ARDEN REALTY INC
S-11/A, 1996-10-03
OPERATORS OF NONRESIDENTIAL BUILDINGS
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<PAGE>
   
    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON OCTOBER 3, 1996
    
                                                       REGISTRATION NO. 333-8163
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                              -------------------
   
                                AMENDMENT NO. 4
                                       TO
                                   FORM S-11
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                              -------------------
    
                               ARDEN REALTY, INC.
      (Exact Name of Registrant as Specified in its Governing Instruments)
                            ------------------------
                            9100 Wilshire Boulevard
                             East Tower, Suite 700
                        Beverly Hills, California 90212
                                 (310) 271-8600
                    (Address of principal executive offices)
                            ------------------------
 
                                Richard S. Ziman
                            9100 Wilshire Boulevard
                             East Tower, Suite 700
                        Beverly Hills, California 90212
                                 (310) 271-8600
                    (Name and Address of Agent for Service)
                            ------------------------
                                   COPIES TO:
 
          William J. Cernius                      J. Warren Gorrell, Jr.
           Latham & Watkins                      Joseph G. Connolly, Jr.
        650 Town Center Drive                     Hogan & Hartson L.L.P.
              Suite 2000                             Columbia Square
     Costa Mesa, California 92626              555 Thirteenth Street, N.W.
            (714) 540-1235                     Washington, D.C. 20004-1109
                                                      (202) 637-5600
 
                              -------------------
 
    APPROXIMATE  DATE OF COMMENCEMENT OF THE  PROPOSED SALE OF THE SECURITIES TO
THE PUBLIC: As  soon as  practicable after this  Registration Statement  becomes
effective.
 
    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>
 TITLE OF EACH CLASS OF                                   PROPOSED MAXIMUM           PROPOSED MAXIMUM
    SECURITIES TO BE             AMOUNT TO BE              OFFERING PRICE           AGGREGATE OFFERING             AMOUNT OF
       REGISTERED               REGISTERED(1)               PER SHARE(2)                 PRICE(2)               REGISTRATION FEE
<S>                        <C>                        <C>                        <C>                        <C>
Common Stock, $.01 par
  value per share.......          21,674,500                   $20.00                  $433,490,000               $149,479(3)
</TABLE>
 
(1) Includes 2,827,000 shares which the Underwriters have the option to purchase
    solely to cover overallotments, if any.
(2) Estimated solely for the purpose of calculating the registration fee.
(3) This amount was previously paid.
                            ------------------------
 
    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>
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.
<PAGE>
   
PROSPECTUS        Subject to Completion, dated October 3, 1996
    
                               18,847,500 SHARES
 
 G                             ARDEN REALTY, INC.
                                  COMMON STOCK
                                ----------------
    Arden Realty,  Inc. (the  "Company")  is a  Maryland corporation  which  was
formed  on May 1, 1996 to continue and  expand the real estate business of Arden
Realty Group, Inc.,  a California  corporation, formed  on March  22, 1991,  and
certain  affiliated entities which  are engaged in  owning, acquiring, managing,
leasing and renovating office properties in Southern California. Upon completion
of the offering  (the "Offering"),  the Company  will own  24 office  properties
containing  approximately 4.0  million rentable  square feet,  all of  which are
located in  Southern  California.  The  Company  will  be  a  fully  integrated,
self-administered and self-managed real estate company and expects to qualify as
a real estate investment trust ("REIT") for federal income tax purposes.
    All of the shares of the Company's common stock (the "Common Stock") offered
hereby  are being sold by the Company and will represent approximately 86.69% of
all outstanding shares of the Company's Common Stock (or interests  exchangeable
for Common Stock). The remaining approximately 13.31% of the equity will be held
by   officers  and  directors   of  the  Company   and  certain  other  parties,
substantially all of which is in the form of limited partnership interests  ("OP
Units") of Arden Realty Limited Partnership, a Maryland limited partnership (the
"Operating  Partnership").  To  assist  the Company  in  complying  with certain
qualification requirements applicable to  REITs, the Company's charter  provides
that  no  stockholder  or  group  of  affiliated  stockholders  may  actually or
constructively own more than  9.0% of the outstanding  Common Stock, subject  to
certain specified exceptions. See "Capital Stock -- Restrictions on Transfer."
    Prior to the Offering, there has been no public market for the Common Stock.
It is currently estimated that the initial public offering price will be between
$19.00  and $21.00 per share. See "Underwriting" for information relating to the
factors to be considered in determining  the initial public offering price.  The
Common  Stock has  been approved  for listing  on the  New York  Stock Exchange,
subject to official notice of issuance, under the symbol "ARI."
   
    SEE "RISK FACTORS" BEGINNING ON PAGE  17 FOR CERTAIN FACTORS RELEVANT TO  AN
INVESTMENT IN THE COMMON STOCK, INCLUDING:
    
   
- - The  possibility that the consideration paid by the Company for the Properties
  and other assets contributed to the Company in its formation may exceed  their
  fair  market value;  no third-party  appraisals were  obtained by  the Company
  regarding these Properties and other assets;
    
   
- - The possibility that the Company may not be able to refinance outstanding debt
  (initially expected  to be  approximately $104  million) upon  maturity,  that
  indebtedness  might be refinanced  on less favorable  terms, and that interest
  rates might increase  on variable rate  indebtedness (including amounts  drawn
  under  the Company's proposed  $100 million credit facility);  and the lack of
  limitations in  the  Company's  organizational  documents  on  the  amount  of
  indebtedness which the Company may incur;
    
   
- -Risk  that the  Company will  not have  sufficient cash  available to  make its
 expected  distributions  for  the  12  months  following  the  offering,  which
 represent approximately 98.0% of estimated cash available for distributions;
    
   
- - Real estate investment and property management risks such as the need to renew
  leases  or relet space  upon lease expirations, the  instability of cash flows
  and changes in  the value of  office properties  owned by the  Company due  to
  economic and other conditions;
    
   
- - Concentration  of the  Properties in  Southern California  which increases the
  risk of the  Company being adversely  affected by a  downturn in the  Southern
  California economy or office markets;
    
   
- - Conflicts  of interest  in connection  with the  transactions relating  to the
  formation of the Company  and material benefits to  officers and directors  of
  the  Company, including receipt of an  aggregate of approximately 2,740,718 OP
  Units and stock  options to  purchase an aggregate  of 868,500  shares of  the
  Common  Stock,  special allocations  of  interest deductions  of approximately
  $12.6 million and repayment of approximately $398 million of indebtedness;
    
   
- - The lack of operating  history of the Properties  under the management of  the
  Company;  the majority of  the Properties have  been owned by  the Company for
  less than one year;
    
   
- - The possibility that the Board of Directors  of the Company may in the  future
  amend  or  revise  the  investment,  financing,  borrowing,  distribution  and
  conflicts of interest policies of the Company, without a vote of the Company's
  stockholders;
    
   
- - Taxation of the Company as a regular  corporation if it fails to qualify as  a
  REIT,  taxation of the Operating  Partnership as a corporation  if it fails to
  qualify as a  partnership and  the resulting  decrease in  cash available  for
  distribution; and
    
   
- - Risks that certain types of losses, such as from earthquakes, could exceed the
  Company's  insurance coverage which currently includes earthquake coverage for
  all of the Properties.
    
 
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>
                                                      Price to           Underwriting Discounts         Proceeds to
                                                       Public             and 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, as
    amended. See "Underwriting."
(2) Before deducting estimated expenses of $6,224,750 payable by the Company.
(3) The Company has granted the Underwriters  a 30-day option to purchase up  to
    2,827,000 additional shares of Common Stock on the same terms and conditions
    as set forth above solely to cover overallotments, if any. If such option is
    exercised  in full,  the total Price  to Public,  Underwriting Discounts and
    Commissions and Proceeds to  Company will be $            , $            and
    $         , respectively. See "Underwriting."
                          ---------------------------
 
    The  shares of Common  Stock offered by  this Prospectus are  offered by the
Underwriters subject to prior sale, to withdrawal, cancellation or  modification
of  the offer without notice, to delivery  to and acceptance by the Underwriters
and to certain further  conditions. It is expected  that delivery of the  shares
will  be made at the offices  of Lehman Brothers Inc., New  York, New York on or
about            , 1996.
                          ---------------------------
LEHMAN BROTHERS
 
            ALEX.BROWN & SONS
                  INCORPORATED
 
                         DEAN WITTER REYNOLDS INC.
                                         A.G. EDWARDS & SONS, INC.
 
                                                               SMITH BARNEY INC.
 
EVEREN SECURITIES, INC.  LEGG MASON WOOD WALKER RAYMOND JAMES & ASSOCIATES, INC.
                               INCORPORATED
 
           , 1996
<PAGE>
    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.
 
    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.
 
                                [Graphics--To Come]
<PAGE>
                               TABLE OF CONTENTS
   
<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
PROSPECTUS SUMMARY........................................................    1
  The Company.............................................................    1
  Risk Factors............................................................    2
  Business and Growth Strategies..........................................    4
  The Properties..........................................................    6
  Structure and Formation of the Company..................................    8
  Financing Policies......................................................   12
  Mortgage Financing, CMBS Offering and Credit Facility...................   12
  The Offering............................................................   13
  Distributions...........................................................   13
  Tax Status of the Company...............................................   13
  Summary Selected Combined Financial Data................................   14
 
RISK FACTORS..............................................................   17
  Price to be Paid for Properties and Other Assets May Exceed Their Fair
   Market Value...........................................................   17
  Formation Transactions Not Arm's Length.................................   17
  Risk of High Distribution Payout Percentage.............................   17
  Real Estate Financing Risks.............................................   17
  No Limitation on Debt...................................................   18
  Real Estate Investment Risks............................................   18
  Concentration of Properties in Southern California......................   20
  Conflicts of Interests in the Formation Transactions and the Business of
   the Company............................................................   20
  Risk Associated with the Recent Acquisition of Many of the New
   Properties; Lack of Operating History..................................   22
  Potential Risks Regarding Change-of-Control Consents on Ground Leases...   22
  Changes in Policies Without Stockholder Approval........................   22
  Risk of Acquisition, Renovation and Development Activities..............   22
  Adverse Consequences of Failure to Qualify as a REIT; Other Tax
   Liabilities............................................................   23
  Failure of the Operating Partnership to Qualify as a Partnership for
   Federal Income Tax Purposes............................................   24
  Insurance...............................................................   24
  Dependence on Key Personnel.............................................   24
  Limits on Changes in Control............................................   24
  Historical Losses.......................................................   25
  Possible Environmental Liabilities......................................   26
 
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
  Effect on Common Stock Price of Shares Available for Future Sale........   27
  Effect on Holders of Common Stock of an Issuance of Preferred Stock.....   27
  Immediate and Substantial Dilution......................................   27
  Absence of Prior Public Market for Common Stock.........................   27
  Influence of Executive Officers, Directors and Principal Stockholders...   27
  Risks of Fee Management Business........................................   28
  Effect of Market Interest Rates on Price of Common Stock................   28
 
THE COMPANY...............................................................   29
 
BUSINESS AND GROWTH STRATEGIES............................................   31
  Business Strategies.....................................................   31
  Growth Strategies.......................................................   32
 
USE OF PROCEEDS...........................................................   35
  Mortgage Debt to be Repaid..............................................   36
 
DISTRIBUTIONS.............................................................   36
 
CAPITALIZATION............................................................   42
 
DILUTION..................................................................   43
 
SELECTED COMBINED FINANCIAL DATA..........................................   44
 
MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
 OPERATIONS...............................................................   47
  Overview................................................................   47
  Results of Operations...................................................   47
  Pro Forma Operating Results.............................................   52
  Liquidity and Capital Resources.........................................   53
  Cash Flows..............................................................   55
  Inflation...............................................................   55
 
SOUTHERN CALIFORNIA ECONOMY AND OFFICE MARKETS............................   56
  Southern California Economy.............................................   56
  Southern California Office Markets......................................   58
 
BUSINESS AND PROPERTIES...................................................   61
  General.................................................................   61
  Properties..............................................................   61
  Tenants.................................................................   63
  Tenant Diversification..................................................   63
  Lease Distributions.....................................................   63
  Lease Expirations - Portfolio Total.....................................   64
</TABLE>
    
 
                                       i
<PAGE>
   
<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
  Lease Expirations - Property by Property................................   65
  Tenant Retention and Expansions.........................................   70
  Historical Lease Renewals...............................................   70
  Historical Tenant Improvements and Leasing Commissions..................   71
  Historical Capital Expenditures.........................................   72
  Historical Occupancy....................................................   72
 
OFFICE SUBMARKETS AND PROPERTY INFORMATION................................   72
  Los Angeles County Office Market and Properties.........................   74
  Los Angeles West Office Market Sector...................................   75
  Los Angeles North Office Market Sector..................................   79
  Los Angeles South Office Market Sector..................................   83
  Orange County Office Market and Properties..............................   86
  San Diego County Office Market and Property.............................   88
  C&W Market Study........................................................   90
  Competition.............................................................   91
  Insurance...............................................................   91
  Environmental Regulations...............................................   91
  Legal Proceedings.......................................................   93
  Employees...............................................................   93
 
MANAGEMENT................................................................   94
  Directors and Executive Officers........................................   94
  Committees of the Board of Directors....................................   96
  Compensation of Directors...............................................   97
  Executive Compensation..................................................   97
  Employment Agreements...................................................   98
  Stock Incentive Plan....................................................   98
  401(k) Plan.............................................................   99
  Limitation of Liability and Indemnification.............................   99
 
STRUCTURE AND FORMATION OF THE COMPANY....................................  100
  The Operating Entities of the Company...................................  100
  The Formation Transactions..............................................  101
  Consequences of the Offering and the Formation Transactions.............  102
  Determination and Valuation of Ownership Interests......................  102
  Benefits of the Formation Transactions and the Offering to Affiliates of
   the Company............................................................  103
 
POLICIES WITH RESPECT TO CERTAIN ACTIVITIES...............................  104
  Investment Policies.....................................................  104
  Dispositions............................................................  105
  Financing Policies......................................................  105
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
  Conflict of Interest Policies...........................................  106
  Policies with Respect to Other Activities...............................  107
 
CERTAIN TRANSACTIONS......................................................  107
  Formation Transactions..................................................  107
  Partnership Agreement; Redemption/ Exchange Rights......................  107
  Registration Rights.....................................................  107
  Certain Transactions Involving Director Nominee.........................  107
 
PARTNERSHIP AGREEMENT.....................................................  108
  Management..............................................................  108
  Transferability of Interests............................................  108
  Capital Contributions...................................................  109
  Redemption/Exchange Rights..............................................  109
  Issuance of Additional OP Units, Common Stock or Convertible
   Securities.............................................................  109
  Tax Matters.............................................................  109
  Operations..............................................................  110
  Duties and Conflicts....................................................  110
  Certain Voting Rights of Limited Partners...............................  110
  Term....................................................................  110
  Indemnification.........................................................  110
 
PRINCIPAL STOCKHOLDERS....................................................  111
 
CAPITAL STOCK.............................................................  112
  General.................................................................  112
  Common Stock............................................................  112
  Preferred Stock.........................................................  112
  Power to Issue Additional Shares of Common Stock and Preferred Stock....  113
  Transfer Agent and Registrar............................................  113
  Restrictions on Transfer................................................  113
 
CERTAIN PROVISIONS OF MARYLAND LAW AND THE COMPANY'S CHARTER AND BYLAWS...  115
  Board of Directors - Number, Classification, Vacancies..................  115
  Removal of Directors....................................................  116
  Business Combinations...................................................  116
  Control Share Acquisitions..............................................  116
  Amendment to the Charter................................................  117
  Dissolution of the Company..............................................  117
  Advance Notice of Director Nominations and New Business.................  117
  Anti-takeover Effect of Certain Provisions of Maryland Law and of the
   Charter and Bylaws.....................................................  117
</TABLE>
    
 
                                       ii
<PAGE>
   
<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
  Rights to Purchase Securities and Other Property........................  117
 
SHARES AVAILABLE FOR FUTURE SALE..........................................  118
  General.................................................................  118
  Registration Rights.....................................................  119
 
FEDERAL INCOME TAX CONSEQUENCES...........................................  119
  Taxation of the Company.................................................  119
  Failure to Qualify......................................................  124
  Taxation of Taxable U.S. Stockholders Generally.........................  124
  Backup Withholding......................................................  125
  Taxation of Tax-Exempt Stockholders.....................................  125
  Taxation of Non-U.S. Stockholders.......................................  126
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
  Tax Aspects of the Operating Partnership................................  128
  Other Tax Consequences..................................................  130
 
ERISA CONSIDERATIONS......................................................  130
  Employment Benefit Plans, Tax-Qualified Pension, Profit Sharing or Stock
   Bonus Plans and IRAs...................................................  131
  Status of the Company and the Operating Partnership under ERISA.........  131
 
UNDERWRITING..............................................................  133
 
EXPERTS...................................................................  134
 
LEGAL MATTERS.............................................................  135
 
ADDITIONAL INFORMATION....................................................  135
 
GLOSSARY..................................................................  136
</TABLE>
    
 
                              CAUTIONARY STATEMENT
 
    INFORMATION   CONTAINED   IN  THIS   PROSPECTUS   CONTAINS  "FORWARD-LOOKING
STATEMENTS" RELATING TO, WITHOUT LIMITATION, FUTURE ECONOMIC PERFORMANCE,  PLANS
AND  OBJECTIVES OF MANAGEMENT  FOR FUTURE OPERATIONS  AND PROJECTIONS OF REVENUE
AND OTHER FINANCIAL ITEMS, WHICH CAN BE IDENTIFIED BY THE USE OF FORWARD-LOOKING
TERMINOLOGY SUCH AS "MAY," "WILL," "SHOULD," "EXPECT," "ANTICIPATE,"  "ESTIMATE"
OR  "CONTINUE" OR THE NEGATIVE THEREOF OR OTHER VARIATIONS THEREON OR COMPARABLE
TERMINOLOGY. THE  CAUTIONARY  STATEMENTS  SET  FORTH  UNDER  THE  CAPTION  "RISK
FACTORS" AND ELSEWHERE IN THE PROSPECTUS IDENTIFY IMPORTANT FACTORS WITH RESPECT
TO  SUCH FORWARD-LOOKING STATEMENTS, INCLUDING  CERTAIN RISKS AND UNCERTAINTIES,
THAT COULD  CAUSE  ACTUAL  RESULTS  TO DIFFER  MATERIALLY  FROM  THOSE  IN  SUCH
FORWARD-LOOKING STATEMENTS.
 
                                      iii
<PAGE>
                               PROSPECTUS SUMMARY
 
    THE  FOLLOWING SUMMARY  IS QUALIFIED  IN ITS  ENTIRETY BY  THE MORE DETAILED
INFORMATION AND  FINANCIAL STATEMENTS  APPEARING ELSEWHERE  IN THIS  PROSPECTUS.
UNLESS INDICATED OTHERWISE, THE INFORMATION CONTAINED IN THIS PROSPECTUS ASSUMES
THAT  (I) THE INITIAL PUBLIC OFFERING PRICE IS $20.00 PER SHARE (THE MIDPOINT OF
THE PRICE  RANGE SET  FORTH ON  THE COVER  PAGE OF  THIS PROSPECTUS),  (II)  THE
UNDERWRITERS'  OVERALLOTMENT  OPTION IS  NOT  EXERCISED, (III)  THE TRANSACTIONS
DESCRIBED UNDER "STRUCTURE  AND FORMATION  OF THE COMPANY"  ARE CONSUMMATED  AND
(IV)  NONE  OF THE  OP UNITS  REDEEMABLE FOR  CASH  OR, AT  THE ELECTION  OF THE
COMPANY, EXCHANGEABLE  FOR COMMON  STOCK  HAVE BEEN  SO REDEEMED  OR  EXCHANGED.
ALTHOUGH  THE COMPANY AND  THE OPERATING PARTNERSHIP  ARE SEPARATE ENTITIES, FOR
EASE OF REFERENCE AND UNLESS THE  CONTEXT OTHERWISE REQUIRES, ALL REFERENCES  IN
THIS  PROSPECTUS  TO  THE  "COMPANY"  REFER TO  THE  COMPANY  AND  THE OPERATING
PARTNERSHIP, COLLECTIVELY. ALL REFERENCES IN  THIS PROSPECTUS TO THE  HISTORICAL
ACTIVITIES OF THE COMPANY REFER TO THE ACTIVITIES OF THE ARDEN PREDECESSORS. SEE
"GLOSSARY" FOR THE DEFINITIONS OF CERTAIN TERMS USED IN THIS PROSPECTUS.
 
                                  THE COMPANY
 
    The  Company has been formed to continue and expand the real estate business
of Arden Realty  Group, Inc.,  a California corporation  ("Arden"), and  certain
affiliated  entities (collectively, the "Arden  Predecessors") which are engaged
in owning,  acquiring, managing,  leasing and  renovating office  properties  in
Southern  California. The  Company's founders,  Richard S.  Ziman and  Victor J.
Coleman, along  with the  other five  senior officers  at the  Company, have  an
average  of more than 18  years of experience in  the real estate industry. Upon
completion of  the Offering,  the Company  will own  24 office  properties  (the
"Properties")  containing approximately 4.0 million rentable square feet. All of
the Properties  are located  in Southern  California, with  21 in  suburban  Los
Angeles  County, two in Orange County and one  in San Diego County. As of August
1, 1996, the Properties had a  weighted average occupancy rate of  approximately
89%.  Arden  currently manages  22  of the  Properties.  Upon completion  of the
Offering, the Company  will manage  all of  the Properties  and four  additional
properties  containing  approximately  325,000 rentable  square  feet  which are
currently managed by  Arden for  institutional investors  and other  third-party
owners.   The  Company  will  be   a  fully  integrated,  self-administered  and
self-managed real estate company  and expects to qualify  as a REIT for  federal
income tax purposes.
 
   
    The  Company  believes that  all  of the  Properties  are located  in strong
submarkets which  generally  have  significant  rent  growth  potential  due  to
employment  growth, declining  vacancy rates, limited  new construction activity
and existing rental rates at levels  significantly below those required to  make
new  construction economically  feasible. The  Company's portfolio  is comprised
primarily of Class A suburban office properties, as defined by the Company  (and
not  an  independent  third  party). The  Company  generally  considers  Class A
suburban office properties to be those  which have desirable locations and  high
quality finishes, are well maintained and professionally managed and are capable
of  achieving  rental  and  occupancy  rates  which  are  typically  above those
prevailing in their respective markets  although the determination of an  office
property's  class designation is  subjective and consequently  others may have a
different view. Of the  Company's 24 Properties, 20  Properties have been  built
since  1980 and 14 Properties, including all four built prior to 1980, have been
substantially renovated within the last three years.
    
 
    The  Company  believes  that  certain  economic  fundamentals  in   Southern
California provide an attractive environment for owning, acquiring and operating
Class  A  suburban  office  properties. According  to  AMERICA'S  OFFICE ECONOMY
prepared by  Cognetics,  Inc.,  Metropolitan Los  Angeles  (which  includes  Los
Angeles  and Orange Counties),  in which 23  of the Company's  24 Properties are
located, is projected  to be  the number  one market  in the  United States  for
primary  office  employment  growth during  the  period  from 1995  to  2005. In
addition, the Economic Development Corporation  of Los Angeles County (the  "Los
Angeles EDC") has forecast that economic activity will increase twice as fast in
Los  Angeles County  than in the  nation as a  whole during 1996  and 1997, with
inflation-adjusted gross  product growing  at a  rate of  5.2% and  5.0% in  Los
Angeles  County as compared to 2.5% and 2.4% for 1996 and 1997 for the nation as
a whole. Finally, since  1992, there has been  very limited construction of  new
office  properties in the Southern California  region. The Company believes that
this   limited   construction    of   office   properties    coupled   with    a
 
                                       1
<PAGE>
growing economy will continue to result in increased demand for office space and
positive  net absorption in the Southern  California region, and particularly in
the selected submarkets where most of the Properties are located. See  "Southern
California Economy and Office Markets."
 
    Richard  S. Ziman, the Chairman and  Chief Executive Officer of the Company,
has been involved in the  real estate business for over  25 years. In 1979,  Mr.
Ziman  co-founded, as managing general partner, Pacific Financial Group ("PFG"),
whose primary  focus was  to acquire  underperforming office  buildings in  good
locations  and  then  actively  manage, lease  and  renovate  the  properties to
increase cash flow and enhance their value. During the early and mid 1980's, PFG
acquired over  4.0  million  square  feet  of  commercial  office  space  almost
exclusively  in Los Angeles County and Orange  County. In order to capitalize on
the escalation of prices for Southern  California office properties in the  late
1980's,  PFG sold  substantially all of  its interests in  its office properties
portfolio at a gain prior to the  general downturn in the real estate market  in
Southern California.
 
    In  1993,  in anticipation  of a  recovery in  the Southern  California real
estate market,  the  Company  began to  selectively  acquire  commercial  office
properties  located in suburban  Los Angeles County.  In assembling its existing
portfolio and as part of its operating strategy, the Company primarily  acquired
office  properties that were  located in submarkets  with growth potential, were
underperforming or needed  renovation and  which offered  opportunities for  the
Company  to  implement  its value-added  strategy  to increase  cash  flow. This
strategy includes active  management and aggressive  leasing efforts, a  focused
renovation  and refurbishment program for  underperforming assets, reduction and
containment of operating  costs and emphasis  on tenant satisfaction  (including
efforts  to  maximize  tenant  retention at  lease  expiration  and  programs to
relocate tenants to other spaces within the Company's portfolio). The  Company's
commitment  to tenant satisfaction  and retention is  evidenced by its retention
rate of  approximately 82%  (based on  square feet  renewed) from  1993  through
August 1, 1996 and management's on-going relationships with multi-site tenants.
 
    The  Company  believes  that  it has  been  successful  in  implementing its
value-added strategy  as  evidenced  by increased  occupancy  rates  and  rental
revenue  at the Properties.  As of August  1, 1996, the  Properties owned by the
Company for  more  than  one year  had  a  weighted average  occupancy  rate  of
approximately 88%, compared to a weighted average occupancy of approximately 80%
as  of the  respective dates  such Properties were  acquired by  the Company. In
addition, the Company's  occupancy rates  at many  of its  Properties are  above
market  averages in the applicable submarkets based on information included in a
market study prepared by Cushman & Wakefield of California, Inc. ("C&W") for the
Company (the "C&W  Market Study"). As  of August 1,  1996, the weighted  average
occupancy  rate  of  the  21  Properties  located  in  Los  Angeles  County  was
approximately 90%, compared to weighted average occupancy rates, as of  December
31,  1995, of approximately 81% for all office properties throughout Los Angeles
County and approximately 83% for all office properties in the Los Angeles County
submarkets in which such Properties are located  (based in each case on the  C&W
Market Study).
 
                                  RISK FACTORS
 
    An  investment in the  Common Stock involves  various risks, and prospective
investors should carefully consider the  matters discussed under "Risk  Factors"
prior to an investment in the Company. Such risks include, among others:
 
    - the  possibility that the consideration to be  paid by the Company for the
      Properties and  the  other  assets  contributed  to  the  Company  in  its
      formation  may exceed their  fair market value;  no third-party appraisals
      were obtained by the Company regarding these Properties and other assets;
 
    - the possibility that the Company may not be able to refinance  outstanding
      indebtedness  upon maturity  (including the $104  million interim Mortgage
      Financing (as defined below) and the proposed $100 million Credit Facility
      (as  defined  below)  which  will  mature  in  one  year  and  two  years,
      respectively),  that  interest  rates  might  increase  on  variable  rate
      indebtedness, including any amounts outstanding under the Credit Facility,
      and that such indebtedness might be refinanced at higher interest rates or
      otherwise  on  terms   less  favorable  to   the  Company  than   existing
      indebtedness, which
 
                                       2
<PAGE>
   
      could   adversely   affect  the   Company's   ability  to   make  expected
      distributions to stockholders and  its ability to qualify  as a REIT,  and
      the  lack of limitations in the  Company's organizational documents on the
      amount of indebtedness which the Company may incur;
    
 
   
    - the risk that the Company's cash  available for distributions may be  less
      than  the Company estimates  or may decrease  in future periods, adversely
      affecting the Company's ability to make expected distributions for the  12
      months  following  the  Offering  of  $1.60  per  share,  which represents
      approximately 98.0% of estimated cash  available for distributions, or  to
      sustain such distribution rate in the future;
    
 
    - real  estate investment and property management  risks such as the need to
      renew leases or relet space upon  lease expirations and, at times, to  pay
      renovation  and  reletting costs  in connection  therewith, the  effect of
      economic and other conditions  on office property  cash flows and  values,
      the  ability of tenants to make lease  payments, the ability of a property
      to generate  revenue  sufficient  to meet  operating  expenses,  including
      future  debt service, and the illiquidity  of real estate investments, all
      of which  may adversely  affect  the Company's  ability to  make  expected
      distributions to stockholders;
 
    - concentration  of all  of the Properties  in Southern  California, and the
      dependence of the  Properties on  the conditions  of the  economy and  the
      office  markets  of  Southern California  and,  particularly,  Los Angeles
      County, which increases the risk  of the Company being adversely  affected
      by  a downturn in the Southern California or Los Angeles County economy or
      office markets;
 
    - conflicts of interests in connection  with the Formation Transactions  and
      the  acquisition and  refinancing of  the Properties,  including conflicts
      relating to material benefits to officers, directors and affiliates of the
      Company which include receipt of  an aggregate of approximately  2,740,718
      OP  Units and stock options to purchase  an aggregate of 868,500 shares of
      Common Stock, special allocations of interest deductions of  approximately
      $12.6 million and repayment of approximately $398 million of indebtedness,
      a  substantial portion of which represents  the repayment of mortgage debt
      to an affiliate of  the lead managing underwriter  of the Offering out  of
      the net proceeds of the Offering and the Mortgage Financing;
 
    - conflicts  of  interest involving  management of  the Company  and certain
      members of  the Board  of Directors  in business  decisions regarding  the
      Company,  including  conflicts  associated  with  any  prepayment  of debt
      secured by  the Properties  that may  arise due  to the  more adverse  tax
      consequences  of such prepayment  to certain members  of management and of
      the Board of Directors as holders of OP Units;
 
    - the risks that,  given the  Company's recent  acquisition of  many of  the
      Properties  and the lack of operating history of such Properties under the
      Company's management (3 1/2 years or less for all Properties and less than
      one year for a majority of the Properties), newly acquired properties  may
      have  characteristics or deficiencies unknown to the Company affecting the
      value or revenue potential  thereof, may fail to  perform as expected,  or
      may  be  difficult to  integrate  into the  Company's  existing management
      operations;
 
    - the possibility that  the Board  of Directors of  the Company  may in  the
      future  amend or revise the investment, financing, borrowing, distribution
      and conflicts of interest  policies of the Company  without a vote 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, treatment of the Operating Partnership as
      an association  taxable 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  such event  and the resulting
      decrease in cash available for distribution;
 
    - risks that certain types of losses, such as from earthquakes, could exceed
      the Company's  insurance  coverage  which  currently  includes  earthquake
      coverage for all of the Properties;
 
    - dependence on certain key personnel;
 
                                       3
<PAGE>
    - anti-takeover  effect  of  limiting actual  or  constructive  ownership of
      Common Stock of the Company by a single person to 9.0% of the  outstanding
      capital  stock, subject  to certain  specified exceptions,  and of certain
      other provisions contained in the organizational documents of the  Company
      and  the Operating  Partnership, which  may have  the effect  of delaying,
      deferring or preventing a transaction or change in control of the  Company
      that might involve a premium price for the Common Stock or otherwise be in
      the best interests of the Company's stockholders;
 
    - existence of net losses of the Arden Predecessors, on a combined basis, of
      approximately  $2.1 million  for the  six months  ended June  30, 1996 and
      approximately $576,000 for the year ended December 31, 1995;
 
    - possible  environmental  liabilities  in  connection  with  the  Company's
      ownership and/or operation of the Properties;
 
    - effect  of shares  available for  future sale on  the price  of the Common
      Stock;
 
    - immediate and  substantial dilution  in the  net tangible  book value  per
      share of the shares of Common Stock purchased in the Offering; and
 
    - absence of a prior public market for the Common Stock.
 
