and (iv) free
transferability of interests. The Company has not requested, and does not
intend to request, a ruling from the IRS that the Operating Partnership will
be treated as a partnership for federal income tax purposes. However, in
connection with the closing of the Formation Transactions, Latham & Watkins
will deliver an opinion to the Company stating that based on the provisions of
the Partnership Agreement and certain factual assumptions and representations
described in the opinion, the Operating Partnership will be treated as a
partnership for federal income tax purposes (and not as an association or a
publicly traded partnership taxable as a corporation). Unlike a private letter
ruling, an opinion of counsel is not binding on the IRS, and no assurance can
be given that the IRS will not challenge the status of the Operating
Partnership as a partnership for federal income tax purposes.
 
                                      131
<PAGE>
 
If such challenge were sustained by a court, the Operating Partnership could
be treated as a corporation for federal income tax purposes.
 
  Recently proposed Treasury Regulations (the "Proposed Regulations"), if
finalized in their present form, would eliminate the four factor test
described above and, in its place, permit a partnership or limited liability
company to elect to be taxed as a partnership for federal income tax purposes
without regard to the number of corporate characteristics possessed by such
entity. The Proposed Regulations are proposed to apply for tax periods
beginning on or after the date that final regulations are published by the
IRS. Until that time, the existing regulations will continue to apply. The
Proposed Regulations provide that the IRS will not challenge the
classification of an existing partnership or limited liability company for tax
periods to which the existing Treasury Regulations apply if (i) the entity had
a reasonable basis for its claimed classification, (ii) the entity claimed
that same classification in all prior years, and (iii) as of the date that the
Proposed Regulations were published, neither the entity nor any partner or
member of the entity had been notified in writing that the classification of
the entity is under examination by the IRS. Therefore, if the Proposed
Regulations are finalized in their present form and the Operating Partnerships
meets the conditions above, the IRS will not challenge the status of the
Operating Partnership as a partnership for tax purposes.
 
  Partnership Allocations. Although a partnership agreement will generally
determine the allocation of income and loss among partners, such allocations
will be disregarded for tax purposes if they do not comply with the provisions
of Section 704(b) of the Code and the Treasury Regulations promulgated
thereunder. Generally, Section 704(b) and the Treasury Regulations promulgated
thereunder require that partnership allocations respect the economic
arrangement of the partners.
 
  If an allocation is not recognized for federal income tax purposes, the item
subject to the allocation will be reallocated in accordance with the partners'
interests in the partnership, which will be determined by taking into account
all of the facts and circumstances relating to the economic arrangement of the
partners with respect to such item. The Operating Partnership's allocations of
taxable income and loss are intended to comply with the requirements of
Section 704(b) of the Code and the Treasury Regulations promulgated
thereunder.
 
  The Partnership Agreement provides that net income or net loss of the
Operating Partnership will generally be allocated to the Company and the
limited partners in accordance with their respective percentage interests in
the Operating Partnership. Notwithstanding the foregoing, such agreement
provides that certain interest deductions and income from the discharge of
certain indebtedness of the Operating Partnership, attributable to loans
transferred to the Operating Partnership by certain Continuing Investors, will
be allocated disproportionately to such Continuing Investors. In addition,
allocations of net income or net loss will be subject to compliance with the
provisions of Sections 704(b) and 704(c) of the Code and the Treasury
Regulations promulgated thereunder.
 
  Tax Allocations with Respect to the Properties. Pursuant to Section 704(c)
of the Code, income, gain, loss and deduction attributable to appreciated or
depreciated property (such as the Properties) that is contributed to a
partnership in exchange for an interest in the partnership, must be allocated
in a manner such that the contributing partner is charged with, or benefits
from, respectively, the unrealized gain or unrealized loss associated with the
property at the time of the contribution. The amount of such unrealized gain
or unrealized loss is generally equal to the difference between the fair
market value of contributed property at the time of contribution and the
adjusted tax basis of such property at such time (a "Book-Tax Difference").
Such allocations are solely for federal income tax purposes and do not affect
the book capital accounts or other economic or legal arrangements among the
partners. The Operating Partnership was formed by way of contributions of
appreciated property (including the Properties). Consequently, the Partnership
Agreement requires that such allocations be made in a manner consistent with
Section 704(c) of the Code.
 
  In general, the principals of KI and other Continuing Investors who are
limited partners of the Operating Partnership will be allocated depreciation
deductions for tax purposes which are lower than such deductions would be if
determined on a pro rata basis. In addition, in the event of the disposition
of any of the contributed
 
                                      132
<PAGE>
 
assets which have a Book-Tax Difference, all income attributable to such Book-
Tax Difference will generally be allocated to such limited partners, and the
Company will generally be allocated only its share of capital gains
attributable to appreciation, if any, occurring after the closing of the
Formation Transactions. This will tend to eliminate the Book-Tax Difference
over the life of the Operating Partnership. However, the special allocation
rules of Section 704(c) do not always entirely eliminate the Book-Tax
Difference on an annual basis or with respect to a specific taxable
transaction such as a sale. Thus, the carryover basis of the contributed
assets in the hands the Operating Partnership may cause the Company to be
allocated lower depreciation and other deductions, and possibly an amount of
taxable income in the event of a sale of such contributed assets in excess of
the economic or book income allocated to it as a result of such sale. This may
cause the Company to recognize taxable income in excess of cash proceeds,
which might adversely affect the Company's ability to comply with the REIT
distribution requirements. See "--Taxation of the Company--Annual Distribution
Requirements."
 
  Treasury Regulations under Section 704(c) of the Code provide partnerships
with a choice of several methods of accounting for Book-Tax Differences,
including retention of the "traditional method" or the election of certain
methods which would permit any distortions caused by a Book-Tax Difference to
be entirely rectified on an annual basis or with respect to a specific taxable
transaction such as a sale. The Operating Partnership and the Company have not
yet decided which will be used to account for Book-Tax Differences with
respect to the Properties initially contributed to the Operating Partnership.
 
  With respect to any property purchased by the Operating Partnership
subsequent to the admission of the Company to the Operating Partnership, such
property will initially have a tax basis equal to its fair market value, and
Section 704(c) of the Code will not apply.
 
  Basis in Operating Partnership Interest. The Company's adjusted tax basis in
its interest in the Operating Partnership generally (i) will be equal to the
amount of cash and the basis of any other property contributed to
the Operating Partnership by the Company, (ii) will be increased by (a) its
allocable share of the Operating Partnership's income and (b) its allocable
share of indebtedness of the Operating Partnership and (iii) will be reduced,
but not below zero, by the Company's allocable share of (a) losses suffered by
the Operating Partnership, (b) the amount of cash distributed to the Company
and (c) by constructive distributions resulting from a reduction in the
Company's share of indebtedness of the Operating Partnership.
 
  If the allocation of the Company's distributive share of the Operating
Partnership's loss exceeds the adjusted tax basis of the Company's partnership
interest in the Operating Partnership, the recognition of such excess loss
will be deferred until such time and to the extent that the Company has
adjusted tax basis in its interest in the Operating Partnership. To the extent
that the Operating Partnership's distributions, or any decrease in the
Company's share of the indebtedness of the Operating Partnership (such
decreases being considered a constructive cash distribution to the partners),
exceeds the Company's adjusted tax basis, such excess distributions (including
such constructive distributions) will constitute taxable income to the
Company. Such taxable income will normally be characterized as a capital gain,
and if the Company's interest in the Operating Partnership has been held for
longer than the long-term capital gain holding period (currently one year),
such distributions and constructive distributions will constitute long-term
capital gain.
 
SERVICES COMPANY
 
  A portion of the cash to be used by the Operating Partnership to fund
distributions to partners, and in turn to fund distributions by the Company to
its stockholders, is expected to come from the Services Company, through
dividends on non-voting preferred stock to be held by the Operating
Partnership. The Services Company will not qualify as a REIT and will pay
federal, state and local income taxes on its taxable income at normal
corporate rates. The federal, state and local income taxes that the Services
Company is required to pay will reduce the cash available for distribution by
the Company to its stockholders.
 
  As described above, the value of the Company's indirect interest in the
securities of the Services Company held by the Operating Partnership cannot
exceed 5% of the value of the Company's total assets at the end of any
 
                                      133
<PAGE>
 
calendar quarter in which the Company acquires such securities or increases
its interest in such securities (including as a result of the Company
increasing its interest in the Operating Partnership). See "--Taxation of the
Company--Asset Tests." This limitation may restrict the ability of the
Services Company to increase the size of its business unless the value of the
assets of the Company or the Operating Partnership is increasing at a
commensurate rate.
 
OTHER TAX CONSEQUENCES
 
  The Company and its stockholders may be subject to state or local taxation
in various state or local jurisdictions, including those in which it or they
transact business or reside. The state and local tax treatment of the Company
and its stockholders may not conform to the federal income tax consequences
discussed above. Consequently, prospective stockholders should consult their
own tax advisors regarding the effect of state and local tax laws on an
investment in the Company.
 
                                      134
<PAGE>
 
                             ERISA CONSIDERATIONS
 
  The following is a summary of material considerations arising under ERISA
and the prohibited transaction provisions of Section 4975 of the Code that may
be relevant to a prospective purchaser (including, with respect to the
discussion contained in "--Status of the Company, the Operating Partnership
and the Partnerships under ERISA," to a prospective purchaser that is not an
employee benefit plan, another tax-qualified retirement plan or an individual
retirement account ("IRA")). This discussion does not propose to deal with all
aspects of ERISA or Section 4975 of the Code or, to the extent not preempted,
state law that may be relevant to particular employee benefit plan
shareholders (including plans subject to Title I of ERISA, other employee
benefit plans and IRAs subject to the prohibited transaction provisions of
Section 4975 of the Code, and governmental plans and church plans that are
exempt from ERISA and Section 4975 of the Code but that may be subject to
state law requirements) in light of their particular circumstances.
 
  A FIDUCIARY MAKING THE DECISION TO INVEST IN SHARES OF COMMON STOCK ON
BEHALF OF A PROSPECTIVE PURCHASER WHICH IS AN ERISA PLAN, A TAX-QUALIFIED
RETIREMENT PLAN, AN IRA OR OTHER EMPLOYEE BENEFIT PLAN IS ADVISED TO CONSULT
ITS OWN LEGAL ADVISOR REGARDING THE SPECIFIC CONSIDERATIONS ARISING UNDER
ERISA, SECTION 4975 OF THE CODE, AND (TO THE EXTENT NOT PRE-EMPTED) STATE LAW
WITH RESPECT TO THE PURCHASE, OWNERSHIP OR SALE OF SHARES OF COMMON STOCK BY
SUCH PLAN OR IRA. Plans should also consider the entire discussion under the
heading "Federal Income Tax Considerations," as material contained therein is
relevant to any decision by an employee benefit plan, tax-qualified retirement
plan or IRA to purchase the Common Stock.
 
EMPLOYEE BENEFIT PLANS, TAX-QUALIFIED RETIREMENT PLANS AND IRAS
 
  Each fiduciary of an employee benefit plan subject to Title I of ERISA (an
"ERISA Plan") should carefully consider whether an investment in shares of
Common Stock is consistent with its fiduciary responsibilities under ERISA. In
particular, the fiduciary requirements of Part 4 of Title I of ERISA require
(i) an ERISA Plan's investments to be prudent and in the best interests of the
ERISA Plan, its participants and beneficiaries, (ii) an ERISA Plan's
investments to be diversified in order to reduce the risk of large losses,
unless it is clearly prudent not to do so, (iii) an ERISA Plan's investments
to be authorized under ERISA and the terms of the governing documents of the
ERISA Plan and (iv) that the fiduciary not cause the ERISA Plan to enter into
transactions prohibited under Section 406 of ERISA. In determining whether an
investment in shares of Common Stock is prudent for purposes of ERISA, the
appropriate fiduciary of an ERISA Plan should consider all of the facts and
circumstances, including whether the investment is reasonably designed, as a
part of the ERISA Plan's portfolio for which the fiduciary has investment
responsibility, to meet the objectives of the ERISA Plan, taking into
consideration the risk of loss and opportunity for gain (or other return) from
the investment, the diversification, cash flow and funding requirements of the
ERISA Plan, and the liquidity and current return of the ERISA Plan's
portfolio. A fiduciary should also take into account the nature of the
Company's business, the length of the Company's operating history and other
matters described under "Risk Factors."
 
  The fiduciary of an IRA or of an employee benefit plan not subject to Title
I of ERISA because it is a governmental or church plan or because it does not
cover common law employees (a "Non-ERISA Plan") should consider that such an
IRA or Non-ERISA Plan may only make investments that are authorized by the
appropriate governing documents, not prohibited under Section 4975 of the Code
and permitted under applicable state law.
 
STATUS OF THE COMPANY, THE OPERATING PARTNERSHIP AND THE PARTNERSHIPS UNDER
ERISA
 
  A prohibited transaction may occur if the assets of the Company are deemed
to be assets of the investing Plans and disqualified persons deal with such
assets. In certain circumstances where a Plan holds an interest in an entity,
the assets of the entity are deemed to be Plan assets (the "look-through
rule"). Under such circumstances, any person that exercises authority or
control with respect to the management or disposition of
 
                                      135
<PAGE>
 
such assets is a Plan fiduciary. Plan assets are not defined in ERISA or the
Code, but the United States Department of Labor has issued regulations,
effective March 13, 1987 (the "Regulations"), that outline the circumstances
under which a Plan's interest in an entity will be subject to the look-through
rule.
 
  The Regulations apply only to the purchase by a Plan of an "equity interest"
in an entity, such as common stock of a REIT. However, the Regulations provide
an exception to the look-through rule for equity interests that are "publicly-
offered securities."
 
  Under the Regulations, a "publicly-offered security" is a security that is
(i) freely transferable, (ii) part of a class of securities that is widely-
held and (iii) either (a) part of a class of securities that is registered
under section 12(b) or 12(g) of the Exchange Act or (b) sold to a Plan as part
of an offering of securities to the public pursuant to an effective
registration statement under the Securities Act and the class of securities of
which such security is a part is registered under the Exchange Act within 120
days (or such longer period allowed by the Securities and Exchange Commission)
after the end of the fiscal year of the issuer during which the offering of
such securities to the public occurred. Whether a security is considered
"freely transferable" depends on the facts and circumstances of each case.
Generally, if the security is part of an offering in which the minimum
investment is $10,000 or less, any restriction on or prohibition against any
transfer or assignment of such security for the purposes of preventing a
termination or reclassification of the entity for federal or state tax
purposes will not of itself prevent the security from being considered freely
transferable. A class of securities is considered "widely-held" if it is a
class of securities that is owned by 100 or more investors independent of the
issuer and of one another.
 
  The Company anticipates that the Common Stock will meet the criteria of the
publicly-offered securities exception to the look-through rule. First, the
Company anticipates that the Common Stock will be considered to be freely
transferable, as the minimum investment will be less than $10,000 and the only
restrictions upon its transfer are those required under federal tax laws to
maintain the Company's status as a REIT. Second, the Company believes that the
Common Stock will be held by 100 or more investors and that at least 100 or
more of these investors will be independent of the Company and of one another.
Third, the Common Stock will be part of an offering of securities to the
public pursuant to an effective registration statement under the Securities
Act and will be registered under the Exchange Act within 120 days after the
end of the fiscal year of the Company during which the offering of such
securities to the public occurs. Accordingly, the Company believes that if a
Plan purchases the Common Stock, the Company's assets should not be deemed to
be Plan assets and, therefore, that any person who exercises authority or
control with respect to the Company's assets should not be a Plan fiduciary.
 
                                      136
<PAGE>
 
                                 UNDERWRITING
 
  The Underwriters named below (the "Underwriters"), for whom Prudential
Securities Incorporated ("Prudential Securities"), Donaldson, Lufkin &
Jenrette Securities Corporation, J.P. Morgan Securities Inc. and Smith Barney
Inc. are acting as representatives ("Representatives"), have severally agreed,
subject to the terms and conditions contained in the Underwriting Agreement,
to purchase from the Company the number of shares of Common Stock set forth
below opposite their respective names:
 
<TABLE>
<CAPTION>
                                                                      NUMBER OF
      UNDERWRITER                                                      SHARES
      -----------                                                     ---------
   <S>                                                                <C>
   Prudential Securities Incorporated................................
   Donaldson, Lufkin & Jenrette Securities Corporation...............
   J.P. Morgan Securities Inc........................................
   Smith Barney Inc..................................................
                                                                      ---------
     Total........................................................... 9,260,000
                                                                      =========
</TABLE>
 
  The Company is obligated to sell, and the Underwriters are obligated to
purchase, all of the shares of Common Stock offered hereby if any are
purchased.
 
  The Underwriters, through their Representatives, have advised the Company
that they propose to offer the shares of Common Stock to the public initially
at the public offering price set forth on the cover page of this Prospectus;
that the Underwriters may allow to selected dealers a concession of $    per
share, and that such dealers may re-allow a concession of $    per share to
certain other dealers. After the initial public offering, the offering price
and the concessions may be changed by the Representatives.
 
  The Company has granted the Underwriters an option, exercisable for 30 days
from the date of this Prospectus, to purchase up to 1,389,000 additional
shares of Common Stock at the initial public offering price, less the
underwriting discounts and commissions, as set forth on the cover page of this
Prospectus. The Underwriters may exercise such option solely for the purpose
of covering over-allotments incurred in the sale of shares of Common Stock
offered hereby. To the extent such option to purchase is exercised, each
Underwriter will become obligated, subject to certain conditions, to purchase
approximately the same percentage of such additional shares of Common Stock as
the number set forth next to such Underwriter's name in the preceding table
bears to 9,260,000.
 
  The Company has agreed to indemnify the several Underwriters against or to
contribute to losses arising out of certain liabilities, including liabilities
under the Securities Act of 1933, as amended.
 
  The Representatives of the Underwriters have informed the Company that the
Underwriters do not intend to confirm sales to any accounts over which they
exercise discretionary authority.
 
  Each of the Continuing Investors has agreed not to, directly or indirectly,
offer, sell, offer to sell, contract to sell, pledge, grant any option to
purchase or otherwise sell or dispose (or announce any offer, sale, offer to
sell, pledge, grant of any option to purchase or other sale or disposition) of
any Units or shares of Common Stock or other capital stock of the Company, or
any securities convertible or exercisable or exchangeable for any Units or
shares of Common Stock or other capital stock for a period of two years from
the date of this Prospectus, and the Company has agreed not to offer, sell,
offer to sell, contract to sell, grant any option to purchase or otherwise
sell or dispose (or announce any offer, sale, offer of sale, contract of sale,
pledge, grant of any option to purchase or other sale or disposition) of any
(other than pursuant to the Stock Incentive Plan) shares of Common Stock or
other capital stock of the Company, or any securities convertible or
exercisable or exchangeable for any Units or shares of Common Stock or other
capital stock of the Company, for a period of one year from the date of this
Prospectus, in each case without the prior written consent of Prudential
Securities, on behalf of the Underwriters, subject to certain limited
exceptions. Notwithstanding the foregoing, the Units received by certain of
the Continuing Investors in connection with the Formation Transactions will be
pledged to secure their indemnification obligations pursuant to an agreement
with the Company. See "Formation and Structure of the Company."
 
                                      137
<PAGE>
 
  The shares of Common Stock have been approved for listing on the NYSE,
subject to official notice of issuance. In order to meet one of the
requirements for listing the shares of Common Stock on the NYSE, the
Underwriters have undertaken to sell lots of 100 or more shares to a minimum of
2,000 beneficial holders.
 
  Prior to the Offering, there has been no public market for the Common Stock.
The initial public offering price will be determined through negotiations
between the Company and the Representatives. Among the factors to be considered
in such determination were prevailing market conditions, dividend yields and
financial characteristics of publicly traded REITs that the Company and the
Representatives believe to be comparable to the Company, the present state of
the Company's financial and business operations, the Company's management,
estimates of the business and earnings potential of the Company and the
prospects for the industry in which the Company operates.
 
  Upon consummation of the Offering, Prudential Securities will receive
approximately $   of the net proceeds from the Offering as repayment of
indebtedness, fees and related interest expected to be accrued and unpaid as of
such date. See "Use of Proceeds."
 
  The Prudential Insurance Company of America, an affiliate of Prudential
Securities, is a tenant in one of the Office Properties located in Kilroy Long
Beach, leasing approximately 2,189 square feet of space.
 
  The Company will pay to the Representatives advisory fees equal, in the
aggregate, to 0.75% of the gross proceeds received by the Company in the
Offering, for investment banking services relating to, among other things, the
structuring of the Formation Transactions and the Offering.
 
                                 LEGAL MATTERS
 
  Certain legal matters in connection with the Offering will be passed upon for
the Company by Latham & Watkins, Los Angeles, California. Legal matters
relating to Maryland law, including the validity of the issuance of the shares
of Common Stock offered hereby, will be passed upon for the Company by Ballard
Spahr Andrews & Ingersoll, Baltimore, Maryland. Certain legal matters will be
passed upon for the Underwriters by Kaye, Scholer, Fierman, Hays & Handler,
LLP, New York, New York. In addition, the description of federal income tax
consequences contained in this Prospectus under "Federal Income Tax
Consequences" is, to the extent that it constitutes matters of law, summaries
of legal matters or legal conclusions, the opinion of Latham & Watkins, special
tax counsel to the Company as to the material federal income tax consequences
of the Offering.
 
                                    EXPERTS
 
  The financial statements of Kilroy Realty Corporation as of September 30,
1996, the Kilroy Group as of December 31, 1995 and 1994 and for each of the
three years in the period ended December 31, 1995, and the Acquisition
Properties for the year ended December 31, 1995 included in this Prospectus and
the related financial statement schedule included elsewhere in the Registration
Statement have been audited by Deloitte & Touche LLP, independent auditors, as
stated in their reports appearing herein and elsewhere in the registration
statement, and are included in reliance on the reports of such firm, given upon
their authority as experts in auditing and accounting.
 
  In addition, certain statistical information provided under the captions
"Prospectus Summary--The Company's Southern California Submarkets" and
"Business and Properties--The Company's Southern California Submarkets" has
been prepared by Robert Charles Lesser & Co., and is included herein in
reliance upon the authority of such firm as expert in, among other things, real
estate consulting and urban economics.
 
 
                                      138
<PAGE>
 
                            ADDITIONAL INFORMATION
 
  The Company has filed with the Securities and Exchange Commission (the
"Commission"), 450 Fifth Street N.W., Washington, D.C. 20599, a Registration
Statement (of which this Prospectus is a part) on Form S-11 under the
Securities Act and the rules and regulations promulgated thereunder with
respect to the securities offered hereby. This Prospectus does not contain all
the information set forth in the Registration Statement and the exhibits and
financial statements thereto, certain portions of which have been omitted as
permitted by the rules and regulations of the Commission. Statements contained
in this Prospectus as to the content of any contract or other document are not
necessarily complete, and in each instance reference is made to the copy of
such contract or other document filed as an exhibit to the Registration
Statement, each such statement being qualified in all respects by such
reference and the exhibits and schedules hereto. For further information
regarding the Company and the Common Stock offered hereby, reference is hereby
made to the Registration Statement and such exhibits and schedules, copies of
which may be examined without charge at, or copies obtained upon payment of
prescribed fees from, the Public Reference Section of the Commission at Room
1204, Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549, and at
the following regional offices of the Commission: 7 World Trade Center, 13th
Floor, New York, New York 10048 and Northwestern Atrium Center, 500 West
Madison Street, Suite 1400, Chicago, Illinois 60661-2511, or by way of the
Commission's Internet address, http://www.sec.gov.
 
  Following the consummation of the Offering, the Company will be required to
file reports and other information with the Commission pursuant to the
Exchange Act. In addition to applicable legal or New York Stock Exchange
requirements, if any, the Company intends to furnish its stockholders with
annual reports containing consolidated audited financial statements with a
report thereon by the Company's independent certified public accountants and
with quarterly reports containing unaudited condensed consolidated financial
statements for each of the first three quarters of each fiscal year.
 
 
                                      139
<PAGE>
 
                                   GLOSSARY
 
  "Acquisition Properties" means the two office buildings and related assets
that comprise Kilroy Long Beach Phase I and the Thousand Oaks Office Property
that are expected to be acquired by the Company concurrently with the
completion of the Offering, including, with respect to Kilroy Long Beach Phase
I, the ground lease with respect thereto.
 
  "ADA" means the Americans with Disabilities Act, enacted on July 26, 1990.
 
  "Audit Committee" means the audit committee of the Board of Directors.
 
  "base rent" means gross rent excluding payments by tenants on account of
real estate taxes, operating expenses and utility expenses.
 
  "Class A office buildings" means office buildings that have excellent
location and access, attract major corporate tenants, have high quality
finishes, are well maintained, professionally managed and are either new
buildings or buildings that are competitive with new buildings.
 
  "Code" means the Internal Revenue Code of 1986, as amended.
 
  "Commission" means the Securities and Exchange Commission.
 
  "Common Stock" means common stock, par value $.01 per share, of the Company.
 
  "Company" means Kilroy Realty Corporation and its subsidiaries on a
consolidated basis, including the Operating Partnership and the Services
Company.
 
  "Continuing Investors" shall mean the persons and entities receiving Units
in connection with the Formation Transactions.
 
  "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended.
 
  "Exchange Act" means the Securities Exchange Act of 1934, as amended.
 
  "Executive Committee" means the executive committee of the Board of
Directors.
 
  "Executive Compensation Committee" means the compensation committee of the
Board of Directors.
 
  "Formation Transactions" means those transactions relating to the
organization of the Company and its subsidiaries, including the transfer of
the Properties and other assets to the Company, as described under "Formation
and Structure of the Company--Formation Transactions."
 
  "Funds from Operations" means, in accordance with the resolution adopted by
the Board of Governors of NAREIT, net income (loss) computed in accordance
with GAAP, excluding gains (or losses) from debt restructuring and sales of
property, plus real estate related depreciation and amortization (excluding
amortization of deferred financing costs), and after adjustments for
unconsolidated partnerships and joint ventures.
 
  "Independent Director" means a director of the Company who is not an
employee or officer of the Company or a subsidiary or division thereof, or a
relative of a principal executive officer, and who is not an individual member
of an organization acting as advisor, consultant or legal counsel, receiving
compensation on a continuing basis from the Company in addition to director's
fees.
 
  "Industrial Properties" means the nine industrial properties in which the
Company will have an ownership interest upon completion of the Offering.
 
 
                                      140
<PAGE>
 
  "IRAs" means individual retirement accounts.
 
  "IRS" means the Internal Revenue Service.
 
  "KI" means Kilroy Industries, a California corporation, operating the
Company's business prior to the consummation of the Offering and the Formation
Transactions.
 
  "Kilroy Group" means KI and the partnerships and trusts affiliated with KI
that prior to the Offering owned the Properties and other assets being
transferred to the Company in the Formation Transactions.
 
  "Kilroy Realty Corporation" means Kilroy Realty Corporation, a Maryland
corporation with its principal office at 2250 East Imperial Highway, Suite
1200, El Segundo, California 90245.
 
  "LAX" means Los Angeles International Airport.
 
  "look-through rule" means the ERISA rule providing that in certain
circumstances where a Plan holds an interest in an entity, the assets of the
entity are deemed to be the Plan's assets.
 
  "MGCL" means the Maryland General Corporation Law.
 
  "Mortgage Loan" means the $75 million mortgage loan, the closing of which is
a condition to the completion of the Offering, to be obtained by the Company
concurrently with the consummation of the Offering.
 
  "NAREIT" means the National Association of Real Estate Investment Trusts.
 
  "net absorption" means with respect to a specified area the net increase in
occupied rentable space.
 
  "NYSE" means the New York Stock Exchange, Inc.
 
  "Offering" means the initial public offering of shares of Common Stock of
Kilroy Realty Corporation pursuant to and as described in this Prospectus.
 
  "Office Properties" means the ten Class A office properties in which the
Company will have an ownership interest upon completion of the Offering,
including consummation of the formation transactions and acquisition of the
Acquisition Properties.
 
  "Omnibus Agreement" means the agreement by and among each of the members of
the Continuing Investors and the Company pursuant to which the Continuing
Investors will contribute their interests in the Properties (other than the
Acquisition Properties), and certain other related assets, in exchange for
Units representing limited partnership interests in the Operating Partnership.
 
  "Operating Partnership" means Kilroy Realty, L.P., a Delaware limited
partnership with its office at 2250 East Imperial Highway, Suite 1200, El
Segundo, California 90245, organized in the Formation Transactions and through
which all of the Company's interests in the Properties will be held and real
estate activities will be conducted.
 
  "Ownership Limit" means the restriction contained in the Company's Articles
of Incorporation providing that, subject to certain exceptions, no holder may
own, or be deemed to own by virtue of the constructive ownership provisions of
the Code, more than 8.0% (by number or value, whichever is more restrictive)
of the outstanding shares of Common Stock.
 
  "Partnership Agreement" means the Agreement of Limited Partnership of the
Operating Partnership, as amended from time to time.
 
  "Partnerships" means those corporations, general and limited partnerships
and trusts affiliated with Kilroy Industries whose Properties are being
acquired by the Operating Partnership.
 
                                      141
<PAGE>
 
  "Plans" means employee benefit plans and IRAs.
 
  "Preferred Stock" means shares of preferred stock, par value $.01 per share,
of the Company.
 
  "Properties" means the assets owned by the Partnerships and contributed to
the Company by the Continuing Investors in connection with the Formation
Transactions, including, but not limited to, real property and the Acquisition
Properties.
 
  "Prospectus" means this prospectus relating to the sale of up to 8,750,000
shares of Common Stock of the Company in the Offering, plus the 1,312,500
shares subject to the Underwriters' over-allotment option.
 
  "Regulations" means regulations issued by the United States Department of
Labor defining "plan assets."
 
  "REIT" means a real estate investment trust as defined in Section 856 of the
Code which meets the requirements for qualification as a REIT described in
Sections 856 through 860 of the Code.
 
  "Related Party Tenant" means a tenant of a REIT in which the REIT, or an
owner of 10% or more of the REIT, actually or constructively owns a 10% or
greater ownership interest.
 
  "rentable square feet" means a building's usable area plus common areas and
penetrations, expressed collectively in square feet which are allocated pro
rata to tenants.
 
  "Representatives" means Prudential Securities Incorporated and Donaldson,
Lufkin & Jenrette Securities Corporation and Smith Barney Inc., as
representatives of the Underwriters.
 
  "Rule 144" means Rule 144 promulgated under the Securities Act.
 
  "Securities Act" means the Securities Act of 1933, as amended.
 
  "Services Company" means Kilroy Services, Inc., a Maryland corporation with
its principal office at 2250 East Imperial Highway, Suite     , El Segundo, CA
90245, which will perform certain development services, and the economic value
of which will be owned 95% by the Operating Partnership and 5% collectively by
John B. Kilroy, Sr. and John B. Kilroy, Jr.
 
  "Stock Incentive Plan" means the Company's stock incentive plan, as further
described in this Prospectus under the caption entitled "Management--Stock
Incentive Plan."
 
  "Thousand Oaks Office Property" means the office building and related realty
located at 2829 Townsgate Road, Thousand Oaks, California.
 
  "Treasury Regulations" means regulations of the U.S. Department of Treasury
under the Code.
 
  "Underwriters" means each of the Underwriters named in the section of this
Prospectus entitled "Underwriting."
 
  "Underwriting Agreement" means the Underwriting Agreement between the
Company and the Representatives relating to the purchase of the Common Stock
offered hereby.
 
  "Units" means limited and general partnership interests representing an
ownership interest in the Operating Partnership.
 
                                      142
<PAGE>
 
                         INDEX TO FINANCIAL STATEMENTS
 
<TABLE>
<CAPTION>
                                                                           PAGE
                                                                           ----
<S>                                                                        <C>
Kilroy Realty Corporation
 Pro Forma (Unaudited):
  Pro Forma Condensed Consolidated Balance Sheet as of June 30, 1996......  F-2
  Notes to Pro Forma Condensed Consolidated Balance Sheet.................  F-3
  Pro Forma Condensed Consolidated Statements of Operations for the six
   months ended
   June 30, 1996 and the Year Ended December 31, 1995.....................  F-6
  Notes to Pro Forma Condensed Consolidated Statements of Operations......  F-7
 Historical:
  Independent Auditors' Report............................................  F-8
  Balance Sheet as of September 30, 1996..................................  F-9
  Notes to Balance Sheet.................................................. F-10
Kilroy Group (Predecessor Affiliates)
  Independent Auditors' Report............................................ F-12
  Combined Balance Sheets as of June 30, 1996 (unaudited), and December
   31, 1995 and 1994...................................................... F-13
  Combined Statements of Operations for the six months ended June 30, 1996
   and 1995 (unaudited) and the three years Ended December 31, 1995....... F-14
  Combined Statements of Accumulated Deficit for the six months ended June
   30, 1996 (unaudited) and for the three years Ended December 31, 1995... F-15
  Combined Statements of Cash Flows for the six months ended June 30, 1996
   and 1995 (unaudited) and the three years Ended December 31, 1995....... F-16
  Notes to Combined Financial Statements.................................. F-17
Acquisition Properties
  Independent Auditors' Report............................................ F-26
  Combined Historical Summaries of Certain Revenues and Certain Expenses
   for the six months ended June 30, 1996 (unaudited) and for the year
   ended December 31, 1995................................................ F-27
  Notes to Combined Historical Summaries of Certain Revenues and Certain
   Expenses............................................................... F-28
</TABLE>
 
                                      F-1
<PAGE>
 
                           KILROY REALTY CORPORATION
 
                PRO FORMA CONDENSED CONSOLIDATED BALANCE SHEET
 
                                 JUNE 30, 1996
                                  (UNAUDITED)
                                (IN THOUSANDS)
 
  This unaudited pro forma condensed consolidated balance sheet is presented
as if (i) the transfer of the Properties and business and operations of the
Kilroy Group pursuant to the Formation Transactions and (ii) the Offering, the
Mortgage Loan and use of proceeds to repay indebtedness and purchase the
Acquisition Properties had each occurred on June 30, 1996. Such pro forma
information is based upon the historical balance sheet of the Kilroy Group at
June 30, 1996. The acquisition of the Properties (other than the Acquisition
Properties, which will be recorded at the Company's cost) and business and
operations of the Kilroy Group will be recorded by the Company at the
historical cost reflected in the Kilroy Group financial statements. This pro
forma condensed balance sheet should be read in conjunction with the pro forma
condensed statement of operations of the Company and the historical combined
financial statements and notes thereto of the Kilroy Group and the historical
combined financial statements of the Acquisition Properties included elsewhere
in this Prospectus. See "The Company" and "Use of Proceeds."
 
  The unaudited pro forma condensed balance sheet is not necessarily
indicative of what the actual financial position of the Company would have
been assuming the Company had been formed and the consummation of the
Formation Transactions, the Offering and the Mortgage Loan and the use of
proceeds thereof, and the acquisition of the Acquisition Properties at June
30, 1996, nor does it purport to represent the future financial position of
the Company.
 
<TABLE>
<CAPTION>
                                                   JUNE 30, 1996
                                        ---------------------------------------
                                                                  KILROY REALTY
                          KILROY REALTY   KILROY                   CORPORATION
                           CORPORATION    GROUP     PRO FORMA       PRO FORMA
                           HISTORICAL   HISTORICAL ADJUSTMENTS    CONSOLIDATED
                          ------------- ---------- -----------    -------------
                               (A)         (B)
         ASSETS
<S>                       <C>           <C>        <C>            <C>
Rental properties, net
 of accumulated
 depreciation and
 amortization...........    $     --     $110,320   $  36,300 (C)   $146,620
Cash and cash
 equivalents............            1                     942 (D)        943
Tenant receivables,
 net....................                    3,892                      3,892
Deferred charges and
 other assets, net of
 accumulated
 amortization...........                    7,613         (66)(E)      7,547
                            ---------    --------   ---------       --------
   Total................    $       1    $121,825   $  37,176       $159,002
                            =========    ========   =========       ========
<CAPTION>
     LIABILITIES AND
      STOCKHOLDERS'
    EQUITY (DEFICIT)
<S>                       <C>           <C>        <C>            <C>
Liabilities:
 Debt...................    $     --     $204,601   $(129,601)(F)   $ 75,000
 Accounts payable and
  accrued expenses......                    2,029                      2,029
 Accrued construction
  costs.................                      804        (804)(G)
 Accrued property
  taxes.................                      220                        220
 Accrued interest
  payable...............                    1,380      (1,380)(H)
 Rent received in
  advance and tenant
  security deposits.....                    8,074                      8,074
                            ---------    --------   ---------       --------
   Total liabilities....                  217,108    (131,785)        85,323
                            ---------    --------   ---------       --------
Minority interest.......                               11,199 (I)     11,199
                                                    ---------       --------
Stockholders' equity
 (deficit):
 Common stock...........                                   93 (J)         93
 Additional paid-in
  capital...............            1                 168,868 (J)     62,387
                                                      (11,199)(I)
                                                      (95,283)(K)
 Accumulated deficit....                  (95,283)     95,283 (K)
                            ---------    --------   ---------       --------
   Total stockholders'
    equity (deficit)....            1     (95,283)    157,762         62,480
                            ---------    --------   ---------       --------
   Total................    $       1    $121,825   $  37,176       $159,002
                            =========    ========   =========       ========
</TABLE>
 
                                      F-2
<PAGE>
 
                           KILROY REALTY CORPORATION
 
      NOTES TO PRO FORMA CONDENSED CONSOLIDATED BALANCE SHEET (UNAUDITED)
                 (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)
 
PRO FORMA ADJUSTMENTS
 
  These pro forma adjustments are to reflect the Offering, the Formation
Transactions, including the transfer of the Properties, the purchase of the
Acquisition Properties and the Mortgage Loan and the use of proceeds thereof.
 
(A) Reflects Kilroy Realty Corporation audited balance sheet as of September
    30, 1996.
 
(B) Reflects Kilroy Group unaudited historical combined balance sheet as of
    June 30, 1996.
 
(C) Reflects the cost of the Acquisition Properties.
 
(D) The adjustment to pro forma cash and cash equivalents was determined as
    follows:
 
<TABLE>
   <S>                                                                <C>
   . Net proceeds from the Offering after underwriting discount and
     estimated issuance costs of $15,464............................  $ 169,736
   . Net proceeds from the 8.72% Mortgage Loan after estimated
     issuance cost of $750..........................................     74,250
                                                                      ---------
   . Net proceeds...................................................    243,986
   . Repayment of mortgage debts ...................................   (204,601)
   . Purchase of Acquisition Properties.............................    (36,300)
   . Payment of accrued interest....................................       (643)
   . Payment of Debt Issuance Costs.................................     (1,500)
                                                                      ---------
   Net increase in cash and cash equivalents........................  $     942
                                                                      =========
   (E)Reflects the net decrease as follows:
   . Issuance costs of the Mortgage Financing and Line of Credit....  $   2,250
   . Write-off of loan costs relating to repayment of mortgage
    debt............................................................     (2,316)
                                                                      ---------
   Net decrease in deferred charge..................................  $     (66)
                                                                      =========
 
(F) Reflects the net decrease as follows:
 
   . Issuance of $75,000 aggregate principal amount of 8.72%
     Mortgage Loan payable principal and interest monthly only until
     maturity in 2003...............................................  $  75,000
   . Repayment of mortgage debt from net proceeds of the Offering
     and the Mortgage Loan..........................................   (204,601)
                                                                      ---------
   Net decrease in mortgage debt....................................  $(129,601)
                                                                      =========
</TABLE>
 
(G) Amount represents a liability for construction costs which will not be
    assumed by Kilroy Realty Corporation.
 
(H) Amount represents accrued interest which will not be assumed by Kilroy
    Realty Corporation ($737) and accrued interest paid ($643) in connection
    with the repayment of mortgage debt.
 
 
                                      F-3
<PAGE>
 
                           KILROY REALTY CORPORATION
 
                   NOTES TO PRO FORMA CONDENSED CONSOLIDATED
                    BALANCE SHEET (UNAUDITED)--(CONTINUED)
                 (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)
 
 
(I) Reflects the estimated minority interest of the Continuing Investors in
    the Operating Partnership computed as follows:
 
<TABLE>
<S>                                                                    <C>
Pro forma total assets................................................ $159,001
Pro forma total liabilities...........................................  (85,323)
                                                                       --------
Pro forma net book value of Operating Partnership..................... $ 73,678
                                                                       ========
Continuing Investors minority interest at 15.2%....................... $ 11,199
                                                                       ========
</TABLE>
 
(J) Reflects the issuance of 9,260,000 shares of Common Stock, par value $.01
    per share, at an assumed initial Offering price of $20.00 per share. The
    following table sets forth the adjustments to additional paid-in capital:
 
<TABLE>
   <S>                                                                 <C>
   . Net proceeds from the Offering of Common Stock after
     underwriting discounts and commissions and estimated issuance
     costs of $15,464................................................  $169,736
     Less: par value of Common Stock of 9,260,000 shares at $.01 par
     per share.......................................................       (93)
   . Accrued interest of $737 which will not be assumed by Kilroy
     Realty Corporation..............................................       737
   . Write-off of loan costs relating to repayment of mortgage debt..    (2,316)
   . Liability for construction costs which will not be assumed by
     Kilroy Realty Corporation.......................................       804
                                                                       --------
   Net adjustment to additional paid-in capital......................  $168,868
                                                                       ========
</TABLE>
 
(K) Reflects the reclassification of the accumulated deficit.
 
                                      F-4
<PAGE>
 
                           KILROY REALTY CORPORATION
 
     PRO FORMA CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)
 
        SIX MONTHS ENDED JUNE 30, 1996 AND YEAR ENDED DECEMBER 31, 1995
                 (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)
 
  The unaudited pro forma condensed consolidated statements of operations are
presented as if (i) the transfer of the Properties (other than the Acquisition
Properties) and business and operations of the Kilroy Group pursuant to the
Formation Transactions and (ii) the Offering and the Mortgage Loan, and the
use of proceeds thereof to repay indebtedness and purchase the Acquisition
Properties, each had occurred on January 1, 1995. Such pro forma information
is based upon the historical results of operations of the Kilroy Group for the
six months ended June 30, 1996, and the year ended December 31, 1995. This pro
forma condensed consolidated statements of operations should be read in
conjunction with the pro forma condensed consolidated balance sheet of the
Company and the historical combined financial statements and notes thereto of
the Kilroy Group and the Combined Historical Summaries of Certain Revenues and
Certain Expenses of the Acquisition Properties and notes thereto included
elsewhere in this Prospectus. Reference is also made to "The Company" and "Use
of Proceeds."
 
  The unaudited pro forma condensed consolidated statement of operations is
not necessarily indicative of what the actual results of operations of the
Company would have been assuming the Company had been formed and the
consummation of the Formation Transactions, the Offering and the Mortgage Loan
and the use of proceeds thereof, and the acquisition of the Acquisition
Properties at January 1, 1995, nor does it purport to represent the results of
operations of future periods of the Company.
 
                                      F-5
<PAGE>
 
                           KILROY REALTY CORPORATION
 
     PRO FORMA CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)
                 (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                   SIX MONTHS ENDED JUNE 30, 1996
                    --------------------------------------------------------------
                      KILROY                                          COMPANY PRO
                      GROUP    ACQUISITION    PRO FORMA    PRO FORMA     FORMA
                    HISTORICAL PROPERTIES   SUBSIDIARY(B) ADJUSTMENTS CONSOLIDATED
                    ---------- -----------  ------------- ----------- ------------
<S>                 <C>        <C>          <C>           <C>         <C>
REVENUES:
 Rental income....   $14,837     $2,663                     $  (241)A  $  17,259
 Tenant
 reimbursements...     1,658        323                                    1,981
 Parking..........       800                                                 800
 Development and
 management fees..       458                    $(458)B
 Lease termination
 fees.............
 Sale of air
 rights...........
 Other income.....        58        203                                      261
                     -------     ------         -----       -------    ---------
  Total revenues..    17,811      3,189          (458)         (241)      20,301
                     -------     ------         -----       -------    ---------
EXPENSES:
 Property
 expenses.........     2,719        552                        (624)D      2,647
 Real estate
 taxes............       518        169                          39 E        726
 General and
 administrative...       876        116                       1,207 F      2,199
 Ground lease.....       230        169                                      399
 Development and
 management
 expenses.........       485                     (485)B
 Interest
 expense..........     9,422                                 (6,115)G      3,307
 Depreciation and
 amortization.....     4,051        520(J)                                 4,571
                     -------     ------         -----       -------    ---------
  Total expenses..    18,301      1,526          (485)       (5,493)      13,849
                     -------     ------         -----       -------    ---------
 Income (loss)
 from operations
 before equity in
 income
 of subsidiaries
 and minority
 interest.........      (490)     1,663            27         5,252        6,452
 Equity in income
 of subsidiary....                                              (36)B        (36)
 Minority
 interest.........                                             (975)H       (975)
                     -------     ------         -----       -------    ---------
  Net income
   (loss)            $  (490)    $1,663         $  27       $ 4,241    $   5,441
                     =======     ======         =====       =======    =========
Average number of
 shares
 outstanding......                                                     9,260,000
                                                                       =========
Net income per
 common share(I)..                                                     $    0.59
                                                                       =========
<CAPTION>
                                    YEAR ENDED DECEMBER 31, 1995
                    ---------------------------------------------------------------
                      KILROY                                           COMPANY PRO
                      GROUP    ACQUISITION    PRO FORMA    PRO FORMA      FORMA
                    HISTORICAL PROPERTIES   SUBSIDIARY(H) ADJUSTMENTS  CONSOLIDATED
                    ---------- ------------ ------------- ------------ ------------
<S>                 <C>        <C>          <C>           <C>          <C>
REVENUES:
 Rental income....   $ 28,285    $5,082                    $   (483)A   $  32,884
 Tenant
 reimbursements...      2,746       688                                     3,434
 Parking..........      1,447                                               1,447
 Development and
 management fees..      1,156                  $(1,156)B
 Lease termination
 fees.............        100                                                 100
 Sale of air
 rights...........      4,456                                (4,456)C
 Other income.....        295       408                                       703
                    ---------- ------------ ------------- ------------ ------------
  Total revenues..     38,485     6,178         (1,156)      (4,939)       38,568
                    ---------- ------------ ------------- ------------ ------------
EXPENSES:
 Property
 expenses.........      5,376     1,352                      (1,389)D       5,339
 Real estate
 taxes............      1,139       286                          78 E       1,503
 General and
 administrative...      2,050       244                       2,095 F       4,389
 Ground lease.....        475       338                                       813
 Development and
 management
 expenses.........        737                     (737)B
 Interest
 expense..........     21,529                               (14,916)G       6,613
 Depreciation and
 amortization.....      8,313     1,039(J)                                  9,352
                    ---------- ------------ ------------- ------------ ------------
  Total expenses..     39,619     3,259           (737)     (14,132)       28,009
                    ---------- ------------ ------------- ------------ ------------
 Income (loss)
 from operations
 before equity in
 income
 of subsidiaries
 and minority
 interest.........     (1,134)    2,919           (419)       9,193        10,559
 Equity in income
 of subsidiary....                                              136 B         136
 Minority
 interest.........                                           (1,625)H      (1,625)
                    ---------- ------------ ------------- ------------ ------------
  Net income
   (loss)            $(1,134)    $2,919        $  (419)    $  7,704     $   9,070
                    ========== ============ ============= ============ ============
Average number of
 shares
 outstanding......                                                      9,260,000
                                                                       ============
Net income per
 common share(I)..                                                      $    0.98
                                                                       ============
</TABLE>
 
                                      F-6
<PAGE>
 
                           KILROY REALTY CORPORATION
 
      NOTES TO PRO FORMA CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                      (UNAUDITED) (DOLLARS IN THOUSANDS)
 
(A) Represents the elimination of rental income received from Kilroy
    Industries.
 
(B) Represents the elimination of the Services Company's gross revenues and
    expenses and the recording of the equity in income of the Services Company
    net of income taxes.
 
<TABLE>
<CAPTION>
                                                      SIX MONTHS    YEAR ENDED
                                                    ENDED JUNE 30, DECEMBER 31,
                                                         1996          1995
                                                    -------------- ------------
   <S>                                              <C>            <C>
   Development and management fees................       $458         $1,156
   Development and management expenses............       (485)          (737)
   Elimination of nonrecurring Services Company
    expenses......................................         80
                                                         ----         ------
                                                           53            419
   Elimination of management fees earned on one of
    the Acquisition Properties....................         91            181
                                                         ----         ------
                                                          (38)           238
   Income tax expense.............................                        95
                                                         ----         ------
   Estimated service company net income (loss)....        (38)           143
                                                         ----         ------
   At 95% economic interest.......................       $(36)        $  136
                                                         ====         ======
</TABLE>
 
(C) Represents the elimination of nonrecurring sale of air rights.
 
(D) Represents the elimination of management fees charged to the Kilroy Group
    by Kilroy Industries.
 
(E) Represents incremental property taxes on the Acquisition Properties due to
    change of ownership.
 
(F) Estimated incremental general and administrative expenses to be incurred
    as a public company.
 
(G) Reflects reduction of interest expenses associated with the mortgage debts
    assumed to be repaid using net proceeds from the Offering:
 
<TABLE>
<CAPTION>
                                                     SIX MONTHS    YEAR ENDED
                                                   ENDED JUNE 30, DECEMBER 31,
                                                        1996          1995
                                                   -------------- ------------
   <S>                                             <C>            <C>
   . Interest expense on the Mortgage Loan (fixed
     interest rate of 8.72% on $75,000)..........     $ 3,253       $  6,506
   . Amortization of the issuance costs on the
     Mortgage Loan...............................          54            107
   . Interest expense on debt assumed to be
     retired.....................................      (9,422)       (21,529)
                                                      -------       --------
     Net interest expense reduction..............     $(6,115)      $(14,916)
                                                      =======       ========
</TABLE>
 
(H) Represents the income allocated to the estimated 15.2% minority interest
    (Units) in the Operating Partnership owned by Continuing Investors.
 
(I) Pro forma net income per share of Common Stock is based upon 9,260,000
    shares of Common Stock assumed to be outstanding in connection with the
    Offering.
 
(J) Represents depreciation expense calculated based on the cost of the
    Aquisition Properties depreciated on the straight-line method over a 35
    year life.
 
                                      F-7
<PAGE>
 
                         INDEPENDENT AUDITORS' REPORT
 
To the Board of Directors and Stockholders of
 Kilroy Realty Corporation:
 
  We have audited the accompanying balance sheet of Kilroy Realty Corporation
(the "Company") as of September 30, 1996. This financial statement is the
responsibility of the Company's management. Our responsibility is to express
an opinion on this financial statement based on our audit.
 
  We conducted our audit in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to
obtain reasonable assurance about whether the balance sheet is free of
material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the balance sheet. An audit also
includes assessing the accounting principles used and significant estimates
made by management, as well as evaluating the overall balance sheet
presentation. We believe that our audit provides a reasonable basis for our
opinion.
 
  In our opinion, such balance sheet presents fairly, in all material
respects, the financial position of the Company at September 30, 1996 in
conformity with generally accepted accounting principles.
 
Deloitte & Touche LLP
Los Angeles, California
October 25, 1996
 
                                      F-8
<PAGE>
 
                           KILROY REALTY CORPORATION
 
                                 BALANCE SHEET
 
                               SEPTEMBER 30, 1996
 
<TABLE>
      <S>                                                                 <C>
      ASSETS
      Cash............................................................... $1,000
                                                                          ======
      STOCKHOLDER'S EQUITY
      Common Stock, $.01 par value, 10,000,000 shares authorized;
       50 shares issued and outstanding.................................. $1,000
                                                                          ======
</TABLE>
 
 
 
                          See notes to balance sheet.
 
                                      F-9
<PAGE>
 
                           KILROY REALTY CORPORATION
 
                            NOTES TO BALANCE SHEET
 
                              SEPTEMBER 30, 1996
 
1. FORMATION OF THE COMPANY
 
  Kilroy Realty Corporation (the "Company") was incorporated in Maryland on
September 13, 1996. The Company will file a Registration Statement on Form S-
11 with the Securities and Exchange Commission with respect to a proposed
public offering (the "Offering") of 9,260,000 shares of Common Stock. The
Company has been formed to succeed to the business of the Kilroy Group
consisting of a portfolio of seven office properties and nine industrial
properties (the "Kilroy Properties") and the real estate ownership,
acquisition, development, leasing and management businesses historically
conducted by Kilroy Industries and related partnerships. The Company's assets
will be owned and controlled by, and all of its operations will be conducted
through, Kilroy Realty, L.P. (the "Operating Partnership") and other
subsidiaries. The Company will control, as the sole general partner, and will
initially own an 84.8% interest in, the Operating Partnership. The Operating
Partnership will conduct certain development services through Kilroy Services,
Inc. ("Services Company"). The Operating Partnership will own 100% of the
nonvoting preferred stock representing 95% of the economic interest in the
Services Company. John B. Kilroy, Sr. and John B. Kilroy, Jr. together will
own 100% of the voting common stock. The Operating Partnership's investment in
the Services Company will be accounted for under the equity method.
 
  Prior to and simultaneous with the consummation of the Offering, the
Company, the Operating Partnership and the Kilroy Group intend to engage in
certain formation transactions (the "Formation Transactions") summarized as
follows:
 
    (i) The Kilroy Group will contribute all of their interests in the Kilroy
  Properties to the Operating Partnership in exchange for units representing
  limited partnership interests in the Operating Partnership ("Units");
 
    (ii) The Company will sell shares of Common Stock in the Offering and
  will contribute the net proceeds from the Offering (estimated to be
  approximately $169.7 million) to the Operating Partnership in exchange for
  Units in the Operating Partnership. The Operating Partnership will use
  substantially all of such net proceeds, together with the net proceeds of
  borrowings under the Mortgage Loan, discussed below, for the repayment of
  certain existing mortgage and loan indebtedness on the Kilroy Properties,
  and the acquisition of certain properties (the "Acquisition Properties");
 
    (iii) The Operating Partnership will enter into an $75 million secured
  mortgage financing (the "Mortgage Loan"), which will be a recourse
  obligation of the Operating Partnership; and
 
    (iv) The Company will amend its charter and authorize 150,000,000 shares
  of Common Stock, $.01 par value per share, and 30,000,000 shares of
  Preferred Stock, par value $.01 per share.
 
2. INCOME TAXES
 
  It is the intent of the Company to qualify as a real estate investment trust
("REIT") under the Internal Revenue Code of 1986, as amended. As a REIT, the
Company generally will not be subject to federal income tax to the extent that
it distributes at least 95% of its REIT taxable income to its stockholders.
REITs are subject to a number of organizational and operational requirements.
If the Company fails to qualify as a REIT in any taxable year, the Company
will be subject to federal income tax (including any applicable alternative
minimum tax) on its taxable income at regular corporate tax rates.
 
3. OFFERING COSTS
 
  In connection with the Offering, affiliates have or will incur legal,
accounting and related costs which will be reimbursed by the Company upon the
consummation of the Offering. These costs will be deducted from the gross
proceeds of the Offering.
 
                                     F-10
<PAGE>
 
                           KILROY REALTY CORPORATION
 
                      NOTES TO BALANCE SHEET--(CONTINUED)
 
                              SEPTEMBER 30, 1996
 
4. STOCK INCENTIVE PLAN
 
  Prior to the consummation of the Offering, the Company intends to adopt and
have its shareholders approve a stock incentive plan (the "Stock Incentive
Plan"), for the purpose of attracting and retaining executive officers,
directors and employees. A maximum of 1,000,000 shares of Common Stock
(subject to adjustment) will be reserved by the Company for issuance under the
Stock Option Plan. The exercise price may not be less than the market value of
the Common Stock on the date of the grant.
 
 
                                    ******
 
                                     F-11
<PAGE>
 
                         INDEPENDENT AUDITORS' REPORT
 
To the Partners of Kilroy Group:
 
  We have audited the accompanying combined balance sheets of Kilroy Group
(described in Note 1) as of December 31, 1995 and 1994, and the related
combined statements of operations, accumulated deficit, and cash flows for
each of the three years in the period ended December 31, 1995. These financial
statements are the responsibility of the management of Kilroy Group. Our
responsibility is to express an opinion on these financial statements based on
our audits.
 
  We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform our audits to
obtain reasonable assurance about whether the financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements. An audit
also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.
 
  In our opinion, such financial statements present fairly, in all material
respects, the financial position of Kilroy Group as of December 31, 1995 and
1994, and the results of its operations and its cash flows for each of the
three years in the period ended December 31, 1995 in conformity with generally
accepted accounting principles.
 
Deloitte & Touche LLP
Los Angeles, California
September 20, 1996
 
                                     F-12
<PAGE>
 
                                  KILROY GROUP
 
                            COMBINED BALANCE SHEETS
 
            JUNE 30, 1996 (UNAUDITED) AND DECEMBER 31, 1995 AND 1994
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                             DECEMBER 31,
                                               JUNE 30,   --------------------
                                                 1996       1995       1994
                                              ----------- ---------  ---------
                                              (UNAUDITED)
<S>                                           <C>         <C>        <C>
                   ASSETS
RENTAL PROPERTIES (Notes 1, 2, 4, 5, 6 and
 9):
  Land.......................................  $ 12,490   $  12,490  $  12,490
  Buildings and improvements.................   180,620     179,254    178,230
                                               --------   ---------  ---------
    Total rental properties..................   193,110     191,744    190,720
  Accumulated depreciation and amortization..   (82,790)    (79,251)   (71,924)
                                               --------   ---------  ---------
    Rental properties, net...................   110,320     112,493    118,796
TENANT RECEIVABLES, NET (Note 2).............     3,892       3,642      3,590
DEFERRED CHARGES AND OTHER ASSETS, NET
 (Notes 2, 3 and 7)..........................     7,613       5,036      8,238
                                               --------   ---------  ---------
TOTAL........................................  $121,825   $ 121,171  $ 130,624
                                               ========   =========  =========
     LIABILITIES AND ACCUMULATED DEFICIT
LIABILITIES:
  Debt (Notes 4, 8 and 9)....................  $204,601   $ 206,858  $ 222,038
  Accounts payable and accrued expenses......     2,029       2,409      3,210
  Accrued construction costs (Note 2)........       804         874
  Accrued property taxes (Note 2)............       220       1,399      1,563
  Property tax refund payable to tenants
   (Note 3)..................................                            1,500
  Accrued interest payable (Note 4)..........     1,380       4,731      6,471
  Rents received in advance and tenant
   security deposits.........................     8,074       8,030      8,105
                                               --------   ---------  ---------
    Total liabilities........................   217,108     224,301    242,887
COMMITMENTS AND CONTINGENCIES (Note 6).......
ACCUMULATED DEFICIT (Note 1).................   (95,283)   (103,130)  (112,263)
                                               --------   ---------  ---------
TOTAL........................................  $121,825   $ 121,171  $ 130,624
                                               ========   =========  =========
</TABLE>
 
 
 
                  See notes to combined financial statements.
 
                                      F-13
<PAGE>
 
                                  KILROY GROUP
 
                       COMBINED STATEMENTS OF OPERATIONS
 
            SIX MONTHS ENDED JUNE 30, 1996 AND 1995 (UNAUDITED) AND
                  YEARS ENDED DECEMBER 31, 1995, 1994 AND 1993
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                     SIX MONTHS
                                   ENDED JUNE 30,         DECEMBER 31,
                                   ----------------  -------------------------
                                    1996     1995     1995     1994     1993
                                   -------  -------  -------  -------  -------
                                     (UNAUDITED)
<S>                                <C>      <C>      <C>      <C>      <C>
REVENUES (Notes 2 and 5):
 Rental income (Note 7)........... $14,837  $13,949  $28,285  $27,518  $29,139
 Tenant reimbursements (Note 3)...   1,658    1,275    2,746    1,549    3,507
 Parking..........................     800      727    1,447    1,216    1,205
 Development and management fees..     458      695    1,156      919      751
 Sale of air rights (Note 2)......                     4,456
 Other income (Note 3)............      58       52      395    1,077      174
                                   -------  -------  -------  -------  -------
   Total revenues.................  17,811   16,698   38,485   32,279   34,776
                                   -------  -------  -------  -------  -------
EXPENSES:
 Property expenses (Notes 2 and
  7)..............................   2,719    2,571    5,376    4,674    4,320
 Real estate taxes (Note 3).......     518      670    1,139     (929)   2,500
 General and administrative.......     876      881    2,050    2,406    1,033
 Ground leases (Note 6)...........     230      216      475      591      772
 Development and management
  expenses........................     485      384      737      468      581
 Interest expense.................   9,422   11,813   21,529   22,739   23,151
 Depreciation and amortization....   4,051    4,013    8,313    8,740    8,990
                                   -------  -------  -------  -------  -------
   Total expenses.................  18,301   20,548   39,619   38,689   41,347
                                   -------  -------  -------  -------  -------
LOSS BEFORE EXTRAORDINARY GAINS...    (490)  (3,850)  (1,134)  (6,410)  (6,571)
EXTRAORDINARY GAINS
 (Note 4).........................  12,887            15,267    1,847
                                   -------  -------  -------  -------  -------
NET INCOME (LOSS)................. $12,397  $(3,850) $14,133  $(4,563) $(6,571)
                                   =======  =======  =======  =======  =======
</TABLE>
 
 
 
                  See notes to combined financial statements.
 
                                      F-14
<PAGE>
 
                                  KILROY GROUP
 
                   COMBINED STATEMENTS OF ACCUMULATED DEFICIT
 
                YEARS ENDED DECEMBER 31, 1995, 1994 AND 1993 AND
                   SIX MONTHS ENDED JUNE 30, 1996 (UNAUDITED)
                                 (IN THOUSANDS)
 
<TABLE>
<S>                                                                   <C>
BALANCE, JANUARY 1, 1993............................................. $(86,372)
  Deemed and actual distributions to partners, net of contributions..   (4,200)
  Net loss...........................................................   (6,571)
                                                                      --------
BALANCE, DECEMBER 31, 1993...........................................  (97,143)
  Deemed and actual distributions to partners, net of contributions..  (10,557)
  Net loss...........................................................   (4,563)
                                                                      --------
BALANCE, DECEMBER 31, 1994........................................... (112,263)
  Deemed and actual distributions to partners, net of contributions..   (5,000)
  Net income.........................................................   14,133
                                                                      --------
BALANCE, DECEMBER 31, 1995........................................... (103,130)
  Deemed and actual distributions to partners, net of contributions
   (Unaudited).......................................................   (4,550)
  Net income (Unaudited).............................................   12,397
                                                                      --------
BALANCE, JUNE 30, 1996 (Unaudited)................................... $(95,283)
                                                                      ========
</TABLE>
 
 
                  See notes to combined financial statements.
 
                                      F-15
<PAGE>
 
                                  KILROY GROUP
 
                       COMBINED STATEMENTS OF CASH FLOWS
 
            SIX MONTHS ENDED JUNE 30, 1996 AND 1995 (UNAUDITED) AND
                  YEARS ENDED DECEMBER 31, 1995, 1994 AND 1993
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                   SIX MONTHS
                                     ENDED
                                    JUNE 30,             DECEMBER 31,
                                -----------------  ---------------------------
                                  1996     1995      1995      1994     1993
                                --------  -------  --------  --------  -------
                                  (UNAUDITED)
<S>                             <C>       <C>      <C>       <C>       <C>
CASH FLOWS FROM OPERATING
 ACTIVITIES:
 Net income (loss)............. $ 12,397  $(3,850) $ 14,133  $ (4,563) $(6,571)
 Adjustment to reconcile net
  income (loss) to net cash
  provided by (used in)
  operating activities:
  Depreciation and
   amortization................    4,051    4,013     8,313     8,740    8,990
  Net (increase) decrease:
   Provision for bad debts.....      365      546     1,103       866      317
   Extraordinary gains.........  (12,887)           (15,267)   (1,847)
  Changes in assets and
   liabilities:
   Tenant receivables..........     (615)    (520)   (1,157)     (565)    (665)
   Deferred charges and other
    assets, net ...............     (776)   3,132     2,218    (3,103)     219
   Accounts payable and accrued
    expenses...................     (380)    (413)       73       713     (202)
   Accrued construction costs..      (70)               874
   Accrued property taxes......   (1,178)    (607)     (164)   (2,411)   1,677
   Property tax refund payable
    to tenants.................            (1,500)   (1,500)    1,500
   Accrued interest payable....      (64)     349      (473)    1,496      946
   Rents received in advance
    and tenant security
    deposits...................       43       70      (949)    6,257      443
                                --------  -------  --------  --------  -------
    Net cash provided by
     operating activities......      886    1,220     7,204     7,083    5,154
                                --------  -------  --------  --------  -------
CASH FLOWS FROM INVESTING
 ACTIVITIES:
 Expenditures for rental
  properties...................   (1,366)    (434)   (1,024)   (1,642)    (463)
 Reimbursement of tenant
  improvements.................                                          2,661
                                --------  -------  --------  --------  -------
    Net cash (used in) provided
     by investing activities...   (1,366)    (434)   (1,024)   (1,642)   2,198
                                --------  -------  --------  --------  -------
CASH FLOWS FROM FINANCING
 ACTIVITIES:
 Net proceeds received from
  debt.........................   20,410      489       752    11,127    6,788
 Principal payments on debt....  (15,380)    (794)   (1,932)   (6,011)  (9,940)
 Deemed and actual
  distributions to partners....   (4,550)    (481)   (5,000)  (10,557)  (4,200)
                                --------  -------  --------  --------  -------
    Net cash (used in) provided
     by financing activities... $    480  $  (786) $ (6,180) $ (5,441) $(7,352)
                                ========  =======  ========  ========  =======
SUPPLEMENTAL CASH FLOW
 INFORMATION:
 Cash paid during the period
  for interest................. $  8,844  $11,385  $ 19,306  $ 21,152  $21,421
                                ========  =======  ========  ========  =======
</TABLE>
 
                  See notes to combined financial statements.
 
                                      F-16
<PAGE>
 
                                 KILROY GROUP
 
                    NOTES TO COMBINED FINANCIAL STATEMENTS
 
            SIX MONTHS ENDED JUNE 30, 1996 AND 1995 (UNAUDITED) AND
                 YEARS ENDED DECEMBER 31, 1995, 1994 AND 1993
 
1. ORGANIZATION AND BASIS OF PRESENTATION
 
  Organization--Kilroy Group (not a legal entity) consists of the combination
of general and limited partnerships and trusts, all of which were under common
control and management of Kilroy Industries ("KI"), its stockholders, or
executive officers. The entities referred to collectively as Kilroy Group
("KG") are engaged in the acquisition, development, ownership and operation of
16 office and industrial properties (the "Kilroy Properties") located in
California and Arizona. KI has historically provided acquisition, financing,
construction and leasing services with respect to the Kilroy Properties. KI
has also provided development services to third-party owners of properties for
a fee.
 
  The names and locations of the Kilroy Properties are as follows:
 
<TABLE>
<CAPTION>
                    PROPERTY                        LOCATION
                    --------                        --------
      <S>                                   <C>
      OFFICE:
      Kilroy Airport Center at El Segundo:
        2240 E. Imperial Highway            El Segundo, California
        2250 E. Imperial Highway            El Segundo, California
        2260 E. Imperial Highway            El Segundo, California
      Kilroy Airport Center Long Beach:
        3750 Kilroy Airport Way             Long Beach, California
        3760 Kilroy Airport Way             Long Beach, California
        3780 Kilroy Airport Way             Long Beach, California
      185/181 S. Douglas Street             El Segundo, California
      INDUSTRIAL:
      2031 E. Mariposa Avenue               El Segundo, California
      3332 E. La Palma Avenue               Anaheim, California
      2260 E. El Segundo Boulevard          El Segundo, California
      2265 E. El Segundo Boulevard          El Segundo, California
      2270 E. El Segundo Boulevard          El Segundo, California
      5115 N. 27th Avenue                   Phoenix, Arizona
      1000 E. Ball Road                     Anaheim, California
      1230 S. Lewis Street                  Anaheim, California
      12681/12691 Pala Drive                Garden Grove, California
</TABLE>
 
  Basis of Presentation--The accompanying combined financial statements of KG
have been presented on a combined basis because of the common ownership and
management and because the entities are expected to be the subject of a
business combination with Kilroy Realty Corporation (the "Company"), a
recently formed Maryland corporation which is expected to qualify as a real
estate investment trust under the Internal Revenue Code of 1986, as amended.
Concurrently with the business combination, the Company intends to raise
capital through an initial public offering of Common Stock, a debt offering
and a credit facility to be secured by mortgage liens on the properties. The
business combination has been structured to allow the partners of KG to
receive limited partnership interests in Kilroy Realty, L.P. (the "Operating
Partnership"). The Company will be the managing general partner of the
Operating Partnership, which will hold the operating assets and will manage
the Kilroy Properties. Certain other properties and operations affiliated with
KI have been excluded as they are not compatible with the investment purposes
of the Company. Deemed and actual cash distributions to partners,
 
                                     F-17
<PAGE>
 
                                 KILROY GROUP
 
              NOTES TO COMBINED FINANCIAL STATEMENTS--(CONTINUED)
net of contributions, included in the combined statements of accumulated
deficit generally represent distributions of the cash flows generated by KG,
and advances to partners and KI, as well as related-party transactions (see
Note 7).
 
 Unaudited Financial Statements--The combined financial statements including
the note disclosures included herein as of June 30, 1996 and for the six
months ended June 30, 1996 and 1995 are unaudited; however, in the opinion of
management, all adjustments (consisting solely of normal recurring
adjustments) necessary for a fair presentation of the combined financial
statements for these interim periods have been included. The results for the
interim period ended June 30, 1996 are not necessarily indicative of the
results to be obtained for the full fiscal year.
 
2. SIGNIFICANT ACCOUNTING POLICIES
 
  Rental Properties--Rental properties are stated at historical cost less
accumulated depreciation, which, in the opinion of KG's management, is not in
excess of net realizable value. Net realizable value does not purport to
represent fair market value. Costs incurred for the acquisition, renovation
and betterment of the properties are capitalized. Maintenance and repairs are
charged to expense as incurred.
 
  The Company reviews the recoverability of real estate assets to determine if
there has been any impairment. This assessment is performed based on the
estimated undiscounted cash flows from operating activities compared with the
carrying value of real estate assets. If the future cash flows (undiscounted
and without interest charges) are less than the carrying value, a writedown
would be recorded to reduce the related asset to its estimated fair value.
 
  Depreciation and Amortization--The cost of buildings and improvements are
depreciated on the straight-line method over estimated useful lives, as
follows:
 
  Buildings--25 to 40 years
  Tenant improvements--shorter of lease term or useful lives ranging from 5
  to 20 years
 
  Deferred Charges--Deferred charges include deferred leasing costs and loan
fees. Leasing costs include leasing commissions that are amortized on the
straight-line basis over the initial lives of the leases, which range from 5
to 10 years. Deferred loan fees are amortized on a straight-line basis over
the terms of the respective loans, which approximates the effective interest
method.
 
  Accrued Property Taxes--As of June 30, 1996 and December 31, 1995 and 1994,
$220,000, $534,000 and $621,000, respectively, of accrued property taxes were
past due.
 
  Revenue Recognition and Tenant Receivables--Leases with tenants are
accounted for as operating leases. Minimum annual rentals are recognized on a
straight-line basis over the lease term. Unbilled deferred rent represents the
amount that expected straight-line rental income exceeds rents currently due
under the lease agreement. Total tenant receivables consists of the following
amounts:
 
<TABLE>
<CAPTION>
                                                        JUNE     DECEMBER 31,
                                                         30,    ---------------
                                                        1996     1995     1994
                                                       -------  -------  ------
                                                           (IN THOUSANDS)
   <S>                                                 <C>      <C>      <C>
   Tenant rent and reimbursements receivable.......... $ 3,500  $ 2,893  $1,774
   Allowance for uncollectible rent...................  (2,158)  (1,793)   (835)
   Unbilled deferred rent.............................   2,550    2,542   2,651
                                                       -------  -------  ------
   Tenants receivables, net........................... $ 3,892  $ 3,642  $3,590
                                                       =======  =======  ======
</TABLE>
 
 
                                     F-18
<PAGE>
 
                                 KILROY GROUP
 
              NOTES TO COMBINED FINANCIAL STATEMENTS--(CONTINUED)
  Included in tenant rent and reimbursements receivable are additional rentals
based on common area maintenance expenses and certain other expenses that are
accrued in the period in which the related expenses are incurred.
 
  Use of Estimates--The preparation of financial statements in conformity with
generally accepted accounting principles requires management to make estimates
and assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.
 
  Parking--The Kilroy Airport Center--LAX includes parking facilities. KG
records as revenue the gross parking receipts. KG contracts with parking
management companies to operate the parking facilities, and such contract
costs are included in property expenses.
 
  Development Services--Development and management fees represent fees earned
by KG for supervision services provided for building development and
management of nonowned properties. Fees are typically a percentage of total
development costs plus reimbursement for certain expenses. Unreimbursed
expenses are recorded as development expenses and include items such as wages,
equipment rental, supplies, etc.
 
  Sale of Air Rights--In 1995, based on an agreement between KG and the
California Transportation Commission, KG received $4,456,000, net of related
expenses, for granting temporary construction and permanent air right
easements over a portion of its property for the construction of a freeway on-
ramp. In connection with this transaction, KG accrued $874,000 for the costs
of restoration of the property after construction of the on-ramp.
 
3. DEFERRED CHARGES AND OTHER ASSETS
 
  Deferred charges and other assets are summarized as follows:
 
<TABLE>
<CAPTION>
                                                       JUNE     DECEMBER 31,
                                                        30,    ----------------
                                                       1996     1995     1994
                                                      -------  -------  -------
                                                          (IN THOUSANDS)
   <S>                                                <C>      <C>      <C>
   Deferred assets:
     Deferred financing costs........................ $ 2,407  $ 3,333  $ 3,468
     Deferred leasing costs (Note 7).................  10,091   10,382   10,023
                                                      -------  -------  -------
       Total deferred assets.........................  12,498   13,715   13,491
   Accumulated amortization..........................  (5,250)  (9,425)  (8,951)
                                                      -------  -------  -------
   Deferred assets, net..............................   7,248    4,290    4,540
   Prepaid expenses..................................     365      746      878
   Property tax refunds receivable...................                     2,820
                                                      -------  -------  -------
       Total deferred charges and other assets....... $ 7,613  $ 5,036  $ 8,238
                                                      =======  =======  =======
</TABLE>
 
  Property tax refunds, which were collected in 1995, relate to appeals filed
by KG in the fourth quarter of 1994 for refunds of property taxes paid in 1990
through 1994 and include related interest income of $441,000. Such amounts
were recorded as a reduction of property taxes and as other income during the
year ended December 31, 1994. Of these property tax recoveries, approximately
$1,500,000 was refunded to tenants of the related properties and has been
recorded as a reduction to tenant reimbursements income during the year ended
December 31, 1994.
 
 
                                     F-19
<PAGE>
 
                                 KILROY GROUP
 
              NOTES TO COMBINED FINANCIAL STATEMENTS--(CONTINUED)
4. DEBT
 
  Debt consists of the following:
 
<TABLE>
<CAPTION>
                                                                 DECEMBER 31,
                                                      JUNE 30, -----------------
                                                        1996     1995     1994
                                                      -------- -------- --------
                                                            (IN THOUSANDS)
   <S>                                                <C>      <C>      <C>
   Bank notes payable, due in December 1994, bearing
    interest at prime (8.5% at December 31,
    1995)(a)........................................  $        $  9,700 $ 23,700
   Bank notes payable, due in January 1999, bearing
    interest at LIBOR + 1.15% (6.9% at December 31,
    1995)...........................................    56,009   54,811   54,186
   Notes payable to finance company and related
    pension funds, maturing in 1997 and 1998,
    bearing interest at rates from 8.5% to
    12.7%(b)........................................    28,623   33,447   33,705
   Notes payable to insurance companies, maturing
    March 2006, bearing interest at 9.5%............     2,021   10,722   11,170
   Note payable to insurance company due April 2002,
    bearing interest at 9.25%(c)....................    95,546   97,283   98,347
   Notes payable to underwriter due in June 1997,
    bearing
    interest at LIBOR + 3% (8.46% at June 30,
    1996)(d)........................................    21,525
   Bank notes payable, due in July 2008, bearing
    interest at 10%.................................       877      895      930
                                                      -------- -------- --------
                                                      $204,601 $206,858 $222,038
                                                      ======== ======== ========
</TABLE>
- --------
(a) In September 1995, a note payable to a bank of $14,000,000 due in December
    1994 and accrued interest payable of $3,867,000 was retired by a cash
    payment of $2,600,000. KG recorded an extraordinary gain of $15,267,000 as
    a result of this transaction. The remaining notes payable of $9,700,000
    were in default as of December 31, 1995 and 1994. Past due interest on the
    remaining notes, approximately $3,107,000 and $2,903,000 at March 31, 1996
    and December 31, 1995, respectively, is included in accrued interest. See
    discussion below regarding settlement of this loan.
(b) During the six months ended June 30, 1996, three of the notes payable
    totaling $16,608,000 were amended to extend the maturity dates from 1996
    to 1997 and 1998. In May, 1996, an additional note with a principal
    balance of $2,500,000 which was due in February 1996 and was amended to
    extend the maturity date from February 1996 to 1997. During June 1996,
    notes payable of $5,765,000 were amended to extend the maturity date from
    June 1996 to April 1998.
(c) Under an agreement with the insurance company, monthly payments of
    principal and interest are calculated based on gross receipts from leases
    of the property that secures the loan. All receipts from the property are
    deposited into a lock box account from which all operating costs, which
    must be approved by the lender, are to be paid. Monthly installments of
    principal and interest of $881,475 and property taxes are payable from the
    lockbox account and any deficiency must be funded by KG. There are certain
    provisions in the agreement that may require additional payments of
    principal.
(d) On June 20, 1996, KG obtained a mortgage loan of $21,525,000 from one of
    the underwriters of the proposed public offering of common stock referred
    to in Note 1. Such loan is due on June 20, 1997 and bears interest at 3%
    above LIBOR. At any time prior to October 15, 1996, KG can (subject to
    certain conditions) convert the loan to a 10 year loan with a 25 year
    amortization with interest at LIBOR plus 2.75%. Fees of $2,279,000 were
    incurred in connection with obtaining this loan. An additional fee of
    $337,500 is payable if the loan is not repaid within 150 days. The
    proceeds were used to pay: $100,000 as settlement of bank notes with an
    aggregate principal balance of $9,700,000 and $3,287,000 of unpaid
    interest, a note payable to an insurance company with a principal balance
    of $8,549,000 and a note payable to finance company with a principal
    balance of $4,600,000. The forgiveness of $12,887,000, has been recorded
    as an extraordinary gain.
 
                                     F-20
<PAGE>
 
                                 KILROY GROUP
 
              NOTES TO COMBINED FINANCIAL STATEMENTS--(CONTINUED)
 
  In 1994, two notes payable to insurance companies, with an aggregate unpaid
balance of $6,782,000 were paid after forgiveness of $1,847,000 of principal
by the lenders, which has been recorded as an extraordinary gain.
 
  The notes payable are secured by deeds of trust on all Kilroy Properties and
the assignment of certain rents and leases associated with the related
properties. The notes are generally due in monthly installments of principal
and interest or interest only. Approximately $34.8 million of notes payable
are guaranteed by certain members of KG. Several notes contain restrictive
covenants with which KG has complied as well as penalties for early repayment
of principal equal to a percentage of the unpaid balance.
 
  Aggregate future principal payments on notes payable are as follows:
 
<TABLE>
<CAPTION>
                                                           JUNE 30, DECEMBER 31,
     YEAR ENDING                                             1996       1995
     -----------                                           -------- ------------
                                                              (IN THOUSANDS)
     <S>                                                   <C>      <C>
      1996................................................ $  3,796   $  4,301
      1997................................................   42,113     42,936
      1998................................................    9,874     10,626
      1999................................................   58,542     57,301
      2000................................................    2,779      2,722
      Thereafter..........................................   87,497     88,972
                                                           --------   --------
        Total............................................. $204,601   $206,858
                                                           ========   ========
</TABLE>
 
5. FUTURE MINIMUM RENT
 
  KG has operating leases with tenants that expire at various dates through
2005 and are either subject to scheduled fixed increases or adjustments based
on the Consumer Price Index. Generally, the leases grant tenants renewal
options. Leases also provide for additional rents based on certain operating
expenses as well as sales volume of certain retail space within the office
buildings. Future minimum rent to be received under operating leases,
excluding tenant reimbursements of certain costs, as of December 31, 1995:
 
<TABLE>
<CAPTION>
     YEAR ENDING
     -----------                                                  (IN THOUSANDS)
     <S>                                                          <C>
      1996.......................................................    $32,193
      1997.......................................................      27,070
      1998.......................................................      24,996
      1999.......................................................      21,487
      2000.......................................................      18,686
      Thereafter.................................................      55,047
                                                                     --------
        Total....................................................    $179,479
                                                                     ========
</TABLE>
 
  Rental income from one tenant, Hughes Electronic Corporation's Space &
Communications Company ("Hughes"), was $4,261,000, $10,817,000, $11,395,000
and $12,258,000 for the six months ended June 30, 1996 and in 1995, 1994 and
1993, respectively. Future minimum rents from this tenant are $66,949,000 at
December 31, 1995.
 
  On September 18, 1996, KG and Hughes amended the terms of certain of their
lease agreements. Such amendments included the extension of one lease through
October 31, 2001 and a $500,000 allowance for tenant improvements to be paid
by KG not later than November 1, 1996. In addition, KG agreed to pay Hughes
not later than November 1, 1996 $3.15 million in consideration for the
cancellation of an option to purchase a 50% equity interest in Kilroy Airport
Center at El Segundo.
 
                                     F-21
<PAGE>
 
                                 KILROY GROUP
 
              NOTES TO COMBINED FINANCIAL STATEMENTS--(CONTINUED)
 
  The majority of Kilroy Properties are located in Southern California. The
ability of the tenants to honor the terms of their respective leases is
dependent upon the economic, regulatory and social factors affecting the
communities and industries in which the tenants operate.
 
6. COMMITMENTS AND CONTINGENCIES
 
  Guarantee--Pursuant to the terms of a promissory note for a related entity,
one of the Kilroy Properties, the rents received from it, and the personal
property located on or used in connection with it are held as collateral for
the loan up to a maximum of $2,000,000.
 
  Operating Leases--KG has noncancelable ground lease obligations on Kilroy
Airport Center--Long Beach with an initial lease period expiring on July 31,
2035, classified as an operating lease. KG has an option for four lease
extensions of ten years each and a final lease extension of nine years. The
minimum commitment under this lease at December 31, 1995 is as follows:
 
<TABLE>
<CAPTION>
     YEAR ENDING
     -----------                                                  (IN THOUSANDS)
     <S>                                                          <C>
      1996.......................................................    $   447
      1997.......................................................        447
      1998.......................................................        465
      1999.......................................................        627
      2000.......................................................        760
      Thereafter.................................................     26,294
                                                                     -------
        Total....................................................    $29,040
                                                                     =======
</TABLE>
 
  Litigation--KG is subject to various legal proceedings and claims that arise
in the ordinary course of business. These matters are generally covered by
insurance. While the resolution of these matters cannot be predicted with
certainty, management believes that the final outcome of such matters will not
have a material adverse effect on the financial position or results of
operations of KG.
 
7. RELATED-PARTY TRANSACTIONS
 
  KI provides management, legal, accounting and general administrative
services pursuant to agreements that provide for management fees based upon a
percentage of gross revenues from the Kilroy Properties and reimbursement of
other costs incurred by KI in connection with providing the aforementioned
services. Kilroy Company ("KC"), an affiliated entity, provides marketing and
leasing services. Charges by KC include leasing commissions paid to employees
and outside leasing brokers as well as fees to cover its general
administrative costs. Management fees are expensed as incurred and are
included in property expenses. Leasing fees are capitalized and amortized over
the life of the related leases. In the opinion of KG management, the fees paid
to KI and KC for management and leasing services are comparable to the rates
which KG would have paid an independent company to provide similar services.
In addition, KI is a tenant at the Kilroy Airport Center--LAX and Kilroy
Airport Center--Long Beach, under month-to-month leases. Charges for services
provided by KI and KC and rental income from KI are summarized as follows:
 
<TABLE>
<CAPTION>
                                                 SIX MONTHS
                                                    ENDED
                                                -------------
                                                                  YEAR ENDED
                                                  JUNE 30,       DECEMBER 31,
                                                ------------- ------------------
                                                 1996   1995   1995   1994  1993
                                                ------ ------ ------ ------ ----
                                                         (IN THOUSANDS)
<S>                                             <C>    <C>    <C>    <C>    <C>
Management fees................................ $  583 $  432 $1,208 $  904 $997
Leasing fees................................... $1,073 $1,106 $  910 $1,280 $397
Rental income.................................. $  241 $  242 $  483 $  483 $672
</TABLE>
 
 
                                     F-22
<PAGE>
 
                                 KILROY GROUP
 
              NOTES TO COMBINED FINANCIAL STATEMENTS--(CONTINUED)
  Management fees in 1995 include a fourth quarter charge of $321,000 relating
to management time incurred for the renegotiation of loans.
 
8. FAIR VALUE DISCLOSURES OF FINANCIAL INSTRUMENTS
 
  The following disclosure of estimated fair value was determined by KG using
available market information and appropriate valuation methodologies. However,
considerable judgment is necessary to interpret market data and develop the
related estimates of fair value. Accordingly, the estimates presented herein
are not necessarily indicative of the amounts that could be realized upon
disposition of the financial instruments. The use of different market
assumptions and/or estimation methodologies may have a material effect on the
estimated fair value amounts.
 
  Receivables, accounts payable and other liabilities are carried at amounts
that reasonably approximate their fair value.
 
  The fixed rate mortgage notes payable totaling $142,348,000 and $144,153,000
as of December 31, 1995 and 1994 have fair values of $144,601,000 and
$146,320,000, respectively (excluding prepayment penalties), as estimated
based upon interest rates available for the issuance of debt with similar
terms and remaining maturities. These notes were subject to prepayment
penalties of $235,000 and $245,000 at December 31, 1995 and 1994,
respectively, that would be required to retire these notes prior to maturity.
The carrying values of floating rate mortgages totaling $64,510,000 and
$77,885,000 at December 31, 1995 and 1994, respectively, reasonably
approximate their fair values.
 
  The fair value estimates presented herein are based on information available
to KG management as of December 31, 1995 and 1994. Although KG management is
not aware of any factors that would significantly affect the estimated fair
value amounts, such amounts have not been comprehensively revalued for
purposes of these financial statements since that date, and current estimates
of fair value may differ significantly from the amounts presented herein.
 
                                     F-23
<PAGE>
 
                                 KILROY GROUP
 
              NOTES TO COMBINED FINANCIAL STATEMENTS--(CONTINUED)
 
9. SCHEDULE OF RENTAL PROPERTY
 
<TABLE>
<CAPTION>
                                                               DECEMBER 31, 1995
                     ------------------------------------------------------------------------------------------------------
                                                                             GROSS AMOUNTS
                                                                     AT WHICH CARRIED AT CLOSE OF
                                      INITIAL COST         COSTS                PERIOD
                                  --------------------  CAPITALIZED  -----------------------------
                                           BUILDINGS   SUBSEQUENT TO                                              DATE OF
                                              AND      ACQUISITION/          BUILDING AND          ACCUMULATED  ACQUIS. (A)
      PROPERTY       ENCUMBRANCES  LAND   IMPROVEMENTS  IMPROVEMENT   LAND   IMPROVEMENTS  TOTAL   DEPRECIATION CONSTR. (C)
      --------       ------------ ------- ------------ ------------- ------- ------------ -------- ------------ -----------
                                                                 (IN THOUSANDS)
<S>                  <C>          <C>     <C>          <C>           <C>     <C>          <C>      <C>          <C>
Kilroy Airport
Center
El Segundo, CA.....     $97,283   $ 6,141    $69,195      $18,884    $ 6,141    $88,079    $94,220   $42,495      1983(C)
Kilroy Airport
Center
Long Beach, CA.....      54,811               47,387       11,041                58,428     58,428    15,322      1989(C)
185/181 S. Douglas
Street
El Segundo,
California(1)......      15,639       525      4,687        1,845        628      6,429      7,057     3,509      1978(C)
2270 E. El Segundo
Boulevard
El Segundo,
California(1)......                   361        100           76        419        118        537        73      1977(C)
2260 E. El Segundo
Boulevard,
El Segundo,
California(1)......                 1,423      4,194        1,236      1,703      5,150      6,853     2,914      1979(C)
2031 E. Mariposa
Avenue,
El Segundo,
California.........      12,000       132        867        2,668        132      3,535      3,667     2,328      1954(C)
3332 E. La Palma
Avenue,
El Segundo,
California.........       7,683        67      1,521        2,851         67      4,372      4,439     3,028      1987(A)
2265 E. El Segundo
Boulevard,
El Segundo,
California.........       4,600     1,352      2,028          644      1,570      2,454      4,024     1,550      1978(C)
5115 N. 27th
Avenue,
Phoenix, Arizona...       3,000       125      1,206          (27)       126      1,178      1,304     1,168      1962(C)
1000 E. Ball Road,
Anaheim,
California(2)......       5,846       838      1,984          719        838      2,703      3,541     1,563      1979(A)(3)
1230 S. Lewis
Street,
Anaheim,
California(2)......                   395      1,489        1,994        395      3,483      3,878     2,444      1982(C)
12681/12691 Pala
Drive,
Garden Grove,
California.........       5,996       471      2,115        1,210        471      3,325      3,796     2,857      1980(A)
                       --------   -------   --------      -------    -------   --------   --------   -------
   Total...........    $206,858   $11,830   $136,773      $43,141    $12,490   $179,254   $191,744   $79,251
                       ========   =======   ========      =======    =======   ========   ========   =======
</TABLE>
- ----
(1) Two notes payable of $8,639,000 and $7,000,000 are secured by the
    buildings located at 2260 and 2270 E. El Segundo Boulevard, El Segundo,
    California, and the buildings located at 185/181 S. Douglas Street, El
    Segundo, California.
(2) A note payable of $5,846,000 is secured by the buildings located at 1000
    East Ball Road, Anaheim, California and 1230 South Lewis Street, Anaheim,
    California .
(3) The Property located at 1000 E. Ball Road, Anaheim, California, was
    developed for a third party by the Company in 1956, and acquired by the
    Company in 1979.
 
                                      F-24
<PAGE>
 
                                  KILROY GROUP
 
              NOTES TO COMBINED FINANCIAL STATEMENTS--(CONTINUED)
 
  The aggregate gross cost of property included above, for federal income tax
purposes, approximated $171,294,000 as of December 31, 1995.
 
  The following table reconciles the historical cost of the Kilroy Properties
from January 1, 1993 to December 31, 1995:
 
<TABLE>
<CAPTION>
                                                     YEAR ENDED DECEMBER 31,
                                                    --------------------------
                                                      1995     1994     1993
                                                    -------- -------- --------
                                                          (IN THOUSANDS)
   <S>                                              <C>      <C>      <C>
   Balance, beginning of period.................... $190,720 $189,078 $202,741
     Additions during period--Acquisition,
      improvements, etc............................    1,024    1,642      463
     Deductions during period--Write-off of tenant
      improvements.................................                    (14,126)
                                                    -------- -------- --------
   Balance, close of period........................ $191,744 $190,720 $189,078
                                                    ======== ======== ========
</TABLE>
 
  The following table reconciles the accumulated depreciation from January 1,
1993 to December 31, 1995:
 
<TABLE>
<CAPTION>
                                                      YEAR ENDED DECEMBER 31,
                                                      ------------------------
                                                       1995    1994     1993
                                                      ------- ------- --------
                                                           (IN THOUSANDS)
   <S>                                                <C>     <C>     <C>
   Balance, beginning of period...................... $71,924 $64,248 $ 67,678
     Additions during period--Depreciation and
      amortization for the year......................   7,327   7,676    8,035
     Deductions during period--Accumulated
      depreciation of written-off tenant
      improvements...................................                  (11,465)
                                                      ------- ------- --------
   Balance, close of period.......................... $79,251 $71,924 $ 64,248
                                                      ======= ======= ========
</TABLE>
 
                                      F-25
<PAGE>
 
                         INDEPENDENT AUDITORS' REPORT
 
To the Partners of Kilroy Group:
 
  We have audited the accompanying combined historical summary of certain
revenues and certain expenses (defined as operating revenues less direct
operating expenses) of the Acquisition Properties for the year ended December
31, 1995. This financial statement is the responsibility of the Acquisition
Properties management. Our responsibility is to express an opinion on this
combined statement of revenues and certain expenses based on our audits.
 
  We conducted our audit in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to
obtain reasonable assurance about whether the combined historical summary of
certain revenues and certain expenses is free of material misstatement. An
audit includes examining, on a test basis, evidence supporting the amounts and
disclosures in the combined historical summary of certain revenues and certain
expenses. An audit also includes assessing the accounting principles used and
significant estimates made by management, as well as evaluating the overall
presentation of the combined historical summary of certain revenues and
certain expenses. We believe our audit provides a reasonable basis for our
opinion.
 
  The accompanying combined historical summary of certain revenues and certain
expenses was prepared for purpose of complying with the rules and regulations
of the Securities and Exchange Commission for inclusion in the Form S-11
Registration Statement of Kilroy Realty Corporation. Material amounts,
described in Note 1 to the historical summary of certain revenues and certain
expenses, that would not be comparable to those resulting from the proposed
future operation of the Acquisition Properties are excluded, and the summary
is not intended to be a complete presentation of the revenues and expenses of
these properties.
 
  In our opinion, such historical summary of certain revenues and certain
expenses presents fairly, in all material respects, the combined certain
revenues and certain expenses, as defined in Note 1, of the Acquisition
Properties for the year ended December 31, 1995 in conformity with generally
accepted accounting principles.
 
DELOITTE & TOUCHE LLP
 
Los Angeles, California
June 7, 1996
 
                                     F-26
<PAGE>
 
                             ACQUISITION PROPERTIES
 
     COMBINED HISTORICAL SUMMARIES OF CERTAIN REVENUES AND CERTAIN EXPENSES
 
                        YEAR ENDED DECEMBER 31, 1995 AND
                   SIX MONTHS ENDED JUNE 30, 1996 (UNAUDITED)
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                        SIX MONTHS
                                                           ENDED     YEAR ENDED
                                                         JUNE 30,   DECEMBER 31,
                                                           1996         1995
                                                        ----------- ------------
                                                        (UNAUDITED)
<S>                                                     <C>         <C>
CERTAIN REVENUES:
  Rental income........................................   $2,663       $5,082
  Tenant reimbursements................................      323          688
  Other income.........................................      203          408
                                                          ------       ------
    Total certain revenues.............................    3,189        6,178
                                                          ------       ------
CERTAIN EXPENSES:
  Property expenses (Note 3)...........................      552        1,352
  Real estate taxes....................................      169          286
  Ground rent (Note 4).................................      169          338
  General and administrative...........................      116          244
                                                          ------       ------
    Total certain expenses.............................    1,006        2,220
                                                          ------       ------
CERTAIN REVENUES IN EXCESS OF CERTAIN EXPENSES.........   $2,183       $3,958
                                                          ======       ======
</TABLE>
 
 
   See notes to combined statements of certain revenues and certain expenses.
 
                                      F-27
<PAGE>
 
                            ACQUISITION PROPERTIES
 
    NOTES TO COMBINED HISTORICAL SUMMARIES OF CERTAIN REVENUES AND CERTAIN
                                   EXPENSES
 
1. BASIS OF PRESENTATION
 
  The combined historical summaries of certain revenues and certain expenses
relate to the operations of two properties, Westlake Plaza Centre, located in
Thousand Oaks, and Long Beach I (collectively, the "Acquisition Properties"),
which are expected to be acquired by Kilroy Realty Corporation (the "Company")
from two unaffiliated third parties.
 
  Operating revenues and operating expenses are presented on the accrual basis
of accounting. The accompanying statements of certain revenues and certain
expenses are not representative of the actual operations for the period
presented, as certain revenues and certain expenses that may not be comparable
to the revenues and expenses expected to be incurred by the Company in the
proposed future operation of the Acquisition Properties have been excluded.
Revenues excluded consist of termination fees and interest income. Expenses
excluded consist of interest, depreciation, professional fees and other costs
not directly related to the future operations of the Acquisition Properties.
 
2. OPERATING LEASES
 
  Rental income is recognized on the accrual method as earned, which
approximates recognition on a straight line basis.
 
  The Acquisition Properties are leased to tenants under operating leases with
expiration dates extending to the year 2009. Future minimum rents under the
Acquisition Property's office leases, excluding tenant reimbursements are as
follows:
 
<TABLE>
<CAPTION>
     YEAR ENDING
     DECEMBER 31,
     ------------                                                 (IN THOUSANDS)
     <S>                                                          <C>
      1996......................................................     $ 5,393
      1997......................................................       4,246
      1998......................................................       3,838
      1999......................................................       2,820
      2000......................................................       2,072
      Thereafter................................................      14,510
                                                                     -------
        Total...................................................     $32,879
                                                                     =======
</TABLE>
 
3. RELATED-PARTY TRANSACTIONS
 
  Property expenses include $90,000 and $181,000 of management fees for the
six months ended June 30, 1996 and for the year ended December 31, 1995,
respectively, related to Long Beach I, which was paid to an affiliate of the
Company.
 
4. COMMITMENTS
 
  Long Beach I is located on land that is under a noncancelable ground lease
which expires in 2035 and is classified as an operating lease. Minimum annual
lease payments are as follows:
 
<TABLE>
<CAPTION>
     YEAR ENDING
     DECEMBER 31,
     ------------                                                 (IN THOUSANDS)
     <S>                                                          <C>
      1996......................................................     $   338
      1997......................................................         338
      1998......................................................         338
      1999......................................................         338
      2000......................................................         338
      Thereafter................................................      11,661
                                                                     -------
        Total...................................................     $13,351
                                                                     =======
</TABLE>
 
                                     F-28
<PAGE>
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
NO DEALER, SALESPERSON OR ANY OTHER PERSON HAS BEEN AUTHORIZED TO GIVE ANY IN-
FORMATION OR TO MAKE ANY REPRESENTATIONS OTHER THAN THOSE CONTAINED IN THIS
PROSPECTUS IN CONNECTION WITH THE OFFER MADE BY THIS PROSPECTUS AND, IF GIVEN
OR MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING
BEEN AUTHORIZED BY THE COMPANY OR ANY OF THE UNDERWRITERS. THIS PROSPECTUS
DOES NOT CONSTITUTE AN OFFER TO SELL OR THE SOLICITATION OF ANY OFFER TO BUY
ANY SECURITY OTHER THAN THE SHARES OF COMMON STOCK OFFERED BY THIS PROSPECTUS,
NOR DOES IT CONSTITUTE AN OFFER TO SELL OR A SOLICITATION OF ANY OFFER TO BUY
THE SHARES OF COMMON STOCK BY ANYONE IN ANY JURISDICTION IN WHICH SUCH OFFER
OR SOLICITATION IS NOT AUTHORIZED, OR IN WHICH THE PERSON MAKING SUCH OFFER OR
SOLICITATION IS NOT QUALIFIED TO DO SO, OR TO ANY PERSON TO WHOM IT IS UNLAW-
FUL TO MAKE SUCH OFFER OR SOLICITATION. NEITHER THE DELIVERY OF THIS PROSPEC-
TUS NOR ANY SALE MADE HEREUNDER SHALL, UNDER ANY CIRCUMSTANCES, CREATE ANY IM-
PLICATION THAT ANY INFORMATION CONTAINED HEREIN IS CORRECT AS OF ANY TIME SUB-
SEQUENT TO THE DATE HEREOF.
 
UNTIL    , 1997 (25 DAYS AFTER COMMENCEMENT OF THIS OFFERING), ALL DEALERS EF-
FECTING TRANSACTIONS IN THE REGISTERED SECURITIES, WHETHER OR NOT PARTICIPAT-
ING IN THIS DISTRIBUTION, MAY BE REQUIRED TO DELIVER A PROSPECTUS. THIS IS IN
ADDITION TO THE OBLIGATION OF DEALERS TO DELIVER A PROSPECTUS WHEN ACTING AS
UNDERWRITERS AND WITH RESPECT TO THEIR UNSOLD ALLOTMENTS OR SUBSCRIPTIONS.
 
                                --------------
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                          PAGE
                                                                          ----
<S>                                                                       <C>
Prospectus Summary.......................................................   1
Risk Factors.............................................................  18
The Company..............................................................  33
Use of Proceeds..........................................................  39
Distribution Policy......................................................  41
Capitalization...........................................................  46
Dilution.................................................................  47
Selected Financial Data..................................................  48
Management's Discussion and Analysis of Financial Condition and Results
 of Operations...........................................................  50
Business and Properties..................................................  54
Policies with Respect to Certain Activities..............................  89
The Financing............................................................  94
Management...............................................................  95
Formation and Structure of the Company................................... 100
Certain Relationships and Related Transactions........................... 105
Principal Stockholders................................................... 106
Description of Capital Stock............................................. 107
Certain Provisions of Maryland Law and of the Company's Articles of
 Incorporation and Bylaws................................................ 110
Partnership Agreement of the Operating Partnership....................... 115
Shares Available for Future Sale......................................... 119
Federal Income Tax Consequences.......................................... 121
ERISA Considerations..................................................... 135
Underwriting............................................................. 137
Legal Matters............................................................ 138
Experts.................................................................. 138
Additional Information................................................... 139
Glossary................................................................. 140
Index to Financial Statements............................................ F-1
</TABLE>
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
                               9,260,000 Shares
 
                                    [LOGO]
 
                           KILROY REALTY CORPORATION
 
                                 Common Stock
 
                                  ----------
 
                                  PROSPECTUS
 
                                  ----------
 
                      PRUDENTIAL SECURITIES INCORPORATED
 
                         DONALDSON, LUFKIN & JENRETTE
                            SECURITIES CORPORATION
 
                               J.P. MORGAN & CO.
 
                               SMITH BARNEY INC.
 
 
                                        , 1996
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>
 
                                    PART II
 
                    INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 30. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.
 
  The following table sets forth the fees and expenses in connection with the
issuance and distribution of the securities being registered hereunder. Except
for the SEC registration fee, all amounts are estimates.
 
<TABLE>
     <S>                                                                <C>
     SEC Registration Fee.............................................. $64,539
     NYSE Filing Fee...................................................
     Printing and Engraving Expenses...................................
     Legal Fees and Expenses...........................................
     Accounting Fees and Expenses......................................
     Registrar and Transfer Agent Fees and Expenses....................
     Blue Sky Fees and Expenses........................................
     Miscellaneous Expenses............................................
                                                                        -------
       Total........................................................... $
                                                                        =======
</TABLE>
 
  All of the costs identified above will be paid by the Company.
 
ITEM 31. SALES TO SPECIAL PARTIES.
 
  See Item 32.
 
ITEM 32. RECENT SALES OF UNREGISTERED SECURITIES.
 
  In connection with the Formation Transactions, an aggregate of 1,653,835
Units will be issued to certain partners of the Kilroy Group transferring
interests in the Properties and certain other assets to the Company in
consideration of the transfer of such Properties and assets. The issuance of
such Units will be effected in reliance upon an exemption from registration
under Section 4(2) of the Securities Act as a transaction by an issuer not
involving a public offering. See "The Formation and Structure of the Company."
 
ITEM 33. INDEMNIFICATION OF DIRECTORS AND OFFICERS.
 
  Section 2-418 of the Maryland General Corporation law empowers the Company
to indemnify, subject to the standards set forth therein, any person who is a
party in any action in connection with any action, suit or proceeding brought
or threatened by reason of the fact that the person was a director, officer,
employee or agent of such company, or is or was serving as such with respect
to another entity at the request of such company. The Maryland General
Corporation Law also provides that the Company may purchase insurance on
behalf of any such director, officer, employee or agent.
 
  The Company's Articles of Incorporation and Bylaws provide in effect for the
indemnification by the Company of the directors and officers of the Company to
the fullest extent permitted by applicable law.
 
ITEM 34. TREATMENT OF PROCEEDS FROM STOCK BEING REGISTERED.
 
  Not applicable.
 
                                     II-1
<PAGE>
 
ITEM 35. FINANCIAL STATEMENTS AND FINANCIAL STATEMENT SCHEDULES AND EXHIBITS.
 
 (A)(1) FINANCIAL STATEMENTS
 
<TABLE>
<S>                                                                         <C>
Kilroy Realty Corporation
 Pro Forma (Unaudited):
  Pro Forma Condensed Consolidated Balance Sheet as of June 30, 1996
  Notes to Pro Forma Condensed Consolidated Balance Sheet
  Pro Forma Condensed Consolidated Statements of Operations for the six
   months ended
   June 30, 1996 and the Year Ended December 31, 1995
  Notes to Pro Forma Condensed Consolidated Statements of Operations
 Historical:
  Independent Auditors' Report
  Balance Sheet as of September 30, 1996
  Notes to Balance Sheet
Kilroy Group (Predecessor Affiliates)
  Independent Auditors' Report
  Combined Balance Sheets as of June 30, 1996 (unaudited), and December 31,
   1995 and 1994
  Combined Statements of Operations for the six months ended June 30, 1996
   and 1995 (unaudited) and the three years ended December 31, 1995
  Combined Statements of Partners' Deficit for the six months ended June
   30, 1996 (unaudited) and for the three years ended December 31, 1995
  Combined Statements of Cash Flows for the six months ended June 30, 1996
   and 1995 (unaudited) and the three years ended December 31, 1995
  Notes to Combined Financial Statements
Acquisition Properties
  Independent Auditors' Report
  Combined Historical Summaries of Certain Revenues and Certain Expenses
   for the six months ended June 30, 1996 (unaudited) and for the year
   ended December 31, 1995
  Notes to Combined Historical Summaries of Certain Revenues and Certain
   Expenses
</TABLE>
 
 (A)(2) FINANCIAL STATEMENT SCHEDULE
 
<TABLE>
<S>                                                                       <C>
Schedule II--Valuation and qualifying accounts for the three years ended
 December 31, 1995
</TABLE>
 
 (B) EXHIBITS
 
<TABLE>
<CAPTION>
 EXHIBIT
   NO.                                DESCRIPTION
 -------                              -----------
 <C>     <S>
  *1.1   Form of Underwriting Agreement among the Registrant and the
         Underwriters named therein.
 **3.1   Articles of Incorporation of the Registrant.
 **3.2   Bylaws of the Registrant.
  *3.3   Form of Certificate for Common Stock of the Registrant.
  *5.1   Opinion of Ballard, Spahr, Andrews & Ingersoll regarding the validity
         of the Common Stock being registered.
  *8.1   Opinion of Latham & Watkins regarding certain federal income tax
         matters.
 *10.1   Form of Agreement of Limited Partnership of Kilroy Realty, L.P.
 *10.2   Form of Registration Rights Agreement among the Registrant and the
         persons named therein.
 *10.3   Form of 1996 Stock Option and Incentive Plan for Key Employees of the
         Registrant, Kilroy Realty, L.P. and Kilroy Services, Inc.
 *10.4   Form of Indemnification Agreement between the Registrant and its
         directors and officers.
 *10.5   Employment Agreement between the Registrant and John B. Kilroy, Jr.
 *10.6   Employment Agreement between the Registrant and Jeffrey C. Hawken.
</TABLE>
 
                                      II-2
<PAGE>
 
<TABLE>
<CAPTION> 
 EXHIBIT
   NO.                                 DESCRIPTION
 -------                               -----------
 <C>     <S>
  *10.7  Form of Management Agreement between Kilroy Services, Inc. and Kilroy
         Realty, L.P.
  *10.8  Omnibus Option Agreement by and among Kilroy Realty, L.P. and the
         parties named therein.
 **10.9  Real Estate Purchase Agreement between Northwestern Mutual Life
         Insurance Company and Kilroy Industries.
 **10.10 Lease Agreement dated July 17, 1985 by and between Kilroy Long Beach
         Associates and the City of Long Beach for Kilroy Long Beach Phase III.
 **10.11 Lease Agreement dated April 21, 1988 by and between Kilroy Long Beach
         Associates and the Board of Water Commissioners of the city of Long
         Beach, acting for and on behalf of the City of Long Beach, for Long
         Beach Phase IV.
 **10.12 Lease Agreement dated December 30, 1988 by and between Kilroy Long
         Beach Associates and the City of Long Beach for Kilroy Long Beach
         Phase II.
 **10.13 First Amendment to Lease, dated January 24, 1989, by and between
         Kilroy Long Beach Associates and the City of Long Beach for Kilroy
         Long Beach Phase III.
 **10.14 Second Amendment to Lease Agreement, dated December 28, 1990, by and
         between Kilroy Long Beach Associates and the City of Long Beach for
         Kilroy Long Beach Phase III.
 **10.15 First Amendment to Lease Agreement, dated December 28, 1990, by and
         between Kilroy Long Beach Associates and the City of Long Beach for
         Kilroy Long Beach Phase II.
 **10.16 Third Amendment to Lease Agreement, dated October 10, 1994, by and
         between Kilroy Long Beach Associates and the City of Long Beach for
         Kilroy Long Beach Phase III.
 **10.17 Development Agreement by and between Kilroy Long Beach Associates and
         the City of Long Beach.
 **10.18 Amendment No. 1 to Development Agreement by and between Kilroy Long
         Beach Associates and the City of Long Beach.
  *10.19 Supplemental Representations, Warranties and Indemnity Agreement by
         and between the parties named therein.
  *10.20 Form of Option Properties Agreement by and between KAICO and Kilroy
         Realty, L.P.
 **10.21 Purchase and Sale Agreement and Joint Escrow Instructions by and
         between Westlake Plaza Partners and Kilroy Industries.
 **10.22 First Amendment to Purchase and Sale Agreement and Joint Escrow
         Instructions by and between Westlake Plaza Partners and Kilroy
         Industries.
 **10.23 Development Management Agreement by and between Kilroy Technology
         Company and the Redevelopment Agency of the City of Riverside.
  *10.24 Form of Mortgage Loan.
  *10.25 Form of Revolving Credit Facility.
  *10.26 Form of Waiver and Recontribution Agreement between Kilroy Realty,
         L.P. and the Registrant.
  *10.27 Form of Indemnity Agreement among Executive Officers and Kilroy
         Realty, L.P.
  *10.28 Form of Contribution Agreement between Kilroy Realty, L.P. and the
         Registrant.
  *10.29 Development and Disposition Agreement by and between Kilroy Industries
         and the City of Thousand Oaks Redevelopment Agency.
  *10.30 Form of Option Properties Agreement by and between Kilroy Calabasas
         Company and Kilroy Realty, L.P.
</TABLE>
 
                                      II-3
<PAGE>
 
<TABLE>
 <C>     <S>
 EXHIBIT
   NO.                      DESCRIPTION
 -------                    -----------
   *21.1 List of Subsidiaries of the Registrant.
   *23.1 Consent of Latham & Watkins.
   *23.2 Consent of Ballard, Spahr, Andrews & Ingersoll.
  **23.3 Consent of Deloitte & Touche LLP.
  **23.4 Consent of Robert Charles Lesser & Co.
  **24.1 Power of Attorney. (Filed herewith on page II-5.)
  **27.1 Financial Data Schedule
</TABLE>
- --------
*  To Be Filed By Amendment
** Filed Herewith
 
ITEM 36. UNDERTAKINGS.
 
  Insofar as indemnification for liabilities arising under the Securities Act
of 1933 (the "Act") may be permitted to directors, officers, and controlling
persons of the Registrant pursuant to the provisions described under Item 33
above, or otherwise, the Registrant has been advised that in the opinion of
the Securities and Exchange Commission, such indemnification is against public
policy as expressed in the Act and is, therefore, unenforceable. In the event
that a claim for indemnification against such liabilities (other than the
payment by the Registrant of expenses incurred or paid by a director, officer,
or controlling person of the registrant in the successful defense of any
action, suit, or proceeding) is asserted by such director, officer, or
controlling person in connection with the securities registered, the
Registrant will, unless in the opinion of its counsel the matter has been
settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Act and will be governed by the final adjudication
of such issue.
 
  The Registrant hereby undertakes:
 
    (1) For purposes of determining any liability under the Act, the
  information omitted from the form of Prospectus filed as part of the
  Registration Statement in reliance upon Rule 430A and contained in the form
  of Prospectus filed by the Registrant pursuant to Rule 424(b)(1) or (4) or
  497(h) under the Act shall be deemed to be part of the Registration
  Statement as of the time it was declared effective.
 
    (2) For the purpose of determining any liability under the Act, each
  post-effective amendment that contains a form of prospectus shall be deemed
  to be a new registration statement relating to the securities offered
  therein, and the offering of such securities at that time shall be deemed
  to be the initial bona fide offering thereof.
 
                                     II-4
<PAGE>
 
                                  SIGNATURES
 
  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, AS AMENDED, THE
REGISTRANT CERTIFIES THAT IT HAS REASONABLE GROUNDS TO BELIEVE THAT IT MEETS
ALL OF THE REQUIREMENTS FOR FILING ON FORM S-11 AND HAS DULY CAUSED THIS
REGISTRATION STATEMENT TO BE SIGNED ON ITS BEHALF BY THE UNDERSIGNED THEREUNTO
DULY AUTHORIZED IN THE CITY OF EL SEGUNDO, STATE OF CALIFORNIA, ON THE 5TH DAY
OF NOVEMBER, 1996.
 
                                          Kilroy Realty Corporation
 
                                                 /s/ John B. Kilroy, Jr.
                                          By: _________________________________
                                                    JOHN B. KILROY, JR.
                                               President and Chief Executive
                                                          Officer
 
                                          Date: November 5, 1996
 
                               POWER OF ATTORNEY
 
  KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints John B. Kilroy, Sr., John B. Kilroy, Jr., and
each of them, as his true and lawful attorneys-in-fact and agents, with full
power of substitution and resubstitution, for him or her and in his or her
name, place and stead, in any and all capacities, to sign any or all
amendments (including post-effective amendments) to this Registration
Statement, and to file the same, with all exhibits thereto, and other
documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorneys-in-fact and agents, and each of them,
full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the foregoing, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents, or their substitutes,
may lawfully do or cause to be done by virtue hereof.
 
  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, AS AMENDED, THIS
REPORT HAS BEEN SIGNED BELOW BY THE FOLLOWING PERSONS ON BEHALF OF THE
REGISTRANT AND IN THE CAPACITIES AND ON THE DATES INDICATED.
 
              SIGNATURE                        TITLE                 DATE
 
      /s/ John B. Kilroy, Sr.          Chairman of the           November 5,
- -------------------------------------   Board and Director           1996
         JOHN B. KILROY, SR.
 
      /s/ John B. Kilroy, Jr.          President, Chief          November 5,
- -------------------------------------   Executive Officer,           1996
         JOHN B. KILROY, JR.            Secretary,
                                        Treasurer and
                                        Director (Principal
                                        Executive Officer
                                        and Principal
                                        Accounting Officer)
 
                                     II-5
<PAGE>
 
                                 KILROY GROUP
 
                 SCHEDULE OF VALUATION AND QUALIFYING ACCOUNTS
 
           EACH OF THE YEARS ENDED DECEMBER 31, 1995, 1994 AND 1993
                                (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                              CHARGED TO
                                 BALANCE AT   COSTS AND                BALANCE
                                 BEGINNING   EXPENSES OR               AT END
                                 OF PERIOD  RENTAL REVENUE DEDUCTIONS OF PERIOD
                                 ---------- -------------- ---------- ---------
<S>                              <C>        <C>            <C>        <C>
Year Ended December 31, 1995
  Allowance for uncollectible
   rent.........................    $835        $1,103       $(145)    $1,793
                                    ====        ======       =====     ======
Year Ended December 31, 1994
  Allowance for uncollectible
   rent.........................    $428        $  866       $(459)    $  835
                                    ====        ======       =====     ======
Year Ended December 31, 1993
  Allowance for uncollectible
   rent.........................    $284        $  317       $(173)    $  428
                                    ====        ======       =====     ======
</TABLE>
 
                                      S-1
<PAGE>
 
                                 EXHIBIT INDEX
 
<TABLE>
<CAPTION>
                                                                     SEQUENTIAL
 EXHIBIT                                                                PAGE
   NO.                     DESCRIPTION OF EXHIBIT                       NO.
 -------                   ----------------------                    ----------
 <C>     <S>                                                         <C>
   *1.1  Form of Underwriting Agreement among the Registrant and
         the Underwriters named therein.
  **3.1  Articles of Incorporation of the Registrant.
  **3.2  Bylaws of the Registrant.
   *3.3  Form of Certificate for Common Stock of the Registrant.
   *5.1  Opinion of Ballard, Spahr, Andrews & Ingersoll regarding
         the validity of the Common Stock being registered.
   *8.1  Opinion of Latham & Watkins regarding certain federal
         income tax matters.
  *10.1  Form of Agreement of Limited Partnership of Kilroy
         Realty, L.P.
  *10.2  Form of Registration Rights Agreement among the
         Registrant and the persons named therein.
  *10.3  Form of 1996 Stock Option and Incentive Plan for Key
         Employees of the Registrant, Kilroy Realty, L.P. and
         Kilroy Services, Inc.
  *10.4  Form of Indemnification Agreement between the Registrant
         and its directors and officers.
  *10.5  Employment Agreement between the Registrant and John B.
         Kilroy, Jr.
  *10.6  Employment Agreement between the Registrant and Jeffrey
         C. Hawken.
  *10.7  Form of Management Agreement between Kilroy Services,
         Inc. and Kilroy Realty, L.P.
  *10.8  Omnibus Option Agreement by and among Kilroy Realty, L.P.
         and the parties named therein.
 **10.9  Real Estate Purchase Agreement between Northwestern
         Mutual Life Insurance Company and Kilroy Industries.
 **10.10 Lease Agreement dated July 17, 1985 by and between Kilroy
         Long Beach Associates and the City of Long Beach for
         Kilroy Long Beach Phase III.
 **10.11 Lease Agreement dated April 21, 1988 by and between
         Kilroy Long Beach Associates and the Board of Water
         Commissioners of the city of Long Beach, acting for and
         on behalf of the City of Long Beach, for Long Beach Phase
         IV.
 **10.12 Lease Agreement dated December 30, 1988 by and between
         Kilroy Long Beach Associates and the City of Long Beach
         for Kilroy Long Beach Phase II.
 **10.13 First Amendment to Lease, dated January 24, 1989, by and
         between Kilroy Long Beach Associates and the City of Long
         Beach for Kilroy Long Beach Phase III.
 **10.14 Second Amendment to Lease Agreement, dated December 28,
         1990, by and between Kilroy Long Beach Associates and the
         City of Long Beach for Kilroy Long Beach Phase III.
 **10.15 First Amendment to Lease Agreement, dated December 28,
         1990, by and between Kilroy Long Beach Associates and the
         City of Long Beach for Kilroy Long Beach Phase II.
 **10.16 Third Amendment to Lease Agreement, dated October 10,
         1994, by and between Kilroy Long Beach Associates and the
         City of Long Beach for Kilroy Long Beach Phase III.
 **10.17 Development Agreement by and between Kilroy Long Beach
         Associates and the City of Long Beach.
 **10.18 Amendment No. 1 to Development Agreement by and between
         Kilroy Long Beach Associates and the City of Long Beach.
  *10.19 Supplemental Representations, Warranties and Indemnity
         Agreement by and between the parties named therein.
  *10.20 Form of Option Properties Agreement by and between KAICO
         and Kilroy Realty, L.P.
</TABLE>
<PAGE>
 
<TABLE>
<CAPTION>
                                                                     SEQUENTIAL
 EXHIBIT                                                                PAGE
   NO.                     DESCRIPTION OF EXHIBIT                       NO.
 -------                   ----------------------                    ----------
 <C>     <S>                                                         <C>
 **10.21 Purchase and Sale Agreement and Joint Escrow Instructions
         by and between Westlake Plaza Partners and Kilroy
         Industries.
 **10.22 First Amendment to Purchase and Sale Agreement and Joint
         Escrow Instructions by and between Westlake Plaza
         Partners and Kilroy Industries.
 **10.23 Development Management Agreement by and between Kilroy
         Technology Company and the Redevelopment Agency of the
         City of Riverside.
  *10.24 Form of Mortgage Loan.
  *10.25 Form of Revolving Credit Facility.
  *10.26 Form of Waiver and Recontribution Agreement between
         Kilroy Realty, L.P. and the Registrant.
  *10.27 Form of Indemnity Agreement among Executive Officers and
         Kilroy Realty, L.P.
  *10.28 Form of Contribution Agreement between Kilroy Realty,
         L.P. and the Registrant.
  *10.29 Development and Disposition Agreement by and between
         Kilroy Industries and the City of Thousand Oaks
         Redevelopment Agency.
  *10.30 Form of Option Properties Agreement by and between Kilroy
         Calabasas Company and Kilroy Realty, L.P.
  *21.1  List of Subsidiaries of the Registrant.
  *23.1  Consent of Latham & Watkins.
  *23.2  Consent of Ballard, Spahr, Andrews & Ingersoll.
 **23.3  Consent of Deloitte & Touche LLP.
 **23.4  Consent of Robert Charles Lesser & Co.
 **24.1  Power of Attorney. (filed herewith on page II-5.)
 **27.1  Financial Data Schedule
</TABLE>
- --------
*  To Be Filed By Amendment
** Filed Herewith

<PAGE>
 
                                                                     EXHIBIT 3.1

                           KILROY REALTY CORPORATION

                           ARTICLES OF INCORPORATION
                           -------------------------

             FIRST:  The undersigned, Charles R. Moran, whose address is c/o 
Ballard Spahr Andrews & Ingersoll, 300 East Lombard Street, 19th Floor, 
Baltimore, Maryland 21202, being at least eighteen years of age, acting as 
incorporator, does hereby form a corporation under the General Laws of the State
of Maryland.

             SECOND: The name of the corporation (which is hereinafter called 
the "Corporation") is:

               Kilroy Realty Corporation  9-13-96 at 12:23 p.m.

             THIRD: The purposes for which and any of which the Corporation is 
formed and the business and objects to be carried on and promoted by it are:

                (1)  To engage in business as a real estate investment trust 
under the Internal Revenue Code of 1986, as amended (the "Code"), or any 
successor statute of similar import.

                (2)  To engage in and perform any other activities or functions 
which may lawfully be performed by a business corporation organized under the 
General Laws of the State of Maryland.

             The foregoing enumerated purposes and objects shall be in no way
limited or restricted by reference to, or inference from, the terms of any other
clause of this or any other Article of the Charter of the Corporation, and each
shall be regarded as independent; and they are intended to be and shall be
construed as powers as well as purposes and objects of the Corporation and shall
be in addition to and not in limitation of the general powers of corporations
under the General Laws of the State of Maryland.

             FOURTH:  The present address of the principal office of the 
Corporation in the State of Maryland is c/o Ballard Spahr Andrews & Ingersoll, 
300 East Lombard Street, 19th Floor, Baltimore, Maryland 21202.

             FIFTH:   The name and address of the resident agent of the
Corporation is Charles R. Moran, c/o Ballard Spahr Andrews & Ingersoll, 300 East
Lombard Street, 19th Floor, Baltimore, Maryland 21202. Said resident agent is a
Maryland resident.

             SIXTH:   The total number of shares of stock of all classes which 
the Corporation has authority to issue is Ten Million (10,000,000) shares of 
common stock, par value One Cent ($.01) per




- --------------------------------------------------------------------------------
                               STATE OF MARYLAND
                               -----------------

I hereby certify that this is a true and complete copy of the 6 page document on
file in this office.  DATED:  9-13-96

                 STATE DEPARTMENT OF ASSESSMENTS AND TAXATION

BY: /s/ SIGNATURE             , Custodian
    --------------------------
This stamp replaces our previous certification system.  Effective: 6/95
- --------------------------------------------------------------------------------
<PAGE>
 
share (the "Common Stock"), having an aggregate par value of One Hundred
Thousand Dollars ($100,000).

          SEVENTH:  The business and affairs of the Corporation shall be managed
by a Board of Directors which may exercise all of the powers of the Corporation 
except those conferred on, or reserved to, the stockholders by law.  The number 
of directors of the Corporation initially shall be two (2), which number may be
increased or decreased pursuant to the By-laws of the Corporation but in no
event shall be less than the minimum number required by the General Laws of the
State of Maryland. Each director shall hold office until the next annual meeting
of the stockholders of the Corporation and until his or her successor shall have
been elected and qualified. The names of the directors who will serve until the
first annual meeting of stockholders of the Corporation and until their
successors are elected and qualified are as follows:

               John B. Kilroy, Sr.
               John B. Kilroy, Jr.

          EIGHTH:  The following provisions are hereby adopted for the purposes 
of defining, limiting and regulating the powers of the Corporation and of the 
directors and stockholders:

               (1)  The Board of Directors shall have power from time to time
and in its sole discretion (a) to determine in accordance with sound accounting
practice what constitutes annual or other net profits, earnings, surplus or net
assets in excess of capital; (b) to fix and vary from time to time the amount to
be reserved as working capital, or determine that retained earnings or surplus
shall remain in the hands of the Corporation; (c) to set apart out of any funds
of the Corporation such reserve or reserves in such amount or amounts and for
such proper purposes as it shall determine and to abolish or redesignate any
such reserve or any part thereof; (d) to borrow or raise money upon any terms
for any corporate purposes; (e) to distribute and pay distributions or dividends
in stock, cash or other securities or property, out of surplus or any other
funds or amounts legally available there for, at such times and to the
stockholders of record on such dates as it may, from time to time, determine;
and (f) to determine whether and to what extent and at what times and places and
under what conditions and regulations the books, accounts and documents of the
Corporation, or any of them shall be open to the inspection of stockholders,
except as otherwise provided by statute or by the By-laws of the Corporation,
and, except as so provided, no stockholder shall have the right to inspect any
book, account or document of the Corporation unless authorized so to do by
resolution of the Board of Directors.

               (2)  The liability of the directors and officers of the 
Corporation to the Corporation or its stockholders for money

                                      -2-

<PAGE>
 
damages shall be limited to the fullest extent permitted under the General Laws
of the State of Maryland now or hereafter in force, including, but not limited
to, Section 5-349 of the Courts and Judicial Proceedings Article of the
Annotated Code of Maryland, or any successor provision of law of similar import,
and the directors and officers of the Corporation shall have no liability
whatsoever to the Corporation or its stockholders for money damages except to
the extent which such liability can not be limited or restricted under the
General Laws of the State of Maryland now or hereafter in force. Neither the
amendment nor repeal of the foregoing sentence of this Section (2) of Article
EIGHTH nor the adoption nor amendment of any other provision of the Charter or
By-laws of the Corporation inconsistent with the foregoing sentence shall apply
to or affect in any manner the applicability of the foregoing sentence with
respect to any act or omission of any director or officer occurring prior to any
such amendment, repeal or adoption.

                 (3) The Corporation shall indemnify, in the manner and to the
fullest extent permitted by law, any person who is or was a party to, or is
threatened to be made a party to, any threatened, pending or completed action,
suit or proceeding, whether or not by or in the right of the Corporation and
whether civil, criminal, administrative, investigative or otherwise, by reason
of the fact that such person is or was a director or officer of the Corporation,
or that such person, while an officer or director of the Corporation, is or was
serving at the request of the Corporation as a director, officer, partner or
trustee of another corporation, partnership, trust, employee benefit plan or
other enterprise. To the fullest extent permitted by law, the indemnification
provided herein shall include expenses (including attorneys' fees), judgments,
fines and amounts paid in settlement and any such expenses may be paid by the
Corporation in advance of the final disposition of any such action, suit or
proceeding. Upon authorization by the Board of Directors, the Corporation may
indemnify employees and/or agents of the Corporation to the same extent provided
herein for directors and officers. Any repeal or modification of any of the
foregoing sentences of this Section (3) of Article EIGHTH shall be prospective
in operation and effect only, and shall not adversely affect any right to
indemnification or advancement of expenses hereunder existing at the time of any
such repeal or modification.

                 (4) No holders of shares of stock of the Corporation of any
class shall have any preemptive rights or preferential right to purchase,
subscribe for or otherwise acquire any shares of stock of the Corporation of any
class now or hereafter authorized or any securities convertible into or
exchangeable for shares of stock of the Corporation of any class now or
hereafter authorized or any warrants, options or other instruments evidencing
rights to purchase, subscribe for or otherwise acquire shares of stock of the
Corporation of any class

                                      -3-
<PAGE>
 
now or hereafter authorized, other than such preferential rights, if any, as the
Board of Directors in its sole discretion may determine, and at such price as 
the Board of Directors in its sole discretion may fix.

               (5)  The Board of Directors of the Corporation shall have the
power in its sole discretion and without limitation, to authorize the issuance
at any time and from time to time of shares of stock of the Corporation, with or
without par value, of any class now or hereafter authorized and of securities
convertible into or exchangeable for shares of the stock of the Corporation,
with or without par value, of any class now or hereafter authorized, for such
consideration (irrespective of the value or amount of such consideration) and in
such manner and by such means as said Board of Directors may deem advisable.

               (6)  The Board of Directors shall have the power in its sole 
discretion and without limitation to classify or reclassify any unissued shares 
of stock, whether now or hereafter authorized, by setting, altering or 
eliminating in any one or more respects, from time to time before the issuance 
of such shares, any feature of such shares, including but not limited to the 
designation, preferences, conversion or other rights, voting powers, 
qualifications, and terms and conditions of redemption of, and limitations as to
dividends and any restrictions on, such shares.

               (7)  The Corporation reserves the right at any time and from time
to time to make any amendments to its Charter including any amendments changing
the terms of contract rights, as expressly set forth in its Charter, of any of
its outstanding stock by classification, reclassification or otherwise; and all
contract or other rights, preferences and privileges of whatsoever nature
conferred upon stockholders, directors and officers by and pursuant to the
Charter of the Corporation are granted subject to this reservation.

          The  enumeration and definition of particular powers of the Board of 
Directors included in the foregoing shall in no way be limited or restricted by 
reference to or inference from the terms of any other clause of this or any 
other Article of the Charter of the corporation, or construed as or deemed by 
inference or otherwise in any manner to exclude or limit any powers conferred 
upon the Board of Directors under the General Laws of the State of Maryland now 
or hereafter in force.

                                      -4-
<PAGE>
 
          IN WITNESS WHEREOF, I have signed these Articles of Incorporation, 
acknowledging the same to be my act on this 13th day of September, 1996.
                                            ----

WITNESS:


/s/ SIGNATURE                             /s/ Charles R. Moran
- ------------------------------------      ------------------------------------
                                          Charles R. Moran

                                      -5-

<PAGE>
 
                                                               EXHIBIT 3.2
 
                           KILROY REALTY CORPORATION

                                    BYLAWS
                                    ------
                                   ARTICLE I
                                 STOCKHOLDERS
                                 ------------


Section 1 - ANNUAL MEETING
            --------------

     The annual meeting of the stockholders of the Corporation shall be held in
May of each year at the time and place as shall be designated by the Board of
Directors by resolution and stated in the notice of the meeting. The business to
be transacted at the annual meeting shall include the election of directors and
any other corporate business as may come before the meeting.

Section 2 - SPECIAL MEETING
            ---------------

     At any time in the intervals between annual meetings, a special meeting of
the stockholders may be called by the President or by the Board of Directors,
and shall be called by the President at the request in writing of stockholders
owning twenty five percent (25%) in amount of the entire capital stock of the
Corporation issued and outstanding and entitled to vote. Such request shall
state the purpose or purposes of the proposed meeting. No business shall be
transacted at a special meeting save that specially named in the notice.

Section 3 - NOTICE OF MEETING
            -----------------
    
     Not less than ten (10) days nor more than ninety (90) days before the date
of every stockholders' meeting, the Secretary shall give to each stockholder
entitled to vote at such meeting, and to each stockholder not entitled to vote
who is entitled to notice by statute, written or printed notice stating the
date, time and place of the meeting and, in the case of a special meeting, the
purpose or purposes for which the meeting is called, either by presenting it to
him personally or by leaving it at his residence or usual place of business or
by mailing it to him at his address as it appears on the records of the
Corporation. Notice which is mailed in accordance with the preceding sentence
shall be deemed to be given at the time when the same shall be deposited in the
United States mail with postage thereon prepaid. Any stockholder may waive
notice of any meeting by written waiver filed with the records of the meeting,
either before or after the holiday thereof. The attendance of a stockholder at a
meeting shall constitute a waiver of notice of such meeting, except where a
stockholder attends a meeting for the express purpose of objecting to the
transaction of any business because the meeting is not lawfully called or
convened.

<PAGE>
 
      No business shall be transacted at a special meeting save that specially 
named in the notice.

Section 4 - NOMINATION AND STOCKHOLDER BUSINESS
            -----------------------------------

     (a)  Annual Meetings of Stockholders

          (1) Nominations of persons for election to the Board of Directors and
the proposal of business to be considered by stockholders may be made at an
annual meeting of stockholders (i) pursuant to the Corporation's notice of the
meeting, (ii) by or at the direction of the Board of Directors or (iii) by any
stockholder of the Corporation who was a stockholder of record at the time of
giving notice provided for in this Section 4(a), who is entitled to vote at the
meeting and who has complied with the notice procedure set forth in this Section
4(a).
 
          (2) For nominations or other business to be properly brought before an
annual meeting by a stockholder pursuant to clause (iii) of paragraph (a)(1) of
this Section 4, the stockholder must have given timely notice thereof in writing
to the secretary of the Corporation. To be timely, a stockholder's notice shall
be delivered to the secretary at the principal executive offices of the
Corporation not less than 60 days nor more than 90 days prior to the first
anniversary of the preceding year's annual meeting; provided, however, that in
the event that the date of the annual meeting is advanced by more than 30 days
or delayed by more than 60 days from such anniversary date, notice by the
stockholder to be timely must be so delivered not earlier than the 90th day
prior to such annual meeting and not later than the close of business on the
later of the 60th day prior to such annual meeting or the tenth day following
the day on which public announcement of the date of such meeting is first made.
Such stockholder's notice shall set forth (i) as to each person whom the
stockholder proposes to nominate for election or reelection as a director all
information relating to such person that is required to be disclosed in
solicitations of proxies for election of directors, or is otherwise required, in
each case pursuant to Regulation 14A under the Securities Exchange Act of 1934,
as amended (the "Exchange Act") (including such person's written consent to
being named in the proxy statement as a nominee and to serving as a director if
elected); (ii) as to any other business that the stockholder proposes to bring
before the meeting, a brief description of the business desired to be brought
before the meeting, the reasons for conducting such business at the meeting and
any material interest in such business of such stockholder and of the beneficial
owner, if any, on whose behalf the proposal is made; and (iii) as to the
stockholder giving the notice and the beneficial owner, if any, on whose behalf
the nomination or proposal is made, (x) the name and address of such
stockholder, as they appear on the Corporation's books, and of such beneficial
owner and (y) the class and number of shares of stock of

                                      -2-
<PAGE>
 
the Corporation which are owned beneficially and of record by such stockholder 
and such beneficial owner.

            (3) Notwithstanding anything in the second sentence of paragraph (a)
(2) of this Section 4 to the contrary, in the event that the number of directors
to be elected to the Board of Directors is increased and there is no public
announcement naming all of the nominees for director or specifying the size of
the increased Board of Directors made by the Corporation at least 70 days prior
to the first anniversary of the preceding year's annual meeting, a stockholder's
notice required by this Section 4(a) shall also be considered timely, but only
with respect to nominees for any new positions created by such increase, it
shall be delivered to the secretary at the principal executive offices of the
Corporation not later than the close of business on the tenth day following the
day on which such public announcement is first made by the Corporation.

      (b)   Special Meetings of Stockholders.  Only such business shall be 
            --------------------------------
conducted at a special meeting of stockholders as shall have been brought before
the meeting pursuant to the Corporation's notice of meeting.  Nominations of 
persons for election to the Board of Directors may be made at a special meeting
of stockholders at which directors are to be elected (i) pursuant to the 
Corporation's notice of meeting, (ii) by or at the direction of the Board of 
Directors or (iii) provided that the Board of Directors has determined that 
directors shall be elected at such special meeting, by any stockholder of the 
Corporation who is a stockholder of record at the time of giving of notice 
provided for in this Section 4 (b) who is entitled to vote at the meeting and 
who complied with the notice procedures set forth in this Section 4 (b).  In the
event the Corporation calls a special meeting of stockholders for the purpose of
electing one or more directors to the Board of Directors, any such stockholder
may nominate a person or persons (as the case may be) for election to such 
position as specified in the Corporation's notice of meeting, if the 
stockholder's notice required by paragraph (a) (2) of this Section 4 shall be 
delivered to the secretary at the principal executive offices of the Corporation
not earlier than the 90th day prior to such special meting and not later than 
the close of business on the later of the 60th days prior to such special 
meeting or the tenth day following the day on which public announcement is first
made of the date of the special meeting and of the nominees proposed by the 
Board of Directors to be elected at such meeting.

      (c)  General.
           ------- 
            (1) Only such persons who are nominated in accordance with the
procedures set forth in this Section 4 shall be eligible to serve as directors
and only such business shall be conducted at a meeting of stockholders as shall
have been brought before the


                                      -3-

<PAGE>
 
meeting in accordance with the procedures set forth in this Section 4.  The 
presiding officer of the meeting shall have the power and duty to determine 
whether a nomination or any business proposed to be brought before the meeting 
made in accordance with the procedures set forth in this Section 4 and, if any 
proposed nomination of business is not in compliance with this Section 4, to 
declare that such defective nomination or proposal be disregarded.

          (2)  For purposes of this Section 4, "public announcement" shall mean 
disclosure in a press release reported by the Dow Jones News Service, Associated
Press or comparable news service or in a document publicly filed by the 
Corporation with the Securities and Exchange Commission pursuant to Section 13, 
14 or 15(d) of the Exchange Act.

          (3)  Notwithstanding the foregoing provisions of this Section 4, a 
stockholder shall also comply with all applicable requirements of state law and 
of the Exchange Act and the rules and regulations thereunder with respect to the
matters set forth in this Section 4.  Nothing in this Section 4 shall be deemed 
to affect any rights of stockholders to request inclusion of proposals in the 
Corporation's proxy statement pursuant to Rule 14a-8 under the Exchange Act.

Section 5 - QUORUM
            ------

     At any meeting of stockholders the presence in person or by proxy of 
stockholders entitled to cast a majority of the votes thereat shall constitute a
quorum; but this section shall not affect any requirement under any statute or 
the Articles of Incorporation (the "Articles") of the Corporation for the vote 
necessary for the adoption of any measure.  A majority of the votes cast at a 
meeting of stockholders, duly called and at which a quorum is present, shall be 
sufficient to take or authorize action upon any matter which may properly come 
before the meeting unless more than a majority of votes is required by statute, 
by the Articles or by these Bylaws.

     In the absence of a quorum a majority of the shares represented in person 
or by proxy may adjourn the meeting from time to time not more than one hundred 
twenty (120) days without further notice other than by announcement at such 
meeting.  At such adjourned meeting at which a quorum shall be present, any 
business may be transacted which might have been transacted at the meeting 
originally called.  If the adjournment is for more than thirty (30) days, or if 
after adjournment a new record date is fixed for the adjourned meeting, a notice
of the adjourned meeting shall be given to each stockholder entitled to vote at 
the meeting.

                                      -4-
<PAGE>
 
Section 6 - VOTING
            ------

     Each share of Common Stock shall be entitled to one (1) vote.

Section 7 - VOTING OF STOCK BY CERTAIN HOLDERS
            ----------------------------------

     Stock registered in the name of a corporation, partnership, trust or other 
entity if entitled to be voted may be voted by the president or vice president, 
a general partner, or trustee thereof as the case may be, or a proxy appointed 
by any of the foregoing individual, unless some other person who has been 
appointed to vote such stock pursuant to a bylaw or a resolution of the board of
directors of such corporation or other entity presents a certified copy of such 
bylaw or resolution, in which case such person may vote such stock.  Any 
director or other fiduciary may vote stock registered in his name as such 
fiduciary, either in person or by proxy.

     Shares of stock of the Corporation directly or indirectly owned by it shall
not be voted at any meeting and shall not be counted in determining the total 
number of outstanding shares entitled to be voted at any given time unless they
are held by it in a fiduciary capacity in which case they may be voted and shall
be counted in determining the total number of outstanding shares at any given
time.

     The Board of Directors may adopt, by resolution, a procedure by which a 
stockholder may certify, in writing, to the Corporation that any shares of stock
registered in the name of the stockholder are held for the account of a 
specified person other than a stockholder.  The resolutions shall set forth:  
the class of stockholders who may make the certification, the purpose for which 
the certification may be made, the form of certification and the information to 
be contained in it; if the certification is with respect to a record date of 
closing of the stock transfer books, the time after the record date of the stock
transfer books within which the certification must be reviewed by the 
Corporation; and any other provisions with respect to the procedure which the 
Board of Directors considers necessary or desirable.  On receipt of such 
certification, the person specified in the certification shall be regarded as, 
for the purposes set forth in the certification, the stockholder of record of
the specified stock in place of the stockholder who makes certificates.

     Notwithstanding any provision of the Charter of the Corporation or these 
Bylaws, Subtitle 7 of Title 3 of the Maryland General Corporation Law ("MGCL") 
(as the same be hereafter be amended from time to time), and/or hereafter 
acquired or held by John B. Kilroy, Sr. and John B. Kilroy, Jr. and/or any 
affiliates (as defined in Section 3-601 of the MGCL) or associates (as defined 
in Section 3-701 of the MGCL) of any of the foregoing.

                                      -5-
<PAGE>
 
Section 8 - PROXIES
            -------

     At all meetings of stockholders, a stockholder may vote the shares owned of
record by him either in person or by proxy executed in writing by the 
stockholder or by his duly authorized attorney in fact.  Such proxy shall be 
filed with the Secretary of the Corporation before or at the time of the 
meeting.  No proxy shall be valid after eleven (11) months from the date of its 
execution, unless otherwise provided in the proxy.

Section 9 - PLACE OF MEETING
            ----------------

     The Board of Directors may designate any place, either within or without 
the State of Maryland, as the place of meeting for any annual or special meeting
of stockholders.  If no designation is made, or if a special meeting be 
otherwise called, the place of the meeting shall be the principal office of the 
Corporation.

Section 10 - INFORMAL ACTION
             ---------------

     Any action required or permitted to be taken at a meeting of stockholders 
may be taken without a meeting if there is filed with the records of 
stockholders meetings a unanimous written consent which sets forth the action 
and is signed by each stockholder entitled to vote on the matter and a written 
waiver of any right to dissent signed by each stockholder entitled to notice of 
the meeting but not entitled to vote thereat.

                                  ARTICLE II
                                   DIRECTORS
                                   ---------

Section 1 - POWERS
            ------

      The business and affairs of the Corporation shall be managed by its Board 
of Directors, which may exercise all of the powers of the Corporation, except 
such as are by statute or by the Charter or Bylaws of the Corporation expressly
conferred upon or reserved to the stockholders.

Section 2 - NUMBER AND TENURE
            -----------------

     At any regular meeting or at any special meeting called for that purpose, a
majority of the entire Board of Directors may establish, increase or decrease 
the number of directors, provided that the number thereof shall never be less 
than the minimum number required by the MGCL, nor more than thirteen (13), and 
further provided that the tenure of office of a director shall not be affected 
by any decrease in the number of directors.  Each director shall hold office 
until the next annual meeting of stockholders and until his successor shall have
been elected and qualified or until

                                      -6-
<PAGE>
 
his resignation, removal (in accordance with the Articles and these Bylaws) or 
death, if earlier.

Section 3 - VACANCIES
            ---------

     Any vacancy occurring on the Board of Directors shall be filled by the 
election by the remaining directors at any regular or special meeting, except 
that a vacancy resulting from an increase in the number of directors shall be 
filled by a majority vote of the entire board of board directors.  A director 
elected to fill a vacancy shall be elected for the unexpired term of his 
predecessor in office, provided that a director elected to fill a vacancy 
resulting from an increase in the number of directors shall be elected to serve 
until the next annual meeting of stockholders and until his successor is elected
and qualified.

Section 4 - REGULAR MEETINGS
            ----------------

     The Board of Directors shall meet for the purpose of the election of 
officers and the transaction of other business as soon as practicable after each
annual meeting of stockholders.  Other regular meetings of the Board of 
Directors shall be held at such times and such places, either within or without 
the State of Maryland, as may be designated from time to time by the President 
or by the Board of Directors.

Section 5 - SPECIAL MEETINGS
            ----------------

     Special meetings of the Board of Directors may be called by the President 
or by a majority of the directors.  The person or persons authorized to call 
special meetings of the Board of Directors may fix any place, either within or 
without the State of Maryland, as the place for holding the special meeting of 
the Board of Directors called by such person or persons.

Section 6 - NOTICE
            ------

     Notice of every regular or special meeting of the Board shall be given to
each director at least two (2) days-prior thereto either by written notice
delivered personally or mailed or telegrammed to his last known business or
residence address or by personal telephone call. Notice which is mailed in
accordance with the preceding sentence shall be deemed to be given at the time
when the same shall be deposited in the United States mail with postage thereon
prepaid. Any director may waive notice of any meeting by written waiver filed
with the records of the meeting, either before or after the holding thereof. The
attendance of a director at a meeting shall constitute a waiver of notice of
such meeting, except where a director attends a meeting for the express purpose
of objecting to the transaction of any business because the meeting is not
lawfully called or convened. Neither the business to be

                                      -7-
<PAGE>
 
transacted at, nor the purpose of, any regular or special meeting of the Board 
of Directors need be specified in the notice or waiver of notice of such 
meeting.

Section 7 - QUORUM
            ------

     A majority of the Board of Directors shall constitute a quorum for the 
transaction of business, but if less than such quorum is present at a meeting, a
majority of the directors present may adjourn the meeting from time to time 
without further notice other than announcement at the meeting, until a quorum 
shall be present.

Section 8 - MANNER OF ACTING
            ----------------

     The action of a majority of the directors present at a meeting at which a 
quorum is present shall constitute action of the Board of Directors unless the 
concurrence of a greater proportion is required for such action by statute, by 
the Charter of the Corporation or by these Bylaws.

Section 9 - COMPENSATION
            ------------

     By resolution of the Board of Directors a fixed sum and expenses, if any, 
of attendance at each regular or special meeting of the Board of Directors or of
committees hereof, and other compensation for their services as such or on 
committees of the Board of Directors, may be paid to the Directors.  No such 
payment shall preclude any director from serving the Corporation in any other 
capacity and receiving compensation therefor, pursuant to a resolution of the 
Board of Directors.

Section 10 - INFORMAL ACTION
             ---------------

     Any action required or permitted to be taken at any meeting of the Board of
Directors may be taken without a meeting if a written consent to such action is 
signed by all members of the Board of Directors and such written consent is 
filed with the minutes of proceedings of the Board of Directors.

Section 11 - MEETING BY CONFERENCE TELEPHONE
             -------------------------------

     Members of the Board of Directors may participate in a meeting by means of 
a conference telephone or similar communications equipment if all persons 
participating in the meeting can hear each other at the same time.  
Participating in a meeting by such means constitutes presence in person at a 
meeting.

Section 12 - REMOVAL
             -------

     A director may be removed, with or without cause, upon the affirmative vote
of not less than two-thirds (2/3) of the votes

                                      -8-
<PAGE>
 
entitled to be cast in the election of members of the Board of Directors and by 
the vote required to elect a director, the stockholders may fill a vacancy on 
the Board of Directors resulting from removal.

Section 13 - RESIGNATION
             -----------

     A director may resign at any time by giving written notice to the Board of 
Directors, the President or the Secretary of the Corporation.  Unless otherwise 
specified in the notice, the resignation shall take effect upon the receipt 
thereof by the Board of Directors or such officer and the acceptance of such 
resignation shall not be necessary to make it effective.

                                  ARTICLE III
                                  COMMITTEES
                                  ----------

Section 1 - COMMITTEES
            ----------

     The Board of Directors may appoint from among its members an Executive
Committee and other committees composed of two (2) or more directors and
delegate to these committees in the intervals between meetings of the Board of
Directors any of the powers of the Board of Directors, except the power to
declare dividends or distributions on stock, approve any merger or share
exchange which does not require stockholder approval, amend the Bylaws, issue
stock other than as permitted by statute, or recommend to the stockholders any
action which requires stockholder approval. Each committee may fix rules of
procedure for its business. A majority of the members of a committee shall
constitute a quorum for the transaction of business and the act of- a majority
of-those present at a meeting at which a quorum is present shall be the act of
the committee. The members of a committee present at any meeting, whether or not
they constitute a quorum, may appoint a director to act in place of an absent
member. The members of a committee may conduct any meeting thereof by conference
telephone in accordance with the provisions of Article II, Section 11.

Section 2 - MINUTES
            -------

     Each committee shall keep regular minutes of its meetings and report the 
same to the Board of Directors when required.

Section 3 - INFORMAL ACTION
            ---------------

     Any action required or permitted to be taken at any committee meeting may
be taken without a meeting if a written consent to such action is signed by all
of the members of the committee and such written consent is filed with the
minutes of proceedings of the Board of Directors.

                                      -9-
<PAGE>
 
                                  ARTICLE IV
                                   OFFICERS
                                   --------

Section 1 - NUMBER
            ------

     The officers of the Corporation shall include a Chief Executive Officer, 
President, any number of Vice Presidents, a Secretary, any number of Assistant 
Secretaries, a Treasurer, any number of Assistant Treasurers and may include a 
Chairman of the Board (or one or more Chairmen of the Board), a Vice Chairman of
the Board, a Chief Operating Officer, a Chief Financial Officer and such other 
officers as the Board of Directors may elect.  Any two (2) offices may be held 
by the same person, except those of President and Vice President.  In addition, 
the Board of Directors may from time to time appoint such other officers with 
such powers and duties as they shall deem necessary or desirable.

Section 2 - ELECTION AND TENURE
            -------------------

     The officers of the Corporation shall be elected by the Board of Directors 
at the first meeting of the Board of Directors held after each annual meeting of
the stockholders, or as soon after such first meeting as may be convenient, 
except that the Chief Executive Officer may appoint one or more vice presidents,
assistant secretaries and assistant  treasurers.  Each officer shall hold office
until his successor shall have been duly elected and shall have qualified, or 
until his death or until he shall resign or shall have been removed in the 
manner hereinafter provided.

     The Board of Directors may, at any time, and from time to time, authorize 
the making or adoption by the Corporation of special contracts with an officer 
or officers for services of such officer or officers for a fixed period and on 
such terms and conditions, and with such powers, duties and compensation, as may
be fixed by such contract, and may elect such officer or officers for such term 
or terms as may be specified by such contract.

Section 3 - REMOVAL; RESIGNATION
            --------------------

     Any officer or agent of the Corporation may be removed by the Board of 
Directors whenever, in its Judgment, the best interests of the Corporation will 
be served thereby, but such removal shall be without prejudice to the contract 
rights, if any, of the person so removed.  An officer may resign at any time by 
giving written notice to the Board of Directors, the President or the Secretary 
of the Corporation.  Unless otherwise specified in the notice, the resignation 
shall take effect upon the receipt thereof by the Board of Directors or such 
officer and the acceptance of such resignation shall not be necessary to make it
effective.

                                     -10-
<PAGE>
 
Section 4 - VACANCIES
            ---------
       A vacancy in an office may be filled by the Board of Directors for the 
unexpired portion of the term.

Section 5 - CHIEF EXECUTIVE OFFICER
            -----------------------

       The Board of Directors shall designate a Chief Executive Officer. In the
absence of such designation, the Chairman of the Board (or, if more than one,
the co-chairmen of the Board in the order designated at the time of their
election or, in the absence of any designation, then, in the order of their
election) shall be the Chief Executive Officer of the Corporation. The Chief
Executive Officer shall have general responsibility for implementation of the
policies of the Corporation, as determined by the Board of Directors, and for
the management of the business and affairs of the Corporation. In addition, the
Chief Executive Officer, together with the President, shall have the power to
determine the cash compensation of employees of the Corporation other than its
Senior Executive Officers.


Section 6 - CHIEF OPERATING OFFICER
            -----------------------

        The Board of Directors may designate a Chief Operating Officer. The 
Chief Operating Officer shall have the responsibilities and duties as set forth 
by the Board of Directors or the Chief Executive Officer.

Section 7 - CHIEF FINANCIAL OFFICER
            -----------------------

          The Board of Directors may designate a Chief Financial Officer.  The 
Chief Financial Officer shall have the responsibilities and duties as set forth 
by the Board of Directors of the Chief Executive Officer.

Section 8 - CHAIRMAN OF THE BOARD
            ---------------------

          The Board of Directors may designate a Chairman of the Board (or one
of more co-chairmen of the Board). The Chairman of the Board shall preside over
the meeting of the Board of Directors and of the stockholders at which he shall
be present. If there be more than one, the co-chairmen designated by the Board
of Directors will perform such duties. The Chairman of the Board shall perform
such other duties as may be assigned to him or them by the Board of Directors.

Section 9 - PRESIDENT
            ---------

          The President shall preside at all meetings of the Board of Directors
and of the stockholders at which he is present. He shall be the chief executive
officer of the Corporation and, subject to

                                     -11-

<PAGE>
 
the control of the Board of Directors, shall, in general, supervise and 
administer all of the business and affairs of the Corporation.  He may sign and 
execute all authorized bonds, contracts or other obligations in the name of the 
Corporation.  In general, the President shall have all powers and shall perform 
all duties incident to the office of President and such as may from time to time
be prescribed by the Board of Directors.

Section 10 - VICE PRESIDENT
             --------------

     In the absence or incapacity of the President, or in the event of a vacancy
in the office of the President, the Vice President, if one (or in the event 
there be more than one, the Vice Presidents in the order designated by the Board
of Directors, or, in the absence of such designation, then in the order of their
election) shall have the powers and perform the duties of President.  A Vice 
President shall also have such powers and perform such duties as may from time 
to time be prescribed by the Board of Directors or by the President.  A Vice 
President may have such additional descriptive designations, if any, in his 
title as may be assigned by the Board of Directors.

Section 11 - SECRETARY
             ---------

     The Secretary shall attend all meetings of the Board of Directors and all 
meetings of the stockholders and record all the proceedings of the meetings 
thereof in a book to be kept for that purpose and shall perform like duties for 
the standing committees when required.  He shall give, or cause to be given, 
notice of all meetings of the stockholders of the Board of Directors, and shall 
perform such other duties incident to the office of Secretary as from time to 
time may be prescribed by the Board of Directors or by the President, under 
whose supervision he shall be.  He shall have general charge of the stock ledger
and custody of the corporate records and of the seal of the Corporation and he, 
or an Assistant Secretary, shall have authority to affix the same to any 
instrument requiring it and when so affixed, it may be attested by his signature
or by the signature of such Assistant Secretary.  The Board of Directors may 
give general authority to any other officer to affix the seal of the Corporation
and to attest the affixing by his signature.

Section 12 - ASSISTANT SECRETARY
             -------------------

     The Assistant Secretary, if one (1) (or if there be more than one (1), the 
Assistant Secretaries in the order determined by the Board of Directors, or, in 
the absence of such determination, then in the order of their election) shall, 
in the absence of the Secretary or in the event of his inability or refusal to 
act, perform the duties and exercise the powers of the Secretary and

                                     -12-
<PAGE>
 

shall perform such other duties and have such other powers as the Board of 
Directors may from time to time prescribe.

Section 13 - TREASURER
             ---------

         The Treasurer shall have general charge of the financial affairs of the
Corporation. He shall in general have all powers and perform all duties incident
to the office of Treasurer and such as may from time to time be prescribed by
the Board of Directors or by the President.

         If required by the Board of Directors, he shall give the Corporation a
bond (which shall be renewed every six (6) years) in such sum and with such
surety or sureties as shall be satisfactory to the Board of Directors for the
faithful performance of the duties of his office and for the restoration to the
Corporation, in case of his death, resignation, retirement or removal from
office, of all books, papers, vouchers, money and other property of whatever
kind in his possession or under his control belonging to the Corporation.

Section 14 - ASSISTANT TREASURER
             -------------------

         The Assistant Treasurer, if one (1) (or if there shall be more than one
(1), the Assistant Treasurers in the order determined by the Board of Directors,
or if there be no such determination, then in the order of their election),
shall, in the absence of the Treasurer or in the event of his inability or
refusal to act, perform the duties and exercise the powers of the Treasurer and
shall perform such other duties and have such other powers as the Board of
Directors may from time to time prescribe.


Section 15 - OTHER OFFICERS
             --------------

         Such other officers as may be elected by the Board of Directors 
shall have such powers and perform such duties as the Board may from time to 
time prescribe.


Section 16 - SALARIES
             --------

         The salaries of the officers shall be fixed from time to time by the
Board of Directors, and no officer shall be prevented from receiving such salary
by reason of the fact that he is also a director of the Corporation.

Section 17 - SPECIAL APPOINTMENTS
             --------------------

          In the absence or incapacity of any officer, or in the event of a 
vacancy in any office, the Board of Directors may designate any person to fill 
any such office pro tempore or for any particular purpose.

                                     -13- 
<PAGE>
 
                                   ARTICLE V
                     CONTRACTS, LOANS, CHECKS AND DEPOSITS
                     -------------------------------------

Section 1 - CONTRACTS
            ---------

        The Board of Directors may authorize any officer or officers, agent or 
agents, to enter into any contract or execute and deliver any instrument in 
the name of and on behalf of the Corporation, and such authority may be general 
or confined to specific instances.

Section 2 - LOANS
            -----

        No loans shall be contracted on behalf of the Corporation and no
evidence of indebtedness shall be issued in its name unless authorized by a
resolution of the Board of Directors. Such authority may be general or confined
to specific instances.

Section 3 - CHECKS, DRAFTS, ETC.
            --------------------
        All checks, drafts or other orders for the payment of money, notes or
other evidences of indebtedness issued in the name of the Corporation, shall be
signed by such officer or officers of the corporation and in such manner as
shall from time to time be determined by resolution of the Board of Directors.

Section 4 - DEPOSITS
            --------
        All funds of the Corporation not otherwise employed shall be deposited
from time to time to the credit of the Corporation in such banks, trust
companies or other depositories as the Board of Directors may select.

                                     -14-
<PAGE>
 
                                  ARTICLE VI
                          ISSUE AND TRANSFER OF STOCK
                          ---------------------------

Section 1 - ISSUE
            -----

     Certificates representing shares of the Corporation shall be in such form
as shall be determined by the Board of Directors. Each certificate shall be
signed by the President or a Vice President and countersigned by the Secretary
or an Assistant Secretary, or the Treasurer or an Assistant Treasurer, and shall
be sealed with the corporate seal. The signatures may be either manual or
facsimile signatures; and the seal may be the actual corporate seal or a
facsimile of it or in any other form. All certificates surrendered to the
Corporation for transfer shall be canceled, and no new certificates shall be
issued until the former certificate or certificates for a like number of shares
shall have been surrendered and cancelled, except that in case of a lost,
stolen, destroyed or mutilated certificate, a new one may be issued therefor
upon such terms and indemnity to the Corporation as the Board of Directors may
prescribe.

Section 2 - TRANSFER OF SHARES
            ------------------

     Transfer of shares of the Corporation shall be made only on its stock 
transfer books by the holder of record thereof, or by his attorney thereunto 
authorized by power of attorney duly executed and filed with the Secretary of 
the Corporation, and on surrender for cancellation of the certificate for such 
shares.  The person in whose name shares stand on the books of the Corporation 
shall be deemed to be the owner thereof for all purposes.

Section 3 - STOCK LEDGER
            ------------

     The Corporation shall maintain a stock ledger which contains the name and 
address of each stockholder and the number of shares of stock of each class 
which the stockholder holds.  The stock ledger may be in written form or in any 
form which can be converted within a reasonable time into written form for 
visual inspection.  The original or a duplicate of the stock ledger shall be 
kept at the principal office or the principal executive offices of the 
Corporation in the State of Maryland.

                                  ARTICLE VII
                         FIXING DATE FOR DETERMINATION
                            OF STOCKHOLDERS' RIGHTS
                            -----------------------

     The Board of Directors may fix, in advance, a date as the record date for 
the purpose of determining stockholders entitled to notice of, or to vote at, 
any meeting of stockholders, or stockholders entitled to receive payment of any 
dividend or the

                                     -15-
<PAGE>
 
allotment of any rights, or in order to make a determination of stockholders for
any other proper purpose. Only stockholders of record on such date shall be
entitled to notice of, and to vote at, such meeting or to receive such dividends
or rights, as the case may be, notwithstanding any transfer of any stock on the
books of the Corporation after such record date fixed as aforesaid. A
determination of stockholders of record entitled to notice of or to vote at a
meeting of stockholders shall apply to any adjournment of the meeting; provided,
however, that the Board of Directors may fix a new record date for the adjourned
meeting.