                         BUSINESS AND GROWTH STRATEGIES
 
    The  Company's primary  business objectives are  to maximize  growth in cash
flow and to enhance the value of its portfolio in order to maximize total return
to its stockholders.  The Company believes  it can achieve  these objectives  by
continuing  to implement its business strategies  and capitalize on the external
and internal growth  opportunities described below.  The Company also  believes,
based  on its  evaluation of  market conditions, that  a number  of factors will
enhance its  ability  to achieve  its  business objectives,  including  (i)  the
continuing  improvement  in the  Southern California  economy; (ii)  the limited
construction of new office properties in  the Southern California region due  to
the  substantial  cost  to develop  new  office properties  compared  to current
acquisition prices  and substantial  building construction  limitations in  many
submarkets,  which provides  opportunities to  maximize occupancy  rates, rental
rates and  overall  portfolio  value;  and (iii)  the  limited  availability  of
conventional  real estate financing for new construction of office properties in
Southern California.
 
BUSINESS STRATEGIES
 
    The Company's primary business  strategies are to  (i) acquire and  renovate
underperforming  office properties or properties which provide attractive yields
with stable  cash flow  in submarkets  where  it can  utilize its  local  market
expertise  and  extensive  real  estate  experience;  (ii)  actively  manage its
portfolio; and  (iii) selectively  provide real  estate management  services  to
third  parties. When market conditions permit,  the Company may also develop new
properties in submarkets where it has local market expertise.
 
    Based  on  its  historical  activities  and  its  knowledge  of  the   local
marketplace, the Company believes that (i) the Southern California region offers
growth  opportunities for companies like  the Company that are well-capitalized,
experienced owners of real estate with extensive local market expertise and (ii)
being a public company will enhance its ability to obtain acquisition financing,
to take advantage of  opportunities to acquire  additional office properties  at
attractive prices and to develop office properties, when feasible, at attractive
returns.  Through  four regional  offices, the  Company implements  its business
strategies by: (i) emphasizing tenant  satisfaction and retention and  employing
intensive  property  marketing  programs;  (ii)  utilizing  a  multidisciplinary
approach to acquisition, management, leasing  and renovation activities that  is
designed  to  coordinate decision-making  and  enhance responsiveness  to market
opportunities and tenant needs; and  (iii) implementing cost control  management
and  systems that  capitalize on  economies of scale  arising from  the size and
location  of   the  Company's   portfolio.  The   Company  believes   that   the
implementation  of these operating practices has  led to the increased occupancy
rates and rental revenue of its existing portfolio.
 
                                       4
<PAGE>
GROWTH STRATEGIES
 
    EXTERNAL GROWTH:  Based on its  own historical activities and its  knowledge
of  the local marketplace,  the Company believes  that opportunities continue to
exist to  acquire  additional office  properties  that: (i)  provide  attractive
initial  yields with significant potential for growth  in cash flow; (ii) are in
desirable locations within submarkets which  the Company believes have  economic
growth  potential; and (iii)  are underperforming or  need renovation, and which
therefore provide opportunities for  the Company to increase  the cash flow  and
value of such properties through active management and aggressive leasing.
 
    The  Company  intends  to  continue  to  acquire  office  properties  within
submarkets  in   Southern  California   which  the   Company  believes   present
opportunities  for long-term  stable and rising  rental rates  due to employment
growth,  population  movements  within  the  region  and  restrictions  on   new
development.  The Company generally targets properties which are underperforming
or need renovation  and offer  opportunities for  the Company  to implement  its
value-added  strategy to increase cash flow. For  example, as of August 1, 1996,
the Properties  owned by  the Company  for more  than one  year had  a  weighted
average occupancy rate of approximately 88%, compared to approximately 80% as of
the  respective  dates  such  Properties  were  acquired  by  the  Company. Upon
completion of  the  Offering,  the  Company will  have  a  debt-to-total  market
capitalization  ratio of approximately 19.3% and expects to finance acquisitions
through its proposed $100 million Credit Facility, although it may employ  other
financing alternatives.
 
    In  addition, the Company  will seek to acquire  properties at a significant
discount to  replacement  cost in  the  relevant office  submarkets.  Since  the
beginning  of  1993, the  Company has  acquired its  Properties in  suburban Los
Angeles County  at a  cost which  the Company  believes is  significantly  below
replacement  cost  based on  estimates of  replacement costs  of Class  A office
buildings included in the C&W Market Study. See "Southern California Economy and
Office Markets."
 
    The Company believes it has certain competitive advantages which enhance its
ability to identify and capitalize on acquisition opportunities, including:  (i)
management's  significant local  market expertise,  experience and  knowledge of
properties, submarkets  and potential  tenants  within the  Southern  California
region;  (ii) management's long-standing relationships with tenants, real estate
brokers and institutional and other owners of commercial real estate; (iii)  its
fully  integrated  real estate  operations which  allow  the Company  to respond
quickly to  acquisition  opportunities and  enable  it to  provide  real  estate
management   services  to  third   parties  as  a   means  of  identifying  such
opportunities; (iv) its  access to capital  as a public  company, including  the
Company's  proposed $100  million Credit  Facility; (v)  its ability  to acquire
properties in exchange for OP  Units or Common Stock  if the sellers so  desire;
and   (vi)  management's  reputation  as  an  experienced  purchaser  of  office
properties in Southern  California which  has the ability  to effectively  close
transactions.
 
    The  Company also  may seek  to take  advantage of  management's development
expertise to develop office space when market conditions support office building
development. The Company believes, however,  that opportunities exist for it  to
continue  to acquire  office properties  within selected  submarkets in Southern
California at less than  replacement cost and,  therefore, currently intends  to
focus on acquisitions rather than development.
 
    INTERNAL  GROWTH:  The Company believes that opportunities exist to increase
cash flow  from its  existing  portfolio and  that  such opportunities  will  be
enhanced  as the  Southern California  office market  continues to  improve. The
Company intends to  pursue internal  growth by  (i) continuing  to maintain  and
improve  occupancy rates through active  management and aggressive leasing; (ii)
realizing fixed contractual base rental  increases or increases tied to  indices
such  as the Consumer Price Index  (the "CPI"); (iii) re-leasing expiring leases
at increasing  market  rents which  are  expected  to result,  over  time,  from
increased  demand  for office  space  in Southern  California;  (iv) controlling
operating expenses through  the implementation  of cost  control management  and
systems;  (v) capitalizing on  economies of scale  arising from the  size of its
portfolio; and  (vi) increasing  revenue generated  from parking  facilities  at
certain  Properties where the  Company is currently offering  free parking as an
amenity or charging below market rates.
 
                                       5
<PAGE>
                                 THE PROPERTIES
 
    Upon completion of the Offering, the  Company will own 24 office  properties
containing  approximately  4.0  million  rentable  square  feet.  The Properties
consist primarily of Class A  suburban office properties and individually  range
from  approximately 49,000 to 540,000 rentable square feet. The Company believes
that  the  Properties  have  desirable  locations  within  established  business
communities  and  are  well-maintained.  Of  the  Company's  24  Properties,  20
Properties have been  built since  1980 and  14 Properties,  including all  four
built  prior to  1980, have been  substantially renovated within  the last three
years. The average age of the buildings is approximately 12.6 years.
 
    Management believes that  the location  and quality of  construction of  the
Properties,  as well as the  Company's reputation for providing  a high level of
tenant service, have enabled the Company to attract and retain a diverse  tenant
base.  As of August 1, 1996, the Properties  were leased to over 540 tenants, no
single tenant  accounted  for more  than  approximately 3.3%  of  the  aggregate
Annualized Base Rent of the Company's portfolio and only 16 tenants individually
represented more than 1% of such aggregate Annualized Base Rent.
 
                                       6
<PAGE>
    The  following  table  sets  forth certain  information  about  each  of the
Properties as of August 1, 1996:
   
<TABLE>
<CAPTION>
                                                                                                      PERCENTAGE
                                                                                                       OF TOTAL
                                                                                       APPROXIMATE     PORTFOLIO
                                                                        YEAR BUILT/      RENTABLE      RENTABLE       PERCENT
SUBMARKET/PROPERTY                              LOCATION                 RENOVATED     SQUARE FEET    SQUARE FEET     LEASED
- ----------------------------------------------  --------------------  ---------------  ------------  -------------  -----------
<S>                                             <C>                   <C>              <C>           <C>            <C>
LOS ANGELES COUNTY
- ----------------------------------------------
LOS ANGELES WEST
  BEVERLY HILLS/CENTURY CITY
    9665 Wilshire                               Beverly Hills         1972/92-3            158,684           3.9%         95.1%
    Beverly Atrium                              Beverly Hills         1989                  61,314           1.5         100.0
    Century Park Center                         Los Angeles           1972/94              243,404           6.0          83.2
  WESTWOOD/WEST LOS ANGELES
    Westwood Terrace                            Los Angeles           1988                 135,943           3.4          82.3
    1950 Sawtelle                               Los Angeles           1988/95              103,772           2.6          77.5
  MARINA AREA/CULVER CITY/LAX
    400 Corporate Pointe                        Culver City           1987                 164,598           4.1          90.2
    Bristol Plaza                               Culver City           1982                  84,014           2.1          78.6
    Skyview Center                              Los Angeles           1981,87/95(3)        391,675           9.7          86.0
  PARK MILE/WEST HOLLYWOOD
    The New Wilshire                            Los Angeles           1986                 202,704           5.0          83.9
LOS ANGELES NORTH
  SIMI/CONEJO VALLEY
    5601 Lindero Canyon                         Westlake              1989                 105,830           2.6         100.0
    Calabasas Commerce Center                   Calabasas             1990                 123,121           3.1         100.0
  WEST SAN FERNANDO VALLEY
    Woodland Hills Financial Center             Woodland Hills        1972/95              224,955           5.6          89.8
  CENTRAL SAN FERNANDO VALLEY
    16000 Ventura Blvd.                         Encino                1980/96              174,841           4.3          84.1
  EAST SAN FERNANDO VALLEY/TRI-CITIES
    425 West Broadway                           Glendale              1984                  71,589           1.8          95.9
    303 Glenoaks (4)                            Burbank               1983/96              175,449           4.3          97.4
    70 South Lake                               Pasadena              1982/94              100,133           2.5          81.4
LOS ANGELES SOUTH
  LONG BEACH
    4811 Airport Plaza Drive                    Long Beach            1987/95              121,610           3.0         100.0
    4900/10 Airport Plaza Drive                 Long Beach            1987/95              150,403           3.7         100.0
    5000 East Spring                            Long Beach            1989/95              163,358           4.0          89.6
    100 West Broadway                           Long Beach            1987/96              191,727           4.7          90.0
  CERRITOS/NORWALK
    12501 East Imperial Highway (4)             Norwalk               1978/94              122,175           3.0          94.7
ORANGE COUNTY
- ----------------------------------------------
  WEST COUNTY
    5832 Bolsa Avenue                           Huntington Beach      1985                  49,355           1.2         100.0
  TRI-FREEWAY AREA
    Anaheim City Centre                         Anaheim               1986/91              175,391           4.3          93.0
SAN DIEGO COUNTY
- ----------------------------------------------
  SAN DIEGO MARKET
    Imperial Bank Tower                         San Diego             1982/96              540,413          13.4          82.2
                                                                                       ------------        -----         -----
    Total/Weighted Average                                                               4,036,458         100.0%         88.9%
Weighted Average Rent Per Leased Square Foot - All Leases
Weighted Average Rent Per Leased Square Foot - Full Service Gross Leases
Weighted Average Rent Per Leased Square Foot - Net Leases
 
<CAPTION>
                                                   ANNUALIZED
                                                  NET EFFECTIVE      ANNUALIZED
                                                      RENT            BASE RENT
                                                   PER LEASED        PER LEASED
SUBMARKET/PROPERTY                               SQUARE FOOT (1)   SQUARE FOOT (2)
- ----------------------------------------------  -----------------  ---------------
<S>                                             <C>                <C>
LOS ANGELES COUNTY
- ----------------------------------------------
LOS ANGELES WEST
  BEVERLY HILLS/CENTURY CITY
    9665 Wilshire                                   $   31.57         $   31.45
    Beverly Atrium                                      20.46             22.83
    Century Park Center                                 19.86             21.38
  WESTWOOD/WEST LOS ANGELES
    Westwood Terrace                                    24.32             25.30
    1950 Sawtelle                                       19.74             20.02
  MARINA AREA/CULVER CITY/LAX
    400 Corporate Pointe                                23.24             19.91
    Bristol Plaza                                       17.12             18.10
    Skyview Center                                      16.76             17.01
  PARK MILE/WEST HOLLYWOOD
    The New Wilshire                                    20.30             20.35
LOS ANGELES NORTH
  SIMI/CONEJO VALLEY
    5601 Lindero Canyon                                 10.51             11.15
    Calabasas Commerce Center                           16.81             17.14
  WEST SAN FERNANDO VALLEY
    Woodland Hills Financial Center                     20.52             22.29
  CENTRAL SAN FERNANDO VALLEY
    16000 Ventura Blvd.                                 19.55             20.21
  EAST SAN FERNANDO VALLEY/TRI-CITIES
    425 West Broadway                                   17.72             19.35
    303 Glenoaks (4)                                    20.03             20.35
    70 South Lake                                       18.65             20.80
LOS ANGELES SOUTH
  LONG BEACH
    4811 Airport Plaza Drive                             9.12              8.64
    4900/10 Airport Plaza Drive                          8.22              7.80
    5000 East Spring                                    18.41             18.76
    100 West Broadway                                   22.08             20.42
  CERRITOS/NORWALK
    12501 East Imperial Highway (4)                     16.71             16.27
ORANGE COUNTY
- ----------------------------------------------
  WEST COUNTY
    5832 Bolsa Avenue                                   13.20             13.35
  TRI-FREEWAY AREA
    Anaheim City Centre                                 15.47             15.07
SAN DIEGO COUNTY
- ----------------------------------------------
  SAN DIEGO MARKET
    Imperial Bank Tower                                 19.14             18.31
                                                       ------            ------
    Total/Weighted Average
Weighted Average Rent Per Leased Square Foot -      $   18.62         $   18.70
Weighted Average Rent Per Leased Square Foot -      $   18.94(5)      $   20.03(5)
Weighted Average Rent Per Leased Square Foot -      $   11.99         $   11.52
</TABLE>
    
 
- -----------------
   
(1) Annualized Net  Effective Rent  is calculated for  each lease  in effect  at
    August  1, 1996. For leases in effect  at the time the relevant Property was
    acquired, Annualized  Net  Effective  Rent is  calculated  by  dividing  the
    remaining  lease payments under the lease  by the number of months remaining
    under the lease and  multiplying the result by  12. For leases entered  into
    after  the relevant Property was acquired,  Annualized Net Effective Rent is
    calculated by dividing all lease payments  under the lease by the number  of
    months  in the  lease and multiplying  the result  by 12. For  leases at the
    Acquisition Properties  (303  Glenoaks  and  1250  East  Imperial  Highway),
    Annualized  Net Effective Rent is calculated by assuming the Properties were
    acquired on August  1, 1996  and by  dividing the  remaining lease  payments
    under  the  lease by  the number  of  months remaining  under the  lease and
    multiplying the  result by  12.  The foregoing  amounts  were in  all  cases
    adjusted  for tenant improvements  and leasing commissions,  if any, paid or
    payable by the Company  and reflect adjustments  for the Company's  expected
    future  capital expenditures per square foot  of $0.18 which is greater than
    its historical capital expenditures per square foot.
    
 
   
(2) Annualized Base  Rent is the  monthly contractual base  rent under  existing
    leases  as of August  1, 1996 multiplied  by 12. The  amounts in this column
    that exceed the counterpart amounts  under the column headed Annualized  Net
    Effective Rent Per Leased Square Foot do so primarily because the amounts in
    this column do not reflect future scheduled rent increases.
    
 
(3)  Skyview  Center consists  of two  Class  A 11-  and 12-story  office towers
    completed in 1981 and 1987, respectively, which were both renovated in 1995.
 
(4) Acquisition Property to be acquired concurrently with the Offering.
 
(5) The weighted average rent per leased square foot is calculated based only on
    rent which is received from tenants  under full service gross leases,  which
    represent  approximately  84% of  the  total portfolio  leased  square feet.
    Excluded are 5601 Lindero Canyon, 4811 Airport Plaza Drive, 4900/10  Airport
    Plaza  Drive,  5832 Bolsa  Avenue, 55.6%  of leased  space at  400 Corporate
    Pointe leased  to  Pepperdine  University,  and 48.3%  of  leased  space  at
    Calabasas Commerce Center leased to two net tenants.
 
                                       7
<PAGE>
                     STRUCTURE AND FORMATION OF THE COMPANY
 
FORMATION TRANSACTIONS
 
    Concurrently  with the  consummation of  the Offering,  the Company  and the
Operating Partnership,  together with  the  partners and  members of  the  Arden
Predecessors  and other parties which hold ownership interests in certain of the
Properties (collectively, the "Participants"), will engage in certain  formation
transactions  (the  "Formation Transactions").  The Formation  Transactions have
been designed  to (i)  enable the  Company  to raise  the necessary  capital  to
acquire  the Properties and  repay certain mortgage  debt relating thereto, (ii)
provide a vehicle for  future acquisitions, (iii) enable  the Company to  comply
with  certain requirements  under the  federal income  tax laws  and regulations
relating to REITs, (iv) facilitate potential securitized mortgage financings and
(v)  preserve  certain  tax  advantages  for  certain  Arden  Predecessors.  The
Formation Transactions are as follows:
 
    - The Company will sell shares of Common Stock in the Offering.
 
    - Pursuant  to  separate option  agreements  (the "Option  Agreements"), the
      Company will acquire  for cash  from certain  Participants (not  including
      Messrs.  Ziman  and Coleman  who will  not receive  cash in  the Formation
      Transactions) the interests owned by  such Participants in certain of  the
      Arden  Predecessors and in certain of the Properties. The Company will pay
      approximately $26.8 million from the net proceeds of the Offering for such
      interests  which  represent  31.7%  of  the  ownership  interests  in  the
      Properties to be acquired by the Company.
 
    - The  Company will contribute  (i) the interests  in the Arden Predecessors
      and in the Properties acquired pursuant to the Option Agreements and  (ii)
      the   net  proceeds  from   the  Offering  (after   payment  of  the  cash
      consideration to certain Participants as described above) to the Operating
      Partnership in  exchange for  a  86.69% general  partner interest  in  the
      Operating Partnership.
 
    - Pursuant   to   separate   contribution   agreements   (the  "Contribution
      Agreements"), the following additional contributions  will be made to  the
      Operating  Partnership  in  exchange  for  OP  Units  representing limited
      partner interests: (i) certain Participants will contribute the  remaining
      interests  in  the Arden  Predecessors and  in  certain of  the Properties
      (I.E., all interests not  acquired by the Company  pursuant to the  Option
      Agreements)  and  (ii)  Arden  will  contribute  certain  of  its  assets,
      including management contracts relating to  certain of the Properties  and
      the  contract rights to purchase  the Acquisition Properties (303 Glenoaks
      and  12501   East  Imperial   Highway).  The   Participants  making   such
      contributions  (a total of seven  individuals and entities including Arden
      and Messrs. Ziman and Coleman), will receive an aggregate of 2,889,071  OP
      Units, with an estimated value of approximately $57.8 million based on the
      assumed initial public offering price of the Common Stock.
 
    - The  Company, through the Operating Partnership, will borrow approximately
      $104 million aggregate principal amount under a one year interim loan (the
      "Mortgage Financing") which will  be non-recourse to  the Company and  the
      Operating  Partnership  and  secured  by  fully  cross-collateralized  and
      cross-defaulted first  mortgage  liens  on nine  of  the  Properties  (the
      "Mortgage  Financing  Properties").  The Mortgage  Financing  will require
      monthly payments of  interest only, with  all principal due  on the  first
      anniversary of the closing of the Mortgage Financing.
 
    - Approximately $35 million of the net proceeds of the Offering will be used
      by the Operating Partnership to purchase the Acquisition Properties.
 
    - Approximately  $398 million  of the net  proceeds of the  Offering and the
      $103 million net proceeds  of the Mortgage Financing  will be used by  the
      Operating  Partnership  to  repay  certain mortgage  debt  secured  by the
      Properties and  indebtedness  outstanding  under lines  of  credit  to  be
      assumed by the Operating Partnership in the Formation Transactions.
 
    - The  Company, through the Operating Partnership, expects to enter into the
      proposed $100 million Credit Facility at  or shortly after the closing  of
      the foregoing Formation Transactions.
 
    Additional  information regarding  the Formation  Transactions is  set forth
under "Structure and Formation of the Company."
 
                                       8
<PAGE>
    Upon completion  of the  Formation Transactions,  the Operating  Partnership
will  hold substantially all of the assets of the Company, including 100% of the
interests in all of the Properties. Based on the assumed initial public offering
price of the Common Stock,  (i) the purchasers of  Common Stock in the  Offering
will  own substantially all of the  outstanding Common Stock (or 86.69% assuming
exchange of all OP Units for shares  of Common Stock), (ii) the Company will  be
the sole general partner of the Operating Partnership and will own 86.71% of the
interests  in the Operating Partnership and (iii) Messrs. Ziman and Coleman will
beneficially own, directly or  indirectly through affiliates (including  Arden),
2,185,229  OP  Units  (representing a  10.05%  limited partner  interest  in the
Operating Partnership).  Pursuant to  the  partnership agreement  governing  the
Operating  Partnership (the "Partnership Agreement"), the Participants receiving
OP Units in the Formation Transactions  will have certain rights, beginning  one
year  after consummation of the Offering,  to cause the Operating Partnership to
redeem their OP Units for cash or,  at the election of the Company, to  exchange
their  OP  Units  for shares  of  Common  Stock (on  a  one-for-one  basis). See
"Underwriting" for certain transfer restrictions applicable to the OP Units held
by Messrs. Ziman and Coleman  and to shares of  Common Stock issued in  exchange
for such OP Units.
 
    The  aggregate estimated value  of the cash and  OP Units to  be paid by the
Company  and  the  Operating  Partnership   for  the  interests  in  the   Arden
Predecessors,  the direct interests in certain  of the Properties and the assets
of Arden  is  approximately $84.6  million.  The  aggregate book  value  of  the
interests  and  assets  to  be  transferred to  the  Company  and  the Operating
Partnership is  approximately  $14.1  million,  of  which  approximately  $2,000
constitutes  the  aggregate  book  value  of  the  interests  and  assets  to be
transferred to the Operating Partnership by Messrs. Ziman and Coleman.
 
    No independent third-party appraisals, valuations or fairness opinions  have
been  obtained by  the Company  in connection  with the  Formation Transactions.
Accordingly, there can be no assurance that  the value of the OP Units and  cash
received  by the Participants in the Formation Transactions is equivalent to the
fair market  value of  the interests  and  assets acquired  by the  Company  and
contributed  to the Operating Partnership. See "Risk Factors -- Price to be Paid
for Properties and Other Assets May Exceed Their Fair Market Value."
 
STRUCTURE OF THE COMPANY
 
    The Company will be the sole  general partner of the Operating  Partnership.
The Company will conduct substantially all of its business through the Operating
Partnership,  which will hold all of  the Company's interests in the Properties.
As the sole general partner of the Operating Partnership, the Company will  have
exclusive power to manage and conduct the business of the Operating Partnership,
subject  to  certain limited  exceptions. See  "Structure  and Formation  of the
Company -- The Operating Entities of the Company" and "Partnership Agreement  --
Management."  In connection with the refinancing  of the Mortgage Financing, the
Company expects that  it will  form financing subsidiaries  (as depicted  below)
into  which  the  Mortgage Financing  Properties  will be  transferred.  See "--
Mortgage Financing and Credit Facility."
 
                                       9
<PAGE>
    The following diagram depicts the ownership structure of the Company and the
Operating  Partnership  upon  completion  of  the  Offering  and  the  Formation
Transactions  and assuming  the completion  of the  CMBS Offering  (the entities
depicted with dotted lines  represent the ownership  structure of the  financing
subsidiaries which the Company intends to form):
 
                         STRUCTURE OF THE COMPANY UPON
           COMPLETION OF THE OFFERING AND THE FORMATION TRANSACTIONS
                AND ASSUMING THE COMPLETION OF THE CMBS OFFERING
 
    The chart entitled "Structure of the Company Upon Completion of the Offering
and the Formation Transactions" depicts the following:
 
    (i)  Arden Realty Group,  Inc. (the "Company")  is owned 100%  by the public
stockholders;
 
    (ii) the Company holds  on 86.32% General Partner  Interest in Arden  Realty
Group Limited Partnership (the "Operating Partnership");
 
    (iii)  Richard S.  Zimon and  Victor J.  Coleman collectively  hold a 10.28%
Limited Partner Interest in the Operating Partnership; and
 
    (iv) the Other Participants in the Formation Transactions held an  aggregate
3.40% Limited Partner Interest in the Operating Partnership.
 
BENEFITS TO RELATED PARTIES
 
    Certain  affiliates of the Company will realize certain material benefits in
connection with the Formation Transactions, including the following:
 
    - In  exchange  for  their  respective  ownership  interests  in  the  Arden
      Predecessors  and  the assets  of Arden,  Messrs.  Ziman and  Coleman will
      become beneficial owners of  a total of 2,185,229  OP Units, with a  total
      value  of approximately $43.7 million based  on the assumed initial public
      offering price of the Common Stock,  which value may differ from the  fair
      market  value of such interests and assets and compares to a book value of
      such interests and assets of approximately $2,000 as of June 30, 1996. The
      Company does not believe that the book values of the interests and  assets
      exchanged  are equivalent to the fair  market values of such interests and
      assets.
 
    - Approximately $398 million of indebtedness  secured by the Properties  and
      indebtedness outstanding under lines of credit, and the related additional
      and  accrued interest thereon, to be  assumed by the Operating Partnership
      will be repaid in the Formation Transactions.
 
    - Pursuant to the  Partnership Agreement, certain  Participants who hold  OP
      Units,   including  Messrs.  Ziman  and   Coleman,  will  receive  special
      allocations of interest deductions of approximately $12.6 million relating
      to the repayment of mortgage debt on certain of the Properties.
 
    - Messrs. Ziman and  Coleman will  serve as  directors and  officers of  the
      Company  and  the Operating  Partnership  and will  enter  into employment
      agreements providing  for annual  salaries, bonuses,  severance  packages,
      participation in the Company's Stock Incentive Plan and other benefits for
      their services.
 
    - So  long as  he is  Chief Executive Officer,  Mr. Ziman  will have certain
      proportional purchase rights in connection with future issuances of Common
      Stock by the Company or OP  Units by the Operating Partnership which  will
      enable  him to maintain  his overall percentage  ownership of the combined
      equity of the Company and the Operating Partnership.
 
    - Certain  Participants  including  Messrs.  Ziman  and  Coleman  will  have
      registration  rights  with respect  to shares  of  Common Stock  issued in
      exchange for OP Units.
 
    Additional information  regarding these  and certain  other benefits  to  be
received  by  affiliates  of  the  Company  in  connection  with  the  Formation
Transactions is  set forth  under "Structure  and Formation  of the  Company  --
Benefits  of the  Formation Transactions and  the Offering to  Affiliates of the
Company," and
 
                                       10
<PAGE>
"Management --  Employment  Agreements."  See  "Risk  Factors  --  Conflicts  of
Interest  in Formation Transactions and the  Business of the Company -- Benefits
from the Formation Transactions" and "Certain Transactions."
 
DETERMINATION AND VALUATION OF OWNERSHIP INTERESTS
 
    The  Company's  percentage  interest   in  the  Operating  Partnership   was
determined   based  upon  the   percentage  of  estimated   Cash  Available  for
Distribution (as defined  herein) required to  pay estimated cash  distributions
resulting  in an  annual distribution  rate equal to  8% of  the assumed initial
public offering  price  of the  Common  Stock.  The ownership  interest  in  the
Operating  Partnership allocated to  the Company is equal  to this percentage of
estimated Cash  Available for  Distribution and  the remaining  interest in  the
Operating  Partnership will be allocated to  the Participants receiving OP Units
in the Formation Transactions. The  parameters and assumptions used in  deriving
the   estimated   Cash   Available   for   Distribution   are   described  under
"Distributions."
 
    The Company did not  obtain appraisals with respect  to the market value  of
any  of the  Properties or  other assets that  the Company  will own immediately
after consummation of the Offering and the Formation Transactions or an  opinion
as  to  the  fairness of  the  allocation of  shares  to the  purchasers  in the
Offering. The initial public offering price  has been determined based upon  the
estimated  Cash  Available  for  Distribution and  the  factors  discussed under
"Underwriting," rather than a property-by-property 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 a  view to values  that could be  obtained from a  liquidation of  the
Company or of individual properties owned by the Company.
 
RESTRICTIONS ON TRANSFER
 
    Under   the  Partnership  Agreement,  the   Participants  in  the  Formation
Transactions are  prohibited  from transferring  their  OP Units,  except  under
certain limited circumstances. Messrs. Ziman and Coleman have agreed not to sell
any  shares of  Common Stock acquired  by them upon  exchange of OP  Units for a
period of two years after the completion of the Offering without the consent  of
Lehman Brothers Inc. See "Partnership Agreement -- Transferability of Interests"
and "Underwriting."
 
RESTRICTIONS ON OWNERSHIP OF COMMON STOCK
 
    Due  to limitations  on the  concentration of ownership  of stock  of a REIT
imposed by  the Internal  Revenue Code  of 1986,  as amended  (the "Code"),  the
charter  of the Company (the "Charter")  prohibits any stockholder from actually
or constructively owning  more than  9.0% of  the outstanding  shares of  Common
Stock  (the "Ownership Limit"), except that Mr. Ziman and certain family members
and  affiliates  may  actually  and  constructively  own  up  to  13.0%  of  the
outstanding  shares of Common Stock.  See "Risk Factors --  Limits on Changes in
Control" and "Capital Stock -- Restrictions on Transfer."
 
                               FINANCING POLICIES
 
    As a general policy, the Company intends, but is not obligated, to limit its
debt to total market capitalization ratio to no more than 50%. Since such  ratio
is  based upon market  values of equity,  it will fluctuate  with changes in the
price of  the  Common Stock;  however,  the  Company believes  that  this  ratio
provides  an appropriate indication  of leverage for a  company whose assets are
primarily real estate. The Company's  debt to total market capitalization  ratio
at  the  time  of  the  Offering  will  be  approximately  19.3%  (17.6%  if the
Underwriters' overallotment option  is exercised  in full).  See "Policies  With
Respect To Certain Transactions -- Financing Policies."
 
             MORTGAGE FINANCING, CMBS OFFERING AND CREDIT FACILITY
 
    MORTGAGE  FINANCING.  The  Company has received a  commitment for an interim
loan (the "Mortgage Financing") in the amount of $104 million from an  affiliate
of Lehman Brothers Inc. The Mortgage Financing is expected to have a maturity of
one  year and  bear interest at  a floating  rate equal to  one-month LIBOR plus
1.50% for  the  first  six  months increasing  to  one-month  LIBOR  plus  2.00%
thereafter through maturity. The proceeds of the Mortgage Financing will be used
primarily to refinance a portion of the
 
                                       11
<PAGE>
Company's  existing  mortgage  indebtedness.  The  Mortgage  Financing  will  be
non-recourse and secured by fully cross-collateralized and cross-defaulted first
mortgage liens on the nine Mortgage Financing Properties. The Mortgage Financing
will require monthly payments  of interest only, with  all principal due on  the
first anniversary of the closing of the Mortgage Financing.
 
    The  Company intends to refinance the Mortgage Financing through an offering
of commercial mortgage-backed securities (the "CMBS  Offering") to be made by  a
financing  subsidiary which the Company  intends to form for  that purpose in an
amount of  approximately $104  million with  a  term of  seven years.  The  CMBS
offering  is expected  to bear  interest at a  floating rate  based on one-month
LIBOR. The Company intends  to enter into  a swap agreement  with a major  money
center  bank in  the notional  amount of  $104 million  upon completion  of this
Offering and  the  Formation  Transactions  or  shortly  thereafter  (the  "Swap
Agreement"). The Swap Agreement will result in effective fixed interest payments
equal  to the yield on U.S. Treasury Notes with a maturity of seven years plus a
spread which, if determined on the date hereof, would result in an interest rate
of 7.51%. The CMBS Offering is expected to require monthly payments of  interest
only  with  all principal  due in  a  balloon payment  at maturity.  The Company
expects to pursue the CMBS Offering promptly after the closing of this  Offering
and  the Formation  Transactions, although  there can  be no  assurance that the
Company will complete a CMBS Offering or enter into a Swap Agreement.
 
    THE CREDIT FACILITY.  The Company is currently negotiating with a commercial
bank, the terms of  a two-year, $100 million  revolving credit facility, with  a
one-year  extension option (the "Credit Facility").  The Credit Facility will be
used, among  other things,  to finance  the acquisition  of properties,  provide
funds  for tenant improvements and capital expenditures, and provide for working
capital and other  corporate purposes.  The Company  intends to  enter into  the
Credit  Facility  contemporaneously  with the  Offering  or  shortly thereafter,
although there can be no assurance that  the Company will enter into the  Credit
Facility.
 
                                  THE OFFERING
 
    All  of the shares of  Common Stock being offered  in the Offering are being
offered by the Company.
 
Common Stock Offered by the Company...    18,847,500 shares
 
Common Stock Outstanding After the
  Offering (1)........................    18,852,500 shares
 
Use of Proceeds.......................    Payments to certain Participants (not
                                          including Messrs. Ziman and Coleman
                                          who will not receive cash in the
                                          Formation Transactions) for their
                                          interests in the Arden Predecessors
                                          and in certain of the Properties,
                                          repayment of mortgage debt on the
                                          Properties, including accrued and
                                          additional interest on such mortgage
                                          debt, purchase of the Acquisition
                                          Properties, tenant improvements and
                                          capital expenditure reserves, and for
                                          working capital purposes. See "Use of
                                          Proceeds," "Capitalization," and
                                          "Management's Discussion and Analysis
                                          of Financial Condition and Results of
                                          Operations -- Liquidity and Capital
                                          Resources."
 
New York Stock Exchange Symbol........    "ARI"
 
- ------------------------
 
(1) Assumes no OP  Units are exchanged  for Common Stock. If  all OP Units  were
    exchanged for Common Stock, there would be 21,741,571 shares of Common Stock
    outstanding after the Offering.
 
                                       12
<PAGE>
                                 DISTRIBUTIONS
 
    The   Company  intends  to  make  regular  quarterly  distributions  to  its
stockholders. The Company intends to pay a PRO RATA distribution with respect to
the period commencing on the closing of the Offering and ending on December  31,
1996,  based upon $0.40  per share for  a full quarter.  On an annualized basis,
this would be $1.60 per share (of which $0.21 may represent a return of  capital
for  tax purposes), or an  annual distribution rate of  8%, based on the assumed
initial public offering price per share of $20.00. The Company intends initially
to distribute  annually  approximately 94.5%  of  estimated Cash  Available  for
Distribution.  The  Company established  this  distribution rate  based  upon an
estimate  of  Cash  Available  for  Distribution  that  will  be  available  for
distributions  after the Offering. See "Distributions" for information as to how
this  estimate  was  derived.  The  Company  intends  to  maintain  its  initial
distribution  rate  for the  twelve-month period  following consummation  of the
Offering unless  actual  results of  operations,  economic conditions  or  other
factors   differ  materially  from   the  assumptions  used   in  its  estimate.
Distributions by the Company  will be determined by  the Board of Directors  and
will  be  dependent upon  a number  of  factors. The  Company believes  that its
estimate of Cash Available for  Distribution constitutes a reasonable basis  for
setting  the initial distribution;  however, no assurance can  be given that the
estimate  will  prove  accurate,  and  actual  distributions  may  therefore  be
significantly  different from the expected  distributions. In addition, in order
to maintain its qualification as a REIT under the Code, the Company is  required
to  distribute currently  95% of  its taxable  income. See  "Distributions." The
Company does not  intend to reduce  the expected distribution  per share if  the
Underwriters' overallotment option is exercised.
 
                           TAX STATUS OF THE COMPANY
 
    The  Company  intends to  elect to  be taxed  as a  REIT under  Sections 856
through 860 of 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 taxable income 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. See
"Federal Income Tax Considerations" and "Risk Factors -- Adverse Consequences of
Failure to  Qualify as  a REIT;  Other  Tax Liabilities."  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.
 
                    SUMMARY SELECTED COMBINED FINANCIAL DATA
 
    The   following  sets  forth  selected   combined  financial  and  operating
information on a pro forma  basis for the Company  and on a combined  historical
basis  for the Arden  Predecessors. The following information  should be read in
conjunction with the financial statements and  notes thereto of the Company  and
of  the Arden Predecessors  included elsewhere in  this Prospectus. The selected
combined  historical   financial  and   operating  information   of  the   Arden
Predecessors at December 31, 1995 and 1994, and for the years ended December 31,
1995,  1994 and  1993, has been  derived from the  historical combined financial
statements audited by Ernst & Young LLP, independent auditors, whose report with
respect thereto is included elsewhere in this Prospectus. The selected  combined
financial  and operating information for the six  months ended June 30, 1996 and
June 30, 1995 has been derived from the unaudited combined financial  statements
of the Arden Predecessors included elsewhere in this Prospectus.
 
    The unaudited selected pro forma financial and operating information for the
six months ended June 30, 1996 and the year ended December 31, 1995 is presented
as  if the Offering,  the Formation Transactions (including  the purchase of the
Acquisition Properties), and the acquisitions of the Properties acquired  during
1996  prior to the Offering (the  "1996 Acquired Properties") and the Properties
acquired during 1995 (the "1995 Acquired  Properties") had all occurred by  June
30,  1996 for  the combined  balance sheet  and at  the beginning  of the period
presented for the combined statements of operations. The pro forma balance sheet
information also gives  effect to  the recording  of minority  interests for  OP
Units, as if
 
                                       13
<PAGE>
these   transactions  occurred  on  June  30,  1996.  The  pro  forma  financial
information is not necessarily indicative of what the actual financial  position
or  results of the Company would have been  as of and for the periods indicated,
nor does it  purport to  represent the  Company's future  financial position  or
results of operations.
 
                                       14
<PAGE>
                          THE COMPANY (PRO FORMA) AND
                    ARDEN PREDECESSORS (COMBINED HISTORICAL)
   
<TABLE>
<CAPTION>
                                              SIX MONTHS ENDED JUNE 30,
                                            ------------------------------
                                                             COMBINED
                                            PRO FORMA       HISTORICAL
                                            ---------   ------------------
                                              1996        1996      1995
                                            ---------   --------  --------
<S>                                         <C>         <C>       <C>
                                              (IN THOUSANDS, EXCEPT PER
                                                     SHARE DATA)
OPERATING DATA:
Revenue:
  Rental..................................   $33,493    $ 19,404  $  2,822
  Tenant reimbursements...................     2,049       1,425       177
  Parking.................................     3,090       2,121       220
  Other...................................     1,304       1,521       649
                                            ---------   --------  --------
    Total revenue.........................    39,936      24,471     3,868
 
EXPENSES:
  Property operating expenses.............    14,124       8,252       934
  General and administrative expenses.....     1,900         830       684
  Depreciation and amortization...........     5,774       3,036       638
  Interest expense........................     4,058      14,741     1,403
                                            ---------   --------  --------
    Total expenses........................    25,856      26,859     3,659
                                            ---------   --------  --------
Equity in net income (loss) of noncombined
  entities................................     --            (94)      108
                                            ---------   --------  --------
Income (loss) before minority interests...    14,080      (2,482)      317
Minority interests........................    (1,871)        344        (7)
                                            ---------   --------  --------
Net income (loss).........................   $12,209    $ (2,138) $    310
                                            ---------   --------  --------
                                            ---------   --------  --------
Net income per common share...............   $   .70
                                            ---------
                                            ---------
 
<CAPTION>
                                                            YEAR ENDED DECEMBER 31,
                                            -------------------------------------------------------
                                                                    COMBINED HISTORICAL
                                                        -------------------------------------------
                                                                                               THE
                                                                                              PERIOD
                                                                                              MARCH
                                                                                               22,
                                                                                              1991
                                            PRO FORMA                                          TO
                                            ---------                                         DECEMBER
                                              1995        1995       1994      1993    1992   31, 1991
                                            ---------   ---------  --------  --------  -----  -----
<S>                                         <C>         <C>        <C>       <C>       <C>    <C>
OPERATING DATA:
Revenue:
  Rental..................................   $66,691    $   8,832  $  5,157  $  3,034  $--    $--
  Tenant reimbursements...................     2,910          403       217        35   --    --
  Parking.................................     5,895          750       382       279   --    --
  Other...................................     2,440        1,707       796       314    324  11
                                            ---------   ---------  --------  --------  -----  -----
    Total revenue.........................    77,936       11,692     6,552     3,662    324  11
EXPENSES:
  Property operating expenses.............    30,091        3,339     2,191     1,480   --    --
  General and administrative expenses.....     3,800        1,377       689       386    471  7
  Depreciation and amortization...........    11,549        1,898     1,143       646      2  --
  Interest expense........................     8,076        5,537     1,673       499      9  --
                                            ---------   ---------  --------  --------  -----  -----
    Total expenses........................    53,516       12,151     5,696     3,011    482  7
                                            ---------   ---------  --------  --------  -----  -----
Equity in net income (loss) of noncombined
  entities................................     --            (116)      201         4   --    --
                                            ---------   ---------  --------  --------  -----  -----
Income (loss) before minority interests...    24,420         (575)    1,057       655   (158) 4
Minority interests........................    (3,245)          (1)        1     --      --    --
                                            ---------   ---------  --------  --------  -----  -----
Net income (loss).........................   $21,175    $    (576) $  1,058  $    655  $(158) $4
                                            ---------   ---------  --------  --------  -----  -----
                                            ---------   ---------  --------  --------  -----  -----
Net income per common share...............   $  1.23
                                            ---------
                                            ---------
</TABLE>
    
 
   
<TABLE>
<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>
                                                                         (IN THOUSANDS)
BALANCE SHEET DATA:
Commercial office properties -- net of
  accumulated depreciation...................  $410,160     $254,749    $160,874  $ 34,977  $25,404  $--    $--
Total assets.................................   436,581      286,165     182,379    46,090   27,911   134      10
Mortgage loans payable and unsecured lines of
  credit.....................................   104,000      265,959     168,451    32,944   24,356   250    --
Total liabilities............................   111,468      277,917     174,163    34,148   25,190   287       5
Minority interests...........................    43,231          718         100        99    --      --     --
Owners'/Stockholders' equity.................   281,882        7,530       8,116    11,843    2,721  (153)      5
</TABLE>
    
 
                                       15
<PAGE>
                          THE COMPANY (PRO FORMA) AND
                    ARDEN PREDECESSORS (COMBINED HISTORICAL)
   
<TABLE>
<CAPTION>
                                              SIX MONTHS ENDED JUNE 30,
                                            ------------------------------
                                                             COMBINED
                                            PRO FORMA       HISTORICAL
                                            ---------   ------------------
                                              1996        1996      1995
                                            ---------   --------  --------
<S>                                         <C>         <C>       <C>
                                              (IN THOUSANDS, EXCEPT PER
                                             SHARE DATA, PERCENTAGES AND
                                                NUMBER OF PROPERTIES)
OTHER DATA:
Funds from Operations (1):
  Income (loss) before minority
    interests.............................   $14,080    $ (2,482) $    317
  Depreciation and amortization...........     5,774       3,036       638
                                            ---------   --------  --------
  Funds from Operations...................    19,854         554       955
Company's Share Percentage................     86.69%
Company's Share of Funds from
  Operations..............................    17,211         554       955
                                            ---------   --------  --------
Cash flows from operating activities......     --          2,013       458
Cash flows from investing activities......     --        (96,827)   (5,578)
Cash flows from financing activities......     --         94,937     4,550
Number of Properties owned at period
  end.....................................        24          21        10
Gross rentable square feet of Properties
  owned at period end.....................     4,036       3,547     1,408
Occupancy at period end of Properties
  owned at period end.....................     --             89%       84%
 
<CAPTION>
                                                            YEAR ENDED DECEMBER 31,
                                            -------------------------------------------------------
                                                                    COMBINED HISTORICAL
                                                        -------------------------------------------
                                                                                               THE
                                                                                              PERIOD
                                                                                              MARCH
                                                                                               22,
                                                                                              1991
                                            PRO FORMA                                          TO
                                            ---------                                         DECEMBER
                                              1995        1995       1994      1993    1992   31, 1991
                                            ---------   ---------  --------  --------  -----  -----
<S>                                         <C>         <C>        <C>       <C>       <C>    <C>
 
OTHER DATA:
Funds from Operations (1):
  Income (loss) before minority
    interests.............................   $24,420    $    (575) $  1,057  $    655  $(158) $4
  Depreciation and amortization...........    11,549        1,898     1,143       646      2  --
                                            ---------   ---------  --------  --------  -----  -----
  Funds from Operations...................    35,969        1,323     2,200     1,301   (156) 4
Company's Share Percentage................
Company's Share of Funds from
  Operations..............................    31,182        1,323     2,200     1,301   (156) 4
                                            ---------   ---------  --------  --------  -----  -----
Cash flows from operating activities......     --           2,830       834     1,186   (258) 7
Cash flows from investing activities......     --        (123,358)  (17,921)  (25,965)  --    --
Cash flows from financing activities......     --         120,707    16,845    25,632    250  1
Number of Properties owned at period
  end.....................................        24           17         8         3   --    --
Gross rentable square feet of Properties
  owned at period end.....................     4,036        2,634     1,130       530   --    --
Occupancy at period end of Properties
  owned at period end.....................     --              88%       82%       84%  --    --
</TABLE>
    
 
- ---------------
(1)  The White Paper on Funds from Operations approved by the Board of Governors
    of the National Association of  Real Estate Investment Trusts ("NAREIT")  in
    March  1995 (the "White Paper") defines  Funds from Operations 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  and  after  adjustments  for  unconsolidated
    partnerships  and joint ventures. Management considers Funds from Operations
    an appropriate  measure of  performance  of an  equity  REIT because  it  is
    predicated on cash flow analyses. The Company computes Funds from Operations
    in accordance with standards established by the White Paper which may differ
    from the methodology for calculating Funds from Operations utilized by other
    equity  REITs and, accordingly,  may not be comparable  to such other REITs.
    Funds from Operations  should not  be considered  as an  alternative to  net
    income (determined in accordance with GAAP) as an indicator of the Company's
    financial  performance or to cash flow from operating activities (determined
    in accordance with GAAP) as a measure of the Company's liquidity, nor is  it
    indicative  of funds available  to fund the  Company's cash needs, including
    its ability to make distributions.
 
                                       16
<PAGE>
                                  RISK FACTORS
 
    An  investment  in  the  Common Stock  involves  various  risks. Prospective
investors should  carefully consider  the following  information in  conjunction
with the other information contained in this Prospectus before making a decision
to purchase Common Stock in the Offering.
 
PRICE TO BE PAID FOR PROPERTIES AND OTHER ASSETS MAY EXCEED THEIR FAIR MARKET
VALUE
 
    No  independent third-party valuations, appraisals or fairness opinions were
obtained  by  the  Company  in  connection  with  the  Formation   Transactions.
Accordingly,  there can be no assurance that the prices paid by the Company will
not exceed the fair market value of the interests in the Arden Predecessors, the
Properties and the other assets to be  acquired by the Company in the  Formation
Transactions.  The initial public offering price  has been determined by Messrs.
Ziman and Coleman and the Underwriters based upon a capitalization of  estimated
Cash  Available for Distribution and the  factors discussed under "Structure and
Formation of  the Company  -- The  Formation Transactions  -- Determination  and
Valuation   of  Ownership   Interests"  and   "Underwriting,"  rather   than  an
asset-by-asset valuation based on  historical cost or  current market value.  In
determining  the  initial  public offering  price  of the  Common  Stock certain
assumptions were made concerning the estimate of revenue to be derived from  the
Properties.   See  "Distributions."  This  methodology  has  been  used  because
management believes  it  is appropriate  to  value  the Company  as  an  ongoing
business,  rather  than with  a view  to values  that could  be obtained  from a
liquidation of the Company or of  individual assets owned by the Company.  There
can be no assurance that there will not be discrepancies between assumed results
and  actual  results which  could lead  to a  reduction in  actual distributions
compared to  assumed  distributions. It  is  possible that  the  initial  public
offering  price per share of  Common Stock may exceed  the per share fair market
value of the Company's assets.
 
FORMATION TRANSACTIONS NOT ARM'S LENGTH
 
    The Formation Transactions are not the result of arm's-length  negotiations.
The Participants (including Messrs. Ziman and Coleman, who are founders of Arden
and  the Arden Predecessors and  executive officers and members  of the Board of
Directors of the Company) have preexisting ownership interests in Arden and  the
Arden  Predecessors.  The  ownership  interests of  such  individuals  differ in
proportion and amount. Messrs.  Ziman and Coleman  have negotiated the  purchase
price for the assets to be acquired by the Company in the Formation Transactions
and  each of these  individuals will receive substantial  economic benefits as a
result of such  transactions. There  can be no  assurance that  the fair  market
value  of the Properties and the other assets to be acquired by the Company will
equal or exceed the sum of  the value of the OP  Units issued and the amount  of
cash paid to the Participants in the Formation Transactions.
 
   
RISK OF HIGH DISTRIBUTION PAYOUT PERCENTAGE
    
 
   
    The  Company's expected distributions  of $1.60 per share  for the 12 months
following the closing of the Offering are expected to be approximately 98.0%  of
estimated  cash available for distributions. If cash available for distributions
generated by the  Company's assets for  such 12-month period  are less than  the
Company's  estimate or  if such  cash available  for distributions  decreases in
future periods from current levels, the Company's ability to make  distributions
at  expected  levels  would be  adversely  affected.  Any such  failure  to make
expected distributions could  result in a  decrease in the  market price of  the
Common Stock.
    
 
REAL ESTATE FINANCING RISKS
 
    INABILITY TO REPAY OR REFINANCE INDEBTEDNESS AT MATURITY.  Upon consummation
of this Offering and the Formation Transactions, the Company will enter into the
one-year  interim Mortgage Financing  in the aggregate  principal amount of $104
million. The  Company  intends to  refinance  the Mortgage  Financing  prior  to
maturity  through the CMBS Offering. The Company also intends to enter into and,
over time,  make borrowings  under  the Credit  Facility.  The Company  will  be
subject  to 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 any indebtedness will  not be able to be
refinanced or that the terms of any such refinancing will not be as favorable as
the terms of such indebtedness.
 
    RISK OF FAILURE TO COVER DEBT SERVICE UNDER THE MORTGAGE FINANCING AND  CMBS
OFFERING.   Concurrently with  the Offering, the  Company, through the Operating
Partnership, will borrow approximately $104
 
                                       17
<PAGE>
million in  principal  amount  under  the  Mortgage  Financing  and  intends  to
refinance  the Mortgage Financing  prior to maturity  through the CMBS Offering.
The payment and  other obligations  under the  Mortgage Financing  will be  (and
under   the   CMBS   Offering   are   expected   to   be)   secured   by   fully
cross-collateralized and  cross-defaulted  first  mortgage  liens  on  the  nine
Mortgage  Financing  Properties.  The Mortgage  Financing  will  require monthly
payments of interest only,  with all principal due  on the first anniversary  of
the  Mortgage Financing. If the Company is  unable to meet its obligations under
the Mortgage  Financing (or  under the  CMBS Offering),  the Mortgage  Financing
Properties  securing  such  debt could  be  foreclosed  on, which  would  have a
material adverse  effect  on  the  Company and  its  ability  to  make  expected
distributions  and could  threaten the continued  viability of  the Company. See
"Policies With Respect to Certain Transactions -- Financing Policies."
 
    POTENTIAL EFFECT  OF  RISING  INTEREST  RATES  ON  COMPANY'S  VARIABLE  RATE
DEBT.   Upon  or shortly  after consummation of  the Offering  and the Formation
Transactions, the Company intends to enter into the proposed $100 million Credit
Facility.  See  "Policies  With  Respect  to  Certain  Activities  --  Financing
Policies."  Advances under the Credit Facility  will bear interest at a variable
rate. In addition, the Company may incur other variable rate indebtedness in the
future. Increases  in interest  rates on  such indebtedness  would increase  the
Company's  interest expense  (e.g., assuming  the entire  $100 million available
under the Credit Facility is outstanding, the Company would incur an  additional
$250,000  in interest expense for each  0.25% increase in interest rates), which
could adversely affect the Company's cash  flow and its ability to pay  expected
distributions to stockholders. In addition, although the Mortgage Financing (and
CMBS  Offering) will bear  interest at a  variable rate, the  Company expects to
enter into the Swap Agreement or other hedging transactions to further limit its
exposure to rising interest  rates as appropriate  and cost effective,  although
there  can be no assurance that it will be  able to do so on terms acceptable to
the Company. The Swap  Agreement or other hedging  transactions also may  expose
the  Company to  the risk that  the counter  party may not  perform, which could
cause the  Company  to  lose  the  benefits  of  the  hedging  transaction.  See
"Management's  Discussion  and Analysis  of Financial  Condition and  Results of
Operations -- Liquidity and Capital Resources."
 
NO LIMITATION ON DEBT
 
    Upon  completion  of  the  Offering  and  the  Formation  Transactions,  the
Company's  debt to total market capitalization ratio will be approximately 19.3%
(17.6% if  the Underwriters'  overallotment option  is exercised  in full).  The
Company  currently has a policy  of incurring debt only  if upon such incurrence
the debt to  total market capitalization  ratio would  be 50% or  less, but  the
organizational  documents of  the Company do  not contain any  limitation on the
amount of  indebtedness  the  Company  may  incur.  Accordingly,  the  Board  of
Directors could alter or eliminate this policy. 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,  consequently,
the  amount available  for distribution to  stockholders and  could increase the
risk of default on the Company's indebtedness.
 
    The Company has  established its debt  policy relative to  the total  market
capitalization  of the  Company rather  than relative to  the book  value of its
assets. 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
original cost of real property, the Company's primary tangible assets) does  not
accurately  reflect its ability to borrow and to meet debt service requirements.
The 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. The Company also will consider factors other
than 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 its properties upon refinancing and the
ability of particular  properties and the  Company as a  whole to generate  cash
flow to cover expected debt service.
 
REAL ESTATE INVESTMENT RISKS
 
    REAL  ESTATE  OWNERSHIP RISKS.   Real  property  investments are  subject to
varying degrees of risk.  The yields available from  equity investments in  real
estate  depend in  large part  on the  amount of  income generated  and expenses
incurred. If the Properties do not generate revenue sufficient to meet operating
 
                                       18
<PAGE>
expenses, including debt service,  tenant improvements, leasing commissions  and
other capital expenditures, the Company may have to borrow additional amounts to
cover  fixed costs and the Company's cash flow and ability to make distributions
to its stockholders will be adversely affected.
 
    The Company's  revenue and  the value  of its  properties may  be  adversely
affected  by a number  of factors, including the  national economic climate; the
local economic  climate;  local  real  estate  conditions;  the  perceptions  of
prospective  tenants of the  attractiveness of the property;  the ability of the
Company to manage and maintain the Properties and secure adequate insurance; and
increased operating  costs  (including  real estate  taxes  and  utilities).  In
addition,  real estate  values and income  from properties are  also affected by
such factors as applicable  laws, including tax laws,  interest rate levels  and
the availability of financing.
 
    RISK  THAT COMPANY MAY BE UNABLE TO  RETAIN TENANTS OR RENT SPACE UPON LEASE
EXPIRATIONS.  The  Company will be  subject to the  risks that upon  expiration,
leases may not be renewed, the space may not be relet or the terms of renewal or
reletting  (including the  cost of required  renovations) may  be less favorable
than current lease terms. Leases on a total of approximately 13% and 51% of  the
occupied  space in the Properties will expire  through the end of 1997 and 2000,
respectively. During 1997, the re-leasing  of the Company's expiring leases  may
result  in a  net decrease in  cash flow  from the leases  due to  the number of
leases expected to  expire during  such period  which are  above current  market
rents.  If the Company is unable to promptly  relet or renew leases for all or a
substantial portion of  this space,  if the rental  rates upon  such renewal  or
reletting  are significantly  lower than expected,  the Company's  cash flow and
ability to  make  expected  distributions to  stockholders  could  be  adversely
affected.
 
    RESTRAINTS  ON COMPANY'S FLEXIBILITY TO LIQUIDATE  REAL ESTATE.  Equity real
estate investments are relatively illiquid. Such illiquidity will tend to  limit
the ability of the Company to vary its portfolio promptly in response to changes
in  economic or other conditions. In addition,  the Code limits a REIT's ability
to sell  properties  held  for fewer  than  four  years, which  may  affect  the
Company's  ability  to sell  properties without  adversely affecting  returns to
holders of Common Stock.
 
    IMPACT OF  COMPETITION ON  OCCUPANCY  LEVELS AND  RENTS CHARGED.    Numerous
office  properties compete  with the Properties  in attracting  tenants to lease
space. Some of the competing properties may be newer, better located or owned by
parties  better  capitalized  than  the  Company.  The  number  of   competitive
commercial  properties in a particular area could have a material adverse effect
on (i) the ability  to lease space  in the Properties (or  at newly acquired  or
developed properties) and (ii) the rents charged.
 
    POTENTIAL   INCREASES   IN   CERTAIN   TAXES   AND   REGULATORY   COMPLIANCE
COSTS.  Because increases in income, service or transfer taxes are generally not
passed through to tenants under leases, such increases may adversely affect  the
Company's  cash flow and its ability  to make distributions to stockholders. The
Properties are  also subject  to  various federal,  state and  local  regulatory
requirements,  such as requirements of the  Americans with Disabilities Act (the
"ADA") and 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 substantial 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 cash flow and expected distributions.
 
    IMPACT OF  FINANCIAL CONDITION  AND SOLVENCY  OF TENANTS  ON COMPANY'S  CASH
FLOW.   At  any time,  a tenant  of the  Properties may  seek the  protection of
bankruptcy laws,  which  could  result  in rejection  and  termination  of  such
tenant's  lease  and  thereby  cause  a reduction  in  cash  flow  available for
distribution by the Company. Although  the Company has not experienced  material
losses from tenant bankruptcies, no assurance can be given that tenants will not
file  for bankruptcy protection in the future or, if any tenants file, that they
will affirm  their leases  and continue  to  make rental  payments in  a  timely
manner. In addition, a tenant from time to time may experience a downturn in its
business  which may weaken its financial condition  and result in the failure to
make rental  payments when  due. If  tenant leases  are not  affirmed  following
bankruptcy  or if a  tenant's financial condition  weakens, the Company's income
may be adversely affected.
 
                                       19
<PAGE>
    AMERICANS WITH DISABILITIES ACT COMPLIANCE COSTS.  Under the ADA, all public
accommodations and commercial  facilities are required  to meet certain  federal
requirements  related to access and use  by disabled persons. These requirements
became effective in  1992. Compliance  with the ADA  requirements could  require
removal  of access  barriers and  non-compliance could  result in  imposition of
fines by  the U.S.  government or  an  award of  damages to  private  litigants.
Although   the  Company  believes  that  the  Properties  are  substantially  in
compliance with these requirements,  the Company may  incur additional costs  to
comply with the ADA. Although the Company believes that such costs will not have
a material adverse effect on the Company, if required changes involved a greater
expenditure  than the  Company currently  anticipates, the  Company's ability to
make expected distributions could be adversely affected.
 
    FINANCIAL DEPENDENCY AND  MANAGEMENT CONFLICTS  ASSOCIATED WITH  PARTNERSHIP
AND  JOINT  VENTURE PROPERTY  OWNERSHIP STRUCTURES.   The  Company will  own its
interests in the Properties through the Operating Partnership. In addition,  the
Company  may also participate with other  entities in property ownership through
joint ventures or partnerships in the  future. While the Company currently  does
not  have any plans to invest in  joint ventures or partnerships with affiliates
or promoters of the Company, Mr. Arthur Gilbert, a director of the Company, owns
one office  property  in  Southern  California that  the  Company  may  consider
acquiring  in the  future. 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 Company's  instructions or requests 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.
 
CONCENTRATION OF PROPERTIES IN SOUTHERN CALIFORNIA
 
    All  of the Company's Properties are located in Southern California, with 21
of the 24 Properties located in suburban Los Angeles County. Los Angeles  County
just  recently  began  to  recover from  an  economic  recession  which affected
Southern California generally  and Los  Angeles County in  particular since  the
early  1990s.  The Company's  revenue and  the  value of  its Properties  may be
affected by a number of factors, including the local economic climate (which may
be adversely impacted  by business  layoffs or  downsizing, industry  slowdowns,
changing  demographics and other factors) and local real estate conditions (such
as oversupply of  or reduced demand  for office and  other competing  commercial
properties).  Therefore,  the  Company's  performance and  its  ability  to make
distributions to stockholders will  likely be dependent, to  a large extent,  on
the economic conditions in this market area.
 
CONFLICTS OF INTERESTS IN THE FORMATION TRANSACTIONS AND THE BUSINESS OF THE
COMPANY
 
    BENEFITS  FROM FORMATION TRANSACTIONS.   Participants receiving  OP Units in
the Formation  Transactions  (including  Messrs.  Ziman  and  Coleman,  who  are
executive  officers and directors of the Company, and Mr. Arthur Gilbert, who is
a director nominee of  the Company, and  Ms. Michele Byer,  who is an  executive
officer  of  the  Company), will  realize  certain benefits  from  the Formation
Transactions that will not generally be received by other persons  participating
in  the  formation  of  the  Company,  including  receipt  of  an  aggregate  of
approximately 2,740,718  OP  Units, and  options  to purchase  an  aggregate  of
690,000 shares of Common Stock under the Stock Incentive Plan. Messrs. Ziman and
Coleman  will  beneficially  own,  directly  or  indirectly  through  affiliates
(including Arden), 2,185,229  OP Units (representing  an 10.05% limited  partner
interest in the Operating Partnership) in exchange for the transfer of interests
and  assets  having  an aggregate  book  value  of approximately  $2,000  to the
Operating Partnership by Messrs. Ziman  and Coleman. In addition, Messrs.  Ziman
and  Coleman  will  enter  into  employment  agreements  with  the  Company. See
"Structure  and  Formation  of  the   Company  --  Benefits  of  the   Formation
Transactions  and the Offering to Affiliates  of the Company" and "Management --
Employment Agreements." Because these persons  were involved in structuring  the
Formation  Transactions, they had the ability to influence the type and level of
benefits they received. As such, these persons may have interests that  conflict
with the interests of others
 
                                       20
<PAGE>
participating  in the Formation  Transactions and with  the interests of persons
acquiring Common Stock  in the  Offering. As  a result,  the type  and level  of
benefits  these  persons  received  may  have been  different  if  they  had not
participated in structuring the Formation Transactions.
 
    REPAYMENT OF CERTAIN DEBT.  After giving effect to its participation in  the
Mortgage  Financing,  Lehman  Brothers  Holdings Inc.,  an  affiliate  of Lehman
Brothers Inc., the lead  managing underwriter for the  Offering (which has  also
provided  financial advisory services to the Company in respect of the Formation
Transactions and the Offering), will receive a net amount of approximately  $202
million  of the net  proceeds of the  Offering as repayment  of indebtedness and
related  additional  and  accrued  interest  expected  to  be  outstanding  upon
consummation of the Offering. See "Underwriting."
 
    FAILURE  TO ENFORCE TERMS OF FORMATION  AGREEMENTS.  As partners and members
in the Arden Predecessors  (which have owned the  Properties), owners of  Arden,
and  recipients  of cash  and OP  Units in  the Formation  Transactions, certain
members of the Company management, including Messrs. Ziman, Coleman and  Gilbert
and Ms. Byer, will have a conflict of interest with respect to their obligations
as  directors  or  executive officers  of  the  Company in  enforcing  the terms
(including  customary  representations  and  warranties  as  to  ownership   and
operation)  of the agreements relating  to the transfer to  the Company of their
interests in the  Properties and the  Arden assets. The  failure to enforce  the
material  terms of those agreements, particularly the indemnification provisions
for breaches of representations and warranties, could result in a monetary  loss
to the Company, which loss could have a material adverse effect on the Company's
financial  condition  or  results  of  operations.  In  addition,  the aggregate
liability of  Messrs. Ziman  and Coleman  and Arden  under those  agreements  is
limited  to  approximately $43.7  million  (the initial  value  of the  OP Units
received by them  in the  Formation Transactions  based on  the assumed  initial
offering  price of  the Common  Stock offered  hereby), and  each such  party is
severally liable, up  to the  initial value  of the  OP Units  received by  such
party,  only  for  breaches  of  such  party's  respective  representations  and
warranties. The  Company therefore  will have  no right  of recovery  as to  any
damages  in excess of such aggregate or  individual amounts that may result from
breaches of such representations and warranties.
 