                                 ARTICLE VIII
                                  AMENDMENTS
                                  ----------

     The Board of Directors shall have the exclusive right and power to alter, 
amend or repeal the Bylaws of the Corporation and to adopt new Bylaws.

                                  ARTICLE IX
                                  FISCAL YEAR
                                  -----------

     The fiscal year of the Corporation shall be fixed by resolution of the 
Board of Directors.

                                  ARTICLE IX
                                INDEMNIFICATION
                                ---------------

     The Corporation shall indemnify, in the manner and to the fullest extent
permitted by law, any person who is or was a party to, or is threatened to be
made a party to, any threatened, pending or completed action, suit or
proceeding, whether or not by or in the right of the Corporation and whether
civil, criminal, administrative, investigative or otherwise, by reason of the
fact that such person is or was a director or officer of the Corporation, or
that such person, while an officer or director of the Corporation, is or was
serving at the request of the Corporation as a director, officer, partner or
trustee of another corporation, partnership, trust, employee benefit plan or
other enterprise. To the fullest extent permitted by law, the indemnification
provided herein shall include expenses (including attorneys' fees), judgments,
fines and amounts paid in settlement and any such expenses may be paid by the
Corporation in advance of the final disposition of any such action, suit or
proceeding. Upon authorization by the Board of Directors, the Corporation may
indemnify employees and/or agents of the Corporation to the same extent provided
herein for directors and officers. Any repeal or modification of any of the
foregoing sentences of this Article IX, shall be prospective in operation and
effect only, and shall not adversely affect any right to indemnification or
advancement of

                                     -16-


<PAGE>
 
expenses hereunder existing at the time of any such repeal or modification.

     The indemnification and reimbursement of expenses provided herein shall not
be deemed to limit the right of the Corporation to indemnify any other person
against any liability and expenses to the fullest extent permitted by law, nor
shall it be deemed exclusive of any other right to which any person seeking
indemnification from the Corporation may be entitled under any agreement, the
Article, a vote of the stockholders or disinterested directors, or otherwise,
both as to action in such person's official capacity as an officer or director
of the Corporation and as to action in another capacity, at the request of the
Corporation, while acting as an officer or director of the Corporation.

                                     -17-

<PAGE>
 
                                                                    EXHIBIT 10.9

                        REAL ESTATE PURCHASE AGREEMENT

                                    BETWEEN

                THE NORTHWESTERN MUTUAL LIFE INSURANCE COMPANY,
                        A WISCONSIN CORPORATION, SELLER

                                      AND

                            KILROY INDUSTRIES, BUYER

                                       1
<PAGE>
 
                        REAL ESTATE PURCHASE AGREEMENT


                               Table of Contents

Article 1.  Agreement.

Article 2.  Recital.

Article 3.  Basic Terms.

Article 4.  The Transaction.

                  4.1.  Purchase and Sale.
                  4.2.  Escrow.
                  4.3.  Purchase Price.
                        4.3.1.  Initial Earnest Money.
                        4.3.2.  Additional Earnest Money.
                        4.3.3.  Retention and Disbursement of Earnest Money.
                        4.3.4.  Cash at Closing.

Article 5.  Title.

                  5.1.  Title Insurance Commitment.
                  5.2.  Subsequent Matters Affecting Title.
                  5.3.  Survey.

Article 6.  Condition of the Property.

                  6.1.  Inspection of Property.
                  6.2.  Certain Environmental Matters.
                        6.2.1.  Buyer's Environmental Investigation.
                        6.2.2.  Seller's Environmental Reports.
                  6.3.  Termination/Approval.
                        6.3.1.  Buyer's Approval/Right to Terminate.
                        6.3.2.  Seller's Right to Termination.
                  6.4.  Entry Onto Property.
                  6.5.  Estoppel Certificates.
                  6.6.  Representations and Warranties of Seller.

                                       2
<PAGE>
 
                  6.7.  No Other Representations and Warranties by Seller.
                  6.8.  Survival of Representations and Warranties of Seller.
                  6.9.  Seller Indemnity.
                  6.10. Representations and Warranties of Buyer.
                  6.11. Buyer Indemnity.
                  6.12. Management of the Property.
                  6.13. Leasing.

Article 7.  Closing.

                  7.1.  Buyer's Obligations.
                  7.2.  Seller's Obligations.
                  7.3.  Deposits in Escrow.
                        7.3.1.  Seller's Deposits.
                        7.3.2.  Buyer's Deposits.
                        7.3.3.  Joint Deposits.
                        7.3.4.  Other Documents.
                  7.4.  Costs.
                  7.5.  Title Insurance.
                  7.6.  Prorations.
                  7.7.  Insurance.
                  7.8.  Close of Escrow.
                  7.9.  Deliveries to Buyer.
                  7.10. Recorded Instruments.
                  7.11. Possession.

Article 8.  Casualty.

Article 9.  Condemnation.

Article 10. Notices.

Article 11. Successors and Assigns.

Article 12. Brokers.

Article 13. Covenant Not to Record.

Article 14. Default.

                                       3
<PAGE>
 
                  14.1.  Default By Buyer.
                  14.2.  Default By Seller.

Article 15.  Non-Default Termination.

Article 16.  Miscellaneous.

                  16.1.  Survival of Representations, Covenants, and 
                         Obligations.
                  16.2.  Attorneys' Fees.
                  16.3.  Publicity.
                  16.4.  Captions.
                  16.5.  Waiver.
                  16.6.  Time.
                  16.7.  Controlling Law.
                  16.8.  Severability.
                  16.9.  Construction.
                  16.10. Finance Committee Approval.
                  16.11. Execution.
                  16.12. Amendments.
                  16.13. Entire Agreement.
                  16.14. Exhibits.

                                       4
<PAGE>
 
                                                                     SRE 331269


                        REAL ESTATE PURCHASE AGREEMENT

     1.   Agreement.
          ---------

     This Real Estate Purchase Agreement ("Agreement") is made and entered into
as of the Date of Agreement between The Northwestern Mutual Life Insurance
Company ("NML" or "Seller") and Kilroy Industries ("Industries" or "Buyer").

     2.   Recitals.
          --------

     A.   "Kilroy" (as defined below) was the owner, free and clear of all liens
and claims except the Mortgage (as defined in the "Settlement Agreement"
referenced below), of a leasehold interest created by the "Ground Lease"
(described below) in and to the Property described below. As used herein,
"Kilroy" refers to Kilroy Long Beach Associates, a California limited
partnership in which Kilroy Industries (the Buyer hereunder) was the general
partner. The "Ground Lease" means that certain Lease Agreement made the 24th day
of January 1989 by and between Kilroy Long Beach Associates, as "Developer",
and the City of Long Beach, as "Landlord"; a Short Form of which Ground Lease
was recorded in Los Angeles County, California, on January 31, 1989 as Document
No. 89 159802.

     B.   As owner, Kilroy developed and leased the "Improvements" on the "Land"
(both as defined below).

     C.   Pursuant to a Settlement Agreement made as of the 21st day of July,
1993, by and between Kilroy and Seller (the "Settlement Agreement"), the Ground
Lease and the lessee's interest under the Ground Lease in the Improvements were
conveyed by Kilroy to Seller by an Assignment of Developer's Interest as Lessee
in Ground Lease dated July 21, 1993 which was recorded in Los Angeles County,
California, on July 23rd 1993 as Document No.931422619.

                                       5
<PAGE>
 
     D.  NML, as "Owner", and Kilroy, as "Operator", entered into a Management
and Operating Agreement (the "Management Agreement") pursuant to which Kilroy
has managed the Property for NML.

     E.  NML, as "Landlord", and De Vry, Inc., as "Tenant", entered into an 
Office Building Lease for the Property dated July 29, 1994 for reference
purposes (the "De Vry Lease").

     F.  Kilroy and Industries, as "Licensor", and De Vry, Inc., as "Licensee",
entered into a Parking License Agreement (the "License Agreement") dated July
29, 1994 for reference purposes, pursuant to which the Licensor granted to De
Vry a license to use a portion of certain property owned by Kilroy (as described
in the License Agreement) as off-site parking for the Property. Kilroy, De Vry,
Inc. and the City of Long Beach entered into a Non-Disturbance Agreement from
the Master Lessor dated August 8, 1994 with regard to the License Agreement.

     G.  Buyer desires to purchase from Seller and Seller desires to sell to
Buyer all of Seller's interest in the Property.

     NOW, THEREFORE, it is agreed as follows:

     3.  Basic Terms.
         -----------

     As used herein, the following Basic Terms are hereby defined to mean:

Approval Date.                   September 20, 1996.
- --------------

Broker.                          Eastdil Broker Services, Inc.
- -------

Broker's Commission.             $552,187.50
- --------------------

Buyer's Address for Notices.     2250 East Imperial Highway, Suite 1200 
- ----------------------------     El Segundo, California 90245
                                 Attn:  Jeffrey Hawken

     with a copy to:             Marshall L. McDaniel, Esq.
                                 McDaniel & McDaniel
                                 2250 East Imperial Highway, Suite 1200
                                 El Segundo, CA 90245

                                       6
<PAGE>
 
Closing Date.                    October 25, 1996
- -------------                                 

Date of Agreement.               September 2, 1996
- ------------------

Initial Earnest Money.           $25,000.00
- ----------------------

Additional Earnest Money.        $100,000
- -------------------------

Escrowholder.                    Chicago Title Insurance Company
- -------------

Estoppel Tenants.                Olympus America, Inc.
- -----------------                McDonnell Douglas Corporation
                                 Federal Express
                                 Lanier Worldwide
                                 Urban Science Application
                                 Leviton Manufacturing Company
                                 Chilton Company
                                 De Vry, Inc.

Involved Seller Employee(s)      Gary Farmer and Robert Ralls
- ---------------------------

Materiality Limit                $1,000,000 
- -----------------
(re: Casualty and Condemnation)
- -------------------------------

Property.                        The Seller's interest in certain real property
- ---------                        commonly known as Kilroy Airport Center, Long
                                 Beach, Phase I located at 3880 and 3900 Kilroy
                                 Airport Way, Long Beach, California, 90806
                                 within the County of Los Angeles and State of
                                 California, which real property is more
                                 particularly described on Exhibit "A-1"
                                 attached hereto and incorporated herein by this
                                 reference (the "Land"), together with the
                                 following: (a) all buildings, improvements and
                                 structures located on the Land (hereinafter
                                 collectively referred to as the
                                 "Improvements"); (b) the Seller's interest in
                                 all personal property owned by the Seller and
                                 used in the operation of the Land or
                                 Improvements to the extent any exist, including
                                 all fixtures and appliances, furniture and
                                 furnishings,

                                       7
<PAGE>
 
                                 equipment and supplies, signage and lighting
                                 systems (hereinafter collectively referred to
                                 as the "Personal Property" as described on
                                 Exhibit G hereto); (c) all of Seller's interest
                                 in and to all leases for space in the Property;
                                 and (d) such other rights, interests and
                                 properties as may be specified in this
                                 Agreement to be sold, transferred, assigned or
                                 conveyed by Seller to Buyer. (The Seller's
                                 interest in the Land, Improvements, Personal
                                 Property, together with the other rights and
                                 interests described above, are hereinafter
                                 collectively referred to herein as the
                                 "Property".)

Purchase Price.                  $23,250,000.00
- ---------------

Seller's Address for Notices.    The Northwestern Mutual Life Insurance Company
- -----------------------------    AT&T Building
                                 Suite 2100
                                 611 West Sixth Street
                                 Los Angeles, CA 90017
                                 Attn: Robert Ralls

     with copy to:               The Northwestern Mutual Life
                                 Insurance Company
                                 720 East Wisconsin Avenue
                                 Milwaukee, WI 53202
                                 Attn: Susan Koleas

Tenant Lease or Leases.          Each lease listed on Exhibit B-1 hereto, and 
- -----------------------          those leases entered into by Seller after the
                                 Date of Agreement.

Title Insurer.                   Chicago Title Insurance Company
- --------------

     4.     The Transaction.
            ----------------

     4.1    Purchase and Sale. Subject to the provisions hereof, Seller shall,
            ------------------        
on or before the Closing Date, convey the Property to Buyer by an

                                       8
<PAGE>
 
Assignment (the "Assignment") in substantially the form as Exhibit A attached
hereto, subject to those matters permitted therein.

     4.2    Escrow. In order to effect the conveyance contemplated by this
            ------
Agreement, the parties hereto agree to open escrow at Escrowholder. Escrowholder
shall serve in the capacity of escrowholder hereunder if, and only if, Seller
has received an insured closing letter from Title Insurer, satisfactory to
Seller, insuring Seller against any loss or damage that Seller may incur as a
result of Escrowholder's failure to comply with Seller's closing instructions;
otherwise, Title Insurer shall serve as Escrowholder. A copy of this Agreement
shall be furnished to the Escrowholder upon full execution hereof.

     4.3    Purchase Price. Subject to the provisions hereof, Buyer agrees to
            --------------
pay the Purchase Price for the Property to Seller as follows:

     4.3.1  Initial Earnest Money. At the time of execution of this Agreement by
            ---------------------
Buyer and Seller, Buyer shall deposit with Escrowholder the Initial Earnest
Money and Buyer shall cause Escrowholder to notify Seller, no later than two (2)
business days after Escrowholder's receipt thereof, that Escrowholder has
received the Initial Earnest Money in cash and is holding same in accordance
with the terms hereof. Failure of Buyer to timely deposit the Initial Earnest
Money with Escrowholder shall constitute a material default by Buyer hereunder.

     4.3.2  Additional Earnest Money, At the expiration of the Inspection 
            ------------------------
Period (as defined in Section hereof entitled "Inspection of Property"), if
Buyer has not terminated this Agreement, Buyer shall deposit with Escrowholder
the Additional Earnest Money and Buyer shall cause Escrowholder to notify
Seller, no later than two (2) business days after Escrowholder's receipt
thereof, that Escrowholder has received the Additional Earnest Money in cash and
is holding same in accordance with the terms hereof. Failure of Buyer to timely
deposit the Additional Earnest Money with Escrowholder shall constitute a
material default by Buyer hereunder (the Initial Earnest Money and the
Additional Earnest Money hereinafter collectively referred to as the "Earnest
Money").

     4.3.3  Retention and Disbursement of Earnest Money. In accordance with the
            -------------------------------------------
terms of this Agreement, the Earnest Money shall be either (i) applied against
the Purchase Price, (ii) refunded to Buyer, or (iii) retained by Seller as
otherwise provided herein. The Earnest Money shall be held in an interest
bearing account at a bank in the name of Escrowholder.

                                       9
<PAGE>
 
The Escrowholder shall not disburse any of the Earnest Money except: (i) by
application of same against the Purchase Price at Closing (as defined in the
Section hereof entitled "Closing"), (ii) in accordance with written instructions
executed by both Buyer and Seller, or (iii) in accordance with the following
procedure:

     If Buyer or Seller, by notice to the Escrowholder, makes demand upon the
Escrowholder for the Earnest Money (the "Demanding Party"), the Escrowholder
shall, at the expense of the Demanding Party, give notice of such demand (the
"Notice of Demand") to the other party (the "Other party"). If the Escrowholder
does not receive notice from the Other Party contesting such disbursement of the
Earnest Money within five (5) business days from the date on which the Notice of
Demand was given, the Escrowholder shall disburse the Earnest Money to the
Demanding Party. In the event that the Escrowholder does receive notice from the
Other Party contesting such disbursement of the Earnest Money within five (5)
business days from the date on which the Notice of Demand was given, the
Escrowholder shall thereafter disburse the Earnest Money only in accordance with
written instructions executed by both Buyer and Seller, or if no such
instructions are received by Escrowholder, then in accordance with a final, non-
appealable court order.

     4.3.4  Cash at Closing.  Buyer shall pay to Seller the Purchase Price in
            ---------------
cash at the Closing, plus or minus the amount of any prorations required by this
Agreement, and the amount of Earnest Money then held by Escrowholder, plus any
interest thereon, shall be applied against the Purchase Price. Seller and Buyer
agree that no portion of the Purchase Price shall be allocated to the Personal
Property.

     5.     Title.
            -----

     5.1    Title Insurance Commitment.  Seller shall, as soon as reasonably
            --------------------------
possible after the Date of Agreement, obtain a title insurance commitment from
Title Insurer with respect to the Property, together with legible copies of the
exceptions set forth in such commitment, with the cost thereof to be paid in
accordance with the Section hereof entitled "Costs". Buyer shall have ten (10)
business days after its receipt of the Commitment to examine same and to notify
Seller in writing of its objections to title due to (i) the existence of any
items which would adversely affect the then current use of the Property or 
(ii) constitute liens upon the Property in favor of Seller relating to Seller's
former interest therein as leasehold mortgagee (all items so objected to being
hereinafter referred to as the "Objectionable Items"),

                                       10
<PAGE>
 
provided, however, that Buyer may not object to any matter affecting title to
the Property as of the date of the Settlement Agreement (except only for the
Mortgage or other liens in favor of Seller relating to Seller's former interest
therein as leasehold mortgagee), all of which shall conclusively be deemed to be
"Permitted Exceptions". All other matters affecting title to the Property as of
the date of the Commitment, except those specifically and timely objected to by
Buyer in accordance with this Section shall be deemed approved by Buyer and
shall also be deemed to be "Permitted Exceptions". If Buyer timely notifies
Seller of any Objectionable Items, Seller may, but shall not be obligated to,
cure or remove same. If Seller does cure or remove all such Objectionable Items,
Buyer shall be obligated to proceed with Closing. Such Objectionable Items shall
be deemed removed or cured if Buyer obtains, at Closing, an ALTA extended
coverage Owner's Policy of Title Insurance (1970 form) in the amount of the
Purchase Price in favor of Buyer as the grantee of Seller's interest in the
Property with such Objectionable Items having been removed as exceptions or
insured over by Title Insurer. Seller shall notify Buyer, within ten (10)
business days after Seller's receipt of Buyer's notice of Objectionable Items,
as to which Objectionable Items Seller is willing to remove or cure ("Seller's
Election"); and if no such notice is given within such time period, Seller shall
be deemed to have elected not to cure any of the Objectionable Items. If Seller
is unwilling or unable to cure some or all of the Objectionable Items, Buyer
shall, as its sole and exclusive remedy in such event, make an election in
writing ("Buyer's Election"), within five (5) business days after receipt by
Buyer of Seller's Election (or the expiration of the time period for Seller to
make Seller's Election if Seller fails to send notice of Seller's Election)
either:

     (a) To accept title to the Property subject to the Objectionable Items
     which Seller is unwilling or unable to cure (all such items being
     thereafter included in "Permitted Exceptions"), in which event the
     obligations of the parties hereunder shall not be affected by reason of
     such matters, the sale contemplated hereunder shall be consummated without
     reduction of the Purchase Price, and Buyer shall have no further right to
     terminate this Agreement pursuant to this Section; or,

     (b) To terminate this Agreement in accordance with the Section hereof
     entitled "Non-Default Termination".

If Seller has not received Buyer's Election within such five (5) business day
period, Buyer shall be deemed conclusively to have elected to accept title to
the Property subject to the Objectionable Items which Seller is unwilling or
unable to cure (all such items being thereafter included in "Permitted

                                       11
<PAGE>
 
Exceptions"), without reduction of the Purchase Price in accordance with
Subsection (a) above.

Seller shall use good faith efforts to obtain the consent of the City of Long
Beach to the Assignment, in the form set forth on Exhibit "A" hereto, but if for
any reason whatsoever Seller does not obtain such consent of the City of Long
Beach on or before the Closing, this Agreement shall terminate in accordance
with the Section hereof entitled "Non-Default Termination".

Anything to the contrary herein notwithstanding, under no circumstances shall
Seller be obligated to give the Title Insurer any certificate, affidavit or
other undertaking of any sort which might result in potential liability to
Seller in excess of the liability being undertaken by Seller in delivering the
Assignment to Buyer in accordance with the terms of this Agreement.

     5.2  Subsequent Matters Affecting Title.  If, for any reason whatsoever, 
          ----------------------------------
the title insurance policy which would otherwise be delivered to Buyer at
Closing reflects, as exceptions, any items other than Permitted Exceptions or
such Objectionable Items which Buyer has previously elected to accept in
accordance with the Section hereof entitled "Title Insurance Commitment", which
would materially, adversely affect the then current use of the Property, such
items shall, if and only if Buyer shall give written notice thereof to Seller no
later than the date of Closing, be deemed "Objectionable Items," and, if Buyer
shall so give notice to Seller, then:

     (a) The Closing shall, at Seller's option, be postponed to the first
     business day which is at least thirty (30) days after the date previously
     set for Closing; and

     (b) The rights and obligations of Buyer and Seller with regard to such
     Objectionable Items shall be as set forth in the Section hereof entitled
     "Title Insurance Commitment".

     5.3  Survey.  Buyer has the option, provided that Buyer does so promptly
          ------
after the Date of Agreement, at Buyer's sole cost and expense, to obtain a
survey of the Property, and upon completion shall provide certified original
surveys to Seller and Title Insurer, and cause the Title Insurer to issue a
supplement to the title insurance commitment setting forth those items which
such survey and any inspection reveal and which would be listed as exceptions in
an ALTA policy of title insurance covering the Property ("ALTA Supplement"). If
as a result of reviewing the survey and the ALTA Supplement, the Buyer or Title
Insurer determines there are additional

                                       12
<PAGE>
 
exceptions to title other than Permitted Exceptions which, in Buyer's sole
judgment, would materially adversely affect Buyer's intended use of the
Property, such items shall, if and only if Buyer shall give written notice
thereof to Seller no later than ten (10) business days after Buyer's receipt of
the survey, be deemed "Objectionable Items," and, if Buyer shall so give notice
to Seller, then the rights and obligations of Buyer and Seller with regard to
such Objectionable Items shall be as set forth in the Section hereof entitled
"Title Insurance Commitment".

     6.     Condition of the Property.
            --------------------------

     6.1    Inspection of Property. Subject to the provisions of the Sections
            -----------------------  
hereof entitled "Entry onto Property", "Buyer Indemnity" and "Seller's
Environmental Reports", from the Date of Agreement until the Approval Date (the
"Inspection Period"), Buyer shall have the right to conduct, at its own expense,
an inspection of the Property to do the following:

     (a) at its election and cost, determine zoning and financial aspects of the
     Property, enter upon the Property for purposes of examining its terrain,
     access thereto and physical condition, conducting environmental and other
     studies, doing engineering work, conducting site analyses and making any
     test or inspection Buyer may deem necessary related to the Property. During
     the Inspection Period Seller will provide Buyer and its representatives
     with reasonable access to the Property subject to the provisions of the
     Section hereof entitled "Entry Onto Property". Buyer's inspection rights
     shall be subject to the rights of the Tenant(s), including without
     limitation, rights of quiet enjoyment, and Buyer agrees that it will not
     unreasonably interfere with any Tenant(s) or contractors on the Property.
     Except to the extent that Buyer would be in violation of any law, Buyer
     agrees to hold in strict confidence any information obtained during the
     Inspection Period and the documents and information disclosed to Buyer
     pursuant hereto and pursuant to this Agreement, provided, however that
     Buyer may share such information with the consultants, legal counsel,
     lender's representatives and other similar parties it retains in connection
     with the purchase of the Property provided that Buyer takes all reasonable
     steps to ensure that they hold such information in strict confidence. Buyer
     agrees to provide Seller with copies of any reports generated in connection
     with the Property ("Inspection Reports"). Failure to so hold such
     information obtained during the Inspection Period in strict confidence, or
     to promptly provide Seller

                                       13
<PAGE>
 
     with copies of any Inspection Reports, shall constitute a material default
     hereunder on the part of Buyer.

     (b) As an affiliate of the Operator of the Property (pursuant to the
     Management Agreement), Buyer has access to the following to the extent
     Seller has in its possession relating to the Property: (i) copies of the
     income and expense operating statements for the Property for the most
     recent two (2) calendar years and the partial current year, (ii) Tenant
     Leases, along with a standard form lease, if any, (iii) the real property
     tax assessment and tax bills with respect to the Property for the past
     year, (iv) utility bills which have been the obligation of Seller for the
     preceding twelve (12) months, (v) all available warranties and guarantees,
     (vi) available licenses and permits, if any; (vii) all vendor service
     contracts which Seller is proposing to assign, including any and all
     amendments thereto, as described in Exhibit J hereto, (viii) available
     soils reports, if any, (ix) maintenance reports, (x) invoices and (xi) any
     correspondence with Tenant(s).

     6.2    Certain Environmental Matters.
            ------------------------------

     6.2.1  Buyer's Environmental Investigation.  Buyer, at its option, may
            ------------------------------------
conduct, at Buyer's cost, such independent investigation and inspection of the
Property as Buyer shall deem reasonably necessary to ascertain the environmental
condition of the Property. Buyer shall immediately deliver to Seller any reports
or other results of Buyer's environmental investigation of the Property
("Buyer's Environmental Report(s)"). Seller shall permit Buyer to undertake
testing on the Property to assess its environmental condition provided that,
prior to undertaking any such testing, Buyer and Seller shall enter into an
agreement which sets forth Buyer's and Seller's rights and obligations with
respect to such testing, in a form as set forth in Exhibit K attached hereto and
incorporated herein to be completed with specifics of such testing as deemed
reasonably acceptable to Seller. Buyer agrees not to disturb any asbestos which
may be on the Property, and if this transaction is not consummated for any
reason, to immediately repair any damage to the Property directly or indirectly
caused by any acts of Buyer or Buyer's agents in connection with Buyer's
Environmental Report(s). BUYER HAS BEEN EXPRESSLY ADVISED BY SELLER TO CONDUCT
AN INDEPENDENT INVESTIGATION AND INSPECTION OF THE PROPERTY (subject to the
provisions hereof), UTILIZING EXPERTS AS BUYER DEEMS NECESSARY. This Section
shall survive Closing or termination of this Agreement.

                                       14
<PAGE>
 
     6.2.2  Seller's Environmental Reports.  Buyer may examine the
            -------------------------------
environmental reports in Seller's possession ("Existing Environmental
Report(s)") which have been prepared on the Property as described on Exhibit "C"
hereto, copies of which are being furnished to Buyer contemporaneously with the
full execution of this Agreement. In addition, Seller may, but shall not be
required to conduct further environmental testing of the Property by a firm
selected by Seller, the cost of which shall be paid by Seller of Future
Environmental Report") (Existing Environmental Report(s) and any Future
Environmental Report(s) are hereinafter collectively referred to as "Seller's
Environmental Reports"). Seller Shall provide Buyer with a copy of any final
Future Environmental Report as soon as possible after the Date of Agreement.
Anything to the contrary herein notwithstanding, Seller shall have no
responsibility or liability with respect to the results or any inaccuracies of
any Seller's Environmental Report(s), and makes no representations or warranties
whatsoever regarding (i) the completeness of Seller's Environmental Report(s),
(ii) the truth or accuracy of Seller's Environmental Report(s) or (iii) the
existence or nonexistence of any hazardous or toxic wastes or materials in, on
or about the Property. Further, Seller is not assigning Seller's Environmental
Report(s) to Buyer or granting Buyer any rights with respect to the
environmental firms used by Seller.

     6.3    Termination/ Approval.
            ----------------------

     6.3.1  Buyer's Approval Notice/Right to Terminate.
            -------------------------------------------

     (a) On or before the expiration of the Approval Date, Buyer shall deliver
     to Seller and Escrowholder a written notice of "Approval Notice") to the
     effect that Buyer has approved the condition of the Property and chooses to
     proceed under the terms of the Agreement. At the time of Buyer's delivery
     of the Approval Notice, Buyer shall deposit with Escrowholder the
     Additional Earnest Money, was required in accordance with the Section
     hereof entitled "Additional Earnest Money". Buyer shall also specify in the
     Approval Notice those contracts which Buyer elects to have assigned to it,
     and the failure of Buyer to so specify shall be deemed to be an election by
     Buyer to have all contracts assigned to it and assume all contracts (except
     Seller's contract with the management company for the Property). If Buyer
     fails to timely send an Approval Notice, Buyer will be conclusively deemed
     to have terminated the Agreement, in which event this Agreement shall
     terminate in accordance with the Section hereof entitled "Non-Default
     Termination".

                                       15
<PAGE>
 
     (b) In addition to Buyer's rights under Subsection (a) above, in the event
     Seller shall deliver to Buyer Seller's Environmental Report at any time
     after the date which is ten (10) business days before the Approval Date,
     and if Buyer is not satisfied with Seller's Environmental Report based
     solely on matters not previously disclosed or known to Buyer, Buyer shall
     have the right to terminate this Agreement, in accordance with the Section
     hereof entitled "Non-Default Termination", by giving Seller notice of such
     termination on or before the date which business days after Buyer's receipt
     of Seller's Environmental Report ("Buyer's Review Date"). If Buyer receives
     any of Seller's Environmental Reports less than ten (10) business days
     before the Closing, then the Closing shall be postponed to one (1) business
     day after Buyer's Review Date, or such other date to which Buyer and Seller
     may mutually agree upon. If Seller shall not timely receive a notice of
     termination from Buyer, Buyer shall be conclusively deemed to have approved
     the results of Seller's Environmental Report and Buyer shall have no
     further right to terminate this Agreement with respect to matters set forth
     in this Section.

     6.3.2  Seller's Right to Terminate. If Seller is not satisfied with Buyer's
            ----------------------------
Environmental Report or with any Future Environmental Report, Seller shall have
the right to terminate this Agreement, in accordance with the Section hereof
entitled "Non-Default Termination", by giving Buyer notice of termination on or
before the date which is ten (10) business days after Seller's receipt of
Buyer's Environmental Report or of any Future Environmental Report (the
"Seller's Review Date"). If Seller receives Buyer's Environmental Report, or any
Future Environmental Report less than ten (10) business days before Closing,
then Closing shall, at Seller's option, be postponed one (1) business day after
Seller's Review Date, or such other date to which Buyer and Seller may mutually
agree upon. If Buyer shall not timely receive notice of termination from Seller,
Seller shall be conclusively deemed to have reviewed the results of Buyer's
Environmental Report and any Future Environmental Report, and Seller shall have
no further right to terminate this Agreement with respect to matters set forth
in this Section.

     6.4    Entry onto Property. Buyer and its agents shall observe all
            -------------------
appropriate safety precautions in conducting Buyer's inspection of the Property.
Buyer shall indemnify, defend and hold Seller harmless from and against any
losses, damages, expenses, liabilities, claims, demands and causes of action
(together with any legal fees and other expense incurred by Seller in connection
therewith), resulting directly or indirectly from, or in connection with, any
inspection of or other entry upon the Property (including

                                       16
<PAGE>
 
any investigation of the Property necessary for completion of Buyer's
Environmental Report and any entry onto the Property with the authorization of
Seller) by Buyer, or its agents, employees, contractors or other
representatives, including, without limitation, any losses, damages, expenses,
liabilities, claims, demands and causes of action resulting, or alleged to be
resulting, from injury or death of persons, or damage to the Property or any
other property, or mechanic's or materialmen's liens placed against the Property
in connection with Buyer's inspection thereof. This Section shall survive
Closing or termination of this Agreement.

     6.5.   Estoppel Certificates. On or before the Closing Date, with respect
            ----------------------
to each Estoppel Tenant then in the Property, Seller shall use its best efforts
to furnish to Buyer, an estoppel certificate completed by the Tenant, on
Tenant's form reasonably acceptable to Buyer and Seller. Without affecting
Buyer's or Seller's rights or obligations pursuant to this Agreement, Buyer and
Seller agree to negotiate in good faith with each other and with any Estoppel
Tenant to resolve any claim disclosed in an estoppel certificate against
Seller, as landlord, which Buyer reasonably deems will materially and adversely
affect Buyer's interest in the Property after the Closing Date. If Seller is not
reasonably able to obtain an estoppel certificate from any Estoppel Tenant on or
before the Closing Date, the same shall not be a default by Seller and Buyer
shall nonetheless be obligated to close the purchase of the Property. In light
of the fact that Buyer is intimately familiar with the operation and leasing of
the Property as a result of its role as manager thereof, Buyer shall be deemed
to have full knowledge of all matters relating to all leases affecting the
Property.

     6.6    Representations and Warranties of Seller. Subject to the limitations
            -----------------------------------------
set forth in the Sections hereof entitled "No Other Representations and
Warranties by Seller" and "Seller Indemnity", Seller hereby represents and
warrants that, except as set forth in Exhibit "D" hereto, to the best of
Seller's actual knowledge as of the Date of Agreement:

     (a) Seller has received no notice, not subsequently cured, from any
     governmental entity citing the Seller for any material violation of any
     building or zoning laws which are applicable to the present use and
     occupancy of the Property.

     (b) Seller has not been served in any litigation, arbitration or other
     judicial, administrative or other similar proceedings involving, related
     to, or arising out of the Property which is currently pending, and which

                                       17
<PAGE>
 
     would have a material impact on Buyer's ownership or operation of the
     Property.

     (c) Subject to the provisions of the Section hereof entitled "Finance
     Committee Approval", Seller, and the individuals signing this Agreement on
     behalf of Seller, have the full legal power, authority and right to execute
     and deliver, and to perform their legal obligations under this Agreement,
     and Seller's performance hereunder and the transactions contemplated
     hereby, have been duly authorized by all requisite action on the part of
     Seller and no remaining corporate action is required to make this Agreement
     binding on Seller.

     (d) There are no service or maintenance contracts in effect regarding the
     Property which will become obligations of Buyer following the Closing,
     except those contracts, if any, which Seller has agreed to assign and Buyer
     has agreed to assume.

     (e) Seller has received no written notice from any governmental agency with
     respect to any Hazardous Materials contamination on the Property, or with
     respect to any investigation, administrative order, consent order or
     agreement, litigation or settlement with respect to Hazardous Material or
     Hazardous Material contamination that is in existence with respect to the
     Property. As used herein, "Hazardous Material" means any hazardous, toxic
     or dangerous waste, substance or material, as defined for purposes of the
     Comprehensive Environmental Response, Compensation and Liability Act of
     1980, as amended, or any other federal, state or local law, ordinance, rule
     or regulation, applicable to the Property, and establishing liability
     standards or required action as to reporting, discharge, spillage, storage,
     uncontrolled loss, seepage, filtration, disposal, removal, use or existence
     of a hazardous, toxic or dangerous waste, substance or material.

     Buyer hereby acknowledges that "Seller's actual knowledge", upon which all
of the representations and warranties set forth are based, means only the
current actual knowledge of the Involved Seller Employee(s), without conducting
any investigations whatsoever.

     The sole and exclusive obligations of Seller with respect to the
representations and warranties set forth in this Section shall be as set forth
in the Section hereof entitled "Seller Indemnity".

                                       18
<PAGE>
 
     6.7    No Other Representations and Warranties by Seller. Except as set
            --------------------------------------------------
forth in the Section hereof entitled "Representations and Warranties of Seller",
and the warranty expressly set forth in the Assignment, Seller makes no other,
and specifically negates and disclaims any other representations, warranties,
promises, covenants, agreements or guarantees of any kind or character
whatsoever, whether express or implied, oral or written, past, present or
future, of, as to, concerning, with respect to or regarding title to the
Property, the physical condition of the Property and any Personal Property
listed in Exhibit "G-1" hereof, the compliance of the Property with applicable
government regulations, including, without limitation, the Americans with
Disabilities Act, or the past or future operating results of the Property.

     6.8    Survival of Representations and Warranties of Seller. Except for the
            -----------------------------------------------------
warranties set forth in the Assignment, which shall survive indefinitely, all
representations and warranties set forth in this Agreement or in any document to
be executed by Seller and delivered to Buyer at the Closing, shall survive for a
period of one year after the Closing Date only.

     6.9    Seller Indemnity. Seller hereby gives Buyer the following
            -----------------
indemnities, which, subject to the limitations set forth herein, shall be the
sole and exclusive obligations of Seller from and after Closing with respect to
the Property:

     (a) As Buyer's sole and exclusive remedy with regard to the condition of
     the Property, Seller shall indemnify Buyer against any actual, direct
     damages (and reasonable attorneys' fees and other legal costs) which Buyer
     can prove Buyer would not have incurred absent inaccuracy in the
     representations and warranties of Seller set forth in the Section hereof
     entitled "Representations and Warranties of Seller" as of the Closing,
     provided, however, that such agreement by Seller to so indemnify, defend
     and hold Buyer harmless:

          (1) shall be inapplicable to any claims, suits, actions, damages,
      costs, charges and expenses attributable to any state of facts of which
      Buyer (or any affiliate of Buyer) has or should have knowledge on or
      before the Closing (including, without limitation, any information Buyer
      and its affiliates should have known as manager, developer and former
      owner of the Property); and

          (2) shall be null and void except to the extent that Seller has
     received notice from Buyer within one year of Closing referring to this

                                       19
<PAGE>
 
     Section and specifying the amount, nature and facts underlying any claim
     being made by Buyer under this indemnity by Seller.

      (b) As Buyer's sole and exclusive remedy with regard to the operation of
the Property, Seller shall indemnify Buyer against any actual, direct damages
resulting from the claims of third parties concerning the overt acts of Seller
in connection with Seller's operation of the Property prior to the date the
Closing occurs, but only if and to the extent that such claims relate to:

          (1) matters which are in fact insured against by commercial liability
      insurance; or

          (2) intentional torts committed by Seller.

The provisions of this Section shall survive Closing, subject to limitations set
forth herein.

     6.10   Representations and Warranties of Buyer. Buyer hereby represents and
            ----------------------------------------
warrants to Seller that:

     (a) Buyer, has the full legal power, authority and right to execute and
     deliver, and to perform its legal obligations under this Agreement, and
     Buyer's performance hereunder and the transactions contemplated hereby have
     been duly authorized by all requisite action on the part of Buyer and no
     remaining action is required to make this Agreement binding on Buyer. The
     individuals signing this Agreement on behalf of Buyer have authority to do
     so. The provisions of this Section shall survive Closing.

     (b) Having been given the opportunity to inspect the Property, Buyer is
     relying, and will rely, solely on its own investigations of the title to,
     and physical condition of, the Property and the operating history and
     future potential of the Property as it deems appropriate and, to the
     maximum extent permitted by law, Buyer acknowledges and agrees that the
     Buyer is buying the Property on an "AS IS" and "WHERE IS" condition and
     basis, with all faults. Buyer is not relying on any statement or
     information made or given, directly or indirectly, orally or in writing,
     express or implied, by the Seller or its agents as to the physical and
     economic nature and/or condition of the Property but, rather, is and will
     be relying on independent evaluations by its own

                                       20
<PAGE>
 
     personnel or consultants to make a determination as to the physical
     and economic nature, condition and prospects of the Property.

     (c) Buyer has either: (i) delivered to Seller, at least thirty (30) days
     prior to Closing, any and all environmental reports on or concerning the
     Property that were prepared by Buyer or on Buyer's behalf; or (ii) has not
     prepared, or has not caused to be prepared, any environmental reports on or
     concerning the Property.

     (d) The License Agreement is in full force and effect, and there is no
     default thereunder by any party.

     6.11  Buyer Indemnity. Buyer agrees that after the Closing Date, Buyer will
           ---------------
indemnify, defend and hold Seller harmless from and against any and all costs,
losses, liabilities, damages, lawsuits, claims and expenses, including, without
limitation, attorneys' fees and expenses incurred in defending against same,
incurred in connection with, arising out of, or resulting from all risks
incumbent in ownership of real property (including, without limitation, all
environmental risks), except as expressly set forth in the Section hereof
entitled "Seller Indemnity". Without limiting the foregoing, Buyer agrees that
after the Closing Date, Buyer hereby assumes, and Buyer will indemnify, defend
and hold Seller harmless from and against any and all costs, losses,
liabilities, damages, lawsuits, claims and expenses, including, without
limitation, attorneys' fees and expenses incurred in defending against same,
incurred in connection with, arising out of, or resulting, whenever accruing or
arising, from (I) the Ground Lease and/or the License Agreement, and (ii) any
"environmental" claims, problems, liabilities or other matters affecting the
Property.

The provisions of this Section shall survive Closing or other termination of
this Agreement.

     6.12  Management of the Property. Until the Closing occurs, Seller shall
           --------------------------
have the right to manage the Property in a manner deemed reasonable in Seller's
sole discretion; Seller intends, but shall not be legally bound (other than as
expressly set forth in the Management Agreement) to retain Kilroy as Operator of
the Property until Closing. Buyer shall be unconditionally obligated to accept
the Property "as is", without reduction of the Purchase Price as the result of
any actual or alleged mismanagement of the Property prior to the Closing.

                                       21
<PAGE>
 
     6.13  Leasing. Until the Closing occurs, Seller shall have the right to
           -------
lease the Property in its sole discretion. Seller shall send a copy of the
proposed lease to Buyer for its approval, prior to execution (together with a
statement of the amount of the brokerage commission and the estimated amount of
the tenant improvements, if any, which will be due with respect to such lease),
which approval Buyer shall not unreasonably withhold or delay. If seller shall
not receive notice of objection from Buyer on or before 5 pm Central time five
(5) business days following Buyer's receipt of a proposed lease, Buyer shall be
conclusively deemed to have approved the proposed lease and the amount of the
brokerage commission set forth in Seller's notice (all leases set forth on
Exhibit "B-1" hereto, and all leases subsequently approved or deemed approved by
Buyer are referred to herein as "Approved Leases" and all commissions approved
or deemed approved by Buyer are referred to herein as "Approved Commissions";
and at Closing Exhibit "B-1" shall be amended to include all Approved Leases).
Because the benefits of new leases shall primarily accrue to the benefit of
Buyer, Buyer hereby agrees to reimburse Seller at Closing for all amounts
expended by Seller with respect to the Approved Leases for tenant improvements,
together with any Approved Commissions paid by Seller pursuant to the terms of
the Approved Leases from the Date of Agreement through the Closing Date
provided, however, that it is understood and agreed that Seller shall be solely
responsible for the cost of Approved Commissions and tenant improvements to
premises occupied by Urban Science Application under an Approved Lease. In
addition, except as otherwise set forth herein, Buyer hereby assumes all unpaid
obligations of the landlord that are required by the express written terms of
the Approved Leases (and all unpaid Approved Commissions due with respect to
such Approved Leases), including, without limitation, all unpaid obligations
required by the express written terms of the Approved Leases for tenant
improvements and other tenant concessions, Buyer agreeing to assume all tenant
improvement construction contracts for work required by the express written
terms of the Approved Leases which is in progress as of the Closing. This
provision shall survive the Closing.

     7.  Closing.
         -------

     As used herein, the term "Closing" shall refer to the later to occur of:
(i) the date on which the Escrowholder is authorized to record the Assignment
deposited in escrow by Seller; or (ii) the day on which Seller receives the
Purchase Price, adjusted in accordance with the provisions of the Section hereof
entitled "Prorations".

                                       22
<PAGE>
 
     7.1.  Buyer's Obligations. The obligations of Buyer with regard to Closing
           -------------------
under this Agreement are, at its option, subject to the fulfillment of each and
all of the following conditions prior to or at the Closing:

     (a) Seller shall have performed and complied with all the agreements and
     conditions required in this Agreement to be performed and complied with by
     Seller prior to Closing; and Escrowholder may deem all such items to have
     been performed and complied with when Seller has deposited all items in
     Escrow as required hereunder;

     (b) The Title Insurer shall have given to Buyer written confirmation that
     Title Insurer will issue its ALTA extended coverage Owner's Policy of Title
     Insurance in the amount of the Purchase Price showing title vested in Buyer
     subject only to the Permitted Exceptions and the usual exceptions found in
     said policy; and

     (c) The representations of Seller contained herein shall be true and
     correct in all material respects as of the Closing Date.

     (d) Seller having obtained the written consent of the City of Long
     Beach, California to the grant, conveyance and assignment of
     Seller's interest in the Ground Lease to Buyer.

     7.2  Seller's Obligations. The obligations of Seller with regard to Closing
under this Agreement are, at Seller's option, subject to the fulfillment of each
and all of the following conditions prior to or at the Closing:

     (a) Buyer performing and complying with all the agreements and conditions
     required by this Agreement to be performed and complied with by Buyer prior
     to Closing; and Escrowholder may deem all such items to have been performed
     and complied with when Buyer has deposited with Escrowholder all items
     required hereunder;

     (b) The results of Buyer's Environmental Report and Future Environmental
     Report, if any, shall be satisfactory to Seller in its sole discretion; and

     (c) The representations of Buyer contained herein shall be true and correct
     in all material respects on the Closing Date.

     7.3  Deposits in Escrow. On or before the Closing Date:
          ------------------

                                       23
<PAGE>
 
     7.3.1  Seller's Deposits. Seller shall deliver into escrow the following,
            -----------------
executed by a duly authorized officer of Seller:

     (a) The Assignment of Lessee's Interest in Ground Lease in the form as
         --------------
     Exhibit "A" attached hereto;

     (b) "FIRPTA" Affidavit in the form as Exhibit "E" attached hereto;
         ------------------ 

     (c) Certificate of Corporate Authorization in the form as Exhibit "F"
         --------------------------------------
     attached hereto;

     (d) Bill of Sale in the form as Exhibit "G" attached hereto;
         ------------

     (e) Seller's closing instructions to the Escrowholder; and
         -----------------------------

     (f) Seller's Certificate of Reaffirmation of Representations and Warranties
         -----------------------------------------------------------------------
     in the form as Exhibit "H" attached hereto;

     7.3.2  Buyer's Deposits. Buyer shall deliver into escrow the following,
            ----------------
executed by a duly authorized officer of Buyer:

     (i) The Purchase Price, less the Earnest Money then held by Escrowholder,
         ------------------
     plus costs to be paid by Buyer pursuant to the terms of this Agreement, and
     plus or minus prorations and adjustments shown on the Closing Statement
     executed by Buyer and Seller;

     (ii) Buyer's closing instructions to the Escrowholder; and
          ----------------------------

     (iii)  Buyer's Certificate of Reaffirmation of Representations and
            -----------------------------------------------------------
     Warranties in the form as Exhibit "I" attached hereto.
     ---------- 

     7.3.3  Joint Deposits. Buyer and Seller shall jointly deposit with
            --------------
Escrowholder the following documents, each executed by persons or entities duly
authorized to execute same on behalf of Buyer and Seller:

     (a) Closing Statement prepared by Escrowholder for approval by Buyer and
         -----------------
     Seller two (2) business days prior to the Closing Date and such Closing
     Statements shall be deposited with Escrowholder after the same have been
     executed by Buyer and Seller;

                                       24
<PAGE>
 
     (b) Assignment and Assumption of Tenant Leases in the form of Exhibit "B"
         ------------------------------------------
     attached hereto; and

     (c) Assignment and Assumption of Contracts and Other Obligations in the
         ------------------------------------------------------------
     form attached as Exhibit "J" hereto, pursuant to which Seller assigns and
     Buyer assumes all of Seller's interest in maintenance and service
     contracts, licenses, real estate tax refunds and equipment leases (except
     insurance policies and the Management Agreement, which shall terminate at
     Closing). Kilroy shall join in the execution of the Assignment and
     Assumption of Contracts and Other Obligations to evidence the termination
     of the Management Agreement.

     7.3.4  Other Documents. Buyer, Seller and Escrowholder shall deposit with
            ---------------
Escrowholder all other documents which are required to be deposited in Escrow by
the terms of this Agreement.

     7.4  Costs. Seller and Buyer shall each pay one half of the cost of a
          -----
standard ALTA extended coverage Owner's Title Insurance Policy, but Buyer shall
pay the cost of all endorsements to such owner's policy. Seller shall pay to the
Broker the Broker's Commission referred to in Section hereof entitled "Basic
Terms". If applicable, Broker shall pay to any co-broker the commission or fee
agreed to between Broker and co-broker. Buyer and Seller shall each pay one-half
of the Escrowholder's charge for the Escrow, if any. Buyer and Seller shall
share equally the cost of realty transfer or stamp taxes, and recording fees.
Buyer shall pay the cost of a survey, and all other costs and expenses of the
sale and Closing, except that the Buyer and Seller shall each pay its own legal
fees incurred in connection with the drafting and negotiating of this Agreement
and the Closing of the transaction contemplated herein.

     7.5  Title Insurance. As a condition to Closing, Buyer shall receive the
          ----------------
written assurance of the Title Insurer that it will issue to Buyer an ALTA
extended coverage Owner's Title Insurance Policy, which policy shall contain all
endorsements agreed upon between Buyer and Title Insurer and shall insure title
to the Property in the amount of the Purchase Price and showing title vested in
Buyer subject only to the "Permitted Exceptions" (as defined in the Section
hereof entitled "Title").

     7.6  Prorations. The following items shall be prorated between Buyer and
          ----------
Seller as of the Closing Date:

                                       25
<PAGE>
 
     (a) Taxes and Assessments. General real estate taxes and assessments and
         ---------------------  
     other similar charges which are a lien on the Property, but not yet due and
     payable as of the Closing Date. The prorations shall be based upon the most
     recent tax bill and will be final. Any assessments levied against the
     Property which are payable on an installment basis and which installments
     are due, payable and outstanding on the Closing Date shall be paid by
     Seller on the Closing Date, except that where general real estate taxes,
     assessments, utilities and other expenses are paid by the Tenant under the
     Lease, no proration will be made.

     (b) Rentals. Other Income and Expenses. Rentals and other amounts and items
         ----------------------------------
     of income relating to the Property, including prepaid rents and percentage
     rentals. Buyer shall, at Closing, purchase accounts receivable relating to
     the Property from Seller by a price equal to the following percentage of
     such outstanding accounts receivable:

         100% of the amount of accounts receivable less than 31 days
         old;
         95% of the amount of accounts receivable 31 to 60 days old;
         90% of the amount of accounts receivable at least 61 to 90
         days old; and
         80% of the amount of accounts receivable over 90 days old.

     (c) Expenses. All expenses of operating the Property which have been
         --------
     prepaid by Seller (except insurance pursuant to Section hereof entitled
     "Insurance").

     (d) Security Deposits. All security and other deposits of Tenant(s) not
         -----------------  
     heretofore applied, together with accrued interest, if any, shall be
     credited to Buyer at the Closing.

     (e) Utilities. Seller shall receive credit for any assignable utility
         ---------
     deposits, if any, which are assigned to Buyer at Buyer's request or with
     Buyer's consent. To the extent possible, Seller shall cause all electric,
     gas and water meters which are not payable by Tenants, to be read as of the
     Closing Date, and Seller shall pay all charges for electricity and water
     which have accrued to and including the day of Closing and Buyer shall pay
     all such expenses accruing after the Closing Date.

                                       26
<PAGE>
 
     (f) Leasing Reimbursements. Seller shall receive a credit from Buyer at
         ----------------------
     Closing for certain leasing expenses, to the extent any exist, required by
     the provisions of the Section hereof entitled "Leasing".

Buyer and Seller agree to estimate any amounts which cannot be determined
accurately as of the Closing Date. All of the foregoing prorations shall be
final as of the Closing Date. Prorations and adjustments shall be made by
credits to or against the Purchase Price. Expenses incurred in operating the
Property that Seller customarily pays and any other costs incurred in the
ordinary course of business or the management and operation of the Property
shall be prorated on an accrual basis. For purposes of calculating prorations,
Seller shall be deemed to be entitled to the income and responsible for the
expenses for the entire day upon which the Closing occurs. All apportionments
shall be made ill accordance with customary practice in the county in which the
Property is located, except as expressly provided herein; in the event of
dispute between Buyer and Seller, the advice of the Title Insurer shall be
determinative as to what is customary.

     7.7  Insurance. The fire, hazard and other insurance policies relating to
          ---------
the Property shall be canceled by Seller as of the Closing Date and shall not,
under any circumstances, be assigned to Buyer. All unearned premiums for fire
and any additional hazard insurance premium or other insurance policy premiums
with respect to the Property shall be retained by Seller.

     7.8  Close of Escrow. Subject to the provisions of the Section below
          ---------------
entitled "Wire Transfer", pursuant to the terms of this Agreement, as soon as
Buyer and Seller have deposited all items required with Escrowholder, and upon
satisfaction of the Sections hereof entitled "Buyer's Obligations" and "Seller's
Obligations", Escrowholder shall cause the Closing to occur in accordance with
the terms hereof by immediately:

     (a) Wire Transfer. Wire transferring the Purchase Price (including the
         -------------
     Earnest Money held by Escrowholder, but less the Broker's Commission, and
     the amount of costs paid by Seller at Closing, and plus or minus the amount
     of any prorations pursuant to the terms hereof, all as set forth on the
     Closing Statement signed by Seller) to Seller directly as follows:

                          Firstar Bank Milwaukee, N.A.
                              Milwaukee, Wisconsin
                             ABA Number 0750 0002 2

                                       27
<PAGE>
 
                               for the account of
                 The Northwestern Mutual Life Insurance Company
                             Account No. 111000978
                               Attn: Donna Butler
                                   SRE 331269

     Provided, however, that if, in the opinion of the Escrowholder, such wire
     transfer cannot be accomplished so that the Seller will receive the wire
     transfer on or before 11 am Central Time on the date otherwise set for
     Closing, at the sole discretion of Seller, said Closing shall be delayed
     one business day with appropriate adjustments to the prorations but without
     releasing Buyer or Seller from their obligations hereunder.

     (b) Recordation. Recording the Assignment;
         -----------

     (c) Delivery of Other Escrowed Documents.
         ------------------------------------

         (I)   Joint Delivery. Delivering to each of Buyer and Seller at least
         one executed counterpart of each of the (i) Assignment and Assumption
         of Leases, (ii) the Closing Statement;

         (II)   Buyer's Delivery. Delivering to Buyer the (i) Bill of Sale,
         (ii) FIRPTA affidavit, (iii) Certificate of Corporate Authorization,
         and (iv) Seller's Certificate of Reaffirmation of Representations and
         Warranties.

         (Ill)  Seller's Delivery. Delivering to Seller Buyer's Certificate of
         Reaffirmation of Representations and Warranties.

     (d) Broker's Commission. Delivering to Broker the Broker's Commission for
         -------------------
     services rendered to Seller, as reflected on the Closing Statement executed
     by Seller and Buyer. In the event there is a co-broker, Broker shall be
     responsible for delivering to any co-broker the commission agreed to
     between Broker and co-broker and neither Buyer nor Seller shall have any
     responsibility for payment of any commission or fee to any co-broker.

     7.9 Deliveries to Buyer. As soon as reasonably possible after the Closing,
         -------------------
Seller shall deliver the following to Buyer:

                                       28
<PAGE>
 
     (a) Tenant Lease(s). The original of each Tenant Lease and any amendments
         ---------------
     thereto (if available), or a copy of each Tenant Lease and any amendments
     thereto in the possession of Seller, if not previously delivered to Buyer.

     (b) Contracts. The originals of all Contracts in the possession of Seller
         ---------
     that have been assigned to and assumed by Buyer.

     (c) Keys. Any keys to any door or lock on the Property in the possession of
         ----
     Seller.

     (d) Licenses and Permits. All original licenses or permits or certified
         --------------------
     copies thereof issued by governmental authorities having jurisdiction over
     the Property which Seller has in its possession and which are transferable.

     (e) Tenant Notice(s). Copies of the Tenant Notice(s) distributed by Seller
         ----------------
     via US. Mail or other delivery service selected by Seller to the Tenant(s)
     of the Property, advising the Tenant(s) of the sale of the Property to
     Buyer and directing the Tenant(s) to pay future rents to Buyer.

     7.10  Recorded Instruments. As soon after the Closing as possible,
           --------------------
Escrowholder shall deliver to Buyer the original recorded Assignment, and shall
deliver to Seller a copy of the recorded Assignment, with recordation
information noted thereon.

     7.11  Possession. As of the Close Date, possession of the Property shall be
           ----------
delivered to Buyer subject to any right of possession under any items described
in the Assignment.

     8.  Casualty.
         --------

     In the event of any loss or damage by fire or other casualty to the
Property prior to the Closing which is not material, Closing shall be
consummated just as if such loss or damage had not occurred, and Seller shall
deliver to Buyer any and all proceeds paid to Seller by Seller's insurer with
respect to such casualty. At Closing, Seller shall give Buyer a credit on the
Purchase Price in the amount of any deductible. In the event of any material
loss or damage by fire or other casualty to the Property prior to the Closing,
at Buyer's sole option, either:

                                       29
<PAGE>
 
     (a) This Agreement shall terminate in accordance with the Section hereof
     entitled "Non Default Termination" if Buyer shall so notify Seller within
     ten (10) business days of Buyer having actual knowledge of the casualty; or

     (b) If Buyer shall not have timely notified Seller of its election to
     terminate this Agreement in accordance with Subsection (a) above, Closing
     shall be consummated just as if such loss or damage had not occurred,
     without reduction in the Purchase Price, and Seller shall deliver to Buyer
     any and all proceeds paid to Seller by Seller's insurer with respect to
     such casualty. At Closing, Seller shall give Buyer a credit on the Purchase
     Price in the amount of any deductible.

For purposes of the foregoing, a casualty shall be deemed to be material if the
estimated cost of restoration exceeds the Materiality Limit.

     9.  Condemnation.
         ------------

     In the event of any condemnation or taking of all or a part of the Property
prior to the Closing which is not material, Closing shall be consummated just as
if such loss or damage had not occurred, and Seller shall assign to Buyer all of
Seller's interest in any condemnation actions and proceeds. In the event of any
material condemnation of all or a part of the Property prior to the Closing at
Buyer's sole option, either:

     (a) This Agreement shall terminate in accordance with the Section hereof
     entitled "Non Default Termination" if Buyer shall so notify Seller within
     ten (10) business days of Buyer having actual knowledge of the
     condemnation; or

     (b) If Buyer shall not have timely notified Seller of its election to
     terminate this Agreement in accordance with Subsection (a) above, Closing
     shall be consummated just as if such loss or damage had not occurred,
     without reduction in the Purchase Price, and Seller shall assign to Buyer
     all of Seller's interest in any condemnation actions and proceeds.

For purposes of the foregoing, a condemnation or taking shall be deemed to be
material if the value of the Property taken, as determined by the condemning
authority, exceeds the Materiality Limit.

                                       30
<PAGE>
 
     10.  Notices. All notices which are required or permitted hereunder must be
          -------
in writing and shall be deemed to have been given, delivered or made, as the
case may be, (i) when delivered by personal delivery; (ii) three (3) business
days after having been deposited in the United States mail, certified or
registered, return receipt requested, sufficient postage affixed and prepaid,
property addressed; or (iii) one (1) business day after having been deposited
with a nationally recognized overnight courier service (such as, by way of
example but not limitation, U.S. Express Mail, UPS, Federal Express or
Purolator), addressed to the party to whom notice is intended to be given at the
address set forth in the Basic Terms, or to such other address as either party
may from time to time designate by written notice given to the other party;
provided, however that no party may require notice be given to more than 3
addresses.

     11.  Successors and Assigns.
          ----------------------  

     This Agreement shall inure to the benefit of and be binding upon the
respective successors and assigns of the parties hereto; provided, however, that
Buyer shall not transfer, sell, or assign all or any portion of Buyer's rights
under this Agreement, provided, however that Buyer may, with at least five (5)
business days prior notice, direct Seller to cause title to be vested in an
affiliate of Buyer.

     12.  Brokers.
          -------

     Buyer and Seller represent to each other that they have dealt with no
broker or other person except the Broker, in connection with the sale of the
Property in any manner which might give rise to any claim for commission. Seller
agrees to be responsible for payment of Broker's fees only and has not, nor
will, assume any liability with respect to any fee or commission payable to any
co-broker or any other party. No broker or person other than Broker is entitled
to receive any broker's commissions, finder's fees, or similar compensation from
Seller in connection with any aspect of the transaction contemplated herein. It
is agreed that if any claims for brokerage commissions or fees are ever made
against Seller or Buyer in connection with this transaction, all such claims
shall be handled and paid by the party whose actions or alleged commitments form
the basis of such claim. The party against whom the claim for such fees is made
shall indemnify and hold the other party harmless against and in respect of any
claim for brokerage or finder's fees or other like payment based in any way upon
agreements, arrangements, or understandings made or claimed to have been made by
Buyer or Seller with any third person.

                                       31
<PAGE>
 
     13.  Covenant not to Record.
          ----------------------

     Buyer will not record this Agreement or any memorandum or other evidence
thereof. Any such recording shall constitute a material default hereunder on the
part of Buyer.

     14.  Default
          -------

     It is agreed by both Seller and Buyer that the remedies for default are
provided for in the following Sections and shall constitute the sole and
exclusive remedies of the aggrieved party in the event of default by the other
party. Without limiting the foregoing, in no event shall Seller have any
liability for damages whatsoever.

     14.1  Default by Buyer. In the event of default by Buyer, Seller's sole and
           ----------------
exclusive remedy, except as set forth further in this Section, is to retain all
Earnest Money (including all interest thereon) and all money paid on account of
the Purchase Price as liquidated damages, in which event this Agreement shall
become null and void and both parties shall thereupon be released of all further
liability hereunder. Such amount is agreed upon by and between Seller and Buyer
as liquidated damages acknowledging the difficulty and inconvenience of
ascertaining and measuring actual damages, and the uncertainty thereof; provided
that nothing herein contained shall limit the right of Seller to seek damages
from Buyer due to any slander of title by Buyer after the termination of this
agreement, or due to any other action taken by Buyer with respect to the
Property after the termination of this Agreement, no other damages, rights or
remedies shall in any case be collectible, enforceable or available to Seller
other than as defined in this Section.

     14.2  Default by Seller. In the event of default by Seller, Buyer may elect
           -----------------
either: (i) to terminate this Agreement and receive from Seller reimbursement of
the Earnest Money (including all interest thereon) and money paid on account of
the Purchase Price; or (ii) to proceed with an action for specific performance
of Seller's express obligations hereunder. Seller shall not be obligated to
return Earnest Money (including all interest thereon) to Buyer unless Buyer
gives Seller written notice terminating all of Buyer's interest in the Property
and this Agreement; provided, however, that failure of Buyer to give Seller such
notice shall not be construed to expand Buyer's rights or remedies in any
manner.

                                       32
<PAGE>
 
     15.   Non-Default Termination.
           -----------------------

     In the event of any termination of this Agreement (except only a
termination of this Agreement to which the Section hereof entitled "Default" is
applicable), the following provisions shall apply:

     (a)   All Obligations Terminate. Except for those obligations which 
           -------------------------
           expressly survive termination of this Agreement, neither Buyer nor
           Seller shall have any further obligations hereunder after termination
           of this Agreement.

     (b)   Return of Earnest Money. The Earnest Money plus accrued interest 
           -----------------------
           shall be returned to Buyer upon Seller's receipt of written notice
           from Buyer terminating this Agreement, expressly acknowledging the
           termination of all of Buyer's interest in the Property and this
           Agreement; provided, however, that failure of Buyer to give Seller
           such notice shall not be construed to expand Buyer's rights or
           remedies in any manner.

     16.   Miscellaneous.
           -------------

     16.1  Survival of Representations, Covenants, and Obligations. Except as
           -------------------------------------------------------
otherwise expressly provided herein, no representations, covenants, or
obligations contained herein made by Seller or Buyer shall survive Closing or
termination of this Agreement.

     16.2  Attorneys' Fees. In the event of any litigation between the parties
           ----------------
hereto concerning the terms hereof, the losing party shall pay the reasonable
attorneys' fees and costs incurred by the prevailing party in connection with
such litigation, including appeals.

     16.3  Publicity. Except to the extent that Buyer would be in violation of
           ---------
any law and except as set forth in Section 6.1(a) hereof, Buyer agrees that it
shall (i) treat this transaction strictly confidentially prior to Closing (ii)
make no public announcement of the transactions contemplated herein and (iii)
neither directly nor indirectly contact the Property's vendors or contractors
until after Closing occurs. Neither party will publicly advertise or announce
the facts of the sale of the Property, except by mutual written consent, until
after the Closing Date. In no event will either party advertise or announce the
terms of this Agreement, except by mutual written consent.

                                       33
<PAGE>
 
     16.4  Captions. The Section headings or captions appearing in this
           --------
Agreement are for convenience only, are not a part of this Agreement, and are
not to be considered in interpreting this Agreement.

     16.5  Waiver. No waiver by any party of any breach hereunder shall be
           ------
deemed a waiver of any other or subsequent breach.

     16.6  Time. Time is of the essence with regard to each provision of this
           ----
Agreement. If the final date of any period provided for herein for the
performance of an obligation or for the taking of any action falls on a
Saturday, Sunday or banking holiday, then the time of that period shall be
deemed extended to the next day which is not a Sunday, Saturday or banking
holiday.

     16.7  Controlling Law. This Agreement shall be construed in accordance with
           ---------------
the laws of the state of California.

     16.8  Severability. In the event that any one or more of the provisions of
           ------------
this Agreement shall be determined to be void or unenforceable by a court of
competent jurisdiction or by law, such determination will not render this
Agreement invalid or unenforceable, and the remaining provisions hereof shall
remain in full force and effect.

     16.9  Construction. Buyer and Seller agree that each party and its counsel
           ------------
(if applicable) have reviewed, and if necessary, revised this Agreement, and
that the normal rule of construction to the effect that any ambiguities are to
be resolved against the drafting party shall not be employed in the
interpretation of this Agreement or any amendments, exhibits or schedules
hereto.

     16.10 Finance Committee Approval. The obligations of Seller hereunder are
           --------------------------
subject to Seller obtaining appropriate authorization from its Finance Committee
and all other necessary authority to perform its obligations under this
Agreement, to proceed to close the transaction contemplated hereby, and to
execute and deliver all documents to be executed by Seller and Buyer pursuant
hereto. In the event Seller has not obtained such approval on or before the
Approval Date, Either Buyer or Seller may terminate this Agreement in accordance
with the Section hereof entitled "Non-Default Termination".

     16.11 Execution. This Agreement may be executed in any number of
           ---------
counterparts, each of which, when so executed and delivered, shall be

                                       34
<PAGE>
 
deemed an original, but such counterparts together shall constitute but one
agreement.

     16.12  Amendments. This Agreement may be amended only by a written
            ----------
instrument executed by Buyer and Seller.

     16.13  Entire Agreement. This written Agreement constitutes the entire and
            ----------------
complete agreement between the parties hereto and supersedes any prior oral or
written agreements between the parties with respect to the Property.

     16.14  Exhibits. The following Exhibits are attached hereto and made a part
            --------
hereof:

     Exhibit A - Assignment of Lessee's Interest in Ground Lease
     Exhibit B - Assignment and Assumption of Leases
     Exhibit C - Existing Environmental Reports
     Exhibit D - Exceptions to Representations and Warranties
     Exhibit E - "FIRPTA Affidavit"
     Exhibit F - Certificate of Authorization
     Exhibit G - Quit Claim Bill of Sale
     Exhibit H - Seller's Certificate of Reaffirmation of Representations
     Exhibit I - Buyer's Certificate of Reaffirmation of Representations
     Exhibit J - Assignment and Assumption of Contracts and Other Obligations
     Exhibit K - Access and Indemnification Agreement

                                       35
<PAGE>
 
     IN WITNESS WHEREOF, this Agreement has been executed as of the Date of
Agreement, as herein defined in the Section entitled "Basic Terms."

          SELLER:              THE NORTHWESTERN MUTUAL
                               LIFE INSURANCE COMPANY

                            By:   /s/ Robert M. Ruess
                                --------------------------
                                  Robert M. Ruess

                            Its:  Vice President
                                 -------------------------

                            Date: September 3, 1996
                                  ------------------------       [LAW DEPARTMENT
                                                                  STAMP APPEARS
          BUYER:               KILROY INDUSTRIES                  HERE]

                            By:   [SIGNATURE APPEARS HERE]
                                --------------------------

                            Its: -------------------------

                            Date: ------------------------

                                       36
<PAGE>
 
                                   Exhibit A

                ASSIGNMENT OF LESSEE'S INTEREST IN GROUND LEASE


THIS ASSIGNMENT OF LESSEE'S INTEREST IN GROUND LEASE is made as of this _____
day of __________, 1996 between THE NORTHWESTERN MUTUAL LIFE INSURANCE COMPANY,
a Wisconsin corporation, ("Assignor") and KILROY INDUSTRIES, a
________________________________, ("Transferee").


Assignor, in consideration of the sum of Ten ($10.00) Dollars and other good and
valuable consideration from Transferee, the receipt whereof is hereby
acknowledged, hereby GRANTS, CONVEYS and ASSIGNS to Assignee the following
"Estate":

     (a)  the interest of the "Developer" in the "Ground Lease" (the
          "Property"); and

     (b)  Assignor's interest in any improvements (the "Improvements") situated
          on the Property; and

     (c)  assignor's interest in any and all other right, title, and interest of
          Assignor in and to the Property.

     "Ground Lease" means that certain Lease Agreement made the 24th day of
January 1989 by and between Kilroy Long Beach Associates, as "Developer", and
the City of Long Beach, as Landlord; a Short Form of Ground Lease was recorded
in Los Angeles County, California, on January 31, 1989 as Document No. 89 
 159802.

     "Developer" has the meaning defined for it in the Ground Lease.

     Assignor hereby warrants to Assignee for itself and its successors and
assigns, that:

     (a)  as of the date hereof, Assignor has not conveyed the Estate, or any
          right, title or interest therein, to any person other than Assignee;
          and,

                                       37
<PAGE>
 
     (b)  the Estate is, as of the date hereof, free from encumbrances done,
          made, or suffered by Assignor, or any person claiming under Assignor,
          except only for the rights of the Lessor under the Ground Lease.

PROVIDED, HOWEVER, that Assignor shall have no liability whatsoever with respect
to:

     1.   Real Estate Taxes not yet due and payable;

     2.   General and Special Assessments payable after the date hereof;

     3.   Liens, claims, easements, covenants, restrictions, encumbrances and
     other matters of record;

     4.   Zoning and other laws, ordinances and regulations;

     5.   Public Utility, Drainage and Highway easements, whether or not of
     record;

     6.   Rights of parties in possession;

     7.   Encroachments and other matters which would be disclosed by an
     accurate survey or an inspection of the above premises; and,

     8.   Consequences of any attack on the title conveyed hereunder under any
     creditor's rights law, including state insolvency law and federal
     bankruptcy law.

                                       38
<PAGE>
 
     IN WITNESS WHEREOF, said The Northwestern Mutual Life Insurance Company,
has caused these presents to be executed by ______________________, Vice
President thereof, and attested by its Assistant Secretary pursuant to authority
duly conferred on such officers by its Board of Trustees.

                                        THE NORTHWESTERN MUTUAL
                                        LIFE INSURANCE COMPANY
                                        720 East Wisconsin Avenue
                                        Milwaukee, Wisconsin 53202


                                        By:
                                               -------------------------
                                               Vice President

                                        Attest:
                                               -------------------------
                                               Assistant Secretary

On this _______ day of _____,1996, the City of Long Beach, as Landlord under the
Ground Lease, hereby acknowledges the GRANT, CONVEYANCE and ASSIGNMENT to Kilroy
Industries set forth herein and further agrees that it is a permitted sale,
transfer and assignment of the estate described herein.


                                                  THE CITY OF LONG BEACH
                                                  
                                                  By:
                                                     -------------------------

                                       39
<PAGE>
 
STATE OF WISCONSIN  )
                    ) SS.
COUNTY OF MILWAUKEE )

On this______ day of____________, A.D., 19__, before me appeared
_________________________________________ and __________________________ Vice
President and Assistant Secretary, respectively, of The Northwestern Mutual Life
Insurance Company, who are personally to me known and known to me to be such
Vice President and Assistant Secretary and to be the same persons who, as such
officers, executed the foregoing instrument of writing in the name of said
corporation and duly and severally acknowledged the execution thereof as the
free act and deed of said corporation.

And then and there the said ________________ and __________________,being by me
first duly sworn, did say, each for himself, that the said ________________ is
Vice President and the said ________________ is Assistant Secretary of The
Northwestern Mutual Life Insurance Company, that the seal affixed to the
foregoing instrument is the corporate seal of said corporation and that said
instrument was signed and sealed in its behalf by authority of its Board of
Trustees.


_________________________________

Notary Public, State of Wisconsin
My Commission expires: ________



This instrument was prepared for THE NORTHWESTERN MUTUAL LIFE
INSURANCE COMPANY by _______________, Attorney, 720 East
Wisconsin Avenue, Milwaukee, Wisconsin 53202.

                                       40
<PAGE>
 
                                   Exhibit A
                               Legal Description



                                                            
PARCELS 1 AND 2 OF PARCEL MAP NO. 16960, IN THE CITY OF LONG BEACH, COUNTY OF
LOS ANGELES, STATE OF CALIFORNIA, AS PER MAP FILED IN BOOK 208 PAGES 92 THROUGH
100 INCLUSIVE OF PARCEL MAPS, IN THE OFFICE OF THE COUNTY RECORDER OF SAID
COUNTY, TOGETHER WITH IMPROVEMENTS LOCATED THEREON.

EXCEPT THEREFROM ALL OIL, GAS, AND OTHER HYDROCARBONS IN AND UNDER, OR WHICH MAY
BE PRODUCED OR SAVED FROM SAID LAND, TOGETHER WITH ALL RIGHTS OF EVERY KIND AND
DESCRIPTION WHATSOEVER TO DRILL FOR, DEVELOP, TAKE, REMOVE, AND SEVER THE SANE,
OR ANY PART THEREOF, FROM SAID LAND, WITHOUT, HOWEVER, THE RIGHT TO THE USE OF
THE SURFACE OF SAID LAND IN CONNECTION WITH THE DEVELOPMENT OR REMOVAL OF SAID
OIL, GAS OR OTHER HYDROCARBONS, ALL DRILLING AND BORING FOR SAID PURPOSES TO BE
DONE BENEATH THE SURFACE OF SAID LAND AT ANY LEVEL, 100 FEET, OR MORE, BELOW THE
SURFACE THEREOF, THE SURFACE OPENING OF THE WELL HOLE TO BE LOCATED ON LAND
OTHER THAN THE LAND ABOVE DESCRIBED, AS RESERVED IN THE DEED FROM BIXBY LAND
COMPANY, A CORPORATION, RECORDED AUGUST 25, 1948 IN BOOK 28072 PAGE 204,
OFFICIAL RECORDS, AND RECORDED FEBRUARY 10, 1950 IN BOOK 32238 PAGE 67, OFFICIAL
RECORDS, AND RECORDED DECEMBER 28, 1950 IN BOOK 35178 PAGE 303, OFFICIAL
RECORDS, AND RECORDED DECEMBER 28, 1950 IN BOOK 35179 PAGE 310, OFFICIAL
RECORDS.

                                       41
<PAGE>
 
                                   EXHIBIT B

                      Assignment and Assumption of Leases


     BY THIS AGREEMENT, made this ______day of_________, 1996, The Northwestern
Mutual Life Insurance Company, a Wisconsin corporation, ("Assignor"), and Kilroy
Industries, a ______________ ("Assignee"), confirm and agree as follows:

                                       I.
                                    RECITALS

     1.1  Assignor has agreed to sell its interest in the Property the real
property described on Schedule 2 (the "Property") to Assignee on or before
___________________________________ , 199__

     1.2  Assignor desires to assign to Assignee and Assignee desires to acquire
the Assignor's interest under the leases described on Schedule I (the "Leases"),
effective upon the closing of the sale described in 1.1 above (the "Closing").

                                      II.
                                   AGREEMENT

     2.1  In consideration of the sum of Ten Dollars ($10.00) paid by Assignee,
the receipt of which is hereby acknowledged, the Assignor hereby assigns to
Assignee, all of its interest in the Leases, subject to the terms, covenants,
provisions, and conditions set forth therein.

     2.2  In order to induce Assignor to execute and deliver this instrument and
to assign the interest hereby conveyed, Assignee covenants with the Assignor as
follows:

     a)  To promptly pay or cause to be paid to the person or persons,
     corporations, who from time to time may be entitled thereto, all taxes and
     assessments, and all other amounts of any nature provided by the terms of
     such Leases to be paid by the landlord;

     b)  To assume, keep, observe, and perform duly and punctually, all of the
     terms, covenants, provisions, and conditions contained in such Leases on
     the part of the landlord to be kept, observed, and performed

                                       42
<PAGE>
 
     in the same manner and with the same effect as though Assignee were the
     original and named landlord to such leases, and specifically Assignee
     agrees to pay to the existing and future tenants all sums that have been or
     may be collected as security deposits if such payments are required in
     accordance with the terms of such leases;

     c)  To indemnify Assignor against any claims arising under such Leases
     subsequent to the date of Closing.

     IN WITNESS WHEREOF, Assignor and Assignee by their proper officers
thereunder duly authorized, have executed these presents as of the day and year
first hereinabove written.

          Assignor:  THE NORTHWESTERN MUTUAL LIFE INSURANCE COMPANY

                         By: 
                            -------------------------------
                         Its:       Vice President

                         Attest: 
                                ---------------------------
                         Its:       Assistant Secretary

          Assignee:  KILROY INDUSTRIES 

                         By: 
                            ------------------------------- 

                         Its: 
                             ------------------------------

                         Attest: 
                                ---------------------------

                         Its:
                             ------------------------------

                                       43
<PAGE>
 
STATE OF WISCONSIN   )
                     ) ss.
COUNTY OF MILWAUKEE  )

The foregoing instrument was acknowledged before me this_____day of
______________, 199__, __________________ and ___________ the Vice
President and Assistant Secretary respectively, of The Northwestern Mutual Life
Insurance Company, and acknowledged the execution of the foregoing instrument as
the act and deed of said corporation.


- ----------------------------------

Notary Public
My commission expires:




STATE OF             )
                     ) ss.
COUNTY OF)


The foregoing instrument was acknowledged before me this ______ day of
____________, 199__, _____________ and _____________ the Vice President and
Assistant Secretary respectively, of ______________________________________
and acknowledged the execution of the foregoing instrument as the act and deed
of said trust.


- ----------------------------------

Notary Public
My commission expires:

                                       44
<PAGE>
 
                                   SCHEDULE 1
                  ASSIGNMENT OF LANDLORD'S INTEREST IN LEASES

                                 List of Leases

Leases between The Northwestern Mutual Life Insurance Company, as assignee of
the interests of Kilroy Long Beach Associates and

1.  Olympus America, Inc.

2.  McDonnell Douglas Corporation

3.  Federal Express

4.  Lanier Worldwide

5.  Urban Science Application

6.  Chilton Company


Leases between The Northwestern Mutual Life Insurance Company and

1.  Leviton Manufacturing Company

2.  De Vry, Inc.

                                       45
<PAGE>
 
                                   SCHEDULE 2
                      ASSIGNMENT AND ASSUMPTION OF LEASES

                               Legal Description


PARCELS 1 AND 2 OF PARCEL MAP NO. 16960, IN THE CITY OF LONG BEACH, COUNTY OF
LOS ANGELES, STATE OF CALIFORNIA, AS PER MAP FILED IN BOOK 208 PAGES 92 THROUGH
100 INCLUSIVE OF PARCEL MAPS, IN THE OFFICE OF THE COUNTY RECORDER OF SAID
COUNTY, TOGETHER WITH IMPROVEMENTS LOCATED THEREON.

EXCEPT THEREFROM ALL OIL, GAS, AND OTHER HYDROCARBONS IN AND UNDER, OR WHICH
MAY BE PRODUCED OR SAVED FROM SAID LAND, TOGETHER WITH ALL RIGHTS OF EVERY KIND
AND DESCRIPTION WHATSOEVER TO DRILL FOR, DEVELOP, TAKE, REMOVE, AND SEVER THE
SAME, OR ANY PART THEREOF, FROM SAID LAND, WITHOUT, HOWEVER, THE RIGHT TO THE
USE OF THE SURFACE OF SAID LAND IN CONNECTION WITH THE DEVELOPMENT OR REMOVAL OF
SAID OIL, GAS OR OTHER HYDROCARBONS, ALL DRILLING AND BORING FOR SAID PURPOSES
TO BE DONE BENEATH THE SURFACE OF SAID LAND AT ANY LEVEL, 100 FEET, OR MORE,
BELOW THE SURFACE THEREOF, THE SURFACE OPENING OF THE WELL HOLE TO BE LOCATED ON
LAND OTHER THAN THE LAND ABOVE DESCRIBED, AS RESERVED IN THE DEED FROM BIXBY
LAND COMPANY, A CORPORATION, RECORDED AUGUST 25, 1948 IN BOOK 28072 PAGE 204,
OFFICIAL RECORDS, AND RECORDED FEBRUARY 10, 1950 IN BOOK 32238 PAGE 67, OFFICIAL
RECORDS, AND RECORDED DECEMBER 28, 1950 IN BOOK 35178 PAGE 303, OFFICIAL
RECORDS, AND RECORDED DECEMBER 28, 1950 IN BOOK 35179 PAGE 310, OFFICIAL
RECORDS.

                                       46
<PAGE>
 
                                   EXHIBIT C

                         Existing Environmental Reports

1.  Environmental Assessment Report performed by Targhee, Incorporated, dated
May 19, 1988 and corollary documents under cover letter from Targhee,
Incorporated, dated July 14, 1988.

2.  Environmental Site Assessment performed by CTL Environmental
Services for the Northwestern Mutual Life Insurance Company, dated
August 3, 1993.

3.  Phase I Environmental Site Assessment performed by CTL Environmental
Services for The Northwestern Mutual Life Insurance Company, dated
June 3, 1993.

                                       47
<PAGE>
 
                                   EXHIBIT D

             Exceptions to Seller's Representations and Warranties



                                      NONE

                                       48
<PAGE>
 
                                   EXHIBIT E

                              "FIRPTA" Affidavit

     Section 1445 of the Internal Revenue Code provides that a transferee of a
U.S. real property must withhold tax if the transferor is a foreign person. To
inform the transferee that withholding of tax is not required upon the
disposition of a U.S. real property interest by The Northwestern Mutual Life
Insurance Company, the undersigned hereby certifies the following on behalf of
The Northwestern Mutual Life Insurance Company.

     1.   The Northwestern Mutual Life Insurance Company is a Wisconsin
          corporation and is not a foreign corporation;

     2.   The Northwestern Mutual Life Insurance Company's U.S. employer
          identification number is 39-0509570; and

     3.   The Northwestern Mutual Life Insurance Company's home office address
          is 720 East Wisconsin Avenue, Milwaukee, WI 53202.

     The undersigned understands that this certification may be disclosed to the
Internal Revenue Service by transferee and that any false statement contained
herein could be punished by fine, imprisonment or both.

     Under penalty of perjury, I declare that I have examined this certificate
and to the best of my knowledge and belief, it is true, correct and complete,
and I further declare that I have authority to sign this document on behalf of
The Northwestern Mutual Life Insurance Company.


                               THE NORTHWESTERN MUTUAL 
                               LIFE INSURANCE COMPANY

Dated:                         By:                            
      ------------------          ------------------------------
                               Its:                             
                                   -----------------------------  

                                       49
<PAGE>
 
                                   EXHIBIT F

                     CERTIFICATE OF CORPORATE AUTHORIZATION

     I, ____________________, do hereby certify that I am an Assistant Secretary
of The Northwestern Mutual Life Insurance Company, a Wisconsin corporation (the
"Company"); and that the following are true and correct excerpts from the By-
Laws of the Company, now in full force and effect, relating to the powers of the
Finance Committee of the Company and the execution of instruments on behalf of
the Company:

          "Section 2.6 Finance Committee. (a) COMPOSITION AND POWERS. The
                       -----------------      ----------------------
          finance committee shall consist of such number of trustees as the
          board may determine, to be elected annually by the board, plus the
          chairman of the board, if any, and the president, if a trustee. When
          the board is not in session, the finance committee shall have and may
          exercise all of the powers of the board in regard to the assets and
          investments of the Company (except assets used in the operation of the
          Company's principal office and agencies) including, without
          limitation, the power directly or by delegation to do all such acts
          and things as it may deem necessary and proper to (i) establish the
          Company's financial and investment policy, (ii) invest, reinvest,
          manage, select, sell and otherwise dispose of the Company's assets,
          (iii) designate depositories for the Company's funds and authorize
          persons to make deposits in and withdrawals from such depositories,
          (iv) appoint one or more managers of the Company's regional loan and
          real estate offices, (v) borrow money for the use and benefit of the
          Company in such amount and on such terms as it shall determine, and
          (vi) pledge the Company's assets as security for the payment of such
          loan or other purposes."

                              ******************

          "Section 6.3 Other Instruments. The chairman of the board, the
                       -----------------
          president, the vice presidents, and such other persons as the board,
          the executive committee or the finance committee may designate shall
          each have authority to execute and acknowledge on behalf of the
          Company all instruments executed in the name of the Company; and the
          chairman of the board, the president and the vice presidents shall
          each have authority to execute powers of attorney authorizing other

                                       50
<PAGE>
 
          persons to execute and acknowledge such instruments in specific
          instances. The secretary and any associate or assistant secretary
          shall each have authority to attest, countersign and acknowledge all
          such instruments requiring attestation, countersignature or
          acknowledgment. Insurance policies and annuity contracts issued by the
          Company and endorsements thereto shall be executed in the manner
          provided by the board or executive committee."

     I further certify that the Finance Committee of the Company, by resolution
approved on _________, 1996, which resolution is now in full force and effect,
has authorized the sale of _______________________.

     I further certify that _____________________ is a Vice President and
_______________ is an Assistant Secretary of the Company.

     IN WITNESS WHEREOF, I have hereunto affixed my name as Assistant Secretary,
and caused the corporate seal of the Company to be hereto affixed this __ day of
________________, 19__.


                               ____________________________________
                               Assistant Secretary of
                               The Northwestern Mutual Life
                               Insurance Company

                                       51
<PAGE>
 
STATE OF WISCONSIN     )
                       ) ss.
COUNTY OF MILWAUKEE    )

On __________________, before me, __________________, personally
appeared _____________, Assistant Secretary of THE NORTHWESTERN MUTUAL LIFE
INSURANCE COMPANY. personally known to me (or proved to me on the basis of
satisfactory evidence) to be the person(s) whose name(s) is/are subscribed to
the within instrument and acknowledged to me that he/she/they executed the same
in his/her/their authorized capacity (ies), and that by his/her/their
signature(s) on the instrument the person(s), or the entity upon behalf of which
the person(s) acted, executed the instrument.

WITNESS my hand and official seal.


_________________________________
Notary Public, State of Wisconsin

My commission expires: _______________________

                                       52
<PAGE>
 
                                  EXHIBIT "A"
                               TO CERTIFICATE OF
                            CORPORATE AUTHORIZATION



PARCELS 1 AND 2 OF PARCEL MAP NO.16960, IN THE CITY OF LONG BEACH, COUNTY OF LOS
ANGELES, STATE OF CALIFORNIA, AS PER MAP FILED IN BOOK 208 PAGES 92 THROUGH 100
INCLUSIVE OF PARCEL MAPS, IN THE OFFICE OF THE COUNTY RECORDER OF SAID COUNTY,
TOGETHER WITH IMPROVEMENTS LOCATED THEREON.

EXCEPT THEREFROM ALL OIL, GAS, AND OTHER HYDROCARBONS IN AND UNDER, OR WHICH
MAY BE PRODUCED OR SAVED FROM SAID LAND, TOGETHER WITH ALL RIGHTS OF EVERY KIND
AND DESCRIPTION WHATSOEVER TO DRILL FOR, DEVELOP, TAKE, REMOVE, AND SEVER THE
SAME, OR ANY PART THEREOF, FROM SAID LAND, WITHOUT, HOWEVER, THE RIGHT TO THE
USE OF THE SURFACE OF SAID LAND IN CONNECTION WITH THE DEVELOPMENT OR REMOVAL OF
SAID OIL, GAS OR OTHER HYDROCARBONS, ALL DRILLING AND BORING FOR SAID PURPOSES
TO BE DONE BENEATH THE SURFACE OF SAID LAND AT ANY LEVEL, 100 FEET, OR MORE,
BELOW THE SURFACE THEREOF, THE SURFACE OPENING OF THE WELL HOLE TO BE LOCATED ON
LAND OTHER THAN THE LAND ABOVE DESCRIBED, AS RESERVED IN THE DEED FROM BIXBY
LAND COMPANY, A CORPORATION, RECORDED AUGUST 25, 1948 IN BOOK 28072 PAGE 204,
OFFICIAL RECORDS, AND RECORDED FEBRUARY 10, 1950 IN BOOK 32238 PAGE 67,
OFFICIAL RECORDS, AND RECORDED DECEMBER 28, 1950 IN BOOK 35178 PAGE 303,
OFFICIAL RECORDS, AND RECORDED DECEMBER 28, 1950 IN BOOK 35179 PAGE 310,
OFFICIAL RECORDS.

                                       53
<PAGE>
 
                                   EXHIBIT G

                            QUIT CLAIM BILL OF SALE

     Know all men by these presents, that THE NORTHWESTERN MUTUAL LIFE INSURANCE
COMPANY, a Wisconsin corporation, with its principal office located at 720 East
Wisconsin Avenue, Milwaukee, Wisconsin 53202 ("Seller"), in consideration of the
sum of Ten and no/100 Dollars ($10.00) and other good and valuable
consideration, to it in hand paid by KILROY INDUSTRIES ("Buyer") the receipt and
sufficiency of which is hereby acknowledged, quit claims to Buyer its interests
in the personal property described on Exhibit 2 attached hereto which is located
on, or is used or intended for use in connection with the land described on
Exhibit I attached hereto or the improvements located on such land.

     SELLER MAKES NO WARRANTIES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
WARRANTIES OF CONDITION, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

        IN WITNESS WHEREOF, Seller has executed this instrument as of 
__________________________, 199__.

                                      THE NORTHWESTERN MUTUAL LIFE 
                                       INSURANCE COMPANY

(CORPORATE SEAL)
                                      By:
                                         -----------------------------
                                           Its Vice President

                                      Attest: 
                                             -------------------------
                                           Its Vice President

                                       54
<PAGE>
 
                                   EXHIBIT I
                                       TO
                            QUIT CLAIM BILL OF SALE


                               Legal Description



PARCELS 1 AND 2 OF PARCEL MAP NO.16960, IN THE CITY OF LONG BEACH, COUNTY OF LOS
ANGELES, STATE OF CALIFORNIA, AS PER MAP FILED IN BOOK 208 PAGES 92 THROUGH 100
INCLUSIVE OF PARCEL MAPS, IN THE OFFICE OF THE COUNTY RECORDER OF SAID COUNTY,
TOGETHER WITH IMPROVEMENTS LOCATED THEREON.

EXCEPT THEREFROM ALL OIL, GAS, AND OTHER HYDROCARBONS IN AND UNDER, OR WHICH MAY
BE PRODUCED OR SAVED FROM SAID LAND, TOGETHER WITH ALL RIGHTS OF EVERY KIND AND
DESCRIPTION WHATSOEVER To DRILL FOR, DEVELOP, TAKE, REMOVE, AND SEVER THE SAME,
OR ANY PART THEREOF, FROM SAID LAND, WITHOUT, HOWEVER, THE RIGHT TO THE USE OF
THE SURFACE OF SAID LAND IN CONNECTION WITH THE DEVELOPMENT OR REMOVAL OF SAID
OIL, GAS OR OTHER HYDROCARBONS, ALL DRILLING AND BORING FOR SAID PURPOSES TO BE
DONE BENEATH THE SURFACE OF SAID LAND AT ANY LEVEL, 100 FEET, OR MORE, BELOW THE
SURFACE THEREOF, THE SURFACE OPENING OF THE WELL HOLE TO BE LOCATED ON LAND
OTHER THAN THE LAND ABOVE DESCRIBED, AS RESERVED IN THE DEED FROM BIXBY LAND
COMPANY, A CORPORATION, RECORDED AUGUST 25, 1948 IN BOOK 28072 PAGE 204,
OFFICIAL RECORDS, AND RECORDED FEBRUARY 10, 1950 IN BOOK 32238 PAGE 67, OFFICIAL
RECORDS, AND RECORDED DECEMBER 28, 1950 IN BOOK 35178 PAGE 303, OFFICIAL
RECORDS, AND RECORDED DECEMBER 28, 1950 IN BOOK 35179 PAGE 310, OFFICIAL
RECORDS.

                                       55
<PAGE>
 
                        KILROY AIRPORT CENTER LONG BEACH
                                   SRE 331269

                               PERSONAL PROPERTY


 
Exterior Furnishings
- --------------------

Item                          Quantity
- ----                          --------
Concrete Ash/Trash Urns            8
Concrete Planters                 27
Metal Benches                      7
"Mini" Concrete Ash Urns           1
 
Interior Furnishings
- --------------------

Item                          Quantity
- ----                          --------
Teak Benches                       4
Teak Planters                     22

Steelcase Partitions
- --------------------
     (see next page)


                                  EXHIBIT "2"

                                    Page 1
<PAGE>
 
                      DESCRIPTION OF STEELCASE PARTITIONS

================================================================================
                 SIZE                                  QTY./1/
================================================================================
                                  65" Panels
- --------------------------------------------------------------------------------
        65"x20"                                                164ea
- --------------------------------------------------------------------------------
        65"x25"                                                116ea
- --------------------------------------------------------------------------------
        65"x30"                                                232ea
- --------------------------------------------------------------------------------
        65"x36"                                                711ea
- --------------------------------------------------------------------------------
        65"x42"                                                553ea
- --------------------------------------------------------------------------------
        65"x45"                                                191ea
- --------------------------------------------------------------------------------
        65"x60"                                                815ea
================================================================================
                                42" Low Panels
- --------------------------------------------------------------------------------
        42"x20"                                                 30ea
- --------------------------------------------------------------------------------
        42"x25"                                                  8ea
- --------------------------------------------------------------------------------
        42"x30"                                                252ea
- --------------------------------------------------------------------------------
        42"x36"                                                158ea
- --------------------------------------------------------------------------------
        42"x42"                                                 52ea
- --------------------------------------------------------------------------------
        42"x45"                                                206ea
- --------------------------------------------------------------------------------
        42"x60"                                                155ea
================================================================================
                             75" Extra High Panels
- --------------------------------------------------------------------------------
        75"x20"                                                 13ea
- -------------------------------------------------------------------------------
        75"x25"                                                  3ea
- --------------------------------------------------------------------------------
        75"x30"                                                  7ea
- -------------------------------------------------------------------------------
        75"x35"                                                  5ea
- -------------------------------------------------------------------------------
        75"x36"                                                  3ea
- -------------------------------------------------------------------------------
        75"x42"                                                  7ea
- -------------------------------------------------------------------------------
        75"x45"                                                 24ea
===============================================================================

/1/Seller does not warrant or represent the number of panels and Buyer shall
   accept the same "as is," "where is" and irrespective of the actual number of
   panels now existing.

                                  EXHIBIT "2"

                                    Page 2
<PAGE>
 
                                   EXHIBIT H


            SELLER'S CERTIFICATE OF REAFFIRMATION OF REPRESENTATIONS


            KNOW ALL MEN BY THESE PRESENTS that pursuant to Section 6.8 of the
Real Estate Purchase Agreement dated ___________________________, by and between
The Northwestern Mutual Life Insurance Company, as Seller, and Kilroy
Industries, as Buyer (the "Agreement"), Seller hereby certifies and confirms to
Buyer, that all of the representations and warranties of Seller contained in the
Agreement are true and correct in all material respects on and as of the date
hereof with the same effect as though such representations and warranties had
been made on and as of such date. As provided in Section 6.8 of the Agreement,
this certification and all of the representations and warranties made by Seller
in the Agreement shall automatically expire, terminate and be of no further
force and effect as of ____________________________.


            IN WITNESS WHEREOF the undersigned has executed this Certificate
this _____ day of ______________, 1996.


                                       THE NORTHWESTERN MUTUAL LIFE 
                                       INSURANCE COMPANY


                                       By:
                                          -------------------------------
                                       Name:
                                       Its:  Vice President


                                       Attest:
                                              ---------------------------
                                       Name:
                                       Its:  Assistant Secretary



                                      57
<PAGE>
 
                                   EXHIBIT I

             BUYERS CERTIFICATE OF REAFFIRMATION OF REPRESENTATIONS


                    KNOW ALL MEN BY THESE PRESENTS that pursuant to Section ___
of the Real Estate Purchase Agreement dated __________________, by and between
The Northwestern Mutual Life Insurance Company, as Seller, and Kilroy
Industries, as Buyer (the "Agreement"), Buyer hereby certifies and confirms to
Seller, that all of the representations and warranties of Buyer contained in the
Agreement are true and correct in all material respects on and as of the date
hereof with the same effect as though such representations and warranties had
been made on and as of such date.

                IN WITNESS WHEREOF the undersigned has executed this Certificate
this ______ day of ____________, 1996.

                                       ----------------------------------

                                       By:
                                          -------------------------------
                                       Name: 
                                            -----------------------------
                                       Title: 
                                             ----------------------------


                                       By:
                                          -------------------------------
                                       Name: 
                                            -----------------------------
                                       Title: 
                                             ----------------------------



                                      58
<PAGE>
 
                                   EXHIBIT J

          Assignment and Assumption of Contracts and Other Obligations


     BY THIS AGREEMENT, made this ___ day of _____________________, 1996 
The Northwestern Mutual Life Insurance Company, a Wisconsin corporation,
("Assignor"), and Kilroy Industries, a _____________ ("Assignee"), confirm 
and agree as follows:

                                       I.
                                    RECITALS

     1.1  Assignor has agreed to sell its interest in the "Property" to Assignee
on or before ___________, 1996. As used herein, the term "Property" means
certain property commonly known as 3880 and 3900 Kilroy Airport Way, Long Beach,
CA 90806 (the "Property"), which is more particularly described on Exhibit "A"
hereto.

     1.2  Assignor desires to assign to Assignee and Assignee desires to acquire
the Assignor's interest in all service and maintenance contracts, licenses, real
estate tax refunds and equipment leases affecting the Property, except for
insurance policies and that certain Management Agreement entered into between
Buyer, as Operator and Seller, as Owner on July 21, 1993, (the "Contracts")
effective upon the closing of the sale described in 1.1 above (the "Closing").

                                      II.
                                   AGREEMENT

     2.1   In consideration of the sum of Ten Dollars ($10.00) paid by Assignee,
the receipt of which is hereby acknowledged, the Assignor hereby assigns to
Assignee, all of its right, title, and interest in and for Contracts, subject to
the terms, covenants, provisions, and conditions set forth therein.

     2.2  In order to induce Assignor to execute and deliver this instrument and
to assign the interest hereby conveyed, Assignee covenants with the Assignor as
follows:

          a)  To promptly pay or cause to be paid to the person or persons,
     corporations, who from time to time may be entitled thereto,



                                       59
<PAGE>
 
     all amounts of any nature provided by the terms of such Contracts, to be
     paid by the owner of the Property;

          b)  To assume, keep, observe, and perform duly and punctually, all of
     the terms, covenants, provisions, and conditions contained in such
     Contracts on the part of the landlord to be kept, observed, and performed
     in the same manner and with the same effect as though Assignee were the
     original and named party to such Contracts;

          c)  To indemnify Assignor against any claims arising under such
     Contracts.

     IN WITNESS WHEREOF, Assignor and Assignee by their proper officers
thereunder duly authorized, have executed these presents as of the day and year
first hereinabove written.

          Assignor:               THE NORTHWESTERN MUTUAL LIFE 
                                   INSURANCE COMPANY

                                  By: 
                                     ------------------------------------
                                  Its:  Vice President
                                  Attest: 
                                         --------------------------------

                                  Its:  Assistant Secretary

          Assignee:               KILROY INDUSTRIES 

                                  By:
                                     ------------------------------------

                                  Its:  
                                      -----------------------------------

                                  Attest: 
                                         --------------------------------
                                  Its:
                                      -----------------------------------



                                      60
<PAGE>
 
                                   EXHIBIT K

                     Access and Indemnification Agreement


     This ACCESS AND INDEMNIFICATION AGREEMENT (the "Agreement") is entered into
as of the __ day of __________, 1996, by and between THE NORTHWESTERN MUTUAL
LIFE INSURANCE COMPANY, a Wisconsin corporation, ("NML"}, and KILROY INDUSTRIES,
INC., ("Kilroy").

     WHEREAS, NML is the owner of a leasehold interest in land described on
Exhibit A attached hereto, created by a ground lease between Kilroy Long Beach
Associates and the City of Long Beach dated January 24, 1989;

     WHEREAS, the Property contains one or more underground storage tanks and
was the former site of a gasoline station and aircraft painting operation;

     WHEREAS, Kilroy has retained ________________________ ("_____")to
perform various tests and/or inspections of the Property, including but not
limited to examining the terrain, physical and environmental conditions of the
Property and, ______________________________________; and

     WHEREAS, NML, has agreed to allow such work on the Property under the terms
of this Agreement.

     NOW THEREFORE, for good and valuable consideration the receipt and
sufficiency of which are hereby acknowledged, NML and Kilroy agree as follows:

     1.  NML hereby grants to Kilroy a revocable license to permit _____ to
enter the Property and perform the following work on the Property in accordance
with this Agreement:

          a.  
              ----------------------------------
              ----------------------------------


          b.  
              ----------------------------------

                                      61
<PAGE>
 
              ------------------------------------

          c.  
              ------------------------------------
              ------------------------------------

          d.  
              ------------------------------------
              ------------------------------------

Any work in addition to the specific activities described above will require the
written consent of NML.

     2.  Kilroy hereby agrees that neither it, nor its contractors or agents,
will enter onto the Property without two (2) days prior written notice to NML at
the following address:

                    The Northwestern Mutual Life Insurance Company
                    AT&T Building, Suite 2100
                    611 West Sixth Street
                    Los Angeles, California 90017
                    Attn:  Robert Ralls

     3.   Kilroy hereby agrees that its agents or contractors will observe all
appropriate safety precautions in conducting any inspections of the Property. At
the sole discretion of NML, Kilroy's agents and contractors may be required to
observe safety precautions which exceed any limits as required by law.

     4.   Kilroy hereby agrees that it shall provide NML with satisfactory
certificates of insurance evidencing that Kilroy's agents or contractors have
insurance in full force and effect meeting the requirements set forth below.
Nothing herein contained shall in any way limit Kilroy's liability under this
Agreement or otherwise.

           Type                                Limits
           ----                                ------

     Worker's Compensation and                 $ Statutory
      Employer's Liability

     General Liability                   $1,000,000/occurrence

     $1,000,000/aggregate



                                      62
<PAGE>
 
     Automobile Liability                $1,000,000/person
                                         $1,000,000/occurrence

     Professional Liability              
     $1,000,000/occurrence
                                         $1,000,000/aggregate

     Pollution Liability                 $1,000,000/occurrence
                                         $1,000,000/aggregate

Kilroy will guarantee that its agents and contractors maintain the aforesaid
coverages throughout the term of this Agreement and for a minimum period of
three (3) years following the termination of this Agreement.

     5.   Kilroy hereby agrees that the rights granted herein shall be subject
to the rights of any tenants occupying the Property, including without
limitation, rights of quiet enjoyment, and Kilroy agrees that Kilroy, and its
agents and contractors, will not interfere with any tenants, contractors, or
invitees on the Property.

     6.   Kilroy hereby agrees that Kilroy, and its agents and contractors, will
hold in strict confidence any information obtained regarding the Property, and
agrees to provide NML with copies of any reports generated in connection with
the rights granted herein provided that Kilroy may disclose the information
permitted to be disclosed by 6.1(a) of the Real Estate Purchase Agreement
entered into by NML and Kilroy, as Seller and Buyer respectively on
________________, 1996.

     7.   Kilroy hereby acknowledges and agrees that it is only authorized to
install and operate ___________ monitoring wells at the locations described in
Exhibit B attached hereto and incorporated herein, and that such installation
shall be completed with a flush mounted and locked design. Kilroy further agrees
to properly abandon all wells and other disturbances and restore, to the
reasonable satisfaction of NML, the Property to its condition prior the conduct
of any Work by or on behalf of Kilroy

     8.   Kilroy hereby agrees to indemnify, defend and hold NML and its
employees, tenants, invitees, contractors and agents (the "Indemnified Parties")
harmless from and against any losses, damages, expenses, liabilities, claims,
demands and causes of action (together with any legal fees and other expense
incurred by the Indemnified Parties in connection therewith), resulting directly
or indirectly from, or in connection with, (i)



                                      63
<PAGE>
 
contamination of the Property by Kilroy or its agents or contractors, or 
(ii) any entry on the Property (whether or not permitted by this Agreement) 
by Kilroy or its agents, contractors or other representatives, including, 
without limitation, any losses, damages, expenses, liabilities, claims, 
demands and causes of action resulting, or alleged to be resulting, from 
injury or death of persons, or damage to the Property or any other property, 
or mechanic's or materialmen's liens.

     9.  The rights granted Kilroy hereunder shall terminate on July ___, 1996.
The indemnifications contained in section 8 hereof shall survive such
termination. Any extension of the aforesaid rights shall require written
approval of NML. Such approval will not be unreasonably withheld by NML.

     10.  No action or proceeding brought or instituted under this Agreement and
no recovery made as a result thereon shall be a bar or defense to any further
action or proceeding under this Agreement.

     11.  In the event that any lien is placed upon all or any portion of the
Property as a result of the work being performed hereunder, Kilroy shall pay or
bond and discharge such lien within five (5) days after notice of such lien.

     12.  Neither NML's granting of nor Kilroy's exercise of the rights given
hereunder shall be deemed to be a right to remediate or a remediation of an
environmental problem on the Property.

     13.  This Agreement and the provisions herein shall be interpreted,
construed, and enforced in accordance with the laws of the State of California.

     14.  Nothing in this agreement shall prevent NML from transferring this
agreement to any subsequent owner of the Property. Any subsequent owner of the
Property shall have all the same rights and privileges afforded NML in this
agreement.



                                      64
<PAGE>
 
     IN WITNESS WHEREOF, the parties have executed this Agreement on the date
first above written.

                                              THE NORTHWESTERN MUTUAL
                                              LIFE INSURANCE COMPANY
            
                                              By:
                                                 ----------------------------
            
                                              Title: 
                                                    -------------------------
            
            
                                              KILROY INDUSTRIES
            
                                              By:
                                                 ----------------------------
            
                                              Title: 
                                                    -------------------------



                                       65
<PAGE>
 
                                   EXHIBIT A

                               LEGAL DESCRIPTION



PARCELS 1 AND 2 OF PARCEL MAP NO. 16960, IN THE CITY OF LONG BEACH, COUNTY OF
LOS ANGELES, STATE OF CALIFORNIA, AS PER MAP FILED IN BOOK 208 PAGES 92 THROUGH
100 INCLUSIVE OF PARCEL MAPS, IN THE OFFICE OF THE COUNTY RECORDER OF SAID
COUNTY, TOGETHER WITH IMPROVEMENTS LOCATED THEREON.

EXCEPT THEREFROM ALL OIL, GAS, AND OTHER HYDROCARBONS IN AND UNDER, OR WHICH MAY
BE PRODUCED OR SAVED FROM SAID LAND, TOGETHER WITH ALL RIGHTS OF EVERY KIND AND
DESCRIPTION WHATSOEVER TO DRILL FOR, DEVELOP, TAKE, REMOVE, AND SEVER THE SAME,
OR ANY PART THEREOF, FROM SAID LAND, WITHOUT, HOWEVER, THE RIGHT TO THE USE OF
THE SURFACE OF SAID LAND IN CONNECTION WITH THE DEVELOPMENT OR REMOVAL OF SAID
OIL, GAS OR OTHER HYDROCARBONS, ALL DRILLING AND BORING FOR SAID PURPOSES TO BE
DONE BENEATH THE SURFACE OF SAID LAND AT ANY LEVEL, 100 FEET, OR MORE, BELOW THE
SURFACE THEREOF, THE SURFACE OPENING OF THE WELL HOLE TO BE LOCATED ON LAND
OTHER THAN THE LAND ABOVE DESCRIBED, AS RESERVED IN THE DEED FROM BIXBY LAND
COMPANY, A CORPORATION, RECORDED AUGUST 25, 1948 IN BOOK 28072 PAGE 204,
OFFICIAL RECORDS, AND RECORDED FEBRUARY 10, 1950 IN BOOK 32238 PAGE 67, OFFICIAL
RECORDS, AND RECORDED DECEMBER 28,1950 IN BOOK 35178 PAGE 303, OFFICIAL RECORDS,
AND RECORDED DECEMBER 28, 1950 IN BOOK 35179 PAGE 310, OFFICIAL RECORDS.



                                      66
<PAGE>
 
                                   EXHIBIT B

                          LOCATION OF MONITORING WELLS



46859/22



                                       67

<PAGE>
 
                                                                   EXHIBIT 10.10

                         LONG BEACH MUNICIPAL AIRPORT

                                LEASE AGREEMENT



                         KILROY LONG BEACH ASSOCIATES

                       a California Limited Partnership

                                  "DEVELOPER"



                              CITY OF LONG BEACH

                                  "LANDLORD"
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
<TABLE> 
<CAPTION>
                                                                        Page
                                                                        ----
<S> <C>                                                                 <C> 
1.  SUBJECT OF LEASE                                                       1
      1.1  Purpose of Lease..............................................  1
      1.2  Lease of Premises.............................................  1
      1.3  The Project Area..............................................  1
      1.4  The Premises..................................................  2
              1.4.1  Adjacent Properties.................................  2
      1.5  Parties to the Lease Agreement................................  3
              1.5.1  Landlord............................................  3
              1.5.2  Developer...........................................  3
              1.5.3  Association by Developer............................  4

2.  TERM.................................................................  4
      2.1  Basic Term ...................................................  4
      2.2  Options for Extensions .......................................  4

3.  RENT.................................................................  5
      3.1  Minimum Ground Rent ..........................................  5
              3.1.1  Amount of Ground Rent ..............................  5
              3.1.2  Allocation of Ground Rent...........................  5
              3.1.3  Payment of Ground Rent .............................  6
              3.1.4  Initial Ground Rent.................................  7
              3.1.5  Change in Scope of Development......................  8
              3.1.6  Delays in Commencement of Ground Rent ..............  9
              3.1.7  Due Dates and Place of Payment......................  9
      3.2  Ground Rent Adjustments ...................................... 10
              3.2.1  Adjustment Dates.................................... 10
              3.2.2  Ground Rent Adjustments by Appraisal................ 10
                     3.2.2.1 Adjustments for Predevelopment
                       and Infrastructure Costs.......................... 11
              3.2.3  Appraisal .......................................... 11
              3.2.4  Maximum Rent Increase .............................. 13
                     3.2.4.1 Allocation to Parcels....................... 13
                     3.2.4.2 Base Sublease Rental........................ 14
                     3.2.4.3 Sublease Rental Percentage Change........... 14
                     3.2.4.4 Adjusted Ground Rent........................ 14
                     3.2.4.5 Sale or Assignment of Leasehold Interest.... 15
      3.3  Ground Rent Adjustments Following Reconstruction.............. 15
              3.3.1  Ground Rent Adjustments............................. 16
                     3.3.1.1 Adjustment Date ............................ 16
                     3.3.1.2 Alternate Adjustment Date................... 16
              3.3.2  No Adjustment At Next Scheduled Adjustment Date..... 17
</TABLE>
                                       i
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                  (continued)
                                                        
                                                        
<TABLE>
<CAPTION>                           
                                                                     Page  
                                                                     ----   
<S>   <C>                                                            <C>
                3.3.3  Maximum Ground Rent Adjustment...............  17
      3.4   Adjustments to Ground Rent During Option Term...........  17
      3.5   Maximum Ground Rent Increase ...........................  17
      3.6   Definition of Predevelopment and
              Infrastructure Costs..................................  18
      3.7   Approval of Improvement Plans...........................  18
      3.8   Determination of Predevelopment and
              Infrastructure Costs..................................  19
      3.9   Construction by Landlord................................  20
      3.10  Phasing of Improvements.................................  21
      3.11  Exceptions to Maximum Predevelopment and
              Infrastructure Costs..................................  21
                3.11.1 Rights-of-Way................................  21
                3.11.2 Sewer and Storm Drain........................  22
                3.11.3 Traffic Mitigation...........................  22

4. LEASEHOLD MORTGAGES..............................................  22
      4.1   Leasehold Mortgage Authorized...........................  22
      4.2   Notice to Landlord......................................  23
                4.2.1  Leasehold Mortgage Requirements..............  23
                4.2.2  Assignment of Leasehold Mortgage.............  23
                4.2.3  Landlord's Acknowledgement of Notice.........  23
                4.2.4  Developer to Provide Copies..................  24
      4.3   Definitions.............................................  25
                4.3.1  Institutional Lender.........................  25
                4.3.2  Leasehold Mortgage...........................  25
                4.3.3  Leasehold Mortgagee..........................  25
      4.4   Consent of Leasehold Mortgagee Required.................  25
      4.5   Default Notice..........................................  26
      4.6   Notice to Leasehold Mortgagee...........................  26
                4.6.1  Landlord's Termination Notice................  26
                4.6.2  Proper Address of Leasehold Mortgagee........  28
      4.7   Procedure on Default....................................  28
                4.7.1  Extension of Termination Notice Period ......  28
                      4.7.1.1  Payment of Monetary Obligations......  29
                      4.7.1.2  Foreclosure of Leasehold Mortgage....  29
                4.7.2  Cure of Default .............................  29
                4.7.3  Compliance of Leasehold Mortgagee............  30
                4.7.4  Leasehold Mortgage Not an Assignment.........  30
</TABLE>
                                      ii
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                  (continued)
                                                        
<TABLE>
<CAPTION>                                                                   Page
                                                                            ----
<S> <C>                                                                     <C>
                4.7.5  Obligation of Leasehold Mortgagee
                        to Repair or Reconstruct........................... 31
                4.7.6  Leasehold Mortgagee's Right to Transfer............. 32
                4.7.7  Leasehold Mortgagee Transfer a Permitted Sale....... 32
      4.8   New Lease...................................................... 33
                4.8.1 Terms of New Lease................................... 33
                      4.8.1.1 Written Request to Landlord.................. 33
                      4.8.1.2 Payment of Obligations....................... 33
                      4.8.1.3 Remedy of Developer's Defaults............... 34
                      4.8.1.4 New Lease to Have First Priority............. 35
                      4.8.1.5 Developer's Obligations Under New Lease...... 35
      4.9   New Lease Priorities........................................... 35
      4.10  Eminent Domain................................................. 36
      4.11  Notice of Arbitration.......................................... 36
      4.12  Amendment to Facilitate Leasehold Financing.................... 36
      4.13  Security Deposit............................................... 36
      4.14  Estoppel Certificate........................................... 37
      4.15  Notices........................................................ 38
      4.16  Erroneous Payments............................................. 38
      4.17  Request for Notice for Benefit of Landlord..................... 38
      4.18  Release or Forebearance........................................ 39
      4.19  Notice......................................................... 39
      4.20  No Merger...................................................... 39
      4.21  No Payment by Landlord......................................... 39
      4.22  Self Liquidating Mortgage...................................... 40
      4.23  Leasehold Mortgagee Need Not Cure Specified Defaults........... 40
      4.24  Casualty Loss.................................................. 40

5.  ASSIGNMENT AND SUBLETTING.............................................. 40
      5.1   Prohibition Against Change in Ownership, Management and
                 Control................................................... 40
                5.1.1  Name and Address for Notices........................ 41
                5.1.2  Type of Entity...................................... 41
                5.1.3  Other Transfers .................................... 41
                5.1.4  Buildings or Land................................... 42
      5.2  Assignments Not Subject to Approval............................. 42
                5.2.1  Death or Incapacity................................. 42
                5.2.2  Family Transfer..................................... 42
                5.2.3  Affiliated Corporation.............................. 42
                5.2.4  IRS Transfer ....................................... 43
                5.2.5  Public Entity....................................... 43
                5.2.6  Partner............................................. 43
</TABLE>
                                      iii
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                  (continued)
<TABLE>
<CAPTION>
                                                                          Page
                                                                          ----
<S> <C>                                                                   <C>
                5.2.7  Comprising Entity..................................  44
      5.3 Assignment Invalid..............................................  44
      5.4 Approval of Assignments ........................................  44
                5.4.1  Name...............................................  44
                5.4.2  Description........................................  44
                5.4.3  Nature of Business.................................  44
                5.4.4  Financial Information..............................  45
                5.4.5  Officers ..........................................  45
                5.4.6  Additional Information.............................  45
                5.4.7  Informational Purposes.............................  45
                5.4.8  Confidentiality....................................  46
                5.4.9  Disapproval by Landlord............................  46
      5.5  No Release.....................................................  47
      5.6  Unauthorized Change ...........................................  47
      5.7  Subletting.....................................................  48
                5.7.1  Minor Subleases....................................  50
                5.7.2  Consent to Sublease................................  50
                      5.7.2.1 Description.................................  50
                      5.7.2.2 Name........................................  51
                      5.7.2.3 Nature of Business..........................  51
                      5.7.2.4 Financial Information.......................  51
                      5.7.2.5 Officers ...................................  51
                      5.7.2.6 Additional Information......................  51
                      5.7.2.7 Informational Purposes......................  52
                5.7.3 Confidentiality.....................................  52
                5.7.4 Disapproval by Landlord.............................  52
      5.8  Sale of Buildings..............................................  53

6.  INDEMNITY, INSURANCE, CASUALTY DAMAGE ................................  53
      6.1  Indemnification and Hold Harmless..............................  53
      6.2  Insurance......................................................  54
                6.2.1  Liability Insurance................................  54
                6.2.2  Fire and Extended Coverage.........................  56
                6.2.3  Aviation Facilities................................  58
                6.2.4  Miscellaneous......................................  59
                6.2.5  Blanket policies...................................  60
                6.2.6  Self-Insurance.....................................  61
                6.2.7  Insurance Adjustments..............................  61
      6.3  Damage or Destruction..........................................  61
                6.3.1  Restoration of Premises............................  61
                6.3.2  Right to Terminate.................................  62
                6.3.3  No Reduction in Rent...............................  63

7.  DEVELOPMENT OF THE PROJECT............................................  63
      7.1  Scope of Development...........................................  63
      7.2  Developer's Obligation to Develop Premises.....................  64
                7.2.1  Best Efforts to Sublease ..........................  65
</TABLE>
                                      iv
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                  (continued)
<TABLE>
<CAPTION>
                                                                           Page
                                                                           ----
<S>   <C>                                                                  <C>
      7.3  Architectural Approval .........................................  65
                7.3.1  Restriction ........................................  65
                7.3.2  Basic Concept Documents.............................  66
                7.3.3  Landscaping.........................................  66
                7.3.4  Exterior Elevations.................................  67
                7.3.5  Security and Security Plans.........................  67
                7.3.6  Amendments..........................................  68
                7.3.7  Landlord Approval ..................................  68
                7.3.8  Communication and Consultation......................  70
                7.3.9  Requirements of Institutional
                       Lender or Major Occupant............................  70
                7.3.10 Interior Improvements...............................  71
                7.3.11 Modification of Plans...............................  71
      7.4  Performance and Payment Bonds...................................  72
                7.4.1  Agreement to Provide................................  72
                7.4.2  Term of the Bond....................................  73
                7.4.3  Penal Sum...........................................  73
                7.4.4  Alternative Performance.............................  73
      7.5  Construction....................................................  74
                7.5.1  Costs of Construction...............................  74
                7.5.2  Right to Improve....................................  74
                7.5.3  Governmental Permits................................  75
                7.5.4  Rights of Access....................................  76
                7.5.5  Local, State and Federal Laws.......................  76
                7.5.6  Antidiscrimination During Construction .............  77
                7.5.7  Responsibilities of Landlord........................  77
                      7.5.7.1 Governmental Approvals.......................  77
                      7.5.7.2 Easements....................................  77
                      7.5.7.3 Off-Site Improvements........................  78
                      7.5.7.4 Bond Financing ..............................  78
                7.5.8  Responsibilities of Developer.......................  79
                7.5.9  Maintenance.........................................  79
                7.5.10 Acceptance of Premises..............................  80
      7.6  Subdivided Leases...............................................  80
                7.6.1  Same Parties........................................  81
                7.6.2  Obligations of Subdivided Leases....................  81
                7.6.3  Terms, Covenants....................................  81
                      7.6.3.1 Ground Rent..................................  82
                      7.6.3.2 Improvements ................................  82
                      7.6.3.3 Easements and CC & R's.......................  82
                      7.6.3.4 Description of Property......................  83
                      7.6.3.5 Excluded Matters.............................  83
      7.7  Combining Leases................................................  83
                7.7.1  Ground Rent.........................................  83
                7.7.2  Easements and CC & R's..............................  84
</TABLE>
                                       v
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                  (continued)
<TABLE>
<CAPTION>
                                                                         Page
                                                                         ----
<S> <C>                                                                  <C>
8.  USE.................................................................  84
      8.1  Permitted Development........................................  84
      8.2  Aviation Related Uses........................................  84
      8.3  Access Taxiway...............................................  85
      8.4  Vehicle Parking .............................................  85
      8.5  Federal Aviation Administration..............................  85
      8.6  Inspection...................................................  86

9.  LIENS...............................................................  86
      9.1  Developer's Responsibility...................................  86
      9.2  Notice of Work ..............................................  86
      9.3  Discharge of Liens ..........................................  87
      9.4  Landlord's Right to Pay .....................................  87
      9.5  Reimbursement of Landlord....................................  88

10.  CONDEMNATION.......................................................  88
      10.1  Definition of Terms ........................................  88
                10.1.1  Total Taking ...................................  88
                10.1.2  Partial Taking .................................  88
                10.1.3  Voluntary Conveyance ...........................  89
                10.1.4  Date of Taking .................................  89
                10.1.5  Leased Land ....................................  89
      10.2  Effect of Taking ...........................................  89
      10.3  Allocation of Award.........................................  90
      10.4  Reduction of Ground Rent on Partial Taking..................  90
      10.5  Temporary Taking ...........................................  91

11.  ALTERATIONS BY DEVELOPER...........................................  91

12.  TAXES AND ASSESSMENTS..............................................  92
      12.1  Payment by Developer........................................  92
      12.2  Installment Payments........................................  92
      12.3  Proration...................................................  93
      12.4  Right to Contest............................................  93

13.  CERTIFICATES BY DEVELOPER AND LANDLORD.............................  94
      13.1  Developer to Provide........................................  94
      13.2  Landlord to Provide.........................................  95

14.  QUIET ENJOYMENT....................................................  95

15.  TERMINATION AND FURTHER LEASING....................................  96
      15.1  Termination ................................................  96
      15.2  Termination by Developer....................................  96
      15.3  Termination by Landlord.....................................  96
</TABLE>
                                      vi
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                  (continued)
<TABLE>
<CAPTION>
                                                                         Page
                                                                         ----
<S> <C>                                                                  <C>
16. BONDS AND SECURITY DEPOSITS.........................................   97
      16.1  Good Faith Deposit .........................................   97
                16.1.1  Receipt by Landlord.............................   97
                16.1.2  Form of Deposit ................................   97
                16.1.3  Interest........................................   98
                16.1.4  If Bond is Posted...............................   98
      16.2  Construction Security Deposits..............................   98
                16.2.1  Form of Construction Deposit....................   99
                16.2.2  Interest........................................  100
                16.2.3  Incorporation by Reference......................  100
                16.2.4  Return of Deposit...............................  100
                16.2.5  Retention of Deposit by Landlord................  101

17.  GENERAL PROVISIONS.................................................  101
      17.1  Notices, Demands and Communication between the Parties......  101
      17.2  Conflict of Interest .......................................  102
      17.3  Enforced Delay: Extension of Time of Performance............  103
      17.4  Inspection of Books and Records.............................  103
      17.5  Defaults and Remedies.......................................  104
                17.5.1  Defaults - General..............................  104
                17.5.2  Institution of Legal Actions....................  104
                17.5.3  Applicable Law .................................  105
                17.5.4  Service of Process..............................  105
                17.5.5  Rights and Remedies Are Cumulative..............  105
                17.5.6  Inaction Not a Waiver of Default................  105
                17.5.7  Remedies .......................................  106
                17.5.8  Developer's Rights..............................  107
                17.5.9  Lease Termination...............................  107
                17.5.10 Landlord's Exercise of Remedies.................  107
                17.5.11 Payment to Developer ...........................  108
                      17.5.11.1 Reimbursement to Landlord...............  109
                      17.5.11.2 Reimbursement to Developer..............  110
                      17.5.11.3 Ground Rent ............................  110
                      17.5.11.4 Remaining Balance.......................  110
                17.5.12 Delivery of Plans...............................  111
      17.6  Right to Contest Laws.......................................  111
      17.7  Trade Fixtures..............................................  111
      17.8  Continued Possession of Developer...........................  112
      17.9  Utilities...................................................  112
      17.10 Surrender...................................................  113
      17.11 Partial Invalidity..........................................  113
      17.12 Section Headings............................................  114
      17.13 Short Form Lease............................................  114
</TABLE>
                                      vii
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                  (continued)
<TABLE>
<CAPTION>
                                                                         Page
                                                                         ----
<S>  <C>                                                                 <C>
      17.14  Exhibits Incorporated...................................... 114
      17.15  Entire Agreement, Waivers and Amendments................... 114
      17.16  Waivers.................................................... 114
      17.17  Approvals.................................................. 115
      17.18  Successors in Interest..................................... 115
      17.19  "And/Or"................................................... 115
      17.20  "Including" Defined........................................ 115
      17.21  Right of First Refusal to Purchase......................... 115
      17.22  If Developer is a Trustee.................................. 116
      17.23  Limitation of Liability of Partners........................ 117
      17.24  Approvals.................................................. 118
</TABLE>
                                     viii
<PAGE>
 
                                LIST OF EXHIBITS
                                ----------------
<TABLE>
<CAPTION>
                                                         First Appearing at  
Ltr.          Description                               Paragraph       Page
- ----          -----------                               ---------       ----
<S>           <C>                                       <C>             <C>
A             Legal Description of Premises             1.2             1  
                                                                               
B             Site Map of Project Area and              1.4             2  
                Adjacent Properties                                            
                                                                               
C             Parcel Map                                3.1.2           6  
                                                                               
D             Categories of Predevelopment              3.6             18   
                and Infrastructure Costs

E             Form of Nondisturbance                    5.7             49
                Agreement

F             Off-Site Improvements                     7.3             78

G             Landscaping Plans                         7.3.3           67

H             Exterior Elevations                       7.3.4           67

I             Form of Performance Bond and              7.4.1           72
                Labor and Material Bond

J             Construction Schedule                     7.2             64

K             Master FBO Lease                          8.2             84

L             FAA Conditions                            8.5             85

M             Form of Short Form Lease                  17.13           114
</TABLE>
                                      ix
<PAGE>
 
                                 DEFINED WORDS
                                 -------------
<TABLE>
<CAPTION>
Defined Word                                      Paragraph          Page
- ------------                                      ---------          ----
<S>                                               <C>                <C> 
"Adjacent Properties"                             1.4.1              2

"Adjusted Fair Market Land Value"                 3.2.2              11

"Adjusted Ground Rent"                            3.2.4.4            14

"adjustment dates"                                3.2.1              10

"Affiliated Corporation"                          5.2.3              43

"Agreement Establishing Developer"                1.5.2              3

"and/or"                                          17.19              115

"Approved Plans"                                  3.8                19

"as-is"                                           7.5.10             79

"Basic Concept Documents"                         7.3.2              66

"Commencement of Construction"                    3.1.3              6

"Completion Date"                                 5.5                47

"date of taking"                                  10.1.4             89

"Developer"                                       Intro (P)          1

"Developer's Long Beach Airport                   7.1                63
  Center Submittal"                                                      

"FAA"                                             8.5                85

"Ground Rent"                                     3.1                5    

"Ground Sublease"                                 5.7                48

"include"                                         17.20              115

"including"                                       17.20              115

"Institutional Lender"                            4.3.1              25

"Landlord"                                        Intro (P)          1

"Lease"                                           Intro (P)          1

"leased land"                                     10.1.5             89 
</TABLE>
                                       x
<PAGE>
 
                                 DEFINED WORDS
                                 -------------
                                  (continued)
<TABLE>
<CAPTION>
Defined Word                                       Paragraph        Page
- ------------                                       ---------        ----
<S>                                                <C>              <C> 
"Leasehold Mortgage"                               4.3.2            25

"Leasehold Mortgagee"                              4.3.3            25

"manage"                                           1.5.3            4

"Master FBO Lease"                                 8.2              84

"Net Square Footage"                               3.1.2            6

"New Lease"                                        4.8.1            33

"nondisturbance agreement"                         5.7              48

"partial taking"                                   10.1.2           88

"Predevelopment and Infrastructure                 3.2.2            11
  Costs"                                                                

"Premises"                                         1.2              1

"Project"                                          1.1              1

"Single Lease"                                     7.7              83

"Subdivided Lease"                                 7.6              80

"sublease"                                         5.7              48

"sublessee"                                        5.7              48

"Supplement to Kilroy Industries                   7.1              63
  December 7, 1983, Proposal"                                           

"Termination Notice"                               4.6.1            27

"Termination Notice Period"                        4.6.1            27

"total taking"                                     10.1.1           88 
</TABLE>
                                      xi
<PAGE>
 
                                LEASE AGREEMENT
                                ---------------


          THIS LEASE AGREEMENT (the "Lease") is made this 17th day of July,
1985, by and between KILROY LONG BEACH ASSOCIATES, a California Limited
Partnership, hereinafter referred to as "Developer", and the CITY OF LONG BEACH,
a municipal corporation, hereinafter referred to as "Landlord". Landlord and
Developer hereby agree as follows:



          1. SUBJECT OF LEASE:

             1.1 Purpose of Lease. The purpose of this Lease is to provide for
                 ----------------
the lease and improvement of certain Premises, hereinafter described, as
("Project"). This Lease is entered into in order to develop the Project and not
for speculation in land holding. The development of the Project pursuant to and
as contemplated by this Lease is in the best interests of Landlord and in accord
with the public purposes and provisions of applicable State and local laws and
requirements under which the Project is to be undertaken.

          1.2 Lease of Premises. Subject to the terms, covenants and conditions
              ----------------- 
of this Lease, Landlord hereby leases to Developer and Developer hereby takes
and hires from Landlord that certain real property (the "Premises") legally
described on Exhibit "A" attached hereto and made a part hereof, upon the terms
and conditions hereinafter set forth.

          1.3 The Project Area. The area within which the Project is located in
              ----------------  
the City of Long Beach is the area generally described as the area bounded by
Spring Street on the northwest,

                                       1
<PAGE>
 
Taxiway D on the northeast, the San Diego Freeway on the south and southeast,
and the National Guard facility on the west.

          1.4 The Premises. The Premises include those portions of the Project
              ------------
area illustrated and designated on the site map attached hereto as Exhibit "B"
and forming a part of this Lease and are legally described in the attached
Exhibit "A".

                   1.4.1  Adjacent Properties. Subject to approval of the Board
                          -------------------
          of Water Commissioners of the City of Long Beach, and of Landlord, as
          to that portion under jurisdiction of Landlord, Developer shall have
          the first opportunity to include the adjacent properties ("Adjacent
          Properties") identified in Exhibit "B", into the Premises for creation
          of an integrated development. The fair market value and fair market
          Ground Rent and periodic adjustments thereof of said properties shall
          be as mutually agreed by said Board of Water Commissioners and
          Developer, and by Landlord, as to that portion under jurisdiction of
          Landlord.

                   Development of the Adjacent Properties shall be governed by
          separate leases entered into between Developer and the Board of Water
          Commissioners of the City of Long Beach (and Landlord, as to its
          property). Developer may terminate this Lease in the event Developer
          is unable to enter into option agreements covering the Adjacent
          Properties with the Board of Water Commissioners, and Landlord, on
          terms and conditions mutually satisfactory to the parties thereto,
          within ninety (90) days following execution of this Lease. Developer
          may give Landlord

                                       2
<PAGE>
 
          sixty (60) days notice of its intention to terminate any time within
          said ninety (90) day period. However, the Lease shall not terminate if
          during said sixty (60) day period the Board of Water Commissioners and
          Landlord authorize option agreements as described herein.

              1.5  Parties to the Lease Agreement.
                   ------------------------------
                   1.5.1 Landlord. Landlord is a municipal corporation organized
                         --------
          and existing under the laws of the State of California acting in its
          proprietary capacity. The principal office of Landlord is located at
          City Hall, 333 West Ocean Boulevard, Long Beach, California 90802. The
          term "Landlord" as used in this Lease includes the City of Long Beach,
          California, and any assignee of or successor to its rights, powers and
          responsibilities.

                   1.5.2 Developer. Developer is a California limited
                         ---------
          partnership having a principal place of business at 2250 East Imperial
          Highway, Suite 1200, El Segundo, California 90245. A written agreement
          has been executed creating Developer ("Agreement Establishing
          Developer") an executed copy of which has been delivered to Landlord.
          Developer agrees, upon request of Landlord, to provide Landlord with
          any amendments to the Agreement Establishing Developer, so long as
          Kilroy Long Beach Associates, a California Limited Partnership, is the
          party acting as Developer under this Lease. The provisions of the
          foregoing sentence shall apply to any entity becoming a successor to
          Developer under this Lease or any other lease which may be established
          pursuant hereto covering the

                                       3
<PAGE>
 
          Premises or one or more of the Adjacent Properties.

                   1.5.3  Association by Developer. Notwithstanding any other
                          ------------------------
          provisions hereof, Developer reserves the right, at its discretion, to
          join and associate with other entities in joint ventures, partnerships
          or otherwise for the purpose of leasing and developing the Premises
          and the Adjacent Properties, and Developer may assign this Lease to
          any such entity, provided that Developer, or any partner of
          Developer having a controlling interest in Developer, continues to
          manage and retain policy control over the development and operation of
          the Premises, until such time as Developer's interests under this
          Lease are assigned as permitted under subsection 5.1, below. As used
          herein, "manage" shall mean to direct or supervise the operation and
          execution of the development of the Premises and to have authority to
          act for and bind the entity in all dealings with Landlord under this
          Lease. This definition shall be deemed to require Developer to retain
          policymaking authority.



          2. TERM.
             ----

              2.1 Basic Term. The term of this Lease shall commence on the date
                  ----------
of execution of this Lease and shall continue thereafter for a period of fifty
(50) years.

              2.2 Options for Extensions. Subject to approval by the Long Beach
                  ----------------------
City Council and subject to the review by Landlord of Lease provisions pursuant
to Section 37380(b)(l) of the

                                       4
<PAGE>
 
Government Code, Developer shall have an option for four (4) Lease extensions of
ten (10) years each and a final Lease extension of nine (9) years, so that the
total possible duration of this Lease will be ninety-nine (99) years. Developer
may request at any time after six (6) months following the effective date of
this Lease that Landlord formally consider the granting of such Lease
extensions, and Landlord shall act upon such request within ninety (90) days
after receipt thereof.


          3. RENT:
             ---- 

               3.1 Minimum Ground Rent. From commencement of the term of this
                   -------------------
Lease, the Ground Rent ("Ground Rent") payments shall be as follows:

                   3.1.1  Amount of Ground Rent. Developer shall pay as initial
                          ---------------------
          Ground Rent, the sum of One Million and No/100 Dollars ($1,000,000.00)
          per year, which is stated by the parties to be ten percent (10%) of
          the initial stated value of the land included in the Premises, which,
          in turn is agreed by the parties to be Ten Million and No/100 Dollars
          ($10,000,000.00).

                   3.1.2  Allocation of Ground Rent. Developer initially intends
                          -------------------------
          to develop the Premises as six (6) distinct parcels, which are
          tentatively identified on the preliminary Parcel Map attached hereto
          and marked Exhibit "C" for reference, with one or more buildings per
          parcel. The initial Ground Rent obligation described in this
          subsection 3.1.1 shall be allocated among those parcels in the
          proportion that the net

                                       5
<PAGE>
 
          square footage of land contained in each parcel bears to the net
          square footage of the land in the entire Premises. "Net square
          footage" of land means that portion of the land not subject to
          dedication for public streets and sidewalks.

                   3.1.3 Payment of Ground Rent. The obligation to pay Ground
                         ----------------------
          Rent shall commence as to the first parcel on the date that
          construction commences on that parcel. Construction on the first
          parcel shall commence on or before September 1, 1985, subject to
          granting of all required governmental approvals. The obligation to pay
          Ground Rent shall commence as to the second through sixth parcels on
          the earlier of (a) the date that construction commences on each
          parcel, or (b) one parcel every twelve (12) months following
          commencement of construction on the first parcel. Construction shall
          be deemed to have commenced upon the date of issuance of a foundation
          permit for the first building intended to produce revenue on any given
          parcel ("Commencement of Construction"). Commencement of the initial
          Ground Rent upon all subsequent parcels shall occur, one parcel at a
          time, in the sequence of the numbers of the parcels on the parcel map
          of the Project. However, if Ground Rent is commenced on a parcel in a
          sequence other than the order of numbering of parcels as a result of
          the commencement of construction on such parcel, Developer shall not
          also be required to commence payment of fifty percent (50%) of Ground

                                       6
<PAGE>
 
          Rent on the next numbered parcel. At the next date when payment of
          initial Ground Rent is to be commenced, such rent shall be commenced
          as to the lowest numbered remaining parcel. The shift of sequence of
          required payments resulting from construction on parcels in different
          order than their numbers may delay, but shall not permanently
          terminate the obligation to pay rent as to such parcel.

                   3.1.4 Initial Ground Rent. The initial Ground Rent due for
                         -------------------
          each parcel shall be a sum equal to fifty percent (50%) of the Ground
          Rent attributable to such parcel. Payment of Ground Rent shall
          continue at that rate until either six (6) months after issuance of an
          Initial Temporary Certificate of Occupancy on the building shell or
          commencement of subtenant rent, whichever occurs earlier, at which
          time the full Ground Rent attributable to that parcel shall become
          payable. In the event initial rental payment at the fifty percent
          (50%) level commences on any parcel prior to the commencement of
          construction of that parcel, then payment of full Ground Rent on said
          parcel shall commence not later than sixteen (16) months after the
          commencement of initial rental payments.

                        3.1.4.1 The commencement of a building or buildings on
               more than one parcel in any year shall satisfy Developer's
               obligation to commence payment of rent on parcels in sequence for
               a number of years equal to the number of parcels on

                                       7
<PAGE>
 
               which buildings shall have commenced. Thus, for example, if
               Developer commences construction of buildings as provided for in
               this Lease on four (4) parcels in the first year, no automatic
               annual rent commencement shall occur until the fifth (5th) year,
               in which case initial Ground Rent shall commence as to the lowest
               numbered parcel on which construction has not begun on the fifth
               (5th) anniversary of the date rent first became due on the first
               parcel, unless, in the intervening years, construction shall have
               also commenced on one or more other parcels.

                        3.1.4.2 If initial Ground Rent shall have commenced
               during any lease year on a parcel because construction of
               buildings on a requisite number of parcels has not begun, but
               thereafter, within the same lease year construction of a building
               is begun on another parcel, the initial rent on the vacant parcel
               shall cease upon commencement of construction on the other parcel
               and the obligation to pay rent as described in this Lease shall
               simultaneously shift to the parcel upon which construction has
               begun so that to the greatest extent possible rental obligations
               shall be related to parcels on which construction has commenced
               rather than vacant parcels.

                    3.1.5 Change in Scope of Development. Should the scope of
                          ------------------------------
          development of a building or buildings on

                                       8
<PAGE>
 
          the Premises be substantially changed from the concept of one or more
          buildings on six (6) different parcels, with Landlord's consent as
          provided in subsection 7.6, as for example one large building to be
          constructed upon two or more parcels, Ground Rent shall commence
          simultaneously with respect to all parcels upon which the foundation
          of any such building shall be located.

                    3.1.6 Delays in Commencement of Ground Rent. Developer shall
                          -------------------------------------
          not delay the commencement of payment of Ground Rent for a parcel
          except to the extent of delays incurred for reasons set out in
          subsection 17.3 which render impossible or impractical the
          construction upon said parcel. In such case, a delay in the
          commencement of payment of Ground Rent for a specific parcel shall not
          delay the commencement of payment of Ground Rent for any other parcel,
          except to the extent that the reason for delay in subsection 17.3
          applies directly to such other parcel and renders impossible or
          impractical the construction upon said parcel.

                    3.1.7 Due Dates and Place of Payment. Ground Rents described
                          ------------------------------
          herein shall be payable in installments due the first day of each
          month. Payment shall be made to the City of Long Beach at the office
          of the Airport Manager, 4100 Donald Douglas Drive, Long Beach,
          California 90808. Ground Rent installments will be deemed late on the
          tenth (10th) day of the month and shall bear interest until the
          installment is paid at the rate received by the City of Long Beach on
          its investment 

                                       9
<PAGE>
 
          portfolio during the preceding quarter, provided said interest rate
          shall not exceed twenty percent (20%) per year.

               3.2  Ground Rent Adjustments.
                    ----------------------- 
                    3.2.1 Adjustment Dates. In order to adjust the annual Ground
                          ----------------
          Rent for each parcel (or the entire Premises, if not divided into
          parcels), the fair market land value of each parcel and the prevailing
          rate of return shall be determined in the tenth (10th) year after
          commencement of payment of the full Ground Rent for such parcel, and
          adjusted Ground Rent payments shall take effect on the first (1st) day
          of the eleventh (11th) year. The fair market land value and prevailing
          rate of return for each parcel shall also be determined in the year
          2000, with respect to Ground Rent payable commencing January 1, 2001,
          and every five (5) years thereafter, and the Ground Rent shall be
          adjusted accordingly on the first (1st) day of each sixth (6th) year.
          Said dates of adjustment of Ground Rent shall be referred to for
          convenience as "adjustment dates".

                    3.2.2 Ground Rent Adjustments by Appraisal. With respect to
                          ------------------------------------
          each Ground Rent adjustment date, the fair market land value and
          prevailing rate of return shall be determined by agreement between
          Landlord and Developer, but should they not be able to agree at least
          two hundred ten (210) days prior to an adjustment date, then such fair
          market land value and prevailing rate of return shall be determined by
          appraisal by an 

                                      10
<PAGE>
 
          analysis of comparable land transactions committed to the same usage
          and either zoned for or improved with facilities of similar density
          and height considerations, and/or such other appraisal method(s)
          recognized by the appraisal profession as are appropriate for fair
          market land value appraisals and mutually agreed to by the appraisers
          at time of reevaluation as being appropriate, recognizing market
          conditions that prevail as of the date of value.

                         3.2.2.1 Adjustment for Predevelopment and
                                 ---------------------------------
               Infrastructure Costs. The fair market land value (as agreed upon
               -------------------- 
               by Landlord and Developer or as determined by appraisal) shall be
               adjusted (the "Adjusted Fair Market Land Value") in the
               proportion that Ten Million and No/100 Dollars ($10,000,000.00)
               bears to the original stated land value of the Premises of Ten
               Million and No/100 Dollars ($10,000,000.00), plus the actual
               onsite and off-site "Predevelopment and Infrastructure Costs",
               determined according to subsection 3.8. The Adjusted Fair Market
               Land Value shall be converted into an annual Ground Rent
               obligation based on the prevailing rate of return as determined
               pursuant to subsection 3.2.2.

                    3.2.3 Appraisal. In the event the parties are unable to
                          ---------
          agree upon the fair market rental value or the prevailing rate of
          return or the method of appraisal of the Premises at any adjustment
          date, the 

                                      11
<PAGE>
 
          fair rental value of the subject land and/or the prevailing rate of
          return shall be determined by appraisals prepared by two appraisers,
          one appointed by the Landlord at its expense and one appointed by the
          Developer at its expense, both of whom shall be MAI members of the
          American Institute of Real Estate Appraisers or a successor
          organization in the event the American Institute of Real Estate
          Appraisers ceases to exist. Said appraisers shall be appointed not
          more than six (6) months prior to the commencement of the rental
          adjustment period but, in any event, within thirty (30) days after
          either party has given notice in writing of inability to agree. Both
          appraisals must be completed and submitted to the Landlord and
          Developer respectively within sixty (60) days after the appointment of
          the appraisers. The two appraisals shall be averaged unless the higher
          of the two appraisals exceeds the lesser by ten percent (10%) or more,
          in which case the two appraisers shall appoint a third appraiser, also
          an MAI member of the American Institute. In order to select such third
          appraiser, if the two appraisers do not agree, the appraisers shall
          obtain a list of five appraisers from the President of the American
          Institute of Real Estate Appraisers and shall alternately strike names
          from such list until one remains to become the third appraiser. The
          third appraiser shall be appointed by the first two appraisers within
          fourteen (14) days after notice from either of the parties to this
          Lease 

                                      12
<PAGE>
 
          that the appointment of a third appraiser is necessary. The cost of
          such third appraiser shall be shared equally by the parties to this
          Lease. The third appraiser shall complete and submit the required
          appraisal to both parties within sixty (60) days after appointment.
          All appraisals shall be in the form of written reports supported by
          facts and analysis. The two of the three appraisers arriving at values
          closest to each other shall attempt to concur on a value. If they are
          unable to do so within thirty (30) days, the two closest appraisals
          shall be averaged and that value shall be the fair market value of the
          land or the prevailing rate of return, as appropriate. The total
          appraised value of all parcels shall not exceed the appraised value of
          the Premises. The Adjusted Fair Market Land Value shall be converted
          into an annual Ground Rent obligation based on the prevailing rate of
          return on similar ground leases then current in the market.
          Disagreements between the two appraisers as to the method of appraisal
          shall be resolved by a third appraiser, appointed in the manner
          described in this subsection.

                    3.2.4 Maximum Rent Increase. The increase, if any, in Ground
                          ---------------------
          Rent at the time of any adjustment date shall be limited for parcels
          upon which one or more buildings have been constructed by the increase
          in subtenant rents as described in this section:

                         3.2.4.1 Allocation to Parcels. At the time of execution
                                 ---------------------
               of the Lease, the Ground Rent 

                                      13
<PAGE>
 
               shall be allocated among the parcels within the project in the
               manner set out in subsection 3.1.2. The percentage of rent
               attributable to each parcel shall remain in effect during the
               term of the Lease unless parcel areas change.

                         3.2.4.2. Base Sublease Rental. The base sublease rental
                                  --------------------
               for each parcel shall be the total annualized rent, stabilized to
               exclude free rent, reduced rent or excess tenant improvement
               amortization or other similar concessions or considerations
               measured in the first year in which more than eighty percent
               (80%) of the rentable space on a given parcel is rented, prorated
               to full occupancy.

                         3.2.4.3 Sublease Rental Percentage Change. The sublease
                                 ---------------------------------
               rental percentage change shall be determined by calculating the
               percentage changes in sublease rental between the base sublease
               rental for a parcel described in subsection 3.2.4.2 above and the
               actual sublease rental due to Developer for the same parcel in
               the full year preceding a Ground Rent Adjustment date, stabilized
               to exclude any free rent, reduced rent or excess tenant
               improvement amortization or other similar concessions or 
               considerations.

                         3.2.4.4 Adjusted Ground Rent. The "Adjusted Ground
                                 --------------------
               Rent" for each parcel at any given adjustment period shall be the
               lesser of the Adjusted Fair Market Rental Value for such parcel

                                      14
<PAGE>
 
              as determined in subsection 3.2.2 above or the initial Ground Rent
              for such parcel plus the product of the Sublease Rental Percentage
              Change determined in 3.2.4.3 above times the initial Ground Rent
              for such parcel. To the extent that the Adjusted Fair Market
              Rental Value is greater than the Adjusted Ground Rent, the
              difference may be carried forward into the next five (5) year
              adjusted rental period but not into any subsequent five (5) year
              adjusted rental periods, and thereby recovered by Landlord. The
              amount of Ground Rent during a five (5) year adjusted rental
              period where there has been such a carry forward shall not exceed
              one hundred ten percent (110%) of the fair market Ground Rent as
              determined for that period.

                       3.2.4.5  Sale or Assignment of Leasehold Interest. Should
                                ----------------------------------------
              Developer sell, assign or otherwise transfer its leasehold
              interest to an owner-user such that sublease rental is not paid to
              Developer, the fair market sublease rental for such building,
              using the criteria and methods set out in subsection 3.2.2, shall
              become the basis for calculating the maximum rental adjustment
              using the process described in 3.2.4.3 above.

              3.3 Ground Rent Adjustments Following Reconstruction. Developer
                  ------------------------------------------------ 
contemplates, pursuant to Section 11 hereof, that during the term of this Lease,
any or all of the buildings devel-

                                      15
<PAGE>
 
oped on the Premises may be demolished and new buildings constructed in their
place in order to meet the then current market demand, subject to Landlord
approval pursuant to Section 7. In the event of such demolition and new
construction on a particular parcel, the provisions of subsection 3.2 shall be
modified with respect to such parcel as set forth below in subsections 3.3.1 and
3.3.2. This subsection 3.3 shall not apply to demolition and new construction
which is due to damage or destruction, as described in subsection 6.3, where
said new construction is limited to one for one replacement of useable or
rentable floor area in the same general building configuration as that which
previously existed.

                   3.3.1  Ground Rent Adjustments. Ground Rent for such parcel
                          -----------------------
          shall be adjusted according to the process set out in subsections
          3.2.2 and 3.2.3 but the limitations in subsection 3.2.4 shall not
          apply to such adjustment.

                       3.3.1.1  Adjustment Date. The adjustment shall be
                                ---------------
              effective either six (6) months after issuance of an Initial
              Temporary Certificate of Occupancy of the building shell or
              commencement of subtenant rent, whichever occurs earlier; or

                       3.3.1.2 Alternate Adjustment Date. In the event a regular
                               -------------------------
              five (5) year Ground Rent adjustment date for the parcel, as
              established in subsection 3.2.1, occurs after commencement of
              demolition of a building on said parcel and prior to completion of
              construction of a new building in 

                                      16
<PAGE>
 
              its place, said adjustment shall take place on schedule and shall
              be based upon the assumption that construction of the planned new
              building has been completed.

                   3.3.2  No Adjustment At Next Scheduled Adjustment Date. There
                          -----------------------------------------------
          shall be no Ground Rent adjustment for such parcel at the next
          scheduled adjustment date, but all subsequent Ground Rent adjustments
          shall occur on the schedule set out in subsection 3.2.1.

                   3.3.3  Maximum Ground Rent Adjustment. For purposes of
                          ------------------------------
          determining the maximum Ground Rent increase under subsection 3.2.4
          at the time of the next Ground Rent adjustment and thereafter, the
          base sublease rental described in subsection 3.2.4 shall be
          established with respect to the new building or buildings constructed
          on the parcel.

             3.4 Adjustments to Ground Rent During Option Term. At the
                 ---------------------------------------------
commencement of each option term, and at the end of each five (5) years of each
option term, the Ground Rent shall be determined as provided in subsection
3.2.2, but with no adjustment thereto as is provided in said subsection 3.2.2.1.
The fair market land value shall be converted into an annual Ground Rent
obligation based on the rate of return then current in the market for parcels
which are currently and fairly appraised.

             3.5 Maximum Ground Rent Increase. However, the increase in Ground
                 ----------------------------
Rent at the end of five (5) years of each option term shall be subject to the
provisions of subsection 3.2.4, with the first year of the option term as the
base period

                                      17
<PAGE>
 
for determining sublease rental and the fifth (5th) year of the option term
being the adjustment year for determining actual rental received, both to be
stabilized to exclude any free rent, reduced rent, excess tenant improvement
amortization or other similar concessions or considerations. The Ground Rent
commencing the sixth (6th) year of any option term cannot increase at a
percentage rate greater than the percentage increase in sublease rentals from
the base year to the adjustment year.

             3.6 Definition of Predevelopment and Infrastructure Costs. For
                 -----------------------------------------------------
purposes of this Lease, Predevelopment and Infrastructure Costs shall include
all costs actually incurred by Developer for those items identified in Exhibit
"D", subject to the limitations of this subsection, which costs are necessary to
initially render the Premises suitable for development according to Developer's
Basic Concept Documents as described in Section 7. Predevelopment and
Infrastructure Costs shall include all off-site and on-site improvements
required to create six (6) buildable parcels, but shall not include any costs
directly associated with the construction of buildings or parking upon such
parcels. It is understood and agreed by Landlord that certain improvements,
particularly landscaping, may exceed the standards normally used by the City of
Long Beach, and that such improvements shall be included in Predevelopment and
Infrastructure Costs to the extent they are consistent with Developer's Basic
Concept Documents and landscape plans described in Section 7.

             3.7 Approval of Improvement Plans. Prior to commencement of any
                 -----------------------------
construction on the Premises, Developer shall submit to Landlord engineering
plans and costs estimates for

                                      18
<PAGE>
 
those items identified in Exhibit "D" which are included in Predevelopment and
Infrastructure Costs. Specifications for all improvements shall meet or, at
Developer's election, exceed the standard specifications of the City of Long
Beach for such improvements. Landlord shall review said plans for conformity
with the Basic Concept Documents and approve or disapprove them as to such
conformity in accordance with the procedures and criteria set out in subsection
7.3.7.

             3.8 Determination of Predevelopment and Infrastructure Costs.
                 --------------------------------------------------------
Following receipts of bids, and prior to the award of a contract for
construction of items shown on the plans approved pursuant to subsections 3.7
and 7.5.3 ("Approved Plans") and identified in Exhibit "D", Developer shall
submit to Landlord all bids received and a statement indicating which bid
Developer intends to accept. The bid shall identify each item of cost in the
same manner as the estimate of costs submitted pursuant to subsection 3.7.
Landlord shall have the right to assert that any such item of cost is excessive
on the basis of Landlord's experience with comparable construction, taking into
consideration the total cost of the work, and Developer and Landlord shall
attempt to arrive at an agreed cost for said item. In the event Developer and
Landlord are unable to arrive at an agreed cost, then Developer and Landlord
shall accept the decision of a jointly appointed independent registered civil
engineer with experience in similar matters, who shall be directed to consider
the positions of both Developer and Landlord and to establish within five
(5) days, or such longer time as may be mutually agreed by Developer and
Landlord, the agreed cost for any contested items,

                                      19
<PAGE>
 
again taking into consideration the total cost of the work. 

             The actual bid cost, or the agreed cost, where the bid cost is
disputed, shall be deemed to be the actual cost of construction for each cost
item to the extent that such costs are actually incurred as a result of the
installation or construction of items or quantities of materials. Landlord shall
have the right to monitor the construction of all items included in the Approved
Plans to ensure that such construction is in accordance with the Approved Plans
and the approved costs. During the period of construction, Landlord, through its
Director of Public Works, and Developer may agree upon modifications to the
Approved Plans and to the bid costs or agreed costs as may be required by
unforseen conditions.

             Upon completion of construction, the aggregate of all costs which
have been approved by the operation of this subsection, and which are actually
incurred, including costs under paragraph 18 of Exhibit "D", less any costs paid
by Landlord, shall become the amount of "Predevelopment and Infrastructure
Costs" referred to in subsection 3.2.2.1, provided that such amount shall not
exceed Nine Million and No/100 Dollars ($9,000,000.00), less any costs paid by
Landlord. Landlord shall have the right to audit and review all contracts,
invoices, payments, and other pertinent materials as may be necessary to confirm
the actual costs incurred.

             3.9 Construction by Landlord. Landlord shall design and install all
                 ------------------------
traffic signals and modifications thereto included in the plans approved
pursuant to subsection 3.7. Such installation shall be paid for by Landlord or
Developer, at Land-

                                      20
<PAGE>
 
lord's option. In addition, Landlord, prior to September 1, 1985, and at its
sole option, may elect to construct and pay for all Predevelopment and
Infrastructure Costs, except landscaping and appurtenant structures. All
Predevelopment and Infrastructure Costs not paid by Landlord shall be paid by
Developer. Construction done by Landlord shall be in accordance with Developer's
plans approved pursuant to subsection 3.7 and in accordance with Developer's
construction schedule, which shall be reasonably achievable by industry
standards.

             3.10  Phasing of Improvements. Developer shall have the right to
                   -----------------------
design and construct improvements in phases, in accordance with a phasing plan
which shall be approved by Landlord. Plans, estimates of costs, and bids for
phases of work shall be treated in the same manner as set out in subsections 3.7
through 3.9, provided that the total cost of all phased improvements shall not
exceed the Nine Million and No/100 Dollars ($9,000,000.00) limit on the total of
all Predevelopment and Infrastructure Costs.

             3.11 Exceptions to Maximum Predevelopment and Infrastructure Costs.
                  -------------------------------------------------------------
Landlord agrees that, due to the uncertain nature of the following costs which
are beyond the control of Developer, the Nine Million and No/100 Dollars
($9,000,000.00) limit on "Predevelopment and Infrastructure Costs," as reduced
by any amounts paid or carried out by Landlord, may be exceeded to the extent
that these costs, when added to other Predevelopment and Infrastructure Costs
paid by Developer, actually exceeds Nine Million and No/100 Dollars
($9,000,000.00):

                   3.11.1  Rights-of-Way. Costs of right-of-way
                           -------------

                                      21
<PAGE>
 
          acquisition and of the acquisition of leasehold interest as may be
          necessary in order to acquire needed rights-of-way.

                   3.11.2  Sewer and Storm Drain. Construction of sewer and
                           ---------------------
          storm drain lines from the ultimate downstream point of connection to
          the Premises.

                   3.11.3  Traffic Mitigation. Off-site street improvements and
                           ------------------
          traffic mitigation measures required by City, other than those
          indicated on the attached Exhibit "F".

              In the event that the costs of items in subsections 3.11.1, 3.11.2
and 3.11.3, which are paid by Developer, exceed Two Million Dollars
($2,000,000.00), then Developer shall receive credit against future increases in
Ground Rent over the base rent of One Million Dollars ($1,000,000.00) per year,
for the actual amount that said costs paid by Developer exceed Two Million
Dollars ($2,000,000.00), plus interest. Interest shall commence as costs of
items in subsections 3.11.1, 3.11.2 and 3.11.3 are incurred, and shall be
charged on the declining balance of the amount of rent credit due to Developer
until the full rent credit has been given. Said interest shall be at the average
of the prime interest rates quoted monthly by Security Pacific National Bank
during the term that said interest is accrued to the date credited.



          4.  LEASEHOLD MORTGAGES:
              -------------------
              4.1  Leasehold Mortgage Authorized. On one or more occasions
                   -----------------------------
Developer may take back a Purchase Money Leasehold Mort-

                                      22
<PAGE>
 
gage upon a sale and assignment of the Leasehold Estate created by this Lease or
may mortgage or otherwise encumber Developer's Leasehold Estate to an
Institutional Lender (as hereinafter defined), under one or more Leasehold
Mortgages and assign this Lease as security for such Mortgage or Mortgages.

              4.2  Notice to Landlord.
                   ------------------
                   4.2.1  Leasehold Mortgage Requirements. If Developer shall,
                          -------------------------------
          on one or more occasions, take back a Purchase Money Leasehold
          Mortgage upon a sale and assignment of the Leasehold Estate or shall
          mortgage Developer's Leasehold Estate to an Institutional Lender, and
          if the Holder of such Leasehold Mortgage shall provide Landlord with
          notice of such Leasehold Mortgage together with a true copy of such
          Leasehold Mortgage and the name and address of the Mortgagee, Landlord
          and Developer agree that, following receipt of such notice by
          Landlord, the provisions of this Section 4 shall apply in respect to
          each such Leasehold Mortgage.

                   4.2.2  Assignment of Leasehold Mortgage. In the event of any
                          --------------------------------
          assignment of a Leasehold Mortgage or in the event of a change of
          address of a Leasehold Mortgagee or of an assignee of such Mortgage,
          notice of the new name and address shall be provided to Landlord
          within ten (10) days after completion of such assignment.

                   4.2.3  Landlord's Acknowledgement of Notice. Landlord shall
                          ------------------------------------
          promptly upon receipt of a communication purporting to constitute the
          notice provided for by subsections 4.2.1 or 4.2.2, above, acknowledge
          by an

                                      23
<PAGE>
 
          instrument in recordable form receipt of such communication as
          constituting the notice provided for by subsections 4.2.1 or 4.2.2,
          or, in the alternative, notify Developer and the Leasehold Mortgagee
          of the rejection of such communication as not conforming with the
          provisions of subsections 4.2.1 or 4.2.2, and specify the specific
          basis of such rejection.

               4.2.4 Developer to Provide Copies. After Landlord has received
                     ---------------------------
          the notice provided for by subsections 4.2.1 or 4.2.2 above,
          Developer, upon being requested to do so by Landlord, shall within ten
          (10) days provide Landlord with copies of the note or other obligation
          secured by such Leasehold Mortgage and of any other documents
          pertinent to the Leasehold Mortgage as specified by Landlord. If
          requested to do so by Landlord, Developer shall thereafter also
          provide Landlord from time to time with a copy of each amendment or
          other modification or supplement to such instruments. All recorded
          documents shall be accompanied by the appropriate certification of the
          Custodian of the Recording Office as to their authenticity as true and
          correct copies of the official records and all non-recorded documents
          shall be accompanied by a certification by Developer that such
          documents are true and correct copies of the originals. From time to
          time upon being requested to do so by Landlord, Developer shall also
          notify Landlord of the date and place of recording and other pertinent
          recording data with


                                      24
<PAGE>
 
          respect to such instruments as have been recorded.