    TAX CONSEQUENCES UPON ANY PREPAYMENT OF MORTGAGE FINANCING.  Certain Limited
Partners, including Messrs. Ziman, Coleman and  Gilbert and Ms. Byer, may  incur
adverse tax consequences upon the repayment of mortgage indebtedness relating to
the  Mortgage Financing Properties which are different from the tax consequences
to the Company and persons who purchase shares of Common Stock in the  Offering.
Consequently,  such Limited Partners may have different objectives regarding the
appropriate timing  of any  such  repayment. While  the  Company will  have  the
exclusive  authority under the Partnership Agreement to determine whether, when,
and on what terms to repay  such mortgage indebtedness, any such decision  would
require  the  approval of  the Board  of Directors.  Messrs. Ziman,  Coleman and
Gilbert and Ms. Byer  will have substantial influence  with respect to any  such
decision,  and such influence could be exercised in a manner not consistent with
the interests of some, or a majority, of the Company's stockholders including in
a manner which could prevent repayment of such mortgage indebtedness.
 
    LIMITATION UPON SALE  OR REFINANCING  OF CENTURY PARK  CENTER.   Due to  the
potential adverse consequences to certain Limited Partners which may result from
a  sale  of Century  Park  Center, for  a period  of  seven years  following the
Offering, any sale  of Century Park  Center (other than  in connection with  the
sale of all or substantially all of the assets of the Company or a merger of the
Company)  requires the consent of a majority  of the Limited Partners, which may
cause the Company to be unable to  sell this Property in circumstances in  which
it would be advantageous to do so.
 
    OTHER  REAL  ESTATE  INTERESTS.   Messrs.  Ziman, Coleman  and  Gilbert hold
certain real estate interests which are not being contributed to the Company  as
part  of  the  Formation Transactions.  Except  for  one property  owned  by Mr.
Gilbert, none of such real estate interests relate to properties that are office
properties. Subsequent to  the consummation  of this Offering,  the Company  may
consider the acquisition of the office property owned by Mr. Gilbert.
 
                                       21
<PAGE>
RISKS ASSOCIATED WITH THE RECENT ACQUISITION OF MANY OF THE NEW PROPERTIES; LACK
OF OPERATING HISTORY
 
    After  giving effect to the Formation  Transactions, the Company will own 24
Properties, consisting of approximately 4.0 million rentable square feet. All of
the Properties have been under the Company's management for 3 1/2 years or  less
and  a majority  of the Properties  have been owned  for less than  one year (11
Properties) or will be acquired at the closing of this Offering (2  Properties).
The  most  recently  acquired  of the  Properties  may  have  characteristics or
deficiencies unknown  to  the  Company  affecting  their  valuation  or  revenue
potential,  and it is also  possible that the operating  performance of the most
recently acquired Properties may decline under the Company's management.
 
    The Company  is currently  experiencing a  period of  rapid growth.  As  the
Company  acquires additional  properties, the Company  will be  subject to risks
associated  with  managing  new   properties,  including  lease-up  and   tenant
retention.  In addition, the Company's ability  to manage its growth effectively
will require it to successfully integrate its new acquisitions into its existing
management structure. No assurances can be  given that the Company will be  able
to  succeed with such integration or effectively manage additional properties or
that newly acquired properties will perform as expected.
 
POTENTIAL RISKS REGARDING INABILITY TO OBTAIN CHANGE-OF-CONTROL CONSENTS ON
GROUND LEASES
 
    Three of  the  Company's properties  (4811  Airport Plaza  Drive,  4900/4910
Airport  Plaza Drive and 5000 East Spring) are subject to ground leases with the
City of Long  Beach. These ground  leases contain consent  provisions which  are
triggered  by the Formation Transactions. Under  the leases, the consents cannot
be unreasonably withheld. The city  attorney and the city  staff of the City  of
Long Beach have advised the Company in writing that they will recommend that the
City  Council of the City of Long  Beach approve the necessary consents at their
next regular meeting which  will occur on October  8, 1996. The Company's  title
insurance  companies have agreed  to cover the  risk if the  City Council should
fail to  approve  the consents  and  such failure  is  upheld in  litigation  as
reasonable. Nevertheless, if the City Council should not approve the consent and
should  prevail in court regarding the  reasonableness of withholding consent in
light of the recommendation of the city  attorney and the city staff and if  the
title  insurance companies prove unable  to make the Company  whole on the risk,
then the  Company's  results of  operations  and financial  condition  could  be
materially and adversely affected.
 
CHANGES IN POLICIES WITHOUT STOCKHOLDER APPROVAL
 
    The  investment,  financing,  borrowing  and  distribution  policies  of the
Company and its policies with respect to all other activities, including growth,
debt, capitalization  and  operations,  will  be  determined  by  the  Board  of
Directors.  Although the Board of  Directors has no present  intention to do so,
these policies may be amended  or revised at any time  and from time to time  at
the  discretion of the Board of Directors  without a vote of the stockholders of
the Company.  In addition,  the  Board of  Directors  may change  the  Company's
policies  with respect to  conflicts of interest provided  that such changes are
consistent with applicable legal requirements. A change in these policies  could
adversely affect the Company's financial condition, results of operations or the
market  price  of  the  Common  Stock. See  "Policies  with  Respect  to Certain
Transactions."
 
RISK OF ACQUISITION, RENOVATION AND DEVELOPMENT ACTIVITIES
 
    The Company intends to continue  acquiring office properties. See  "Business
and Growth Strategies -- Business Strategies." Acquisitions of office properties
entail   risks  that  investments  will  fail  to  perform  in  accordance  with
expectations. Estimates of renovation costs  and 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.
 
    The  Company intends to  expand and/or renovate its  Properties from time to
time. Expansion and renovation projects generally require expenditure of capital
as well as various government and  other approvals, the receipt of which  cannot
be  assured. While policies with respect  to expansion and renovation activities
are intended  to  limit  some  of  the  risks  otherwise  associated  with  such
activities,  the  Company  will  nevertheless  incur  certain  risks,  including
expenditures of funds on, and devotion  of management's time to, projects  which
may not be completed.
 
                                       22
<PAGE>
    The  Company anticipates  that future  acquisitions and  renovations will be
financed through  a combination  of advances  under the  Credit Facility,  other
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.
 
    While  the  Company  has  generally  limited  its  acquisition,  renovation,
management and leasing business primarily to the Southern California market,  it
is  possible that  the Company  will in  the future  expand its  business to new
geographic markets. The  Company will not  initially possess the  same level  of
familiarity  with  new  markets  outside  of  Southern  California,  which could
adversely affect its ability to acquire, develop, manage or lease properties  in
any new localities.
 
    Changing  market conditions, including competition  from other purchasers of
Class A suburban office properties, may diminish the Company's opportunities for
attractive additional acquisitions.
 
    The Company also  intends to  review from time  to time  the possibility  of
developing  and constructing office buildings and other commercial properties in
accordance  with  the  Company's  development  and  underwriting  policies.  See
"Business  and Growth Strategies --  Business Strategies." Risks associated with
the Company's development and  construction activities may include:  abandonment
of  development  opportunities;  construction  costs  of  a  property  exceeding
original estimates, possibly making  the property uneconomical; occupancy  rates
and  rents  at a  newly completed  property may  not be  sufficient to  make the
property profitable;  financing may  not  be available  on favorable  terms  for
development of a property; and construction and lease-up may not be completed on
schedule, resulting in increased debt service expense and construction costs. In
addition,   new  development  activities,  regardless   of  whether  they  would
ultimately  be   successful,  typically   require  a   substantial  portion   of
management's time and attention. Development activities would also be 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.
 
ADVERSE CONSEQUENCES OF FAILURE TO QUALIFY AS A REIT; OTHER TAX LIABILITIES
 
    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 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 (excluding 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,  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 Considerations  -- Taxation of the Company."  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
IRS or any court.
 
    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.
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 was  lost. This  treatment
would   significantly  reduce  the   net  earnings  of   the  Company  available
 
                                       23
<PAGE>
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
Considerations -- 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.  If  the  Company  has  net  income  from  a   prohibited
transaction,  such income will be subject to a 100% tax. See "Federal Income Tax
Considerations."
 
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  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 REIT asset tests  and possibly the income tests (as
set forth in the Code) and, in  turn, would prevent the Company from  qualifying
as  a REIT. The imposition of a corporate tax on the Operating Partnership would
also reduce the amount of cash available for distribution to the Company and its
stockholders. See  "Federal Income  Tax  Considerations --  Tax Aspects  of  the
Operating Partnership."
 
INSURANCE
 
    The  Operating Partnership  carries comprehensive  liability, fire, extended
coverage and rental loss insurance covering  all of the Properties, with  policy
specifications  and insured limits  which the Company  believes are adequate and
appropriate under  the circumstances.  The  Operating Partnership  also  carries
earthquake insurance on all of the Properties. There are, however, certain types
of losses that are not generally insured because it is not economically feasible
to  insure against such losses. Should an uninsured  loss or a loss in excess of
insured limits occur, the Operating Partnership could lose its capital  invested
in  the property, as  well as the  anticipated future revenue  from the property
and, in the case of  debt which is with  recourse to the Operating  Partnership,
would  remain obligated  for any  mortgage debt  or other  financial obligations
related to  the property.  Any such  loss would  adversely affect  the  Company.
Moreover,  as a general  partner of the Operating  Partnership, the Company will
generally be  liable for  any unsatisfied  obligations other  than  non-recourse
obligations. The Company believes that the Properties are adequately insured. In
addition,  in light of the California earthquake risk, California building codes
since the early  1970's have  established construction standards  for all  newly
built  and  renovated buildings,  including  office buildings,  the  current and
strictest construction  standards  having  been  adopted  in  1984.  Of  the  24
Properties,  13 have been built  since January 1, 1985  and the Company believes
that all  of  the  Properties  were constructed  in  full  compliance  with  the
applicable  standards existing  at the  time of  construction. While earthquakes
have occurred in Southern California, the only loss the Company has  experienced
as a result of earthquakes was minor damage to three of its buildings due to the
Northridge  earthquake, which resulted  in $601,000 of damage  in the year ended
December 31, 1994. No assurance can be  given that material losses in excess  of
insurance proceeds will not occur in the future.
 
DEPENDENCE ON KEY PERSONNEL
 
    The  Company  is  dependent  on  the  efforts  of  its  executive  officers,
particularly Messrs. Ziman and Coleman. The loss of their services could have  a
material  adverse  effect  on  the  operations  of  the  Company.  Prior  to the
consummation of the Offering, each of Messrs. Ziman and Coleman will enter  into
an  employment  agreement  with  the  Company.  See  "Management  --  Employment
Agreements."
 
LIMITS ON CHANGES IN CONTROL
 
    Certain provisions of the Charter and  bylaws of the Company (the  "Bylaws")
may  have the  effect of  delaying, deferring or  preventing a  third party from
making an acquisition proposal for the Company and may thereby inhibit a  change
in  control of the  Company. For example,  such provisions may  (i) deter tender
offers for the Common Stock, which offers may be attractive to the stockholders,
or (ii) deter purchases of
 
                                       24
<PAGE>
large blocks of Common Stock, thereby limiting the opportunity for  stockholders
to  receive a premium for their Common Stock over then-prevailing market prices.
See "Capital Stock" and  "Certain Provisions of Maryland  Law and the  Company's
Charter and Bylaws." These provisions include the following:
 
    LIMITS  ON OWNERSHIP OF COMMON STOCK.   In order for the Company to maintain
its qualification as  a REIT,  not more  than 50%  in value  of the  outstanding
shares  of Common Stock of the Company 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). 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  Considerations --  Taxation of  the Company."  In order  to
protect  the  Company  against  the  risk  of  losing  REIT  status  due  to the
concentration of ownership among its stockholders, the Ownership Limit  included
in the Charter limits actual or constructive ownership of the outstanding shares
of  Common Stock  by any  single stockholder to  9.0% of  the total  of the then
outstanding shares  of  Common Stock.  See  "Capital Stock  --  Restrictions  on
Transfer."  Although the Board of Directors  presently has no intention of doing
so (except  as  described  below),  the Board  of  Directors  could  waive  this
restriction with respect to a particular stockholder if it were satisfied, based
upon  the advice of tax counsel, 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. Actual  or constructive ownership of  shares of Common Stock  in
excess  of the Ownership 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 and such shares will be automatically transferred
to a  trust  for  the  benefit of  a  qualified  charitable  organization.  Such
transferee  or owner shall have  no right to vote such  shares or be entitled to
dividends or  other distributions  with respect  to such  shares. The  Board  of
Directors  has waived the Ownership Limit with  respect to Mr. Ziman and certain
family members  and  affiliates  and  permitted such  parties  to  actually  and
constructively  own up to 13.0%  of the outstanding shares  of Common Stock. See
"Capital Stock -- Restrictions on Transfer" for additional information regarding
the Ownership Limit.
 
    PREFERRED STOCK.  The Charter authorizes the Board of Directors to cause the
Company to issue  authorized but unissued  shares of Common  Stock or  Preferred
Stock  and to  classify or  reclassify any  unissued shares  of Common  Stock or
Preferred Stock  and to  set the  preferences, rights  and other  terms of  such
classified  or  unclassified shares.  See  "Capital Stock  --  Preferred Stock."
Although the Board of Directors  has no such intention  at the present time,  it
could  establish a series of Preferred Stock  that could, depending on the terms
of such series, 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 the stockholders.
 
    STAGGERED  BOARD.   The Company's Board  of Directors is  divided into three
classes of directors. The initial terms  of the first, second and third  classes
will  expire in 1997, 1998 and  1999, respectively. Beginning in 1997, directors
of each class will be chosen for  three-year terms upon the expiration of  their
current  terms  and each  year one  class of  directors will  be elected  by the
stockholders. The staggered terms of directors  may reduce the possibility of  a
tender offer or an attempt to change control of the Company even though a tender
offer  or change in control  might be in the  best interest of the stockholders.
See "Certain Provisions of Maryland Law and the Company's Charter and Bylaws  --
Board of Directors - Number, Classification, Vacancies."
 
HISTORICAL LOSSES
 
    The  Arden Predecessors had a combined  historical net loss of approximately
$2.1 million for the six months  ended June 30, 1996 and approximately  $576,000
for  the year ended December 31, 1995.  These net losses reflect the substantial
interest expense associated with the acquisition financing of the Properties and
certain non-cash charges  such as depreciation  and amortization. See  "Selected
Combined Financial Data"
 
                                       25
<PAGE>
and the financial statements and accompanying notes included in this Prospectus.
These  historical results may not be  indicative of future results. Nonetheless,
there can be  no assurance that  the Company will  not incur net  losses in  the
future.
 
POSSIBLE ENVIRONMENTAL LIABILITIES
 
    Under  various federal, state  and local environmental  laws, ordinances and
regulations, a  current or  previous owner  or operator  of real  estate may  be
required  to investigate and clean up hazardous or toxic substances or petroleum
product releases  at such  property and  may be  held liable  to a  governmental
entity  or  to  third parties  for  property  damage and  for  investigation and
clean-up costs incurred by  such parties in  connection with the  contamination.
Such  laws typically impose clean-up responsibility and liability without regard
to whether the owner knew of or caused the presence of the contaminants, and the
liability under such laws  has been interpreted to  be joint and several  unless
the  harm  is  divisible and  there  is  a reasonable  basis  for  allocation of
responsibility. The  costs  of investigation,  remediation  or removal  of  such
substances  may  be substantial,  and the  presence of  such substances,  or the
failure properly to remediate the contamination on such property, may  adversely
affect the owner's ability to sell or rent such property or to borrow using such
property  as collateral.  Persons who arrange  for the disposal  or treatment of
hazardous or toxic substances  at a disposal or  treatment facility also may  be
liable  for the  costs of removal  or remediation  of a release  of hazardous or
toxic substances at  such disposal or  treatment facility, whether  or not  such
facility  is owned or  operated by such person.  In addition, some environmental
laws create a  lien on  the contaminated  site in  favor of  the government  for
damages  and costs incurred  in connection with  the contamination. Finally, the
owner of a site may  be subject to common law  claims by third parties based  on
damages and costs resulting from environmental contamination emanating from such
site.
 
    Certain federal, state and local laws, regulations and ordinances govern the
removal,  encapsulation or disturbance  of asbestos-containing materials ("ACM")
when such  materials are  in poor  condition or  in the  event of  construction,
remodeling,  renovation  or  demolition  of a  building.  Such  laws  may impose
liability for release of ACM and may provide for third parties to seek  recovery
from  owners or operators of real properties for personal injury associated with
ACM. In  connection with  its ownership  and operation  of the  Properties,  the
Company  may be potentially liable for such costs. ACM has been detected through
sampling by environmental consultants at 70 South Lake, 16000 Ventura  Boulevard
and 9665 Wilshire. The non-friable ACM was found in certain floor tiles and pipe
wrappings at 16000 Ventura Boulevard and 70 South Lake and in vinyl floor tiles,
carpet  mastic,  drywall mud/tape,  textured  ceiling material,  core insulation
material and fireproofing at 9665 Wilshire.  The non-friable ACM found at  these
Properties  is not  expected to  present a risk  as long  as it  continues to be
properly managed.  The  environmental  consultants recommended  no  further  ACM
sampling or removal action at any of the Properties.
 
    In  the past two years, independent environmental consultants have conducted
or updated  Phase I  Environmental Assessments  ("Phase I  Assessments") at  the
Properties.  These  Phase I  Assessments have  included,  among other  things, a
visual inspection of  the Properties and  the surrounding area  and a review  of
relevant state, federal and historical documents. No invasive techniques such as
soil or groundwater sampling were performed.
 
    The  Company's Phase I  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.
Nevertheless,  it  is possible  that the  Company's Phase  I 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.
 
    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, except as noted
above. The Company has not been  notified by any governmental authority, and  is
 
                                       26
<PAGE>
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, other than as noted above.
 
EFFECT ON COMMON STOCK PRICE OF SHARES AVAILABLE FOR FUTURE SALE
 
    Sales of a substantial number of  shares of Common Stock, or the  perception
that  such sales could occur, could adversely affect prevailing market prices of
the Common Stock. In connection with the formation of the Company, 2,889,071  OP
Units,  in addition to Common Stock sold by the Company in the Offering, will be
issued. See "Structure and Formation of the Company." Messrs. Ziman and  Coleman
have  agreed to certain restrictions on the dispositions of the shares of Common
Stock  issued  upon  exchange  of  OP  Units.  See  "Underwriting."  When   such
restrictions  lapse, Common Stock  issued upon the  exchange of OP  Units may be
sold in the public market pursuant  to registration rights that the Company  has
granted  to  the  Participants  or available  exemptions  from  registration. In
addition, 1,500,000  shares  of  Common  Stock will  be  reserved  for  issuance
pursuant  to  the  Company's Stock  Incentive  Plan,  and these  shares  will be
available for  sale  in  the  public  markets from  time  to  time  pursuant  to
exemptions  from  registration  requirements or  upon  registration.  Options to
purchase a total of  868,500 shares of  Common Stock will  be granted and  stock
bonus  awards for a total of 5,000 shares have been granted to certain executive
officers, employees  and  directors  upon  the  closing  of  the  Offering.  See
"Management  -- Compensation of Directors,"  "-- Executive Compensation" and "--
Stock Incentive Plan." No  prediction can be made  about the effect that  future
sales of Common Stock will have on the market prices of shares.
 
EFFECT ON HOLDERS OF COMMON STOCK OF AN ISSUANCE OF PREFERRED STOCK
 
    The  Board of Directors  is empowered by the  Company's Charter to designate
and issue from time  to time one  or more classes or  series of Preferred  Stock
without  stockholder approval. The Board of Directors may determine the relative
rights, preferences and privileges of each class or series of Preferred Stock so
issued. See "Capital Stock -- Preferred  Stock." Because the Board of  Directors
has the power to establish the preferences and rights of each class or series of
Preferred  Stock, it may afford the holders  in any series or class of Preferred
Stock preferences, distributions, powers and rights, voting or otherwise, senior
to the rights of holders of Common Stock. The issuance of Preferred Stock  could
also have the effect of delaying, deferring or preventing a change in control of
the Company. See "-- Limits on Changes in Control."
 
IMMEDIATE AND SUBSTANTIAL DILUTION
 
    As  set forth more fully  under "Dilution," the pro  forma net tangible book
value per  share  of the  assets  of the  Company  after the  Offering  will  be
substantially  less  than the  initial public  offering price  per share  in the
Offering. Accordingly,  purchasers  of  the Common  Stock  offered  hereby  will
experience  immediate and  substantial dilution  of $5.24  per share  in the net
tangible book value of the Common Stock from the initial public offering  price.
See "Dilution."
 
ABSENCE OF PRIOR PUBLIC MARKET FOR COMMON STOCK
 
    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 or  be
sustained  or that shares of Common Stock will be resold at or above the initial
public offering price. The initial public offering price of the Common Stock has
been determined by agreement among the Company and the Underwriters and may  not
be  indicative of the market price for  the Common Stock after the Offering. See
"Underwriting." The  market value  of the  Common Stock  could be  substantially
affected  by  general market  conditions, including  changes in  interest rates.
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.
 
INFLUENCE OF EXECUTIVE OFFICERS, DIRECTORS AND PRINCIPAL STOCKHOLDERS
 
    Upon completion of the Offering, all directors and executive officers of the
Company as  a group  will beneficially  own approximately  94% of  the OP  Units
which,  commencing  one  year  after  consummation  of  the  Offering,  will  be
redeemable by the holder for cash or, at the option of the Company, exchangeable
for shares of Common Stock on a one-for-one basis. Assuming the exchange of  all
of  these  OP Units  for shares  of  Common Stock,  all directors  and executive
officers as a group would beneficially own approximately
 
                                       27
<PAGE>
12.61% of the total issued and outstanding shares. Mr. Ziman currently serves as
Chairman and Chief Executive  Officer and will be,  along with Mr. Coleman,  who
currently  serves as President  and Chief Operating Officer,  and Mr. Gilbert (a
director nominee) on the initial Board of Directors of the Company. Accordingly,
such persons will  have substantial  influence on the  Company, which  influence
might not be consistent with the interests of other stockholders, and may in the
future  have a substantial influence on the  outcome of any matters submitted to
the Company's stockholders for approval if  all of their OP Units are  exchanged
for  Common  Stock.  In  addition,  although  there  is  no  current  agreement,
understanding or arrangement for those Participants who received OP Units to act
together on any  matter, the  Participants could be  in a  position to  exercise
significant  influence  over the  affairs of  the  Company if  they were  to act
together in the future. See "Principal Stockholders."
 
RISKS OF FEE MANAGEMENT BUSINESS
 
    The  Company,  through   the  Operating  Partnership,   intends  to   pursue
selectively   the  management  of  properties  owned  by  third  parties.  Risks
associated with the management and leasing of properties owned by third  parties
include  the risk that the management and leasing contracts (which are typically
cancelable upon 15 to 60 days' notice or upon certain events, including sale  of
the  property)  will be  terminated by  the property  owner or  will be  lost in
connection with a sale of such property, that contracts may not be renewed  upon
expiration or may not be renewed on terms consistent with current terms and that
the  rental  revenues upon  which  management and  leasing  fees are  based will
decline as a result of general real estate market conditions or specific  market
factors  affecting properties  managed or  leased by  the Operating Partnership,
resulting in decreased management or leasing fee income.
 
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 distribution rate on the shares. Increasing
market  interest rates  may lead prospective  purchasers of the  Common Stock to
demand a  higher annual  distribution rate  from future  distributions. Such  an
increase in the required distribution rate may adversely affect the market price
of the Common Stock.
 
                                       28
<PAGE>
                                  THE COMPANY
 
    The  Company has been formed to continue and expand the real estate business
of Arden  and  the  other  Arden  Predecessors  which  are  engaged  in  owning,
acquiring,  managing,  leasing  and  renovating  office  properties  in Southern
California. The  Company's founders,  Richard S.  Ziman and  Victor J.  Coleman,
along  with the other  five senior officers  at the Company,  have an average of
more than 18 years of experience in the real estate industry. Upon completion of
the Offering,  the Company  will  own 24  office properties  (the  "Properties")
containing approximately 4.0 million rentable square feet. All of the Properties
are  located in Southern California, with 21 in suburban Los Angeles County, two
in Orange  County and  one  in San  Diego  County. As  of  August 1,  1996,  the
Properties  had a  weighted average occupancy  rate of  approximately 89%. Arden
currently manages 22  of the Properties.  Upon completion of  the Offering,  the
Company  will  manage  all  of the  Properties  and  four  additional properties
containing approximately  325,000  rentable  square  feet  which  are  currently
managed  by Arden for institutional investors  and other third-party owners. The
Company will  be a  fully integrated,  self-administered and  self-managed  real
estate company and expects to qualify as a REIT for federal income tax purposes.
 
   
    The  Company  believes that  all  of the  Properties  are located  in strong
submarkets which  generally  have  significant  rent  growth  potential  due  to
employment  growth, declining  vacancy rates, limited  new construction activity
and existing rental rates at levels  significantly below those required to  make
new  construction economically  feasible. The  Company's portfolio  is comprised
primarily of Class A suburban office properties, as defined by the Company  (and
not  an  independent  third  party). The  Company  generally  considers  Class A
suburban office properties to be those  which have desirable locations and  high
quality finishes, are well maintained and professionally managed and are capable
of  achieving  rental  and  occupancy  rates  which  are  typically  above those
prevailing in their respective markets  although the determination of an  office
property's  class designation is  subjective and consequently  others may have a
different view. Of the  Company's 24 Properties, 20  Properties have been  built
since  1980 and 14 Properties, including all four built prior to 1980, have been
substantially renovated within the last  three years. The Properties are  leased
to  over 540  tenants which  engage in a  wide variety  of businesses, including
financial  services,  entertainment,  health  care  services,  accounting,  law,
computer  technology, education and publishing. As  of August 1, 1996, no single
tenant accounted for more  than approximately 3.3%  of the aggregate  Annualized
Base   Rent  of  the  Company's  portfolio  and  only  16  tenants  individually
represented more than 1% of such aggregate Annualized Base Rent.
    
 
    The  Company  believes  that  certain  economic  fundamentals  in   Southern
California provide an attractive environment for owning, acquiring and operating
Class A suburban office properties:
 
    - According  to  AMERICA'S  OFFICE  ECONOMY  prepared  by  Cognetics,  Inc.,
      Metropolitan Los Angeles  (which includes  Los Angeles  County and  Orange
      County),  in  which 23  of  the Company's  24  Properties are  located, is
      projected to be  the number one  market in the  United States for  primary
      office employment growth during the period from 1995 to 2005;
 
    - According  to statistics released by the  U.S. Bureau of Labor Statistics,
      the unemployment rate in the  Los Angeles/Long Beach Primary  Metropolitan
      Statistical  Area  (the  "Los  Angeles  PMSA"),  in  which  21  of  the 24
      Properties are located,  has decreased  significantly over  the past  four
      years, falling from an average of 9.8% during 1992 to 7.9% during 1995;
 
    - The  Los Angeles  EDC has  forecast that  economic activity  will increase
      twice as fast in Los Angeles County  than in the nation as a whole  during
      1996  and 1997, with inflation-adjusted gross product growing at a rate of
      5.2% and 5% in Los Angeles County as compared to 2.5% and 2.4% in 1996 and
      1997 for the nation as a whole; and
 
    - Since 1992,  there  has  been  very limited  construction  of  new  office
      properties  in the Southern  California region. The  Company believes that
      this limited  construction of  office properties  coupled with  a  growing
      economy  will continue to result in  increased demand for office space and
      positive  net   absorption  in   the  Southern   California  region,   and
      particularly  in the selected submarkets where  most of the Properties are
      located. See "Southern California Economy and Office Markets."
 
                                       29
<PAGE>
    Richard S. Ziman, the Chairman and  Chief Executive Officer of the  Company,
has  been involved in the  real estate business for over  25 years. In 1979, Mr.
Ziman co-founded, as managing general partner,  PFG, whose primary focus was  to
acquire  underperforming office  buildings in  good locations  and then actively
manage, lease and  renovate the  properties to  increase cash  flow and  enhance
their  value. During  the early  and mid 1980's,  PFG acquired  over 4.0 million
square feet of commercial office space almost exclusively in Los Angeles  County
and  Orange  County. In  order to  capitalize  on the  escalation of  prices for
Southern California office properties in the late 1980's, PFG sold substantially
all of its interests in its office  properties portfolio at a gain prior to  the
general downturn in the real estate market in Southern California.
 
    In  1993,  in anticipation  of a  recovery in  the Southern  California real
estate market,  the  Company  began to  selectively  acquire  commercial  office
properties  located in suburban  Los Angeles County.  In assembling its existing
portfolio and as part of its operating strategy, the Company primarily  acquired
office  properties that were  located in submarkets  with growth potential, were
underperforming or needed  renovation and  which offered  opportunities for  the
Company  to  implement  its value-added  strategy  to increase  cash  flow. This
strategy includes active  management and aggressive  leasing efforts, a  focused
renovation  and refurbishment program for  underperforming assets, reduction and
containment of operating  costs and emphasis  on tenant satisfaction  (including
efforts  to  maximize  tenant  retention at  lease  expiration  and  programs to
relocate tenants to other spaces within the Company's portfolio). The  Company's
commitment  to tenant satisfaction  and retention is  evidenced by its retention
rate of  approximately 82%  (based on  square feet  renewed) from  1993  through
August 1, 1996 and management's on-going relationships with multi-site tenants.
 
    The  Company  believes  that  it has  been  successful  in  implementing its
value-added strategy  as  evidenced  by increased  occupancy  rates  and  rental
revenue  at the Properties.  As of August  1, 1996, the  Properties owned by the
Company for  more  than  one year  had  a  weighted average  occupancy  rate  of
approximately 88%, compared to a weighted average occupancy of approximately 80%
as  of the  respective dates  such Properties were  acquired by  the Company. In
addition, the Company's  occupancy rates  at many  of its  Properties are  above
market  averages in the  applicable submarkets based  on information included in
the C&W Market Study. As of August 1, 1996, the weighted average occupancy  rate
of  the  21 Properties  located  in Los  Angeles  County was  approximately 90%,
compared to  weighted average  occupancy  rates, as  of  December 31,  1995,  of
approximately  81%  for  office  properties throughout  Los  Angeles  County and
approximately 83% for office properties in the Los Angeles County submarkets  in
which such Properties are located (based in each case on the C&W Market Study).
 
    The  Company  believes  that  the submarkets  in  which  the  Properties are
located, as well as certain additional submarkets within the Southern California
region, present opportunities  for the Company  to continue to  acquire Class  A
suburban  office properties  at attractive  yields and  for prices significantly
below replacement costs. To date, the  Company has acquired its Properties at  a
cost which the Company believes is significantly below replacement cost based on
estimates  of replacement costs of Class A  office buildings included in the C&W
Market Study. As part  of its growth strategy  to pursue such acquisitions,  the
Company  has acquired  five properties  in 1996  and will  use approximately $35
million of the  net proceeds from  the Offering to  acquire the two  Acquisition
Properties  concurrently with the Offering. The Acquisition Properties contain a
total of approximately 298,000 rentable square feet and are located in  suburban
Los Angeles County. The Company believes that these acquisitions demonstrate its
ability,  through its local  market expertise, to identify  and, with respect to
the 1996 acquired  properties, to complete  acquisitions in selected  submarkets
within  Southern California at prices significantly below replacement cost based
on estimates of replacement  costs of Class A  office buildings included in  the
C&W  Market Study. See "Business and Growth Strategies." To capitalize on future
acquisition opportunities,  the Company  is negotiating  a $100  million  Credit
Facility  which  the Company  expects to  use for  acquiring properties  and for
general corporate purposes, although there can be no assurance that the  Company
will enter into the Credit Facility.
 
    Upon  completion of the Offering, the founders and executive officers of the
Company will beneficially own approximately 12.61% of the Company, assuming  the
exchange  of all  of their  OP Units  for Common  Stock and  excluding shares of
Common Stock subject to options granted under the Company's 1996 Stock Incentive
Plan (the "Stock Incentive Plan").
 
                                       30
<PAGE>
    The Company  is a  Maryland corporation  incorporated on  May 1,  1996.  The
Company's  executive offices are located at 9100 Wilshire Boulevard, East Tower,
Suite 700, Beverly  Hills, California 90212  and its telephone  number is  (310)
271-8600.
 
                         BUSINESS AND GROWTH STRATEGIES
 
    The  Company's primary  business objectives are  to maximize  growth in cash
flow and to enhance the value of its portfolio in order to maximize total return
to its stockholders.  The Company believes  it can achieve  these objectives  by
continuing  to implement its business strategies  and capitalize on the external
and internal growth  opportunities described below.  The Company also  believes,
based  on its  evaluation of  market conditions, that  a number  of factors will
enhance its  ability  to achieve  its  business objectives,  including  (i)  the
continuing  improvement  in the  Southern California  economy; (ii)  the limited
construction of new office properties in  the Southern California region due  to
the  substantial  cost  to develop  new  office properties  compared  to current
acquisition prices  and substantial  building construction  limitations in  many
submarkets,  which provides  opportunities to  maximize occupancy  rates, rental
rates and  overall  portfolio  value;  and (iii)  the  limited  availability  of
conventional  real estate financing for new construction of office properties in
Southern California.
 
BUSINESS STRATEGIES
 
    The Company's primary business  strategies are to  (i) acquire and  renovate
underperforming  office properties or properties which provide attractive yields
with stable  cash flow  in submarkets  where  it can  utilize its  local  market
expertise  and  extensive  real  estate  experience;  (ii)  actively  manage its
portfolio; and  (iii) selectively  provide real  estate management  services  to
third  parties. When market conditions permit,  the Company may also develop new
properties in submarkets where it has local market expertise.
 
    Based on  its own  historical  activities and  its  knowledge of  the  local
marketplace  the Company believes that (i) the Southern California region offers
opportunities  for  companies  like  the  Company  that  are   well-capitalized,
experienced owners of real estate with extensive local market expertise and (ii)
being   a  public  company  will  enhance  its  ability  to  take  advantage  of
opportunities to acquire additional office  properties at attractive prices  and
develop  office properties, when  feasible, at attractive  returns. Through four
regional offices,  the  Company  implements  its  business  strategies  by:  (i)
emphasizing  tenant satisfaction and retention  and employing intensive property
marketing programs; (ii) utilizing a multidisciplinary approach to  acquisition,
management,  leasing and  renovation activities  that is  designed to coordinate
decision-making and enhance  responsiveness to market  opportunities and  tenant
needs;   and  (iii)  implementing  cost  control  management  and  systems  that
capitalize on  economies of  scale arising  from the  size and  location of  the
Company's  portfolio.  The Company  believes  that the  implementation  of these
operating practices has led to the increased occupancy rates and rental  revenue
of its existing portfolio.
 
    AGGRESSIVE   LEASING.    The  Company   utilizes  its  market  position  and
relationships with  a  broad array  of  brokers  and tenants  to  implement  its
aggressive  leasing efforts  and monitor and  understand the  current and future
space needs  of office  tenants in  its various  submarkets. Since  the  Company
retains  several different brokerage companies as  leasing agents (at least nine
different companies across the four regions and 24 Properties) to implement  its
leasing program, it has a high profile in the brokerage community. This strategy
enables  the  Company  to  attract  and  place  tenants  throughout  all  of the
Properties, thereby improving the Company's penetration in the tenant community.
The Company believes that  not only does the  breadth of its submarket  presence
permit  it to offer a wide variety  of space alternatives to prospective tenants
and to existing tenants whose facility  requirements change over time, but  also
its  leasing agents are  given incentives to locate  tenants to Properties where
they are not the leasing agent.
 
    INTEGRATED DECISION-MAKING AND RESPONSIVENESS.  In addition to the  location
and  quality  of the  Properties, management  generally  credits its  ability to
maintain  its  Properties  at  above-average  market  occupancy  levels  to  the
coordination  of its  decision-making team. Acquisition,  renovation and leasing
activities are coordinated to enhance responsiveness to market opportunities and
tenant needs.  The  Company's renovation  and  construction executive  plays  an
integral  role in both its leasing  and acquisition activities. The acquisition,
leasing and renovation teams work  closely with the Company's senior  management
from the
 
                                       31
<PAGE>
initial  meetings  with  prospective  tenants  or  sellers,  and  throughout the
negotiation process. This integrated approach permits the Company to analyze the
economic terms and costs (including tenant build-out and retrofitting costs) for
each lease on a timely and  efficient basis throughout lease negotiations.  With
respect  to acquisitions, the Company can  quickly analyze the costs of upgrades
and lease-up potential. The Company is able to commit to leasing and acquisition
terms quickly,  facilitate timely  deal  execution and  build-out of  space  for
prospective tenants and minimize downtime between lease rollovers.
 
    COST  CONTROL OPERATING EFFICIENCIES.   The size  and geographic location of
the Company's  portfolio  permit  it  to enhance  portfolio  value  by  lowering
operating  costs and expenses, compared to single-site ownership and management.
The Company  seeks  to capitalize  on  economies  of scale  resulting  from  the
Southern  California geographic focus of the  portfolio and the maintenance of a
centralized state of the art accounting system  for cost control at each of  the
Properties.  The  Company  also  strives  to  minimize  overhead  by controlling
corporate general and administrative  expenses and assigning responsibility  for
multiple submarkets to its four regional offices.
 
GROWTH STRATEGIES
 
    EXTERNAL  GROWTH:  Based on its  own historical activities and its knowledge
of the local marketplace,  the Company believes  that opportunities continue  to
exist  to  acquire additional  office  properties that:  (i)  provide attractive
initial yields with significant potential for  growth in cash flow; (ii) are  in
desirable  locations within submarkets which  the Company believes have economic
growth potential; and (iii)  are underperforming or  need renovation, and  which
therefore  provide opportunities for  the Company to increase  the cash flow and
value of such properties through active management and aggressive leasing.
 
    The  Company  intends  to  continue  to  acquire  office  properties  within
submarkets   in  Southern   California  which   the  Company   believes  present
opportunities for long-term  stable and  rising rental rates  due to  employment
growth,   population  movements  within  the  region  and  restrictions  on  new
development. Upon or shortly after completion  of the Offering the Company  will
have  a  debt-to-total market  capitalization ratio  of approximately  19.3% and
expects to  finance  acquisitions  through  its  proposed  $100  million  Credit
Facility,  although  it may  employ  other financial  alternatives.  The Company
generally targets properties  which are underperforming  or need renovation  and
offer  opportunities for  the Company to  implement its  value-added strategy to
increase cash flow. For example, as of  August 1, 1996, the Properties owned  by
the  Company for  more than one  year had  a weighted average  occupancy rate of
approximately 88%, compared to approximately 80% as of the respective dates such
Properties were acquired  by the  Company. The Company  also targets  properties
which provide attractive yields with stable cash flow.
 
    In  addition, the Company  will seek to acquire  properties at a significant
discount to replacement cost in the  relevant submarket. Since the beginning  of
1993,  the Company has acquired its Properties in suburban Los Angeles County at
a cost which the Company believes is significantly below replacement cost  based
on  estimates of replacement costs  of Class A office  buildings included in the
C&W Market Study. See "Southern California Economy and Office Markets."
 
    The Company believes it has certain competitive advantages which enhance its
ability to identify and capitalize on acquisition opportunities, including:  (i)
management's  significant local  market expertise,  experience and  knowledge of
properties, submarkets  and potential  tenants  within the  Southern  California
region;  (ii) management's long-standing relationships with tenants, real estate
brokers and institutional and other owners of commercial real estate; (iii)  its
fully  integrated  real estate  operations which  allow  the Company  to respond
quickly to  acquisition  opportunities and  enable  it to  provide  real  estate
management   services  to  third   parties  as  a   means  of  identifying  such
opportunities; (iv) its  access to capital  as a public  company, including  the
Company's  proposed $100  million Credit  Facility; (v)  its ability  to acquire
properties in exchange for OP  Units or Common Stock  if the sellers so  desire;
and   (vi)  management's  reputation  as  an  experienced  purchaser  of  office
properties in Southern  California which  has the ability  to effectively  close
transactions.
 
    Recent  examples of the Company's ability to identify attractive acquisition
opportunities include the  two Acquisition  Properties, 303  Glenoaks and  12501
East  Imperial Highway.  The Property  at 303  Glenoaks is  a ten-story, 175,449
square foot, Class  A building situated  in the Burbank  Civic Center area.  The
Company
 
                                       32
<PAGE>
believes  that the  Burbank market,  which is adjacent  to the  very low vacancy
Burbank Media District market,  affords it an opportunity  to capitalize on  the
Burbank  market  tightness  by maximizing  rental  rates at  levels  below those
achieved in the  Burbank Media District  and benefiting from  the spill-over  of
tenants  from the Burbank Media  District who either cannot  find space there or
who do not wish to pay the  full Burbank Media District rents. In addition,  the
Company  plans a common area renovation in  order to become even more attractive
to its existing and potential tenant base. Similarly, the Property at 12501 East
Imperial  Highway  is  a  122,175   square  foot,  six-story  building   located
immediately  off  Interstate  5,  the  primary  central,  north-south  artery of
California. Located  between  downtown  Los  Angeles  and  Orange  County,  this
Property is occupied by major tenants, such as IBM, Mead Corporation, which runs
a  training facility, and GTE California, which runs a teleconferencing facility
on site.  In  addition  to  taking advantage  of  its  portfolio-wide  operating
efficiencies,  the Company plans to decrease operating expenses at this Property
by furnishing  management services  from  its Property  in Anaheim  rather  than
having an on-site manager.
 
    The  Company may  also seek  to take  advantage of  management's development
expertise to develop office space when market conditions support office building
development. The Company believes, however,  that opportunities exist for it  to
continue  to acquire  office properties  within selected  submarkets in Southern
California at less than  replacement cost and,  therefore, currently intends  to
focus on acquisitions rather than development.
 
    INTERNAL  GROWTH:  The Company believes that opportunities exist to increase
cash flow  from its  existing  portfolio and  that  such opportunities  will  be
enhanced  as the  Southern California  office market  continues to  improve. The
Company intends to  pursue internal  growth by  (i) continuing  to maintain  and
improve  occupancy rates through active  management and aggressive leasing; (ii)
realizing fixed contractual base rental  increases or increases tied to  indices
such  as the  CPI; (iii) re-leasing  expiring leases at  increasing market rents
which are expected to result, over time, from increased demand for office  space
in   Southern  California;  (iv)  controlling  operating  expenses  through  the
implementation of  cost  control management  and  systems; (v)  capitalizing  on
economies  of scale arising from the size  of its portfolio; and (vi) increasing
revenue generated  from  parking  facilities at  certain  Properties  where  the
Company  is  currently offering  free parking  as an  amenity or  charging below
market rates.
 
    (i)  MAINTAINING AND IMPROVING OCCUPANCY  RATES:  The Company believes  that
it  has been successful in attracting,  expanding and retaining a diverse tenant
base by  actively managing  its office  properties with  an emphasis  on  tenant
retention and satisfaction. The Company strives to be responsive to the needs of
individual  tenants  through its  on-site professional  management staff  and by
providing tenants  with  alternative space  within  the Company's  portfolio  to
accommodate   their  changing  space  requirements.  The  Company's  success  in
maintaining and  improving occupancy  rates  is demonstrated,  in part,  by  the
number  of existing tenants  which have renewed or  released their space, leased
additional space  to support  their extension  needs, or  moved to  other  space
within the Company's portfolio. The Company has achieved a tenant retention rate
of  approximately  82% (based  on square  feet  renewed) from  inception through
August  1,  1996.  See  "Business   and  Properties  --  Tenant  Retention   and
Expansions."  The  Company also  seeks  to improve  occupancies  by aggressively
marketing  available  space  within  its  portfolio.  As  of  August  1,   1996,
approximately  446,000 rentable square  feet were unleased  within the Company's
portfolio.
 
    (ii)  CONTRACTUAL  BASE RENTAL INCREASES:   The Company  expects to  achieve
internal  growth in cash flow through  leases which contain provisions for fixed
contractual rental increases (including increases  from free or partial rent  to
full  rent) or increases which are tied to indices such as the CPI. Between June
30, 1996 and  July 31,  1997, the  contractual base  rents under  leases in  the
Company's  portfolio are expected  to increase by  an aggregate of approximately
$1.2 million on  an annual basis  due to fixed  contractual rent increases  (not
including  increases from free or  partial rent to full  rent or increases which
are tied to indices such as the CPI).
 
    (iii)   RE-LEASING EXPIRING  LEASES TO  INCREASING MARKET  RENTS:   Although
there  can be  no assurances in  this regard,  the Company believes  that as the
commercial real estate market in Southern California continues to improve, there
will be increasing  demand for office  space and declining  vacancies which  are
expected to
 
                                       33
<PAGE>
result,  over time,  in increasing market  rents. The Company  believes it would
have significant  opportunities to  increase cash  flow during  such periods  of
increasing  market  rents  by  renewing or  re-leasing  expiring  leases  at the
increased market rents.
 
    (iv)   COST CONTROL  MANAGEMENT AND  SYSTEMS:   The Company  seeks to  lower
operating  expenses by implementing cost  control management that capitalizes on
economies of scale  opportunities resulting from  the size and  location of  the
Company's  portfolio. The  Company focuses on  cost control in  various areas of
operations. For  example, the  Company  is seeking  to significantly  lower  its
utility  costs, which constitute over 25% of  the operating costs of most of the
Properties,  through  the  portfolio-wide  installation  of  energy  enhancement
technologies,   which  include   lighting  retrofit,   replacement  of  heating,
ventilation and air conditioning systems, and computer-driven energy  management
systems  which  monitor and  react to  the  climatic requirements  of individual
Properties. The  energy  enhancement  program  is  expected  to  be  implemented
throughout the Properties over the next six months.
 
    (v)    CAPITALIZING  ON ECONOMIES  OF  SCALE:   In  order  to  capitalize on
economies of  scale  arising from  the  size  of the  Company's  portfolio,  the
Company's  property and asset  managers are responsible  for several Properties,
which spreads administrative costs over  such Properties and reduces per  square
foot  administrative expense. In  addition, the Company  believes that insurance
coverage,  parking   operations,  building   and  other   services  and   tenant
improvements  purchased  on  a  portfolio-wide  basis  will  facilitate  further
economies of scale savings.
 
    (vi)  REVENUE FROM PARKING FACILITIES:   The Company owns or leases  parking
facilities which are attached or adjacent to many of the Properties. The Company
currently  provides  free parking  to tenants  at  six of  the Properties  as an
amenity and charges tenants at the remaining Properties at or below market rates
for parking. If the  demand for Southern California  office space increases  and
occupancy  rates  rise, which  the Company  believes is  the trend,  the Company
believes that there may be opportunities to generate additional revenue from the
parking facilities associated with its Properties by charging for parking  which
is  currently provided for  free, increasing below  market rates and maintaining
its arrangements with a limited number of third-party operators of the Company's
parking facilities.
 
                                       34
<PAGE>
                                USE OF PROCEEDS
 
    The net  proceeds to  the Company  from the  Offering, after  deducting  the
estimated  underwriting discounts and commissions  and estimated expenses of the
Offering, are estimated  to be  approximately $347  million (approximately  $400
million  if  the  Underwriters'  overallotment  option  is  exercised  in full),
assuming a public offering price of $20.00  per share. The net cash proceeds  of
the Offering will be used by the Company as follows: approximately $26.8 million
for  payments to certain  Participants (not including  Messrs. Ziman and Coleman
who will not receive any cash in the Formation Transactions) for their interests
in the  Arden Predecessors  and in  certain of  the Properties  and the  balance
(approximately  $320.2 million) will be contributed to the Operating Partnership
in exchange for the  Company's general partner  interest therein. The  Operating
Partnership  will subsequently use the proceeds  received from the Company along
with the  net cash  proceeds of  approximately $103  million from  the  Mortgage
Financing  borrowed  concurrently  with  the  Offering  and  approximately $19.3
million in  restricted  cash that  will  be  available upon  conclusion  of  the
Formation  Transactions, as follows: approximately $398 million for repayment of
mortgage debt on the Properties (which  was incurred to acquire the  Properties)
and  unsecured lines of  credit and the related  additional and accrued interest
thereon, approximately $35  million for payment  of the purchase  price for  the
Acquisition  Properties, and the remaining net  proceeds will be used for tenant
improvements, capital  expenditure reserves  and working  capital purposes.  See
"Management's  Discussion  and Analysis  of Financial  Condition and  Results of
Operations -- Liquidity and Capital Resources."
 
    If the Underwriters'  overallotment option to  purchase 2,827,000 shares  of
Common Stock is exercised in full, the Company expects to use the additional net
proceeds  (which  will be  approximately  $52.6 million)  to  acquire additional
office properties and for working capital.
 
    Pending application of net proceeds, the Company will invest such portion of
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.
 
    The following table sets forth certain information regarding the debt to  be
repaid  upon  completion  of  the Offering  and  the  Mortgage  Financing, which
consists primarily  of  mortgage or  secured  debt encumbering  certain  of  the
Properties. The mortgages and other indebtedness to be repaid upon completion of
the Offering had a weighted average interest rate of approximately 8.541% before
consideration  of  additional  interest  and any  lenders'  participation  and a
weighted average remaining term  to maturity of approximately  2.86 years as  of
June 30, 1996.
 
                                       35
<PAGE>
MORTGAGE DEBT TO BE REPAID
 
<TABLE>
<CAPTION>
                                                                           PRINCIPAL BALANCE
                                                                             OF DEBT TO BE
                                                                              REPAID UPON
                                                                             CONSUMMATION
                                                                            OF THE OFFERING
                                                                           AND THE MORTGAGE
                                                                             FINANCING (1)
                                                                          -------------------
                                                                            (IN THOUSANDS)
<S>                                                                       <C>
PROPERTY
- ----------------------------------------------------------------------
9665 Wilshire.........................................................         $ 30,716
Beverly Atrium........................................................           15,631
Century Park Center...................................................           25,170
Westwood Terrace......................................................           20,514
1950 Sawtelle.........................................................           10,200
400 Corporate Pointe..................................................           21,885
Bristol Plaza.........................................................            5,200
Skyview Center........................................................           40,242
The New Wilshire......................................................           21,494
5601 Lindero Canyon...................................................           10,161
Calabasas Commerce Center.............................................           11,527
Woodland Hills Financial..............................................           22,612
16000 Ventura Blvd....................................................           17,151
425 West Broadway.....................................................            5,000
70 South Lake.........................................................           10,741
4811 Airport Plaza Drive..............................................           14,261
4910 Airport Plaza Drive..............................................                 (2)
5000 East Spring......................................................           10,922
100 Broadway..........................................................           20,250
5832 Bolsa............................................................            4,618
Anaheim City Centre...................................................            9,880
Imperial Bank Tower...................................................           41,451
                                                                               --------
    Total.............................................................         $369,626
                                                                               --------
                                                                               --------
</TABLE>
 
- ------------------------
 
(1)  Exact repayment amounts  may differ due to  amortization. These figures are
    estimated as of  September 1, 1996  and exclude (a)  accrued and  additional
    interest  estimated to be approximately $25 million in the aggregate and (b)
    $3.26 million  under  lines  of  credit  to  be  assumed  by  the  Operating
    Partnership.
 
(2) Included in amount listed above for 4811 Airport Plaza Drive.
 
                                 DISTRIBUTIONS
 
    Subsequent  to the Offering,  the Company intends  to make regular quarterly
distributions to the holders of its  Common Stock. The Company intends to  cause
the  Operating Partnership initially to  distribute annually approximately 94.5%
of estimated Cash Available for Distribution.  The Company intends to pay a  pro
rata  distribution with respect to  the period commencing on  the closing of the
Offering and ending on December 31, 1996  based upon $0.40 per share for a  full
quarter.  On an annualized basis, this would  be $1.60 per share (of which $0.21
may represent a return of capital  for tax purposes), or an annual  distribution
rate  of approximately 8% based on the assumed initial public offering price per
share of $20.00. The Company does not intend to reduce the expected distribution
per share if the Underwriters' overallotment option is exercised. The  following
discussion and the information set forth in the table and footnotes below should
be  read in connection with the financial  statements and notes thereto, the pro
forma financial information and notes  thereto and "Management's Discussion  and
Analysis  of  Financial Condition  and Results  of  Operations --  Liquidity and
Capital Resources" included elsewhere in this Prospectus.
 
                                       36
<PAGE>
    The Company's  estimate of  the Cash  Available for  Distribution after  the
Offering  is based upon pro forma Funds  from Operations for the 12 months ended
June 30, 1996, with certain adjustments  based on the items described below.  To
estimate  Cash Available for Distribution for the 12 months ended July 31, 1997,
pro forma  Funds from  Operations for  the 12  months ended  June 30,  1996  was
adjusted  (a) without giving effect to  any changes in working capital resulting
from changes in current  assets and current liabilities  (which changes are  not
anticipated  to be material) or the amount of  cash estimated to be used for (i)
investing activities for  development, acquisition and  other activities  (other
than  a reserve  for capital expenditures  and tenant  improvements for renewing
space) and  (ii)  financing activities,  (b)  for certain  known  events  and/or
contractual  commitments that  either occurred  subsequent to  June 30,  1996 or
during the 12 months ended June 30, 1996 but were not effective for the full  12
months  and  (c) for  certain non-GAAP  adjustments  consisting of  (i) revising
historical rent estimates from a GAAP  basis to amounts currently being paid  or
due  from  tenants and  (ii) an  estimate of  amounts anticipated  for recurring
tenant improvements, leasing commissions and capital expenditures. The  estimate
of  Cash Available  for Distribution  is being  made solely  for the  purpose of
setting the  initial distribution  and is  not intended  to be  a projection  or
forecast  of the Company's  results of operations  or its liquidity,  nor is the
methodology upon which such adjustments were  made necessarily intended to be  a
basis  for determining future distributions. Future distributions by the Company
will be at the discretion of the  Board of Directors. There can be no  assurance
that any distributions will be made or that the estimated level of distributions
will be maintained by the Company.
 
    The  Company  anticipates that  its distributions  will exceed  earnings and
profits for income tax  reporting purposes due  to non-cash expenses,  primarily
depreciation  and  amortization,  to  be  incurred  by  the  Company. Therefore,
approximately 12.98% (or $0.21 per share) of the distributions anticipated to be
paid by the  Company for  the first  12 months  subsequent to  the Offering  are
expected to represent a return of capital for federal income tax purposes and in
such  event will not be  subject to federal income tax  under current law to the
extent such distributions  do not  exceed a stockholder's  basis in  his or  her
Common  Stock. The  nontaxable distributions  will reduce  the 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. The  percentage of  stockholder distributions  that
represents  a nontaxable return  of capital may vary  substantially from year to
year.
 
    Federal income tax law requires that a REIT distribute annually at least 95%
of its REIT taxable income. See  "Federal Income Tax Considerations --  Taxation
of  the Company." The  amount of distributions  on an annual  basis necessary to
maintain the Company's  REIT status  based on pro  forma taxable  income of  the
Operating  Partnership for  the 12  months ended June  30, 1996  as adjusted for
certain items  in  the  following  table would  have  been  approximately  $28.8
million.  The estimated Cash Available for  Distribution is anticipated to be in
excess of  the  annual  distribution requirements  applicable  to  REITs.  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.  For a discussion of the tax treatment of distributions to holders
of Common Stock see "Federal Income Tax Considerations."
 
    The Company believes that  its estimate of  Cash Available for  Distribution
constitutes  a reasonable  basis for setting  the initial  distribution, and the
Company expects to  maintain its  initial distribution  rate for  the 12  months
subsequent  to  the  Offering  unless  actual  results  of  operations, economic
conditions or other factors  differ from the assumptions  used in the  estimate.
The  Company's actual  results of  operations will  be affected  by a  number of
factors, including  the  revenue received  from  the Properties,  the  operating
expenses  of  the  Company, interest  expense,  the  ability of  tenants  of the
Properties to  meet their  obligations and  unanticipated capital  expenditures.
Variations  in the net proceeds from the Offering as a result of a change in the
initial public offering price or the exercise of the Underwriters' overallotment
option may affect the  Cash Available for Distribution  and the payout ratio  of
Cash  Available For  Distribution and  available reserves.  No assurance  can be
given that the Company's estimate will  prove accurate. Actual results may  vary
substantially from the estimate.
 
                                       37
<PAGE>
    The  following  table  describes the  calculation  of pro  forma  Funds from
Operations for the  12 months ended  June 30,  1996 and the  adjustments to  pro
forma  Funds from Operations for the 12 months ended June 30, 1996 in estimating
initial Cash Available for  Distribution for the 12  months ended July 31,  1997
(amounts in thousands except share data, per share data, square footage data and
percentages):
 
   
<TABLE>
<S>                                                                       <C>
Pro forma income before minority interests for the year ended December
  31, 1995............................................................    $24,420
Pro forma income before minority interests for the six months ended
  June 30, 1995.......................................................    (12,242)
Pro forma income before minority interests for the six months ended
  June 30, 1996.......................................................     14,080
                                                                          -------
Pro forma income before minority interests for the 12 months ended
  June 30, 1996.......................................................     26,258
Plus pro forma real estate depreciation for the 12 months ended
  June 30, 1996 (1)...................................................     10,461
Plus pro forma amortization of leasing commissions and tenant
  improvements for the 12 months ended June 30, 1996 (2)..............      1,053
                                                                          -------
Pro forma Funds from Operations for the 12 months ended June 30,
  1996................................................................     37,772
 
Adjustments:
  Provision for assumed expiring leases (3)...........................     (2,543)
  Incremental pro forma lease adjustment (4)..........................      3,554
  Net increase in tenant reimbursements (5)...........................        691
  Net decrease in property operating expenses (6).....................      2,049
  Contractual net increases in parking income and other income (7)....         63
                                                                          -------
Estimated pro forma Funds from Operations for the 12 months ended July
  31, 1997............................................................     41,586
  Net effect of straight lining of rents (8)..........................     (2,129)
  Estimated recurring non-revenue enhancing tenant improvements and
   leasing commissions (9)............................................     (3,217)
  Estimated recurring non-revenue enhancing capital expenditures
   (10)...............................................................       (727)
                                                                          -------
Total estimated Cash Available for Distribution for the 12 months
  ended July 31, 1997.................................................    $35,513
Total estimated cash distributions....................................    $34,786
Less: Minority interests' share of estimated cash distributions.......      4,627
                                                                          -------
Estimated cash distributions to stockholders of the Company (11)......    $30,159
Estimated initial cash distribution per share (12)....................    $  1.60
Estimated Cash Available for Distribution payout ratio (13)...........       98.0%
</TABLE>
    
 
- ------------------------
(1)  Pro forma depreciation for the year ended December 31, 1995 of $10,866 plus
    pro forma depreciation  for the  six months ended  June 30,  1996 of  $5,021
    minus  pro forma  depreciation for  the six  months ended  June 30,  1995 of
    $5,426.
 
(2) Pro forma amortization  of leasing commissions  and tenant improvements  for
    the  year ended  December 31,  1995 of $683  plus pro  forma amortization of
    leasing commissions and tenant  improvements for the  six months ended  June
    30,  1996 of  $753 minus pro  forma amortization of  leasing commissions and
    tenant improvements for the three months ended June 30, 1995 of $383.
 
   
(3) The provision for  assumed expiring leases above  assumes no lease  renewals
    for  the  period  from August  16,  1996  to July  31,  1997.  The Company's
    historical renewal rate,  based on  square footage,  from inception  through
    August  1, 1996 is 82%.  The following table sets  forth the estimated Funds
    from Operations, the total estimated Cash Available for Distribution and the
    estimated Cash Available for
    
 
                                       38
<PAGE>
   
    Distribution payout ratio that would be expected to result for the 12 months
    ended July 31, 1997 if the renewal rate for leases expiring from August  16,
    1996  through July 31, 1997 is 70%  (which the Company reasonably expects to
    achieve based on its historical renewal rates).
    
 
   
<TABLE>
<CAPTION>
Pro forma Funds from Operations for the 12 months ended June 30,
 1996..................................................................     37,772
 
<S>                                                                      <C>
Adjustments:
  Provision for assumed expiring leases................................     (1,110)(i)
  Incremental pro forma lease adjustment (4)...........................      3,554
  Net increase in tenant reimbursements (5)............................        691
  Net decrease in property operating expenses (6)......................      1,914
  Contractual net increases in parking income and other income (7).....         63
                                                                         ------------
Estimated pro forma Funds from Operations for the 12 months ended July
 31, 1997..............................................................     42,884
  Net effect of straight lining of rents (8)...........................     (2,129)
  Estimated recurring non-revenue enhancing tenant improvements and
   leasing commissions (9).............................................     (3,217)
  Estimated recurring non-revenue enhancing capital expenditures
   (10)................................................................       (727)
                                                                         ------------
Total estimated Cash Available for Distribution for the 12 months ended
 July 31, 1997.........................................................  $  36,811
Total estimated cash distributions.....................................  $  34,786
Less: Minority interests' share of estimated cash distribution.........      4,622
                                                                         ------------
Estimated cash distributions to stockholders of the Company (11).......  $  30,164
Estimated initial cash distribution per share (12).....................  $    1.60
Estimated Cash Available for Distribution payout ratio (13)............       94.5%
</TABLE>
    
 
    ----------------------------
   
    (i) This provision for assumed expiring leases represents adjustments for  a
       possible reduction in occupancy and in rental rates and consists of (i) a
       reduction  of $763  which represents  30% of  the rent  payable under all
       leases expiring from August 16, 1996 through July 31, 1997 assuming  that
       30%  of such expiring leases will not be renewed (and for the period that
       such leases will not  generate rent during the  12 months ended July  31,
       1997)  and (ii) a reduction  of $347 for the 70%  of leases assumed to be
       renewed between August  16, 1996  and July  31, 1997  assuming that  such
       leases  renew at the lower of the contractual rental rate of the lease at
       the time of its expiration or the Company's analysis of the market rate.
    
 
(4) Reflects rental increases and decreases from 1995 and 1996 completed leasing
    transactions relating to the Properties and  consists of (i) a net  increase
    of  $2,726 representing additional minimum rent from new leases and renewals
    executed between June 30, 1996 and August 16, 1996 to the extent such leases
    generate additional minimum  rents for the  12 months ended  July 31,  1997,
    (ii)  a decrease  of $137  representing the  decrease in  rental revenue for
    leases that expired between June 30, 1996 and August 16, 1996 to the  extent
    such leases generated rent for the 12 months ended June 30, 1996 and (iii) a
    net  amount of $965  representing the full  year minimum rent  in effect for
    existing leases on which rent is only partially reflected in the  historical
    financial  statements of the Arden Predecessors for the 12 months ended June
    30, 1996 and the decrease in rental revenue for leases expired during the 12
    months ended June  30, 1996  to the extent  rental revenue  was included  in
    rental revenue for the 12 months ended June 30, 1996.
 
(5)  Represents  (i)  a  $722  contractual  increase  in  tenant  reimbursements
    attributable to  leases executed  prior  to June  30,  1996 based  upon  the
    estimated  expenses to be reimbursed by the  tenants for the 12 months ended
    July 31, 1997 in excess of the  estimated base year amounts, and (ii) a  $31
    decrease  in tenant reimbursements due to the reassessment of property taxes
    and changes in insurance and property operating costs.
 
   
(6) Represents the estimated net decrease in operating expenses based on (i)  an
    increase  of $132  assuming no  lease renewals  and $267  assuming 70% lease
    renewals resulting  from the  net increase  in the  occupancy of  space  for
    leases signed during the 12 months ended June 30, 1996, and between June 30,
    1996  and August 16, 1996,  offset by the decrease  in occupancy from actual
    lease terminations through
    
 
                                       39
<PAGE>
    June 30, 1996 and for the provision  for expiring leases (See (3) above)  as
    if  such increases and decreases were in effect for the full 12 months ended
    July 31, 1997, and (ii) a decrease in property operating costs of $2,181 due
    to the reassessment of property taxes and reduction of insurance costs based
    on current arrangements.
 
   
(7) Represents net additional parking revenue of  $12 to be received for the  12
    months ended July 31, 1997, relating to leases signed subsequent to June 30,
    1996  and the increase  in management fee  revenue of $51  for the 12 months
    ending July  31,  1997 relating  to  three third-party  property  management
    contracts  pursuant to which the Company  began receiving fees subsequent to
    June 30,  1996. The  Company  believes that  it  can manage  the  additional
    properties  with its existing  resources and, accordingly,  there will be no
    additional increase  in its  operating expenses  attributable to  these  new
    contracts.  The  management contracts  are terminable  upon  15 to  60 days'
    notice although the Company is not aware  of any intention to cancel any  of
    these management contracts.
    
 
   
(8)  Represents the effect of adjusting straight-line rental revenue included in
    pro forma  net  income for  the  12 months  ended  July 31,  1997  from  the
    straight-line  accrual basis  to amounts  currently being  paid or  due from
    tenants. Following is a table  which shows the adjustments to  straight-line
    revenue for 1997-2001 related to leases in place at August 1, 1996.
    
 
<TABLE>
<CAPTION>
  1997       1998       1999       2000       2001
- ---------  ---------  ---------  ---------  ---------
<S>        <C>        <C>        <C>        <C>
$(1,199)    $(164)      $602      $1,305     $1,651
</TABLE>
 
(9)  Reflects  non-revenue  enhancing  tenant  improvements  ("TI")  and leasing
    commissions ("LC") for the Properties for the 12 months ended July 31,  1997
    based  on the weighted  average TI and  LC expenditures per  square foot for
    renewed and re-tenanted space at the Properties since 1993 multiplied by the
    average annual square feet  of leased space for  which leases expire  during
    the five year period ending December 31, 2001 (400,000 square feet).
 