              4.3  Definitions.
                   -----------
                   4.3.1  Institutional Lender. The term "Institutional Lender"
                          --------------------
          as used in this Section 4 shall refer to a savings bank, savings and
          loan association, commercial bank, trust company, credit union,
          insurance company, college, university, real estate investment trust
          or pension fund. The term "Institutional Lender" shall also include
          other lenders of substance which have assets in excess of Fifty
          Million and No/100 Dollars ($50,000,000.00) at the time the Leasehold
          Mortgage is made.

                   4.3.2  Leasehold Mortgage. The term "Leasehold Mortgage" as
                          ------------------
          used in this Section 4 shall include a mortgage, a deed of trust, a
          deed to secure debt, or other security instrument by which Developer's
          Leasehold Estate is mortgaged, conveyed, assigned or otherwise
          transferred, to secure a debt or other obligation.

                   4.3.3  Leasehold Mortgagee. The term "Leasehold Mortgagee" as
                          -------------------
          used in this Section 4 shall refer to a holder of a Leasehold Mortgage
          in respect to which the notice provided for by subsection 4.2 has been
          given and received and as to which the provisions of this Section 4
          are applicable.

              4.4  Consent of Leasehold Mortgagee Required. No cancellation,
                   ---------------------------------------
surrender or modification of this Lease shall be effective as to any Leasehold
Mortgagee unless consented to in writing by such Leasehold Mortgagee.

                                      25
<PAGE>
 
              4.5 Default Notice. Landlord upon providing Developer any notice
                  --------------
of: (i) default under this Lease, (ii) a termination of this Lease, or (iii) a
matter of which Landlord may predicate or claim a default, shall at the same
time provide a copy of such notice to every Leasehold Mortgagee. No such notice
by Landlord to Developer shall be deemed to have been duly given unless and
until a copy thereof has been so provided to every Leasehold Mortgagee having a
lien upon the Premises. From and after the date such notice has been given to a
Leasehold Mortgagee, such Leasehold Mortgagee shall have the same period, after
giving of such notice upon it, for remedying any default or acts or omissions
which are the subject matter of such notice or causing the same to be remedied,
as is given Developer after the giving of such notice to Developer, plus in each
instance, the additional periods of time specified in subsections 4.6 and 4.7 to
remedy, commence remedying or cause to be remedied the defaults or acts or
omissions which are the subject matter of such notice specified in any such
notice. Landlord shall accept such performance by or at the instigation of such
Leasehold Mortgagee as if the same had been done by Developer. Developer
authorizes each Leasehold Mortgagee to take any such action at such Leasehold
Mortgagee's option and does hereby authorize entry upon the Premises by the
Leasehold Mortgagee for such purpose.

              4.6  Notice to Leasehold Mortgagee.
                   -----------------------------
                   4.6.1  Landlord's Termination Notice. Anything contained in
                          -----------------------------
          this Lease to the contrary notwithstanding, if any default shall occur
          which entitles Landlord to

                                      26
<PAGE>
 
          terminate this Lease, Landlord shall have no right to terminate this
          Lease unless, following the expiration of the period of time given
          Developer to cure such default or the act or omission which gave rise
          to such default, Landlord shall notify every Leasehold Mortgagee of
          Landlord's intent to so terminate ("Termination Notice") at least
          thirty (30) days in advance of the proposed effective date of such
          termination if such default is capable of being cured by the payment
          of money ("Termination Notice Period"), and at least sixty (60) days
          in advance of the proposed effective date of such termination if such
          default is not capable of being cured by the payment of money (also a
          "Termination Notice Period"). The provisions of subsection 4.7, shall
          apply if, during such thirty (30) or sixty (60) day Termination Notice
          Period, any Leasehold Mortgagee shall:

                   4.6.1.1 Notify Landlord of such Leasehold Mortgagee's desire
             to nullify such notice; and

                   4.6.1.2 Pay or cause to be paid all Ground Rent, additional
             rent and other payments then due and in arrears as specified in the
             Termination Notice to such Leasehold Mortgagee and which may become
             due during such thirty (30) or sixty (60) day Termination Notice
             Period; and

                   4.6.1.3 Comply or in good faith, with reasonable diligence
             and continuity, commence to comply with all nonmonetary
             requirements of this

                                      27
<PAGE>
 
             Lease then in default and reasonably susceptible of being complied
             with by such Leasehold Mortgagee; provided however, that such
             Leasehold Mortgagee shall not be required during such sixty (60)
             day Termination Notice Period to cure or commence to cure any
             default consisting of Developer's failure to satisfy and discharge
             any lien, charge or encumbrance against the Developer's interest in
             this Lease or the Premises junior in priority to the lien of the
             mortgage held by such Leasehold Mortgagee.

                   4.6.2 Proper Address of Leasehold Mortgagee. Any notice to be
                         -------------------------------------
          given by Landlord to a Leasehold Mortgagee pursuant to any provision
          of this Section 4 shall be deemed properly addressed if sent to the
          Leasehold Mortgagee who served the notice referred to in subsection
          4.2.1 unless notice of a change of Mortgage ownership has been given
          to Landlord pursuant to subsection 4.2.2.

              4.7  Procedure on Default.
                   --------------------
                   4.7.1 Extension of Termination Notice Period. If Landlord
                         --------------------------------------
          shall elect to terminate this Lease by reason of any default of
          Developer, and a Leasehold Mortgagee shall have proceeded in the
          manner provided for by subsection 4.6, the specified date for the
          termination of this Lease as fixed by Landlord in its Termination
          Notice shall be extended for a period of six (6) months, provided that
          such Leasehold Mortgagee shall during such six (6) month period:


                                      28
<PAGE>
 
                   4.7.1.1 Payment of Monetary Obligations. Pay or cause to be
                           -------------------------------
          paid the Ground Rent, additional rent and other monetary obligations
          of Developer under this Lease as the same become due, and continue its
          good faith efforts to perform all of Developer's other obligations
          under this Lease.

                        4.7.1.2 Foreclosure of Leasehold Mortgage. If not
                                ---------------------------------
               enjoined or stayed, take steps to acquire or sell Developer's
               interest in this Lease by foreclosure of the Leasehold Mortgage
               or other appropriate means and prosecute the same to completion
               with due diligence.

                       4.7.2 Cure of Default. If at the end of such six (6)
                             ---------------
               month period such Leasehold Mortgagee is complying with
               subsections 4.7.1.1 and 4.7.1.2, this Lease shall not then
               terminate, and the time for completion by Leasehold Mortgagee of
               its proceedings shall continue so long as such Leasehold
               Mortgagee is enjoined or stayed and thereafter for so long as
               such Leasehold Mortgagee proceeds to complete steps to acquire or
               sell Developer's interest in this Lease by foreclosure of the
               Leasehold Mortgage or by other appropriate means with reasonable
               diligence and continuity. Nothing in this subsection 4.7,
               however, shall be construed to extend this Lease beyond the
               original term thereof as extended by any options to extend the
               term of this Lease properly exercised by Developer or a Leasehold
               Mortgagee in accordance with subsection 2.1, nor to

                                      29
<PAGE>
 
               require a Leasehold Mortgagee to continue such foreclosure
               proceedings after the default has been cured. If the default
               shall be cured and the Leasehold Mortgagee shall discontinue such
               foreclosure proceedings, this Lease shall continue in full force
               and effect as if Developer had not defaulted under this Lease.

                       4.7.3 Compliance of Leasehold Mortgagee. If a Leasehold
                             ---------------------------------  
               Mortgagee is complying with subsection 4.7.1, upon the
               acquisition of Developer's Leasehold Estate herein by such
               Leasehold Mortgagee or its designee or any other purchaser at a
               foreclosure sale or otherwise this Lease shall continue in full
               force and effect as if Developer had not defaulted under this
               Lease.

                       4.7.4 Leasehold Mortgage Not an Assignment. For the
                             ------------------------------------
               purposes of this Section 4, the making of a Leasehold Mortgage
               issued by an institutional lender shall not be deemed to
               constitute an assignment or transfer of this Lease or of the
               Leasehold Estate hereby created, nor shall any Leasehold
               Mortgagee, as such, be deemed to be an assignee or transferee of
               this Lease or of the Leasehold Estate hereby created so as to
               require such Leasehold Mortgagee, as such, to assume the
               performance of any of the terms, covenants or conditions on the
               part of Developer to be performed hereunder, but the purchaser at
               any sale of this Lease and of the Leasehold Estate hereby created
               in any proceedings for the foreclosure of any Leasehold Mortgage,
               or the assignee or transferee of this Lease and of the

                                      30
<PAGE>
 
               Leasehold Estate hereby created under any instrument of
               assignment or transfer in lieu of the foreclosure of any
               Leasehold Mortgage shall be deemed to be an assignee or
               transferee within the meaning of this Section 4, and shall be
               deemed to have agreed to perform all of the terms, covenants and
               conditions on the part of Developer to be performed hereunder
               from and after the date of such purchase and assignment, but only
               for so long as such purchaser or assignee is the owner of the
               Leasehold Estate. Provided, however, that Developer shall, as to
               such Leasehold Mortgagee, provide to Landlord the same
               information which Developer must supply pursuant to this Lease as
               assignee.

                       4.7.5 Obligation of Leasehold Mortgagee to Repair or
                             ----------------------------------------------
               Reconstruct. If the Leasehold Mortgagee or its designee shall
               -----------
               become holder of the Leasehold Estate, and if the buildings and
               improvements on the Premises shall have been or be come
               materially damaged on, before or after the date of such purchase
               and assignment, the Leasehold Mortgagee or its designee shall be
               obligated to repair, replace or reconstruct the building or other
               improvements only to the extent of the net insurance proceeds
               received by the Leasehold Mortgagee or its designee by reason of
               such damage. However, should such net insurance proceeds be
               insufficient to repair, replace or reconstruct the building or
               other improvements to the extent required by subsection 6.3, and
               should the Leasehold Mortgagee or its

                                      31
<PAGE>
 
               designee choose not to fully reconstruct the building or other
               improvements to the extent required by subsection 6.3, such
               failure shall constitute an event of default under this Lease
               which shall entitle Landlord to commence proceedings to terminate
               the Lease.

                       4.7.6 Leasehold Mortgagee's Right to Transfer. Any
                             --------------------------------------- 
               Leasehold Mortgagee or other acquirer of the Leasehold Estate of
               Developer pursuant to foreclosure, assignment in lieu of
               foreclosure or other proceedings may, upon acquiring Developer's
               Leasehold Estate, without further consent of Landlord, assign
               the Leasehold Estate one time on such terms and to such persons
               and organizations as are acceptable to such Mortgagee or acquirer
               and thereafter be relieved of all obligations under this Lease;
               provided that such assignee has delivered to Landlord its written
               agreement to be bound by all of the provisions of this Lease. Any
               further attempts by the Leasehold Mortgagee to assign shall
               comply with the provisions of this Lease relating to Assignment.

                       4.7.7 Leasehold Mortgagee Transfer a Permitted Sale.
                             ---------------------------------------------
               Notwithstanding any other provisions of this Lease, any sale of
               this Lease and of the Leasehold Estate hereby created in any
               proceedings for the foreclosure of any Leasehold Mortgage, or the
               assignment or transfer of this Lease and of the Leasehold Estate
               hereby create in lieu of the foreclosure of any Leasehold
               Mortgage shall be deemed to be a permitted sale,

                                      32
<PAGE>
 
               transfer or assignment of this Lease and of the Leasehold Estate
               hereby created.

                  4.8  New Lease.
                       ---------
                       4.8.1 Terms of New Lease. In the event of the termination
                             ------------------
               of this Lease as a result of Developer's default Landlord shall,
               in addition to providing the notices of default and termination
               as required by subsections 4.5 and 4.6, provide each Leasehold
               Mortgagee with written notice that the Lease has been terminated,
               together with a statement of all sums which would at that time be
               due under this Lease but for such termination, and of all other
               defaults, if any, then known to Landlord. Landlord agrees to
               enter into a new lease ("New Lease") of the Premises with such
               Leasehold Mortgagee, or its designee for the remainder of the
               term of this Lease, effective as of the date of termination, at
               the Ground Rent and additional rent, and upon the terms,
               covenants and conditions, including all first rights of refusal
               and options to renew or purchase, but excluding requirements
               which are not applicable or which have already been fulfilled of
               this Lease, provided:

                         4.8.1.1  Written Request to Landlord. Such Leasehold
                                  ---------------------------
                   Mortgagee shall make written request upon Landlord for such
                   New Lease within thirty (30) days after the date such
                   Leasehold Mortgagee receives Landlord's Notice of Termination
                   of this Lease given pursuant to this subsection 4.8.

                         4.8.1.2  Payment of Obligations. Such
                                  ----------------------

                                      33
<PAGE>
 
           Leasehold Mortgagee or its designee shall pay or cause to be paid to
           Landlord at the time of execution and delivery of such New Lease, any
           and all sums which would at the time of execution and delivery
           thereof be due pursuant to this Lease but for such termination and,
           in addition thereto, all reasonable expenses, including reasonable
           attorney's fees, which Landlord shall have incurred by reason of such
           termination and the execution and delivery of the New Lease and which
           would not otherwise have been received by Landlord from Developer or
           other party in interest under Developer. In the event of a
           controversy as to the amount to be paid to Landlord pursuant to this
           subsection 4.8.1.2, the payment obligation shall be satisfied if
           Landlord shall be paid the amount not in controversy, and the
           Leasehold Mortgagee or its designee shall agree to pay any additional
           sum ultimately determined to be due plus interest at the rate set
           forth in subsection 3.1.7, and such obligation shall be adequately
           secured.

                 4.8.1.3  Remedy of Developer's Defaults. Such Leasehold 
                          ------------------------------
           Mortgagee or its designee shall agree to remedy any of Developer's
           defaults of which said Leasehold Mortgagee is or may be notified by
           Landlord's Notice of Termination and which are reasonably susceptible
           of being so cured by Leasehold Mortgagee or its designee.

                                      34
<PAGE>
 
                 4.8.1.4  New Lease to Have First Priority. Any New Lease made
                          --------------------------------
           pursuant to this subsection 4.8 and any Subdivided Lease entered into
           pursuant to subsection 7.6 and any Single Lease entered into pursuant
           to subsection 7.7, shall be prior to any mortgage or other lien,
           charge or encumbrance on the fee of the Premises and the Developer
           under such New Lease, Single Lease or Subdivided Lease, as the case
           may be, shall have the same right, title and interest in and to the
           Premises and the buildings and improvements thereon as Developer had
           under this Lease.

                 4.8.1.5  Developer's Obligations Under New Lease. The Developer
                          ---------------------------------------
           under any such New Lease, Single Lease or Subdivided Lease shall be
           liable to perform the obligations imposed on the Developer by such
           New Lease, Single Lease or Subdivided Lease only during the period
           such person or entity has ownership of such Leasehold Estate.

           4.9  New Lease Priorities.  If more than one Leasehold Mortgagee 
                --------------------
shall request a New Lease pursuant to subsection 4.8.1, Landlord shall enter
into such New Lease with the Leasehold Mortgagee whose mortgage is prior in lien
or with the designee of such Leasehold Mortgagee. Landlord, without liability to
Developer or any Leasehold Mortgagee with an adverse claim, may rely upon a
mortgagee title insurance policy issued by a responsible title insurance company
doing business within the State of California as the basis for determining the
appropriate Leasehold Mortgagee

                                      35
<PAGE>
 
who is entitled to such New Lease.

                 4.10  Eminent Domain.  Developer's share, as provided by 
                       --------------
subsection 10.3, of the proceeds arising from an exercise of the power of
Eminent Domain shall, subject to the provisions of such subsection 10.3, be
disposed of as provided for by any Leasehold Mortgagee.

                 4.11  Notice of Arbitration.  Landlord shall give each 
                       ---------------------
Leasehold Mortgagee prompt notice of any appraisal, arbitration or legal
proceedings between Landlord and Developer involving obligations under this
Lease. Landlord shall give the Leasehold Mortgagee notice of, and a copy of any
award or decision made in any such proceedings, which shall be binding on all
Leasehold Mortgagees.

                 4.12  Amendment to Facilitate Leasehold Financing. Landlord 
                       ------------------------------------------- 
hereby agrees that if any Institutional Lender to whom Developer proposes to
make a Leasehold Mortgage on Developer's Leasehold Estate shall require as a
condition to making any loan secured by such mortgage that Landlord agree to
modifications of this Lease, then Landlord agrees that it will enter into an
agreement with Developer in recordable form making the modifications that are
requested by such lender, provided that such changes do not adversely affect any
right of Landlord under this Lease.

                 4.13  Security Deposit.  If any Leasehold Mortgagee, its 
                       ---------------- 
designee or other purchaser has acquired the Leasehold Estate of Developer
pursuant to foreclosure, conveyance in lieu of foreclosure or other proceedings,
or has entered into a New Lease with Landlord in accordance with subsection 4.8,
such Leasehold

                                      36
<PAGE>
 
Mortgagee, its designee or other purchaser shall succeed to the rights of
Developer, if any, in and to the security deposits paid by Developer to Landlord
pursuant to subsections 16.1 and 16.2. In such event, Developer shall no longer
have any rights to such security deposits, and Landlord shall hold such security
deposits for and on behalf of such Leasehold Mortgagee, its designee or other
purchaser.

                 4.14  Estoppel Certificate.  Landlord shall at any time and 
                       --------------------
from time to time hereafter, but not more frequently than twice in any one-year
period (or more frequently if such request is made in connection with any sale
or mortgaging of Developer's Leasehold Interest or permitted subletting by
Developer), within ten (10) days after written request of Developer to do so,
certify by written instrument duly executed and acknowledged to any Mortgagee or
purchaser, or proposed Mortgagee or proposed purchaser, or any other person,
firm or corporation specified in such request: (i) as to whether this Lease has
been supplemented or amended, and if so, the substance and manner of such
supplement or amendment; (ii) as to the validity and force and effect of this
Lease, in accordance with its tenor; (iii) as to the existence of any default
hereunder; (iv) as to the existence of any offsets, counter claims or defenses
hereto on the part of Developer; (v) as to the commencement and expiration dates
of the term of this Lease; and (vi) as to any other matters as may be reasonably
so requested. Any such certificate may be relied upon by Developer and any other
person, firm or corporation to whom the same may be exhibited or delivered, and
the contents of such certificate shall be binding on Landlord.

                                      37
<PAGE>
 
Any party requesting such estoppel certificate shall reimburse Landlord for its
costs and expenses incurred in issuing such certificate.

                 4.15  Notices.  Notices from Landlord to the Leasehold 
                       -------
Mortgagee shall be mailed to the address furnished Landlord pursuant to
subsection 4.2 , and those from the Leasehold Mortgagee to Landlord shall be
mailed to the address designated pursuant to the provisions of subsection 1.5.1
hereof, attention the City Manager. Such notices, demands and requests shall be
given in the manner described in subsection 17.1 and shall in all respects be
governed by the provisions of that subsection.

                 4.16  Erroneous Payments.  No payment made to Landlord by a 
                       ------------------
Leasehold Mortgagee shall constitute agreement that such payment was, in fact,
due under the terms of this Lease; and a Leasehold Mortgagee having made any
payment to Landlord pursuant to Landlord's wrongful, improper or mistaken notice
or demand shall be entitled to the return of any such payment or portion thereof
provided such Leasehold Mortgagee shall have made demand therefor not later than
ninety (90) days after the date of its payment.

                 4.17  Request for Notice for Benefit of Landlord. Immediately 
                       ------------------------------------------ 
after recording any Leasehold Mortgage encumbering Developer's Leasehold Estate,
Developer, at Developer's expense, shall cause to be recorded in the Office of
the Recorder of Los Angeles County, California, a written request of notice
under Section 2924(b) of the California Civil Code providing that a copy of any
notice of default and a copy of any notice of sale under such Leasehold Mortgage
shall be delivered to Landlord as

                                      38
<PAGE>
 
provided for under said Section 2924(b) of the California Civil Code. Such
request shall be executed by Landlord. Concurrently, with Developer's forwarding
such notice for recordation, Developer shall furnish to Landlord a complete copy
of the Leasehold Mortgage and the note secured thereby, together with the name
and address of the holder thereof. Said note and mortgage are to be kept by
Landlord on a confidential basis to the extent permitted by law.

                 4.18  Release or Forebearance.  If any such lender shall fail 
                       -----------------------
or refuse to comply with any and all of the conditions of this section, then and
thereupon Landlord shall be released from its covenant of forebearance with such
lender herein contained.

                 4.19  Notice.  Landlord's obligation to observe its covenants 
                       ------
of forebearance in this section for the benefit of any lender on the security of
the Leasehold Estate, except as may be otherwise provided by law, shall be
conditioned upon there having been first delivered to the Airport Manager of the
City of Long Beach, a written notice of such encumbrance which shall state the
name and address of such lender for the purpose of enabling notices to be given
under subsection 4.2 above.

                 4.20  No Merger.  No merger of Developer's Leasehold Estate 
                       ---------
into Landlord's fee title shall result by reason of the ownership of Landlord's
or Developer's estates by the same party or by reason of any other
circumstances, without the prior consent of any and all lenders on the security
of the Leasehold Estate.

                 4.21  No Payment by Landlord.  Landlord shall not be required 
                       ----------------------
to execute any instrument which would obligate Land-

                                      39
<PAGE>
 
lord to the payment of any loan or any part thereof.

                 4.22  Self Liquidating Mortgage.  The Leasehold Mortgage shall 
                       -------------------------
be a self liquidating mortgage, to be paid over a period not longer than elapses
up to three (3) years prior to the end of the term of this Lease, or any option
term if such option has been exercised.

                 4.23  Leasehold Mortgagee Need Not Cure Specified Defaults.  
                       ----------------------------------------------------
Nothing herein contained shall require any Leasehold Mortgagee or its designee
as a condition to its exercise of right hereunder to cure any default of
Developer which cannot be cured by such Leasehold Mortgagee or its designee, in
order to comply with the provisions of subsections 4.6 or 4.7 or as a condition
of entering into the New Lease provided for by subsection 4.8.

                 4.24  Casualty Loss.  A Standard Mortgagee Clause naming each 
                       -------------
Leasehold Mortgagee may be added to any and all insurance policies required to
be carried by Developer hereunder on condition that the insurance proceeds are
to be applied in the manner specified in this Lease and the Leasehold Mortgage
age shall so provide, except that the Leasehold Mortgage may provide a manner
for the disposition of such proceeds, if any, otherwise payable directly to
Developer.


             5.  ASSIGNMENT AND SUBLETTING:
                 -------------------------

                 5.1  Prohibition Against Change in Ownership, Management and
                      -------------------------------------------------------
Control. The qualifications and identities of Developer are of particular
- -------
concern to Landlord. It is because of those qualifications and identities that
Landlord has entered into this Lease with Developer. No voluntary or involuntary

                                      40
<PAGE>
 
successor in interest shall acquire any rights or powers under this Lease
except as expressly provided for in this Lease.

                 Except as otherwise permitted by this Section 5 and subsection
1.5.3, Developer shall not permit any significant change (voluntary or
involuntary) in the ownership, management or control of Developer to occur
unless such change is approved by Landlord, subject to the requirements of this
section and reasonable conditions imposed by Landlord.

                 Except as otherwise permitted by this Section 5 and subsection
1.5.3, Developer may not assign this Lease or any interest herein without first
obtaining the written consent of Landlord, pursuant to subsection 5.4 of this
Lease. Any assignee shall assume and agree to perform the obligations of
Developer under this Lease. Promptly following any permitted assignment,
Developer shall deliver to Landlord a copy of such assignment, together with a
statement setting forth the following information:

                      5.1.1  Name and Address for Notices.  The name and address
                             ----------------------------
           of the assignee for the purpose of enabling notices to be given.

                      5.1.2  Type of Entity.  Whether the assignee is an 
                             --------------
           individual, a corporation, a partnership or a joint venture, and if
           such assignee is a corporation, the names of such corporation's
           principal officers and of its directors and State of incorporation,
           and if such assignee is a partnership or joint venture, the names and
           addresses of the general partners of such partnership or venture.

                      5.1.3  Other Transfers.  In the event that
                             ---------------

                                      41
<PAGE>
 
           Developer is a partnership, joint venture or corporation, any
           assignment of twenty-five percent (25%) or more of the partnership or
           joint venture interest or outstanding capital stock of such an
           entity shall constitute an assignment by Developer of this Lease for
           the purposes of this Section 5 and shall not be permitted to occur
           without first obtaining the written consent of Landlord, which
           consent shall not unreasonably be withheld, delayed or conditioned.

                      5.1.4  Buildings or Land.  In addition to all other
                             -----------------
           assignments, which must be approved in advance by Landlord, any
           assignment of 50,000 square feet of land or office space must be
           approved in advance by Landlord.

                 5.2  Assignments Not Subject to Approval.  The provisions of 
                      ----------------------------------- 
this Section 5 shall not be applicable to the following types of assignments and
transfers, which shall be permitted without the prior consent of Landlord.

                      5.2.1  Death or Incapacity.  Assignments resulting from 
                             -------------------
           the death or mental or physical incapacity of an individual,
           provided, however, that any person replacing an individual who
           departs because of physical or mental disability shall have education
           and experience comparable to that of the person replaced.

                      5.2.2  Family Transfer.  A transfer or assignment for the
                             ---------------
           benefit of a spouse, children, grandchildren or other family members.

                      5.2.3  Affiliated Corporation.  A transfer to an 
                             ----------------------
           "Affiliated Corporation" as hereinafter defined.  An

                                      42
<PAGE>
 
           "Affiliated Corporation" shall be (i) any corporation which owns
           fifty-one percent (51%) or more of the outstanding capital stock of
           the assigning corporation; or (ii) any corporation, fifty-one percent
           (51%) or more of the outstanding capital stock of which is owned by
           the assigning corporation; or (iii) any corporation, fifty-one
           percent (51%) or more of the outstanding capital stock of which is
           owned by a shareholder or group of shareholders who also owns at
           least fifty-one percent (51%) of the outstanding capital stock of the
           assigning corporation.

                      5.2.4  IRS Transfer.  A transfer of stock resulting from 
                             ------------
           or in connection with a reorganization as contemplated by the
           provisions of the Internal Revenue Code of 1954, as amended, or
           otherwise, in which the ownership interests of a corporation are
           assigned directly or by operation of law to a person or persons, firm
           or corporation which acquires the control of the voting capital stock
           of such corporation or all or substantially all of the assets of such
           corporation.

                      5.2.5  Public Entity.  A transfer of stock in a publicly 
                             -------------
           held corporation or of the beneficial interest in any publicly held
           partnership or real estate investment trust.

                      5.2.6  Partner.  A transfer by a limited partner or joint 
                             -------
           venturer to a partnership or joint venture in which the assignor is
           a partner or venturer.

                                      43
<PAGE>
 
                      5.2.7  Comprising Entity.  A transfer or assignment from 
                             -----------------   
           one partner or joint venturer comprising Developer to another; or if
           Developer is a corporation, from one shareholder to another.

                 5.3  Assignment Invalid.  Any transfer or assignment to which
                      ------------------
Landlord's consent is required by subsection 5.1 shall be void and shall confer
no right to occupancy upon the assignee unless and until such consent of
Landlord is obtained. Such approval may be conditioned or refused in response to
the matters specified herein.

                 5.4  Approval of Assignments.  Landlord agrees that it shall 
                      -----------------------
consent to an assignment to a subtenant and to an assignee which, at the time of
such assignment, is of such financial standing and responsibility as to give
reasonable assurance that the payment of all Ground Rent and other amounts
reserved in this Lease will be made in compliance with all the terms, covenants,
provisions and conditions of this Lease. In requesting an approval by Landlord
of assignment pursuant to subsection 5.l, Developer shall provide the following
information to Landlord with respect to proposed assignments of 50,000 square
feet of rentable building area or land area, or more, of sublease space, with
respect to any Ground Sublease and with respect to assignments of a parcel or an
interest in this Ground Lease.

                      5.4.1  Name.  Name and address of the assignee.
                             ----

                      5.4.2  Description. Description of the Premises to be 
                             -----------
           assigned.

                      5.4.3  Nature of Business.  The nature of the business 
                             ------------------
           conducted by assignee on the Premises to be 

                                      44
<PAGE>
 
           assigned.

                      5.4.4  Financial Information.  Financial strength of the 
                             ---------------------
           subtenant or assignee (if the subtenant is a publicly held company, a
           copy of its most recent annual report; if the subtenant or assignee
           will not disclose financial information, a report from recognized
           credit rating agency, such as Dun & Bradstreet).

                      5.4.5  Officers.  The identity, background and experience
                             --------
           of all officers and directors of assignee, at executive vice
           president level and above and senior operational officer relating to
           the Premises, if a corporation or general partners of a partnership
           or sole proprietor of a proprietorship (Principals).

                      5.4.6  Additional Information.  To the extent known by 
                             ----------------------
           Developer, the following information:

                           5.4.6.1  Criminal record of the subtenant, assignee 
                 or any of the Principals.

                           5.4.6.2  Nature and extent of litigation to which the
                 subtenant, assignee or any Principal is a party.

                           5.4.6.3  Any course of conduct which a prudent person
                 would deem materially detrimental to the Project or to the
                 intended use of the Premises by the subtenant or assignee.

                      5.4.7  Informational Purposes.  For informational 
                             ----------------------
           purposes only:

                           5.4.7.1  Number of anticipated employees of the 
                 assignee.

                                      45
<PAGE>
 
                           5.4.7.2  At the time of submission of the request, 
                 the terms and conditions of the assignment.

                           5.4.7.3  With respect to all assignments a copy 
                 thereof after execution by all parties thereto.

                      5.4.8  Confidentiality.  If requested by Developer at the 
                             --------------- 
           time of submission of the information described above, Landlord shall
           keep such information and the identity of the proposed sublessee or
           assignee confidential and Landlord shall execute a confidentiality
           statement so providing to the extent Landlord is permitted by law to
           do so.

                      5.4.9  Disapproval by Landlord.  Landlord reserves the 
                             -----------------------
           right to reject any proposed assignee where the matters specified in
           5.4.3, 5.4.4, 5.4.5 or 5.4.6 above indicate that the presence of
           assignee would not be in the public interest or would adversely
           affect the financial viability of the Project. Landlord shall either
           approve or disapprove any proposed assignee within fifteen (15) days
           after receipt by Landlord of a request to do so. Failure of Landlord
           to act within said fifteen (15) days shall constitute approval. If
           Landlord does not approve any proposed assignee, Landlord shall state
           in writing the reasons for such disapproval. Developer shall have the
           right to challenge the validity of such disapproval. No damages shall
           be payable to Developer in any action arising from such disapproval
           unless Landlord shall have acted unreasonably or in bad faith or with
           actual malice.
                                      46
<PAGE>
 
           5.5  No Release.  Notwithstanding any assignment by Developer 
                ----------
permitted by subsection 5.1 with Landlord's consent, and notwithstanding any
assignment by a partner or joint venturer of Developer permitted by subsection
5.1.3 with Landlord's consent or made without Landlord's consent pursuant to
subsection 5.2, the assigning party shall remain fully liable for the
performance of all of the covenants to be performed by Developer under this
Lease prior to the effective date of such assignment or the "Completion Date",
as defined below, whichever last occurs, but shall be released from liability
with respect to the performance of such covenants to be performed after the last
to occur of such dates, Landlord's approval of or consent to any such assignment
or transfer shall not be a waiver of any right to object to further or future
assignments, and Landlord's consent to each such successive assignment must be
first obtained in writing from Landlord unless otherwise permitted by this Lease
without Landlord's prior consent. The term "Completion Date", as used herein,
shall mean the date that Developer completes the construction of the initial
building described in subsection 7.2 and a certificate of occupancy with respect
to such building has been obtained.

           5.6  Unauthorized Change.  This Lease may be terminated by the 
                ------------------- 
Landlord if there is any significant change (voluntary or involuntary) other
than those authorized in Section 5 or subsection 1.5.3 hereof, or not requiring
Landlord's approval of ownership, management or control of the Developer prior
to the completion of the development of the site, unless such changes have been
approved by the Landlord.

                                      47
<PAGE>
 
           5.7  Subletting.  Developer shall be entitled, with the prior written
                ----------
consent of Landlord, to sublet the whole or any portion of the Premises or the
improvements constructed thereon by or under Developer and, without limiting the
foregoing, may establish a leasehold condominium regime on the Premises, or
portions thereof, in accordance with the provisions of California law, including
California Civil Code Sections 783 and 1350-1360. Developer shall, at all times,
remain liable for the performance of all of the covenants on its part to be so
performed, notwithstanding any subletting. Each sublease shall be subject and
subordinate not only to this Lease, but also to any New Lease made by Landlord
as provided in Section 4.8 above. If the term of this Lease shall end while any
such sublease is in effect, Landlord may, at its option, for a period of ninety
(90) days thereafter, either terminate the said sublease or succeed to all of
the rights of Developer thereunder. Where any sublease which is consistent with
this Lease is approved, Landlord may grant to the subtenant, under such an
approved sublease entered into in good faith and for reasonable consideration, a
right of quiet enjoyment in recordable from (a "nondisturbance agreement")
during the term of the sublease, notwithstanding the expiration, termination or
cancellation of this Lease; provided that (i) the term of the sublease, plus
extension or renewal options, does not extend beyond the term of this Lease,
plus extension options; (ii) such subtenant agrees that in the event this Lease
expires, terminates or is cancelled during the term of the sublease, the
sublease shall be deemed a direct lease between Landlord and such subtenant and
the subtenant shall attorn to Landlord. In the

                                      48
<PAGE>
 
event that Landlord objects to any proposed nondisturbance agreement or
sublease, Landlord agrees to notify Developer in writing of such objection and
of its reasons for such objection within twenty (20) days of its receipt of the
proposed nondisturbance agreement and sublease. Subject to the foregoing
provisions of this subsection 5.7, Landlord hereby approves generally of the
form of nondisturbance agreement attached hereto as Exhibit "E". Any approvals
or grants of quiet enjoyment given or made by Landlord pursuant to this
subsection 5.7 shall be binding upon Landlord, its successors or assigns,
including without limitation any person or entity succeeding to the interest of
Landlord by way of judicial foreclosure or trustee sale proceedings pursuant to
any mortgage or deed of trust, the lien or charge of which is subject and
subordinate to this Lease.

           Any sublease, with respect to which Landlord agrees to execute a
nondisturbance agreement pursuant to this subsection 5.7, may be a sublease
pursuant to which the subtenant is responsible for the construction of the
building improvements upon the subleased premises (a "Ground Sublease" herein).
Any Ground Sub-lease may contain a hypothecation provision similar to Section 4
of this Lease for the benefit of the holder of any mortgage or deed of trust
constituting a lien on the subleasehold estate created by virtue of the Ground
Sublease. Any nondisturbance agreement executed and delivered by Landlord for
the benefit of the sublessee under a Ground Sublease shall specifically recite
that it is for the benefit of any such holder of a deed of trust or mortgage
constituting a lien on the subleasehold estate created by such Ground Sublease;
that the term "sublease" as used in

                                      49
<PAGE>
 
the nondisturbance agreement shall be deemed to include any new sublease
executed and delivered to any such holder of a first deed of trust or first
mortgage following a termination of the sublease pursuant to a provision in the
sublease similar to subsection 4.8 of this Lease, and that the term "sublessee"
under the nondisturbance agreement shall be deemed to include any encumbrances
or other party succeeding to the sublessee under the Ground Sublease by virtue
of judicial or private power of sale foreclosure proceedings or by delivery of
an assignment in lieu of foreclosure, or otherwise. Where Landlord agrees to
execute a nondisturbance agreement for the benefit of the sublessee under any
Ground Sublease, such agreement shall be subject to the obligations of the
sublessee thereunder being no less than the obligations of the Developer
hereunder with respect to the subleased premises.

                 5.7.1  Minor Subleases.  Consent of Landlord shall not be
                        --------------- 
           required to a sublease of any unit of space smaller than 50,000
           square feet, not including parking areas; however, notice of any such
           sublease shall be sent to Landlord's Airport Manager within ten (10)
           days of the execution of the sublease.

                 5.7.2  Consent to Sublease.  Prior to review of any proposed
                        -------------------
           sublease, the following information and assurances shall be provided
           to Landlord as part of the request for consent to proposed subleases
           of 50,000 square feet of rentable building area, or more, of sublease
           space, with respect to any Ground Sublease:

                      5.7.2.1  Description.  Description of
                               -----------

                                      50
<PAGE>
 
                 the sublease Premises.

                      5.7.2.2  Name. The name and address of the sublessee for 
                               ----
                 the purpose of enabling notices to be given under subsection
                 17.1 hereof.

                      5.7.2.3  Nature of Business.  The nature of the business 
                               ------------------
                 conducted on the sublease Premises.

                      5.7.2.4  Financial Information.  Financial strength of 
                               ---------------------
                 the subtenant or assignee (if the subtenant is a publicly held
                 company, a copy of its most recent annual report; if the
                 subtenant or assignee will not disclose financial information,
                 a report from a recognized credit rating agency, such as Dun &
                 Bradstreet).

                      5.7.2.5  Officers.  The identity, background and 
                               --------
                 experience of all officers and directors of sublessee, at
                 executive vice president level and above and senior operational
                 officer relating to the Premises, if sublessee is a
                 corporation, general partners of a partnership or sole
                 proprietor of a proprietorship (Principals).

                      5.7.2.6  Additional Information.  To the extent known by 
                               ----------------------
                 Developer, the following information:

                      5.7.2.6.1  Criminal record of the subtenant, assignee or
                   any of the Principals.

                      5.7.2.6.2  Nature and extent of litigation to which the
                   subtenant, assignee or any Principal is a party.

                                      51
<PAGE>
 
                      5.7.2.6.3  Any course of conduct which a prudent person
                 would deem materially detrimental to the Project or to the
                 intended use of the Premises by the subtenant or assignee.

                      5.7.2.7  Informational Purposes.  For informational 
                               ----------------------
           purposes only:

                      5.7.2.7.1  Number of anticipated employees of the 
                 subtenant or assignee.

                      5.7.2.7.2  At the time of submission of the request, the 
                 terms and conditions of the sublease or assignment.

                      5.7.2.7.3  With respect to all subleases and assignments 
                 a copy thereof after execution by all parties thereto.

                      5.7.2.7.4  Any proposed nondisturbance or attornment 
                 agreements.

                 5.7.3  Confidentiality.  If requested by Developer at the time 
                        ---------------
           of submission of the information described above, Landlord shall keep
           such information and the identity of the proposed sublessee or
           assignee confidential and Landlord shall execute a confidentiality
           statement so providing, to the extent Landlord is permitted by law to
           do so.

                 5.7.4  Disapproval by Landlord.  Landlord reserves the right 
                        -----------------------
           to reject any proposed sublessee where the matters specified in
           5.7.2.3, 5.7.2.4, 5.7.2.5 or 5.7.2.6 above indicate that the presence
           of sublessee would not be in the public interest or would adversely

                                      52
<PAGE>
 
           affect the financial viability of the Project. Landlord shall either
           approve or disapprove any proposed sublessee within fifteen (15) days
           after receipt by Landlord of a request to do so. Failure of Landlord
           to act within said fifteen (15) days shall constitute approval. If
           Landlord does not approve any proposed sublessee, it shall state in
           writing the reasons for such disapproval. Developer shall have the
           right to contest such disapproval. No damages shall be payable to
           Developer in any action challenging such disapproval unless Landlord
           shall have acted unreasonably, in bad faith or with actual malice.

               5.8  Sale of Buildings.  Developer shall have the right to sell
                    ----------------- 
buildings constructed pursuant to the terms of this Lease, provided, however,
that such buildings shall be and remain subject to the terms and conditions of
this Lease.  No sale of such buildings shall be valid unless this requirement is
expressly included in the deed as a covenant running with the land.


           6.  INDEMNITY, INSURANCE, CASUALTY DAMAGE:
               -------------------------------------

               6.1  Indemnification and Hold Harmless.  Developer expressly 
                    ---------------------------------
agrees to defend, protect, indemnify and hold harmless the Landlord, its
officers, agents and employees free and harmless from and against any and all
claims, demands, damages, expenses, losses or liability of any kind or nature
whatsoever which Landlord, its officers, agents or employees may sustain or
incur or which may be imposed upon them or any of them for injury to or death of
persons or damage to property arising out of or

                                      53
<PAGE>
 
resulting from the alleged acts or omissions of Developer, its officers, agents
or employees or in any manner connected with this Lease or with the occupancy,
use or misuse of the Premises by Developer, its officers, agents, employees,
subtenants, licensees, patrons or visitors.  Developer also agrees to defend at
its own cost, expense and risk all claims or legal actions that may be
instituted against Developer or Landlord with respect to the Premises, and the
design and construction of off-site improvements except traffic signals, and
Developer agrees to pay settlements and to satisfy any judgment that may be
rendered against either Developer or Landlord as a result of any injuries or
damages which are alleged to have resulted from or be connected with this Lease
or the occupancy or use of the Premises by Developer or its officers, agents,
employees, subtenants, licensees, patrons or visitors.  Nothing herein shall be
deemed to require Developer to indemnify Landlord for liability determined by a
court of law to have arisen from negligence of Landlord, provided, however, that
as between the parties to this Lease, in any matter in which the doctrine of
joint and several liability applies, Landlord shall not be required to pay any
larger share of such judgment than its actual contribution as determined by the
Court.

                 6.2  Insurance.
                      ---------

                      6.2.1  Liability Insurance.  At all times during the term 
                             -------------------
           of this Lease, Developer shall obtain and maintain or cause to be
           obtained and maintained bodily injury and property damage insurance
           by a combined single limit policy in an amount of at least Ten
           Million Dollars and No/l00 ($10,000,000.00) naming the

                                      54
<PAGE>
 
           Landlord and its officers, agents and employees as coinsureds with
           Developer and others designated by Developer. Developer shall also
           maintain workers' compensation insurance in the amount required by
           statute.

                 Prior to entry upon the Premises, and upon each insurance 
           renewal, Developer shall deliver the policies of insurance required
           by this subsection 6.2, or certified photostatic copies thereof, to
           the City of Long Beach Airport Manager for approval as to sufficiency
           and for approval as to form by the City Attorney. When said policies
           of insurance have been so approved, Developer shall substitute a
           certificate of insurance issued by the insurance company or companies
           issuing such policies certifying that said insurance coverage is in
           full force and effect and upon the filing of said certificate, the
           policies will be returned by Landlord to Developer, if Developer has
           deposited the original policies with Landlord. Said liability and
           property damage insurance policy shall contain a provision or
           endorsement substantially as follows:

               "The inclusion hereof of any person or entity as an insured shall
               not affect any right such person or entity would have as a
               claimant hereunder if not so included. This insurance shall be
               primary and not contributing with any other insurance maintained
               by Landlord."

                 Notwithstanding any other provision to the contrary contained
           in this Lease, Developer shall not

                                      55
<PAGE>
 
           have the right to enter upon the Premises for any purpose whatsoever
           until such certificate has been filed with the Landlord's Airport
           Manager.

                 6.2.2  Fire and Extended Coverage.  Developer shall, at no 
                        --------------------------
           cost or expense to Landlord, keep insured for the benefit of
           Developer and Landlord, and such other parties, having an insurable
           interest, as Developer may designate, the improvements constructed by
           or under Developer upon the Premises against loss or damage by fire
           and lightning and risks customarily covered by extended coverage
           endorsement, in amounts not less than one hundred percent (100%) of
           the actual replacement cost of said improvements, except that
           Developer, at Developer's option may exclude the cost of excavations,
           foundations and footings. Landlord shall be named as an insured under
           any such policy. Such fire and extended coverages shall also be
           required to be furnished by Developer during the construction of
           improvements on the Premises as contemplated by Section 7 below. Any
           loss payable under such insurance shall be payable to Developer,
           Landlord and such other parties having an insurable interest in the
           property as Developer may designate and may be endorsed with a
           standard mortgagee's loss payable endorsement in favor of the holder
           of any Leasehold Mortgagee holding a Leasehold Mortgage. Landlord
           will release the entire sum of the proceeds to Developer or to a
           lender for purposes of reconstruction, replacement or repair of any
           damaged improvement.

                                      56
<PAGE>
 
           The proceeds of such insurance shall be paid to Developer to the
           extent the amount of the recovery is for damages to interior, 
           non-structural or subtenant improvements, equipment, fixtures,
           personal property or for rental value insurance to the extent such
           recoveries are separate identifiable items. If Developer shall within
           five (5) years after such damage or destruction commence construction
           of the damaged or destroyed building, or a new building in accordance
           with Section 7 hereof, the proceeds of any insurance payable by
           reason of such damage or destruction shall be paid to Developer. If
           Developer shall fail to commence such construction within such five
           (5) year period Landlord reserves the right to receive such portion
           of the insurance proceeds so that Landlord may, if appropriate, carry
           out such reconstruction of the destroyed building, with all excess
           amounts to Developer. If at any time during the last five (5) years
           of the term of the Lease whether the original term or any extension
           thereof, a building then on the Premises shall be so damaged by fire
           or other casualty that the cost of restoration shall exceed fifty
           percent (50%) of the replacement value thereof, exclusive of
           foundations, immediately prior to such damage, either party hereto
           may, within sixty (60) days of such damage, give notice of its
           election to terminate this Lease with respect to the parcel upon
           which the building is located and, subject to further provisions of
           this subsection this

                                      57
<PAGE>
 
           Lease shall cease and come to an end on the date of the expiration of
           ten (10) days from the delivery of such notice with the same force
           and effect as if such date were the date herein fixed for the
           expiration of the term hereof, and the Ground Rent shall be
           apportioned and paid to the date of such termination. In such event
           Developer shall remove all debris and level the land, and Developer
           shall have no obligation to repair or rebuild or restore. The
           insurance proceeds shall then be divided as follows:

                 If five (5) years remain before the end of the Lease or any 
           extension thereof, Developer shall receive seventy-five percent (75%)
           of the proceeds, and Landlord shall receive twenty-five percent
           (25%); if four (4) years remain before the end of the Lease,
           Developer shall receive fifty percent (50%) of the proceeds, and
           Landlord shall receive fifty percent (50%); if three (3) years remain
           before the end of the Lease, Developer shall receive twenty-five
           percent (25%) of the proceeds, and Landlord shall receive 
           seventy-five percent (75%); if two (2) years remain before the end of
           the Lease, Developer shall receive ten percent (10%) of the proceeds,
           and Landlord shall receive ninety percent (90%); if one (1) year
           remains before the end of the Lease, Landlord shall receive the
           entire proceeds.

                 6.2.3  Aviation Facilities.  Insurance for any aviation 
                        -------------------
           facility developed pursuant to this Lease shall include all of the
           types and amounts specified

                                      58
<PAGE>
 
           herein to the extent such coverages are applicable to operations
           performed. Depending upon the nature of the physical improvements
           made upon and the use of the Premises, aviation insurance coverages
           shall be maintained, to the extent such coverages are applicable, as
           follows: Hangar Liability, Hangar Keeper's Legal Liability; Airport
           Legal Liability, Hangar Material Damage Coverage. To the extent any
           of the above liability coverages are required, said policies shall be
           maintained with a combined single limit in the amount of at least Ten
           Million and No/l00 Dollars ($10,000,000.00).

                 6.2.4  Miscellaneous.  The insurance policies to be secured by 
                        -------------
           Developer pursuant to this subsection 6.2 shall be obtained from
           insurers having a rating in Best's Insurance Guide of A-10, or better
           (or a comparable rating in any similar Guide, if Best's Guide is no
           longer published or if Best's rating system changes), and shall
           require that the insurer give Landlord notice of any modification,
           termination or cancellation of any policy of insurance no less than
           thirty (30) days prior to the effective date of such modification,
           termination or cancellation. In addition, Developer shall notify
           Landlord of any modification, termination or cancellation of any
           policy of insurance secured by Developer pursuant to this subsection
           6.2 as soon as Developer learns of any such modification, termination
           or cancellation. The policy of public liability and

                                      59
<PAGE>
 
           property damage insurance to be obtained under subsection 6.2.1 above
           shall stipulate that said policy provides primary coverage and is not
           subordinate to nor contributing with any other insurance coverage
           held or maintained by Landlord. The procuring of any such policy of
           insurance shall not be construed to be a limitation upon Developer's
           liability or its full performance on Developer's part of the
           indemnification and hold harmless provisions of this Lease; and
           Developer understands and agrees that notwithstanding any such policy
           of insurance, Developer's obligation to protect, indemnify and hold
           harmless Landlord under this Lease is for the full and total amount
           of any damage, injuries, loss, expense, costs or liabilities caused
           by or in any manner connected with or attributed to the acts or
           omission of Developer, its officers, agents, employees, licensees,
           patrons or visitors, or the operations conducted by Developer, or
           Developer's use or misuse of the Premises, except to the extent
           resulting from the negligent or willful acts of Landlord or any such
           indemnitee.

                 6.2.5  Blanket Policies.  Nothing contained in this section 
                        ----------------
           shall prevent Developer from requiring its subtenants, or any of
           them, or any other third party, to provide the insurance required by
           this Section 6, nor prevent Developer, or any of its subtenants, or
           any such third party from taking out insurance of the kind provided
           for under this section under a blanket insur-

                                      60
<PAGE>
 
           ance policy or policies which cover other personal and real property
           owned or operated by Developer or any subtenant provided that the
           protection afforded Landlord and Developer under any policy of
           blanket insurance hereunder shall be no less than that which would
           have been afforded under a separate policy or policies relating only
           to the Premises.

                 6.2.6  Self-Insurance.  If a subtenant is self-insured as a 
                        --------------
           matter of such subtenant's usual and customary business policy and
           such self-insurance is accepted by institutional lenders, Developer
           may request Landlord to waive the insurance requirement and to
           consent and permit such subtenant to self-insure. Such request shall
           be accompanied by information deemed necessary by Landlord to review
           the request. Consent to self-insure shall not be unreasonably
           withheld if the conditions specified in this section have been met.

                 6.2.7  Insurance Adjustments.  The amounts of insurance 
                        ---------------------
           specified in subsections 6.2.1 and 6.2.3 may be adjusted in the year
           2000 and not more often then every third year thereafter for the
           duration of the Lease to take into account circumstances at the time
           of such adjustments.

             6.3 Damage or Destruction.
                 ---------------------

                 6.3.1  Restoration of Premises.  If any building or 
                        ----------------------- 
           improvement on the Premises is totally or partially destroyed or
           damaged as a result of any casualty, Developer shall promptly repair,
           replace or rebuild

                                      61
<PAGE>
 
           such building or other improvement at least to the extent of its
           value immediately prior to such occurrence, subject, however, to
           delays resulting from force majeure, the cancellation of existing
           leases due to such casualty, settling with insurers and/or
           negotiating new financing if necessary. If less than twenty (20)
           years remain of the term of this Lease or any extension thereof,
           Developer may remove all damaged or destroyed improvements and place
           the portions of the Premises from which improvements are removed in a
           clean and level condition following which all insurance proceeds
           attributable to such destruction or damage shall be the property of
           Developer. After the commencement of such repair, replacement or
           rebuilding, Developer shall continue such work with reasonable
           diligence until completion. Developer may cause any such work to be
           performed by or under its subtenants. In no event shall Landlord be
           liable to Developer for any damages resulting to Developer from the
           happening of any such fire or other casualty or from the repair or
           reconstruction of the Premises or from the termination of this Lease
           as provided in subsection 6.3.2 below.

                 6.3.2  Right to Terminate.  Notwithstanding the provisions of
                        ------------------
           subsection 6.3.1 above, if the buildings and improvements on the
           Premises shall be damaged or destroyed as a result of a hazard
           against which Developer is not required to carry insurance to an
           extent in excess of fifty percent (50%), or more, of

                                      62
<PAGE>
 
           their then insurable value, or if such damage or destruction shall
           occur during the last ten (10) years of the term of this Lease or
           during the last ten (10) years of any extended term of this Lease,
           then Developer shall have the right to elect not to repair, replace
           or rebuild such casualty damage and to cancel this Lease by giving
           written notice thereof to Landlord within three hundred sixty-five
           (365) days after the date of any such damage or destruction. Upon
           such termination, it will be the obligation of Developer to remove
           all damaged or destroyed improvements and to place the portions of
           the Premises from which improvements are removed in a clean and level
           condition.

                 6.3.3.  No Reduction in Rent.  In case of destruction, there
                         -------------------- 
           shall be no abatement or reduction of rent.


           7.  DEVELOPMENT OF THE PROJECT:
               --------------------------

               7.1  Scope of Development.  The Project will be an aviation 
                    --------------------
oriented business, office, research and development and industrial park. It is
agreed by the parties that the Project will be built to include when fully
developed, at least 665,500 square feet of building area in one (1) or more
buildings per parcel, no one of which shall exceed the height limits established
by Federal Aviation Regulations (FAR). However, it is recognized that the scope
of development may be changed, enlarged or redistributed to meet a subtenant's
or user's needs or changed conditions. The facade treatment, landscaping and
character of the

                                      63
<PAGE>
 
development will be substantially as proposed in the Long Beach Airport Center
submittal of December 7, 1983, as supplemented by a spiral bound document
entitled "Supplement to Kilroy Industries' December 7, 1983, Proposal", and
included therein is a transmittal letter from Kilroy Industries to the City of
Long Beach, dated January 12, 1984, ("Developer's Long Beach Airport Center
Submittal") on file in the offices of Landlord's Director of Community
Development, or the equivalent of the submitted proposal if approved by Landlord
pursuant to subsection 7.3 hereof.

               Three (3) acres of the site must be made available for aircraft
use if a reasonable demand for same is expressed by the subtenants of the site.
The three (3) acre allocation need not be restricted to any designated section
of the site and can change in configuration and location depending on the needs
of the remainder of the parcel and changes in subtenant requirements. The three
(3) acres at any time designated for aircraft use may be used for other purposes
consistent with the Lease and the PD-2 zoning, such as motor vehicle parking and
trucking, as approved by Landlord's Airport Manager, prior to any actual demand
from tenants of the site for aircraft storage. The precise amount up to three
(3) acres, configuration and location of improvements shall be based on and
consistent with the PD-2 zoning ordinance to be adopted, and any amendment or
replacement thereof.

               7.2  Developer's Obligation to Develop Premises.  Developer 
                    ------------------------------------------
agrees to commence the construction of improvements upon the Premises, 
including the first building, on or before September 1, 1985, subject to
granting of all required governmental approvals and subject to subsection 17.3.
After completion of

                                      64
<PAGE>
 
the initial building, Developer shall use its best efforts to undertake as
expeditiously and fully as is reasonably possible in the exercise of sound
business judgment, the planning and construction of improvements upon Premises
and to further the interest thereof to the end that there will be ultimately
constructed on the Premises the development contemplated in the Basic Concept
Documents or its alternative as approved by Landlord pursuant to subsection
7.3.7. Developer intends to conform to the construction schedule attached as
Exhibit "J" entitled "Construction Schedule" but is not required to do so,
except as provided in this subsection.

               In the event Developer has not commenced construction on the last
parcel by January 1, 1993, then the fair market rental value of said parcel
shall be adjusted in the manner set forth in subsection 3.2, as of January,
1993, upon the assumption that the building or buildings planned for
construction upon said parcel had, in fact, been completed.

                      7.2.1  Best Efforts to Sublease.  Developer shall at all 
                             ------------------------
           times use its best efforts to expedite to the fullest extent
           consistent with the exercise of sound business the making and
           entering into of subleases with subtenants upon terms and conditions
           satisfactory to subtenants and not inconsistent with any of the
           requirements of this Lease.

                 7.3  Architectural Approval.
                      ----------------------

                      7.3.1  Restriction.  No buildings or other improvements, 
                             -----------
           including without limitation, grading, street, landscaping and
           parking area improvements shall

                                      65
<PAGE>
 
           be constructed or maintained upon the Premises unless the same
           conform to and are consistent with the zoning for the site, building
           code requirements and other adopted construction standards for public
           improvements of the City of Long Beach and the scope of the Project,
           as defined in subsection 7.1 above, and are approved by Landlord as
           provided in subsection 7.3.7 below.

                  7.3.2  Basic Concept Documents.  Landlord has heretofore 
                         -----------------------
           approved certain documents, including a site development plan, which
           documents are more particularly described in subsection 7.1. Said
           documents, as the same may from time to time be modified and/or
           supplemented with the approval of Landlord pursuant to subsection
           7.3.7 below are herein referred to as the "Basic Concept Documents".
           To the extent that said documents refer to land included in the
           Adjacent Properties shown on Exhibit "B", additional approval is
           required as provided in subsection 1.4.1.

                  7.3.3  Landscaping.  Prior to the construction of any 
                         -----------
           landscaping upon the Premises, Developer shall prepare and submit 
           to Landlord for Landlord's approval pursuant to subsection 7.3.7
           below preliminary landscape plans for such work. Following Landlord's
           approval of Developer's preliminary landscape plans for such work 
           and prior to the commencement of such work, Developer shall prepare
           and submit to Landlord for Landlord's approval pursuant to subsection
           7.3.7 below final landscape plans for such work. Said landscape 
           plans need

                                      66
<PAGE>
 
           not include landscaping between building walls and adjacent curbs
           and/or parking areas, it being understood that preliminary and final
           plans for such landscaping may be submitted separately by Developer
           to Landlord for Landlord's approval under subsection 7.3.7 below when
           the requirements of building occupants have been ascertained. Said
           landscape plans shall be consistent with the Basic Concept Documents
           and/or modifications or amendments thereto from time to time approved
           by Landlord. The landscaping plans, if any, itemized on the attached
           Exhibit "G" have been approved in concept by Landlord for purposes of
           this Lease and for no other purposes. In general, Developer shall be
           permitted freedom of selection of landscaping plants, trees and other
           materials consistent with the Basic Concept Documents and the
           provisions of subsection 3.6.

                      7.3.4  Exterior Elevations.  Prior to the construction of 
                             -------------------
           any building improvements upon the Premises, Developer shall prepare
           and submit to Landlord for Landlord's approval pursuant to subsection
           7.3.7 below exterior elevations for such building improvements. Such
           exterior elevations need not include exterior building signs. The
           exterior elevations, if any, itemized on the attached Exhibit "H"
           have been approved in concept by Landlord for purposes of this Lease
           and for no other purposes.

                      7.3.5  Security and Security Plans.  Prior to taking 
                             ---------------------------  
           possession of the Premises, Developer shall sub-

                                      67
<PAGE>
 
           mit to the Landlord for approval a site security plan both for the
           construction period and for the Project as partially and fully
           developed which shall comply with applicable Federal Aviation
           Regulations and the requirements of the Airport Manager. During
           construction, Developer shall maintain in place at all times a site
           security fence. Developer shall comply with FAR Part 107 regarding
           Airport Security and FAR Part 77 regarding height limitations. It is
           particularly important that Developer notify the Airport Manager and
           such other persons as he may direct twenty-four (24) hours in advance
           of erecting cranes on the Premises for any purpose. Developer shall
           pay any fine or penalty imposed on Landlord as a result of security
           violations on the Premises. Developer shall have the right to contest
           such fine or penalty.

                      7.3.6  Amendments.  Developer may from time to time submit
                             ----------
           to Landlord for Landlord's approval pursuant to subsection 7.3.7
           below modifications and/or amendments to any of the items described
           in subsections 7.3.3 through 7.3.5 above theretofore approved by
           Landlord.

                      7.3.7  Landlord Approval.  Developer shall submit all 
                             -----------------
           plans required by subsections 7.3 and 3.7 to Landlord, attention
           Director of Community Development, who shall coordinate the review
           and approval of such plans with the Airport Manager. Landlord shall
           either approve or disapprove of any item submitted for approval

                                      68
<PAGE>
 
           to Landlord by Developer pursuant to subsections 7.3.3 through 7.3.6
           above and subsection 3.7 within fifteen (15) days of Landlord's
           receipt thereof by giving written notice of such approval or
           disapproval to Developer. Any such disapproval shall state in writing
           the reasons for disapproval. Failure by Landlord to expressly so
           disapprove of any such item within such fifteen (15) day period shall
           constitute Landlord's approval of such item.

                 The criteria to be used by Landlord in approving or
           disapproving any such item shall be (i) compliance with the Basic
           Concept Documents and PD-2 zoning, (ii) exterior aesthetics, (iii)
           consistency with prior improvement on the Premises, (iv) relationship
           of improvements to adjacent land, including public rights-of-way, 
           (v) the general function of the spaces within the Project between
           building areas and adjacent public rights-of-way, consistent with
           overall project design. In general, Developer shall be permitted
           freedom of design of all exteriors.

                 In the event Landlord disapproves of any such item, Developer
           may cause such item to be appropriately revised and resubmit the same
           to Landlord for approval pursuant to this subsection 7.3.7. Landlord
           and Developer agree to cooperate reasonably each with the other in
           resolving any objections of the other to such item and/or requested
           modifications by the other party.

                 The provisions of this section with respect

                                      69
<PAGE>
 
           to notice, time for and method of approval shall apply to any such
           revised item resubmitted to Landlord for approval. Upon the approval
           of any such item, Landlord shall execute and return a copy of such
           item to Developer marked approved by Landlord with the date of such
           approval.

                 Any item to be approved or disapproved by Landlord shall be
           deemed to have been submitted to and received by Landlord on the date
           such item is delivered to or received at the office of the Director
           of Community Development of Landlord.

                 7.3.8  Communication and Consultation. Landlord and Developer 
                        ------------------------------
           agree to communicate and consult informally as frequently as is
           necessary to insure that the formal submittal of any item pursuant to
           this section can receive prompt and speedy consideration. In
           addition, during the period that Developer is preparing drawings and
           specifications for buildings and other improvements to the Premises,
           Landlord agrees, upon request of Developer, to schedule and hold
           regular progress meetings in order to coordinate the compliance of
           such drawings and specifications with the construction requirements
           of this Lease.

                 7.3.9  Requirements of Institutional Lender or Major Occupant.
                        ------------------------------------------------------
           If any revisions or corrections of drawings and specifications,
           landscape and grading plans and/or site plans consistent with the
           items heretofore approved by Landlord or approved by Landlord
           pursuant

                                      70
<PAGE>
 
           to this section are required by any institutional lender providing or
           proposing to provide financing to Developer or major occupant or
           proposed major occupant for a building, Developer and Landlord shall
           cooperate with each other in efforts to obtain the waiver of such
           requirements or to develop a mutually acceptable alternative. A major
           occupant shall be deemed a person or entity occupying or proposed to
           occupy all of a freestanding building or in excess of 50,000 square
           feet of building floor area upon initial occupancy. If no such waiver
           is obtained and no such alternative is developed, Landlord shall
           amend the items so approved by Landlord pursuant to this section as
           may reasonably be required for consistency with such revisions or
           corrections. Any amendment of items approved by the Landlord does not
           constitute a waiver of other legal, governmental approvals.

                 7.3.10  Interior Improvements.  During the term hereof, 
                         ---------------------
           Developer shall have the right to make, at no expense to Landlord,
           interior improvements to any building, and thereafter to make
           changes, alterations, further improvements and additions in and to
           the interior of any building as Developer may desire, subject to all
           applicable codes, ordinances and statutes.

                 7.3.11  Modification of Plans.  Developer may make changes and
                         ---------------------
           modifications to plans and specifications for buildings which are not
           material or to resolve an inconsistency or ambiguity without
           obtaining Land-

                                      71
<PAGE>
 
           lord's prior approval. Landlord agrees that Developer may cause the
           plans for any building to be modified to the extent required to adapt
           the same to soil or other conditions found on the Premises and to the
           extent modification thereof is required by any governmental agencies
           or authorities having jurisdiction to approve such plans, all without
           resubmitting the same to Landlord for Landlord's reapproval.

                 7.4  Performance and Payment Bonds.
                      -----------------------------
                      7.4.1  Agreement to Provide.  On or before the date of
                             --------------------
           commencement of construction of any building, structure or other
           improvements on the Premises having an estimated cost of One Million
           and No/l00 Dollars ($1,000,000.00) or greater, Developer shall file
           or cause to be filed with Landlord a performance-bond and labor 
           and material payment bond executed by Developer or Developer's
           contractor or subtenant, as principal, and by a surety authorized 
           to do business in the State of California, as surety, conditioned
           upon the contractor's performance of its construction contract with
           Developer and payment to all claimants for labor and materials used
           or reasonably required for use in the performance of such contract,
           in a form and with a surety reasonably acceptable to Landlord. Forms
           of bond which generally are acceptable hereunder are attached 
           hereto and marked Exhibit "I". Said bond shall name or be endorsed 
           to name Landlord as a joint obligee with Developer and/or Developer
           and Developer's

                                      72
<PAGE>
 
           lender. Landlord agrees to either approve or disapprove of any such
           proposed bond submitted to Landlord for approval within ten (10) days
           of Landlord's receipt thereof. Any notice of disapproval shall
           specify the reasons for disapproval and the modifications required to
           secure Landlord's approval. Landlord's failure to expressly so
           disapprove of any such bond within said ten (10) day period shall
           constitute Landlord's approval of the form of such bond and of the
           surety issuing such bond.

                      7.4.2  Term of the Bond.  The term of both bonds shall 
                             ----------------
           commence on or before the date of filing with Landlord. The
           Performance Bond shall remain in effect until the date of completion
           of the work to the reasonable satisfaction of Landlord's City Manager
           or his designee. The Payment Bond shall remain in effect until the
           expiration of the period of filing a claim of lien as provided in
           Title 15 of Part 4 of the California Civil Code, and as hereafter
           amended, or if a claim of lien is filed, the expiration of the period
           for filing an action to foreclose such lien, or until the Premises
           are freed from the effect of such claim of lien and any action
           brought to foreclose such lien pursuant to the provisions of said
           Title 15 of Part 4 or the lien is otherwise discharged.

                      7.4.3  Penal Sum.  The Performance Bond shall be in the 
                             ---------
           amount and provide a penalty of one hundred percent (100%) of the
           cost of the improvements to be

                                      73
<PAGE>
 
           constructed as such cost shall be determined by the Developer. The
           Payment Bond shall be in the amount and provide a penalty of one
           hundred percent (100%) of the valuation of the improvements to be
           constructed.

                      7.4.4  Alternative Performance.  In lieu of the 
                             -----------------------
           Performance Bond and Payment Bond required by this subsection 7.4,
           Developer may furnish cash, assignment of account, or a time
           certificate of deposit or irrevocable letter of credit conditioned
           only on the terms of this Lease or such other form of security as may
           be agreed upon by the parties.

                 7.5  Construction.
                      ------------

                      7.5.1  Costs of Construction.  Except as provided in 
                             ---------------------
           subsections 3.8, 3.9, 3.11 and 7.5.10, the entire cost and expense of
           constructing any and all improvements on the Premises, including
           without limitation any and all on and off-site improvements required
           by applicable governmental authorities under applicable zoning
           ordinances or as a condition to parcel or final map approvals, shall
           be borne and paid by Developer, or its subtenants, and Developer
           shall hold and save Landlord and the Premises harmless from any
           liability whatsoever on account thereof.

                      7.5.2  Right to Improve.  Developer shall have the right 
                             ----------------
           to construct buildings and other improvements upon the Premises and
           shall have the right to change the grade of the Premises and to
           perform all off-site work included within the scope and intent of the
           Basic

                                      74
<PAGE>
 
           Concept Documents and/or to demolish and remove any and all
           structures, foliage and trees situated upon the Premises as of the
           date of this Lease as may reasonably be required for the purpose of
           improving the same incidental to Developer's or a subtenant's use of
           the Premises; provided, that such work shall be performed in
           accordance with the applicable requirements of this Section 7, and
           such laws of any governmental entity as may be applicable thereto and
           that arrangements for access to adjacent leaseholds are completed
           prior to commencement of work on those areas. Any and all
           improvements, constructed by or for the Developer, except off-site
           improvements, shall be owned by Developer and its successors or
           assigns during the term of this Lease and, unless removed by
           Developer upon the expiration of the term of this Lease as permitted
           by subsection 17.10 below, shall become a part of the realty and the
           absolute property of Landlord upon the expiration or earlier
           termination of the term of this Lease.

                      7.5.3  Governmental Permits.  Before commencement of 
                             --------------------
           construction or development of any buildings, structures, or other
           work or improvements upon the Premises or within the Project area,
           Developer shall, at its own expense with the cooperation of Landlord,
           secure or cause to be secured any and all permits which may be
           required by the City of Long Beach or any other governmental agency
           having authority over such construction, development or work.
           Developer shall provide a
<PAGE>
 
           copy of each such permit to the Landlord prior to commencing the
           subject work or activity.

                      7.5.4  Rights of Access.  For the purposes of assuring 
                             ----------------
           compliance with this Lease, representatives of Landlord in addition
           to those conducting inspections required by Landlord, shall have the
           right of access to the Premises without charges or fees, at normal
           construction hours, during the period of construction for the
           purposes of this Lease, including but not limited to the inspection
           of the work being performed in constructing the improvements required
           by this Lease. Such representatives of Landlord shall be those who
           are so identified in writing by the Director of Community Development
           of Landlord, except that those employees of the City of Long Beach
           conducting inspections required by law need not be so identified.

                      7.5.5  Local, State and Federal Laws.  Developer shall 
                             -----------------------------
           carry out or cause to be carried out the construction of any
           buildings, structures or other work or improvements upon the Premises
           in conformity with all applicable laws. Any buildings, structures or
           other improvements constructed or placed upon the Premises by or
           under Developer, shall be constructed or placed in accordance with
           the laws and regulations of the State of California and of the City
           of Long Beach applicable to the Premises. Any applicable Federal
           Aviation Regulation (FAR) shall also be complied with.

                                      76
<PAGE>
 
                      7.5.6  Antidiscrimination During Construction.  Developer 
                             --------------------------------------
           for itself and its successors and assigns agrees agrees that in the
           construction of any improvements provided for in this Lease, that
           Developer will not discriminate against any employee, or applicant
           for employment because of age, sex, marital status, race, handicaps,
           color, religion, creed, ancestry or national origin.

                      7.5.7  Responsibilities of Landlord.
                             ----------------------------

                           7.5.7.1  Governmental Approvals.  Landlord will 
                                    ----------------------
                 assist and cooperate with Developer in connection with requests
                 by Developer for lot line adjustments, tentative or final,
                 parcel, tract or subdivision map approval, condominium plan
                 approval, variances and any other governmental approvals
                 necessary for or which will facilitate the development of the
                 Premises, pursuant to this Lease including, without limitation,
                 the execution of documents required to dedicate or offer for
                 dedication or restrict or otherwise encumber or subdivide by
                 parcel or final maps or condominium plans portions of the
                 Premises as may be required by applicable governmental
                 authorities.

                           7.5.7.2  Easements.  Landlord agrees to join in 
                                    ---------
                 granting or dedicating such public or private utility company
                 easements as may be required for the development of the
                 Premises, for which no consideration is given. With the
                 exception of

                                      77
<PAGE>
 
                 landscaping and appurtenant structures as provided in
                 subsection 7.5.9, Developer shall have no responsibility for
                 maintaining public rights-of-way, sewers, storm drains and
                 other facilities after dedication of same to Landlord by
                 Developer, and Landlord agrees to accept the same for
                 maintenance purposes.

                           7.5.7.3  Off-Site Improvements.  Subject to any 
                                    ---------------------
                 limitation of law, Landlord shall take all such action as is
                 necessary and prudent in order to permit Developer to install
                 and construct the off-site improvements which are necessary to
                 initially make the Premises suitable for development according
                 to Developer's Basic Concept Documents. The nature of such
                 actions by Landlord and the nature and extent of such off-site
                 improvements are defined in the attached Exhibit "F" ("Off-site
                 Improvements"). The costs of all rights-of-way and improvements
                 described in Exhibit "F" shall be included in Predevelopment
                 and Infrastructure Costs in the manner set out in subsections
                 3.6 through 3.11.

                           7.5.7.4  Bond Financing.  Landlord further agrees to 
                                    --------------
                 assist with Developer's financing of the development of the
                 Premises by cooperating reasonably with Developer and using
                 reasonable efforts to sell or to cause any appropriate agency
                 of the City of Long Beach to sell industrial

                                      78
<PAGE>
 
           development bonds as a source for such financing, if such action is
           legally permissible; by granting to or for the benefit of the holders
           of any special assessment or district bonds constituting a first lien
           on Developer's Leasehold Estate, or their trustee, rights and
           remedies of a similar nature afforded Leasehold Mortgagees under
           Section 4 hereof.

                 7.5.8 Responsibilities of Developer. Developer, without expense
                       ----------------------------- 
     to Landlord, shall perform all work specified of Developer in this Lease.
     In addition, Developer shall furnish Landlord's Director of Community
     Development with semi-annual progress reports demonstrating good faith
     compliance with the construction requirements of this Lease on or before
     each semi-annual period commencing with the sixth month anniversary of the
     date of this Lease, through the occurrence of the completion date of such
     construction.

                 7.5.9 Maintenance. In addition to the responsibilities
                       -----------
     mentioned herein, Developer shall have sole and exclusive responsibility
     for maintaining the Premises and all building structures and improvements
     which may be constructed upon the Premises in good condition and repair, at
     no cost or expense to Landlord, reasonable wear and tear excepted.
     Developer shall also maintain all landscaping and appurtenant structures
     installed in accordance with plans approved pursuant to Section 7. Landlord
     will consider a request

                                      79
<PAGE>
 
     to maintain landscaping in public rights-of-way.

                 7.5.10  Acceptance of Premises.  Developer accepts the
                         ----------------------
     Premises in an "as-is" condition, except for subsurface hazardous
     materials and munitions, which are the responsibility of Landlord to remove
     at Landlord's expense, and also except for subsurface conditions under
     existing leased premises demised to Tommie E. Rutherford dba Stripbright
     Company, and acknowledges that Developer has not received and Landlord has
     not made any warranty, express or implied, as to the condition of the
     Premises. Developer agrees to bear all expenses incurred in the
     development, operation and maintenance of the Premises, except for
     improvements and facilities dedicated for public use to Landlord or other
     governmental authority, and except for removal and disposition of
     subsurface hazardous materials and munitions.

                 7.6 Subdivided Leases.  For the purpose of facilitating the
                     -----------------
development of the Project and obtaining financing and refinancing of
improvements to be constructed thereon, at any time and from time to time during
the term, within thirty (30) days after notice of demand from Developer,
Landlord shall enter into separate new leases ("Subdivided Lease") so that there
shall be one lease for each developable parcel in the Premises. The Subdivided
Leases described herein shall be for the sole purpose of lease, sale or
financing of the development. In all matters affecting the relationship, rights
or obligations of the parties hereto, or in the case of any inconsistency
between

                                      80
<PAGE>
 
the language of the documents, this Lease as undivided and unmodified shall
govern except that as to the individual subdivided lease parcels, rents,
security deposits, legal descriptions and requirements governing amount and
level of construction may be varied to conform to the specifics of such parcel,
as long as the totals in all such categories for all subdivided leases added
together correspond to the totals expressed in this document. Developer shall
pay to Landlord as a separate charge apart from rents a one time charge, payable
in advance to reimburse Landlord's costs and expenses in separating the leases
and reviewing and administering all the leases as separated in the sum of Five
Thousand Dollars ($5,000.00).  Each Subdivided Lease shall:

                 7.6.1  Same Parties.  Have the same parties as the parties to
                        ------------
           this Lease.

                 7.6.2  Obligations of Subdivided Leases. Be released from the
                        --------------------------------
           overall obligations expressed in this Lease to pay rent and to carry
           out specific levels of construction within specific periods,
           provided, however that each such parcel shall be subject to an
           appropriate proportionate share of such obligations such that the
           total of such obligations divided among separated leases is not less
           than the total of such obligations expressed in this Lease. All other
           obligations imposed by this Lease shall apply to each such separate
           parcel as an undivided shared obligation. As to any conflict between
           the Subdivided Leases or all of them and this Lease, the terms of
           this Lease shall govern.

                 7.6.3  Terms, Covenants.  Contain the same
                        ----------------
                                      81
<PAGE>
 
           terms, covenants, provisions, conditions and agreements as those
           contained in this Lease except that:

                 7.6.3.1 Ground Rent. The Ground Rent and other periodic
                         -----------
           payments to be made by Developer as part of Developer's obligation
           under this Lease and the security deposit under subsection 16.1
           shall, under the Subdivided Lease, bear substantially the same
           proportion to amounts provided in this Lease as the area of the
           Premises in the Subdivided Lease bears to the area of the Premises in
           this Lease. Provided, however, that if the fair market value of any
           land included in a Subdivided Lease is substantially greater or less
           than the balance of the land included in this Lease, then the Ground
           Rent may be appropriately varied between the Subdivided Lease and
           this Lease in order to take into account such variance in the fair
           market land value.

                 7.6.3.2 Improvements. Any improvements constructed upon the
                         ------------
           Premises demised by a Subdivided Lease shall satisfy Developer's
           obligations imposed by this Lease. The right of Developer to make
           improvements shall be apportioned around the Subdivided Leases
           substantially as is provided in subsection 7.6.3.1.

                 7.6.3.3 Easements and CC & R's. Each Subdivided Lease shall
                         ----------------------
           contain all cross-easements, covenants, conditions, restrictions and
           agreements requested by Developer, and approved by Landlord,

                                      82
<PAGE>
 
           provided they reasonably facilitate separating this Lease into
           individual Subdivided Leases within the overall intent of this Lease.

                 7.6.3.4 Description of Property. Each Subdivided Lease shall
                         -----------------------
           cover only that portion of the Premises specified by Developer in
           Developer's notice of demand, provided that Developer shall accompany
           each notice of demand with an accurate survey and metes and bounds
           description of the portion of the Premises to be covered by the
           Subdivided Lease; or if the Premises have been divided into separate
           parcels, with the appropriate parcel map description of such
           Premises.

                 7.6.3.5 Excluded Matters. Obligations under this Lease which
                         ----------------
           have been satisfied or which are not applicable shall be excluded
           from a Subdivided Lease.

           7.7 Combining Leases.  At any time and from time to time after the
               ---------------- 
execution of any such Subdivided Lease, within thirty (30) days after notice of
demand from Developer, Landlord shall enter into a single lease ("Single Lease")
combining any two or more of the Subdivided Leases, covering all the portions of
the Premises covered by the component Subdivided Leases, and containing the same
terms, covenants, provisions, conditions and agreements as those contained in
the component Subdivided Leases, except that:

               7.7.1 Ground Rent. The Ground Rent and other periodic payments to
                     -----------
     be made by Developer as part of

                                      83
<PAGE>
 
     Developer's obligation under the Single Lease shall be the sum of the
     Ground Rent and other periodic payments payable under the component
     Subdivided Leases;

               7.7.2  Easements and CC & R's.  The Single Lease shall
                      ---------------------- 
     contain all cross easements, covenants, conditions, restrictions and
     agreements requested by Developer and approved by Landlord provided they
     reasonably facilitate combining the component Subdivided Leases and
     integrating the operation of the Single Lease with that of any Subdivided
     Leases still outstanding within the overall intent of this Lease.


     8.    USE:
           ---

           8.1 Permitted Development.  The Project shall be an aviation oriented
               --------------------- 
business, office, research and development and industrial park, with offices and
facilities and space for sublease to subtenants, including tenant-required
aviation and other ancillary and related uses.

           8.2 Aviation Related Uses.  Any aviation and/or aircraft related uses
               ---------------------
shall be subject to the terms and conditions of this Lease and to the terms and
conditions governing Fixed Base Operations on the Long Beach Municipal Airport,
"Master FBO Lease", which terms and conditions are incorporated in the Master
FBO Lease attached hereto, marked Exhibit "K" and made a part hereof and shall
be binding upon Developer, its tenants, subtenants and assigns, provided,
however, as to Developer only in case of any conflict between this Lease and the
Fixed Base Operation Lease, the business terms of this Lease shall prevail,

                                      84
<PAGE>
 
and the aviation operation requirements of the Fixed Base Operation Lease shall
prevail as to aviation uses.  Access to the Airport operating areas shall be
made available for any aircraft based on the Premises.  All non-aviation areas
shall be separated from the Airport operating areas by security fencing approved
by the Airport Manager.

           8.3 Access Taxiway.  To service aircraft use or development of the
               --------------
Premises, Developer shall construct an access taxiway connecting the Premises to
existing Taxiway D concurrent with such aviation aircraft development of the
Premises, and additional taxiways if needed by Developer's subtenants.  Said
access taxiway shall be constructed to conform to federal standards and to the
standards of the Airport Manager for construction at the Airport.  After
construction, Developer shall maintain said taxiway or any apron area
constructed to a distance of twenty-five (25) feet from Taxiway D.

           8.4 Vehicle Parking.  No vehicle not related to or used in the
               ---------------
business of Developer or its subtenants or  their respective employees, agents,
guests or invitees shall be parked on the Premises for any period greater than
twenty-four (24) hours.

           8.5 Federal Aviation Administration.  Use of the Premises shall
               -------------------------------
conform to and be limited by applicable zoning regulations, any conditions
lawfully imposed by duly empowered governmental authority having jurisdiction
over the Premises, the terms, covenants, conditions and restrictions imposed by
this Lease and such lawful rules and regulations of the Federal Aviation
Administration ("FAA") as may be applicable from time to time to the Premises.
The conditions imposed by the FAA as of

                                      85
<PAGE>
 
the date of this Lease are attached hereto, marked Exhibit "L" and made a part
hereof.  The conditions set out in Exhibit "L" are applicable only to those
portions of the Premises used for aviation or aircraft purposes.  Landlord shall
cooperate fully with Developer in obtaining all required FAA approvals.
Landlord understands that FAA has been made aware of the nature of the
development proposed for the Premises and as of the date of this Lease, Landlord
has not received communication from FAA indicating that the type of development
proposed would not be permitted if it complied with all applicable regulations.

           8.6 Inspection.  At all times during the term of this Lease, Landlord
               ----------
shall retain the right of access to and ingress and egress over the Premises to
inspect aviation related operations and to enforce codes or ordinances and
provisions of this Lease, subject to governmental and reasonable subtenant
security requirements.



     9.  LIENS:
         -----

           9.1 Developer's Responsibility.  Developer shall not permit any liens
               --------------------------
to be enforced against Landlord's interests in and to the land comprising the
Premises, nor against Developer's leasehold interest therein by reason of work,
labor, services or materials supplied or claimed to have been supplied to
Developer or anyone holding the Premises, or any part thereof, through or under
Developer, and Developer agrees to indemnify Landlord against such liens.

           9.2 Notice of Work.  Before any buildings, structures  or other
               --------------
improvements or additions thereto, having a cost

                                      86
<PAGE>
 
in excess of One Hundred Fifty Thousand and No/100 Dollars ($150,000.00) are
constructed or reconstructed upon the Premises, Developer shall serve written
notice upon the Landlord in the manner specified in this Lease of Developer's
intention to perform such work for the purpose of enabling Landlord to post
notices on non-responsibility under the provisions of Section 3094 of the Civil
Code of the State of California, or any other similar notices which may be
required by law.

           9.3 Discharge of Liens.  If any mechanics liens or other liens shall
               ------------------
be filed by reason of work, labor, services or materials supplied or claimed to
have been supplied to Developer or anyone holding the Premises, or any part
thereof, through or under Developer, Developer shall cause the same to be
discharged of record within sixty (60) days after notice to Developer of the
filing thereof, or otherwise free the Premises from the effect of such claim of
lien and any action brought to foreclose such lien within such sixty  (60) day
period, or Developer, within such sixty (60) day period, shall promptly furnish
to Landlord a bond in an amount and issued by a surety company  satisfactory to
Landlord securing Developer against payment of such lien and against any and all
loss or damage whatsoever in any way arising from the failure of Developer to
discharge such lien.

           9.4 Landlord's Right to Pay.  In the event Developer fails to perform
               ----------------------- 
its obligations under subsection 9.3 above with respect to any lien within the
sixty (60) day period specified in subsection 9.3 above, Landlord may, but shall
not be obligated to pay the amount thereof, inclusive of any interest thereon,
and any costs assessed against Developer in said litiga-

                                      87
<PAGE>
 
tion, or may discharge such lien by contesting its validity or by any other
lawful means.

           9.5 Reimbursement of Landlord. Any amount paid by Landlord for any of
               -------------------------
the expenses described in subsection 9.4 above, and all reasonable legal and
other expense of Landlord, including reasonable counsel fees, and costs of suit,
in defending any such action or in connection with procuring the discharge of
such lien, with all necessary disbursements in connection therewith, together
with interest thereon at the rate provided by law from the date of payment shall
be repaid by Developer to Landlord on demand.



     10.  CONDEMNATION:
          ------------

           10.1  Definition of Terms.  The following definitions shall govern
                 ------------------- 
interpretation of this subsection.

                 10.1.1 Total Taking. The term "total taking" as used in this
                        ------------
           Section 10 means the taking of the entire Premises under the power of
           eminent domain or the taking of so much thereof as the parties
           mutually agree will prevent or substantially impair the use of the
           Premises of the uses and purposes than being made or proposed to be
           made by Developer of the Premises. If the parties do not agree as to
           whether prevention or substantial impairment has occurred, that issue
           may be arbitrated as provided in the rules for arbitration published
           by the American Arbitration Association. Each party shall pay half of
           the cost of such arbitration.

                 10.1.2  Partial Taking.  The term "partial
                         --------------
                                      88
<PAGE>
 
           taking" means the taking of a portion only of the Premises which does
           not constitute a total taking as defined above.

                10.1.3  Voluntary Conveyance.  Neither party to this Lease
                        --------------------
           will voluntary convey any interest related to this Lease to any
           agency, authority or public utility under threat of a taking under
           the power of eminent domain in lieu of formal proceedings without
           first providing written notice to the other of any request or
           intention to do so.

                 10.1.4  Date of Taking.  The term "date of taking" shall be
                         --------------
           the date title to the Premises or portion thereof passes and vests in
           the condemnor or the date of entry of an order for immediate
           possession with any judicial proceeding in eminent domain or the date
           physical possession of the Premises is taken or interfered with,
           whichever first occurs.

                 10.1.5  Leased Land.  The term "leased land" means the real
                         -----------
           property demised hereby, but exclusive of any and all improvements
           situated upon the Premises at the commencement of the Lease term and
           also exclusive of all improvements constructed or placed thereon by
           or under Developer and exclusive of any grading and other site work
           performed by or under Developer.

           10.2  Effect of Taking.  If during the term hereof there shall be a
                 ----------------
total or partial taking under the power of eminent domain, then the Leasehold
Estate of Developer in and to the Premises, in the event of a total taking, or
the portion

                                      89
<PAGE>
 
thereof taken, in the event of a partial taking, shall cease and terminate, as
of the date of taking thereof. If this Lease is so terminated in whole or in
part, all Ground Rent and other charges payable by Developer to Landlord
hereunder attributable to the Premises, or portion thereof taken, shall be paid
by Developer up to and prorated through the date of taking by the condemnor. Any
portion of the security deposit provided for in subsection 16.1.1 fairly
attributable to the terminated portion of the Leasehold Estate shall be repaid
to Developer and the parties shall thereupon be released from all further
liability in relation thereto.

           10.3  Allocation of Award.  All compensation and damages awarded in
                 -------------------
connection with any taking, total or partial, of the Premises including any
improvements thereon shall be allocated so that Developer shall receive that
portion of the award attributable to the value determined for improvements then
existing on the Premises, the value of Developer's leasehold interest in the
Premises and severance or other damages to buildings or the Leasehold Estate.
The remainder of the award, including all portions of the award attributable to
the value of the land as affected by the leasehold, and any severance or other
damages to the land, shall be payable to Landlord.

           10.4 Reduction of Ground Rent on Partial Taking. In the event of a
                ------------------------------------------
partial taking, the Ground Rent payable by Developer shall be adjusted from the
date of taking to the next adjustment date (see subsection 3.2.1).  Such Ground
Rent adjustment caused by the partial taking shall be made by reducing the
Ground Rent payable by Developer based on the ratio between the

                                      90
<PAGE>
 
fair market value of the leased land at the date of taking and the fair market
value of the leased land remaining immediately thereafter, valued for the use
being made of the leased land by Developer prior to such taking.

           10.5  Temporary Taking.  If all or any portion of the Premises shall
                 ----------------
be taken by any competent authority for temporary use or occupancy, this Lease,
at the option of Developer, shall continue in full force and effect without
reduction or abatement of rent, notwithstanding any other provision of this
Lease, statute or rule of law to the contrary, and Developer shall, in such
event, be entitled to the entire award for such taking to the extent that the
same shall be applicable to the period of such temporary use or occupancy
included in the term of this Lease and Landlord shall be entitled to the
remainder thereof.



           11.  ALTERATIONS BY DEVELOPER:
                ------------------------

           Developer shall have the right at any time and from time to time
during the Lease term to make, at its sole cost and expense, such changes and
alterations, structural or otherwise, in or to the improvements, other than
dedicated public improvements, constructed upon the Premises as Developer shall
deem necessary or desirable, including without limitation, the right to remove
and/or demolish buildings and other improvements provided that other buildings
or improvements are constructed in their place if such demolition occurs when
twenty (20) or more years are remaining in the term of this Lease, including any
extensions hereof.  The rights granted by this section shall be

                                       91
<PAGE>
 
limited to and their exercise shall comply with the terms of Section 7 and
subsection 3.3 hereof.



           12.  TAXES AND ASSESSMENTS:
                --------------------- 
                 12.1 Payment by Developer. Developer recognizes and understands
                      --------------------
that this Lease may create a possessory interest subject to property taxation
and that Landlord may be subject to the payment of property taxes on such
interest. Developer shall pay prior to delinquency all real estate taxes and
assessments on the Premises and/or Developer's possessory interests therein
levied during the term of this Lease. Developer shall not place or allow to be
placed on the Premises, or any part thereof, any mortgage, trust deed,
encumbrance or lien unauthorized by this Lease. Developer shall remove or have
removed any levy or attachment made on any of the Premises, or any part thereof,
or assure the satisfaction thereof within a reasonable time, but in any event
prior to a sale thereof. Nothing herein contained shall be deemed to prohibit
Developer from contesting the validity or amounts of any tax, assessment,
encumbrance or lien, nor to limit the remedies available to Developer in respect
thereto.

                 12.2  Installment Payments.  If any real estate, special tax or
                       --------------------
assessments are at any time during the term of this Lease, levied or assessed
against the Premises or Developer's Leasehold Estate hereunder, which, upon
exercise of any option permitted by the assessing authority, may be paid in
installments or converted to an installment payment basis (irrespective of
whether interest shall accrue on unpaid installments), Developer may elect to
pay such taxes or assessments in installments with

                                      92
<PAGE>
 
accrued interest thereon.  In the event of such election, Developer shall be
liable only for those installments of such taxes or assessments which become
payable during the term of this Lease, and Developer shall not be required to
pay any such installment which becomes due and payable after the expiration of
the term of this Lease.  Landlord shall execute whatever documents may be
necessary to convert any such taxes or assessments to such an installment
payment basis if requested so to do by Developer and if such action is
authorized by law then in effect.

                 12.3 Proration. Any real estate taxes and assessments which are
                      ---------
payable by Developer hereunder shall be prorated between Landlord and Developer
at the commencement and expiration or earlier termination of the term of this
Lease if such real estate taxes and assessments relate to a fiscal period of the
levying authority which arose before the term commenced or extends beyond the
expiration or earlier termination of the term hereof.

                 12.4 Right to Contest.  Developer and any subtenant, with
                      ----------------
Developer's consent, shall have the right to contest the amount or validity of
any real estate taxes and assessments, in whole or in part, by appropriate
administrative and legal proceedings, without any cost or expense to Landlord,
and Developer may postpone payment of any such contested real estate taxes and
assessments pending the prosecution of such proceedings and any appeals so long
as such proceedings shall operate to prevent the collection of such real estate
taxes and the sale of the Premises to satisfy any lien arising out of the
nonpayment of the same, provided, however that if at any time payment of the
whole

                                      93
<PAGE>
 
or any part thereof shall become necessary in order to prevent the termination
of the right of redemption of any property affected thereby, or if there is to
be an eviction of Developer because of nonpayment thereof, Developer shall pay
the same in order to prevent such termination of the right of redemption or such
eviction.  Landlord shall execute and deliver to Developer whatever documents
may be within Landlord's legal authority necessary or proper to permit Developer
or any subtenants, with Developer's consent, to so contest any real estate taxes
or which may be necessary to obtain payment of any refund which may result from
any such proceedings.  Any such contest shall be at no cost or expense to
Landlord.  Each refund of any tax or assessment so contested shall be paid to
Developer.



           13.  CERTIFICATES BY DEVELOPER AND LANDLORD:
                --------------------------------------
                 13.1  Developer to Provide. Developer agrees upon not less than
                       --------------------
twenty (20) days' notice by Landlord to execute, acknowledge and deliver to
Landlord a statement in writing certifying (i) that this Lease is unmodified and
in full force and effect (or if there have been modifications that the same is
in full force and effect as modified and stating the modifications); (ii)
whether or not to the best knowledge of Developer there are then existing any
offsets or defenses against the enforcement of any of the terms, covenants or
conditions hereof upon the part of Developer to be performed and, if so,
specifying the same; and (iii) the dates to which the Ground Rent and other
charges have been paid, it being intended that any such statement delivered
pursuant to this subsection may be relied upon by any prospective

                                       94
<PAGE>
 
purchaser of the fee of the real property comprising the Premises.

          13.2  Landlord to Provide.  Landlord agrees upon not less than twenty
                ------------------- 
(20) days' prior notice by Developer, to execute, acknowledge and deliver to
Developer a statement in writing certifying (i) that this Lease is unmodified
and in full force and effect (or if there have been modifications, that the same
is in full force and effect as modified and stating the modifications); (ii) the
dates to which the Ground Rent and other charges have been paid; (iii) stating
whether or not to the best knowledge of Landlord, Developer is in default in
performance of any covenant, agreement or condition contained in this Lease and,
if so, specifying each such default of which Landlord may have knowledge; and
(iv) whether or not there are to Landlord's best knowledge any offsets or
defenses claimed by and/or available to Developer to the payment or rental, it
being intended that any such statement delivered pursuant to this subsection may
be relied upon by any prospective assignee or subtenant of the whole or any
portion of the Premises, or by any lender extending credit on the security of
Developer's Leasehold Estate.



           14. QUIET ENJOYMENT:
               ---------------
           Landlord covenants that Developer, upon the performance of the
covenants and agreements herein contained on Developer's part to be performed,
shall and may at all times, for itself and its subtenants, peaceably and quietly
have, hold and enjoy the Premises during the term of this Lease.



                                       95
<PAGE>
 
           15.  TERMINATION AND FURTHER LEASING:
                -------------------------------
                 15.1 Termination. Subject to the provisions of Section 4, this
                      ----------- 
Lease may be terminated at any time by mutual agreement of the parties.

                 15.2 Termination by Developer. Developer may terminate this
                      ------------------------ 
Lease in the event Developer is unable to secure an extended coverage leasehold
policy of title insurance, within ninety (90) days following execution of this
Lease containing only those exceptions approved be Developer, provided, however,
that Developer shall have first given Landlord sixty (60) days notice of its
intention to terminate during which time Landlord shall have an opportunity to
cure the deficiency.

                 15.3 Termination by Landlord. Subject to the provision of
                      -----------------------
Section 4 of this Lease, Landlord may terminate this Lease under the following
circumstances:

                      15.3.1  Developer fails to pay rent or any other charge
           required by this Lease.

                      15.3.2  Developer assigns this Lease in violation of
           subsection 5.1.

                      15.3.3  Failure of Developer to submit drawings or related
           documents required by this Lease.

                      15.3.4  Failure of Developer to provide the good faith
           deposit required by this Lease.

                      15.3.5  Bankruptcy of Developer.  Final adjudication or
           filing of a voluntary petition for bankruptcy by Developer.

              Provided, however, that in all cases, Landlord shall give
Developer sixty (60) days prior written notice of its

                                      96
<PAGE>
 
intention to terminate, during which time Developer shall have an opportunity to
cure the default.  However, if the default is of a nature such that it cannot be
cured within sixty (60) days, Developer shall not be in default if Developer
shall commence such use and diligently prosecute it to completion.



           16. BONDS AND SECURITY DEPOSITS:
               ---------------------------
           16.1  Good Faith Deposit.
                 ------------------
                 16.1.1  Receipt by Landlord.  Developer has, concurrently
                         -------------------
           with the execution and delivery of this Lease, delivered to Landlord
           a good faith deposit in the amount of One Million and No/l00 Dollars
           ($1,000,000.00) as security for the performance of the obligations of
           Developer to be performed in accordance with the provisions of this
           Lease. The receipt of the deposit is hereby acknowledged by Landlord.

                 16.1.2  Form of Deposit.  The good faith deposit, at the
                         ---------------
           option of Developer, may be in the form of (i) cash; or (ii)
           cashier's or certified check; or (iii) negotiable certificate or
           certificates of deposit issued by a federal or state bank or savings
           and loan association; or (iv) an irrevocable letter of credit in
           favor of Landlord issued by an established bank or other institution
           satisfactory to Landlord; or (v) a bond in a form and with a surety
           reasonably satisfactory to Landlord providing for payment to Landlord
           of amounts that may become payable to Landlord under this Lease from
           time to time; or (vi) such other form of

                                      97
<PAGE>
 
           security or deposit as may be mutually acceptable. Developer may
           change the form of the deposit from time to time, at its option, to
           any other of the permitted forms of deposit. The deposit, if in cash
           or certified or cashier's check shall be deposited in an interest
           bearing account of Landlord in a bank, savings and loan association
           or trust company selected by Developer and approved by Landlord,
           which approval shall not unreasonably be withheld. Developer shall
           have the right to specify the type of account in which such funds
           are, from time to time, to be deposited. Provided that no default has
           occurred during the term of the Lease which has resulted in a
           forfeiture by Developer of all or a part of the good faith or
           security deposit, such deposit, or any portion thereof which has not
           been forfeited, shall be returned to Developer upon expiration of
           this Lease.

                 16.1.3 Interest. Landlord shall be under no obligation to pay
                        --------
or earn interest on the deposit, but if interest shall accrue or be payable
thereon such interest, when received by Landlord, shall be promptly paid to
Developer. Landlord agrees, but not more often than quarterly, upon receipt of a
request from Developer, to cause any such interest so accrued on such deposit to
be paid to Developer by the bank, savings and loan association or trust company
with which said sums have been deposited.

                 16.1.4  If Bond is Posted.  If a bond is post-
                         ----------------- 

                                      98
<PAGE>
 
           ed to satisfy the requirements of this Lease with a fixed term and if
           such bond expires prior to the date Developer is entitled to have the
           security deposit returned, Developer shall provide Landlord with
           either (i) evidence of the renewal of such bond for an additional
           period, or (ii) a new security deposit satisfying the requirements of
           subsection 16.1 in one of the forms authorized by such subsection,
           including, without limitation, a new bond, not less than twenty (20)
           days prior to the expiration of the bond posted to satisfy the
           requirements in subsection 16.1 above.

           16.2 Construction Security Deposits.  Developer has, prior to the
                ------------------------------   
execution and delivery of this Lease, delivered to Landlord a construction
deposit in the amount of One Million and No/l00 Dollars ($1,000,000.00) as
security for the performance of the obligations of Developer to be performed 
in accordance with the provisions of this Lease. The receipt of the deposit is
hereby acknowledged by Landlord.

                 16.2.1  Form of Construction Deposit.  The construction
                         ----------------------------
           deposit, at the option of Developer, may be in the form of (i) cash;
           or (ii) cashier's or certified check; or (iii) negotiable
           certificates of deposit issued by a federal or state bank or savings
           and loan association; or (iv) an irrevocable letter of credit in
           favor of Landlord issued by an established lending institution
           approved by Landlord; or (v) other form of security or deposit as may
           be mutually acceptable. Developer may change the form of the deposit
           from time

                                      99
<PAGE>
 
           to time, at its option, to any other of the permitted forms of
           deposit. The deposit, in cash or certified or cashier's check shall
           be deposited in an interest bearing account of Landlord in a bank,
           savings and loan association or trust company selected by Developer
           and approved by Landlord, which approval shall not unreasonably be
           withheld. Developer shall have the right to specify the type of
           account in which such funds are, from time to time, to be deposited.

          16.2.2  Interest.  Landlord shall be under no obligation to pay or
                  --------
earn interest on the deposit, but if interest shall accrue or be payable thereon
such interest, when received by Landlord, shall be promptly paid to Developer.
Landlord agrees, but not more often than quarterly, upon receipt of a request
from Developer, to cause any such interest so accrued on such deposit to be paid
to Landlord by the bank, savings and loan association or trust company with
which said sums have been deposited.

          16.2.3  Incorporation by Reference.  Any bond obtained by Developer
                  --------------------------
shall incorporate by reference this Lease and all of its terms and conditions.
For purposes of such bonds, no requirement of this Lease may be deemed waived.
Waiver may be accomplished only by Landlord and only in writing by the City
Manager or his duly authorized representative.

          16.2.4  Return of Deposit.  Promptly upon Developer's completion of
                  -----------------
the construction of any build-

                                      100
<PAGE>
 
          ing improvements upon the Premises and the issuance of a Certificate
          of Occupancy for such improvements, Landlord shall release and return
          to Developer a portion of the deposit described in subsection 16.2
          based upon the proportion of the number of square feet of building
          area (as measured from the exterior of exterior building walls) within
          such completed building improvements and to 665,500 square feet of
          building area.  If Developer is not in default under this Lease, the
          balance of such deposit, if any, with accrued interest shall be
          returned to Developer upon the occurrence of the Completion Date as
          specified in this Lease.

                  16.2.5  Retention of Deposit by Landlord.  In the event that
                          --------------------------------
          this Lease is terminated by Developer, in whole or in part, under
          subsection 17.5 below, or in the event that Developer elects not to
          permit Landlord to terminate this Lease by reason of Developer's
          failure to commence and complete the construction of building
          improvements upon the Premises as required by this Lease, said
          deposit, less interest accrued thereon through the date of such
          termination and also less any portion of such deposit to be returned
          to Developer under subsection 16.2.4 above, shall be retained by
          Landlord as provided in subsection 17.5 below.



          17.  GENERAL PROVISIONS:
               ------------------ 

          17.1  Notices, Demands and Communications between the Parties. Written
                -------------------------------------------------------
notices, demands, and communications be-

                                      101
<PAGE>
 
tween Landlord and Developer shall be in writing and shall be sufficiently given
if personally served or if mailed by registered or certified mail, postage
prepaid, return receipt requested, to the principal offices of Landlord or
Developer, set forth in subsection 1.5 of this Lease. Any such notice, demand or
communication so given by mailing to Landlord shall be mailed to the attention
of the City Manager. Copies of any such notice, demand or communication to be
given to Developer pursuant to this Lease shall be given to Kilroy Long Beach
Associates, Attention, President, such other entity, person or persons as he may
designate, by personal service or by mailing the same, as required by this
subsection, to such party, at the address set forth in subsection 1.5 above or
such other address as may be designated. Either Landlord or Developer may from
time to time by written notice to the other designate a different address or
addresses or party or parties to whom copies of notices, demands and
communications are to be delivered or to whose attention notices, demands and
communications are to be addressed which shall be substituted for the addresses
and/or names above specified. Notices shall be deemed served effective
immediately if personally served and effective as of the date received and set
forth on the return receipt if served by registered or certified mail.

           17.2  Conflict of Interest.  No member, official or employee of
                 -------------------- 
Landlord shall have any personal interest, direct or indirect, in this Lease,
nor shall any such member, official or employee participate in any decision
relating to this Lease which affects his personal interest or the interest of
any corporation, partnership or association in which he is, directly or

                                      102
<PAGE>
 
indirectly, interested.  No member, official or employee of Landlord shall be
personally liable to Developer, or any successor in interest, in the event of
any default or breach by Landlord or for any amount which may become due to
Developer or successor or on any obligations under the terms of this Lease.

           17.3  Enforced Delay:  Extension of Time of Performance.  In addition
                 --------------   -------------------------------- 
to other provisions of this Lease, performance by either party hereunder, shall
not be deemed to be in default where delays or defaults are unavoidable or
performance is rendered impracticable, due to war; enemy action; insurrection;
civil disturbance; strikes; lock-outs; riots; floods; earthquakes; fires;
casualties; acts of God; acts of the public enemy; epidemics; quarantine
restrictions; freight embargoes; lack of transportation; governmental
restrictions or moratoria; failure or inability to secure materials or labor by
reason of regulations or order of any governmental entity; litigation including
eminent domain proceedings or related legal proceedings; acts or failure to act
of the other party; acts or failure to act of any public or governmental agency
or entity; and the time for such performance shall be extended for a period
equal in length to such delay(s).

           17.4  Inspection of Books and Records.  Landlord has the right at all
                 -------------------------------
reasonable times during regular business hours to inspect the books and records
of the Developer pertaining to the Premises as pertinent to the purposes of this
Lease. Developer also has the right at all reasonable times during regular
business hours to inspect the books and records of the Landlord pertaining to
the Premises as pertinent to the purpose

                                      103
<PAGE>
 
 of this Lease.

           17.5  Defaults and Remedies.
                 ---------------------
                 17.5.1  Defaults - General.  Subject to the extensions of
                         ------------------
           time set forth in subsection 17.3 above, failure by either party to
           perform any term or provision of this Lease constitutes a default
           under this Lease, if not cured within thirty (30) days from the date
           of receipt of a written notice from the other party specifying the
           claimed default provided that if such default cannot reasonably be
           cured within such thirty (30) day period, the party receiving such
           notice of default shall not be in default under this Lease if such
           party commences the cure of such default within such thirty (30) day
           period and thereafter diligently prosecutes the steps to cure such
           default to completion.

                    17.5.2  Institution of Legal Actions.  In addition to any
                            ----------------------------
           other rights or remedies, either party may institute legal action to
           cure, correct, or remedy any default, to recover damages for any
           default, or to obtain any other remedy consistent with the purpose of
           this Lease. Such legal actions must be instituted in the South Branch
           of the Superior Court of the County of Los Angeles, State of
           California, in an appropriate municipal court in that county, or in
           the Federal District Court in the Central District of California. The
           prevailing party in any action commenced pursuant to this Lease shall
           be entitled to recover reasonable costs, expenses and attorneys'
           fees.

                                      104
<PAGE>
 
                 17.5.3 Applicable Law. The laws of the State of California
                        --------------
           shall govern the interpretation and enforcement of this Lease.

                 17.5.4 Service of Process. In the event any legal action is
                        ------------------
           commenced by Developer against Landlord, service of process on
           Landlord shall be made by personal service upon the City Clerk of the
           Landlord, or in such other manner as may be provided by law.

                 In the event that any legal action is commenced by Landlord
           against Developer, service of process on Developer shall be made as
           provided by law and shall be valid whether made within or without the
           State of California, or in such manner as may be provided by law.

                 17.5.5  Rights and Remedies Are Cumulative. Except as otherwise
                         ----------------------------------
           expressly stated in this Lease, the rights and remedies of the
           parties are cumulative, and the exercise by either party of one or
           more of such rights or remedies shall not preclude the exercise by
           it, at the same or different times, of any other rights or remedies
           for the same default or any other default by the other party.

                 17.5.6  Inaction Not a Waiver of Default. Any failures or
                         --------------------------------  
           delays by either party in asserting any of its rights and remedies as
           to any default shall not operate as a waiver of any default or of any
           such rights or remedies or deprive either such party of its right to
           institute and maintain any actions or proceed-

                                      105
<PAGE>
 
           ings which it may deem necessary to protect, assert or enforce any
           such rights or remedies.

                 17.5.7 Remedies. In the event of a default by Developer, which
                        -------- 
           is not cured by Developer within the times specified in this Lease,
           Landlord, without further notice to Developer, may declare this Lease
           and/or Developer's right of possession at an end and may reenter the
           Premises by process of law, in which event, Landlord shall have the
           right to recover from Developer:

                       17.5.7.1 The worth at the time of award of the unpaid
                 Ground Rent which has been earned at the time of termination,
                 plus interest;

                       17.5.7.2 The worth at the time of award of the amount by
                 which the unpaid Ground Rent which would have been earned after
                 termination until the time of award exceeds the amount of such
                 rental loss that Developer proves could have been reasonably
                 avoided, plus interest;

                       17.5.7.3 The worth at the time of award of the amount by
                 which the unpaid Ground Rent for the balance of the term after
                 the time of award exceeds the amount of such rental loss for
                 the same period that Developer proves could be reasonably
                 avoided, plus interest thereon; and

                       17.5.7.4 The remedies of Landlord as hereinabove
                 provided are subject to the other provisions of this Lease,
                 including Section 4 hereof.

                                      106
<PAGE>
 
                 17.5.8  Developer's Rights.  Developer shall have the right to
                         ------------------  
           challenge the correctness of any determination of default made by
           Landlord, and Landlord shall carefully review and consider
           Developer's challenge.

                 17.5.9 Lease Termination. Should governmental action or failure
                        -----------------
           to act preventing construction in accordance with this Lease or
           rendering it impossible, occur prior to the time that Developer has
           constructed any building upon the Premises, then Developer shall have
           the right, at its option, with the prior written approval of any
           lender which has a security interest in the Leasehold Estate, to
           cancel and terminate this Lease by giving written notice of such
           termination to Landlord, at any time prior to the construction of a
           building upon the Premises. Upon any such termination of this Lease,
           Developer and Landlord shall execute and record a quitclaim deed
           sufficient to remove the cloud of this Lease and the short form of
           this Lease from record title to the Premises and the deposits
           described in subsections 16.1 and 16.2, plus any interest accrued on
           such deposits, shall be paid to Developer by Landlord.

                 17.5.l0 Landlord's Exercise of Remedies. In the event of an
                         -------------------------------
           uncured default by Developer in the performance of any of its
           obligations to commence and complete the construction of the initial
           building within the times required by Section 7 of this Lease and in
           the further event that Landlord elects to exercise

                                      107
<PAGE>
 
           its remedy to terminate this Lease by reason of such default by
           Developer, Developer may, for a period of thirty (30) days following
           its receipt of written notice from Landlord of Landlord's election to
           terminate this Lease by reason of such default, elect to prevent such
           termination from becoming effective by releasing and paying to
           Landlord a portion of the good faith deposit held by Landlord under
           subsection 16.1, which portion shall be equal to the lesser of (i)
           the amount of such deposit so held by Landlord; or (ii) an amount
           equal to the product of One and One-half Dollar ($1.50) per square
           foot times the number of square feet of building area the failure to
           commence or complete the construction of which has caused the subject
           default or the adjusted rent per square foot if this provision
           becomes operative after any rental adjustment.

                 17.5.11  Payment to Developer.  In the event that this Lease is
                          --------------------
           terminated as a result of an uncured default by Landlord and in the
           further event that Developer has constructed streets, utilities
           and/or other off-site improvements or grading improvements upon or in
           relation to the Project prior to such termination of this Lease,
           Landlord shall, pursuant to its responsibilities under State law, use
           its best efforts to resell or relet the Premises, or any portion
           thereof, as soon and in such manner as Landlord shall find feasible
           and consistent with the objectives of such law to a qualified and
           responsible party or parties (as rea-
 
                                      108
<PAGE>
 
           sonably determined by Landlord) who will assume the obligation of
           making or completing the improvements required of Developer under
           this Lease, or such other improvements in their stead as shall be
           satisfactory to Landlord and in accordance with the uses specified
           for the Premises in this Lease. Upon such resale or reletting of the
           Premises, or any portion thereof, the proceeds thereof shall be
           applied:

                       17.5.11.1 Reimbursement to Landlord. First, to reimburse
                                 -------------------------
                 Landlord for all costs and expenses incurred, including, but
                 not limited to, salaries to personnel in connection with the
                 recapture, management, and resale or reletting of the Premises,
                 or part thereof (but less any income derived by Landlord from
                 the Premises, or part thereof, in connection with such
                 management); all taxes, assessments and water and sewer charges
                 paid with respect to the Premises, or part thereof; any
                 payments made or which are necessary to be made to discharge
                 any encumbrances or liens existing on the Premises, or part
                 thereof, at the time or revesting of title thereto in Landlord
                 or to discharge or prevent from attaching any subsequent
                 encumbrances or liens due to obligations, defaults or acts of
                 Developer, its successors or transferees; any expenditures made
                 or obligations incurred with respect to the making or
                 completion of the improvements or any part thereof on the
                 Premises, or part

                                      109
<PAGE>
 
                 thereof; and any amounts otherwise owing Landlord by Developer
                 and its successor or transferee;

                       17.5.11.2 Reimbursement to Developer. Second, to
                                 -------------------------- 
                 reimburse Developer, its successors or transferees, a sum up to
                 the amount equal to the sum of (i) the costs incurred for the
                 development of the Project, prorated to the Premises, if the
                 Premises are less than all of the Project, on a square foot
                 basis, and for the improvements existing on the Premises at the
                 time of the re-entry and repossession by Developer, less (ii)
                 any gains or income withdrawn or made by Developer from the
                 Premises or the improvements thereon; provided however, that no
                 payment shall be made to Developer if this Lease is terminated
                 as a result of an uncured default by Developer.

                       17.5.11.3 Ground Rent. Third, in the case of a reletting,
                                 ----------- 
                 to pay to Landlord an amount equal to the Ground Rent and other
                 payments payable to Landlord hereunder that Landlord would have
                 received if this Lease had not been terminated;

                       17.5.11.4 Remaining Balance. Any balance remaining after
                                 ----------------- 
                 such reimbursement shall be retained by Landlord as its
                 property. In the event that such street, utility and/or other
                 off-site improvements have been constructed by or the costs of
                 such construction were paid or reimbursed by an improvement or
                 special assessments district, the provisions

                                      110
<PAGE>
 
                 of this subsection shall be applicable to the costs for such
                 improvements if payment of the bonds issued by such district
                 have been guaranteed by Developer or are secured by security,
                 in addition to the Leasehold Estate created hereby, or paid by
                 Developer, but only to the extent of such payment by Developer
                 or of payment from the proceeds of such guarantee or security.

                 17.5.12 Delivery of Plans. In the event that this Lease is
                         -----------------   
           terminated, for any reason whatsoever, Developer shall deliver to
           Landlord one set of all plans and data in its possession concerning
           the Premises.

                 17.6 Right to Contest Laws. Developer shall have the right,
                      ---------------------
after notice to Landlord to contest or to permit its subtenants to contest by
appropriate legal proceedings, without costs or expense to Landlord, the
validity of any law, ordinance, order, rule, regulation or requirement to be
complied with by Developer under this Lease and to postpone compliance with the
same except such laws as may be adopted by Landlord, provided such contest shall
be promptly and diligently prosecuted at no expense to Landlord and so long as
Landlord shall not thereby suffer any civil penalties, sanction or be subjected
to any criminal penalties or sanctions, and Developer shall protect and save
harmless Landlord against any liability and claims for any such noncompliance or
postponement of compliance.

                 17.7 Trade Fixtures. All trade fixtures, furnishings, equipment
                      --------------
and signs installed by or under Developer or subtenants shall be and remain the
property of the person, firm

                                      111
<PAGE>
 
or corporation installing the same and shall be removable at any time during the
term of this Lease.  The removal of any such trade fixtures, furnishings,
equipment and signs shall be at the expense of the person, firm or corporation
removing the same, who shall repair any damage or injury to the Premises and all
improvements thereto occasioned by the removal thereof.  In the event that any
subtenant acquires any furniture, trade fixtures, signs and/or equipment to be
used in connection with its subleased premises from an equipment lessor or from
an equipment seller under a security agreement, Landlord agrees to execute such
documents as may reasonably be required by the equipment lessor or creditor in
order to assure such party of its prior rights in and to any such equipment,
furniture, signs and/or trade fixtures and of its right to remove any such
equipment, furniture, signs and/or trade fixtures from the subleased premises
for a period of not to exceed forty-five (45) days from and after notice to such
party of the termination or expiration of the sublease of the subject subtenant-
lessee or subtenant-debtor.

                 17.8 Continued Possession of Developer. If Developer shall hold
                      --------------------------------- 
over the Premises after the expiration of the term hereof with the consent of
Landlord, either express or implied, such holding over shall be construed to be
only a tenancy from month-to-month, subject to all the covenants, Ground Rent
conditions and obligations hereof and terminable by either party as provided by
law.

                 17.9 Utilities. Developer shall pay or cause to be paid all
                      --------- 
charges for gas, electricity, water and other utilities furnished to the
Premises during the term of this Lease and

                                      112
<PAGE>
 
all sewer use charges or similar charges or assessments for utilities levied
against the Premises for any period included within the term of this Lease.

                 17.10 Surrender. Upon the expiration of the term of this Lease,
                       ---------
as provided herein, or sooner termination of this Lease, Developer, subject to
subsection 17.5.11 shall surrender to Landlord, all and singular, the Premises,
including any buildings and all improvements constructed by or under Developer
then situated upon the Premises, and Developer shall execute, acknowledge and
deliver to Landlord within ten (10) days after written request from Landlord to
Developer, a Quitclaim Deed or other document required by any reputable title
company to remove the cloud of this Lease from the Premises. Notwithstanding the
foregoing provisions of this section to the contrary, Developer shall have the
right, at any time not less than six (6) months prior to the expiration of the
term of this Lease and for a period of sixty (60) days following the expiration
of the term to remove all or any portion of the buildings and other improvements
constructed by or under Developer upon the Premises, without obligation to
replace the same with new buildings and/or other improvements as required by
subsection 6.3 above.

                 17.11 Partial Invalidity. If any term or provision of this
                       ------------------
Lease or the application thereof to any party or circumstances shall, to any
extent, be held invalid or unenforceable, the remainder of this Lease, or the
application of such term or provision, to persons or circumstances other than
those as to whom or which it is held invalid or unenforceable, shall not be
affected thereby, and each term and provision of this

                                      113
<PAGE>
 
Lease shall be valid and enforceable to the fullest extent permitted by law.

                 17.12 Section Headings. The section and subsection headings of
                       ----------------
this Lease are inserted as a matter of convenience and reference only and in no
way define, limit or describe the scope or intent of this Lease or in any way
affect the terms and provisions hereof.

                 17.13 Short Form Lease. Concurrently with the execution and
                       ----------------   
delivery of this Lease, Landlord and Developer have executed, acknowledged and
caused to be recorded a short form of this Lease in the form attached hereto as
Exhibit "M".

                 17.14 Exhibits Incorporated. Exhibit "A" is hereby incorporated
                       --------------------- 
in this Lease. No other exhibit is incorporated in the Lease and all exhibits,
other than Exhibit "A", may be changed or modified by agreement between Landlord
and Developer at any time and from time to time without amending this Lease.

                 17.15  Entire Agreement, Waivers and Amendments. This Lease is
                        ----------------------------------------
executed in three (3) triplicate originals, each of which is deemed to be an
original.  It constitutes the entire understanding and agreement of the parties.
This Lease integrates all the terms and conditions mentioned herein or
incidental hereto, and supersedes all negotiations or previous agreements
between the parties with respect to all or any part of the subject matter
hereof.

                 17.16 Waivers. All waivers of the provisions of this Lease must
                       -------
be in writing by the appropriate authorities of Landlord or Developer, and all
amendments hereto must be in writing by the appropriate authorities of Landlord
and Developer.

                                      114
<PAGE>
 
                 17.17 Approvals. Except where specific criteria are set forth
                       ---------
as a condition to approving or disapproving a matter or course of action,
including but not limited to assignment (subsection 5.4), and subletting
(subsection 5.7.2), in all circumstances where under this Lease either party is
required to approve or disapprove any matter, such approval shall not be
unreasonably withheld.

                 17.18 Successors in Interest. The provisions of this Lease
                       ----------------------
shall be binding upon and shall inure to the benefit of the heirs, executors,
assigns and successors in interest of the parties hereto.

                 17.19 "And/Or". Whenever the words and symbols "and/or" are
                       -------
used in this Lease, it is intended that this Lease be interpreted and the
sentence, phrase or other part be considered in both its conjunctive and
disjunctive sense, and as having been written twice, once with the word "and"
inserted, and once with the word "or" inserted, in the place of said words
and symbol "and/or".

                 17.20 "Including" Defined. The use of the word "including", or
                       -------------------  
"include", when followed by any general statement, term or matter, will not be
construed to limit such statement, term or matter to the specific items or
matters set forth immediately following such work or to similar items, terms or
matters, but rather will be deemed to refer to all other items, terms or matters
that could reasonably fall within the broadest possible scope of such general
statement, term, item or matter.

                 17.21 Right of First Refusal to Purchase. If Landlord shall
                       ----------------------------------
determine during the term of this Lease that it is

                                      115
<PAGE>
 
lawful and in the public interest to sell the Premises, or any portion thereof,
Landlord shall, prior to making the Premises or part thereof available for sale
to any other party, provide Developer with the opportunity to purchase said
property at its fair market value, as determined by an appraisal obtained by
Landlord.  If Developer has not entered into an agreement to purchase said
property within sixty (60) days of the date it is first offered for sale to
Developer at the price theretofore determined by Landlord to be the fair market
value, Landlord may offer the property for sale on the open market.  Provided,
however, that if Landlord should reduce the fair market value of the Premises or
part thereof to be sold by seven and one-half percent (7.5%) or more,
Developer's first refusal rights shall be reinstated.  Developer shall respond
to any such re-offer within five (5) business days, and if Developer fails to
respond within that time period Developer's first refusal rights shall
terminate. The determination whether such property shall be made available for
sale is and shall be within the sole and exclusive discretion of Landlord.
Landlord shall determine the legality of such action prior to making a
determination to sell on the basis of the law then in effect.

                 17.22 If Developer is a Trustee. If Developer is a Trustee,
                       -------------------------
this Lease is executed by the undersigned Trustee, not personally, but solely as
Trustee, and it is expressly understood and agreed by the parties hereto,
anything contained herein to the contrary notwithstanding, that each and all of
the covenants, undertakings, representations and agreements herein made are
intended, not as personal covenants, undertakings, representations

                                      116
<PAGE>
 
and agreements of the Trustee, individually, or for the purpose of binding the
Trustee personally, but this Lease is executed and delivered by the Trustee
solely in the exercise of the powers conferred upon the Trustee as such Trustee
under the trust agreement and no personal liability or personal responsibility
is assumed by, nor shall at any time be asserted or enforced against said
Trustee on account hereof, or on account of any covenant, undertaking,
representation, warranty or agreement herein contained, either expressed or
implied, and all such personal liability, if any, being hereby expressly waived
and released by the parties hereto, and by all persons claiming by or under said
parties.  The provisions of this subsection 17.22 shall apply to any Trustee
succeeding in whole or in part to the interests of Developer hereunder.

                 17.23 Limitation of Liability of Partners. From and after the
                       -----------------------------------
completion of the construction of the improvements described in this Lease,  if
Developer at any such time shall be a partnership or joint venture, Landlord
shall look solely to the assets of such partnership or joint venture for the
collection or satisfaction of any money judgment which Landlord may recover
against Developer, and Landlord shall not look for the collection or
satisfaction of any such judgment to the personal assets of any person who shall
at any time be a partner, joint venturer or participant in or under any such
partnership or joint venture. The provisions of the subsection shall be binding
upon Landlord and each and every future owner of Landlord's interest under this
Lease and shall insure to the benefit of each and every such partner, joint
venturer and participant.

                                      117
<PAGE>
 
                 17.24 Approvals. Except as otherwise specifically provided in
                       ---------
this Lease, all approvals to be done by Landlord may be done by Landlord's City
Manager or his designee.



           IN WITNESS WHEREOF, Landlord and Developer have signed this Lease as
of the date opposite their signature.

                              CITY OF LONG BEACH, a municipal corporation
                              


     July 17, 1985            By: /s/    [SIGNATURE APPEARS HERE]    
                                  ----------------------------------------- 
                                                City Manager
                              LANDLORD


                              KILROY LONG BEACH ASSOCIATES, a 
                              California limited partnership

                              By:  KILROY LONG BEACH DEVELOPMENT CORPORATION,
                                   General Partner


     July 10, 1985                 By: /s/ John B. Kilroy, Jr.
                                       ------------------------------------ 
                                           JOHN B. KILROY, JR. 
                                                President 

                              DEVELOPER


           This Lease Agreement is approved as to form this 17th day of 
July, 1985.

                              ROBERT W. PARKIN, City Attorney


                              By:   [SIGNATURE APPEARS HERE]
                                                              Deputy


                                      118
<PAGE>
 
                 17.24 Approvals. Except as otherwise specifically provided in
                       --------- 
 this Lease, all approvals to be done by Landlord may be done by Landlord's City
 Manager or his designee.


           IN WITNESS WHEREOF, Landlord and Developer have signed this Lease as
of the date opposite my seal.


STATE OF CALIFORNIA 
COUNTY OF LOS ANGELES

On  July 17, 1985  , before me, the undersigned a Notary Public and for said
  -----------------
State, personally appeared JOHN E. DEVER personally known to me to be the person
who executed this instrument as CITY MANAGER of the City of Long Beach, a
municipal corporation, and acknowledged to me that the municipal corporation
executed it.

WITNESS My hand and official seal.
                                                     
                   
SIGNATURE:         /s/ Jo Ann Burns
                  --------------------               [SEAL APPEARS HERE]
                       JO ANN BURNS

    JULY 10    ,  1985                            By: /s/ John B. Kilroy, Jr.   
- ---------------                                      ------------------------ 
                                                          JOHN B. KILROY, JR.
                                                               President

                                   DEVELOPER



          This Lease Agreement is approved as to form this 17 day of July, 1985.

          
                                       ROBERT W  PARKIN, City Attorney

                                       By: [SIGNATURE APPEARS HERE]
                                                                    Deputy



                                      118
<PAGE>
 

                          DEVELOPER'S  ACKNOWLEDGMENT
                          ---------------------------


STATE OF CALIFORNIA             )
                                )  ss.
COUNTY OF LOS ANGELES           )
    
     On July 10, 1985, before me, the undersigned, a Notary Public in and for
said State, personally appeared John B. Kilroy, Jr., personally known to me or
proved to me on the basis of satisfactory evidence to be the person that
executed this instrument as President of Kilroy Long Beach Development
Corporation, the corporation that executed this instrument as the general
partner of Kilroy Long Beach Associates, a California Limited Partnership, the
partnership that executed the within instrument, and acknowledged to me that
such corporation executed the same as such partner and that said partnership
executed the same.

                    WITNESS my hand and official seal.

( SEAL )

                                                 /s/  Nadine K. Kirk
[SEAL APPEARS HERE]                               --------------------------
                                                 Notary Public in and for
                                                 said State
<PAGE>
 
                               LEGAL DESCRIPTION
                               -----------------
                                        


THAT PORTION OF PARCEL 1, IN THE CITY OF LONG BEACH, IN THE COUNTY OF LOS
ANGELES, STATE OF CALIFORNIA, AS SHOWN ON A RECORD OF SURVEY, FILED IN BOOK 85,
PAGE 19, OF RECORD OF SURVEYS, IN THE OFFICE OF THE COUNTY RECORDER OF SAID
COUNTY, TOGETHER WITH THOSE PORTIONS OF LOTS 5 AND 9, TRACT NO. 10548, IN SAID
CITY, COUNTY OF STATE, AS PER MAP RECORDED IN BOOK 174, PAGES 15 TO 23,
INCLUSIVE OF MAPS, IN SAID RECORDER'S OFFICE, AND TOGETHER WITH THAT PORTION OF
LAKEWOOD BOULEVARD (FORMERLY KNOWN AS CERRITOS AVENUE, 80 FEET WIDE) AS SHOWN ON
SAID MAP OF TRACT NO. 10548, NOW VACATED BY THE STATE OF CALIFORNIA HIGHWAY
COMMISSION, A CERTIFIED COPY OF WHICH WAS RECORDED MAY 19, 1959, AS INSTRUMENT
NO. 3601, OF OFFICIAL RECORDS, IN THE OFFICE OF SAID COUNTY RECORDER, DESCRIBED
AS A WHOLE AS FOLLOWS:

BEGINNING AT THE MOST SOUTHERLY CORNER OF SAID PARCEL 1, SAID RECORD OF SURVEY;
THENCE NORTH 00 DEGREES 00 MINUTES 46 SECONDS EAST 324.60 FEET, ALONG THE
WESTERLY LINE OF SAID PARCEL 1, TO THE NORTHWESTERLY CORNER OF SAID PARCEL 1,
SAID NORTHWESTERLY CORNER BEING A POINT IN A NON-TANGENT CURVE CONCAVE NORTHERLY
AND HAVING A RADIUS OF 1,050.00 FEET, A RADIAL LINE THAT BEARS SOUTH 2 DEGREES
06 MINUTES 54 SECONDS WEST TO SAID POINT, SAID CURVE ALSO BEING THE NORTHERLY
LINE OF SAID PARCEL 1; THENCE EASTERLY ALONG SAID CURVE THROUGH A CENTRAL ANGLE
OF 27 DEGREES 32 MINUTES 10 SECONDS AN ARC DISTANCE OF 504.63 FEET TO A POINT,
SAID LAST MENTIONED POINT BEING A RADIAL LINE THAT BEARS SOUTH 25 DEGREES 25
MINUTES 16 SECONDS EAST, TO SAID LAST MENTIONED POINT; THENCE SOUTH 45 DEGREES
22 MINUTES 59 SECONDS EAST 1,403.34 FEET TO A POINT IN THAT CERTAIN COURSE AS
DESCRIBED AS HAVING A BEARING AND LENGTH OF "SOUTH 34 DEGREES 15 MINUTES 50
SECONDS WEST 225.46 FEET" IN THE NORTHWESTERLY BOUNDARY OF THAT PARCEL OF LAND
DESCRIBED AS PARCEL 1 IN DEED TO STATE OF CALIFORNIA, RECORDED MARCH 18, 1959,
AS INSTRUMENT NO. 1904, OF OFFICIAL RECORDS, OF SAID COUNTY, SAID LAST MENTIONED
POINT BEING NORTH 34 DEGREES 16 MINUTES 23 SECONDS EAST 40.81 FEET, ALONG SAID
COURSE, FROM THE SOUTHWESTERLY TERMINUS THEREOF; THENCE SOUTH 34 DEGREES 16
MINUTES 23 SECONDS WEST 40.81 FEET, ALONG SAID COURSE, TO THE NORTHEASTERLY
TERMINUS OF THAT CERTAIN COURSE IN SAID NORTHWESTERLY BOUNDARY, AS DESCRIBED IN
SAID LAST MENTIONED PARCEL 1, AS HAVING A BEARING AND LENGTH OF "SOUTH 62
DEGREES 04 MINUTES 30 SECONDS WEST, 51.05 FEET, MORE OR LESS,"; THENCE SOUTH 62
DEGREES O5 MINUTES 03 SECONDS WEST ALONG SAID LAST MENTIONED CERTAIN COURSE, TO
THE NORTHEASTERLY TERMINUS OF THAT CERTAIN COURSE AS DESCRIBED AS HAVING A
BEARING AND LENGTH OF "SOUTH 62



                                  EXHIBIT "A"

                               Page 1 of 2 Pages
<PAGE>
 
DEGREES 04 MINUTES 30 SECONDS WEST, 113.28 FEET" IN SAID LAKEWOOD BOULEVARD, NOW
VACATED BY THE CALIFORNIA HIGHWAY COMMISSION; THENCE SOUTH 62 DEGREES O5 MINUTES
03 SECONDS WEST ALONG SAID LAST MENTIONED CERTAIN COURSE TO THE NORTHEASTERLY
TERMINUS OF THAT COURSE AS DESCRIBED AS HAVING A BEARING AND LENGTH OF "SOUTH 62
DEGREES 04 MINUTES 30 SECONDS WEST 704.56 FEET" IN THE NORTHERLY BOUNDARY OF
THAT PARCEL OF LAND DESCRIBED AS PARCEL 1 IN DEED TO THE STATE OF CALIFORNIA,
RECORDED MAY 11, 1959, AS INSTRUMENT NO. 1870, OF OFFICIAL RECORDS, OF SAID
COUNTY; THENCE ALONG SAID LAST MENTIONED NORTHERLY BOUNDARY SOUTH 62 DEGREES O5
MINUTES 03 SECONDS WEST 704.56 FEET, SOUTH 80 DEGREES O5 MINUTES 43 SECONDS WEST
105.00 FEET AND NORTH 80 DEGREES 14 MINUTES 59 SECONDS WEST 676.33 FEET; THENCE
NORTH 9 DEGREES 45 MINUTES 01 SECONDS EAST 570.00 FEET; THENCE NORTH 25 DEGREES
20 MINUTES 00 SECONDS EAST 15.00 FEET; THENCE NORTH 8 DEGREES 44 MINUTES 49
SECONDS WEST 248.97 FEET TO THE SOUTHERLY PROLONGATION OF SAID WESTERLY LINE OF
PARCEL 1, AS SHOWN ON SAID RECORD OF SURVEY; THENCE NORTH 0 DEGREES 00 MINUTES
46 SECONDS EAST 72.14 FEET ALONG SAID PROLONGATION, TO THE POINT OF BEGINNING.

ALSO EXCEPTING THEREFROM ALL OIL, GAS AND OTHER HYDROCARBONS IN AND UNDER, OR
WHICH MAY BE PRODUCED OR SAVED FROM SAID LAND; TOGETHER WITH ALL RIGHTS OF EVERY
KIND AND DESCRIPTION WHATSOEVER TO DRILL FOR, DEVELOP, TAKE, REMOVE, AND SEVER
THE SAME, OR ANY PART THEREOF, FROM SAID LAND, WITHOUT, HOWEVER, THE RIGHT TO
THE USE OF THE SURFACE OF SAID LAND IN CONNECTION WITH THE DEVELOPMENT OR
REMOVAL OF SAID OIL, GAS OR OTHER HYDROCARBONS, ALL DRILLING AND BORING FOR SAID
PURPOSES TO BE DONE BENEATH THE SURFACE OF SAID LAND AT ANY LEVEL, OR LEVELS,
100 FEET, OR MORE, BELOW THE SURFACE THEREOF, THE SURFACE OPENING OF THE WELL
HOLE TO BE LOCATED ON LAND OTHER THAN THE LAND ABOVE DESCRIBED, AS RESERVED IN
THE DEED FROM BIXBY LAND COMPANY, A CORPORATION, RECORDED AUGUST 25, 1948 IN
BOOK 28072 PAGE 204, OFFICIAL RECORDS, AND RECORDED FEBRUARY 10, 1950 IN BOOK
32238 PAGE 67 OFFICIAL RECORDS AND RECORDED DECEMBER 28, 1950 IN BOOK 35179 PAGE
303, OFFICIAL RECORDS AND RECORDED DECEMBER 28, 1950 IN BOOK 35179 PAGE 310,
OFFICIAL RECORDS.



                                  EXHIBIT "A"

                               Page 2 of 2 Pages
<PAGE>
 
                              [MAP APPEARS HERE]





























   



























                                  EXHIBIT "B"





<PAGE>
 
                              [MAP APPEARS HERE}




































































                                  EXHIBIT "C"
<PAGE>
 
                       KILROY AIRPORT CENTER LONG BEACH
                       CATEGORIES OF PRE DEVELOPMENT AND
                             INFRASTRUCTURE COSTS
                  (DURING AND RELATED TO INITIAL CONSTRUCTION
                     WHICH MAY BE ACCOMPLISHED IN PHASES)


Note:  Exhibit "D" consists of a map and the following text.

1.  FEES
    1.1  Filing Fees
    1.2  Inspection Fees
    1.3  Plan Check & Permits
    1.4  Sewer Area Fees
    1.5  Flood Control Fees
    1.6  Recording Fees
    1.7  Other Fees

2.  GENERAL
    2.1  Legal & Audit Fees
    2.2  Bonds
    2.3  Insurance
    2.4  Taxes & Assessments During Construction
    2.5  Laboratory Testing
    2.6  Unusual or Temporary Security
    2.7  Utilities During Construction
    2.8  Prints and Other Direct Costs

3.  SITE INVESTIGATION
    3.1  Survey and Parcel Map
    3.2  Title Report
    3.3  Borings
    3.4  Soil Tests

4.  ARCHITECTURE AND ENGINEERING
    4.1  Site Planning
    4.2  Civil Engineering
    4.3  Electrical Engineering
    4.4  Mechanical Engineering
    4.5  Traffic Study
    4.6  Signal Engineering
    4.7  Landscape Architecture
    4.8  Structural Engineering
    4.9  Water Department Specifications

5.  DEMOLITION
    5.1  Utilities
    5.2  Temporary Service to Adjacent Sites
    5.3  NIKE Bunkers
    5.4  Surface Buildings
    5.5  Asphalt Paving
    5.6  Concrete Slabs
    5.7  Fencing
    5.8  Allowance for Underground Items


                                  EXHIBIT "D"
                               Page 1 of 4 Pages
<PAGE>
 
6.  SITE PREPARATION
    6.1  Relocate Existing Signs
    6.2  Temporary Construction Fences
    6.3  Testing for Hazardous Materials
    6.4  Allowance for Unforseen Site Conditions
    6.5  National Guard Accesses

7.  EXCAVATION AND GRADING
    7.1  Grub and Rough Grade
    7.2  Remove and Recompact
    7.3  Scarify and Recompact
    7.4  Import Fill, Compact and Grade
    7.5  Fine Grade Street Easement

8.  SEWERS
    8.1  Sewer Mains, Approximate Sizes
       8.1.1  l8" Main
       8.1.2  8" Main
    8.2  Lateral Stub Outs to Interior Edge of Sidewalk Easement
    8.3  Manholes
    8.4  Join Existing Sewer

9.  STORM DRAINS
    9.1           Main Storm Drains, Approximate Sizes
       9.1.1                          33"      Main
       9.1.2                          30"      Main
       9.1.3                          27"      Main
       9.1.4                          24"      Main
       9.1.5                          18"      Main
    9.2  Catch Basins
    9.3  Lateral Stub Outs to Interior Edge of Sidewalk Easement
    9.4  Manholes
    9.5  Erosion Control on Parcels

10. WATER, APPROXIMATE SIZES
    10.1   12" Water Main
    10.2   Vaults and Lateral Stubs Outs to Interior Edge of Sidewalk Easement
    10.3   Hot Taps
    10.4   12" Valves
    10.5   Blow off Valve
    10.6   Air Evacuation Assembly
    10.7   Fire Hydrants
    10.8   Irrigation Backflow Preventers
    10.9   Service Connections
    10.10  Relocate Surge Tank
    10.11  Relocate Existing Meters



                                  EXHIBIT "D"
                               Page 2 of 4 Pages
<PAGE>
 
11. ELECTRICAL
    11.1  Six Main Conduits, Approximately 5"
    11.2  Lateral Stub Outs to Interior Edge of Sidewalk Easement
    11.3  Irrigation Transformer Vaults
    11.4  Manholes

12. GAS
    12.1  Gas Main
    12.2  Lateral Stub Outs to Interior Edge of Sidewalk Easement
    12.3  Valves
    12.4  Engineering

13. TELEPHONE
    13.1  Ten Main Conduits, Approximately 4"
    13.2  Lateral Stub Outs to Interior Edge of Sidewalk Easement
    13.3  Manholes

14. PERIMETER WALLS & FENCES
    14.1  8' 4" Screen Wall
    14.2  Remove Temporary Fences
    14.3  Chain Link Security Fence

15. STREET IMPROVEMENTS
    15.1  Intersection at Spring and KAC Drive
         15.1.1  Curb Demolition
         15.1.2  Asphalt Paving Demolition
         15.1.3  Excavation
         15.1.4  Retaining Wall
         15.1.5  Back Fill
         15.1.6  Curb and Gutter
         15.1.7  Asphalt Paving
         15.1.8  Traffic Signal
         15.1.9  Restriping
    15.2  Intersection at Redondo and KAC Drive
         15.2.1  Curb Demolition
         15.2.2  Asphalt Paving Demolition
         15.2.3  Curb and Gutter
         15.2.4  Asphalt Paving
         15.2.5  Traffic Signal
    15.3  Intersection at Spring and Redondo
         15.3.1  Modify Traffic Signal
    15.4  Kilroy Airport Center Drive
         15.4.1  Curb and Gutter
         15.4.2  Asphalt Street Paving
         15.4.3  Crosswalk Pavers
         15.4.4  Concrete Sidewalks
         15.4.5  Curb
         15.4.6  Street Lights



                                  EXHIBIT "D"
                               Page 3 of 4 Pages
<PAGE>
 
16.  SIGNS
    16.1  Street Name Signs
    16.2  Stop Signs

17. LANDSCAPE IN THE AREAS SHOWN ON THE ATTACHED DRAWING
    17.1  Soil Preparation & Fine Grading
    17.2  Finish Grading
    17.3  Irrigation
    17.4  Trees, Approximate Size
         17.4.1  72"                        Box
         17.4.2  60"                        Box
         17.4.3  48"                        Box
         17.4.4  36"                        Box
    17.5  Hedges/Shrubs, Approximate Size
         17.5.1  15 Gallon
         17.5.2   5 Gallon
         17.5.3   1 Gallon
    17.6  Sodded Turf/Ground Cover
    17.7  Landscape Curb or Similar Separation Between Landscaped Areas and
             Undeveloped Portions of parcels at Perimeter of Site

18. MISCELLANEOUS
    18.1  Developer Overhead and Supervision (6%)
    18.2  Burden
    18.3  Contingency


    NOTE:  Specific sizes referenced above are estimates only as of the date of
           the Ground Lease and are subject to change based upon final
           engineering.

    NOTE:  Specialty contractor and subcontractor overhead and supervision shall
           be included in each individual line item cost.

    NOTE:  Developer's Overhead & Supervision (item 18.1) applies whether
           Developer is the developer or is the Construction Manager (if the
           City of Long Beach causes the work to be performed).

                                  EXHIBIT "D"
                               Page 4 of 4 Pages
<PAGE>
 
                              [MAP APPEARS HERE]
<PAGE>
 
                              [MAP APPEARS HERE]
<PAGE>
 
                         AGREEMENT OF NON-DISTURBANCE

    THIS AGREEMENT is made as of the _________ day of ___________,
198___, by and among the CITY OF LONG BEACH, a Municipal
Corporation (hereinafter called "Landlord"); KILROY LONG BEACH
ASSOCIATES, a California Limited Partnership, (hereinafter called
"Developer"); and ________________________________________________
(hereinafter called "Subtenant").



                                  PRELIMINARY

    A.  Landlord and Developer have entered into a Lease 
Agreement dated ______________________ (hereinafter referred to as 
the "Ground Lease")  pursuant to which Landlord has demised and 
leased to Developer certain real property located in the City of
Long Beach, County of Los Angeles, State of California, including the real
property described in Exhibit "A" attached hereto and incorporated herein.  
A short form of the Ground Lease was recorded _____________, 198__ in the
Official Records of said County.


    B.  Developer, as Sublandlord, and Subtenant, as subtenant, have entered
into a Sublease dated _______________________, 198__, (hereinafter referred to
as the "Sublease") which Sublease demises to Subtenant a portion of the premises
demised by the Ground Lease (and grants to Subtenant certain rights with respect



                                  EXHIBIT "E"
                               Page 1 of 7 Pages
<PAGE>
 
to other portions of the premises demised by the Ground Lease). A short form of
the Sublease is being recorded concurrently herewith in the Official Records of
said County, which short form of Sublease describes the premises demised thereby
(and the other rights and obligations of Subtenant with respect to the real
property described in the attached Exhibit "A").


    C.  The parties hereto now desire to enter into this Agreement so as to
clarify their rights, duties and obligations under the Ground Lease and the
Sublease and to further provide for various contingencies as hereinafter set
forth.


    NOW THEREFORE, in consideration of the foregoing and of the mutual agreement
of the parties hereto to the terms and conditions hereinafter contained, the
parties hereto agree as follows:


    1.  In the event Developer shall default in the payment of any sum or in the
performance of any covenant or condition of the Ground Lease, all as provided
therein, or in the event of any termination or expiration of the Ground Lease
for any reason whatsoever prior to the expiration of the term of the Sublease as
provided in the Sublease (other than a termination of the Ground Lease only as
to portions of the premises demised thereby not described in the attached
Exhibit "A"), then Landlord, Developer and Subtenant do hereby agree that the
Sublease, and all terms, provisions, covenants and agreements thereof shall
survive any



                                 EXHIBIT "E" 
                               Page 2 of 7 Pages
<PAGE>
 
such default or defaults in, or termination or expiration of the Ground Lease,
whether such termination occurs as a result of, or arising out of, any such
default or defaults, or otherwise, and the Sublease (subject to the rights of
any Leasehold Mortgagee, as defined in the Ground Lease, to enter into a New
Lease with Landlord upon the same terms and conditions and having the same
priority as the Ground Lease, pursuant to subsection 4.8 of the Ground Lease)
shall continue in force and effect in accordance with and subject to all of its
terms, provisions, agreements and covenants as a direct lease with Landlord, as
landlord, and Subtenant, as lessee. Subtenant agrees, in such event, to attorn
to Landlord and to recognize Landlord as the landlord under the Sublease.
Landlord shall, in such event, exercise and undertake all of the rights,
obligations and duties of Developer in and under said Sublease and thereafter
shall be entitled to collect all rents and payments due and payable under said
Sublease, including the right to collect any sums being due and payable
thereunder prior to the termination or expiration of the Ground Lease which are
accrued and unpaid by Subtenant on the date of termination of the Ground Lease.
Subtenant agrees not to prepay rentals under the Sublease beyond the amounts
provided in the Sublease without the prior written consent of Landlord.

    2.  Landlord agrees that, prior to terminating the Ground Lease or taking
any proceedings to enforce any such termination thereof for any reason other
than the expiration of the term of



                                 EXHIBIT "E" 
                               Page 3 of 7 Pages
<PAGE>
 
the Ground Lease as provided therein, Landlord shall give Subtenant thirty (30)
days' notice in writing prior to the effective date of such termination,
specifying the reason for such termination.  Such notice shall be given to
Subtenant at the address provided in the Sublease for notices to Subtenant.
Subtenant may change such address by written notice to Landlord.


    3.  Landlord hereby approves of the Sublease and of the rights and
privileges granted to Subtenant thereunder and agrees that, for and during the
term of the Sublease and any extensions thereof, Landlord shall not take any
action, directly or indirectly, to disturb or otherwise affect Subtenant's
occupancy of and/or rights and privileges with respect to the premises demised
by the Ground Lease and described on the attached Exhibit "A" so long as
Subtenant is not in default under the Sublease, nor shall Subtenant's exercise
of any such rights or privileges constitute a default under the Ground Lease,
notwithstanding any provisions to the contrary contained in the Ground Lease.


    4.  No provision contained herein shall be deemed an amendment or
modification of any provision contained in the Sublease, including, without
limiting the generality of the foregoing, any rights given thereunder to
Developer to terminate the Sublease.


    5.  In the event that the Ground Lease is divided, in accordance with its
terms, into two (2) or more New Leases or



                                  EXHIBIT "E"
                               Page 4 of 7 Pages
<PAGE>
 
Separate Leases, the term "Ground Lease", as used herein, shall be deemed to
refer to the said New Lease or Separate Lease leasing and demising the subleased
premises.


    6.  This Agreement shall be binding upon and shall inure to the benefit of
the parties hereto and their successors, transferees and assigns.

                                  EXHIBIT "E"


                               Page 5 of 7 Pages





















<PAGE>
 
    IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the day and year first hereinabove set forth.



                             CITY OF LONG BEACH,

                             A Municipal Corporation


                             By:_______________________________________


                             Title:____________________________________



                             KILROY LONG BEACH ASSOCIATES,

                             A California Limited Partnership


                             By:  KILROY INDUSTRIES, a California Corporation,
                                  General Partner


                                  By:__________________________________


                                  Title:_______________________________


                             By:_______________________________________


                             By:_______________________________________

                                         "Developer"

                             
                             ------------------------------------------


                             ------------------------------------------

                                         "Subtenant"



                                  EXHIBIT "E"

                               Page 6 of 7 Pages
<PAGE>
 
    This Agreement is hereby approved as to form this _________

day of_________________, 198___.


                             ROBERT W. PARKIN, City Attorney


                             BY:________________________________

                                          "Deputy"



                                  EXHIBIT "E"
                               Page 7 of 7 Pages
<PAGE>
 
                               LEGAL DESCRIPTION



THAT PORTION OF PARCEL 1, IN THE CITY OF LONG BEACH, IN THE COUNTY OF LOS
ANGELES, STATE OF CALIFORNIA, AS SHOWN ON A RECORD OF SURVEY, FILED IN BOOK 85,
PAGE 19, OF RECORD OF SURVEYS, IN THE OFFICE OF THE COUNTY RECORDER OF SAID
COUNTY, TOGETHER WITH THOSE PORTIONS OF LOTS 5 AND 9, TRACT NO. 10548, IN SAID
CITY, COUNTY OF STATE, AS PER MAP RECORDED IN BOOK 174, PAGES 15 TO 23,
INCLUSIVE OF MAPS, IN SAID RECORDER'S OFFICE, AND TOGETHER WITH THAT PORTION OF
LAKEWOOD BOULEVARD (FORMERLY KNOWN AS CERRITOS AVENUE, 80 FEET WIDE) AS SHOWN ON
SAID MAP OF TRACT NO. 10548, NOW VACATED BY THE STATE OF CALIFORNIA HIGHWAY
COMMISSION, A CERTIFIED COPY OF WHICH WAS RECORDED MAY 19, 1959, AS INSTRUMENT
NO. 3601, OF OFFICIAL RECORDS, IN THE OFFICE OF SAID COUNTY RECORDER, DESCRIBED
AS A WHOLE AS FOLLOWS:

BEGINNING AT THE MOST SOUTHERLY CORNER OF SAID PARCEL 1, SAID RECORD OF SURVEY;
THENCE NORTH 00 DEGREES 00 MINUTES 46 SECONDS EAST 324.60 FEET, ALONG THE
WESTERLY LINE OF SAID PARCEL 1, TO THE NORTHWESTERLY CORNER OF SAID PARCEL 1,
SAID NORTHWESTERLY CORNER BEING A POINT IN A NON-TANGENT CURVE CONCAVE NORTHERLY
AND HAVING A RADIUS OF 1,050.00 FEET, A RADIAL LINE THAT BEARS SOUTH 2 DEGREES
06 MINUTES 54 SECONDS WEST TO SAID POINT, SAID CURVE ALSO BEING THE NORTHERLY
LINE OF SAID PARCEL 1; THENCE EASTERLY ALONG SAID CURVE THROUGH A CENTRAL ANGLE
OF 27 DEGREES 32 MINUTES 10 SECONDS AN ARC DISTANCE OF 504.63 FEET TO A POINT,
SAID LAST MENTIONED POINT BEING A RADIAL LINE THAT BEARS SOUTH 25 DEGREES 25
MINUTES 16 SECONDS EAST, TO SAID LAST MENTIONED POINT; THENCE SOUTH 45 DEGREES
22 MINUTES 59 SECONDS EAST 1,403.34 FEET TO A POINT IN THAT CERTAIN COURSE AS
DESCRIBED AS HAVING A BEARING AND LENGTH OF "SOUTH 34 DEGREES 15 MINUTES 50
SECONDS WEST 225.46 FEET" IN THE NORTHWESTERLY BOUNDARY OF THAT PARCEL OF LAND
DESCRIBED AS PARCEL 1 IN DEED TO STATE OF CALIFORNIA, RECORDED MARCH 18, 1959,
AS INSTRUMENT NO. 1904, OF OFFICIAL RECORDS, OF SAID COUNTY, SAID LAST MENTIONED
POINT BEING NORTH 34 DEGREES 16 MINUTES 23 SECONDS EAST 40.81 FEET, ALONG SAID
COURSE, FROM THE SOUTHWESTERLY TERMINUS THEREOF; THENCE SOUTH 34 DEGREES 16
MINUTES 23 SECONDS WEST 40.81 FEET, ALONG SAID COURSE, TO THE NORTHEASTERLY
TERMINUS OF THAT CERTAIN COURSE IN SAID NORTHWESTERLY BOUNDARY, AS DESCRIBED IN
SAID LAST MENTIONED PARCEL 1, AS HAVING A BEARING AND LENGTH OF "SOUTH 62
DEGREES 04 MINUTES 30 SECONDS WEST, 51.05 FEET, MORE OR LESS,"; THENCE SOUTH 62
DEGREES 05 MINUTES 03 SECONDS WEST ALONG SAID LAST MENTIONED CERTAIN COURSE, TO
THE NORTHEASTERLY TERMINUS OF THAT CERTAIN COURSE AS DESCRIBED AS HAVING A
BEARING AND LENGTH OF "SOUTH 62



                                 EXHIBIT "A" 
                               Page 1 of 2 Pages
<PAGE>
 
DEGREES 04 MINUTES 30 SECONDS WEST, 113.28 FEET" IN SAID LAKEWOOD BOULEVARD, NOW
VACATED BY THE CALIFORNIA HIGHWAY COMMISSION; THENCE SOUTH 62 DEGREES 05 MINUTES
03 SECONDS WEST ALONG SAID LAST MENTIONED CERTAIN COURSE TO THE NORTHEASTERLY
TERMINUS OF THAT COURSE AS DESCRIBED AS HAVING A BEARING AND LENGTH OF "SOUTH 62
DEGREES 04 MINUTES 30 SECONDS WEST 704.56 FEET" IN THE NORTHERLY BOUNDARY OF
THAT PARCEL OF LAND DESCRIBED AS PARCEL 1 IN DEED TO THE STATE OF CALIFORNIA,
RECORDED MAY 11, 1959, AS INSTRUMENT NO. 1870, OF OFFICIAL RECORDS, OF SAID
COUNTY; THENCE ALONG SAID LAST MENTIONED NORTHERLY BOUNDARY SOUTH 62 DEGREES 05
MINUTES 03 SECONDS WEST 704.56 FEET, SOUTH 80 DEGREES 05 MINUTES 43 SECONDS WEST
105.00 FEET AND NORTH 80 DEGREES 14 MINUTES 59 SECONDS WEST 676.33 FEET; THENCE
NORTH 9 DEGREES 45 MINUTES 01 SECONDS EAST 570.00 FEET; THENCE NORTH 25 DEGREES
20 MINUTES 00 SECONDS EAST 15.00 FEET; THENCE NORTH 8 DEGREES 44 MINUTES 49
SECONDS WEST 248.97 FEET TO THE SOUTHERLY PROLONGATION OF SAID WESTERLY LINE OF
PARCEL 1, AS SHOWN ON SAID RECORD OF SURVEY; THENCE NORTH 0 DEGREES 00 MINUTES
46 SECONDS EAST 72.14 FEET ALONG SAID PROLONGATION, TO THE POINT OF BEGINNING.

ALSO EXCEPTING THEREFROM ALL OIL, GAS AND OTHER HYDROCARBONS IN AND UNDER, OR
WHICH MAY BE PRODUCED OR SAVED FROM SAID LAND; TOGETHER WITH ALL RIGHTS OF EVERY
KIND AND DESCRIPTION WHATSOEVER TO DRILL FOR, DEVELOP, TAKE, REMOVE, AND SEVER
THE SAME, OR ANY PART THEREOF, FROM SAID LAND, WITHOUT, HOWEVER, THE RIGHT TO
THE USE OF THE SURFACE OF SAID LAND IN CONNECTION WITH THE DEVELOPMENT OR
REMOVAL OF SAID OIL, GAS OR OTHER HYDROCARBONS, ALL DRILLING AND BORING FOR SAID
PURPOSES TO BE DONE BENEATH THE SURFACE OF SAID LAND AT ANY LEVEL, OR LEVELS,
100 FEET, OR MORE, BELOW THE SURFACE THEREOF, THE SURFACE OPENING OF THE WELL
HOLE TO BE LOCATED ON LAND OTHER THAN THE LAND ABOVE DESCRIBED, AS RESERVED IN
THE DEED FROM BIXBY LAND COMPANY, A CORPORATION, RECORDED AUGUST 25, 1948 IN
BOOK 28072 PAGE 204, OFFICIAL RECORDS, AND RECORDED FEBRUARY 10, 1950 IN BOOK
32238 PAGE 67 OFFICIAL RECORDS AND RECORDED DECEMBER 28, 1950 IN BOOK 35179
PAGE 303, OFFICIAL RECORDS AND RECORDED DECEMBER 28, 1950 IN BOOK 35179 PAGE
310, OFFICIAL RECORDS.



                                 EXHIBIT "A" 
                               Page 2 of 2 Pages
<PAGE>
 
                             KILROY AIRPORT CENTER


                                  LONG BEACH


                             OFF-SITE IMPROVEMENTS



Note:  Exhibit "F" consists of a map and the following text.  The numbers
preceding each paragraph in this text refer to numbers on the map which identify
the location of the improvement.

1.  STREET DEDICATION
    -----------------

Landlord shall obtain and provide to Developer, for street improvements,
utilities, and landscaping, to be constructed by Developer to meet or exceed
City of Long Beach standards and subsequent dedication as public streets, the
easements necessary to provide access to the entire Premises on property other
than Parcel G for construction of the street tentatively identified on the map
as Kilroy Airport Center Drive, including:  (i) an area south of Spring Street
and west of Parcel G approximately 75 feet wide and approximately 420 feet long;
and (ii) an area between Parcel G and Redondo Avenue abutting the San Diego
Freeway approximately 72 feet wide and approximately 1200 feet long. Developer
shall have the right to install a landscaped divider on Kilroy Airport Center
Drive near the Spring Street intersection and to relocate existing signs and
utilities as necessary. Developer shall dedicate the land and street as
necessary on Parcel G to connect the remainder of Kilroy Airport Center Drive.



                                 EXHIBIT "F" 
                               Page 1 of 7 Pages
<PAGE>
 
2.  INTERSECTION OF SPRING STREET AND KILROY AIRPORT CENTER DRIVE
    -------------------------------------------------------------

Landlord shall obtain and provide to Developer the required approvals and
easements for access and installation by Developer the following:

2.1  Widen Spring Street
     -------------------

Widening of Spring Street to the north approximately 12 feet along a length of
approximately 600 feet, including restriping, construction of a retaining wall
and landscaping as appropriate to accommodate a second left turn lane.

2.2  Second Left Turn Lane
     ---------------------

Restriping on Spring Street on the westbound approach to provide a second
exclusive left turn lane to Kilroy Airport Center Drive.

2.3  Acceleration Lane/Bus Pull Out Lane
     -----------------------------------

A lane on the south side of South Street east of Kilroy Airport Center Drive,
approximately 12 feet wide and approximately 200 feet long.

2.4  Deceleration Lane
     -----------------

A deceleration lane on the south side of Spring Street west of Kilroy Airport
Center Drive, approximately 12 feet wide and approximately 220 feet long.



                                 EXHIBIT "F" 
                               Page 2 of 7 Pages
<PAGE>
 
2.5  Traffic Signal
     --------------

A three-phase traffic signal including a left turn phase for westbound Spring
Street Traffic turning from the two left turn lanes on Spring Street left onto
Kilroy Airport Center Drive.


3.  INTERSECTION OF REDONDO AVENUE AND KILROY AIRPORT CENTER DRIVE
    --------------------------------------------------------------

Landlord shall obtain and provide to Developer the required approvals and
easements for access and installation by Developer of the following:


3.1  Deceleration Lane
     -----------------

A deceleration lane on the east side of Redondo Avenue south of Kilroy Airport
Center Drive approximately 12 feet wide and approximately 100 feet long.


3.2  Regrade Embankment
     ------------------

Regrade the embankment adjoining the abuttment wall on the east side of Redondo
Avenue north of the San Diego Freeway overpass or install a retaining wall as
necessary to accommodate the deceleration lane.



                                  EXHIBIT "F"
                               Page 3 of 7 Pages
<PAGE>
 
3.3  Traffic Signal
     --------------

A traffic signal, to be contracted for when permits are issued for that building
which will result in an aggregate of 350,000 square feet, or more, so that the
signal will be operational approximately concurrently with expected traffic
demand.


3.4  Monument Sign
     -------------

A monument sign (at Developer's cost) similar to that depicted in the Basic
Concept Documents at the northeast corner of the intersection.


4.  INTERSECTION OF SPRING STREET AND REDONDO AVENUE
    ------------------------------------------------

Landlord shall obtain and provide to Developer the required approvals and
easements for access and installation by Developer of the following:


4.1  Second Left Turn Lane
     ---------------------

Restriping of Spring Street on the westbound approach to provide a second
exclusive left turn lane, when and if determined necessary by Landlord.



                                 EXHIBIT "F" 
                               Page 4 of 7 Pages
<PAGE>
 
4.2  Traffic Signal Rephasing
     ------------------------

Modification of the existing traffic signal to add a left turn phase for
westbound Spring Street traffic turning from the two left turn lanes left onto
Redondo Avenue, when and if determined necessary by Landlord.