<TABLE>
<CAPTION>
                                                                                JANUARY
                                                                                1-
                                                    YEAR ENDED DECEMBER 31,     AUGUST
                                                    -----------------------       1,    WEIGHTED
                                                    1993   1994      1995(I)     1996   AVERAGE
                                                    -----  -----     ------     ------  ------
<S>                                                 <C>    <C>       <C>        <C>     <C>
RENEWAL
TI per square foot................................  $3.58  $2.23     $ 4.67     $5.46   $4.19
LC per square foot................................  $ .09  $3.44     $ 1.11     $2.38   $2.37
                                                    -----  -----     ------     ------  ------
    Total TI and LC per square foot...............  $3.67  $5.67     $ 5.78     $7.84   $6.56
                                                    -----  -----     ------     ------  ------
                                                    -----  -----     ------     ------  ------
RE-TENANTED (ii)
TI per square foot................................  $2.22  $9.04     $ 9.82     $7.04   $8.38
LC per square foot................................  $ .31  $2.72     $ 3.05     $3.66   $3.12
                                                    -----  -----     ------     ------  ------
    Total TI and LC per square foot...............  $2.53  $11.76    $12.87     $10.70  $11.50
                                                    -----  -----     ------     ------  ------
                                                    -----  -----     ------     ------  ------
</TABLE>
 
       ---------------------
       (i)  Excludes tenant improvement and leasing commission costs relating to
           one lease  signed  at  Anaheim  City Centre  for  which  the  Company
           incurred substantial renovation costs in connection with a full floor
           retrofit.  Tenant improvement  costs for  all leases  renewed in 1995
           equaled $8.05 per square foot.
 
       (ii) Does not  include shell  space build  out for  187,703 square  feet.
           Shell  space  remaining at  the  Properties is  less  than 2%  of the
           aggregate rentable square footage of the Properties.
 
<TABLE>
<CAPTION>
                                              THREE YEAR            AVERAGE ANNUAL
                                               WEIGHTED             SQUARE FOOTAGE         RATE OF
                                            AVERAGE TI AND            EXPIRING IN          RENEWALS/        TOTAL
                                          LC PER SQUARE FOOT           1997-2001           RE-TENANTED       COST
                                          ------------------        ---------------        -------        ----------
<S>                                       <C>                  <C>  <C>               <C>  <C>       <C>  <C>
Renewal.................................        $ 6.56           x      400,000         x    70%(i)    =  $    1,837
Re-tenanted.............................        $11.50           x      400,000         x    30%       =       1,380
                                                                                                          ----------
                                                                                                          $    3,217
                                                                                                          ----------
                                                                                                          ----------
</TABLE>
 
       ---------------------
       (i) The historical  weighted average  renewal rate for  the Company  from
           January 1, 1993 is 82%.
 
                                       40
<PAGE>
(10)  The reserve for  recurring non-revenue enhancing  capital expenditures for
    the 12 months ended July 31, 1997  was based upon an annual cost per  square
    foot  of  $.18.  The Company  has  calculated  this reserve  based  upon its
    estimates of replacement or  renovation costs and  actual lives of:  parking
    lots,  roofs, heating,  ventilation and air  conditioning systems, elevators
    and mechanical systems, lobbies, restrooms and corridors.
 
(11) The  Company's  share of  estimated  cash  distributions is  based  on  its
    approximately 86.71% ownership of the aggregate equity capitalization of the
    Operating Partnership.
 
(12)  Based  on  a  total  of  18,852,500  shares  to  be  outstanding following
    consummation of  the  Offering.  The Company  estimates  that  approximately
    12.98%  of the estimated cash distributions for the 12 months ended July 31,
    1997 will represent a return of capital for federal income tax purposes.
 
   
(13) Calculated as the total estimated  cash distributions divided by the  total
    estimated  Cash Available for Distribution for  the 12 months ended July 31,
    1997. The payout ratio of estimated  pro forma Funds from Operations  equals
    83.6%.
    
 
                                       41
<PAGE>
                                 CAPITALIZATION
 
    The following table sets forth the combined historical capitalization of the
Arden  Predecessors and the pro forma  combined capitalization of the Company as
of June 30, 1996, as adjusted to give effect to the Formation Transactions,  the
Offering  and use of the net proceeds  from the Offering and from the concurrent
Mortgage Financing as  set forth under  "Use of Proceeds."  The information  set
forth  in the table should  be read in connection  with the financial statements
and notes thereto,  the pro forma  financial information and  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
                                                                        -------------------
                                                                                  PRO FORMA
                                                                        COMBINED     AS
                                                                        HISTORICAL ADJUSTED
                                                                        --------  ---------
                                                                          (IN THOUSANDS)
<S>                                                                     <C>       <C>
Debt:
  Mortgage Loans (1)..................................................  $263,492  $104,000
  Line of Credit......................................................     2,467     --
Minority interests in Operating Partnership...........................       718    43,231
Stockholders' equity:
  Preferred Stock, $.01 par value, 20,000,000 shares authorized; none
   issued and outstanding.............................................     --        --
  Common Stock, $.01 par value; 100,000,000 shares authorized;
   18,852,500 issued and outstanding (2)..............................     --          189
  Additional Paid-in Capital..........................................     --      281,693
  Owners' Equity......................................................     7,530     --
                                                                        --------  ---------
    Total Owners'/Stockholders' Equity................................     7,530   281,882
                                                                        --------  ---------
      Total Capitalization............................................  $274,207  $429,113
                                                                        --------  ---------
                                                                        --------  ---------
</TABLE>
 
- ------------------------
(1)  See note 4 of  the notes to the combined  financial statements of the Arden
    Predecessors for information relating to the indebtedness.
 
(2) Includes shares  of Common  Stock to  be issued  in the  Offering and  5,000
    shares  issued to employees of the Company as a stock bonus. See "Management
    -- Executive Compensation." Does not include (i) 2,889,071 shares of  Common
    Stock  that may be issued upon the exchange of OP Units issued in connection
    with the  Formation  Transactions, (ii)  2,827,000  shares of  Common  Stock
    subject to the Underwriters' overallotment option or (iii) 868,500 shares of
    Common  Stock subject to options granted under the Company's Stock Incentive
    Plan.
 
                                       42
<PAGE>
                                    DILUTION
 
    At June 30, 1996, the Company had a net tangible book value of approximately
$6.6 million. After giving effect to (i) the sale of the shares of Common  Stock
offered hereby (at an assumed initial public offering price of $20.00 per share)
and  the receipt by  the Company of  approximately $347 million  in net proceeds
from the Offering,  after deducting underwriting  discounts and commissions  and
estimated Offering expenses, (ii) the repayment of approximately $398 million of
indebtedness  under  mortgage  debt  and unsecured  lines  of  credit (including
approximately $25 million of accrued, deferred and additional interest, of which
approximately $17.9 million was not accrued as of June 30, 1996 on the  combined
balance  sheet of the Arden Predecessors), the pro forma net tangible book value
at June 30, 1996  would have been  $321 million, or $14.76  per share of  Common
Stock.  This amount represents an immediate  increase in net tangible book value
of $12.48  per share  to  the existing  holders of  OP  Units and  an  immediate
dilution in pro forma net tangible book value of $2.28 per share of Common Stock
to new investors. The following table illustrates this dilution:
 
<TABLE>
<S>                                                                     <C>    <C>
Assumed initial public offering price per share.......................         $20.00
  Net tangible book value per share prior to the Offering (1).........  $2.28
  Increase in net tangible book value per share attributable to the
   Offering (2).......................................................  $12.48
Pro forma net tangible book value after the Offering (3)..............         $14.76
                                                                               ------
Dilution in net tangible book value per share of Common Stock to new
  investors (4).......................................................         $ 5.24
                                                                               ------
                                                                               ------
</TABLE>
 
- ------------------------
(1)  Net tangible book  value per share  prior to the  Offering is determined by
    dividing net tangible book value of the Company (based on the June 30,  1996
    net  book value of the  assets less net book  value of prepaid financing and
    leasing  costs  to   be  contributed  in   connection  with  the   Formation
    Transactions,  net of liabilities to be assumed)  by the number of shares of
    Common Stock issuable upon the exchange of all OP Units to be issued to  the
    Participants in connection with the Formation Transactions.
(2)  Based on an  assumed initial public  offering price of  $20.00 per share of
    Common Stock and after deducting Underwriters' discounts and commissions and
    estimated Offering expenses.
(3) Based on total pro forma net tangible book value of $321 million divided  by
    the  total number of shares of Common  Stock. There is no impact on dilution
    attributable to the issuance of Common Stock in exchange for OP Units to  be
    issued to the Participants since such OP Units would be exchanged for Common
    Stock on a one-for-one basis.
(4)  Dilution is determined by subtracting net  tangible book value per share of
    Common Stock after  the Offering  from the assumed  initial public  offering
    price for a share of Common Stock.
 
    The  following table summarizes, on  a pro forma basis  giving effect to the
Offering and the Formation Transactions, the number of shares of Common Stock to
be sold by the Company in the Offering  and the number of OP Units to be  issued
to  the  Participants in  connection with  the  Formation Transactions,  the net
tangible book  value as  of  June 30,  1996 of  the  assets contributed  in  the
Formation   Transactions  and  the  net  tangible  book  value  of  the  average
contribution per share based on total contributions.
 
<TABLE>
<CAPTION>
                                                                        COMMON SHARES/      BOOK VALUE OF     BOOK VALUE OF
                                                                        OP UNITS ISSUED     CONTRIBUTIONS          AVG.
                                                                        ---------------   -----------------    CONTRIBUTION
                                                                        SHARES  PERCENT      $      PERCENT   PER SHARE/UNIT
                                                                        ------  -------   --------  -------   --------------
                                                                                 (IN THOUSANDS EXCEPT PERCENTAGES)
<S>                                                                     <C>     <C>       <C>       <C>       <C>
New investors in the Offering.........................................  18,848   86.69%   $376,950   98.28%     $20.00(3)
OP Units and Common Shares issued to Continuing Investors (1).........   2,894   13.31%   $  6,589(2)   1.72%   $ 2.28
                                                                        ------  -------   --------  -------
  Total...............................................................  21,742  100.00%   $383,539  100.00%
                                                                        ------  -------   --------  -------
                                                                        ------  -------   --------  -------
</TABLE>
 
- ------------------------
(1) Common Shares represents  5,000 shares to be  issued upon completion of  the
    Offering as a Common Stock Bonus to two officers of the Company.
(2)  Based on the June 30, 1996 net book value of the assets less net book value
    of prepaid financing and leasing costs to be contributed in connection  with
    the Formation Transactions, net of liabilities to be assumed.
(3)  Before  deducting  underwriting  discounts  and  commissions  and estimated
    expenses of the Offering.
 
                                       43
<PAGE>
                        SELECTED COMBINED FINANCIAL DATA
 
    The  following  sets  forth   selected  combined  financial  and   operating
information  on a pro forma  basis for the Company  and on a combined historical
basis for the Arden  Predecessors. The following information  should be read  in
conjunction  with the financial statements and  notes thereto of the Company and
of the Arden Predecessors  included elsewhere in  this Prospectus. The  selected
combined   historical  financial   and  operating   information  of   the  Arden
Predecessors at December 31, 1995 and 1994, and for the years ended December 31,
1995, 1994 and  1993, has been  derived from the  historical combined  financial
statements audited by Ernst & Young LLP, independent auditors, whose report with
respect  thereto is included elsewhere in this Prospectus. The selected combined
financial and operating information for the  six months ended June 30, 1996  and
June  30, 1995 has been derived from the unaudited combined financial statements
of the Arden Predecessors included elsewhere in this Prospectus.
 
    The unaudited  pro forma  financial and  operating information  for the  six
months  ended June 30, 1996 and the year ended December 31, 1995 is presented as
if the  Offering, the  Formation  Transactions (including  the purchase  of  the
Acquisition  Properties), and the  acquisitions of the  1996 Acquired Properties
and the 1995  Acquired Properties  had all  occurred by  June 30,  1996 for  the
combined  balance sheet  and at  the beginning of  the period  presented for the
combined statements of operations. The pro forma balance sheet information  also
gives  effect to the  recording of minority  interest for OP  Units, as if these
transactions occurred on June 30, 1996.  The pro forma financial information  is
not  necessarily indicative of what the  actual financial position or results of
the Company would have  been as of  and for the periods  indicated, nor does  it
purport  to  represent the  Company's future  financial  position or  results of
operations.
 
                                       44
<PAGE>
                          THE COMPANY (PRO FORMA) AND
                    ARDEN PREDECESSORS (COMBINED HISTORICAL)
   
<TABLE>
<CAPTION>
                                              SIX MONTHS ENDED JUNE 30,
                                            ------------------------------
                                                             COMBINED
                                            PRO FORMA       HISTORICAL
                                            ---------   ------------------
                                              1996        1996      1995
                                            ---------   --------  --------
<S>                                         <C>         <C>       <C>
                                              (IN THOUSANDS, EXCEPT PER
                                                     SHARE DATA)
OPERATING DATA:
Revenue:
  Rental..................................   $33,493    $ 19,404  $  2,822
  Tenant reimbursements...................     2,049       1,425       177
  Parking.................................     3,090       2,121       220
  Other...................................     1,304       1,521       649
                                            ---------   --------  --------
    Total revenue.........................    34,936      24,471     3,868
EXPENSES:
  Property operating expenses.............    14,124       8,252       934
  General and administrative expenses.....     1,900         830       684
  Depreciation and amortization...........     5,774       3,036       638
  Interest expense........................     4,058      14,741     1,403
                                            ---------   --------  --------
    Total Expenses........................    25,856      26,859     3,659
                                            ---------   --------  --------
Equity in net income (loss) of noncombined
  entities................................        --         (94)      108
                                            ---------   --------  --------
Income (loss) before minority interests...    14,080      (2,482)      317
Minority interests........................    (1,871)        344        (7)
                                            ---------   --------  --------
Net income (loss).........................   $12,209    $ (2,138) $    310
                                            ---------   --------  --------
                                            ---------   --------  --------
Net income per common share...............   $   .70
                                            ---------
                                            ---------
 
<CAPTION>
                                                            YEAR ENDED DECEMBER 31,
                                            -------------------------------------------------------
                                                                    COMBINED HISTORICAL
                                                        -------------------------------------------
                                                                                               THE
                                                                                              PERIOD
                                                                                              MARCH
                                                                                               22,
                                                                                              1991
                                                                                               TO
                                            PRO FORMA                                         DECEMBER
                                            ---------                                         31,
                                              1995        1995       1994      1993    1992   1991
                                            ---------   ---------  --------  --------  -----  -----
<S>                                         <C>         <C>        <C>       <C>       <C>    <C>
 
OPERATING DATA:
Revenue:
  Rental..................................   $66,691    $   8,832  $  5,157  $  3,034  $--    $--
  Tenant reimbursements...................     2,910          403       217        35   --    --
  Parking.................................     5,895          750       382       279   --    --
  Other...................................     2,440        1,707       796       314    324  11
                                            ---------   ---------  --------  --------  -----  -----
    Total revenue.........................    77,936       11,692     6,552     3,662    324  11
EXPENSES:
  Property operating expenses.............    30,091        3,339     2,191     1,480   --    --
  General and administrative expenses.....     3,800        1,377       689       386    471  7
  Depreciation and amortization...........    11,549        1,898     1,143       646      2  --
  Interest expense........................     8,076        5,537     1,673       499      9  --
                                            ---------   ---------  --------  --------  -----  -----
    Total Expenses........................    53,516       12,151     5,696     3,011    482  7
                                            ---------   ---------  --------  --------  -----  -----
Equity in net income (loss) of noncombined
  entities................................        --         (116)      201         4   --    --
                                            ---------   ---------  --------  --------  -----  -----
Income (loss) before minority interests...    24,420         (575)    1,057       655   (158) 4
Minority interests........................    (3,245)          (1)        1     --      --    --
                                            ---------   ---------  --------  --------  -----  -----
Net income (loss).........................   $21,175    $    (576) $  1,058  $    655  $(158) $4
                                            ---------   ---------  --------  --------  -----  -----
                                            ---------   ---------  --------  --------  -----  -----
Net income per common share...............   $  1.23
                                            ---------
                                            ---------
</TABLE>
    
 
   
<TABLE>
<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>
                                                                         (IN THOUSANDS)
BALANCE SHEET DATA:
Commercial office properties -- net of
  accumulated depreciation...................  $410,160     $254,749    $160,874  $ 34,977  $25,404  $--    $--
Total assets.................................   436,581      286,165     182,379    46,090   27,911   134      10
Mortgage loans payable and unsecured lines of
  credit.....................................   104,000      265,959     168,451    32,944   24,356   250    --
Total liabilities............................   111,468      277,917     174,163    34,148   25,190   287       5
Minority interests...........................    43,231          718         100        99    --      --     --
Owners'/Stockholders' equity.................   281,882        7,530       8,116    11,843    2,721  (153)      5
</TABLE>
    
 
                                       45
<PAGE>
                          THE COMPANY (PRO FORMA) AND
                    ARDEN PREDECESSORS (COMBINED HISTORICAL)
   
<TABLE>
<CAPTION>
                                              SIX MONTHS ENDED JUNE 30,
                                            ------------------------------
                                                             COMBINED
                                            PRO FORMA       HISTORICAL
                                            ---------   ------------------
                                              1996        1996      1995
                                            ---------   --------  --------
<S>                                         <C>         <C>       <C>
                                              (IN THOUSANDS, EXCEPT PER
                                             SHARE DATA, PERCENTAGES AND
                                                NUMBER OF PROPERTIES)
OTHER DATA:
Funds from Operations (1):
  Income (loss) before minority
   interests..............................   $14,080    $ (2,482) $    317
  Depreciation and amortization...........     5,774       3,036       638
                                            ---------   --------  --------
    Funds from Operations.................    19,854         554       955
Company's Share Percentage................     86.69%
Company's Share of Funds from
  Operations..............................    17,211         554       955
                                            ---------   --------  --------
Cash flows from operating activities......     --          2,013       458
Cash flows from investing activities......     --        (96,827)   (5,578)
Cash flows from financing activities......     --         94,937     4,550
Number of Properties owned at period
  end.....................................        24          21        10
Gross rentable square feet of Properties
  owned at period end.....................     4,036       3,547     1,408
Occupancy at period end of Properties
  owned at period end.....................     --   %         89%       84%
 
<CAPTION>
                                                            YEAR ENDED DECEMBER 31,
                                            -------------------------------------------------------
                                                                         COMBINED
                                                                        HISTORICAL
                                                        -------------------------------------------
                                                                                               THE
                                                                                              PERIOD
                                                                                              MARCH
                                                                                               31,
                                                                                              1991
                                                                                               TO
                                            PRO FORMA                                         DECEMBER
                                            ---------                                         31,
                                              1995        1995       1994      1993    1992   1991
                                            ---------   ---------  --------  --------  -----  -----
<S>                                         <C>         <C>        <C>       <C>       <C>    <C>
 
OTHER DATA:
Funds from Operations (1):
  Income (loss) before minority
   interests..............................   $24,420    $    (575) $  1,057  $    655  $(158) $4
  Depreciation and amortization...........    11,549        1,898     1,143       646      2  --
                                            ---------   ---------  --------  --------  -----  -----
    Funds from Operations.................    35,969        1,323     2,200     1,301   (156) 4
Company's Share Percentage................
Company's Share of Funds from
  Operations..............................    31,182        1,323     2,200     1,301   (156) 4
                                            ---------   ---------  --------  --------  -----  -----
Cash flows from operating activities......     --           2,830       834     1,186   (258) 7
Cash flows from investing activities......     --        (123,358)  (17,921)  (25,965)  --    --
Cash flows from financing activities......     --         120,707    16,845    25,632    250  1
Number of Properties owned at period
  end.....................................        24           17         8         3   --    --
Gross rentable square feet of Properties
  owned at period end.....................     4,036        2,634     1,130       530   --    --
Occupancy at period end of Properties
  owned at period end.....................     --   %          88%       82%       84%  --    --
</TABLE>
    
 
- ---------------
(1) The White Paper on Funds from Operations approved by the Board of  Governors
    of  the National Association of Real  Estate Investment Trusts ("NAREIT") in
    March 1995 (the "White Paper") defines  Funds from Operations 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  and  after  adjustments  for unconsolidated
    partnerships and joint ventures. Management considers Funds from  Operations
    an  appropriate  measure of  performance  of an  equity  REIT because  it is
    predicated on cash flow analyses. The Company computes Funds from Operations
    in accordance with standards established by the White Paper which may differ
    from the methodology for calculating Funds from Operations utilized by other
    equity REITs and, accordingly,  may not be comparable  to such other  REITs.
    Funds  from Operations  should not  be considered  as an  alternative to net
    income (determined in accordance with GAAP) as an indicator of the Company's
    financial performance or to cash flow from operating activities  (determined
    in  accordance with GAAP) as a measure of the Company's liquidity, nor is it
    indicative of funds available  to fund the  Company's cash needs,  including
    its ability to make distributions.
 
                                       46
<PAGE>
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
OVERVIEW
 
    The  following  discussion  should  be  read  in  conjunction  with Selected
Financial  Data  and  the  financial  statements  appearing  elsewhere  in  this
Prospectus. Where appropriate, the following discussion includes analysis of the
effects  of the Formation Transactions and  the Offering, including the Mortgage
Financing and  the purchase  of the  Acquisition Properties.  These effects  are
reflected  in  the pro  forma  condensed combined  financial  statements located
elsewhere in this Prospectus.
 
    The Company receives income primarily from rental revenue (including  tenant
reimbursements)  and parking revenue from commercial office properties, and to a
lesser extent, from the management of certain properties owned by third parties.
The Company has acquired its current  portfolio over the last three years,  with
approximately 16% of the Properties (as a percentage of pro forma rental revenue
for  the  six  months ended  June  30,  1996) acquired  in  calendar  year 1993,
approximately 13% of the Properties acquired in 1994, approximately 39% acquired
in 1995, and the balance (32%) acquired as of June 30, 1996. As a result of  the
Company's  aggressive acquisition program, the  financial data shows significant
increases in  total revenue  from  year to  year,  largely attributable  to  the
acquisitions during each such year and the benefit of a full period of effective
rental  and other revenue for Properties acquired in the preceding year. For the
foregoing reasons, the Company does not believe its year to year and quarter  to
quarter financial data are comparable.
 
    The  Company expects that the more significant part of its revenue growth in
the next one to two years will come from additional acquisitions and contractual
rent increases  rather than  from occupancy  and market  rent increases  in  its
current  portfolio. On the other hand, the Company believes that if the Southern
California office rental market continues to improve, then rental rate increases
will become  a  more substantial  part  of its  revenue  growth over  time.  See
"Business and Growth Strategies -- Growth Strategies."
 
RESULTS OF OPERATIONS
 
    COMPARISON  OF SIX MONTHS ENDED  JUNE 30, 1996 TO  SIX MONTHS ENDED JUNE 30,
1995.  During  the first  half of 1996,  the Arden  Predecessors purchased  four
Properties  resulting in an increase in real estate investments of approximately
$95 million.
 
    Rental revenue increased by $16.6 million  or 588% for the six months  ended
June  30, 1996 compared to  the six months ended June  30, 1995. The increase in
rental revenue resulted  principally from a  full six months  of rental  revenue
from  Properties acquired during calendar year  1995, six of which were acquired
after June 30, 1995, and rental revenue from Properties acquired during the  six
months  ended June 30, 1996. Rental revenue from the calendar year 1995 acquired
Properties increased to $10.0  million for the six  months ended June 30,  1996,
representing  a full  six months  of rental revenue,  from $83,000  in the prior
period. Rental revenue  associated with  the 1996 acquired  Properties added  an
additional  approximately $6.7 million  to rental revenue  during the six months
ended June 30, 1996.
 
    Tenant reimbursements and other  revenue increased by  $2.1 million or  257%
for the six months ended June 30, 1996 compared to the six months ended June 30,
1995.   The  increase  in  tenant  reimbursements  and  other  revenue  resulted
principally from  a full  six months  of tenant  reimbursements from  Properties
acquired  during calendar  year 1995  and tenant  reimbursements from Properties
acquired during the six months ended  June 30, 1996. Tenant reimbursements  from
the  calendar year 1995 acquired Properties added an additional $745,000 for the
six months  ended  June 30,  1996,  representing a  full  six months  of  tenant
reimbursements.   Tenant  reimbursements  associated   with  the  1996  acquired
Properties added an additional $457,000 to  revenue during the six months  ended
June  30,  1996.  Other  revenue, representing  primarily  management  fees from
third-party owned properties, increased  by 134% for the  six months ended  June
30, 1996 compared to the prior period.
 
    Parking  revenue increased by $1.9 million or  864% for the six months ended
June 30, 1996  compared to  the six  months ended  June 30,  1995. The  increase
resulted  principally from a full six  months of parking revenue from Properties
acquired during calendar year 1995 and parking revenue from Properties  acquired
during  the six months  ended June 30,  1996. Parking revenue  from the calendar
year 1995 acquisition
 
                                       47
<PAGE>
Properties increased to  $1.3 million for  the six months  ended June 30,  1996,
representing  a full six months of parking revenue, from $0 in the prior period.
Parking revenue associated with the 1996 acquired Properties added an additional
$597,000 to parking revenue during the six months ended June 30, 1996.
 
    The Arden Predecessors hold noncontrolling investments in various  entities,
the noncombined entities, which own commercial office properties. These entities
are  accounted for in  the financial statements of  the Arden Predecessors using
the equity method.  Equity in net  income of noncombined  entities decreased  by
$202,000 for the six months ended June 30, 1996 compared to the six months ended
June  30,  1995. This  215%  decrease is  due  principally to  significant large
tenants vacating space in the first quarter of 1996 at two of the properties.
 
    The following is a comparison of certain expenses of the Arden  Predecessors
for the six months ended June 30, 1996 to the six months ended June 30, 1995:
 
<TABLE>
<CAPTION>
                                                                                DOLLAR      PERCENT
                                               JUNE 30, 1996   JUNE 30, 1995    CHANGE      CHANGE
                                               -------------  ---------------  ---------  -----------
                                                       (IN THOUSANDS)
<S>                                            <C>            <C>              <C>        <C>
Certain Expenses
  Property operating and maintenance.........    $   4,998       $     754     $   4,244         563%
  Real estate taxes..........................        1,291             138         1,153         836%
  Insurance..................................        1,503              42         1,461       3,479%
  Ground rent................................          460              --           460          --
                                                    ------           -----     ---------       -----
    Total certain expenses...................    $   8,252       $     934     $   7,318         784%
                                                    ------           -----     ---------       -----
                                                    ------           -----     ---------       -----
</TABLE>
 
   
    For the six months ended June 30, 1996 and 1995, total certain expenses were
$8.3  million, or 40% of rental revenue and tenant reimbursements, and $934,000,
or 31% of rental revenue  and tenant reimbursements, respectively. The  increase
in  total certain expenses is primarily  attributable to the Properties acquired
during calendar year 1995 and during the six months ended June 30, 1996 and  the
expenses  associated with the absorption of  vacant rentable space. The increase
in total certain expenses  from the six  months ended June 30,  1995 to the  six
months  ended June 30, 1996 resulting  from the acquisition of Properties during
the six months ended June 30, 1996 was approximately $3.1 million. In  addition,
total  certain expenses  increased by  $4.2 million  as a  result of  a full six
months  of   operations  for   the  Properties   acquired  in   1995,  and   the
above-described  increase in occupancy at the  Properties owned at both June 30,
1996 and 1995. Total certain expenses related to Properties owned by the Company
for the  entire six  months  ended June  30, 1995  and  1996 decreased  2.2%  or
$20,000.
    
 
    General and administrative expenses increased by $146,000 or 21% for the six
months  ended June  30, 1996  compared to  the six  months ended  June 30, 1995.
However, general and administrative expenses during the 1996 period fell to 3.4%
of total revenue compared to 17.7% of  total revenue during the 1995 period  due
to  the economies  of scale  associated with  adding additional  properties. The
Company believes that because it will not need to hire significant new staff  to
manage  its  current  portfolio  and  to  acquire  new  properties,  general and
administrative expenses  as a  percentage of  total revenue  should continue  to
fall.
 
    Interest  expense includes interest  at the contractual  current pay rate of
the mortgage  loans, amortization  of the  loan fees  paid at  origination,  and
accrual  of additional  interest due upon  the retirement of  the debt. Interest
expense for the six months ended June 30, 1996 was approximately $14.7  million,
including  interest  payable  upon  the retirement  of  certain  mortgage loans.
Interest expense increased by  approximately $13.3 million or  951% for the  six
months  ended June  30, 1996  compared to  the six  months ended  June 30, 1995,
primarily as a  result of the  increase in  mortgage loans payable  to fund  the
calendar  year 1995 acquisitions  and the acquisitions  that occurred during the
six months  ended  June 30,  1996.  The  interest expense  associated  with  the
mortgage  loans  originated  during  the  six months  ended  June  30,  1996 was
approximately $4.7 million.  In addition,  the six  months ended  June 30,  1996
included  a full six  months of interest expense  for Properties acquired during
calendar year  1995,  which increased  interest  expense by  approximately  $8.5
million.
 
                                       48
<PAGE>
    Depreciation  and amortization increased  by $2.4 million  or 376% primarily
due to the calendar year 1995  acquisitions and the acquisitions during the  six
months ended June 30, 1996.
 
    As a result of the foregoing, the Company had a net loss of $2.1 million for
the  six months ended June  30, 1996 compared to net  income of $310,000 for the
prior period.
 
    The following is a comparison of property operating data for the  Properties
("Same  Store Properties") that were owned for  the entire six months ended June
30, 1995 and June 30, 1996:
 
<TABLE>
<CAPTION>
                                                                        JUNE 30, 1996    JUNE 30, 1995
                                                                        --------------   --------------
<S>                                                                     <C>              <C>
Revenue:
  Rental..............................................................    $2,713,000       $2,739,000
  Tenant reimbursements...............................................       224,000          176,000
  Parking.............................................................       246,000          220,000
  Other...............................................................        87,000           26,000
                                                                        --------------   --------------
    Total revenue.....................................................    $3,270,000       $3,161,000
                                                                        --------------   --------------
                                                                        --------------   --------------
 
Expenses:
  Property operating, taxes, insurance and ground rent................    $  900,000       $  919,000
                                                                        --------------   --------------
                                                                        --------------   --------------
</TABLE>
 
    Rental revenues decreased during the six months ended June 30, 1996 compared
to the same period in  1995 due primarily to a  net decrease in rental rate  for
leases  that renewed or were retenanted. For the six months ended June 30, 1996,
tenant reimbursements  and other  income  increased by  $109,000 over  the  same
period  in  1995. In  addition, operating  expenses including  taxes, insurance,
ground rent for  these Same Store  Properties decreased by  $19,000 for the  six
months  ended June 30,  1996 over the same  period in the prior  year due to the
economies of scale  that the Company  achieved by owning  a larger portfolio  of
properties  and  the reassessment  of property  taxes. The  Company was  able to
obtain certain discounts by utilizing its greater purchasing power.
 
    COMPARISON OF  YEAR ENDED  DECEMBER  31, 1995  TO  YEAR ENDED  DECEMBER  31,
1994.   During 1995, the Arden Predecessors purchased seven Properties resulting
in an increase in real estate investments of approximately $126 million.
 
    Rental revenue increased by $3.7 million or 71% for the year ended  December
31,  1995 compared to the  year ended December 31,  1994. The increase in rental
revenue resulted  principally  from a  full  year  of rental  revenue  from  the
property  acquired  in  1994 and  partial  year rental  revenue  from Properties
acquired in 1995. Rental revenue from the 1994 acquisition property increased to
$1.2 million for the year ended December  31, 1995, representing a full year  of
rental  revenue,  from $977,000  for  such property  in  the prior  year. Rental
revenue associated  with the  1995 acquisition  Properties added  an  additional
approximately $3.2 million to rental revenue in 1995.
 
    Tenant  reimbursements and other  revenue increased by  $1.1 million or 108%
for the year ended  December 31, 1995  compared to the  year ended December  31,
1994.  Other revenue  increased by  $911,000, primarily  representing management
fees from third  party-owned properties. The  increase in tenant  reimbursements
and other revenue resulted principally from a full year of tenant reimbursements
from  the property acquired  during 1994 and  partial year tenant reimbursements
from Properties acquired during the year ended December 31, 1995 as well as  the
addition  of  one new  third party  property  management agreement  during 1995.
Tenant reimbursements from the calendar year 1994 acquisition property increased
to $239,000 for the year  ended December 31, 1995,  representing a full year  of
tenant  reimbursements, from $182,000  in the prior  year. Tenant reimbursements
associated  with   the  1995   acquisition   Properties  added   an   additional
approximately  $150,000 to tenant reimbursements  during the year ended December
31, 1995.
 