5.  SCREEN WALL
    -----------

Landlord shall obtain and provide to Developer the required easements for access
and installation by Developer of approximately 3,060 lineal feet of screen wall
starting approximately 160 feet south of the south curb line of Spring Street
between the Long Beach Water Department property and the Water Department Lease
#40 property; running north replacing the existing fence to approximately 15
feet south of the curb line; then running east approximately 200 feet parallel
to and approximately 15 feet south of the curb line; then bending to the south
approximately 12 feet; then continuing east parallel to and approximately 15
feet south of the south curb line of the new deceleration lane; then running
south replacing the existing fence along the east border of Water Department
Lease #40 property and continuing south along the east border of the Water
Department Lease #38-#39 property to the north border of the California National
Guard property; then running east approximately 110 feet with an opening in the
middle at the entrance to the California National Guard property; then running
south along the east border of the



                                  EXHIBIT "F"
                               Page 5 of 7 Pages
<PAGE>
 
California National Guard property replacing the existing fence to approximately
12 feet north of the north curb line of Kilroy Airport Center Drive; then
running west parallel to and approximately 12 feet north of the curb line; and
terminating approximately 20 feet east of the east curb line of Redondo Avenue.


6.  TEMPORARY SECURITY FENCE
    ------------------------

Landlord shall provide the required access for construction by Developer of a
temporary security fence on Airport Property approximately 25 feet east of the
east boundary of Parcel G approximately 1400 feet long from Spring Street
southeast to the existing security fence at the intersection of the San Diego
Freeway and Lakewood Boulevard.


7.  LANDSCAPE AREAS
    ---------------

Landlord shall obtain and provide to Developer the required easements for access
and installation by Developer of landscaping at the following locations:


7.1  Landscape Spring Street
     -----------------------

Approximately 20 feet wide and approximately 1100 feet long on the south side of
Spring Street from the west tunnel entrance proceeding west to the northwest
corner of Water Department Lease #40 property.



                                 EXHIBIT "F" 
                               Page 6 of 7 Pages
<PAGE>
 
7.2  Landscape Redondo Avenue
     ------------------------

Approximately 40 feet deep and approximately 100 feet long at the northeast
corner of the intersection of Redondo Avenue and Kilroy Airport Center Drive.


7.3  Landscape Redondo Avenue
     ------------------------

Approximately 250 feet deep and approximately 120 feet long at the southeast
corner of the intersection of Redondo Avenue and Kilroy Airport Center Drive
between the San Diego Freeway property and Kilroy Airport Center Drive,
including the right by Developer to install landscape screening around the
existing surge tank and other equipment.


7.4  Landscape California National Guard Entry
     -----------------------------------------

Two roughly triangular parcels abutting the screen wall at the entry to the
California National Guard property, one west of the entry with an area of
approximately 2,000 square feet and the other east of the entry between the east
border of the California National Guard property and Parcel G including a radius
curb border at the north end adjacent to the California National Guard entry
with an area of approximately 7,500 square feet.



                                 EXHIBIT "F" 
                               Page 7 of 7 Pages
<PAGE>
 
                              [MAP APPEARS HERE]
<PAGE>
 
                              [MAP APPEARS HERE]
<PAGE>
 
                              [MAP APPEARS HERE]
<PAGE>
 
                              [MAP APPEARS HERE]
<PAGE>
 
                              [MAP APPEARS HERE]
<PAGE>
 
                                               BOND NO.:______
                  PERFORMANCE BOND             PREMIUM :______
                  ----------------


KNOW ALL MEN BY THESE PRESENTS, That we __________________________
______________________________, as Principal, and _________________
_______________________________________________, as Surety, are
held and firmly bound unto City of Long Beach, a Municipal Corporation (Land
Lessor) and Kilroy Long Beach Associates, a California Limited Partnership (Land
Lessee), as Obligees, in the penal sum of ____________________________________
_____________________________________ DOLLARS ($    ) lawful money of the United
States, for the payment of which sum truly to be made, we bind ourselves, our
heirs, executors, administrators, successors and assigns, jointly and severally,
firmly by these presents.

THE CONDITION OF THE OBLIGATION IS SUCH, That Whereas, the
Principal entered into a certain agreement which is hereto
attached and made a part hereof, with Kilroy Long Beach
Associates, a California Limited Partnership, dated __________________
__________________________________________, for ______________________
which contract and the specifications and general conditions thereof are hereby
incorporated herein and shall be deemed a part hereof as fully as if set out
herein.

NOW, THEREFORE, if the said Principal shall fully indemnify and save harmless
the Obligees from all loss, liability, costs, damages, penalty, attorney's fees
or expenses which Obligees may incur by reason of failure to well and truly keep
and perform each, every and all of the terms and conditions of said agreement on
the part of the said Principal to be kept and performed, including but not
limited to completion within the time specified of all work covered by said
agreement, performance of all obligation and guarantees of Kilroy Long Beach
Associates, a California Limited Partnership, relating to such work under the
contract with Kilroy Long Beach Associates, a California Limited Partnership;
then this obligation shall be of no effect, but otherwise it shall remain in
full force and effect.

It is a condition hereof that any change, alteration, modification or amendment
of any nature whatsoever that may be made in the terms of said agreement, any
change in the character or scope of the work to be performed, or the method of
performance, under said agreement or modification of said agreement or in the
time for completion thereof, any change in the manner, time or amount of payment
as provided therein, any change of any nature whatsoever that may be made in the
terms of the contract


                                 EXHIBIT "I" 

                               Page 1 of 6 Pages
<PAGE>
 
with Kilroy Long Beach Associates, a California Limited Partnership, or any
change that may be made in the performance of the work under said agreement by
the Principal, assented to by Kilroy Long Beach Associates, a California Limited
Partnership, whether made under express agreement or not, may be made without
notice to the Surety and without affecting the obligations of the Surety on this
bond and without requiring the consent of the Surety, and no such change or
changes shall release the Surety from any of its obligations hereunder, the
Surety hereby consenting to and waiving notice of any such change, alteration,
modification or amendment.

It is a further condition hereof that no one other than the named
Obligees and the successors, administrators or assigns of the
Obligees shall have any right of action under this bond.

IN WITNESS WHEREOF, the said Principal and Surety have hereunto
set their hands and seals this _________ day of ______________,
19___.
     

         ______________________________________________
                         (Principal)


         BY:___________________________________________




         ______________________________________________
                          (Surety)


         BY:___________________________________________



    Note:  The name "Kilroy Long Beach Associates, a California Limited
           Partnership" would change to the name of any successor Land Lessee.



                                 EXHIBIT "I"-

                               Page 2 of 6 Pages
<PAGE>
 
                       PAYMENT BOND          BOND NO.:_________
                       ------------          PREMIUM :_________

KNOW ALL MEN BY THESE PRESENTS, That we ________________________
__________________________ as Principal, and ___________________ 
________________________________, as Surety, are held and
firmly bound unto City of Long Beach, a Municipal Corporation (Land Lessor) and
Kilroy Long Beach Associates, a California Limited Partnership (Land Lessee), as
Obligees, in the penal sum of _________________________________________________
____________________________________ DOLLARS ($    ), lawful money of the United
States, for the payment of which sum well and truly to be made, we bind
ourselves, our heirs, executors, administrators, successors and assigns, jointly
and severally, firmly by these presents.

THE CONDITION OF THE OBLIGATION IS SUCH, That Whereas, the
Principal entered into a certain agreement which is hereto
attached and made a part hereof, with Kilroy Long Beach
Associates, a California Limited Partnership, dated ___________________________
_____________________________________, for ___________________________________
which contract and the specifications and general conditions thereof are hereby
incorporated herein and shall be deemed a part hereof as fully as if set out
herein.

NOW, THEREFORE, if the said Principal shall pay promptly and in full the claims
of all persons, firms or corporations, performing labor or furnishing equipment,
materials, or supplies incurred in connection with the contract to be performed
under said agreement and shall indemnify and save harmless of Obligees from all
loss liability, costs, damages, penalty, attorney's fees or expenses for all
taxes, insurance premiums, any and all applicable contributions, allowances or
other payments or deductions, however harmed, required by statute or union labor
agreement, including voluntary payment thereof by the Obligees necessary to
insure orderly prosecution of work or other items or services used in, upon or
for or incurred in connection with the contract to be performed under said
agreement, then this obligation shall be of no effect, but otherwise it shall
remain in full force and effect.

It is a condition hereof that any change, alteration, modification or amendment
of any nature whatsoever that may be made in the terms of said agreement, any
change in the character or scope of the work to be performed, or the method of
performance, under said agreement or any change in manner, time



                                 EXHIBIT "I" 

                               Page 3 of 6 Pages
<PAGE>
 
or amount of payment as provided therein, any change of any nature whatsoever
that may be made in the terms of the contract between Kilroy Long Beach
Associates, a California Limited Partnership, or any change that may be made in
the performance of the work under said agreement by the Principal, assented to
by Kilroy Long Beach Associates, a California Limited Partnership, whether made
under express agreement or not, may be made without notice to the Surety and
without affecting the obligations of the Surety on this bond and without
requiring the consent of the Surety and no such change or changes shall release
the Surety from any of its obligations hereunder, the Surety hereby consenting
to and waiving notice of any such change, alteration, modification or amendment.

Subject to the priority of the named Obligees with respect to recovery up to the
penal sum of this bond, persons who have supplied or furnished labor, material,
machinery, equipment or supplies to the Principal for use in the prosecution of
the work provided for in said contract shall have a direct right of action
against said Principal and Surety under this bond.

IN WITNESS WHEREOF, the said Principal and Surety have hereunto set their hands
and seals, this __________ day of ____________________________________________,
19___.


         _______________________________________
                        (Principal)


         BY:___________________________________




         _______________________________________
                          (Surety)


         BY:____________________________________



    Note:  The name "Kilroy Long Beach Associates, a California. " Limited
           Partnership would change to the name of any successor Land Lessee.



                                 EXHIBIT "I"

                               Page 4 of 6 Pages
<PAGE>
 
                   LENDER'S OBLIGEE RIDER TO PERFORMANCE BOND
                   ------------------------------------------

    WHEREAS, heretofore, on or about the ________________ day of ___________,
19___, __________________________________________________________________,
as Contractor, entered into a written agreement with Kilroy Long Beach
Associates, a California Limited Partnership, as Owner of leasehold
improvements, for the construction of ____________________________________
__________________________________________________________________________,
and

    WHEREAS, the Contractor and ____________________________________________
__________, a California corporation, as Surety, executed and delivered to
Kilroy Long Beach Associates, a California Limited Partnership, their joint and
several Performance Bond, and

    WHEREAS, Kilroy Long Beach Associates, a California Limited Partnership, has
arranged for a loan for the exclusive purpose of payment for the performance of
said contract and has requested the Contractor and Surety to join with Kilroy
Long Beach Associates, a California Limited Partnership, in the execution and
delivery of this Rider, and the Contractor and Surety have agreed so to do upon
the condition herein stated.

    NOW, THEREFORE, in consideration of one dollar and other good and valuable
consideration receipt of which is acknowledged, the undersigned agree that the
said Performance Bond shall be, and is, amended as follows:

    1.   The name of _______________________________________________________,
         as shall be added to said bond as a named Obligee.

    2.   The rights of the Lender as a named Obligee shall be subject to the
         condition precedent that Kilroy Long Beach Associates, a California
         Limited Partnership, obligations to the Contractor be performed.

    3.   The aggregate liability of the Surety under said bond to Kilroy Long
         Beach Associates, a California Limited Partnership, and the Lender, as
         their interests may appear, is limited to the penal sum of the said
         bond.

    4.   The Surety may, at its option, make any payment under said bond by
         check issued jointly to Kilroy Long Beach Associates, a California
         Limited Partnership, and the Lender.

    5.   Except as herein modified, said Performance Bond shall be and remain in
         full force and effect.



                                 EXHIBIT "I" 

                               Page 5 of 6 Pages
<PAGE>
 
    Signed, sealed and dated this _________ day of ________________,
19___.
 

                                 KILROY LONG BEACH ASSOCIATES, A
                                 California Limited Partnership

ATTEST:_______________________       BY: KILROY INDUSTRIES, a
                                     California Corporation,
                                     General Partner

                                     By: ___________________________

                                     Title: ________________________

                                 By: _______________________________

                                 By: _______________________________
                                                 (Owner)

ATTEST:_______________________   BY:________________________________
                                                 (Surety)

ATTEST:_______________________   BY:_________________________________

                                 ____________________________________    
                                            (Contractor)




                                  EXHIBIT "I"

                               Page 6 of 6 Pages
<PAGE>
 
                       KILROY AIRPORT CENTER LONG BEACH

                             CONSTRUCTION SCHEDULE

<TABLE> 
<CAPTION> 
                     Estimated Date    Estimated
                     of Commencement   Substantial
Building             of Construction   Completion Date
- --------             ---------------   ---------------   
<S>                         <C>             <C> 
First Building              9/1/85          7/31/86
Second Building             9/1/86          7/31/87
Third Building              9/1/87          7/31/88
Fourth Building             9/1/88          7/31/89
Fifth Building              9/1/89          2/28/91
Sixth Building              9/1/90          2/28/92
</TABLE> 
 



                                  EXHIBIT "J"

                               Page 1 of 1 Page
<PAGE>
 
                             FIXED BASE OPERATIONS
                             ---------------------



          This Exhibit specifies the standard responsibilities of a Fixed Base
Operation (FBO) at the Long Beach Municipal Airport.  It is the intention of the
parties that the execution of these terms shall be the responsibility of
Developer.  Nothing herein shall be deemed to prevent Developer from imposing
these requirements as a duty on its subtenants so long as Developer shall remain
primarily responsible to City therefor in case of failure of Developer and FBO
subtenants to fulfill their obligations hereunder.  Said requirements shall be
subject to the following exceptions:

          1.  Nothing herein shall be deemed to require Developer to operate any
FBO facility except through subtenants. If the FBO premises are not subleased by
Developer, Developer's sole obligation shall be to use reasonable efforts to
sublet the same upon terms and conditions reasonably satisfactory to Developer.
The temporary cessation of business operations by reason of casualty,
remodeling, holidays and other business reasons consistent with the continued
operation of such business from the FBO premises shall not constitute a 
violation of such requirements.

          2.  Developer may franchise the various elements of the FBO
operation, however, the performance requirements shall be construed to cause
construction of at least, but not more than, one fuel facility and one wash rack
on the FBO premises for each complete FBO facility, but in no event less than
one such facility or the Premises.  Developer may, however, construct more than
one fuel facility and one wash rack for each such FBO facility on the Premises.

                                                               EXHIBIT K
                                      -1-
<PAGE>
 
          3.  City and Developer shall deal directly with each other as to the
matters governed by this Exhibit, except as expressly provided to the contrary.

          4.  As used in this Exhibit, the term "Lessee" or "Tenant" shall mean
Developer and the term "Lessor" or "Landlord" shall mean City.

          5.  The provisions of this Exhibit shall be applicable only to those
portions of the Premises from time to time improved and used by or under
Developer for FBO uses, which portions are hereinafter referred to as the "FBO
Premises". Portions of the Premises initially improved and used for FBO uses may
be redeveloped and used for other purposes and portions of the Premises
initially improved and used for non-FBO uses may be redeveloped and used for FBO
uses, provided that the improved areas for aircraft tie-downs and/or hangar
space, usable for such purposes under applicable laws, in the Project are not
reduced by reason thereof. Any portion of the Premises used for non-FBO uses or
redeveloped for use other than FBO uses shall be physically segregated from the
Long Beach Municipal Airport by fencing or other barriers meeting FAA security
requirements.

          6.  References to Developer's subtenants in this Exhibit shall be
deemed references to Developer during any period of time that Developer conducts
and operates a business on or from the FBO Premises directly, and not through or
under a subtenant.

          7.  Any subtenant of Developer or transferee by sublease by or under
such a sublessee shall be deemed to be a subtenant for purposes of this Exhibit
"G". Where any such sub-

                                      -2-
<PAGE>
 
tenant performs any act or obligation required herein, Developer shall be
relieved of all obligation therefor.

          8.  Except as to matters specifically related to the operation of the
Airport or of the FBO facilities, the terms of the Lease between Developer and
City to which this Exhibit "G" is attached shall prevail in the case of any
conflict between such terms and the terms of this Exhibit "G".

          9.  Nothing in this Exhibit shall be deemed to apply to any portion of
the Project other than the FBO uses.

         10.  Nothing herein shall be deemed to require construction or
improvement of the Premises except in the manner authorized by applicable land
and airport rules.  Metal buildings, such as "Butler Buildings" shall be
permitted.

         11.  City shall endeavor in making airport improvements to minimize
interference with the operation of business on or from the Premises and shall
give reasonable notice to Developer of any duty thereon except in case of
emergency when such duty is necessary to prevent damage or injury to persons or
property.

         12.  Developer shall require its subtenants affected thereby to pay
the fuel flowage fee provided for herein for the benefit of City as a third
party beneficiary to enable City to directly enforce such requirements against
subtenants.  Developer shall not be liable for payment of such fuel flowage fees
unless Developer shall refuse upon request by City to cooperate in the
collection thereof from Developer's subtenant.  Such cooperation shall not be
construed as obligating Developer to terminate the sublease or the subtenant's
right to possession.

         13.  Sales permitted by the "use" restrictions may be
 
                                     -3-
<PAGE>
 
wholesale or retail.

          14.  Assignments or other transfers of the type described in
subparagraphs (i) through (vi) of Section 5.1.3 of this Lease or of the type
permitted by Section 1.3.3 of this Lease by subtenants shall be permitted
without the approval of City's City Manager of the assignee or transferee.
City's City Manager shall, however, be promptly notified of any such assignment
or other transfer and provided with the information described in subparagraphs
(i) and (ii) of Section 5.1.2 of this Lease.

          15.  Paragraph E of the "Operation of Business" restrictions shall not
be applicable to the rents charged and/or other services provided by or under
Developer as a sublessor.

          16.  The maintenance obligations set forth in the "Maintenance"
requirement shall be subject to and shall except reasonable wear and tear.
City's Airport Manager may not cure Developer's failures under said
"Maintenance" requirement if Developer commences such maintenance within thirty
(30) days of its receipt of written notice of such failure and thereafter
diligently prosecutes the same to completion.  Developer shall have thirty (30)
days following its receipt of written request for payments under said
"Maintenance" requirement, together with reasonable supportive evidence of the
costs incurred, to reimburse City such costs.

          17.  The last sentence in Paragraph C of the requirement entitled
"Aircraft Parking, Storage and Hangars" is hereby deleted and shall not be
applicable to the Premises.

          18.  Paragraph C of the requirement entitled "Storage"

                                      -4-
<PAGE>
 
is hereby deleted and shall not be applicable to the Premises. City's remedies
under this Lease for a default by Developer, however, shall be applicable to
breaches of the requirements of the requirement entitled "Storage", not cured
within the time provided in Section 17.6.1 following Developer's receipt of
notice of such breach.

          19.  Developer shall conclusively be deemed to have satisfied the
"Automobile Parking" requirements if Developer improves the FBO Premises in a
manner consistent with all applicable parking code requirements of the City of
Long Beach at the time of such construction.

          20.  Developer may satisfy the requirement in Paragraph B of the
requirement entitled "Fuel Flowage Fees" by having its subtenant enter into the
supplier agreement, in which event all references to Developer in Paragraph B
shall be deemed references to Developer's subtenant.  If Developer has required
its subtenants to make the reports required by Paragraph D of the requirement
entitled "Fuel Flowage Fees", Developer shall not be liable for a failure by its
subtenants to make such reports unless Developer shall refuse upon request by
City to cooperate in enforcing such reporting requirements, which cooperation
shall not be construed as obligating Developer to terminate the sublease.

          21.  The requirement entitled "Utilities" shall be enforced only
insofar as is practical.

          22.  Notwithstanding the provisions of Paragraph B of the requirement
entitled "FAA Security and Safety Regulations" to the contrary, if any sublease
includes a covenant by the sublessee to indemnify and hold City harmless for the
full amount

                                      -5-
<PAGE>
 
of any fine, penalty or other financial loss resulting from any violation of
Part 107 or Part 139 occurring on the subleased premises, or by or under such
sublessee, Developer shall not be liable to indemnify or to reimburse City for
the amount of any such fine, penalty or other financial loss covered by such
subtenant's indemnify.

          23.  Whenever the consent, approval, specification or authorization of
City, City's City Manager or the Airport Manager is required by this Exhibit,
such consent, approval, specification or authorization shall not unreasonably be
withheld.

          24.  Developer shall not be deemed to have failed to perform its
obligations under this Exhibit "G" if such failure is the result of a breach by
a subtenant under a sublease of the FBO Premises, or any portion thereof, unless
Developer fails to take reasonable action to cause such breach to be cured or to
terminate such sublease or the subtenant's right to possession within forty-five
(45) days of Developer's receipt of written notice from City of the occurrence
of such breach.

                                      -6-
<PAGE>
 
                     CONSTRUCTION, ALTERATION AND CHANGES



          LESSEE shall not place upon the Leased Premises any portable
buildings, trailers, or other like portable structures without prior written
approval of LANDLORD's Airport Manager.
                     
                                      -7-
<PAGE>
 
                                      USE
                                      ---



          The Leased Premises and any and all improvements located or erected
thereupon shall be used solely for the purpose of conducting a fixed base
operation and no other purpose.  The fixed base operation is limited to the
following aeronautical and support uses which are inclusive.

          A.  Sale of new and used aircraft (both retail and wholesale);

          B.  Sale of aircraft parts and accessories (both retail and
wholesale);

          C.  Sale of aircraft parts, components and allied equipment;

          D.  Sale of new and used avionics and electronic equipment; 

          E.  Sale of new and used aircraft instruments;

          F.  Storage, sale and dispensing of petroleum products on the Leased
Premises.

          G.  Sale of pilot supplies and accessories;

          H.  Leasing and rental of aircraft;

          I.  Sale of aircraft insurance;

          J.  Financing of aircraft;

          K.  Operation of air cargo and air freight activities (subject to
prior written approval of LANDLORD's Airport Manger;

          L.  Flight operations, including ground school, flight
training/proficiency, demonstration of aircraft for sale, charter and air taxi.
Charter/Air Taxi operations are subject to prior written approval of LANDLORD'S
Airport Manager.  The conduct of

                                      -8-
<PAGE>
 
scheduled commercial service is expressly prohibited;

          M.  Maintenance, repair, overhaul and modification of aircraft,
aircraft engines, airframes, flight systems, instruments, avionics, electronics
equipment, propellers and related aircraft components;

          N.  Rental of aircraft storage hangars and open tie-down facilities;

          0.  Operation of a UNICOM radio transmitter and receiver (subject to
written approval of LANDLORD's Airport Manager);

          P.  Washing, detailing and waxing of aircraft;

          Q.  Providing upholstery, cabinetry and interior services;

          R.  Parachute, fire extinguisher and oxygen services;

          8.  Line Services for the purpose of meeting the needs of transient
aircraft;

          T.  Operation of food vending equipment and/or a coffee bar for the
purpose of serving TENANT's employees and customers;

          U.  Rent-a-car service (subject to a prior written agreement between
LANDLORD and rent-a-car company or TENANT in the event of TENANT operated
service);

          V.  Maintenance and servicing of TENANT-owned and operated automotive
ramp equipment;

          We  Aircraft stripping and painting;

          X.  Any such other aviation related uses as may be approved in writing
by LANDLORD's Airport Manager.

                                      -9-
<PAGE>
 
                               UNAUTHORIZED USES



          Only the uses specified in the use clause hereof are authorized uses,
and such uses are authorized only when conducted by TENANT or a Subtenant
approved in advance by LANDLORD's City Manager  All other business activities
engaged in on or from the Leasehold premises for involving provision of services
or products to parties other than TENANT or an approved Subtenant for financial
gain are prohibited.  Said prohibition shall be enforced by TENANT.

                                     -10-
<PAGE>
 
                             OPERATION OF BUSINESS
                             ---------------------


          A.  TENANT shall continuously use and operate the premises, during all
usual business hours and on all such days as comparable business of like nature
in the area are open for business in accordance with the provisions of this
Lease relating to use.  If the premises are destroyed or partially condemned and
this Lease remains in full force and effect, TENANT shall continue operation of
its business at the premises to the extent reasonably practical as determined by
good business judgment during any period of reconstruction.



          B. TENANT shall appoint in writing an authorized local agent duly
empowered to make decisions on behalf of TENANT in all routine administrative
and operational matters relating to the Leased Premises who shall be available
during normal business hours. TENANT shall notify LANDLORD's Airport Manager in
writing of the name, address and telephone number of the said agent and shall
supply therewith a copy of the writing appointing the agent.



          C.  All businesses operating on or from the Leased Premises shall
maintain a suitable office which is staffed during normal business hours.



          D.  Rotary winged aircraft may not be parked, repaired or operated
from the Leased Premises without the prior written approval of the Airport
Manager and such approval, if granted, is subject to Airport Rules and
Regulations and may be terminated


                                      -11-
<PAGE>
 
by the Airport Manager on thirty (30) days notice unless otherwise specified in
writing at the time of said written approval.



          E.  Aviation services are supplied for the benefit of the aviation
public and shall be carried out in a reasonable manner and at appropriate
prices.  The Airport Manager may investigate reports of unfair prices or
service.

                                     -12-
<PAGE>
 
                              COMPLIANCE WITH LAW
                              -------------------


          No improvements or structures either permanent, temporary or portable,
shall be erected, placed upon, operated or maintained on the Leased Premises,
nor shall business or any other activity be conducted or carried on, in, onto,
or from the Leased Premises in violation of the terms of this Lease or any duly
adopted rules, regulations, orders, law, statute, by-law, or ordinance of any
governmental agency having jurisdiction thereover.


 17.                 PERFORMANCE
                     -----------

          1.  All fixed base operation facilities shall have the capacity to
store and dispense fuel.

          2.  All fixed base operation facilities shall provide an aircraft wash
rack.



                                     -13-
<PAGE>
 
                                MONTHLY REPORT
                                --------------


          Within fifteen (15) days after execution of this Lease, TENANT shall
submit a written report to LANDLORD's Airport Manager listing all based aircraft
located on the Leased Premises. Said report shall be prepared on a form supplied
by LANDLORD, and shall include for each based aircraft located on the Leased
Premises:  the make, model, registration number, color, space or hangar number,
registered owner(s) name(s), address(es) and telephone number(s).  Should
aircraft be on lease, the same information required for owner shall be provided
for any or all lesee(s) of said aircraft.

          For purposes of this section, a based aircraft is any aircraft which
makes arrangements to park at Long Beach Airport for any purpose other than
those specified herein, to wit:

          (a) Visiting or transient aircraft who utilize parking facilities for
less than fifteen (15) days in any thirty (30) day period.

          (b) Aircraft maintaining tiedown or storage space at another airport
that are undergoing maintenance, service or repair by a tenant or subtenant.

          (c) New aircraft awaiting sale and/or delivery by a tenant or
subtenant where delivery subsequent to sale occurs within thirty (30) calendar
days.

          (d) Used aircraft for sale by a tenant or subtenant where delivery
subsequent to sale occurs within thirty (30) calendar days.

                                     -14-
<PAGE>
 
                           RESERVATIONS TO LANDLORD
                           ------------------------


          LANDLORD reserves the right to enter and have access to the property
in order to make, construct or carry out airport improvements.





                           USE OF AIRPORT FACILITIES
                           -------------------------


          TENANT shall have, in conjunction with the general public and other
airport users, a non-exclusive right to the use of the public airport facilities
provided and developed by LANDLORD for public aviation use on such terms and
conditions as such facilities may be made available by LANDLORD either now or in
the future and subject to all applicable laws and rules of the United States,
the State of California or the City of Long Beach governing aviation air
navigation or the use of the airport.

                                     -15-
<PAGE>
 
                                  MAINTENANCE
                                  -----------


          TENANT agrees, at TENANT's sole cost and expense, to repair and
maintain the Leased Premises and all improvements or landscaping existing or
constructed thereon in good order and repair and to keep said premises and
facilities in a neat, clean, attractive and orderly condition.  Failure of the
TENANT to properly maintain and repair the Leased Premises shall constitute a
breach of the terms of this Lease.

          If, in the opinion of LANDLORD's Airport Manager, the Leased Premises
are not being properly maintained, LANDLORD's Airport Manager may, after giving
thirty (30) days written notice to TENANT to remedy discrepancies, cause such
repair and maintenance to be made.  The cost of such maintenance or repair shall
be added to the rent.  If said costs are not paid promptly by TENANT, this Lease
shall be deemed to be in default, and LANDLORD shall be entitled to all legal
remedies provided hereunder.

                                     -16-
<PAGE>
 
                     AIRCRAFT PARKING, STORAGE AND HANGARS
                     -------------------------------------


          A.  TENANT shall provide open aircraft parking aprons which shall be
so designed, marked and maintained, as to provide for safe and functional
parking of aircraft, including sufficient distance between all structural
elements (including, but not limited to, body, wings and tail) of parked
aircraft to permit safe movement of aircraft to and from aircraft parking
spaces. Aircraft tiedown equipment or apparatus shall be of a type approved by
the Airport Manager for use at the airport and all aircraft designed and
equipped to be tied down shall be properly secured to such tiedown apparatus
when left unattended. All tiedown spaces shall be clearly marked on the pavement
with an identification number in such manner that each individual parking space
can be easily identified.


          B.  TENANT will provide and maintain taxi lanes and aircraft parking
spaces clear of obstacles, vehicles and improperly parked aircraft in a manner
which will permit safe and convenient movement of aircraft throughout all open
parking areas.



          C.  TENANT will provide adequate aircraft parking spaces on the Leased
Premises to accommodate transient or visiting aircraft or aircraft present at
TENANT's facility for the purpose of maintenance or other work.  Parking is
permitted only in designated spaces on FBO leases and TENANT expressly covenants
and agrees to make every reasonable and prudent effort to prevent

                                     -17-
<PAGE>
 
parking of aircraft or ground vehicles on property contiguous to the Leased
Premises, but not a part thereof.  The Airport Manager may require creation of
additional parking spaces if he finds that aircraft using TENANT'S facilities
are parking in areas other than authorized tie downs or hangar spaces.



          D.  Maintenance and repair of aircraft on the based and transient
aircraft parking area shall be limited to that permitted by Federal Aviation
Regulations Part 43(h) and Appendix A(c), unless otherwise specifically
authorized in writing by the Airport Manager.  Said parking areas shall be kept
free from partially dismantled or derelict aircraft.



          E.  Aircraft storage hangars shall be used for storage of aircraft
only and no maintenance shall be done therein, except as specifically authorized
by Federal Aviation Regulations Part 43(h) and Appendix A(c) if such maintenance
and repair can be done in compliance with such fire, building and safety codes,
rules and/or regulations as may be applicable to such hangar or activity from
time to time.



          F.  Maintenance, repair and other activities may be conducted in
hangars heretofore or hereafter constructed in such manner that such maintenance
repair and other activities can be carried out in such hangar in compliance with
such fire, building and safety codes, rules and/or regulations, as may be
applicable from time to time to such activities, if authorized in writing by the
Airport Manager

                                     -18-
<PAGE>
 
such notice in writing as is possible under the existing circumstances.



          C. LANDLORD will cause the surface of the Leased Premises to be
restored to its original condition upon the completion of any construction done
pursuant to this paragraph.




          E.  LANDLORD shall exercise its best effort to avoid unreasonable
interference with TENANT's operations or enjoyment of the premises or impairment
of the security of any secured creditor in its exercise of rights pursuant to
this paragraph.



          F.  Should any exercise of the rights described in this paragraph
result in a significant interference with TENANT's use of the Leased Premises,
LANDLORD shall provide compensation to TENANT by means of a reduction in rent
proportionate to the amount of the interference which shall continue for not
more than two months or until TENANT has been adequately compensated, whichever
comes first.

                                     -19-
<PAGE>
 
          G.  All aircraft service, maintenance, repair, inspection and building
activities conducted for financial gain within or from aircraft storage hangars
shall be done by fixed based operators, tenants or sub-tenants located on the
Long Beach Municipal Airport or their duly authorized personnel.  No other
persons may perform such work.



          H.  Parking spaces in storage hangars shall be marked, numbered and
designed in the manner specified in subparagraph A of this paragraph for tie
down spaces.



          I.  The aircraft identification number of each aircraft parked in a
hangar shall be affixed to the outside of such hangar in a convenient and
plainly visible manner and said information shall be revised from time to time
so that it shall be current and visible at all times.



          J.  Aircraft hangars constructed after the date of execution of this
Lease shall be so designed and constructed by mean of a method approved by the
Airport Manager as to permit verification for identification, safety and
security purposes of all aircraft parked therein at all times without
compromising the security of such aircraft.

                                     -20-
<PAGE>
 
                AIRCRAFT TIEDOWN AND STORAGE HANGAR AGREEMENTS
                ----------------------------------------------


          TENANT is authorized to enter into sublease agreements to permit
aircraft tiedown and storage on the Leased Premises without approval of
LANDLORD, provided that TENANT shall enter into and maintain current a written
Aircraft Tiedown or Aircraft Storage Hangar Agreement with the owner or lessee
or operator of each aircraft renting space on the Leased Premises.  Such
agreements shall be in writing and shall specify all terms, conditions and
restrictions relating to the rental of space for the tiedown or storage of
TENANT's aircraft and indicating that said owner, operator or lessee of an
aircraft to be tied down or stored is a subtenant of LANDLORD as well as TENANT
by virtue of the creation of this sublease.  Such agreement shall also require
that the information which TENANT must provide to LANDLORD to the terms of
Paragraph *_____ of this Lease shall be supplied to TENANT by any parties with
whom TENANT has entered such agreements. LANDLORD's Airport Manager or his
designated representative may inspect TENANT's file of Aircraft Tiedown and
Storage Hangar Rental Agreements at any reasonable time during TENANT's regular
business hours.



*Page 14 of this Exhibit "G"

                                     -21-
<PAGE>
 
                                    STORAGE
                                    -------


          A.  TENANT may store aircraft components, equipment, parts, bulk
liquids, scrap lumber, metal, machinery or other materials related to the
conduct of its business on the Leased Premises, provided, however, that such
storage may be one only within a fully enclosed permanent structure.  No storage
may be done on any apron, ramp or taxiway, without prior written approval of
Airport Manager.



          B.  Derelict aircraft, inoperative grounded vehicles, unused ramp
equipment, scaffolding, hoists and related items not regularly and routinely in
use as part of TENANT's business, may not be kept on the Leased Premises unless
such materials are maintained within a fully enclosed permanent structure.



          C.  Violation of the requirements of this Paragraph shall be deemed in
default if the condition has not been cured to the satisfaction of the Airport
Manager within thirty (30) days of posting of the property or service of TENANT
with a notice thereof.

                                     -22-
<PAGE>
 
                              AUTOMOBILE PARKING
                              ------------------


          TENANT agrees to provide sufficient automobile parking on the Leased
Premises to accommodate the parking needs of patrons, visitors and employees,
provided, however, that Airport streets and access roadways may not be utilized
to comply with this requirement.

                                     -23-
<PAGE>
 
                               FUEL FLOWAGE FEES
                               -----------------


          A.  REQUIREMENT TO PAY
              ------------------

          TENANT agrees to pay such fuel flowage fees at such rates as may be
regularly established from time to time by LANDLORD's City Council for aircraft
fuels delivered at the airport. Such fees shall be due and payable on the tenth
(10th) day of the month succeeding that in which the aircraft fees are received
by TENANT.  The fees shall be calculated and administered as provided herein.



          B.  SUPPLIER AGREEMENT.
              ------------------

          TENANT shall enter into a written agreement with its fuel supplier
which recognizes the existence of the provisions of this agreement.  A copy of
said agreement shall be delivered to LANDLORD's Airport Manager prior to the
commencement of fuel delivery.  Said agreement shall provide that either TENANT
or TENANT's supplier shall indemnify, hold harmless and provide insurance
coverage to the City for all uses arising from the delivery, storage, sale and
supplying of such fuel.  Such agreement shall further provide that the supplier
shall make available to the City at reasonable times, its records of
transactions involving delivery of fuel to TENANT for purposes of auditing
TENANT's performance under this agreement.



          C.  UNDERGROUND STORAGE AND DELIVERY.
              --------------------------------

          All fuel delivered to TENANT by its supplier or suppliers shall be
placed into underground storage facilities, the

                                     -24-
<PAGE>
 
location and design of which shall have been approved by LANDLORD's Airport
Manager and all fuel delivered by any supplier or suppliers shall be placed
directly into said approved underground storage facilities.



          D.  REPORTING, PAYMENT AND STATEMENTS.
              ---------------------------------

          Deliveries of fuel shall be reported and fees therefor paid by TENANT
to LANDLORD each calendar month as provided herein. The fees to be paid shall be
computed on the basis of the oil company's meter tickets supplied by the tanker
truck holding the delivery from, or from refinery meter tickets provided to the
carrier at the time the tanker truck is loaded.  The amount shown on such
tickets to have been delivered in agreement shall be multiplied by the rate
established by the City Council then in effect.  The product of that computation
shall be the fuel flowage fee due for that month.  TENANT will provide a year-
end statement showing all deliveries in the previous year.  Both monthly reports
and year-end statements shall be on forms supplied by the Airport Manager

                                     -25-
<PAGE>
 
                                NOISE ABATEMENT
                                ---------------


          TENANT expressly covenants to make every reasonable and prudent effort
to ensure that aircraft based on, or operating from, the Leased Premises adhere
to duly adopted present and future Noise Abatement Programs and Rules and
Regulations relating thereto.









                              NAVIGATION EASEMENT
                              -------------------


          There is hereby excepted and reserved to the City of Long Beach, its
successors and assigns, for the use and benefit of the public, a right of flight
for the passage of aircraft in the airspace above the surface of the premises
herein leased.  This public right of flight shall include the right to cause in
said airspace any noise inherent in the operation of any aircraft used for
navigation or flight through said airspace or landing at, taking off from or
operation on the Long Beach Municipal Airport.   The easement hereby excepted
and reserved shall not limit any improvements and other structures heretofore or
hereafter constructed or placed upon the premises in a manner consistent with
the applicable PD-2 zoning ordinance of the City of Long Beach and FAR Part 77

                                     -26-
<PAGE>
 
                                 BULLETIN BOARD
                                 --------------


          TENANT will install and continuously maintain a bulletin board in a
location on the Leased Premises which will be convenient to and easily seen by
patrons, users and visitors and will post and display notices, bulletins and
other information supplied by the Airport Manager in a prominent place where
such will be easily visible to TENANT's employees, patrons, users and visitors,
or will authorize the Airport Manager to post such notices which shall remain
continuously on display for such period of time as the same may continue in
effect.



                                   UTILITIES
                                   ---------


          All utilities added from or after the date of this Lease shall be
underground.

                                     -27-
<PAGE>
 
                                 WASTE DISPOSAL
                                 --------------


          TENANT shall construct all facilities necessary to prevent any water
or industrial waste from the operations of TENANT on the Leased Premises from
flowing into adjacent property.  TENANT shall dispose of all sewage and
industrial waste in accordance with all applicable regulations and laws of those
governmental agencies having jurisdiction or authority thereover.

          TENANT shall insure that all solid waste materials are placed in
appropriate covered containers designed for use with the type of waste involved,
which shall remain covered, and that said containers are maintained within
enclosures located on said Leased Premises and designated to keep said trash
containers out of the flow of traffic and obscured from view.

                                     -28-
<PAGE>
 
                      FAA SECURITY AND SAFETY REGULATIONS
                      -----------------------------------


          A.  This Lease is subject to Federal Aviation Regulations Part 107 and
Part 139 relating to Safety and Security.  LANDLORD shall provide copies thereof
to TENANT who shall provide copies thereof to all sub-tenants.



          B.  If any violation of Part 107 or Part 139 occurs on the Leased
Premises, TENANT or its sub-tenants shall be strictly liable to reimburse
LANDLORD for the full amount of any fine, penalty or other financial loss
resulting therefrom.



                             BILLBOARDS AND SIGNS
                             --------------------


          TENANT agrees not to construct, install or maintain, nor to allow upon
the Leased Premises any billboards, signs, banners or like displays which may be
placed in or upon any building or structure in such manner as to be visible from
the outside thereof, except those approved in writing by LANDLORD's Airport
Manager.   

                                     -29-
<PAGE>
 
                                     AUDIT
                                     -----


          The LANDLORD, City Auditor and City Manager, or their designated
representatives, shall be permitted to examine and review TENANT's records at
all reasonable times, with or without prior notification, for the purpose of
determining compliance with all terms, covenants and conditions of this Lease.
Such examinations and reviews shall be conducted during TENANT's regular
business hours in a manner causing as little inconvenience as possible to
TENANT.

                                     -30-
<PAGE>
 
                              POSSESSORY INTEREST
                              -------------------


          TENANT recognizes and understands that this Lease may create a
possessory interest subject to property taxation and that TENANT may be subject
to the payment of property taxes on such interest.






                  FEDERAL AVIATION ADMINISTRATION ASSURANCES
                  ------------------------------------------


          This Lease is subject to certain assurances mandated by the Federal
Aviation Administration for inclusion in airport leases.  These assurances are
set out in full in Exhibit "H" attached hereto and made a part hereof.

                                     -31-
<PAGE>
 
                         FAA REQUIRED LEASE PROVISIONS
                         -----------------------------


LEASE PROVISIONS:
- ----------------

1. The Lessee, for himself, his heirs, personal representatives, successors in
interest, and assigns, as a part of the consideration hereof, does hereby
covenant and agree "as a covenant running with the land") that in the event
facilities are constructed, maintained, or otherwise operated on the said
property described in this Lease, for a purpose for which a DOT program or
activity is (Pounds) extended or for another purpose involving the provision of
similar services or benefits, the Lessee shall maintain and operate such
facilities and services in compliance with all other requirements imposed
pursuant to Title 49, Code of Federal Regulations, DOT, Subtitle A, Office of
the Secretary, Part 21, Nondiscrimination in Federally-Assisted Programs of the
Department of Transportation-Effectuation of Title VI of the Civil Rights Act of
1964, and as said Regulations may be amended.

2.  The Lessee for himself, his personal representatives, successors in
interest, and assigns, as a part of the consideration hereof, does hereby
covenant and agree "as a covenant running with the land" that:  (a) no person on
the grounds of race, color or national origin shall be excluded from
participation in, denied the benefits of, or be otherwise subjected to
discrimination in the use of said facilities; (b) that in the construction of
any improvements on, over, or under such land and the furnishing of services
thereon, no person on the grounds of race, color or national origin shall be
excluded from participation in, denied the benefits of, or otherwise be subject
to discrimination; (c) that the Lessee shall use the premises in compliance with
all other requirements imposed by or pursuant to Title 49, Code of Federal
Regulations, Department of Transportation, Subtitle A, Office of the Secretary,
Part 21, Nondiscrimination in Federally-Assisted Programs of the Department of
Transportation-Effectuation of Title VI of the Civil Rights Act of 1964, and as
said Regulations may be amended.

3.  Lessee shall furnish its accommodations and/or services on a fair, equal and
not unjustly discriminatory basis to all users thereof and it shall charge fair,
reasonable and not unjustly discriminatory prices for each unit or service;
PROVIDED, THAT the Lessee may be allowed to make reasonable and
nondiscriminatory discounts, rebates or other similar type of price reductions
to volume purchasers.

4.  Non-compliance with Provision 3 above shall constitute a material breach
thereof and in the event of such non-compliance and Lessor shall have the right
to terminate this Lease Agreement and the estate hereby created without
liability therefore or at the election of

                                      -1-
                                                          EXHIBIT L
<PAGE>
 
the Lessor or the United States either or both said Governments shall have the
right to judicially enforce Provisions.

5.  Lessee agrees that it shall insert the above four Provisions in any Lease
Agreement by which said Lessee grants a right or privilege to any person, firm
or corporation to render accommodations and/or services to the public on the
premises herein leased.

6.  The Lessee assures that it will undertake an affirmative action program as
required by 14 CFR Part 152, Subpart E, to insure that no person shall on the
grounds of race, creed, color, national origin, or sex be excluded from
participating in any employment activities covered in 14 CFR Part 152, Subpart
E.  The Lessee assures that no person shall be excluded on these grounds from
participating in or receiving the services or benefits of any program or
activity covered by this subpart.  The Lessee assures that it will require that
its covered suborganizations provide assurances to the Lessee that they
similarly will undertake affirmative action programs and that they will require
assurances from their suborganizations, as required by 14 CFR Part 152, Subpart
E, to the same effect.

7.  The Lessor reserves the right to further develop or improve the landing area
of the airport as it sees fit, regardless of the desires or view of the Lessee,
and without interference or hinderance.

8.  The Lessor reserves the right, abut shall not be obligated to the Lessee to
maintain and keep in repair the landing area of the airport and all publicly-
owned facilities of the airport, together with the right to direct and control
all activities of the Lessee in this regard.

9.  This Lease shall be subordinate to the provisions and requirements of any
existing or future agreement between the Lessor and the United States, relative
to the development, operation or maintenance of the airport.

10.  Lessee agrees to comply with the notification and review requirements
covered in Part 77 of the Federal Aviation Regulations in the event of future
construction of a building is planned for the leased premises, or in the event
of any planned modification or alteration of any present or future building or
structures situated on the leased premises.

11.  It is understood and agreed that nothing herein contained shall be
construed to grant or authorize the granting of an exclusive right within the
meaning of Section 308 of the Federal Aviation Act.

12.  The Lessee by accepting this Lease agrees for itself, its successors and
assigns that it will not make use of the leased premises in any manner which
might interfere with the landing and

                                      -2-
<PAGE>
 
taking off of aircraft from Long Beach Municipal Airport or otherwise constitute
a hazard. In the event the aforesaid covenant is breached, the owner reserves
the right to enter upon the premises hereby leased, and cause the abatement of
such interference at the expense of the Lessee.

13.  This Lease and all the provisions hereof shall be subject to whatever right
the United States Government now has or in the future may have or acquire,
affecting the control, operation, regulation and taking over of said airport.

                                      -3-
<PAGE>
 
Recording Requested By:



When Recorded Mail To:



                            SHORT FORM GROUND LEASE
                            -----------------------


    THIS SHORT FORM GROUND LEASE is made and entered into as of this ______ day
of ________________, 198__, by and between the CITY OF LONG BEACH, a municipal
corporation ("Landlord"), and KILROY LONG BEACH ASSOCIATES, a California Limited
Partnership ("Developer").


                                   R E C I T A L S
                                   - - - - - - - -

    Landlord does hereby lease and demise to Developer that certain real
property in the City of Long Beach, County of Los Angeles, State of California,
more particularly described in Exhibit "A" attached hereto and all rights,
privileges and easements appurtenant thereto ("Premises" herein) pursuant to and
upon all of the terms, covenants and provisions set forth in that certain
unrecorded Ground Lease dated ____________________________________, ("Ground
Lease" herein), the terms, covenants and provisions of which are hereby
incorporated herein and made a part hereof by reference.



                                  EXHIBIT "M"
                               Page l of 5 Pages
LBAC-3A/5.28.6.sr
<PAGE>
 
    Landlord and Developer do further agree as follows:


    1.  The commencement date of the Ground Lease term is the date first written
above.


    2. The term of the Ground Lease shall continue for fifty (50) years
following the date of execution of the Ground Lease, subject to earlier
termination as provided in the Ground Lease and subject to four (4) successive
ten (10) year options and one (1) nine (9) year option to further extend the
term of the Ground Lease.


    3. Developer shall have the right to subdivide the Ground Lease into one or
more separate Ground Leases pursuant to Section 7.6 of the Ground Lease and to
recombine one or more separate Ground Lease into a single Ground Lease pursuant
to Section 7.7 of the Ground Lease. Developer also shall have the right to
encumber its leasehold interest in the Ground Lease (and in each separate Ground
Lease into which the Ground Lease may be subdivided) with one or more Leasehold
Mortgages (as defined in section 4.3.2 of the Ground Lease) in favor of one or
more Leasehold Mortgagees (as defined in section 4.3.3 of the Ground Lease).


    4.  Developer shall pay the real property taxes and assessments against the
Premises during the term hereof, as more specifically provided in the Ground
Lease.


    5.  Notwithstanding that the ownership of Landlord's and Developer's estates
in and to the Premises may become vested in


                                  EXHIBIT "M"
                               Page 2 of 5 Pages
LBAC-3A/5.28.6.sr
<PAGE>
 
the same party for any reason, no merger of Developer's leasehold estate into
Landlord's fee title shall result or be deemed to result thereby, as provided in
Section 4.20 of the Ground Lease, provided that this provision shall not be
deemed applicable to  a termination of Developer's leasehold estate by reason of
Developer's default or a taking under the power of eminent domain.


    6.  The Ground Lease grants to Developer the right to enter upon the
Premises demised thereby for a period of sixty (60) days following the
expiration of the term of the Ground Lease in order to remove any or all of the
buildings and other improvements constructed upon said Premises by or under
Developer.


    7.  The Ground Lease grants to Developer the right to sell any buildings
from time to time constructed upon the Premises, provided that such buildings
shall be and remain subject to the terms and conditions of the Lease and shall
be used and developed only in accordance with the Ground Lease for so long as
such buildings remain upon the Premises.








                     [THIS AREA INTENTIONALLY LEFT BLANK]



                                  EXHIBIT "M"
                               Page 3 of 5 Pages
LBAC-3A/5.28.6.sr
<PAGE>
 
    IN WITNESS WHEREOF, the parties have executed this Short Form Ground Lease
as of the day and year first above written.


                                  CITY OF LONG BEACH,

                                  A Municipal Corporation


                                  By:__________________________


                                  Title:_______________________

                                              "Landlord"


                                  KILROY LONG BEACH ASSOCIATES,

                                  a California Limited Partnership,


                                  By:  KILROY INDUSTRIES, a

                                       California Corporation, 
                                     
                                       General Partner


                                       By:________________________


                                         Title:___________________


                                       By:________________________



                                       By:________________________

                                                "Developer"



                                  EXHIBIT "M"
                              Page 4 of 5 Pages 

LBAC-3A/5.28.6.sr
<PAGE>
 
           This Short Form Ground Lease is hereby approved as to form
this ______________ day of ______________, 198__.



                                    ROBERT W. PARKIN, City Attorney



                                    By:____________________________
 
                                                  Deputy



                                  EXHIBIT "M"
                               Page 5 of 5 Pages

LBAC-3A/5.28.6.sr
<PAGE>
 
                           LANDLORD'S ACKNOWLEDGMENT
                           -------------------------
                                 Corporation 
                                 -----------



STATE OF CALIFORNIA    )
                       )  ss.
COUNTY OF LOS ANGELES  )

    On June ___, 1985, before me, the undersigned, a Notary Public in and for
said State, personally appeared _______________________________ personally known
to me or proved to me on the basis of satisfactory evidence to be the person who
executed the within instrument as the ________________________ , on behalf of
the City of Long Beach, the Municipal corporation that executed the within
instrument and acknowledged to me that said Municipal corporation executed the
within instrument pursuant to a resolution of its City Council.

WITNESS my hand and official seal.



                                  ------------------------------------
                                  Notary Public in and for said State


SEAL
<PAGE>
 
                           DEVELOPER'S ACKNOWLEDGMENT



STATE OF CALIFORNIA    )
                       )  ss.
COUNTY OF LOS ANGELES  )

    On June ____, 1985, before me, the undersigned, a Notary Public in and for
said State, personally appeared ________________________________ and
_____________________, personally known to me or proved to me on the basis of
satisfactory evidence to be the persons who executed this instrument as
__________________ and _________________________________, respectively, of
Kilroy Industries, the corporation that executed this instrument as one of the
general partners of Kilroy Long Beach Associates, a California Limited
Partnership, the partnership that executed the within instrument, and
acknowledged to me that such corporation executed the same as such partner and
that said partnership executed the same.

WITNESS my hand and official seal.



                                  ------------------------------------
                                  Notary Public in and for said State


SEAL
<PAGE>
 
                               LEGAL DESCRIPTION
                               -----------------


THAT PORTION OF PARCEL 1, IN THE CITY OF LONG BEACH, IN THE COUNTY OF LOS
ANGELES, STATE OF CALIFORNIA, AS SHOWN ON A RECORD OF SURVEY, FILED IN BOOK 85,
PAGE 19, OF RECORD OF SURVEYS, IN THE OFFICE OF THE COUNTY RECORDER OF SAID
COUNTY, TOGETHER WITH THOSE PORTIONS OF LOTS 5 AND 9, TRACT NO. 10548, IN SAID
CITY, COUNTY OF STATE, AS PER MAP RECORDED IN BOOK 174, PAGES 15 TO 23,
INCLUSIVE OF MAPS, IN SAID RECORDER'S OFFICE, AND TOGETHER WITH THAT PORTION OF
LAKEWOOD BOULEVARD (FORMERLY KNOWN AS CERRITOS AVENUE, 80 FEET WIDE) AS SHOWN ON
SAID MAP OF TRACT NO. 10548, NOW VACATED BY THE STATE OF CALIFORNIA HIGHWAY
COMMISSION, A CERTIFIED COPY OF WHICH WAS RECORDED MAY 19, 1959, AS INSTRUMENT
NO. 3601, OF OFFICIAL RECORDS, IN THE OFFICE OF SAID COUNTY RECORDER, DESCRIBED
AS A WHOLE AS FOLLOWS:

BEGINNING AT THE MOST SOUTHERLY CORNER OF SAID PARCEL 1, SAID RECORD OF SURVEY;
THENCE NORTH 00 DEGREES 00 MINUTES 46 SECONDS EAST 324.60 FEET, ALONG THE
WESTERLY LINE OF SAID PARCEL 1, TO THE NORTHWESTERLY CORNER OF SAID PARCEL 1,
SAID NORTHWESTERLY CORNER BEING A POINT IN A NON-TANGENT CURVE CONCAVE NORTHERLY
AND HAVING A RADIUS OF 1,050.00 FEET, A RADIAL LINE THAT BEARS SOUTH 2 DEGREES
06 MINUTES 54 SECONDS WEST TO SAID POINT, SAID CURVE ALSO BEING THE NORTHERLY
LINE OF SAID PARCEL 1; THENCE EASTERLY ALONG SAID CURVE THROUGH A CENTRAL ANGLE
OF 27 DEGREES 32 MINUTES 10 SECONDS AN ARC DISTANCE OF 504.63 FEET TO A POINT,
SAID LAST MENTIONED POINT BEING A RADIAL LINE THAT BEARS SOUTH 25 DEGREES 25
MINUTES 16 SECONDS EAST, TO SAID LAST MENTIONED POINT; THENCE SOUTH 45 DEGREES
22 MINUTES 59 SECONDS EAST 1,403.34 FEET TO A POINT IN THAT CERTAIN COURSE AS
DESCRIBED AS HAVING A BEARING AND LENGTH OF "SOUTH 34 DEGREES 15 MINUTES 50
SECONDS WEST 225.46 FEET" IN THE NORTHWESTERLY BOUNDARY OF THAT PARCEL OF LAND
DESCRIBED AS PARCEL l IN DEED TO STATE OF CALIFORNIA, RECORDED MARCH 18, 1959,
AS INSTRUMENT NO. 1904, OF OFFICIAL RECORDS, OF SAID COUNTY, SAID LAST MENTIONED
POINT BEING NORTH 34 DEGREES 16 MINUTES 23 SECONDS EAST 40.81 FEET, ALONG SAID
COURSE, FROM THE SOUTHWESTERLY TERMINUS THEREOF; THENCE SOUTH 34 DEGREES 16
MINUTES 23 SECONDS WEST 40.81 FEET, ALONG SAID COURSE, TO THE NORTHEASTERLY
TERMINUS OF THAT CERTAIN COURSE IN SAID NORTHWESTERLY BOUNDARY, AS DESCRIBED IN
SAID LAST MENTIONED PARCEL 1, AS HAVING A BEARING AND LENGTH OF "SOUTH 62
DEGREES 04 MINUTES 30 SECONDS WEST, 51.05 FEET, MORE OR LESS,"; THENCE SOUTH 62
DEGREES 05 MINUTES 03 SECONDS WEST ALONG SAID LAST MENTIONED CERTAIN COURSE, TO
THE NORTHEASTERLY TERMINUS OF THAT CERTAIN COURSE AS DESCRIBED AS HAVING A
BEARING AND LENGTH OF "SOUTH 62



                                  EXHIBIT "A"

                               Page l of 2 Pages

LBAC-3A/5 .24. 7/sr
<PAGE>
 
DEGREES 04 MINUTES 30 SECONDS WEST, 113.28 FEET" IN SAID LAKEWOOD BOULEVARD, NOW
VACATED BY THE CALIFORNIA HIGHWAY COMMISSION; THENCE SOUTH 62 DEGREES 05 MINUTES
03 SECONDS WEST ALONG SAID LAST MENTIONED CERTAIN COURSE TO THE NORTHEASTERLY
TERMINUS OF THAT COURSE AS DESCRIBED AS HAVING A BEARING AND LENGTH OF "SOUTH 62
DEGREES 04 MINUTES 30 SECONDS WEST 704.56 FEET" IN THE NORTHERLY BOUNDARY OF
THAT PARCEL OF LAND DESCRIBED AS PARCEL l IN DEED TO THE STATE OF CALIFORNIA,
RECORDED MAY 11, 1959, AS INSTRUMENT NO. 1870, OF OFFICIAL RECORDS, OF SAID
COUNTY; THENCE ALONG SAID LAST MENTIONED NORTHERLY BOUNDARY SOUTH 62 DEGREES 05
MINUTES 03 SECONDS WEST 704.56 FEET, SOUTH 80 DEGREES 05 MINUTES 43 SECONDS WEST
105.00 FEET AND NORTH 80 DEGREES 14 MINUTES 59 SECONDS WEST 676.33 FEET; THENCE
NORTH 9 DEGREES 45 MINUTES 0l SECONDS EAST 570.00 FEET; THENCE NORTH 25 DEGREES
20 MINUTES 00 SECONDS EAST 15.00 FEET; THENCE NORTH 8 DEGREES 44 MINUTES 49
SECONDS WEST 248.97 FEET TO THE SOUTHERLY PROLONGATION OF SAID WESTERLY LINE OF
PARCEL 1, AS SHOWN ON SAID RECORD OF SURVEY; THENCE NORTH 0 DEGREES 00 MINUTES
46 SECONDS EAST 72.14 FEET ALONG SAID PROLONGATION, TO THE POINT OF BEGINNING.

ALSO EXCEPTING THEREFROM ALL OIL, GAS AND OTHER HYDROCARBONS IN AND UNDER, OR
WHICH MAY BE PRODUCED OR SAVED FROM SAID LAND; TOGETHER WITH ALL RIGHTS OF EVERY
KIND AND DESCRIPTION WHATSOEVER TO DRILL FOR, DEVELOP, TAKE, REMOVE, AND SEVER
THE SAME, OR ANY PART THEREOF, FROM SAID LAND, WITHOUT, HOWEVER, THE RIGHT TO
THE USE OF THE SURFACE OF SAID LAND IN CONNECTION WITH THE DEVELOPMENT OR
REMOVAL OF SAID OIL, GAS OR OTHER HYDROCARBONS, ALL DRILLING AND BORING FOR SAID
PURPOSES TO BE DONE BENEATH THE SURFACE OF SAID LAND AT ANY LEVEL, OR LEVELS,
100 FEET, OR MORE, BELOW THE SURFACE THEREOF, THE SURFACE OPENING OF THE WELL
HOLE TO BE LOCATED ON LAND OTHER THAN THE LAND ABOVE DESCRIBED, AS RESERVED IN
THE DEED FROM BIXBY LAND COMPANY, A CORPORATION, RECORDED AUGUST 25, 1948 IN
BOOK 28072 PAGE 204, OFFICIAL RECORDS, AND RECORDED FEBRUARY 10, 1950 IN BOOK
32238 PAGE 67 OFFICIAL RECORDS AND RECORDED DECEMBER 28, 1950 IN BOOK 35179 PAGE
303, OFFICIAL RECORDS AND RECORDED DECEMBER 28, 1950 IN BOOK 35179 PAGE 310,
OFFICIAL RECORDS.



                                  EXHIBIT "A"

                               Page 2 of 2 Pages

LBAC-3A/5.24.7/sr

<PAGE>
 
                                                                   EXHIBIT 10.11
                                                              
                         LONG BEACH MUNICIPAL AIRPORT



                                LEASE AGREEMENT





                         KILROY LONG BEACH ASSOCIATES

                       a California Limited Partnership

                                  "DEVELOPER"




                         BOARD OF WATER COMMISSIONERS 

                              CITY OF LONG BEACH

                                  "LANDLORD"
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
<TABLE> 
<CAPTION> 
                                                                            Page
                                                                            ----
<S>                                                                         <C>
1.  SUBJECT OF LEASE........................................................   1
      1.1    Purpose of Lease...............................................   1
      1.2    Lease of Premises..............................................   1
      1.3    The Project Area...............................................   2
      1.4    The Premises...................................................   2
      1.5    Parties to the Lease Agreement.................................   2
               1.5.1   Landlord.............................................   2
               1.5.2   Developer............................................   2
               1.5.3   Association by Developer.............................   3
      1.6    Existing Lease from the City of Long Beach.....................   4

2.  TERM....................................................................   4
      2.1    Basic Term.....................................................   4
      2.2    Options for Extensions.........................................   4

3.  RENT....................................................................   5
      3.1    Minimum Ground Rent............................................   5
               3.1.1   Initial Ground Rent - Parcel A.......................   5
               3.1.2   Initial Ground Rent - Parcel B.......................   6
                 3.1.2.1  Parcel A..........................................   6
                 3.1.2.2  Parcel B..........................................   6
                 3.1.2.3  CPI Adjustments to Initial
                            Ground Rent.....................................   7
                 3.1.2.4  Additional Adjustment to Initial
                            Ground Rent for Parcel B........................   7
               3.1.3   Commencement of Initial Ground Rent..................   9
               3.1.4   Phasing of Initial Ground Rent.......................   9
                 3.1.4.1  Parcel A..........................................  10
                 3.1.4.2  Parcel B..........................................  10
               3.1.5    Delays in Commencement of Ground Rent...............  10
               3.1.6    Due Dates and Place of Payment......................  11
               3.1.7    Ground Rent Credit for Extraordinary Costs..........  11
                 3.1.7.1  Limitations.......................................  12
                 3.1.7.2  Approval of Costs.................................  12
      3.2    Ground Rent Adjustments........................................  13
               3.2.1   Adjustment Dates.....................................  13
               3.2.2   Ground Rent Adjustments by Appraisal.................  13
                 3.2.2.1  Adjustments for Off-Site Costs....................  14
               3.2.3   Appraisal............................................  15
                 3.2.3.1  Prevailing Rate of Return.........................  16
               3.2.4   Maximum Rent Increase................................  17
                 3.2.4.1  Allocation to Parcels.............................  17
</TABLE>                 

                                       i
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                  (continued)
<TABLE> 
<CAPTION> 
                                                                            Page
                                                                            ----
<S>                                                                         <C>
                 3.2.4.2  Base Sublease Rental..............................  17
                 3.2.4.3  Sublease Rental Percentage Change.................  18
                 3.2.4.4  Adjusted Ground Rent..............................  18
                 3.2.4.5  Sale or Assignment of Leasehold Interest..........  19
      3.3    Ground Rent Adjustments Following Reconstruction...............  19
               3.3.1   Ground Rent Adjustments..............................  20
                 3.3.1.1  Adjustment Date...................................  20
                 3.3.1.2  Alternate Adjustment Date.........................  20
               3.3.2   No Adjustment At Next Scheduled
                         Adjustment Date....................................  20
               3.3.3   Maximum Ground Rent Adjustment.......................  21
      3.4    Adjustments to Ground Rent During Option Term..................  21
      3.5    Maximum Ground Rent Increase...................................  21
      3.6    Definition of Offsite Costs....................................  22
      3.7    Approval of Improvement Plans..................................  22
      3.8    Determination of Offsite Costs.................................  22
      3.9    Construction by Landlord.......................................  24
      3.10   Phasing of Improvements........................................  24

4.  LEASEHOLD MORTGAGES.....................................................  24
      4.1    Leasehold Mortgage Authorized..................................  24
      4.2    Notice to Landlord.............................................  24
               4.2.1   Leasehold Mortgage Requirements......................  24
               4.2.2   Assignment of Leasehold Mortgage.....................  25
               4.2.3   Landlord's Acknowledgment of Notice..................  25
               4.2.4   Developer to Provide Copies..........................  26
      4.3    Definitions....................................................  26
               4.3.1   Institutional Lender.................................  26
               4.3.2   Leasehold Mortgage...................................  27
               4.3.3   Leasehold Mortgagee..................................  27
      4.4    Consent of Leasehold Mortgagee Required........................  27
      4.5    Default Notice.................................................  27
      4.6    Notice to Leasehold Mortgagee..................................  28
               4.6.1   Landlord's Termination Notice........................  28
</TABLE>
                                       ii
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                  (continued)
<TABLE> 
<CAPTION> 
                                                                            Page
                                                                            ----
<S>                                                                         <C>
               4.6.2   Proper Address of Leasehold Mortgagee................  30
      4.7    Procedure on Default...........................................  30
               4.7.1   Extension of Termination Notice Period...............  30
                 4.7.1.1  Payment of Monetary Obligations...................  30
                 4.7.1.2  Foreclosure of Leasehold Mortgage.................  31
               4.7.2   Cure of Default......................................  31
               4.7.3   Compliance of Leasehold Mortgagee....................  32
               4.7.4   Leasehold Mortgage Not an Assignment.................  32
               4.7.5   Obligation of Leasehold Mortgagee
                         to Repair or Reconstruct...........................  33
               4.7.6   Leasehold to Mortgagee's Right to
                         Transfer...........................................  34
               4.7.7   Leasehold Mortgagee Transfer a
                         Permitted Sale.....................................  34
      4.8    New Lease......................................................  34
               4.8.1   Terms of New Lease...................................  34
                 4.8.1.1  Written Request to Landlord.......................  35
                 4.8.1.2  Payment of Obligations............................  35
                 4.8.1.3  Remedy of Developer's Defaults....................  36
                 4.8.1.4  New Lease to Have First Priority..................  36
                 4.8.1.5  Developer's Obligations Under
                            New Lease.......................................  37
      4.9    New Lease Priorities...........................................  37
      4.10   Eminent Domain.................................................  37
      4.11   Notice of Arbitration..........................................  38
      4.12   Amendment to Facilitate Leasehold Financing....................  38
      4.13   Security Deposit...............................................  38
      4.14   Estoppel Certificate...........................................  39
      4.15   Notices........................................................  39
      4.16   Erroneous Payments.............................................  40
      4.17   Request for Notice for Benefit of Landlord.....................  40
      4.18   Release or Forebearance........................................  41
      4.19   Notice.........................................................  41
      4.20   No Merger......................................................  41
      4.21   No Payment by Landlord.........................................  41
      4.22   Self Liquidating Mortgage......................................  41
      4.23   Leasehold Mortgagee Need Not Cure Specified Defaults...........  42
      4.24   Casualty Loss..................................................  42
</TABLE>
                                      iii
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                  (continued)
<TABLE> 
<CAPTION> 
                                                                            Page
                                                                            ----
<S>                                                                         <C>
5.  ASSIGNMENT AND SUBLETTING...............................................  42
      5.1  Prohibition Against Change in Ownership,
             Management and Control.........................................  42
             5.1.1   Name and Address for Notices...........................  43
             5.1.2   Type of Entity.........................................  43
             5.1.3   Other Transfers........................................  43
             5.1.4   Buildings or Land......................................  44
      5.2  Assignments Not Subject to Approval..............................  44
             5.2.1   Death or Incapacity....................................  44
             5.2.2   Family Transfer........................................  44
             5.2.3   Affiliated Corporation.................................  44
             5.2.4   IRS Transfer...........................................  45
             5.2.5   Public Entity..........................................  45
             5.2.6   Partner................................................  45
             5.2.7   Comprising Entity......................................  45
      5.3  Assignment Invalid...............................................  46
      5.4  Approval of Assignments..........................................  46
             5.4.1   Name...................................................  46
             5.4.2   Description............................................  46
             5.4.3   Nature of Business.....................................  46
             5.4.4   Financial Information..................................  46
             5.4.5   Officers...............................................  47
             5.4.6   Additional Information.................................  47
             5.4.7   Informational Purposes.................................  47
             5.4.8   Confidentiality........................................  48
             5.4.9   Disapproval by Landlord................................  48
      5.5  No Release.......................................................  48
      5.6  Unauthorized Change..............................................  49
      5.7  Subletting.......................................................  49
             5.7.1   Minor Subleases........................................  52
             5.7.2   Consent to Sublease....................................  52
               5.7.2.1  Description.........................................  52
               5.7.2.2  Name................................................  52
               5.7.2.3  Nature of Business..................................  52
               5.7.2.4  Financial Information...............................  52
               5.7.2.5  Officers............................................  53
               5.7.2.6  Additional Information..............................  53
               5.7.2.7  Informational Purposes..............................  53
             5.7.3   Confidentiality........................................  54
             5.7.4   Disapproval by Landlord................................  54
      5.8  Sale of Buildings................................................  55
      5.9  Master Lease.....................................................  55

6.  INDEMNITY, INSURANCE, CASUALTY DAMAGE...................................  55
      6.1  Indemnification and Hold Harmless................................  55
      6.2  Insurance........................................................  57
             6.2.1  Liability Insurance.....................................  57
</TABLE>
                                       iv
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                  (continued)
<TABLE> 
<CAPTION> 
                                                                            Page
                                                                            ----
<S>                                                                         <C>
             6.2.2  Fire and Extended Coverage..............................  58
             6.2.3  Miscellaneous...........................................  61
             6.2.4  Blanket Policies........................................  62
             6.2.5  Self-Insurance..........................................  63
             6.2.6  Insurance Adjustments...................................  63
      6.3  Damage or Destruction............................................  63
             6.3.1  Restoration of Premises.................................  63
             6.3.2  Right to Terminate......................................  64
             6.3.3  No Reduction in Rent....................................  65

7.  DEVELOPMENT OF THE  PROJECT.............................................  65
      7.1  Scope of Development.............................................  65
      7.2  Developer's Obligation to Develop Premises.......................  66
             7.2.1  Best Efforts to Sublease................................  66
      7.3  Architectural Approval...........................................  67
             7.3.1  Restriction.............................................  67
             7.3.2  Basic Concept Documents.................................  67
             7.3.3  Landscaping.............................................  67
             7.3.4  Exterior Elevations.....................................  68
             7.3.5  Security and Security Plans.............................  68
             7.3.6  Amendments..............................................  69
             7.3.7  Landlord Approval.......................................  69
             7.3.8  Communication and Consultation..........................  71
             7.3.9  Requirements of Institutional
                      Lender or Major Occupant..............................  71
             7.3.10 Interior Improvements...................................  72
             7.3.11 Modification of Plans...................................  72
      7.4  Performance and Payment Bonds....................................  73
             7.4.1  Agreement to Provide....................................  73
             7.4.2  Term of the Bond........................................  74
             7.4.3  Penal Sum...............................................  74
             7.4.4  Alternative Performance.................................  75
      7.5  Construction.....................................................  75
             7.5.1  Costs of Construction...................................  75
             7.5.2  Right to Improve........................................  75
             7.5.3  Governmental Permits....................................  76
             7.5.4  Rights of Access........................................  77
             7.5.5  Local, State and Federal Laws...........................  77
             7.5.6  Antidiscrimination During
                      Construction..........................................  77
             7.5.7  Responsibilities of Landlord............................  78
               7.5.7.1  Governmental  Approvals.............................  78
               7.5.7.2  Easements...........................................  78
               7.5.7.3  Off-Site Improvements...............................  79
               7.5.7.4  Bond Financing......................................  79
               7.5.7.5  Hazardous Materials.................................  80
</TABLE>
                                       v
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                  (continued)
<TABLE> 
<CAPTION> 
                                                                            Page
                                                                            ----
<S>                                                                         <C>
             7.5.8  Responsibilities of Developer...........................  80
             7.5.9  Maintenance.............................................  80
             7.5.10 Acceptance of Premises..................................  80
      7.6  Subdivided Leases................................................  81
             7.6.1  Same Parties............................................  82
             7.6.2  Obligations of Subdivided Leases........................  82
             7.6.3  Terms, Covenants........................................  82
               7.6.3.1  Ground Rent.........................................  83
               7.6.3.2  Improvements........................................  83
               7.6.3.3  Easements and CC & R's..............................  83
               7.6.3.4  Description of  Property............................  84
               7.6.3.5  Excluded Matters....................................  84
      7.7  Combining Leases.................................................  84
             7.7.1  Ground Rent.............................................  85
             7.7.2  Easements and CC & R' s.................................  85

8.  USE.....................................................................  85
      8.1  Permitted Development............................................  85
      8.2  Vehicle Parking..................................................  85
      8.3  Federal Aviation  Administration.................................  86
      8.4  Inspection.......................................................  86

9.  LIENS...................................................................  86
      9.1  Developer's Responsibility.......................................  86
      9.2  Notice of Work...................................................  86
      9.3  Discharge of Liens...............................................  87
      9.4  Landlord's Right to Pay..........................................  87
      9.5  Reimbursement of Landlord........................................  88

10. CONDEMNATION............................................................  88
      10.1 Definition of Terms..............................................  88
             10.1.1  Total Taking...........................................  88
             10.1.2  Partial Taking.........................................  89
             10.1.3  Voluntary Conveyance...................................  89
             10.1.4  Date of Taking.........................................  89
             10.1.5  Leased Land............................................  89
      10.2  Effect of Taking................................................  89
      10.3  Allocation of Award.............................................  90
      10.4  Reduction of Ground Rent on Partial Taking......................  90
      10.5  Temporary Taking................................................  91

11. ALTERATIONS BY DEVELOPER................................................  91

12. TAXES AND ASSESSMENTS...................................................  92
      12.1  Payment by Developer............................................  92
</TABLE>
                                       vi
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                  (continued)
<TABLE> 
<CAPTION> 
                                                                            Page
                                                                            ----
<S>                                                                         <C>
      12.2  Installment Payments............................................  92
      12.3  Proration.......................................................  93
      12.4  Right to Contest................................................  93

13. CERTIFICATES BY DEVELOPER AND LANDLORD..................................  94
      13.1  Developer to Provide............................................  94
      13.2  Landlord to Provide.............................................  95

14. QUIET ENJOYMENT.........................................................  95

15. TERMINATION AND FURTHER LEASING.........................................  96
      15.1  Termination.....................................................  96
      15.2  Termination by Developer........................................  96
      15.3  Termination by Landlord.........................................  96

16. SECURITY DEPOSITS.......................................................  97
      16.1  Good Faith Deposit..............................................  97
              16.1.1  Receipt by Landlord...................................  97
              16.1.2  Form of Deposit.......................................  97
              16.1.3  Interest..............................................  98
              16.1.4  If Bond is Posted.....................................  99

17. GENERAL PROVISIONS......................................................  99
      17.1  Notices, Demands and Communication between
              the Parties...................................................  99
      17.2  Conflict of Interest............................................ 100
      17.3  Enforced Delay: Extension of Time of Performance................ 101
      17.4  Inspection of Books and Records................................. 101
      17.5  Defaults and Remedies........................................... 102
              17.5.1  Defaults - General.................................... 102
              17.5.2  Institution of Legal Actions.......................... 102
              17.5.3  Applicable Law........................................ 103
              17.5.4  Service of Process.................................... 103
              17.5.5  Rights and Remedies Are Cumulative.................... 103
              17.5.6  Inaction Not a Waiver of Default...................... 103
              17.5.7  Remedies.............................................. 104
              17.5.8  Developer's Rights.................................... 105
              17.5.9  Lease Termination..................................... 105
              17.5.10 Landlord's Exercise of Remedies....................... 105
              17.5.11 Payment to Developer.................................. 106
                17.5.11.1  Reimbursement to Landlord........................ 107
</TABLE>                          
                                      vii
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                  (continued)
<TABLE> 
<CAPTION> 
                                                                            Page
                                                                            ----
<S>                                                                         <C>
                17.5.11.2  Reimbursement to Developer....................... 108
                17.5.11.3  Ground Rent...................................... 108
                17.5.11.4  Remaining Balance................................ 108
              17.5.12  Delivery of Plans.................................... 109
      17.6  Right to Contest Laws........................................... 109
      17.7  Trade Fixtures.................................................. 110
      17.8  Continued Possession of Developer............................... 110
      17.9  Utilities....................................................... 111
      17.10 Surrender....................................................... 111
      17.11 Partial Invalidity.............................................. 111
      17.12 Section Headings................................................ 112
      17.13 Short Form Lease................................................ 112
      17.14 Exhibits Incorporated........................................... 112
      17.15 Entire Agreement, Waivers and Amendments........................ 112
      17.16 Waivers......................................................... 113
      17.17 Approvals....................................................... 113
      17.18 Successors in Interest.......................................... 113
      17.19 "And/Or"........................................................ 113
      17.20 "Including" Defined............................................. 113
      17.21 Right of First Refusal to Purchase.............................. 114
      17.22 If Developer is a Trustee....................................... 115
      17.23 Limitation of Liability of Partners............................. 115
      17.24 Approvals....................................................... 116
</TABLE>
                                      viii
<PAGE>
 
                                LIST OF EXHIBITS
<TABLE>
<CAPTION>
                                       First Appearing  At
Ltr.             Description           Paragraph        Page
- ----             --------------------  ---------        ----
<S>     <C>                            <C>              <C>
A       Legal Description of Premises    1.2              1 

B       Site Map of Project Area         1.4              2 

C       Form of Nondisturbance           5.7             50
          Agreement                                       

D       Form of Performance Bond and     7.4.1           73
          Labor and Material Bond                         

E       Form of Assignment               5.9             55

F       Form of Short Form Lease        17.13           112

</TABLE>
<PAGE>
 
                                LEASE AGREEMENT
                                ---------------

     THIS LEASE AGREEMENT (the "Lease") is made this 21st day of April, 1988,
by and between KILROY LONG BEACH ASSOCIATES, a California Limited Partnership,
hereinafter referred to as "Developer", and the BOARD OF WATER COMMISSIONERS OF
THE CITY OF LONG BEACH, acting for and on behalf of the City of Long Beach, a
municipal corporation, hereinafter referred to as "Landlord". Landlord and
Developer hereby agree as follows:

          1.  SUBJECT OF LEASE:
              ----------------

              1.1  Purpose of Lease.  The purpose of this Lease is to provide
                   ----------------
for the lease and improvement of certain Premises, hereinafter described, as
("Project"). This Lease is entered into in order to develop the Project and not
for speculation in land holding. The development of the Project pursuant to and
as contemplated by this Lease is in the best interests of Landlord and in accord
with the public purposes and provisions of applicable State and local laws and
requirements under which the Project is to be undertaken.

              1.2  Lease of Premises. Subject to the terms, covenants and
                   -----------------
conditions of this Lease, Landlord hereby leases to Developer and Developer
hereby takes and hires from Landlord that certain real property (the "Premises")
legally described on Exhibit "A" attached hereto and made a part hereof, upon
the terms and conditions hereinafter set forth. Parcel A and Parcel B described
in Exhibit A are hereinafter referred to as "Parcel A" and "Parcel B".

                                       1
<PAGE>
 
              1.3  The Project Area. The area within which the Project is
                   ----------------
located in the City of Long Beach is the area generally described as the area
bounded by Spring Street on the north, easterly of Redondo Avenue on the west
(adjacent to and easterly of certain retained property of Landlord), Kilroy
Airport Way on the south, westerly of the California National Guard facility on
the southeast, and westerly of Kilroy Airport Way on the northeast.

              1.4  The Premises.  The Premises include those portions of the
                   ------------
Project area illustrated and designated on the site map attached hereto as
Exhibit "B" and forming a part of this Lease and are legally described in the
attached Exhibit "A".

              1.5  Parties to the Lease Agreement.
                   ------------------------------
                   1.5.1  Landlord.  Landlord is the Board of Water
                          --------
          Commissioners of the City of Long Beach acting for and on behalf of
          the City of Long Beach, a municipal corporation organized and existing
          under the laws of the State of California acting in its proprietary
          capacity.  The principal office of Landlord is located at 1800 E.
          Wardlow Road, Long Beach, California 90807.  The term "Landlord" as 
          used in this Lease includes the City of Long Beach, California, and 
          any assignee of or successor to its rights, powers and 
          responsibilities.

                   1.5.2  Developer.  Developer is a California limited
                          ---------
          partnership having a principal place of business at 2250 East Imperial
          Highway, Suite 1200, El Segundo, California 90245.  A written 
          agreement has been executed creating Developer ("Agreement 
          Establishing Developer") 

                                       2
<PAGE>
 
an executed copy of which has been delivered to Landlord. Developer agrees, upon
request of Landlord, to provide Landlord with any amendments to the Agreement
Establishing Developer, so long as Kilroy Long Beach Associates, a California
Limited Partnership, is the party acting as Developer under this Lease.  The
provisions of the foregoing sentence shall apply to any entity becoming a
successor to Developer under this Lease or any other lease which may be
established pursuant hereto covering the Premises.

                   1.5.3  Association by Developer. Notwithstanding any other
                          ------------------------
provisions hereof, Developer reserves the right, at its discretion, to join and
associate with other entities in joint ventures, partnerships or otherwise for
the purpose of leasing and developing the Premises, and Developer may assign
this Lease to any such entity, provided that Developer, or any partner of
Developer having a controlling interest in Developer, continues to manage and
retain policy control over the development and operation of the Premises, until
such time as Developer's interests under this Lease are assigned as permitted
under subsection 5.1, below. As used herein, "manage" shall mean to direct or
supervise the operation and execution of the development of the Premises and to
have authority to act for and bind the entity in all dealings with Landlord
under this Lease. This definition shall be deemed to require Developer to retain
policymaking authority.

                                       3
<PAGE>
 
              1.6  Existing Lease from the City of Long Beach. Developer is the
                   ------------------------------------------
lessee from the City of Long Beach, as Landlord, of certain real property
described in the Lease Agreement dated July 17, 1987 ("Existing City of Long
Beach Ground Lease"). A short form of the City of Long Beach Ground Lease was
recorded on November 15, 1986, as Instrument No. 86-1571363 in official records
of the Los Angeles County Recorder's Office.  It is the intent of the parties
that this Lease Agreement be similar in form to the Existing City of Long Beach
Ground Lease and it is anticipated that in the future the two leases will be
combined into one lease for administrative convenience and continuity of
development by Developer, although neither party is obligated to so combine the
two leases.  If the leases are combined into a single lease, commencement of
construction of improvements upon Parcel A would satisfy the obligation of
Developer under Section 3.1.1 of the Existing City of Long Beach Ground Lease
for commencement of construction upon at least one parcel each twelve (12)
months and the good faith deposit referred to in Section 16.1.1 of this Lease
would be returned to Developer.

          2.  TERM:
              ----

              2.1 Basic Term.  The term of this Lease shall commence on the 
                  ----------
date of execution of this Lease and shall continue thereafter for a period of
approximately forty-seven (47) years, expiring on July 17, 2035.

              2.2 Options for Extensions. Subject to approval by the Board of
                  ----------------------
Water Commissioners of the City of Long Beach and subject to the review by
Landlord of Lease provisions pursuant to Section 37380(b)(l) of the Government
Code, Developer

                                       4
<PAGE>
 
shall have an option for four (4) Lease extensions of ten (10) years each and a
final Lease extension of nine (9) years, so that the total possible duration of
this Lease will be ninety-seven (97) years.  Developer may request at any time
that Landlord formally consider the granting of such Lease extensions, and
Landlord shall act upon such request within ninety (90) days after receipt
thereof.  Any such request is to be made concurrently with a similar request
under the Existing City of Long Beach Ground Lease.  If authority is not given
to exercise options to extend the term of this lease to July 17, 2084, Developer
shall have the option to extend the term of this lease to a total of fifty (50)
years.  This latter option shall be exercised, if at all, in writing, prior to
the end of the term of the lease.

          3.  RENT:
              ----

              3.1  Minimum Ground Rent.  From commencement of the term of this
                   -------------------
Lease, the Ground Rent ("Ground Rent") payments shall be as follows:

                   3.1.1  Holding Rent.  Developer shall pay a Holding Rent for
                          ------------
          Parcels A and B in the sum of Seventy-five Thousand and No/100 Dollars
          ($75,000.00) per year prorated for fractional years and any partial
          month at the commencement of the term until August 31, 1989.
          Developer shall pay Holding Rent for Parcels A and B of One Hundred
          Thousand and No/100 Dollars ($100,000.00) per year for the period

                                       5
<PAGE>
 
commencing September 1, 1989, until commencement of payment of full Initial
Ground Rent.  At such time as Initial Ground Rent has commenced for portions of
Parcels A or B, Holding Rent shall continue to be paid, on a prorated basis, for
the balance of Parcels A and B for which Initial Ground Rent has not commenced.

              3.1.2  Initial Ground Rent. Initial Ground Rent for Parcels A and
                     -------------------
B shall be as follows:

                  3.1.2.1  Parcel A.  The sum of One Hundred Eighty-Three
                           --------
Thousand Five Hundred Thirty-Eight and 75/100 Dollars ($183,538.75) per annum,
which is stated by the parties to be ten percent (10%) of the initial stated
value of the land included in Parcel A, which, in turn, is agreed by the parties
to be One Million Eight Hundred Thirty-Five Thousand Three Hundred Eighty-Seven
and 50/100 Dollars ($1,835,387.50). This amount was calculated by multiplying
146,831 square feet times $12.50 per square foot.

                  3.1.2.2  Parcel B.  The sum of One Hundred Twenty-Nine
                           --------
Thousand Eight Hundred Forty-Five and 00/100 Dollars ($129,845.00) per annum,
which is stated by the parties to be ten percent (10%) of the initial stated
value of the land included in Parcel B, which, in turn, is agreed by the parties
to be One Million Two Hundred Ninety-Eight Thousand, Four Hundred Fifty and
00/100 Dollars ($1,298,450.00). This amount was calculated by multiplying
207,752 square feet times

                                       6
<PAGE>
 
$6.25 per square foot.

                  3.1.2.3  CPI Adjustments to Initial Ground Rent.  The Initial
                           --------------------------------------
Ground Rent for Parcels A and B each shall be adjusted concurrently with the
commencement of such Initial Ground Rent in an amount equal to the increase in
the Consumer Price Index, Los Angeles - Long Beach area, all commodities,
occurring during the period between September 1986 and the month preceding the
month in which Initial Ground Rent commences for Parcels A and B, respectively.
This CPI adjustment is a one-time adjustment occurring only at the commencement
of Initial Ground Rent for Parcels A and/or B, and such adjustment shall not
exceed six percent (6%) per annum from September 1, 1986.

                  3.1.2.4  Additional Adjustment to Initial Ground Rent for
                           ------------------------------------------------
Parcel B. The Initial Ground Rent for Parcel B has been determined on the basis
- --------
that the major portion of Parcel B is subject to a "clear zone" restriction
imposed by the Federal Aviation Administration. Should this clear zone
restriction be removed or modified and should the City of Long Beach permit the
development upon Parcel B of additional office or other income-producing
buildings compatible with Developer's Basic Concept Documents referred to in
Section 7.3.2, and in excess of 1.2 million square feet, then


                                       7
<PAGE>
 
the Initial Ground Rent for Parcel B shall be adjusted to reflect the then fair
market value and prevailing rate of return of Parcel B.  Fair market value for
this purpose shall be determined in the manner provided in sections 3.2.2 and
3.2.3, and in conformity with the following formula:

           (square footage of   )
           (additional entitle- )
           (ments for Parcel B  )   x (H-L) + L =
        ___________________________
             120,000

fair market value per square foot for Parcel B.


         H =  The greater of $12.50 per square foot value of Parcel A; or the
              square foot value of Parcel A as adjusted under Section 3.1.2.3.

         L =  The greater of $6.25 per square foot value of Parcel B; or the
              square foot value of Parcel B as adjusted under Section 3.1.2.3.

Provided that (1) no such adjustment to the Initial Ground Rent for Parcel B
shall be made under this Section 3.1.2.4 if Parcel B has been and remains
committed to surface parking or landscaping or other non-building purposes; and
(2) in any event, such Initial Ground Rent for Parcel B shall not exceed a
stated value of $12.50 per square foot and a return of 10%, except as may be
adjusted pursuant to Section 3.1.2.3.

                                       8
<PAGE>
 
              3.1.3  Commencement of Initial Ground Rent.  The obligation to pay
                     -----------------------------------
Initial Ground Rent shall commence as to Parcel A on the earlier of (a) the date
that construction commences on that parcel, or (b) September 1, 1992, subject to
granting of all required governmental approvals.  The obligation to pay Initial
Ground Rent shall commence as to Parcel B on the earliest of (a) the date that
parking facilities are developed on the property, (b) at such time as
construction commences on that parcel, or (c) September 1, 1993.  The
commencement of Initial Ground Rent for Parcel A pursuant to subparagraph (b)
above, and the commencement of Initial Ground Rent pursuant to subparagraph (c)
above, both shall be extended for so long as the California National Guard
remains in occupancy of Parcel 7 of Tentative Parcel Map No. 16960.
Construction shall be deemed to have commenced upon the date of issuance of a
foundation permit for the first building intended to produce revenue on any
given parcel ("Commencement of Construction").  Parcels A and B may be developed
in one or more increments prior to the above dates. In such instance, Initial
Ground Rent and Holding Rent shall be prorated accordingly.

              3.1.4  Phasing of Initial Ground Rent.  The Initial Ground Rent
                     ------------------------------
due for each parcel shall be a sum equal to fifty percent (50%) of the Initial
Ground Rent attributable to such parcel. Payment

                                       9
<PAGE>
 
of Initial Ground Rent shall continue at that rate until the time set out below,
at which time the full Initial Ground Rent attributable to the Parcel shall
become payable.  For convenience and ease of reference, at such time as Initial
Ground Rent has commenced to be paid in full it is hereinafter referred to as
Ground Rent.

                   3.1.4.1  Parcel A.  The earliest of (a) six (6) months after
                            --------
issuance of an Initial Temporary Certificate of Occupancy of a building shell;
or (b) commencement of subtenant rent; or (c) sixteen (16) months after
commencement of Initial Ground Rent for the Parcel.

                   3.1.4.2  Parcel B.  The earliest of (a) if there are no
                            --------
buildings on the Parcel, the date that parking and/or permanent landscaping
improvements covering more than twenty-five percent (25%) of the areas on the
Parcel are completed or put into use; or (b) six (6) months after issuance of an
Initial Temporary Certificate of Occupancy on a building shell; or (c)
commencement of subtenant rent; or (d) sixteen (16) months after commencement of
Initial Ground Rent for the Parcel.

              3.1.5  Delays in Commencement of Ground Rent.  Developer shall not
                     -------------------------------------
delay the commencement of payment of Initial Ground Rent for a parcel except to
the extent of delays incurred for reasons set out in subsection 17.3 which
render impossible or impractical

                                       10
<PAGE>
 
the construction upon said parcel.  In such case, a delay in the commencement of
payment of Initial Ground Rent for Parcel A shall delay the commencement of
payment of Initial Ground Rent for Parcel B, for the same number of days that
Initial Ground Rent is delayed for Parcel A, unless the clear zone restriction
applicable to Parcel B has theretofore been eliminated.

              3.1.6  Due Dates and Place of Payment.  All Holding Rents and
                     ------------------------------
Ground Rents described herein shall be payable in installments due the first day
of each month. Payment shall be made to the Water Department of the City of Long
Beach at the office of the General Manager, 1800 E. Wardlow Road, Long Beach,
California 90807. Ground Rent installments will be deemed late on the tenth
(10th) day of the month and shall bear interest until the installment is paid at
the rate received by the City of Long Beach on its investment portfolio during
the preceding quarter, provided said interest rate shall not exceed twenty
percent (20%) per year.

              3.1.7  Ground Rent Credit for Extraordinary Costs.  Extraordinary
                     ------------------------------------------
pre-development costs as specified in this Section may be recovered by Developer
by deducting such costs from all ground rent due (not Holding Rent), provided,
however, that Ground Rent shall not be reduced by such deductions to an amount
less than One Hundred Thousand and No/100 Dollars ($100,000.00) per year, and
such recovery of costs

                                      11
<PAGE>
 
pursuant to this Section shall not continue after December 31, 2002.

                   3.1.7.1  Limitations.  Extraordinary costs recoverable 
                            -----------
under this Section are limited to: (a) the actual direct cost of purchasing any
existing leasehold interests within the area of the Premises; (b) the actual
direct costs of demolishing and/or reconstructing any facilities of Landlord,
provided that the Landlord shall have the option of demolishing and/or
reconstructing such facilities at Landlord's expense; and (c) interest on items
(a) and (b) immediately above, calculated at the construction loan rate and
associated fees then being paid by Developer with respect to the Project. The
total interest to be paid shall not exceed a rate two percent (2%) above the
prime rate of Security Pacific National Bank, against such principal amount of
extraordinary pre-development costs and for such term as Landlord and Developer
shall agree upon. Should Landlord require that any replacement facilities be
greater in size or capacity than the facilities removed, then Landlord shall pay
the excess cost of the greater size or capacity, except to the extent such
additional size or capacity is required to serve the Developer's project.

                   3.1.7.2  Approval of Costs.  At least 90 days prior to making
                            -----------------
any rent adjustments pursuant

                                       12
<PAGE>
 
to this Section, Developer shall submit to Landlord an itemized statement of
extraordinary costs incurred, and a schedule showing the proposed amounts of
rent credit to be taken.  Said statement and schedule shall be subject to audit
by Landlord as to conformity with this Lease.



         3.2  Ground Rent Adjustments.
              -----------------------

              3.2.1  Adjustment Dates.  The fair market land value and
                     ----------------
prevailing rate of return for each parcel shall be determined in the year 2000,
with respect to Ground Rent payable commencing January 1, 2001, and every five
(5) years thereafter, in the event construction commences on or before September
1, 1989, or for the first time in the year 2005 with respect to Ground Rent
payable commencing January 1, 2006, and every five (5) years thereafter in the
event construction commences after September 1, 1989, and the Ground Rent shall
be adjusted accordingly on the first (1st) day of each sixth (6th) year
thereafter. Said dates of adjustment of Ground Rent shall be referred to for
convenience as "adjustment dates".

              3.2.2  Ground Rent Adjustments by Appraisal.  With respect to each
                     ------------------------------------
Ground Rent adjustment date, the fair market land value and prevailing rate of
return shall be determined by agreement between Landlord and Developer, but
should they not be able to agree at least two hundred ten (210) days prior to an
adjustment

                                       13
<PAGE>
 
date, then such fair market land value and prevailing rate of return shall be
determined by appraisal, according to Section 3.2.3, by an analysis of
comparable land transactions committed to the same usage and either zoned for or
improved with facilities of similar density and height considerations, and/or
such other appraisal method(s) recognized by the appraisal profession as are
appropriate for fair market land value appraisals and mutually agreed to by the
appraisers at time of reevaluation as being appropriate, recognizing market
conditions that prevail as of the date of value.

                   3.2.2.1  Adjustment for 0ff-Site Costs. The fair market land
                            -----------------------------
value (as agreed upon by Landlord and Developer or as determined by appraisal)
shall be adjusted (the "Adjusted Fair Market Land Value") in the proportion that
the stated value of the land included in Parcels A and B, as set forth in
Sections 3.1.2.1 and 3.1.2.2, bears to the sum of the original stated land value
of the land included in Parcels A and B, plus the actual cost of off-site costs
required by Landlord or the City of Long Beach as a precondition to the
development of Parcel A and/or Parcel B as defined in Section 3.6 and subject to
Sections 3.6 through 3.10. The Adjusted Fair Market Land Value shall be
converted into an annual Ground Rent obligation based on the prevailing rate of
return as determined pursuant to subsections 3.2.2 and 3.2.3.1. This adjustment
for off-site costs shall only apply

                                       14
<PAGE>
 
during the Basic Term of this Lease.

              3.2.3  Appraisal.  In the event the parties are unable to agree
                     ---------
upon the fair market rental value or the prevailing rate of return or the method
of appraisal of the Premises at any adjustment date, the fair rental value of
the subject land and/or the prevailing rate of return shall be determined by
appraisals prepared by two appraisers, one appointed by the Landlord at its
expense and one appointed by the Developer at its expense, both of whom shall be
MAI members of the American Institute of Real Estate Appraisers or a successor
organization in the event the American Institute of Real Estate Appraisers
ceases to exist. Said appraisers shall be appointed not more than six (6) months
prior to the commencement of the rental adjustment period but, in any event,
within thirty (30) days after either party has given notice in writing of
inability to agree. Both appraisals must be completed and submitted to the
Landlord and Developer respectively within sixty (60) days after the appointment
of the appraisers. The two appraisals shall be averaged unless the higher of the
two appraisals exceeds the lesser by ten percent (10%) or more, in which case
the two appraisers shall appoint a third appraiser, also an MAI member of the
American Institute. In order to select such third appraiser, if the two
appraisers do not agree, the appraisers shall obtain a list of five appraisers
from the President of the American Institute

                                       15
<PAGE>
 
of Real Estate Appraisers and shall alternately strike names from such list
until one remains to become the third appraiser.  The third appraiser shall be
appointed by the first two appraisers within fourteen (14) days after notice
from either of the parties to this Lease that the appointment of a third
appraiser is necessary. The cost of such third appraiser shall be shared equally
by the parties to this Lease.  The third appraiser shall complete and submit the
required appraisal to both parties within sixty (60) days after appointment. All
appraisals shall be in the form of written reports supported by facts and
analysis.  The two of the three appraisers arriving at values closest to each
other shall attempt to concur on a value.  If they are unable to do so within
thirty (30) days, the two closest appraisals shall be averaged and that value
shall be the fair market value of the land or the prevailing rate of return, as
appropriate.  The total appraised value of both parcels shall not exceed the
appraised value of the Premises.  The Adjusted Fair Market Land Value shall be
converted into an annual Ground Rent obligation based on the prevailing rate of
return on similar ground leases then current in the market.  Disagreements
between the two appraisers as to the method of appraisal shall be resolved by a
third appraiser, appointed in the manner described in this subsection.

                   3.2.3.1  Prevailing Rate of Return. As used in this Lease,
                            -------------------------
the term "prevailing rate of return"

                                       16
<PAGE>
 
shall mean the percentage of fair market value which is charged to lessee by
lessor in lease agreements for similar or comparable uses entered into or
renewed in the Los Angeles/Orange County urban area during the preceding twelve
months, which lease agreements are reasonably comparable in their terms to this
Lease.

              3.2.4  Maximum Rent Increase. The increase, if any, in Ground Rent
                     ---------------------
at the time of any adjustment date shall for Parcel A and B be limited to no
more than the increase in subtenant rents as described in this section: 

                   3.2.4.1  Allocation to Parcels.  The amount of Ground Rent
                            ---------------------
attributable to each parcel shall remain in effect during the term of the Lease
unless parcel areas change.

                   3.2.4.2. Base Sublease Rental. The base sublease rental for
                            --------------------
each parcel shall be the total annualized rent, stabilized to exclude free rent,
reduced rent or excess tenant improvement amortization or other similar
concessions or considerations measured in the first year in which more than
eighty percent (80%) of the rentable space on a given parcel is rented, prorated
to full occupancy. If no improvements have been constructed upon Parcel B, then
Parcels A and B shall be considered as one parcel fox the purpose of this
Section 3.2.4 and the limitation upon increases in Ground Rent for both Parcels
A and B shall be the same percentage rate of rental increase

                                       17
<PAGE>
 
applicable to Parcel A.

                   3.2.4.3  Sublease Rental Percentage Change The sublease
                            ---------------------------------
rental percentage change shall be determined by calculating the percentage
changes in sublease rental between the base sublease rental for Parcel A and B,
respectively, or for both Parcels A and B combined under the circumstances
described in subsection 3.2.4.2 above and the actual sublease rental due to
Developer for the same parcel or parcels in the full year preceding a Ground
Rent Adjustment date, stabilized to exclude any free rent, reduced rent or 
excess tenant improvement amortization or other similar concessions or 
considerations.

                   3.2.4.4  Adjusted Ground Rent.  The "Adjusted Ground Rent" 
                            --------------------
for each parcel (or for both Parcel A and B, if applicable) at any given
adjustment period shall be the lesser of the Adjusted Fair Market Rental Value
for such parcel as determined in subsection 3.2.2 above or the initial Ground
Rent for such parcel plus the product of the Sublease Rental Percentage Change
determined in subsection 3.2.4.3 above times the Ground Rent for such parcel or
both parcels, if Section 3.2.4.2 is applicable. To the extent that the Adjusted
Fair Market Rental Value is greater than the Adjusted Ground Rent, the
difference may be carried forward into the next five (5) year adjusted rental
period but not into any subsequent five (5) year adjusted rental periods, and
thereby recovered by

                                       18
<PAGE>
 
         Landlord.  The amount of Ground Rent during a five (5) year adjusted
         rental period where there has been such a carry forward shall not
         exceed one hundred ten percent (110%) of the fair market Ground Rent as
         determined for that period.

                   3.2.4.5  Sale or Assignment of Leasehold Interest. Should
                            ----------------------------------------
         Developer sell, assign or otherwise transfer its leasehold interest to
         an owner-user such that sublease rental is not paid to Developer, the
         fair market sublease rental for such building, using the criteria and
         methods set out in subsection 3.2.2, shall become the basis for
         calculating the maximum rental adjustment using the process described
         in 3.2.4.3 above.

              3.3  Ground Rent Adjustments Following Reconstruction. Developer
                   ------------------------------------------------
contemplates, pursuant to Section 11 hereof, that during the term of this Lease,
any or all of the buildings or other material improvements developed on the
Premises may be demolished and new buildings or other material improvements
constructed in their place in order to meet the then current market demand,
subject to Landlord approval pursuant to Section 7. In the event of such
demolition and new construction on either parcel, the provisions of subsection
3.2 shall be modified with respect to such parcel as set forth below in
subsections 3.3.1 and 3.3.2. This subsection 3.3 shall not apply to demolition
and new construction which is due to damage or destruction, as described in
subsection 6.3, where said new construction is

                                       19
<PAGE>
 
limited to one for one replacement of useable or rentable floor area in the same
general building configuration as that which previously existed.

              3.3.1  Ground Rent Adjustments.  Ground Rent for each parcel
                     -----------------------
          (or both parcels together, if subsection 3.2.4.2  is applicable) 
          shall be adjusted according to the process set out in subsections 
          3.2.2 and 3.2.3 of this Lease.

                   3.3.1.1  Adjustment Date.  The adjustment shall be effective
                            ---------------
          either six (6) months after issuance of an Initial Temporary
          Certificate of Occupancy of the building shell or commencement of
          subtenant rent, whichever occurs earlier; or

                   3.3.1.2  Alternate Adjustment Date.  In the event a regular
                            -------------------------
          five (5) year Ground Rent adjustment date for the parcel, as
          established in subsection 3.2.1, occurs after commencement of
          demolition of a building on said parcel and prior to completion of
          construction of a new building in its place, said adjustment shall
          take place on schedule and shall be based upon the assumption that
          construction of the planned new building has been completed.

              3.3.2  No Adjustment At Next Scheduled Adjustment Date.
                     -----------------------------------------------
          There shall be no Ground Rent adjustment for such parcel at the next
          scheduled adjustment date, but all subsequent Ground Rent adjustments
          shall occur on the schedule set out in subsection 3.2.1.

                                       20
<PAGE>
 
              3.3.3  Maximum Ground Rent Adjustment.  For purposes of
                     ------------------------------
     determining the maximum Ground Rent increase under subsection 3.2.4 at the
     time of the next Ground Rent adjustment and thereafter, the base sub-lease
     rental described in subsection 3.2.4 shall be established with respect to
     the new building or buildings constructed on the parcel (with Parcel A and
     B to be considered together if subsection 3.2.4.2 is applicable).

          3.4 Adjustments to Ground Rent During Option Term. At the commencement
              ---------------------------------------------
of each option term, and at the end of each five (5) years of each option term,
the Ground Rent shall be determined as provided in subsection 3.2.2, but with no
adjustment thereto as is provided in said subsection 3.2.2.1.  The fair market
land value shall be converted into an annual Ground Rent obligation based on the
rate of return then current in the market for parcels which are currently and
fairly appraised.

          3.5  Maximum Ground Rent Increase. However, the increase in Ground
               ----------------------------
Rent at the end of five (5) years of each option term shall be subject to the
provisions of subsection 3.2.4, with the first year of the option term as the
base period for determining sublease rental and the fifth (5th) year of the
option term being the adjustment year for determining actual rental received,
both to be stabilized to exclude any free rent, reduced rent, excess tenant
improvement amortization or other similar concessions or considerations. The
Ground Rent commencing the sixth (6th) year of any option term cannot increase
at a percentage rate greater than the percentage increase in sublease

                                       21
<PAGE>
 
rentals from the base year to the adjustment year.

          3.6  Definition of Offsite Costs.  For purposes of this Lease, Offsite
               ---------------------------
Costs shall include all costs actually incurred by Developer, which costs are
required by Landlord or the City of Long Beach as a precondition to the
development of Parcel A and/or Parcel B.  Offsite Costs shall not include any
costs directly associated with the construction of buildings or parking upon the
Premises.

          3.7  Approval of Improvement Plans.  Prior to commencement of any
               -----------------------------
construction of items identified in Section 3.6, Developer shall submit to
Landlord engineering plans and costs estimates for said items.  Specifications
for all improvements shall meet the standard specifications of the City of Long
Beach for such improvements.  Landlord shall review said plans for conformity
with the requirements of Landlord and/or the City of Long Beach and approve or
disapprove them as to such conformity in accordance with the procedures and
criteria set out in subsection 7.3.7.

          3.8  Determination of Offsite Costs.  Following receipts of bids, and
               ------------------------------
prior to the award of a contract for construction of items shown on the plans
approved pursuant to subsections 3.7 and 7.5.3 ("Approved Plans"), Developer
shall submit to Landlord all bids received and a statement indicating which bid
Developer intends to accept.  The bid shall identify each item of cost in the
same manner as the estimate of costs submitted pursuant to subsection 3.7.
Landlord shall have the right to assert that any such item of cost is excessive
on the basis of Landlord's experience with comparable construction,

                                       22
<PAGE>
 
taking into consideration the total cost of the work, and Developer and Landlord
shall attempt to arrive at an agreed cost for said item.  In the event Developer
and Landlord are unable to arrive at an agreed cost, then Developer and Landlord
shall accept the decision of a jointly appointed independent registered civil
engineer with experience in similar matters, who shall be directed to consider
the positions of both Developer and Landlord and to establish within five (5)
days, or such longer time as may be mutually agreed by Developer and Landlord,
the agreed cost for any contested items, again taking into consideration the
total cost of the work.

          The actual bid cost, or the agreed cost, where the bid cost is
disputed, shall be deemed to be the actual cost of construction for each cost
item to the extent that such costs are actually incurred as a result of the
installation or construction of items or quantities of materials.  Landlord
shall have the right to monitor the construction of all items included in the
Approved Plans to ensure that such construction is in accordance with the
Approved Plans and the approved costs.  During the period of construction,
Landlord, through the Director of Public Works of the City of Long Beach, or the
General Manager of Landlord, and Developer may agree upon modifications to the
Approved Plans and to the bid costs or agreed costs as may be required by
unforeseen conditions.

          Upon completion of construction, the aggregate of all costs which have
been approved by the operation of this subsection, and which are actually
incurred, less any costs paid by Landlord, shall become the amount of "Offsite
Costs" referred

                                       23
<PAGE>
 
to in subsection 3.2.2.1.  Landlord shall have the right to audit and review all
contracts, invoices, payments, and other pertinent materials as may be necessary
to confirm the actual costs incurred.

          3.9  Construction by Landlord.  The City of Long Beach or Landlord
               ------------------------
shall design and install all traffic signals and modifications thereto if any
are included in the plans approved pursuant to subsection 3.7.  Such
installation shall be paid for by Landlord or Developer, at Landlord's option.
All Offsite Costs shall be paid by Developer.

          3.10 Phasing of Improvements.  Developer shall have the right to
               -----------------------
design and construct improvements in phases, in accordance with a phasing plan
which shall be approved by Landlord.  Plans, estimates of costs, and bids for
phases of work shall be treated in the same manner as set out in subsections 3.7
through 3.9.

     4.   LEASEHOLD MORTGAGES:
          -------------------

          4.1  Leasehold Mortgage Authorized.  On one or more occasions
               -----------------------------
Developer may take back a Purchase Money Leasehold Mortgage upon a sale and
assignment of the Leasehold Estate created by this Lease or may mortgage or
otherwise encumber Developer's Leasehold Estate to an Institutional Lender (as
hereinafter defined), under one or more Leasehold Mortgages and assign this
Lease as security for such Mortgage or Mortgages.

          4.2  Notice to Landlord.
               ------------------

               4.2.1  Leasehold Mortgage Requirements.  If Developer shall,
                      -------------------------------
          on one or more occasions, take back a

                                       24
<PAGE>
 
Purchase Money Leasehold Mortgage upon a sale and assignment of the Leasehold
Estate or shall mortgage Developer's Leasehold Estate to an Institutional
Lender, and if the Holder of such Leasehold Mortgage shall provide Landlord with
notice of such Leasehold Mortgage together with a true copy of such Leasehold
Mortgage and the name and address of the Mortgagee, Landlord and Developer agree
that, following receipt of such notice by Landlord, the provisions of this
Section 4 shall apply in respect to each such Leasehold Mortgage.

              4.2.2  Assignment of Leasehold Mortgage.  In the event of any
                     --------------------------------
assignment of a Leasehold Mortgage or in the event of a change of address of a
Leasehold Mortgagee or of an assignee of such Mortgage, notice of the new name
and address shall be provided to Landlord within ten (10) days after completion
of such assignment.

              4.2.3  Landlord's Acknowledgement of Notice. Landlord shall
                     ------------------------------------
promptly upon receipt of a communication purporting to constitute the notice
provided for by subsections 4.2.1 or 4.2.2, above, acknowledge by an instrument
in recordable form receipt of such communication as constituting the notice
provided for by subsections 4.2.1 or 4.2.2, or, in the alternative, notify
Developer and the Leasehold Mortgagee of the rejection of such communication as
not conforming with the provisions of subsections 4.2.1 or 4.2.2, and specify
the specific basis of such rejection.


                                       25
<PAGE>
 
              4.2.4  Developer to Provide Copies.  After Landlord has received
                     ---------------------------
the notice provided for by subsections 4.2.1 or 4.2.2 above, Developer, upon
being requested to do so by Landlord, shall within ten (10) days provide
Landlord with copies of the note or other obligation secured by such Leasehold
Mortgage and of any other documents pertinent to the Leasehold Mortgage as
specified by Landlord. If requested to do so by Landlord, Developer shall
thereafter also provide Landlord from time to time with a copy of each amendment
or other modification or supplement to such instruments. All recorded documents
shall be accompanied by the appropriate certification of the Custodian of the
Recording Office as to their authenticity as true and correct copies of the
official records and all non-recorded documents shall be accompanied by a
certification by Developer that such documents are true and correct copies of
the originals. From time to time upon being requested to do so by Landlord,
Developer shall also notify Landlord of the date and place of recording and
other pertinent recording data with respect to such instruments as have been
recorded.

     4.3  Definitions.
          -----------

          4.3.1  Institutional Lender.  The term "Institutional Lender" as used
                 --------------------
in this Section 4 shall refer to a savings bank, savings and loan association,
commercial bank, trust company, credit union, insurance company, college,
university, real estate investment

                                       26
<PAGE>
 
         trust or pension fund.  The term "Institutional Lender" shall also
         include other lenders of substance which have assets in excess of Fifty
         Million and No/l00 Dollars ($50,000,000.00) at the time the Leasehold
         Mortgage is made.

                   4.3.2  Leasehold Mortgage.  The term "Leasehold Mortgage" as
                          ------------------
         used in this Section 4 shall include a mortgage, a deed of trust, a
         deed to secure debt, or other security instrument by which Developer's
         Leasehold Estate is mortgaged, conveyed, assigned or otherwise
         transferred, to secure a debt or other obligation.

                   4.3.3  Leasehold Mortgagee.  The term "Leasehold Mortgagee"
                          -------------------
          as used in this Section 4 shall refer to a holder of a Leasehold
          Mortgage in respect to which the notice provided for by subsection 4.2
          has been given and received and as to which the provisions of this
          Section 4 are applicable.

              4.4 Consent of Leasehold Mortgagee Required.  No cancellation,
                  ---------------------------------------
surrender or modification of this Lease shall be effective as to any Leasehold
Mortgagee unless consented to in writing by such Leasehold Mortgagee.

              4.5 Default Notice.  Landlord upon providing Developer any notice
                  --------------
of: (i) default under this Lease, (ii) a termination of this Lease, or (iii) a
matter of which Landlord may predicate or claim a default, shall at the same
time provide a copy of such notice to every Leasehold Mortgagee. No such notice
by Landlord to Developer shall be deemed to have been duly given unless and
until a copy thereof has been so provided to

                                       27
<PAGE>
 
every Leasehold Mortgagee having a lien upon the Premises.  From and after the
date such notice has been given to a Leasehold Mortgagee, such Leasehold
Mortgagee shall have the same period, after giving of such notice upon it, for
remedying any default or acts or omissions which are the subject matter of such
notice or causing the same to be remedied, as is given Developer after the
giving of such notice to Developer, plus in each instance, the additional
periods of time specified in subsections 4.6 and 4.7 to remedy, commence
remedying or cause to be remedied the defaults or acts or omissions which are
the subject matter of such notice specified in any such notice.  Landlord shall
accept such performance by or at the instigation of such Leasehold Mortgagee as
if the same had been done by Developer.  Developer authorizes each Leasehold
Mortgagee to take any such action at such Leasehold Mortgagee's option and does
hereby authorize entry upon the Premises by the Leasehold Mortgagee for such
purpose.

              4.6  Notice to Leasehold Mortgagee.
                   -----------------------------

                   4.6.1  Landlord's Termination Notice.  Anything contained in
                          -----------------------------
          this Lease to the contrary notwithstanding, if any default shall occur
          which entitles Landlord to terminate this Lease, Landlord shall have
          no right to terminate this Lease unless, following the expiration of
          the period of time given Developer to cure such default or the act or
          omission which gave rise to such default, Landlord shall notify every
          Leasehold Mortgagee of Landlord's intent to so terminate ("Termination
          Notice") at least thirty (30) days in advance of the

                                       28
<PAGE>
 
proposed effective date of such termination if such default is capable of being
cured by the payment of money ("Termination Notice Period"), and at least sixty
(60) days in advance of the proposed effective date of such termination if such
default is not capable of being cured by the payment of money (also a
"Termination Notice Period").  The provisions of subsection 4.7, shall apply if,
during such thirty (30) or sixty (60) day Termination Notice Period, any
Leasehold Mortgagee shall:

                   4.6.1.1  Notify Landlord of such Leasehold Mortgagee's desire
to nullify such notice; and

                   4.6.1.2  Pay or cause to be paid all Ground Rent, additional
rent and other payments then due and in arrears as specified in the Termination
Notice to such Leasehold Mortgagee and which may become due during such thirty
(30) or sixty (60) day Termination Notice Period; and

                   4.6.1.3  Comply or in good faith, with reasonable diligence
and continuity, commence to comply with all nonmonetary requirements of this
Lease then in default and reasonably susceptible of being complied with by such
Leasehold Mortgagee; provided however, that such Leasehold Mortgagee shall not
be required during such sixty (60) day Termination Notice Period to cure or
commence to cure any default consisting of Developer's failure to satisfy and
discharge any lien, charge or encum-

                                       29
<PAGE>
 
brance against the Developer's interest in this Lease or the Premises junior in
priority to the lien of the mortgage held by such Leasehold Mortgagee.

          4.6.2  Proper Address of Leasehold Mortgagee. Any notice to be given
                 -------------------------------------
by Landlord to a Leasehold Mortgagee pursuant to any provision of this Section 4
shall be deemed properly addressed if sent to the Leasehold Mortgagee who served
the notice referred to in subsection 4.2.1 unless notice of a change of Mortgage
ownership has been given to Landlord pursuant to subsection 4.2.2.

     4.7  Procedure on Default.
          --------------------
         
          4.7.1  Extension of Termination Notice Period. If Landlord shall elect
                 --------------------------------------
to terminate this Lease by reason of any default of Developer, and a Leasehold
Mortgagee shall have proceeded in the manner provided for by subsection 4.6, the
specified date for the termination of this Lease as fixed by Landlord in its
Termination Notice shall be extended for a period of six (6) months, provided
that such Leasehold Mortgagee shall during such six (6) month period:

              4.7.1.1  Payment of Monetary Obligations. Pay or cause to be paid
                       -------------------------------
the Ground Rent, additional rent and other monetary obligations of Developer
under this Lease as the same become due, and continue its good faith efforts to
perform all of Developer's other obligations under this Lease.

                                       30
<PAGE>
 
              4.7.1.2  Foreclosure of Leasehold Mortgage. If not enjoined or
                       ---------------------------------
stayed, take steps to acquire or sell Developer's interest in this Lease by
foreclosure of the Leasehold Mortgage or other appropriate means and prosecute
the same to completion with due diligence.

          4.7.2  Cure of Default.  If at the end of such six (6) month period
                 ---------------
such Leasehold Mortgagee is complying with subsections 4.7.1.1 and 4.7.l.2, this
Lease shall not then terminate, and the time for completion by Leasehold
Mortgagee of its proceedings shall continue so long as such Leasehold Mortgagee
is enjoined or stayed and thereafter for so long as such Leasehold Mortgagee
proceeds to complete steps to acquire or sell Developer's interest in this Lease
by foreclosure of the Leasehold Mortgage or by other appropriate means with
reasonable diligence and continuity.  Nothing in this subsection 4.7, however,
shall be construed to extend this Lease beyond the original term thereof as
extended by any options to extend the term of this Lease properly exercised by
Developer or a Leasehold Mortgagee in accordance with subsection 2.1, nor to
require a Leasehold Mortgagee to continue such foreclosure proceedings after the
default has been cured. If the default shall be cured and the Leasehold
Mortgagee shall discontinue such foreclosure proceedings, this Lease shall
continue in full force and effect as if Developer had not defaulted under this
Lease.

                                       31
<PAGE>
 
          4.7.3  Compliance of Leasehold Mortgagee.  If a Leasehold Mortgagee is
                 ---------------------------------
complying with subsection 4.7.1 upon the acquisition of Developer's Leasehold
Estate herein by such Leasehold Mortgagee or its designee or any other purchaser
at a foreclosure sale or otherwise this Lease shall continue in full force and
effect as if Developer had not defaulted under this Lease.

          4.7.4  Leasehold Mortgage Not an Assignment. For the purposes of this
                 ------------------------------------
Section 4, the making of a Leasehold Mortgage issued by an institutional lender
shall not be deemed to constitute an assignment or transfer of this Lease or of
the Leasehold Estate hereby created, nor shall any Leasehold Mortgagee, as such,
be deemed to be an assignee or transferee of this Lease or of the Leasehold
Estate hereby created so as to require such Leasehold Mortgagee, as such, to
assume the performance of any of the terms, covenants or conditions on the part
of Developer to be performed hereunder, but the purchaser at any sale of this
Lease and of the Leasehold Estate hereby created in any proceedings for the
foreclosure of any Leasehold Mortgage, or the assignee or transferee of this
Lease and of the Leasehold Estate hereby created under any instrument of
assignment or transfer in lieu of the foreclosure of any Leasehold Mortgage
shall be deemed to be an assignee or transferee within the meaning of this
Section 4, and shall be deemed to have agreed to perform all of the terms,
covenants and conditions on the part

                                       32
<PAGE>
 
of Developer to be performed hereunder from and after the date of such purchase
and assignment, but only for so long as such purchaser or assignee is the owner
of the Leasehold Estate.  Provided, however, that Developer shall, as to such
Leasehold Mortgagee, provide to Landlord the same information which Developer
must supply pursuant to this Lease as assignee.

          4.7.5  Obligation of Leasehold Mortgagee to Repair or Reconstruct. If
                 ----------------------------------------------------------
the Leasehold Mortgagee or its designee shall become holder of the Leasehold
Estate, and if the buildings and improvements on the Premises shall have been or
become materially damaged on, before or after the date of such purchase and
assignment, the Leasehold Mortgagee or its designee shall be obligated to
repair, replace or reconstruct the building or other improvements only to the
extent of the net insurance proceeds received by the Leasehold Mortgagee or its
designee by reason of such damage. However, should such net insurance proceeds
be insufficient to repair, replace or reconstruct the building or other
improvements to the extent required by subsection 6.3, and should the Leasehold
Mortgagee or its designee choose not to fully reconstruct the building or other
improvements to the extent required by subsection 6.3, such failure shall
constitute an event of default under this Lease which shall entitle Landlord to
commence proceedings to terminate the Lease.

                                       33
<PAGE>
 
          4.7.6  Leasehold Mortgagee's Right to Transfer. Any Leasehold
                 ---------------------------------------
Mortgagee or other acquirer of the Leasehold Estate of Developer pursuant to
foreclosure, assignment in lieu of foreclosure or other proceedings may, upon
acquiring Developer's Leasehold Estate, without further consent of Landlord,
assign the Leasehold Estate one time on such terms and to such persons and
organizations as are acceptable to such Mortgagee or acquirer and thereafter be
relieved of all obligations under this Lease; provided that such assignee has
delivered to Landlord its written agreement to be bound by all of the provisions
of this Lease.  Any further attempts by the Leasehold Mortgagee to assign shall
comply with the provisions of this Lease relating to Assignment.

         4.7.7  Leasehold Mortgagee Transfer a Permitted Sale.  Notwithstanding
                ---------------------------------------------
any other provisions of this Lease, any sale of this Lease and of the Leasehold
Estate hereby created in any proceedings for the foreclosure of any Leasehold
Mortgage, or the assignment or transfer of this Lease and of the Leasehold
Estate hereby created in lieu of the foreclosure of any Leasehold Mortgage shall
be deemed to be a permitted sale, transfer or assignment of this Lease and of
the Leasehold Estate hereby created.

    4.8   New Lease.
          ---------

          4.8.1  Terms of New Lease.  In the event of the termination of this
                 ------------------
Lease as a result of Developer's

                                       34
<PAGE>
 
default Landlord shall, in addition to providing the notices of default and
termination as required by subsections 4.5 and 4.6, provide each Leasehold
Mortgagee with written notice that the Lease has been terminated, together with
a statement of all sums which would at that time be due under this Lease but for
such termination, and of all other defaults, if any, then known to Landlord.
Landlord agrees to enter into a new lease ("New Lease") of the Premises with
such Leasehold Mortgagee, or its designee for the remainder of the term of this
Lease, effective as of the date of termination, at the Ground Rent and
additional rent, and upon the terms, covenants and conditions, including all
first rights of refusal and options to renew or purchase, but excluding
requirements which are not applicable or which have already been fulfilled of
this Lease, provided:

              4.8.1.1  Written Request to Landlord. Such Leasehold Mortgagee
                       ---------------------------
shall make written request upon Landlord for such New Lease within thirty (30)
days after the date such Leasehold Mortgagee receives Landlord's Notice of
Termination of this Lease given pursuant to this subsection 4.8.

              4.8.1.2  Payment of Obligations.  Such Leasehold Mortgagee or its
                       ----------------------
designee shall pay or cause to be paid to Landlord at the time of execution and
delivery of such New Lease, any and all sums which would at the time of
execution and delivery thereof be due pursuant to this Lease but

                                       35
<PAGE>
 
for such termination and, in addition thereto, all reasonable expenses,
including reasonable attorney's fees, which Landlord shall have incurred by
reason of such termination and the execution and delivery of the New Lease and
which would not otherwise have been received by Landlord from Developer or other
party in interest under Developer. In the event of a controversy as to the
amount to be paid to Landlord pursuant to this subsection 4.8.1.2, the payment
obligation shall be satisfied if Landlord shall be paid the amount not in
controversy, and the Leasehold Mortgagee or its designee shall agree to pay any
additional sum ultimately determined to be due plus interest at the rate set
forth in subsection 3.1.6, and such obligation shall be adequately secured.

          4.8.1.3  Remedy of Developer's Defaults. Such Leasehold Mortgagee or
                   ------------------------------
its designee shall agree to remedy any of Developer's defaults of which said
Leasehold Mortgagee is or may be notified by Landlord's Notice of Termination
and which are reasonably susceptible of being so cured by Leasehold Mortgagee or
its designee.

          4.8.1.4  New Lease to Have First Priority. Any New Lease made 
                   --------------------------------
pursuant to this subsection 4.8 and any Subdivided Lease entered into pursuant
to subsection 7.6 and any Single Lease entered into pursuant to subsection 7.7,
shall be prior to any

                                      36
<PAGE>
 
     mortgage or other lien, charge or encumbrance on the fee of the Premises
     and the Developer under such New Lease, Single Lease or Subdivided Lease,
     as the case may be, shall have the same right, title and interest in and to
     the Premises and the buildings and improvements thereon as Developer had
     under this Lease.

          4.8.1.5  Developer's Obligations Under New Lease.  The Developer 
                   ---------------------------------------
     under any such New Lease, Single Lease or Subdivided Lease shall be liable
     to perform the obligations imposed on the Developer by such New Lease,
     Single Lease or Subdivided Lease only during the period such person or
     entity has ownership of such Leasehold Estate.

          4.9  New Lease Priorities.  If more than one Leasehold Mortgagee 
               --------------------
shall request a New Lease pursuant to subsection 4.8.1, Landlord shall enter
into such New Lease with the Leasehold Mortgagee whose mortgage is prior in lien
or with the designee of such Leasehold Mortgagee. Landlord, without liability to
Developer or any Leasehold Mortgagee with an adverse claim, may rely upon
mortgagee title insurance policy issued by a responsible title insurance company
doing business within the State of California as the basis for determining the
appropriate Leasehold Mortgagee who is entitled to such New Lease.

          4.10  Eminent Domain.  Developer's share, as provided by subsection
                --------------
10.3, of the proceeds arising from an exercise of the power of Eminent Domain
shall, subject to the provision of such subsection 10.3, be disposed of as
provided for by any

                                      37
<PAGE>
 
Leasehold Mortgagee.

          4.11  Notice of Arbitration.  Landlord shall give each Leasehold
                ---------------------
Mortgagee prompt notice of any appraisal, arbitration or legal proceedings
between Landlord and Developer involving obligations under this Lease.  Landlord
shall give the Leasehold Mortgagee notice of, and a copy of any award or
decision made in any such proceedings, which shall be binding on all Leasehold
Mortgagees.

          4.12  Amendment to Facilitate Leasehold Financing. Landlord hereby
                -------------------------------------------
agrees that if any Institutional Lender to whom Developer proposes to make a
Leasehold Mortgage on Developer's Leasehold Estate shall require as a condition
to making any loan secured by such mortgage that Landlord agree to modifications
of this Lease, then Landlord agrees that it will enter into an agreement with
Developer in recordable form making the modifications that are requested by such
lender, provided that such changes do not adversely affect any right of Landlord
under this Lease.

          4.13  Security Deposit.  If any Leasehold Mortgagee, its designee or
                ----------------
other purchaser has acquired the Leasehold Estate of Developer pursuant to
foreclosure, conveyance in lieu of foreclosure or other proceedings, or has
entered into a New Lease with Landlord in accordance with subsection 4.8, such
Leasehold Mortgagee, its designee or other purchaser shall succeed to the rights
of Developer, if any, in and to the security deposits paid by Developer to
Landlord pursuant to subsections 16.1 and 16.2. In such event, Developer shall
no longer have any rights to such security deposits, and Landlord shall hold
such security deposits

                                       38
<PAGE>
 
for and on behalf of such Leasehold Mortgagee, its designee or other purchaser.

          4.14  Estoppel Certificate.  Landlord shall at any time and from time
                --------------------
to time hereafter, but not more frequently than twice in any one-year period (or
more frequently if such request is made in connection with any sale or
mortgaging of Developer's Leasehold Interest or permitted subletting by
Developer), within ten (10) days after written request of Developer to do so,
certify by written instrument duly executed and acknowledged to any Mortgagee or
purchaser, or proposed Mortgagee or proposed purchaser, or any other person,
firm or corporation specified in such request:  (i) as to whether this Lease has
been supplemented or amended, and if so, the substance and manner of such
supplement or amendment; (ii) as to the validity and force and effect of this
Lease, in accordance with its tenor; (iii) as to the existence of any default
hereunder; (iv) as to the existence of any offsets, counter claims or defenses
hereto on the part of Developer; (v) as to the commencement and expiration dates
of the term of this Lease; and (vi) as to any other matters as may be reasonably
so requested.  Any such certificate may be relied upon by Developer and any
other person, firm or corporation to whom the same may be exhibited or
delivered, and the contents of such certificate shall be binding on Landlord.
Any party requesting such estoppel certificate shall reimburse Landlord for its
costs and expenses incurred in issuing such certificate.

          4.15  Notices.  Notices from Landlord to the Leasehold Mortgagee 
                -------
shall be mailed to the address furnished Landlord

                                      39
<PAGE>
 
pursuant to subsection 4.2 , and those from the Leasehold Mortgagee to Landlord
shall be mailed to the address designated pursuant to the provisions of
subsection 1.5.1 hereof, attention the General Manager.  Such notices, demands
and requests shall be given in the manner described in subsection 17.1 and shall
in all respects be governed by the provisions of that subsection.

          4.16  Erroneous Payments.  No payment made to Landlord by a Leasehold
                ------------------
Mortgagee shall constitute agreement that such payment was, in fact, due under
the terms of this Lease; and a Leasehold Mortgagee having made any payment to
Landlord pursuant to Landlord's wrongful, improper or mistaken notice or demand
shall be entitled to the return of any such payment or portion thereof provided
such Leasehold Mortgagee shall have made demand therefor not later than ninety
(90) days after the date of its payment.

          4.17  Request for Notice for Benefit of Landlord. Immediately after
                ------------------------------------------
recording any Leasehold Mortgage encumbering Developer's Leasehold Estate,
Developer, at Developer's expense, shall cause to be recorded in the Office of
the Recorder of Los Angeles County, California, a written request of notice
under Section 2924(b) of the California Civil Code providing that a copy of any
notice of default and a copy of any notice of sale under such Leasehold Mortgage
shall be delivered to Landlord as provided for under said Section 2924(b) of the
California Civil Code.  Such request shall be executed by Landlord.
Concurrently, with Developer's forwarding such notice for recordation, Developer
shall furnish to Landlord a complete copy of the Leasehold Mortgage and the note
secured thereby, together with the name and

                                      40
<PAGE>
 
address of the holder thereof.  Said note and mortgage are to be kept by
Landlord on a confidential basis to the extent permitted by law.

          4.18  Release or Forebearance.  If any such lender shall fail or
                -----------------------
refuse to comply with any and all of the conditions of this section, then and
thereupon Landlord shall be released from its covenant of forebearance with such
lender herein contained.

          4.19  Notice.  Landlord's obligation to observe its covenants of
                ------
forebearance in this section for the benefit of any lender on the security of
the Leasehold Estate, except as may be otherwise provided by law, shall be
conditioned upon there having been first delivered to the General Manager of the
Water Department of the City of Long Beach, a written notice of such encumbrance
which shall state the name and address of such lender for the purpose of
enabling notices to be given under subsection 4.2 above.

          4.20  No Merger.  No merger of Developer's Leasehold Estate into
                ---------
Landlord's fee title shall result by reason of the ownership of Landlord's or
Developer's estates by the same party or by reason of any other circumstances,
without the prior consent of any and all lenders on the security of the
Leasehold Estate.

          4.21  No Payment by Landlord.  Landlord shall not be required to
                ----------------------
execute any instrument which would obligate Landlord to the payment of any loan
or any part thereof.

          4.22  Self Liquidating Mortgage.  The Leasehold Mortgage shall be a
                -------------------------
self liquidating mortgage, to be paid over a period not longer than elapses up
to three (3) years prior to the

                                      41
<PAGE>
 
end of the term of this Lease, or any option term if such option has been 
exercised.

          4.23  Leasehold Mortgagee Need Not Cure Specified Defaults. Nothing 
                ----------------------------------------------------
herein contained shall require any Leasehold Mortgagee or its designee as a
condition to its exercise of right hereunder to cure any default of Developer
which cannot be cured by such Leasehold Mortgagee or its designee, in order to
comply with the provisions of subsections 4.6 or 4.7 or as a condition of
entering into the New Lease provided for by subsection 4.8.

          4.24  Casualty Loss.  A Standard Mortgagee Clause naming each Lease-
                -------------
hold Mortgagee may be added to any and all insurance policies required to be
carried by Developer hereunder on condition that the insurance proceeds are to
be applied in the manner specified in this Lease and the Leasehold Mortgage
shall so provide, except that the Leasehold Mortgage may provide a manner for
the disposition of such proceeds, if any, otherwise payable directly to
Developer.

       5. ASSIGNMENT AND SUBLETTING:
          -------------------------

          5.1  Prohibition Against Change in Ownership, Management and Control.
               ---------------------------------------------------------------
The qualifications and identities of Developer are of particular concern to
Landlord. It is because of those qualifications and identities that Landlord has
entered into this Lease with Developer. No voluntary or involuntary successor in
interest shall acquire any rights or powers under this Lease except as expressly
provided for in this Lease.

          Except as otherwise permitted by this Section 5 and subsection 1.5.3,
Developer shall not permit any significant

                                      42
<PAGE>
 
change (voluntary or involuntary) in the ownership, management or control of
Developer to occur unless such change is approved by Landlord, subject to the
requirements of this section and reasonable conditions imposed by Landlord.

          Except as otherwise permitted by this Section 5 and subsection 1.5.3,
Developer may not assign this Lease or any interest herein without first
obtaining the written consent of Landlord, pursuant to subsection 5.4 of this
Lease.  Any assignee shall assume and agree to perform the obligations of
Developer under this Lease.  Promptly following any permitted assignment,
Developer shall deliver to Landlord a copy of such assignment, together with a
statement setting forth the following information:

          5.1.1  Name and Address for Notices.  The name and address of the 
                 ----------------------------
     assignee for the purpose of enabling notices to be given.

          5.1.2  Type of Entity.  Whether the assignee is an individual, a 
                 --------------
     corporation, a partnership or a joint venture, and if such assignee is a
     corporation, the names of such corporation's principal officers and of its
     directors and State of incorporation, and if such assignee is a partnership
     or joint venture, the names and addresses of the general partners of such
     partnership or venture.

          5.1.3  Other Transfers.  In the event that Developer is a partner-
                 ---------------
     ship, joint venture or corporation, any assignment of twenty-five percent
     (25%) or more of the partnership or joint venture interest or outstanding
     capital stock of such an entity shall con-

                                      43
<PAGE>
 
     stitute an assignment by Developer of this Lease for the purposes of this
     Section 5 and shall not be permitted to occur without first obtaining the
     written consent of Landlord, which consent shall not unreasonably be
     withheld, delayed or conditioned.

          5.1.4  Buildings or Land.  In addition to all other assignments, 
                 -----------------
     which must be approved in advance by Landlord, any assignment of 50,000
     square feet of land or office space must be approved in advance by Landlord

          5.2 Assignments Not Subject to Approval.  The provisions of this
              -----------------------------------
Section 5 shall not be applicable to the following types of assignments and
transfers, which shall be permitted without the prior consent of Landlord.

          5.2.1  Death or Incapacity.  Assignments resulting from the death or 
                 -------------------
     mental or physical incapacity of an individual, provided, however, that any
     person replacing an individual who departs because of physical or mental
     disability shall have education and experience comparable to that of the
     person replaced.

          5.2.2  Family Transfer. A transfer or assignment for the benefit of a
                 ---------------
     spouse, children, grandchildren or other family members.

          5.2.3  Affiliated Corporation.  A transfer to an "Affiliated
                 ----------------------
     Corporation" as hereinafter defined. An "Affiliated Corporation" shall be
     (i) any corporation which owns fifty-one percent (51%) or more of the
     outstanding capital stock of the assigning corporation; or (ii) any
     corporation, fifty-one percent (51%) or more

                                       44
<PAGE>
 
     of the outstanding capital stock of which is owned by the assigning
     corporation; or (iii) any corporation, fifty-one percent (51%) or more of
     the outstanding capital stock of which is owned by a shareholder or group
     of shareholders who also owns at least fifty-one percent (51%) of the
     outstanding capital stock of the assigning corporation.

          5.2.4  IRS Transfer. A transfer of stock resulting from or in
                 ------------
     connection with a reorganization as contemplated by the provisions of the
     Internal Revenue Code of 1954, as amended, or otherwise, in which the
     ownership interests of a corporation are assigned directly or by operation
     of law to a person or persons, firm or corporation which acquires the
     control of the voting capital stock of such corporation or all or
     substantially all of the assets of such corporation.

          5.2.5  Public Entity. A transfer of stock in a publicly held
                 -------------
     corporation or of the beneficial interest in any publicly held partnership
     or real estate investment trust.

          5.2.6  Partner.  A transfer by a limited partner or joint venturer to
                 -------
     a partnership or joint venture in which the assignor is a partner or
     venturer.

          5.2.7  Comprising Entity.  A transfer or assignment from one partner
                 -----------------
     or joint venturer comprising Developer to another; or if Developer is a
     corporation from one shareholder to another.

                                      45
<PAGE>
 
          5.3 Assignment Invalid.  Any transfer or assignment to which
              ------------------
Landlord's consent is required by subsection 5.1 shall be void and shall confer
no right to occupancy upon the assignee unless and until such consent of
Landlord is obtained.  Such approval may be conditioned or refused in response
to the matters specified herein.

          5.4 Approval of Assignments.  Landlord agrees that it shall consent to
              -----------------------
an assignment to a subtenant and to an assignment which, at the time of such
assignment, is of such financial standing and responsibility as to give
reasonable assurance that the payment of all Ground Rent and other amounts
reserved in this Lease will be made in compliance with all the terms, covenants,
provisions and conditions of this Lease.  In requesting an approval by Landlord
of assignment pursuant to subsection 5.1, Developer shall provide the following
information to Landlord with respect to proposed assignments of 50,000 square
feet of rentable building area or land area, or more, of sublease space, with
respect to any Ground Sublease and with respect to assignments of a parcel or an
interest in this Ground Lease.

          5.4.1  Name.  Name and address of the assignee.
                 ----

          5.4.2  Description.  Description of the Premises to be assigned.
                 -----------

          5.4.3  Nature of Business.  The nature of the business conducted by 
                 ------------------
     assignee on the Premises to be assigned.

          5.4.4  Financial Information.  Financial strength of the subtenant or
                 ---------------------
     assignee (if the subtenant is a publicly held company, a copy of its most 
     recent

                                      46
<PAGE>
 
     annual report; if the subtenant or assignee will not disclose financial
     information, a report from recognized credit rating agency, such as Dun &
     Bradstreet).

          5.4.5  Officers.  The identity, background and experience of all
                 --------
     officers and directors of assignee, at executive vice president level and
     above and senior operational officer relating to the Premises, if a
     corporation or general partners of a partnership or sole proprietor of a
     proprietorship (Principals).

          5.4.6  Additional Information.  To the extent known by Developer, the
                 ----------------------
     following information:

              5.4.6.1  Criminal record of the subtenant assignee or any of the
     Principals.

              5.4.6.2  Nature and extent of litigation to which the subtenant,
     assignee or any Principal is a party.

              5.4.6.3  Any course of conduct which a prudent person would deem
     materially detrimental to the Project or to the intended use of the
     Premises by the subtenant or assignee.

          5.4.7  Informational Purposes.  For informational purposes only:
                 ----------------------

              5.4.7.1  Number of anticipated employees of the assignee.

              5.4.7.2  At the time of submission of the request, the terms and
     conditions of the assignment.

              5.4.7.3  With respect to all assignment copy thereof after
     execution by all parties thereto.

                                      47
<PAGE>
 
          5.4.8  Confidentiality.  If requested by Developer at the time of 
                 ---------------
     submission of the information described above, Landlord shall keep such
     information and the identity of the proposed sublessee or assignee
     confidential and Landlord shall execute a confidentiality statement so
     providing to the extent Landlord is permitted by law to do so.

          5.4.9  Disapproval by Landlord.  Landlord reserves the right to 
                 -----------------------
     reject any proposed assignee where the matters specified in 5.4.3, 5.4.4,
     5.4.5 or 5.4.6 above indicate that the presence of assignee would not be in
     the public interest or would adversely affect the financial viability of
     the Project. Landlord shall either approve or disapprove any proposed
     assignee within fifteen (15) days after receipt by Landlord of a request to
     do so. Failure of Landlord to act within said fifteen (15) days shall
     constitute approval. If Landlord does not approve any proposed assignee,
     Landlord shall state in writing the reasons for such disapproval. Developer
     shall have the right to challenge the validity of such disapproval. No
     damages shall be payable to Developer in any action arising from such
     disapproval unless Landlord shall have acted unreasonably or in bad faith
     or with actual malice.

          5.5 No Release.  Notwithstanding any assignment by Developer permitted
              ----------
by subsection 5.1 with Landlord's consent, and notwithstanding any assignment by
a partner or joint venturer of Developer permitted by subsection 5.1.3 with
Landlord's consent

                                      48
<PAGE>
 
or made without Landlord's consent pursuant to subsection 5.2, the assigning
party shall remain fully liable for the performance of all of the covenants to
be performed by Developer under this Lease prior to the effective date of such
assignment but Developer shall be released from liability with respect to the
performance of this Lease after the effective date of such assignment.
Landlord's approval of or consent to any such assignment or transfer shall not
be a waiver of any right to object to further or future assignments, and
Landlord's consent to each such successive assignment must be first obtained in
writing from Landlord unless otherwise permitted by this Lease without
Landlord's prioritsconsent.

          5.6 Unauthorized Change.  This Lease may be terminated by the Landlord
              -------------------
if there is any significant change (voluntary or involuntary) other than those
authorized in Section 5 or subsection 1.5.3 hereof, or not requiring Landlord's
approval of ownership, management or control of the Developer prior to the
completion of the development of the site, unless such changes have been
approved by the Landlord.

          5.7 Subletting.  Developer shall be entitled, with the prior written
              ----------
consent of Landlord, to sublet the wits hole or any portion of the Premises or
the improvements constructed thereon by or under Developer and, without limiting
the foregoing, may establish a leasehold condominium regime on the Premises, or
portions thereof, in accordance with the provisions of California law, including
California Civil Code Sections 783 and 1350-1360. Developer shall, at all times,
remain liable for the performance of all of the covenants on its part to be so
performed, notwith-

                                      49
<PAGE>
 
standing any subletting.  Each sublease shall be subject and subordinate not
only to this Lease, but also to any New Lease made by Landlord as provided in
Section 4.8 above.  If the term of this Lease shall end while any such sublease
is in effect, Landlord may, at its option, for a period of ninety (90) days
thereafter, either terminate the said sublease or succeed to all of the rights
of Developer thereunder.  Where any sublease which is consistent with this Lease
is approved, Landlord may grant to the subtenant, under such an approved
sublease entered into in good faith and for reasonable consideration, a right of
quiet enjoyment in recordable from (a "nondisturbance agreement") during the
term of the sublease, notwithstanding the expiration, termination or
cancellation of this Lease; provided that (i)) the term of the sublease, plus
extension or renewal options, does not extend beyond the term of this Lease,
plus extension options; (ii) such subtenant agrees that in the event this Lease
expires, terminates or is cancelled during the term of the sublease, the
sublease shall be deemed a direct lease between Landlord and such subtenant and
the subtenant shall attorn to Landlord.  In the event that Landlord objects to
any proposed nondisturbance agreement or sublease, Landlord agrees to notify
Developer in writing of such objection and of its reasons for such objection
within twenty (20) days of its receipt of the proposed nondisturbance agreement
and sublease.  Subject to the foregoing provisions of this subsection 5.7,
Landlord hereby approves generally of the form of nondisturbance agreement
attached hereto as Exhibit "C". Any approvals or grants of quiet enjoyment given
or made by Landlord pursuant to this subsection 5.7 shall be binding upon Land-

                                       50
<PAGE>
 
lord, its successors or assigns, including without limitation any person or
entity succeeding to the interest of Landlord by way of judicial foreclosure or
trustee sale proceedings pursuant to any mortgage or deed of trust, the lien or
charge of which is subject and subordinate to this Lease.

Any sublease, with respect to which Landlord agrees to execute a nondisturbance
agreement pursuant to this subsection 5.7, may be a sublease pursuant to which
the subtenant is responsible for the construction of the building improvements
upon the subleased premises (a "Ground Sublease" herein).  Any Ground Sublease
may contain a hypothecation provision similar to Section 4 of this Lease for the
benefit of the holder of any mortgage or deed of trust constituting a lien on
the subleasehold estate created by virtue of the Ground Sublease.  Any
nondisturbance agreement executed and delivered by Landlord for the benefit of
the sublessee under a Ground Sublease shall specifically recite that it is for
the benefit of any such holder of a deed of trust or mortgage constituting a
lien on the subleasehold estate created by such Ground Sublease; that the term
"sublease" as used in the nondisturbance agreement shall be deemed to include
any new sublease executed and delivered to any such holder of a first deed of
trust or first mortgage following a termination of the sublease pursuant to a
provision in the sublease similar to subsection 4.8 of this Lease, and that the
term " sublessee" under the nondisturbance agreement shall be deemed to include
any encumbrancer or other party succeeding to the sublessee under the Ground
Sublease by virtue of judicial or private power of sale foreclosure proceedings
or by delivery of an assignment in lieu

                                      51
<PAGE>
 
of foreclosure, or otherwise. Where Landlord agrees to execute a nondisturbance
agreement for the benefit of the sublessee under any Ground Sublease, such
agreement shall be subject to the obligations of the sublessee thereunder being
no less than the obligations of the Developer hereunder with respect to the
subleased premises.

          5.7.1  Minor Subleases.  Consent of Landlord shall not be required
                 ---------------
     to a sublease of any unit of space smaller than 50,000 square feet, not
     including parking areas; however, notice of any such sublease shall be sent
     to Landlord's Airport Manager within ten (10) days of the execution of the
     sublease.

          5.7.2  Consent to Sublease.  Prior to review of any proposed 
                 -------------------
     sublease, the following information and assurances shall be provided to
     Landlord as part of the request for consent to proposed subleases of 50,000
     square feet of rentable building area, or more,  of sublease space, with
     respect to any Ground Sublease:

                 5.7.2.1  Description.  Description of the sublease Premises.
                          -----------

                 5.7.2.2  Name.  The name and address of the sublessee for the
                          ----
            purpose of enabling notices to be given under subsection 17.1 
            hereof.

                 5.7.2.3 Nature of Business.  The nature of the business 
                         ------------------
            conducted on the sublease Premises.

                 5.7.2.4 Financial Information.  Financial strength of the
                         ---------------------
            subtenant or assignee (if the subtenant is a publicly held company, 
            a copy of its

                                      52
<PAGE>
 
            most recent annual report; if the subtenant or assignee will not 
            disclose financial information, a report from a recognized credit
            rating agency, such as Dun & Bradstreet).

                 5.7.2.5  Officers.  The identity, background and experience of
                          --------
            all officers and directors of sublessee, at executive vice president
            level and above and senior operational officer relating to the
            Premises, if sublessee is a corporation, general partners of a
            partnership or sole proprietor of a proprietorship (Principals).

                 5.7.2.6  Additional Information.  To the extent known by
                          ----------------------
            Developer, the following information:

                 5.7.2.6.1  Criminal record of the subtenant, assignee or any of
            the Principals.

                 5.7.2.6.2  Nature and extent of litigation to which the 
            subtenant, assignee or any Principal is a party.

                 5.7.2.6.3  Any course of conduct which a prudent person would 
            deem materially detrimental to the Project or to the intended use of
            the Premises by the subtenant or assignee.

                 5.7.2.7  Informational Purposes.  For informational purposes 
            only:         ----------------------

                 5.7.2.7.1  Number of anticipated employees of the subtenant or
            assignee.

                 5.7.2.7.2  At the time of submission of

                                      53
<PAGE>
 
            the request, the terms and conditions of the sublease or assignment.

                 5.7.2.7.3  With respect to all subleases and assignments a copy
            thereof after execution by all parties thereto.

                 5.7.2.7.4  Any proposed nondisturbance or attornment 
            agreements.


          5.7.3  Confidentiality.  If requested by Developer at the time of
                 ---------------
     submission of the information described above, Landlord shall keep such
     information and the identity of the proposed sublessee or assignee
     confidential and Landlord shall execute a confidentiality statement so
     providing, to the extent Landlord is permitted by law to do so.

          5.7.4  Disapproval by Landlord.  Landlord reserves the right to 
                 -----------------------
     reject any proposed sublessee where the matters specified in 5.7.2.3,
     5.7.2.4, 5.7.2.5 or 5.7.2.6 above indicate that the presence of sublessee
     would not be in the public interest or would adversely affect the financial
     viability of the Project. Landlord shall either approve or disapprove any
     proposed sublessee within fifteen (15) days after receipt by Landlord of a
     request to do so. Failure of Landlord to act within said fifteen (15) days
     shall constitute approval. If Landlord does not approve any proposed
     sublessee, it shall state in writing the reasons for such disapproval.
     Developer shall have the right to contest such disapproval. No damages
     shall be payable

                                      54
<PAGE>
 
     to Developer in any action challenging such disapproval unless Landlord
     shall have acted unreasonably, in bad faith or with actual malice.

          5.8 Sale of Buildings.  Developer shall have the right to sell
              -----------------
buildings constructed pursuant to the terms of this Lease, provided, however,
that such buildings shall be and remain subject to the terms and conditions of
this Lease.  No sale of such buildings shall be valid unless this requirement is
expressly included in the deed as a covenant running with the land.

          5.9 Master Lease.  Landlord agrees to assign, and Developer agrees to
              ------------
accept, all rights and obligations of Landlord with respect to the existing
three (3) leaseholds at the Premises, pursuant to the form of assignment
attached hereto and marked Exhibit "E".  Developer will hold Landlord and the
City of Long Beach, and all of their officers and employees, free and harmless
from any cost, expense, damage or claim of damage, including costs of defense,
arising from the interests or asserted interests of the existing tenants of any
such assigned leaseholds arising subsequent to the date of the assignment.
Landlord shall hold Developers free and harmless from any cost, expense, damage
or claim of damage including costs of defense, arising from acts or events
occurring prior to the date of such assignment, unless such damage or claim of
damage is caused or alleged to be caused by the assignment or any related
transaction.

          6.  INDEMNITY, INSURANCE, CASUALTY DAMAGE:
              -------------------------------------

              6.1  Indemnification and Hold Harmless.  Developer expressly
                   ---------------------------------
agrees to defend, protect, indemnify and hold harmless

                                      55
<PAGE>
 
the Landlord, its officers, agents and employees free and harmless from and
against any and all claims, demands, damages, expenses, losses or liability of
any kind or nature whatsoever which Landlord, its officers, agents or employees
may sustain or incur or which may be imposed upon them or any of them for injury
to or death of persons or damage to property arising out of or resulting from
the alleged acts or omissions of Developer, its officers, agents or employees or
in any manner connected with this Lease or with the occupancy, use or misuse of
the Premises by Developer, its officers, agents, employees, subtenants,
licensees, patrons or visitors.  Developer also agrees to defend at its own
cost, expense and risk all claims or legal actions that may be instituted
against Developer or Landlord with respect to the Premises, and the design and
construction of off-site improvements except traffic signals, and Developer
agrees to pay settlements and to satisfy any judgment that may be rendered
against either Developer or Landlord as a result of any injuries or damages
which are alleged to have resulted from or be connected with this Lease or the
occupancy or use of the Premises by Developer or its officers, agents,
employees, subtenants, licensees, patrons or visitors. Nothing herein shall be
deemed to require Developer to indemnify Landlord for liability determined by a
court of law to have arisen from negligence of Landlord, provided, however, that
as between the parties to this Lease, in any matter in which the doctrine of
joint and several liability applies, Landlord shall not be required to pay any
larger share of such judgment than its actual contribution as determined by the
Court.

                                      56
<PAGE>
 
             6.2  Insurance.
                  ---------

                  6.2.1  Liability Insurance.  At all times during the term of
                         -------------------
            this Lease, Developer shall obtain and maintain or cause to be
            obtained and maintained bodily injury and property damage insurance
            by a combined single limit policy in an amount of at least Ten
            Million Dollars and No/100 ($10,000,000.00) naming the Landlord and
            its officers, agents and employees as coinsureds with Developer and
            others designated by Developer. Developer shall also maintain
            workers' compensation insurance in the amount required by statute.

                  Prior to entry upon the Premises, and upon each insurance 
            renewal, Developer shall deliver the policies of insurance required
            by this subsection 6.2, or certified photostatic copies thereof, to
            Landlord for approval within 30 days as to sufficiency and for
            approval as to form by the City Attorney. When said policies of
            insurance have been so approved, Developer shall substitute a
            certificate of insurance issued by the insurance company or
            companies issuing such policies certifying that said insurance
            coverage is in full force and effect and upon the filing of said
            certificate, the policies will be returned by Landlord to Developer,
            if Developer has deposited the original policies with Landlord. Said
            liability and property damage insurance policy shall contain a
            provision or endorsement substantially as follows:

                                      57
<PAGE>
 
                   "The inclusion hereof of any person or entity as an insured
                   shall not affect any right such person or entity would have
                   as a claimant hereunder if not so included. This insurance
                   shall be primary and not contributing with any other
                   insurance maintained by Landlord."

                 Notwithstanding any other provision to the contrary contained 
            in this Lease, Developer shall not have the right to enter upon the
            Premises for any purpose whatsoever until such certificate has been
            filed with Landlord.

                 6.2.2   Fire and Extended Coverage.  Developer shall, at no 
                         --------------------------
            cost or expense to Landlord, keep insured for the benefit of
            Developer and Landlord, and such other parties, having an insurable
            interest, as Developer may designate, the improvements constructed
            by or under Developer upon the Premises against loss or damage by
            fire and lightning and risks customarily covered by extended
            coverage endorsement, in amounts not less than one hundred percent
            (100%) of the actual replacement cost of said improvements, except
            that Developer, at Developer's option may exclude the cost of
            excavations, foundations and footings. Landlord shall be named as an
            insured under any such policy. Such fire and extended coverage shall
            also be required to be furnished by Developer during the
            construction of improvements on the Premises as contemplated by
            Section 7 below. Any loss payable under such insurance shall be
            payable to

                                      58
<PAGE>
 
            Developer, Landlord and such other parties having an insurable
            interest in the property as Developer may designate and may be
            endorsed with a standard mortgagee's loss payable endorsement in
            favor of the holder of any Leasehold Mortgagee holding a Leasehold
            Mortgage. Landlord will release the entire sum of the proceeds to
            Developer or to a lender for purposes of reconstruction, replacement
            or repair of any damaged improvement. The proceeds of such insurance
            shall be paid to Developer to the extent the amount of the recovery
            is for damages to interior, non-structural or subtenant
            improvements, equipment, fixtures, personal property or for rental
            value insurance to the extent such recoveries are separate
            identifiable items. If Developer shall within five (5) years after
            such damage or destruction commence construction of the damaged or
            destroyed building, or a new building in accordance with Section 7
            hereof, the proceeds of any insurance payable by reason of such
            damage or destruction shall be paid to Developer. If Developer shall
            fail to commence such construction within such five (5) year period
            Landlord reserves the right to receive such portion of the insurance
            proceeds so that Landlord may, if appropriate, carry out such
            reconstruction of the destroyed building, with all excess amounts to
            Developer. If at any time during the last five (5) years of the term
            of the Lease whether the original term or any extension thereof, a
            building then on the Premises shall be so

                                      59
<PAGE>
 
            damaged by fire or other casualty that the cost of restoration shall
            exceed fifty percent (50%) of the replacement value thereof,
            exclusive of foundations, immediately prior to such damage, either
            party hereto may, within sixty (60) days of such damage, give notice
            of its election to terminate this Lease with respect to the parcel
            upon which the building is located and, subject to further
            provisions of this subsection this Lease shall cease and come to an
            end on the date of the expiration of ten (10) days from the delivery
            of such notice with the same force and effect as if such date was
            the date herein fixed for the expiration of the term hereof, and the
            Ground Rent shall be apportioned and paid to the date of such
            termination. In such event Developer shall remove all debris and
            level the land, and Developer shall have no obligation to repair or
            rebuild or restore. The insurance proceeds its shall then be divided
            as follows:

                 If five (5) years remain before the end of the Lease or any 
            extension thereof, Developer shall receive seventy-five percent
            (75%) of the proceeds, and Landlord shall receive twenty-five
            percent (25%); if four (4) years remain before the end of the Lease,
            Developer shall receive fifty percent (50%) of the proceeds, and
            Landlord shall receive fifty percent (50%); if three (3) years
            remain before the end of the Lease, Developer shall receive twenty-
            five percent (25%) of the proceeds, and Landlord shall receive
            seventy-five percent (75%);

                                      60
<PAGE>
 
            if two (2) years remain before the end of the Lease, Developer shall
            receive ten percent (10%) of the proceeds, and Landlord shall
            receive ninety percent if one (1) year remains before the end of the
            Lease, Landlord shall receive the entire proceeds.

                   6.2.3  Miscellaneous.  The insurance policies to be secured 
                          -------------
            by Developer pursuant to this subsection 6.2 shall be obtained from
            insurers having a rating in Best's Insurance Guide of A-10, or
            better (or a comparable rating in any similar Guide, if Best's Guide
            is no longer published or if Best's rating system changes), and
            shall require that the insurer give Landlord notice of any
            modification, termination or cancellation of any policy of insurance
            no less than thirty (30) days prior to the effective date of such
            modification, termination or cancellation. In addition, Developer
            shall notify Landlord of any modification, termination or
            cancellation of any policy of insurance secured by Developer
            pursuant to this subsection 6.2 as soon as Developer learns of any
            such modification, termination or cancellation. The policy of public
            liability and property damage insurance to be obtained under
            subsection 6.2.1 above shall stipulate that said policy provides
            primary coverage and is not subordinate to nor contributing with any
            other insurance coverage held or maintained by Landlord. The
            procuring of any such policy of insurance shall not be construed to
            be a limitation upon Developer's liability or its full

                                      61
<PAGE>
 
            performance on Developer's part of the indemnification and hold
            harmless provisions of this Lease; and Developer understands and
            agrees that notwithstanding any such policy of insurance,
            Developer's obligation to protect, indemnify and hold harmless
            Landlord under this Lease is for the full and total amount of any
            damage, injuries, loss, expense, costs or liabilities caused by or
            in any manner connected with or attributed to the acts or omission
            of Developer, its officers, agents, employees, licensees, patrons or
            visitors, or the operations conducted by Developer, or Developer's
            use or misuse of the Premises, except to the extent resulting from
            the negligent or willful acts of Landlord or any such indemnitee.

                   6.2.4  Blanket Policies.  Nothing contained in this section 
                          ----------------
            shall prevent Developer from requiring its subtenants, or any of
            them, or any other third party, to provide the insurance required by
            this Section 6, nor prevent Developer, or any of its subtenants, or
            any its such third party from taking out insurance of the kind
            provided for under this section under a blanket insurance policy or
            policies which cover other personal and real property owned or
            operated by Developer or any subtenant provided that the protection
            afforded Landlord and Developer under any policy of blanket
            insurance hereunder shall be no less than that which would have been
            afforded under a separate policy or policies relating only to the
            Premises.

                                      62
<PAGE>
 
                   6.2.5  Self-Insurance.  If a subtenant is self-insured as a 
                          --------------
            matter of such subtenant's usual and customary business policy and
            such self-insurance is accepted by institutional lenders, Developer
            may request Landlord to waive the insurance requirement and to
            consent and permit such subtenant to self-insure. Such request shall
            be accompanied by information deemed necessary by Landlord to review
            the request. Consent to self-insure shall not be unreasonably
            withheld if the conditions specified in this section have been met.

                   6.2.6  Insurance Adjustments.  The amounts of insurance 
                          ---------------------
            specified in subsections 6.2.1 and 6.2.3 may be adjusted in the year
            2000 and not more often then every third year thereafter for the
            duration of the Lease to take into account circumstances at the time
            of such adjustments.

              6.3  Damage or Destruction.
                   ---------------------

                   6.3.1  Restoration of Premises.  If any building or improve-
                          -----------------------
            ment on the Premises is totally or partially destroyed or damaged as
            a result of any casualty, Developer shall promptly repair, replace
            or rebuild such building or other improvement at least to the extent
            of its value immediately prior to such occurrence, subject, however,
            to delays resulting from force majeure, the cancellation of existing
            leases due to such casualty, settling with insurers and/or
            negotiating new financing if necessary. If less than twenty (20)
            years remain of the term of this Lease or any

                                      63
<PAGE>
 
            extension thereof, Developer may remove all damaged or destroyed
            improvements and place the portions of the Premises from which
            improvements are removed in a clean and level condition following
            which all insurance proceeds attributable to such destruction or
            damage shall be the property of Developer. After the commencement of
            such repair, replacement or rebuilding Developer shall continue such
            work with reasonable diligence until completion. Developer may cause
            any such work to be performed by or under its subtenants. In no
            event shall Landlord be liable to Developer for any damages
            resulting to Developer from the happening of any such fire or other
            casualty or from the repair or reconstruction of the Premises or
            from the termination of this Lease as provided in subsection 6.3.2
            below.

                   6.3.2  Right to Terminate.  Notwithstanding the provisions of
                          ------------------
            subsection 6.3.1 above, if the buildings and improvements on the
            Premises shall be damaged or destroyed as a result of a hazard
            against which Developer is not required to carry insurance to an
            extent in excess of fifty percent (50%), or more of their then
            insurable value, or if such damage or destruction shall occur during
            the last ten (10) years of the term of this Lease or during the last
            ten (10) years of any extended term of this Lease, then Developer
            shall have the right to elect not to repair, replace or rebuild such
            casualty damage and to cancel this Lease by giving written notice
            thereof to Landlord

                                      64
<PAGE>
 
            within three hundred sixty-five (365) days after the date of any
            such damage or destruction. Upon such termination, it will be the
            obligation of Developer to remove all damaged or destroyed
            improvements and to place the portions of the Premises from which
            improvements are removed in a clean and level condition.

                   6.3.3.  No Reduction in Rent.  In case of destruction, there
                           --------------------
            shall be no abatement or reduction of rent.



            7.   DEVELOPMENT OF THE PROJECT:
                 --------------------------

                 7.1  Scope of Development.  The Project will be a business, 
                      --------------------
office, research and development and industrial park. It is agreed by the
parties that the Project will be built to include one (1) or more buildings upon
the Premises, no one of which shall exceed the height limits established by
Federal Aviation Regulations (FAR). However, it is recognized that the scope of
development may be changed, enlarged or redistributed to meet a subtenant's or
user's needs or changed conditions. The facade treatment, landscaping and
character of the development will be substantially as proposed in the Long Beach
Airport Center submittal of December 7, 1983, as supplemented by a spiral bound
document entitled "Supplement to Kilroy Industries, December 7, 1983, Proposal",
and included therein is a transmittal letter from Kilroy Industries to the City
of Long Beach, dated January 12, 1984, ("Developer's Long Beach Airport Center
Submittal") on file in the offices of the Director of Community Development of
the City of Long Beach, or the equivalent of the

                                      65
<PAGE>
 
submitted proposal if approved by Landlord pursuant to subsection 7.3 hereof.

                 7.2 Developer's obligation to Develop Premises. Developer
                     ------------------------------------------
agrees to commence the construction of improvements upon the Premises as an
orderly development in conjunction with the development of the adjoining
property leased from the City of Long Beach. Developer shall undertake as
expeditiously and fully as is reasonably possible in the exercise of sound
business judgment, the planning and construction of improvements upon Premises
and to further the interest thereof to the end that there will be ultimately
constructed on the Premises the development contemplated the Basic Concept
Documents or its alternative as approved by Landlord pursuant to subsection
7.3.7.

          In the event Developer has not commenced construction on the Premises
by January 1, 1995, then the fair market rental value of the Premises shall be
adjusted in the manner set forth in subsection 3.2, as of January, 1995, upon
the assumption its that any building or buildings or other material improvements
planned for construction upon Premises had, in fact, been completed, unless the
provisions of section 3.1.3 shall apply.

                   7.2.1 Best Efforts to Sublease. Developer shall at all times
                         ------------------------
            use its best efforts to expedite to the fullest extent consistent
            with the exercise of sound business the making and entering into of
            sub-leases with subtenants upon terms and conditions satisfactory to
            subtenants and not inconsistent with any of the requirements of this
            Lease.

                                      66
<PAGE>
 
           7.3  Architectural Approval.
                ----------------------

                   7.3.1  Restriction.  No buildings or other improvements, 
                          -----------
          including without limitation, grading street, landscaping and parking
          area improvements shall be constructed or maintained upon the Premises
          unless the same conform to and are consistent with the zoning for the
          site, building code requirements and other adopted construction
          standards for public improvements of the City of Long Beach and the
          scope of the Project, as defined in subsection 7.1 above, and are
          approved by Landlord as provided in subsection 7.3.7 below.

                   7.3.2  Basic Concept Documents. Landlord and the City of Long
                          -----------------------
          Beach have heretofore approved certain documents, including
          preliminary Parcel Map No. 16960. Said documents, as the same may from
          time to time be modified and/or supplemented with the approval of
          Landlord pursuant to subsection 7.3.7 below are herein referred to as
          the "Basic Concept Documents.

                   7.3.3  Landscaping.  Prior to the construction of any 
                          -----------
          landscaping upon the Premises, Developer shall prepare and submit to
          Landlord for Landlord's approval pursuant to subsection 7.3.7 below
          preliminary landscape plans for such work. Following Landlord's
          approval of Developer's preliminary landscape plans for such work and
          prior to the commencement of such work, Developer shall prepare and
          submit to Landlord for Landlord's approval pursuant to subsection
          7.3.7 below final landscape plans for such work. Said landscape plans
          need

                                      67
<PAGE>
 
          not include landscaping between building walls and adjacent curbs
          and/or parking areas, it being understood that preliminary and final
          plans for such landscaping may be submitted separately by Developer to
          Landlord for Landlord's approval under subsection 7.3.7 below when the
          requirements of building occupants have been ascertained. Said
          landscape plans shall be consistent with the Basic Concept Documents
          and/or modifications or amendments thereto from time to time approved
          by Landlord. In general, Developer shall be permitted freedom of
          selection of landscaping plants, trees and other materials consistent
          with the Basic Concept Documents.

                 7.3.4  Exterior Elevations.  Prior to the construction of any 
                        -------------------
          building improvements upon the Premises, Developer shall prepare and
          submit to Landlord for Landlord's approval pursuant to subsection
          7.3.7 below exterior elevations for such building improvements. Such
          exterior elevations need not include exterior building signs. The
          exterior elevations utilized by Developer in the construction of
          buildings upon the land leased by Developer under the existing City of
          Long Beach Ground Lease have been approved in concept by Landlord for
          purposes of this Lease and for no other purposes.

                 7.3.5  Security and Security Plans.  Developer shall submit 
                        ---------------------------
          to the Landlord for approval a site security plan, if required, both
          for the construction period and for the Project as partially and fully

                                      68
<PAGE>
 
          developed which shall comply with applicable Federal Aviation
          Regulations and the requirements of the Airport Manager of the City of
          Long Beach. Developer shall comply with FAR Part 107 regarding Airport
          security and FAR Part 77 regarding height limitations. It is
          particularly important that Developer notify the Airport Manager and
          such other persons as he may direct twenty-four (24) hours in advance
          of erecting cranes on the Premises for any purpose. Developer shall
          pay any fine or penalty imposed on Landlord as a result of security
          violations on the Premises. Developer shall have the right to contest
          such fine or penalty.

                 7.3.6  Amendments.  Developer may from time to time submit to 
                        ----------
          Landlord for Landlord's approval pursuant to subsection 7.3.7 below
          modifications and/or amendments to any of the items described in
          subsections 7.3.3 through 7.3.5 above theretofore approved by
          Landlord.

                 7.3.7  Landlord Approval.  Developer shall submit all plans 
                        -----------------
          required by subsections 7.3 and 3.7 to Landlord, attention General
          Manager, who shall coordinate the review and approval of such plans
          with appropriate departments of the City of Long Beach. Landlord shall
          either approve or disapprove of any item submitted for approval to
          Landlord by Developer pursuant to subsections 7.3.3 through 7.3.6
          above and subsection 3.7 within fifteen (15) days of Landlord's
          receipt thereof by giving written notice of such approval or

                                      69
<PAGE>
 
          disapproval to Developer. Any such disapproval shall state in writing
          the reasons for disapproval. Failure by Landlord to expressly so
          disapprove of any such item within such fifteen (15) day period shall
          constitute Landlord's approval of such item.

                 The criteria to be used by Landlord in approving or 
          disapproving any such item shall be (i) compliance with the Basic
          Concept Documents and PD-2 zoning, ii) exterior aesthetics, (iii)
          consistency with prior improvement on the Premises or the adjacent
          premises leased by Developer from the City of Long Beach, (iv)
          relationship of improvements to adjacent land, including public 
          rights-of-way, (v) the general function of the spaces within the
          Project between building areas and adjacent public rights-of-way,
          consistent with overall project design. In general, Developer shall be
          permitted freedom of design of all exteriors.

                 In the event Landlord disapproves of any such item, Developer 
          may cause such item to be appropriately revised and resubmit the same
          to Landlord for approval pursuant to this subsection 7.3.7. Landlord
          and Developer agree to cooperate reasonably each with the other in
          resolving any objections of the other to such item and/or requested
          modifications by the other party.

                 The provisions of this section with respect to notice, time 
          for and method of approval shall apply to any such revised item
          resubmitted to Landlord for approval. Upon the approval of any such
          item, Landlord

                                      70
<PAGE>
 
          shall execute and return a copy of such item to Developer marked 
          approved by Landlord with the date of such approval.

                 Any item to be approved or disapproved by Landlord shall be 
          deemed to have been submitted to and received by Landlord on the date
          such item is delivered to or received at the office of the Director of
          Community Development of Landlord.

                 7.3.8  Communication and Consultation.  Landlord and Developer
                        ------------------------------
          agree to communicate and consult informally as frequently as is
          necessary to insure that the formal submittal of any item pursuant to
          this section can receive prompt and speedy consideration. In addition,
          during the period that Developer is preparing drawings and
          specifications for buildings and other improvements to the Premises,
          Landlord agrees, upon request of Developer, to schedule and hold
          regular progress meetings in order to coordinate the compliance of
          such drawings and specifications with the construction requirements of
          this Lease.

                 7.3.9  Requirements of Institutional Lender or Major Occupant.
                        ------------------------------------------------------
          If any revisions or corrections of drawings and specifications,
          landscape and grading plans and/or site plans consistent with the
          items heretofore approved by Landlord or approved by Landlord pursuant
          to this section are required by any institutional lender providing or
          proposing to provide financing to Developer or major occupant or
          proposed major occupant for a

                                      71
<PAGE>
 
          building, Developer and Landlord shall cooperate with each other in
          efforts to obtain the waiver of such requirements or to develop a
          mutually acceptable alternative. A major occupant shall be deemed a
          person or entity occupying or proposed to occupy all of a freestanding
          building or in excess of 50,000 square feet of building floor area
          upon initial occupancy. If no such waiver is obtained and no such
          alternative is developed, Landlord shall amend the items so approved
          by Landlord pursuant to this section as may reasonably be required for
          consistency with such revisions or corrections. Any amendment of items
          approved by the Landlord does not constitute a waiver of other legal,
          governmental approvals.

                 7.3.10  Interior Improvements.  During the term hereof, 
                         ---------------------
          Developer shall have the right to make, at no expense to Landlord,
          interior improvements to any building, and thereafter to make changes,
          alterations, further improvements and additions in and to the interior
          of any building as Developer may desire, subject to all applicable
          codes, ordinances and statutes.

                 7.3.11  Modification of Plans.  Developer may make changes and
                         ---------------------
          modifications to plans and specifications for buildings which are not
          material or to resolve an inconsistency or ambiguity without obtaining
          Landlord's prior approval. Landlord agrees that Developer may cause
          the plans for any building to be modified to the extent required to
          adapt the same to soil or other

                                      72
<PAGE>
 
          conditions found on the Premises and to the extent modification
          thereof is required by any governmental agencies or authorities having
          jurisdiction to approve such plans, all without resubmitting the same
          to Landlord for Landlord's reapproval.

                 7.4  Performance and Payment Bonds.
                      -----------------------------

                      7.4.1  Agreement to Provide.  On or before the date of 
                             --------------------
          commencement of construction of any building, structure or other
          improvements on the Premises having an estimated cost of One Million
          and No/lOO Dollars ($1,000,000.00) or greater, Developer shall file or
          cause to be filed with Landlord a performance bond and labor and
          material payment bond executed by Developer or Developer's contractor
          or subtenant, as principal, and by a surety authorized to do business
          in the State of California, as surety, conditioned upon the
          contractor's performance of its construction contract with Developer
          and payment to all claimants for labor and materials used or
          reasonably required for use in the performance of such contract, in a
          form and with a surety reasonably acceptable to Landlord. Forms of
          bond which generally are acceptable hereunder are attached hereto and
          marked Exhibit "D". Said bond shall name or be endorsed to name
          Landlord as a joint obligee with Developer and/or Developer and
          Developer's lender. Landlord agrees to either approve or disapprove of
          any such proposed bond submitted to Landlord for approval within ten
          (10) days of Landlord's receipt

                                      73
<PAGE>
 
          thereof. Any notice of disapproval shall specify the reasons for
          disapproval and the modifications required to secure Landlord's
          approval. Landlord's failure to expressly so disapprove of any such
          bond within said ten (10) day period shall constitute Landlord's
          approval of the form of such bond and of the surety issuing such bond.

                   7.4.2  Term of the Bond.  The term of both bonds shall 
                          ----------------
          commence on or before the date of filing with Landlord. The
          Performance Bond shall remain in effect until the date of completion
          of the work to the reasonable satisfaction of Landlord and the
          obtaining of a final Certificate of Occupancy from the City of Long
          Beach. The Payment Bond shall remain in effect until the expiration of
          the period of filing a claim of lien as provided in Title 15 of Part 4
          of the California Civil Code, and as hereafter amended, or if a claim
          of lien is filed, the expiration of the period for filing an action to
          foreclose such lien, or until the Premises are freed from the effect
          of such claim of lien and any action brought to foreclose such lien
          pursuant to the provisions of said Title 15 of Part 4 or the lien is
          otherwise discharged.

                   7.4.3  Penal Sum.  The Performance Bond shall be in the 
                          ---------
          amount and provide a penalty of one hundred percent (100%) of the cost
          of the improvements to be constructed as such cost shall be determined
          by the Developer. The Payment Bond shall be in the amount and

                                      74
<PAGE>
 
          provide a penalty of one hundred percent (100%) of the valuation of 
          the improvements to be constructed.

                   7.4.4  Alternative Performance.  In lieu of the Performance 
                          -----------------------
          Bond and Payment Bond required by this subsection 7.4, Developer may
          furnish cash, assignment of account, or a time certificate of deposit
          or irrevocable letter of credit conditioned only on the terms of this
          Lease or such other form of security as may be agreed upon by the
          patties.


             7.5  Construction.
                  ------------

                   7.5.1  Costs of Construction.  Except as provided in 
                          ---------------------
          subsections 3.8, 3.9, and 7.5.10, the entire cost and expense of
          constructing any and all improvements on the Premises, including
          without limitation any and all on and off-site improvements required
          by applicable governmental authorities under applicable zoning
          ordinances or as a condition to parcel or final map approvals, shall
          be borne and paid by Developer, or its subtenants, and Developer shall
          hold and save Landlord and the Premises harmless from any liability
          whatsoever on account thereof.

                   7.5.2  Right to Improve.  Developer shall have the right to 
                          ----------------
          construct buildings and other improvements upon the Premises and shall
          have the right to change the grade of the Premises and to perform all
          off-site work included within the scope and intent of the Basic
          Concept Documents and/or to demolish and remove any and

                                      75
<PAGE>
 
          all structures, foliage and trees situated upon the Premises as of the
          date of this Lease as may reasonably be required for the purpose of
          improving the same incidental to Developer's or a subtenant's use of
          the Premises; provided, that such work shall be performed in
          accordance with the applicable requirements of this Section 7, and
          such laws of any governmental entity as may be applicable thereto and
          that arrangements for access to adjacent leaseholds are completed
          prior to commencement of work on those areas. Any and all
          improvements, constructed by or for the Developer, except off-site
          improvements, shall be owned by Developer and its successors or
          assigns during the term of this Lease and, unless removed by Developer
          upon the expiration of the term of this Lease as permitted by
          subsection 17.10 below, shall become a part of the realty and the
          absolute property of Landlord upon the expiration or earlier
          termination of the term of this Lease.

                   7.5.3  Governmental Permits.  Before commencement of 
                          --------------------
          construction or development of any buildings, structures, or other
          work or improvements upon the Premises or within the Project area,
          Developer shall, at its own expense with the cooperation of Landlord,
          secure or cause to be secured any and all permits which may be
          required by the City of Long Beach or any other governmental agency
          having authority over such construction, development or work.
          Developer shall provide a copy of each such permit to the Landlord
          prior to com-

                                      76
<PAGE>
 
          mencing the subject work or activity.

                   7.5.4  Rights of Access.  For the purposes of assuring 
                          ----------------
          compliance with this Lease, representatives of Landlord in addition to
          those conducting inspections required by Landlord, shall have the
          right of access to the Premises without charges or fees, at normal
          construction hours, during the period of construction for the purposes
          of this Lease, including but not limited to the inspection of the work
          being performed in constructing the improvements required by this
          Lease. Such representatives of Landlord shall be those who are so
          identified in writing by the General Manager of Landlord except that
          those employees of the City of Long Beach conducting inspections
          required by law need not be so identified.

                   7.5.5  Local, State and Federal Laws.  Developer shall carry 
                          -----------------------------
          out or cause to be carried out the construction of any buildings,
          structures or other work or improvements upon the Premises in
          conformity with all applicable laws. Any buildings, structures or
          other improvements constructed or placed upon the Premises by or under
          Developer, shall be constructed or placed in accordance with the laws
          and regulations of the State of California and of the City of Long
          Beach applicable to the Premises. Any applicable Federal Aviation
          Regulation (FAR) shall also be complied with.

                   7.5.6  Antidiscrimination During Construction. Developer for 
                          --------------------------------------
          itself and its successors and assigns

                                      77
<PAGE>
 
          agrees that in the construction of any improvements provided for in
          this Lease, that Developer will not discriminate against any employee,
          or applicant for employment because of age, sex, marital status, race,
          handicaps, color, religion, creed, ancestry or national origin.

              7.5.7  Responsibilities of Landlord.
                     ----------------------------

                   7.5.7.1  Governmental Approvals.  Landlord will assist 
                            ----------------------
          and cooperate with Developer in connection with requests by Developer
          for lot line adjustments, tentative or final, parcel, tract or
          subdivision map approval, condominium plan approval, variances and any
          other governmental approvals necessary for or which will facilitate
          the development of the Premises, pursuant to this Lease including,
          without limitation, the execution of documents required to dedicate or
          offer for dedication or restrict or otherwise encumber or subdivide by
          parcel or final maps or condominium plans portions of the Premises as
          may be required by applicable governmental authorities.

                   7.5.7.2  Easements.  Landlord agrees to join in granting 
                            ---------
          or dedicating such public or private utility company easements as may
          be required for the development of the Premises, for which no
          consideration is given. With the exception of landscaping and
          appurtenant structures as provided in subsection 7.5.9, Developer
          shall have no re-

                                      78
<PAGE>
 
          sponsibility for maintaining public rights-of-way, sewers, storm
          drains and other facilities after dedication of same to the City of
          Long Beach by Developer.

                   7.5.7.3  Off-Site Improvements.  Subject to any 
                            ---------------------
          limitation of law, Landlord shall take all such action as is necessary
          and prudent in order to permit Developer to install and construct the
          off-site improvements which are necessary to initially make the
          Premises suitable for development according to Developer's Basic
          Concept Documents. The costs of certain improvements shall be included
          in Offsite Costs in the manner set out in subsections 3.6 through
          3.10.

                   7.5.7.4  Bond Financing.  Landlord further agrees to 
                            --------------
          assist with Developer's financing of the development of the Premises
          by cooperating reasonably with Developer and using reasonable efforts
          to sell or to cause any appropriate agency of the City of Long Beach
          to sell industrial development bonds as a source for such financing,
          if such action is legally permissible; by granting to or for the
          benefit of the holders of any special assessment or district bonds
          constituting a first lien on Developer's Leasehold Estate, or their
          trustee, rights and remedies of a similar nature afforded Leasehold
          Mortgagees under Section 4 hereof.

                                      79
<PAGE>
 
                       7.5.7.5  Hazardous Materials.  Landlord shall, within a 
                                -------------------
          reasonable time and at its expense, remove any hazardous material on
          Parcels A and B. Said removal shall be completed prior to commencement
          of Initial Ground Rental.

                   7.5.8  Responsibilities of Developer.  Developer, without 
                          -----------------------------
          expense to Landlord, shall perform all work specified of Developer in
          this Lease. In addition, Developer shall furnish Landlord with semi-
          annual progress reports demonstrating good faith compliance with the
          construction requirements of this Lease on or before each semi-annual
          period commencing with the sixth month anniversary of the date of this
          Lease, through the occurrence of the completion date of such
          construction.

                   7.5.9  Maintenance.  In addition to the responsibilities 
                          -----------
          mentioned herein, Developer shall have sole and exclusive
          responsibility for maintaining the Premises and all building
          structures and improvements which may be constructed upon the Premises
          in good condition and repair, at no cost or expense to Landlord,
          reasonable wear and tear excepted. Developer shall also maintain all
          landscaping and appurtenant structures installed in accordance with
          plans approved pursuant to Section 7. Landlord will consider a request
          to maintain landscaping in public rights-of-way.

                   7.5.10  Acceptance of Premises.  Developer accepts the 
                           ----------------------
          Premises in an "as-is condition, except

                                      80
<PAGE>
 
           for subsurface toxic waste, hazardous materials and munitions, which
           are the responsibility of Landlord to remove at Landlord's expense,
           and also except for subsurface facilities of Landlord which are to
           remain and which are to be maintained by Landlord. Developer
           acknowledges that Developer has not received and Landlord has not
           made any warranty, express or implied, as to the condition of the
           Premises. Developer agrees to bear all expenses incurred in the
           development, operation and maintenance of the Premises, except for
           improvements and facilities dedicated for public use to the City of
           Long Beach or to other governmental authority, and except for removal
           and disposition of subsurface hazardous materials and munitions and
           subsurface facilities of Landlord which are to be retained by
           Landlord.



               7.6 Subdivided Leases.  For the purpose of facilitating the
                   -----------------      
development of the Project and obtaining financing and refinancing of
improvements to be constructed thereon, at any time and from time to time during
the term, within thirty (30) days after notice of demand from Developer,
Landlord shall enter into separate new leases ("Subdivided Lease") so that there
shall be one lease for each developable parcel in the Premises. The Subdivided
Leases described herein shall be for the sole purpose of lease, sale or
financing of the development. In all matters affecting the relationship, rights
or obligations of the parties hereto, or in the case of any inconsistency
between 

                                      81
<PAGE>
 
the language of the documents, this Lease as undivided and unmodified shall
govern except that as to the individual subdivided lease parcels, rents,
security deposits, legal descriptions and requirements governing amount and
level of construction may be varied to conform to the specifics of such parcel,
as long as the totals in all such categories for all subdivided leases added
together correspond to the totals expressed in this document. Developer shall
pay to Landlord as a separate charge apart from rents a one time charge, payable
in advance to reimburse Landlord's costs and expenses in separating the leases
and reviewing and administering all the leases as separated in the sum of Five
Thousand Dollars ($5,000.00).  Each Subdivided Lease shall:

               7.6.1  Same Parties.  Have the same parties as the parties to
                      ------------    
           this Lease.

               7.6.2  Obligations of Subdivided Leases.  Be released from
                      --------------------------------          
           the overall obligations expressed in this Lease to pay rent and to
           carry out specific levels of construction within specific periods,
           provided, however that each such parcel shall be subject to an
           appropriate proportionate share of such obligations such that the
           total of such obligations divided among separated leases is not less
           than the total of such obligations expressed in this Lease. All other
           obligations imposed by this Lease shall apply to each such separate
           parcel as an undivided shared obligation. As to any conflict between
           the Subdivided Leases or all of them and this Lease, the terms of
           this Lease shall govern.

               7.6.3  Terms, Covenants.  Contain the same
                      ----------------

                                       82
<PAGE>
 
           terms, covenants, provisions, conditions and agreements as those
           contained in this Lease except that:

               7.6.3.1  Ground Rent.  The Ground Rent and other periodic 
                        ----------- 
           payments to be made by Developer as part of Developer's obligation
           under this Lease and the security deposit under subsection 16.1
           shall, under the Subdivided Lease, bear substantially the same
           proportion to amounts provided in this Lease as the area of the
           Premises in the Subdivided Lease bears to the area of the Premises in
           this Lease. Provided, however, that if the fair market value of any
           land included in a Subdivided Lease is substantially greater or less
           than the balance of the land included in this Lease, then the Ground
           Rent may be appropriately varied between the Subdivided Lease and
           this Lease in order to take into account such variance in the fair
           market land value.

               7.6.3.2  Improvements.  Any improvements constructed upon the 
                        ------------
           Premises demised by a Subdivided Lease shall satisfy Developer's
           obligations imposed by this Lease. The right of Developer to make
           improvements shall be apportioned around the Subdivided Leases
           substantially as is provided in subsection 7.6.3.1.

               7.6.3.3  Easements and CC & R's.  Each Subdivided Lease shall 
                        ---------------------- 
           contain all cross-easements, covenants, conditions, restrictions and
           agreements requested by Developer, and approved by Landlord,

                                      83
<PAGE>
 
           provided they reasonably facilitate separating this Lease into
           individual Subdivided Leases within the overall intent of this Lease.

                   7.6.3.4  Description of Property.  Each Subdivided Lease
                            -----------------------          
           shall cover only that portion of the Premises specified by Developer
           in Developer's notice of demand, provided that Developer shall
           accompany each notice of demand with an accurate survey and metes and
           bounds description of the portion of the Premises to be covered by
           the Subdivided Lease; or if the Premises have been divided into
           separate parcels, with the appropriate parcel map description of such
           Premises.

                   7.6.3.5 Excluded Matters. Obligations under this Lease which
                           ----------------
           have been satisfied or which are not applicable shall be excluded
           from a Subdivided Lease.



                   7.7 Combining Leases. At any time and from time to time after
                       ----------------
the execution of any such Subdivided Lease, within thirty (30) days after notice
of demand from Developer, Landlord shall enter into a single lease ("Single
Lease") combining any two or more of the Subdivided Leases, covering all the
portions of the Premises covered by the component Subdivided Leases, and
containing the same terms, covenants, provisions, conditions and agreements as
those contained in the component Subdivided Leases, except that:

                                       84
<PAGE>
 
                   7.7.1  Ground Rent.  The Ground Rent and other periodic
                          -----------           
           payments to be made by Developer as part of Developer's obligation
           under the Single Lease shall be the sum of the Ground Rent and other
           periodic payments payable under the component Subdivided Leases;

                   7.7.2  Easements and CC & R's.  The Single Lease shall 
                          ----------------------
           contain all cross easements, covenants, conditions, restrictions and
           agreements requested by Developer and approved by Landlord provided
           they reasonably facilitate combining the component Subdivided Leases
           and integrating the operation of the Single Lease with that of any
           Subdivided Leases still outstanding within the overall intent of this
           Lease.



          8.  USE:
              ---

              8.1 Permitted Development.  The Project shall be a business, 
                  ---------------------
office, research and development and industrial park, with offices and
facilities and space for sublease to subtenants. Developer may, on an interim
basis, continue all businesses and uses now being conducted on the Premises.
This shall have no effect on the rent required to be paid under this Lease.

              8.2 Vehicle Parking.  No vehicle not related to or used in the
                  ---------------
business of Developer or its subtenants or their respective employees, agents,
guests or invitees shall be parked on the Premises for any period greater than
twenty-four (24) hours.


                                       85
<PAGE>
 
           8.3 Federal Aviation Administration.  Use of the Premises shall
               -------------------------------         
conform to and be limited by applicable zoning regulations, any conditions
lawfully imposed by duly empowered governmental authority having jurisdiction
over the Premises, the terms, covenants, conditions and restrictions imposed by
this Lease and such lawful rules and regulations of the Federal Aviation
Administration ("FAA") as may be applicable from time to time to the Premises.
Landlord shall cooperate fully with Developer in obtaining all required FAA
approvals.

           8.4 Inspection.  At all times during the term of this Lease, Landlord
               ----------
shall retain the right of access to and ingress and egress over the Premises to
inspect aviation related operations and to enforce codes or ordinances and
provisions of this Lease, subject to governmental and reasonable subtenant
security requirements.


          9.  LIENS:
              -----
              9.1 Developer's Responsibility.  Developer shall not permit any 
                  -------------------------- 
liens to be enforced against Landlord's interests in and to the land comprising
the Premises, nor against Developer's leasehold interest therein by reason of
work, labor, services or materials supplied or claimed to have been supplied to
Developer or anyone holding the Premises, or any part thereof, through or under
Developer, and Developer agrees to indemnify Landlord against such liens.

              9.2 Notice of Work.  Before any buildings, structures or other
                  --------------     
improvements or additions thereto, having a cost in excess of One Hundred Fifty
Thousand and No/l00 Dollars

                                       86
<PAGE>
 
($l50,000.00) are constructed or reconstructed upon the Premises, Developer
shall serve written notice upon the Landlord in the manner specified in this
Lease of Developer's intention to perform such work for the purpose of enabling
Landlord to post notices on non-responsibility under the provisions of Section
3094 of the Civil Code of the State of California, or any other similar notices
which may be required by law.

           9.3 Discharge of Liens.  If any mechanics liens or other liens shall
               ------------------
be filed by reason of work, labor, services or materials supplied or claimed to
have been supplied to Developer or anyone holding the Premises, or any part
thereof, through or under Developer, Developer shall cause the same to be
discharged of record within sixty (60) days after notice to Developer of the
filing thereof, or otherwise free the Premises from the effect of such claim of
lien and any action brought to foreclose such lien within such sixty (60) day
period, or Developer, within such sixty (60) day period, shall promptly furnish
to Landlord a bond in an amount and issued by a surety company satisfactory to
Landlord securing Developer against payment of such lien and against any and all
loss or damage whatsoever in any way arising from the failure of Developer to
discharge such lien.

           9.4 Landlord's Right to Pay.  In the event Developer fails to perform
               -----------------------
its obligations under subsection 9.3 above with respect to any lien within the
sixty (60) day period specified in subsection 9.3 above, Landlord may, but shall
not be obligated to pay the amount thereof, inclusive of any interest thereon,
and any costs assessed against Developer in said litigation, or may discharge
such lien by contesting its validity or

                                       87
<PAGE>
 
by any other lawful means.

           9.5 Reimbursement of Landlord.  Any amount paid by Landlord for any
               -------------------------
of the expenses described in subsection 9.4 above, and all reasonable legal and
other expense of Landlord, including reasonable counsel fees, and costs of suit,
in defending any such action or in connection with procuring the discharge of
such lien, with all necessary disbursements in connection therewith, together
with interest thereon at the rate provided by law from the date of payment shall
be repaid by Developer to Landlord on demand.


          10.  CONDEMNATION:
               ------------

           10.1  Definition of Terms.  The following definitions shall govern
                 -------------------
interpretation of this subsection.

               10.1.1  Total Taking.  The term "total taking" as used in
                       ------------           
           this Section 10 means the taking of the entire Premises under the
           power of eminent domain or the taking of so much thereof as the
           parties mutually agree will prevent or substantially impair the use
           of the Premises of the uses and purposes than being made or proposed
           to be made by Developer of the Premises. If the parties do not agree
           as to whether prevention or substantial impairment has occurred, that
           issue may be arbitrated as provided in the rules for arbitration
           published by the American Arbitration Association. Each party shall
           pay half of the cost of such arbitration.

                                      88
<PAGE>
 
               10.1.2  Partial Taking.  The term "partial taking" means the
                       --------------
           taking of a portion only of the Premises which does not constitute a
           total taking as defined above.

               10.1.3  Voluntary Conveyance.  Neither party to this Lease
                       --------------------
           will voluntary convey any interest related to this Lease to any
           agency, authority or public utility under threat of a taking under
           the power of eminent domain in lieu of formal proceedings without
           first providing written notice to the other of any request or
           intention to do so.

               10.1.4  Date of Taking.  The term "date of taking" shall be
                       --------------
           the date title to the Premises or portion thereof passes and vests in
           the condemnor or the date of entry of an order for immediate
           possession with any judicial proceeding in eminent domain or the date
           physical possession of the Premises is taken or interfered with,
           whichever first occurs.

               10.1.5  Leased Land.  The term "leased land" means the real
                       -----------
           property demised hereby, but exclusive of any and all improvements
           situated upon the Premises at the commencement of the Lease term and
           also exclusive of all improvements constructed or placed thereon by
           or under Developer and exclusive of any grading and other site work
           performed by or under Developer.

             10.2  Effect of Taking.  If during the term hereof there shall be a
                   ----------------
total or partial taking under the power of eminent domain, then the Leasehold
Estate of Developer in and to

                                       89
<PAGE>
 
the Premises, in the event of a total taking, or the portion thereof taken, in
the event of a partial taking, shall cease and terminate, as of the date of
taking thereof. If this Lease is so terminated in whole or in part, all Ground
Rent and other charges payable by Developer to Landlord hereunder attributable
to the Premises, or portion thereof taken, shall be paid by Developer up to and
prorated through the date of taking by the condemnor. Any portion of the
security deposit provided for in subsection 16.1.1 fairly attributable to the
terminated portion of the Lease-hold Estate shall be repaid to Developer and the
parties shall thereupon be released from all further liability in relation
thereto.

           10.3  Allocation of Award.  All compensation and damages awarded 
                 -------------------
in connection with any taking, total or partial, of the Premises including any
improvements thereon shall be allocated so that Developer shall receive that
portion of the award attributable to the value determined for improvements then
existing on the Premises, the value of Developer's leasehold interest in the
Premises and severance or other damages to buildings or the Leasehold Estate.
The remainder of the award, including all portions of the award attributable to
the value of the land as affected by the leasehold, and any severance or other
damages to the land, shall be payable to Landlord.

           10.4  Reduction of Ground Rent on Partial Taking. In the event of a
                 ------------------------------------------
partial taking, the Ground Rent payable by Developer shall be adjusted from the
date of taking to the next adjustment date (see subsection 3.2.1).  Such Ground
Rent adjustment caused by the partial taking shall be made by reducing the

                                       90
<PAGE>
 
Ground Rent payable by Developer based on the ratio between the fair market
value of the leased land at the date of taking and the fair market value of the
leased land remaining immediately thereafter, valued for the use being made of
the leased land by Developer prior to such taking.

           10.5  Temporary Taking.  If all or any portion of the Premises shall
                 ----------------
be taken by any competent authority for temporary use or occupancy, this Lease,
at the option of Developer, shall continue in full force and effect without
reduction or abatement of rent, notwithstanding any other provision of this
Lease, statute or rule of law to the contrary, and Developer shall, in such
event, be entitled to the entire award for such taking to the extent that the
same shall be applicable to6 the period of such temporary use or occupancy
included in the term of this Lease and Landlord shall be entitled to the
remainder thereof.


          11.  ALTERATIONS BY DEVELOPER:
               ------------------------
          Developer shall have the right at any time and from time to time
during the Lease term to make, at its sole cost and expense, such changes and
alterations, structural or otherwise, in or to the improvements, other than
dedicated public improvements, constructed upon the Premises as Developer shall
deem necessary or desirable, including without limitation, the right to remove
and/or demolish buildings and other improvements provided that other buildings
or improvements are constructed in their place if such demolition occurs when
twenty (20) or more years are remaining in the term of this Lease, including any

                                       91
<PAGE>
 
extensions hereof.  The rights granted by this section shall be limited to and
their exercise shall comply with the terms of Section 7 and subsection 3.3
hereof.



          12.  TAXES AND ASSESSMENTS:
               --------------------- 
               12.1 Payment by Developer. Developer recognizes and understands
                    --------------------
that this Lease may create a possessory interest subject to property taxation
and that Landlord may be subject to the payment of property taxes on such
interest. Developer shall pay prior to delinquency all real estate taxes and
assessments on the Premises and/or Developer's possessory interests therein
levied during the term of this Lease. Developer shall not place or allow to be
placed on the Premises, or any part thereof, any mortgage, trust deed,
encumbrance or lien unauthorized by this Lease. Developer shall remove or have
removed any levy or attachment made on any of the Premises, or any part thereof,
or assure the satisfaction thereof within a reasonable time, but in any event
prior to a sale thereof. Nothing herein contained shall be deemed to prohibit
Developer from contesting the validity or amounts of any tax, assessment,
encumbrance or lien, nor to limit the remedies available to Developer in respect
thereto.

               12.2  Installment Payments.  If any real estate, special tax or
                 --------------------
assessments are at any time during the term of this Lease, levied or assessed
against the Premises or Developer's Leasehold Estate hereunder, which, upon
exercise of any option permitted by the assessing authority, may be paid in
installments or converted to an installment payment basis (irrespective of
whether interest shall accrue on unpaid installments), Developer

                                       92
<PAGE>
 
may elect to pay such taxes or assessments in installments with accrued interest
thereon.  In the event of such election, Developer  shall be liable only for
those installments of such taxes or assessments which become payable during the
term of this Lease, and Developer shall not be required to pay any such
installment which becomes due and payable after the expiration of the term of
this Lease.  Landlord shall execute whatever documents may be necessary to
convert any such taxes or assessments to such an installment payment basis if
requested so to do by Developer and if such action is authorized by law then in
effect.

           12.3  Proration.  Any real estate taxes and assessments which are
                 ---------
payable by Developer hereunder shall be prorated between Landlord and Developer
at the commencement and expiration or earlier termination of the term of this
Lease if such real estate taxes and assessments relate to a fiscal period of the
levying authority which arose before the term commenced or extends beyond the
expiration or earlier termination of the term hereof.

           12.4  Right to Contest.  Developer and any subtenant, with
                 ---------------- 
Developer's consent, shall have the right to contest the amount or validity of
any real estate taxes and assessments, in whole or in part, by appropriate
administrative and legal proceedings, without any cost or expense to Landlord,
and Developer may postpone payment of any such contested real estate taxes and
assessments pending the prosecution of such proceedings and any appeals so long
as such proceedings shall operate to prevent the collection of such real estate
taxes and the sale of the Premises to satisfy any lien arising out of the
nonpayment of the

                                       93
<PAGE>
 
same, provided, however that if at any time payment of the whole or any part
thereof shall become necessary in order to prevent the termination of the right
of redemption of any property affected thereby, or if there is to be an eviction
of Developer because of nonpayment thereof, Developer shall pay the same in
order to prevent such termination of the right of redemption or such eviction.
Landlord shall execute and deliver to Developer whatever documents may be within
Landlord's legal authority necessary or proper to permit Developer or any
subtenants, with Developer's consent, to so contest any real estate taxes or
which may be necessary to obtain payment of any refund which may result from any
such proceedings. Any such contest shall be at no cost or expense to Landlord.
Each refund of any tax or assessment so contested shall be paid to Developer.


          13.  CERTIFICATES BY DEVELOPER AND LANDLORD:
               --------------------------------------

           13.1  Developer to Provide.  Developer agrees upon not less than
                 --------------------
twenty (20) days' notice by Landlord to execute, acknowledge and deliver to
Landlord a statement in writing certifying (i) that this Lease is unmodified and
in full force and effect (or if there have been modifications that the same is
in full force and effect as modified and stating the modifications);(ii) whether
or not to the best knowledge of Developer there are then existing any offsets or
defenses against the enforcement of any of the terms, covenants or conditions
hereof upon the part of Developer to be performed and, if so, specifying the
same; and (iii) the dates to which the Ground Rent and other charges have been
paid, it being intended that any such statement delivered

                                       94
<PAGE>
 
pursuant to this subsection may be relied upon by any prospective purchaser of
the fee of the real property comprising the Premises.

           13.2  Landlord to Provide.  Landlord agrees upon not less than twenty
                 -------------------
(20) days' prior notice by Developer, to execute, acknowledge and deliver to
Developer a statement in writing certifying (i) that this Lease is unmodified
and in full force and effect (or if there have been modifications, that the same
is in full force and effect as modified and stating the modifications); (ii) the
dates to which the Ground Rent and other charges have been paid; (iii) stating
whether or not to the best knowledge of Landlord, Developer is in default in
performance of any covenant, agreement or condition contained in this Lease and,
if so, specifying each such default of which Landlord may have knowledge; and
(iv) whether or not there are to Landlord's best knowledge any offsets or
defenses claimed by and/or available to Developer to the payment or rental, it
being intended that any such statement delivered pursuant to this subsection may
be relied upon by any prospective assignee or subtenant of the whole or any
portion of the Premises, or by any lender extending credit on the security of
Developer's Leasehold Estate.


          14.  QUIET ENJOYMENT:
               --------------- 
          Landlord covenants that Developer, upon the performance of the
covenants and agreements herein contained on Developer's part to be performed,
shall and may at all times, for itself and its subtenants, peaceably and quietly
have, hold and enjoy the Premises during the term of this Lease.

                                       95
<PAGE>
 
          15.  TERMINATION AND FURTHER LEASING:
               ------------------------------- 
           15.1  Termination.  Subject to the provisions of Section 4, this 
                 ----------- 
Lease may be terminated at any time by mutual agreement of the parties.

           15.2  Termination by Developer.  Developer may terminate this Lease
                 ------------------------  
in the event:  (A) Developer is unable to secure an extended coverage leasehold
policy of title insurance, within ninety (90) days following execution of this
Lease containing only those exceptions approved by Developer; (B) during the
first twelve (12) months that this Lease is in effect if costs and expenses
associated with development of the Premises shall increase in an amount which,
in the Developer's good faith judgment, renders such development uneconomic; or
(C) during the first seven (7) years that this Lease is in effect if Developer
is not able to obtain a Lease of Parcel 7 of Parcel Map 16960, pursuant to the
Option to Lease between the City of Long Beach and Developer, dated December 20,
1985.  As a condition precedent to termination, Developer shall have first given
Landlord sixty (60) days notice of its intention to terminate during which time
Landlord shall have an opportunity to cure the deficiency, if possible, within
Landlord's exclusive discretion

           15.3  Termination by Landlord.  Subject to the provision of Section 4
                 -----------------------
of this Lease, Landlord may terminate this Lease under the following
circumstances:

               15.3.1  Developer fails to pay rent or any other charge
           required by this Lease.

               15.3.2  Developer assigns this Lease in violation of
           subsection 5.1.

                                       96
<PAGE>
 
               15.3.3  Failure of Developer to submit drawings or related
           documents required by this Lease.

               15.3.4  Failure of Developer to provide the good faith
           deposit required by this Lease.

               15.3.5  Bankruptcy of Developer.  Final adjudication or
           filing of a voluntary petition for bankruptcy by Developer.

             Provided, however, that in all cases, Landlord shall give Developer
sixty (60) days prior written notice of its intention to terminate, during which
time Developer shall have an opportunity to cure the default.  However, if the
default is of a nature such that it cannot be cured within sixty (60) days,
Developer shall not be in default if Developer shall commence such use and
diligently prosecute it to completion.


          16.  SECURITY DEPOSIT:
               ----------------
           16.1  Good Faith Deposit.
                 ------------------

               16.1.1  Receipt by Landlord.  Developer has, concurrently
                       -------------------  
           with the execution and delivery of this Lease, delivered to Landlord
           a good faith deposit in the amount of One Hundred Thousand and No/100
           Dollars ($100,000.00) as security for the performance of the
           obligations of Developer to be performed in accordance with the
           provisions of this Lease. The receipt of the deposit is hereby
           acknowledged by Landlord.

               16.1.2  Form of Deposit.  The good faith deposit, at the
                       ---------------
           option of Developer, may be in the form of (i) cash; or (ii)
           cashier's or certified check; or

                                       97
<PAGE>
 
           (iii) negotiable certificate or certificates of deposit issued by a
           federal or state bank or savings and loan association; or (iv) an
           irrevocable letter of credit in favor of Landlord issued by an
           established bank or other institution satisfactory to Landlord; or
           (v) a bond in a form and with a surety reasonably satisfactory to
           Landlord providing for payment to Landlord of amounts that may become
           payable to Landlord under this Lease from time to time; or (vi) such
           other form of security or deposit as may be mutually acceptable.
           Developer may change the form of the deposit from time to time, at
           its option, to any other of the permitted forms of deposit. The
           deposit, if in cash or certified or cashier's check shall be
           deposited in an interest bearing account of Landlord in a bank,
           savings and loan association or trust company selected by Developer
           and approved by Landlord, which approval shall not unreasonably be
           withheld. Developer shall have the right to specify the type of
           account in which such funds are, from time to time, to be deposited.
           Provided that no default has occurred during the term of the Lease
           which has resulted in a forfeiture by Developer of all or a part of
           the good faith or security deposit, such deposit, or any portion
           thereof which has not been forfeited, shall be returned to Developer
           upon expiration of this Lease.

               16.1.3  Interest.  Landlord shall be under no obligation to pay
                       --------
           or earn interest on the deposit, but

                                      98
<PAGE>
 
           if interest shall accrue or be payable thereon such interest, when
           received by Landlord, shall be promptly paid to Developer. Landlord
           agrees, but not more often than quarterly, upon receipt of a request
           from Developer, to cause any such interest so accrued on such deposit
           to be paid to Developer by the bank, savings and loan association or
           trust company with which said sums have been deposited.

               16.1.4  If Bond is Posted.  If a bond is posted to satisfy
                       -----------------
           the requirements of this Lease with a fixed term and if such bond
           expires prior to the date Developer is entitled to have the security
           deposit returned, Developer shall provide Landlord with either (i)
           evidence of the renewal of such bond for an additional period, or
           (ii) a new security deposit satisfying the requirements of subsection
           16.1 in one of the forms authorized by such subsection, including,
           without limitation, a new bond, not less than twenty (20) days prior
           to the expiration of the bond posted to satisfy the requirements in
           subsection 16.1 above.


          17.  GENERAL PROVISIONS:
               ------------------
   
           17.1  Notices, Demands and Communications between the Parties.
                 -------------------------------------------------------
Written notices, demands, and communications between Landlord and Developer
shall be in writing and shall be sufficiently given if personally served or if
mailed by registered or certified mail, postage prepaid, return receipt
requested, to the principal offices of Landlord or Developer, set forth in

                                       99
<PAGE>
 
subsection 1.5 of this Lease.  Any such notice, demand or communication so given
by mailing to Landlord shall be mailed to the attention of the General Manager
of Landlord.  Copies of any such notice, demand or communication to be given to
Developer pursuant to this Lease shall be given to Kilroy Long Beach Associates,
Attention, President, such other entity, person or persons as he may designate,
by personal service or by mailing the same, as required by this subsection, to
such party, at the address set forth in subsection 1.5 above or such other
address as may be designated.  Either Landlord or Developer may from time to
time by written notice to the other designate a different address or addresses
or party or parties to whom copies of notices, demands and communications are to
be delivered or to whose attention notices, demands and communications are to be
addressed which shall be substituted for the addresses and/or names above
specified.  Notices shall be deemed served effective immediately if personally
served and effective as of the date received and set forth on the return receipt
if served by registered or certified mail.

           17.2  Conflict of Interest.  No member, official or employee of
                --------------------
Landlord shall have any personal interest, direct or indirect, in this Lease,
nor shall any such member, official or employee participate in any decision
relating to this Lease which affects his personal interest or the interest of
any corporation, partnership or association in which he is, directly or
indirectly, interested.  No member, official or employee of Landlord shall be
personally liable to Developer, or any successor in interest, in the event of
any default or breach by Landlord

                                      100
<PAGE>
 
or for any amount which may become due to Developer or successor or on any
obligations under the terms of this Lease.

           17.3  Enforced Delay:  Extension of Time of Performance.  In addition
                 --------------   --------------------------------
to other provisions of this Lease, performance by either party hereunder, shall
not be deemed to be in default where delays or defaults are unavoidable or
performance is rendered impracticable, due to war; enemy action; insurrection;
civil disturbance; strikes; lock-outs; riots; floods; earthquakes; fires;
casualties; acts of God; acts of the public enemy; epidemics; quarantine
restrictions; freight embargoes; lack of transportation; governmental
restrictions or moratoria; failure or inability to secure materials or labor by
reason of regulations or order of any governmental entity; litigation including
eminent domain proceedings or related legal proceedings; acts or failure to act
of the other party; acts or failure to act of any public or governmental agency
or entity; and the time for such performance shall be extended for a period
equal in length to such delay(s).

           17.4  Inspection of Books and Records.  Landlord has the right at all
                 -------------------------------
reasonable times during regular business hours to inspect the books and records
of the Developer pertaining to the Premises as pertinent to the purposes of this
Lease. Developer also has the right at all reasonable times during regular
business hours to inspect the books and records of the Landlord pertaining to
the Premises as pertinent to the purpose of this Lease.


                                      101
<PAGE>
 
           17.5  Defaults and Remedies.
                 ---------------------

               17.5.1  Defaults - General.  Subject to the extensions of
                       ------------------  
           time set forth in subsection 17.3 above, failure by either party to
           perform any term or provision of this Lease constitutes a default
           under this Lease, if not cured within thirty (30) days from the date
           of receipt of a written notice from the other party specifying the
           claimed default provided that if such default cannot reasonably be
           cured within such thirty (30) day period, the party receiving such
           notice of default shall not be in default under this Lease if such
           party commences the cure of such default within such thirty (30) day
           period and thereafter diligently prosecutes the steps to cure such
           default to completion.

               17.5.2  Institution of Legal Actions.  In addition to any
                       ----------------------------
           other rights or remedies, either party may institute legal action to
           cure, correct, or remedy any default, to recover damages for any
           default, or to obtain any other remedy consistent with the purpose of
           this Lease. Such legal actions must be instituted in the South Branch
           of the Superior Court of the County of Los Angeles, State of
           California, in an appropriate municipal court in that county, or in
           the Federal District Court in the Central District of California. The
           prevailing party in any action commenced pursuant to this Lease shall
           be entitled to recover reasonable costs, expenses and attorneys'
           fees.

                                      102
<PAGE>
 
               17.5.3  Applicable Law.  The laws of the State of California 
                       --------------
           shall govern the interpretation and enforcement of this Lease.

               17.5.4  Service of Process.  In the event any legal action is 
                       ------------------
           commenced by Developer against Landlord, service of process on
           Landlord shall be made by personal service upon the General Manager
           of the Landlord, or in such other manner as may be provided by law.

                   In the event that any legal action is commenced by Landlord
           against Developer, service of process on Developer shall be made as
           provided by law and shall be valid whether made within or without the
           State of California, or in such manner as may be provided by law.

               17.5.5  Rights and Remedies Are Cumulative. Except as otherwise
                       ----------------------------------
           expressly stated in this Lease, the rights and remedies of the
           parties are cumulative, and the exercise by either party of one or
           more of such rights or remedies shall not preclude the exercise by
           it, at the same or different times, of any other rights or remedies
           for the same default or any other default by the other party.

               17.5.6  Inaction Not a Waiver of Default.  Any failures or 
                       --------------------------------
           delays by either party in asserting any of its rights and remedies as
           to any default shall not operate as a waiver of any default or of any
           such rights or remedies or deprive either such party of its

                                      103
<PAGE>
 
           right to institute and maintain any actions or proceedings which it
           may deem necessary to protect, assert or enforce any such rights or
           remedies.

               17.5.7  Remedies.  In the event of a default by Developer, which
                       -------- 
           is not cured by Developer within the times specified in this Lease,
           Landlord, without further notice to Developer, may declare this Lease
           and/or Developer's right of possession at an end and may reenter the
           Premises by process of law, in which event, Landlord shall have the
           right to recover from Developer:

                 17.5.7.1  The worth at the time of award of the unpaid Ground 
           Rent which has been earned at the time of termination, plus interest;

                 17.5.7.2  The worth at the time of award of the amount by 
           which the unpaid Ground Rent which would have been earned after
           termination until the time of award exceeds the amount of such rental
           loss that Developer proves could have been reasonably avoided, plus
           interest;

                 17.5.7.3  The worth at the time of award of the amount by 
           which the unpaid Ground Rent for the balance of the term after the
           time of award exceeds the amount of such rental loss for the same
           period that Developer proves could be reasonably avoided, plus
           interest thereon; and

                                      104
<PAGE>
 
                 17.5.7.4  The remedies of Landlord as hereinabove provided 
           are subject to the other provisions of this Lease, including 
           Section 4 hereof.

               17.5.8  Developer's Rights.  Developer shall have the right to
                       ------------------
           challenge the correctness of any determination of default made by
           Landlord, and Landlord shall carefully review and consider
           Developer's challenge.

               17.5.9  Lease Termination.  Should governmental action or 
                       -----------------  
           failure to act preventing construction in accordance with this Lease
           or rendering it impossible, occur prior to the time that Developer
           has constructed any building upon the Premises, then Developer shall
           have the right, at its option, with the prior written approval of any
           lender which has a security interest in the Leasehold Estate, to
           cancel and terminate this Lease by giving written notice of such
           termination to Landlord, at any time prior to the construction of a
           building upon the Premises. Upon any such termination of this Lease,
           Developer and Landlord shall execute and record a quitclaim deed
           sufficient to remove the cloud of this Lease and the short form of
           this Lease from record title to the Premises and the deposits
           described in subsections 16.1 and 16.2, plus any interest accrued on
           such deposits, shall be paid to Developer by Landlord.

               17.5.10  Landlord's Exercise of Remedies.  In the event of an 
                        -------------------------------
           uncured default by Developer in the performance of any of its
           obligations to commence and

                                      105
<PAGE>
 
           complete the construction of the initial building within the times
           required by Section 7 of this Lease and in the further event that
           Landlord elects to exercise its remedy to terminate this Lease by
           reason of such default by Developer, Developer may, for a period of
           thirty (30) days following its receipt of written notice from
           Landlord of Landlord's election to terminate this Lease by reason of
           such default, elect to prevent such termination from becoming
           effective by releasing and paying to Landlord a portion of the good
           faith deposit held by Landlord under subsection 16.1, which portion
           shall be equal to the lesser of (i) the amount of such deposit so
           held by Landlord; or (ii) an amount equal to the product of One and
           One-half Dollar ($1.50) per square foot times the number of square
           feet of building area the failure to commence or complete the
           construction of which has caused the subject default or the adjusted
           rent per square foot if this provision becomes operative after any
           rental adjustment.

               17.5.11  Payment to Developer.  In the event that this Lease is
                        --------------------
           terminated as a result of an uncured default by Landlord and in the
           further event that Developer has constructed streets, utilities
           and/or other off-site improvements or grading improvements upon or in
           relation to the Project prior to such termination of this Lease,
           Landlord shall, pursuant to its responsibilities under State law, use
           its best efforts to resell or relet the Premises, or any portion
           thereof,

                                      106
<PAGE>
 
           as soon and in such manner as Landlord shall find feasible and
           consistent with the objectives of such law to a qualified and
           responsible party or parties (as reasonably determined by Landlord)
           who will assume the obligation of making or completing the
           improvements required of Developer under this Lease, or such other
           improvements in their stead as shall be satisfactory to Landlord and
           in accordance with the uses specified for the Premises in this Lease.
           Upon such resale or reletting of the Premises, or any portion
           thereof, the proceeds thereof shall be applied:

                 17.5.11.1  Reimbursement to Landlord. First, to reimburse 
                            -------------------------
           Landlord for all costs and expenses incurred, including, but not
           limited to, salaries to personnel in connection with the recapture,
           management, and resale or reletting of the Premises, or part thereof
           (but less any income derived by Landlord from the Premises, or part
           thereof, in connection with such management); all taxes, assessments
           and water and sewer charges paid with respect to the Premises, or
           part thereof; any payments made or which are necessary to be made to
           discharge any encumbrances or liens existing on the Premises, or part
           thereof, at the time or revesting of title thereto in Landlord or to
           discharge or prevent from attaching any subsequent encumbrances or
           liens due to obligations, defaults or acts of Developer, its
           successors or transferees;

                                      107
<PAGE>
 
           any expenditures made or obligations incurred with respect to the
           making or completion of the improvements or any part thereof on the
           Premises, or part thereof; and any amounts otherwise owing Landlord
           by Developer and its successor or transferee;

                 17.5.11.2  Reimbursement to Developer. Second, to reimburse 
                            --------------------------
           Developer, its successors or transferees, a sum up to the amount
           equal to the sum of (i) the costs incurred for the development of the
           Project, prorated to the Premises, if the Premises are less than all
           of the Project, on a square foot basis, and for the improvements
           existing on the Premises at the time of the re-entry and repossession
           by Developer, less (ii) any gains or income withdrawn or made by
           Developer from the Premises or the improvements thereon; provided
           however, that no payment shall be made to Developer if this Lease is
           terminated as a result of an uncured default by Developer.

                 17.5.11.3  Ground Rent.  Third, in the case of a reletting, 
                            -----------
           to pay to Landlord an amount equal to the Ground Rent and other
           payments payable to Landlord hereunder that Landlord would have
           received if this Lease had not been terminated;

                 17.5.11.4  Remaining Balance.  Any balance remaining after such
                            -----------------
           reimbursement shall be retained by Landlord as its property. In the
           event that such street, utility and/or other off-site improve-

                                      108
<PAGE>
 
           ments have been constructed by or the costs of such construction were
           paid or reimbursed by an improvement or special assessments district,
           the provisions of this subsection shall be applicable to the costs
           for such improvements if payment of the bonds issued by such district
           have been guaranteed by Developer or are secured by security, in
           addition to the Leasehold Estate created hereby, or paid by
           Developer, but only to the extent of such payment by Developer or of
           payment from the proceeds of such guarantee or security.

                 17.5.12  Delivery of Plans.  In the event that this Lease is
                          -----------------
           terminated, for any reason whatsoever, Developer shall deliver to
           Landlord one set of all plans and data in its possession concerning
           the Premises.

           17.6  Right to Contest Laws.  Developer shall have the right, 
                 --------------------- 
after notice to Landlord to contest or to permit its subtenants to contest by
appropriate legal proceedings, without costs or expense to Landlord, the
validity of any law, ordinance, order, rule, regulation or requirement to be
complied with by Developer under this Lease and to postpone compliance with the
same except such laws as may be adopted by Landlord, provided such contest shall
be promptly and diligently prosecuted at no expense to Landlord and so long as
Landlord shall not thereby suffer any civil penalties, sanction or be subjected
to any criminal penalties or sanctions, and Developer shall protect and save
harmless Landlord against any liability and claims for any such noncompliance or
postponement of compliance.

                                      109
<PAGE>
 
           17.7  Trade Fixtures.  All trade fixtures, furnishings, 
                 --------------                 
equipment and signs installed by or under Developer or subtenants shall be and
remain the property of the person, firm or corporation installing the same and
shall be removable at any time during the term of this Lease. The removal of any
such trade fixtures, furnishings, equipment and signs shall be at the expense of
the person, firm or corporation removing the same, who shall repair any damage
or injury to the Premises and all improvements thereto occasioned by the
removal thereof. In the event that any subtenant acquires any furniture, trade
fixtures, signs and/or equipment to be used in connection with its subleased
premises from an equipment lessor or from an equipment seller under a security
agreement, Landlord agrees to execute such documents as may reasonably be
required by the equipment lessor or creditor in order to assure such party of
its prior rights in and to any such equipment, furniture, signs and/or trade
fixtures and of its right to remove any such equipment, furniture, signs and/or
trade fixtures from the subleased premises for a period of not to exceed forty-
five (45) days from and after notice to such party of the termination or
expiration of the sublease of the subject subtenant-lessee or subtenant-debtor.

           17.8  Continued Possession of Developer.  If Developer shall 
                 ---------------------------------  
hold over the Premises after the expiration of the term hereof with the consent
of Landlord, either express or implied, such holding over shall be construed to
be only a tenancy from month-to-month, subject to all the covenants, Ground Rent
conditions and obligations hereof and terminable by either party as provided by
law.

                                      110
<PAGE>
 
           17.9  Utilities.  Developer shall pay or cause to be paid all charges
                 ---------
for gas, electricity, water and other utilities furnished to the Premises during
the term of this Lease and all sewer use charges or similar charges or
assessments for utilities levied against the Premises for any period included
within the term of this Lease.

           17.10  Surrender.  Upon the expiration of the term of this Lease, as
                  --------- 
provided herein, or sooner termination of this Lease, Developer, subject to
subsection 17.5.11 shall surrender to Landlord, all and singular, the Premises,
including any buildings and all improvements constructed by or under Developer
then situated upon the Premises, and Developer shall execute, acknowledge and
deliver to Landlord within ten (10) days after written request from Landlord to
Developer, a Quitclaim Deed or other document required by any reputable title
company to remove the cloud of this Lease from the Premises.  Notwithstanding
the foregoing provisions of this section to the contrary, Developer shall have
the right, at any time not less than six (6) months prior to the expiration of
the term of this Lease and for a period of sixty (60) days following the
expiration of the term to remove all or any portion of the buildings and other
improvements constructed by or under Developer upon the Premises, without
obligation to replace the same with new buildings and/or other improvements as
required by subsection 6.3 above.

           17.11  Partial Invalidity.  If any term or provision of this Lease or
                  ------------------  
the application thereof to any party or circumstances shall, to any extent, be
held invalid or unenforceable, the remainder of this Lease, or the application
of such

                                      111
<PAGE>
 
term or provision, to persons or circumstances other than those as to whom or
which it is held invalid or unenforceable, shall not be affected thereby, and
each term and provision of this Lease shall be valid and enforceable to the
fullest extent permitted by law.

           17.12  Section Headings.  The section and subsection headings of this
                  ----------------
Lease are inserted as a matter of convenience and reference only and in no way
define, limit or describe the scope or intent of this Lease or in any way affect
the terms and provisions hereof.

           17.13  Short Form Lease.  Concurrently with the execution and 
                  ----------------
delivery of this Lease, Landlord and Developer have executed, acknowledged and
caused to be recorded a short form of this Lease in the form attached hereto as
Exhibit "F".

           17.14  Exhibits Incorporated.  Exhibit "A" is hereby incorporated 
                  ---------------------
in this Lease.  No other exhibit is incorporated in the Lease and all exhibits,
other than Exhibit "A", may be changed or modified by agreement between Landlord
and Developer at any time and from time to time without amending this Lease.

           17.15  Entire Agreement, Waivers and Amendments. This Lease is
                  ----------------------------------------
executed in three (3) triplicate originals, each of which is deemed to be an
original.  It constitutes the entire understanding and agreement of the parties.
This Lease integrates all the terms and conditions mentioned herein or
incidental hereto, and supersedes all negotiations or previous agreements
between the parties with respect to all or any part of the subject matter
hereof.

                                      112
<PAGE>
 
           17.16  Waivers.  All waivers of the provisions of this Lease must 
                  -------
be in writing by the appropriate authorities of Landlord or Developer, and all
amendments hereto must be in writing by the appropriate authorities of Landlord
and Developer.

           17.17  Approvals.  Except where specific criteria are set forth as
                  ---------   
a condition to approving or disapproving or agreeing upon a matter of course of
action, including but not limited to assignment (subsection 5.4), and subletting
(subsection 5.7.2), in all circumstances where under this Lease either party is
required to approve or disapprove any matter, such approval shall not be
unreasonably withheld, and on matters requiring agreement between Landlord and
Developer, they shall act in good faith.

           17.18  Successors in Interest.  The provisions of this Lease shall
                  ----------------------   
be binding upon and shall inure to the benefit of the heirs, executors, assigns
and successors in interest of the parties hereto.

           17.19  "And/Or".  Whenever the words and symbols "and/or" are used 
                  --------
in this Lease, it is intended that this Lease be interpreted and the sentence,
phrase or other part be considered in both its conjunctive and disjunctive
sense, and as having been written twice, once with the word "and" inserted, and
once with the word "or" inserted, in the place of said words and symbol
"and/or".

           17.20  "Including" Defined.  The use of the word "including" or 
                  ------------------- 
"include", when followed by any general statement, term or matter, will not be
construed to limit such statement, term or matter to the specific items or
matters set forth im-

                                      113
<PAGE>
 
mediately following such work or to similar items, terms or matters, but rather
will be deemed to refer to all other items, terms or matters that could
reasonably fall within the broadest possible scope of such general statement,
term, item or matter.

           17.21  Right of First Refusal to Purchase.  If Landlord shall
                  ---------------------------------- 
determine during the term of this Lease that it is lawful and in the public
interest to sell the Premises, or any portion thereof, Landlord shall, prior to
making the Premises or part thereof available for sale to any other party,
provide Developer with the opportunity to purchase said property at its fair
market value, as determined by an appraisal obtained by Landlord.  If Developer
has not entered into an agreement to purchase said property within sixty (60)
days of the date it is first offered for sale to Developer at the price
theretofore determined by Landlord to be the fair market value, Landlord may
offer the property for sale on the open market.  Provided, however, that if
Landlord should reduce the fair market value of the Premises or part thereof to
be sold by seven and one-half percent (7.5%) or more, Developer's first refusal
rights shall be reinstated.  Developer shall respond to any such re-offer within
five (5) business days, and if Developer fails to respond within that time
period Developer's first refusal rights shall terminate. The determination
whether such property shall be made available for sale is and shall be within
the sole and exclusive discretion of Landlord.  Landlord shall determine the
legality of such action prior to making a determination to sell on the basis of
the law then in effect.

                                      114
<PAGE>
 
                             
           17.22  If Developer is a Trustee.  If Developer is a Trustee, this
                  -------------------------
Lease is executed by the undersigned Trustee, not personally, but solely as
Trustee, and it is expressly understood and agreed by the parties hereto,
anything contained herein to the contrary notwithstanding, that each and all of
the covenants, undertakings, representations and agreements herein made are
intended, not as personal covenants, undertakings, representations and
agreements of the Trustee, individually, or for the purpose of binding the
Trustee personally, but this Lease is executed and delivered by the Trustee
solely in the exercise of the powers conferred upon the Trustee as such Trustee
under the trust agreement and no personal liability or personal responsibility
is assumed by, nor shall at any time be asserted or enforced against said
Trustee on account hereof, or on account of any covenant, undertaking,
representation, warranty or agreement herein contained, either expressed or
implied, and all such personal liability, if any, being hereby expressly waived
and released by the parties hereto, and by all persons claiming by or under said
parties.  The provisions of this subsection 17.22 shall apply to any Trustee
succeeding in whole or in part to the interests of Developer hereunder .

           17.23  Limitation of Liability of Partners.  From and after the
                  -----------------------------------
completion of the construction of the improvements described in this Lease, if
Developer at any such time shall be a partnership or joint venture, Landlord
shall look solely to the assets of such partnership or joint venture for the
collection or satisfaction of any money judgment which Landlord may recover
against Developer, and Landlord shall not look for the collection

                                      115
<PAGE>
 

 
or satisfaction of any such judgment to the personal assets of any person who
shall at any time be a partner, joint venturer or participant in or under any
such partnership or joint venture. The provisions of the subsection shall be
binding upon Landlord and each and every future owner of Landlord's interest
under this Lease and shall insure to the benefit of each and every such partner,
joint venturer and participant.

           17.24  Approvals.  Except as otherwise specifically provided in this
                  ---------
Lease, all approvals to be done by Landlord may be done by Landlord's General
Manager or his designee.



          IN WITNESS WHEREOF, Landlord and Developer have signed this Lease as
of the date opposite their signature

                              BOARD OF WATER COMMISSIONERS OF THE CITY OF LONG
                              BEACH
                  4/21, 1988  By:      [signature]
                                 ---------------------------
                  4/21, 1988  By:      [signature]
                                 ---------------------------

                              LANDLORD

                              KILROY LONG BEACH ASSOCIATES, a
                              California limited partnership

                              By:  KILROY INDUSTRIES, a
                                   California corporation 
                                   General Partner
                  4/11, 1988
                                   /s/John B. Kilroy, Jr.
                                   ----------------------
                                     JOHN B. KILROY, JR.
                                            President
                               DEVELOPER


                                      116
<PAGE>
 
 
         This Lease Agreement is approved as to form this 21ST day of APRIL,
1988.

                              JOHN R. CALHOUN, City Attorney


                                      By:/s/Michael Allisso
                                                     Deputy

RPF/md
3/18/88
D-187A&B
                                      117
<PAGE>
 
                           DEVELOPER'S ACKNOWLEDGMENT
                           --------------------------


STATE OF CALIFORNIA  )
                     )  ss.
COUNTY OF LOS ANGELES)


         On  April 11, 1988, before me, the undersigned, a Notary Public in and
             -------------
for said State, personally appeared John B. Kilroy, Jr. ,personally known to me
                                    -------------------  
or proved to me on the basis of satisfactory evidence to be the person that
executed this instrument as President of Kilroy Industries, the corporation that
                            ---------
executed this instrument as the general partner of Kilroy Long Beach Associates,
a California Limited Partnership, the partnership that executed the within
instrument, and acknowledged to me that such corporation executed the same as
such partner and that said partnership executed the same.

         WITNESS my hand and official seal.

[SEAL]   ______________________ [SEAL APPEARS HERE] SEAL

                                                Nadine K Kirk 
                                                -------------
                                                Notary Public in and for
                                                said County and State

DA-KLBA1

<PAGE>
 
                                    PARCEL A


THAT PORTION OF LOT 5 OF TRACT NO. 10548 IN THE CITY OF LONG BEACH, COUNTY OF
LOS ANGELES, STATE OF CALIFORNIA, AS PER MAP RECORDED IN BOOK 174 PAGE 15, ET.
SEQ., OF MAPS IN THE OFFICE OF THE COUNTY RECORDER OF SAID COUNTY ALONG WITH
THAT PORTION OF RANCHO LOS CERRITOS IN SAID CITY, AS PER MAP RECORDED IN BOOK 2,
PAGES 202 THROUGH 205 OF PATENTS IN THE OFFICE OF THE COUNTY RECORDER OF SAID
COUNTY DESCRIBED AS A WHOLE AS FOLLOWS:

BEGINNING AT THE EASTERLY TERMINUS OF THAT CERTAIN COURSE DESCRIBED AS HAVING A
BEARING AND LENGTH OF NORTH 89(degrees) 55' 23" WEST 88.37 FEET" IN THE
NORTHERLY BOUNDARY OF THE LAND DESCRIBED IN THE DEED TO THE STATE OF CALIFORNIA,
RECORDED MAY 11, 1959 AS INSTRUMENT NO. 1870 IN BOOK D-462 PAGE 506, OFFICIAL
RECORDS; THENCE ALONG SAID NORTHERLY LINE THE FOLLOWING COURSES: SOUTH
78(degrees) 19' 22" EAST 502.94 FEET TO A ONE INCH IRON PIPE WITH CALTRANS TAG
AND SOUTH 78(degrees) 55' 01" EAST 83.09 FEET TO A ONE INCH IRON PIPE WITH
CALTRANS TAG; THENCE CONTINUING ALONG SAID NORTHERLY LINE AS MONUMENTED BY ONE
INCH IRON PIPES WITH CALTRANS TAGS SOUTH 80(degrees) 14' 32" EAST 523.56
FEET; THENCE LEAVING SAID NORTHERLY LINE NORTH 9(degrees) 45' 28" EAST 570.00
FEET; THENCE NORTH 25 (degrees) 19' 32" WEST 190.76 FEET; THENCE NORTH
89(degrees) 59' 37" WEST 112.16 FEET; THENCE SOUTH 38(degrees)) 20' 44" WEST
49.52 FEET TO THE TRUE POINT OF BEGINNING; THENCE SOUTH 38(degrees) 20' 44" WEST
              --------------------------- 
146.94 FEET; THENCE SOUTH 31(degrees) 10' 37" WEST 483.95 FEET TO THE BEGINNING
OF A NON-TANGENT CURVE CONCAVE TO THE NORTH HAVING A RADIUS OF 4954.00 FEET AND
TO WHICH BEGINNING A RADIAL LINE BEARS SOUTH l0(degrees) 03' 32" WEST; THENCE
WESTERLY 139.93 FEET ALONG SAID CURVE THROUGH A CENTRAL ANGLE OF 1(degree) 37'
06"; THENCE NORTH 78(degrees) 19' 22" WEST 181.01 FEET; THENCE NORTH 9(degrees)
45' 28" EAST 232.12 FEET; THENCE SOUTH 89(degrees) 53' 11" EAST 233.60 FEET;
THENCE NORTH 53(degrees) 04' 54" EAST 181.74 FEET; THENCE NORTH 0(degree) 16'
54" EAST 129.16 FEET TO THE INTERSECTION WITH A LINE BEARING NORTH 89(degrees)
55' 11" WEST FROM THE TRUE POINT OF BEGINNING; THENCE SOUTH 89(degrees) 55' 11"
EAST 237.51 FEET TO THE TRUE POINT OF BEGINNING. 

CONTAINING 146,831 SQUARE FEET.

                                                             [SEAL APPEARS HERE]


                                 EXHIBIT "A" 
                               Page 1 of 2 Pages
<PAGE>
 
                                    PARCEL B

THAT PORTION OF LOT 5 OF TRACT NO. 10548 IN THE CITY OF LONG BEACH, COUNTY OF
LOS ANGELES, STATE OF CALIFORNIA, AS PER MAP RECORDED IN BOOK 174 PAGE 15, ET.
SEQ., OF MAPS IN THE OFFICE OF THE COUNTY RECORDER OF SAID COUNTY ALONG WITH
THAT PORTION OF RANCHO LOS CERRITOS IN SAID CITY, AS PER MAP RECORDED IN BOOK 2,
PAGES 202 THROUGH 205 OF PATENTS IN THE OFFICE OF THE COUNTY RECORDER OF SAID
COUNTY DESCRIBED AS A WHOLE AS FOLLOWS:

BEGINNING AT THE EASTERLY TERMINUS OF THAT CERTAIN COURSE DESCRIBED AS HAVING A
BEARING AND LENGTH OF NORTH 89(degrees) 55' 23" WEST 88.37 FEET IN THE NORTHERLY
BOUNDARY OF THE LAND DESCRIBED IN THE DEED TO THE STATE OF CALIFORNIA, RECORDED
MAY 11, 1959 AS INSTRUMENT NO. 1870 IN BOOK D-462 PAGE 506, OFFICIAL RECORDS;
THENCE ALONG SAID NORTHERLY LINE THE FOLLOWING COURSES: SOUTH 78(degrees) 19'
22" EAST 502.94 FEET TO A ONE INCH IRON PIPE WITH CALTRANS TAG AND SOUTH
78(degrees)) 55' 01" EAST 83.09 FEET TO A ONE INCH IRON PIPE WITH CALTRANS TAG;
THENCE CONTINUING ALONG SAID NORTHERLY LINE AS MONUMENTED BY ONE INCH IRON PIPES
WITH CALTRANS TAGS SOUTH 80(degrees)) 14' 32" EAST 523.56 FEET; THENCE LEAVING
SAID NORTHERLY LINE NORTH 9(degrees)) 45' 28" EAST 570.00 FEET; THENCE NORTH 25
(degrees)) 19' 32" WEST 190.76 FEET; THENCE NORTH 89(degrees) 59' 37" WEST
112.16 FEET; THENCE SOUTH 38(degrees) 20' 44" WEST 49.52 FEET TO THE TRUE POINT
OF BEGINNING; THENCE NORTH 38(degrees) 20' 44" EAST 120.17 FEET TO THE
INTERSECTION WITH THE SOUTHERLY PROLONGATION OF THE WESTERLY LINE OF PARCEL 4 AS
SHOWN ON A RECORD OF SURVEY IN SAID CITY AS PER MAP FILED IN BOOK 85 PAGE 19 OF
RECORD OF SURVEYS, IN THE OFFICE OF THE COUNTY RECORDER OF SAID COUNTY; THENCE
ALONG THE WESTERLY LINE OF SAID PARCEL AND ITS SOUTHERLY PROLONGATION NORTH
0(degree) 01' 44" EAST 368.59 FEET TO A POINT ON SAID WESTERLY LINE DISTANT
THEREON SOUTHERLY 26.48 FEET FROM THE NORTHWEST CORNER OF PARCEL 4 OF SAID
RECORD OF SURVEY, SAID POINT BEING THE BEGINNING OF A CURVE CONCAVE TO THE
SOUTHWEST HAVING A RADIUS OF 23.00 FEET; THENCE NORTHWESTERLY 33.21 FEET ALONG
SAID CURVE THROUGH A CENTRAL ANGLE OF 82(degrees) 43' 53" TO THE BEGINNING OF A
REVERSE CURVE CONCAVE TO THE NORTH HAVING A RADIUS OF 1056.00 FEET, SAID CURVE
BEING CONCENTRIC WITH AND DISTANT SOUTHERLY 6.00 FEET FROM THE SOUTHERLY CURVED
SIDE LINE OF SPRING STREET 100.00 FEET WIDE AS SHOWN ON SAID RECORD OF SURVEY;
THENCE WESTERLY 89.13 FEET ALONG SAID CURVE THROUGH A CENTRAL ANGLE OF
4(degrees) 50' 10" TO A POINT NORMAL TO THE WESTERLY END OF SAID SOUTHERLY
CURVED PORTION OF THE SIDE LINE OF SAID SPRING STREET; THENCE CONTINUING ON A
LINE PARALLEL TO AND DISTANT SOUTHERLY 6.00 FEET AT RIGHT ANGLES FROM SAID
SOUTHERLY SIDE LINE NORTH 77(degrees) 51' 59" WEST 74.19 FEET TO THE BEGINNING
OF A CURVE CONCAVE TO THE NORTHEAST HAVING A RADIUS OF 212.00 FEET; THENCE
LEAVING SAID PARALLEL LINE NORTHWESTERLY 44.57 FEET ALONG SAID CURVE THROUGH A
CENTRAL ANGLE OF 12(degrees)) 02' 47"; THENCE ON A NON-TANGENT LINE NORTH
66(degrees)) 53' 00" WEST 6.99 FEET TO A POINT ON THE SOUTHERLY SIDE LINE OF
SAID SPRING STREET, 100.00 FEET WIDE; THENCE ALONG SAID SIDE LINE NORTH
77(degrees)) 51' 59" WEST 78.06 FEET TO THE BEGINNING OF A CURVE IN SAID
SOUTHERLY LINE CONCAVE TO THE SOUTH HAVING A RADIUS OF 950.00 FEET; THENCE
WESTERLY 95.65 FEET ALONG SAID CURVE THROUGH A CENTRAL ANGLE OF 5(degrees) 46'
06"; THENCE LEAVING SAID SIDE LINE SOUTH 0(degrees) 08' 48" WEST 426.86 FEET;
THENCE NORTH 89(degrees) 58' 42" EAST 58.51 FEET; THENCE SOUTH 0(degrees) 16'
54" WEST 176.34 FEET TO THE INTERSECTION WITH A LINE BEARING NORTH 89(degrees)
55' 11" WEST FROM THE TRUE POINT OF BEGINNING; THENCE SOUTH 89(degrees) 55' 11"
EAST 237.51 FEET TO THE TRUE POINT OF BEGINNING .

CONTAINING 207,752 SQUARE FEET.

                                                             [SEAL APPEARS HERE]


                                 EXHIBIT "A" 
                               Page 2 of 2 Pages
<PAGE>
 
                              [MAP APPEARS HERE]



 
                                 EXHIBIT "B" 
                               Page 1 of 1 Page
<PAGE>
 
                          AGREEMENT OF NON-DISTURBANCE
                          ----------------------------


    THIS AGREEMENT is made as of the        day of
                                     ------       --------------,
198__, by and among the BOARD OF WATER COMMISSIONERS OF THE CITY
OF LONG BEACH, acting for and on behalf of the City of Long
Beach, a Municipal Corporation (hereinafter called "Landlord");
KILROY LONG BEACH ASSOCIATES, a California Limited Partnership,
(hereinafter called "Developer"); and 
                                      -------------------------
- -------------------- (hereinafter called "Subtenant").



                          PRELIMINARY
                          -----------

    A.  Landlord and Developer have entered into a Lease Agreement dated
                                                                        -----
(hereinafter referred to as the "Ground Lease")  pursuant to which Landlord has
demised and leased to Developer certain real property located in the City of
Long Beach, County of Los Angeles, State of California, including the real
property described in Exhibit "A" attached hereto and incorporated herein.  A
short form of the Ground Lease was recorded            , 198   in the Official
                                           ------------     --
Records of said County.

    B.  Developer, as Sublandlord, and Subtenant, as subtenant, have entered 
into a Sublease dated             , 198  , (hereinafter referred to as the
                     -------------     --   
"Sublease") which Sublease demises to Subtenant a portion of the premises
demised by the

                                  EXHIBIT "C"
                               Page 1 of 7 Pages



<PAGE>
 
Ground Lease (and grants to Subtenant certain rights with respect to other
portions of the premises demised by the Ground Lease). A short form of the
Sublease is being recorded concurrently herewith in the Official Records of said
County, which short form of Sublease describes the premises demised thereby (and
the other rights and obligations of Subtenant with respect to the real property
described in the attached Exhibit "A").

    C.  The parties hereto now desire to enter into this Agreement so as to
clarify their rights, duties and obligations under the Ground Lease and the
Sublease and to further provide for various contingencies as hereinafter set
forth.

    NOW THEREFORE, in consideration of the foregoing and of the mutual agreement
of the parties hereto to the terms and conditions hereinafter contained, the
parties hereto agree as follows:

    1.  In the event Developer shall default in the payment of any sum or in the
performance of any covenant or condition of the Ground Lease, all as provided
therein, or in the event of any termination or expiration of the Ground Lease
for any reason whatsoever prior to the expiration of the term of the Sublease as
provided in the Sublease (other than a termination of the Ground Lease only as
to portions of the premises demised thereby not described in the attached
Exhibit "A"), then Landlord, Developer and Subtenant do hereby agree that the
Sublease, and all terms,


                                  EXHIBIT "C"
                               Page 2 of 7 Pages
<PAGE>
 
provisions, covenants and agreements thereof shall survive any such default or
defaults in, or termination or expiration of the Ground Lease, whether such
termination occurs as a result of, or arising out of, any such default or
defaults, or otherwise, and the Sublease (subject to the rights of any Leasehold
Mortgagee, as defined in the Ground Lease, to enter into a New Lease with
Landlord upon the same terms and conditions and having the same priority as the
Ground Lease, pursuant to subsection 4.8 of the Ground Lease) shall continue in
force and effect in accordance with and subject to all of its terms, provisions,
agreements and covenants as a direct lease with Landlord, as landlord, and
Subtenant, as lessee. Subtenant agrees, in such event, to attorn to Landlord and
to recognize Landlord as the landlord under the Sublease. Landlord shall, in
such event, exercise and undertake all of the rights, obligations and duties of
Developer in and under said Sublease and thereafter shall be entitled to collect
all rents and payments due and payable under said Sublease, including the right
to collect any sums being due and payable thereunder prior to the termination or
expiration of the Ground Lease which are accrued and unpaid by Subtenant on the
date of termination of the Ground Lease. Subtenant agrees not to prepay rentals
under the Sublease beyond the amounts provided in the Sublease without the prior
written consent of Landlord.


    2.  Landlord agrees that, prior to terminating the Ground Lease or taking
any proceedings to enforce any such termination

                                  EXHIBIT "C"
                               Page 3 of 7 Pages
<PAGE>
 
thereof for any reason other than the expiration of the term of the Ground Lease
as provided therein, Landlord shall give Subtenant thirty (30) days' notice in
writing prior to the effective date of such termination, specifying the reason
for such termination. Such notice shall be given to Subtenant at the address
provided in the Sublease for notices to Subtenant. Subtenant may change such
address by written notice to Landlord.


    3.  Landlord hereby approves of the Sublease and of the rights and
privileges granted to Subtenant thereunder and agrees that, for and during the
term of the Sublease and any extensions thereof, Landlord shall not take any
action, directly or indirectly, to disturb or otherwise affect Subtenant's
occupancy of and/or rights and privileges with respect to the premises demised
by the Ground Lease and described on the attached Exhibit "A" so long as
Subtenant is not in default under the Sublease, nor shall Subtenant's exercise
of any such rights or privileges constitute a default under the Ground Lease,
notwithstanding any provisions to the contrary contained in the Ground Lease.


    4.  No provision contained herein shall be deemed an amendment or
modification of any provision contained in the Sublease, including, without
limiting the generality of the foregoing, any rights given thereunder to
Developer to terminate the Sublease.



                                  EXHIBIT "C"
                               Page 4 of 7 Pages
<PAGE>
 
    5.  In the event that the Ground Lease is divided, in accordance with its
terms, into two (2) or more New Leases or Separate Leases, the term "Ground
Lease", as used herein, shall be deemed to refer to the said New Lease or
Separate Lease leasing and demising the subleased premises.


    6.  This Agreement shall be binding upon and shall inure to the benefit of
the parties hereto and their successors, transferees and assigns.



                      THIS SPACE INTENTIONALLY LEFT BLANK


                                  EXHIBIT "C"
                               Page 5 of 7 Pages
<PAGE>
 
    IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the day and year first hereinabove set forth.


                                       BOARD OF WATER COMMISSIONERS OF THE 
                                       CITY OF LONG BEACH


                                       By: _______________________________


                                       Title: ____________________________



                                       KILROY LONG BEACH ASSOCIATES,
                                       A California Limited Partnership


                                       By:  KILROY INDUSTRIES, a California 
                                            Corporation, General Partner


                                       By: ________________________________


                                       Title: _____________________________
                                                      "Developer"


                                       ____________________________________  


                                       ____________________________________
                                                    "Subtenant"

                                  EXHIBIT "C"
                               Page 6 of 7 Pages
<PAGE>
 
    This Agreement is hereby approved as to form this 
day of ________________________, 198__.


                                       JOHN R. CALHOUN
                                       Deputy City Attorney


                                       By:_______________________
                                                 "Deputy"


                                 EXHIBIT "C" 
                               Page 7 of 7 Pages
<PAGE>
 
                                    PARCEL A

THAT PORTION OF LOT 5 OF TRACT NO. 10548 IN THE CITY OF LONG BEACH, COUNTY OF
LOS ANGELES, STATE OF CALIFORNIA, AS PER MAP RECORDED IN BOOK 174 PAGE 15, ET.
SEQ., OF MAPS IN THE OFFICE OF THE COUNTY RECORDER OF SAID COUNTY ALONG WITH
THAT PORTION OF RANCHO LOS CERRITOS IN SAID CITY, AS PER MAP RECORDED IN BOOK 2,
PAGES 202 THROUGH 205 OF PATENTS IN THE OFFICE OF THE COUNTY RECORDER OF SAID
COUNTY DESCRIBED AS A WHOLE AS FOLLOWS:

BEGINNING AT THE EASTERLY TERMINUS OF THAT CERTAIN COURSE DESCRIBED AS HAVING A
BEARING AND LENGTH OF NORTH 89(degrees) 55' 23" WEST 88.37 FEET" IN THE
NORTHERLY BOUNDARY OF THE LAND DESCRIBED IN THE DEED TO THE STATE OF CALIFORNIA,
RECORDED MAY 11, 1959 AS INSTRUMENT NO. 1870 IN BOOK D-462 PAGE 506, OFFICIAL
RECORDS; THENCE ALONG SAID NORTHERLY LINE THE FOLLOWING COURSES: SOUTH
78(degrees) 19' 22" EAST 502.94 FEET TO A ONE INCH IRON PIPE WITH CALTRANS TAG
AND SOUTH 78(degrees) 55' 01" EAST 83.09 FEET TO A ONE INCH IRON PIPE WITH
CALTRANS TAG; THENCE CONTINUING ALONG SAID NORTHERLY LINE AS MONUMENTED BY ONE
INCH IRON PIPES WITH CALTRANS TAGS SOUTH 80(degrees) 14' 32" EAST 523.56 FEET;
THENCE LEAVING SAID NORTHERLY LINE NORTH 9(degrees) 45' 28" EAST 570.00 FEET;
THENCE NORTH 25(degrees) 19' 32" WEST 190.76 FEET; THENCE NORTH 89(degrees)
59' 37" WEST 112.16 FEET; THENCE SOUTH 38(degrees) 20' 44" WEST 49.52 FEET TO 
THE TRUE POINT OF BEGINNING; THENCE SOUTH 38(degrees) 20' 44" WEST 146.94 FEET;
- ---------------------------
THENCE SOUTH 31(degrees) 10' 37" WEST 483.95 FEET TO THE BEGINNING OF A NON-
TANGENT CURVE CONCAVE TO THE NORTH HAVING A RADIUS OF 4954.00 FEET AND TO WHICH
BEGINNING A RADIAL LINE BEARS SOUTH 10(degrees) 03' 32" WEST; THENCE WESTERLY 
139.93 FEET ALONG SAID CURVE THROUGH A CENTRAL ANGLE OF 1(degree) 37' 06"; 
THENCE NORTH 78(degrees) 19' 22" WEST 181.01 FEET; THENCE NORTH 9(degrees)
45' 28" EAST 232.12 FEET; THENCE SOUTH 89(degrees) 53' 01" EAST 233.60 FEET; 
THENCE NORTH 53(degrees) 04' 54" EAST 181.74 FEET; THENCE NORTH 0(degrees)
16' 54" EAST 129.16 FEET TO THE INTERSECTION WITH A LINE BEARING NORTH 
89(degrees) 55' 11" WEST FROM THE TRUE POINT OF BEGINNING; THENCE SOUTH 
89(degrees) 55' 11" EAST 237.51 FEET TO THE TRUE POINT OF BEGINNING.

CONTAINING 146,831 SQUARE FEET.

                                                             [SEAL APPEARS HERE]

                                   EXHIBIT A
                                      To
                                   EXHIBIT C
                               Page 1 of 3 Pages
<PAGE>
 
                                   PARCEL B

THAT PORTION OF LOT 5 OF TRACT NO. 10548 IN THE CITY OF LONG BEACH, COUNTY OF
LOS ANGELES, STATE OF CALIFORNIA, AS PER MAP RECORDED IN BOOK 174 PAGE 15, ET.
SEQ., OF MAPS IN THE OFFICE OF THE COUNTY RECORDER OF SAID COUNTY ALONG WITH
THAT PORTION OF RANCHO LOS CERRITOS IN SAID CITY, AS PER MAP RECORDED IN BOOK 2,
PAGES 202 THROUGH 205 OF PATENTS IN THE OFFICE OF THE COUNTY RECORDER OF SAID
COUNTY DESCRIBED AS A WHOLE AS FOLLOWS:

BEGINNING AT THE EASTERLY TERMINUS OF THAT CERTAIN COURSE DESCRIBED AS HAVING A
BEARING AND LENGTH OF NORTH 89(degrees) 55' 23" WEST 88.37 FEET IN THE NORTHERLY
BOUNDARY OF THE LAND DESCRIBED IN THE DEED TO THE STATE OF CALIFORNIA, RECORDED
MAY 11, 1959 AS INSTRUMENT NO. 1870 IN BOOK D-462 PAGE 506, OFFICIAL RECORDS;
THENCE ALONG SAID NORTHERLY LINE THE FOLLOWING COURSES: SOUTH 78(degrees) 
19' 22" EAST 502.94 FEET TO A ONE INCH IRON PIPE WITH CALTRANS TAG AND SOUTH
78(degrees) 55' 01" EAST 83.09 FEET TO A ONE INCH IRON PIPE WITH CALTRANS TAG;
THENCE CONTINUING ALONG SAID NORTHERLY LINE AS MONUMENTED BY ONE INCH IRON PIPES
WITH CALTRANS TAGS SOUTH 80(degrees) 14' 32" EAST 523.56 FEET; THENCE LEAVING
SAID NORTHERLY LINE NORTH 9(degrees) 45' 28" EAST 570.00 FEET; THENCE NORTH
25(degrees) 19' 32" WEST 190.76 FEET; THENCE NORTH 89(degrees) 59' 37" WEST
112.16 FEET; THENCE SOUTH 38(degrees) 20' 44" WEST 49.52 FEET TO THE TRUE POINT
OF BEGINNING; THENCE NORTH 38(degrees) 20' 44" EAST 120.17 FEET TO THE
INTERSECTION WITH THE SOUTHERLY PROLONGATION OF THE WESTERLY LINE OF PARCEL 4 AS
SHOWN ON A RECORD OF SURVEY IN SAID CITY AS PER MAP FILED IN BOOK 85 PAGE 19 OF
RECORD OF SURVEYS, IN THE OFFICE OF THE COUNTY RECORDER OF SAID COUNTY; THENCE
ALONG THE WESTERLY LINE OF SAID PARCEL AND ITS SOUTHERLY PROLONGATION NORTH
0(degrees) 01' 44" EAST 368.59 FEET TO A POINT ON SAID WESTERLY LINE DISTANT
THEREON SOUTHERLY 26.48 FEET FROM THE NORTHWEST CORNER OF PARCEL 4 OF SAID
RECORD OF SURVEY, SAID POINT BEING THE BEGINNING OF A CURVE CONCAVE TO THE
SOUTHWEST HAVING A RADIUS OF 23.00 FEET; THENCE NORTHWESTERLY 33.21 FEET ALONG
SAID CURVE THROUGH A CENTRAL ANGLE OF 82(degrees) 43' 53" TO THE BEGINNING OF A
REVERSE CURVE CONCAVE TO THE NORTH HAVING A RADIUS OF 1056.00 FEET, SAID CURVE
BEING CONCENTRIC WITH AND DISTANT SOUTHERLY 6.00 FEET FROM THE SOUTHERLY CURVED
SIDE LINE OF SPRING STREET 100.00 FEET WIDE AS SHOWN ON SAID RECORD OF SURVEY;
THENCE WESTERLY 89.13 FEET ALONG SAID CURVE THROUGH A CENTRAL ANGLE OF
4(degrees) 50' 10" TO A POINT NORMAL TO THE WESTERLY END OF SAID SOUTHERLY
CURVED PORTION OF THE SIDE LINE OF SAID SPRING STREET; THENCE CONTINUING ON A
LINE PARALLEL TO AND DISTANT SOUTHERLY 6.00 FEET AT RIGHT ANGLES FROM SAID
SOUTHERLY SIDE LINE NORTH 77(degrees) 51' 59" WEST 74.19 FEET TO THE BEGINNING
OF A CURVE CONCAVE TO THE NORTHEAST HAVING A RADIUS OF 212.00 FEET; THENCE 
LEAVING SAID PARALLEL LINE NORTHWESTERLY 44.57 FEET ALONG SAID CURVE THROUGH A
CENTRAL ANGLE OF 12(degrees) 02' 47"; THENCE ON A NON-TANGENT LINE NORTH 
66(degrees) 53' 00" WEST 6.99 FEET TO A POINT ON THE SOUTHERLY SIDE LINE OF 
SAID SPRING STREET, 100.00 FEET WIDE; THENCE ALONG SAID SIDE LINE NORTH 
77(degrees) 51' 59" WEST 78.06 FEET TO THE BEGINNING OF A CURVE IN SAID 
SOUTHERLY LINE CONCAVE TO THE SOUTH HAVING A RADIUS OF 950.00 FEET; THENCE 
WESTERLY 95.65 FEET ALONG SAID CURVE THROUGH A CENTRAL ANGLE OF 5(degrees) 
46' 06"; THENCE LEAVING SAID SIDE LINE SOUTH 0(degrees) 08' 48" WEST 426.86 
FEET; THENCE NORTH 89(degrees) 58' 42" EAST 58.51 FEET; THENCE SOUTH 0(degrees)
16' 54" WEST 176.34 FEET TO THE INTERSECTION WITH A LINE BEARING NORTH 
89(degrees) 55' 11" WEST FROM THE TRUE POINT OF BEGINNING; THENCE SOUTH 
89(degrees) 55' 11" EAST 237.51 FEET TO THE TRUE POINT OF BEGINNING.

CONTAINING 207,752 SQUARE FEET.    

                                                             [SEAL APPEARS HERE]


                                   EXHIBIT A
                                      TO
                                   EXHIBIT C
                               Page 2 of 3 Pages
<PAGE>
 
                              [MAP APPEARS HERE]






















                                  EXHIBIT A 
                                      To
                                   EXHIBIT C
                               Page 3 of 3 Pages
<PAGE>
 
                                                               BOND NO.:________
                                PERFORMANCE BOND               PREMIUM :________
                                ----------------


KNOW ALL MEN BY THESE PRESENTS, That we ________________________________________
______________________________,  as Principal, and _____________________________
_______________________________________________, as Surety, are held and firmly
bound unto the Board of Water Commissioners of the City of Long Beach, acting on
behalf of the City of Long Beach, a Municipal Corporation (Land Lessor) and
Kilroy Long Beach Associates, a California Limited Partnership (Land Lessee), as
Obligees, in the penal sum of __________________________________________________
_________________________________________________DOLLARS ($ ) lawful money of
the United States, for the payment of which sum truly to be made, we bind
ourselves, our heirs, executors, administrators, successors and assigns, jointly
and severally, firmly by these presents.

THE CONDITION OF THE OBLIGATION IS SUCH, That Whereas, the Principal entered
into a certain agreement which is hereto attached and made a part hereof, with
Kilroy Long Beach Associates, a California Limited Partnership, dated __________
_______________, for ___________________________________________________________
which contract and the specifications and general conditions thereof are hereby
incorporated herein and shall be deemed a part hereof as fully as if set out
herein.

NOW, THEREFORE, if the said Principal shall fully indemnify and save harmless
the Obligees from all loss, liability, costs, damages, penalty, attorney's fees
or expenses which Obligees may incur by reason of failure to well and truly keep
and perform each, every and all of the terms and conditions of said agreement on
the part of the said Principal to be kept and performed, including but not
limited to completion within the time specified of all work covered by said
agreement, performance of all obligation and guarantees of Kilroy Long Beach
Associates, a California Limited Partnership, relating to such work under the
contract with Kilroy Long Beach Associates, a California Limited Partnership;
then this obligation shall be of no effect, but otherwise it shall remain in
full force and effect.

It is a condition hereof that any change, alteration, modification or amendment
of any nature whatsoever that may be made in the terms of said agreement, any
change in the character or scope of the work to be performed, or the method of
performance, under said agreement or modification of said agreement or in the
time for completion thereof, any change in the manner, time or amount of payment
as provided therein, any change of any nature whatsoever that may be made in the
terms of the contract


                                  EXHIBIT "D"

                               Page 1 of 6 Pages
<PAGE>
 
with Kilroy Long Beach Associates, a California Limited Partnership, or any
change that may be made in the performance of the work under said agreement by
the Principal, assented to by Kilroy Long Beach Associates, a California Limited
Partnership, whether made under express agreement or not, may be made without
notice to the Surety and without affecting the obligations of the Surety on this
bond and without requiring the consent of the Surety, and no such change or
changes shall release the Surety from any of its obligations hereunder, the
Surety hereby consenting to and waiving notice of any such change, alteration,
modification or amendment.

It is a further condition hereof that no one other than the named Obligees and
the successors, administrators or assigns of the Obligees shall have any right
of action under this bond.

IN WITNESS WHEREOF, the said Principal and Surety have hereunto set their hands
and seals this _____________ day of ___________________, 19__.



                   __________________________________________________
                                      (Principal)

                   BY:_______________________________________________


                   __________________________________________________
                                       (Surety)

                   BY:_______________________________________________



    Note:  The name "Kilroy Long Beach Associates, a California Limited
           Partnership" would change to the name of any successor Land Lessee.



                                  EXHIBIT "D"

                               Page 2 of 6 Pages
<PAGE>
 
                                 PAYMENT BOND                  BOND NO.:________
                                 ------------                  PREMIUM :________


KNOW ALL MEN BY THESE PRESENTS, That we ________________________________________
_________________________________ as Principal, and  ___________________________
___________________________________________, as Surety, are held and firmly 
bound unto the Board of Water Commissioners of the City of Long Beach, acting 
for and on behalf of the City of Long Beach, a Municipal Corporation (Land 
Lessor) and Kilroy Long Beach Associates, a California Limited Partnership 
(Land Lessee), as Obligees, in the penal sum of ________________________________
______________________________________________________________ DOLLARS ($     ),
lawful money of the United States, for the payment of which sum well and truly
to be made, we bind ourselves, our heirs, executors, administrators, successors
and assigns, jointly and severally, firmly by these presents.


THE CONDITION OF THE OBLIGATION IS SUCH, That Whereas, the Principal entered
into a certain agreement which is hereto attached and made a part hereof, with
Kilroy Long Beach Associates, a California Limited Partnership, dated _________
________________________________, for _________________________________________
which contract and the specifications and general conditions thereof are hereby
incorporated herein and shall be deemed a part hereof as fully as if set out
herein.

NOW, THEREFORE, if the said Principal shall pay promptly and in full the claims
of all persons, firms or corporations, performing labor or furnishing equipment,
materials, or supplies incurred in connection with the contract to be performed
under said agreement and shall indemnify and save harmless of Obligees from all
loss liability, costs, damages, penalty, attorney's fees or expenses for all
taxes, insurance premiums, any and all applicable contributions, allowances or
other payments or deductions, however harmed, required by statute or union labor
agreement, including voluntary payment thereof by the Obligees necessary to
insure orderly prosecution of work or other items or services used in, upon or
for or incurred in connection with the contract to be performed under said
agreement, then this obligation shall be of no effect, but otherwise it shall
remain in full force and effect.

It is a condition hereof that any change, alteration, modification or amendment
of any nature whatsoever that may be made in the terms of said agreement, any
change in the character or scope of the work to be performed, or the method of
performance, under said agreement or any change in manner, time



                                  EXHIBIT "D"

                               Page 3 of 6 Pages
<PAGE>
 
or amount of payment as provided therein, any change of any nature whatsoever
that may be made in the terms of the contract between Kilroy Long Beach
Associates, a California Limited Partnership, or any change that may be made in
the performance of the work under said agreement by the Principal, assented to
by Kilroy Long Beach Associates, a California Limited Partnership, whether made
under express agreement or not, may be made without notice to the Surety and
without affecting the obligations of the Surety on this bond and without
requiring the consent of the Surety and no such change or changes shall release
the Surety from any of its obligations hereunder, the Surety hereby consenting
to and waiving notice of any such change, alteration, modification or amendment.

Subject to the priority of the named Obligees with respect to recovery up to the
penal sum of this bond, persons who have supplied or furnished labor, material,
machinery, equipment or supplies to the Principal for use in the prosecution of
the work provided for in said contract shall have a direct right of action
against said Principal and Surety under this bond.

IN WITNESS WHEREOF, the said Principal and Surety have hereunto set their hands
and seals, this ____  day of ____________________, 19__.


               _________________________________________________
                                 (Principal)

               BY:______________________________________________

               _________________________________________________
                                   (Surety)

               BY:______________________________________________



Note:  The name "Kilroy Long Beach Associates, a California Limited Partnership"
       would change to the name of any successor Land Lessee.



                                  EXHIBIT "D"

                               Page 4 of 6 Pages
<PAGE>
 
                   LENDER'S OBLIGEE RIDER TO PERFORMANCE BOND
                   ------------------------------------------


    WHEREAS, heretofore, on or about the ______ day of _____________,
19__, ______________________________________________________________,
as Contractor, entered into a written agreement with Kilroy Long Beach
Associates, a California Limited Partnership, as Owner of leasehold
improvements, for the construction of _____________________________
____________________________________________________________________,
and

    WHEREAS, the Contractor and _____________________________________
_______________,   a California corporation, as Surety, executed and delivered
to Kilroy Long Beach Associates, a California Limited Partnership, their joint
and several Performance Bond, and

    WHEREAS, Kilroy Long Beach Associates, a California Limited Partnership, has
arranged for a loan for the exclusive purpose of payment for the performance of
said contract and has requested the Contractor and Surety to join with Kilroy
Long Beach Associates, a California Limited Partnership, in the execution and
delivery of this Rider, and the Contractor and Surety have agreed so to do upon
the condition herein stated.

    NOW, THEREFORE, in consideration of one dollar and other good and valuable
consideration receipt of which is acknowledged, the undersigned agree that the
said Performance Bond shall be, and is, amended as follows:

    1.   The name of __________________________________________________,
         as shall be added to said bond as a named Obligee.

    2.   The rights of the Lender as a named Obligee shall be subject to the
         condition precedent that Kilroy Long Beach Associates, a California
         Limited Partnership, obligations to the Contractor be performed.

    3.   The aggregate liability of the Surety under said bond to Kilroy Long
         Beach Associates, a California Limited Partnership, and the Lender, as
         their interests may appear, is limited to the penal sum of the said
         bond.

    4.   The Surety may, at its option, make any payment under said bond by
         check issued jointly to Kilroy Long Beach Associates, a California
         Limited Partnership, and the Lender.

    5.   Except as herein modified, said Performance Bond shall be and remain in
         full force and effect.


                                  EXHIBIT "D"

                               Page 5 of 6 Pages
<PAGE>
 
    Signed, sealed and dated this ______ day of _____________________,
19__.

                                       KILROY LONG BEACH ASSOCIATES, A
                                       California Limited Partnership

ATTEST:_____________________________   BY: KILROY INDUSTRIES, a
                                           California Corporation,
                                           General Partner
                                           
                                           By: ______________________
                                           
                                           Title: ___________________

                                       By: __________________________

                                       By: __________________________
                                                      (Owner)

ATTEST:_____________________________   BY: __________________________

                                           __________________________
                                                   (Surety)

ATTEST:_____________________________   BY: __________________________

                                           __________________________
                                                 (Contractor)


                                  EXHIBIT "D"

                               Page 6 of 6 Pages
<PAGE>
 
                              ASSIGNMENT OF LEASE
                              -------------------


    THIS ASSIGNMENT OF LEASE ("Assignment") is made by the BOARD OF WATER
COMMISSIONERS of the CITY OF LONG BEACH ("Assignor"), whose address is 1800
East Wardlow Road, Long Beach, California 90807, to KILROY LONG BEACH
ASSOCIATES, a California Limited Partnership ("Assignee"), whose address is 2250
East Imperial Highway, Suite 1200, El Segundo, California 90245, and is made
with reference to the following facts and objectives:



                                    RECITALS
                                    --------


    A.  Assignor, acting in the capacity of and therein referred 
to as "Lessor", entered into a written lease, dated ____________
________________, 19___ (the "Lease"), in which Assignor leased to 
__________________________________________________________________
________________, a ___________________________________, acting in
the capacity of and therein referred to as Lessee ("Lessee"), certain 
premises located in the City of Long Beach, County of Los Angeles, 
California, as said premises are more particularly described in Exhibit 
"A", attached hereto and by this reference incorporated herein (the 
"Leased Premises").


    B.  Assignor, acting in the capacity of and therein described as "Landlord",
has entered into a Lease Agreement with



                                  EXHIBIT "E"
                               Page 1 of 4 Pages
<PAGE>
 
Assignee, acting in the capacity of and therein referred to as "Developer",
dated April _______, 1988 (the "Master Lease").  The Master Lease includes the
Leased Premises and other premises. The Master Lease provides in Section 5.9
that Assignor shall assign to Assignee all previously existing leases of the
premises demised by the Master Lease.


    C.  This Assignment is executed to carry out the provisions of Section 5.9
of the Master Lease and to assign to Assignee the Lease.


    NOW THEREFORE, Assignor assigns and transfers to Assignee all of Assignor's
right, title and interest in the Lease, and Assignee accepts the assignment and
assumes and agrees to perform, from the date this Assignment becomes effective,
all the provisions of the Lease.  This Assignment is made on the following
additional covenants and conditions.


    1.  Effective Date of Assignment.  This Assignment shall take effect
        ----------------------------
concurrently with the effective date of the Master Lease on April ____, 1988.


    2.  Assignee To Hold Assignor Harmless.  Assignee shall hold Assignor and
        ----------------------------------
the City of Long Beach, and all of their officers and employees, free and
harmless from any cost, expense, damage or claim of damage, including costs of
defense, arising from the interests or asserted interests of Lessee arising
subsequent to the Effective Date of this Assignment.



                                  EXHIBIT "E"
                               Page 2 of 4 Pages
<PAGE>
 
    3.  Assignor To Hold Assignee Harmless.  Assignor shall hold Assignee free
        ----------------------------------
and harmless from any cost, expense, damage or claim of damage including costs
of defense, arising from acts or events related to the Lease or the Leased
Premises and occurring prior to the Effective Date of this Assignment, unless
such damage or claim of damage is caused or alleged to be caused by this
Assignment or any related transaction.


    4.  Successors-in-Interest.  The provisions of this Assignment shall be
        ----------------------
binding upon and shall inure to the benefit of the heirs, executors, assigns and
successors-in-interest of the parties hereto.







                           INTENTIONALLY LEFT BLANK

                             SIGNATURES ON PAGE 4

                                    

                                  EXHIBIT "E"
                               Page 3 of 4 Pages
<PAGE>
 
    IN WITNESS WHEREOF, Assignor and Assignee have executed this Assignment on
the date opposite their signatures and as of the Effective Date set forth
herein.


                                       BOARD OF WATER COMMISSIONERS OF THE 

                                       CITY OF LONG BEACH


________________, 1988                 By: __________________________________


                                       Title: _______________________________

                                                       "ASSIGNOR"


                                       KILROY LONG BEACH ASSOCIATES,
                               
                                       A California limited partnership


                                       By:  KILROY INDUSTRIES,

                                            A California corporation, 

                                            General Partner

________________, 1988                      By: ______________________________


                                            Title: ___________________________

                                                         "ASSIGNEE"


                                  EXHIBIT "E"
                               Page 4 of 4 Pages
<PAGE>
 
Recording Requested By 
When Recorded Mail To:


MCDANIEL & MCDANIEL
2250 East Imperial Highway
Suite 1200
El Segundo, California 90245

                            SHORT FORM GROUND LEASE
                            -----------------------


    THIS SHORT FORM GROUND LEASE is made and entered into as of this ___________
day of __________________, 198___, by and between BOARD OF WATER COMMISSIONERS
OF THE CITY OF LONG BEACH, acting for and on behalf of the City of Long Beach, a
municipal corporation ("Landlord"), and KILROY LONG BEACH ASSOCIATES, a
California Limited Partnership ("Developer").


                                R E C I T A L S
                                - - - - - - - -


    Landlord does hereby lease and demise to Developer that certain real
property in the City of Long Beach, County of Los Angeles, State of California,
more particularly described in Exhibit "A" attached hereto and all rights,
privileges and easements appurtenant thereto ("Premises" herein) pursuant to and
upon all of the terms, covenants and provisions set forth in that certain
unrecorded Ground Lease dated ____________________________________, ("Ground 
Lease" herein), the terms, covenants and provisions of which are hereby 
incorporated herein and made a part hereof by reference.


                                 EXHIBIT "F" 
                               Page 1 of 7 Pages
<PAGE>
 
    Landlord and Developer do further agree as follows:


    1.  The commencement date of the Ground Lease term is the date first written
above.


    2.  The term of the Ground Lease shall continue for approximately forty-
seven (47) years following the date of execution of the Ground Lease, until 
July 17, 2035, subject to earlier termination as provided in the Ground Lease
and subject to four (4) successive ten (10) year options and one (l) nine (9)
year option to further extend the term of the Ground Lease.


    3.  Developer shall have the right to subdivide the Ground Lease into one or
more separate Ground Leases pursuant to Section 7.6 of the Ground Lease and to
recombine one or more separate Ground Lease into a single Ground Lease pursuant
to Section 7.7 of the Ground Lease. Developer also shall have the right to
encumber its leasehold interest in the Ground Lease (and in each separate Ground
Lease into which the Ground Lease may be subdivided) with one or more Leasehold
Mortgages (as defined in section 4.3.2 of the Ground Lease) in favor of one or
more Leasehold Mortgagees (as defined in section 4.3.3 of the Ground Lease).


    4.  Developer shall pay the real property taxes and assessments against the
Premises during the term hereof, as more specifically provided in the Ground
Lease.


    5.  Notwithstanding that the ownership of Landlord's and Developer's estates
in and to the Premises may become vested in


                                  EXHIBIT "F"
                               Page 2 of 7 Pages
<PAGE>
 
the same party for any reason, no merger of Developer's leasehold estate into
Landlord's fee title shall result or be deemed to result thereby, as provided in
Section 4.20 of the Ground Lease, provided that this provision shall not be
deemed applicable to a termination of Developer's leasehold estate by reason of
Developer's default or a taking under the power of eminent domain.


    6.  The Ground Lease grants to Developer the right to enter upon the
Premises demised thereby for a period of sixty (60) days following the
expiration of the term of the Ground Lease in order to remove any or all of the
buildings and other improvements constructed upon said Premises by or under
Developer.


    7.  The Ground Lease grants to Developer the right to sell any buildings
from time to time constructed upon the Premises, provided that such buildings
shall be and remain subject to the terms and conditions of the Ground Lease and
shall be used and developed only in accordance with the Ground Lease for so long
as such buildings remain upon the Premises.



                                  EXHIBIT "F"
                               Page 3 of 7 Pages
<PAGE>
 
    IN WITNESS WHEREOF, the parties have executed this Short Form Ground Lease
as of the day and year first above written.


                                       BOARD OF WATER COMMISSIONER OF 

                                       THE CITY OF LONG BEACH,


                                       By: ____________________________


                                       Title: _________________________
                                                      "Landlord"


                                       KILROY LONG BEACH ASSOCIATES,
 
                                       a California Limited Partnership,


                                       By: KILROY INDUSTRIES,

                                           a California Corporation, 

                                           General Partner


                                           By: ________________________


                                           Title: _____________________
                                                       "Developer"


                                  EXHIBIT "F"
                               Page 4 of 7 Pages
<PAGE>
 
    This Short Form Ground Lease is hereby approved as to form this ____  day 
of ________________, 19___.



                                            JOHN R. CALHOUN, City Attorney


                                            By: __________________________
                                                          Deputy


                                  EXHIBIT "F"
                               Page 5 of 7 Pages
<PAGE>
 
                           LANDLORD'S ACKNOWLEDGMENT
                           -------------------------
                                  Corporation
                                  -----------


STATE OF CALIFORNIA    )
                       )  ss.
COUNTY OF LOS ANGELES  )


    On ________________, 1988, before me, the undersigned, a Notary Public in 
and for said State, personally appeared _______________________________________
personally known to me or proved to me on the basis of satisfactory evidence to
be the person who executed the within instrument as the ______________________, 
on behalf of the Board of Water Commissioners of the City of Long Beach, the
Municipal corporation that executed the within instrument and acknowledged to me
that said Municipal corporation executed the within instrument pursuant to a
resolution of its City Council.

WITNESS my hand and official seal.


                                             ______________________________
                                             Notary Public in and for said 
                                             State


SEAL


                                  EXHIBIT "F"
                               Page 6 of 7 Pages
<PAGE>
 
                          DEVELOPER'S ACKNOWLEDGEMENT
                          ---------------------------


STATE OF CALIFORNIA     )
                        )  ss.
COUNTY OF LOS ANGELES   )


    On June ____, 1985, before me, the undersigned, a Notary Public in and for
said State, personally appeared _______________________________________________
personally known to me or proved to me on the basis of satisfactory evidence to
be the person who executed this instrument as _________________________________
of Kilroy Industries, the corporation that executed this instrument as the
general partner of Kilroy Long Beach Associates, a California Limited
Partnership, the partnership that executed the within instrument, and
acknowledged to me that such corporation executed the same as such partner and
that said partnership executed the same.


WITNESS my hand and official seal.


                                            ______________________________
                                            Notary Public in and for said 
                                            State


SEAL


                                  EXHIBIT "F"
                               Page 7 of 7 Pages
<PAGE>
 
                                    PARCEL A

THAT PORTION OF LOT 5 OF TRACT NO. 10548 IN THE CITY OF LONG BEACH, COUNTY OF
LOS ANGELES, STATE OF CALIFORNIA, AS PER MAP RECORDED IN BOOK 174 PAGE 15, ET.
SEQ., OF MAPS IN THE OFFICE OF THE COUNTY RECORDER OF SAID COUNTY ALONG WITH
THAT PORTION OF RANCHO LOS CERRITOS IN SAID CITY, AS PER MAP RECORDED IN BOOK 2,
PAGES 202 THROUGH 205 OF PATENTS IN THE OFFICE OF THE COUNTY RECORDER OF SAID
COUNTY DESCRIBED AS A WHOLE AS FOLLOWS:


BEGINNING AT THE EASTERLY TERMINUS OF THAT CERTAIN COURSE DESCRIBED AS HAVING A
BEARING AND LENGTH OF NORTH 89(degrees) 55' 23" WEST 88.37 FEET" IN THE
NORTHERLY BOUNDARY OF THE LAND DESCRIBED IN THE DEED TO THE STATE OF CALIFORNIA,
RECORDED MAY 11, 1959 AS INSTRUMENT NO. 1870 IN BOOK D-462 PAGE 506, OFFICIAL
RECORDS; THENCE ALONG SAID NORTHERLY LINE THE FOLLOWING COURSES: SOUTH
78(degrees) 19' 22" EAST 502.94 FEET TO A ONE INCH IRON PIPE WITH CALTRANS TAG
AND SOUTH 78(degrees) 55' 01,' EAST 83.09 FEET TO A ONE INCH IRON PIPE WITH
CALTRANS TAG; THENCE CONTINUING ALONG SAID NORTHERLY LINE AS MONUMENTED BY ONE
INCH IRON PIPES WITH CALTRANS TAGS SOUTH 80(degrees) 14' 32" EAST 523.56 FEET;
THENCE LEAVING SAID NORTHERLY LINE NORTH 9(degrees) 45' 28" EAST 570.00 FEET;
THENCE NORTH 25(degrees) 19' 32" WEST 190.76 FEET; THENCE NORTH 89(degrees) 
59' 37" WEST 112.16 FEET; THENCE SOUTH 38(degrees) 20' 44" WEST 49.52 FEET TO 
THE TRUE POINT OF BEGINNING; THENCE SOUTH 38(degrees) 20' 44" WEST 146.94 FEET;
- ---------------------------
THENCE SOUTH 31(degrees) 10' 37" WEST 483.95 FEET TO THE BEGINNING OF A NON-
TANGENT CURVE CONCAVE TO THE NORTH HAVING A RADIUS OF 4954.00 FEET AND TO WHICH
BEGINNING A RADIAL LINE BEARS SOUTH l0(degrees) 03' 32" WEST; THENCE WESTERLY
139.93 FEET ALONG SAID CURVE THROUGH A CENTRAL ANGLE OF 1(degree) 37' 06";
THENCE NORTH 78(degrees) 19' 22" WEST 181.01 FEET; THENCE NORTH 9(degrees) 45'
28" EAST 232.12 FEET; THENCE SOUTH 89(degrees) 53' 01" EAST 233.60 FEET; THENCE
NORTH 53(degrees) 04' 54" EAST 181.74 FEET; THENCE NORTH 0(degree) 16' 54" EAST
129.16 FEET TO THE INTERSECTION WITH A LINE BEARING NORTH 89(degrees) 55' 11"
WEST FROM THE TRUE POINT OF BEGINNING; THENCE SOUTH 89(degrees) 55' 11" EAST
237.51 FEET TO THE TRUE POINT OF BEGINNING.


CONTAINING 146,831 SQUARE FEET.


                                   EXHIBIT A
                                      To
                                   EXHIBIT F
                               Page 1 of 3 Pages
<PAGE>
 
                                   PARCEL B

THAT PORTION OF LOT 5 OF TRACT NO. 10548 IN THE CITY OF LONG BEACH, COUNTY OF 
LOS ANGELES, STATE OF CALIFORNIA, AS PER MAP RECORDED IN BOOK 174 PAGE 15, ET. 
SEQ., OF MAPS IN THE OFFICE OF THE COUNTY RECORDER OF SAID COUNTY ALONG WITH 
THAT PORTION OF RANCHO LOS CERRITOS IN SAID CITY, AS PER MAP RECORDED IN BOOK 2,
PAGES 202 THROUGH 205 OF PATENTS IN THE OFFICE OF THE COUNTY RECORDER OF SAID  
COUNTY DESCRIBED AS A WHOLE AS FOLLOWS:

BEGINNING AT THE EASTERLY TERMINUS OF THAT CERTAIN COURSE DESCRIBED AS HAVING A
BEARING AND LENGTH OF NORTH 89 DEGREES 55 MINUTES 23 SECONDS WEST 88.37 FEET IN
THE NORTHERLY BOUNDARY OF THE LAND DESCRIBED IN THE DEED TO THE STATE OF
CALIFORNIA, RECORDED MAY 11, 1959 AS INSTRUMENT NO. 1870 IN BOOK D-462 PAGE 506,
OFFICIAL RECORDS; THENCE ALONG SAID NORTHERLY LINE THE FOLLOWING COURSES: SOUTH
78 DEGREES 19 MINUTES 22 SECONDS EAST 502.94 FEET TO A ONE INCH IRON PIPE WITH
CALTRANS TAG AND SOUTH 78 DEGREES 55 MINUTES 01 SECONDS EAST 83.09 FEET TO A ONE
INCH IRON PIPE WITH CALTRANS TAG; THENCE CONTINUING ALONG SAID NORTHERLY LINE AS
MONUMENTED BY ONE INCH IRON PIPES WITH CALTRANS TAGS SOUTH 80 DEGREES 14 MINUTES
32 SECONDS EAST 523.56 FEET; THENCE LEAVING SAID NORTHERLY LINE NORTH 9 DEGREES
45 MINUTES 28 SECONDS EAST 570.00 FEET; THENCE NORTH 25 DEGREES 19 MINUTES 32
SECONDS WEST 190.76 FEET; THENCE NORTH 89 DEGREES 59 MINUTES 37 SECONDS WEST
112.16 FEET; THENCE SOUTH 38 DEGREES 20 MINUTES 44 SECONDS WEST 49.52 FEET TO
THE TRUE POINT OF BEGINNING; THENCE NORTH 38 DEGREES 20 MINUTES 44 SECONDS EAST
120.17 FEET TO THE INTERSECTION WITH THE SOUTHERLY PROLONGATION OF THE WESTERLY
LINE OF PARCEL 4 AS SHOWN ON A RECORD OF SURVEY IN SAID CITY AS PER MAP FILED IN
BOOK 85 PAGE 19 OF RECORD OF SURVEYS, IN THE OFFICE OF THE COUNTY RECORDER OF
SAID COUNTY; THENCE ALONG THE WESTERLY LINE OF SAID PARCEL AND ITS SOUTHERLY
PROLONGATION NORTH O DEGREES 01 MINUTES 44 SECONDS EAST 368.59 FEET TO A POINT
ON SAID WESTERLY LINE DISTANT THEREON SOUTHERLY 26.48 FEET FROM THE NORTHWEST
CORNER OF PARCEL 4 OF SAID RECORD OF SURVEY, SAID POINT BEING THE BEGINNING OF A
CURVE CONCAVE TO THE SOUTHWEST HAVING A RADIUS OF 23.00 FEET; THENCE
NORTHWESTERLY 33.21 FEET ALONG SAID CURVE THROUGH A CENTRAL ANGLE OF 82 DEGREES
43 MINUTES 53 SECONDS TO THE BEGINNING OF A REVERSE CURVE CONCAVE TO THE NORTH
HAVING A RADIUS OF 1056.00 FEET, SAID CURVE BEING CONCENTRIC WITH AND DISTANT
SOUTHERLY 6.00 FEET FROM THE SOUTHERLY CURVED SIDE LINE OF SPRING STREET 100.00
FEET WIDE AS SHOWN ON SAID RECORD OF SURVEY; THENCE WESTERLY 89.13 FEET ALONG
SAID CURVE THROUGH A CENTRAL ANGLE OF 4 DEGREES 50 MINUTES 10 SECONDS TO A POINT
NORMAL TO THE WESTERLY END OF SAID SOUTHERLY CURVED PORTION OF THE SIDE LINE OF
SAID SPRING STREET; THENCE CONTINUING ON A LINE PARALLEL TO AND DISTANT
SOUTHERLY 6.00 FEET AT RIGHT ANGLES FROM SAID SOUTHERLY SIDE LINE NORTH 77
DEGREES 51 MINUTES 59 SECONDS WEST 74.19 FEET TO THE BEGINNING OF A CURVE
CONCAVE TO THE NORTHEAST HAVING A RADIUS OF 212.00 FEET; THENCE LEAVING SAID
PARALLEL LINE NORTHWESTERLY 44.57 FEET ALONG SAID CURVE THROUGH A CENTRAL ANGLE
OF 12 DEGREES 02 MINUTES 47 SECONDS; THENCE ON A NON-TANGENT LINE NORTH 66
DEGREES 53 MINUTES 00 SECONDS WEST 6.99 FEET TO A POINT ON THE SOUTHERLY SIDE
LINE OF SAID SPRING STREET, 100.00 FEET WIDE; THENCE ALONG SAID SIDE LINE NORTH
77 DEGREES 51 MINUTES 59 SECONDS WEST 78.06 FEET TO THE BEGINNING OF A CURVE IN
SAID SOUTHERLY LINE CONCAVE TO THE SOUTH HAVING A RADIUS OF 950.00 FEET; THENCE
WESTERLY 95.65 FEET ALONG SAID CURVE THROUGH A CENTRAL ANGLE OF 5 DEGREES 46
MINUTES 06 SECONDS; THENCE LEAVING SAID SIDE LINE SOUTH 0 DEGREES 08 MINUTES 48
SECONDS WEST 426.86 FEET; THENCE NORTH 89 DEGREES 58 MINUTES 42 SECONDS EAST
58.51 FEET; THENCE SOUTH 0 DEGREES 16 MINUTES 54 SECONDS WEST 176.34 FEET TO THE
INTERSECTION WITH A LINE BEARING NORTH 89 DEGREES 55 MINUTES 11 SECONDS WEST
FROM THE TRUE POINT OF BEGINNING; THENCE SOUTH 89 DEGREES 55 MINUTES 11 SECONDS
EAST 237.51 FEET TO THE TRUE POINT OF BEGINNING.

CONTAINING 207,752 SQUARE FEET.

                                                          [SEAL HERE]
                                   EXHIBIT A
                                      To
                                   EXHIBIT F
                               Page 2 of 3 Pages
<PAGE>
 



                                   PARCEL B







<PAGE>
 
                                                                   EXHIBIT 10.12
   
                         LONG BEACH MUNICIPAL AIRPORT



                                LEASE AGREEMENT


                                PARCELS 5 & 6



                         KILROY LONG BEACH ASSOCIATES

                       a California Limited Partnership

                                  "DEVELOPER"



                              CITY OF LONG BEACH

                                  "LANDLORD"
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                                                            Page
                                                                            ----
1.  SUBJECT OF LEASE........................................................   2
      1.1    Purpose of Lease...............................................   2
      1.2    Lease of Premises..............................................   3
      1.3    The Project Area...............................................   3
      1.4    The Premises...................................................   3
               1.4.1  Adjacent Properties...................................   3
      1.5    Parties to the Lease Agreement.................................   4
               1.5.1  Landlord..............................................   4
               1.5.2  Developer.............................................   4
               1.5.3  Association by Developer..............................   5

2.  TERM....................................................................   5
      2.1    Basic Term.....................................................   5
      2.2    Options for Extensions.........................................   6

3.  RENT....................................................................   6
      3.1    Minimum Ground Rent............................................   6
               3.1.1  Amount of Ground Rent.................................   6
               3.1.2  Allocation of Ground Rent.............................   6
               3.1.3  Payment of Ground Rent................................   7
               3.1.4  Initial Ground Rent...................................   7
               3.1.5  Inapplicable Provision................................   8
               3.1.6  Inapplicable Provision................................   8
               3.1.7  Due Dates and Place of Payment........................   8
      3.2    Ground Rent Adjustments........................................   8
               3.2.1  Adjustment Dates......................................   8
               3.2.2  Ground Rent Adjustments by
                        Appraisal...........................................   9
                 3.2.2.1 Adjustment for Predevelopment
                           and Infrastructure Costs.........................  10
               3.2.3  Appraisal.............................................  10
               3.2.4  Maximum Rent Increase.................................  12
                 3.2.4.1 Allocation to Parcels..............................  12
                 3.2.4.2 Base Sublease Rental...............................  13
                 3.2.4.3 Sublease Rental Percentage
                           Change...........................................  13
                 3.2.4.4 Adjusted Ground Rent...............................  13
                 3.2.4.5 Sale or Assignment of Lease-
                           hold Interest....................................  14
      3.3    Ground Rent Adjustments Following Reconstruction...............  14
               3.3.1  Ground Rent Adjustments...............................  15
                 3.3.1.1 Adjustment Date....................................  15
                 3.3.1.2 Alternate Adjustment Date..........................  15
               3.3.2  No Adjustment At Next Scheduled
                        Adjustment Date.....................................  16
               3.3.3  Maximum Ground Rent Adjustment........................  16

                                       i
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                  (continued)
                                                                            Page
                                                                            ----

      3.4    Adjustments to Ground Rent During Option
               Term.........................................................  16
      3.5    Maximum Ground Rent Increase...................................  16
      3.6    Definition of Predevelopment and Infra-
               structure Costs..............................................  17
      3.7    Approval of Improvement Plans..................................  17
      3.8    Determination of Predevelopment and
               Infrastructure Costs.........................................  18
      3.9    Inapplicable Provision.........................................  18
      3.10   Inapplicable Provision.........................................  18
      3.11   Inapplicable Provision.........................................  18

4.  LEASEHOLD MORTGAGES.....................................................  18
      4.1    Leasehold Mortgage Authorized..................................  18
      4.2    Notice to Landlord.............................................  19
               4.2.1  Leasehold Mortgage Requirements.......................  19
               4.2.2  Assignment of Leasehold Mortgage......................  19
               4.2.3  Landlord's Acknowledgment of
                         Notice.............................................  19
               4.2.4  Developer to Provide Copies...........................  20
      4.3    Definitions....................................................  20
               4.3.1  Institutional Lender..................................  20
               4.3.2  Leasehold Mortgage....................................  21
               4.3.3  Leasehold Mortgagee...................................  21
      4.4    Consent of Leasehold Mortgagee Required........................  21
      4.5    Default Notice.................................................  21
      4.6    Notice to Leasehold Mortgagee..................................  22
               4.6.1  Landlord's Termination Notice.........................  22
                 4.6.1.1....................................................  23
                 4.6.1.2....................................................  23
                 4.6.1.3....................................................  23
               4.6.2  Proper Address of Leasehold
                         Mortgagee..........................................  24
      4.7    Procedure on Default...........................................  24
               4.7.1  Extension of Termination Notice
                        Period..............................................  24
                 4.7.1.1  Payment of Monetary
                            Obligations.....................................  24
                 4.7.1.2  Foreclosure of Leasehold
                            Mortgage........................................  25
               4.7.2  Cure of Default.......................................  25
               4.7.3  Compliance of Leasehold Mortgagee.....................  26
               4.7.4  Leasehold Mortgage Not an
                        Assignment..........................................  26
               4.7.5  Obligation of Leasehold Mortgagee
                        to Repair or Reconstruct............................  27
               4.7.6  Leasehold Mortgagee's Right to
                        Transfer............................................  28
 
                                       ii
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                  (continued)

                                                                            Page
                                                                            ----
               4.7.7  Leasehold Mortgagee Transfer a
                        Permitted Sale......................................  28
      4.8    New Lease......................................................  29
               4.8.1  Terms of New Lease....................................  29
                 4.8.1.1  Written Request to Landlord.......................  29
                 4.8.1.2  Payment of Obligations............................  29
                 4.8.1.3  Remedy of Developer's Defaults....................  30
                 4.8.1.4  New Lease to Have First
                            Priority........................................  31
                 4.8.1.5  Developer's Obligations Under
                            New Lease.......................................  31
      4.9    New Lease Priorities...........................................  31
      4.10   Eminent Domain.................................................  32
      4.11   Notice of Arbitration..........................................  32
      4.12   Amendment to Facilitate Leasehold Financing....................  32
      4.13   Security Deposit...............................................  32
      4.14   Estoppel Certificate...........................................  33
      4.15   Notices........................................................  34
      4.16   Erroneous Payments.............................................  34
      4.17   Request for Notice for Benefit of Landlord.....................  34
      4.18   Release or Forebearance........................................  35
      4.19   Notice.........................................................  35
      4.20   No Merger......................................................  35
      4.21   No Payment by Landlord.........................................  35
      4.22   Self Liquidating Mortgage......................................  36
      4.23   Leasehold Mortgagee Need Not Cure Specified
               Defaults.....................................................  36
      4.24   Casualty Loss..................................................  36

5.  ASSIGNMENT AND SUBLETTING...............................................  36
      5.1    Prohibition Against Change in Ownership,
               Management and Control.......................................  36
               5.1.1  Name and Address for Notices..........................  37
               5.1.2  Type of Entity........................................  37
               5.1.3  Other Transfers.......................................  37
               5.1.4  Buildings or Land.....................................  38
      5.2    Assignments Not Subject to Approval............................  38
               5.2.1  Death or Incapacity...................................  38
               5.2.2  Family Transfer.......................................  38
               5.2.3  Affiliated Corporation................................  38
               5.2.4  IRS Transfer..........................................  39
               5.2.5  Public Entity.........................................  39
               5.2.6  Partner...............................................  39
               5.2.7  Comprising Entity.....................................  40
      5.3    Assignment Invalid.............................................  40
      5.4    Approval of Assignments........................................  40
               5.4.1  Name..................................................  40
               5.4.2  Description...........................................  40

                                     iii 
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                  (continued)
                                                                            Page
                                                                            ----
 
               5.4.3  Nature of Business....................................  40
               5.4.4  Financial Information.................................  41
               5.4.5  Officers..............................................  41
               5.4.6  Additional Information................................  41
                 5.4.6.1....................................................  41
                 5.4.6.2....................................................  41
                 5.4.6.3....................................................  41
               5.4.7  Informational Purposes................................  41
                 5.4.7.1....................................................  41
                 5.4.7.2....................................................  42
                 5.4.7.3....................................................  42
               5.4.8  Confidentiality.......................................  42
               5.4.9  Disapproval by Landlord...............................  42
      5.5    No Release.....................................................  43
      5.6    Unauthorized Change............................................  43
      5.7    Subletting.....................................................  44
               5.7.1  Minor Subleases.......................................  46
               5.7.2  Consent to Sublease...................................  46
                 5.7.2.1  Description.......................................  46
                 5.7.2.2  Name..............................................  47
                 5.7.2.3  Nature of Business................................  47
                 5.7.2.4  Financial Information.............................  47
                 5.7.2.5  Officers..........................................  47
                 5.7.2.6  Additional Information............................  47
                   5.7.2.6.1................................................  47
                   5.7.2.6.2................................................  47
                   5.7.2.6.3................................................  48
                 5.7.2.7  Informational Purposes............................  48
                   5.7.2.7.1................................................  48
                   5.7.2.7.2................................................  48
                   5.7.2.7.3................................................  48
                   5.7.2.7.4................................................  48
               5.7.3  Confidentiality.......................................  48
               5.7.4  Disapproval by Landlord...............................  48
      5.8    Sale of Buildings..............................................  49

6.  INDEMNITY, INSURANCE, CASUALTY DAMAGE...................................  49
      6.1    Indemnification and Hold Harmless..............................  49
      6.2    Insurance......................................................  50
               6.2.1  Liability Insurance...................................  50
               6.2.2  Fire and Extended Coverage............................  52
               6.2.3  Aviation Facilities...................................  54
               6.2.4  Miscellaneous.........................................  55
               6.2.5  Blanket Policies......................................  56
               6.2.6  Self-Insurance........................................  57
               6.2.7  Insurance Adjustments.................................  57
      6.3    Damage or Destruction..........................................  57
               6.3.1  Restoration of Premises...............................  57
 
                                       iv
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                  (continued)
                                                                            Page
                                                                            ----
 
               6.3.2  Right to Terminate....................................  58
               6.3.3  No Reduction in Rent..................................  59

7.  DEVELOPMENT OF THE  PROJECT.............................................  59
      7.1    Scope of Development...........................................  59
      7.2    Developer's Obligation to Develop Premises.....................  60
               7.2.1  Best Efforts to Sublease..............................  61
      7.3    Architectural Approval.........................................  61
               7.3.1  Restriction...........................................  61
               7.3.2  Basic Concept Documents...............................  61
               7.3.3  Landscaping...........................................  62
               7.3.4  Exterior Elevations...................................  63
               7.3.5  Security and Security Plans...........................  63
               7.3.6  Amendments............................................  64
               7.3.7  Landlord Approval.....................................  64
               7.3.8  Communication and Consultation........................  65
               7.3.9  Requirements of Institutional
                        Lender or Major Occupant............................  66
               7.3.10 Interior Improvements.................................  67
               7.3.11 Modification of Plans.................................  67
      7.4    Performance and Payment Bonds..................................  67
               7.4.1  Agreement to Provide..................................  67
               7.4.2  Term of the Bond......................................  68
               7.4.3  Penal Sum.............................................  69
               7.4.4  Alternative Performance...............................  69
      7.5    Construction...................................................  69
               7.5.1  Costs of Construction.................................  69
               7.5.2  Right to Improve......................................  70
               7.5.3  Governmental Permits..................................  71
               7.5.4  Rights of Access......................................  71
               7.5.5  Local, State and Federal Laws.........................  72
               7.5.6  Antidiscrimination During
                        Construction........................................  72
               7.5.7  Responsibilities of Landlord..........................  72
                 7.5.7.1  Governmental Approvals............................  72
                 7.5.7.2  Easements.........................................  73
                 7.5.7.3  Off-Site Improvements.............................  73
                 7.5.7.4  Bond Financing....................................  74
               7.5.8  Responsibilities of Developer.........................  74
               7.5.9  Maintenance...........................................  75
               7.5.10 Acceptance of Premises................................  75
      7.6    Subdivided Leases..............................................  76
               7.6.1  Same Parties..........................................  76
               7.6.2  Obligations of Subdivided Leases......................  77
               7.6.3  Terms, Covenants......................................  77
                 7.6.3.1  Ground Rent.......................................  77
                 7.6.3.2  Improvements......................................  78
                 7.6.3.3  Easements and CC & R's............................  78
 

                                       v
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                  (continued)
                                                                            Page
                                                                            ----
 
                 7.6.3.4  Description of Property...........................  78
                 7.6.3.5  Excluded Matters..................................  78
      7.7    Combining  Leases..............................................  79
               7.7.1  Ground Rent...........................................  79
               7.7.2  Easements and CC & R's................................  79

8.  USE.....................................................................  79
      8.1    Permitted Development..........................................  79
      8.2    Aviation Related Uses..........................................  80
      8.3    Inapplicable Provision.........................................  80
      8.4    Vehicle Parking................................................  80
      8.5    Federal Aviation Administration................................  80
      8.6    Inspection.....................................................  81

9.  LIENS...................................................................  81
      9.1    Developer's Responsibility.....................................  81
      9.2    Notice of Work.................................................  82
      9.3    Discharge of Liens.............................................  82
      9.4    Landlord's Right to Pay........................................  82
      9.5    Reimbursement of Landlord......................................  83

10. CONDEMNATION............................................................  83
      10.1   Definition of Terms............................................  83
                 10.1.1   Total Taking......................................  83
                 10.1.2   Partial Taking....................................  84
                 10.1.3   Voluntary  Conveyance.............................  84
                 10.1.4   Date of  Taking...................................  84
                 10.1.5   Leased Land.......................................  84
      10.2   Effect of Taking...............................................  85
      10.3   Allocation of Award............................................  85
      10.4   Reduction of Ground Rent on Partial Taking.....................  85
      10.5   Temporary Taking...............................................  86

11. ALTERATIONS BY DEVELOPER................................................  86

12. TAXES AND ASSESSMENTS...................................................  87
      12.1   Payment by Developer...........................................  87
      12.2   Installment Payments...........................................  87
      12.3   Proration......................................................  88
      12.4   Right to Contest...............................................  88

13. CERTIFICATES BY DEVELOPER AND LANDLORD..................................  89
      13.1   Developer to Provide...........................................  89
      13.2   Landlord to Provide............................................  90

14. QUIET ENJOYMENT.........................................................  90

                                      vi
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                  (continued)

                                                                            Page
                                                                            ----

15. TERMINATION AND FURTHER LEASING.........................................  91
      15.1   Termination....................................................  91
      15.2   Termination by Developer.......................................  91
      15.3   Termination by Landlord........................................  91
               15.3.1.......................................................  91
               15.3.2.......................................................  91
               15.3.3.......................................................  91
               15.3.4.......................................................  91
               15.3.5.......................................................  91

16. SECURITY DEPOSIT........................................................  92
      16.1   Good Faith Deposit.............................................  92
               16.1.1   Receipt by Landlord.................................  92
               16.1.2   Form of Deposit.....................................  92
               16.1.3   Interest............................................  93
               16.1.4   If Bond is Posted...................................  94
      16.2   Construction Security Deposits.................................  94
               16.2.1   Form of Construction Deposit........................  95
               16.2.2   Interest............................................  95
               16.2.3   Incorporation by Reference..........................  96
               16.2.4   Return of Deposit...................................  96
               16.2.5   Retention of Deposit by Landlord....................  96

17. GENERAL PROVISIONS......................................................  97
      17.1   Notices, Demands and Communication between
               the Parties..................................................  97
      17.2   Conflict of Interest...........................................  98
      17.3   Enforced Delay: Extension of Time of
               Performance..................................................  98
      17.4   Inspection of Books and Records................................  99
      17.5   Defaults and Remedies..........................................  99
               17.5.1 Defaults - General....................................  99
               17.5.2 Institution of Legal Actions..........................  99
               17.5.3 Applicable Law........................................ 100
               17.5.4 Service of Process.................................... 100
               17.5.5 Rights and Remedies Are
                        Cumulative.......................................... 100
               17.5.6 Inaction Not a Waiver of Default...................... 101
               17.5.7 Remedies.............................................. 101
                 17.5.7.1................................................... 101
                 17.5.7.2................................................... 101
                 17.5.7.3................................................... 102
                 17.5.7.4................................................... 102
               17.5.8 Developer's Rights ................................... 102
               17.5.9 Lease Termination..................................... 102
               17.5.10 Landlord's Exercise of Remedies...................... 103
 
                                      vii
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
                                  (continued)
                                                                            Page
                                                                            ----
 
                 17.5.11  Payment to Developer.............................. 104
                    17.5.11.1  Reimbursement to Landlord.................... 104
                    17.5.11.2  Reimbursement to Developer................... 105
                    17.5.11.3  Ground Rent.................................. 106
                    17.5.11.4  Remaining Balance............................ 106
                 17.5.12  Delivery of Plans................................. 106
      17.6   Right to Contest Laws.......................................... 106
      17.7   Trade Fixtures................................................. 107
      17.8   Continued Possession of Developer.............................. 108
      17.9   Utilities...................................................... 108
      17.10  Surrender...................................................... 108
      17.11  Partial Invalidity............................................. 109
      17.12  Section Headings............................................... 109
      17.13  Short Form Lease............................................... 109
      17.14  Exhibits Incorporated.......................................... 109
      17.15  Entire Agreement, Waivers and Amendments....................... 110
      17.16  Waivers........................................................ 110
      17.17  Approvals...................................................... 110
      17.18  Successors in Interest......................................... 110
      17.19  "And/Or"....................................................... 110
      17.20  "Including" Defined............................................ 111
      17.21  Right of First Refusal to Purchase............................. 111
      17.22  If Developer is a Trustee...................................... 112
      17.23  Limitation of Liability of Partners............................ 112
      17.24  Approvals...................................................... 113
 

                                     viii
<PAGE>
 
                                 DEFINED WORDS
                                 -------------
<TABLE> 
<CAPTION> 


Defined Word                         Paragraph                              Page
- ------------                         ---------                              ----
<S>                                  <C>                                    <C> 
"Adjacent Properties"                  1.4.1                                  3
"Adjusted Fair Market Land Value"      3.2.2.1                                9
"Adjusted Ground Rent"                 3.2.4.4                               13
"adjustment dates"                     3.2.1                                  8
"Affiliated Corporation"               5.2.3                                 38
"Agreement Establishing Developer"     1.5.2                                  4
"and/or"                               17.19                                110
"Approved Plans"                       3.8                                   18
"as-is"                                7.5.10                                75
"Basic Concept Documents"              7.3.2                                 62
"Commencement of Construction"         3.1.3                                  6
"Completion Date"                      5.5                                   43
"date of taking"                       10.1.4                                84
"Developer"                            Intro                                  1
"Developer's Long Beach Airport        7.1                                   60
  Center Submittal"
"FAA"                                  8.5                                   81
"Ground Rent"                          3.1                                    6
"Ground Sublease"                      5.7                                   45
"include"                              17.20                                111
"including"                            17.20                                111
"Institutional Lender"                 4.3.1                                 20
"Landlord"                             Intro                                  1
"Lease"                                Intro                                  1
"leased land"                          10.1.5                                84
 
</TABLE>

                                       x
<PAGE>
 
                                LIST OF EXHIBITS
                                ----------------
<TABLE>
<CAPTION>
                                                    First Appearing at
Ltr.    Description                               Paragraph            Page
- ----    -----------                               ---------            ----
<S>     <C>                                       <C>                 <C>
A       Legal Description of Premises                 1.2               3
B       Site Map of Project Area and                  1.4               3
          Adjacent Properties
C       Parcel Map                                    3.1.2             6
D       Categories of Predevelopment                  3.6              17
          and Infrastructure Costs
E       Form of Nondisturbance                        5.7              44
          Agreement
F       Off-Site Improvements                         7.5.7.3          73
G       Landscaping Plans                             7.3.3            62
H       Exterior Elevations                           7.3.4            63
I       Form of Performance Bond and                  7.4.1            68
          Labor and Material Bond
K       Master FBO Lease                              8.2              80
L       FAA Conditions                                8.5              81
M       Form of Short Form Lease                      17.13           109
 
</TABLE>

                                       ix
<PAGE>
 
                                 DEFINED WORDS
                                 -------------
                                  (continued)
<TABLE>
<CAPTION>
Defined Word                                      Paragraph                 Page
- ------------                                      ---------                 ----
<S>                                               <C>                      <C>
"Leasehold Mortgage"                                4.3.2                    21
"Leasehold Mortgagee"                               4.3.3                    21
"manage"                                            1.5.3                     5
"Master FBO Lease"                                  8.2                      80
"Net Square Footage"                                3.1.1                     7
"New Lease"                                         4.8.1                    29
"nondisturbance agreement"                          5.7                      44
"partial taking"                                    10.1.2                   84
"Predevelopment and Infrastructure                  3.2.2.1                  10
   Costs"
"Premises"                                          1.2                       3
"Project"                                           1.1                       2
"Single Lease"                                      7.7                      79
"Subdivided Lease"                                  7.6                      76
"sublease"                                          5.7                      44
"sublessee"                                         5.7                      45
"Supplement to Kilroy Industries                    7.1                      60
   December 7, 1983, Proposal"
"Termination Notice"                                4.6.1                    23
"Termination Notice Period"                         4.6.1                    23
"total taking"                                      10.1.1                   83
 
</TABLE>

                                       xi
<PAGE>
 
                                LEASE AGREEMENT
                                ---------------


          THIS LEASE AGREEMENT (the "Lease") is made this 30th day of December,
1988, by and between KILROY LONG BEACH ASSOCIATES, a California Limited
Partnership, hereinafter referred to as "Developer", and the CITY OF LONG BEACH,
a municipal corporation, hereinafter referred to as "Landlord".

          This Lease is made with reference to the following facts:

          A.  On or about July 18, 1985, Landlord and Tenant entered into a
lease (the "All-Inclusive Lease") of certain real property described in Exhibit
"A" to the All-Inclusive Lease (the "All-Inclusive Lease Real Property").  The
All-Inclusive Lease Real Property to be developed pursuant to the All Inclusive
Lease is therein and herein referred to as the "Project".  A short form of the
All-Inclusive Lease, dated July 17, 1985, was recorded on November 14, 1986 as
Instrument No. 86-1571363 in Official Records in the Office of the County
Recorder of Los Angeles County, California (the "Recorded Short Form All
Inclusive Lease").

          B.  A Parcel Map has been filed with the County of Los Angeles on July
22, 1988, as Parcel Map No. 16960 in Book 208, pages 92 through 100, of Parcel
Maps in the Office of the County Recorder of said County (the "Parcel Map").
This Parcel Map includes the real property demised by the All-Inclusive Lease,
and other real property.

          C.  The All-Inclusive Lease provides in paragraph 7.6 thereof that the
said All-Inclusive Lease may be subdivided into

                                       1
<PAGE>
 
separate new leases upon notice from Developer to Landlord. Developer gave
written notice to Landlord on August 22, 1988 requesting that the All-Inclusive
Lease by subdivided into three separate leases covering the All-Inclusive Lease
Real Property as follows:

          1.  Parcels 5 and 6 of the Parcel Map (the "Parcel 5 and 6 Lease").

          2.  Parcels 1 and 2 of the Parcel Map (the "Parcel 1 and 2 Lease").

          3.  The All-Inclusive Lease would be reduced in scope and coverage to
    include all of the remainder of the All-Inclusive Lease Real Property
    consisting of Parcels 3 and 4, and an additional Parcel 8 of the Parcel Map.

          D.  This Lease is intended to be the subdivided lease hereinabove
described as the Parcel 5 and 6 Lease, and it shall hereinafter be referred to
as the "Lease".


          NOW THEREFORE Landlord and Developer hereby agree as follows:



          1.  SUBJECT OF LEASE:
              ----------------
              1.1  Purpose of Lease. The purpose of this Lease is to provide for
                   ----------------
the lease and improvement of certain Premises, hereinafter described, as a part
of the Project. This Lease is entered into pursuant to the provisions of Section
7.6 of the All-Inclusive Lease and in order to develop Parcels 5 and 6 of the
Project and not for speculation in land holding. The development of Parcels 5
and 6 of the Project pursuant to and as

                                       2
<PAGE>
 
contemplated by this Lease is in the best interests of Landlord and in accord
with the public purposes and provisions of applicable State and local laws and
requirements under which the Project is to be undertaken.

              1.2  Lease of Premises.  Subject to the terms, covenants and
                   -----------------
conditions of this Lease, Landlord hereby leases to Developer and Developer
hereby takes and hires from Landlord that certain real property (the "Premises)
legally described on Exhibit "A" attached hereto and made a part hereof, upon
the terms and conditions hereinafter set forth.

              1.3  The Project Area.  The area within which the Project is
                   ----------------
located in the City of Long Beach is the area generally described as the area
bounded by Spring Street on the northwest, Taxiway D on the northeast, the San
Diego Freeway on the south and southeast, and the National Guard facility on the
west.

              1.4  The Premises.  The Premises are included in the Project area
                   ------------
illustrated and designated on the site map attached hereto as Exhibit "B" and
the revised Parcel Map No. 16960 attached hereto as Exhibit "C", and forming a
part of this Lease and are legally described in the attached Exhibit "A".

                   1.4.1  Adjacent Properties.  Developer has entered into a
                          -------------------
          separate Lease, dated April 21, 1988, with the Board of Water
          Commissioners of the City of Long Beach (the "Water Department
          Lease"), for the development of certain adjacent properties ("Adjacent
          Properties") identified in Exhibit "B", into the Project for creation
          of an integrated development.  The fair market value and fair market
          Ground Rent and

                                       3
<PAGE>
 
          periodic adjustments thereof of said Adjacent Properties shall be as
          mutually agreed by said Board of Water Commissioners and Developer,
          and by Landlord, as to that portion under jurisdiction of Landlord.

                   Development of the Adjacent Properties shall be governed by
          the Water Department Lease (and Landlord, as to its property).

               1.5 Parties to the Lease Agreement.
                   ------------------------------ 
                   1.5.1  Landlord.  Landlord is a municipal corporation
                          --------
          organized and existing under the laws of the State of California
          acting in its proprietary capacity. The principal office of Landlord
          is located at City Hall, 333 West Ocean Boulevard, Long Beach,
          California 90802. The term "Landlord" as used in this Lease includes
          the City of Long Beach California, and any assignee of or successor to
          its rights, powers and responsibilities.

                   1.5.2  Developer.  Developer is a California limited
                          ---------
          partnership having a principal place of business at 2250 East Imperial
          Highway, Suite 1200, El Segundo, California 90245. A written agreement
          has been executed creating Developer ("Agreement Establishing
          Developer") an executed copy of which has been delivered to Landlord.
          Developer agrees, upon request of Landlord, to provide Landlord with
          any amendments to the Agreement Establishing Developer, so long as
          Kilroy Long Beach Associates, a California Limited Partnership, is the
          party acting as Developer under this Lease. The provisions of the 
          foregoing sentence shall apply to any entity becoming a suc-

                                       4
<PAGE>
 
          cessor to Developer under this Lease or any other lease which may be
          established pursuant hereto covering the Premises.

                   1.5.3  Association by Developer.  Notwithstanding any other
                          ------------------------
          provisions hereof, Developer reserves the right, at its discretion, to
          join and associate with other entities in joint ventures, partnerships
          or otherwise for the purpose of leasing and developing the Premises
          and the Adjacent Properties, and Developer may assign this Lease to
          any such entity, provided that Developer, or any partner of Developer
          having a controlling interest in Developer, continues to manage and
          retain policy control over the development and operation of the
          Premises, until such time as Developer's interests under this Lease
          are assigned as permitted under subsection 5.1, below.  As used
          herein, "manage" shall mean to direct or supervise the operation and
          execution of the development of the Premises and to have authority to
          act for and bind the entity in all dealings with Landlord under this
          Lease.  This definition shall be deemed to require Developer to retain
          policymaking authority.



          2.  TERM:
              ----
              2.1  Basic Term.  The term of this Lease shall commence on the
                   ----------
date of execution of this Lease and shall continue thereafter for a period of
approximately forty-six (46) years, expiring on July 17, 2035.

                                       5
<PAGE>
 
              2.2  Options for Extensions.  Subject to approval by the Long
                   ----------------------
 Beach City Council and subject to the review by Landlord of Lease provisions
 pursuant to Section 37380(b)(1) of the Government Code, Developer shall have
 an option for four (4) Lease extensions of ten (10) years each and a final
 Lease extension of nine (9) years, so that the total possible duration of this
 Lease will be ninety-nine (99) years. Developer may request at any time after
 six (6) months following the effective date of this Lease that Landlord
 formally consider the granting of such Lease extensions, and Landlord shall act
 upon such request within ninety (90) days after receipt thereof.



          3.  RENT:
              ----
              3.1  Minimum Ground Rent.  From commencement of the term of this
                   -------------------
Lease, the Ground Rent ("Ground Rent") payments shall be as follows:

                   3.1.1  Amount of Ground Rent.  Developer shall pay as initial
                          ---------------------
          Ground Rent, the sum of Two Hundred Ninety Five Thousand, Four Hundred
          Twenty-Eight and 97/100 ($295,428.97) per year, which is stated by the
          parties to be pro rata share for this lease of ten percent (10%) of
          initial stated value of the land included in the Premises, which in
          turn is agreed by the parties to be Two Million Nine Hundred Fifty-
          Four Thousand, Two Hundred Eighty-Nine and 70/100 Dollars
          ($2,954,289.70).

                   3.1.2  Allocation of Ground Rent.  Developer initially
                          -------------------------
          intends to develop the Premises as two (2) distinct parcels, which are
          designated as Parcel 5 and

                                       6
<PAGE>
 
          Parcel 6 of Parcel Map No. 16960 attached hereto and marked Exhibit
          "C" for reference, with one or more buildings per parcel. The initial
          Ground Rent obligation described in this subsection 3.1.1. shall be
          allocated between Parcel 5 and Parcel 6 in the proportion that the net
          square footage of land contained in each parcel bears to the net
          square footage of the land in the entire Premises. "Net square
          footage" of land means that portion of the land not subject to
          dedication for public streets and sidewalks.

                   3.1.3  Payment of Ground Rent.  The obligation to pay Initial
                          ----------------------
          Ground Rent is acknowledged to have commenced on Parcel 5 on July 21,
          1988 and on Parcel 6 on July 27, 1988, pursuant to the provisions of
          the All-Inclusive Lease. Such Initial Ground Rent for Parcel 5 and
          Parcel 6 shall be prorated and paid under the All-Inclusive Lease
          until the date of this Lease, and thereafter shall be paid pursuant to
          the provisions of this Lease.

                   3.1.4  Initial Ground Rent.  The initial Ground Rent due for
                          -------------------
          each parcel shall be a sum equal to fifty percent (50%) of the Ground
          Rent attributable to such parcel. Payment of Ground Rent shall
          continue at that rate until either six (6) months after issuance of an
          Initial Temporary Certificate of Occupancy on the building shell or
          commencement of subtenant rent, whichever occurs earlier, at which
          time the full Ground Rent attributable to that parcel shall become
          payable.

                                       7
<PAGE>
 
                   3.1.5  Inapplicable Provision.
                          ----------------------

                   3.1.6  Inapplicable Provision.
                          ----------------------

                   3.1.7  Due Dates and Place of Payment.  Ground Rents
                          ------------------------------
          described herein shall be payable in installments due the first day of
          each month. Payment shall be made to the City of Long Beach at the
          office of the Airport Manager, 4100 Donald Douglas Drive, Long Beach,
          California 90808. Ground Rent installments will be deemed late on the
          tenth (10th) day of the month and shall bear interest until the
          installment is paid at the rate received by the City of Long Beach on
          its investment portfolio during the preceding quarter, provided said
          interest rate shall not exceed twenty percent (20%) per year.

                   3.2  Ground Rent Adjustments.
                        -----------------------
                        3.2.1  Adjustment Dates. In order to adjust the annual
                               ----------------
          Ground Rent for each parcel, the fair market

                                       8
<PAGE>
 
          land value of each parcel and the prevailing rate of return shall be
          determined in the tenth (10th) year after commencement of payment of
          the full Ground Rent for such parcel, and adjusted Ground Rent
          payments shall take effect on the first (1st) day of the eleventh
          (11th) year. The fair market land value and prevailing rate of return
          for each parcel shall be determined in the year 2000, with respect to
          Ground Rent payable commencing January 1, 2001, and every five (5)
          years thereafter, and the Ground Rent shall be adjusted accordingly on
          the first (1st) day of each sixth (6th) year. Said dates of adjustment
          of Ground Rent shall be referred to for convenience as "adjustment
          dates".

                        3.2.2  Ground Rent Adjustments by Appraisal. With
                               ------------------------------------
          respect to each Ground Rent adjustment date, the fair market land
          value and prevailing rate of return shall be determined by agreement
          between Landlord and Developer, but should they not be able to agree
          at least two hundred ten (210) days prior to an adjustment date, then
          such fair market land value and prevailing rate of return shall be
          determined by appraisal by an analysis of comparable land transactions
          committed to the same usage and either zoned for or improved with
          facilities of similar density and height considerations, and/or such
          other appraisal method(s) recognized by the appraisal profession as
          are appropriate for fair market land value appraisals and mutually
          agreed to by the appraisers at time of reevaluation as being
          appropriate,

                                       9
<PAGE>
 
          recognizing market conditions that prevail as of the date of value.

                        3.2.2.1  Adjustment for Predevelopment and
                                 ---------------------------------
          Infrastructure Costs. The fair market land value of the Premises (as
           --------------------
          agreed upon by Landlord and Developer or as determined by appraisal)
          shall be adjusted (the "Adjusted Fair Market Land Value") in the
          proportion that Two Million, Nine Hundred Fifty-Four Thousand, Two
          Hundred Eighty-Nine and 70/100 Dollars ($2,954,289.70) bears to the
          original stated land value of the Premises of Two Million, Nine
          Hundred Fifty-Four Thousand, Two Hundred Eighty-Nine and 70/100
          Dollars ($2,954,289.70), plus the pro rata portion of the actual
          onsite and off-site "Predevelopment and Infrastructure Costs",
          applicable to the Premises, determined according to subsection 3.8.
          The Adjusted Fair Market Land Value shall be converted into an annual
          Ground Rent obligation based on the prevailing rate of return as
          determined pursuant to subsection 3.2.2.