    Parking revenue increased by $368,000 or 96% for the year ended December 31,
1995 compared  to  the year  ended  December  31, 1994.  The  increase  resulted
principally from a full year of parking revenue from
 
                                       49
<PAGE>
the property acquired during calendar year 1994 and partial year parking revenue
from  Properties  acquired  during the  year  ended December  31,  1995. Parking
revenue associated with  the 1995  acquisition properties,  added an  additional
$319,000 to parking revenue during the year ended December 31, 1995.
 
    At  December 31, 1994 the Arden Predecessors held noncontrolling investments
in various  entities,  the noncombined  entities,  which own  commercial  office
properties.  During  1995,  the  Arden Predecessors  made  an  investment  in an
additional entity which  owns commercial office  properties. These entities  are
accounted  for in the  financial statements of the  Arden Predecessors using the
equity method.  Equity  in  net  income of  noncombined  entities  decreased  by
$317,000  for  the year  ended  December 31,  1995  compared to  the  year ended
December 31, 1994. This 273% decrease  is due principally to significant  tenant
losses in the 1995 investment.
 
    The  following is a comparison of  certain expense of the Arden Predecessors
for the year ended December 31, 1995 to the year ended December 31, 1994:
 
<TABLE>
<CAPTION>
                                               DECEMBER 31,   DECEMBER 31,    DOLLAR      PERCENT
                                                   1995           1994        CHANGE      CHANGE
                                               -------------  -------------  ---------  -----------
                                                      (IN THOUSANDS)
<S>                                            <C>            <C>            <C>        <C>
Certain Expenses
  Property operating and maintenance.........    $   2,539      $   1,869    $     670          36%
  Real estate taxes..........................          502            272          230          85%
  Insurance..................................          279             50          229         458%
  Ground rent................................           19         --               19      --
                                                    ------         ------    ---------         ---
    Total certain expenses...................    $   3,339      $   2,191    $   1,148          52%
                                                    ------         ------    ---------         ---
                                                    ------         ------    ---------         ---
</TABLE>
 
   
    Total certain  expenses were  $3.3 million,  or 36%  of rental  revenue  and
tenant  reimbursements, and  $2.2 million, or  41% of rental  revenue and tenant
reimbursements, for the  years ended December  31, 1995 and  December 31,  1994,
respectively.  The increase in total  certain expenses is primarily attributable
to a full year of operations for the 1994 acquisition property, the partial year
of operations for the  1995 Acquisition Properties  and the expenses  associated
with  the absorption of vacant rentable space across the portfolio. The increase
in total certain expenses from 1994 to 1995 resulting from the 1995 acquisitions
was approximately $1.4 million. In addition, total certain expenses increased by
$44,000 for the  year ended  December 31, 1995  as a  result of a  full year  of
operations  for the property acquired in  1994, and the above-described increase
in occupancy at the Properties owned at both December 31, 1994 and 1995.
    
 
    General and administrative expenses  increased by $688,000  or 100% for  the
year  ended December  31, 1995,  compared to the  year ended  December 31, 1994,
primarily due to additional employees required to manage the increased portfolio
of Properties.  General and  administrative expenses  as a  percentage of  total
revenue was 12% and 11% during 1995 and 1994, respectively. The Company believes
that  because  it will  not need  to hire  significant new  staff to  manage its
current portfolio  and to  acquire new  properties, general  and  administrative
expenses  as a percentage  of total revenue  should begin to  fall in subsequent
years.
 
    Interest expense includes interest  at the contractual  current pay rate  of
the  mortgage  loans, amortization  of the  loan fees  paid at  origination, and
accrual of additional  interest due upon  the retirement of  the debt.  Interest
expense  for the  year ended December  31, 1995 was  approximately $5.5 million,
including interest  payable  of $2.5  million  upon the  retirement  of  certain
mortgage loans. Interest expense increased by $3.9 million, or 231% for the year
ended  December 31, 1995 compared to the  year ended December 31, 1994 primarily
as a  result  of the  increase  in mortgage  loans  incurred to  fund  the  1995
acquisitions.  The interest expense associated with  the 1995 mortgage loans was
$2.7 million. In  addition, 1995 included  a full year  of interest expense  for
debt  incurred to acquire the property in 1994, which increased interest expense
by approximately $466,000.
 
    Depreciation and amortization increased by $755,000 or 66% primarily due  to
the 1995 acquisitions and the full year effect of the 1994 acquisitions.
 
    As a result of the foregoing, the Company had a net loss of $576,000 for the
year  ended December  31, 1995 compared  to net  income of $1.1  million for the
prior year.
 
                                       50
<PAGE>
    The following is a  comparison of the property  operating data for the  Same
Store Properties that were owned for the entire year ended December 31, 1994 and
December 31, 1995:
 
<TABLE>
<CAPTION>
                                                                        DECEMBER 31,   DECEMBER 31,
                                                                            1995           1994
                                                                        ------------   ------------
<S>                                                                     <C>            <C>
Revenue:
  Rental..............................................................  $ 4,417,000     $4,180,000
  Tenant reimbursements...............................................       15,000         36,000
  Parking.............................................................      431,000        382,000
  Other...............................................................      152,000        108,000
                                                                        ------------   ------------
    Total revenue.....................................................    5,015,000      4,706,000
                                                                        ------------   ------------
                                                                        ------------   ------------
Certain expenses:
  Property operating, taxes, insurance and ground rent................  $ 1,724,000     $1,985,000
                                                                        ------------   ------------
                                                                        ------------   ------------
</TABLE>
 
    For  the  year ended  December  31, 1995,  occupancy  increased from  84% at
December 31, 1994  to 92%  at December  31, 1995  and substantially  all of  the
revenue  increase was due to this  occupancy increase. Operating expenses before
depreciation and amortization, and  interest including taxes, insurance,  ground
rent expenses for these Same Store Properties decreased by $261,000 for the year
ended  December 31, 1995 over the prior year  due to the economies of scale that
the Company obtained by owning a larger portfolio of Properties. The Company was
able to allocate its personnel among  more of its Properties and obtain  certain
discounts by utilizing its greater purchasing power.
 
    COMPARISON OF YEAR ENDED DECEMBER 31, 1994 TO YEAR ENDED 1993.  During 1994,
the  Arden  Predecessors  purchased one  Property  resulting in  an  increase in
investments in Properties of approximately $8.7 million.
 
    Rental revenue increased by $2.1 million 70% for the year ended December 31,
1994 compared  to the  year ended  December  31, 1993.  The increase  in  rental
revenue  resulted  principally  from a  full  year  of rental  revenue  from the
property acquired in  1993 and  partial year  rental revenue  from the  property
acquired in 1994. Rental revenue from the 1993 acquisition property increased to
$4.2  million for the year ended December  31, 1994, representing a full year of
rental revenue from that property, from  $3.0 million in the prior year.  Rental
revenue  associated  with  the  1994 acquisition  property  added  an additional
$977,000 to rental revenue in 1994.
 
    Tenant reimbursements and other  revenue increased by  $664,000 or 191%  for
the  year ended December 31, 1994 compared  to the year ended December 31, 1993.
Tenant reimbursement increases represented $182,000 of this increase, and  other
revenue,   primarily  representing   management  fees   from  third  party-owned
properties, represented  $482,000  of  this increase.  The  increase  in  tenant
reimbursements  resulted principally from  a full year  of tenant reimbursements
from the property acquired  during 1993 and  partial year tenant  reimbursements
from  the property acquired during 1994. Tenant reimbursements from the calendar
year 1993 acquisition property increased to $36,000 for the year ended  December
31,  1994, representing a full  year of such revenue,  from $35,000 in the prior
year. Tenant  reimbursements associated  with  the 1994  acquisition  Properties
added  an additional  approximately $182,000  to such  revenue during  1994. The
increase in property  management fees  resulted primarily  from a  full year  of
property  management fees in  1994 for third  party-owned properties managed for
part of the year in the prior period.
 
    Parking revenue increased by $103,000 or 37% for the year ended December 31,
1994 compared  to  the year  ended  December  31, 1993.  The  increase  resulted
primarily  from a full year of parking revenue from the property acquired during
calendar year 1993 and partial year  parking revenue from the property  acquired
during  the year ended December 31, 1994. Parking revenue from the calendar year
1993 acquisition property increased to $382,000 for the year ended December  31,
1994, representing a full year of such revenue, from $279,000 in the prior year.
 
    At   December  31,  1993,  the  Arden  Predecessors  held  a  noncontrolling
investment in one  joint venture  which owns two  commercial office  properties.
During   1994,  the  Arden  Predecessors  made  investments  in  two  additional
noncombined entities which own commercial office properties. These entities  are
accounted
 
                                       51
<PAGE>
for  in  the financial  statements of  the Arden  Predecessors using  the equity
method. Equity in net income of noncombined entities increased by $197,000, from
$4,000 to $201,000, for the  year ended December 31,  1994 compared to the  year
ended  December 31, 1993. This increase is due principally to significant income
generated from the additional properties.
 
    The following is a comparison of certain expenses of the Arden  Predecessors
for the year ended December 31, 1994 to the year ended December 31, 1993:
 
<TABLE>
<CAPTION>
                                               DECEMBER 31,   DECEMBER 31,    DOLLAR      PERCENT
                                                   1994           1993        CHANGE      CHANGE
                                               -------------  -------------  ---------  -----------
                                                      (IN THOUSANDS)
<S>                                            <C>            <C>            <C>        <C>
Certain Expenses
  Property operating and maintenance.........    $   1,869      $   1,324    $     545          41%
  Real estate taxes..........................          272            107          165         154%
  Insurance..................................           50             49            1           2%
  Ground rent................................       --             --           --          --
                                                    ------         ------    ---------         ---
    Total certain expenses...................    $   2,191      $   1,480    $     711          48%
                                                    ------         ------    ---------         ---
                                                    ------         ------    ---------         ---
</TABLE>
 
   
    Total  certain  expenses were  $2.2 million,  or 41%  of rental  revenue and
tenant reimbursements, and  $1.5 million, or  48% of rental  revenue and  tenant
reimbursements,  for the years  ended December 31,  1994 and 1993, respectively.
The increase in total certain expenses is primarily attributable to the addition
of the 1994 acquisition property and the expenses associated with the absorption
of vacant rentable  space across the  portfolio. The increase  in total  certain
expenses from 1993 to 1994 resulting from the 1994 acquisition was approximately
$206,000.  In addition, total certain expenses increased by $505,000 as a result
of a  full  year of  operations  for the  property  acquired in  1993,  and  the
increases  in the occupancy  at such property.  In addition, as  a result of the
Northridge earthquake,  the  Company had  some  minor  damage to  three  of  its
buildings, resulting in $136,000 of property operating and maintenance expenses.
    
 
    General  and  administrative  expenses  increased $303,000  or  79%  in 1994
compared to 1993 primarily due to an increase in payroll of $210,000 required by
the Company  to  manage  its increased  portfolio.  General  and  administrative
expenses  as a percentage of  total revenue remained unchanged  at 11% from 1994
and 1993.
 
    Interest expense in  1994 increased by  $1.0 million, or  159%, compared  to
1993. The increase was primarily due to a full year of interest on debt incurred
in  1993, as well as  the interest due on  a $6.7 million loan  used to fund the
1994 acquisition.  The  interest  expense  associated  with  the  1994  property
acquisition  debt  was  approximately $491,000.  Interest  expense  increased by
$516,000 as a result  of a full  year of interest expense  for debt incurred  to
acquire the property in 1993.
 
    Depreciation and amortization increased by $644,000 or 129% primarily due to
the 1994 acquisition and the full year effect of the 1993 acquisition.
 
    As a result of the foregoing, the Company had net income of $1.1 million for
the  year ended  December 31, 1994  compared to  net income of  $655,000 for the
prior year.
 
PRO FORMA OPERATING RESULTS
 
   
    SIX MONTHS ENDED  JUNE 30,  1996.   On a  pro forma  basis, combined  income
(before  deduction of minority interests) would  have been $14.1 million for the
six months ended  June 30, 1996,  or $12.2  million combined net  income of  the
Company  (after deduction  of minority  interests), comparing  positively to the
historical net loss of $2.1 million for the six months ended June 30, 1996. This
positive comparison results  from a  significant reduction  in interest  expense
based  on the effects of the proposed Offering as well as a substantial increase
in total revenue, due to the benefit of  a pro forma full six months of  revenue
from the Properties acquired (and to be acquired) in 1996.
    
 
                                       52
<PAGE>
   
    Pro  forma  total  revenue is  $39.9  million representing  a  $15.4 million
increase over  historical 1996,  resulting primarily  from an  increase of  $6.0
million  in  rental  revenue  associated with  Properties  acquired  (and  to be
acquired) in 1996. Pro forma revenue  from tenant reimbursements and parking  is
$5.1 million, representing a $1.5 million increase over historical results.
    
 
    The   historical   1996  interest   expense   of  $14.7   million  decreased
substantially to $4.1 million  on a pro  forma basis. Correspondingly,  interest
expense  as a  percentage of  total revenue  dropped substantially,  from 60% of
total revenue in historical 1996 to 10% of total revenue on a pro forma basis.
 
   
    YEAR ENDED DECEMBER 31, 1995.  On a pro forma basis, combined income (before
deduction of minority  interests) would  have been  $24.4 million  for the  year
ended  December 31, 1995,  or $21.2 million  combined net income  of the Company
(after deduction of minority interests), comparing positively to the  historical
net  loss of  $(576,000) for  the year  ended December  31, 1995.  This positive
comparison results from a significant reduction in interest expense as well as a
substantial increase in total revenue,  due to the benefit  of a pro forma  full
year of revenue from the Properties acquired in 1995, and pro forma revenue from
the 1996 acquisitions.
    
 
    Pro  forma  total  revenue is  $78.0  million representing  a  $66.3 million
increase over historical  1995, resulting  primarily from an  increase of  $23.7
million  in  rental  revenue  associated with  Properties  acquired  (and  to be
acquired) in  1996,  combined  with a  full  year  of rental  revenue  from  the
Properties  acquired  in  1995  totaling  $16.6  million.  Revenue  from  tenant
reimbursements and parking also increased on  a pro forma basis over  historical
1995  primarily due to $3.0 million of  such revenue generated at the Properties
acquired or to be acquired in 1996.
 
LIQUIDITY AND CAPITAL RESOURCES
 
    MORTGAGE FINANCING.  The  Company is currently  negotiating an interim  loan
(the  "Mortgage Financing") in the  amount of $104 million  with an affiliate of
Lehman Brothers. The  Mortgage Financing will  have a maturity  of one year  and
bear  interest at a  floating rate equal to  one month LIBOR  plus 1.50% for the
first six  months increasing  to 2.00%  through maturity.  The proceeds  of  the
Mortgage  Financing  will  be  used  primarily to  refinance  a  portion  of the
Company's  existing  mortgage  indebtedness.  The  Mortgage  Financing  will  be
non-recourse and secured by fully cross-collateralized and cross-defaulted first
mortgage liens on the nine Mortgage Financing Properties. The Mortgage Financing
will  require monthly payments of  interest only, with all  principal due on the
first anniversary of the closing of the Mortgage Financing.
 
    The Company intends to refinance the Mortgage Financing through an  offering
of  commercial mortgage-backed securities (the "CMBS  Offering") to be made by a
financing subsidiary which the  Company intends to form  for that purpose in  an
amount  of  approximately $104  million with  a  term of  seven years.  The CMBS
Offering is expected  to bear  interest at a  floating rate  based on  one-month
LIBOR.  The Company intends  to enter into  a swap agreement  with a major money
center bank  in the  notional amount  of $104  million upon  completion of  this
Offering  and  the  Formation  Transactions  or  shortly  thereafter  (the "Swap
Agreement"). The Swap Agreement will result in effective fixed interest payments
equal to the yield on U.S. Treasury Notes with a maturity of seven years plus  a
spread which, if determined on the date hereof, would result in an interest rate
of  7.51%. The CMBS Offering is expected to require monthly payments of interest
only with  all principal  due in  a  balloon payment  at maturity.  The  Company
expects  to pursue the CMBS Offering promptly after the closing of this Offering
and the Formation  Transactions, although  there can  be no  assurance that  the
Company will complete a CMBS Offering or enter into the Swap Agreement.
 
    THE CREDIT FACILITY.  The Company is currently negotiating with a commercial
bank,  the terms of a  two-year, $100 million revolving  credit facility, with a
one-year extension option (the "Credit  Facility"). The Credit Facility will  be
used,  among other  things, to  finance the  acquisition of  properties, provide
funds for tenant improvements and  capital expenditures and provide for  working
capital  and other  corporate purposes.  The Company  intends to  enter into the
Credit Facility contemporaneously with the Offering or shortly thereafter.
 
    The Credit Facility will  have two tranches: an  unsecured tranche of up  to
$50  million,  subject to  the Company's  ownership of  an unencumbered  pool of
qualifying properties with values (calculated as provided
 
                                       53
<PAGE>
in the Credit Facility) of at least 100% of the Company's unsecured liabilities,
and a  secured tranche  of up  to $100  million, subject  to a  borrowing  base.
Aggregate  outstanding  loans  may not  exceed  $100 million.  The  lenders must
approve the properties securing the facility and qualifying properties which are
included in the unencumbered pool. Outstanding loans will bear interest based on
the LIBOR rate  or the bank's  base rate,  at the Company's  option. The  Credit
Facility  will be subject to customary  conditions to closing and borrowing, and
contain  representations  and   warranties  and  defaults   customary  in   REIT
financings.  The  Credit  Facility  is  also  anticipated  to  contain financial
covenants, including  requirements for  a minimum  tangible net  worth,  maximum
liabilities  to asset values, and minimum interest, unsecured interest and fixed
charge coverage ratios (all  calculated as defined in  the Credit Facility)  and
requirements  to  maintain a  pool of  unencumbered  properties approved  by the
lenders and meeting  certain defined characteristics.  The Credit Facility  will
also  contain restrictions  on, among  other things,  indebtedness, investments,
distributions, liens,  and  mergers, and  will  require Mr.  Ziman  to  maintain
certain ownership interests and management roles in the Company. There can be no
assurance  that the Company  will be able  to enter into  the Credit Facility on
terms satisfactory to it. If it is not able to enter into the Credit Facility it
will have  to find  alternative  means to  finance  its future  acquisitions  of
Properties.
 
    ANALYSIS  OF  LIQUIDITY AND  CAPITAL RESOURCES.    The Company  believes the
Offering and the Formation Transactions  will improve its financial  performance
through  changes to its capital structure, principally the substantial reduction
in its  overall  debt  and its  debt  to  equity ratio.  Through  the  Formation
Transactions,  the  Company will  repay all  of its  existing mortgage  debt and
replace it  with secured  floating rate  debt in  the principal  amount of  $104
million  pursuant to the Mortgage Financing.  Thus, total secured debt after the
Formation Transactions (assuming no advances under the Credit Facility) will  be
reduced  by  approximately $266  million  in principal.  This  will result  in a
significant reduction of  annual mortgage  interest expense as  a percentage  of
total  revenue (10.4% on a pro forma basis as compared to 47% for the historical
year ended  December 31,  1995). Thus,  cash from  operations required  to  fund
interest  expenses will decrease substantially,  although such reduction will be
offset by  the use  of cash  from operations  to meet  annual REIT  distribution
requirements.  In addition,  the Offering  and Formation  Transactions, together
with the  Mortgage Financing  and  the Credit  Facility,  will produce  a  lower
leveraged  capital structure. The market capitalization of the Company, based on
the assumed initial public offering price  of the issued and outstanding  shares
of  Common Stock and OP Units (assuming all OP Units are exchanged for shares of
Common Stock) and  the debt outstanding  at the completion  of the Offering,  is
expected  to  be  approximately $538.8  million  with total  debt  (exclusive of
accounts payable  and accrued  expenses)  of approximately  $104 million.  As  a
result,  the  Company's  debt  to  total  market  capitalization  ratio  will be
approximately  19.3%  (17.6%  if  the  Underwriters'  overallotment  option   is
exercised  in  full). The  Credit Facility  combined  with this  lower leveraged
capital structure  should enhance  the Company's  ability to  take advantage  of
acquisition  opportunities as well as provide, if necessary, working capital for
funding commitments to  construct tenant leasehold  improvements and payment  of
leasing commissions associated with new leasing activity.
 
    After  the Offering, the Company expects  to have approximately $100 million
available under the  Credit Facility.  The Company anticipates  that the  Credit
Facility will be used primarily to acquire additional properties and for general
working capital needs.
 
    The  Mortgage Financing matures in 1997.  Since the Company anticipates that
none of the principal  of its mortgage indebtedness  will be amortized prior  to
maturity  and the Company will  not have sufficient funds  on hand to repay such
indebtedness at maturity, it will be necessary for the Company to refinance such
debt either through additional debt financings secured by individual  properties
or  groups  of properties,  by  unsecured private  or  public debt  offerings or
additional equity offerings. See "Risk Factors -- Real Estate Financing  Risks."
The  Company currently expects to refinance  the Mortgage Financings through the
CMBS Offering.
 
    The  Company  expects  to  make   distributions  from  Cash  Available   for
Distribution,  which  the  Company  believes  will  exceed  Cash  Available  for
Distribution historically available as a result of the reduction in debt service
expected to result from the  repayment of indebtedness described above.  Amounts
accumulated for
 
                                       54
<PAGE>
distribution will be invested by the Company primarily in short-term investments
that  are collateralized by securities of the United States government or any of
its   agencies,   high-grade   commercial   paper   and   bank   deposits.   See
"Distributions."
 
    The  Company expects to meet its short-term liquidity requirements generally
through its initial  working capital and  net cash provided  by operations.  The
Company  believes that its net cash provided by operations will be sufficient to
allow the Company to make any  distributions necessary to enable the Company  to
continue  to qualify  as a  REIT. The Company  also believes  that the foregoing
sources of liquidity will be sufficient  to fund its short-term liquidity  needs
for  the foreseeable  future, including recurring  non-revenue enhancing capital
expenditures, tenant improvements and leasing commissions.
 
    The Company expects to meet certain long-term liquidity requirements such as
property acquisitions, scheduled  debt maturities,  renovations, expansions  and
other non-recurring capital improvements through long-term secured and unsecured
indebtedness  and the issuance of additional equity securities. The Company also
expects to use funds available under  the Credit Facility to fund  acquisitions,
development activities and capital improvements on an interim basis.
 
CASH FLOWS
 
    COMPARISON  FOR THE SIX MONTHS  ENDED JUNE 30, 1996  TO THE SIX MONTHS ENDED
JUNE 30, 1995.  The increase in cash and cash equivalents of $872 from June  30,
1995  to  June 30,  1996 is  due to  the  excess of  cash provided  by financing
activities over cash used in operating activities and investing activities.  Net
cash provided by operating activities increased by $1.6 million from $458,000 to
$2.0  million primarily due  to an increase  in rental revenue  offset by higher
mortgage interest.  Net cash  used in  investing activities  increased by  $91.2
million  from $5.6  million to $96.8  million mainly  due to an  increase in the
amount of real estate  assets purchased during 1996  compared to 1995. Net  cash
provided by financing activities increased by $90.3 million from $4.6 million to
$94.9 million due primarily to proceeds received on mortgage loans.
 
    COMPARISON  FOR THE YEAR ENDED DECEMBER 31,  1995 TO THE YEAR ENDED DECEMBER
31, 1994.  The increase in cash  and cash equivalents of $179,000 from  December
31, 1994 to December 31, 1995 is due to the excess of cash provided by operating
and  financing  activities  over cash  used  in investing  activities.  Net cash
provided by operating activities increased by $2.0 million from $834,000 million
to $2.8  million primarily  due to  the additional  cash flow  generated by  the
increase  in  the  number  of  Properties  owned.  Net  cash  used  in investing
activities increased  by $105.5  million from  $17.9 million  to $123.4  million
mainly  due to an increase in the  amount of real estate assets purchased during
1995 compared to 1994.  Net cash provided by  financing activities increased  by
$103.9  million from $16.8 million to $120.7 million due to proceeds received on
mortgage notes  offset  in  part  by increases  in  mortgage  loans  repaid  and
restricted cash.
 
    COMPARISON  FOR THE YEAR ENDED DECEMBER 31,  1994 TO THE YEAR ENDED DECEMBER
31, 1993.  The decrease in cash  and cash equivalents of $242,000 from  December
31, 1993 to December 31, 1994 is due to distributions from one Arden Predecessor
to its owners of $1.4 million and the acquisition of improvements and Properties
in  excess of  financing activities. These  uses were partially  offset by owner
contributions. Net cash provided by  operating activities decreased by  $352,000
from  $1.2 million to $834,000  primarily due to an  increase in rents and other
receivables, deferred  rents prepaid  financing and  leasing costs  and  prepaid
expenses and other assets offset by an increase in depreciation and amortization
and  net income. Net cash used in investing activities decreased by $8.1 million
from $26.0 million to  $17.9 million mainly  due to a decrease  in the value  of
real  estate assets purchased during 1994 compared to 1993. Net cash provided by
financing activities  decreased by  $8.8  million from  $25.6 million  to  $16.8
million  due to  a decrease  in the amount  proceeds received  on mortgage notes
incurred to finance real  estate acquisitions offset in  part by an increase  in
owners' contributions.
 
INFLATION
 
    Substantially  all of the office leases  provide for separate escalations of
real estate taxes and operating expenses  over a base amount. In addition,  many
of  the  office  leases  provide  for  fixed  base  rent  increases  or  indexed
escalations (based on  the CPI  or other  measures). The  Company believes  that
inflationary  increases in expenses will be offset by the expense reimbursements
and contractual rent increases described above.
 
                                       55
<PAGE>
    The Credit Facility is expected to  bear interest at a variable rate,  which
will  be  influenced  by  changes  in short-term  interest  rates,  and  will be
sensitive to inflation.
 
                 SOUTHERN CALIFORNIA ECONOMY AND OFFICE MARKETS
 
    The Company believes  that current  and forecast  trends affecting  Southern
California  have  created  and  will continue  to  create  a  favorable economic
environment  in   the  suburban   Southern  California   office  markets   where
substantially  all of the  Company's Properties are  located. First, the Company
believes that the  supply of  Class A office  space in  Southern California  has
stabilized and is unlikely to increase over the short term in large part because
it  is not economically  feasible to develop  new Class A  office space based on
rental rates currently attainable in  Southern California office markets as  set
forth in the C&W Market Study. Second, the recent economic restructuring of many
of   Southern   California's   primary   office-using   sectors   including  the
entertainment,   export/import,   managed   health   care,   high    technology,
telecommunications,  and civilian and military  aerospace and defense industries
has caused growth in demand for office  space. Third, demand for Class A  office
space  relative to the level  of supply has led to  higher occupancy rates and a
trend towards higher rental  rates which are supportable  in the office  markets
where  the Company's  Properties are  located. Finally,  patterns of residential
relocation to suburban  areas due in  part to the  public perception of  greater
personal   security  and  to  the   availability  of  greater  recreational  and
residential amenities in  suburban areas, coupled  with a heightened  preference
for  living in  close proximity  to work  and employers'  resultant access  to a
broader, more skilled local  labor force have fueled  growth of suburban  office
property  demand. The  Company believes  that these  factors and  other specific
economic indicators  discussed  below suggest  a  general strengthening  of  the
Southern  California economy. Given the quality  and location of its Properties,
the Company  believes it  is  competitively positioned  to capitalize  on  these
economic  trends and the resulting demand for  suburban Class A office space. In
addition, the Company believes that  the suburban Los Angeles County  submarkets
in  which its Properties are located will outperform the Downtown/CBD, which has
not begun to recover from the real estate downturn.
 
SOUTHERN CALIFORNIA ECONOMY
 
    OVERVIEW.   The  Company  believes  that  the  office  markets  in  Southern
California, and particularly suburban Los Angeles County, have improved and will
be excellent markets in which to own and operate office properties over the long
term.
 
    The  three-county  region  in  which the  Company's  Properties  are located
includes Los Angeles, Orange and San Diego counties which collectively  comprise
approximately 45% of the statewide population and employment base in California.
Data  from the U.S.  Bureau of Labor Statistics  indicates that the unemployment
rate in these  counties peaked in  1993 during the  height of the  1990 to  1993
recessionary  period in  Southern California. Recently,  however, these counties
experienced a gradual  economic recovery  marked by  falling unemployment  rates
beginning  in 1994 which, according to THE  1995 ECONOMIC REPORT OF THE GOVERNOR
OF CALIFORNIA (the "1995  ECONOMIC REPORT"), was precipitated  by growth in  the
services  and trade employment sectors, among others, and a less pronounced rate
of decline in defense related  activities in Southern California. For  instance,
the unemployment rate for the Los Angeles PMSA has been declining since 1993 and
dropped  below  8% in  1995 for  the first  time since  1990. Similar  trends of
decreasing unemployment  rates were  also experienced  in Orange  and San  Diego
counties. The graph below illustrates unemployment trends for the United States,
California and the three counties in which the Company's Properties are located.
 
                                       56
<PAGE>
                  HISTORICAL ANNUAL AVERAGE UNEMPLOYMENT RATES
 
EDGAR REPRESENTATION OF DATA POINTS USED IN PRINTED GRAPHIC
 
<TABLE>
<CAPTION>
 UNEMPLOYMENT RATE
<S>                  <C>         <C>                  <C>              <C>                <C>
                     California   Los Angeles County    Orange County   San Diego County       U.S.
1991                       7.7%                 8.2%             5.2%               6.2%       6.7%
1992                       9.3%                 9.8%             6.6%               7.3%       7.4%
1993                       9.4%                 9.8%             6.7%               7.8%       6.8%
1994                       8.6%                 9.4%             5.8%               7.2%       6.1%
1995                       7.8%                 7.9%             5.3%               6.5%       5.6%
</TABLE>
 
- ------------------------
Source: U.S. Bureau of Labor Statistics
 
    The  U.S.  Bureau of  Economic  Analysis has  forecast  a total  increase in
non-farm employment for the period  from 1993 to 2005  of 14.2% for Los  Angeles
County,  35.3% for  Orange County and  30.7% for San  Diego County, representing
average annual growth rates of 1.1%, 2.5% and 2.3%, respectively.
 
    A driving factor in the forecast employment growth within the three counties
in which the Company operates is strong population growth, which, over the  next
five  years is expected to outpace the population growth in the United States as
shown below:
 
<TABLE>
<CAPTION>
                                                                 POPULATION
                                                    POPULATION     GROWTH
                                                      GROWTH      1995-2000
AREA                                                1990-1995(1) PROJECTED(2)
- --------------------------------------------------  ----------   -----------
<S>                                                 <C>          <C>
Los Angeles County................................     3.1%          5.8%
Orange County.....................................     6.4%         11.1%
San Diego County..................................     5.8%         12.1%
California........................................     6.2%          9.1%
United States.....................................     5.6%          5.1%
</TABLE>
 
- ------------------------
(1) Source: U.S. Bureau of the Census. 1990 population from 1990 Census and 1995
    population from July 1, 1995 estimate of the U.S. Bureau of the Census.
 
(2)  Source:  1995  population--U.S.  Bureau  of  the  Census.  2000   projected
    population--Bureau of Economic Analysis (U.S. Department of Commerce).
 
    As  primary office employment grows, office  demand is expected to increase.
According to AMERICA'S OFFICE ECONOMY prepared by Cognetics, Inc.,  Metropolitan
Los  Angeles (which includes Los Angeles County  and Orange County), in which 23
of the Company's 24 Properties  are located, is projected  to be the number  one
market  in the United States  for primary office employment  growth from 1995 to
2005, and San Diego is ranked 18th.
 
                                       57
<PAGE>
                       TOP 20 MARKETS FOR PRIMARY OFFICE
                         EMPLOYMENT GROWTH (1995-2005)
 
<TABLE>
<C>        <S>
       1.  LOS ANGELES
       2.  Atlanta
       3.  San Francisco-Oakland-San Jose
       4.  Washington, DC-MD-VA
       5.  Dallas-Ft. Worth
       6.  Chicago
       7.  Phoenix
       8.  New York
       9.  Houston-Galveston
      10.  Tampa-St. Petersburg
      11.  Minneapolis-St. Paul
      12.  Denver-Boulder
      13.  Boston
      14.  Orlando
      15.  Seattle
      16.  Philadelphia
      17.  Miami-Ft. Lauderdale
      18.  SAN DIEGO
      19.  Detroit
      20.  Kansas City
</TABLE>
 
- ------------------------
Source: Cognetics, Inc.
 