              3.2.3  Appraisal.  In the event the parties are unable to agree
                     ---------
          upon the fair market rental value or the prevailing rate of return or
          the method of appraisal of the Premises at any adjustment date, the
          fair rental value of the subject land and/or the prevailing rate of
          return shall be determined by appraisals prepared by two appraisers,
          one appointed by the Landlord at its expense and one appointed by the
          Developer

                                      10
<PAGE>
 
          at its expense, both of whom shall be MAI members of the American
          Institute of Real Estate Appraisers or a successor organization in the
          event the American Institute of Real Estate Appraisers ceases to
          exist. Said appraisers shall be appointed not more than six (6) months
          prior to the commencement of the rental adjustment period but, in any
          event, within thirty (30) days after either party has given notice in
          writing of inability to agree. Both appraisals must be completed and
          submitted to the Landlord and Developer respectively within sixty (60)
          days after the appointment of the appraisers. The two appraisals shall
          be averaged unless the higher of the two appraisals exceeds the lesser
          by ten percent (10%) or more, in which case the two appraisers shall
          appoint a third appraiser, also an MAI member of the American
          Institute. In order to select such third appraiser, if the two
          appraisers do not agree, the appraisers shall obtain a list of five
          appraisers from the President of the American Institute of Real Estate
          Appraisers and shall alternately strike names from such list until one
          remains to become the third appraiser. The third appraiser shall be
          appointed by the first two appraisers within fourteen (14) days after
          notice from either of the parties to this Lease that the appointment
          of a third appraiser is necessary. The cost of such third appraiser
          shall be shared equally by the parties to this Lease. The third
          appraiser shall complete and submit the required appraisal to

                                      11
<PAGE>
 
          both parties within sixty (60) days after appointment. All appraisals
          shall be in the form of written reports supported by facts and
          analysis. The two of the three appraisers arriving at values closest
          to each other shall attempt to concur on a value. If they are unable
          to do so within thirty (30) days, the two closest appraisals shall be
          averaged and that value shall be the fair market value of the land or
          the prevailing rate of return, as appropriate. The total appraised
          value of both parcels shall not exceed the appraised value of the
          Premises. The Adjusted Fair Market Land Value shall be converted into
          an annual Ground Rent obligation based on the prevailing rate of
          return on similar ground leases then current in the market.
          Disagreements between the two appraisers as to the method of appraisal
          shall be resolved by a third appraiser, appointed in the manner
          described in this subsection.

              3.2.4  Maximum Rent Increase.  The increase if any, in Ground Rent
                     ---------------------
          at the time of any adjustment date shall be limited for parcels upon
          which one or more buildings have been constructed by the increase in
          subtenant rents as described in this section:

                     3.2.4.1  Allocation to Parcels.  At the time of execution
                              ---------------------
             of the Lease, the Ground Rent shall be allocated between the
             parcels within the Premises in the manner set out in subsection
             3.1.2. The percentage of rent attributable to each parcel shall
             remain in effect during the term of the Lease

                                      12
<PAGE>
 
             unless parcel areas change.

                     3.2.4.2.  Base Sublease Rental.  The base sublease rental
                               --------------------
             for each parcel shall be the total annualized rent, stabilized to
             exclude free rent, reduced rent or excess tenant improvement
             amortization or other similar concessions or considerations
             measured in the first year in which more than eighty percent (80%)
             of the rentable space on a given parcel is rented, prorated to full
             occupancy.

                     3.2.4.3  Sublease Rental Percentage Change. The sublease
                              ---------------------------------
             rental percentage change shall be determined by calculating the
             percentage changes in sublease rental between the base sublease
             rental for a parcel described in subsection 3.2.4.2 above and the
             actual sublease rental due to Developer for the same parcel in the
             full year preceding a Ground Rent Adjustment date, stabilized to
             exclude any free rent, reduced rent or excess tenant improvement
             amortization or other similar concessions or considerations.

                     3.2.4.4  Adjusted Ground Rent. The "Adjusted Ground Rent"
                              --------------------
             for each parcel at any given adjustment period shall be the lesser
             of the Adjusted Fair Market Rental Value for such parcel as
             determined in subsection 3.2.2 above or the initial Ground Rent for
             such parcel plus the product of the Sublease Rental Percentage
             Change determined in 3.2.4.3 above times the initial

                                      13
<PAGE>
 
             Ground Rent for such parcel. To the extent that the Adjusted Fair
             Market Rental Value is greater than the Adjusted Ground Rent, the
             difference may be carried forward into the next five (5) year
             adjusted rental period but not into any subsequent five (5) year
             adjusted rental periods, and thereby recovered by Landlord. The
             amount of Ground Rent during a five (5) year adjusted rental period
             where there has been such a carry forward shall not exceed one
             hundred ten percent (110%) of the fair market Ground Rent as
             determined for that period.

                    3.2.4.5  Sale or Assignment of Leasehold Interest.
                             ----------------------------------------
             Should Developer sell, assign or otherwise transfer its leasehold
             interest to an owner-user such that sublease rental is not paid to
             Developer, the fair market sublease rental for such building, using
             the criteria and methods set out in subsection 3.2.2, shall become
             the basis for calculating the maximum rental adjustment using the
             process described in 3.2.4.3 above.

             3.3  Ground Rent Adjustments Following Reconstruction.  Developer
                  ------------------------------------------------  
contemplates, pursuant to Section 11 hereof, that during the term of this Lease,
any or all of the buildings developed on the Premises may be demolished and new
buildings constructed in their place in order to meet the then current market
demand, subject to Landlord approval pursuant to Section 7.  In the event of
such demolition and new construction on a particular

                                       14
<PAGE>
 
parcel, the provisions of subsection 3.2 shall be modified with respect to such
parcel as set forth below in subsections 3.3.1 and 3.3.2.  This subsection 3.3
shall not apply to demolition and new construction which is due to damage or
destruction, as described in subsection 6.3, where said new construction is
limited to one for one replacement of useable or rentable floor area in the same
general building configuration as that which previously existed.

                   3.3.1  Ground Rent Adjustments.  Ground Rent for such parcel
                          -----------------------
          shall be adjusted according to the process set out in subsections
          3.2.2 and 3.2.3 but the limitations in subsection 3.2.4 shall not
          apply to such adjustment.

                        3.3.1.1  Adjustment Date.  The adjustment shall be
                                 ---------------
               effective either six (6) months after issuance of an Initial
               Temporary Certificate of Occupancy of the building shell or
               commencement of subtenant rent, whichever occurs earlier; or

                        3.3.1.2  Alternate Adjustment Date.  In the event a
                                 -------------------------
               regular five (5) year Ground Rent adjustment date for the parcel,
               as established in subsection 3.2.1, occurs after commencement of
               demolition of a building on said parcel and prior to completion
               of construction of a new building in its place, said adjustment
               shall take place on schedule and shall be based upon the
               assumption that construction of the planned new building has been
               completed.

                                       15
<PAGE>
 
                        3.3.2  No Adjustment At Next Scheduled Adjustment Date.
                               -----------------------------------------------
               There shall be no Ground Rent adjustment for such parcel at the
               next scheduled adjustment date, but all subsequent Ground Rent
               adjustments shall occur on the schedule set out in subsection
               3.2.1.

                        3.3.3  Maximum Ground Rent Adjustment. For purposes of
                               ------------------------------
               determining the maximum Ground Rent increase under subsection
               3.2.4 at the time of the next Ground Rent adjustment and
               thereafter, the base sublease rental described in subsection
               3.2.4 shall be established with respect to the new building or
               buildings constructed on the parcel.

               3.4  Adjustments to Ground Rent During Option Term. At the
                    ---------------------------------------------
commencement of each option term, and at the end of each five (5) years of each
option term, the Ground Rent shall be determined as provided in subsection
3.2.2, but with no adjustment thereto as is provided in said subsection 3.2.2.1.
The fair market land value shall be converted into an annual Ground Rent
obligation based on the rate of return then current in the market for parcels
which are currently and fairly appraised.

              3.5  Maximum Ground Rent Increase. However, the increase in Ground
                   ----------------------------
Rent at the end of five (5) years of each option term shall be subject to the
provisions of subsection 3.2.4, with the first year of the option term as the
base period for determining sublease rental and the fifth (5th) year of the
option term being the adjustment year for determining actual rental received,
both to be stabilized to exclude any free rent, reduced rent, excess tenant
improvement amortization or other

                                      16
<PAGE>
 
similar concessions or considerations.  The Ground Rent commencing the sixth
(6th) year of any option term cannot increase at a percentage rate greater than
the percentage increase in sublease rentals from the base year to the adjustment
year.

          3.6  Definition of Predevelopment and Infrastructure Costs.  For
               -----------------------------------------------------
purposes of this Lease, Predevelopment and Infrastructure Costs shall include
the pro rata portion applicable to the Premises of all costs actually incurred
by Developer for those items identified in Exhibit "D", subject to the
limitations of this subsection, which costs are necessary to initially render
the Premises suitable for development according to Developer's Basic Concept
Documents as described in Section 7.  Predevelopment and Infrastructure Costs
shall include all off-site and on-site improvements required to create six (6)
buildable parcels, but shall not include any costs directly associated with the
construction of buildings or parking upon such parcels.  It is understood and
agreed by Landlord that certain improvements particularly landscaping, may
exceed the standards normally used by the City of Long Beach, and that such
improvements shall be included in Predevelopment and Infrastructure Costs to the
extent they are consistent with Developer's Basic Concept Documents and
landscape plans described in Section 7.

          3.7  Approval of Improvement Plans.  Prior to commencement of any
               -----------------------------
construction on the Premises, Developer submitted to Landlord engineering plans
and costs estimates for those items identified in Exhibit "D" which are included
in Predevelopment and Infrastructure Costs.  Specifications for all improvements
shall meet or, at Developer's election, exceed the standard

                                       17
<PAGE>
 
specifications of the City of Long Beach for such improvements. Landlord
reviewed said plans for conformity with the Basic Concept Documents and approved
them as to such conformity in accordance with the procedures and criteria set
out in subsection 7.3.7.

          3.8  Determination of Predevelopment and Infrastructure Costs.
               --------------------------------------------------------
Predevelopment and Infrastructure Costs for the entire Project shall be
determined in the manner described in Sections 3.6 through 3.11, inclusive, of
the All-Inclusive Lease as if the All-Inclusive Lease had not been subdivided.
At such time as such Predevelopment and Infrastructure Costs have been so
determined pursuant to the All-Inclusive Lease, a portion of such Predevelopment
and Infrastructure Costs shall be allocated to this Lease in the ratio as the
square footage of the area of the Premises included in this Lease bears to the
entire square footage of the area of the All-Inclusive Lease prior to the
subdivision of the All-Inclusive Lease, excluding for such purposes any of the
areas included in Parcel 8 of the Parcel Map, as said Parcel 8 has a different
rental calculation procedure from the balance of the real property included
within the Project.

          3.9  Inapplicable Provision.
               ----------------------
          3.10 Inapplicable Provision.
               ----------------------

          3.11 Inapplicable Provision.
               ----------------------


      4.  LEASEHOLD MORTGAGES:
          -------------------
          4.1  Leasehold Mortgage Authorized.  On one or more occasions
               -----------------------------
Developer may take back a Purchase Money Leasehold Mortgage upon a sale and
assignment of the Leasehold Estate created by this Lease or may mortgage or
otherwise encumber Developer's Leasehold Estate to an Institutional Lender (as
hereinafter de-

                                      18
<PAGE>
 
fined), under one or more Leasehold Mortgages and assign this Lease as security
for such Mortgage or Mortgages.

          4.2  Notice to Landlord.
               ------------------
               4.2.1  Leasehold Mortgage Requirements. If Developer shall, on
                      -------------------------------
       one or more occasions, take back a Purchase Money Leasehold Mortgage upon
       a sale and assignment of the Leasehold Estate or shall mortgage
       Developer's Leasehold Estate to an Institutional Lender, and if the
       Holder of such Leasehold Mortgage shall provide Landlord with notice of
       such Leasehold Mortgage together with a true copy of such Leasehold
       Mortgage and the name and address of the Mortgagee, Landlord and
       Developer agree that, following receipt of such notice by Landlord, the
       provisions of this Section 4 shall apply in respect to each such
       Leasehold Mortgage.

               4.2.2  Assignment of Leasehold Mortgage.  In the event of any
                      --------------------------------
       assignment of a Leasehold Mortgage or in the event of a change of address
       of a Leasehold Mortgagee or of an assignee of such Mortgage, notice of
       the new name and address shall be provided to Landlord within ten (10)
       days after completion of such assignment.

               4.2.3  Landlord's Acknowledgment of Notice. Landlord shall
                      -----------------------------------
       promptly upon receipt of a communication purporting to constitute the
       notice provided for by subsections 4.2.1 or 4.2.2, above, acknowledge by
       an instrument in recordable form receipt of such communication as
       constituting the notice provided for by subsections 4.2.1 or 4.2.2, or,
       in the alternative, notify

                                       19
<PAGE>
 
       Developer and the Leasehold Mortgagee of the rejection of such
       communication as not conforming with the provisions of subsections 4.2.1
       or 4.2.2, and specify the specific basis of such rejection.

              4.2.4  Developer to Provide Copies.  After Landlord has received
                     ---------------------------
       the notice provided for by subsections 4.2.1 or 4.2.2 above, Developer,
       upon being requested to do so by Landlord, shall within ten (10) days
       provide Landlord with copies of the note or other obligation secured by
       such Leasehold Mortgage and of any other documents pertinent to the
       Leasehold Mortgage as specified by Landlord. If requested to do so by
       Landlord, Developer shall thereafter also provide Landlord from time to
       time with a copy of each amendment or other modification or supplement to
       such instruments. All recorded documents shall be accompanied by the
       appropriate certification of the Custodian of the Recording Office as to
       their authenticity as true and correct copies of the official records and
       all nonrecorded documents shall be accompanied by a certification by
       Developer that such documents are true and correct copies of the
       originals. From time to time upon being requested to do so by Landlord,
       Developer shall also notify Landlord of the date and place of recording
       and other pertinent recording data with respect to such instruments as
       have been recorded.

              4.3  Definitions.
                   -----------
                   4.3.1  Institutional Lender.  The term "Insti-
                          --------------------

                                      20
<PAGE>
 
       tutional Lender" as used in this Section 4 shall refer to a savings
       bank, savings and loan association, commercial bank, trust company,
       credit union, insurance company, college, university, real estate
       investment trust or pension fund. The term "Institutional Lender" shall
       also include other lenders of substance which have assets in excess of
       Fifty Million and No/l00 Dollars ($50,000,000.00) at the time the
       Leasehold Mortgage is made.

                  4.3.2  Leasehold Mortgage.  The term "Leasehold Mortgage" as
                         ------------------
       used in this Section 4 shall include a mortgage, a deed of trust, a deed
       to secure debt, or other security instrument by which Developer's
       Leasehold Estate is mortgaged, conveyed, assigned or otherwise
       transferred, to secure a debt or other obligation.

                  4.3.3  Leasehold Mortgagee.  The term "Leasehold Mortgagee"
                         -------------------
       as used in this Section 4 shall refer to a holder of a Leasehold Mortgage
       in respect to which the notice provided for by subsection 4.2 has been
       given and received and as to which the provisions of this Section 4 are
       applicable.

              4.4 Consent of Leasehold Mortgagee Required.  No cancellation,
                  ---------------------------------------         
surrender or modification of this Lease shall be effective as to any Leasehold
Mortgagee unless consented to in writing by such Leasehold Mortgagee.

              4.5 Default Notice.  Landlord upon providing Developer any notice
                  --------------
of: (i) default under this Lease, (ii) a termination of this Lease, or (iii) a
matter of which Landlord

                                       21
<PAGE>
 
may predicate or claim a default, shall at the same time provide a copy of such
notice to every Leasehold Mortgagee. No such notice by Landlord to Developer
shall be deemed to have been duly given unless and until a copy thereof has been
so provided to every Leasehold Mortgagee having a lien upon the Premises. From
and after the date such notice has been given to a Leasehold Mortgagee, such
Leasehold Mortgagee shall have the same period, after giving of such notice upon
it, for remedying any default or acts or omissions which are the subject matter
of such notice or causing the same to be remedied, as is given Developer after
the giving of such notice to Developer, plus in each instance, the additional
periods of time specified in subsections 4.6 and 4.7 to remedy, commence
remedying or cause to be remedied the defaults or acts or omissions which are
the subject matter of such notice specified in any such notice. Landlord shall
accept such performance by or at the instigation of such Leasehold Mortgagee as
if the same had been done by Developer. Developer authorizes each Leasehold
Mortgagee to take any such action at such Leasehold Mortgagee's option and does
hereby authorize entry upon the Premises by the Leasehold Mortgagee for such
purpose.

              4.6  Notice to Leasehold Mortgagee.
                   -----------------------------
                   4.6.1  Landlord's Termination Notice.  Anything contained in
                          -----------------------------
          this Lease to the contrary notwithstanding, if any default shall occur
          which entitles Landlord to terminate this Lease, Landlord shall have
          no right to terminate this Lease unless, following the expiration of
          the period of time given Developer to cure such

                                       22
<PAGE>
 
          default or the act or omission which gave rise to such default,
          Landlord shall notify every Leasehold Mortgagee of Landlord's intent
          to so terminate ("Termination Notice") at least thirty (30) days in
          advance of the proposed effective date of such termination if such
          default is capable of being cured by the payment of money
          ("Termination Notice Period"), and at least sixty (60) days in advance
          of the proposed effective date of such termination if such default is
          not capable of being cured by the payment of money (also a
          "Termination Notice Period"). The provisions of subsection 4.7, shall
          apply if, during such thirty (30) or sixty (60) day Termination Notice
          Period, any Leasehold Mortgagee shall:

                       4.6.1.1  Notify Landlord of such Leasehold Mortgagee's
             desire to nullify such notice; and

                       4.6.1.2  Pay or cause to be paid all Ground Rent,
             additional rent and other payments then due and in arrears as
             specified in the Termination Notice to such Leasehold Mortgagee and
             which may become due during such thirty (30) or sixty (60) day
             Termination Notice Period; and

                       4.6.1.3  Comply or in good faith, with reasonable
             diligence and continuity, commence to comply with all nonmonetary
             requirements of this Lease then in default and reasonably
             susceptible of being complied with by such Leasehold Mortgagee;
             provided however, that such Leasehold Mortgagee

                                      23
<PAGE>
 
                 shall not be required during such sixty (60) day Termination
                 Notice Period to cure or commence to cure any default
                 consisting of Developer's failure to satisfy and discharge any
                 lien, charge or encumbrance against the Developer's interest in
                 this Lease or the Premises junior in priority to the lien of
                 the mortgage held by such Leasehold Mortgagee.

                      4.6.2 Proper Address of Leasehold Mortgagee. Any notice to
                            -------------------------------------
             be given by Landlord to a Leasehold Mortgagee pursuant to any
             provision of this Section 4 shall be deemed properly addressed if
             sent to the Leasehold Mortgagee who served the notice referred to
             in subsection 4.2.1 unless notice of a change of Mortgage ownership
             has been given to Landlord pursuant to subsection 4.2.2.

                   4.7  Procedure on Default.
                        --------------------  
                      4.7.1  Extension of Termination Notice Period. If Landlord
                             --------------------------------------
             shall elect to terminate this Lease by reason of any default of
             Developer, and a Leasehold Mortgagee shall have proceeded in the
             manner provided for by subsection 4.6, the specified date for the
             termination of this Lease as fixed by Landlord in its Termination
             Notice shall be extended for a period of six (6) months, provided
             that such Leasehold Mortgagee shall during such six (6) month
             period:

                         4.7.1.1  Payment of Monetary Obligations. Pay or cause
                                  -------------------------------
                 to be paid the Ground Rent, additional rent and other monetary
                 obligations of Developer

                                      24
<PAGE>
 
                 under this Lease as the same become due, and continue its good
                 faith efforts to perform all of Developer's other obligations
                 under this Lease.

                             4.7.1.2  Foreclosure of Leasehold Mortgage. If not
                                      ---------------------------------
                 enjoined or stayed, take steps to acquire or sell Developer's
                 interest in this Lease by foreclosure of the Leasehold Mortgage
                 or other appropriate means and prosecute the same to completion
                 with due diligence.

                        4.7.2  Cure of Default.  If at the end of such six (6)
                               ---------------
          month period such Leasehold Mortgagee is complying with subsections
          4.7.1.1 and 4.7.1.2, this Lease shall not then terminate, and the time
          for completion by Leasehold Mortgagee of its proceedings shall
          continue so long as such Leasehold Mortgagee is enjoined or stayed and
          thereafter for so long as such Leasehold Mortgagee proceeds to
          complete steps to acquire or sell Developer's interest in this Lease
          by foreclosure of the Leasehold Mortgage or by other appropriate means
          with reasonable diligence and continuity. Nothing in this subsection
          4.7, however, shall be construed to extend this Lease beyond the
          original term thereof as extended by any options to extend the term of
          this Lease properly exercised by Developer or a Leasehold Mortgagee in
          accordance with subsection 2.1, nor to require a Leasehold Mortgagee
          to continue such foreclosure proceedings after the default has been
          cured. If the default shall be cured and the Leasehold Mortga-

                                      25
<PAGE>
 
          gee shall discontinue such foreclosure proceedings, this Lease shall
          continue in full force and effect as if Developer had not defaulted
          under this Lease.

                        4.7.3  Compliance of Leasehold Mortgagee. If a Leasehold
                               ---------------------------------
          Mortgagee is complying with subsection 4.7.1, upon the acquisition of
          Developer's Leasehold Estate herein by such Leasehold Mortgagee or its
          designee or any other purchaser at a foreclosure sale or otherwise
          this Lease shall continue in full force and effect as if Developer had
          not defaulted under this Lease.

                        4.7.4  Leasehold Mortgage Not an Assignment. For the
                               ------------------------------------
          purposes of this Section 4, the making of a Leasehold Mortgage issued
          by an institutional lender shall not be deemed to constitute an
          assignment or transfer of this Lease or of the Leasehold Estate hereby
          created, nor shall any Leasehold Mortgagee, as such, be deemed to be
          an assignee or transferee of this Lease or of the Leasehold Estate
          hereby created so as to require such Leasehold Mortgagee, as such, to
          assume the performance of any of the terms, covenants or conditions on
          the part of Developer to be performed hereunder, but the purchaser at
          any sale of this Lease and of the Leasehold Estate hereby created in
          any proceedings for the foreclosure of any Leasehold Mortgage, or the
          assignee or transferee of this Lease and of the Leasehold Estate
          hereby created under any instrument of assignment or transfer

                                      26
<PAGE>
 
          in lieu of the foreclosure of any Leasehold Mortgage shall be deemed
          to be an assignee or transferee within the meaning of this Section 4,
          and shall be deemed to have agreed to perform all of the terms,
          covenants and conditions on the part of Developer to be performed
          hereunder from and after the date of such purchase and assignment, but
          only for so long as such purchaser or assignee is the owner of the
          Leasehold Estate. Provided, however, that Developer shall, as to such
          Leasehold Mortgagee, provide to Landlord the same information which
          Developer must supply pursuant to this Lease as assignee.

              4.7.5  Obligation of Leasehold Mortgagee to Repair or Reconstruct.
                     ----------------------------------------------------------
          If the Leasehold Mortgagee or its designee shall become holder of the
          Leasehold Estate, and if the buildings and improvements on the
          Premises shall have been or become materially damaged on, before or
          after the date of such purchase and assignment, the Leasehold
          Mortgagee or its designee shall be obligated to repair, replace or
          reconstruct the building or other improvements only to the extent of
          the net insurance proceeds received by the Leasehold Mortgagee or its
          designee by reason of such damage. However, should such net insurance
          proceeds be insufficient to repair, replace or reconstruct the
          building or other improvements to the extent required by subsection
          6.3, and should the Leasehold Mortgagee or its designee choose not to
          fully reconstruct the

                                      27
<PAGE>
 
          building or other improvements to the extent required by subsection
          6.3, such failure shall constitute an event of default under this
          Lease which shall entitle Landlord to commence proceedings to
          terminate the Lease.

              4.7.6  Leasehold Mortgagee's Right to Transfer. Any Leasehold
                     ---------------------------------------
          Mortgagee or other acquirer of the Leasehold Estate of Developer
          pursuant to foreclosure, assignment in lieu of foreclosure or other
          proceedings may, upon acquiring Developer's Leasehold Estate, without
          further consent of Landlord, assign the Leasehold Estate one time on
          such terms and to such persons and organizations as are acceptable to
          such Mortgagee or acquirer and thereafter be relieved of all
          obligations under this Lease; provided that such assignee has
          delivered to Landlord its written agreement to be bound by all of the
          provisions of this Lease. Any further attempts by the Leasehold
          Mortgagee to assign shall comply with the provisions of this Lease
          relating to Assignment.

              4.7.7  Leasehold Mortgagee Transfer a Permitted Sale.
                     ---------------------------------------------
          Notwithstanding any other provisions of this Lease, any sale of this
          Lease and of the Leasehold Estate hereby created in any proceedings
          for the foreclosure of any Leasehold Mortgage, or the assignment or
          transfer of this Lease and of the Leasehold Estate hereby created in
          lieu of the foreclosure of any Leasehold Mortgage shall be deemed to

                                      28
<PAGE>
 
          be a permitted sale, transfer or assignment of this Lease and of the
          Leasehold Estate hereby created.

            4.8  New Lease.
                 ---------
                 4.8.1  Terms of New Lease. In the event of the termination of
                        ------------------
          this Lease as a result of Developer's default Landlord shall, in
          addition to providing the notices of default and termination as
          required by subsections 4.5 and 4.6, provide each Leasehold Mortgagee
          with written notice that the Lease has been terminated, together with
          a statement of all sums which would at that time be due under this
          Lease but for such termination, and of all other defaults, if any,
          then known to Landlord. Landlord agrees to enter into a new lease
          ("New Lease") of the Premises with such Leasehold Mortgagee, or its
          designee for the remainder of the term of this Lease, effective as of
          the date of termination, at the Ground Rent and additional rent, and
          upon the terms, covenants and conditions, including all first rights
          of refusal and options to renew or purchase, but excluding
          requirements which are not applicable or which have already been
          fulfilled of this Lease, provided:

                        4.8.1.1  Written Request to Landlord. Such Leasehold
                                 ---------------------------
              Mortgagee shall make written request upon Landlord for such New
              Lease within thirty (30) days after the date such Leasehold
              Mortgagee receives Landlord's Notice of Termination of this Lease
              given pursuant to this subsection 4.8.

                        4.8.1.2  Payment of Obligations.  Such
                                 ----------------------

                                      29
<PAGE>
 
              Leasehold Mortgagee or its designee shall pay or cause to be paid
              to Landlord at the time of execution and delivery of such New
              Lease, any and all sums which would at the time of execution and
              delivery thereof be due pursuant to this Lease but for such
              termination and, in addition thereto, all reasonable expenses,
              including reasonable attorney's fees, which Landlord shall have
              incurred by reason of such termination and the execution and
              delivery of the New Lease and which would not otherwise have been
              received by Landlord from Developer or other party in interest
              under Developer. In the event of a controversy as to the amount to
              be paid to Landlord pursuant to this subsection 4.8.1.2, the
              payment obligation shall be satisfied if Landlord shall be paid
              the amount not in controversy, and the Leasehold Mortgagee or its
              designee shall agree to pay any additional sum ultimately
              determined to be due plus interest at the rate set forth in
              subsection 3.1.6, and such obligation shall be adequately secured.

                        4.8.1.3  Remedy of Developer's Defaults. Such Leasehold
                                 ------------------------------
              Mortgagee or its designee shall agree to remedy any of Developer's
              defaults of which said Leasehold Mortgagee is or may be notified
              by Landlord's Notice of Termination and which are reasonably
              susceptible of being so cured by Leasehold Mortgagee or its
              designee.

                                      30
<PAGE>
 
                        4.8.1.4  New Lease to Have First Priority. Any New Lease
                                 --------------------------------
              made pursuant to this subsection 4.8 and any Subdivided Lease
              entered into pursuant to subsection 7.6 and any Single Lease
              entered into pursuant to subsection 7.7, shall be prior to any
              mortgage or other lien, charge or encumbrance on the fee of the
              Premises and the Developer under such New Lease, Single Lease or
              Subdivided Lease, as the case may be, shall have the same right,
              title and interest in and to the Premises and the buildings and
              improvements thereon as Developer had under this Lease.

                        4.8.1.5  Developer's Obligations Under New Lease.  The
                                 ---------------------------------------
              Developer under any such New Lease, Single Lease or Subdivided
              Lease shall be liable to perform the obligations imposed on the
              Developer by such New Lease, Single Lease or Subdivided Lease only
              during the period such person or entity has ownership of such
              Leasehold Estate.

              4.9  New Lease Priorities.  If more than one Leasehold Mortgagee
                   --------------------
shall request a New Lease pursuant to subsection 4.8.1, Landlord shall enter
into such New Lease with the Leasehold Mortgagee whose mortgage is prior in lien
or with the designee of such Leasehold Mortgagee. Landlord, without liability to
Developer or any Leasehold Mortgagee with an adverse claim, may rely upon a
mortgagee title insurance policy issued by a responsible title insurance company
doing business within the State of California as the basis for determining the
appropriate Leasehold Mortgagee

                                       31
<PAGE>
 
who is entitled to such New Lease.

              4.10  Eminent Domain.  Developer's share, as provided by
                    --------------
subsection 10.3, of the proceeds arising from an exercise of the power of
Eminent Domain shall, subject to the provisions of such subsection 10.3, be
disposed of as provided for by any Leasehold Mortgagee.

              4.11  Notice of Arbitration.  Landlord shall give each Leasehold
                    ---------------------
Mortgagee prompt notice of any appraisal, arbitration or legal proceedings
between Landlord and Developer involving obligations under this Lease.  Landlord
shall give the Leasehold Mortgagee notice of, and a copy of any award or
decision made in any such proceedings, which shall be binding on all Leasehold
Mortgagees.

              4.12  Amendment to Facilitate Leasehold Financing. Landlord hereby
                    -------------------------------------------
agrees that if any Institutional Lender to whom Developer proposes to make a
Leasehold Mortgage on Developer's Leasehold Estate shall require as a condition
to making any loan secured by such mortgage that Landlord agree to modifications
of this Lease, then Landlord agrees that it will enter into an agreement with
Developer in recordable form making the modifications that are requested by such
lender, provided that such changes do not adversely affect any right of Landlord
under this Lease.

              4.13  Security Deposit.  If any Leasehold Mortgagee, its designee
                    ----------------
or other purchaser has acquired the Leasehold Estate of Developer pursuant to
foreclosure, conveyance in lieu of foreclosure or other proceedings, or has
entered into a New Lease with Landlord in accordance with subsection 4.8, such
Leasehold

                                       32
<PAGE>
 
Mortgagee, its designee or other purchaser shall succeed to the rights of
Developer, if any, in and to the security deposits paid by Developer to Landlord
pursuant to subsections 16.1 and 16.2. In such event, Developer shall no longer
have any rights to such security deposits, and Landlord shall hold such security
deposits for and on behalf of such Leasehold Mortgagee, its designee or other
purchaser.

              4.14  Estoppel Certificate.  Landlord shall at any time and from
                    --------------------
time to time hereafter, but not more frequently than twice in any one-year
period (or more frequently if such request is made in connection with any sale
or mortgaging of Developer's Leasehold Interest or permitted subletting by
Developer), within ten (10) days after written request of Developer to do so,
certify by written instrument duly executed and acknowledged to any Mortgagee or
purchaser, or proposed Mortgagee or proposed purchaser, or any other person,
firm or corporation specified in such request: (i) as to whether this Lease has
been supplemented or amended, and if so, the substance and manner of such
supplement or amendment; (ii) as to the validity and force and effect of this
Lease, in accordance with its tenor; (iii) as to the existence of any default
hereunder; (iv) as to the existence of any offsets, counter claims or defenses
hereto on the part of Developer; (v) as to the commencement and expiration dates
of the term of this Lease; and (vi) as to any other matters as may be reasonably
so requested. Any such certificate may be relied upon by Developer and any other
person, firm or corporation to whom the same may be exhibited or delivered, and
the contents of such certificate shall be binding on Landlord.

                                       33
<PAGE>
 
Any party requesting such estoppel certificate shall reimburse Landlord for its
costs and expenses incurred in issuing such certificate.

          4.15  Notices.  Notices from Landlord to the Leasehold Mortgagee shall
                -------
be mailed to the address furnished Landlord pursuant to subsection 4.2 , and
those from the Leasehold Mortgagee to Landlord shall be mailed to the address
designated pursuant to the provisions of subsection 1.5.1 hereof, attention the
General Manager.  Such notices, demands and requests shall be given in the
manner described in subsection 17.1 and shall in all respects be governed by the
provisions of that subsection.

          4.16  Erroneous Payments.  No payment made to Landlord by a Leasehold
                ------------------
Mortgagee shall constitute agreement that such payment was, in fact, due under
the terms of this Lease; and a Leasehold Mortgagee having made any payment to
Landlord pursuant to Landlord's wrongful, improper or mistaken notice or demand
shall be entitled to the return of any such payment or portion thereof provided
such Leasehold Mortgagee shall have made demand therefor not later than ninety
(90) days after the date of its payment.

          4.17  Request for Notice for Benefit of Landlord.  Immediately after
                ------------------------------------------
recording any Leasehold Mortgage encumbering Developer's Leasehold Estate,
Developer, at Developer's expense, shall cause to be recorded in the Office of
the Recorder of Los Angeles County, California, a written request of notice
under Section 2924(b) of the California Civil Code providing that a copy of any
notice of default and a copy of any notice of sale under such Leasehold Mortgage
shall be delivered to Landlord as
                                       34
<PAGE>
 
provided for under said Section 2924(b) of the California Civil Code.  Such
request shall be executed by Landlord.  Concurrently, with Developer's
forwarding such notice for recordation, Developer shall furnish to Landlord a
complete copy of the Leasehold Mortgage and the note secured thereby, together
with the name and address of the holder thereof.  Said note and mortgage are to
be kept by Landlord on a confidential basis to the extent permitted by law.

          4.18  Release or Forebearance.  If any such lender shall fail or
                -----------------------
refuse to comply with any and all of the conditions of this section, then and
thereupon Landlord shall be released from its covenant of forebearance with such
lender herein contained.

          4.19  Notice.  Landlord's obligation to observe its covenants of
                ------
forebearance in this section for the benefit of any lender on the security of
the Leasehold Estate, except as may be otherwise provided by law, shall be
conditioned upon there having been first delivered to the Airport Manager of the
City of Long Beach, a written notice of such encumbrance which shall state the
name and address of such lender for the purpose of enabling notices to be given
under subsection 4.2 above.

          4.20  No Merger.  No merger of Developer's Leasehold Estate into
                ---------
Landlord's fee title shall result by reason of the ownership of Landlord's or
Developer's estates by the same party or by reason of any other circumstances,
without the prior consent of any and all lenders on the security of the
Leasehold Estate.

          4.21  No Payment by Landlord.  Landlord shall not be required to 
                ----------------------
execute any instrument which would obligate Land-

                                      35
<PAGE>
 
lord to the payment of any loan or any part thereof.

          4.22  Self Liquidating Mortgage.  The Leasehold Mortgage shall be a
                -------------------------
self liquidating mortgage, to be paid over a period not longer than elapses up
to three (3) years prior to the end of the term of this Lease, or any option
term if such option has been exercised.

          4.23  Leasehold Mortgagee Need Not Cure Specified Defaults.  Nothing
                ----------------------------------------------------
herein contained shall require any Leasehold Mortgagee or its designee as a
condition to its exercise of right hereunder to cure any default of Developer
which cannot be cured by such Leasehold Mortgagee or its designee, in order to
comply with the provisions of subsections 4.6 or 4.7 or as a condition of
entering into the New Lease provided for by subsection 4.8.

          4.24  Casualty Loss.  A Standard Mortgagee Clause naming each
                -------------
Leasehold Mortgagee may be added to any and all insurance policies required to
be carried by Developer hereunder on condition that the insurance proceeds are
to be applied in the manner specified in this Lease and the Leasehold Mortgage
shall so provide, except that the Leasehold Mortgage may provide a manner for
the disposition of such proceeds, if any, otherwise payable directly to
Developer.


          5.  ASSIGNMENT AND SUBLETTING:
              -------------------------

          5.1 Prohibition Against Change in Ownership, Management and
              -------------------------------------------------------
Control.  The qualifications and identities of Developer are of particular
- -------
concern to Landlord. It is because of those qualifications and identities that
Landlord has entered into this Lease with Developer. No voluntary or involuntary

                                       36
<PAGE>
 
successor in interest shall acquire any rights or powers under this Lease except
as expressly provided for in this Lease.

          Except as otherwise permitted by this Section 5 and subsection 1.5.3,
Developer shall not permit any significant change (voluntary or involuntary) in
the ownership, management or control of Developer to occur unless such change is
approved by Landlord, subject to the requirements of this section and reasonable
conditions imposed by Landlord.

          Except as otherwise permitted by this Section 5 and subsection 1.5.3,
Developer may not assign this Lease or any interest herein without first
obtaining the written consent of Landlord, pursuant to subsection 5.4 of this
Lease.  Any assignee shall assume and agree to perform the obligations of
Developer under this Lease.  Promptly following any permitted assignment,
Developer shall deliver to Landlord a copy of such assignment, together with a
statement setting forth the following information:

                   5.1.1  Name and Address for Notices.  The name and address of
                          ----------------------------
          the assignee for the purpose of enabling notices to be given.

                   5.1.2  Type of Entity.  Whether the assignee is an
                          --------------
          individual, a corporation, a partnership or a joint venture, and if
          such assignee is a corporation, the names of such corporation's
          principal officers and of its directors and State of incorporation,
          and if such assignee is a partnership or joint venture, the names and
          addresses of the general partners of such partnership or venture.

                   5.1.3  Other Transfers.  In the event that
                          ---------------

                                       37
<PAGE>
 
          Developer is a partnership, joint venture or corporation, any
          assignment of twenty-five percent (25%) or more of the partnership or
          joint venture interest or outstanding capital stock of such an entity
          shall constitute an assignment by Developer of this Lease for the
          purposes of this Section 5 and shall not be permitted to occur without
          first obtaining the written consent of Landlord, which consent shall
          not unreasonably be withheld, delayed or conditioned.

                   5.1.4  Buildings or Land.  In addition to all other
                          -----------------
          assignments, which must be approved in advance by Landlord, any
          assignment of 50,000 square feet of land or office space must be
          approved in advance by Landlord.

          5.2  Assignments Not Subject to Approval.  The provisions of this
               -----------------------------------
Section 5 shall not be applicable to the following types of assignments and
transfers, which shall be permitted without the prior consent of Landlord.

                   5.2.1  Death or Incapacity.  Assignments resulting from the
                          -------------------
          death or mental or physical incapacity of an individual, provided,
          however, that any person replacing an individual who departs because
          of physical or mental disability shall have education and experience
          comparable to that of the person replaced.

                   5.2.2  Family Transfer.  A transfer or assignment for the
                          ---------------
          benefit of a spouse, children, grandchildren or other family members.

                   5.2.3  Affiliated Corporation.  A transfer to an "Affiliated
                          ----------------------
          Corporation" as hereinafter defined.  An

                                       38
<PAGE>
 
          "Affiliated Corporation" shall be (i) any corporation which owns 
          fifty-one percent (51%) or more of the outstanding capital stock of
          the assigning corporation; or (ii) any corporation, fifty-one percent
          (51%) or more of the outstanding capital stock of which is owned by
          the assigning corporation; or (iii) any corporation, fifty-one percent
          (51%) or more of the outstanding capital stock of which is owned by a
          shareholder or group of shareholders who also owns at least fifty-one
          percent (51%) of the outstanding capital stock of the assigning
          corporation.

                    5.2.4  IRS Transfer.  A transfer of stock resulting from 
                           ------------
          or in connection with a reorganization as contemplated by the
          provisions of the Internal Revenue Code of 1954, as amended, or
          otherwise, in which the ownership interests of a corporation are
          assigned directly or by operation of law to a person or persons, firm
          or corporation which acquires the control of the voting capital stock
          of such corporation or all or substantially all of the assets of such
          corporation.

                    5.2.5  Public Entity.  A transfer of stock in a publicly 
                           -------------
          held corporation or of the beneficial interest in any publicly held
          partnership or real estate investment trust.

                    5.2.6  Partner.  A transfer by a limited partner or joint
                           -------
          venturer to a partnership or joint venture in which the assignor is a
          partner or venturer.
 
                                      39
<PAGE>
 
                    5.2.7  Comprising Entity.  A transfer or assignment from one
                           -----------------
          partner or joint venturer comprising Developer to another; or if
          Developer is a corporation, from one shareholder to another.

               5.3  Assignment Invalid.  Any transfer or assignment to which
                    ------------------
Landlord's consent is required by subsection 5.1 shall be void and shall confer
no right to occupancy upon the assignee unless and until such consent of
Landlord is obtained.  Such approval may be conditioned or refused in response
to the matters specified herein.

               5.4  Approval of Assignments.  Landlord agrees that it shall 
                    -----------------------
consent to an assignment to a subtenant and to an assignee which, at the time of
such assignment, is of such financial standing and responsibility as to give
reasonable assurance that the payment of all Ground Rent and other amounts
reserved in this Lease will be made in compliance with all the terms, covenants,
provisions and conditions of this Lease. In requesting an approval by Landlord
of assignment pursuant to subsection 5.1, Developer shall provide the following
information to Landlord with respect to proposed assignments of 50,000 square
feet of rentable building area or land area, or more, of sublease space, with
respect to any Ground Sublease and with respect to assignments of a parcel or an
interest in this Ground Lease.

                    5.4.1  Name.  Name and address of the assignee.
                           ----

                    5.4.2  Description.  Description of the Premises to be
                           -----------
          assigned.

                    5.4.3  Nature of Business.  The nature of the business
                           ------------------
          conducted by assignee on the Premises to be 

                                      40
<PAGE>
 
          assigned.

                    5.4.4  Financial Information.  Financial strength of the
                           ---------------------
          subtenant or assignee (if the subtenant is a publicly held company, a
          copy of its most recent annual report; if the subtenant or assignee
          will not disclose financial information, a report from recognized
          credit rating agency, such as Dun & Bradstreet).

                    5.4.5  Officers.  The identity, background and experience of
                           --------
          all officers and directors of assignee, at executive vice president
          level and above and senior operational officer relating to the
          Premises, if a corporation or general partners of a partnership or
          sole proprietor of a proprietorship (Principals).

                    5.4.6  Additional Information.  To the extent known by
                           ----------------------
          Developer, the following information:

                         5.4.6.1  Criminal record of the subtenant, assignee or
               any of the Principals.

                         5.4.6.2  Nature and extent of litigation to which the
               subtenant, assignee or any Principal is a party.

                         5.4.6.3  Any course of conduct which a prudent person
               would deem materially detrimental to the Project or to the
               intended use of the Premises by the subtenant or assignee.

                    5.4.7  Informational Purposes.  For informational purposes
                           ----------------------
                    only:
                    
                         5.4.7.1  Number of anticipated employees of the
               assignee.

                                      41
<PAGE>
 
                        5.4.7.2  At the time of submission of the request, the
              terms and conditions of the assignment.

                        5.4.7.3  With respect to all assignments a copy thereof
              after execution by all parties thereto.

                   5.4.8  Confidentiality.  If requested by Developer at the 
                          ---------------
          time of submission of the information described above, Landlord shall
          keep such information and the identity of the proposed sublessee
          or assignee confidential and Landlord shall execute a
          confidentiality statement so providing to the extent Landlord is
          permitted by law to do so.

                   5.4.9  Disapproval by Landlord.  Landlord reserves the right
                          -----------------------
          to reject any proposed assignee where the matters specified in 5.4.3,
          5.4.4, 5.4.5 or 5.4.6 above indicate that the presence of assignee
          would not be in the public interest or would adversely affect the
          financial viability of the Project. Landlord shall either approve or
          disapprove any proposed assignee within fifteen (15) days after
          receipt by Landlord of a request to do so. Failure of Landlord to act
          within said fifteen (15) days shall constitute approval. If Landlord
          does not approve any proposed assignee, Landlord shall state in
          writing the reasons for such disapproval. Developer shall have the
          right to challenge the validity of such disapproval. No damages shall
          be payable to Developer in any action arising from such disapproval
          unless Landlord shall have acted unreasonably or in bad faith or with
          actual malice.

                                      42
<PAGE>
 
          5.5  No Release.  Notwithstanding any assignment by Developer 
               ----------
permitted by subsection 5.1 with Landlord's consent, and notwithstanding any
assignment by a partner or joint venturer of Developer permitted by subsection
5.1.3 with Landlord's consent or made without Landlord's consent pursuant to
subsection 5.2, the assigning party shall remain fully liable for the
performance of all of the covenants to be performed by Developer under this
Lease prior to the effective date of such assignment or the "Completion Date",
as defined below, whichever last occurs, but shall be released from liability
with respect to the performance of such covenants to be performed after the last
to occur of such dates, Landlord's approval of or consent to any such assignment
or transfer shall not be a waiver of any right to object to further or future
assignments, and Landlord's consent to each such successive assignment must be
first obtained in writing from Landlord unless otherwise permitted by this Lease
without Landlord's prior consent. The term "Completion Date", as used herein,
shall mean the date that Developer completes the construction of the initial
building described in subsection 7.2 and a certificate of occupancy with respect
to such building has been obtained.

          5.6  Unauthorized Change.  This Lease may be terminated by the 
               -------------------
Landlord if there is any significant change (voluntary or involuntary) other
than those authorized in Section 5 or subsection 1.5.3 hereof, or not requiring
Landlord's approval of ownership, management or control of the Developer prior
to the completion of the development of the site, unless such changes have been
approved by the Landlord.

                                      43
<PAGE>
 
          5.7  Subletting.  Developer shall be entitled, with the prior written
               ----------
consent of Landlord, to sublet the whole or any portion of the Premises or the
improvements constructed thereon by or under Developer and, without limiting the
foregoing, may establish a leasehold condominium regime on the Premises, or
portions thereof, in accordance with the provisions of California law, including
California Civil Code Sections 783 and 1350-1360. Developer shall, at all times,
remain liable for the performance of all of the covenants on its part to be so
performed, notwithstanding any subletting. Each sublease shall be subject and
subordinate not only to this Lease, but also to any New Lease made by Landlord
as provided in Section 4.8 above. If the term of this Lease shall end while any
such sublease is in effect, Landlord may, at its option, for a period of ninety
(90) days thereafter, either terminate the said sublease or succeed to all of
the rights of Developer thereunder. Where any sublease which is consistent with
this Lease is approved, Landlord may grant to the subtenant, under such an
approved sublease entered into in good faith and for reasonable consideration, a
right of quiet enjoyment in recordable from (a "nondisturbance agreement")
during the term of the sublease, notwithstanding the expiration, termination or
cancellation of this Lease; provided that (i) the term of the sublease, plus
extension or renewal options, does not extend beyond the term of this Lease,
plus extension options; (ii) such subtenant agrees that in the event this Lease
expires, terminates or is cancelled during the term of the sublease, the
sublease shall be deemed a direct lease between Landlord and such subtenant and
the subtenant shall attorn to Landlord. In the

                                      44
<PAGE>
 
event that Landlord objects to any proposed nondisturbance agreement or
sublease, Landlord agrees to notify Developer in writing of such objection and
of its reasons for such objection within twenty (20) days of its receipt of the
proposed nondisturbance agreement and sublease. Subject to the foregoing
provisions of this subsection 5.7, Landlord hereby approves generally of the
form of nondisturbance agreement attached hereto as Exhibit "E". Any approvals
or grants of quiet enjoyment given or made by Landlord pursuant to this
subsection 5.7 shall be binding upon Landlord, its successors or assigns,
including without limitation any person or entity succeeding to the interest of
Landlord by way of judicial foreclosure or trustee sale proceedings pursuant to
any mortgage or deed of trust, the lien or charge of which is subject and
subordinate to this Lease.

          Any sublease, with respect to which Landlord agrees to execute a
nondisturbance agreement pursuant to this subsection 5.7, may be a sublease
pursuant to which the subtenant is responsible for the construction of the
building improvements upon the subleased premises (a "Ground Sublease" herein).
Any Ground Sublease may contain a hypothecation provision similar to Section 4
of this Lease for the benefit of the holder of any mortgage or deed of trust
constituting a lien on the subleasehold estate created by virtue of the Ground
Sublease. Any nondisturbance agreement executed and delivered by Landlord for
the benefit of the sublessee under a Ground Sublease shall specifically recite
that it is for the benefit of any such holder of a deed of trust or mortgage
constituting a lien on the subleasehold estate created by such Ground Sublease;
that the term "sublease" as used in

                                      45
<PAGE>
 
the nondisturbance agreement shall be deemed to include any new sublease
executed and delivered to any such holder of a first deed of trust or first
mortgage following a termination of the sublease pursuant to a provision in the
sublease similar to subsection 4.8 of this Lease, and that the term "sublessee"
under the nondisturbance agreement shall be deemed to include any encumbrancer
or other party succeeding to the sublessee under the Ground Sublease by virtue
of judicial or private power of sale foreclosure proceedings or by delivery of
an assignment in lieu of  foreclosure, or otherwise.  Where Landlord agrees to
execute a nondisturbance agreement for the benefit of the sublessee under any
Ground Sublease, such agreement shall be subject to the obligations of the
sublessee thereunder being no less than the obligations of the Developer
hereunder with respect to the subleased premises.

                   5.7.1  Minor Subleases.  Consent of Landlord shall not be
                          ---------------
           required to a sublease of any unit of space smaller than 50,000
           square feet, not including parking areas; however, notice of any such
           sublease shall be sent to Landlord's Airport Manager within ten (10)
           days of the execution of the sublease.

                   5.7.2  Consent to Sublease.  Prior to review of any proposed
                          -------------------
           sublease, the following information and assurances shall be provided
           to Landlord as part of the request for consent to proposed subleases
           of 50,000 square feet of rentable building area, or more, of sublease
           space, with respect to any Ground Sublease:

                        5.7.2.1  Description.  Description of
                                 -----------
                                      46
<PAGE>
 
               the sublease Premises.

                        5.7.2.2  Name.  The name and address of the sublessee 
                                 ----
               for the purpose of enabling notices to be given under subsection
               17.1 hereof.

                        5.7.2.3  Nature of Business.  The nature of the business
                                 ------------------
               conducted on the sublease Premises.

                        5.7.2.4  Financial Information.  Financial strength of 
                                 ---------------------
               the subtenant or assignee (if the subtenant is a publicly held
               company, a copy of its most recent annual report; if the
               subtenant or assignee will not disclose financial information a
               report from a recognized credit rating agency, such as Dun &
               Bradstreet).

                        5.7.2.5  Officers.  The identity, background and 
                                 --------
               experience of all officers and directors of sublessee, at
               executive vice president level and above and senior operational
               office relating to the Premises, if sublessee is a corporation,
               general partners of a partnership or sole proprietor of a
               proprietorship (Principals).

                        5.7.2.6  Additional Information.  To the extent known by
                           ----------------------
               Developer, the following information:

                            5.7.2.6.1  Criminal record of the subtenant, 
                    assignee or any of the Principals.

                            5.7.2.6.2  Nature and extent of litigation to which
                    the subtenant, assignee or any Principal is a party.

                                      47
<PAGE>
 
                            5.7.2.6.3  Any course of conduct which a prudent
                        person would deem materially detrimental to the Project
                        or to the intended use of the Premises by the subtenant
                        or assignee.

                        5.7.2.7  Information Purposes. For informational 
                                 --------------------
                        purposes only:    

                            5.7.2.7.1  Number of anticipated employees of the
                        subtenant or assignee.

                            5.7.2.7.2  At the time of submission of the request,
                        the terms and conditions of the sublease or assignment.

                            5.7.2.7.3  With respect to all subleases and 
                        assignments a copy thereof after execution by all
                        parties thereto.

                            5.7.2.7.4 Any proposed nondisturbance or attornment
                        agreements.

                        5.7.3  Confidentiality.  If requested by Developer at 
                               ---------------
                  the time of submission of the information described above,
                  Landlord shall keep such information and the identity of the
                  proposed sublessee or assignee confidential and Landlord shall
                  execute a confidentiality statement so providing, to the
                  extent Landlord is permitted by law to do so.

                        5.7.4  Disapproval by Landlord.  Landlord reserves the
                               -----------------------
                  right to reject any proposed sublessee where the matters
                  specified in 5.7.2.3, 5.7.2.4, 5.7.2.5 or 5.7.2.6 above
                  indicate that the presence of sublessee would not be in the
                  public interest or would adversely

                                      48
<PAGE>
 
          affect the financial viability of the Project.  Landlord shall either
          approve or disapprove any proposed sublessee within fifteen (15) days
          after receipt by Landlord of a request to do so.  Failure of Landlord
          to act within said fifteen (15) days shall constitute approval.  If
          Landlord does not approve any proposed sublessee, it shall state in
          writing the reasons for such disapproval.  Developer shall have the
          right to contest such disapproval.  No damages shall be payable to
          Developer in any action challenging such disapproval unless Landlord
          shall have acted unreasonably, in bad faith or with actual malice.

              5.8  Sale of Buildings.  Developer shall have the right to sell
                   -----------------
buildings constructed pursuant to the terms of this Lease, provided, however,
that such buildings shall be and remain subject to the terms and conditions of
this Lease.  No sale of such buildings shall be valid unless this requirement is
expressly included in the deed as a covenant running with the land.


          6.  INDEMNITY, INSURANCE, CASUALTY DAMAGE:
              --------------------------------------

              6.1  Indemnification and Hold Harmless.  Developer expressly 
                   ---------------------------------                 
agrees to defend, protect, indemnify and hold harmless the Landlord, its
officers, agents and employees free and harmless from and against any and all
claims, demands, damages, expenses, losses or liability of any kind or nature
whatsoever which Landlord, its officers, agents or employees may sustain or
incur or which may be imposed upon them or any of them for injury to or death of
persons or damage to property arising out of or

                                      49
<PAGE>
 
resulting from the alleged acts or omissions of Developer, its officers, agents
or employees or in any manner connected with this Lease or with the occupancy,
use or misuse of the Premises by Developer, its officers, agents, employees,
subtenants, licensees, patrons or visitors.  Developer also agrees to defend at
its own cost, expense and risk all claims or legal actions that may be
instituted against Developer or Landlord with respect to the Premises, and the
design and construction of off-site improvements except traffic signals, and
Developer agrees to pay settlements and to satisfy any judgment that may be
rendered against either Developer or Landlord as a result of any injuries or
damages which are alleged to have resulted from or be connected with this Lease
or the occupancy or use of the Premises by Developer or its officers, agents,
employees, subtenants, licensees, patrons or visitors.  Nothing herein shall be
deemed to require Developer to indemnify Landlord for liability determined by a
court of law to have arisen from negligence of Landlord, provided, however, that
as between the parties to this Lease, in any matter in which the doctrine of
joint and several liability applies, Landlord shall not be required to pay any
larger share of such judgment than its actual contribution as determined by the
Court.

              6.2  Insurance.
                   ----------

                   6.2.1  Liability Insurance.  At all times during the term of
                          -------------------
          this Lease, Developer shall obtain and maintain or cause to be
          obtained and maintained bodily injury and property damage insurance by
          a combined single limit policy in an amount of at least Ten Million
          Dollars and No/l00 ($10,000,000.00) naming the

                                      50
<PAGE>
 
          Landlord and its officers, agents and employees as co-insureds with
          Developer and others designated by Developer. Developer shall also
          maintain workers' compensation insurance in the amount required by
          statute.

                    Prior to entry upon the Premises, and upon each insurance
          renewal, Developer shall deliver the policies of insurance required
          by this subsection 6.2, or certified photostatic copies thereof, to
          the City of Long Beach Airport Manager for approval as to sufficiency
          and for approval as to form by the City Attorney. When said policies
          of insurance have been so approved, Developer shall substitute a
          certificate of insurance issued by the insurance company or companies
          issuing such policies certifying that said insurance coverage is in
          full force and effect and upon the filing of said certificate, the
          policies will be returned by Landlord to Developer, if Developer has
          deposited the original policies with Landlord. Said liability and
          property damage insurance policy shall contain a provision or
          endorsement substantially as follows:

               "The inclusion hereof of any person or entity as an insured shall
               not affect any right such person or entity would have as a
               claimant hereunder if not so included. This insurance shall be
               primary and not contributing with any other insurance maintained
               by Landlord."

                    Notwithstanding any other provision to the contrary
          contained in this Lease, Developer shall not

                                      51
<PAGE>
 
          have the right to enter upon the Premises for any purpose whatsoever
          until such certificate has been filed with Landlord.

                    6.2.2  Fire and Extended Coverage.  Developer shall, at no
                           --------------------------
          cost or expense to Landlord, keep insured for the benefit of Developer
          and Landlord, and such other parties, having an insurable interest, as
          Developer may designate, the improvements constructed by or under
          Developer upon the Premises against loss or damage by fire and
          lightning and risks customarily covered by extended coverage
          endorsement, in amounts not less than one hundred percent (100%) of
          the actual replacement cost of said improvements, except that
          Developer, at Developer's option may exclude the cost of excavations,
          foundations and footings. Landlord shall be named as an insured under
          any such policy. Such fire and extended coverages shall also be
          required to be furnished by Developer during the construction of
          improvements on the Premises as contemplated by Section 7 below. Any
          loss payable under such insurance shall be payable to Developer,
          Landlord and such other parties having an insurable interest in the
          property as Developer may designate and may be endorsed with a
          standard mortgagee's loss payable endorsement in favor of the holder
          of any Leasehold Mortgagee holding a Leasehold Mortgage. Landlord will
          release the entire sum of the proceeds to Developer or to a lender for
          purposes of reconstruction, replacement or repair of any damaged
          improvement.

                                      52
<PAGE>
 
          The proceeds of such insurance shall be paid to Developer to the
          extent the amount of the recovery is for damages to interior, non-
          structural or subtenant improvements, equipment, fixtures, personal
          property or for rental value insurance to the extent such recoveries
          are separate identifiable items. If Developer shall within five (5)
          years after such damage or destruction commence construction of the
          damaged or destroyed building, or a new building in accordance with
          Section 7 hereof, the proceeds of any insurance payable by reason of
          such damage or destruction shall be paid to Developer. If Developer
          shall fail to commence such construction within such five (5) year
          period Landlord reserves the right to receive such portion of the
          insurance proceeds so that Landlord may, if appropriate, carry out
          such reconstruction of the destroyed building; with all excess amounts
          to Developer. If at any time during the last five (5) years of the
          term of the Lease whether the original term or any extension thereof,
          a building then on the Premises shall be so damaged by fire or other
          casualty that the cost of restoration shall exceed fifty percent (50%)
          of the replacement value thereof, exclusive of foundations,
          immediately prior to such damage, either party hereto may, within
          sixty (60) days of such damage, give notice of its election to
          terminate this Lease with respect to the parcel upon which the
          building is located and, subject to further provisions of this
          subsection this

                                      53
<PAGE>
 
          Lease shall cease and come to an end on the date of the expiration of
          ten (10) days from the delivery of such notice with the same force and
          effect as if such date were the date herein fixed for the expiration
          of the term hereof, and the Ground Rent shall be apportioned and paid
          to the date of such termination. In such event Developer shall remove
          all debris and level the land, and Developer shall have no obligation
          to repair or rebuild or restore. The insurance proceeds shall then be
          divided as follows:

                    If five (5) years remain before the end of the Lease or any
          extension thereof, Developer shall receive seventy-five percent (75%)
          of the proceeds, and Landlord shall receive twenty-five percent (25%);
          if four (4) years remain before the end of the Lease, Developer shall
          receive fifty percent (50%) of the proceeds, and Landlord shall
          receive fifty percent (50%); if three (3) years remain before the end
          of the Lease, Developer shall receive twenty-five percent (25%) of the
          proceeds, and Landlord shall receive seventy-five percent (75%); if
          two (2) years remain before the end of the Lease, Developer shall
          receive ten percent (10%) of the proceeds, and Landlord shall receive
          ninety percent (90%); if one (1) year remains before the end of the
          Lease, Landlord shall receive the entire proceeds.

                    6.2.3  Aviation Facilities.  Insurance for any aviation
                           -------------------
          facility developed pursuant to this Lease shall include all of the
          types and amounts specified

                                      54
<PAGE>
 
          herein to the extent such coverages are applicable to operations
          performed. Depending upon the nature of the physical improvements made
          upon and the use of the Premises, aviation insurance coverages shall
          be maintained, to the extent such coverages are applicable, as
          follows: Hangar Liability, Hangar Keeper's Legal Liability; Airport
          Legal Liability, Hangar Material Damage Coverage. To the extent any of
          the above liability coverages are required, said policies shall be
          maintained with a combined single limit in the amount of at least Ten
          Million and No/l00 Dollars ($10,000,000.00).

                    6.2.4  Miscellaneous.  The insurance policies to be secured
                           -------------
          by Developer pursuant to this subsection 6.2 shall be obtained from
          insurers having a rating in Best's Insurance Guide of A-10, or better
          (or a comparable rating in any similar Guide, if Best's Guide is no
          longer published or if Best's rating system changes), and shall
          require that the insurer give Landlord notice of any modification,
          termination or cancellation of any policy of insurance no less than
          thirty (30) days prior to the effective date of such modification,
          termination or cancellation. In addition, Developer shall notify
          Landlord of any modification, termination or cancellation of any
          policy of insurance secured by Developer pursuant to this subsection
          6.2 as soon as Developer learns of any such modification, termination
          or cancellation. The policy of public liability and

                                      55
<PAGE>
 
          property damage insurance to be obtained under subsection 6.2.1 above
          shall stipulate that said policy provides primary coverage and is not
          subordinate to nor contributing with any other insurance coverage held
          or maintained by Landlord. The procuring of any such policy of
          insurance shall not be construed to be a limitation upon Developer's
          liability or its full performance on Developer's part of the
          indemnification and hold harmless provisions of this Lease; and
          Developer understands and agrees that notwithstanding any such policy
          of insurance, Developer's obligation to protect, indemnify and hold
          harmless Landlord under this Lease is for the full and total amount of
          any damage, injuries, loss, expense, costs or liabilities caused by or
          in any manner connected with or attributed to the acts or omission of
          Developer, its officers, agents, employees, licensees, patrons or
          visitors, or the operations conducted by Developer, or Developer's use
          or misuse of the Premises, except to the extent resulting from the
          negligent or willful acts of Landlord or any such indemnitee.

                    6.2.5  Blanket Policies.  Nothing contained in this section
                           ----------------
          shall prevent Developer from requiring its subtenants, or any of them,
          or any other third party, to provide the insurance required by this
          Section 6, nor prevent Developer, or any of its subtenants, or any
          such third party from taking out insurance of the kind provided for
          under this section under a blanket insur-

                                      56
<PAGE>
 
          ance policy or policies which cover other personal and real property
          owned or operated by Developer or any subtenant provided that the
          protection afforded Landlord and Developer under any policy of blanket
          insurance hereunder shall be no less than that which would have been
          afforded under a separate policy or policies relating only to the
          Premises.

                    6.2.6  Self-Insurance.  If a subtenant is self-insured as a
                           --------------
          matter of such subtenant's usual and customary business policy and
          such self-insurance is accepted by institutional lenders, Developer
          may request Landlord to waive the insurance requirement and to consent
          and permit such subtenant to self-insure. Such request shall be
          accompanied by information deemed necessary by Landlord to review the
          request. Consent to self-insure shall not be unreasonably withheld if
          the conditions specified in this section have been met.

                    6.2.7  Insurance Adjustments.  The amounts of insurance
                           ---------------------
          specified in subsections 6.2.1 and 6.2.3 may be adjusted in the year
          2000 and not more often than every third year thereafter for the
          duration of the Lease to take into account circumstances at the
          time of such adjustments.

               6.3  Damage or Destruction.
                    ---------------------

                    6.3.1  Restoration of Premises.  If any building or
                           -----------------------
          improvement on the Premises is totally or partially destroyed or
          damaged as a result of any casualty, Developer shall promptly repair,
          replace or rebuild

                                      57
<PAGE>
 
          such building or other improvement at least to the extent of its value
          immediately prior to such occurrence, subject, however, to delays
          resulting from force majeure, the cancellation of existing leases due
          to such casualty, settling with insurers and/or negotiating new
          financing if necessary. If less than twenty (20) years remain of the
          term of this Lease or any extension thereof, Developer may remove all
          damaged or destroyed improvements and place the portions of the
          Premises from which improvements are removed in a clean and level
          condition following which all insurance proceeds attributable to such
          destruction or damage shall be the property of Developer. After the
          commencement of such repair, replacement or rebuilding, Developer
          shall continue such work with reasonable diligence until completion.
          Developer may cause any such work to be performed by or under its
          subtenants. In no event shall Landlord be liable to Developer for any
          damages resulting to Developer from the happening of any such fire or
          other casualty or from the repair or reconstruction of the Premises
          or from the termination of this Lease as provided in subsection 6.3.2
          below.

                    6.3.2  Right to Terminate.  Notwithstanding the provisions
                           ------------------
          of subsection 6.3.1 above, if the buildings and improvements on the
          Premises shall be damaged or destroyed as a result of a hazard against
          which Developer is not required to carry insurance to an extent in
          excess of fifty percent (50%), or more, of

                                      58
<PAGE>
 
          their then insurable value, or if such damage or destruction shall
          occur during the last ten (10) years of the term of this Lease or
          during the last ten (10) years of any extended term of this Lease,
          then Developer shall have the right to elect not to repair, replace or
          rebuild such casualty damage and to cancel this Lease by giving
          written notice thereof to Landlord within three hundred sixty-five
          (365) days after the date of any such damage or destruction. Upon such
          termination, it will be the obligation of Developer to remove all
          damaged or destroyed improvements and to place the portions of the
          Premises from which improvements are removed in a clean and level
          condition.

                   6.3.3.  No Reduction in Rent.  In case of destruction, there
                           --------------------
          shall be no abatement or reduction of rent.


          7.  DEVELOPMENT OF THE PROJECT:
              ---------------------------

              7.1  Scope of Development.  The Project will be a aviation 
                   --------------------
oriented business, office, research and development and industrial park. It is
agreed by the parties that the Project will be built to include when fully
developed, at least 665,500 square feet of building area in one (1) or more
buildings per parcel, no one of which shall exceed the height limits established
by Federal Aviation Regulations (FAR). However, it is recognized that the scope
of development may be changed, enlarged or redistributed to meet a subtenant's
or user's needs or changed conditions. The facade treatment, landscaping and
character of the

                                      59
<PAGE>
 
development will be substantially as proposed in the Long Beach Airport Center
submittal of December 7, 1983, as supplemented by a spiral bound document
entitled "Supplement to Kilroy Industries' December 7, 1983, Proposal", and
included therein is a transmittal letter from Kilroy Industries to the City of
Long Beach, dated January 12, 1984, ("Developer's Long Beach Airport Center
Submittal") on file in the offices of Landlord's Director of Community
Development, or the equivalent of the submitted proposal if approved by Landlord
pursuant to subsection 7.3 hereof.

              Pursuant to the provisions of Section 7.1 of the All-Inclusive
Lease, three (3) acres within the entire Project must be made available for
aircraft use if a reasonable demand for same is expressed by the subtenants of
the site. The three (3) acre allocation need not be restricted to any designated
section of the Project and can change in configuration and location depending on
the needs of the remainder of the parcel and changes in subtenant requirements.
Also pursuant to the provisions of Section 7.1 of the All-Inclusive Lease, the
three (3) acres at any time designated for aircraft use may be used for other
purposes consistent with the Lease and the PD-2 zoning, such as motor vehicle
parking and trucking, as approved by Landlord's Airport Manager, prior to any
actual demand from tenants of the site for aircraft storage. The precise amount
up to three (3) acres, configuration and location of improvements shall be based
on and consistent with the PD-2 zoning ordinance to be adopted, and any
amendment or replacement thereof.

              7.2  Developer's Obligation to Develop Premises. Developer has
                   ------------------------------------------
         commenced the construction of

                                      60
<PAGE>
 
          improvements upon both Parcel 5 and Parcel 6 of the Premises as a part
          of the development contemplated in the Basic Concept Documents or its
          alternative as approved by Landlord pursuant to subsection 7.3.7.

                   7.2.1  Best Efforts to Sublease.  Developer shall at all
                          ------------------------
          times use its best efforts to expedite to the fullest extent
          consistent with the exercise of sound business the making and entering
          into of subleases with subtenants upon terms and conditions
          satisfactory to subtenants and not inconsistent with any of the
          requirements of this Lease.

              7.3  Architectural Approval.
                   -----------------------

                   7.3.1  Restriction.  No buildings or other improvements,
                          -----------
          including without limitation, grading, street, landscaping and parking
          area improvements shall be constructed or maintained upon the
          Premises unless the same conform to and are consistent with the zoning
          for the site, building code requirements and other adopted
          construction standards for public improvements of the City of Long
          Beach and the scope of the Project, as defined in subsection 7.1
          above, and are approved by Landlord as provided in subsection 7.3.7
          below.

                   7.3.2  Basic Concept Documents.  Landlord has heretofore
                          -----------------------
          approved certain documents, including a site development plan, which
          documents are more particularly described in subsection 7.1.  Said
          documents, as the same may from time to time be modified and/or
          supplemented with the approval of Landlord pursuant to sub-

                                      61
<PAGE>
 
          section 7.3.7 below are herein referred to as the "Basic Concept
          Documents".  To the extent that said documents refer to land included
          in the Adjacent Properties shown on Exhibit "B", additional approval
          is required as provided in subsection 1.4.1.

                   7.3.3  Landscaping.  Prior to the construction of any
                          -----------
          landscaping upon the Premises, Developer shall prepare and submit to
          Landlord for Landlord's approval pursuant to subsection 7.3.7 below
          preliminary landscape plans for such work. Following Landlord's
          approval of Developer's preliminary landscape plans for such work and
          prior to the commencement of such work, Developer shall prepare and
          submit to Landlord for Landlord's approval pursuant to subsection
          7.3.7 below final landscape plans for such work. Said landscape plans
          need not include landscaping between building walls and adjacent curbs
          and/or parking areas, it being understood that preliminary and final
          plans for such landscaping may be submitted separately by Developer to
          Landlord for Landlord's approval under subsection 7.3.7 below when the
          requirements of building occupants have been ascertained. Said
          landscape plans shall be consistent with the Basic Concept Documents
          and/or modifications or amendments thereto from time to time approved
          by Landlord. The landscaping plans, if any, itemized on the attached
          Exhibit "G" have been approved in concept by Landlord for purposes of
          this Lease and for no other purposes. In general, Developer shall be
          permitted

                                      62
<PAGE>
 
          freedom of selection of landscaping plants, trees and other materials
          consistent with the Basic Concept Documents and the provisions of
          subsection 3.6.

                   7.3.4  Exterior Elevations.  Prior to the construction of any
                          -------------------
          building improvements upon the Premises, Developer shall prepare and
          submit to Landlord for Landlord's approval pursuant to subsection
          7.3.7 below exterior elevations for such building improvements. Such
          exterior elevations need not include exterior building signs. The
          exterior elevations, if any, itemized on the attached Exhibit "H" have
          been approved in concept by Landlord for purposes of this Lease and
          for no other purposes.

                    7.3.5  Security and Security Plans.  Prior to taking
                           ---------------------------
          possession of the Premises, Developer shall submit to the Landlord for
          approval a site security plan, both for the construction period and
          for the Project as partially and fully developed which shall comply
          with applicable Federal Aviation Regulations and the requirements of
          the Airport Manager. During construction, Developer shall maintain in
          place at all times a site security fence. Developer shall comply with
          FAR Part 107 regarding Airport security and FAR Part 77 regarding
          height limitations. It is particularly important that Developer notify
          the Airport Manager and such other persons as he may direct twenty-
          four (24) hours in advance of erecting cranes on the Premises for any
          purpose. Developer shall pay any fine or penalty
  
                                      63
<PAGE>
 
          imposed on Landlord as a result of security violations on the
          Premises. Developer shall have the right to contest such fine or
          penalty.

                    7.3.6  Amendments.  Developer may from time to time submit
                           ----------
          to Landlord for Landlord's approval pursuant to subsection 7.3.7 below
          modifications and/or amendments to any of the items described in
          subsections 7.3.3 through 7.3.5 above theretofore approved by 
          Landlord.
          

                    7.3.7  Landlord Approval.  Developer shall submit all plans
                           -----------------
          required by subsections 7.3 and 3.7 to Landlord, attention Director of
          Community Development, who shall coordinate the review and approval of
          such plans with the Airport Manager. Landlord shall either approve or
          disapprove of any item submitted for approval to Landlord by Developer
          pursuant to subsections 7.7.3 through 7.3.6 above and subsection 3.7
          within fifteen (15) days of Landlord's receipt thereof by giving
          written notice of such approval or disapproval to Developer. Any such
          disapproval shall state in writing the reasons for disapproval.
          Failure by Landlord to expressly so disapprove of any such item within
          such fifteen (15) day period shall constitute Landlord's approval of
          such item.
 
                    The criteria to be used by Landlord in approving or
          disapproving any such item shall be (i) compliance with the Basic
          Concept Documents and PD-2 zoning, (ii) exterior aesthetics, (iii)
          consistency with prior

                                      64
<PAGE>
 
          improvement on the Premises, (iv) relationship of improvements to
          adjacent land, including public rights-of-way, (v) the general
          function of the spaces within the Project between building areas and
          adjacent public rights-of-way, consistent with overall project design.
          In general, Developer shall be permitted freedom of design of all
          exteriors.

                   In the event Landlord disapproves of any such item, Developer
          may cause such item to be appropriately revised and resubmit the same
          to Landlord for approval pursuant to this subsection 7.3.7. Landlord
          and Developer agree to cooperate reasonably each with the other in
          resolving any objections of the other to such item and/or requested
          modifications by the other party.

                    The provisions of this section with respect to notice,
          time for and method of approval shall apply to any such revised item
          resubmitted to Landlord for approval.  Upon the approval of any such
          item, Landlord shall execute and return a copy of such item to
          Developer marked approved by Landlord with the date of such approval. 

                    Any item to be approved or disapproved by Landlord shall be
          deemed to have been submitted to and received by Landlord on the date
          such item is delivered to or received at the office of the Director of
          Community Development of Landlord.

                   7.3.8  Communication and Consultation.  Landlord and 
                          ------------------------------
          Developer agree to communicate and consult

                                      65
<PAGE>
 
          informally as frequently as is necessary to insure that the formal
          submittal of any item pursuant to this section can receive prompt and
          speedy consideration. In addition, during the period that Developer is
          preparing drawings and specifications for buildings and other
          improvements to the Premises, Landlord agrees, upon request of
          Developer, to schedule and hold regular progress meetings in order to
          coordinate the compliance of such drawings and specifications with the
          construction requirements of this Lease.

                    7.3.9  Requirements of Institutional Lender or Major
                           ---------------------------------------------
          Occupant.  If any revisions or corrections of drawings and
          --------
          specifications, landscape and grading plans and/or site plans
          consistent with the items heretofore approved by Landlord or approved
          by Landlord pursuant to this section are required by any institutional
          lender providing or proposing to provide financing to Developer or
          major occupant or proposed major occupant for a building, Developer
          and Landlord shall cooperate with each other in efforts to obtain the
          waiver of such requirements or to develop a mutually acceptable
          alternative. A major occupant shall be deemed a person or entity
          occupying or proposed to occupy all of a freestanding building or in
          excess of 50,000 square feet of building floor area upon initial
          occupancy. If no such waiver is obtained and no such alternative is
          developed, Landlord shall amend the items so approved by Landlord
          pursuant to this section as may reasonably be required

                                      66
<PAGE>
 
          for consistency with such revisions or corrections. Any amendment of
          items approved by the Landlord does not constitute a waiver of other
          legal, governmental approvals.

                    7.3.10  Interior Improvements.  During the term hereof,
                            ---------------------
          Developer shall have the right to make, at no expense to Landlord,
          interior improvements to any building, and thereafter to make changes,
          alterations, further improvements and additions in and to the interior
          of any building as Developer may desire, subject to all applicable
          codes, ordinances and statutes.

                    7.3.11  Modification of Plans.  Developer may make changes
                            ---------------------
          and modifications to plans and specifications for buildings which are
          not material or to resolve an inconsistency or ambiguity without
          obtaining Landlord's prior approval. Landlord agrees that Developer
          may cause the plans for any building to be modified to the extent
          required to adapt the same to soil or other conditions found on the
          Premises and to the extent modification thereof is required by any
          governmental agencies or authorities having jurisdiction to approve
          such plans, all without resubmitting the same to Landlord for
          Landlord's reapproval.

               7.4  Performance and Payment Bonds.
                    -----------------------------
                    7.4.1  Agreement to Provide.  On or before the date of
                           --------------------
          commencement of construction of any building, structure or other
          improvements on the Premises having an estimated cost of One Million
          and No/l00 Dollars

                                      67
<PAGE>
 
          ($1,000,000.00) or greater, Developer shall file or cause to be filed
          with Landlord a performance bond and labor and material payment bond
          executed by Developer or Developer's contractor or subtenant, as
          principal, and by a surety authorized to do business in the State of
          California, as surety, conditioned upon the contractor's performance
          of its construction contract with Developer and payment to all
          claimants for labor and materials used or reasonably required for use
          in the performance of such contract, in a form and with a surety
          reasonably acceptable to Landlord. Forms of bond which generally are
          acceptable hereunder are attached hereto and marked Exhibit "I". Said
          bond shall name or be endorsed to name Landlord as a joint obligee
          with Developer and/or Developer and Developer's lender. Landlord
          agrees to either approve or disapprove of any such proposed bond
          submitted to Landlord for approval within ten (10) days of Landlord's
          receipt thereof. Any notice of disapproval shall specify the reasons
          for disapproval and the modifications required to secure Landlord's
          approval. Landlord's failure to expressly so disapprove of any such
          bond within said ten (10) day period shall constitute Landlord's
          approval of the form of such bond and of the surety issuing such bond.

                   7.4.2  Term of the Bond.  The term of both bonds shall 
                          ----------------
          commence on or before the date of filing with Landlord. The 
          Performance Bond shall remain in

                                       68
<PAGE>
 
          effect until the date of completion of the work to the reasonable
          satisfaction of Landlord's City Manager or his designee. The Payment
          Bond shall remain in effect until the expiration of the period of
          filing a claim of lien as provided in Title 15 of Part 4 of the
          California Civil Code, and as hereafter amended, or if a claim of lien
          is filed, the expiration of the period for filing an action to
          foreclose such lien, or until the Premises are freed from the effect
          of such claim of lien and any action brought to foreclose such lien
          pursuant to the provisions of said Title 15 of Part 4 or the lien is
          otherwise discharged.

                    7.4.3  Penal Sum.  The Performance Bond shall be in the 
                           ---------
          amount and provide a penalty of one hundred percent (100%) of the cost
          of the improvements to be constructed as such cost shall be determined
          by the Developer. The Payment Bond shall be in the amount and provide
          a penalty of one hundred percent (100%) of the valuation of the
          improvements to be constructed.

                    7.4.4  Alternative Performance.  In lieu of the Performance
                           -----------------------
          Bond and Payment Bond required by this subsection 7.4, Developer may
          furnish cash, assignment of account, or a time certificate of deposit
          or irrevocable letter of credit conditioned only on the terms of this
          Lease or such other form of security as may be agreed upon by the
          parties.

               7.5  Construction.
                    ------------
                    7.5.1.  Costs of Construction.  Except as pro-
                            ---------------------

                                      69
<PAGE>
 
          vided in subsections 3.8 and 7.5.10, the entire cost and expense of
          constructing any and all improvements on the Premises, including
          without limitation any and all on and off-site improvements required
          by applicable governmental authorities under applicable zoning
          ordinances or as a condition to parcel or final map approvals, shall
          be borne and paid by Developer, or its subtenants, and Developer shall
          hold and save Landlord and the Premises harmless from any liability
          whatsoever on account thereof.

                   7.5.2  Right to Improve.  Developer shall have the right to
                          ----------------
          construct buildings and other improvements upon the Premises and shall
          have the right to change the grade of the Premises and to perform all
          off-site work included within the scope and intent of the Basic
          Concept Documents and/or to demolish and remove any and all
          structures, foliage and trees situated upon the Premises as of the
          date of this Lease as may reasonably be required for the purpose of
          improving the same incidental to Developer's or a subtenant's use of
          the Premises; provided, that such work shall be performed in
          accordance with the applicable requirements of this Section 7, and
          such laws of any governmental entity as may be applicable thereto and
          that arrangements for access to adjacent leaseholds are completed
          prior to commencement of work on those areas.  Any and all
          improvements, constructed by or for the Developer, except off-site
          improvements, shall be owned by Developer and

                                      70
<PAGE>
 
          its successors or assigns during the term of this Lease and, unless
          removed by Developer upon the expiration of the term of this Lease as
          permitted by subsection 17.10 below, shall become a part of the realty
          and the absolute property of Landlord upon the expiration or earlier
          termination of the term of this Lease.

                    7.5.3  Governmental Permits.  Before commencement of
                           --------------------
          construction or development of any buildings, structures, or other
          work or improvements upon the Premises or within the Project area,
          Developer shall, at its own expense with the cooperation of Landlord,
          secure or cause to be secured any and all permits which may be
          required by the City of Long Beach or any other governmental agency
          having authority over such construction, development or work.
          Developer shall provide a copy of each such permit to the Landlord
          prior to commencing the subject work or activity.

                    7.5.4  Rights of Access.  For the purposes of assuring
                           ----------------
          compliance with this Lease, representatives of Landlord in addition to
          those conducting inspections required by Landlord, shall have the
          right of access to the Premises without charges or fees, at normal
          construction hours, during the period of construction for the purposes
          of this Lease, including but not limited to the inspection of the work
          being performed in constructing the improvements required by this
          Lease. Such representatives of Landlord shall be those who are so
          identified in writing by the Director of Community

                                      71
<PAGE>
 
          Development of Landlord, except that those employees of the City of
          Long Beach conducting inspections required by law need not be so
          identified.

                    7.5.5  Local, State and Federal Laws.  Developer shall carry
                           -----------------------------
          out or cause to be carried out the construction of any buildings,
          structures or other work or improvements upon the Premises in
          conformity with all applicable laws. Any buildings, structures or
          other improvements constructed or placed upon the Premises by or under
          Developer, shall be constructed or placed in accordance with the laws
          and regulations of the State of California and of the City of Long
          Beach applicable to the Premises. Any applicable Federal Aviation
          Regulation (FAR) shall also be complied with.

                    7.5.6  Antidiscrimination During Construction.  Developer 
                           --------------------------------------
          for itself and its successors and assigns agrees that in the
          construction of any improvements provided for in this Lease that
          Developer will not discriminate against any employee, or applicant for
          employment because of age, sex, marital status, race, handicaps,
          color, religion, creed, ancestry or national origin.

                    7.5.7  Responsibilities of Landlord.
                           -----------------------------

                         7.5.7.1  Governmental Approvals.  Landlord will assist
                                  ----------------------
               and cooperate with Developer in connection with requests by
               Developer for lot line adjustments, tentative or final, parcel,
               tract or subdivision map approval, condominium plan approval,

                                      72
<PAGE>
 
              variances and any other govenmental approvals necessary for or
              which will facilitate the development of the Premises, pursuant to
              this Lease including, without limitation, the execution of
              documents required to dedicate or offer for dedication or restrict
              or otherwise encumber or subdivide by parcel or final maps or
              condominium plans portions of the Premises as may be required by
              applicable governmental authorities.

                    7.5.7.2  Easements.  Landlord agrees to join in granting or
                             ---------
              dedicating such public or private utility company easements as may
              be required for the development of the Premises, for which no
              consideration is given. With the exception of landscaping and
              appurtenant structures as provided in subsection 7.5.9, Developer
              shall have no responsibility for maintaining public rights-of-way,
              sewers, storm drains and other facilities after dedication of same
              to Landlord by Developer, and Landlord agrees to accept the same
              for maintenance purposes.

                    7.5.7.3  Off-Site Improvements.  Subject to any limitation
                             ---------------------
              of law, Landlord shall take all such action as is necessary and
              prudent in order to permit Developer to install and construct the
              off-site improvements which are necessary to initially make the
              Premises suitable for development according to Developer's Basic
              Concept Documents.

                                      73
<PAGE>
 
              The nature of such actions by Landlord and the nature and extent
              of such off-site improvements are defined in the attached Exhibit
              "F" ("Off-site Improvements"). The costs of all rights-of-way and
              improvements described in Exhibit "F" shall be included in
              Predevelopment and Infrastructure Costs in the manner set out in
              subsections 3.6 through 3.11.

                       7.5.7.4  Bond Financing.  Landlord further agrees to 
                                --------------
              assist with Developer's financing of the development of the
              Premises by cooperating reasonably with Developer and using
              reasonable efforts to sell or to cause any appropriate agency of
              the City of Long Beach to sell industrial development bonds as a
              source for such financing, if such action is legally permissible;
              by granting to or for the benefit of the holders of any special
              assessment or district bonds constituting a first lien on
              Developer's Leasehold Estate, or their trustee, rights and
              remedies of a similar nature afforded Leasehold Mortgagees under
              Section 4 hereof.

                   7.5.8  Responsibilities of Developer.  Developer, without
                          -----------------------------
         expense to Landlord, shall perform all work specified of Developer in
         this Lease. In addition, Developer shall furnish Landlord's Director of
         Community Development with semi-annual progress reports demonstrating
         good faith compliance with the construction

                                      74
<PAGE>
 
          requirements of this Lease on or before each semiannual period
          commencing with the sixth month anniversary of the date of this Lease,
          through the occurrence of the completion date of such construction.

                   7.5.9  Maintenance.  In addition to the responsibilities
                          -----------
          mentioned herein, Developer shall have sole and exclusive
          responsibility for maintaining the Premises and all building
          structures and improvements which may be constructed upon the Premises
          in good condition and repair, at no cost or expense to Landlord,
          reasonable wear and tear excepted. Developer shall also maintain all
          landscaping and appurtenant structures installed in accordance with
          plans approved pursuant to Section 7. Landlord will consider a request
          to maintain landscaping in public rights-of-way.

                    7.5.10  Acceptance of Premises.  Developer accepts the
                            ----------------------
          Premises in an "as-is" condition, except for subsurface hazardous
          materials and munitions, which are the responsibility of Landlord to
          remove at Landlord's expense, and also except for subsurface
          conditions under existing leased premises demised to Tommie E.
          Rutherford dba Stripbright Company, and acknowledges that Developer
          has not received and Landlord has not made any warranty, express or
          implied, as to the condition of the Premises. Developer agrees to bear
          all expenses incurred in the development, operation and maintenance of
          the Premises, except for improvements and facilities dedicated for
          public use to Landlord or

                                      75
<PAGE>
 
          other governmental authority, and except for removal and disposition
          of subsurface hazardous materials and munitions.

               7.6  Subdivided Leases.  For the purpose of facilitating the
                    -----------------
development of the Project and obtaining financing and refinancing of
improvements to be constructed thereon, at any time and from time to time during
the term, within thirty (30) days after notice of demand from Developer,
Landlord shall enter into separate new leases ("Subdivided Lease") so that there
shall be one lease for each developable parcel in the Premises. The Subdivided
Leases described herein shall be for the sole purpose of lease, sale or
financing of the development. In all matters affecting the relationship, rights
or obligations of the parties hereto, or in the case of any inconsistency
between the language of the documents, this Lease as undivided and unmodified
shall govern except that as to the individual subdivided lease parcels, rents,
security deposits, legal descriptions and requirements governing amount and
level of construction may be varied to conform to the specifics of such parcel,
as long as the totals in all such categories for all subdivided leases added
together correspond to the totals expressed in this document. Developer has
heretofore paid to Landlord as a separate charge apart from rents a one time
charge to reimburse Landlord's costs and expenses in separating the leases and
reviewing and administering all the leases as separated in the sum of Five
Thousand Dollars ($5,000.00). Each Subdivided Lease shall:

                   7.6.1  Same Parties.  Have the same parties as the parties
                          ------------
          to this Lease.

                                      76
<PAGE>
 
                    7.6.2  Obligations of Subdivided Leases.  Be released from
                           --------------------------------
          the overall obligations expressed in this Lease to pay rent and to
          carry out specific levels of construction within specific periods,
          provided, however that each such parcel shall be subject to an
          appropriate proportionate share of such obligations such that the
          total of such obligations divided among separated leases is not less
          than the total of such obligations expressed in this Lease. All other
          obligations imposed by this Lease shall apply to each such separate
          parcel as an undivided shared obligation. As to any conflict between
          the Subdivided Leases or all of them and this Lease, the terms of this
          Lease shall govern.

                    7.6.3  Terms, Covenants.  Contain the same terms, covenants,
                           ----------------
          provisions, conditions and agreements as those contained in this Lease
          except that:

                        7.6.3.1  Ground Rent.  The Ground Rent and other 
                                 -----------
             periodic payments to be made by Developer as part of Developer's
             obligation under this Lease and the security deposit under
             subsection 16.1 shall under the Subdivided Lease, bear
             substantially the same proportion to amounts provided in this Lease
             as the area of the Premises in the Subdivided Lease bears to the
             area of the Premises in this Lease. Provided, however, that if the
             fair market value of any land included in a Subdivided Lease is
             substantially greater or less than the balance of the land included
             in this Lease, then the Ground Rent

                                      77
<PAGE>
 
             may be appropriately varied between the Subdivided Lease and this
             Lease in order to take into account such variance in the fair
             market land value.

                        7.6.3.2  Improvements.  Any improvements constructed 
                                 ------------ 
             upon the Premises demised by a Subdivided Lease shall satisfy
             Developer's obligations imposed by this Lease. The right of
             Developer to make improvements shall be apportioned around the
             Subdivided Leases substantially as is provided in subsection
             7.6.3.1.

                        7.6.3.3  Easements and CC & R's.  Each Subdivided Lease
                                 ----------------------
             shall contain all cross-easements, covenants, conditions,
             restrictions and agreements requested by Developer, and approved by
             Landlord, provided they reasonably facilitate separating this Lease
             into individual Subdivided Leases within the overall intent of this
             Lease.

                        7.6.3.4  Description of Property.  Each Subdivided 
                                 -----------------------
             Lease shall cover only that portion of the Premises specified by
             Developer in Developer's notice of demand, provided that Developer
             shall accompany each notice of demand with an accurate survey and
             metes and bounds description of the portion of the Premises to be
             covered by the Subdivided Lease; or if the Premises have been
             divided into separate parcels, with the appropriate parcel map
             description of such Premises.

                        7.6.3.5  Excluded Matters.  Obligations
                                 ----------------

                                      78
<PAGE>
 
          under this Lease which have been satisfied or which are not applicable
          shall be excluded from a Subdivided Lease.

          7.7  Combining Leases.  At any time and from time to time after the
               ----------------
execution of any such Subdivided Lease, within thirty (30) days after notice of
demand from Developer, Landlord shall enter into a single lease ("Single Lease")
combining any two or more of the Subdivided Leases, covering all the portions of
the Premises covered by the component Subdivided Leases, and containing the same
terms, covenants, provisions, conditions and agreements as those contained in
the component Subdivided Leases, except that:

                   7.7.1  Ground Rent.  The Ground Rent and other periodic
                          -----------
          payments to be made by Developer as part of Developer's obligation
          under the Single Lease shall be the sum of the Ground Rent and other
          periodic payments payable under the component Subdivided Leases;

                   7.7.2  Easements and CC & R's.  The Single Lease shall
                          ----------------------
          contain all cross easements, covenants, conditions, restrictions and
          agreements requested by Developer and approved by Landlord provided
          they reasonably facilitate combining the component Subdivided Leases
          and integrating the operation of the Single Lease with that of any
          Subdivided Leases still outstanding within the overall intent of this
          Lease.



          8.  USE:
              ---

              8.1  Permitted Development.  The Project shall be
                   ---------------------
                    
                                      79
<PAGE>
 
an aviation oriented business, office, research and development and industrial
park, with offices and facilities and space for sublease to subtenants,
including tenant-required aviation and other ancillary and related uses.

               8.2  Aviation Related Uses.  Any aviation and/or aircraft 
                    ----------------------
related uses shall be subject to the terms and conditions of this Lease and to
the terms and conditions governing Fixed Base Operations on the Long Beach
Municipal Airport, "Master FBO Lease", which terms and conditions are
incorporated in the Master FBO Lease attached hereto, marked Exhibit "K" and
made a part hereof and shall be binding upon Developer, its tenants, subtenants
and assigns, provided, however, as to Developer only in case of any conflict
between this Lease and the Fixed Base Operation Lease, the business terms of
this Lease shall prevail, and the aviation operation requirements of the Fixed
Base Operation Lease shall prevail as to aviation uses. Access to the Airport
operating areas shall be made available for any aircraft based on the Premises.
All non-aviation areas shall be separated from the Airport operating areas by
security fencing approved by the Airport Manager.

               8.3  Inapplicable Provision.
                    -----------------------

               8.4  Vehicle Parking.  No vehicle not related to or used in the 
                    ---------------
business of Developer or its subtenants or their respective employees, agents,
guests or invitees shall be parked on the Premises for any period greater than
twenty-four (24) hours

               8.5  Federal Aviation Administration. Use of the Premises shall
                    -------------------------------
conform to and be limited by applicable zoning regulations, any conditions
lawfully imposed by duly empowered

                                      80
<PAGE>
 
governmental authority having jurisdiction over the Premises, the terms,
covenants, conditions and restrictions imposed by this Lease and such lawful
rules and regulations of the Federal Aviation Administration ("FAA") as may be
applicable from time to time to the Premises. The conditions imposed by the FAA
as of the date of this Lease are attached hereto, marked Exhibit "L" and made a
part hereof. The conditions set out in Exhibit "L" are applicable only to those
portions of the Premises used for aviation or aircraft purposes. Landlord shall
cooperate fully with Developer in obtaining all required FAA approvals. Landlord
understands that FAA has been made aware of the nature of the development
proposed for the Premises and as of the date of this Lease, Landlord has not
received communication from FAA indicating that the type of development proposed
would not be permitted if it complied with all applicable regulations.

               8.6  Inspection.  At all times during the term of this Lease, 
                    ----------
Landlord shall retain the right of access to and ingress and egress over the
Premises to inspect aviation related operations and to enforce codes or
ordinances and provisions of this Lease, subject to governmental and reasonable
subtenant security requirements.



          9.  LIENS:
              -----
              9.1  Developer's Responsibility.  Developer shall not permit any
                   --------------------------
liens to be enforced against Landlord's interests in and to the land comprising
the Premises, nor against Developer's leasehold interest therein by reason of
work, labor, services ox materials supplied or claimed to have been supplied to
Developer

                                      81
<PAGE>
 
or anyone holding the Premises, or any part thereof, through or under
Developer, and Developer agrees to indemnify Landlord against such liens.

              9.2  Notice of Work.  Before any buildings, structures or other
                   --------------
improvements or additions thereto, having a cost in excess of One Hundred Fifty
Thousand and No/100 Dollars ($150,000.00) are constructed or reconstructed upon
the Premises, Developer shall serve written notice upon the Landlord in the
manner specified in this Lease of Developer's intention to perform such work for
the purpose of enabling Landlord to post notices on non-responsibility under the
provisions of Section 3094 of the Civil Code of the State of California, or any
other similar notices which may be required by law.

              9.3  Discharge of Liens.  If any mechanics liens or other liens 
                   ------------------
shall be filed by reason of work, labor, services or materials supplied or
claimed to have been supplied to Developer or anyone holding the Premises, or
any part thereof, through or under Developer, Developer shall cause the same to
be discharged of record within sixty (60) days after notice to Developer of the
filing thereof, or otherwise free the Premises from the effect of such claim of
lien and any action brought to foreclose such lien within such sixty (60) day
period, or Developer, within such sixty (60) day period, shall promptly furnish
to Landlord a bond in an amount and issued by a surety company satisfactory to
Land lord securing Developer against payment of such lien and against any and 
all loss or damage whatsoever in any way arising from failure of Developer to
discharge such lien.

              9.4  Landlord's Right to Pay.  In the event Devel-
                   -----------------------

                                      82
<PAGE>
 
oper fails to perform its obligations under subsection 9.3 above with respect to
any lien within the sixty (60) day period specified in subsection 9.3 above,
Landlord may, but shall not be obligated to pay the amount thereof, inclusive of
any interest thereon, and any costs assessed against Developer in said
litigation, or may discharge such lien by contesting its validity or by any
other lawful means.

              9.5  Reimbursement of Landlord.  Any amount paid by Landlord for
                   -------------------------
any of the expenses described in subsection 9.4 above, and all reasonable legal
and other expense of Landlord, including reasonable counsel fees, and costs of
suit, in defending any such action or in connection with procuring the discharge
of such lien, with all necessary disbursements in connection therewith, together
with interest thereon at the rate provided by law from the date of payment shall
be repaid by Developer to Landlord on demand.



          10. CONDEMNATION:
              ------------

              10.1  Definition of Terms.  The following definitions shall govern
                    -------------------
interpretation of this subsection.

                   10.1.1  Total Taking.  The term "total taking as used in this
                           ------------
          Section 10 means the taking of the entire Premises under the power of
          eminent domain or the taking of so much thereof as the parties
          mutually agree will prevent or substantially impair the use of the
          Premises of the uses and purposes than being made or proposed to be
          made by Developer of the Premises. If the parties do not agree as to
          whether prevention
                                      83
<PAGE>
 
          or substantial impairment has occurred, that issue may be arbitrated
          as provided in the rules for arbitration published by the American
          Arbitration Association. Each party shall pay half of the cost of such
          arbitration.

               10.1.2  Partial Taking.  The term "partial taking" means the 
                       --------------
          taking of a portion only of the Premises which does not constitute a
          total taking as defined above.

               10.1.3  Voluntary Conveyance.  Neither party to this Lease will
                       --------------------
          voluntary convey any interest related to this Lease to any agency,
          authority or public utility under threat of a taking under the power
          of eminent domain in lieu of formal proceedings without first
          providing written notice to the other of any request or intention to
          do so.

               10.1.4  Date of Taking.  The term "date of taking" shall be the
                       --------------
          date title to the Premises or portion thereof passes and vests in the
          condemnor or the date of entry of an order for immediate possession
          with any judicial proceeding in eminent domain or the date physical
          possession of the Premises is taken or interfered with, whichever
          first occurs.

               10.1.5  Leased Land.  The term "leased land" means the real 
                       -----------
          property demised hereby, but exclusive of any and all improvements
          situated upon the Premises at the commencement of the Lease term and
          also exclusive of all improvements constructed or placed thereon by or
          under Developer and exclusive of any grading and

                                      84
<PAGE>
 
      other site work performed by or under Developer.

          10.2  Effect of Taking.  If during the term hereof there shall be a
                ----------------
total or partial taking under the power of eminent domain, then the Leasehold
Estate of Developer in and to the Premises, in the event of a total taking, or
the portion thereof taken, in the event of a partial taking, shall cease and
terminate, as of the date of taking thereof.  If this Lease is so terminated in
whole or in part, all Ground Rent and other charges payable by Developer to
Landlord hereunder attributable to the Premises, or portion thereof taken, shall
be paid by Developer up to and prorated through the date of taking by the
condemnor. Any portion of the security deposit provided for in subsection
16.1.1 fairly attributable to the terminated portion of the Leasehold Estate
shall be repaid to Developer and the parties shall thereupon be released from
all further liability in relation thereto.

          10.3  Allocation of Award.  All compensation and damages awarded in
                ------------------- 
connection with any taking, total or partial, of the Premises including any
improvements thereon shall be allocated so that Developer shall receive that
portion of the award attributable to the value determined for improvements then
existing on the Premises, the value of Developer's leasehold interest in the
Premises and severance or other damages to buildings or the Leasehold Estate.
The remainder of the award, including all portions of the award attributable to
the value of the land as affected by the leasehold, and any severance or other
damages to the land, shall be payable to Landlord.

          10.4 Reduction of Ground Rent on Partial Taking. 
               ------------------------------------------

                                      85
<PAGE>
 
In the event of a partial taking, the Ground Rent payable by Developer shall be
adjusted from the date of taking to the next adjustment date (see subsection
3.2.1). Such Ground Rent adjustment caused by the partial taking shall be made
by reducing the Ground Rent payable by Developer based on the ratio between the
fair market value of the leased land at the date of taking and the fair market
value of the leased land remaining immediately thereafter valued for the use
being made of the leased land by Developer prior to such taking.

          l0.5  Temporary Taking.  If all or any portion of the Premises shall
                ----------------
be taken by any competent authority for temporary use or occupancy, this Lease,
at the option of Developer, shall continue in full force and effect without
reduction or abatement of rent, notwithstanding any other provision of this
Lease, statute or rule of law to the contrary, and Developer shall, in such
event, be entitled to the entire award for such taking to the extent that the
same shall be applicable to the period of such temporary use or occupancy
included in the term of this Lease and Landlord shall be entitled to the
remainder thereof.



          11.  ALTERATIONS BY DEVELOPER:
               ------------------------

          Developer shall have the right at any time and from time to time
during the Lease term to make, at its sole cost a expense, such changes and
alterations, structural or otherwise, in or to the improvements, other than
dedicated public improvements, constructed upon the Premises as Developer shall
deem necessary or desirable, including without limitation, the right 

                                      86
<PAGE>
 
to remove and/or demolish buildings and other improvements provided that other
buildings or improvements are constructed in their place if such demolition
occurs when twenty (20) or more years are remaining in the term of this Lease,
including any extensions hereof. The rights granted by this section shall be
limited to and their exercise shall comply with the terms of Section 7 and
subsection 3.3 hereof.



          12.  TAXES AND ASSESSMENTS:
               ---------------------

               12.1  Payment by Developer.  Developer recognizes and understands
                     --------------------
that this Lease may create a possessory interest subject to property taxation
and that Landlord may be subject to the payment of property taxes on such
interest. Developer shall pay prior to delinquency all real estate taxes and
assessments on the Premises and/or Developer's possessory interests therein
levied during the term of this Lease. Developer shall not place or allow to be
placed on the Premises, or any part thereof, any mortgage, trust deed,
encumbrance or lien unauthorized by this Lease. Developer shall remove or have
removed any levy or attainment made on any of the Premises, or any part thereof,
or assure the satisfaction thereof within a reasonable time, but in any event
prior to a sale thereof. Nothing herein contained shall be deemed to prohibit
Developer from contesting the validity or amounts of any tax, assessment,
encumbrance or lien, nor to limit the remedies available to Developer in respect
thereto.

               12.2  Installment Payments.  If any real estate, special tax or
                     --------------------
assessments are at any time during the term of this Lease, levied or assessed
against the Premises or Developer's

                                      87
<PAGE>
 
Leasehold Estate hereunder, which, upon exercise of any option permitted by the
assessing authority, may be paid in installments or converted to an installment
payment basis (irrespective of whether interest shall accrue on unpaid
installments), Developer may elect to pay such taxes or assessments in
installments with accrued interest thereon. In the event of such election,
Developer shall be liable only for those installments of such taxes or
assessments which become payable during the term of this Lease, and Developer
shall not be required to pay any such installment which becomes due and payable
after the expiration of the term of this Lease. Landlord shall execute whatever
documents may be necessary to convert any such taxes or assessments to such an
installment payment basis if requested so to do by Developer and if such action
is authorized by law then in effect.

          12.3  Proration.  Any real estate taxes and assessments which are
                ---------
payable by Developer hereunder shall be prorated between Landlord and Developer
at the commencement and expiration or earlier termination of the term of this
Lease if such real estate taxes and assessments relate to a fiscal period of the
levying authority which arose before the term commenced or extends beyond the
expiration or earlier termination of the term hereof.

          12.4  Right to Contest.  Developer and any subtenant, with Developer's
                ----------------
consent, shall have the right to contest the amount or validity of any real
estate taxes and assessments, in whole or in part, by appropriate administrative
and legal proceedings, without any cost or expense to Landlord, and Developer
may postpone payment of any such contested real estate 

                                      88
<PAGE>
 
taxes and assessments pending the prosecution of such proceedings and any
appeals so long as such proceedings shall operate to prevent the collection of
such real estate taxes and the sale of the Premises to satisfy any lien arising
out of the nonpayment of the same, provided, however that if at any time payment
of the whole or any part thereof shall become necessary in order to prevent the
termination of the right of redemption of any property affected thereby, or if
there is to be an eviction of Developer because of nonpayment thereof, Developer
shall pay the same in order to prevent such termination of the right of
redemption or such eviction. Landlord shall execute and deliver to Developer
whatever documents may be within Landlord's legal authority necessary or proper
to permit Developer or any subtenants, with Developer's consent, to so contest
any real estate taxes or which may be necessary to obtain payment of any refund
which may result from any such proceedings. Any such contest shall be at no cost
or expense to Landlord. Each refund of any tax or assessment so contested shall
be paid to Developer.



          13.  CERTIFICATES BY DEVELOPER AND LANDLORD:
               -------------------------------------- 

               13.1  Developer to Provide.  Developer agrees upon not less than
                     --------------------
twenty (20) days' notice by Landlord to execute, acknowledge and deliver to
Landlord a statement in writing certifying (i) that this Lease is unmodified and
in full force and effect (or if there have been modifications that the same is
in full force and effect as modified and stating the modifications); (ii)
whether or not to the best knowledge of Developer there are then existing any
offsets or defenses against the enforcement of

                                      89
<PAGE>
 
any of the terms, covenants or conditions hereof upon the part of Developer to
be performed and, if so, specifying the same; and (iii) the dates to which the
Ground Rent and other charges have been paid, it being intended that any such
statement delivered pursuant to this subsection may be relied upon by any
prospective purchaser of the fee of the real property comprising the Premises.

               13.2  Landlord to Provide.  Landlord agrees upon not less than
                     -------------------
twenty (20) days' prior notice by Developer, to execute, acknowledge and deliver
to Developer a statement in writing certifying (i) that this Lease is unmodified
and in full force and effect (or if there have been modifications, that the same
is in full force and effect as modified and stating the modifications); (ii) the
dates to which the Ground Rent and other charges have been paid; (iii) stating
whether or not to the best knowledge of Landlord, Developer is in default in
performance of any covenant, agreement or condition contained in this Lease and,
if so, specifying each such default of which Landlord may have knowledge; and
(iv) whether or not there are to Landlord's best knowledge any offsets or
defenses claimed by and/or available to Developer to the payment or rental, it
being intended that any such statement delivered pursuant to this subsection may
be relied upon by any prospective assignee or subtenant of the whole or any
portion of the Premises, or by any lender extending credit on the security of
Developer's Leasehold Estate.



          14.  QUIET ENJOYMENT:
               ---------------
                 
          Landlord covenants that Developer, upon the performance of the
covenants and agreements herein contained on Developer's
                                      90
<PAGE>
 
part to be performed, shall and may at all times, for itself and its subtenants,
peaceably and quietly have, hold and enjoy the Premises during the term of this
Lease.


          15.  TERMINATION AND FURTHER LEASING:
               -------------------------------

               15.1  Termination.  Subject to the provisions of Section 4, this
                     -----------
Lease may be terminated at any time by mutual agreement of the parties.

               15.2  Termination by Developer.  Developer may terminate this
                     ------------------------
Lease in the event Developer is unable to secure an extended coverage leasehold
policy of title insurance, within ninety (90) days following execution of this
Lease containing only those exceptions approved by Developer, provided, however,
that Developer shall have first given Landlord sixty (60) days notice of its
intention to terminate during which time Landlord shall have an opportunity to
cure the deficiency.

               15.3  Termination by Landlord.  Subject to the provision of
                     -----------------------
Section 4 of this Lease, Landlord may terminate this Lease under the following
circumstances:

                   15.3.1  Developer fails to pay rent or any other charge
          required by this Lease.

                   15.3.2  Developer assigns this Lease in violation of
          subsection 5.1.

                   15.3.3  Failure of Developer to submit drawings or related
          documents required by this Lease.

                   15.3.4  Failure of Developer to provide the good faith
          deposit required by this Lease.

                   15.3.5  Bankruptcy of Developer.  Final ad-


                                      91
<PAGE>
 
          judication or filing of a voluntary petition for bankruptcy by
          Developer.

               Provided, however, that in all cases, Landlord shall give
Developer sixty (60) days prior written notice of its intention to terminate,
during which time Developer shall have an opportunity to cure the default.
However, if the default is of a nature such that it cannot be cured within sixty
(60) days, Developer shall not be in default if Developer shall commence such
use and diligently prosecute it to completion.



          16.  SECURITY DEPOSIT:
               ----------------

              16.1  Good Faith Deposit.
                    ------------------

                    16.1.1  Receipt by Landlord.  Developer has, concurrently
                            -------------------
          with the execution and delivery of the All-Inclusive Lease, delivered
          to Landlord a good faith deposit in the amount of One Million and
          No/100 Dollars ($1,000,000.00) as security for the performance of the
          obligations of Developer to be performed in accordance with the
          provisions of the All-Inclusive Lease.  The receipt of the deposit is
          hereby acknowledged by Landlord.  The parties acknowledge that Two
          Hundred Ninety-Five Thousand  Four Hundred Twenty-Eight and 97/100
          Dollars ($295,428.97) of such good faith deposit shall be allocated to
          and be held by Landlord pursuant to this Lease.

                   16.1.2  Form of Deposit.  The good faith deposit, at the
                           ---------------
          option of Developer, may be in the form of (i) cash; or (ii) cashier's
          or certified check; or

                                      92
<PAGE>
 
(iii) negotiable certificate or certificates of deposit issued by a federal or
state bank or savings and loan association; or (iv) an irrevocable letter of
credit in favor of Landlord issued by an established bank or other institution
satisfactory to Landlord; or (v) a bond in a form and with a surety reasonably
satisfactory to Landlord providing for payment to Landlord of amounts that may
become payable to Landlord under this Lease from time to time; or (vi) such
other form of security or deposit as may be mutually acceptable. Developer may
change the form of the deposit from time to time, at its option, to any other of
the permitted forms of deposit.  The deposit, if in cash or certified or
cashier's check shall be deposited in an interest bearing account of Landlord in
a bank, savings and loan association or trust company selected by Developer and
approved by Landlord, which approval shall not unreasonably be withheld.
Developer shall have the right to specify the type of account in which such
funds are, from time to time, to be deposited.  Provided that no default has
occurred during the term of the Lease which has resulted in a forfeiture by
Developer of all or a part of the good faith or security deposit, such deposit,
or any portion thereof which has not been forfeited, shall be returned to
Developer upon expiration of this Lease.

          16.1.3  Interest.  Landlord shall be under no obligation to pay or
                  --------
          earn interest on the deposit, but

                                      93
<PAGE>
 
          if interest shall accrue or be payable thereon such interest, when
          received by Landlord, shall be promptly paid to Developer. Landlord
          agrees, but not more often than quarterly, upon receipt of a request
          from Developer, to cause any such interest so accrued on such deposit
          to be paid to Developer by the bank, savings and loan association or
          trust company with which said sums have been deposited.

                   16.1.4  If Bond is Posted.  If a bond is posted to satisfy
                           -----------------
          the requirements of this Lease with a fixed term and if such bond
          expires prior to the date Developer is entitled to have the security
          deposit returned, Developer shall provide Landlord with either (i)
          evidence of the renewal of such bond for an additional period, or (ii)
          a new security deposit satisfying the requirements of subsection 16.1
          in one of the forms authorized by such subsection, including, without
          limitation, a new bond, not less than twenty (20) days prior to the
          expiration of the bond posted to satisfy the requirements in
          subsection 16.1 above.

              16.2  Construction Security Deposits.  Developer has, prior to the
                    ------------------------------
execution and delivery of this Lease, delivered to Landlord a construction
deposit in the amount of One Million and No/100 Dollars ($l,000,000.00) as
security for the performance of the obligations of Developer to be performed in
accordance with the provisions of this Lease.  The receipt of the deposit is 
hereby acknowledged by Landlord. The parties acknowledge that Two Hundred 
Ninety-Five Thousand Four Hundred Twenty-Eight and 97/100

                                      94
<PAGE>
 
Dollars ($295,428.97) of such construction security deposit shall be allocated
to and held by Landlord pursuant to this Lease.

                   16.2.1  Form of Construction Deposit.  The construction
                           ----------------------------
          deposit, at the option of Developer, may be in the form of (i) cash;
          or (ii) cashier's or certified check; or (iii) negotiable certificates
          of deposit issued by a federal or state bank or savings and loan
          association; or (iv) an irrevocable letter of credit in favor of
          Landlord issued by an established lending institution approved by
          Landlord; or (v) other form of security or deposit as may be mutually
          acceptable. Developer may change the form of the deposit from time to
          time, at its option, to any other of the permitted forms of deposit.
          The deposit, in cash or certified or cashier's check shall be
          deposited in an interest bearing account of Landlord in a bank,
          savings and loan association or trust company selected by Developer
          and approved by Landlord, which approval shall not unreasonably be
          withheld. Developer shall have the right to specify the type of
          account in which such funds are, from time to time, to be deposited.

                   16.2.2  Interest.  Landlord shall be under no obligation to
                           --------
          pay or earn interest on the deposit, but if interest shall accrue or
          be payable thereon, such interest, when received by Landlord, shall be
          promptly paid to Developer. Landlord agrees, but not more often than
          quarterly upon receipt of a request from Developer to cause any such
          interest so accrued on such deposit

                                      95
<PAGE>
 
to be paid to Landlord by the bank, savings and loan association or trust
company with which said sums have been deposited.

                   16.2.3 Incorporation by Reference. Any bond obtained by
                          --------------------------
Developer shall incorporate by reference this Lease and all of its terms and
conditions. For purposes of such bonds, no requirement of this Lease may be
deemed waived. Waiver may be accomplished only by Landlord and only in writing
by the City Manager or his duly authorized representative.

                   16.2.4 Return of Deposit. Promptly upon Developer's
                          -----------------
completion of the construction of any building improvements upon the Premises
and the issuance of a Certificate of Occupancy for such improvements, Landlord
shall release and return to Developer a portion of the deposit described in
subsection 16.2 based upon the proportion of the number of square feet of
building area (as measured from the exterior of exterior building walls) within
such completed building improvements and to 396~058 square feet of building
area. If Developer is not in default under this Lease, the balance of such
deposit, if any, with accrued interest shall be returned to Developer upon the
occurrence of the Completion Date as specified in this Lease.

                   16.2.5 Retention of Deposit by Landlord. In the event that
                          --------------------------------
this Lease is terminated by Developer, in whole or in part, under subsection
17.5 below, or in the event that Developer elects not to permit Land-

                                      96
<PAGE>
 
          lord to terminate this Lease by reason of Developer's failure to
          commence and complete the construction of building improvements upon
          the Premises as required by this Lease, said deposit, less interest
          accrued thereon through the date of such termination and also less an
          portion of such deposit to be returned to Developer under subsection
          16.2.4 above, shall be retained by Landlord as provided in subsection
          17.5 below.



          17.  GENERAL PROVISIONS:
               ------------------

               17.1  Notices, Demands and Communications between the Parties.
                     -------------------------------------------------------
Written notices, demands, and communications between Landlord and Developer
shall be in writing and shall be sufficiently given if personally served or if
mailed by registered or certified mail, postage prepaid, return receipt
requested, to the principal offices of Landlord or Developer, set forth in
subsection 1.5 of this Lease. Any such notice, demand or communication so given
by mailing to Landlord shall be mailed to the attention of the City Manager.
Copies of any such notice, demand or communication to be given to Developer
pursuant to this Lease shall be given to Kilroy Long Beach Associates,
Attention, President such other entity, person or persons as he may designate,
by personal service or by mailing the same, as required by this subsection, to
such party, at the address set forth in subsection 1.5 above or such other
address as may be designated. Either Landlord or Developer may from time to time
by written notice to the other designate a different address or addresses or
party or parties to whom copies of notices, demands and communications are 

                                      97
<PAGE>
 
to be delivered or to whose attention notices, demands and communications are to
be addressed which shall be substituted for the addresses and/or names above
specified. Notices shall be deemed served effective immediately if personally
served and effective as of the date received and set forth on the return receipt
if served by registered or certified mail.

          17.2  Conflict of Interest.  No member, official or employee of
                --------------------
Landlord shall have any personal interest, direct or indirect, in this Lease,
nor shall any such member, official or employee participate in any decision
relating to this Lease which affects his personal interest or the interest of
any corporation, partnership or association in which he is, directly or
indirectly, interested.  No member, official or employee of Landlord shall be
personally liable to Developer, or any successor in interest, in the event of
any default or breach by Landlord or for any amount which may become due to
Developer or successor or on any obligations under the terms of this Lease.

          17.3  Enforced Delay: Extension of Time of Performance.  In addition
                ------------------------------------------------     
to other provisions of this Lease, performance by either party hereunder, shall
not be deemed to be in default where delays or defaults are unavoidable or
performance is rendered impracticable, due to war; enemy action; insurrection;
civil disturbance; strikes; lock-outs; riots; floods; earthquakes; fires;
casualties; acts of God; acts of the public enemy; epidemics; quarantine
restrictions; freight embargoes; lack of transportation; governmental
restrictions or moratoria; failure or inability to secure materials or labor by
reason of regulations or order of any governmental entity; litigation in-

                                      98
<PAGE>
 
cluding eminent domain proceedings or related legal proceedings; acts or
failure to act of the other party; acts or failure to act of any public or
governmental agency or entity; and the time for such performance shall be
extended for a period equal in length to such delay(s).

          17.4  Inspection of Books and Records.  Landlord has the right at all
                -------------------------------
reasonable times during regular business hours to inspect the books and records
of the Developer pertaining to the Premises as pertinent to the purposes of this
Lease. Developer also has the right at all reasonable times during regular
business hours to inspect the books and records of the Landlord pertaining to
the Premises as pertinent to the purpose of this Lease.

          17.5  Defaults and Remedies.
                ---------------------
                17.5.1  Defaults - General.  Subject to the extensions of
                        ------------------
          time set forth in subsection 17.3 above, failure by either party to
          perform any term or provision of this Lease constitutes a default
          under this Lease, if not cured within thirty (30) days from the date
          of receipt of a written notice from the other party specifying the
          claimed default provided that if such default cannot reasonably be
          cured within such thirty (30) day period, the party receiving such
          notice of default shall not be in default under this Lease if such
          party commences the cure of such default within such thirty (30) day
          period and thereafter diligently prosecutes the steps to cure such
          default to completion.

                17.5.2  Institution of Legal Actions.  In
                        ----------------------------

                                      99
<PAGE>
 
addition to any other rights or remedies, either party may institute legal
action to cure, correct, or remedy any default, to recover damages for any
default, or to obtain any other remedy consistent with the purpose of this
Lease.  Such legal actions must be instituted in the South Branch of the
Superior Court of the County of Los Angeles, State of California, in an
appropriate municipal court in that county, or in the Federal District Court in
the Central District of California. The prevailing party in any action commenced
pursuant to this Lease shall be entitled to recover reasonable costs, expenses
and attorneys' fees.

          17.5.3  Applicable Law.  The laws of the State of California shall
                  --------------
govern the interpretation and enforcement of this Lease.

          17.5.4  Service of Process.  In the event any legal action is
                  ------------------
commenced by Developer, against Landlord, service of process on Landlord shall
be made by personal service upon the City Clerk of the Landlord, or in such
other manner as may be provided by law. 

                  In the event that any legal action is commenced by Landlord
against Developer, service of process on Developer shall be made as provided by
law and shall be valid whether made within or without the State of California,
or in such manner as may be provided by law.

          17.5.5  Rights and Remedies Are Cumulative. Except as otherwise
                  ----------------------------------
expressly stated in this Lease, the

                                      100
<PAGE>
 
rights and remedies of the parties are cumulative, and the exercise by either
party of one or more of such rights or remedies shall not preclude the exercise
by it, at the same or different times, of any other rights or remedies for the
same default or any other default by the other party.

         17.5.6  Inaction Not a Waiver of Default.  Any failures or delays by
                 --------------------------------
either party in asserting any of its rights and remedies as to any default shall
not operate as a waiver of any default or of any such rights or remedies or
deprive either such party of its right to institute and maintain any actions or
proceedings which it may deem necessary to protect, assert or enforce any such
rights or remedies.

         17.5.7  Remedies.  In the event of a default by Developer, which is not
                 --------
cured by Developer within the times specified in this Lease, Landlord, without
further notice to Developer, may declare this Lease and/or Developer's right of
possession at an end and may reenter the Premises by process of law, in which
event, Landlord shall have the right to recover from Developer:

              17.5.7.1  The worth at the time of award of the unpaid Ground Rent
     which has been earned at the time of termination, plus interest;

              17.5.7.2  The worth at the time of award of the amount by which
     the unpaid Ground Rent which would have been earned after termination until
     the 

                                      101
<PAGE>
 
     time of award exceeds the amount of such rental loss that Developer
     proves could have been reasonably avoided, plus interest;

              17.5.7.3  The worth at the time of award of the amount by which
     the unpaid Ground Rent for the balance of the term after the time of award
     exceeds the amount of such rental loss for the same period that Developer
     proves could be reasonably avoided, plus interest thereon; and

              17.5.7.4  The remedies of Landlord as hereinabove provided are
     subject to the other provisions of this Lease, including Section 4 hereof.

         17.5.8  Developer's Rights.  Developer shall have the right to
                 ------------------
challenge the correctness of any determination of default made by Landlord, and
Landlord shall carefully review and consider Developer's challenge.

         17.5.9  Lease Termination.  Should governmental action or failure to
                 -----------------
act preventing construction in accordance with this Lease or rendering it
impossible, occur prior to the time that Developer has constructed any building
upon the Premises, then Developer shall have the right, at its option, with the
prior written approval of any lender which has a security interest in the
Leasehold Estate, to cancel and terminate this Lease by giving written notice of
such termination to Landlord, at any time prior to the construction of a
building upon the Premises. Upon any such termination
                                      102
<PAGE>
 
of this Lease, Developer and Landlord shall execute and record a quitclaim deed
sufficient to remove the cloud of this Lease and the short form of this Lease
from record title to the Premises and the deposits described in subsections 16.1
and 16.2, plus any interest accrued on such deposits, shall be paid to Developer
by Landlord.

          17.5.10  Landlord's Exercise of Remedies.  In the event of an uncured
                   -------------------------------
default by Developer in the performance of any of its obligations to commence
and complete the construction of the initial building within the times required
by Section 7 of this Lease and in the further event that Landlord elects to
exercise its remedy to terminate this Lease by reason of such default by
Developer, Developer may, for a period of thirty (30) days following its receipt
of written notice from Landlord of Landlord's election to terminate this Lease
by reason of such default, elect to prevent such termination from becoming
effective by releasing and paying to Landlord a portion of the good faith
deposit held by Landlord under subsection 16.1, which portion shall be equal to
the lesser of (i) the amount of such deposit so held by Landlord; or (ii) an
amount equal to the product of One and One-half Dollar ($1.50) per square foot
times the number of square feet of building area the failure to commence or
complete the construction of which has caused the subject default or the
adjusted rent per square foot if this provision becomes operative after any
rental adjustment.

                                      103
<PAGE>
 
         17.5.11  Payment to Developer.  In the event that this Lease is
                  --------------------
terminated as a result of an uncured default by Landlord and in the further
event that Developer has constructed streets, utilities and/or other off-site
improvements or grading improvements upon or in relation to the Project prior to
such termination of this Lease, Landlord shall, pursuant to its responsibilities
under State law, use its best efforts to resell or relet the Premises, or any
portion thereof, as soon and in such manner as Landlord shall find feasible and
consistent with the objectives of such law to a qualified and responsible party
or parties (as reasonably determined by Landlord) who will assume the obligation
of making or completing the improvements required of Developer under this Lease,
or such other improvements in their stead as shall be satisfactory to Landlord
and in accordance with the uses specified for the Premises in this Lease.  Upon
such resale or reletting of the Premises, or any portion thereof, the proceeds
thereof shall be applied:

            17.5.11.1  Reimbursement to Landlord. First, to reimburse Landlord
                       -------------------------    
     for all costs and expenses incurred, including, but not limited to,
     salaries to personnel in connection with the recapture, management, and
     resale or reletting of the Premises, or part thereof (but less any income
     derived by Landlord from the Premises, or part thereof, in connection with
     such management); all

                                      104
<PAGE>
 
              taxes, assessments and water and sewer charges paid with respect
              to thePremises, or part thereof; any payments made or which are
              necessary to be made to discharge any encumbrances or liens
              existing on the Premises, or part thereof, at the time or
              revesting of title thereto in Landlord or to discharge or prevent
              from attaching any subsequent encumbrances or liens due to
              obligations, defaults or acts of Developer, its successors or
              transferees; any expenditures made or obligations incurred with
              respect to the making or completion of the improvements or any
              part thereof on the Premises, or part thereof; and any amounts
              otherwise owing Landlord by Developer and its successor or
              transferee;

                        17.5.11.2 Reimbursement to Developer. Second, to
                                  --------------------------
              reimburse Developer, its successors or transferees, a sum up to
              the amount equal to the sum of (i) the costs incurred for the
              development of the Project, prorated to the Premises, if the
              Premises are less than all of the Project, on a square foot basis,
              and for the improvements existing on the Premises at the time of
              the re-entry and repossession by Developer, less (ii) any gains or
              income withdrawn or made by Developer from the Premises or the
              improvements thereon; provided however, that no payment shall be
              made to Developer if this Lease is terminated as a result of an
              uncured default by Developer.

                                      105
<PAGE>
 
                        17.5.11.3  Ground Rent.  Third, in the case of a
                                   -----------
              reletting, to pay to Landlord an amount equal to the Ground Rent
              and other payments payable to Landlord hereunder that Landlord
              would have received if this Lease had not been terminated;

                        17.5.11.4  Remaining Balance.  Any balance remaining
                                   -----------------
              after such reimbursement shall be retained by Landlord as its
              property.  In the event that such street, utility and/or other
              off-site improvements have been constructed by or the costs of
              such construction were paid or reimbursed by an improvement or
              special assessments district, the provisions of this subsection
              shall be applicable to the costs for such improvements if payment
              of the bonds issued by such district have been guaranteed by
              Developer or are secured by security, in addition to the Leasehold
              Estate created hereby, or paid by Developer, but only to the
              extent of such payment by Developer or of payment from the
              proceeds of such guarantee or security.

                        17.5.12  Delivery of Plans.  In the event that this 
                                 -----------------
              Lease is terminated, for any reason whatsoever, Developer shall
              deliver to Landlord one set of all plans and data in its
              possession concerning the Premises.

              17.6  Right to Contest Laws.  Developer shall have the right, 
                    ---------------------
after notice to Landlord to contest or to permit its subtenants to contest by
appropriate legal proceedings, without

                                      106
<PAGE>
 
costs or expense to Landlord, the validity of any law, ordinance, order, rule,
regulation or requirement to be complied with by Developer under this Lease and
to postpone compliance with the same except such laws as may be adopted by
Landlord, provided such contest shall be promptly and diligently prosecuted at
no expense to Landlord and so long as Landlord shall not thereby suffer any
civil penalties, sanction or be subjected to any criminal penalties or
sanctions, and Developer shall protect and save harmless Landlord against any
liability and claims for any such noncompliance or postponement of compliance.

              17.7 Trade Fixtures. All trade fixtures, furnishings, equipment
                   --------------
and signs installed by or under Developer or subtenants shall be and remain the
property of the person, firm or corporation installing the same and shall be
removable at any time during the term of this Lease. The removal of any such
trade fixtures, furnishings, equipment and signs shall be at the expense of the
person, firm or corporation removing the same, who shall repair any damage or
injury to the Premises and all improvements thereto occasioned by the removal
thereof. In the event that any subtenant acquires any furniture, trade fixtures,
signs and/or equipment to be used in connection with its subleased premises from
an equipment lessor or from an equipment seller under a security agreement,
Landlord agrees to execute such documents as may reasonably be required by the
equipment lessor or creditor in order to assure such party of its prior rights
in and to any such equipment, furniture, signs and/or trade fixtures and of its
right to remove any such equipment, furniture, signs and/or trade fixtures from
the subleased premises for a period of

                                      107
<PAGE>
 
not to exceed forty-five (45) days from and after notice to such party of the
termination or expiration of the sublease of the subject subtenant-lessee or
subtenant-debtor.

          17.8  Continued Possession of Developer.  If Developer shall hold over
                ---------------------------------
the Premises after the expiration of the term hereof with the consent of
Landlord, either express or implied, such holding over shall be construed to be
only a tenancy from month-to-month, subject to all the covenants, Ground Rent
conditions and obligations hereof and terminable by either party as provided by
law.

          17.9  Utilities.  Developer shall pay or cause to be paid all charges
                ---------
for gas, electricity, water and other utilities furnished to the Premises during
the term of this Lease and all sewer use charges or similar charges or
assessments for utilities levied against the Premises for any period included
within the term of this Lease.

          17.10 Surrender. Upon the expiration of the term of this Lease, as
                ---------
provided herein, or sooner termination of this Lease, Developer, subject to
subsection 17.5.11 shall surrender to Landlord, all and singular, the Premises,
including any buildings and all improvements constructed by or under Developer
then situated upon the Premises, and Developer shall execute, acknowledge and
deliver to Landlord within ten (10) days after written request from Landlord to
Developer, a Quitclaim Deed or other document required by any reputable title
company to remove the cloud of this Lease from the Premises. Notwithstanding the
foregoing provisions of this section to the contrary, Developer shall have the
right, at any time not less than six (6) months 

                                      108
<PAGE>
 
prior to the expiration of the term of this Lease and for a period of sixty (60)
days following the expiration of the term to remove all or any portion of the
buildings and other improvements constructed by or under Developer upon the
Premises, without obligation to replace the same with new buildings and/or other
improvements as required by subsection 6.3 above.

          17.11  Partial Invalidity.  If any term or provision of this Lease or
                 ------------------
the application thereof to any party or circumstances shall, to any extent, be
held invalid or unenforceable, the remainder of this Lease, or the application
of such term or provision, to persons or circumstances other than those as to
whom or which it is held invalid or unenforceable, shall not be affected
thereby, and each term and provision of this Lease shall be valid and
enforceable to the fullest extent permitted by law.

          17.12  Section Headings. The section and subsection headings of this
                 ----------------
Lease are inserted as a matter of convenience and reference only and in no way
define, limit or describe the scope or intent of this Lease or in any way affect
the terms and provisions hereof.

          17.13  Short Form Lease.  Concurrently with the execution and delivery
                 ----------------
of this Lease, Landlord and Developer have executed, acknowledged and caused to
be recorded a short form of this Lease in the form attached hereto as Exhibit
"M".

          17.14 Exhibits Incorporated. Exhibit "A" is hereby incorporated in
                ---------------------
this Lease. No other exhibit is incorporated in the Lease and all exhibits,
other than Exhibit "A", may be changed or modified by agreement between Landlord
and Developer 

                                      109
<PAGE>
 
at any time and from time to time without amending this Lease.

          17.15  Entire Agreement, Waivers and Amendments. This Lease is
                 ----------------------------------------
executed in three (3) triplicate originals, each of which is deemed to be an
original.  It constitutes the entire understanding and agreement of the parties.
This Lease integrates all the terms and conditions mentioned herein or
incidental hereto, and supersedes all negotiations or previous agreements
between the parties with respect to all or any part of the subject matter
hereof.

          17.16  Waivers.  All waivers of the provisions of this Lease must be
                 -------
in writing by the appropriate authorities of Landlord or Developer, and all
amendments hereto must be in writing by the appropriate authorities of Landlord
and Developer.

          17.17  Approvals.  Except where specific criteria are set forth as a
                 ---------
condition to approving or disapproving or a matter of course of action,
including but not limited to assignment (subsection 5.4), and subletting
(subsection 5.7.2), in all circumstances where under this Lease either party is
required to approve or disapprove any matter, such approval shall not be
unreasonably withheld.

          17.18  Successors in Interest.  The provisions of this Lease shall be
                 ----------------------
binding upon and shall inure to the benefit of the heirs, executors, assigns and
successors in interest of the parties hereto.

          17.19  "And/Or".  Whenever the words and symbols "and/or" are used in
                 --------
this Lease, it is intended that this Lease be interpreted and the sentence,
phrase or other part be considered in both its conjunctive and disjunctive
sense, and as

                                      110
<PAGE>
 
having been written twice, once with the word "and" inserted, and once with the
word "or" inserted, in the place of said words and symbol "and/or".

          17.20  "Including" Defined.  The use of the word "including", or
                 -------------------
"include", when followed by any general statement, term or matter, will not be
construed to limit such statement, term or matter to the specific items or
matters set forth immediately following such work or to similar items, terms or
matters, but rather will be deemed to refer to all other items, terms or matters
that could reasonably fall within the broadest possible scope of such general
statement, term, item or matter.

          17.21 Right of First Refusal to Purchase. If Landlord shall determine
                ----------------------------------
during the term of this Lease that it is lawful and in the public interest to
sell the Premises, or any portion thereof, Landlord shall, prior to making the
Premises or part thereof available for sale to any other party, provide
Developer with the opportunity to purchase said property at its fair market
value, as determined by an appraisal obtained by Landlord. If Developer has not
entered into an agreement to purchase said property within sixty (60) days of
the date it is first offered for sale to Developer at the price theretofore
determined by Landlord to be the fair market value, Landlord may offer the
property for sale on the open market. Provided, however, that if Landlord should
reduce the fair market value of the Premises or part thereof to be sold by seven
and one-half percent (7.5%) or more,' Developer's first refusal rights shall be
reinstated. Developer shall respond to any such re-offer within five (5)
business days, and if Developer fails to respond within 

                                      111
<PAGE>
 
that time period Developer's first refusal rights shall terminate. The
determination whether such property shall be made available for sale is and
shall be within the sole and exclusive discretion of Landlord. Landlord shall
determine the legality of such action prior to making a determination to sell on
the basis of the law then in effect.

          17.22  If Developer is a Trustee.  If Developer is a Trustee, this
                 -------------------------
Lease is executed by the undersigned Trustee, not personally, but solely as
Trustee, and it is expressly understood and agreed by the parties hereto,
anything contained herein to the contrary notwithstanding, that each and all of
the covenants, undertakings, representations and agreements herein made are
intended, not as personal covenants, undertakings, representations and
agreements of the Trustee, individually, or for the purpose of binding the
Trustee personally, but this Lease is executed and delivered by the Trustee
solely in the exercise of the powers conferred upon the Trustee as such Trustee
under the trust agreement and no personal liability or personal responsibility
is assumed by, nor shall at any time be asserted or enforced against said
Trustee on account hereof, or on account of any covenant, undertaking,
representation, warranty or agreement herein contained, either expressed or
implied, and all such personal liability, if any, being hereby expressly waived
and released by the parties hereto, and by all persons claiming by or under said
parties.  The provisions of this subsection 17.22 shall apply to any Trustee
succeeding in whole or in part to the interests of Developer hereunder.

          17.23 Limitation of Liability of Partners. From 
                -----------------------------------

                                      112
<PAGE>
 
and after the completion of the construction of the improvements described in
this Lease, if Developer at any such time shall be a partnership or joint
venture, Landlord shall look solely to the assets of such partnership or joint
venture for the collection or satisfaction of any money judgment which Landlord
may recover against Developer, and Landlord shall not look for the collection or
satisfaction of any such judgment to the personal assets of any person who shall
at any time be a partner, joint venturer or participant in or under any such
partnership or joint venture. The provisions of the subsection shall be binding
upon Landlord and each and every future owner of Landlord's interest under this
Lease and shall insure to the benefit of each and every such partner, joint
venturer and participant.

          17.24  Approvals.  Except as otherwise specifically provided in this
                 ---------
Lease, all approvals to be done by Landlord may be done by Landlord's City
Manager or his designee.



          IN WITNESS WHEREOF, Landlord and Developer have signed this Lease as
of the date opposite their signature.
                                    
                                        CITY OF LONG BEACH, a municipal 
                                        corporation


   December 30   , 1988                 By:   [Signature appears here]    
- -----------------                          ------------------------------
                                                     City Manager


                                        LANDLORD


                                        / /

                                        / /

                                        / /

                                        / /

                                      113
<PAGE>
 
                                        KILROY LONG BEACH ASSOCIATES, a
                                        California limited partnership


                                        By:  KILROY INDUSTRIES,
                                             General Partner


December 21, 1988                       By: /s/ Marshall L. McDaniel 
- ------------                               -------------------------------
                                                Marshall L. McDaniel
                                              Senior Vice President and
                                                      Secretary

                                        DEVELOPER


      This Lease Agreement is approved as to form this 22 day of December, 1988.
                                                       --        --------

                                        JOHN R. CALHOUN, City Attorney

                                       
                                        By: [SIGNATURE APPEARS HERE]
                                            ------------------------
                                                     Deputy

                                      114
<PAGE>
 
                           DEVELOPER'S ACKNOWLEDGMENT
                           --------------------------


STATE OF CALIFORNIA    )
                       ) SS.
COUNTY OF LOS ANGELES  )


     On December 21, 1988, before me, the undersigned, a Notary Public in and
for said State, personally appeared Marshall L. McDaniel, personally known to me
or proved to me on the basis of satisfactory evidence to be the person that
executed this instrument as Senior Vice President of Kilroy Industries, the
corporation that executed this instrument as the general partner of Kilroy Long
Beach Associates, a California Limited Partnership, the partnership that
executed the within instrument, and acknowledged to me that such corporation
executed the same as such partner and that said partnership executed the same.

     WITNESS my hand and official seal. 

[Seal]

                                            /s/ Nadine K. Kirk
                                           ------------------------------------
                                           Notary Public in and for said State
<PAGE>
 
                               LEGAL DESCRIPTION
                               -----------------

Parcels 5 and 6 in the City of Long Beach, County of Los Angeles, State of
California, as shown on Parcel Map No. 16960, filed in Book 208, pages 92
through 100, of Parcel Maps in the Office of the County Recorder of said County.




                                 EXHIBIT "A" 

                               Page 1 of 1 Page
<PAGE>
 
                              MAP OF PROJECT AREA

                              ADJACENT PROPERTIES

                                   EXHIBIT B


                              [MAP APPEARS HERE]


                 [LOGO OF KILROY AIRPORT CENTER APPEARS HERE]

                                                    [GRAPHIC SCALE APPEARS HERE]
<PAGE>
 
                                     MAP OF

                             PARCELS 1 THROUGH 10 

                             PARCEL MAP NO. 16960

                             P.M.B. 208 - 92/100 

                          IN THE CITY OF LONG BEACH 

                             COUNTY OF LOS ANGELES

                             STATE OF CALIFORNIA 

                              FOR LEASE PURPOSES

                                  EXHIBIT "C"


                  [MAP OF PARCELS 1 THROUGH 10 APPEARS HERE]

<PAGE>
 
                       KILROY AIRPORT CENTER LONG BEACH
                       CATEGORIES OF PRE DEVELOPMENT AND
                             INFRASTRUCTURE COSTS
                 (DURING AND RELATED TO INITIAL CONSTRUCTION 
                     WHICH MAY BE ACCOMPLISHED IN PHASES)


Note:  Exhibit "D" consists of a map and the following text.

1.  FEES
    1.1  Filing Fees
    1.2  Inspection Fees
    1.3  Plan Check & Permits
    1.4  Sewer Area Fees
    1.5  Flood Control Fees
    1.6  Recording Fees
    1.7  Other Fees

2.  GENERAL
    2.1  Legal & Audit Fees
    2.2  Bonds
    2.3  Insurance
    2.4  Taxes & Assessments During Construction
    2.5  Laboratory Testing
    2.6  Unusual or Temporary Security
    2.7  Utilities During Construction
    2.8  Prints and Other Direct Costs

3.  SITE INVESTIGATION
    3.1  Survey and Parcel Map
    3.2  Title Report
    3.3  Borings
    3.4  Soil Tests

4.  ARCHITECTURE AND ENGINEERING
    4.1  Site Planning
    4.2  Civil Engineering
    4.3  Electrical Engineering
    4.4  Mechanical Engineering
    4.5  Traffic Study
    4.6  Signal Engineering
    4.7  Landscape Architecture
    4.8  Structural Engineering
    4.9  Water Department Specifications

5.  DEMOLITION
    5.1  Utilities
    5.2  Temporary Service to Adjacent Sites
    5.3  NIKE Bunkers
    5.4  Surface Buildings
    5.5  Asphalt Paving
    5.6  Concrete Slabs
    5.7  Fencing
    5.8  Allowance for Underground Items


                                  EXHIBIT "D"
                               Page 1 of 4 Pages
<PAGE>
 
6.  SITE PREPARATION
    6.1   Relocate Existing Signs
    6.2   Temporary Construction Fences
    6.3   Testing for Hazardous Materials
    6.4   Allowance for Unforseen Site Conditions
    6.5   National Guard Accesses

7.  EXCAVATION AND GRADING
    7.1   Grub and Rough Grade
    7.2   Remove and Recompact
    7.3   Scarify and Recompact
    7.4   Import Fill, Compact and Grade
    7.5   Fine Grade Street Easement

8.  SEWERS
    8.1   Sewer Mains, Approximate Sizes
        8.1.1  18" Main
        8.1.2  8" Main
    8.2   Lateral Stub Outs to Interior Edge of
            Sidewalk Easement
    8.3   Manholes
    8.4   Join Existing Sewer

9.  STORM DRAINS
    9.1  Main Storm Drains, Approximate Sizes
        9.1.1  33" Main
        9.1.2  30" Main                            
        9.1.3  27" Main                            
        9.1.4  24" Main                            
        9.1.5  18" Main                             
    9.2   Catch Basins
    9.3   Lateral Stub Outs to Interior Edge of
            Sidewalk Easement
    9.4   Manholes
    9.5   Erosion Control on Parcels

10. WATER, APPROXIMATE SIZES
    10.1  12" Water Main
    10.2  Vaults and Lateral Stubs Outs to Interior Edge of
            Sidewalk Easement
    10.3  Hot Taps
    10.4  12" Valves
    10.5  Blow Off Valve
    10.6  Air Evacuation Assembly
    10.7  Fire Hydrants
    10.8  Irrigation Backflow Preventers
    10.9  Service Connections
    10.10 Relocate Surge Tank
    10.11 Relocate Existing Meters


                                  EXHIBIT "D"
                               Page 2 of 4 Pages
<PAGE>
 
11. ELECTRICAL
    11.1     Six Main Conduits, Approximately 5"
    11.2     Lateral Stub Outs to Interior Edge of
               Sidewalk Easement
    11.3     Irrigation Transformer Vaults
    11.4     Manholes

12.  GAS
    12.1     Gas Main
    12.2     Lateral Stub Outs to Interior Edge of 
               Sidewalk Easement
    12.3     Valves
    12.4     Engineering

13. TELEPHONE
    13.1     Ten Main Conduits, Approximately 4"
    13.2     Lateral Stub Outs to Interior Edge of
               Sidewalk Easement
    13.3.    Manholes

14. PERIMETER WALLS & FENCES
    14.1     8'4" Screen Wall
    14.2     Remove Temporary Fences
    14.3     Chain Link Security Fence

15. STREET IMPROVEMENTS
    15.1    Intersection at Spring and KAC Drive
         15.1.1  Curb Demolition
         15.1.2  Asphalt Paving Demolition
         15.1.3  Excavation
         15.1.4  Retaining Wall
         15.1.5  Back Fill
         15.1.6  Curb and Gutter
         15.1.7  Asphalt Paving
         15.1.8  Traffic Signal
         15.1.9  Restriping
    15.2   Intersection at Redondo and KAC Drive
         15.2.1  Curb Demolition
         15.2.2  Asphalt Paving Demolition
         15.2.3  Curb and Gutter
         15.2.4  Asphalt Paving
         15.2.5  Traffic Signal
    15.3   Intersection at Spring and Redondo
         15.3.1  Modify Traffic Signal
    15.4   Kilroy Airport Center Drive
         15.4.1  Curb and Gutter
         15.4.2  Asphalt Street Paving
         15.4.3  Crosswalk Pavers
         15.4.4  Concrete Sidewalks
         15.4.5  Curb
         15.4.6  Street Lights

                                  EXHIBIT "D"

                               Page 3 of 4 Pages
<PAGE>
 
16. SIGNS
    16.1   Street Name Signs
    16.2   Stop Signs

17. LANDSCAPE IN THE AREAS SHOWN ON THE ATTACHED DRAWING
    17.1   Soil Preparation & Fine Grading         
    17.2   Finish Grading                          
    17.3   Irrigation                              
    17.4   Trees, Approximate Size                  
         17.4.1 72" Box                              
         17.4.2 60" Box                              
         17.4.3 48" Box                              
         17.4.4 36" Box                               
    17.5   Hedges/Shrubs, Approximate Size
         17.5.1  15 Gallon
         17.5.2  5 Gallon
         17.5.3  1 Gallon
    17.6   Sodded Turf/Ground Cover
    17.7   Landscape Curb or Similar Separation Between 
             Landscaped Areas and Undeveloped Portions of Parcels 
             at Perimeter of Site

18. MISCELLANEOUS
    18.1   Developer Overhead and Supervision (6%)
    18.2   Burden
    18.3   Contingency


    NOTE:  Specific sizes referenced above are estimates only as of the date of
           the Ground Lease and are subject to change based upon final
           engineering.

    NOTE:  Specialty contractor and subcontractor overhead and supervision shall
           be included in each individual line item cost.

    NOTE:  Developer's Overhead & Supervision (item 18.1) applies whether
           Developer is the developer or is the Construction Manager (if the
           City of Long Beach causes the work to be performed).


                                  EXHIBIT "D"

                               Page 4 of 4 Pages
<PAGE>
 
                                                    PRE DEVELOPMENT &     
                                                    -----------------     
                                              INFRASTRUCTURE LANDSCAPE AREA 
                                              -----------------------------
                                                        EXHIBIT D         
                                                        ---------          

                   [MAP OF LONG BEACH AIRPORT APPEARS HERE]
<PAGE>
 
                               PRE DEVELOPMENT &
                               -----------------
                         INFRASTRUCTURE LANDSCAPE AREA
                         -----------------------------
                                   EXHIBIT D
                                   ---------



                   [MAP OF LONG BEACH AIRPORT APPEARS HERE]
<PAGE>
 
                          AGREEMENT OF NON-DISTURBANCE
                          ----------------------------          


     THIS AGREEMENT is made as of the ______ day of _________, 198__, by and
among the CITY OF LONG BEACH, a Municipal Corporation (hereinafter called
"Landlord"); KILROY LONG BEACH ASSOCIATES, a California Limited Partnership,
(hereinafter called "Developer"); and ___________________________________
(hereinafter called "Subtenant")

                                  PRELIMINARY
                                  -----------

     A. Landlord and Developer have entered into a Lease Agreement dated
___________ (hereinafter referred to as the "Ground Lease") pursuant to which
Landlord has demised and leased to Developer certain real property located in
the City of Long Beach, County of Los Angeles, State of California, including
the real property described in Exhibit "A" attached hereto and incorporated
herein. A short form of the Ground Lease was recorded ___________________, 198__
in the Official Records of said County.


     B. Developer, as Sublandlord, and Subtenant, as subtenant, have entered
into a Sublease dated _________________, 198__, (hereinafter referred to as the
"Sublease") which Sublease demises to Subtenant a portion of the premises 
demised by the Ground Lease (and grants to Subtenant certain rights with respect


                                 EXHIBIT "E" 
                               Page 1 of 7 Pages
<PAGE>
 
to other portions of the premises demised by the Ground Lease). A short form of
the Sublease is being recorded concurrently herewith in the Official Records of
said County, which short form of Sublease describes the premises demised thereby
(and the other rights and obligations of Subtenant with respect to the real
property described in the attached Exhibit "A").


    C.  The parties hereto now desire to enter into this Agreement so as to
clarify their rights, duties and obligations under the Ground Lease and the
Sublease and to further provide for various contingencies as hereinafter set
forth.


    NOW THEREFORE, in consideration of the foregoing and of the mutual agreement
of the parties hereto to the terms and conditions hereinafter contained, the
parties hereto agree as follows:


    1.  In the event Developer shall default in the payment of any sum or in the
performance of any covenant or condition of the Ground Lease, all as provided
therein, or in the event of any termination or expiration of the Ground Lease
for any reason whatsoever prior to the expiration of the term of the Sublease as
provided in the Sublease (other than a termination of the Ground Lease only as
to portions of the premises demised thereby not described in the attached
Exhibit "A"), then Landlord, Developer and Subtenant do hereby agree that the
Sublease, and all terms, provisions, covenants and agreements thereof shall
survive any



                                 EXHIBIT "E" 
                               Page 2 of 7 Pages
<PAGE>
 
such default or defaults in, or termination or expiration of the Ground Lease,
whether such termination occurs as a result of, or arising out of, any such
default or defaults, or otherwise, and the Sublease (subject to the rights of
any Leasehold Mortgagee, as defined in the Ground Lease, to enter into a New
Lease with Landlord upon the same terms and conditions and having the same
priority as the Ground Lease, pursuant to subsection 4.8 of the Ground Lease)
shall continue in force and effect in accordance with and subject to all of its
terms, provisions, agreements and covenants as a direct lease with Landlord, as
landlord, and Subtenant, as lessee.  Subtenant agrees, in such event, to attorn
to Landlord and to recognize Landlord as the landlord under the Sublease.
Landlord shall, in such event, exercise and undertake all of the rights,
obligations and duties of Developer in and under said Sublease and thereafter
shall be entitled to collect all rents and payments due and payable under said
Sublease, including the right to collect any sums being due and payable
thereunder prior to the termination or expiration of the Ground Lease which are
accrued and unpaid by Subtenant on the date of termination of the Ground Lease.
Subtenant agrees not to prepay rentals under the Sublease beyond the amounts
provided in the Sublease without the prior written consent of Landlord.

    2.  Landlord agrees that, prior to terminating the Ground Lease or taking
any proceedings to enforce any such termination thereof for any reason other
than the expiration of the term of



                                  EXHIBIT "E"
                               Page 3 of 7 Pages
<PAGE>
 
the Ground Lease as provided therein, Landlord shall give Subtenant thirty C30)
days' notice in writing prior to the effective date of such termination,
specifying the reason for such termination.  Such notice shall be given to
Subtenant at the address provided in the Sublease for notices to Subtenant.
Subtenant may change such address by written notice to Landlord.

    3.  Landlord hereby approves of the Sublease and of the rights and
privileges granted to Subtenant thereunder and agrees that, far and during the
term of the Sublease and any extensions thereof, Landlord shall not take any
action, directly or indirectly, to disturb or otherwise affect Subtenant's
occupancy of and/or rights and privileges with respect to the premises demised
by the Ground Lease and described on the attached Exhibit "A" so long as
Subtenant is not in default under the Sublease nor shall Subtenant's exercise of
any such rights or privileges constitute a default under the Ground Lease,
notwithstanding any provisions to the contrary contained in the Ground Lease.

    4.  No provision contained herein shall be deemed an amendment or
modification of any provision contained in the Sublease, including, without
limiting the generality of the foregoing, any rights given thereunder to
Developer to terminate the Sublease.

    5.  In the event that the Ground Lease is divided, in accordance with its
terms, into two (2) or more New Leases or



                                 EXHIBIT "E" 
                               Page 4 of 7 Pages
<PAGE>
 
Separate Leases, the term "Ground Lease", as used herein, shall be deemed to
refer to the said New Lease or Separate Lease leasing and demising the subleased
premises.

    6.  This Agreement shall be binding upon and shall inure to the benefit of
the parties hereto and their successors, transferees and assigns.



                                  EXHIBIT "E"
                               Page 5 of 7 Pages
<PAGE>
 
    IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the day and year first hereinabove set forth.


                                       CITY OF LONG BEACH, 
                                       A Municipal Corporation

                                       By: ________________________________
                                       Title: _____________________________


                                       KILROY LONG BEACH ASSOCIATES,
                                       A California Limited Partnership


                                       By:  KILROY INDUSTRIES, a California 
                                            Corporation, General Partner


                                             By: __________________________ 
                                             Title: _______________________


                                      By: _________________________________


                                      By: _________________________________
                                                     "Developer"


                                      _____________________________________


                                      _____________________________________
                                                     "Subtenant"



                                  EXHIBIT "E"
                               Page 6 of 7 Pages
<PAGE>
 
    This Agreement is hereby approved as to form this ________ day of ________,
198__.


                                       ROBERT W. PARKIN, City Attorney


                                       BY: _____________________________________
                                                         "Deputy"



                                  EXHIBIT "E"
                               Page 7 of 7 Pages
<PAGE>
 
                               LEGAL DESCRIPTION
                               -----------------


THAT PORTION OF PARCEL 1, IN THE CITY OF LONG BEACH, IN THE COUNTY OF LOS
ANGELES, STATE OF CALIFORNIA, AS SHOWN ON A RECORD OF SURVEY, FILED IN BOOK 85,
PAGE 19, OF RECORD OF SURVEYS, IN THE OFFICE OF THE COUNTY RECORDER OF SAID
COUNTY, TOGETHER WITH THOSE PORTIONS OF LOTS 5 AND 9, TRACT NO. 10548, IN SAID
CITY, COUNTY OF STATE, AS PER MAP RECORDED IN BOOK 174, PAGES 15 TO 23,
INCLUSIVE OF MAPS, IN SAID RECORDER'S OFFICE, AND TOGETHER WITH THAT PORTION OF
LAKEWOOD BOULEVARD (FORMERLY KNOWN AS CERRITOS AVENUE, 80 FEET WIDE) AS SHOWN ON
SAID MAP OF TRACT NO. 10548, NOW VACATED BY THE STATE OF CALIFORNIA HIGHWAY
COMMISSION, A CERTIFIED COPY OF WHICH WAS RECORDED MAY 19, 1959, AS INSTRUMENT
NO. 3601, OF OFFICIAL RECORDS, IN THE OFFICE OF SAID COUNTY RECORDER, DESCRIBED
AS A WHOLE AS FOLLOWS:

BEGINNING AT THE MOST SOUTHERLY CORNER OF SAID PARCEL 1, SAID RECORD OF SURVEY;
THENCE NORTH 00 DEGREES 00 MINUTES 46 SECONDS EAST 324.60 FEET, ALONG THE
WESTERLY LINE OF SAID PARCEL 1, TO THE NORTHWESTERLY CORNER OF SAID PARCEL 1,
SAID NORTHWESTERLY CORNER BEING A POINT IN A NON-TANGENT CURVE CONCAVE NORTHERLY
AND HAVING A RADIUS OF 1,050.00 FEET, A RADIAL LINE THAT BEARS SOUTH 2 DEGREES
06 MINUTES 54 MINUTES WEST TO SAID POINT, SAID CURVE ALSO BEING THE NORTHERLY
LINE OF SAID PARCEL 1; THENCE EASTERLY ALONG SAID CURVE THROUGH A CENTRAL ANGLE
OF 27 DEGREES 32 MINUTES 10 SECONDS AN ARC DISTANCE OF 504.63 FEET TO A POINT,
SAID LAST MENTIONED POINT BEING A RADIAL LINE THAT BEARS SOUTH 25 DEGREES 25
MINUTES 16 SECONDS EAST, TO SAID LAST MENTIONED POINT; THENCE SOUTH 45 DEGREES
22 MINUTES 59 SECONDS EAST 1,403.34 FEET TO A POINT IN THAT CERTAIN COURSE AS
DESCRIBED AS HAVING A BEARING AND LENGTH OF "SOUTH 34 DEGREES 15 MINUTES 50
SECONDS WEST 225.46 FEET" IN THE NORTHWESTERLY BOUNDARY OF THAT PARCEL OF LAND
DESCRIBED AS PARCEL 1 IN DEED TO STATE OF CALIFORNIA, RECORDED MARCH 18, 1959,
AS INSTRUMENT NO. 1904, OF OFFICIAL RECORDS, OF SAID COUNTY, SAID LAST MENTIONED
POINT BEING NORTH 34 DEGREES 16 MINUTES 23 SECONDS EAST 40.81 FEET, ALONG SAID
COURSE, FROM THE SOUTHWESTERLY TERMINUS THEREOF; THENCE SOUTH 34 DEGREES 16
MINUTES 23 SECONDS WEST 40.81 FEET, ALONG SAID COURSE, TO THE NORTHEASTERLY
TERMINUS OF THAT CERTAIN COURSE IN SAID NORTHWESTERLY BOUNDARY, AS DESCRIBED
IN SAID LAST MENTIONED PARCEL 1, AS HAVING A BEARING AND LENGTH OF "SOUTH 62
DEGREES 04 MINUTES 30 SECONDS WEST, 51.05 FEET, MORE OR LESS,"; THENCE SOUTH 62
DEGREES 05 MINUTES 03 SECONDS WEST ALONG SAID LAST MENTIONED CERTAIN COURSE, TO
THE NORTHEASTERLY TERMINUS OF THAT CERTAIN COURSE AS DESCRIBED AS HAVING A
BEARING AND LENGTH OF "SOUTH 62



                           EXHIBIT "A"

                        Page 1 of 2 Pages
<PAGE>
 

                             PAGE 2 OF EXHIBIT "A"
                               IS UNAVAILABLE



<PAGE>
 
                             KILROY AIRPORT CENTER


                                  LONG BEACH


                             OFF-SITE IMPROVEMENTS



Note: Exhibit "F" consists of a map and the following text.  The numbers
preceding each paragraph in this text refer to numbers on the map which identify
the location of the improvement.


1.  STREET DEDICATION
    -----------------

Landlord shall obtain and provide to Developer, for  street improvements,
utilities, and landscaping, to be constructed by Developer to meet or exceed
City of Long Beach standards and subsequent dedication as public streets, the
easements necessary to provide access to the entire Premises on property other
than Parcel G for construction of the street tentatively identified on the map
as Kilroy Airport Center Drive, including:  (i) an area south of Spring Street
and west of Parcel G approximately 75 feet wide and approximately 420 feet long;
and (ii) an area between Parcel G and Redondo Avenue abutting the San Diego
Freeway approximately 72 feet wide and approximately 1200 feet long. Developer
shall have the right to install a landscaped divider on Kilroy Airport Center
Drive near the Spring Street intersection and to relocate existing signs and
utilities as necessary. Developer shall dedicate the land and street as
necessary on Parcel G to connect the remainder of Kilroy Airport Center Drive.



                                  EXHIBIT "F"
                               Page 1 of 7 Pages
<PAGE>
 
2.  INTERSECTION OF SPRING STREET AND KILROY AIRPORT CENTER DRIVE
    -------------------------------------------------------------

Landlord shall obtain and provide to Developer the required approvals and
easements for access and installation by Developer the following:


2.1 Widen Spring Street
    -------------------

Widening of Spring Street to the north approximately 12 feet along a length of
approximately 600 feet, including restriping, construction of a retaining wall
and landscaping as appropriate to accommodate a second left turn lane.


2.2 Second Left Turn Lane
    ---------------------

Restriping on Spring Street on the westbound approach to provide a second
exclusive left turn lane to Kilroy Airport Center Drive.


2.3 Acceleration Lane/Bus Pull Out Lane
    -----------------------------------

A lane on the south side of South Street east of Kilroy Airport Center Drive,
approximately 12 feet wide and approximately 200 feet long.


2.4 Deceleration Lane
    -----------------

A deceleration lane on the south side of Spring Street west of Kilroy Airport
Center Drive, approximately 12 feet wide and approximately 220 feet long.



                                  EXHIBIT "F"
                               Page 2 of 7 Pages
<PAGE>
 
2.5 Traffic Signal
    --------------

A three-phase traffic signal including a left turn phase for westbound Spring
Street Traffic turning from the two left turn lanes on Spring Street left onto
Kilroy Airport Center Drive.


3.  INTERSECTION OF REDONDO AVENUE AND KILROY AIRPORT CENTER DRIVE
    --------------------------------------------------------------

Landlord shall obtain and provide to Developer the required approvals and
easements for access and installation by Developer of the following:


3.1 Deceleration Lane
    -----------------

A deceleration lane on the east side of Redondo Avenue south of Kilroy Airport
Center Drive approximately 12 feet wide and approximately 100 feet long.


3.2 Regrade Embankment
    ------------------

Regrade the embankment adjoining the abuttment wall on the east side of Redondo
Avenue north of the San Diego Freeway overpass or install a retaining wall as
necessary to accommodate the deceleration lane.



                                  EXHIBIT "F"
                               Page 3 of 7 Pages
<PAGE>
 
3.3 Traffic Signal
    --------------

A traffic signal, to be contracted for when permits are issued for that building
which will result in an aggregate of 350,000 square feet, or more, so that the
signal will be operational approximately concurrently with expected traffic
demand.


3.4 Monument Sign
    -------------

A monument sign (at Developer's cost) similar to that depicted in the Basic
Concept Documents at the northeast corner of the intersection.


4.  INTERSECTION OF SPRING STREET AND REDONDO AVENUE
    ------------------------------------------------

Landlord shall obtain and provide to Developer the required approvals and
easements for access and installation by Developer of the following:


4.1 Second Left Turn Lane
    ---------------------

Restriping of Spring Street on the westbound approach to provide a second
exclusive left turn lane, when and if determined necessary by Landlord.


                                  EXHIBIT "F"
                               Page 4 of 7 Pages
<PAGE>
 
4.2 Traffic Signal Rephasing
    ------------------------

Modification of the existing traffic signal to add a left turn phase for
westbound Spring Street traffic turning from the two left turn lanes left onto
Redondo Avenue, when and if determined necessary by Landlord.


5.  SCREEN WALL
    -----------

Landlord shall obtain and provide to Developer the required easements for access
and installation by Developer of approximately 3,060 lineal feet of screen wall
starting approximately 160 feet south of the south curb line of Spring Street
between the Long Beach Water Department property and the Water Department Lease
#40 property; running north replacing the existing fence to approximately 15
feet south of the curb line; then running east approximately 200 feet parallel
to and approximately 15 feet south of the curb line; then bending to the south
approximately 12 feet; then continuing east parallel to and approximately 15
feet south of the south curb line of the new deceleration lane; then running
south replacing the existing fence along the east border of Water Department
Lease #40 property and continuing south along the east border of the Water
Department Lease #38-#39 property to the north border of the California National
Guard property; then running east approximately 110 feet with an opening in the
middle at the entrance to the California National Guard property; then running
south along the east border of the

                                  EXHIBIT "F"
                               Page 5 of 7 Pages
<PAGE>
 
California National Guard property replacing the existing fence to approximately
12 feet north of the north curb line of Kilroy Airport Center Drive; then
running west parallel to and approximately l2 feet north of the curb line; and
terminating approximately 20 feet east of the east curb line of Redondo Avenue.


6.  TEMPORARY SECURITY FENCE
    ------------------------

Landlord shall provide the required access for construction by Developer of a
temporary security fence on Airport Property approximately 25 feet east of the
east boundary of Parcel G approximately 1400 feet long from Spring Street
southeast to the existing security fence at the intersection of the San Diego
Freeway and Lakewood Boulevard.


7.  LANDSCAPE AREAS
    ---------------

Landlord shall obtain and provide to Developer the required easements for access
and installation by Developer of landscaping at the following locations:


7.1 Landscape Spring Street
    ----------------------- 

Approximately 20 feet wide and approximately 1100 feet long on the south side of
Spring Street from the west tunnel entrance proceeding west to the northwest
corner of Water Department Lease #40 property.



                                  EXHIBIT "F"
                               Page 6 of 7 Pages
<PAGE>
 
7.2 Landscape Redondo Avenue
    ------------------------

Approximately 40 feet deep and approximately 100 feet long at the northeast
corner of the intersection of Redondo Avenue and Kilroy Airport Center Drive.

7.3 Landscape Redondo Avenue
    ------------------------

Approximately 250 feet deep and approximately 120 feet long at the southeast
corner of the intersection of Redondo Avenue and Kilroy Airport Center Drive
between the San Diego Freeway property and Kilroy Airport Center Drive,
including the right by Developer to install landscape screening around the
existing surge tank and other equipment.  

7.4 Landscape California National Guard Entry
    -----------------------------------------

Two roughly triangular parcels abutting the screen wall at the entry to the
California National Guard property, one west of the entry with an area of
approximately 2,000 square feet and the other east of the entry between the east
border of the California National Guard property and Parcel G including a radius
curb border at the north end adjacent to the California National Guard entry
with an area of approximately 7,500 square feet.


                               EXHIBIT "F" Page
                                 7 of 7 Pages
<PAGE>
 
                                                           OFF SITE IMPROVEMENTS
                                                           ---------------------
                                                                 EXHIBIT F



            [MAP OF KILROY AIRPORT CENTER LONG BEACH APPEARS HERE]
<PAGE>
 
                                                           OFF SITE IMPROVEMENTS
                                                           ---------------------
                                                                 EXHIBIT F


            [MAP OF KILROY AIRPORT CENTER LONG BEACH APPEARS HERE]
<PAGE>
 
                                                                       EXHIBIT G



      [MAP OF BUILDING LANDSCAPE INDICATING PHASES OF WORK APPEARS HERE]



THIS PLAN IS REPRESENTATIVE OF THE QUALITY OF LANDSCAPING TO BE INSTALLED; 
HOWEVER, THE DESIGN, PLACEMENT AND PLANT SELECTIONS ARE SUBJECT TO CHANGE 
DEPENDING UPON ULTIMATE DESIGN CRITERIA AND SUBTENANT REQUIREMENTS.
<PAGE>
 
                                                                      EXHIBIT  H



             [ARTWORK INDICATING BUILDING ELEVATIONS APPEARS HERE]


THESE ELEVATIONS ARE REPRESENTATIVE OF THE BUILDINGS PRESENTLY PLANNED TO BE 
CONSTRUCTED; HOWEVER, THE DESIGN, DIMENSIONS AND MATERIALS ARE SUBJECT TO CHANGE
DEPENDING 
<PAGE>
 
                                                             EXTERIOR ELEVATIONS
                                                             -------------------
                                                                  EXHIBIT H


             [ARTWORK INDICATING BUILDING ELEVATIONS APPEARS HERE]


THESE ELEVATIONS ARE REPRESENTATIVE OF THE BUILDINGS PRESENTLY PLANNED TO BE 
CONSTRUCTED; HOWEVER, THE DESIGN, DIMENSIONS AND MATERIALS ARE SUBJECT TO CHANGE
DEPENDING 
<PAGE>
 
                                                             EXTERIOR ELEVATIONS
                                                             -------------------
                                                                  EXHIBIT H


             [ARTWORK INDICATING BUILDING ELEVATIONS APPEARS HERE]
<PAGE>
 
                                                               BOND NO.:________
                             PERFORMANCE BOND                  PREMIUM :________
                             ----------------


KNOW ALL MEN BY THESE PRESENTS, That we ________________________________________
______________________________,  as Principal, and _____________________________
_______________________________________________, as Surety, are held and firmly
bound unto City of Long Beach, a Municipal Corporation (Land Lessor) and Kilroy
Long Beach Associates, a California Limited Partnership (Land Lessee), as
Obligees, in the penal sum of __________________________________________________
______________________________________DOLLARS ($    ) lawful money of the United
States, for the payment of which sum truly to be made, we bind ourselves, our
heirs, executors, administrators, successors and assigns, jointly and severally,
firmly by these presents.

THE CONDITION OF THE OBLIGATION IS SUCH, That Whereas, the Principal entered
into a certain agreement which is hereto attached and made a part hereof, with
Kilroy Long Beach Associates, a California Limited Partnership, dated ________
________________, for _________________________________________________________
which contract and the specifications and general conditions thereof are hereby
incorporated herein and shall be deemed a part hereof as fully as if set out
herein.

NOW, THEREFORE, if the said Principal shall fully indemnify and save harmless
the Obligees from all loss, liability, costs, damages, penalty, attorney's fees
or expenses which Obligees may incur by reason of failure to well and truly keep
and perform each, every and all of the terms and conditions of said agreement on
the part of the said Principal to be kept and performed, including but not
limited to completion within the time specified of all work covered by said
agreement, performance of all obligation and guarantees of Kilroy Long Beach
Associates, a California Limited Partnership, relating to such work under the
contract with Kilroy Long Beach Associates, a California Limited partnership;
then this obligation shall be of no effect, but otherwise it shall remain in
full force and effect.

It is a condition hereof that any change, alteration, modification or amendment
of any nature whatsoever that may be made in the terms of said agreement, any
change in the character or scope of the work to be performed, or the method of
performance, under said agreement or modification of said agreement or in the
time for completion thereof, any change in the manner, time or amount of payment
as provided therein, any change of any nature whatsoever that may be made in the
terms of the contract


                                  EXHIBIT "I"

                               Page 1 of 6 Pages
<PAGE>
 
with Kilroy Long Beach Associates, a California Limited Partnership, or any
change that may be made in the performance of the work under said agreement by
the Principal, assented to by Kilroy Long Beach Associates, a California Limited
Partnership, whether made under express agreement or not, may be made without
notice to the Surety and without affecting the obligations of the Surety on this
bond and without requiring the consent of the Surety, and no such change or
changes shall release the Surety from any of its obligations hereunder, the
Surety hereby consenting to and waiving notice of any such change, alteration,
modification or amendment.

It is a further condition hereof that no one other than the named Obligees and
the successors, administrators or assigns of the Obligees shall have any right
of action under this bond.

IN WITNESS WHEREOF, the said Principal and Surety have hereunto set their hands
and seals this ________ day of __________________________, 19__.


              _____________________________________________
                              (Principal)

              BY:__________________________________________


              
              _____________________________________________
                                    (Surety)

              BY:__________________________________________


    Note:  The name "Kilroy Long Beach Associates, a California 
           Limited Partnership" would change to the name of any 
           successor Land Lessee.


                                  EXHIBIT "I"

                               Page 2 of 6 Pages
<PAGE>
 
                                  PAYMENT BOND                 BOND NO.:________
                                  ------------                 PREMIUM :________



KNOW ALL MEN BY THESE PRESENTS, That we ________________________________________
__________________________ as Principal, and __________________________________,
as Surety, are held and firmly bound unto City of Long Beach; a Municipal
Corporation (Land Lessor) and Kilroy Long Beach Associates, a California Limited
Partnership (Land Lessee), as Obligees, in the penal sum of ____________________
__________________________________ DOLLARS ($     ), lawful money of the United
States, for the payment of which sum well and truly to be made, we bind
ourselves, our heirs, executors, administrators, successors and assigns, jointly
and severally, firmly by these presents.

THE CONDITION OF THE OBLIGATION IS SUCH, That Whereas, the Principal entered
into a certain agreement which is hereto attached and made a part hereof, with
Kilroy Long Beach Associates, a California Limited Partnership, dated __________
_____________________, for _____________________________________________________
which contract and the specifications and general conditions thereof are hereby
incorporated herein and shall be deemed a part hereof as fully as if set out
herein.

NOW, THEREFORE, if the said Principal shall pay promptly and in full the claims
of all persons, firms or corporations, performing labor or furnishing equipment,
materials, or supplies incurred in connection with the contract to be performed
under said agreement and shall indemnify and save harmless of Obligees from all
loss liability, costs, damages, penalty, attorney's fees or expenses for all
taxes, insurance premiums, any and all applicable contributions, allowances or
other payments or deductions, however harmed, required by statute or union labor
agreement, including voluntary payment thereof by the Obligees necessary to
insure orderly prosecution of work or other items or services used in, upon or
for or incurred in connection with the contract to be performed under said
agreement, then this obligation shall be of no effect, but otherwise it shall
remain in full force and effect.

It is a condition hereof that any change, alteration, modification or amendment
of any nature whatsoever that may be made in the terms of said agreement, any
change in the character or scope of the work to be performed, or the method of
performance, under said agreement or any change in manner, time



                                  EXHIBIT "I"

                               Page 3 of 6 Pages
<PAGE>
 
or amount of payment as provided therein, any change of any nature whatsoever
that may be made in the terms of the contract between Kilroy Long Beach
Associates, a California Limited Partnership, or any change that may be made in
the performance of the work under said agreement by the Principal, assented to
by Kilroy Long Beach Associates, a California Limited Partnership, whether made
under express agreement or not, may be made without notice to the Surety and
without affecting the obligations of the Surety on this bond and without
requiring the consent of the Surety and no such change or changes shall release
the Surety from any of its obligations hereunder, the Surety hereby consenting
to and waiving notice of any such change, alteration, modification or amendment.

Subject to the priority of the named Obligees with respect to recovery up to the
penal sum of this bond, persons who have supplied or furnished labor, material,
machinery, equipment or supplies to the Principal for use in the prosecution of
the work provided for in said contract shall have a direct right of action
against said Principal and Surety under this bond.

IN WITNESS WHEREOF, the said Principal and Surety have hereunto set their hands
and seals, this _____ day of _______________________________, 19__.


              __________________________________________________
                                  (Principal)

              BY:_______________________________________________


              __________________________________________________
                                   (Surety)

              BY:_______________________________________________



    Note:  The name "Kilroy Long Beach Associates, a California 
           Limited Partnership" would change to the name of any 
           successor Land Lessee.



                                  EXHIBIT "I"

                               Page 4 of 6 Pages
<PAGE>
 
                   LENDER'S OBLIGEE RIDER TO PERFORMANCE BOND
                   ------------------------------------------


    WHEREAS, heretofore, on or about the _______ day of _________________, 
19__, _________________________________________________________________________,
as Contractor, entered into a written agreement with Kilroy Long Beach
Associates, a California Limited Partnership, as Owner of leasehold
improvements, for the construction of __________________________________________
_______________________________________________________________________________,
and

    WHEREAS, the Contractor and ________________________________________________
________________, a California corporation, as Surety, executed and delivered to
Kilroy Long Beach Associates, a California Limited Partnership, their joint and
several Performance Bond, and

    WHEREAS, Kilroy Long Beach Associates, a California Limited Partnership, has
arranged for a loan for the exclusive purpose of payment for the performance of
said contract and has requested the Contractor and Surety to join with Kilroy
Long Beach Associates, a California Limited Partnership, in the execution and
delivery of this Rider, and the Contractor and Surety have agreed so to do upon
the condition herein stated.

    NOW, THEREFORE, in consideration of one dollar and other good and valuable
consideration receipt of which is acknowledged, the undersigned agree that the
said Performance Bond shall be, and is, amended as follows:

    1.   The name of _________________________________________________________,
         as shall be added to said bond as a named Obligee.

    2.   The rights of the Lender as a named Obligee shall be subject to the
         condition precedent that Kilroy Long Beach Associates, a California
         Limited Partnership, obligations to the Contractor be performed.

    3.   The aggregate liability of the Surety under said bond to Kilroy Long
         Beach Associates, a California Limited Partnership, and the Lender, as
         their interests may appear, is limited to the penal sum of the said
         bond.

    4.   The Surety may, at its option, make any payment under said bond by
         check issued jointly to Kilroy Long Beach Associates, a California
         Limited Partnership, and the Lender.

    5.   Except as herein modified, said Performance Bond shall be and remain in
         full force and effect.



                                  EXHIBIT "I"

                               Page 5 of 6 Pages
<PAGE>
 
    Signed, sealed and dated this ______ day of ____________________________,
19___.

                                       KILROY LONG BEACH ASSOCIATES, A
                                       California Limited Partnership

ATTEST:__________________________      BY: KILROY INDUSTRIES, a
                                           California Corporation,
                                           General Partner

                                           By: ______________________________

                                           Title: ___________________________

                                       By: __________________________________

                                       By: __________________________________
                                                        (Owner)

ATTEST:___________________________     BY: __________________________________

                                           __________________________________
                                                        (Surety)

ATTEST:___________________________     BY: __________________________________

                                           __________________________________
                                                      (Contractor)



                                  EXHIBIT "I"

                               Page 6 of 6 Pages
<PAGE>
 
                       EXHIBIT "J" INTENTIONALLY OMITTED
<PAGE>
 
                             FIXED BASE OPERATIONS
                             ---------------------

          This Exhibit specifies the standard responsibilities of a Fixed Base
Operation (FBO) at the Long Beach Municipal Airport. It is the intention of
the parties that the execution of these terms shall be the responsibility of
Developer. Nothing herein shall be deemed to prevent Developer from imposing
these requirements as a duty on its subtenants so long as Developer shall remain
primarily responsible to City therefor in case of failure of Developer and FBO
subtenants to fulfill their obligations hereunder. Said requirements shall be
subject to the following exceptions:

          1.  Nothing herein shall be deemed to require Developer to operate any
FBO facility except through subtenants. If the FBO premises are not subleased by
Developer, Developer's sole obligation shall be to use reasonable efforts to
sublet the same upon terms and conditions reasonably satisfactory to Developer.
The temporary cessation of business operations by reason of casualty,
remodeling, holidays and other business reasons consistent with the continued
operation of such business from the FBO premises shall not constitute a
violation of such requirements.

          2.  Developer may franchise the various elements of the FBO
operation, however, the performance requirements shall be construed to cause
construction of at least, but not more than, one fuel facility and one wash rack
on the FBO premises for each complete FBO facility, but in no event less than
one such facility on the Premises.  Developer may, however, construct more than
one fuel facility and one wash rack for each such FBO facility on the
<PAGE>
 
          3.  City and Developer shall deal directly with each other as to the
matters governed by this Exhibit, except as expressly provided to the contrary.

          4.  As used in this Exhibit, the term "Lessee" or "Tenant" shall mean
Developer and the term "Lessor" or "Landlord" shall mean City.

          5. The provisions of this Exhibit shall be applicable only to those
portions of the Premises from time to time improved and used by or under
Developer for FBO uses, which portions are hereinafter referred to as the "FBO
Premises". Portions of the Premises initially improved and used for FBO uses
may be redeveloped and used for other purposes and portions of the Premises
initially improved and used for non-FBO uses may be redeveloped and used for FBO
uses, provided that the improved areas for aircraft tie-downs and/or hangar
space, usable for such purposes under applicable laws, in the Project are not
reduced by reason thereof.  Any portion of the Premises used for non-FBO uses or
redeveloped for use other than FBO uses shall be physically segregated from the
Long Beach Municipal Airport by fencing or other barriers meeting FAA security
requirements.

          6. References to Developer's subtenants in this Exhibit shall be
deemed references to Developer during any period of time that Developer conducts
and operates a business on or from the FBO Premises directly, and not through or
under a subtenant.  

          7. Any subtenant of Developer or transferee by sublease by or under
such a sublessee shall be deemed to be a subtenant for purposes of this Exhibit
"G". Where any such sub-
<PAGE>
 
tenant performs any act or obligation required herein, Developer shall be
relieved of all obligation therefor.

          8. Except as to matters specifically related to the operation of the
Airport or of the FBO facilities, the terms of the Lease between Developer and
City to which this Exhibit "G" is attached shall prevail in the case of any 
conflict between such terms and the terms of this Exhibit "G".

          9. Nothing in this Exhibit shall be deemed to apply to any portion of
the project other than the FBO uses.

         10. Nothing herein shall be deemed to require construction or
improvement of the Premises except in the manner authorized by applicable land
and airport rules.  Metal buildings, such as "Butler Buildings" shall be
permitted.

         11. City shall endeavor in making airport improvements to minimize
interference with the operation of business on or from the Premises and shall
give reasonable notice to Developer of any duty thereon except in case of
emergency when such duty is necessary to prevent damage or injury to persons or
property.

         12. Developer shall require its subtenants affected thereby to pay the
fuel flowage fee provided for herein for the benefit of City as a third party
beneficiary to enable City to directly enforce such requirements against
subtenants. Developer shall not be liable for payment of such fuel flowage fees
unless Developer shall refuse upon request by City to cooperate in the
collection thereof from Developer's subtenant. Such cooperation shall not be
construed as obligating Developer to terminate the sublease or the subtenant's
right to possession.

         13. Sales permitted by the "use" restrictions may be
<PAGE>
 
wholesale or retail.

         14. Assignments or other transfers of the type described in
subparagraphs (i) through (vi) of Section 5.1.3 of this Lease or of the type
permitted by Section 1.3.3 of this Lease by subtenants shall be permitted
without the approval of City's City Manager of the assignee or transferee.
City's City Manager shall, however. be promptly notified of any such assignment
or other transfer and provided with the information described in subparagraphs
(i) and (ii) of Section 5.1.2 of this Lease.

         15. Paragraph E of the "Operation of Business" restrictions shall not
be applicable to the rents charged and/or other services provided by or under
Developer as a sublessor.

         16. The maintenance obligations set forth in the "Maintenance" 
requirement shall be subject to and shall reasonable wear and tear. City's
Airport except Manager may not cure Developer's failures under said
"Maintenance" requirement if Developer commences such maintenance within thirty
(30) days of its receipt of written notice of such failure and thereafter
diligently prosecutes the same to completion. Developer shall have thirty (30)
days following its receipt of written request for payments under said
"Maintenance" requirement, together with reasonable supportive evidence of the
costs incurred, to reimburse City such costs.

         17. The last sentence in Paragraph C of the requirement entitled
"Aircraft Parking, Storage and Hangers" is hereby deleted and shall not be
applicable to the Premises.

         18. Paragraph C of the requirement entitled "Storage"
<PAGE>
 
is hereby deleted and shall not be applicable to the Premises. City's remedies
under this Lease for a default by Developer, however, shall be applicable to
breaches of the requirements of the requirement entitled  "Storage", not cured
within the time provided in Section 17.6.1 following Developer's receipt of
notice of such breach.

         19. Developer shall conclusively be deemed to have satisfied the 
"Automobile Parking" requirements if Developer improves the FBO Premises in a
manner consistent with all applicable parking code requirements of the City of
Long Beach at the time such construction.

         20. Developer may satisfy the requirement in Paragraph B of the
requirement entitled "Fuel Flowage Fees" by having its subtenant enter into the
supplier agreement, in which event all references to Developer in Paragraph B
shall be deemed references to Developer's subtenant.  If Developer has required
its subtenants to make the reports required by Paragraph D of the requirement
entitled "Fuel Flowage Fees", Developer shall not be liable for a failure by its
subtenants to make such reports unless Developer shall refuse upon request by
City to cooperate in enforcing such reporting requirements, which cooperation
shall not be construed as obligating Developer to terminate the sublease.

         21. The requirement entitled "Utilities" shall be enforced only
insofar as is practical.

         22. Notwithstanding the provisions of Paragraph B  of the requirement
entitled "FAA Security and Safety Regulations" to the contrary, if any sublease
includes a covenant by the sublessee to indemnify and hold City harmless for the
full amount
<PAGE>
 
of any fine, penalty or other financial loss resulting from any violation of
Part 107 or Part 139 occurring on the subleased premises, or by or under such
sublessee, Developer shall not be liable to indemnify or to reimburse City for
the amount of any  such fine, penalty or other financial loss covered by such
subtenant's indemnify.  

         23. Whenever the consent, approval, specification or authorization of
City, City's City Manager or the Airport Manager is required by this Exhibit,
such consent, approval, specification or authorization shall not unreasonably be
withheld.

         24.  Developer shall not be deemed to have failed to perform its
obligations under this Exhibit "G" if such failure is the result of a breach by
a subtenant under a sublease of the FBO Premises, or any portion thereof, unless
Developer fails to take reasonable action to cause such breach to be cured or to
terminate such sublease or the subtenant's right to possession within forty-
five (45) days of Developer's receipt of written notice from City of the
occurrence of such breach.
<PAGE>
 
                      CONSTRUCTION, ALTERATION AND CHANGES
                      ------------------------------------

          LESSEE shall not place upon the Leased Premises any portable
buildings, trailers, or other like portable structures without prior written
approval of LANDLORD's Airport Manager.
<PAGE>
 
                                      USE
                                      ---

          The Leased Premises and any and all improvements located or erected
thereupon shall be used solely for the purpose of conducting a fixed base
operation and no other purpose.  The fixed base operation is limited to the
following aeronautical and support uses which are inclusive.

          A.  Sale of new and used aircraft (both retail and wholesale);

          B.  Sale of aircraft parts and accessories (both retail and 
wholesale);

          C.  Sale of aircraft parts, components and allied equipment;

          D.  Sale of new and used avionics and electronic equipment;

          E.  Sale of new and used aircraft instruments;

          F.  Storage, sale and dispensing of petroleum products on the Leased
Premises.

          G.  Sale of pilot supplies and accessories;

          H.  Leasing and rental of aircraft;

          I.  Sale of aircraft insurance;

          J.  Financing of aircraft;

          K.  Operation of air cargo and air freight activities (subject to
prior written approval of LANDLORD's Airport Manager;

          L.  Flight operations, including ground school, flight
training/proficiency, demonstration of aircraft for sale, charter and air taxi.
Charter/Air Taxi operations are subject to prior written approval of LANDLORD's
Airport Manager.  The conduct of
<PAGE>
 
scheduled commercial service is expressly prohibited;

          M.  Maintenance, repair, overhaul and modification of aircraft,
aircraft engines, airframes, flight systems, instruments, avionics, electronics
equipment, propellers and related aircraft components;

          N.  Rental of aircraft storage hangars and open tie-down facilities;

          O.  Operation of a UNICOM radio transmitter and receiver (subject
to written approval of LANDLORD's Airport Manager);

          P.  Washing, detailing and waxing of aircraft;

          Q.  Providing upholstery, cabinetry and interior services;

          R.  Parachute, fire extinguisher and oxygen services;

          S.  Line Services for the purpose of meeting the needs of transient
aircraft;

          T.  Operation of food vending equipment and/or a coffee bar for the
purpose of serving TENANT's employees and customers;

          U.  Rent-a-car service (subject to a prior written agreement between
LANDLORD and rent-a-car company or TENANT in the event of TENANT operated 
service);

          V.  Maintenance and servicing of TENANT-owned and operated automotive
ramp equipment; 
 
          W.  Aircraft stripping and painting;

          X.  Any such other aviation related uses as may be approved in writing
by LANDLORD's Airport Manager.
<PAGE>
 
                               UNAUTHORIZED USES
                               -----------------

          Only the uses specified in the use clause hereof are authorized uses,
and such uses are authorized only when conducted by TENANT or a Subtenant-
approved in advance by LANDLORD's City Manager. All other business activities
engaged in on or from the Leasehold premises for involving provision of services
or products to parties other than TENANT or an approved Sub-tenant for financial
gain are prohibited.  Said prohibition shall be enforced by TENANT.
<PAGE>
 
                             OPERATION OF BUSINESS
                             ---------------------

          A.  TENANT shall continuously use and operate the premises, during all
usual business hours and on all such days as comparable business of like nature
in the area are open for business in accordance with the provisions of this
Lease relating to use.  If the premises are destroyed or partially condemned and
this Lease remains in full force and effect, TENANT shall continue operation of
its business at the premises to the extent reasonably practical as determined by
good business judgment during any period of reconstruction.

          B.  TENANT shall appoint in writing an authorized local agent duly
empowered to make decisions on behalf of TENANT in all routine administrative
and operational matters relating to the Leased Premises who shall be available
during normal business hours.  TENANT shall notify LANDLORD's Airport Manager in
writing of the name, address and telephone number of the said agent and shall
supply therewith a copy of the writing appointing the agent.


          C.  All businesses operating on or from the Leased Premises shall
maintain a suitable office which is staffed during normal business hours.

          D.  Rotary winged aircraft may not be parked, repaired or operated
from the Leased Premises without the prior written approval of the Airport
Manager and such approval, if granted, is subject to Airport Rules and
Regulations and may be terminated
<PAGE>
 
by the Airport Manager on thirty (30) days notice unless otherwise specified in
writing at the time of said written approval.


          E.  Aviation services are supplied for the benefit of the aviation
public and shall be carried out in a reasonable manner and at appropriate
prices.  The Airport Manager may investigate reports of unfair prices or
service.
<PAGE>
 
                              COMPLIANCE WITH LAW
                              -------------------

          No improvements or structures either permanent, temporary or portable,
shall be erected, placed upon, operated or maintained on the Leased Premises,
nor shall business or any other activity be conducted or carried on, in, onto,
or from the Leased Premises in violation of the terms of this Lease or any duly
adopted rules, regulations, orders, law, statute, by-law, or ordinance of any
governmental agency having jurisdiction thereover.

17.              PERFORMANCE
                 -----------

          1.   All fixed base operation facilities shall have the capacity to 
store and dispense fuel.

          2.   All fixed base operation facilities shall provide an aircraft
wash rack.
<PAGE>
 
                                MONTHLY REPORT
                                --------------


          Within fifteen (15) days after execution of this Lease, TENANT shall
submit a written report to LANDLORD's Airport Manager listing all based aircraft
located on the Leased Premises. Said report shall be prepared on a form supplied
by LANDLORD, and shall include for each based aircraft located on the Leased
Premises:  the make, model, registration number, color, space or hangar number,
registered owner(s) name(s), address(es) and telephone number(s).  Should
aircraft be on lease, the same information required for owner shall be provided
for any or all lessee(s) of said aircraft.

          For purposes of this section, a based aircraft is any aircraft which
makes arrangements to park at Long Beach Airport for any purpose other than
those specified herein, to with:

          (a) Visiting or transient aircraft who utilize parking facilities for
less than fifteen (15) days in any thirty (30) day period.

          (b) Aircraft maintaining tiedown or storage space at another airport
that are undergoing maintenance, service or repair by a tenant or subtenant.

          (c) New aircraft awaiting sale and/or delivery by a tenant or
subtenant where delivery subsequent to sale occurs within thirty (30) calendar
days.

          (d) Used aircraft for sale by a tenant or sub-tenant where delivery
subsequent to sale occurs within thirty (30) calendar days.
<PAGE>
 
                           RESERVATIONS TO LANDLORD
                           ------------------------


          LANDLORD reserves the right to enter and have access to the property
in order to make, construct or carry out airport improvements.


                           USE OF AIRPORT FACILITIES
                           -------------------------

          TENANT shall have, in conjunction with the general public and other
airport users, a non-exclusive right to the use of the public airport
facilities provided and developed by LANDLORD for public aviation use on such
terms and conditions as such facilities may be made available by LANDLORD either
now or in the future and subject to all applicable laws and rules of the United
States, the State of California or the City of Long Beach governing aviation air
navigation or the use of the airport.
<PAGE>
 
                                  MAINTENANCE
                                  -----------


          TENANT agrees, at TENANT's sole cost and expense, to repair and
maintain the Leased Premises and all improvements or landscaping existing or
constructed thereon in good order and repair and to keep said premises and
facilities in a neat, clean, attractive and orderly condition. Failure of the
TENANT to properly maintain and repair the Leased Premises shall constitute a
breach of the terms of this Lease.

          If, in the opinion of LANDLORD's Airport Manager, the Leased Premises
are not being properly maintained, LANDLORD's Airport Manager may, after giving
thirty (30) days written notice to TENANT to remedy discrepancies, cause such
repair and maintenance to be made.  The cost of such maintenance or repair shall
be added to the rent.  If said costs are not paid promptly by TENANT, this Lease
shall be deemed to be in default, and LANDLORD shall be entitled to all legal
remedies provided hereunder.
<PAGE>
 
                     AIRCRAFT PARKING, STORAGE AND HANGARS
                     -------------------------------------


          A.  TENANT shall provide open aircraft parking aprons which shall be
so designed, marked and maintained, as to provide for safe and functional
parking of aircraft, including sufficient distance between all structural
elements (including, but not limited to body, wings and tail) of parked aircraft
to permit safe movement of aircraft to and from aircraft parking spaces.
Aircraft tiedown equipment or apparatus shall be of a type approved by the
Airport Manager for use at the airport and all aircraft designed and equipped
to be tied down shall be properly secured to such tiedown apparatus when left
unattended.  All tie-down spaces shall be clearly marked on the pavement with an
identification number in such manner that each individual parking space can be
easily identified.


          B.  TENANT will provide and maintain taxi lanes and aircraft parking
spaces clear of obstacles, vehicles and improperly parked aircraft in a manner
which will permit safe and convenient movement of aircraft throughout all open
parking areas.


          C.  TENANT will provide adequate aircraft parking spaces on the
Leased Premises to accommodate transient or visiting aircraft or aircraft
present at TENANT's facility for the purpose of maintenance or other work.
Parking is permitted only in designated spaces on FBO leases and TENANT
expressly covenants and agrees to make every reasonable and prudent effort to
prevent
<PAGE>
 
parking of aircraft or ground vehicles on property contigious to the Leased
Premises, but not a part thereof.  The Airport Manager may require creation of
additional parking spaces if he finds that aircraft using TENANT's facilities
are parking in areas other than authorized tie downs or hangar spaces.


          D.  Maintenance and repair of aircraft on the based and transient
aircraft parking area shall be limited to that permitted by Federal Aviation
Regulations Part 43(h) and Appendix A(c), unless otherwise specifically
authorized in writing by the Airport Manager.  Said parking areas shall be kept
free from partially dismantled or derelict aircraft.


          E.  Aircraft storage hangars shall be used for storage of aircraft
only and no maintenance shall be done therein, except as specifically authorized
by Federal Aviation Regulations Part 43(h) and Appendix A(c) if such maintenance
and repair car be done in compliance with such fire, building and safety codes,
rules and/or regulations as may be applicable to such hangar or activity from
time to time.


          F.  Maintenance, repair and other activities may be conducted in
hangars heretofore or hereafter constructed in such manner that such maintenance
repair and other activities can be carried out in such hangar in compliance with
such fire, building and safety codes, rules and/or regulations, as may be
applicable from time to time to such activities, if authorized in writing by the
Airport Manager
<PAGE>
 
such notice in writing as is possible under the existing circumstances.


          D.  LANDLORD will cause the surface of the Leased Premises to be
restored to its original condition upon the completion of any construction done
pursuant to this paragraph.


          E.  LANDLORD shall exercise its best efforts to avoid unreasonable
interference with TENANT's operations or enjoyment of the premises or impairment
of the security of any secured creditor in its exercise of rights pursuant to
this paragraph.


          F.  Should any exercise of the rights described in this paragraph
result in a significant interference with TENANT's use of the Leased Premises,
LANDLORD shall provide compensation to TENANT by means of a reduction in rent
proportionate to the amount of the interference which shall continue for not
more than two months or until TENANT has been adequately compensated, whichever
comes first.
<PAGE>
 
          G.  All aircraft service, maintenance, repair, inspection and building
activities conducted for financial gain within or from aircraft storage hangars
shall be done by fixed based operators, tenants or sub-tenants located on the
Long Beach Municipal Airport or their duly authorized personnel. No other
persons may perform such work.


          H.  Parking spaces in storage hangars shall be marked, numbered and
designed in the manner specified in subparagraph A of this paragraph for tie 
down spaces.


          I.  The aircraft identification number of each aircraft parked in a
hangar shall be affixed to the outside of such hangar in a convenient and
plainly visible manner and said information shall be revised from time to time
so that it shall be current and visible at all times.


          J.  Aircraft hangars constructed after the date of execution of this
Lease shall be so designed and constructed by means of a method approved by the
Airport Manager as to permit verification for identification, safety and
security purposes of all aircraft parked therein at all times without
compromising the security of such aircraft.

<PAGE>
 
                AIRCRAFT TIEDOWN AND STORAGE HANGAR AGREEMENTS
                ----------------------------------------------


          TENANT is authorized to enter into sublease agreements to permit
aircraft tiedown and storage on the Leased Premises without approval of
LANDLORD, provided that TENANT shall enter into and maintain current a written
Aircraft Tiedown or Aircraft Storage Hangar Agreement with the owner or lessee
or operator of each aircraft renting space on the Leased Premises.  Such
agreements shall be in writing and shall specify all terms, conditions and
restrictions relating to the rental of space for the tiedown or storage of
TENANT's aircraft and indicating that said owner, operator or lessee of an
aircraft to be tied down or stored is a sub-tenant of LANDLORD as well as
TENANT by virtue of the creation of this sublease.  Such agreement shall also
require that the information which TENANT must provide to LANDLORD to the terms
of Paragraph *___ of this Lease shall be supplied  to TENANT by any parties with
whom TENANT has entered such agreements.  LANDLORD'S Airport Manager or his
designated representative may inspect TENANT's file of Aircraft Tiedown and
Storage Hangar Rental Agreements at any reasonable time during TENANT's regular
business hours.



*Page 14 of this Exhibit "G"
<PAGE>
 
                                    STORAGE
                                    -------


          A.  TENANT may store aircraft components, equipment, parts, bulk
liquids, scrap lumber, metal, machinery or other materials related to the
conduct of its business on the Leased Premises, provided, however, that such
storage may be one only within a fully enclosed permanent structure. No storage
may be done on any apron, ramp or taxiway, without prior written approval of
Airport Manager.

          B.  Derelict aircraft, inoperative grounded vehicles, unused ramp
equipment, scaffolding, hoists and related items not regularly and routinely in
use as part of TENANT's business, may not be kept on the Leased Premises unless
such materials are maintained within a fully enclosed permanent structure.

          C. Violation of the requirements of this Paragraph shall be deemed in
default if the condition has not been cured to the satisfaction of the Airport
Manager within thirty (30) days of posting of the property or service of TENANT
with a notice thereof.
<PAGE>
 
                              AUTOMOBILE PARKING
                              ------------------


          TENANT agrees to provide sufficient automobile parking on the Leased
Premises to accommodate the parking needs of patrons, visitors and employees,
provided, however, that Airport streets and access roadways may not be utilized
to comply with this requirement.
<PAGE>
 
                               FUEL FLOWAGE FEES
                               -----------------


          A.  REQUIREMENT TO PAY
              ------------------

          TENANT agrees to pay such fuel flowage fees at such rates as may be
regularly established from time to time by LANDLORD's City Council for aircraft
fuels delivered at the airport. Such fees shall be due and payable on the tenth
(10th) day of this month succeeding that in which the aircraft fees are received
by TENANT.  The fees shall be calculated and administered as provided herein.

          B.  SUPPLIER AGREEMENT.
              ------------------
          TENANT shall enter into a written agreement with its fuel supplier
which recognizes the existence of the provisions of this agreement.  A copy of
said agreement shall be delivered to LANDLORD 's Airport Manager prior to the
commencement of fuel delivery.  Said agreement shall provide that either TENANT
or TENANT's supplier shall indemnify, hold harmless and provide insurance
coverage to the City for all uses arising from the delivery, storage, sale and
supplying of such fuel.  Such agreement shall further provide that the supplier
shall make available to the City at reasonable times, its records of
transactions involving delivery of fuel to TENANT for purposes of auditing
TENANT's performance under this agreement.


          C.  UNDERGROUND STORAGE AND DELIVERY.
              --------------------------------

          All fuel delivered to TENANT by its supplier or suppliers shall be
placed into underground storage facilities, the
<PAGE>
 
location and design of which shall have been approved by LANDLORD'S Airport
Manager and all fuel delivered by any supplier or suppliers shall be placed
directly into said approved underground storage facilities.


          D.  REPORTING, PAYMENT AND STATEMENTS.
              ---------------------------------

          Deliveries of fuel shall be reported and fees therefor paid by TENANT
to LANDLORD each calendar month as provided herein. The fees to be paid shall be
computed on the basis of the oil company's meter tickets supplied by the tanker
truck holding the delivery from, or from refinery meter tickets provided to the
carrier at the time the tanker truck is loaded.  The amount shown on such
tickets to have been delivered in agreement shall be multiplied by the rate
established by the City Countil then in effect. The product of that computation
shall be the fuel flowage fee due for that month. TENANT will provide a year-end
statement showing all deliveries in the previous year. Both monthly reports and
year-end statements shall be on forms supplied by the Airport Manager

                                     -25-

<PAGE>
 
                                NOISE ABATEMENT
                                ---------------


          TENANT expressly covenants to make every reasonable and prudent effort
to ensure that aircraft based on, or operating from, the Leased Premises adhere
to duly adopted present and future Noise Abatement Programs and Rules and
Regulations relating thereto.

                              AVIGATION EASEMENT
                              ------------------

          There is hereby excepted and reserved to the City of Long Beach, its 
successors and assigns, for the use and benefit of the public, a right of flight
for the passage of aircraft in the airspace above the surface of the premises
herein leased. This public right of flight shall include the right to cause in
said airspace any noise inherent in the operation of any aircraft used for
navigation or flight through said airspace or landing at, taking off from or
operation on the Long Beach Municipal Airport. The easement hereby excepted and
reserved shall not limit any improvements and other structures heretofore or
hereafter constructed or placed upon the premises in a manner consistent with
the applicable PD-2 zoning ordinance of the City of Long Beach and FAR Part 77
<PAGE>
 
                                 BULLETIN BOARD
                                 --------------

          TENANT will install and continuously maintain a bulletin board in a
location on the Leased Premises which will be convenient to and easily seen by
patrons, users and visitors and will post and display notices, bulletins and
other information supplied by the Airport Manager in a prominent place where
such will be easily visible to TENANT's employees, patrons, users and visitors,
or will authorize the Airport Manager to post such notices which shall remain
continuously on display for such period of time as the same may continue in
effect.


                                   UTILITIES
                                   ---------


          All utilities added from or after the date of this Lease shall be
underground.
<PAGE>
 
                                WASTE DISPOSAL
                                --------------

          TENANT shall construct all facilities necessary to prevent any water
or industrial waste from the operations of TENANT on the Leased Premises from
flowing into adjacent property.  TENANT shall dispose of all sewage and
industrial waste in accordance with all applicable regulations and laws of those
governmental agencies having jurisdiction or authority thereover.

          TENANT shall insure that all solid waste materials are placed in
appropriate covered containers designed for use with the type of waste involved,
which shall remain covered, and that said containers are maintained within
enclosures located on said Leased Premises and designated to keep said trash
containers out of the flow of traffic and obscured from view.
<PAGE>
 
                      FAA SECURITY AND SAFETY REGULATIONS
                      -----------------------------------

          A.  This Lease is subject to Federal Aviation Regulations Part 107 and
Part 139 relating to Safety and Security. LANDLORD shall provide copies thereof
to TENANT who shall provide copies thereof to all sub-tenants.


          B.  If any violation oft Part 107 or Part 139 occurs on the Leased
Premises, TENANT or its sub-tenants shall be strictly liable to reimburse
LANDLORD for the full amount of any fine, penalty or other financial loss
resulting thereform.


                             BILLBOARDS AND SIGNS
                             --------------------


          TENANT agrees not to construct, install or maintain, nor to allow upon
the Leased Premises any billboards, signs, banners or like displays which may be
placed in or upon any building or structure in such manner as to be visible from
the outside thereof, except those approved in writing by LANDLORD's Airport
Manager.
<PAGE>
 
                                     AUDIT
                                     -----


          The LANDLORD, City Auditor and City Manager, or their designated
representatives, shall be permitted to examine and review TENANT's records at
all reasonable times, with or without prior notification, for the purpose of
determining compliance with all terms, covenants and conditions of this Lease.
Such examinations and reviews shall be conducted during TENANT's regular
business hours in a manner causing as little inconvenience as possible to
TENANT.
<PAGE>
 
                              POSSESSORY INTEREST
                              -------------------


          TENANT recognizes and understands that this Lease may create a
possessory interest subject  to property taxation and that TENANT may be subject
to the payment of property taxes on such interest.


                  FEDERAL AVIATION ADMINISTRATION ASSURANCES
                  ------------------------------------------


          This Lease is subject to certain assurances mandated by the Federal
Aviation Administration for inclusion in airport leases.  These assurances are
set out in full in Exhibit "H" attached hereto and made a part hereof.
<PAGE>
 
                         FAA REQUIRED LEASE PROVISIONS
                         -----------------------------

  LEASE PROVISIONS:
  ----------------

  1.  The Lessee, for himself, his heirs, personal representatives, successors
  in interest, and assigns, as a part of the consideration hereof, does hereby
  covenant and agree "as a covenant running with the land") that in the event
  facilities are constructed, maintained, or otherwise operated on the said
  property described in this Lease, for a purpose for which a DOT program or
  activity is extended or for another purpose involving the provision of similar
  services or benefits, the Lessee shall maintain and operate such facilities
  and services in compliance with all other requirements imposed pursuant to
  Title 49, Code of Federal Regulations, DOT, Subtitle A, Office of the
  Secretary, Part 21, Nondiscrimination in Federally-Assisted Programs of the
  Department of Transportation-Effectuation of Title VI of the Civil Rights Act
  of 1964, and as said Regulations may be amended.

  2.  The Lessee for himself, his personal representatives, successors in
  interest, and assigns, as a part of the consideration hereof, does hereby
  covenant and agree as a covenant running with the land" that: (a) no person on
  the grounds of race, color or national origin shall be excluded from
  participation in, denied the benefits of, or be otherwise subjected to
  discrimination in the use of said facilities; (b) that in the construction of
  any improvements on, over, or under such land and the furnishing of services
  thereon, no person on the grounds of race, color or national origin shall be
  excluded from participation in; denied the benefits of, or otherwise be
  subject to discrimination; (c) that the Lessee shall use the premises in
  compliance with all other requirements imposed by or pursuant to Title 49,
  Code of Federal Regulations, Department of Transportation, Subtitle A, Office
  of the Secretary, Part 21, Nondiscrimination in Federally-Assisted Programs
  of the Department of Transportation-Effectuation of Title VI of the Civil
  Rights Act of 1964, and as said Regulations may be amended.

  3. Lessee shall furnish its accommodations and/or services on a fair, equal
  and not unjustly discriminatory basis to all users thereof and it shall charge
  fair, reasonable and not unjustly discriminatory prices for each unit or
  service; PROVIDED, THAT the Lessee may be allowed to make reasonable and
  nondiscriminatory discounts, rebates or other similar type of price reductions
  to volume purchasers.

  4.  Non-compliance with Provision 3 above shall constitute a material breach
  thereof and in the event of such non-compliance and Lessor shall have the
  right to terminate this Lease Agreement and the estate hereby created without
  liability therefore or at the election of

                                    -1-                              EXHIBIT L
<PAGE>
 
  the Lessor or the United States either or both said Governments shall have the
  right to judicially enforce Provisions.

  5.  Lessee agrees that it shall insert the above four Provisions in any Lease
  Agreement by which said Lessee grants a right or privilege to any person, firm
  or corporation to render accommodations and/or services to the public on the
  premises herein leased.

  6.  The Lessee assures that it will undertake an affirmative action program as
  required by 14 CFR Part 152, Subpart E, to insure that no person shall on the
  grounds of race, creed, color, national origin, or sex be excluded from
  participating in any employment activities covered in 14 CFR Part 152, Subpart
  E. The Lessee assures that no person shall be excluded on these grounds from
  participating in or receiving the services or benefits of any program or
  activity covered by this subpart. The Lessee assures that it will require that
  its covered suborganizations provide assurances to the Lessee that they
  similarly will undertake affirmative action programs and that they will
  require assurances from their suborganizations, as required by 14 CFR Part
  152, Subpart E, to the same effect.

  7.  The Lessor reserves the right to further develop or improve the
  landing area of the airport as it sees fit, regardless of the desires or view
  of the Lessee, and without interference or hinderance.

  8.  The Lessor reserves the right, but shall not be obligated to the Lessee to
  maintain and keep in repair the landing area of the airport and all publicly-
  owned facilities of the airport, together with the right to direct and control
  all activities of the Lessee in this regard.

  9.  This Lease shall be subordinate to the provisions and requirements of any
  existing or future agreement between the Lessor and the United States, 
  relative to the development, operation or maintenance of the airport.

  10.  Lessee agrees to comply with the notification and review requirements
  covered in Part 77 of the Federal Aviation Regulations in the event of future
  construction of a building is planned for the leased premises, or in the event
  of any planned modification or alteration of any present or future building or
  structures situated on the leased premises.

  11.  It is understood and agreed that nothing herein contained shall be
  construed to grant or authorize the granting of an exclusive right within the
  meaning of Section 308 of the Federal Aviation Act.

  12.  The Lessee by accepting this Lease agrees for itself, its successors and
  assigns that it will not make use of the leased premises in any manner which
  might interfere with the landing and

                                      -2-
<PAGE>
 
  taking off of aircraft from Long Beach Municipal Airport or otherwise
  constitute a hazard.  In the event the aforesaid covenant is breached, the
  owner reserves the right to enter upon the premises hereby leased, and cause
  the abatement of such interference at the expense of the Lessee.

  13.  This Lease and all the provisions hereof shall be subject to whatever 
  right the United States Government now has or in the future may have or
  acquire, affecting the control, operation, regulation and taking over of said
  airport.

                                      -3-
<PAGE>
 
Recording Requested By:



When Recorded Mail To:



                            SHORT FORM GROUND LEASE
                            -----------------------


          THIS SHORT FORM GROUND LEASE is made and entered into as of this
_________ day of ___________________, 198_, by and between the CITY OF LONG
BEACH, a municipal corporation ("Landlord"), and KILROY LONG BEACH ASSOCIATES, a
California Limited Partnership ("Developer").


                               R E C I T A L  S
                               - - - - - - -  -

          Landlord does hereby lease and demise to Developer that certain real
property in the City of Long Beach, County of Los Angeles, State of California,
more particularly described in Exhibit "A" attached hereto and all rights,
privileges and easements appurtenant thereto ("Premises" herein) pursuant to and
upon all of the terms, covenants and provisions set forth in that certain
unrecorded Ground Lease dated ____________________________, ("Ground Lease" 
herein), the terms, covenants and provisions of which are hereby incorporated 
herein and made a part hereof by reference.

                                  EXHIBIT "M"
                               Page 1 of 5 Pages
<PAGE>
 
    Landlord and Developer do further agree as follows:

    1.  The commencement date of the Ground Lease term is the date first
written above.

    2.  The term of the Ground Lease shall continue for fifty (50) years 
following the date of execution of the Ground Lease, subject to earlier 
termination as provided in the Ground Lease and subject to four (4) successive 
ten (10) year options and one (1) nine (9) year option to further extend the 
term of the Ground Lease.

    3.  Developer shall have the right to subdivide the Ground Lease into one or
more separate Ground Leases pursuant to Section 7.6 of the Ground Lease and to
recombine one or more separate Ground Lease into a single Ground Lease pursuant
to Section 7.7 of the Ground Lease. Developer also shall have the right to
encumber its leasehold interest in the Ground Lease (and in each separate Ground
Lease into which the Ground Lease may be subdivided) with one or more Leasehold
Mortgages (as defined in section 4.3.2 of the Ground Lease) in favor of one or
more Leasehold Mortgagees (as defined in section 4.3.3 of the Ground Lease).

    4.  Developer shall pay the real property taxes and assessments against the
Premises during the term hereof, as more specifically provided in the Ground
Lease.

    5.  Notwithstanding that the ownership of Landlord's and Developer's estates
in and to the Premises may become vested in

                                  EXHIBIT "M"
                               Page 2 of 5 Pages
<PAGE>
 
the same party for any reason, no merger of Developer's leasehold estate into
Landlord's fee title shall result or be deemed to result thereby, as provided in
Section 4.20 of the Ground Lease, provided that this provision shall not be
deemed applicable to a termination of Developer's leasehold estate by reason of
Developer's default or a taking under the power of eminent domain.

    6.  The Ground Lease grants to Developer the right to enter upon the
Premises demised thereby for a period of sixty (60) days following the
expiration of the term of the Ground Lease in order to remove any or all of the
buildings and other improvements constructed upon said Premises by or under
Developer.


    7.  The Ground Lease grants to Developer the right to sell any buildings
from time to time constructed upon the Premises, provided that such buildings
shall be and remain subject to the terms and conditions of the Lease and shall
be used and developed only in accordance with the Ground Lease for so long as
such buildings remain upon the Premises.

                     (THIS AREA INTENTIONALLY LEFT BLANK)
                            
                                  EXHIBIT "M"
                               Page 3 of 5 Pages

<PAGE>
 
    IN WITNESS WHEREOF, the parties have executed this Short Form Ground Lease
as of the day and year first above written.

                                           CITY OF LONG BEACH,
                                           
                                           A Municipal Corporation
                                           
                                           By:__________________________
                                           
                                           Title:_______________________
                                                        "Landlord"
                                           
                                           
                                           KILROY LONG BEACH ASSOCIATES,

                                           a California Limited Partnership,

                                           By:  KILROY INDUSTRIES, a
 
                                                California Corporation, 

                                                General Partner

                                                By: ____________________

                                                Title: _________________

                                           By: _________________________

                                           By: _________________________
                                                      "Developer"


                                  EXHIBIT "M"
                               Page 4 of 5 Pages

LBAC-3A/5.28.6.sr
<PAGE>
 
    This Short Form Ground Lease is hereby approved as to form this ___________
day of ________________________, 198_.


                                           ROBERT W. PARKIN, City Attorney


                                           By:__________________________
                                                        Deputy

                                  EXHIBIT "M"
                               Page 5 of 5 Pages
LBAC-3A/5.28.6sr
<PAGE>
 
                          LANDLORD'S ACKNOWLEDGEMENT
                          --------------------------
                                  Corporation
                                  -----------


STATE OF CALIFORNIA    )
                       )  ss.
COUNTY OF LOS ANGELES  )

    On June __, 1985, before me, the undersigned, a Notary Public in and for
said State, personally appeared _______________________ personally known to me 
or proved to me on the basis of satisfactory evidence to be the person who
executed the within instrument as the ___________________, on behalf of the 
City of Long Beach, the Municipal corporation that executed the within
instrument and acknowledged to me that said Municipal corporation executed the
within instrument pursuant to a resolution of its City Council.

WITNESS my hand and official seal.



                                                   _____________________________
                                                   Notary Public in and for said
                                                   State


SEAL
<PAGE>
 
                          DEVELOPER'S ACKNOWLEDGEMENT
                          ---------------------------



STATE OF CALIFORNIA    )
                       ) ss.
COUNTY OF LOS ANGELES  )

    On June __, 1985, before me, the undersigned, a Notary Public in and for
said State, personally appeared ___________________________________ and _______,
personally known to me or proved to me on the basis of satisfactory evidence to
be the persons who executed this instrument as ___________________________ and 
________________________, respectively, of Kilroy Industries, the corporation
that executed this instrument as one of the general partners of Kilroy Long
Beach Associates, a California Limited Partnership, the partnership that
executed the within instrument, and acknowledged to me that such corporation
executed the same as such partner and that said partnership executed the same.

WITNESS my hand and official seal.



                                                   -----------------------------
                                                   Notary Public in and for said
                                                   State


SEAL
<PAGE>
 
                               LEGAL DESCRIPTION
                               -----------------

THAT PORTION OF PARCEL 1, IN THE CITY OF LONG BEACH, IN THE COUNTY OF LOS
ANGELES, STATE OF CALIFORNIA, AS SHOWN ON A RECORD OF SURVEY, FILED IN BOOK 85,
PAGE 19, OF RECORD OF SURVEYS, IN THE OFFICE OF THE COUNTY RECORDER OF SAID
COUNTY, TOGETHER WITH THOSE PORTIONS OF LOTS 5 AND 9, TRACT NO. 10548, IN SAID
CITY, COUNTY OF STATE, AS PER MAP RECORDED IN BOOK 174, PAGES 15 TO 23,
INCLUSIVE OF MAPS, IN SAID RECORDER'S OFFICE, AND TOGETHER WITH THAT PORTION OF
LAKEWOOD BOULEVARD (FORMERLY KNOWN AS CERRITOS AVENUE, 80 FEET WIDE) AS SHOWN ON
SAID MAP OF TRACT NO. 10548, NOW VACATED BY THE STATE OF CALIFORNIA HIGHWAY
COMMISSION, A CERTIFIED COPY OF WHICH WAS RECORDED MAY 19, 1959, AS INSTRUMENT
NO. 3601, OF OFFICIAL RECORDS, IN THE OFFICE OF SAID COUNTY RECORDER, DESCRIBED
AS A WHOLE AS FOLLOWS:

BEGINNING AT THE MOST SOUTHERLY CORNER OF SAID PARCEL 1, SAID RECORD OF SURVEY;
THENCE NORTH 00 DEGREES 00 MINUTES 46 SECONDS EAST 324.60 FEET, ALONG THE
WESTERLY LINE OF SAID PARCEL 1, TO THE NORTHWESTERLY CORNER OF SAID PARCEL 1,
SAID NORTHWESTERLY CORNER BEING A POINT IN A NON-TANGENT CURVE CONCAVE NORTHERLY
AND HAVING A RADIUS OF 1,050.00 FEET, A RADIAL LINE THAT BEARS SOUTH 2 DEGREES
06 MINUTES 54 MINUTES WEST TO SAID POINT, SAID CURVE ALSO BEING THE NORTHERLY
LINE OF SAID PARCEL 1; THENCE EASTERLY ALONG SAID CURVE THROUGH A CENTRAL ANGLE
OF 27 DEGREES 32 MINUTES 10 SECONDS AN ARC DISTANCE OF 504.63 FEET TO A POINT,
SAID LAST MENTIONED POINT BEING A RADIAL LINE THAT BEARS SOUTH 25 DEGREES 25
MINUTES 16 SECONDS EAST, TO SAID LAST MENTIONED POINT; THENCE SOUTH 45 DEGREES
22 MINUTES 59 SECONDS EAST 1,403.34 FEET TO A POINT IN THAT CERTAIN COURSE AS
DESCRIBED AS HAVING A BEARING AND LENGTH OF "SOUTH 34 DEGREES 15 MINUTES 50
SECONDS WEST 225.46 FEET" IN THE NORTHWESTERLY BOUNDARY OF THAT PARCEL OF LAND
DESCRIBED AS PARCEL 1 IN DEED TO STATE OF CALIFORNIA, RECORDED MARCH 18, 1959,
AS INSTRUMENT NO. 1904, OF OFFICIAL RECORDS, OF SAID COUNTY, SAID LAST MENTIONED
POINT BEING NORTH 34 DEGREES 16 MINUTES 23 SECONDS EAST 40.81 FEET, ALONG SAID
COURSE, FROM THE SOUTHWESTERLY TERMINUS THEREOF; THENCE SOUTH 34 DEGREES 16
MINUTES 23 SECONDS WEST 40.81 FEET, ALONG SAID COURSE, TO THE NORTHEASTERLY
TERMINUS OF THAT CERTAIN COURSE IN SAID NORTHWESTERLY BOUNDARY, AS DESCRIBED IN
SAID LAST MENTIONED PARCEL 1, AS HAVING A BEARING AND LENGTH OF "SOUTH 62
DEGREES 04 MINUTES 30 SECONDS WEST, 51.05 FEET, MORE OR LESS,"; THENCE SOUTH 62
DEGREES 05 MINUTES 03 SECONDS WEST ALONG SAID LAST MENTIONED CERTAIN COURSE, TO
THE NORTHEASTERLY TERMINUS OF THAT CERTAIN COURSE AS DESCRIBED AS HAVING A
BEARING AND LENGTH OF "SOUTH 62


                                 EXHIBIT  "A"
                               Page 1 of 2 Pages
<PAGE>
 
DEGREES 04 MINUTES 30 SECONDS WEST, 113.28 FEET" IN SAID LAKEWOOD BOULEVARD, NOW
VACATED BY THE CALIFORNIA HIGHWAY COMMISSION; THENCE SOUTH 62 DEGREES 05 MINUTES
03 SECONDS WEST ALONG SAID LAST MENTIONED CERTAIN COURSE TO THE NORTHEASTERLY
TERMINUS OF THAT COURSE AS DESCRIBED AS HAVING A BEARING AND LENGTH OF "SOUTH 62
DEGREES 04 MINUTES 30 SECONDS WEST 704.56 FEET" IN THE NORTHERLY BOUNDARY OF
THAT PARCEL OF LAND DESCRIBED AS PARCEL 1 IN DEED TO THE STATE OF CALIFORNIA,
RECORDED MAY 11, 1959, AS INSTRUMENT NO. 1870, OF OFFICIAL RECORDS, OF SAID
COUNTY; THENCE ALONG SAID LAST MENTIONED NORTHERLY BOUNDARY SOUTH 62 DEGREES 05
MINUTES 03 SECONDS WEST 704.56 FEET, SOUTH 80 DEGREES 05 MINUTES 43 SECONDS WEST
105.00 FEET AND NORTH 80 DEGREES 14 MINUTES 59 SECONDS WEST 676.33 FEET; THENCE
NORTH 8 DEGREES 14 MINUTES 01 SECONDS EAST 570.00 FEET; THENCE NORTH 25 DEGREES
20 MINUTES 00 SECONDS EAST 15.00 FEET; THENCE NORTH 8 DEGREES 44 MINUTES 49
SECONDS WEST 248.97 FEET TO THE SOUTHERLY PROLONGATION OF SAID WESTERLY LINE OF
PARCEL 1, AS SHOWN ON SAID RECORD OF SURVEY; THENCE NORTH 0 DEGREES 00 MINUTES
46 SECONDS EAST 72.14 FEET ALONG SAID PROLONGATION, TO THE POINT OF BEGINNING.

ALSO EXCEPTING THEREFROM ALL OIL, GAS AND OTHER HYDROCARBONS IN AND UNDER, OR
WHICH MAY BE PRODUCED OR SAVED FROM SAID LAND; TOGETHER WITH ALL RIGHTS OF EVERY
KIND AND DESCRIPTION WHATSOEVER TO DRILL FOR, DEVELOP, TAKE, REMOVE, AND SEVER
THE SAME, OR ANY PART THEREOF, FROM SAID LAND, WITHOUT, HOWEVER, THE RIGHT TO
THE USE OF THE SURFACE OF SAID LAND IN CONNECTION WITH THE DEVELOPMENT OR
REMOVAL OF SAID OIL, GAS OR OTHER HYDROCARBONS, ALL DRILLING AND BORING FOR SAID
PURPOSES TO BE DONE BENEATH THE SURFACE OF SAID LAND AT ANY LEVEL, OR LEVELS,
100 FEET, OR MORE, BELOW THE SURFACE THEREOF, THE SURFACE OPENING OF THE WELL
HOLE TO BE LOCATED ON LAND OTHER THAN THE LAND ABOVE DESCRIBED, AS RESERVED IN
THE DEED FROM BIXBY LAND COMPANY, A CORPORATION, RECORDED AUGUST 25, 1948 IN
BOOK 28072 PAGE 204, OFFICIAL RECORDS, AND RECORDED FEBRUARY 10, 1950 IN BOOK
32238 PAGE 67 OFFICIAL RECORDS AND RECORDED DEC

                                  EXHIBIT "A"
                               Page 2 of 2 Pages

<PAGE>
 
                                                                   EXHIBIT 10.13
                           FIRST AMENDMENT TO LEASE
                           ------------------------

     This First Amendment to Lease ("Amendment") is made, in duplicate, on 
January 24, 1989, pursuant to a minute order adopted by the City Council of the 
- ---------     --
City of Long Beach on August 9, 1988, by and between CITY OF LONG BEACH, a
municipal corporation, ("Landlord") and KILROY LONG BEACH ASSOCIATES, a
California limited partnership, ("Developer".)

     WHEREAS, on July 17, 1985, a Lease was entered into between the Landlord 
and Developer ("Lease"), which Lease demised to Developer to real property 
described in Exhibit "A" to the Lease.

     WHEREAS, a Parcel Map has been filed with the County of Los Angeles on July
22, 1988, as Parcel Map No. 16960, in Book 208, pages 92 through 100, of Parcel 
Maps in the office of the County Recorder of said County ("Parcel Map"). This 
Parcel Map includes the real property demised by the Lease, and other real 
property.

     WHEREAS, pursuant to the provisions of Section 7.6 of the Lease, the Lease
is being subdivided, and following such subdivision of the Lease, there will be
three (3) leases between Landlord and Developer, as follows:

     1. Parcels 5 and 6 of the Parcel Map ("Parcel 5 and 6 Lease").

     2. Parcels 1 and 2 of the Parcel Map ("Parcel 1 and 2 Lease").

     3. This Lease, which shall be reduced in scope and 

                                       1
<PAGE>
 
coverage to include Parcels 3 and 4 of the Parcel Map, and to which an 
additional Parcel 8 of the Parcel Map shall be added.

     WHEREAS, in connection with the subdivision of the Lease referred to in 
this Amendment, Landlord acknowledges that it has received the one time charge 
of Five Thousand and No/100 Dollars ($5,000.00) referred to in the last sentence
of Section 7.6 of the Lease.

     WHEREAS, the parties desire to amend the Lease to accomplish the foregoing 
objectives.

     NOW THEREFORE, the Lease between the parties is hereby amended as follows:

     1. Exhibits "A" and "B", respectively, referred to in the first paragraph 
of Section 1.4 of the Lease, are hereby changed in their entirety to Exhibits 
"A" and "B", respectively, attached to this Amendment and marked Exhibits "A" 
and "B".
     2. Subsection 1.4.1 of the Lease is hereby amended to read in its entirety 
as follows:

          1.4.1 Adjacent Properties. Developer has entered into a separate 
                --------------------
     Lease, dated April 21, 1988, with the Board of Water Commissioners of 
     the City of Long Beach ("Water Department Lease"), for the development of
     certain adjacent properties ("Adjacent Properties") identified in Exhibit
     "B", into the Project for creation of an integrated development. The fair
     market value and fair market Ground Rent and periodic adjustments thereof
     said Adjacent Properties shall be as mutually agreed by said Board of Water

                                       2
      
<PAGE>
 
Commissioners and Developer, and by Landlord, as to that portion of the Premises
under the jurisdiction of Landlord.  Development of the Adjacent Properties 
shall be governed by the Water Department Lease (and Landlord, as to its 
property.)

     3.  Subsection 3.1.1 of the Lease is hereby amended to read as follows:

          3.1.1  Amount of Ground Rent.  Developer shall pay as initial
                 ---------------------
Ground Rent for Parcels 3 and 4 of the Parcel Map, the sum of Three Hundred 
Sixty-Six Thousand Nine Hundred Eighty-Seven and 65/100 Dollars ($366,987.65) 
per year, which is stated by the parties to be ten percent (10%) of the initial 
stated value of the land included in the Premises, which, in turn is agreed by 
the parties to be Three Million Six Hundred Sixty-Nine Thousand Eight Hundred 
Seventy-Six and 50/100 Dollars ($3,669,876.50).  The Ground Rent for Parcel 8 of
the Parcel Map is set forth in Subsection 3.1.4.3.

     4.  Subsection 3.1.2 of the Lease is hereby amended to read in its entirety
as follows:

          3.1.2  Allocation of Ground Rent.  Developer intends to develop
                 -------------------------
Parcels 3 and 4 of the Premises as two (2) distinct parcels, which are 
tentatively identified on the preliminary Parcel Map attached hereto and marked 
Exhibit "C" for reference, with one or more buildings per parcel.  The initial 
Ground Rent obligation described in this subsection 3.1.1 shall be allocated 
among Parcels 3 and 4 in the proportion that the

                                       3

<PAGE>
 
net square footage of land contained in each of said parcels bears to the net 
square footage of the land in both of said Parcels. "Net square footage" of land
means that portion of the land not subject to dedication for public streets and 
sidewalks.

     5. Subsection 3.1.3 of the Lease is hereby amended to read in its entirety
as follows:

          3.1.3 Payment of Ground Rent. The obligation to pay Ground Rent shall 
                ______________________
commence as to the first of Parcels 3 or 4 on the date that construction 
commences on that parcel. The obligation to pay Ground Rent shall commence as to
the second parcel on the earlier of (a) the date that construction commences on 
that parcel, or (b) one parcel every twelve (12) months following commencement 
of construction on the first parcel within the Project. Construction shall be 
deemed to have commenced upon the date of issuance of a foundation permit for 
the first building intended to produce revenue on any given parcel 
("Commencement of Construction"), which was Parcel 2 upon which Commencement of
Construction was May 6, 1986. Commencement of the initial Ground Rent upon all 
subsequent parcels within the Project shall occur, one parcel at a time, in the 
sequence of the numbers of the parcels on the Parcel Map, exclusive of Parcel 8.
However, if Ground Rent is commenced on a parcel in a sequence other than the 
order of numbering of parcels as a result of the commencement of construction on
such parcel, Developer 

                                       4
<PAGE>
 
shall not also be required to commence payment of fifty percent (50%) of Ground 
Rent on the next numbered parcel. At the next date when payment of initial 
Ground Rent is to be commenced, such rent shall be commenced as to the lowest 
numbered remaining parcel. The shift of sequence of required payments resulting 
from construction on parcels in different order than their numbers may delay, 
but shall not permanently terminate the obligation to pay rent as to such 
parcel. 

     6. Subsection 3.1.4.2 is added to the Lease to read as follows:

          3.1.4.2 Parcel 8 Ground Rent. The Ground Rent for Parcel 8 shall be
                  --------------------
eight percent (8%) of the adjusted gross rents received by Developer from
subtenants of Developer upon Parcel 8. As used herein, the term adjusted gross
rents shall mean all rents received from subtenants of Developer on Parcel 8,
less the sum of the following: (i) ten percent (10%) of gross receipts for
administrative and management costs; (ii) ten percent (10%) of gross receipts
for maintenance, replacement and reserves; (iii) real property taxes and
insurance costs for Parcel 8; and (iv) amortization of the costs of construction
of improvements made by Developer to Parcel 8, plus interest thereon at twelve
percent (12%) per annum, amortized over the then remaining term of the Lease
after completion of such improvements to Parcel 8. Section 3.1.7 only of this
Lease shall be applicable to Ground Rent for Parcel 8, and the remainder of the

                                       5
 

<PAGE>
 
provisions of Article 3 (except for new Section 3.12, added to this Amendment, 
below) shall not be applicable to Parcel 8.

     7. Subsection 3.2.2.1 of the Lease is hereby amended to read in its
entirety as follows:

          3.2.2.1 Adjustment for Predevelopment and Infrastructure Costs.
                  ------------------------------------------------------
The fair market land value of the Premises (as agreed upon by Landlord and 
Developer or as determined by appraisal) shall be adjusted ("Adjusted Fair 
Market Land Value") in the proportion that Three Million Six Hundred Sixty-Nine 
Thousand Eight Hundred Seventy-Six and 50/100 Dollars ($3,669,876.50) bears to 
the original stated land value of the Premises of Three Million Six Hundred 
Sixty-Nine Thousand Eight Hundred Seventy-Six and 50/100 Dollars 
($3,669,876.50) plus the pro rata portion of the actual on-site and off-site 
"Predevelopment and Infrastructure Costs" applicable to the Premises, determined
according to Subsection 3.8. The Adjusted Fair Market Land Value shall be 
converted into an annual Ground Rent obligation based on the prevailing rate of
return as determined pursuant to Subsection 3.2.2.

     8. Section 3.8.1 is added to the Lease to read as follows:

          3.8.1 Allocation of Predevelopment and Infrastructure Costs Among 
                ------------------------------------------------------------   
Leases. At such time as Predevelopment and Infrastructure Costs have been
- ------
determined pursuant to Sections 3.6 through 3.11, inclusive, the amount thereof


                                       6

<PAGE>
 
shall be allocated among this Lease, the Parcel 5 and 6 Lease and the Parcel 1 
and 2 Lease in the ratio as the square footage of the area of the Premises 
included in this Lease, exclusive of Parcel 8, bears to the entire square 
footage of the areas included in this Lease, exclusive of Parcel 8, the Parcel 5
and 6 Lease and the Parcel 1 and 2 Lease.

     9.  Section 3.12 is hereby added to the Lease to read as follows:

          3.12 Parcel 8 Access and Improvements.  Access to Parcel 8 has been 
               --------------------------------
provided by a roadway as previously approved by Landlord's Airport Manager.  
Expenditures related to the construction of this roadway, including paving, 
concrete work, utilities, landscaping, and security fences and lights in order
to accommodate FAA requirements, will become Predevelopment and Infrastructure
Costs as defined in Section 3.6, except that the limitation set forth in the
last paragraph of Section 3.8 shall not be applicable to the expenditures
specified in this Section 3.12 if those expenditures cause the limitation in
Section 3.8 to be exceeded. In no event shall the limit of Section 3.8 be
increased by more than the amount by which all other allowed Predevelopment and
Infrastructure Costs plus those permitted in this Section 3.12 exceed that
limit. Any other improvements to Parcel 8 will not be considered "Predevelopment
and Infrastructure Costs."
                                       7
<PAGE>
 
    10.  Subsection 7.1.1 is added to the Lease to read as follows:

          7.1.1  Development of Parcel 8.  Parcel 8 shall be utilized for
                 -----------------------
aviation purposes according to the terms of Sections 7.1, 8.2, 8.3 and 8.5, 
except as provided in this Section 7.1.1, and the Premises, including Parcel 8, 
shall be capable of accommodating at least fifty (50) aircraft.  Construction of
the improvements shall begin within forty-eight (48) months from date of 
execution of this Amendment.  Parking loss on contiguous elements of the 
Premises due to development of access to Parcel 8 may be made up by providing 
parking on a portion of Parcel 8.  Otherwise, Parcel 8 cannot be used to alter 
development rights and obligations on Parcels 1, 2, 3 and 4.  To facilitate more
efficient aircraft usage of Parcels 1, 2, 3 and 4, Developer may shift 
automobile parking onto Parcel 8 so that an equal number of efficiently laid out
auto parking spaces and necessary landscaping lost to aircraft utilization on 
Parcels 1, 2, 3 and 4, can be shifted to an equal number of efficiently laid out
auto parking spaces and necessary landscaping on Parcel 8, subject to approval 
by FAA (where required) and the Airport Manager.  In addition, Developer may 
relocate and construct, at its sole expense, the existing perimeter roadway and 
other easements that would affect the use of Parcel 8 as described above.  If 
approval to relocate the perimeter roadway is not granted by necessary 
governmental auth-

                                       8

<PAGE>
 
orities, then Ground Rent for Parcel 8 will abate until such approval is 
attained, as long as Parcel 8 is not and cannot be utilized as provided herein 
without relocation of the perimeter road.

     11. Section 7.2 of the Lease is hereby amended to read in its entirety as 
follows:

          7.2 Developer's Obligation to Develop Premises. Developer agrees to 
              ------------------------------------------
commence the construction of improvements upon Parcel 3 or Parcel 4 of the 
Premises on or before May 1, 1990, subject to marketing conditions then existing
and the granting of all required governmental approvals and subject to 
subsection 17.3. After completion of the first building on Parcel 3 or Parcel 4,
Developer shall use its best efforts to undertake as expeditiously and fully as
is reasonable possible in the exercise of sound business judgment, the planning
and construction of improvements upon the other of Parcel 3 or Parcel 4 of the
Premises to the end that there will be ultimately constructed as a part of the
Project the development contemplated in the Basic Concept Documents or its
alternative as approved by Landlord pursuant to subsection 7.3.7. Developer
intends to conform to the construction schedule attached as Exhibit "J" entitled
"Construction Schedule" but is not required to do so, except as provided in this
subsection.

     In the event Developer has not commenced construction on the last of either
Parcel 3 or Parcel 4 by January 1, 1993, then the fair market rental value of
said parcel shall be adjusted in the manner set forth in Section 3.2, as of

                                       9 






























<PAGE>
 
January 1993, upon the assumption that the building or buildings planned for 
construction upon said parcel had, in fact, been completed.

     12. Section 7.8 is added to the Lease to read as follows:

          7.8 Subdivision and Combining of Parcel 8. Parcel 8 may be subdivided 
              -------------------------------------
or combined with Parcels 1, 2, 3 and 4 by Developer in a manner approved by the 
Airport Manager in order to permit an interrelated development of not less than 
three (3) acres of aviation facilities with appropriate roadway and taxiway 
access as shown on Exhibit "C-2". This subdivision and combination of Parcel 8 
will be conducted in accordance with the requirement of Sections 7.6 and 7.7. 
Combining portions of Parcel 8 with other portions of the Premises shall not 
affect or lessen the Ground Rent for Parcel 8, nor affect or increase the Ground
Rent for any other portion of the Premises, nor shall the rental adjustments for
other portions of the Premises pursuant to Subsection 3.2 of the Lease be 
affected in any way by reason of the fact that portions of Parcel 8 are combined
with any other portions of the Premises.

     13. Section 8.7 is added to the Lease to read as follows:

          8.7 Use of Parcel 8. Parcel 8 will be used only for aviation uses as
              --------------- 
described in Sections 8.2, 8.3, 8.5, Exhibits "K" and "L", except to the extent
the uses are integrated into development of Parcels 1, 2, 3 and 4 in which case,
corresponding portions of Parcel 8 may be used

                                       10 



<PAGE>
 
for automobile parking. However, aircraft tied down in the row closest to Runway
30, and vehicles parked in that row in automobile parking areas (if any) shall
not exceed a height of nine (9) feet above ground level.

     14. Section 8.8 is added to the Lease to read as follows:

          8.8 Security and Maintenance. Developer will be responsible for 
              ------------------------
security and maintenance of Parcel 8 as required by FAA and the Airport Manager
and as described in Exhibit "K".

     15. Subsection 16.1.1 of the Lease is amended to read as in its entirety as
follows:

          16.1.1 Receipt by Landlord. Developer has, concurrently with the 
                 -------------------
execution and delivery of this Lease, delivered to Landlord a good faith deposit
in the amount of One Million and No/100 Dollars ($1,000,000.00) as security for 
the performance of the obligations of Developer to be performed in accordance 
with the provisions of this Lease. The receipt of the deposit is hereby 
acknowledged by Landlord. The good faith deposit of One Million and No/100
Dollars ($1,000,000.00) previously made by Developer pursuant to the provisions
of Section 16.1 and Subsection 16.1.1 of the Lease shall be allocated to and
held by Landlord in the following amounts with respect to the following leases.

<TABLE> 
<CAPTION> 
                <S>                          <C>
                 This Lease                   $  366,987.65
                 Parcel 5 & 6 Lease              295,428.97
                 Parcel 1 & 2 Lease              337,583.38
                                              -------------
                        Total                 $1,000,000.00

</TABLE>

                                       11
 
<PAGE>
 
     16. Subsection 16.2 of the Lease is hereby amended to read as follows:

          16.2 Construction Security Deposits. Developer has, prior to the 
               ------------------------------
execution and delivery of this Lease, delivered to Landlord a construction 
deposit in the amount of One Million and No/100 Dollars ($1,000,000.00) as 
security for the performance of the obligations of Developer to be performed in 
accordance with the provisions of this Lease. The receipt of the deposit is 
hereby acknowledged by Landlord. The construction security deposit of One 
Million and No/100 Dollars ($1,000,000.00) previously made by Developer pursuant
to the provisions of Section 16.2 of the Lease shall be allocated to and held by
Landlord in the following amounts with respect to the following leases:

<TABLE> 
                       <S>                      <C> 
                        This Lease               $  366,987.65
                        Parcel 5 & 6 Lease          295,428.97
                        Parcel 1 & 2 Lease          337,583.38
                                                 -------------
                               Total             $1,000,000.00

</TABLE> 

     17. Subsection 16.2.4 of the Lease is hereby amended to read in its 
entirety as follows:

          16.2.4 Return of Deposit. Promptly upon Developer's completion of the 
                 ----------------- 
construction of any building improvements upon the Premises and the issuance of 
a Certificate of Occupancy for such improvements, Landlord shall release and 
return to Developer a portion of the deposit described in subsection 16.2 based 
upon the proportion of the number of square feet of building area (as measured 
from 

                                       12
<PAGE>
 
the exterior of exterior building walls) within such completed building 
improvements and to 42,218 square feet of building area. If Developer is not in 
default under this Lease, the balance of such deposit if any, with accrued 
interest shall be returned to Developer upon the occurrence of the Completion 
Date as specified in this Lease.

     18. Except as stated in this First Amendment, the Lease dated July 17,
1985, will remain in effect.

     IN WITNESS WHEREOF, the parties hereto have caused these presents to be 
duly executed in duplicate with all the formalities required by law and the 
respective dates set forth opposite the signatures.

                                       CITY OF LONG BEACH, a municipal
                                       corporation

January 24, 1989                       By: /s/  JAMES C. MANKLA
- ----------    --                           ----------------------------
                                                   City Manager

                                       LANDLORD

                                       KILROY LONG BEACH ASSOCIATES,
                                       a California limited partnership

                                       By: KILROY INDUSTRIES, General Partner

January 5, 1989                        By: /s/  MARSHALL L. McDANIEL
- ---------    --                            ------------------------------
                                                MARSHALL L. McDANIEL
                                       Title: Senior Vice President 
                                              and Secretary 
                                              --------------------------- 

                                       DEVELOPER

                                       13


<PAGE>
 
     The foregoing Amendment to Lease is hereby approved as to form this 18th 
day of January, 1989.

                                       JOHN R. CALHOUN, City Attorney

                                       By: /s/ John R. Calhoun
                                          -----------------------------
                                                               Deputy

                                      14
<PAGE>
 
                          DEVELOPER'S ACKNOWLEDGMENT
                          --------------------------


STATE OF CALIFORNIA     )
                        )  ss.
COUNTY OF LOS ANGELES   )


     On January 5, 1989, before me, the undersigned, a Notary Public in and for 
        ---------
said State, personally appeared Marshall L. McDaniel, personally known to me or 
proved to me on the basis of satisfactory evidence to be the person that 
executed this instrument as Senior Vice President of Kilroy Industries, the 
corporation that executed this instrument as the general partner of KILROY LONG 
BEACH ASSOCIATES, a California Limited Partnership, the partnership that 
executed the within instrument, and acknowledged to me that such corporation 
executed the same as such partner and that said partnership executed the same.

     WITNESS my hand and official seal.

[SEAL]


                                       /s/ Nadine K. Kirk
                                       -----------------------------------
                                       Notary Public in and for said State



[SEAL APPEARS HERE]
<PAGE>
 
                           FIRST AMENDMENT TO LEASE

                                  EXHIBIT "A"

                               LEGAL DESCRIPTION

                    KILROY AIRPORT CENTER, PARCELS 3, 4 & 8


Parcels 3, 4 and 8 of Parcel Map No. 16960, in the City of Long Beach, County 
of Los Angeles, State of California, as per map recorded in Book 208, Pages 92 
through 100 inclusive of Parcel Maps, in the Office of the County Recorder of 
said County.
<PAGE>
 


                              [MAP APPEARS HERE]


                                    MAP OF
                             PARCELS 1 THROUGH 10
                             PARCEL MAP NO. 16960
                              P.M.B. 208 - 92/100
                           IN THE CITY OF LONG BEACH
                             COUNTY OF LOS ANGELES
                              STATE OF CALIFORNIA
                              FOR LEASE PURPOSES


                                  EXHIBIT "B"
                                  Page 1 of 1


<PAGE>
 
                                                                   EXHIBIT 10.14

                      SECOND AMENDMENT TO LEASE AGREEMENT
                      -----------------------------------
                           FOR "PARCELS 3, 4 AND 8"

                                (July 17, 1985)
                                
     The following SECOND AMENDMENT TO LEASE AGREEMENT OF JULY 17, 1985 ("the 
Lease" herein) is made and entered into in duplicate as of the 28th day of
                                                               ---- 
December, 1990, pursuant to a minute order adopted by the City Council of the
- -------- 
City of Long Beach on the 21st day of August, 1990, by and between CITY OF LONG
BEACH, a municipal corporation, hereinafter referred to as "LANDLORD", and
KILROY LONG BEACH ASSOCIATES, a California limited partnership, hereinafter
referred to as "DEVELOPER".

     WHEREAS, on July 17, 1985, the Lease was entered into between the Landlord 
and Developer; and

     WHEREAS, on July 22, 1988, a Parcel Map No. 16960, in Book 208, Pgs. 92 
through 100 of Parcel Maps was recorded in the Office of the County Recorder of 
Los Angeles County, State of California. This Parcel Map included the real
property demised by the Lease and its amendments; and other real property
(Parcel 8); and

     WHEREAS, on January 24, 1989, the All-Inclusive Lease was amended and 
subdivided by a First Amendment to Lease in accordance with Section 7.6 of said 
Lease between Landlord and Developer in order to develop Parcels 5 and 6; and

     WHEREAS, the parties hereto now desire to further amend the said subdivided
Lease for Parcels 3, 4 and 8 in order to

                                      -1-
<PAGE>
 
recognize and clarify certain issues arising out of a Development Agreement 
entered into between the Parties in September 1990;

      NOW, THEREFORE, the Lease between the parties hereto is hereby amended to 
read in its entirety as follows:

      1. Paragraph 3.13 is hereby added to the Lease to read in its entirety as 
follows:

      3.13 Effect of Paragraph 4.01B of Development Agreement on Paragraph 3.11
           --------------------------------------------------------------------
   of Lease.
   --------
      On December 5, 1990, City and Kilroy Long Beach Associates ("Developer" 
  herein) entered into a Development Agreement relating, among other things, to
  Leased Parcels 1-6 as shown on Exhibit "A" of this Amendment. As to such
  parcels, the costs incurred by Developer or any of its successors or assigns
  pursuant to that Development Agreement, including but not limited to
  assessments or payments made in connection with implementation of the Long
  Beach Airport Traffic Mitigation Program as defined in the Development
  Agreement, may, if and as otherwise eligible under this Lease, be considered
  or construed to be costs of items in Subsections 3.11.1, 3.11.2 and 3.11.3 of
  this Lease for the purposes of a credit against future rental increases under
  its terms, and Developer shall thereupon receive any such credit for benefit
  assessments levied or payments made as a direct result of the Development
  Agreement against improvements on Parcels 1-6 under this Lease provided that:
      (1) No such credit shall be granted except as a

                                      -2-
<PAGE>
 
     result of any assessment levied or payments made which are attributable to
     improvements which have been actually constructed on or permitted for
     construction on Parcels 1-6 and, as to such, only on improvements on said
     Parcels not exceeding a cumulative total of 1,085,023 square feet of gross
     usable floor area; and

         (2) Developer shall not be eligible for any credit or interest, and no
     such credit or interest shall accrue, unless and until Developer has first
     actually paid a total of TWO MILLION DOLLARS ($2,000,000) in eligible costs
     under Subsections 3.11.1, 3.11.2 and 3.11.3 of this Lease; and

         (3) Interest shall only be calculated and credited or accrued as to
     payments made and assessments levied and paid which are attributable to
     improvements which have been actually constructed on or permitted for
     construction on Parcels 1-6 at the time Developer becomes eligible for
     credit under Subsection 3.13(2) hereinabove and then only to the extent
     that such amounts are credited against future rental increases within
     thirty (30) days of their payment by Developer. Such interest shall be paid
     at the average of the prime interest rates quoted monthly by Security
     Pacific National Bank or its successor bank during the term that said
     interest is accrued to the date credited; and

         (4) Developer shall not be eligible for any credit or interest under
     the terms of Subsections

                                      -3-
<PAGE>
 
     3.11.1, 3.11.2 and 3.11.3 of this Lease for assessments against or payments
     made relating to any other property wherever located other than the above-
     mentioned Parcels 1-6.

         (5)  As used in this Section 3.13, "gross usable floor area" means 
     gross floor area minus the primary entrance lobby to a building, utility
     and elevator cores, stairwells and bathrooms.

     2.  In the event the Development Agreement alluded to in Paragraph 1 of 
this Amendment has not been executed by the parties on or before January 1, 
1991, this Amendment shall be deemed null and void and of no further force and 
effect.

     IN WITNESS WHEREOF, the parties hereto have caused these presents to be 
duly executed in duplicate with all the formalities required by law and the 
respective dates set forth opposite their signatures.

                                            CITY OF LONG BEACH, a municipal
                                            corporation


December 28, 1990                           By:         [Signature]
                                                 ---------------------------
                                                                City Manager

                                            LANDLORD

                                            KILROY LONG BEACH ASSOCIATES, a
                                            California limited partnership

                                            By:  KILROY INDUSTRIES, General
                                                 Partner

December 21, 1990                           By:  /s/ JOHN B. KILROY, JR.
                                                 ------------------------------
                                                 John B. Kilroy, Jr., President
                                 
                                            DEVELOPER
<PAGE>
 
     The foregoing SECOND AMENDMENT TO LEASE is hereby approved as to form this 
26th day of December, 1990.
- ----        --------

                                       JOHN R. CALHOUN, City Attorney



                                       By        [Signature]
                                          ---------------------------
                                                               Deputy

                                     - 5 -

<PAGE>
 
                          DEVELOPER'S ACKNOWLEDGMENT
                          --------------------------


STATE OF CALIFORNIA     )
                        )  ss.
COUNTY OF LOS ANGELES   )

     On December 21, 1990, before me, the undersigned, a Notary Public in and 
        -----------
for said State, personally appeared John B. Kilroy, Jr. personally known to me 
                                    ------------------
or proved to me on the basis of satisfactory evidence to be the person who 
executed this instrument as President of Kilroy Industries, the corporation that
                            ---------
executed this instrument as the general partner of Kilroy Long Beach Associates,
a California Limited Partnership, the partnership that executed the within
instrument, and acknowledged to me that such corporation executed the same as
such partner and that said partnership executed the same.

     WITNESS my hand and official seal.


[SEAL]


[SEAL APPEARS HERE]
                                       /s/ Jane Gissi
                                       -----------------------------
                                       Notary Public in and for said
                                       County and State
<PAGE>
 
                              AMENDMENT TO LEASE

                                  EXHIBIT "A"

                              CITY OF LONG BEACH
                             COUNTY OF LOS ANGELES
                              STATE OF CALIFORNIA









                              [MAP APPEARS HERE]

                                    1 of 1


<PAGE>
 
                                                                   EXHIBIT 10.15

                      FIRST AMENDMENT TO LEASE AGREEMENT
                      ----------------------------------

                             For "Parcels 5 and 6"

                              (December 30, 1988)


     The following FIRST AMENDMENT TO LEASE OF DECEMBER 30, 1988 ENTITLED "LEASE
AGREEMENT, PARCELS 5 AND 6" (the "Subdivided Lease" herein) is made and entered 
into in duplicate as of the 28th day of December, 1990, pursuant to a minute 
order adopted by the City Council of the City of Long Beach on the 21st day of 
August, 1990, by and between CITY OF LONG BEACH, a municipal corporation, 
hereinafter referred to as "LANDLORD", and KILROY LONG BEACH ASSOCIATES, a 
California limited partnership, hereinafter referred to as "DEVELOPER".

     WHEREAS, on July 17, 1985, a Lease (the "All-Inclusive Lease" herein) was 
entered into between the Landlord and Developer; and

     WHEREAS, on July 22, 1988, a Parcel Map. No. 16960, in Book 208, Pgs. 92 
through 100 of Parcel Maps was recorded in the Office of the County Recorder of 
Los Angeles County, State of California.  This Parcel Map included the real 
property demised by the All-Inclusive Lease and its amendments; and other real 
property (Parcel 8); and

     WHEREAS, on January 24, 1989 the All-Inclusive Lease was amended and 
subdivided by a First Amendment to Lease in accordance with Section 7.6 of said 
Lease between Landlord and Developer in order to develop Parcels 5 and 6; and

     WHEREAS, the parties hereto now desire to amend the

                                      -1-

<PAGE>
 
Subdivided Lease for Parcels 5 and 6, in order to recognize and clarify certain 
issues arising out of a Development Agreement entered into between the Parties
in September 1990;

     NOW, THEREFORE, the Subdivided Lease between the parties hereto is hereby 
amended to read in its entirety as follows:

     1. Paragraph 3.12 is hereby added to the Subdivided Lease to read in its 
entirety as follows:

     3.12 Effect of Paragraph 4.01B of Development Agreement on Paragraph 3.8 of
          ----------------------------------------------------------------------
this Lease.
- -----------
     
     On December 5, 1990, City and Kilroy Long Beach Associates ("Developer" 
herein) entered into a Development Agreement relating, among other things, to 
Leased Parcels 1-6 as shown on Exhibit "A" of this Amendment. As to such 
parcels, the costs incurred by Developer or any of its successors or assigns 
pursuant to that Development Agreement, including but not limited to assessments
or payments made in connection with implementation of the Long Beach Airport 
Traffic Mitigation Program as defined in the Development Agreement, may, if and 
as otherwise eligible under this Lease, be considered or construed to be costs 
of items in Subsections 3.11.1, 3.11.2 and 3.11.3 of the All-Inclusive Lease for
the purposes of a credit against future rental increases under its terms, and 
Developer shall thereupon receive any such credit for benefit assessments levied
or payments made as a direct result of the Development Agreement against 
improvements on

                                      -2-
<PAGE>
 
said Parcels 1-6 under this Lease provided that:

      (1) No such credit shall be granted except as a result of any assessment
levied or payments made which are attributable to improvements which have been
actually constructed on or permitted for construction on said Parcels 1-6 and,
as to such, only on improvements on said Parcels not exceeding a cumulative
total of 1,085,023 square feet of gross usable floor area; and

      (2) Developer shall not be eligible for any credit or interest, and no
such credit or interest shall accrue, unless and until Developer has first
actually paid a total of TWO MILLION DOLLARS ($2,000,000) in eligible costs
under Subsections 3.11.1, 3.11.2 and 3.11.3 of the All-Inclusive Lease; and

      (3) Interest shall only be calculated and credited or accrued as to
payments made and assessments levied and paid which are attributable to
improvements which have been actually constructed on or permitted for
construction on Parcels 1-6 at the time Developer becomes eligible for credit
under Subsection 3.12(2) hereinabove and then only to the extent that such
amounts are not credited against future rental increases within thirty (30) days
of their payment by Developer. Such interest shall be paid at the average or the
prime interest rates quoted monthly by Security Pacific National Bank or its
successor bank during the

                                      -3-
<PAGE>
 
term that said interest is accrued to the date credited; and

      (4) Developer shall not be eligible for any credit or interest under the 
terms of Subsections 3.11.1, 3.11.2 and 3.11.3 of the All-Inclusive Lease for 
assessments against or payments made relating to any other property wherever 
located other than the above-mentioned Parcels 1-6.

      (5) As used in this Section 3.12, "gross usable floor area" means gross 
floor area minus the primary entrance lobby to a building, utility and elevator
cores, stairwells and bathrooms.

       2. In the event the Development Agreement alluded to in Paragraph 1 of 
this Amendment has not been executed by the parties on or before January 1, 
1991, this Amendment shall be deemed null and void and of no further force and 
effect.

       IN WITNESS WHEREOF, the parties hereto have caused these presents to be 
duly executed in duplicate with all the formalities required by law and the 
respective dates set forth

                                      -4-
<PAGE>
 
opposite their signatures.


                                  CITY OF LONG BEACH, a municipal
                                  corporation


December 28, 1990                 By /s/ James C. Mankla
                                     ------------------------------
                                                       City Manager

                                  LANDLORD


                                  KILROY LONG BEACH ASSOCIATES, a 
                                  California limited partnership

                                  By:  KILROY INDUSTRIES, General 
                                       Partner


December 21, 1990                 By /s/ John B. Kilroy, Jr.
                                     ------------------------------
                                     John B. Kilroy, Jr., President

                                  DEVELOPER


     The foregoing FIRST AMENDMENT TO LEASE is hereby approved as to form this 
26th day of December, 1990.

                                  JOHN R. CALHOUN, City Attorney


                                  By /s/ Signature 
                                     ------------------------------
                                                             Deputy

                                      -5-

<PAGE>
 
                          DEVELOPER'S ACKNOWLEDGMENT
                          --------------------------


STATE OF CALIFORNIA    )
                       )  ss.
COUNTY OF LOS ANGELES  )    


     On December 21, 1990, before me, the undersigned, a Notary Public in and
for said State, personally appeared John B. Kilroy, Jr. personally known to me
or proved to me on the basis of satisfactory evidence to be the person who
executed this instrument as President of Kilroy Industries, the corporation that
executed this instrument as the general partner of Kilroy Long Beach Associates,
a California Limited Partnership, the partnership that executed the within
instrument, and acknowledged to me that such corporation executed the same as
such partner and that said partnership executed the same.

     WITNESS my hand and official seal.


                                        /s/ Jane Gissi
    [SEAL APPEARS HERE]                 -----------------------------
                                        Notary Public in and for said
                                        County and State


<PAGE>
 
                              AMENDMENT TO LEASE
 
                                  EXHIBIT "A"

                              CITY OF LONG BEACH
                             COUNTY OF LOS ANGELES
                              STATE OF CALIFORNIA




                              [MAP APPEARS HERE]


                                    1 of 1




<PAGE>
 
                                                                   EXHIBIT 10.16

 
                      THIRD AMENDMENT TO LEASE AGREEMENT
                      ----------------------------------

                             (PARCELS 3, 4 AND 8)


     THIS THIRD AMENDMENT TO LEASE AGREEMENT OF JULY 17, 1985 ("Third 
Amendment") is entered into this 10th day of October, 1994, pursuant to
                                 ----        -------
a minute order adopted by the City Council of the City of Long Beach on the 12th
day of July, 1994, by and between the CITY OF LONG BEACH, a municipal 
corporation ("Landlord"), and KILROY LONG BEACH ASSOCIATES, a California Limited
Partnership ("Developer").

                                   Recitals:
                                   --------

     A.  On July 17, 1985, a lease was entered into between the Landlord and 
Developer (the "Lease"); and 

     B.  On July 22, 1988, a Parcel Map No. 16960, in Book 208, Pages 92 through
100 of Parcel Maps was recorded in the Office of the County Recorder of Los 
Angeles County, State of California; and

     C.  On January 24, 1989, the Lease was amended and subdivided by a First 
Amendment to Lease in accordance with Subsection 7.6 of said Lease between 
Landlord and Developer in order to establish three (3) separate ground leases 
between Landlord and Developer, as follows:

     Parcels 1 and 2     -   Phase 1 of the development

     Parcels 5 and 6     -   Phase 2 of the development

     Parcels 3, 4 and 8  -   Phase 3 of the development

     D.  On December 28, 1990, the subdivided Lease for Parcels 3, 4 and 8 was 
further amended by a Second Amendment to Lease (the Lease plus all amendments 
are hereafter collectively referred to as the "Lease") in order to recognize and
clarify certain issues

                                       1

<PAGE>
 
arising out of a development agreement entered into between the parties in 
September 1990; and 

      E.  The parties now desire to further amend the Lease for Parcels 3, 4 and
8 to provide for payment of past due rental and adjustments to rental payable by
Developer thereunder.

     THE PARTIES AGREE as follows:

     Section 1.  Payment of Past Due Rental.  Landlord and Developer 
                 --------------------------
acknowledge that the initial Ground Rent payable pursuant to Subsection 3.1.1 of
the Lease is past due for the months of August, 1993 through April, 1994 (the
"past due rental"). Landlord hereby agrees to accept the amount of $137,620.35
as payment in full of Ground Rent for all amounts due to Landlord through July
1, 1994, and any and all other delinquent amounts are waived and forgiven. Said
payment shall be made to Landlord upon the first to occur of: (a) commencement
of payment of subtenant rent under the sublease of Parcel 2 to Devry, Inc. or
(b) March 1, 1995. In the event that the past due rental is not fully paid prior
to November 1, 1994, Developer agrees that any past due rental not paid after
that date shall accrue interest at seven percent (7%) per annum until fully
paid.

     Section 2.  Adjustment to Initial Ground Rent.  Subsection 3.1.1 of the 
                 ---------------------------------
Lease is hereby amended to read as follows:

                 "3.1.1. Amount of Ground Rent. Developer shall pay as initial
                         ---------------------
Ground Rent for Parcels 3, 4 and 8 of the Parcel Map, the following amounts
during the following periods from July 1, 1994 through June 30, 1999:

                         3.1.1.1 for the period from July 1, 1994 through June
30, 1995, the sum of Fifty Thousand

                                       2
<PAGE>
 
Dollars ($50,000.00);

          3.1.1.2  For the period from July 1, 1995 through June 30, 1996, the 
sum of Seventy-five Thousand Dollars ($75,000.00);

          3.1.1.3  For the period from July 1, 1996 through June 30, 1997, the 
sum of Seventy-five Thousand Dollars ($75,000.00);

          3.1.1.4  For the period from July 1, 1997 through June 30, 1998, the 
sum of Seventy-five Thousand Dollars ($75,000.00); and

          3.1.1.5  For the period from July 1, 1998 through June 30, 1999, the 
sum of One Hundred Thousand Dollars ($100,000.00)."

     Section 3.  Reactivation of Lease Ground Rent.  Subsection 3.1.3 of the
                 ---------------------------------
Lease is hereby amended to read as follows:

          "3.1.3  Payment of Ground Rent.  The obligation to pay Ground Rent
                  ----------------------
shall commence upon July 1, 1999, or upon the commencement of payment of 
subtenant rent to Developer from either Parcel 3 or Parcel 4, whichever occurs 
first.  In the event that subtenant rent is received from Parcel 3 and not 
Parcel 4, the Ground Rent shall be reduced by 63.11 percent (63.11%).  In the 
event that subtenant rent is received from Parcel 4 and not Parcel 3, the Ground
Rent shall be reduced by 36.89 percent (36.89%)."

     Section 4.  Suspension of Ground Rent for Parcel 8.  During such period of 
                 --------------------------------------
time that Parcel 8 shall be used for parking purposes, no Ground Rent shall be 
due or paid for Parcel 8.

                                       3

<PAGE>
 
          Section 5. Use of Parcel 8. Section 8.7 of the Lease is hereby amended
                     ---------------
to read in its entirety as follows:

               "8.7. Use of Parcel 8. Parcel 8 will be used only for aviation 
                     ---------------
     uses as described in Sections 8.2, 8.3, 8.5, Exhibits 'K' and 'L,' provided
     that in the event approval from the Federal Aviation Administration is
     obtained, Parcel 8 may be used for automobile parking."

          Section 6. Amendment to Legal Description. The legal description 
                     ------------------------------
attached as Exhibit "A" to this Third Amendment shall replace Exhibit "A" to the
Lease.

          Section 7. Amendment to the Site Map. The Site Map attached as Exhibit
                     -------------------------
"B" to this Third Amendment shall replace Exhibit "B" to the Lease.

          Section 8. Except as stated in this Third Amendment, the Lease shall 
remain in full force and effect.

                                       4
<PAGE>
 
     LANDLORD AND DEVELOPER have executed this Third Amendment as of the date 
provided above.

                                       CITY OF LONG BEACH, a 
                                       municipal corporation


October 10, 1994                       By        [signature]
- ----------                                ---------------------------------
                                          Assistant City Manager

                                                      EXECUTED PURSUANT
                                       CITY           TO SECTION 301 OF
                                                      THE CITY CHARTER.

                                       KILROY LONG BEACH ASSOCIATES,
                                       a California Limited
                                       Partnership


September 26, 1994                     By:  KILROY INDUSTRIES, A
- ------------                                California Corporation,
                                            General Partner


                                       By /s/ Marshall L. McDaniel
                                          ---------------------------------
                                       Title  MARSHALL L. McDANIEL
                                              -----------------------------
                                              EXECUTIVE VICE PRESIDENT  
                                       DEVELOPER   AND SECRETARY


     Approved as to form this 3rd day of October, 1994.
                              ---        -------

                                       JOHN R. CALHOUN, City Attorney

                                       By        [signature]
                                          ---------------------------------
                                               Principal Deputy

                                       5
<PAGE>
 
CALIFORNIA ALL-PURPOSE ACKNOWLEDGMENT
 
State of California
         --------------------
County of Los Angeles
          -------------------

On 9/26/94 before me, Loreena D. Yollin, Notary Public
   -------            ---------------------------------------------------------,
    DATE              NAME, TITLE OF OFFICER - E.G., "JANE DOE, NOTARY PUBLIC"

personally appeared Marshall L. McDaniel 
                    -----------------------------------------------------------,
                                        NAME(S) OF SIGNER(S)

[X] personally known to me - OR - [_] proved to me on the basis of satisfactory
                                      evidence to be the person(s) whose name(s)
                                      is/are subscribed to the within instrument
                                      and acknowledged to me that he/she/they
                                      executed the same in his/her/their
                                      authorized capacity(ies), and that by
                                      his/her/their signature(s) on the
[SEAL APPEARS HERE]                   instrument the person(s), or the entity
                                      upon behalf of which the person(s) acted,
                                      executed the instrument.

                                      WITNESS my hand and official seal.


                                      /s/ Loreena D. Yollin
                                      -----------------------------------------
                                                SIGNATURE OF NOTARY


================================== OPTIONAL ====================================

Though the data below is not required by law, it may prove valuable to persons 
relying on the document and could prevent fraudulent reattachment of this form.

<TABLE> 
<CAPTION> 

     CAPACITY CLAIMED BY SIGNER              DESCRIPTION OF ATTACHED DOCUMENT
<S>                                          <C> 
[_] INDIVIDUAL
[_] CORPORATE OFFICER

    ------------------------------           ----------------------------------
              TITLE(S)                           TITLE OR TYPE OF DOCUMENT

[_] PARTNER(S)     [_] LIMITED
                   [_] GENERAL               
                                             ----------------------------------
                                                      NUMBER OF PAGES
[_] ATTORNEY-IN-FACT
[_] TRUSTEE(S)
[_] GUARDIAN/CONSERVATOR
[_] OTHER:
          ------------------------           ----------------------------------
                                                      DATE OF DOCUMENT
    ------------------------------                    

    ------------------------------

SIGNER IS REPRESENTING:                      ---------------------------------- 
NAME OF PERSON(S) OR ENTITY(IES)              SIGNER(S) OTHER THAN NAMED ABOVE
                                            
- ----------------------------------            
                                             
- ----------------------------------           
</TABLE> 

<PAGE>
 
                               LEGAL DESCRIPTION
                          ---------------------------
                             KILROY AIRPORT CENTER
                                LEASE PARCEL 4

Parcel 4 of Parcel Map No. 16960, in the City of Long Beach, County of Los 
Angeles, State of California, as per map recorded in Book 208, Pages 92 to 100, 
inclusive, of Parcel Maps, in the office of the County Recorder of said County.

Along with that portion of Parcel 8 of said Parcel Map No. 16960, lying 
southeasterly of the following described line:

     Beginning at the most northerly corner of said Parcel 4; thence along the
     northeasterly prolongation of the most northwesterly line of said Parcel 4
     North 44 degrees, 37 minutes, 27 seconds East 99.00 feet to a point in the
     northeasterly line of said Parcel 8.

     EXCEPT the northeasterly 11.00 feet of said Lot 8.

     Containing 291,484 square feet or 6.69 acres.

                               LEGAL DESCRIPTION
                          ---------------------------
                             KILROY AIRPORT CENTER
                                LEASE PARCEL 8

That portion of Parcel 8 of Parcel Map No. 16960, in the City of Long Beach, 
County of Los Angeles, State of California, as per map recorded in Book 208, 
Pages 92 to 100, inclusive, of Parcel Maps, in the office of the County Recorder
of said County, lying northwesterly of the following described line:

     Beginning at the most northerly corner of said Parcel 4; thence along the
     northeasterly prolongation of the most northwesterly line of said Parcel 4
     North 44 degrees, 37 minutes, 27 seconds East 99.00 feet to a point in the
     northeasterly line of said Parcel 8.

     Along with the northeasterly 62.00 feet of Parcel 3 of said
     Parcel Map No. 16960.

     EXCEPT the northeasterly 11.00 feet of said Lot 8.

     Containing 163,979 square feet or 3.76 acres.




[SEAL APPEARS HERE]


EXHIBIT A                  PREPARED      CHECKED      LEASE NO.      DRAWING NO.
                           D. OBERT      L. MADDOX                   A-1572


<PAGE>
 
                         [MAP OF KILROY AIRPORT CENTER
                          LEASE AT LONG BEACH AIRPORT]
















                                                             [SEAL APPEARS HERE]

EXHIBIT B                  PREPARED      CHECKED      LEASE NO.      DRAWING NO.
                           D. OBERT      L. MADDOX                   A-1572

<PAGE>
 
                                                                   EXHIBIT 10.17
                                                                             

                               DEVELOPMENT AGREEMENT

                           AIRPORT TRAFFIC STUDY AREA 


                                 *************


                         CITY OF LONG BEACH, CALIFORNIA

                                       and

                          KILROY LONG BEACH ASSOCIATES


                                 *************


                   Approved by Planning Commission July 26, 1990

                     Approved by City Council August 28, 1990

                       Approved by Mayor September 4, 1990



                                ORDINANCE NO. C-6788

                              Effective October 5, 1990 
<PAGE>
 
                                 ERRATA No. 1

               DEVELOPMENT AGREEMENT: AIRPORT TRAFFIC STUDY AREA

                         KILROY LONG BEACH ASSOCIATES


<TABLE>

<S>  <C>                              <C>

1.    Agreement, p. 1, line 12         - Change "("Developer")" to 
                                         "("Developer"  or "Owner")".

2.    Agreement, p. 1, lines 21-22     - Change "is fee owner (long-term lessee,
                                         permittee, etc.) of" to "has a legal
                                         interest as appears herein in".

3.    Agreement, p. 10, line 26        - Change "C-783" to "C-6783".

4.    Agreement, p. 12, line 15        - After "be" add "of".

5.    Agreement, p. 13, line 5         - After "kind" delete "by".

6.    Agreement, p. 32, line 13        - Change "identify" to "indemnify".

7.    Exhibit "I", p. 2, lines 21-22   - Delete existing lines and substitute 
                                         "on said parcels not exceeding a
                                         cumulative total of 1,085,023 square
                                         feet of gross usable floor area; and".

</TABLE>
                                                              November 19, 1990

<PAGE>
 
                               DEVELOPMENT AGREEMENT
                               ---------------------

                           (Airport Traffic Study Area)


                           KILROY LONG BEACH ASSOCIATES

                               *********************

     THIS AGREEMENT is entered into and executed this 5th day of December, 1990,
                                                      ---        --------
between the CITY OF LONG BEACH, a municipal corporation of the State of 
California ("City"), and KILROY LONG BEACH ASSOCIATES, a limited partnership 
formed under the laws of the State of California ("Developer").

          Recitals:
          --------
          R-1. This Agreement concerns all of that real property described in 
Exhibit "A" hereto, which description is incorporated herein by reference and 
referred to as the "Property" herein. The Property is situated in an area of the
City of Long Beach generally known as the Airport Traffic Study Area and shown 
on Exhibit "B" hereto (the "Airport Area" or "Area"). Developer is fee owner 
(long-term lessee, permittee, etc.) of the Property, and desires to develop the 
Property as set forth in the Application for Development Agreement, Exhibit "H" 
hereto, consistent with the zoning for the Property shown in Exhibit "E" of this
Agreement and all other applicable provisions of law.

          R-2. The City has received from a number of the owners, lessees and 
permittees of the land in the Airport Area, 

                                    - 1 -
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including Developer, development proposals and, as noted below, has before it 
analyses of the traffic impacts from those development proposals in order to 
identify measures necessary to mitigate the traffic impacts from development in 
the Airport Area.

          R-3. The City supports development in the Airport Area in order to 
create private sector economic prosperity and employment opportunities, to 
increase City income through taxes and property leases,and to enhance the 
economic vitality of the Area.

          R-4. The recent traffic studies undertaken for the City by the firm of
Barton-Aschman Associates, Inc. indicate that the level of service on existing 
roads and intersections in the Long Beach Airport Traffic Study Area will 
deteriorate to an unacceptable level as a result of projected new private growth
and development.

          R-5. Current property owners, lessees and developers in the Airport 
Area have been meeting regularly with City officials since May 1987 to design a 
program to mitigate the anticipated traffic impacts of their new development.

          R-6. A Traffic Mitigation Program ("TMP") has been designed by the 
City, in cooperation with major current property owners, lessees and developers,
to provide for roadway and intersection improvements necessary for the 
maintenance of adequate levels of transportation service (generally "Level of 
Service D" or better) throughout the Airport Area as land is developed. The TMP 
is described generally in Section 2.06 and in detail in Exhibit "G" of this 
Agreement. 

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<PAGE>
 
          R-7. Completion of the Project will require a substantial investment 
of money and planning and design effort, and uncertainty that the Project may be
developed in accordance with known zoning regulations might result in a waste of
public and private resources, escalate the cost of development and discourage 
participation in the Traffic Mitigation Program. Because it is possible that 
zoning regulations might change during preliminary project stages, there is a 
disincentive for a landowner to invest monies in the early completion of the 
major infrastructure and other public or private improvements relating to any 
project, or in early comprehensive planning and design studies.

          R-8. To overcome this kind of disincentive and to provide the 
opportunity for an early commitment by cities and counties to a landowner that a
proposed project may be completed consistent with defined zoning regulations, 
the State of California has enacted Government Code Section 65864, et seq., 
which authorizes the City to enter into binding development agreements with 
persons having legal or equitable interests in real property for the development
of such property in order to, among other things: encourage and provide for the 
development of public facilities in order to support private development
projects; provide certainty in the approval of development projects in order to
avoid waste of resources and the escalation in Project costs and to encourage
investment in and commitment to comprehensive planning which will make maximum
efficient utilization of resources at the least economic cost to the public;
provide assurance to the applicants of development

                                    - 3 -

<PAGE>
 
projects that (1) they may proceed with their projects in accordance with the 
existing policies, rules and regulations set forth in and subject to the 
Agreement, subject to the conditions of approval of such projects and provisions
of such Development Agreements, and (2) encourage private participation in 
comprehensive planning and reduce the private and public economic costs of 
development.

          R-9. As set forth in the public documents and testimony in support of 
the approval of this Agreement, the Project and the Developer's participation in
the TMP will result in a number of public benefits, including assuring the 
provision of certain public improvements necessitated by development in the 
Airport Area, as well as substantial private economic benefit to the Developer.

          R-10. In order to enhance the likelihood of full implementation of the
TMP in a way that will assure the citizens of Long Beach that the traffic 
impacts of development in the Airport Area will be fully mitigated while, at the
same time, assuring Developer that it will be able to plan and complete 
development under zoning that will justify its cost in an accelerated 
participation in the TMP, the City is prepared to enter into this Agreement to 
set forth the rights and obligations of Developer to complete its development up
to the limit established in the current Planned Development Ordinance applicable
to Developer's Property and require Developer's participation in the TMP.

          R-11. Prior to approving the Project and entering into this Agreement,
the City, as lead agency, has reviewed and 

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<PAGE>
 
considered the potential adverse impacts related to the Project and the TMP in 
compliance with the California Environmental Quality Act, and has further 
reviewed and considered projected future regional and cumulative infrastructure 
and utility demands and available capacities for projected development in the 
Airport Area.

          R-12. After assessing these and other potential adverse environmental
impacts associated with the Project and the TMP, the City has imposed mitigation
measures as a part of the Project to the fullest extent the City considers 
feasible, including, among other things, requiring that, prior to final 
completion and occupancy of the Project, Developer commit to contributing the 
Project's full, fairly allocated share of the costs required to maintain an 
adequate level of service on roadways and intersections. The City has determined
that no other or additional adverse impacts will result from entering into this 
Agreement in addition to those already considered in connection with the Project
and the TMP and has issued Negative Declaration 49-89 in connection herewith.

          R-13. In view of the foregoing, pursuant to the authorizations set
forth in California Government Code Section 65864, et seq., City has adopted
rules and regulations establishing procedures and requirements for consideration
and execution of development agreements by City. A copy of that portion of the
Long Beach Municipal Code embodying those rules and regulations is attached and
incorporated in this Agreement as Exhibit "D". In accordance with those rules
and regulations, and in accordance with the powers and authorization provided in

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<PAGE>
 
Government Code Section 65864, et seq., City has undertaken the necessary 
proceedings, has found and determined that this Agreement is consistent with 
City's General Plan, and has adopted Ordinance No. C-6788 approving this 
Agreement, which ordinance became effective on October 5, 1990.

                                AGREEMENT
                                ---------

     NOW, THEREFORE, in consideration of the above recitals and of the mutual 
covenants hereafter contained, and for the purposes stated above, City and 
Developer hereby agree as follows:

                         I. CONSTRUCTION OF AGREEMENT
                            -------------------------

          1.01 Underlying Law.
               --------------

          A. This Agreement shall be governed by and interpreted in light of the
findings and provisions contained in Article 2.5, Chapter 4, Division 1, Title 7
of the California Government Code (Sections 65864, et seq.), Chapter 21.29 of 
the Long Beach Municipal Code and Ordinance No. C-6788 of the City of Long 
Beach. The parties hereto each agree that the validity and enforcement of this 
Agreement may be upheld under authority of the above-referenced source of law as
well as that arising out of the Charter of the City of Long Beach. It is their 
mutual understanding and belief that this Agreement has been authorized in 
accordance with all applicable procedures and provisions of law, that it is 
entered into in good faith pursuant to, and constitutes a proper exercise of, 
statutory and chartered City powers, by the City, and that, under California law
as it exists at the time of execution of this Agreement, its terms are fully 
enforceable against all challenges and attacks

                                    - 6 -
<PAGE>
 
including those that might be brought by parties and persons not parties to the 
Agreement.

          B. In construing the provisions of this Agreement and in resolving 
inconsistencies among the various documents comprising or incorporated in this 
Agreement, every reasonable effort shall be made to construe all such documents 
to be mutually consistent and compatible. Failing this, precedence shall be 
given in the following order to:

               (a) This Agreement;

               (b) The applicable Planned Development Ordinance (Exhibit "E");

               (c) Environmental documentation filed in connection with the 
approval of this Agreement consisting of Negative Declaration 49-89 which 
incorporates the following by reference:

               Negative Declaration (ND-62-88) State Farm,

               Negative Declaration (ND-17-88) Bircher/Elks,

               Negative Declaration (ND-51-88) Embassy Suites Hotel,

               Environmental Review Record (ND-84-79) Long Beach/Signal Hill 
                    Business Park,
 
               Environmental Impact Report (E-10-82) Alamitos Land Company,

               Environmental Impact Report (E-26-88) Land Use Element of the 
                    General Plan,

               Environmental Impact Report (E-42-86) McDonnell Douglas Plant 
                    Expansion,

               Environmental Impact Report (E-30-85) Douglas Center,

               Environmental Impact Report (E-45-85) Long Beach


                                    - 7 -
<PAGE>
 
                Airport, and

               Environmental Impact Report (E-37-84) Kilroy Airport Center.

               1.02 Definitions.
                    -----------

          A. when used in this Agreement, the following terms shall be defined 
as follows:

               1. "Agreement" means this Development Agreement.

               2. "Assessment District" means any assessment district formed 
under applicable State or Long Beach laws for the purpose of funding
construction of improvements listed in the TMP, including, but not limited to,
Long Beach Assessment District 90-2.

               3. "City" means the City of Long Beach, California.

               4. "Circulation Improvements" means those certain improvements 
included within the Long Beach Airport Area Traffic Mitigation Program.

               5. "Development" means the improvement of the Property for the 
purposes of constructing the structures, improvements and facilities comprising
the Project, including, without limitation: grading, the construction of
infrastructure and public facilities related to the Project whether located
within or outside the Property; the construction of structures and buildings; 
and the installation of landscaping; but not including the maintenance, repair,
reconstruction or redevelopment of any structures, improvements or facilities
after the construction and completion thereof.

               6. "Development Approval" means any action required to be taken 
by City in order to approve implementation of the

                                    - 8 - 


<PAGE>
 
Project, including, but not limited to, site plan review, subdivision and
parcel maps, variances, conditional use permits, grading permits and building
permits.

          7. "Effective Date" means the date on which this Agreement as fully 
executed is recorded in the Office of the Recorder of Los Angeles County.

          8. "Long Beach Airport Traffic Mitigation Program" or "TMP" means the 
cooperative construction and traffic management program through which traffic 
generated by development and background traffic in the Study Area can be 
accommodated without causing a decline in the existing transportation level of 
service, as more fully set forth in Exhibit "G" hereto.

          9. "Long Beach Airport Traffic Study Area" or "Study Area" means that 
Area within which the Property is located as more fully set forth in
Exhibit "B" hereto.

          10. "Mortgage" means a contract by which specific property, including 
an estate for years in real property, is hypothecated for the performance of an 
act, without the necessity of a change of possession.

          11. "Mortgagee" means a mortgagee of a mortgage, a beneficiary under a
deed of trust, or any other lender holding a security interest in the Property, 
and their successors and assigns.

          12. "Project" means the Development of the Property as permitted by 
the Planned Development Ordinance applicable to the Property (Exhibit "E").

          13. "Property" means the real property described on Exhibit "A" to 
this Agreement.

                                      -9-
<PAGE>
 
          1.03 Exhibits.
               --------

          A. The following documents are attached to and have been or are hereby
made a part of this Agreement:

1. Exhibit "A"  -  Legal description of property subject to the Agreement. 

2. Exhibit "B"  -  Map of the Airport Traffic Study Area.

3. Exhibit "C"  -  List of roadway and intersection improvements to be installed
                   under Assessment District totalling $12.004 million, the so-
                   called "Phase I Improvements".

4. Exhibit "D"  -  Chapter 21.29 of the Long Beach Municipal Code.

5. Exhibit "E"  -  The Planned Development Ordinance applicable to the Property.

6. Exhibit "F"  -  Negative Declaration.

7. Exhibit "G"  -  The Full Transportation Mitigation Program.

8. Exhibit "H"  -  Application for Development Agreement.

9. Exhibit "I"  -  Form of Amendment to Lease.

                        II. OBLIGATIONS OF THE PARTIES
                            --------------------------

         2.01 Development Plan.
              ----------------

          A. City agrees that the permitted uses of the property, and the 
intensity and density of such uses, shall be as set forth in the Planned 
Development Ordinance (the "Ordinance") (Ordinance No. C-6783) applicable to the
Property on the Effective Date of this Agreement, which Ordinance is 
incorporated in this Agreement as Exhibit "E".

                                     -10-
<PAGE>
 
          B. It is understood and agreed that, in accordance with the Planned 
Development Ordinance as set forth in Exhibit "E", as to Parcel "A", Developer 
may develop structures on said Parcel "A" of up to 1,490,000 square feet of 
gross usable floor area for business office use and 220 hotel rooms, or any 
comparable combination of uses permitted by the ordinance set forth in Exhibit 
"E" provided that such uses are approved by City in accordance with procedures 
set forth in that ordinance and that any proposed mixed-use development does not
generate more evening peak hour trips, as calculated using Trip Generation, 
Institute of Traffic Engineers, Fourth Edition, 1987, than would be generated by
said office and hotel use, and, as to Parcel "B", may, subject to termination as
set forth in this Agreement, develop structures of up to 500,000 square feet of
gross usable floor area on said Parcel "B" as permitted by the Planned
Development Ordinance as set forth in Exhibit "E".

          1. In relation to Parcel "B", City's Water Department ("WD") is
undertaking studies of the feasibility of developing certain real property owned
by City (herein referred to as the "Water Site") in a way that would combine
water treatment uses on the site with compatible commercial uses. That real
property is shown in Exhibit "A" as Parcel "B". Should the Water Department
determine that such multi-use development of its property is lawful, feasible
and desirable, one of many alternatives it might wish to consider would be entry
into an agreement with Developer for the development of the Water Site under
this Agreement. In this regard, Developer has initiated discussions, on a non-
exclusive basis, with "WD" through its Board of Water

                                     -11-
<PAGE>
 
Commissioners concerning the possibility of Developer's acquiring a long-term 
leasehold or similar interest in the Water Site for the purpose of development 
of the Water Site in a manner consistent with the Agreement and compatible with 
WD's planned use of the Water Site for water storage, treatment and related 
uses.

          2. In the event that Developer and the City of Long Beach, through its
Board of Water Commissioners, have entered into a lease or other document for a 
term of at least twenty (20) years with respect to Parcel "B" prior to January 
1, 1992, this Agreement as it relates to Parcel "B" shall continue in full force
and effect thereafter. If such a document has not been duly executed and is not 
in effect prior to January 1, 1992, this Subsection 2.01B shall thereupon be 
deemed repealed and shall be no further force and effect, and this Agreement
shall terminate and be of no further force and effect with respect to Parcel "B"
as shown on Exhibit "A". It is understood and agreed by the parties hereto that
nothing in this Agreement obligates or requires the City of Long Beach, through
its Board of Water Commissioners, either to initiate any studies, to take any
action, to negotiate with Developer or to enter into a long-term lease or other
document with Developer with respect to Parcel "B".

          3. Notwithstanding any other provision of this Agreement, Developer 
shall have no right to assert and shall not assert or exercise any rights to 
Parcel "B" arising out of this Agreement, of any kind or nature whatsoever, at 
any time, unless and until:

                                     -12-
<PAGE>
 
          a. Except as may otherwise be agreed upon in writing by City and 
Developer, all costs, expenses and assessments of any and every kind relating to
Parcel "B" arising out of Developer's obligations under this Agreement shall in 
no way constitute a claim, charge or offset of any kind by whatsoever by 
Developer against City; and

          b. Developer is legally obligated to participate in an assessment 
district, or has paid a development impact fee, or a combination thereof, to 
fully mitigate, in accordance with the TMP, all traffic impacts arising out of 
Developer's exercise of rights under this Agreement relating to Parcel "B".

          Upon, and only upon, satisfaction of the foregoing Conditions a 
through b, prior to July 1, 1992, Developer may exercise whatever rights it may 
have hereunder relating to Parcel "B". If Developer fails to satisfy such 
conditions prior to July 1, 1992, then on and after July 1, 1992, all such 
rights it may have on or relating to Parcel "B" shall terminate and be deemed of
no further force and effect. Unless and until a long-term lease or other 
document is entered into between City and Developer, it is understood and agreed
that any rights Developer has or may have in and relating to Parcel "B", are not
transferable, assignable or in any way attributable to any other lot, parcel or 
property wherever located and may not be so transferred, assigned or attributed 
by Developer. Nothing in this Agreement shall be deemed to vest Developer with 
any increased traffic impact benefits for Parcel "B" unless and until all 
requirements of the TMP relating to such benefits are satisfied.

                                     -13-
<PAGE>
 
          C. It is understood and agreed that the City's Director of Planning 
and Building may interpret provisions of the TMP and the Planned Development 
Ordinance to the extent that such interpretations are necessary to resolve 
uncertainties in such documents and to the extent that the resolution of such 
uncertainties are minor in nature, do not result in any increased traffic 
generation and are found by the Director to be fully consistent with the intent 
of this Agreement and the Planned Development Ordinance.

          2.02 Controlling Land Use Regulations.
               --------------------------------

          The land uses on the Property, including, but not limited to, maximum 
allowable size and height of all structures shall be as provided in the Planned 
Development Ordinance No. C-6783 attached hereto as Exhibit "E".

          2.03 Development Rights and Future Approvals.
               ---------------------------------------

          A. To the extent provided by, and only by, Government Code Sections 
65864, et seq., the City agrees that all development rights to develop the 
Project granted to Developer by this Agreement are to be deemed vested in 
Developer.

          B. Before Owner can begin grading or any other developmental work 
relating to the Project on the Property, Owner must secure several additional 
Development Approvals. The parties agree that to the extent such Development 
Approvals implement the Project contained in this Agreement, City shall not, 
through the enactment or enforcement of any subsequent ordinances, rules,
regulations, initiatives, policies, requirements, guidelines or other
constraints, withhold or delay Development Approvals beyond the applicable time
frame of City's

                                     -14-
<PAGE>
 
normal administrative processes. City and Owner shall use their best efforts to 
ensure each other that all applications for and approvals of grading permits, 
building permits or other Developmental Approvals necessary for Owner to develop
the Property are sought and processed in a timely manner within the City's 
normal administrative processes and consistent with all terms and conditions of 
this Agreement and applicable law.

          2.04 Effect of Change in Zoning and Other City Regulations.
               -----------------------------------------------------

          A. Notwithstanding the provisions of Section 2.03, it is understood 
and agreed that City zoning regulations of general application adopted or 
amended after execution of this Agreement will be applicable to subsequent 
Development Approvals, if any, relating to the Property unless they materially 
conflict with the regulations set forth in Exhibit "E" of this Agreement or 
materially impede, restrict or delay development of the Property for the uses 
and in the manner permitted in said Exhibit "E", not including any normal time 
of processing relating to such subsequent Development Approvals.

          B. It is understood and agreed that this Development Agreement shall 
not prevent the City, during the Term of the Agreement, from applying new rules,
regulations and policies other than those referred to in Subsection 2.04A which 
do not conflict with those rules, regulations and policies applicable to the 
Property, nor shall this Development Agreement prevent the City from denying or 
conditionally approving any subsequent development project applications on the 
basis of such existing or new rules, regulations and policies, unless they 
materially

                                     -15-
<PAGE>
 
conflict with the regulations set forth in Exhibit "E" of this Agreement or 
materially impede, restrict or delay development of the Property for the uses 
and in the manner permitted in said Exhibit "E", not including any normal time 
of processing relating to such subsequent Development Approvals.

           2.05 Compliance With All Other Laws.
                ------------------------------

          Except as otherwise provided in Sections 2.01, 2.02, 2.03 and 2.04 of 
this Agreement, Developer shall comply with all provisions of law as they now 
exist, or may subsequently be amended, as they apply or may apply to the 
Property subject to this Agreement. In this regard, both City and Owner intend 
that this Development Agreement is a legally binding contract which will 
supersede any inconsistent initiative, measure, moratorium, referendum, statute,
ordinance or other limitation (whether relating to the rate, timing or 
sequencing of the Project or construction of all or any part of the Project and
whether enacted by initiative or otherwise) affecting parcel or subdivision maps
(whether tentative, vesting tentative or final), building permits, occupancy
certificates or other entitlements approved, issued or granted within the City,
or portions of the City. Should an initiative, measure, moratorium, referendum,
statute, ordinance or other limitation inconsistent with this Agreement be
enacted by the citizens of City which would preclude or impede, restrict or
delay construction of all or any part of the Project, and to the extent such
initiative, measure, moratorium, referendum, statute, ordinance or other
limitation be determined by a court of competent jurisdiction to invalidate or
prevail over all or any part of this Development Agreement,

                                     -16-
<PAGE>
 
Owner shall have no recourse against City pursuant to this Development 
Agreement, but shall retain all other rights, claims and causes of action under 
this Development Agreement not so invalidated and any and all other rights, 
claims and causes of action at law or in equity which Owner may have independent
of this Development Agreement with respect to the Project, provided that in no
event shall Developer have any right to attach, set aside, receive reimbursement
from or for or in any other way be relieved from any requirements or obligations
entered into by it as a part of implementation of the TMP, including, but not
limited to, Assessment Districts formed or impact fees imposed as a part of the
TMP, provided that nothing in this Agreement shall be construed to preclude
Developer from receiving any refund from such Assessment Districts to which he
may be lawfully entitled under the terms and conditions of an applicable
assessment district procedure, if any. The foregoing shall not be deemed to
limit Owner's right to appeal any such determination that such initiative,
measure, moratorium, referendum, statute, ordinance or other limitation
invalidates or prevails over all or any part of this Development Agreement. City
agrees to cooperate with Owner in all reasonable manners in order to keep this
Development Agreement in full force and effect, provided Owner shall reimburse
City for all of its costs and expenses incurred directly or indirectly in
connection with such cooperation and City shall not be obligated to institute a
lawsuit or other court proceedings in this connection and, if it does so,
Developer shall fully bear City's costs of such suit or proceedings.

                                     -17-
<PAGE>
 
          2.06 Obligations of Developer.
               ------------------------

          A. Developer shall, at all times during the term of this Agreement, be
bound by and fully comply with all parts, terms and conditions of the TMP as set
forth in Exhibit "G" of this Agreement. In this regard, Developer shall be 
obliged to, among, but not necessarily limited to, the following other things, 
fully support formation of, and participate in: (1) an Assessment District to 
construct roadway and intersection improvements valued at TWELVE MILLION, FOUR 
THOUSAND DOLLARS ($12,004,000), provided that Developer's assessment shall not 
exceed the value of the benefits received, as determined by the Assessment 
Engineer's cost allocation as provided by law under such a district; (2) another
Assessment District, a development fee and/or other funding mechanisms as may be
necessary to construct the remaining roadway and intersection improvements in 
the TMP, now valued at ELEVEN MILLION, TWO HUNDRED SIXTY-FIVE THOUSAND DOLLARS 
($11,265,000); and, a demand management program on an area-wide or subarea 
basis, designed to reduce peak hour automobile trips by at least twenty percent 
(20%). City may from time to time modify the list of improvements described in 
the TMP, provided that the modification accomplishes essentially the same 
beneficial effect on traffic mitigation as the original list and does not 
substantially increase developer's costs arising out of this Section.

          B. In the event that Developer and the Water Department enter into an 
agreement for the long-term (at least twenty years) use of the Water Site, then 
Developer shall mitigate the trips to be generated by the additional 500,000

                                     -18-
<PAGE>
 
square feet of gross usable floor area in accordance with the provisions of the 
Planned Development Ordinance. This obligation shall be met either by payment 
in full of the development impact fee, or by posting security to guarantee 
payment of the fee as building permits are sought and received for individual 
buildings, or through amendment of the Assessment District to spread a lien 
across Developer's long-term interest in the WD site, whichever alternative 
shall be selected by City. At the time of execution of this Agreement, it is 
contemplated by City and Developer that this obligation will be met by amendment
of Assessment District 90-2 to include Developer's interest in Parcel "B" in 
those proceedings. If Developer has not, prior to January 1, 1992, entered into 
such a long-term agreement and, prior to July 1, 1992, fully met its obligation 
to mitigate in accordance with the TMP, then on and after July 1, 1992, this 
Agreement, as it relates to Parcel "B", shall terminate and be deemed of no 
further force and effect, and Developer shall have no recourse against City or 
Water Department.

          2.07 Result of Failure of Developer to Meet All Obligations;
               ------------------------------------------------------- 
               Procedure to Cure.
               -----------------

          A. Except as provided in Subsection 2.07B, in the event that Developer
fails to initiate and fulfill all of its obligations under Section 2.06 of this 
Agreement, or should Developer, at any time during the term of this Agreement, 
fail to comply with all such obligations, then the provisions of Sections 2.01,
2.02, 2.03 and 2.04 shall be of no further force and effect to preclude City
from revising any or all zoning regulations affecting the Property or fully
enforcing such

                                     - 19 -

<PAGE>
 
revised regulations as they may affect the Property.

          B. Prior to implementation of any action by City pursuant to 
Subsection 2.07A, City shall give Developer notice of its intention to take such
action. Such notice shall be given to Developer in writing and shall set forth 
and specify the nature of the failure or failures of Developer under this 
Agreement and shall also describe the action City intends to take as a result of
such failure. Within fifteen (15) days of the receipt of such notice, Developer 
shall notify City of its response to such notice including, as appropriate, a 
detailed outline, with time schedule, of Developer's plan to cure the failure or
failures. Developer shall have thirty (30) days following such notice to cure 
such failure or failures. If Developer's failure or failures cannot reasonably 
be cured in thirty (30) days, Developer shall not be in default if Developer 
begins to cure within the thirty-day period and diligently proceeds to cure to 
completion. In the event of failure of Developer to cure, or diligently proceed 
toward cure within thirty (30) days, City may thereupon notify Developer of its 
default and hereafter take such action under Subsection 2.07A or 2.07C as it 
deems appropriate.

          C. Upon a default by Developer and following notice and opportunity to
cure pursuant to Subsection 2.07B, the City may, upon recommendation of its 
Director of Planning and Building, proceed to terminate or modify the 
Development Agreement. Said recommendation shall be forwarded to the Planning 
Commission and the City Council, each of whom shall hold a public hearing after 
giving notice as provided in

                                    - 20 -
<PAGE>
 
Government Code Sections 65090 and 65091, and if the City Council, following 
such hearing, finds that Developer is in default, termination or modification 
may be undertaken unilaterally by the City Council.

          2.08 Obligations of City.
               -------------------

      In addition to any other specific duties or responsibilities assigned it 
under this Agreement, City shall:

          A. Cooperate reasonably with Developer in Developer's efforts to meet 
its obligations under this Agreement.

          B. At the time of consideration of any City-wide development fee 
ordinance a purpose of which is alleviation of traffic impacts arising from new 
development, prepare language providing for a credit against such a City-wide 
development fee. The language shall be incorporated into that ordinance and 
shall provide that a credit shall be given against the City-wide fee for the 
principal amount of any assessment that has been paid by Developer, or which 
Developer is legally obligated to pay under applicable assessment district 
provisions, as well as for any Airport Area development fee which Developer has 
paid under the Airport Traffic Mitigation Program. The credit shall be applied 
only for buildings for which building permits are applied for and received after
the enactment of such a City-wide development fee and shall be established and 
apportioned by City's Director of Planning and Building on a 
building-by-building basis as building permits are applied for and received in 
an amount equal to the amount paid by the Developer for an Airport Area Traffic 
Impact Fee and/or the principal amount of an Airport Area Traffic Mitigation 
Assessment District for which the Developer 

                                    - 21 -
<PAGE>
 
is legally obligated. In no event shall the amount of the credit exceed the 
amount of the City-wide fee applicable to the building in question.

          2.09 Reserved Authority of City.
               --------------------------

          A. In the event that the State or Federal laws or regulations enacted 
after this Development Agreement has been entered into, prevent or preclude 
compliance with one or more provisions of the Development Agreement, such
provisions of the Development Agreement shall be modified or suspended as may be
necessary to comply with such State or Federal laws or regulations; provided,
however, that this Development Agreement shall remain in full force and effect
to the extent it is not inconsistent with such laws or regulations and to the
extent such laws or regulations do not render such remaining provisions
unenforceable, provided that, prior to City's adopting or undertaking any rule,
regulation or policy the purpose of which is to conform to State or Federal laws
or regulations under this Subsection 2.09A which is inconsistent with this
Development Agreement, City shall make a finding that such rule, regulation or
policy is reasonably necessary to comply with such State or Federal laws or
regulations.

          B. This Development Agreement shall not prevent City from applying 
new rules, regulations and policies contained in uniform codes, including, but 
not limited to, the Uniform Building Code, Uniform Electrical Code, Uniform 
Mechanical Code or Uniform Fire Code, which are based on recommendations of a 
multi-state professional organization and become applicable throughout City.

                                    - 22 -
<PAGE>
 
          C. This Development Agreement shall not prevent City from adopting 
other new rules, regulations and policies, consistent or inconsistent with this 
Development Agreement which directly result from findings by City that failure 
to adopt such rules, regulations or policies would result in a condition 
injurious or detrimental to the public health and safety. Notwithstanding the 
foregoing, City shall not adopt any such rules, regulations or policies which 
prevent or preclude compliance with one or more provisions of this Development 
Agreement until City makes a finding that such rules, regulations or policies 
are reasonably necessary to correct or avoid such injurious or detrimental 
condition.

          D. The Development Agreement shall not prevent City from freely 
exercising any of its powers, including the adoption and amendment of rules, 
regulations and policies not restricted by one or more sections of this 
Development Agreement.

          E. Notwithstanding any other provisions of this Agreement, all fees 
and charges intended to cover City costs associated with processing development 
of the Property, including, but not limited to, fees and charges for 
applications, processing, inspections, plan review, plan processing and/or 
environmental review, which are existing or may be revised or adopted during the
term of this Agreement, shall apply to the development of the Property.

               III. ENVIRONMENTAL REVIEW
                    --------------------

          3.01 Supplemental or Subsequent Environmental Review.
               -----------------------------------------------

          A. In approving the Project and entering into this  

                                    - 23 -
<PAGE>
 
Agreement, the City as lead agency has reviewed and considered the potential 
adverse environmental impacts related to the Project, and has further reviewed 
and considered projected future regional and cumulative infrastructure and 
utility demands that will compete with the Project for available capacities and 
cumulatively add to potential adverse impacts. Consequently, the City has 
prepared and certified Negative Declaration No. 49-89 ("ND"), and that document 
is attached hereto as Exhibit "F". Developer agrees that it shall be legally 
bound by all parts and provisions of the ND applicable to the Property, 
including, but not limited to, all terms, conditions and mitigation measures of 
that ND and all discretionary approvals relating thereto.

          B. City agrees that, to the extent permitted by law, no subsequent or 
supplemental environmental review shall be required by the City for subsequent 
discretionary approvals provided that such approvals do not involve any changes 
or modifications to the Planned Development Ordinance or the TMP as set forth in
the Negative Declaration.

          3.02 Treatment of Nearby Projects.
               ----------------------------

     City agrees to cooperate with Developer in sharing, on request of 
Developer, public information which City may have relating to projects and 
proposed projects of or subject to review and approval by any agency or 
department of the United States or the State of California, or any local agency 
or entity, which are to be undertaken within five (5) miles of the Property.

                                    - 24 -
<PAGE>
 
                         IV. GENERAL PROVISIONS
                             ------------------

          4.01 Effectiveness of Agreement.
               --------------------------

          A. This Agreement shall be effective upon its execution by a duly 
authorized representative of both parties and the recording of this Agreement 
pursuant to Government Code Section 65868.5.

          B. On July 17, 1985, City and Developer entered into a Lease Agreement
(the "Underlying Lease" herein) for the lease of certain real property owned by 
City for the purpose of developing that property. That document has been 
subsequently both amended and trifurcated. Under Section 3.11 of the Underlying 
Lease, the Lessee (Developer) is entitled to a credit against future increases 
in Ground Rent should certain defined costs paid by Developer exceed a certain 
defined level. In order to set forth the methodology of treatment of Developer 
costs under this Agreement to the extent they may be eligible for credit against
future rental increases under the terms of the Underlying Lease, it is necessary
that City and Developer enter into amendment/amendments to the applicable 
lease/leases. Thus, and notwithstanding any other provision of this Agreement, 
this Agreement shall not become effective until an amendment to the applicable 
lease/leases has been executed by City and Developer expressing their mutual 
intent and understanding as to a methodology for treatment of eligible costs 
under the lease/leases, provided that execution by City and Developer of an 
amendment to the lease/leases in substantially the form of Exhibit "I" of this 
Agreement shall be deemed to satisfy the requirements of this Subsection and it 
shall thereupon be of no 

                                    - 25 -
<PAGE>
 
further force and effect.

          4.02 Duration (Term) of Agreement.
               ----------------------------

     This Agreement shall remain in effect for a term of twenty (20) years, 
subject to earlier termination for cause as set forth in Section 2.07 or Section
4.05, or upon release of Developer by City.

          4.03 Damages and Default Enforcement.
               -------------------------------

          A. In no event, and notwithstanding any other provision of this 
Agreement, shall Developer be entitled to any damages against the City upon 
lawful termination of this Agreement or a finding of invalidity of this 
Agreement.

          B. All remedies at law or in equity or in the City's regulations 
governing development agreements which are not inconsistent with the provisions 
of this Agreement are available to the parties to pursue in the event there is a
breach, except that City shall be entitled to assert all legal or equitable 
defenses or immunities that, except for this Agreement, would be available to 
City by operation of law.

          4.04 Periodic Review.
               ---------------

          A. City shall, at least every twelve (12) months during the term of 
this Agreement, review the extent of good faith compliance by Developer with the
terms of this Agreement. Pursuant to Government Code Section 65865.1, as 
amended, and Long Beach Municipal Code Section 21.29.070, Developer shall have 
the duty to demonstrate its good faith compliance with the terms of the 
Agreement at the periodic review.

          B. If Developer is found to be in compliance with the Agreement after 
annual review, City shall, upon written request 

                                    - 26 -
<PAGE>
 
by Developer, issue a Review Letter to Developer stating that based upon 
information known or made known to the City Council, the City Planning 
Commission and/or the City Planning Director, the Agreement remains in effect 
and Owner is not in default.

          C. City's failure to review at least annually Developer's compliance 
with the terms and conditions of this Agreement shall not constitute or be 
asserted by any party as a breach of the Agreement by Developer or City.

          D. If, as a result of such periodic review, the City finds and 
determines, on the basis of substantial evidence, that Developer or its 
successor-in-interest has not complied in good faith with the terms and 
conditions of the Agreement, the City may, subject to the provisions of 
Section 2.07B, modify this Development Agreement or terminate the Development
Agreement for cause.

          E. As a part of the periodic review prescribed in Subsection 4.04A, 
City's Director of Public Works will evaluate progress in implementation of 
the TMP and will prepare a report thereon for submission to the City Council. A
copy of the report will be forwarded to each member of any Assessment District
formed pursuant to the TMP, together with the date on which the report will be
presented to the Council.

          4.05 Assignment.
               ----------

          A. The rights and obligations of Developer under this Agreement may 
be transferred or assigned in whole or in part as provided in this Section 4.05,
provided that in no event, and notwithstanding any other provision of this
Section 4.05, shall this Agreement be transferred or assigned in whole or in
part as

                                    - 27 -
<PAGE>
 
to Parcel "A" until the provisions of Division 5 ("Assignment and Subletting" 
of that certain Lease of July 17, 1985 between City and Developer are fully 
complied with, and the transfer or assignment of this Agreement, in whole or in 
part, is to and only to the same party to whom transfer or assignment is 
authorized under that Lease, and, as to Parcel "B", shall not be transferred or 
assigned unless and until this Agreement is fully operative as to said Parcel 
"B" and, thereafter, shall only be transferred or assigned as a part of, and in 
the same manner as, provided in the long-term agreement relating to development 
of Parcel "B" between Developer and City through its Board of Water 
Commissioners.

          B. It is understood and agreed by the parties that the Property may be
sold or subdivided after the execution of this Agreement. One or more of such 
subdivided parcels may be sold, mortgaged, hypothecated, assigned or transferred
to persons for development by them in accordance with the provisions of this 
Agreement. Developer shall have the right to sell, mortgage, hypothecate, assign
or transfer this Agreement, and any and all of its rights, duties and 
obligations hereunder, to any person, partnership, joint venture, firm or 
corporation at any time during the term of this Agreement, provided that any 
such sale, mortgage, hypothecation, assignment or transfer must be pursuant to a
sale, assignment or other transfer of the interest of Developer in the Property,
or a portion thereof. In the event of any such sale, mortgage, hypothecation,
assignment or transfer, (a) Developer shall notify City of such event and the
name of the transferee, together with the corresponding

                                    - 28 -
<PAGE>
 
entitlements being transferred to such transferee, and (b) the Agreement between
Developer and such transferee shall provide that the transferee shall be liable 
for the performance of all obligations of Developer pursuant to this Agreement 
for any and all such portions of the Property sold or subdivided.  Such 
transferee shall notify City in writing that it shall be liable for the 
performance of such obligations, and upon the express written assumption of any 
or all of the obligations of Developer under this Agreement by such assignee, 
transferee shall, without any act of or concurrence by City, relieve Developer 
of its legal duty to perform said obligations under this Agreement with respect 
to the Site or portion thereof so transferred.

          C. Non-compliance by such transferee with the terms and conditions of
this Agreement shall be deemed a default hereunder.

          4.06   Relationship of Parties.
                 -----------------------

          It is understood that the contractual relationship between the parties
created hereunder is that Developer is an independent contractor and is not an 
agent of the City.  Neither party is acting as agent for the other.  None of the
terms or provisions herein shall create a partnership, joint venture or joint 
enterprise.  This Agreement shall not be construed to create or limit any third 
party beneficiary rights unless expressly otherwise provided.

          4.07   Mortgage Protection.
                 -------------------

          A.   Entering into or a breach of this Agreement shall not defeat, 
render invalid, diminish, or impair the lien of Mortgagees having a mortgage on 
any portion of the Property made

                                     -29-



<PAGE>
 
in good faith and for value, unless otherwise required by law or as set forth in
this Section 4.07.  No Mortgagee shall have an obligation or duty under this 
Agreement to perform Developer's obligations, or to guarantee such performance, 
prior to any foreclosure or deed in lieu thereof.

          B.   If the City receives timely notice from a Mortgagee requesting a 
copy of any notice of a default given to Developer under the terms of this 
Agreement, City shall provide a copy of that notice to the Mortgagee within ten 
(10) days of sending the notice of default to Developer.  The Mortgagee shall 
have the right, but not the obligation, for a period up to sixty (60) days after
the receipt of such notice from City to cure or remedy, or to commence to cure 
or remedy the default unless a further extension of time to cure is granted in 
writing by City.  If the default is of a nature which can only be remedied or 
cured by such Mortgagee upon obtaining possession, such Mortgagee shall seek to 
obtain possession with diligence through foreclosure, a receiver or otherwise, 
and shall thereafter remedy or cure the default or non-compliance within thirty 
(30) days after obtaining possession.  If any such default or non-compliance 
cannot, with diligence, be remedied or cured within such thirty- (30-) day 
period, then such Mortgagee shall have such additional time as may be reasonably
necessary to remedy or cure such default or non-compliance if such Mortgagee 
commences to cure during such thirty- (30-) day period, and thereafter 
diligently pursues and completes such cure.

          C.   Notwithstanding the foregoing provisions of Section 4.06 of this 
Agreement, if any Mortgagee is prohibited

                                     -30-

<PAGE>
 
from commencing or prosecuting foreclosure or other appropriate proceedings in 
the nature thereof by any process or injunction issued by any court or by reason
of any action by any court having jurisdiction of any bankruptcy or insolvency 
proceeding, the times specified in this Section for commencing or prosecuting 
foreclosure or other proceedings shall be extended for the period of 
the prohibition.

               D. Notwithstanding any provision of this Section 4.07, the 
burdens of this Agreement shall be binding upon, and the benefits of the
Agreement shall inure to, all successors-in-interest to the parties to this
Agreement, and nothing herein shall be construed to the contrary.

               4.08 Indemnification and Hold Harmless.
                    ---------------------------------

               A. Developer agrees to and shall protect, indemnify, defend and 
hold City, its offices, agents, employees, consultants, special counsel and
representatives harmless from liability: (1) for damages, just compensation,
restitution, judicial or equitable relief arising out of claims for personal
injury, including health, and claims for property damage which may arise from
the direct or indirect operations of the Developer or its contractors,
subconstructors, agents, employees or other persons acting on its behalf which
relates to the Project; and (2) from any claim that damages,just compensation,
restitution, judicial or equitable relief is due by reason of the terms of or
effects arising from this Agreement, except for any claim arising out of a
negligent or willful act or omission of City. Developer agrees to pay all costs
for the defense of the City and its officers, agents, employees, consultants,

                                    - 31 -
<PAGE>
 
special counsel and representatives regarding any action for damages, just 
compensation, restitution, judicial or equitable relief caused or alleged to 
have been caused by reason of Developer's actions in connection with the 
Project or any claims arising out of this Agreement, except for any claim 
arising out of a negligent or willful act or omission of City. City may make all
reasonable decisions with respect to its representation in any legal proceeding.

               B. In the event any person not a party to this Agreement shall 
institute any type of action against City with respect to this Agreement, City 
may, at its sole option, elect to tender the defense of such action to 
Developer, and Developer shall accept such a tender and shall protect, identify,
defend and hold harmless the City from all damages, costs and expenses incurred 
in the defense of such matter. In the event of such a tender and acceptance, 
City agrees that it shall fully cooperate with Developer in the defense of such 
matter.

               4.09 Notices.
                    -------

     All notices under this Agreement shall be deemed received upon personal 
delivery to, or two days after deposit, first class postage prepaid in, the 
U.S. Mail, addressed to, the following representatives of the party at the 
addresses indicated below:

               If to City:                 City of Long Beach
                                           333 West Ocean Boulevard
                                           Long Beach, California 90802

                                           Attention: Director of Planning
                                                      and Building

                                   - 32 -
<PAGE>
 
               If to Developer:      Kilroy Long Beach Associates
                                     2250 Imperial Highway
                                     El Segundo, California 90245

                                     Attention: Campbell Hugh Greenup

     Either party may change its address by giving notice in writing to the 
other party.

          4.10 Time of Essence.
               ---------------

     Time is of the essence for each provision of this Agreement of which time 
is an element.

          4.11 Entire Agreement.
               ----------------

     This written Agreement, including all exhibits as set forth in Section 
1.03,constitutes and embodies the entire understanding between the parties. It 
supersedes all other agreements, representations or undertakings, whether oral 
or written, that either party might allege to have existed prior to execution of
this Agreement. City and Developer specifically represent that they have, 
respectively, executed and entered into this Agreement solely on the basis of 
the terms and conditions set forth herein and they have relied on no other 
representations, provisions, inducements or understandings of any kind in doing 
so, nor did any such representations, promises, inducements or understandings 
made by or on behalf of City or Developer exist at the time of execution of this
Agreement.

               4.12 Modification.
                    ------------

     No modification, amendment or other change in this Agreement or any 
provision hereof shall be effective for any purpose unless specifically set 
forth in writing executed by duly authorized representatives of both parties and
referring 

                                    - 33 -
<PAGE>
 
expressly to this Section and in accordance with all applicable provisions of 
law.

               4.13 Force Majeure.
                    -------------

     Neither party shall be deemed to be in default where failure or delay in 
performance of any of its obligations under this Agreement is caused by floods, 
earthquakes, other Acts of God, fires, wars, riots or similar hostilities, 
strikes and other labor difficulties beyond such party's control, government 
regulations other than those of City, court actions (such as restraining orders 
or injunctions) or any other cause beyond such party's control. If any such 
events shall occur,the term of this Agreement and the time for performance by 
either party of any of its obligations hereunder shall be extended by the period
of time that such events prevented such performance provided that the term of 
this Agreement shall not be extended under any circumstances for more than five 
(5) years.

               4.14 Estoppel Certificate.
                    --------------------

     Either party may, at any time, and from time to time, deliver written 
notice to the other party requesting such party to certify in writing that, to 
the knowledge of the certifying party, (1) this Agreement is in full force and 
effect and a binding obligation of the parties, (2) this Agreement has not been 
amended or modified either orally or in writing and, if so amended, identifying 
the amendments and (3) the requesting party is not in default of the performance
of its obligations under this Agreement or, if in default, describing the nature
and amount of any such defaults. A party receiving a request hereunder shall 
execute and return such Certificate within 

                                    - 34 -
<PAGE>
 
thirty (30) days following the receipt thereof.

     City acknowledges that an Estoppel Certificate may be relied upon by 
transferees and mortgagees; provided, however, that whether or not the Estoppel 
Certificate is relied upon by assignees or other transferees or Developer, City 
shall not be bound by a Certificate if a default existed at the time of the 
annual review, but was concealed from or otherwise not known to the City.

               4.15 Attorney's Fees.
                    ---------------

     In any action to enforce the provisions of this Agreement, the prevailing 
party shall be entitled to recover its Attorney's fees from the other party.

               4.16. Waiver.
                     ------

     No waiver of any provision of this Agreement shall be effective unless it 
is in writing, executed by a duly authorized representative of the party against
whom enforcement of a waiver is sought and refers expressly to this Section. No 
waiver of any right or remedy in respect of any occurrence or event shall be 
deemed a waiver of any right or remedy in respect of any other occurrence or 
event.

               4.17 Successors and Assigns.
                    ----------------------

     The provisions of this Agreement shall be binding upon and inure to the 
benefit of the parties and their respective successors and assigns. Any 
successor-in-interest to City shall be subject to the provisions set forth in 
Government Code Sections 65865.4 and 65868.5.

               4.18 Governing Law and Consent to Jurisdiction.
                    -----------------------------------------

               A. This Agreement shall be interpreted, governed and 

                                    - 35 -

<PAGE>
 
construed under the laws of the State of California as if executed and performed
wholly within the State of California.

               B. Developer furthermore irrevocably consents and submits to the 
jurisdiction of the state and federal courts in the State of California as the 
exclusive jurisdiction and courts in which any action, suit or proceeding of 
any kind or nature may be brought against it or by it which is related to any
matter contained in this Agreement, and Developer hereby waives and agrees not
to assert by way of motion, defense or otherwise, in any such action, suit, or
proceedings, that it is not personally subject to the jurisdiction of any
such court, that any such court is an inconvenient forum or that venue in any 
such court is improper.

               C. Developer furthermore agrees to accept service of process in 
any matter relating to this Agreement in any place within the State of 
California where it or any of its officers, agents or attorneys may be found.

               4.19 Recordation.
                    -----------

     This Agreement shall be recorded immediately following its execution in the
Office of the Recorder of the County of Los Angeles, California.

     IN WITNESS WHEREOF, the parties have executed this


                                    - 36 -
<PAGE>
 
                         DEVELOPER'S ACKNOWLEDGEMENT 
STATE OF CALIFORNIA   )
                      )  ss.
COUNTY OF LOS ANGELES )

          On October 11, 1990, before me, the undersigned, a Notary Public in 
             ----------
and for said State, personally appeared John B. Kilroy, Jr. personally known to 
                                        -------------------
me or proved to me on the basis of satisfactory evidence to be the person who 
executed this instrument as President of Kilroy Industries, the corporation 
                            ---------
that executed this instrument as the general partner of Kilroy Long Beach 
Associates, a California Limited Partnership, the partnership that executed the 
within instrument, and acknowledged to me that such corporation executed the 
same as such partner and that said partnership executed the same.

[Seal]          WITNESS my hand and official seal.

[Seal of Nadine K. Kirk]               /s/ NADINE K. KIRK
                                       ----------------------------------
                                       Notary Public in and for said
                                       County and State


                                       CITY OF LONG BEACH, a municipal
                                       corporation of the State of
                                       California

                                       By:  [Signature]
                                          -------------------------------
                                          Assistant City Manager
                                                       
                                                       EXECUTED PURSUANT
                                                       TO SECTION 301 OF
                                                       THE CITY CHARTER.

          The foregoing Agreement is hereby approved as to form this 4th day of 
                                                                     ---
December, 1990.
- --------

                                       JOHN R. CALHOUN, City Attorney

                                       By:  [Signature]
                                          ---------------------------------
                                          Deputy
   

                                     -37-
<PAGE>
 
WHK/am
04/16/90
04/18/90
05/11/90
05/14/90
06/04/90
06/29/90
07/02/90
07/19/90
07/20/90
VERSION #2:
07/30/90
08/09/80
08/13/90
08/21/90
09/12/90
AG\53(E).DOC

                                     - 38 -
<PAGE>
 
                                                                       EXHIBIT A

 
                         LEGAL DESCRIPTION OF PROPERTY
                           SUBJECT TO THE AGREEMENT

                                  PARCEL "A"

                        (KILROY LONG BEACH ASSOCIATES)

PARCELS 1 THROUGH 10, INCLUSIVE, OF PARCEL MAP NO. 16960, IN THE CITY OF LONG 
BEACH, COUNTY OF LOS ANGELES, STATE OF CALIFORNIA, AS PER MAP RECORDED IN BOOK 
208, PAGES 92 THROUGH 100 INCLUSIVE OF PARCEL MAPS, IN THE OFFICE OF THE COUNTY 
RECORDER OF SAID COUNTY.

<PAGE>
 
                         LEGAL DESCRIPTION OF PROPERTY
                           SUBJECT TO THE AGREEMENT

                                  PARCEL "B"

                        (KILROY LONG BEACH ASSOCIATES)

THAT PORTION OF RANCHO LOS CERRITOS IN THE CITY OF LONG BEACH, COUNTY OF LOS 
ANGELES, STATE OF CALIFORNIA, AS PER MAP RECORDED IN BOOK 2, PAGES 202 THROUGH 
205 OF PATENTS IN THE OFFICE OF SAID COUNTY RECORDER, DESCRIBED AS FOLLOWS:

BEGINNING AT THE MOST SOUTHWESTERLY CORNER OF PARCEL 9 OF PARCEL MAP NO. 16960, 
IN SAID CITY, AS PER MAP RECORDED IN BOOK 208, PAGES 92 THROUGH 100, INCLUSIVE, 
OF SAID PARCEL MAP; THENCE FOLLOWING THE BOUNDARY LINE OF PARCELS 9 AND 10 OF 
SAID PARCEL MAP BY THE FOLLOWING SIX COURSES: NORTH 9 (DEGREES) 45' 28" EAST 
232.12 FEET; THENCE SOUTH 89 (DEGREES) 53' 01" EAST 233.60 FEET; THENCE NORTH
53 (DEGREES) 04' 54" EAST 181.74 FEET; THENCE NORTH 0 (DEGREES) 16' 54" EAST
305.50 FEET; THENCE SOUTH 89 (DEGREES) 58' 42" WEST 58.81 FEET; THENCE NORTH 0 
(DEGREES) 08' 48" EAST 426.88 FEET TO AN INTERSECTION WITH THE SOUTHERLY LINE OF
SPRING STREET, 100 FEET WIDE, AS SHOWN ON RECORD OF SURVEY MAP FILED IN BOOK 85,
PAGE 19, RECORDS OF SAID COUNTY; SAID INTERSECTION BEING ON A CURVE CONCAVE 
SOUTHERLY HAVING A RADIUS OF 950.00 FEET AND THROUGH WHICH A RADIAL LINE TO SAID
CURVE BEARS SOUTH 6 (DEGREES) 22' 25" WEST; THENCE WESTERLY 103.88 FEET ALONG 
SAID CURVE THROUGH A CENTRAL ANGLE OF 6 (DEGREES) 15' 54"; THENCE WESTERLY ALONG
SAID SOUTHERLY LINE NORTH 89 (DEGREES) 52' 59" WEST 620.52 FEET TO A POINT 
DISTANT EASTERLY THEREON 20.00 FEET FROM THE INTERSECTION OF SAID SOUTHERLY LINE
OF SPRING STREET WITH THE EASTERLY LINE OF REDONDO AVENUE, 90 FEET WIDE, AS 
SHOWN ON TRACT NO. 27805, AS PER MAP RECORDED IN BOOK 712 PAGES 95 THROUGH 97, 
INCLUSIVE, OF MAPS, RECORDS OF SAID COUNTY; THENCE SOUTH 45 (DEGREES) 06' 46" 
WEST IN A DIRECT LINE, 28.28 FEET TO A POINT IN THE EASTERLY LINE OF SAID 
REDONDO AVENUE, DISTANT SOUTHERLY THEREON 20.00 FEET FROM SAID INTERSECTION; 
THENCE SOUTHERLY ALONG SAID EASTERLY LINE SOUTH 0 (DEGREES) 06' 32" WEST 958.27 
FEET TO A POINT DISTANT NORTHERLY THEREON 7.94 FEET FROM THE INTERSECTION OF 
SAID EASTERLY LINE OF REDONDO AVENUE WITH THE NORTHERLY LINE OF KILROY AIRPORT
WAY, VARIES IN WIDTH, AS SHOWN ON SAID PARCEL MAP NO. 16960; THENCE SOUTH 44
(DEGREES) 53' 28" EAST IN A DIRECT LINE 11.24 FEET TO A POINT IN THE NORTHERLY
LINE OF SAID KILROY AIRPORT WAY, DISTANT EASTERLY 7.94 FEET FROM LAST MENTIONED
INTERSECTION; THENCE FOLLOWING THE NORTHERLY LINE OF SAID KILROY AIRPORT WAY BY
THE FOLLOWING FIVE COURSES; SOUTH 89 (DEGREES) 53' 28" EAST 62.06 FEET TO A
TANGENT CURVE CONCAVE SOUTHERLY HAVING A RADIUS OF 296.00 FEET; THENCE SOUTH-
EASTERLY 129.15 FEET ALONG SAID CURVE THROUGH A CENTRAL ANGLE OF 25 (DEGREES)
00' 00"; THENCE SOUTH 64 (DEGREES) 53' 28" EAST 57.87 FEET TO A TANGENT CURVE
CONCAVE NORTHEASTERLY HAVING A RADIUS OF 354.00 FEET; THENCE SOUTHEASTERLY 82.99
FEET ALONG SAID CURVE THROUGH A CENTRAL ANGLE OF 13 (DEGREES) 25' 54"; THENCE
SOUTH 78 (DEGREES) 19' 22" EAST 59.24 FEET TO THE POINT OF BEGINNING.
 



























<PAGE>
 
                                  Parcel "B"
                               Legal Description
 
                                    [MAP OF
                       A PORTION OF RANCHO LOS CERRITOS,
                          IN THE CITY OF LONG BEACH,
                            COUNTY OF LOS ANGELES,
                             STATE OF CALIFORNIA]

<PAGE>
 
                                                                       EXHIBIT B

 
                               [MAP OF BOUNDARY
                     LONG BEACH AIRPORT TRAFFIC STUDY AREA
                    CITY OF LONG BEACH, STATE OF CALIFORNIA]

<PAGE>
 
                              LIST OF ROADWAY AND
                           INTERSECTION IMPROVEMENTS

                                  (PHASE "I")

                         ASSESSMENT DISTRICT NO. 90-2

<TABLE> 
<CAPTION> 
Project                           Description
- -------                           -----------
<S>                  <C> 
   1                  Cherry Avenue and Carson Street
   2                  Cherry Avenue and 36th Street
   3                  Cherry Avenue and Wardlow Road
   4                  Cherry Avenue and Spring Street
   5                  Temple Street and Spring Street
   6                  Redondo Street and Spring Street
   6A                 Traffic Signals
   7                  Willow Avenue and Redondo Street
   7A                 Northeast Corner
   8                  Lakewood Boulevard and Carson Street
   8A                 Southeast Corner
   9                  Lakewood Boulevard and Wardlow Road
  10                  Lakewood Boulevard and Conant Street
  11                  Lakewood/Spring
  12                  Lakewood Boulevard and Willow Street
  13                  Clark Avenue and Carson Street
  14                  Clark Avenue and Conant Street
  15                  Clark Avenue and Wardlow Avenue
  16                  Clark Avenue and Spring Street
  17                  Clark Avenue and Willow Avenue
  18                  Carson Street and Paramount Boulevard
  19                  Cherry Avenue and Bixby Avenue
</TABLE> 
                                  Exhibit "C"

<PAGE>
 
                           Exhibits D - I omitted.


<PAGE>
 
                                                                   EXHIBIT 10.18

                                                                              

RECORDING REQUESTED BY:  ) 
                         )
THE CITY OF LONG BEACH   )
333 WEST OCEAN BOULEVARD )
LONG BEACH, CA 90802     )
                         )
AND                      )
                         )
WHEN RECORDED MAIL TO:   )
                         )
THE CITY OF LONG BEACH   )
CITY ATTORNEY'S OFFICE   )
333 WEST OCEAN BOULEVARD )
LONG BEACH, CA 90802     )

- --------------------------------------------------------------------------------
                       (Space above for Recorder's Use)

                               AMENDMENT NO. 1 TO
                               ------------------

                             DEVELOPMENT AGREEMENT
                             ---------------------
                         (Airport Traffic Study Area)


                         KILROY LONG BEACH ASSOCIATES

     The following AMENDMENT TO DEVELOPMENT AGREEMENT is made and entered into 
as of this 17th day of April, 1992, pursuant to Ordinance No. C-6985 adopted by 
the City Council of the City of Long Beach on the 24th day of March, 1992, by 
and between the CITY OF LONG BEACH, a municipal corporation of the State of 
California ("City"), and KILROY LONG BEACH ASSOCIATES, a California limited 
partnership ("Developer").

     WHEREAS, on October 5, 1990, a Development Agreement was entered into 
between City and Developer pursuant to City Ordinance No. C-6788; and

     WHEREAS, the Development Agreement provided that it would terminate as to 
parcel "B" in the event that certain conditions were not satisfied within the 
time set forth therein; and

     WHEREAS, the parties hereto now desire to amend the Development Agreement 
to extend the time for satisfaction of the conditions and to clarify certain 
other provisions; and

     WHEREAS, notice has been given and a public hearing held on March 17, 1992
in accordance with Section 65868 of the Government Code, and Ordinance No. 
C-6985 was thereafter adopted approving this Amendment;

     NOW, THEREFORE, the Development Agreement between the parties hereto is 
hereby amended as follows:

     1.   All references to the year "1992" in Subsections 2.01B. and 2.06B. are
hereby changed to read "1994."

     2.   The phrase "at least twenty (20) years" in Subsections

                                    1 of 2
<PAGE>
 
2.01.B.2 and 2.06B. is hereby deleted and in its place is inserted the phrase 
"at least equal to the remaining term of this Agreement on the date of 
execution."

     3. The parties agree that this amendment does not affect, amend or change 
the Effective Date of the Development Agreement as set forth therein.

     IN WITNESS WHEREOF, the parties hereto have caused these presents to be
duly executed in duplicate with all the formalities required by law on the
respective dates set forth opposit their signatures.

                  "CITY"

                  CITY OF LONG BEACH, a municipal
                  corporation

4/17 , 1992       By [Signature]              EXECUTED PURSUANT     
- -----                ----------------------------------
                     ASSISTANT City Manager   TO SECTION 301 OF
                                              THE CITY CHARTER.

                  "DEVELOPER"

                  KILROY LONG BEACH ASSOCIATES, a
                  California limited partnership

                  By: KILROY INDUSTRIES, a California
                      Corporation, General Partner

April 14, 1992    By /s/ Marshall L. McDaniel
- --------             ----------------------------------
                         MARSHALL L. McDANIEL
                     Executive Vice President & Secretary

     The foregoing AMENDMENT TO DEVELOPMENT AGREEMENT is hereby approved as to 
form the 16th day of April, 1992.

                  JOHN C. CALHOUN, City Attorney



                  By  [Signature]
                     ----------------------------------  
                      Assistant

                                    2 of 2
<PAGE>
 
                          DEVELOPER'S ACKNOWLEDGMENT
                          --------------------------

STATE OF CALIFORNIA     )
                        ) ss.
COUNTY OF LOS ANGELES   )

     On April 13, 1992, before me, the undersigned, a Notary Public in and for 
said State, personally appeared MARSHALL L. McDANIEL, personally known to me or 
proved to me on the basis of satisfactory evidence to be the person who executed
this instrument as Executive Vice President and Secretary of KILROY INDUSTRIES, 
the corporation that executed this instrument as the general partner of KILROY 
LONG BEACH ASSOCIATES, a California Limited Partnership, the partnership that 
executed the within instrument, and acknowledged to me that such corporation 
executed the same as such partner and that said partnership executed the 
same.

     WITNESS my hand and official seal.

[Seal]

[Seal appears here]          
                                                   /s/ Bonnie Dietz
                                                 ------------------------------
                                                 Notary Public in and for said
                                                 County and State


 

<PAGE>
 
                                                                   EXHIBIT 10.21



                          PURCHASE AND SALE AGREEMENT
                                      AND
                           JOINT ESCROW INSTRUCTIONS



                           WESTLAKE PLAZA PARTNERS,
                       A CALIFORNIA LIMITED PARTNERSHIP

                                  as "Seller"



                              KILROY INDUSTRIES,
                           A CALIFORNIA CORPORATION

                                  as "Buyer"
<PAGE>
 
                                     INDEX
                                     -----

<TABLE>
<CAPTION>

(S)    CAPTION                                                            PAGE
- ---    -------                                                            ----
<S>    <C>                                                                <C>
1.       SALE OF THE PROPERTY.............................................  1

2.       ESCROW...........................................................  2

3.       DEPOSITS AND PURCHASE PRICE......................................  2

4.       CONDITIONS TO CLOSING............................................  3

5.       CLOSING OF ESCROW................................................  6

6.       DEFAULTS AND REMEDIES............................................ 11

7.       REPRESENTATIONS AND WARRANTIES................................... 12

8.       OPERATION OF THE PROPERTY BEFORE CLOSING......................... 16

9.       POST-CLOSING MATTERS............................................. 17

10.      BROKERS.......................................................... 17

11.      MISCELLANEOUS PROVISIONS......................................... 18
</TABLE>


         EXHIBITS
         --------

A        Legal description of Land

B        Map or depiction of Land

C        Escrow General Provisions

D        Grant Deed and D.T.T. Statement

E        Assignment of Leases

F        General Assignment

G        Bill of Sale

H        Rent Roll

I        Tenant Estoppel Certificate

J        Landlord Estoppel Certificate

K        Seller's Notice to Tenants


                                       i
<PAGE>
 
                          PURCHASE AND SALE AGREEMENT
                          ---------------------------
                         AND JOINT ESCROW INSTRUCTIONS
                         -----------------------------


To:  Continental Lawyers Title Insurance         Escrow No. 21723 SL
     Company                                     ("Escrow")
     200 East Carrillo, Suite 100                Attn: Susan Lowe
     Santa Barbara, CA  93101                    Phone (805) 965-7091
                                                 Fax (805) 568-3880
 


          This Purchase and Sale Agreement and Joint Escrow Instructions
("Agreement") is entered into effective as of June 6, 1996 between WESTLAKE
PLAZA PARTNERS, a California limited partnership ("Seller"), and KILROY
INDUSTRIES, a California corporation ("Buyer"), as follows:

1.   SALE OF THE PROPERTY
     --------------------

     Buyer agrees to purchase from Seller, and Seller agrees to sell to Buyer,
the following described real and personal property (collectively, the
"Property"):

     1.1    LAND.  That real property located in the City of Thousand Oaks,
            ----                                                           
County of Los Angeles, State of California, consisting of approximately 1.194
acres as legally described on Exhibit "A" and as depicted on Exhibit "B" hereto
                              -----------                    -----------       
and the Survey described in Section 4.1 below, but including all rights,
privileges, easements, rights of way and other appurtenances inuring to the
benefit of the land (collectively, the "Land").

     1.2    IMPROVEMENTS.  All buildings, improvements and fixtures located on
            ------------                                                      
the Land, and all personal property owned by Seller located on the Land and used
in connection therewith including but not limited to approximately 83,272 square
feet of office building facilities and all of Seller's interest in any
apparatus, equipment, machinery, articles, appliances, heating and air
conditioning, sprinkler, plumbing, electric power or lighting, ventilating and
cooling systems and facilities used to provide any utility services,
refrigeration, ventilation, trash or garbage collection or disposal, recreation
or other services on the Land with each of their respective appurtenant
furnaces, boilers, radiators, pipes, wiring and other apparatus, equipment and
fixtures, partitions, fire preventive and extinguishing systems and equipment;
and surface parking for at least 325 automobiles (collectively, the
"Improvements"). The Land and Improvements are herein called the Project;

     1.3    PLANS AND PERMITS.  To the extent reasonably available to Seller,
            -----------------                                                
any blueprints, plans and specifications (including final and complete "as
builts"), maps, surveys, drawings, guaranties, warranties, utility and other
entitlements, licenses, permits, certificates of occupancy, rights or approvals
from any private or public parties needed for access or utilities to the Project
or any other rights, interests or privileges owned by Seller in any way related
to the Land (collectively, the "Plans and Permits");
<PAGE>
 
     1.4    LEASES.  All of Seller's interest as lessor in all leases and
            ------                                                       
licenses, and all rental, occupancy and concession agreements (collectively, the
"Leases") respecting all tenants, licensees, concessionaires, subtenants,
occupants and other users of all or any portion of the Project (collectively,
the "Tenants"), as listed, or to be listed pursuant to Section 4.4, on the form
of rent roll attached as Exhibit "H" hereto ("Rent Roll") and containing the
                         -----------                                        
amenities and amount of square footage shown thereon;

     1.5    TANGIBLE PERSONAL PROPERTY.  All items of equipment, furnishings,
            --------------------------                                       
fixtures, supplies and other tangible personal property, if any (the "Tangible
Personal Property"); and

     1.6    INTANGIBLE PROPERTY:  All of Seller's interest in any intangible
            -------------------                                             
personal property now or in the future owned by Seller and used in connection
with the Project and not otherwise described above, including but not limited to
any warranties, guaranties, service agreements or other contract rights to the
extent approved by Buyer under this Agreement, and the right to use the name
"WESTLAKE PLAZA CENTER" or any other trade name now used by Seller in connection
with the Project (collectively, the "Intangible Property").

2.   ESCROW
     ------

     2.1    GENERAL INSTRUCTIONS.  Continental Lawyers Title Insurance Company
            --------------------                                              
is hereby designated as escrow holder (the "Escrow Holder"). Escrow Holder's
general conditions or provisions are attached hereto as Exhibit "C". If there
                                                        -----------           
is any inconsistency between Exhibit "C" and any of the provisions of this
                             -----------                                  
Agreement, the provisions of this Agreement shall control. Buyer and Seller
shall each execute and deliver such further escrow instructions or other
instruments as may be reasonably requested by the other party or by Escrow
Holder from time to time, so long as the same are consistent with this
Agreement. Escrow Holder shall not be concerned, liable or responsible for any
representations, warranties or indemnities as between Buyer and Seller or for
compliance with any of the following subsections: 1.2 through 1.6, 4.2 through
4.6 (except only as to applicable time periods), 7 (except 7.3.7), 8 and 9.]

     2.2    TAX REPORTING PERSON.  For purposes of complying with Internal
            --------------------                                          
Revenue Code Section 6045(e), as amended effective January 1, 1991, Escrow
Holder is hereby designated as the "person responsible" and the "reporting
person" for purposes of filing any information returns with the Internal Revenue
Service concerning this transaction, as required by law.

     2.3    OPENING OF ESCROW.  Escrow shall be deemed open when the Deposit
            -----------------                                               
(defined below) and this Agreement, fully signed by all parties either together
or in counterparts, are delivered to Escrow Holder ("Opening of Escrow"), which
shall occur not later than three (3) business days after mutual execution of
this Agreement. Escrow Holder shall immediately notify Buyer, Seller and their
respective attorneys of the official date of Opening of Escrow.

3.   DEPOSITS AND PURCHASE PRICE
     ---------------------------

     3.1    PURCHASE PRICE.  The purchase price for the Property shall be
            --------------                                               
Thirteen Million Fifty Thousand Dollars ($13,050,000) (the "Purchase Price") to
be paid as follows:

                                       2
<PAGE>
 
            3.1.1   DEPOSIT.  Concurrently with delivery to Escrow Holder of a 
                    -------   
copy of this Agreement signed by Buyer and Seller, Buyer shall deliver to Escrow
Holder the sum of Two Hundred Fifty Thousand Dollars ($250,000) (the "Deposit").
The Deposit shall be returned to Buyer (i) if this Escrow is terminated by Buyer
prior to the expiration of the Contingency Period (defined below), as permitted
herein; or (ii) if this Escrow does not close for any reason other than Buyer's
default.

            3.1.2   [INTENTIONALLY OMITTED.]

            3.1.3   DISPOSITION OF DEPOSIT.  Escrow Holder shall hold the 
                    ----------------------   
Deposit in one or more interest-bearing accounts as required in order to be
fully insured by the Federal Deposit Insurance Corporation, as selected by Buyer
and reasonably satisfactory to Seller pursuant to a funds investment form
provided by Escrow Holder. All interest earned on any such Deposit shall not
constitute part of the Deposit and shall accrue to Buyer's benefit in each of
the events set forth in this section. Such Deposit retained by Escrow Holder
shall be (i) applied against the Purchase Price if Escrow closes under this
Agreement, or (ii) returned and paid to Buyer in full if Escrow does not close
for any reason other than Buyer's default, or (iii) be paid to Seller as
Liquidated Damages under Section 6.3 below if this Escrow fails to close under
the provisions of this Agreement as a result of Buyer's default.

            3.1.4   EXISTING DEBT.  The Property is currently encumbered by a
                    -------------                                           
deed of trust securing repayment of a note (the "Note"), the current unpaid
balance of which is approximately Seven Million Five Hundred Ninety-Three
Thousand Dollars ($7,593,000)). Buyer, in its sole and absolute discretion, may
elect during the Contingency Period to either pay off the Note through the
Escrow or assume the Note. Buyer shall submit an application for assumption of
the Note not later than June 12,1996. If Buyer elects to assume the Note, such
assumption shall be subject to Buyer's approval of the terms of the Note and any
conditions of assumption imposed by the holder of the Note. In either event, the
amount paid off or assumed by Buyer shall be credited against the Purchase Price
and shall reduce the amount of the proceeds of the Escrow payable to Seller.
Buyer shall be responsible for paying any prepayment penalty.

            3.1.5   CLOSING FUNDS.  At least one (1) business day before Close
                    -------------   
of Escrow, Escrow Holder shall calculate and Buyer shall deposit into Escrow an
amount of funds (the "Closing Funds") which, when added to the Deposit and
accrued interest, shall equal the Purchase Price plus any other sums payable by
Buyer hereunder. If Buyer elects to pay off the Note, Buyer shall also pay into
the Escrow the amounts necessary to pay off the Note.

4.   CONDITIONS TO CLOSING
     ---------------------

     Buyer's obligation to purchase the Property is subject to each of the
following conditions (the "Conditions Precedent"), which Buyer in each case may
approve, disapprove or waive in a writing delivered to Seller and Escrow Holder
at any time up to and including June 7, 1996, except to the limited extent set
forth in the following subsections of this Section 4 (the "Contingency Period").
Buyer's failure to disapprove in writing any such item within the Contingency
Period therefor shall be deemed to constitute approval thereof; provided, that

                                       3
<PAGE>
 
Buyer's failure to give notice to Seller and/or Escrow Holder within the
Contingency Period (as it may be extended to the limited extent set forth
herein), affirmatively approving this transaction as a whole and electing to go
forward towards Closing, shall be deemed to constitute automatic notice of
Buyer's disapproval and termination of this Agreement as provided in Section
4.10 below. Buyer shall use its reasonable efforts to complete its reviews, and
in no event shall the Contingency Period be extended beyond July 3, 1996,
pursuant to the following subsections which provide for extensions.

     4.1    TITLE AND SURVEY.  Seller has provided to Buyer for Buyer's approval
            ----------------                                                    
copies of the following ("Title Documents"): (i) a current preliminary title
report or commitment covering the Project (the "Title Report") prepared by
Continental Lawyers Title Insurance Company (the "Title Company"), (ii) a
depiction on the Survey (described below), or on a separate plat or site plan
prepared by Title Company, showing all easements then existing against the
Property and all other exceptions of record, (iii) legible copies from Title
Company of all documents referred to in the Title Report, and (iv) all UCC
filings against Seller and the Land or any portion thereof. Seller has delivered
to Buyer a survey of the Project dated [June 2, 1994] (the "Survey"). Buyer may
order at its expense an updated survey (the "Updated Survey") at any time prior
to June 12, 1996, and Buyer will have five (5) business days following receipt
of the Updated Survey within which to approve or disapprove any variance from
the Survey which may be disclosed by the Updated Survey. Seller shall cause all
monetary liens and encumbrances secured by the Property to be fully discharged
and reconveyed at or before the Closing except to the extent Buyer elects to
assume the Note.

     4.2    PROPERTY DOCUMENTS.  Seller has provided Buyer outside of Escrow,
            ------------------                                               
for Buyer's approval, with copies of all Plans and Permits and all of the
following documents relating to the Property which are reasonably available to
Seller (collectively, the "Property Documents"): (i) any soils or toxic
materials reports, architectural reports, seismic reports, engineering tests,
environmental or geological studies and similar data pertaining to any portion
of the Property; (ii) the most recent property tax bills, notices of assessments
and any petitions, appeals or related documents; (iii) any other notices,
claims, complaints, litigation, actions or other legal proceedings involving any
governmental authority or private party; (iv) any contracts, licenses or other
agreements affecting the ownership, operation, maintenance, repair, improvement
and/or development of the Property; (v) all Leases and any related assignments
or amendments; (vi) copies of the past three (3) years detailed operating and
financial statements for the Property, whether audited or unaudited, prepared by
or for Seller and certified by Seller; and (vii) copies of any financial
statements in the possession of Seller showing the financial condition and
operations of each Tenant.

     4.3    INSPECTION AND INDEMNITY.  Upon executing this Agreement, Buyer and
            ------------------------                                           
its representatives (including any architects, engineers and consultants), at
Buyer's sole cost and expense, shall have the right to inspect the Property and
all internal reports, studies or other documents in Seller's files which were
not provided to Buyer as part of Property Documents, and to make such surveys
and conduct such soils, engineering, environmental, hazardous substance, noise,
pollution, seismic or other physical test, study or investigation as Buyer may
require. Buyer shall obtain Seller's oral consent, which shall not be
unreasonably withheld or delayed, at least twenty-four hours prior to any entry
upon the Project. Any delays in Buyer's

                                       4
<PAGE>
 
diligence resulting from Seller's withholding or delaying Seller's consent shall
extend the Contingency Period for a period equal to the aggregate number of days
of such delay. Any such tests, studies or investigations shall be ordered by
Buyer not later than June 12, 1996, and Buyer shall have five (5) business days
following receipt of the reports of such tests, studies or investigations within
which to approve or disapprove such reports. Upon completion of any such work,
Buyer shall promptly restore the Land to at least as good condition as existed
immediately prior to the work. Buyer hereby agrees to indemnify and hold Seller
harmless against any claim, liability, loss, cost, action, damage, suit, legal
or administrative proceeding, expense or fees, including but not limited to
reasonable attorneys' fees (herein collectively, "Liabilities"), which Seller
may sustain or incur by reason of any such inspection or test.

     4.4    FINALIZATION OF RENT ROLL AND EXHIBITS.  Seller has provided Buyer
            --------------------------------------                            
with a complete and current Rent Roll, using the form of Exhibit "H" hereto or
                                                         -----------          
containing at least that information requested therein, such Rent Roll to be
updated to Buyer's reasonable satisfaction as a condition to Closing pursuant to
Section 5.2.6. Within the Contingency Period, Seller shall furnish Buyer with
all information necessary to prepare or finalize all other schedules and
exhibits attached hereto or otherwise agreeable to the parties.

     4.5    FEASIBILITY; GOVERNMENTAL PERMITS.  Buyer may satisfy itself with
            ---------------------------------                                
all applicable governmental authorities or otherwise as to the feasibility of
owning, developing, operating, leasing and marketing the Property and that the
Property complies, and Buyer's intended use, development and operation will
comply, with all applicable zoning, land use, building and other state, local
and federal laws, ordinances, regulations, licenses, permits or authorizations
(collectively, "Laws"), and that Buyer can obtain all necessary governmental
permits or approvals for such use, development or operation. Buyer may also
apply for and seek to obtain any additional governmental permits or approvals
respecting the Property for its anticipated use and development. Prior to the
Closing, Buyer shall submit to Seller, for its files and information only,
copies of any applications, proposals, plans, requests or other documents to any
governmental agency respecting any further permits or approvals applied for or
obtained by Buyer hereunder prior to the Closing.

     4.6    EXTENSION OF CONTINGENCY PERIOD.  If, prior to expiration of the
            -------------------------------                                 
Contingency Period, Buyer discovers a matter which could, in Buyer's reasonable
judgment, materially and adversely affect the Property, Buyer may extend the
Contingency Period as to such matter for a period of not more than five (5)
business days by giving written notice of such extension to Seller in the manner
set forth in Section 11.3 hereof.

     4.7    Condition of Improvements.  As of the Closing Date, the Improvements
            -------------------------
shall be in good operating condition (subject to normal wear and tear) and their
use and operation shall be in full compliance with all applicable environmental
and other Laws.

     4.8    SELLER'S CURE RIGHTS.  If Buyer disapproves any Condition Precedent
            --------------------                                               
or item to be received or satisfied thereunder during the Contingency Period,
Buyer may indicate in writing to Seller which of the objectionable items, if
any, Buyer in its sole and absolute discretion considers to be reasonably
curable. Seller shall have ten (10) days following receipt

                                       5
<PAGE>
 
of any such notice from Buyer in which to investigate each disapproved but
curable item and to notify Buyer and Escrow Holder in writing that Seller
either:

            4.8.1   has cured or will cure the disapproved but curable item
prior to the Closing Date; or

            4.8.2   is unable to cure the same.

     4.9    BUYER'S ELECTION.  If Seller notifies Buyer and Escrow Holder of
            ----------------                                                
Seller's inability to cure a disapproved but curable item, Buyer shall have ten
(10) days after receipt of Seller's notice to notify Seller and Escrow Holder in
writing of either:

            4.9.1   Buyer's waiver of its prior objection to the item and
decision to proceed to purchase the Property; or

            4.9.2   Buyer's election to terminate Escrow and this Agreement.

     4.10   RIGHTS UPON TERMINATION.  If Buyer terminates Escrow and this
            -----------------------                                      
Agreement before the end of the Contingency Period, either because (A) Buyer
does not notify Seller and Escrow Holder by the end of the Contingency Period
that Buyer has approved going forward with the sale transaction as a whole, 
(B) Buyer in its sole discretion deems an objectionable Condition Precedent not
to be curable, or (C) Seller does not elect to cure the same as provided in
Section 4.8 above, then (i) the Deposit and any interest accrued thereon shall
be returned and paid to Buyer, (ii) all instruments shall be returned to the
party depositing the same, (iii) Buyer and Seller each shall pay one-half of all
Escrow and title cancellation charges, and (iv) thereafter neither party shall
have any further rights, obligations or liabilities whatsoever to the other
party concerning the Property or under this Agreement except as provided in
Sections 4.3 and 10.

     4.11   SELLER'S FAILURE.  If Seller has elected to cure but fails or is
            ----------------                                                
unable to cure any disapproved matters on or before the last business day before
Close of Escrow, then Buyer may elect either: (i) to waive the disapproved
matters Seller has failed to cure and proceed to close Escrow, (ii) to terminate
this Agreement as provided below and to reserve rights against Seller if Seller
failed to use reasonable efforts in good faith to accomplish such cure, or 
(iii) to extend the Closing Date by up to 30 days if the uncured matter is
reasonably curable within such period and Seller has elected to cure as provided
in Section 4.8; or (iv) to exercise Buyer's rights and remedies under Section
6.4.

5.   CLOSING OF ESCROW
     -----------------

     5.1    CLOSING DATE.  Escrow shall close on or before the earlier of July
            ------------                                                      
31, 1996 or such earlier date as may be mutually agreed upon by Seller and
Buyer. Once determined, Escrow Holder shall confirm to Buyer and Seller, in
writing, the exact Closing Date. The terms "Close of Escrow", "Closing Date"
and/or "Closing" are used in this Agreement to mean the time and date the Grant
Deed is recorded in the Office of the Recorder of the County in which the Land
is located.

                                       6
<PAGE>
 
     5.2    DEPOSITS BY SELLER.  On or before the last business day before the
            ------------------                                                
Close of Escrow, Seller shall deliver to Escrow Holder the items described
below; provided, that Escrow need not be concerned with the form or content but
       --------                                                                
only with the manual delivery of all of the following (other than items 5.2.1
and 5.2.2):

            5.2.1   GRANT DEED.  A duly executed and acknowledged grant deed
                    ----------                                              
conveying to Buyer good and marketable title to the Land and Improvements, in
the form of attached Exhibit "D" (the "Grant Deed"), free and clear of all
                     -----------                                          
encumbrances or other items except as shown on the Title Policy described below.

            5.2.2   ASSIGNMENT OF LEASES.  A recordable assignment of the 
                    --------------------   
Leases to Buyer, properly executed and acknowledged by Seller, in the form
attached hereto as Exhibit "E" (the "Assignment of Leases";
                   -----------                             

            5.2.3   GENERAL ASSIGNMENT.  A general assignment, properly signed
                    ------------------   
by Seller and in the form of attached Exhibit "F", conveying to Buyer Seller's
                                      -----------                             
interest in any contract or other Intangible Property described in Section 1.6
(the "General Assignment");

            5.2.4   BILL OF SALE.  A Bill of Sale in the form of attached 
                    ------------                                          
Exhibit "G" signed by Seller and conveying to Buyer the Tangible Personal
- -----------
Property described in Section 1.5;

            5.2.5   ORIGINAL DOCUMENTS.  To the extent not previously delivered
                    ------------------   
to Buyer, originals of the Leases and other contracts to be assumed by Buyer
affecting the Property, the Plans and Permits, and any claims or notices of any
kind from any governmental authority in Seller's possession relating to the
Property, one complete set of as-built plans and specifications for the
Improvements, and one final and complete set of working drawings covering all
tenant improvements not part of the "as-builts" so provided;

            5.2.6   RENT ROLL.  The Rent Roll attached hereto as Exhibit "H", 
                    ---------                                    ----------- 
to be updated and certified to Buyer and Escrow Holder by Seller within not more
than five (5) business days before Closing as true and correct through and as of
the Closing Date;

            5.2.7   ESTOPPEL CERTIFICATES.  Original signed copies of estoppel
                    ---------------------                                     
certificates obtained by Seller from all Tenants, to be substantially in the
form of the sample attached hereto as Exhibit "I" (the "Estoppel Certificates")
                                      -----------                              
and dated to the extent reasonably possible not less than twenty (20) days prior
to the Closing Date, unless waived by Buyer as to any particular Tenant.  Seller
shall use reasonable efforts to obtain for Buyer's benefit Estoppel Certificates
from all Tenants prior to Close of Escrow, and shall certify the correctness of
all Estoppel Certificates as of the Closing Date.  As to each Tenant which fails
to provide an Estoppel Certificate containing all information set forth on
Exhibit "I", however, Seller shall execute and deliver its Seller's Estoppel
- -----------                                                                 
Certificate using the form attached hereto as Exhibit "J" containing Seller's
                                              -----------                    
representations and warranties as landlord and which shall survive as to each
such Tenant until a Tenant Estoppel Certificate is obtained from that Tenant.
If Seller despite reasonable efforts is unable to deliver to Buyer, prior to the
Closing, Estoppel Certificates from all Tenants occupying the leased building
space, then Buyer may terminate this Agreement and Escrow Holder shall act
according to the procedures set forth in Section 4.10.  If a Tenant

                                       7
<PAGE>
 
refuses to provide an estoppel certificate, Buyer, in its reasonable discretion,
following consultation with Seller, may elect to waive receipt of such estoppel
certificate if Buyer determines that the reasons such Tenant refused to deliver
such estoppel certificate are not material. The content of each such Estoppel
Certificate must be consistent with the Rent Roll and other representations and
warranties of Seller hereunder;

          5.2.8   KEYS.  Keys and combinations to all locks located on the
                  ----   
Improvements, but delivered outside of Escrow and without involving Escrow
Holder;

          5.2.9   NO UCC FILINGS.  Certificates from the California Secretary
                  --------------   
of State indicating that as of the Closing Date, or as close thereto as
practicable, there are no filings against Seller in said office under the
California Uniform Commercial Code which would be a lien on any of the Tangible
Personal Property (other than filings, if any, as are being released at the time
of the closing);

          5.2.10  [INTENTIONALLY OMITTED.]

          5.2.11  EVIDENCE OF AUTHORITY.  If Seller is a corporation, a 
                  ---------------------   
certified copy of a corporate resolution adopted by Seller authorizing sale of
the Property. If Seller is a partnership, then copies (certified by Seller to be
true and complete) of Seller's partnership agreement, certificate of limited
partnership as filed with the California Secretary of State, any statement of
partnership recorded by the County recorder, and such corporate authorizing
resolutions by each acting corporate general partner, if any. In any event, such
other certificates or documents as may be reasonably required by Title Company
or Escrow Holder in order to cause the Title Policy to be issued and Escrow to
be closed;

          5.2.12  FIRPTA OR CALFIRPTA INSTRUMENTS.  Proper certificates
                  -------------------------------                      
satisfactory to Buyer confirming Seller's status as represented in Section 7.3.7
below; and

          5.2.13  ADDITIONAL ITEMS.  Any additional funds and/or instruments,
                  ----------------                                           
signed and properly acknowledged and delivered by Seller, if appropriate, as may
be necessary to comply with Seller's obligations under this Agreement.

     5.3  DEPOSITS BY BUYER.  Before the last business day prior to the Closing
          -----------------                                            
Date, Buyer shall deliver to Escrow Holder:

          5.3.1   FUNDS.  On or before the Closing Date, immediately available
                  -----                                                       
funds in an amount equal to the Closing Funds as described in Section 3.1.3.

          5.3.2   ASSIGNMENT(S).  By the time Seller is obligated to deliver the
                  -------------                                                 
same, duly executed counterparts of the Assignment of Leases (duly acknowledged
by Buyer) and the General Assignment described above;

          5.3.3   [INTENTIONALLY OMITTED]

                                       8
<PAGE>
 
          5.3.4   CHANGE OF OWNERSHIP REPORT.  A Preliminary Change of Ownership
                  --------------------------                                    
Report pursuant to California Revenue and Taxation Code Section 480.3; provided,
that if Buyer does not complete and deliver into escrow its executed report
prior to the closing, then Escrow Holder is authorized and instructed to charge
Buyer the applicable sum and to pay that sum to the County Recorder as a
penalty; and

          5.3.5   ADDITIONAL ITEMS.  Any additional funds and/or instruments,
                  ----------------                                           
signed, properly acknowledged and delivered by Buyer, if appropriate, as may be
necessary to comply with this Agreement.

     5.4  ISSUANCE OF TITLE POLICY.  At the Close of Escrow, and as a condition 
          ------------------------                                   
to Closing, Title Company shall be in a position to issue to Buyer, its ALTA
Extended Coverage Owner's Policy of Title Insurance (1970) (the "Title Policy"),
with liability in the amount of the Purchase Price, covering the Property and
insuring fee title vested in Buyer, free of all encumbrances, except:

          5.4.1   All non-delinquent general real property taxes;

          5.4.2   Matters approved by Buyer with written notice to Escrow Holder
during the Contingency Period; and

          5.4.3   Any other matters approved by Buyer with written notice to
Escrow Holder.

As a further condition to Closing, Buyer may obtain from the Title Company such
additional endorsements as Buyer may require, at Buyer's sole expense.

     5.5  PRORATIONS.
          ---------- 

          5.5.1   TAXES AND ASSESSMENTS.  All property taxes and approved
                  ---------------------                                  
assessments on the Property and any service and maintenance charges for the
Property, whether paid in installments or not, shall be prorated between Buyer
and Seller as of the Closing Date based on the most current statements and
information available to Escrow Holder or otherwise provided by Seller, but
without regard to any supplemental or subsequent reassessments. If the Property
is part of a larger tax assessor's parcel, then the taxes allocable to the
Property shall be determined pro rata on the basis of relative acreage. Buyer
and Seller shall also prorate as of the Closing Date, but outside of Escrow, any
supplemental taxes levied by reason of events occurring prior to the Closing,
promptly upon receipt thereof.

          5.5.2   RENTS.  All collected rents payable by Tenants shall be
                  -----                                                  
prorated through Escrow as of the Closing Date based on the updated Rent Roll.
Rents earned and attributable to the period beginning on the Closing Date and
continuing thereafter will belong and be credited or paid to Buyer. Buyer shall
not be obligated to make any payment or give any credit to Seller for any rents
which are still unpaid as of the Closing Date, but Seller shall be entitled to
its share of such rents if, as and when they are received by either Buyer or
Seller, but only after all rents are brought current and paid to Buyer as
provided above.

                                       9
<PAGE>
 
          5.5.3   LEASE OPERATING COST PASS-THROUGHS.  All operating cost pass-
                  ----------------------------------                          
throughs for taxes, utilities, common area maintenance charges or other current
operating costs and cost of living escalation amounts paid by Tenants under the
Leases shall be estimated to the extent feasible based upon Seller's records and
shall, in accordance with such estimations, be prorated through Escrow between
Buyer and Seller as of the Closing Date. All amounts received by Seller prior to
Closing as estimated pass-throughs for any such matters in excess of the amounts
prorated to Seller shall be delivered or credited to Buyer.

          [5.5.4  [INTENTIONALLY OMITTED].

          5.5.5   SECURITY DEPOSITS.  Buyer shall be credited and Seller shall
                  -----------------              
be charged through Escrow with any security deposits under the Leases as
reflected in the updated Rent Roll.

          5.5.6   OTHER OPERATING EXPENSES.  Utilities and other operating
                  ------------------------                                
expenses shall be prorated outside of Escrow as of the Closing Date. If actual
meter readings are not obtainable, then Escrow Holder shall prorate such charges
using the per diem rate and average meter units used as calculated from the
latest available billings or other operating history of the Property over the
past year provided by Seller. After the Closing, outside of Escrow, the parties
shall make any readjustments necessary based upon a final billing obtained by
Buyer or actual subsequent readings of utility meters respecting that billing
period in which the Closing occurred. All utility security deposits of Seller,
if any, shall either be retained by Seller or at Buyer's option shall be
delivered to Buyer and credited to Seller.

          5.5.7   ADJUSTMENTS.  Any item to be prorated that is not determined
                  -----------   
or determinable at the Closing shall be promptly adjusted by Buyer and Seller by
appropriate cash payments outside of Escrow when the amount due is determined.
Either party shall be entitled to request such an adjustment, by written demand
on the other party, at any time within six (6) months after the Closing Date.

     5.6  CLOSING COSTS.  Seller shall pay for the cost of a CLTA Owner's
          -------------                                                  
Policy of title insurance, all documentary transfer taxes, one-half (1/2) of all
Escrow costs and fees, and the cost of recording reconveyances of existing
monetary encumbrances on the Land. Buyer shall pay for recording the Grant Deed,
one-half (1/2) of all Escrow costs and fees, the additional cost of issuing an
ALTA Extended Coverage Owner's Policy of title insurance, any additional Title
Policy endorsements and any other costs or expenses relating to Buyer's
obtaining financing to acquire the Property. Buyer and Seller shall each bear
their own legal and accounting costs and fees.

     5.7  DISBURSEMENTS BY ESCROW HOLDER.  Upon the Close of Escrow, Escrow
          ------------------------------                                   
Holder shall disburse all funds deposited with Escrow Holder by Buyer in payment
of the Purchase Price, as follows:

          5.7.1   Pay therefrom all closing costs, prorations, deposits and
other items chargeable to the account of Seller as provided above;

                                      10
<PAGE>
 
          5.7.2   If Buyer elects to pay off the lender holding a deed of Trust
on the Property, pay the demand of the secured lender of record based on
information provided in advance by Seller and confirmed in writing by such
lender; and

          5.7.3   The remaining balance of the Closing Funds shall be disbursed
to or at the direction of Seller promptly upon the Close of Escrow.

     5.8  COMPLETION AND DISTRIBUTION OF DOCUMENTS.  Escrow Holder shall also
          ----------------------------------------                           
undertake the following at or promptly after the Close of Escrow:

          5.8.1   If necessary, Escrow Holder is authorized and instructed to
insert the date on which Escrow closes as the date of any documents conveying
interests herein or to become operative as of the Closing Date;

          5.8.2   Cause the Grant Deed and any other recordable instruments, in
the sequence which the parties so direct, to be recorded in the Official Records
of the Recorder of the County in which the Land is located and thereupon to be
delivered to the grantee or assignee thereunder. Escrow Holder is hereby
instructed not to affix the amount of the documentary transfer tax on the face
of the Deed, but to pay on the basis of a separate affidavit of Seller not made
a part of the public record, in accordance with Section 11932 of the California
Revenue and Taxation Code; and

          5.8.3   Cause each non-recorded document to be delivered to the person
acquiring rights thereunder, or for whose benefit such document was obtained.

6.   DEFAULTS AND REMEDIES
     ---------------------

     6.1  DEFAULT BY EITHER PARTY.  If Escrow fails to close when and as 
          -----------------------                                       
provided in Section 5 above due to the failure or breach of either party to
perform any obligation under this Agreement, or if either party's
representations and warranties are not true and correct, then the nondefaulting
party may elect, by written notice to the defaulting party and to Escrow Holder,
to terminate Escrow and this Agreement. That termination shall be effective
three (3) days after delivery of such notice; provided, that (i) the
                                              --------              
nondefaulting party has performed or is in a position to perform all conditions
on its part to be performed as of the termination date; and (ii) the defaulting
party has not cured the default and the nondefaulting party has not waived such
default by the effective termination date. Except as otherwise provided in this
Section 6, Escrow Holder and the parties shall, upon such termination, return
all funds (including interest thereon) and documents then held by them to the
party depositing or delivering the same. Thereafter, each of the parties shall
be discharged and released from all obligations and liabilities except as
otherwise provided in Section 6.4.

     6.2  CANCELLATION CHARGES.  A defaulting party shall be liable for all
          --------------------                                             
escrow, title cancellation and similar charges, in addition to any other damages
or remedies due the nondefaulting party (except as limited by Sections 6.1 or
6.3). If Close of Escrow fails to occur for any reason other than a party's
default, Buyer and Seller shall each pay one-half (1/2) of any escrow title
cancellation and similar charges.

                                      11
<PAGE>
 
     6.3  LIQUIDATED DAMAGES.  IF BUYER FAILS TO COMPLETE THE PURCHASE OF THE
          ------------------                                                 
PROPERTY AND SUCH FAILURE CONSTITUTES A MATERIAL BREACH OF THIS AGREEMENT,
BUYER, BY ITS INITIALS FOLLOWING THIS PARAGRAPH, AGREES THAT THE DEPOSIT, PLUS
ALL INTEREST ACCRUED THEREON, SHALL CONSTITUTE LIQUIDATED DAMAGES TO SELLER FOR
SUCH BREACH BY BUYER. THE PAYMENT OF SUCH AMOUNT IS NOT INTENDED AS A FORFEITURE
OR A PENALTY WITHIN THE MEANING OF CALIFORNIA CIVIL CODE SECTIONS 3275 OR 3369
OR SIMILAR AUTHORITIES, BUT IS INTENDED TO CONSTITUTE LIQUIDATED DAMAGES TO
SELLER PURSUANT TO THE REQUIREMENTS OF CALIFORNIA CIVIL CODE SECTIONS 1671, 1676
AND 1677. IN CONSIDERATION FOR BUYER'S AGREEMENT TO PAY SUCH LIQUIDATED DAMAGES,
SELLER HEREBY WAIVES ALL OTHER CLAIMS FOR DAMAGES AND FOR SPECIFIC PERFORMANCE
AGAINST BUYER, INCLUDING WITHOUT LIMITATION ANY RIGHTS THAT SELLER MAY HAVE
UNDER CALIFORNIA CIVIL CODE SECTIONS 1680 AND 3389. BUYER AND SELLER EACH AGREES
THAT THE AFORESAID SUM IS A FAIR AND REASONABLE AMOUNT FOR LIQUIDATED DAMAGES
FOR SUCH A BREACH UNDER THE CIRCUMSTANCES EXISTING AT THE TIME THIS AGREEMENT IS
ENTERED INTO.

     ______________________   ______________________________
     Buyer's Initials         Seller's Initials

     6.4  SPECIFIC PERFORMANCE BY SELLER.  If Seller defaults under any
          ------------------------------                               
obligation in this Agreement, then in lieu of termination as provided in Section
6.1 and in addition to any other rights and remedies at law or in equity, Buyer
may compel specific performance by Seller of Seller's obligation to convey the
Property in the condition required in Sections 4.1 and 5.2.

7.   REPRESENTATIONS AND WARRANTIES
     ------------------------------

     7.1  IN GENERAL.  In addition to any express agreements of either party
          ----------                                                        
contained herein, the following constitute representations and warranties by
each party of either or both of the parties to the other, which shall be true
and correct in each case as of the date hereof. The representations and
warranties shall continue to be true and correct at the end of the Contingency
Period and the Close of Escrow, and the truth and accuracy shall constitute a
condition to the Close of Escrow for the benefit of the party to whom such
representations and warranties were made.

          Notwithstanding anything to the contrary herein, the effect of any
representations, warranties, covenants and agreements made by Seller in this
Agreement shall not be diminished or deemed to be waived by any inspections,
tests or investigations made by Buyer or its agents.

     7.2  BY EACH PARTY.  Each party hereto covenants, represents and warrants
          -------------                                                       
to the other as follows:

                                      12
<PAGE>
 
          7.2.1   AUTHORITY.  Such party has full power and authority to enter
                  ---------                                                   
into and comply with the terms of this Agreement, and the individuals executing
this Agreement on behalf of such party have actual right and authority to bind
that party to the terms of this Agreement, without requiring any further consent
to the execution, delivery and performance of that party hereunder by any person
or entity.

          7.2.2   BINDING EFFECT.  No action or consent which has not been
                  --------------                                          
obtained is necessary to make this Agreement, and this Agreement and all
documents to be executed hereunder are the valid and legally binding obligations
of such party, enforceable in accordance with their respective terms; and

          7.2.3   COMPLIANCE.  To the best knowledge of such party, this
                  ----------                                            
Agreement and that party's performance of the obligations herein contained do
not and will not contravene any provision of any present judgment, order,
decree, writ or injunction, or any provision of any Laws currently applicable to
such party, or any evidence of indebtedness or security therefor or other
agreement, covenant or restriction by which such party or any of such party's
properties may be bound.

     7.3  BY SELLER ONLY.  Seller covenants, represents and warrants to Buyer,
          --------------                                                      
as follows:

          7.3.1   HAZARDOUS SUBSTANCES.  Consistent with Seller's disclosure
                  --------------------                                      
obligations contained in California Health & Safety Code Section 25359.7, Seller
has no knowledge that (except for cleaning agents, photocopying chemicals and
other substances used in the ordinary course of normal building and maintenance
operations on the Property) there has been used, installed, generated, produced,
stored, or released on, under or about the Land, or transported to or from the
Property, or into any groundwater (other than sanitary sewer systems established
for such purpose), any underground storage tanks, asbestos, PCBs, urea
formaldehyde, oils, petroleum or by-products thereof or any other toxic or
hazardous waste, material or substance, as those or any similar terms are now or
in the future used or defined in any Laws (herein "Hazardous Substance"). Seller
has not released any other person or entity from any liability for any such
environmental matters and no liens have been or are imposed on the Property
under any environmental Laws.

          7.3.2   NO VIOLATIONS; PENDING ACTIONS.  To Seller's knowledge, 
                  ------------------------------                             
(i) Seller has received no notice or claim from any government authority or any
other private party relating to a breach or violation of any Laws or any permits
or private covenants or restrictions relating to any Hazardous Substance or
other adverse environmental or other defective condition respecting the Project
or any ground water related thereto, (ii) there are no pending or threatened
legal or administrative proceedings regarding the Property (including but not
limited to any property damage, public or personal liability claims,
condemnation proceedings, future public assessment or similar proceedings or
charges, except as shown in the Title Documents).

          7.3.3   NO OPTIONS, ETC.  Seller has not obligated itself to sell or
                  ---------------                                             
offer for sale any portion of the Property to any party other than Buyer. Seller
has not hypothecated or

                                      13
<PAGE>
 
assigned any rents or income from the Property except pursuant to any secured
financing which has been disclosed in writing by Seller to Buyer.

          7.3.4   POSSESSION AND LIENS.  Subject to the rights of Tenants under
                  --------------------                                         
the Leases, and matters shown on the Title Report approved by Buyer, complete
and unconditional possession of the Property shall be delivered to Buyer at
Close of Escrow, free from any liens, bonded indebtedness or other assessments
for any water, sewer, traffic or other improvement district imposed by any
private or governmental entity, or otherwise.

          7.3.5   TRUTHFULNESS.  All information and items regarding the 
                  ------------   
Property provided by Seller to Buyer are true, accurate and complete in all
respects and are fairly presented in a manner that is not misleading.

          7.3.6   DOCUMENTS.  Seller has no knowledge of the existence of any
                  ---------                                                  
Property Documents of the type described in Section 4.2 above that were not
delivered to Buyer as provided therein. Seller is not in default under any
documents referred to in the Title Documents or under any contracts comprising
part of the Intangible Property.

          7.3.7   NON-FOREIGN STATUS.  In accordance with (a) Section 1445 of 
                  ------------------   
the Internal Revenue Code, Seller is not now, and at the Closing will not be, a
"foreign person" (as defined therein), and (b) California Revenue and Taxation
Code Section 18805 and 26131, Seller is neither (i) a non-California resident
                                        -------                              
with its principal address outside the state of California, or is causing the
                                                            --               
sales proceeds to be paid to a financial intermediary, nor is (ii) a
                                                       ---          
partnership, a bank acting as a trustee (other than as a trustee under a deed of
trust) or a corporation acting as a beneficiary under a deed of trust in order
       --                                                                     
to acquire the real property hereunder by foreclosure or by deed in lieu of
foreclosure.  Accordingly, Buyer need not withhold any state or federal tax at
the Closing as a result of this transfer.  Seller shall sign and deliver prior
to the Closing a separate affidavit in form and substance satisfactory to Buyer
and Escrow Holder confirming the foregoing information and providing Seller's
tax identification number.

          7.3.8   LEASES.  In respect of each of the Leases, except as provided
                  ------                                                       
in the Rent Roll approved by Buyer and provided in Section 4.4 above, the
following information is true and correct: (i) each of the Leases is in full
force and effect according to the terms set forth therein and in the Rent Roll
and has not been further modified, amended, extended or assigned by Seller, in
writing or otherwise, and each Tenant under the Leases is legally required to
pay all sums and perform all obligations set forth in the Leases, without
further concessions, abatements, offsets, defenses or other basis for relief or
adjustment; (ii) all obligations of the Seller, as landlord, under the Leases
which have accrued prior to Closing will be performed by Closing; (iii) except
as disclosed in the Estoppel Certificates delivered by Seller or any Tenant as
provided in (S) 5.2.7 above, to Seller's best knowledge no Tenant has asserted
or has any defense to, or any offsets or claims against, any rent payable by it
after the date hereof, or the performance of any other obligations under such
Tenant's respective Lease; (iv) to Seller's best knowledge, no Tenant is in
default under or in arrears in the payment of any sum payable or in the
performance of any obligation required of it under its Lease and no Tenant has
prepaid any rent or other charges; (v) Seller has received no notice that any
Tenant is unable or unwilling to perform any or all of its obligations under its
Lease; (vi) Seller has not applied and shall not

                                      14
<PAGE>
 
apply any security deposit from a Tenant to rent or any other obligation due
from any Tenant without Buyer's prior written consent; (vii) all work required
to be done by Seller, as landlord under each such Lease, has been or by the
Closing will be done or furnished unless otherwise agreed by the parties, and no
Tenant is entitled to any additional work during the term of its Lease; 
(viii) each Tenant is current in the payment of all rents, amounts and
reimbursements due to Seller under its respective Lease, including but not
limited to all taxes, assessments, repairs and maintenance charges, insurance
premiums, utilities or other charges or expenses; (ix) neither the Leases nor
the rents or any other amounts payable thereunder have been assigned, pledged or
encumbered by Seller except for such mortgages, pledges or other encumbrances
agreed to become or remain in effect at Closing; (xi) Seller has not received
from any Tenant written notice of any presently pending dispute regarding the
calculation or payment of rent, the terms of any Lease or any alleged default by
Seller, as lessor, under such Lease, or of any bankruptcy, receivership,
custodianship, reorganization, insolvency, assignment for benefit of creditors
or other proceeding of a similar nature respecting any Tenant, any Lease or the
Property; and (xii) Seller shall pay and retain full responsibility for all
expenses connected with or arising out of the negotiation, execution and
delivery of the Leases, including but not limited to brokers' commissions and
leasing fees remaining unpaid at the Closing.

          7.3.9   LEASING FEES.  Upon consummation of the purchase and sale
                  ------------                                             
herein, in addition to matters covered by Section 10 below, there will be no
brokerage or leasing fees or commissions or other compensation due or payable to
any person, firm, corporation, or other entity, with respect to or on account of
any of the Leases and no such fees, commissions or other compensation shall, by
reason of any existing agreement, become due during the terms of any of the
Leases or with respect to any renewal or extension thereof or the leasing of
additional space by any Tenant which are not subject to an arrangement for full
payment and satisfaction by Seller as described in Section 7.3.8 (xii) above.

          7.3.10  NO EMPLOYEES.  Seller does not employ any employees at the
                  ------------                                              
Project.

          7.3.11  NO MECHANICS LIENS.  Seller shall have paid for all work, 
                  ------------------   
labor and materials furnished to it in connection with the Property prior to
Closing; and will indemnify and hold Buyer harmless from any mechanic's or
materialmen's liens, filed or otherwise claimed, in connection with any such
work, labor and materials performed on or furnished in connection with the
Property prior to Closing, and any and all legal and related expenses incurred
by Buyer by reason thereof.

          7.3.12  PARKING REQUIREMENTS.  All vehicle parking space requirements
                  --------------------                                         
imposed by applicable Laws relating to the Property are satisfied solely by on-
site parking, without the necessity of any off-site parking arrangements.

          7.3.13  MEANING OF KNOWLEDGE.  Wherever in this Section 7 Seller's
                  --------------------                                      
representations and warranties are limited to Seller's knowledge, the term,
"knowledge" shall mean those matters which are known by David A. Brown or Jack
Stafford. Seller represents and warrants that no other person employed by Seller
or related to Seller is or has been in a position to have knowledge not
possessed by David A. Brown or Jack Stafford.

                                      15
<PAGE>
 
          7.3.14  ACCURACY OF REPRESENTATIONS AND WARRANTIES.  No representation
                  ------------------------------------------                    
or warranty or any statement furnished by Seller to Buyer contains any untrue
statement of material fact or omits to state a material fact necessary to make
the statements contained herein or therein not misleading.

8.   OPERATION OF THE PROPERTY BEFORE CLOSING
     ----------------------------------------

     8.1  MAINTENANCE. At all times prior to the Closing, Seller shall continue 
          -----------                                                  
to cause the Property to be maintained in full compliance with all Laws and in
the ordinary and usual course of business, and shall pay when due all of
Seller's obligations under all Leases, service contracts and other agreements
affecting the Property. In particular, Seller shall pay and fully discharge all
mechanic's or similar liens against the Property.

     8.2  INSURANCE.  Seller will keep in full force and effect all existing
          ---------                                                         
insurance policies affecting the Property or any portion thereof through the
Close of Escrow.

     8.3  PERMITS.  To the extent practicable, Seller will keep in effect, and
          -------                                                             
will renew when necessary at Buyer's expense, all existing licenses and permits
affecting the Property.

     8.4  RISK OF LOSS.  All risks of loss concerning the Property shall be
          ------------                                                     
borne solely by Seller until the Closing Date. Seller shall immediately give
Buyer notice of any damage or destruction of the Property or any portion thereof
(including any soils subsidence), the cost of restoration and repair of which
would exceed $50,000. Seller may elect to repair or restore any such damage or
destruction and to extend the Closing Date up to 90 additional days by giving
Buyer and Escrow Holder written notice of that election within 10 days after the
occurrence of any such damage or destruction. If Seller does not make such
election, then Buyer shall proceed to purchase the Property and consummate this
Agreement in accordance with its terms unless, within five (5) business days
after Seller's delivery of its notice, Buyer elects in writing to terminate this
Agreement, in which event Buyer and Seller shall share equally all escrow and
title cancellation costs. If Buyer proceeds to Closing, Seller at the Closing
shall assign to Buyer all of Seller's right, if any, to receive with the Grant
Deed an assignment of Seller's rights to any insurance proceeds to which Seller
is entitled in connection with such damage or destruction.

     8.5  CONDEMNATION.  If any portion of the Property, or any interest 
          ------------                                                  
therein, is proposed to be taken before the Closing Date as a result of any
street widening or other condemnation (including the filing of any notice of
intended condemnation or proceedings in the nature of eminent domain), Seller
shall immediately give Buyer notice of such threat. Buyer shall nonetheless
proceed with the purchase of the Property and consummate this Agreement in
accordance with its terms unless, within ten (10) days after Seller delivers its
notice, Buyer elects in writing to terminate this Agreement, in which event
Buyer and Seller shall share equally in all Escrow and title cancellation costs.
If Buyer proceeds to Closing, Seller at the Closing shall assign to Buyer all of
Seller's right to receive condemnation award, except for any award to Seller for
a temporary taking of any portion of the Property for a period up to but not
beyond the Closing.

                                      16
<PAGE>
 
     8.6    APPROVAL OF LEASES AND CONTRACTS.  Seller shall diligently pursue
            --------------------------------                                 
the leasing of all remaining unleased space within the Improvements at the best
feasible rents and provisions and at reasonable leasing fees and commissions to
be payable by Buyer.  In addition, Buyer acknowledges that Seller may need to
enter into further leases and contracts required in the ordinary course of
business to occupy, operate and maintain the Property which will survive the
Close of Escrow.  Seller shall obtain the prior written approval of Buyer, which
approval shall not be unreasonably withheld or delayed, before entering into any
new leases or lease modifications that provide for any one or more of the
following:

            a.   For more than 2,000 square feet;

            b.   At a full service gross rental rate of less than $1.85 per
square foot per month; and/or

            c.   For a period in excess of thirty-six months.

Except as otherwise may be specifically agreed between Seller and Buyer, Seller
shall pay and be fully responsible for all expenses relating to the Leases or
any future leases or contracts executed prior to the Closing, including but not
limited to brokerage or leasing fees or commissions respecting any renewal or
extension term, any tenant improvement costs and the like.

9.   POST-CLOSING MATTERS
     --------------------

     9.1    NOTICES TO TENANTS.  As soon as practicable after the Closing,
            ------------------                                            
Seller shall cause a notice in the form of Exhibit "K" to be delivered to Buyer
                                           -----------                         
for delivery to all Tenants shown on the Rent Roll, updated as of the Closing.

     9.2    CONFIDENTIALITY.  Each party shall hold in strict confidence all
            ---------------                                                 
information received from the other party concerning this transaction and shall
not release any such information to third parties (other than attorneys,
accountants, lenders or prospective partners or associates) without the prior
written consent of the other party unless otherwise required by law.  Buyer and
Seller will jointly prepare and issue any and all releases of information to the
public relating to the sale of the Property.  Each party will undertake to
consult with the other prior to responding to any inquiries made by any person
respecting the transactions contemplated by this Agreement.

10.  BROKERS
     -------

     Seller and Buyer each represents and warrants to the other that no broker
or finder or other real estate agent is entitled to any commission, finder's fee
or other compensation resulting from any action on its part other than The
Seeley Companies, which will be paid solely by Seller pursuant to a separate
commission agreement between Seller and such broker(s).  If payment is to be
made through Escrow, the party responsible for such commission shall advise
Escrow Holder of the address of the broker and other pertinent information
reasonably required by Escrow Holder.  Each party agrees to indemnify, defend
and hold the other harmless against any

                                      17
<PAGE>
 
claim, loss, damage, cost or liability for any broker's commission or finder's
fee for which it is responsible or which is asserted as a result of its own act
or omission in connection with this transaction.

11.  MISCELLANEOUS PROVISIONS
     ------------------------

     11.1   ASSIGNMENT; BINDING ON SUCCESSORS.  This Agreement shall be binding
            ---------------------------------                                  
upon and shall inure to the benefit of Buyer and Seller and their respective
representatives, successors and assigns.  Before Close of Escrow, Buyer shall
have the right to assign all or any portion of its interest in this Agreement
and the Escrow to any person or entity.

     11.2   FEES AND OTHER EXPENSES.  Except as otherwise provided herein, each
            -----------------------                                            
of the parties hereto shall pay its own fees and expenses in connection with
this Agreement. In any dispute or action between the parties arising out of this
Agreement or the Escrow, or in connection with the Property, the prevailing
party shall be entitled to have and recover from the other party all losses,
damages, costs and expenses (including without limitation court costs and
reasonable attorneys' fees) related thereto, whether by final judgment or by out
of court settlement.

     11.3   APPROVAL AND NOTICES.  Any approval, disapproval, demand, document
            --------------------                                              
or other notice or communication ("Notice") required or permitted to be given
hereunder shall be in writing and may be served personally, by commercial
delivery or private courier service, or by registered or certified mail (return
receipt requested, postage prepaid), or by telecopy or fax transmission to the
respective numbers shown below, which Notice shall be effective (i) upon
personal delivery, (ii) when received as indicated by the date on the return
invoice or receipt showing delivery, or (iii) when sent by telecopy or fax, with
receipt and legibility telephonically confirmed and with written proof of
transmittal to and receipt by the other party being established mechanically by
the sender at the time of transmittal. The parties' addresses for Notices are as
follows:

          IF TO SELLER:

          David A. Brown
          Pacifica Real Estate Group
          1035 Anacapa Street
          Santa Barbara, CA 93101
          Telephone:  (805) 899-2400
          Facsimile:  (805) 899-2424

                                      18
<PAGE>
 
          COPY TO:

          Thomas J. Gamble
          1035 Anacapa Street
          Santa Barbara, CA 93101
          Telephone:  (805) 899-2400
          Facsimile:  (805) 899-2424

          IF TO BUYER:

          Kilroy Industries
          2250 East Imperial Highway
          El Segundo, CA 90245
          Attn:  Jeffrey C. Hawken
          Telephone:  (213) 772-1193
          Facsimile:  (310) 640-3148

          COPY TO:

          LATHAM & WATKINS
          650 Town Center Drive, Twentieth Floor
          Costa Mesa, California 92626
          Attn:  Bruce Tester
          Telephone:  (714) 540-1235
          Facsimile:  (714) 755-8290

Notice of change of any address, telephone or fax numbers shall be given by
written notice in the manner detailed in this paragraph. Rejection or other
refusal to accept or the inability to deliver because of changed address of
which no Notice was given shall be deemed to constitute receipt of the Notice.

     11.4   JURISDICTION.  This Agreement shall be construed under the laws of
            ------------                                                      
the State of California.  The parties hereby consent to any venue and
jurisdiction of any state or federal court sitting in the judicial district in
which the Land is located.

     11.5   INTERPRETATION.  All provisions herein shall be construed in all
            --------------                                                  
cases as a whole according to its fair meaning, neither strictly for nor against
either Buyer or Seller and without regard for the identity of the party
initially preparing the same.  Titles and captions are inserted for convenience
only and shall not define, limit or construe in any way the scope or intent of
this Agreement.  References to sections are to sections as numbered in this
Agreement unless expressly stated otherwise.

     11.6   GENDER.  As used in this Agreement, the masculine, feminine or
            ------                                                        
neuter gender and the singular or plural number shall each be deemed to include
the others where and when the context so dictates.

                                      19
<PAGE>
 
     11.7   NO WAIVER.  A waiver by either party of a breach of any of the
            ---------                                                     
covenants, conditions or agreements to be performed by the other party shall not
be construed as a waiver of any succeeding breach of the same or other
covenants, conditions or agreements.

     11.8   MODIFICATIONS.  Any alteration, change or modification of or to this
            -------------                                                       
Agreement, in order to become effective, must be made in writing and in each
instance signed on behalf of each party to be charged.

     11.9   SEVERABILITY.  If any term, provision, condition or covenant of this
            ------------                                                        
Agreement or its application to any party or circumstances shall be held, to any
extent, invalid or unenforceable, the remainder of this Agreement, or the
application of the term, provision, condition or covenant to persons or
circumstances other than those as to whom or which it is held invalid or
unenforceable, shall not be affected, and shall be valid and enforceable to the
fullest extent permitted by law.

     11.10  SURVIVAL.  All representations, warranties, indemnities, covenants
            --------                                                          
or agreements by either Buyer or Seller contained in this Agreement shall
survive the Closing for a period of one year, except that any representation or
warranty which is fraudulent when made shall survive for the period of the
applicable statute of limitations., The representations, warranties,
indemnities, covenants and agreements shall not be merged into any conveyance or
instrument delivered at the Closing.

     11.11  MERGER OF PRIOR AGREEMENTS.  This Agreement contains the entire
            --------------------------                                     
understanding between the parties relating to the transaction contemplated by
this Agreement. All prior or contemporaneous agreements, understandings,
representations and statements, whether direct or indirect, oral or written, are
merged into and superseded by this Agreement, and shall be of no further force
or effect.

     11.12  TIME OF ESSENCE.  Time is of the essence of this Agreement.
            ---------------                                            

     11.13  COUNTERPARTS.  This Agreement may be signed in multiple counterparts
            ------------                                                        
which, when duly delivered and taken together, shall constitute a binding
Agreement between all parties.

     11.14  EXHIBITS.  All exhibits attached to this Agreement are incorporated
            --------                                                           
herein by reference.

     11.15  COOPERATION OF PARTIES.  Each party agrees to cooperate in good
            ----------------------                                         
faith with the other party in all aspects of accomplishing the intent of this
Agreement, including but not limited to signing documents and taking other
actions as may be reasonably necessary or proper for such purpose.

     11.16  NO THIRD PARTY BENEFICIARIES.  Except as otherwise expressly
            ----------------------------                                
provided herein, the provisions of this Agreement are intended to be solely for
the benefit of the parties hereto, and the execution and delivery of this
Agreement shall not be deemed to confer any rights upon, nor obligate any of the
parties hereunder, to any person or entity other than the parties hereto.

                                      20
<PAGE>
 
     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the date first above written.

                              "SELLER":

                              WESTLAKE PLAZA PARTNERS,
                              a California limited partnership

                              By: Pacifica Real Estate Group, a California
                                  corporation, a General Partner


                              By:
                                  ----------------------------------------
                                  Name:
                                        ----------------------------------
                                  Title:
                                        ----------------------------------


                              "BUYER":

                              KILROY INDUSTRIES, a California corporation



                              By:
                                  ----------------------------------------
                                  Name:
                                        ----------------------------------
                                  Title:
                                        ----------------------------------


"ESCROW HOLDER:"

The undersigned acknowledges receipt
of this Agreement and agrees to act
in accordance with all applicable
provisions contained herein.

CONTINENTAL LAWYERS TITLE INSURANCE COMPANY



By:
    ------------------------------
  Name:
        --------------------------
  Title:
        --------------------------

                                      21
<PAGE>
 
                               TABLE OF EXHIBITS
                               -----------------

<TABLE>
<CAPTION>
 
                                                                       Page
No.       Description                                               References
- ---       -----------                                               ---------- 
<S>       <C>                                                       <C>
 
A         Legal description of Land                                       1 
                                                                            
B         Map or depiction of Land                                        1 
                                                                            
C         Escrow General Provisions                                       2 
                                                                            
D         Grant Deed and D.T.T. Statement                                 7 
                                                                            
E         Assignment of Leases                                         2, 7 
                                                                            
F         General Assignment                                              7 
                                                                            
G         Bill of Sale                                                    7 
                                                                            
H         Rent Roll                                                 2, 5, 7 
                                                                            
I         Tenant Estoppel Certificate                                     7 
                                                                            
J         Landlord Estoppel Certificate                                   7 
                                                                            
K         Seller's Notice to Tenants                                     18  
</TABLE> 

                               Table of Exhibits
                               -----------------
<PAGE>
 


                           LEGAL DESCRIPTION OF LAND
                           -------------------------



                               [To be provided]




                                  Exhibit "A"
                                  -----------

<PAGE>
 
                           MAP OR DEPICTION OF LAND
                           ------------------------



                               [To be provided]



                                  Exhibit "B"
                                  -----------
<PAGE>
 
                                  EXHIBIT "C"

                           GENERAL ESCROW PROVISIONS
                           -------------------------


1.    All funds received in this escrow shall be deposited in a separate escrow
      fund account or accounts of _______________ TITLE COMPANY (for the benefit
      of the parties hereto) with one or more state or national banks duly
      qualified to do business in the State of California, so that each such
      account shall be fully insured at all times by the Federal Deposit
      Insurance Corporation, to the maximum extent permitted by law.  All
      disbursements shall be made by check of ______________ TITLE COMPANY.

2.    You are authorized to prepare, obtain, record and deliver the necessary
      instruments to carry out the terms and conditions of this escrow and to
      order to be issued at close of escrow the policy of title insurance as
      called for in these instructions.  Close of escrow shall mean the date
      instruments are recorded.

3.    All adjustments and prorations shall be made on the basis of a 30-day
      month.

4.    If applicable, you are instructed to assign any fire and casualty
      insurance policy delivered to you and to secure any endorsements required
      in the performance of these instructions.  You may assume that said policy
      is in full force and effect and that all premiums due have been paid.

5.    Subject to the provisions of Section 15 below, you are not to be held
      accountable or liable for the sufficiency or correctness as to form,
      manner of execution, or validity of any instrument deposited in this
      escrow, nor as to the identity, authority or rights of any person
      executing the same.  Your duties hereunder shall be limited to the proper
      handling of such money and the proper safekeeping of such instruments, or
      other documents received by you as escrow holder, and for the disposition
      of same in accordance with the written instructions accepted by you in
      this escrow.

6.    You shall have no responsibility of notifying me or any of the parties to
      this escrow of any sale, resale, loan, exchange or other transaction
      involving any property herein described or of any profit realized by any
      person, firm or corporation in connection therewith, regardless of the
      fact that such transaction(s) may be handled by you in this escrow or in
      another escrow.

7.    No notice, demand or change of instruction shall be of any effect in this
      escrow unless given in writing by all parties affected thereby and except
      as otherwise specifically provided in the Agreement to which these General
      Provisions are attached.  In the event a demand for the funds on deposit
      in this escrow is made, not concurred in by all parties hereto, the escrow
      holder, regardless of who made demand therefor, may elect to do any of the
      following:

                                  Exhibit "C"
                                  -----------
<PAGE>
 
      i.       After three (3) business days from the date escrow holder was
               first notified that the escrow is to be cancelled and/or demand
               for funds was made, absent mutually concurring instructions
               providing for payment of funds and the disposition to be made of
               this escrow, the escrow holder may return all funds and documents
               to the parties depositing same, and without liability therefor.

      ii.      Withhold and stop all further proceeding in, and performance of,
               this escrow pending a resolution of any conflict by and between
               the parties hereto.

      iii.     File a suit in interpleader and obtain an order from the court
               allowing escrow holder to deposit all funds and documents in
               court and have no further liability hereunder, except for its own
               negligent or willful misconduct or any breach by escrow holder of
               any obligations in this Agreement.

8.    If the conditions of this escrow have not been complied with at the time
      herein provided, you are nevertheless to complete the same as soon as the
      conditions (except as to time) have been complied with, unless Buyer has
      made written demand upon you for the return of money and instruments
      deposited by Buyer.

9.    All parties hereto agree, jointly and severally, to pay on demand, as well
      as to indemnify and hold you harmless form and against all costs, damages,
      judgments, attorney's fees, expenses, obligations and liabilities of any
      kind or nature which, in good faith, you may incur or sustain in
      connection with this escrow, whether arising before or subsequent to the
      close of this escrow, except to the extent caused by the negligence or
      willful misconduct of the escrow holder.

10.   Unless the Agreement otherwise provides or unless otherwise instructed by
      either Buyer or Seller, you are authorized to furnish copies of these
      instructions, any supplements or amendments thereto, notices of
      cancellation and closing statements to the attorneys, real estate
      broker(s) and lender(s), if any, named in this escrow.

11.   These instructions may be executed in counterparts, each of which so
      executed, shall irrespective of the date of its execution and delivery be
      deemed an original, and said counterparts together shall constitute one
      and the same instrument.

12.   These instructions shall become effective as an escrow only upon the
      delivery thereof to the escrow holder signed by all parties thereto.

13.   Any funds abandoned or remaining unclaimed, after good faith efforts have
      been made by the escrow holder to return same to the party(ies) entitled
      thereto, shall be assessed a holding fee of $50.00 annually.  After seven
      (7) years the amount thereafter remaining unclaimed may escheat to the
      State of California.

                                       2
<PAGE>
 
14.   All documents, closing statements, and balances due the parties to this
      escrow are to be mailed by ordinary mail to said parties at the addresses
      shown opposite their signatures, unless otherwise instructed.

15.   Notwithstanding the foregoing, if escrow holder is also acting as Title
      Company under this Agreement, nothing set forth in these General Escrow
      Provisions shall limit any liability set forth in the Title Policy
      provided in the Agreement.

16.   For purposes of complying with Internal Revenue Code Section 6045(e), as
      amended effective January 1, 1991, escrow holder is hereby designated as
      the "person responsible for closing the transaction" and also as the
      "reporting person," for purposes of filing any information returns with
      the Internal Revenue Service concerning this transaction, as required by
      law.

                                       3
<PAGE>
 
RECORDING REQUESTED BY AND
WHEN RECORDED MAIL TO:
___________________________
___________________________
___________________________

MAIL TAX STATEMENTS TO:
___________________________
___________________________
___________________________



                                   GRANT DEED
                                   ----------



          FOR VALUE RECEIVED, _____________________________, a
____________________________________, hereby grants to
______________________________, a __________________________ ("Grantee") that
certain real property and all improvements located thereon ("Property") situated
in the City of _____________________________, _____________________ County,
described on Exhibit "A" attached hereto and by this reference incorporated
herein.

SUBJECT TO:

          (a)  A lien not yet delinquent for real property taxes against the
Property.

          (b)  The following liens, encumbrances, easements, rights of way,
covenants, conditions and restrictions of record:  [List all items as shown on
the final approved Title Report.]

          IN WITNESS WHEREOF, the undersigned has executed this Grant Deed as of
___________________, 199_.

                              ______________________________,
                              a ____________________________



                              By: ___________________________
                              Name:__________________________
                              Its: __________________________

Escrow No:_____                   Exhibit "D"                    Title No.:_____
                             to Purchase Agreement
                             ---------------------
<PAGE>
 
STATE OF CALIFORNIA    )
                       ) ss.
COUNTY OF ____________ )



          On ____________________, 199_, before me, ________________________,
Notary Public, personally appeared ____________________________________,
personally known to me (or proved to me on the basis of satisfactory evidence)
to be the person(s) whose name(s) is/are subscribed to the within instrument and
acknowledged to me that he/she/they executed the same in his/her/their
authorized capacities, and that by his/her/their authorized signature(s) on the
instrument the person(s), or the entity on behalf of which the person(s) acted,
executed the instrument.

          WITNESS my hand and official seal.



                              ____________________________
                              Notary Public

Escrow No:_____                   Exhibit "D"                    Title No.:_____
                             to Purchase Agreement
                             ---------------------
<PAGE>
 
                             SEPARATE STATEMENT OF
                           DOCUMENTARY TRANSFER TAX
                           ------------------------


County Recorder
_____________ County

Dear Sir:

          In accordance with California Revenue and Taxation Code Section 11932,
it is requested that this Statement of Documentary Transfer Tax due not be
recorded with the attached deed, but be affixed to the deed after recordation
and before return as directed on the deed.

          The deed names ___________________________________, a
__________________________ corporation, as Grantor, and
__________________________________, a ______________________,  as Grantee.  The
improvements being transferred are located in the County of ___________________,
State of California.

          The amount of the documentary transfer tax due on the attached deed is
_______________________________________ Dollars ($______________), computed on
the full value of the improvements less encumbrances of record.

                              Very truly yours,

                              ______________________________,
                              a ____________________________



                              By: __________________________
                              Name: ________________________
                                  Its: _____________________

Escrow No:_____                   Exhibit "D"                    Title No.:_____
                             to Purchase Agreement
                             ---------------------
<PAGE>
 
WHEN RECORDED RETURN TO:
Latham & Watkins
650 Town Center Drive
Twentieth Floor
Costa Mesa, California 92626-1918
Attention:  Bruce Tester

- -----------------------------------------
            (Space above this line for County Recorder's use only)


                             ASSIGNMENT OF LEASES
                             --------------------


          THIS ASSIGNMENT OF LEASES ("Assignment") is dated as of
________________________, 19___, and is entered into by and between
______________________________________________, a __________________________
corporation ("Assignor"), and _______________________________
___________________________, a ______________________________ ("Assignee"), with
reference to the following:

                               R E C I T A L S:
                               - - - - - - - - 

          A.  Assignor and Assignee have entered into that certain Agreement of
Purchase and Sale and Joint Escrow Instructions ("Agreement") dated
_____________, 19__, providing for the purchase by Assignee from Assignor of
certain real property and improvements and personal property located thereon
(collectively, the "Property") described in the Agreement. All capitalized terms
not otherwise defined herein shall have the same meanings given to them in the
Agreement.

          B.  Assignor is the landlord under certain leases [described on
Schedule "1" hereto] (herein, the "Leases") which Assignor has agreed to assign
- ------------                                                                   
to Assignee upon its purchase of the Property.

          C.  This Assignment is executed in order to effectuate as of the
Closing Date the transfer to Assignee of all of Assignor's rights, title and
interest in and to the Leases pursuant to the provisions of the Agreement.

          NOW, THEREFORE, in consideration of the foregoing recitals and for
other good and valuable consideration, the receipt and sufficiency of which is
hereby acknowledged, the parties agree as follows:

          1.  Assignment.  As of the Closing Date, Assignor hereby assigns,
              ----------                                                   
conveys, transfers and sets over unto Assignee, its successors and assigns, free
and clear any and all right, title and interest of Assignor, as landlord or
otherwise, in and to the Leases for the remaining

                                  Exhibit "E"                    
                             to Purchase Agreement
                             ---------------------
<PAGE>
 
term and all extensions thereof and to the rents set forth in the Leases,
together with any and all rights and appurtenances thereto in any way belonging
to Assignor, its successors and assigns. Assignor hereby warrants and defends
unto Assignee, its successors and assigns, all such rights, title and interest
in the foregoing documents against every person whosoever lawfully claiming all
or any part thereof, subject to Assignee's covenants contained herein and all
conditions contained in the foregoing documents to be performed and observed by
Assignee.

          2.  Acceptance and Assumption.  Assignee hereby accepts and agrees to
              -------------------------                                        
perform all of the terms, covenants and conditions of the Leases on the part of
the landlord therein required to be performed from and after the Close of
Escrow, as defined in the Agreement (but not prior thereto, which shall remain
the obligation and responsibility of Assignor), including, but not limited to,
the obligation to repay in accordance with the terms of each Lease to the tenant
thereunder any security or other deposits.

          3.  Indemnification by Assignee.  Assignee shall indemnify, defend and
              ---------------------------                                       
hold Assignor harmless from and against any and all claims, costs, demands,
losses, damages, liabilities, lawsuits, actions and other proceedings in law or
in equity or otherwise, judgments, awards and expenses of every kind and nature
whatsoever, including, without limitation, attorneys' fees (collectively
"Liabilities"), arising out of or relating to, directly or indirectly, in whole
or in part, the Leases, occurring from and after the Close of Escrow.

          4.  Indemnification by Assignor.  Assignor shall indemnify, defend and
              ---------------------------                                       
hold Assignee harmless from and against any and all Liabilities arising out of
or relating to, directly or indirectly, in whole or in part, the Leases,
occurring prior to the Close of Escrow.

          5.  Pre-Closing Rent and Operating Expenses.  Any rents or operating
              ---------------------------------------                         
expenses received by Assignor or Assignee after the Close of Escrow with respect
to the Leases shall belong to and be paid over to Assignee, unless all current
rents attributable to any period commencing on or after the Closing Date have
been paid to Assignee, in which case all amounts attributable to periods
preceding the Close of Escrow shall belong and be paid to Assignor.

          6.  Miscellaneous.  Assignor and Assignee each agrees to execute such
              -------------                                                    
other documents and perform such other acts as may be necessary or desirable to
effectuate this Assignment. If either party brings any action or suit against
the other arising from or interpreting this Agreement, the prevailing party in
such action or suit shall, in addition to such other relief as may be granted,
be entitled to recover its costs of suit and actual attorneys' fees, whether or
not the same proceeds to final judgment. This Assignment shall be governed by
and construed in accordance with the laws of the State of California, and shall
be binding upon and inure to the benefit of Assignor and Assignee and their
respective successors and assigns. This Assignment may be executed in multiple
counterparts, all of which shall be but one and the same instrument, binding on
all parties when all separately executed copies have been fully delivered.

                                  Exhibit "E"                    
                             to Purchase Agreement
                             ---------------------
<PAGE>
 
          IN WITNESS WHEREOF, the undersigned have executed this Assignment as
of the date and year first above written.

          "ASSIGNOR":        _______________________________________,
                             a _____________________________________



                             By:
                                 -----------------------------------
                             Name:
                                   ---------------------------------
                             Title:
                                   ---------------------------------



                             By:
                                 -----------------------------------
                             Name:
                                   ---------------------------------
                             Title:
                                   ---------------------------------



          "ASSIGNEE":        _______________________________________,
                             a _____________________________________


                             By:
                                 -----------------------------------
                             Name:
                                   ---------------------------------
                             Title:
                                   ---------------------------------


                             By:
                                 -----------------------------------
                             Name:
                                   ---------------------------------
                             Title:
                                   ---------------------------------

                                       3
<PAGE>
 
                              [SCHEDULE OF LEASES
                               ------------------



                          [To be provided by Seller]




                                 Schedule "1"
                            To Assignment of Leases]
                            -----------------------
<PAGE>
 
                              GENERAL ASSIGNMENT
                              ------------------


          THIS GENERAL ASSIGNMENT ("Assignment") is executed as of
___________________________, 19___, by and between __________________________,
a _________________ corporation ("Assignor"), and ______________________________
___________________________________________________________, a
_______________________________________ ("Assignee"), with reference to the
following:

                               R E C I T A L S:
                               - - - - - - - - 

          A.  Assignor as of even date herewith conveyed to Assignee the real
property, improvements and personal property located thereon (herein,
"Property") more particularly described in and pursuant to that certain
Agreement of Purchase and Sale and Joint Escrow Instructions (the "Agreement")
dated _______________, 19___, by and between Assignor as "Seller," and Assignee,
as "Buyer." All capitalized terms not otherwise defined herein shall have the
same meaning given to them in the Agreement.

          B.  In connection with the conveyance of the Property, Assignor and
Assignee intend that all of Assignor's right, title and interest in and under
any and all plans, specifications, maps, licenses, permits, guaranties,
warranties, certificates, contracts, agreements and other instruments listed on
Schedule "1" or otherwise pertaining in any way to the Property or stated 
- ------------                                          
herein, including but not limited to such of the foregoing as are listed on
Schedule "1" hereto and such contracts and agreements as are set forth on 
- ------------                                                    
Schedule "2" hereto (collectively, the "Plans, Permits and Contracts") shall be 
- ------------                                                          
conveyed to Assignee as of the Closing.

          NOW, THEREFORE, in consideration of the foregoing recitals and for
other good and valuable consideration, the receipt and sufficiency of which is
hereby acknowledged, the parties hereto agree as follows:

          1.  Warranties and Guaranties.  Effective as of the Closing Date, 
              -------------------------               
Assignor hereby assigns, sets over, conveys and transfers to Assignee, free and
clear, any and all of Assignor's right, title and interest in and to all
guaranties, warranties, certificates, contracts and agreements from any
contractors, subcontractors, vendors or suppliers regarding their performance,
quality of workmanship and quality of materials supplied in connection with the
construction, manufacture, development, installation and operation of any and
all personal property, fixtures and improvements located on the Property.

          2.  Governmental Approvals and Certificates.  To the extent
              ---------------------------------------                
permissible by law, Assignor hereby assigns, sets over, conveys and transfers to
Assignee, free and clear, any and all of Assignor's right, title and interest in
and under any zoning, use, occupancy and operating permits, and all other
permits, licenses, approvals and certificates obtained in connection with the
Property, including but not limited to such of the foregoing as are specifically
set forth on Schedule "2" hereto.
             ------------        

                                  Exhibit "F"
                             to Purchase Agreement
                             ---------------------
<PAGE>
 
          3.  Plans and Specifications.  Assignor hereby assigns, sets over, 
              ------------------------           
conveys and transfers to Assignee, free and clear, any and all of Assignor's
right, title and interest in and to all maps, plans, specifications and related
documents prepared in connection with the development, construction and
operation of any and all improvements located on the Property.

          4.  Contracts.  Assignor hereby assigns, sets over, conveys and 
              ---------                           
transfers to Assignee, free and clear, all of Assignee's right, title and
interest, if any, in and to all contracts pertaining to the use, maintenance,
servicing or repair of the Property, including but not limited to such of the
foregoing as are set forth specifically on Schedule "2" hereto.
                                           ------------        

          5.  Acceptance. Assignee hereby accepts the foregoing assignments and 
              ----------                              
agrees to assume and keep, perform and fulfill all of the terms, covenants,
conditions, duties and obligations which are required to be kept, performed and
fulfilled by the Assignor under the Plans, Permits and Contracts.

          6.  Indemnification by Assignor. Assignor shall indemnify, defend and 
              ---------------------------           
hold Assignee harmless from and against any and all claims, costs, demands,
losses, damages, liabilities, lawsuits, actions and other proceedings in law or
in equity or otherwise, judgments, awards and expenses of every kind and nature
whatsoever, including, without limitation, attorneys' fees (collectively,
"Liabilities") arising out of or relating to, directly or indirectly, in whole
or in part, the Plans, Permits and Contracts occurring prior to the Close of
Escrow, as defined in the Agreement.

          7.  Indemnification by Assignee.  Assignee shall indemnify, defend 
              ---------------------------           
and hold Assignor harmless from and against any and all Liabilities arising out
of or relating to, directly or indirectly, in whole or in part, the Plans,
Permits and Contracts occurring from and after the Close of Escrow.

          8.  Miscellaneous.  Assignor and Assignee each agrees to execute such 
              -------------                        
other documents and perform such other acts as may be necessary or desirable to
effectuate this Assignment. In the event of any action or suit by either party
hereto against the other arising from or interpreting this Agreement, the
prevailing party in such action or suit shall, in addition to such other relief
as may be granted, be entitled to recover its costs of suit and actual
attorneys' fees, whether or not the same proceeds to final judgment. This
Assignment shall be governed by and construed in accordance with the laws of the
State of California, and shall be binding upon and inure to the benefit of
Assignor and Assignee and their respective successors and assigns. This
Assignment may be executed in multiple counterparts, all of which when duly
delivered taken together, shall be binding on all parties.

                                       2
<PAGE>
 
          IN WITNESS WHEREOF, the undersigned have executed this Assignment as
of the date first above written.

          "ASSIGNOR":        _______________________________________,
                             a _____________________________________



                             By:
                                 -----------------------------------
                             Name:
                                   ---------------------------------
                             Title:
                                   ---------------------------------



                             By:
                                 -----------------------------------
                             Name:
                                   ---------------------------------
                             Title:
                                   ---------------------------------



          "ASSIGNEE":        _______________________________________,
                             a _____________________________________


                             By:
                                 -----------------------------------
                             Name:
                                   ---------------------------------
                             Title:
                                   ---------------------------------


                             By:
                                 -----------------------------------
                             Name:
                                   ---------------------------------
                             Title:
                                   ---------------------------------

                                       3
<PAGE>
 
                     LIST OF APPLICABLE PLANS AND PERMITS
                     ------------------------------------



                          [To be provided by Seller]



                                 Schedule "1"
                             To General Assignment
                             ---------------------
<PAGE>
 
                             SCHEDULE OF CONTRACTS
                             ---------------------
<TABLE> 
<CAPTION> 

Name of     Type of    Contract     Amendment      Date of      Monthly     How/When 
Vendor      Service     Date        Date(s)       Expiration    Charges     Cancelled              
- -------     -------    --------     ---------     ----------    -------     ---------                
<C>         <C>        <C>          <C>           <C>           <C>         <C> 

</TABLE> 


                                 Schedule "2"
                             To General Assignment
                             ---------------------
<PAGE>
 
                                 BILL OF SALE
                                 ------------
                              (Personal Property)

          FOR GOOD AND VALUABLE CONSIDERATION, the receipt of which is hereby
acknowledged, ____________________________, a California _____________
("Seller"), does hereby sell, transfer, and convey to _________________________,
a ___________________ ("Buyer"), all right, title and interest in and to the
following personal property which Seller warrants to be free and clear of all
other claims, rights, interests or encumbrances, to-wit:

          The personal property being conveyed hereby is itemized on Schedule 1
                                                                     ----------
          attached hereto and incorporated herein by this reference.

          Seller does hereby covenant with and warrant to Buyer that the Seller
is the lawful owner of such personal property, and that the Seller has good
title and right to sell the same as provided for herein, and will warrant and
defend the title thereto unto Buyer, its successors and assigns, against the
claims and demands of all persons whosoever.

          DATED as of _______________, 199_.

                                                                      ,
                              ----------------------------------------
                              a California
                                           ---------------------------


                              By:
                                  ------------------------------------
                              Name:                                   ,
                                    ----------------------------------
                                   its general partner



                              By:
                                  ------------------------------------
                              Name:                                   ,
                                    ----------------------------------
                              Title:
                                    ----------------------------------

                                  Exhibit "G"
                             to Purchase Agreement
                             ---------------------
<PAGE>
 
                        INVENTORY OF PERSONAL PROPERTY

                                  Schedule 1
                                  ----------


                                 Schedule "1"
                                to Bill of Sale
                                ---------------
<PAGE>
 
                            RENT ROLL:  LEASES FOR

                             WESTLAKE PLAZA CENTER

<TABLE>
<CAPTION>
 
                                                   Current                 Rent 
           Tenant     Lease    Term       Term     Monthly      CAM        Paid      Security   Prepaid      Rent        Other
Suite #     Name      Date    Starts    Expires     Rent      Charges      Thru      Deposit     Rent     Arrearage    Defaults
- -------    ------     ----    ------    -------     ----      -------      ----      -------     ----     ---------    --------
<S>         <C>       <C>     <C>       <C>         <C>       <C>          <C>       <C>         <C>      <C>          <C> 
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
</TABLE>

                                   RENT ROLL
                                  EXHIBIT "H"
<PAGE>
 
                         TENANT'S ESTOPPEL CERTIFICATE
                         -----------------------------


TO:       ___________________________________
("Buyer") ___________________________________
          ___________________________________

FROM:     _____________________________________
"Lessee") _____________________________________
          _____________________________________

RE:       Space Lease dated ____________________, 19__ (the "Lease") between
          Lessee and ________________________________ (the "Lessor"), covering
          the following space (the "Premises") within _____________________
          located at ______________________, _________, CA (the "Property"):

          Suite # __________________.

          Lessee understands that Buyer is presently negotiating to purchase the
Property, subject to the Lease, from Lessor. Lessee hereby certifies the
following information with respect to the Lease, and agrees that Buyer, and its
successors and assigns, may rely upon the same in purchasing the Property.
[Note:  Please write "NONE" or "NA" in any blanks below which do not apply.]
- -----                                                                       

     1.   The Lease is in full force and effect, has not been modified, amended,
          extended or assigned except as specifically set forth on Schedule "1"
                                                                   ------------
          hereto, and constitutes the entire agreement between Lessor and
          Lessee. There are no other oral or side agreements or understandings
          between Lessor and Lessee respecting the Lease or the Property.

     2.   The Lease termination date is ______________, ____.  There is no oral
          or written agreement or understanding between Lessor and Lessee which
          would permit termination of the Lease prior to said termination date,
          except as provided in the Lease.

     3.   Lessee is not in default, and Lessee knows of no default of Lessor,
          under the Lease or any circumstances which will, with the passage of
          time or the giving of notice, or both, become an event of default, as
          to either Lessor or Lessee. Specifically, Lessee has neither sent nor
          received written notice of any default by Lessor or Lessee under the
          Lease, which default remains uncured. Lessee is not asserting any
          claim of default, offset or defense against the payment or calculation
          of rent or other charges or expenses payable under the Lease by the

                                  Exhibit "I"
                             to Purchase Agreement
                             ---------------------
<PAGE>
 
          Lessee, or any other claim against the Lessor under the Lease or
          regarding the Property.

     4.   The current annual basic rental is $_________________.  All basic
          rental has been paid to the end of the current month, which is
          ________________, 199_.  The next regular agreed rental adjustment
          date is _____________, 199_.

     5.   The most recent payment of percentage rent, if any, was
          $______________ made on _______________, 199_ covering the rental
          period of _______________, 199_ through ________________, 199_.  No
          such percentage rents are based upon the calculation of net profits,
          net income or the like under any ground sublease or space lease
          between Lessee and any sublessee, except as follows:____.

     6.   Lessee is current in the payment of all other rents, assessments,
          taxes, repairs, maintenance (including common area maintenance)
          charges, insurance premiums, utilities or other charges or expenses or
          reimbursements to Lessor, as required under the Lease, except as
          follows: _______________________.

     7.   To Lessee's knowledge, except as shown on Schedule "1" hereto, Lessor
                                                    ------------               
          has completed and paid for all work required of Lessor under the Lease
          and all leasing commission in connection with the lease, except as
          follows: ____________________________________________________________
          _____________________________________________________________________.
                  
     8.   Lessee has not prepaid any future rent in advance of its due date,
          except the amount of $_______________ for the rental period of
          __________________, 199_ through ______________, 199_.

     9.   Lessor is holding Lessee's security deposit in the amount of
          $___________________, no portion of which has been applied to any
          obligation except as follows: _______________________________________
          _____________________________________________________________________.

    10.   Lessee has no option to renew or extend the term of the Lease, or any
          right to purchase or otherwise acquire all or any part of the Property
          or any interest therein, and has not attempted to exercise any such
          option or right, except as follows: _________________________________
          _____________________________________________________________________.

                                  Exhibit "I"
                             to Purchase Agreement
                             ---------------------
<PAGE>
 
    11.   Lessee has not in any manner, as security or otherwise, assigned,
          pledged, encumbered or hypothecated its interest in the Lease.

          There is no sublease relating to the Premises or the Lease, except as
          follows: ____________________________________________________________
          _____________________________________________________________________.

    12.   No action or proceeding has been instituted against Lessor by Lessee
          or is presently pending in any court or governmental agency.  Lessee
          is not the subject of any bankruptcy, receivership, custodianship,
          reorganization, insolvency or other proceeding of a similar nature in
          any way related to the Land, and has not made an assignment for the
          benefit of its creditors.

    13.   No guarantor of the Lease (or, to Lessee's best knowledge, any prior
          assignor of the Lease, except as shown on Schedule "1" hereto) has
                                                    ------------            
          been released or discharged voluntarily from any obligation under or
          in connection with the Lease.

    14.   Lessee has no knowledge, and no reasonable cause to believe, that
          (except for usual and customary cleaning agents, photocopy materials
          or similar substances used in the ordinary course) there has been any
          use, generation, discharge, release, storage or production on, under
          or about the Property or any groundwater thereunder of any of the
          following:  any underground storage tanks, asbestos, PCBs, used
          formaldehyde, oils, petroleum or byproducts thereof or any other toxic
          waste, material or substance, as those or any similar terms are now or
          in the future used or defined in any state, local or federal laws,
          ordinances, regulations, orders or authorizations.

    15.   The undersigned is duly authorized to execute and deliver this
          certificate, which is valid and binding on Lessee.



Dated: ___________________, 1992       Very truly yours,

                                       ----------------------------------------

                                       By:
                                          -------------------------------------
                                       Name:
                                            -----------------------------------
                                       Title:
                                            -----------------------------------

                                  Exhibit "I"
                             to Purchase Agreement
                             ---------------------
<PAGE>
 
                               [NAME OF PROJECT]

<TABLE>
<CAPTION>

                                   All                                                 Assignor
Name of                  Lease     Amendment     All      Prior        Assignments     Released? 
Lessee       Address     Date      Dates         Date     Assignee     Assignor        (Yes/No) 
- ------       -------     -----     ---------     ----     --------     -----------     ---------
<S>          <C>         <C>       <C>           <C>      <C>          <C>             <C> 

</TABLE>


                                Schedule "1" to
                         Tenant's Estoppel Certificate
                         -----------------------------
<PAGE>
 
                         SELLER'S ESTOPPEL CERTIFICATE
                         -----------------------------


TO:    _________________________________  ("Buyer")
       _________________________________
       _________________________________
       Attention:_______________________

FROM:  _________________________________  ("Seller")
       _________________________________
       _________________________________
       Attention:_______________________


RE:    Space Lease dated ____________________, 19__, as amended (collectively,
       the "Lease") between ____________________________ as "Lessee" and Seller
       as "Lessor" or "Landlord" covering the following space (the "Premises")
       within the _____________________ located at ____________________, ______,
       CA (the "Property"):  Suite # __________.

       This Certificate is delivered in connection with Section 5.2.7 of that
certain Purchase Agreement and Escrow Instructions (the "Agreement"), dated as
of August __, 1992, between __________________, a California ____________ as
"Seller," and _______________________, a ______________________, as "Buyer,"
relating to the Property as therein described.  All words and terms which are
not otherwise defined herein shall have the same meanings given to them under
said Purchases Agreement.

       With respect to the Lease described above as to which the Lessee
thereunder has failed to provide an Estoppel Certificate containing all
information in the form set forth on Exhibit "I" attached to the Purchase
                                     -----------                         
Agreement, and except as otherwise set forth in the Rent Roll, Seller hereby
represents and warrants to Buyer that as of the date last set forth below:

  1.   The Lease is in full force and effect, has not been modified, amended,
       extended or to Seller's knowledge assigned except as specifically set
       forth on Schedule "1" hereto, and constitutes the entire agreement
                ------------                                             
       between Seller and Lessee.  There are no other oral or side agreements or
       understandings between Seller and Lessee respecting the Lease or the
       Property.

  2.   The Lease termination date is _________________, ____.  There is no oral
       or written agreement or understanding between Seller and Lessee which
       would permit termination of the Lease prior to such termination date,
       except as may be otherwise provided in the Lease.

                                  Exhibit "J"
                             to Purchase Agreement
                             ---------------------
<PAGE>
 
  3.   Seller is not in default, and Seller knows of no default by Lessee, under
       the Lease, and does not know of any existing circumstances which will,
       with the passage of time or the giving of notice, or both, become an
       event of default under the Lease as to either Seller or Lessee.
       Specifically, Seller has neither sent nor received written notice of any
       default by Seller or Lessee under the Lease, which default remains
       uncured. Lessee has not delivered written notice to Seller of any claim
       of default, offset, concession, abatement, defense or other basis for
       relief or adjustment against the payment or calculation of rent or other
       charges or expenses payable under the Lease by the Lessee, or the
       performance of any other obligations under the Lease.

  4.   The current annual basic rental is $_________________. All basic rental
       has been paid to the end of the current month, which is ________________,
       199_, and no other future basic rental has been prepaid in advance of its
       due date, except the amount of $_______________ for the rental period of
       _____________, 199_ through _____________, 199_. The next regular agreed
       rental adjustment date is _____________, 199_.

  5.   The most recent payment of percentage rent, if any, was $______________
       made on _______________, 199_ with respect to the rental period of
       _______________, 199_ through ________________, 199_.  No such percentage
       rents are based upon the calculation of net profits, net income or the
       like under any ground sublease or space lease between Lessee and any
       sublessee, except as follows: __________________________________________
       ________________________________________________________________________.

  6.   To Seller's knowledge, Lessee is current in the payment of all other
       rents, assessments, taxes, repairs, maintenance (including common area
       maintenance) charges, insurance premiums, utilities or other charges or
       expenses or reimbursements to Seller, as required under the Lease, except
       as follows: _______________________.

  7.   Except as shown on Schedule "1"  hereto, Lessor has completed and paid
                          ------------                                      
       for all tenant improvement work required of Seller under the Lease and
       all leasing commissions in connection with the Lease, except as follows:
       ________________________________________________________________________.

  8.   Lessee has no option to renew or extend the term of the Lease, or any
       right to purchase or otherwise acquire all or any part of the Property or
       any interest therein, and has not attempted to exercise any such option
       or right, except as follows: ___________________________________________
       ________________________________________________________________________.

                                  Exhibit "J"
                             to Purchase Agreement
                             ---------------------
<PAGE>
 
  9.   No action or proceeding has been instituted against Seller by Lessee and
       is presently pending in any court or governmental agency.  To Seller's
       best knowledge, Lessee is not the subject of any bankruptcy,
       receivership, custodianship, reorganization, insolvency or other
       proceeding of a similar nature in any way related to the Premises, and
       has not made an assignment for the benefit of its creditors.

  10.  There is no security deposit under the Lease other than as set forth on
       the Rent Roll, and none has been applied to any obligation of Lessee.

  11.  Neither the Lease nor any rents or other payments thereunder have been
       assigned, pledged, encumbered or hypothecated by Seller, as security or
       otherwise, except for such assignment, pledge or encumbrance as will be
       satisfied and released at the Closing.

  12.  No guarantor of the Lease (or, to Seller's best knowledge, any prior
       assignee of the Lease, except as shown on Schedule "1" hereto) has been
                                                 ------------                 
       released or discharged voluntarily from any obligation under or in
       connection with the Lease.

  13.  Seller has no knowledge, and no reasonable cause to believe, that (except
       for usual and customary cleaning agents, photocopy materials or similar
       substances used in the ordinary course) there has been any unlawful use,
       generation, discharge, release, storage or production on, under or about
       the Property or any groundwater thereunder of any of the following:  any
       underground storage tanks, asbestos, PCBs, used formaldehyde, oils,
       petroleum or byproducts thereof or any other toxic waste, material or
       substance, as those or any similar terms are now or in the future used or
       defined in any state, local or federal laws, ordinances, regulations,
       orders or authorizations (herein, "Laws").  No liens have been or are
       imposed upon the Property under any such Laws, and Lessee has not
       released any other person or entity from any liability for any such
       environmental matters.

  14.  The Lease is fully assignable by Lessor without the necessity of
       obtaining consent from any Lessee or other third party.

                                  Exhibit "J"
                             to Purchase Agreement
                             ---------------------
<PAGE>
 
  15.  The undersigned is duly authorized to execute and deliver this
       certificate, which is valid and binding on Seller.



Dated: ___________________, 1992       Very truly yours,

                                       ______________________________,
                                       a California _________________

                                       By:
                                             ------------------------
                                       Name:
                                             ------------------------
                                       Title:
                                             ------------------------ 

                                       By:
                                             ------------------------
                                       Name:
                                             ------------------------
                                       Title:
                                             ------------------------



                                  Exhibit "J"
                             to Purchase Agreement
                             ---------------------
<PAGE>
 
                                  Exhibit "K"

                            (Intentionally Omitted)

<PAGE>
 
                                                                   EXHIBIT 10.22

                FIRST AMENDMENT TO PURCHASE AND SALE AGREEMENT
                         AND JOINT ESCROW INSTRUCTIONS

This First Amendment to Purchase and Sale Agreement and Joint Escrow 
Instructions ("Amendment") is entered into effective as of October 2, 1996 by 
Westlake Plaza Partners, a California limited partnership ("Seller") and Kilroy 
Industries, a California corporation ("Buyer").

                                   RECITALS

      A.  Effective as of June 6, 1996 Seller and Buyer entered into a Purchase 
and Sale Agreement and Joint Escrow Instructions (the "Agreement").

      B.  By letter agreement dated July 17, 1996 (the "Letter Agreement") the
parties extended the Contingency Period to July 24, 1996 and reduced the Deposit
from Two Hundred Fifty Thousand Dollars ($250,000) to Fifty Thousand Dollars
($50,000).

      C.  By this Amendment the parties desire to extend the Contingency Period 
and amend the Agreement as hereinafter described.

      D.  All initially capitalized terms shall have the meaning set forth in 
the Agreement.

      E.  Notwithstanding the fact that the Agreement and Letter Agreement, 
taken together, provide for automatic termination on July 24, 1996, the parties 
elected to forego the automatic termination provision as it applied to the July 
24, 1996 date only.  Said provision shall remain in full force and effect as to 
the date set forth in this Amendment.

                                   AGREEMENT

    1. Extension of Contingency Period. The Contingency Period, which was July
       -------------------------------
3, 1996 under the Agreement, and was extended to July 24, 1996 by the Letter
Agreement, is hereby extended to October 11, 1996. In no event shall there be
any further extensions of the Contingency Period.

    2.  Deposit Increase.  Upon execution of this Amendment, Buyer shall deliver
        ----------------
to Escrow Holder Fifty Thousand Dollars ($50,000), which will increase the
Deposit from Fifty Thousand Dollars ($50,000) to One Hundred Thousand Dollars
($100,000).

    3.  Additional Deposit.  If Buyer elects to go forward towards Closing, on 
        ------------------
October 11, 1996, Buyer shall deliver to Escrow Holder written notice
affirmatively approving the transaction as a whole and One Hundred Fifty
Thousand Dollars ($150,000) which will increase the Deposit to Two Hundred Fifty
Thousand Dollars ($250,000). The Deposit shall thereafter be non-refundable and
shall belong to Seller if Escrow does not close for any reason other than (a)
Seller's default, or (b) the failure to occur of a Closing condition for Buyer's
benefit as set forth in Sections 4.7, 5.2.7, 5.4, Sections 7.1 through 7.3.14,
Section 8.4 and Section 8.5, subject

                                       1





     
<PAGE>
 
to the amendment of Section 4.7 and the substitute representations and 
warranties of Section 7.3.8, both as set forth below.  If, on October 11, 1996, 
Buyer fails to deliver the written notice affirmatively approving the 
transaction as a whole or fails to increase the Deposit by One Hundred Fifty 
Thousand Dollars ($150,000), the Escrow and the Agreement shall be automatically
terminated without the need of any further action by either party hereto and, 
all funds deposited by Buyer shall be refunded to Buyer.  Buyer shall have no 
further rights or interest with respect to the Agreement, the Letter Agreement 
or the Property.

     4.  Closing. The Closing shall be extended to December 13, 1996.
         -------

     5.  Early Closing.  Notwithstanding any other provision of the Agreement
         -------------
or this Amendment, Buyer may elect at any time to close the acquisition of the 
Property by giving ten (10) business days' prior written notice to Seller.

     6.  Credit.  At Closing, Seller shall credit Buyer $70,000 towards the 
         ------
Purchase Price.  If Buyer is able to negotiate a written reduction in the 
brokerage commission, the aforementioned credit shall be increased accordingly.

     7.  Escrow Holdback Assignment.  At Closing, Seller will assign to Buyer 
         --------------------------
all of its right, title and interest in and to that certain Escrow Holdback 
Agreement dated November 3, 1994 by and between Seller, Westlake Village 
Associates, and First American Title Insurance Company, as modified by that 
certain letter dated May 5, 1995 from Seller to First American Title Insurance 
Company and Resolution Trust Corporation.  Seller makes no representations or 
warranties to Buyer regarding Buyer's ability to have the holdback funds 
disbursed as provided for in the Escrow Holdback Agreement and Buyer's ability 
to have the holdback funds so disbursed shall not be a condition to Closing.

     8.  Amendment of Section 4.7.  Section 4.7 of the Agreement is deleted in 
         ------------------------
its entirety and replaced with the following:

         "Condition of Improvements.  As of the Closing Date, the Improvements 
          -------------------------
shall be in good operating condition (subject to normal wear and tear) and 
Seller shall not have received written notice from any governmental entity that 
the use and operation of the Improvements is not in full compliance with all 
applicable environmental and other Laws."

     9.  Substitute Representations and Warranties of Section 7.3.8 as a 
         ---------------------------------------------------------------
condition to Close of Escrow.  The representation and warranty in Section 7.3.8 
- ----------------------------
shall continue to survive as a representation and warranty made by Seller upon
the execution and delivery of the Agreement, but the continued truth and 
accuracy of Section 7.3.8 shall not constitute a condition to the Close of 
Escrow for the benefit of the Buyer.  However, the truth and accuracy of the 
following substitute representation and warranty shall constitute a condition to
the Close of Escrow for the benefit of Buyer:

         "Leases.  In respect of each of the Leases, except as provided in the 
          ------
      Rent Roll approved by Buyer and provided in Section 4.4 above, the 
      following

                                       2
<PAGE>
 
     information is true and correct: (i) each of the Leases is in full force
     and effect according to the terms set forth therein and in the Rent Roll
     and has not been further modified, amended, extended or assigned by Seller,
     in writing or otherwise, and each Tenant under the Leases is legally
     required to pay all sums and perform all obligations set forth in the
     Leases; (ii) all obligations of the Seller, as landlord, under the Leases
     which have accrued prior to Closing will be performed by Closing; and (iii)
     Seller has not applied and shall not apply any security deposit from a
     Tenant to rent or any other obligation due from any Tenant without Buyer's
     prior written consent."

     10.  Effect on Agreement.  Except to the extent modified by this Amendment 
          -------------------
and the Letter Agreement, the Agreement shall remain in full force and effect.  
This Amendment also constitutes an amendment to the instructions to Escrow 
Holder.  In the event that any provision of this Amendment contradicts or is 
inconsistent with any provision of the Agreement or the Letter Agreement, then 
the provisions of this Amendment shall prevail.

IN WITNESS WHEREOF, the undersigned have executed this Amendment effective as of
the date set forth above.

                                       SELLER:

                                       WESTLAKE PLAZA PARTNERS,
                                       a California limited partnership 

                                       By: Pacifica Real Estate Group,
                                           a California corporation,
                                           a General Partner

                                           By: /s/ David A. Brown
                                              ------------------------------
                                              Name David A. Brown
                                                  --------------------------
                                              Title Executive Vice President
                                                    ------------------------

                                      BUYER:

                                      KILROY INDUSTRIES,
                                      a California corporation

                                      By: /s/ Jeffrey C. Hawken
                                         ----------------------------
                                         Name Jeffrey C. Hawken
                                             ------------------------
                                         Title Senior Vice President,
                                               Asset Management
                                              ----------------------- 


                                     3   
  

<PAGE>
 
                                                                   EXHIBIT 10.23

                       DEVELOPMENT MANAGEMENT AGREEMENT


     THIS DEVELOPMENT MANAGEMENT AGREEMENT ("Agreement") is made and entered 
into as of November 1, 1995, by and between the REDEVELOPMENT AGENCY OF THE CITY
OF RIVERSIDE ("Agency") and KILROY TECHNOLOGY COMPANY, a California Corporation 
("Development Manager"). 

                                   RECITALS

     A. Agency, Development Manager and the County of Riverside ("County") 
entered into that certain Exclusive Right to Negotiate and Reimbursement 
Agreement dated January 11, 1994, as amended by that certain First Amendment to 
Exclusive Right to Negotiate and Reimbursement Agreement dated February 14, 
1995, that certain Second Amendment dated June 20, 1995 and that certain Third 
Amendment dated August 15, 1995 (which Agreement and Amendments are hereinafter,
collectively the "ERN") with respect to the planning, development and leasing of
a United States Bankruptcy Court (Central District of California) (the 
"Project") to the United States General Services Administration (the "GSA") as 
part of the planned Justice Center of the Inland Empire.

     B. The Redevelopment Plan for the Project Area was approved and adopted by 
the Riverside City Council by Ordinance No. 3872 on November 16, 1971, and 
amended by Ordinance No. 3980, Ordinance No. 4108, Ordinance No. 4246 and 
Ordinance 5238.

     C. The land on which the Project is to be developed is owned by the County 
and has been, or shall be leased to Agency pursuant to the terms of that certain
Ground Lease (the "Ground Lease") which has been, or as a condition to the 
effect of this Agreement shall be, entered into between the County and Agency.

     D. In furtherance of the Project, Agency has entered into that certain 
United States General Services Administration Lease GS-09B-93834, as amended 
(the "GSA Lease").

     E. Under the provisions of the ERN, Development Manager has caused the 
premises which are to be the subject of the GSA Lease (the "Facility") to be 
designed on a schematic basis as described in the GSA Lease and as further 
developed and described in those drawings and specifications listed in Exhibit A
                                                                       ---------
(the "Design Documents") which have been prepared by Langdon Wilson (the 
"Architect").

     F. In order to continue the efforts necessary to complete the preparation 
of drawings, specifications, invitations to bidders and contracts for 
construction of the Facility (collectively, "Construction Documents") and to 
arrange for financing in order to meet the terms of the GSA Lease, Agency 
desires that Development Manager continue its

                                       1
<PAGE>
 
efforts under the ERN, but under the terms of, as more fully set forth in, this 
Agreement.

     NOW, THEREFORE, in consideration of the foregoing recitals and for other
good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties agree as follows:

                                   AGREEMENT
                                   ---------

                                   Article 1
                        DEVELOPMENT MANAGER'S SERVICES
                        ------------------------------
            
     1.1 GSA Lease. The parties acknowledge that under the terms of the ERN,
         ---------
Development Manager has prepared a comprehensive Project development proposal
for the GSA and assisted Agency in negotiating with the GSA leading to the award
and execution of the GSA Lease. Development Manager shall continue to assist
Agency in negotiations with the GSA regarding amendment of the GSA Lease as
necessary in order to secure financing for the Project, including the
preparation and negotiation on behalf of Agency of Supplemental Lease
Amendments.
     
     1.2 Architecture and Engineering. The parties acknowledge that Development
         ----------------------------
Manager has retained Langdon Wilson as the Architect with Agency's consent and
has proceeded to direct the preparation of the Design Documents by the Architect
and to coordinate the efforts of the Architect with the requirements of the GSA
and Agency and construction cost information provided by Development Manager's 
construction manager. Dinwiddie Construction Company (the "Construction 
Manager"). Development Manager shall continue to provide such services with 
respect to the preparation of the Construction Documents. Development Manager 
shall schedule and coordinate periodic meetings as required to accomplish the 
foregoing and shall expedite requests for information and responses thereto. 
Development Manager shall coordinate the application for and issuance of all 
requisite building permits.

     1.3 Budgeting and Cost Estimating. Development Manager shall prepare and 
         -----------------------------
periodically update estimates of total development costs to complete 
construction of the Project suitable for occupancy under the GSA Lease. The goal
of Development Manager shall be to coordinate the actions of the Architect, the 
Construction Manager and Agency so that the total development costs will be paid
from the proceeds of financing obtained by Agency which is repaid by the 
revenues from the GSA Lease.

     1.4 Progress Schedule. Development Manager shall prepare and periodically 
         -----------------
(at least monthly) update a schedule reflecting the progress of construction and
showing the major tasks to be accomplished in order to complete construction of 
the Project, financing and occupancy under the GSA Lease. The progress schedule
shall utilize information provided by Agency, the Construction Manager and the

                                       2


<PAGE>
 
Architect. The progress schedule shall be updated periodically to reflect the 
actual progress of the Project.

     1.5 Long-Lead Time Items. Under the terms of the ERN Development Manager 
         -------------------- 
has engaged Construction Manager to provide construction management services and
to place orders with the trade contractors listed below (selected as the lowest 
cost responsible providers) for the design and fabrication of the long-lead time
items listed below in order that Project completion will occur within the time 
required under the GSA Lease:
       
     Gayle Manufacturing          Structural Steel
     Montgomery                   Elevators
     SASCo                        Electrical
     Graycon                      HVAC
     Carco                        Plumbing
     Garvin                       Fire Protection

Development Manager has authorized Construction Manager to enter into agreements
("Trade Contracts") with such Trade Contractors either directly or in the name 
of Development Manager. As a result of the change in the role of Development 
Manager from that of turn-key design/builder as contemplated in the ERN, 
Development Manager shall assign all such Trade Contracts to Agency, and Agency 
shall accept such assignments, pursuant to separate Assignments of Long 
Lead-Time Obligations for Construction Materials and Work pursuant to which 
Development Manager shall be released by the applicable Trade Contractors.

     1.6 Construction Phase Services. Construction phase services commence with 
         ---------------------------
the award of the Trade Contracts and, together with Development Manager's 
obligations to provide basic services under this Agreement, shall end 30 days 
following substantial completion of the work under all of the Trade Contracts, 
but not later than December 31, 1996. During the construction phase, Development
Manager shall provide the following services:

          (a) All labor, materials, supplies and equipment necessary for 
construction of the Facility shall be provided under agreements (the "Trade 
Contracts") between Agency and the lowest responsive, responsible bidders (the 
"Trade Contractors"). Development Manager shall coordinate with Construction 
Manager to advertise for competitive bids for all construction work pursuant to 
the Public Contract Code and all applicable Agency procedures. Development 
Manager shall coordinate the efforts of the Architect and the Construction 
Manager in the creation of bid documents and the forms of contracts to be used 
with Trade Contractors, using forms provided by Agency or by Development Manager
and subject to Agency's approval.
          
           (b) In accordance with a schedule established by Development 
Manager, Agency shall open bids and with Development Manager's assistance, shall
review the apparent low bid for conformance

                                       3
<PAGE>
 
with the Construction Documents and legal requirements, including the forms of 
payments and performance bonds and evidence of insurance provided by the 
apparent low bidder. As soon as possible (with a goal of five to ten business 
days) following Construction Manager's report to Agency of the apparent lowest 
responsible, responsive bidder, Agency shall award and enter into the individual
Trade Contracts.  At Development Manager's request, Agency shall consider 
rejecting all bids for a portion of the construction work if the apparent low 
bid is significantly in excess of the amount which Development Manager has 
budgeted for such portion.

          (c) Development Manager shall arrange for its Construction Manager to 
provide administration of Trade Contracts as required to coordinate the work for
Trade Contractors with each other and with the activities of the Architect. 
Development Manager shall establish and implement coordination and communication
procedures among Development Manager, Agency, the Architect and the Trade 
Contractors.

          (d) Development Manager shall coordinate, schedule and attend weekly 
Project site meetings with Construction Manager, Trade Contractors, the 
Architect and Agency and shall cause preparation and distribution of minutes of 
such meetings.

          (e) Development Manager shall establish and implement procedures for 
reviewing and processing requests for clarifications and interpretations of the 
Construction Documents, shop drawings, samples and other submittals, 
construction schedule adjustment requests, change order proposals, proposals for
substitutions, payment applications and the maintenance of logs documenting 
Project site activities, production of documents, distribution for review and 
response and the status of such reviews. As Agency's representative at the
Project site, Development Manager shall be the party to which all such
information shall be submitted.

          (f) Development Manager shall coordinate review by the Architect and 
the Construction Manager of Trade Contractors' requests for information, shop 
drawings, samples and other submittals to determine compliance with the 
requirements of the Construction Documents. Notwithstanding the foregoing,
Development Manager shall not be responsible for any actions, errors or
omissions of the Architect, the Construction Manager or any failure of the labor
or materials provided by the Trade Contractors to comply with the requirements
of the Construction Documents, for other breaches of the Construction Documents
by the Trade Contractors, for other defective work of the Trade Contractors, or
for any loss, cost, damage or claims arising out of the actions or omissions of
the Trade Contractors, or any of them.

          (g) Development Manager shall coordinate with the Construction Manager
to establish and implement a change order control system.  All changes to a 
Trade Contract shall only be by change orders executed by Agency.  Development 
Manager shall cause all changes

                                       4
<PAGE>
 
initiated by Agency first to be described in documents prepared by the Architect
and issued to the applicable Trade Contractor(s).  Development Manager shall 
review all Trade Contractors' proposals with applicable Trade Contractors, the 
Architect, the Construction Manager and Agency and endeavor to determine and 
evaluate for Agency the Trade Contractors' basis for the price and time 
extensions requested to perform the work involved with a change.  At Agency's 
request, and in coordination with the Architect and the Construction Manager, 
Development Manager shall coordinate issuance to the applicable Trade Contractor
of appropriate change order documents or change directives.

     1.7  Construction Quality.
          --------------------

          (a)  Development Manager shall monitor and coordinate the 
activities of the Architect and the Construction Manager in determining in 
general that the work of each Trade Contractor is being performed in accordance 
with the requirements of the Construction Documents in order to determine in 
general if the construction work is being performed in a manner indicating that,
upon completion, the Facility will be in accordance with the Construction 
Documents.

          (b)  Development Manager shall not have control over or charge 
of, and shall not be responsible for construction means, methods, techniques, 
sequences or procedures, or for safety precautions and programs in connection 
with the work of the Trade Contractors as such responsibilities shall be those 
of the Trade Contractors.  Development Manager shall not have control over or 
charge of acts or omissions of the Architect, the Construction Manager, the 
Trade Contractors or their agents or employees.  No action taken by Development 
Manager shall relieve a Trade Contractor from its obligations to perform its 
work in strict conformance with the requirements of the Construction Documents 
and all applicable laws, regulations, rules and interpretation of governmental 
authorities.

     1.8  Substantial and Final Completion.  Development Manager shall
          --------------------------------
coordinate the efforts of the Architect and the Construction Manager in 
determining when the Facility and each Trade Contractor's work has reached 
substantial completion and shall coordinate the preparation of a list of 
incomplete work and work which does not conform to the requirements of the 
Construction Documents.  Following the Architect's issuance of a certificate of 
substantial completion for the Project, Development Manager shall evaluate the 
status of completion of the work of each Trade Contractor and make 
recommendations to Agency concerning readiness for final inspections.  
Development Manager shall assist Construction Manager in obtaining and 
delivering to Agency or the GSA, if Agency so directs, required guarantees, 
releases, bonds and waivers, together with all keys, manuals, record drawings 
and maintenance stocks of materials.

                                       5


<PAGE>
 
     1.9  Cost Management:
          ---------------

          (a) Development Manager shall, with the participation of Construction
Manger and each Trade Contractor, determine a schedule of values for each Trade
Contract. The schedule of values shall be the basis for evaluating a Trade
Contractor's applications for payment against the progress of construction of
such Trade Contractor.

          (b)  Agency shall require that copies of all claims of Trade 
Contractors for additional compensation or extensions of time for their 
performance be given to Development Manager.  Development Manger shall advise 
Agency concerning Development Manager's opinion of the merit of Trade 
Contractor's claims for additional time or compensation made during the 
Construction Phase as well as the effect on the Project budget of all proposed 
and approved change orders.

          (c)  In instances where a lump sum or unit price is not determined 
prior to Agency's authorization to a Trade Contractor to perform change work, 
Development Manager shall assist Construction Manager in reviewing records of 
each Trade Contractor of the costs of materials and equipment and payrolls and 
the amount of payments to each subcontractor, incurred by such Trade Contractor 
in performing the work related to such change.

          (d)  Development Manager shall coordinate with the Architect and the 
Construction Manager in reviewing progress payment applications submitted by 
each Trade Contractor, review the progress of construction and making a good 
faith determination whether the amount requested reflects the progress of the 
Trade Contractor's work.  Development Manager shall make appropriate adjustments
to each payment application and shall prepare and forward to Agency a progress 
payment report which shall state the total of all Trade Contract sums, payments 
to date, current payments requested, retainage and actual amounts owed for the 
current period.

     1.10  Project Closeout.
           ----------------

          (a)  Development Manager and the Construction Manager shall coordinate
and expedite submittal of information from the Trade Contractors to the 
Architect for preparation of any required record drawings and specifications.

          (b)  Prior to final completion of the Project, Development Manager and
the Construction Manager shall arrange for the assembly of all manufacturers' 
operations and maintenance manuals, warranties and certificates, and shall 
deliver such documents to Agency.

          (c)  Development Manager shall arrange to coordinate with the 
Construction Manager and with the GSA's maintenance personnel to observe the 
Trade Contractors' startup, testing and operation of Project systems as required
under the Construction Documents.

                                       6
<PAGE>
 
          (d) Development Manager shall coordinate with the Construction Manager
to arrange for training of Agency's operating engineers in the proper operation 
and maintenance of Project systems. Training sessions shall be scheduled 
following consultation with Agency, but it shall be Agency's responsibility to 
select personnel to be trained and to assure such personnel attend scheduled 
training.

          (e) Development Manager shall coordinate the activities of the
Architect and the Construction Manager in creating a substantial completion
punch list and shall advise Agency concerning the completion of punch list
items.

     1.11 Additional Services. Any services which may be required to be 
          -------------------
provided by Development Manager in addition to the basic services described
above, including, for example, assisting Agency in the prosecution of claims
against insurers, Trade Contractors or others, or assisting Agency in the
defense of any such claims, shall be considered additional services and shall
only be provided by Development Manager upon mutual agreement with Agency.

                                   Article 2
                           AGENCY'S RESPONSIBILITIES
                           -------------------------

     2.1  Delivery of Information and Approvals.
          -------------------------------------

          (a) To the extent not otherwise set forth in the GSA Lease, Agency 
shall provide Development Manager with full information regarding the 
requirements of the Project, including any Redevelopment Project area 
requirements.

          (b) Agency shall arrange for and obtain all land use entitlements and 
similar permits and shall obtain all easements and other property rights which 
may be required for development of the Project.

          (c) Agency shall respond to all requests for information or approval 
by Development Manager within three business days of Development Manager's 
request. Such time period shall also apply to all requests for approval which do
not require action by Agency's Board. Agency shall otherwise arrange to provide 
property rights, land use entitlements, approvals of other governmental entities
and funds as necessary for completion of the Project, all in accordance with the
Project schedule prepared by Development Manager, unless disapproved by Agency 
within five business days following delivery to Agency.

     2.2  Agency's Representative. Agency has designated its Executive Director 
          -----------------------
as its representative with authority to bind Agency in all matters except those 
would entail an amendment of this Agreement.

                                       7


<PAGE>
 
     2.3  Form of Trade Contracts. Agency shall use its best efforts to enter 
          -----------------------
into any Trade Contracts with respect to the Project on forms previously 
approved by Development Manager with respect to insurance and indemnification 
provisions.

                                   Article 3
                      COMPENSATION OF DEVELOPMENT MANAGER
                      -----------------------------------

     3.1  Compensation for Basic Services
          -------------------------------

          (a) As compensation for its services under this Agreement, Agency 
shall pay to Development Manager a fee of $716,978.46, less certain amounts paid
under the ERN through October 31, 1995, payable in equal monthly installments of
$14,428.10 until paid in full.

          (b) If completion of the Project, as evidenced by the issuance of a 
certificate of completion by the Architect, occurs on or before four hundred and
thirty (430) days following Agency Board award of the first publicly bided Trade
Contracts for this Agreement, as such date may be extended by delays not under
Development Manager's control, then Development Manager shall be paid an early
completion bonus of $3,333 per day, but not to exceed $100,000, for each day
that such completion so precedes the end of such construction period, as such
date may be so extended. At Development Manager's request Agency shall pay for
acceleration of Project construction to the extent Agency reasonably determines
that amounts so expended for acceleration are likely to result in commensurate
savings in the costs of the Project to Agency or a commensurate increase in the
revenues to Agency generated by the Project.

     3.2  Reimbursements Payable to Development Manager.
          ---------------------------------------------

          (a) On a monthly basis Agency shall reimburse Development Manager or, 
at Development Manager's request or Agency's option, pay directly to third 
parties on behalf of Development Manager, costs and expenses incurred by 
Development Manager in connection with the project for the services and items 
listed in Exhibit B. The total amount payable by Agency for such services and 
          ---------
items shall not exceed the total amount shown in Exhibit B without Agency's 
                                                 ---------
prior consent, except to the extent any increase in the cost to Development
Manager of any such services or items which does not result from any cause under
Development Manager's reasonable control. Causes not under the Development
Manager's reasonable control shall include, without limitation, the actions or
omissions of Architect and/or Construction Manager.

          (b) Agency shall reimburse Development Manager for the costs of the 
reimbursable items listed below as incurred by Development Manager in connection
with its services in assisting the Agency to obtain the award of the GSA Lease. 
Such reimbursement, less a 20% retention, shall be paid to Development Manager 
30 days after Agency

                                       8

<PAGE>
 
receives the proceeds from revenue bonds sold intended to be repaid from the GSA
Lease rents and such payment shall be conditioned upon Agency's receipt and 
verification of contracts or other evidence of obligation and evidence of 
payment by Development Manager.  The amount of the reimbursement to Development 
Manager previously retained shall be paid to Development Manager within 45 days 
following substantial completion of the Project.

<TABLE> 
<CAPTION> 
        Reimbursable Item                          Amount
        -----------------                          ------
        <S>                                        <C> 
        architects/engineers                       $ 23,521.92
        master planning                              10,000.00
        entitlements                                 14,595.00
        financing plan                                7,382.76
        legal                                         4,505.00
        deposit to Agency                             5,000.00
        project management                           88,550.00
                                                   -----------

        Total                                      $153,554.68
                                                   ===========
</TABLE> 

          (c)  Agency shall use its best efforts to maximize the amount of 
proceeds available from the sale of bonds secured by the Project.

          (d)  Reimbursements otherwise due to Development Manager but not 
including amounts due from Development Manager to Architect or Construction 
Manager, may be withheld by Agency to the extent necessary for Agency to recover
damages finally adjudicated to be due to Agency as a result of a material
default by Development Manager under this Agreement. Any of such reimbursements
which are determined wrongfully to have been withheld shall bear interest at the
highest rate permitted by law, but not to exceed 12% per annum, from the date
due until paid in full.

     3.3  Progress Payments.  All amounts payable hereunder on a monthly basis 
          -----------------
shall be payable on the first day of each month, commencing November 1, 1995, 
provided that Development Manager shall have delivered its application for 
payment of such amounts to Agency on or before five business days preceding such
date.

     3.4  Compensation for Additional Services.  Development Manager shall be 
          ------------------------------------
entitled to an increase in its fee as compensation for additional services 
requested by Agency or required if Development Manager has not been able to 
complete its services under this Agreement by December 31, 1996 due to delays 
resulting from events not under Development Manager's reasonable control on the 
basis of reimbursing Development Manager for additional costs incurred in 
connection with such additional services.  Included in the costs of additional 
services for which Development Manager shall be entitled to reimbursement shall 
be the following:

                                       9
<PAGE>
 
      .1  costs of reimbursable items as listed in Exhibit B;
                                                   ---------
      .2  the product of (a) 2.4 multiplied by (b) costs of labor, including 
          insurance and benefits, whether field or home office, and including
          direct employees and consultants;
      .3  costs of materials, supplies and equipment, including transportation, 
          rental costs of machinery and equipment; and
      .4  premiums for bonds and insurance, permits, fees, sales, use or similar
          taxes, related to the additional services.

     3.5  Development Manager's Accounting.
          --------------------------------

          (a)  Records of costs payable on a reimbursable basis and costs for 
additional services payable on a reimbursable basis shall be kept on the basis
of generally accepted accounting principles and shall be available to Agency or
Agency's authorized representative at mutually convenient times.

          (b)  Development Manager shall keep such full and detailed accounts 
and records of contracts, work or purchase orders, fees and expenses payable 
directly by Agency to Trade Contractors or to Development Manager on a 
reimbursable basis as may be necessary for proper financial management under 
this Agreement, and the system shall be satisfactory to Agency.  Agency shall be
afforded access to and the right to copy and audit all Development Manager's 
records, books, correspondence, data relating to such fees and expenses and 
Development Manager shall preserve all such records for a period of three (3) 
years or for such longer period as may be required by law after final payment 
hereunder.


                                   Article 4
                                STANDARD TERMS
                                --------------

     4.1  Damages.
          -------

          (a)  If Development Manager or Agency defaults with regard to any of 
the provisions of this Agreement, the non-defaulting party shall serve written 
notice of such default upon the defaulting party.  As of the date of this 
Agreement, neither party is in default under this Agreement.

          (b)  Notwithstanding anything in this Agreement to the contrary, 
Development Manager shall not be liable to Agency, and Agency hereby waives all 
claims, suits and demands against and releases Development Manager from damages,
losses, expenses and claims for injury, death and property damage arising out of
or in connection with the acts or omissions of the Architect, the Construction 
Manager and the Trade Contractors, and its and their employees, consultants and 
subcontractors.  The foregoing waiver and release is given in recognition that 
Agency will be in direct contract with Trade

                                      10

<PAGE>
 
Contractors, and that the Architect and the Construction Manager are aware that 
Agency is the intended third-party beneficiary of their services. Nothing in the
foregoing shall be deemed to release Development Manager from claims, suits or
demands by Agency arising out of Development Manager's negligence or misconduct.

     4.2 Indemnity.
         ---------

          (a) Development Manager is skilled in the professional calling 
necessary to perform the services and duties agreed to be performed under this 
Agreement, and Agency, not being skilled in such matters, relies upon the skill 
and knowledge of Development Manager to perform said services and duties in the 
most professional manner. Therefore, Development Manager agrees to indemnify, 
hold harmless and defend Agency, City Council and each member thereof, and every
officer and employee of Agency, from any and all liability or financial loss  
resulting from any suits, claims, losses or actions brought by any entity, 
person or persons and from all costs and expenses of litigation brought against 
Agency, Agency Board, and each member hereof, or any officer, employee, or agent
of Agency, by reason of injury to any person or persons, including, but not 
limited to officers and employees of Agency and City, or damage, destruction, or
loss of tangible property of any kind whatsoever, including, but not limited to,
that of Development Manager, resulting directly or indirectly from any or all 
wrongful or negligent activities and operations of Development Manager or any of
its employees in the performance of this Agreement.

          (b) Agency agrees to indemnify, hold harmless and defend Development 
Manager and every officer and employee of Development Manager, from any and all 
liability or financial loss resulting from any suits, claims, losses, or actions
brought by any entity, person or persons and from all costs and expenses of 
litigation brought against Development Manager and each or any officer,
employee, or agent of Development Manager, or damage, destruction, or loss of
property of any kind whatsoever, including but not limited to that of
Development Manager, resulting directly or indirectly from any or all wrongful
or negligent activities and operations of Agency or any person or entity
employed by Agency in the performance of this Agreement or in the provision of
labor, materials, supplies and equipment for construction of Facility.

     4.3 Insurance.
         ---------

          (a) Prior to the commencement of construction on the Property, 
Development Manager shall furnish or cause to be furnished to Agency duplicate 
originals or appropriate certificates of (1) bodily injury and property damage 
insurance policies with limits of $1,000,000 per occurrence, $2,000,000 in the 
aggregate, business auto liability insurance with limits of $1,000,000 each 
occurrence and excess or umbrella liability insurance with limits of 
$10,000,000; together with workers' compensation and employers' liability 
insurance as required by 

                                      11
<PAGE>
 
law and otherwise with a $1,000,000 policy limit and errors and omissions 
insurance with a limit of $1,000,000, naming the County, Agency and the City as 
additional insureds.  Development Manager shall also furnish or caused to be 
furnished to Agency evidence satisfactory to Agency that any contractor with 
whom it has contracted for the performance of work on the Project carries 
workers' compensation insurance as required by law.  The obligations set forth 
in this Section shall remain in effect until a Certificate of Completion has
been issued by Agency, and said policies shall provide that they shall not be
canceled or reduced in coverage or amounts without giving Agency at least thirty
(30) days prior written notice. The policy amounts set forth above shall not
limit or define the extent of Development Manager's indemnity liability pursuant
to (i) this Section 4.3, (ii) any other provision of this Agreement, or 
(iii) arising as a matter of law or at equity.

          (b)  Development Manager shall furnish Agency with certificates of 
insurance evidencing all such coverages and certificates evidencing renewal 
thereof before expiration of the coverage of the policy in question.  Such 
certificate shall be provided on a form approved by Agency.  Agency may also 
request Development Manager to provide it with copies of the actual policies for
its review.  In the event Development Manager fails to provide any certificate 
when due evidencing coverage required to be maintained by Development Manager, 
Agency may, but shall not be required to, obtain such coverage and deduct any 
costs in connection therewith from any sums due Development Manager from Agency 
or seek reimbursement for same from Development Manager, which sum shall be due 
and payable immediately on receipt by Development Manager of notice from Agency.
In the event Agency has to initiate legal action for recovery of same, 
Development Manager shall pay all costs and reasonable attorneys' fees in 
connection therewith provided however, such judgment is in favor of Agency.

          (c)  The following statement shall appear in each certificate of 
insurance provided Agency by Development Manager hereunder:  "It is agreed that 
in the event of any material change in or cancellation of this policy, thirty 
(30) days prior written notice will be given to:

                          Redevelopment Agency of the
                               City of Riverside
                          3737 Main Street, Suite 800
                          Riverside, California 92501
                          Attn:  Executive Director
                          Re:  U.S. Bankruptcy Court"

          (d)  Development Manager and Agency shall give prompt written notice 
to the other party of all losses, damages, or injuries to any person or to 
property of Agency, Development Manager or of third persons of which that party 
becomes aware and which may be in any way related to the Project or for which a 
claim might be made against either

                                      12
<PAGE>
 
party.  Development Manager and Agency shall promptly report to the other party 
all such claims of which either party has noticed, whether related to matters 
insured or uninsured.  No settlement or payment for any claim for loss, injury 
or damage or other matter as to which any party may be charged shall be made 
without the prior written approval of such party.

          (e)  The insurance provided by Development Manager shall be primary to
any coverage available to Agency, except for claims which involve Contractors 
that are directly contracted with Agency.  In those instances, the Contractor's 
insurance shall be primary.  The insurance policies shall name Agency as an 
additional insured and shall include provisions for waiver of subrogation.

     4.4  No Discrimination.
          -----------------

          (a)  Development Manager for itself and its successors and assigns 
agrees that in the performance of its services related to the Project; 
Development Manager will not discriminate against any employee or applicant for 
employment because of sex, marital status, race, color, religion, creed, 
national origin, or ancestry, and that Development Manager will comply with all 
applicable local, state and federal fair employment laws and regulations.

          (b)  All contracts relative to the improvements constructed as part of
the Project shall contain or be subject to substantially the following 
nondiscrimination or non-segregation clauses, pursuant to Section 33436 of the 
California Health and Safety Code:

          In deeds:  "The grantee herein covenants by and for himself, his 
          --------
heirs, executors, administrators, and assigns, and all persons claiming under or
through them, that there shall be no discrimination against or segregation of, 
any person or group of persons on account of race, color, creed, religion, sex, 
marital status, national origin or ancestry in the sale, lease, sublease, 
transfer, use, occupancy, tenure or enjoyment of the land herein conveyed, nor 
shall the grantee himself or any person claiming under or through him, establish
or permit any such practice or practices of discrimination or segregation with 
reference to the selection, location, number, use or occupancy of tenants, 
lessees, subtenants, sublessees or vendees in the land herein conveyed.  The 
foregoing covenants shall run with the land in perpetuity."

          In leases:  "The lessee herein covenants by and for himself, his 
          ---------
heirs, executors, administrators and assigns, and all persons claiming under or 
through him, and this lease is made and accepted upon the subject to the 
following conditions:  That there shall be no discrimination against or 
segregation of any person or group of persons, on account of race, color, creed,
religion, sex, marital status, national origin or ancestry, in the leasing, 
subleasing,

                                      13

<PAGE>
 
transferring, use, occupancy, tenure or enjoyment of the land herein leased, 
nor shall the lessee himself, or any person claiming under or through him, 
establish or permit any such practice or practices of discrimination or 
segregation with reference to the selection, location, number, use or occupancy 
of tenants, lessees, subtenants, sublessees or vendees of the land herein 
leased."

     In contracts: "There shall be no discrimination against or segregation of, 
     ------------
any person or group of persons on account of race, color, creed, religion, sex, 
marital status, national origin, or ancestry in the sale, lease, sublease, 
transfer, use, occupancy, tenure or enjoyment of the land, nor shall the 
transferee himself or any person claiming under or through him establish or 
permit any such practice or practices of discrimination or segregation with 
reference to the selection, location, number, use, or occupancy of tenants, 
lessees, subtenants, sublessees or vendees of the land."

     4.5 Notices and Demands. All notices or other communications required or 
         -------------------
permitted hereunder shall be in writing, and may be personally delivered or sent
by United States registered or certified mail, postage prepaid, return receipt 
requested, addressed to parties at the addresses provided below, subject to the 
right of either party to designate a different address for itself by notice 
similarly given. Any notice so given by registered or certified United States
mail shall be deemed to have been given on the second business day after the
same is deposited in the United States mail. Any notice not so given by
registered or certified mail shall be deemed given upon receipt of the same by
the party to whom the notice is given.
 
     To Agency:                Redevelopment Agency of the 
                               City of Riverside
                               3737 Main Street, Ste. 800
                               Riverside, CA  92501
                               Attention: Executive Director
                               Phone: (909) 715-3500
                               Fax:   (909) 715-3503

     With a copy to:           City Attorney
                               City of Riverside
                               3900 Main Street
                               Riverside, CA  92501
                               Phone: (909) 782-5567
                               Fax:   (909) 782-5540

     To Development Manager:   Kilroy Technology Company
                               2250 E. Imperial Highway
                               El Segundo, CA  90245
                               Attention: C. Hugh Greenup
                               Phone: (213) 772-1193
                               Fax:   (310) 322-5781

                                      14 
<PAGE>
 
     With a copy to:          Kilroy Technology Company
                              24150 Parkway Calabasas
                              Calabasas, CA  91302
                              Attention:  Allan J. O'Connor
                              Phone:      (818) 591-9441
                              Fax:        (818) 591-9070

     4.6  Non-liability of Agency or City Officials and Employees.  No member,
          -------------------------------------------------------
official or employee of the City of Riverside or Agency shall be personally 
liable to Development Manager, or any successor in interest in the event of any 
default or breach by Agency or for any amount which may become due to 
Development Manager or to its successor, or on any obligations arising under 
this Agreement.

     4.7  Extension of Times of Performance and Delays.  In addition to specific
          --------------------------------------------
provisions of this Agreement, neither party hereunder shall be deemed to be in 
default where delays or defaults are due to war; insurrection; strikes; 
lock-outs; riots; floods; earthquakes; fires; casualties; acts of God; acts of 
the public enemy; epidemics; quarantine restrictions; and freight embargoes.

     4.8  Project Suspension or Abandonment.  Agency shall not terminate this
          ---------------------------------
Agreement except for cause as provided in this Agreement or except in connection
with Agency's good faith determination permanently to abandon the Project. If
the Project is suspended or abandoned in whole or in part through no fault of
Development Manager, Development Manager shall be compensated for all services
performed up through receipt of written notice from Agency of such suspension or
abandonment, together with reimbursable costs accrued through such date,
termination, cancellation and demobilization costs, together with (i) a
termination fee in the amount of the lessor of the amount of Development
Manager's fee remaining unpaid through the end of the period for basic services
or three monthly installments of Development Manager's fee, and (ii) payment in
full of any portion of the $153,554.68 reimbursement then unpaid under paragraph
3.2(b). If the Project is resumed within two years following suspension or
termination after being suspended for more than three months, Development
Manager's compensation shall be adjusted by agreement of the parties but shall
in no event be less than the amount of Development Manager's total fee than
remaining unpaid, and in any event upon the resumption of the Project within
such two year period, Agency shall use the services of Development Manager as
contemplated in this Agreement. Notwithstanding the foregoing, if the Project is
permanently abandoned by Agency due to its inability following its best efforts
to sell bonds or otherwise raise money in order to provide the funds to cover
Project costs, or if the Project is abandoned permanently due to the
cancellation of the GSA Lease by the GSA prior to Project completion, then no
termination fee shall be payable, and in the event of termination due to an
inability to sell bonds, no payments for reimbursable expenditures incurred by
Development Manager following Agency's notice to Development Manager that it is
abandoning the Project shall be payable.

                                      15

<PAGE>
 
     4.9  Legal Action.
          ------------

          (a)  If either party brings any action or proceeding against the other
arising out of this Agreement, then as between Development Manager and Agency, 
the prevailing party shall be entitled to recover as an element of its costs of 
suit, and not as damages, its reasonable attorney's fees as fixed by the court 
in such action or proceeding or in a separate action or proceeding brought to 
recover such attorney's fees.

          (b)  In addition to any other rights or remedies, either party may 
institute legal action to cure, correct, or remedy any default, to recover 
damages for any default, or to obtain any other remedy consistent with the 
purpose of this Agreement.  Such legal actions must be instituted and maintained
in the Superior Court of the County of Riverside, State of California, in any 
other appropriate court in that County, or in the Federal District Court in the 
Central District of California.

          (c)  The laws of the State of California shall govern the 
interpretation and enforcement of this Agreement.

          (d)  Except with respect to rights and remedies expressly declared to 
be exclusive in this Agreement, the rights and remedies of the parties are 
cumulative and the exercise by either party of one or more of such rights or 
remedies shall not preclude the exercise by it, at the same or different times 
of any other rights or remedies for the same default or any other default by the
other party.

     4.10  Real Estate Commissions.  Agency shall not be liable for any real 
           -----------------------
estate commission, brokerage fees or finders fees which may arise from this 
Agreement.  Agency and Development Manager each represent and warrant to the 
other that it has engaged no broker, agent, or finder in connection with this 
transaction.

     4.11  Time Deadlines Critical.  Time is of the essence of this Agreement.
           -----------------------
     4.12  Submission of Documents and Other Actions for Approval.
           ------------------------------------------------------

          (a)  Except where such approval is expressly reserved to the sole 
discretion of the approving party, all approvals required hereunder by either 
party shall be not be unreasonably withheld.

          (b)  Any requests for approval of documents submitted to Agency shall 
contain the following heading in bold type on the first page of the request:

                                      16
<PAGE>
 
ATTENTION EXECUTIVE DIRECTOR

THIS IS A REQUEST FOR AGENCY OR CITY APPROVAL OF THE ATTACHED DOCUMENT. PLEASE 
REVIEW THE MATERIAL AND APPROVE OR DISAPPROVE IT IN WRITING WITHIN THE TIME 
ESTABLISHED FOR SUCH ACTION THEREFOR IN THE DEVELOPMENT MANAGEMENT AGREEMENT OR 
SCHEDULE OF PERFORMANCE.

     4.13 Amendments to This Agreement. Development Manager and Agency agree to 
          ----------------------------
mutually consider reasonable requests for amendments to this Agreement which may
be made by any of the parties hereto, lending institutions, bond counsel or 
financial consultants. Any amendments to the Agreement must be in writing and 
signed by the appropriate authorities of both Agency and Development Manager.

     4.14 Non-Material Amendments. The Executive Director is authorized to 
          -----------------------
approve and execute amendments to this Agreement which are not of a material 
nature, including, but not limited to, the granting of extensions of time to 
Development Manager.

     4.15 Counterpart Originals: Integration.
          ----------------------------------

          (a) This Agreement may be executed in duplicate originals, each of 
which is deemed to be an original. This Agreement and its Exhibits represent the
entire understanding of the parties and supersedes all negotiations or previous 
agreements between the parties with respect to all or any part of the subject 
matter hereof.

          (b) All waivers of the provisions of this Agreement must be in writing
and signed by the appropriate authorities of both Agency and Development 
Manager.

     4.16 No Waiver. Failure to insist on any one occasion upon strict 
          ---------
compliance with any of the terms, covenants or conditions hereof shall not be 
deemed a waiver of such term, covenant or condition, nor shall any waiver or 
relinquishment of any rights or powers hereunder at any one time or more times 
be deemed a waiver or relinquishment of such other right or power at any other 
time or times.

     4.17 Termination of Agreement.
          ------------------------
     
          (a) If either party should fail to comply with any material provision 
of this Agreement, the other party may inform the defaulting party by written 
notice of its intent to terminate the Agreement unless the defaulting party 
cures the default within thirty (30) calendar days or such longer period as 
reasonably may be necessary, provided that within such 30-day period the 
defaulting party commences and thereafter diligently proceeds to prosecute such 
cure. Upon the failure of the defaulting party to cure the default within said 
period the Agreement may be immediately terminated.

                                      17
<PAGE>
 
          (b) This Agreement may be terminated by Agency, pursuant to paragraph
4.8 above, upon at least thirty (30) days written notice to Development Manager.
In such event, compensation shall be payable to Development Manager in
accordance with Section 4.8.

     4.18  Successors and Assigns.  Agency and Development Manager, 
           ----------------------
respectively, bind themselves, their partners, successors, assigns and legal 
representatives to the other party to this agreement, and to the partners, 
successors, assigns and legal representatives of such other party with respect 
to all covenants to this Agreement.  Neither Agency nor Development Manager 
shall assign or transfer any interest in this Agreement without the written 
consent of the other; provided that Development Manager may assign its interest 
in the Agreement to any entity which is established to succeed to the property 
ownership, development or management activities of Kilroy Industries and/or its 
affiliates ("Kilroy"); or any other entity controlled by or under common control
with Kilroy.

     4.19  Extent of Agreement. 
           -------------------
          (a)  This Agreement represents the entire and integrated agreement 
between Agency and Development Manager and supersede all prior negotiations, 
representations or agreements between the parties, either written or oral.  This
Agreement may be amended only by written instrument signed by both Agency and 
Development Manager.

          (b)  Nothing contained herein shall be construed as creating the 
relationship of employer and employees between the parties hereto, and 
Development Manager shall be deemed at all times to be an independent contractor
with respect to its performance hereunder.

                                      18
<PAGE>
 
                                  "DEVELOPMENT MANAGER"
 
Dated: November 20, 1995          KILROY TECHNOLOGY COMPANY, a California
       -------------              corporation



                                  By: /s/ C. Hugh Greenup
                                      --------------------------
                                      C. Hugh Greenup
                                      President


                                  "AGENCY"

Dated: November 21, 1995          REDEVELOPMENT AGENCY OF THE CITY OF
       -------------              RIVERSIDE



                                  By: /s/ Robert C. Wales
                                      --------------------------
                                      Robert C. Wales, P.E.
                                      Executive Director


APPROVED AS TO FORM:
Agency Special Counsel


By: /s/ Charles S. Vose
    -------------------
    Charles S. Vose, Esq.
    Oliver, Barr & Vose

                                     19
  
<PAGE>
 
                                   EXHIBIT A
                                   ---------
                               Design Documents
<TABLE> 
<CAPTION> 
October 23, 1995

ARCHITECTURAL-CORE & SHELL                                 ISSUE DATE
- --------------------------                                 ----------
<S>           <C>                                          <C>
A-00          Cover Sheet 

A-01          Title Sheet, Sheet Index, etc.               10-09-95

A-1.10        Site Plan                                    10-09-95
A-1.11        Enlarged Site Plan / Details                 10-09-95

A-2.10        First Floor Plan                             10-09-95
A-2.11        First Floor Plan (Partial) / Roof Plan       10-09-95
A-2.12        Second Floor Plan                            10-09-95
A-2.13        Third Floor Plan                             10-09-95
A-2.14        Roof Plan                                    10-09-95

A-3.10        Exterior Elevations                          10-09-95
A-3.11        Exterior Elevations                          10-09-95
A-3.12        Partial and Enlarged Exterior Elevations     10-09-95

A-3.20        Building Sections                            10-09-95
A-3.21        Building Sections                            10-09-95
A-3.22        Wall Sections                                10-09-95
A-3.23        Wall Sections                                10-09-95
A-3.24        Enlarged Partial Bldg. Sections              10-09-95

A-3.30        Exterior Wall Details                        10-09-95
A-3.31        Exterior Wall Details                        10-09-95
A-3.32        Exterior Wall Details                        10-09-95
A-3.33        Exterior Wall Details                        10-09-95

A-3.40        Roof Details                                 10-09-95
</TABLE> 
                                   1        
<PAGE>
 
<TABLE> 
<S>                <C>                                               <C>   
A-4.10             Enlarged Core Plans (North)                       10-09-95 
A-4.11             Enlarged Core Plan (South)                        10-09-95 
A-4.12             Enlarged Core Plans (South)                       10-09-95
                                                                             
A-5.10             Stair Sections / Elevator Sections                10-09-95
A-5.11             Stairs Sections / Elevator Sections               10-09-95
A-5.12             Miscellaneous Stair / Elevator Details            10-09-95 

A-6.10             Interior Elevations                               10-09-95
A-6.11             Interior Elevations                               10-09-95

A-7.10             Material and Finish Schedules                     10-09-95
A-7.11             Door Schedule and Details                         10-09-95
A-7.12             Wall Types Schedule and Details                   10-09-95
A-7.13             Interior Details                                  10-09-95

A-8.10             Enlarged Reflected Ceiling Plan                   10-09-95
A-8.11             Enlarged Reflected Ceiling Plan                   10-09-95
A-8.12             Enlarged Reflected Ceiling Plan                   10-09-95


ARCHITECTURAL - TENANT IMPROVEMENT
- ---------------------------------

TI-2.11            Ground Floor T.I. Plan                            10-09-95
TI-2.12            Second Floor T.I. Plan                            10-09-95
TI-2.13            Third Floor T.I. Plan                             10-09-95

TI-4.11            Enlarged Plans - Ground Floor                     10-09-95
TI-4.12            Enlarged Plans - Second Floor                     10-09-95
TI-4.13            Enlarged Plans - Third Floor                      10-09-95 

TI-6.10            Interior Elevations - Ground Floor                10-09-95
TI-6.11            Interior Elevations - Second Floor                10-09-95
TI-6.12            Interior Elevations - Third Floor                 10-09-95
TI-6.13            Interior Elevations - Third Floor                 10-09-95

TI-8.11            Ground Floor Reflected Ceiling Plan               10-09-95
TI-8.12            Second Floor Reflected Ceiling Plan               10-09-95
TI-8.13            Third Floor Reflected Ceiling Plan                10-09-95
</TABLE> 

                                       2

<PAGE>
 
STRUCTURAL
- ----------
<TABLE> 
<C>                <S>                                               <C> 
S-1.1              General Notes                                     08-18-95

S-2.10             Foundation Plan                                   09-22-95
S-2.11             Foundation (Partial) Roof Plan (Partial)          09-22-95
S-2.12             Second Floor Framing Plan                         09-22-95
S-2.13             Third Floor Framing Plan                          09-22-95
S-2.14             Roof Framing Plan                                 09-22-95

S-3.1              Frame Elevations                                  09-22-95

S-4.1              Typ. Foundation Details                           07-10-95
S-4.2              Concrete Details                                  09-22-95

S-5.1              Steel Details                                     09-22-95
S-5.2              Steel Details                                     09-22-95
S-5.3              Steel Details                                     09-22-95

S-6.1              Deck Details                                      09-22-95


LANDSCAPE DWGS
- --------------

L.1                Irrigation Plan                                   08-21-95
L.2                Planting Plan                                     09-29-95
L.3                Details / Notes Irrigation and Planting           09-29-95


CIVIL DWGS
- ----------

1                  Title Sheet                                       10-06-95
2                  Grading Plan                                      10-06-95
3                  Demolition Plan                                   10-06-95
4                  County of Riverside                               10-06-95

1                  Water / Sewer Plan                                10-06-95
</TABLE> 

                                       3

<PAGE>
 
*ARCHITECTURAL SPECIFICATIONS (SEPT. 1995)
- ------------------------------------------

  D.B. Drawing is furnished by current design build subcontractors

ELECTRICAL DWGS. (9-19-95)
- --------------------------

<TABLE> 
<S>           <C>                                                     <C> 
E-0.1         Symbols and Abbreviations. Title 24                     09-19-95
E-1.1         Site Plan                                               09-19-95
E-2.11        First Floor Power Plan                                  09-19-95
E-2.12        Second Floor Power Plan                                 09-19-95
E-2.13        Third Floor Power Plan                                  09-19-95
E-2.14        Roof Plan                                               09-19-95
E-2.15        Mezzanine Plan/Roof Plan (Partial)                      09-19-95

E-3.11        First Floor Communication Plan                          09-19-95
E-3.12        Second Floor Communication Plan                         09-19-95
E-3.13        Third Floor Communication Plan                          09-19-95

E-4.11        First Floor Reflected Ceiling Plan                      09-19-95
E-4.12        Second Floor Reflected Ceiling Plan                     09-19-95
E-4.13        Third Floor Reflected Ceiling Plan                      09-19-95

E-5.10        Lighting Fixture Schedule, Details                      09-19-95
E-5.20        Details                                                 09-19-95

E-6.10        One Line Diagram, Loan Calculations                     09-19-95
</TABLE> 

MECHANICAL DWGS (9-19-95)
- -------------------------
<TABLE> 
<S>           <C>                                                    <C> 
M-1           HVAC Legend and General Notes                           09-19-95
M-2           First Floor Plan                                        09-19-95
M-3           Second Floor Plan                                       09-19-95
M-4           Third Floor Plan                                        09-19-95
M-5           Roof Plan                                               09-19-95
</TABLE> 

                                       4
<PAGE>
 
<TABLE> 
<S>           <C>                                                      <C> 
M-6           Title 24 Forms                                           09-19-95
M-7           Title 24 Forms                                           09-19-95

PLUMBING DWGS (9-22-95)
- -----------------------

P-01          Plumbing Notes Sched. & Calcs.                           09-22-95

P-1.10        Plumbing Site Plan                                       09-22-95

P-2.11        First Floor Plumbing Plan                                09-22-95
P-2.12        Second Floor Plumbing Plan                               09-22-95
P-2.13        Third Floor Plumbing Plan                                09-22-95
P-2.14        Plumbing Roof Plan                                       09-22-95

P-3.11        Gas, Hot & Cold Water Riser Diagram                      09-22-95
P-3.12        Waste & Vent Riser Diagram                               09-22-95

P-4.11        Enlarged Ground Core Plumbing Plan (South)               09-22-95
P-4.12        Enlarged 2nd/3rd Core Plumbing Plan (South)              09-22-95

FIRE PROTECTION DWGS (8-22-95)
- ------------------------------

1             Site Plan / General Notes                                08-22-95
2             First Floor Reflected Ceiling Plan                       08-22-95
3             Second Floor Reflected Ceiling Plan                      08-22-95
4             Third Floor Reflected Ceiling Plan                       08-22-95
5             First Floor Sprinkler Piping Plan                        08-22-95
6             Second Floor Sprinkler Piping Plan                       08-22-95
7             Third Floor Sprinkler Piping Plan                        08-22-95
8             Pump Mezzanine Plan / Sections                           08-22-95
</TABLE> 

Note: These are current construction documents furnished to date. These 
      documents are subject to change upon completion of drawings and 
      specifications.

                                       5
<PAGE>
 
                                   EXHIBIT B

                          RIVERSIDE BANKRUPTCY COURT

                          REIMBURSABLE ITEMS 11/1/95

 1  Legal - Leasing, Contracts, Negotiations           $100,000
 2  Gnrl Liab/Seismic/Floor (COC & DIC) Insurance      $128,160
 3  E & O Insurance                                    $125,000
 4  Architects, Engineers, Consultants               $1,085,271
 5  Renderings & Models                                 $15,000
 6  Environmental Assessments                           $40,000
 7  A-E-C Reimbursable (0.05%)                          $49,168
 8  Reproduction                                       $103,475
 9  Geotechnic Engineering                              $25,000 
10  Testing & Inspection                               $109,770
11  Survey - ALTA, Parcel Subdivision                   $15,960
12  Fees, Permits, Bus. Tax - Lic.                     $300,000
13  Photos, Pub. Relations, Event, Site Sign            $35,000
14  Estimating/Construction Management Services      $1,374,347

    Total Reimbursable  items                        $3,506,151


<PAGE>
 
                  REPORT AND CONSENT OF INDEPENDENT AUDITORS
 
                                                                   EXHIBIT 23.3
 
  We consent to the use in this Registration Statement of Kilroy Realty
Corporation on Form S-11 of our reports on Kilroy Realty Corporation, dated
October 25, 1996, Kilroy Group ("Predecessor Affiliates"), dated September 20,
1996, and the Acquisition Properties dated June 7, 1996, appearing in this
Registration Statement, and to the references to us under the captions
"Selected Combined Financial Data" and "Experts."
 
  Our audits of the financial statements referred to in our aforementioned
report also included the combined financial statement schedule of Kilroy Group
listed in Item 35. This combined financial statement schedule is the
responsibility of the management of Kilroy Group. Our responsibility is to
express an opinion based on our audits. In our opinion, such financial
statement schedule, when considered in relation to the basic financial
statements taken as a whole, presents fairly in all material respects the
information set forth therein.
 
DELOITTE & TOUCHE LLP
Los Angeles, California
November 1, 1996

<PAGE>
 
                                                                   EXHIBIT 23.4
 
                    CONSENT OF ROBERT CHARLES LESSER & CO.
 
To Kilroy Realty Corporation:
 
  As experts in real estate consulting and urban economics, we hereby consent
to the use of our Regional Economic Overview and Market Analysis dated June
28, 1996 and to all references to our firm included in or made a part of this
Registration Statement.
 
                                          ROBERT CHARLES LESSER & CO.
 
                                          /s/ Robert Charles Lesser & Co.
 
Los Angeles, California
November 5, 1996

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE COMBINED
FINANCIAL STATEMENTS OF THE KILROY GROUP AS OF JUNE 30, 1996 (UNAUDITED) AND
DECEMBER 31 1995.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   6-MOS                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1995
<PERIOD-START>                             JAN-01-1996             JAN-01-1995
<PERIOD-END>                               JUN-30-1996             DEC-31-1995
<CASH>                                               0                       0
<SECURITIES>                                         0                       0
<RECEIVABLES>                                    3,892                   3,642
<ALLOWANCES>                                     2,158                   1,793
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                                     0                       0
<PP&E>                                         193,110                 191,744
<DEPRECIATION>                                  82,790                  79,251
<TOTAL-ASSETS>                                 121,825                 121,171
<CURRENT-LIABILITIES>                           12,507                  17,443
<BONDS>                                        204,601                 206,858
                                0                       0
                                          0                       0
<COMMON>                                             0                       0
<OTHER-SE>                                    (95,283)               (103,130)
<TOTAL-LIABILITY-AND-EQUITY>                   121,825                 121,171
<SALES>                                              0                       0
<TOTAL-REVENUES>                                17,811                  38,485
<CGS>                                                0                       0
<TOTAL-COSTS>                                   18,301                  39,619
<OTHER-EXPENSES>                                     0                       0
<LOSS-PROVISION>                                   365                     958
<INTEREST-EXPENSE>                               9,422                  21,529
<INCOME-PRETAX>                                  (490)                 (1,134)
<INCOME-TAX>                                         0                       0
<INCOME-CONTINUING>                              (490)                 (1,134)
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                 12,887                  15,267
<CHANGES>                                            0                       0
<NET-INCOME>                                    12,397                  14,133
<EPS-PRIMARY>                                        0                       0
<EPS-DILUTED>                                        0                       0
        

</TABLE>


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