    A significant  factor  affecting primary  office  employment growth  in  Los
Angeles,  Orange and San Diego counties is  a trend within these local economies
to become more services-oriented. Data from the U.S. Bureau of Labor  Statistics
indicates  a  trend  over the  past  six years  of  growth in  the  services and
government  sector  (large   office  space   users),  and  a   decline  in   the
manufacturing, finance, insurance and real estate (FIRE) and trade sectors, with
the  other employment sectors  remaining stable in  proportion to total non-farm
employment. Employment in the service sector  in the Los Angeles PMSA  increased
to 32% of total non-farm employment in 1995 from 29% in 1990. Both Orange County
and San Diego County experienced a similar trend in the employment shift towards
services.
 
    In  addition to becoming a more diversified economy with a stronger emphasis
on the services and  government sectors, according to  the Los Angeles EDC,  Los
Angeles  County  ranked number  one  in the  nation  in the  number  of business
establishments by county in 1992 and  is a major center of international  trade.
According  to the 1995 ECONOMIC REPORT, Los  Angeles County is also the nation's
leading manufacturing  center. Los  Angeles  County comprises  over 40%  of  the
nondurable  manufacturing employment, 95%  of the motion  picture employment and
56% of  the aerospace  employment in  California. The  Los Angeles  PMSA is  the
largest  PMSA in the United States (larger than  both the New York City PMSA and
the Chicago PMSA) and accounts for approximately 28% of California's  population
and  employment base. Demand for office space  in Los Angeles County is expected
to remain strong as a result of these characteristics.
 
    International trade is another  major component of  the Los Angeles  economy
and  while growth in  international trade is difficult  to attribute to specific
employment sectors, it  is an  indicator of the  general strength  of the  local
economy.  In 1994 the Los Angeles Customs District (which is primarily comprised
of the Los  Angeles/Long Beach port  complex and the  Los Angeles  International
Airport)  surpassed New York/ New Jersey as the nation's leading port. According
to the California Department of Finance,  from 1987 to 1995 international  trade
passing   through  the   Los  Angeles   Customs  District   has  increased  from
approximately $77.6 billion in 1987 to approximately $164.2 billion in 1995.
 
SOUTHERN CALIFORNIA OFFICE MARKETS
 
    OVERVIEW.  The Company believes that  the Los Angeles, Orange and San  Diego
County  office markets are attractive markets in which to own and operate office
properties. Specifically, the Los Angeles County  market, in which 21 of the  24
Properties  are  located,  has the  following  favorable  market characteristics
according to  the  C&W  Market  Study:  (i)  the  Los  Angeles  County  suburban
submarkets  have experienced  three years  of positive  net absorption  and five
years of declining direct  vacancy rates; (ii) there  has been virtually no  new
additions to supply to the Los Angeles County suburban office market since 1992;
and  (iii) new speculative  office development is unlikely  at the current time,
primarily because new  construction is not  economically feasible given  current
market  rental rates  and also  because of  governmental constraints  and zoning
restrictions in certain markets.
 
                                       58
<PAGE>
    INCREASING DEMAND FOR OFFICE SPACE.  In the past three years the  underlying
fundamentals  of supply  and demand in  the suburban Los  Angeles County, Orange
County and  downtown  San  Diego  office markets  have  improved.  The  peak  in
available  supply occurred near the midpoint  of the recession. Since that time,
the local economies have been recovering and the relationship between supply and
demand  has  resulted  in  declining  direct  vacancy  rates  and  positive  net
absorption  in these markets. According to the  C&W Market Study, as of December
31, 1995, the  direct vacancy rate  for the suburban  Los Angeles County  office
market, the Orange County office market and the downtown San Diego office market
was  17.0%, 15.5% and 17.9%, respectively, as compared to 19.2%, 19.5% and 19.4%
as of December 31, 1991, respectively.
 
                    HISTORICAL YEAR-END DIRECT VACANCY RATES
 
EDGAR REPRESENTATION OF DATA POINTS USED IN PRINTED GRAPHIC
 
<TABLE>
<CAPTION>
DIRECT VACANCY RATE
<S>                  <C>        <C>                            <C>              <C>
                          U.S.  Los Angeles County (suburban)    Orange County    Downtown San Diego
1991                     17.5%                          19.2%            19.5%                 19.4%
1992                     18.2%                          18.9%            19.1%                 20.7%
1993                     17.2%                          18.4%            17.1%                 19.4%
1994                     15.3%                          17.3%            17.2%                 19.8%
1995                     14.0%                          17.0%            15.5%                 17.9%
</TABLE>
 
- ------------------------
Source: C&W Market Study
Note: U.S. vacancy is the weighted average of 44 markets.
 
    PROJECTED DECLINING DIRECT  VACANCY RATES.   The C&W  Market Study  projects
that  aggregate direct vacancy  rates in the suburban  Los Angeles County office
market would decline to 14.4% as of December 31, 1998 assuming (i) no  additions
to  the supply of office space inventory  that existed in such office markets as
of  December  3,  1995  and  (ii)  annual  positive  net  absorption  of  direct
availabilities of 1,000,000 square feet. C&W's projection of such absorption and
declining  direct  vacancy rates  was based  on  recent historical  positive net
absorption experienced  in the  suburban Los  Angeles County  office market.  No
assurance  can be made that such  absorption of direct availabilities will occur
in the future  or that the  current supply  of office space  inventory will  not
increase,  and therefore that  direct vacancy rates will  decline as outlined in
the graph below.
 
                         PROJECTED DIRECT VACANCY RATES
 
EDGAR REPRESENTATION OF DATA POINTS USED IN PRINTED GRAPHIC
 
<TABLE>
<CAPTION>
           DIRECT VACANCY %
<S>        <C>
1995 (A)               17.0%
1996 (P)               16.1%
1997 (P)               15.2%
1998 (P)               14.4%
</TABLE>
 
- ------------------------
Source: C&W Market Study
 
    NO NEW SUPPLY OF OFFICE SPACE.  According to the C&W Market Study, there has
been virtually no new office development in Los Angeles County and Orange County
since 1992. Similarly, there has been no new office development in downtown  San
Diego   since  1991.   Based  on   the  C&W   Market  Study,   the  addition  of
 
                                       59
<PAGE>
any new speculative  office space to  these markets is  unlikely at the  current
time,  primarily  because  speculative  new  construction  is  not  economically
feasible given  current market  rental rates  and also  because of  governmental
constraints and zoning restrictions in certain markets.
 
    POTENTIAL  REVENUE INCREASE AT REPLACEMENT COST RENTS.  The Company believes
that all of its  Properties have been purchased  at a substantial discount  from
replacement  cost and have the potential for significant internal revenue growth
as rental rates for office properties in their respective submarkets recover  to
levels  ("Replacement Cost  Rents") that  would provide  a reasonable  return on
investment to  a  developer of  a  new  Class A  multi-tenant  office  building.
According to the C&W Market Study, market rental rates in Los Angeles County are
currently  below the levels required to  justify new Class A office development.
Based on estimates  provided in  the C&W  Market Study,  Replacement Cost  Rents
required  to justify  new construction would  be equal to  approximately $35 per
square foot for excellent  quality Class A office  buildings and $24 per  square
foot  for average quality  Class A office buildings.  By comparison, the current
weighted average  annual  base rental  rate  (full service  gross  leases  only,
excluding  leases subject  to net lease  provisions) received by  the Company in
each of its Properties which  ranges from $15.07 per  square foot to $31.45  per
square  foot with a total weighted average annual base rental rate of $20.03 per
square foot and the weighted average annual asking rents for competitive  office
properties  in their  respective submarkets are  substantially below Replacement
Cost Rents. This is confirmed by the fact that according to the C&W Market Study
there has been extremely limited office development (375,000 square feet out  of
a  total 83,533,998 square feet in the submarkets where the Company's Properties
are located) and no speculative office development in the Los Angeles submarkets
where the Company operates Properties in the past four years.
 
    The costs  and implied  Replacement Cost  Rents outlined  above exclude  any
value  attributable to underlying land, which, if purchased in connection with a
new development would imply that higher Replacement Cost Rents would be required
to  justify  the  increased  costs  of  development  resulting  from  the   land
acquisition  costs. There can be no assurance as  to when, if, and the extent to
which the  Properties owned  and  operated by  the  Company will  experience  an
increase in rental rates.
 
                                       60
<PAGE>
                            BUSINESS AND PROPERTIES
 
GENERAL
 
   
    Upon  completion of the Offering, the  Company will own 24 office properties
containing approximately  4.0  million  rentable  square  feet.  The  Properties
consist  primarily of Class A suburban  office properties and individually range
from approximately 49,000 to 540,000 rentable square feet. All of the Properties
are located in  Southern California,  with 21  located in  suburban Los  Angeles
County,  two in Orange County, and one in San Diego County. The Company believes
that  the  Properties  have  desirable  locations  within  established  business
communities  and  are  well-maintained.  Of  the  Company's  24  Properties,  20
Properties have been  built since  1980 and  14 Properties,  including all  four
built  prior to  1980, have been  substantially renovated within  the last three
years. The  average  age  of  the  buildings  is  approximately  12  years.  The
Properties  offer  an array  of various  amenities including  security, parking,
conference facilities,  on-site  management,  food services  and  health  clubs.
Management  believes  that the  location, quality  of construction  and building
amenities, as well  as the Company's  reputation for providing  a high level  of
tenant  service, have enabled the Company to attract and retain a diverse tenant
base. As of August 1, 1996, the Properties had a weighted average occupancy rate
of approximately 89% (compared to the C&W Peer Group weighted average  occupancy
rate  of approximately  83% as of  April 30, 1996)  and were leased  to over 540
tenants. As of August 1, 1996, no one tenant represented more than approximately
3.3% of the aggregate Annualized Base  Rent of the Company's portfolio and  only
16 tenants individually represented more than 1% of such Annualized Base Rent.
    
 
    The  Properties  are leased  to  a variety  of  local, national  and foreign
businesses. Leases  are typically  structured for  terms of  three, five  or  10
years.  Most of the Company's leases are  full service, gross leases under which
tenants typically pay  for all real  estate taxes and  operating expenses  above
those  for an  established base year  or expense stop.  Leases typically contain
provisions permitting tenants  to renew  at prevailing market  rates. Under  the
leases,  the  landlord is  generally  responsible for  structural  repairs. Most
leases do  not permit  early  termination; however,  certain leases  permit  the
tenant  to terminate upon six months' notice after the third year of a five-year
lease or the fifth year of a  10-year lease, subject to the tenant's  obligation
to pay all unamortized tenant improvements and leasing commissions, a penalty of
three  to  six months  of additional  rent, and  any rent  concessions provided,
depending on the lease terms.  Finally, tenants generally pay directly  (without
regard  to a base year or expense stop) for overtime use of air conditioning and
for onsite monthly employee and visitor parking.
 
    Although the  Company primarily  utilizes  gross leases  (which  represented
approximately  84% of  the total  portfolio leased square  feet as  of August 1,
1996), it also has triple net leases  with a number of tenants. In general,  the
triple  net leases require the tenants to pay all real property taxes, insurance
and expenses of maintaining  the leased space or  Property and have renewal  and
termination provisions similar to those described above.
 
    The  Company's  Properties  are  regionally  managed  under  active  central
control. All  administration  (including  the formation  and  implementation  of
policies   and  procedures),  leasing,  capital  expenditures  and  construction
decisions are  centrally administered  at the  Company's corporate  office.  The
Company  employs asset managers to oversee  and direct the day-to-day operations
of the  Properties,  as well  as  the on-site  personnel,  which may  include  a
manager, assistant manager and other necessary staff. Asset managers communicate
daily  with the Company's corporate offices  to implement the Company's policies
and procedures.
 
    The on-site staffing of each Property  is dictated by each Property's  size,
tenant profile, number of tenants and location. The Company contracts with third
parties  for cleaning services,  day porters, engineers  and any other personnel
necessary to operate each Property.
 
PROPERTIES
 
    The following table  sets forth  certain information regarding  each of  the
Properties as of August 1, 1996:
 
                                       61
<PAGE>
   
<TABLE>
<CAPTION>
                                                                                         PERCENTAGE OF   PERCENT
                                                                                             TOTAL       LEASED
                                                                           APPROXIMATE     PORTFOLIO     (AS OF    ANNUALIZED
                                                             YEAR BUILT/    RENTABLE       RENTABLE      AUG. 1,   BASE RENT
SUBMARKET/PROPERTY                            LOCATION        RENOVATED    SQUARE FEET    SQUARE FEET     1996)     ($000S)
- ----------------------------------------  ----------------  -------------  -----------   -------------   -------   ----------
<S>                                       <C>               <C>            <C>           <C>             <C>       <C>
LOS ANGELES COUNTY
- ----------------------------------------
LOS ANGELES WEST
 BEVERLY HILLS/CENTURY CITY
    9665 Wilshire                         Beverly Hills     1972/92-3         158,684         3.9%        95.1%     $ 4,745
    Beverly Atrium                        Beverly Hills     1989               61,314         1.5        100.0        1,400
    Century Park Center                   Los Angeles       1972/94           243,404         6.0         83.2        4,331
 WESTWOOD/WEST LOS ANGELES
    Westwood Terrace                      Los Angeles       1988              135,943         3.4         82.3        2,829
    1950 Sawtelle                         Los Angeles       1988/95           103,772         2.6         77.5        1,609
 MARINA AREA/CULVER CITY/LAX
    400 Corporate Pointe                  Culver City       1987              164,598         4.1         90.2        2,954
    Bristol Plaza                         Culver City       1982               84,014         2.1         78.6        1,195
    Skyview Center                        Los Angeles       1981,87/95(4)     391,675         9.7         86.0        5,730
 PARK MILE/WEST HOLLYWOOD
    The New Wilshire                      Los Angeles       1986              202,704         5.0         83.9        3,458
 
<CAPTION>
LOS ANGELES NORTH
<S>                                       <C>               <C>            <C>           <C>             <C>       <C>
 SIMI/CONEJO VALLEY
    5601 Lindero Canyon                   Westlake          1989              105,830         2.6        100.0        1,180
    Calabasas Commerce Center             Calabasas         1990              123,121         3.1        100.0        2,111
 WEST SAN FERNANDO VALLEY
    Woodland Hills Financial Center       Woodland Hills    1972/95           224,955         5.6         89.8        4,501
 CENTRAL SAN FERNANDO VALLEY
    16000 Ventura Blvd.                   Encino            1980/96           174,841         4.3         84.1        2,970
 EAST SAN FERNANDO VALLEY/TRI-CITIES
    425 West Broadway                     Glendale          1984               71,589         1.8         95.9        1,328
    303 Glenoaks(5)                       Burbank           1983/96           175,449         4.3         97.4        3,477
    70 South Lake                         Pasadena          1982/94           100,133         2.5         81.4        1,695
<CAPTION>
LOS ANGELES SOUTH
<S>                                       <C>               <C>            <C>           <C>             <C>       <C>
 LONG BEACH
    4811 Airport Plaza Drive              Long Beach        1987/95           121,610         3.0        100.0        1,051
    4900/10 Airport Plaza Drive           Long Beach        1987/95           150,403         3.7        100.0        1,173
    5000 East Spring                      Long Beach        1989/95           163,358         4.0         89.6        2,747
    100 West Broadway                     Long Beach        1987/96           191,727         4.7         90.0        3,523
 CERRITOS/NORWALK
    12501 East Imperial Highway (5)       Norwalk           1978/94           122,175         3.0         94.7        1,882
<CAPTION>
ORANGE COUNTY
- ----------------------------------------
<S>                                       <C>               <C>            <C>           <C>             <C>       <C>
 WEST COUNTY
    5832 Bolsa Avenue                     Huntington Beach  1985               49,355         1.2        100.0          659
 TRI-FREEWAY AREA
    Anaheim City Centre                   Anaheim           1986/91           175,391         4.3         93.0        2,458
<CAPTION>
SAN DIEGO COUNTY
- ----------------------------------------
<S>                                       <C>               <C>            <C>           <C>             <C>       <C>
 SAN DIEGO MARKET
    Imperial Bank Tower                   San Diego         1982/96           540,413        13.4         82.2        8,136
                                                                           -----------     ------        -------   ----------
Total/Weighted Average                                                      4,036,458       100.0%        88.9%     $67,142
Weighted Average Rent Per Leased Square Foot - All Leases
Weighted Average Rent Per Leased Square Foot - Gross Leases
Weighted Average Rent Per Leased Square Foot - Net Leases
 
<CAPTION>
                                                                        ANNUAL
                                                                          NET
                                                                       EFFECTIVE
                                          PERCENTAGE OF                RENT PER      ANNUALIZED
                                            PORTFOLIO                   LEASED      BASE RENT PER    C&W PEER GROUP
                                           ANNUALIZED       NUMBER      SQUARE         LEASED           RENT PER
SUBMARKET/PROPERTY                          BASE RENT     OF LEASES    FOOT (1)    SQUARE FOOT (2)   SQUARE FOOT(3)
- ----------------------------------------  -------------   ----------   ---------   ---------------   --------------
<S>                                       <C>             <C>          <C>         <C>               <C>
LOS ANGELES COUNTY
- ----------------------------------------
LOS ANGELES WEST
 BEVERLY HILLS/CENTURY CITY
    9665 Wilshire                              7.1%            18       31$.57         $31.45            $28.32
    Beverly Atrium                             2.1             11       20.46           22.83             28.32
    Century Park Center                        6.5             80       19.86           21.38             22.80
 WESTWOOD/WEST LOS ANGELES
    Westwood Terrace                           4.2             21       24.32           25.30             27.19
    1950 Sawtelle                              2.4             30       19.74           20.02             18.42
 MARINA AREA/CULVER CITY/LAX
    400 Corporate Pointe                       4.4             14       23.24           19.91             17.52
    Bristol Plaza                              1.8             19       17.12           18.10             17.54
    Skyview Center                             8.5             49       16.76           17.01             19.23
 PARK MILE/WEST HOLLYWOOD
    The New Wilshire                           5.2             31       20.30           20.35             21.97
LOS ANGELES NORTH
<S>                                       <C>             <C>          <C>         <C>               <C>
 SIMI/CONEJO VALLEY
    5601 Lindero Canyon                        1.8              2       10.51           11.15             19.03
    Calabasas Commerce Center                  3.1             11       16.81           17.14             19.16
 WEST SAN FERNANDO VALLEY
    Woodland Hills Financial Center            6.7             59       20.52           22.29             22.74
 CENTRAL SAN FERNANDO VALLEY
    16000 Ventura Blvd.                        4.4             39       19.55           20.21             21.33
 EAST SAN FERNANDO VALLEY/TRI-CITIES
    425 West Broadway                          2.0             13       17.72           19.35             20.11
    303 Glenoaks(5)                            5.2             22       20.03           20.35             21.57
    70 South Lake                              2.5             10       18.65           20.80             24.38
LOS ANGELES SOUTH
<S>                                       <C>             <C>          <C>         <C>               <C>
 LONG BEACH
    4811 Airport Plaza Drive                   1.6              1        9.12            8.64             24.54
    4900/10 Airport Plaza Drive                1.7              1        8.22            7.80             24.54
    5000 East Spring                           4.1             26       18.41           18.76             24.67
    100 West Broadway                          5.2             26       22.08           20.42             19.55
 CERRITOS/NORWALK
    12501 East Imperial Highway (5)            2.8              4       16.71           16.27             18.40
ORANGE COUNTY
- ----------------------------------------
<S>                                       <C>             <C>          <C>         <C>               <C>
 WEST COUNTY
    5832 Bolsa Avenue                          1.0              1       13.20           13.35             16.06
 TRI-FREEWAY AREA
    Anaheim City Centre                        3.7             13       15.47           15.07             19.29
SAN DIEGO COUNTY
- ----------------------------------------
<S>                                       <C>             <C>          <C>         <C>               <C>
 SAN DIEGO MARKET
    Imperial Bank Tower                       12.1             42       19.14           18.31             21.71
                                            ------            ---      ---------      -------           -------
Total/Weighted Average                       100.0%           543
Weighted Average Rent Per Leased Square                                 18$.62         $18.70
Weighted Average Rent Per Leased Square                                 18$.94(6)      $20.03(6)         $21.61
Weighted Average Rent Per Leased Square                                 11$.99         $11.52
</TABLE>
    
 
- ----------------------------------------
   
(1)  Annualized Net  Effective Rent  is calculated for  each lease  in effect at
    August 1, 1996. For leases in effect  at the time the relevant Property  was
    acquired,  Annualized  Net  Effective  Rent is  calculated  by  dividing the
    remaining lease payments under the lease  by the number of months  remaining
    under  the lease and multiplying  the result by 12.  For leases entered into
    after the relevant Property was  acquired, Annualized Net Effective Rent  is
    calculated  by dividing all lease payments under  the lease by the number of
    months in the  lease and multiplying  the result  by 12. For  leases at  the
    Acquisition  Properties  (303  Glenoaks  and  1250  East  Imperial Highway),
    Annualized Net Effective Rent is calculated by assuming the Properties  were
    acquired  on August  1, 1996  and by  dividing the  remaining lease payments
    under the  lease by  the number  of  months remaining  under the  lease  and
    multiplying  the  result by  12.  The foregoing  amounts  were in  all cases
    adjusted for tenant improvements  and leasing commissions,  if any, paid  or
    payable  by the Company  and reflect adjustments  for the Company's expected
    future capital expenditures per square foot  of $0.18 which is greater  than
    its historical capital expenditures per square foot.
    
   
(2)  Annualized Base  Rent is the  monthly contractual base  rent under existing
    leases as of August 1, 1996 and multiplied by 12. The amounts in this column
    that exceed the counterpart amounts  under the column headed Annualized  Net
    Effective Rent Per Leased Square Foot do so primarily because the amounts in
    this column do not reflect future scheduled rent increases.
    
(3)  Represents the mid-point of the range of the weighted average annual asking
    rents (for full service gross leases  only, excluding leases subject to  net
    lease  provisions) for the respective C&W  Peer Group properties as of April
    30, 1996.  It  should be  noted  for purposes  of  the Peer  Group  analyses
    appearing  in this Prospectus  that reported asking rents  do not purport to
    necessarily reflect the  rental rates  at which properties  may actually  be
    rented.  In  many instances,  asking rents  and  actual rental  rates differ
    significantly.
(4) Skyview  Center consists  of two  Class  A 11-  and 12-story  office  towers
    completed in 1981 and 1987, respectively.
(5) Acquisition Property to be acquired concurrently with the Offering.
(6) The weighted average rent per leased square foot is calculated based only on
    rent  which is  received from  tenants under  gross leases,  which represent
    approximately 84% of the  total portfolio leased  square feet. Excluded  are
    5601  Lindero Canyon, 4811 Airport Plaza Drive, 4900/10 Airport Plaza Drive,
    5832 Bolsa Avenue, 55.6% of leased  space at 400 Corporate Pointe leased  to
    Pepperdine  University,  and 48.3%  of  leased space  at  Calabasas Commerce
    Center leased to two tenants.
 
                                       62
<PAGE>
TENANTS
 
    The Properties are leased to over 540 tenants which are engaged in a variety
of  businesses,  including  financial   services,  entertainment,  health   care
services,  accounting, law,  computer technology, education  and publishing. The
following table sets forth information  regarding the Company's leases with  its
20 largest tenants based upon Annualized Base Rent as of August 1, 1996:
 
TENANT DIVERSIFICATION
 
<TABLE>
<CAPTION>
                                                                                                          PERCENTAGE OF
                                                                              PERCENTAGE OF                 AGGREGATE
                                          NUMBER    REMAINING     AGGREGATE     AGGREGATE     ANNUALIZED    PORTFOLIO
                                            OF    LEASE TERM IN   RENTABLE    LEASED SQUARE   BASE RENT    ANNUALIZED
                                          LEASES     MONTHS      SQUARE FEET      FEET         ($000S)      BASE RENT
                                          ------  -------------  -----------  -------------   ----------  -------------
<S>                                       <C>     <C>            <C>          <C>             <C>         <C>
McDonnell Douglas.......................     2           111        272,013       7.58%       $   2,224       3.31%
GTE California..........................     2            38        113,127       3.15%           1,653       2.46%
Pepperdine University...................     2            75         82,441       2.30%           1,628       2.42%
Logicon, Inc............................     1            71         74,174       2.07%           1,575       2.35%
Merrill Lynch...........................     2            51         47,818       1.33%           1,317       1.96%
Imperial Bank Realty Co.................     2            46         38,855       1.08%           1,275       1.90%
Earth Techonology.......................     2            80         44,122       1.23%           1,138       1.70%
Latham & Watkins........................     1            91         56,425       1.57%           1,045       1.56%
Grey Advertising........................     2           111         50,152       1.40%             993       1.48%
DiC Entertainment.......................     1            76         51,708       1.44%             993       1.48%
The Hearst Corporation..................     1            45         25,731       0.72%             932       1.39%
NME Hospitals...........................     1            41         24,069       0.67%             829       1.24%
Gruntal & Company.......................     1            10         15,321       0.43%             739       1.10%
Intracorp...............................     1            24         54,179       1.51%             691       1.03%
Smith Barney, Inc.......................     2            66         24,736       0.69%             678       1.01%
XIRCOM, Inc.............................     1            11         46,321       1.29%             673       1.00%
Crawford & Company......................     1            19         20,347       0.57%             623       0.93%
Candle Corporation......................     1            74         52,130       1.45%             601       0.89%
JB Oxford Holdings......................     1            74         18,796       0.52%             595       0.89%
Deloitte & Touche.......................     1            53         30,279       0.84%             581       0.87%
                                            --
                                                         ---     -----------     -----        ----------     -----
    TOTAL/WEIGHTED AVERAGE..............    28            71   (1)  1,142,744    31.83%       $  20,782      30.95%
</TABLE>
 
- ------------------------------
(1)  Weighted  average calculation  based on  aggregate rentable  square footage
    leased by each tenant.
 
LEASE DISTRIBUTIONS
 
    The following table sets forth  information relating to the distribution  of
the Company's leases, based on rentable square feet under lease, as of August 1,
1996:
 
<TABLE>
<CAPTION>
                                                                          PERCENT OF
                                                                          AGGREGATE                   PERCENTAGE OF
                                                                          PORTFOLIO                     AGGREGATE
                                          NUMBER  PERCENT                   LEASED      ANNUALIZED      PORTFOLIO
SQUARE FEET                                 OF    OF ALL   TOTAL LEASED     SQUARE      BASE RENT       ANNUALIZED
UNDER LEASE                               LEASES  LEASES   SQUARE FEET       FEET        ($000S)        BASE RENT
- ----------------------------------------  ------  -------  ------------  ------------   ----------  ------------------
<S>                                       <C>     <C>      <C>           <C>            <C>         <C>
2,500 or Less...........................   252     46.41 %     337,740         9.41%    $   6,350         9.46%
2,501--5,000............................   114     20.99 %     400,329        11.15%        7,608        11.33%
5,001--7,500............................    51      9.39 %     322,644         8.99%        6,382         9.51%
7,501--10,000...........................    39      7.18 %     340,700         9.49%        6,870        10.23%
10,001--20,000..........................    54      9.94 %     777,549        21.66%       16,400        24.43%
20,001--40,000..........................    20      3.68 %     508,278        14.16%       10,940        16.29%
40,001+.................................    13      2.39 %     903,137        25.15%       12,592        18.75%
                                          ------  -------  ------------      ------     ----------      ------
    TOTAL...............................   543    100.00 %   3,590,377       100.00%    $  67,142       100.00%
</TABLE>
 
                                       63
<PAGE>
LEASE EXPIRATIONS -- PORTFOLIO TOTAL
 
    The  following table sets forth a  summary schedule of the lease expirations
for the Properties for leases in place as of August 1, 1996, assuming that  none
of  the tenants exercise  renewal options or  termination rights, if  any, at or
prior to the scheduled expirations:
 
<TABLE>
<CAPTION>
    YEAR OF         NUMBER OF     SQUARE FOOTAGE   PERCENTAGE OF    ANNUALIZED BASE         PERCENTAGE OF
     LEASE           LEASES        OF EXPIRING     TOTAL LEASED    RENT OF EXPIRING    ANNUALIZED BASE RENT OF
  EXPIRATION        EXPIRING          LEASES        SQUARE FEET     LEASES ($000S)         EXPIRING LEASES
- ---------------  ---------------  --------------  ---------------  -----------------  -------------------------
<S>              <C>              <C>             <C>              <C>                <C>
        1996   (1)           53        128,941           3.59%         $   2,514                  3.74%
        1997               93          336,683           9.38%             7,851                 11.69%
        1998              101          440,697          12.27%             8,561                 12.75%
        1999               89          429,673          11.97%             7,972                 11.87%
        2000               79          484,401          13.49%            10,290                 15.33%
        2001               55          310,952           8.66%             5,651                  8.42%
        2002               24          588,165          16.38%            10,601                 15.79%
        2003               13          132,428           3.69%             2,711                  4.04%
        2004               13          195,075           5.43%             3,595                  5.35%
        2005               14          416,441          11.60%             4,708                  7.01%
        2006                5           91,279           2.54%             1,973                  2.94%
        2008                3           28,238           0.79%               535                  0.80%
        2010                1            7,404           0.21%               179                  0.27%
                          ---     --------------       ------            -------                ------
 TOTAL                    543        3,590,377         100.00%         $  67,142                100.00%
</TABLE>
 
- ------------------------------
(1) Represents lease expirations data from August 1, 1996 to December 31, 1996.
 
                                       64
<PAGE>
LEASE EXPIRATIONS - PROPERTY BY PROPERTY
 
    The following table  sets forth  detailed lease  expiration information  for
each  of the Properties for leases in place  as of August 1, 1996, assuming that
none of the tenants exercise renewal  options or termination rights, if any,  at
or prior to the scheduled expirations.
<TABLE>
<CAPTION>
YEAR OF LEASE EXPIRATION                  1996(1)      1997       1998      1999       2000        2001       2002      2003
- ----------------------------------------  --------  ----------  --------  --------  ----------  ----------  --------  --------
 
<S>                                       <C>       <C>         <C>       <C>       <C>         <C>         <C>       <C>
9665 WILSHIRE
Square Footage of Expiring Leases.......     1,151      33,586     8,362    19,296      35,869       1,296    34,117
Percentage of Total Leased Sq. Ft.......      0.76%      22.26%     5.54%    12.79%      23.77%       0.86%    22.61%
Annualized Base Rent of Expiring
 Leases.................................  $ 31,077  $1,457,826  $228,195  $489,933  $1,061,873  $   33,437  $1,064,071
Percentage of Total Annualized Base
 Rent...................................      0.65%      30.72%     4.81%    10.32%      22.38%       0.70%    22.42%
Number of Leases Expiring...............         1           3         2         2           6           1         2
 
BEVERLY ATRIUM
Square Footage of Expiring Leases.......     4,800       2,608    13,015     4,290       6,261                18,489
Percentage of Total Leased Sq. Ft.......      7.83%       4.25%    21.23%     7.00%      10.21%                30.15%
Annualized Base Rent of Expiring
 Leases.................................  $ 97,920  $   63,739  $250,027  $124,317  $  159,511              $399,362
Percentage of Total Annualized Base
 Rent...................................      7.00%       4.55%    17.86%     8.88%      11.40%                28.53%
Number of Leases Expiring...............         1           1         2         2           2                     1
 
CENTURY PARK CENTER
Square Footage of Expiring Leases.......    13,341      24,615    28,060    26,623      46,782       6,963    32,298     8,754
Percentage of Total Leased Sq. Ft.......      6.59%      12.15%    13.85%    13.14%      23.09%       3.44%    15.94%     4.32%
Annualized Base Rent of Expiring
 Leases.................................  $275,282  $  532,553  $545,857  $553,555  $1,242,862  $   88,212  $539,718  $167,702
Percentage of Total Annualized Base
 Rent...................................      6.36%      12.30%    12.60%    12.78%      28.69%       2.04%    12.46%     3.87%
Number of Leases Expiring...............        14          16        15        13           8           5         3         3
 
WESTWOOD TERRACE
Square Footage of Expiring Leases.......       186       6,307     7,123    25,940      58,623       5,128     8,524
Percentage of Total Leased Sq. Ft.......      0.17%       5.64%     6.37%    23.20%      52.42%       4.59%     7.62%
Annualized Base Rent of Expiring
 Leases.................................  $  2,902  $  119,425  $144,011  $525,439  $1,743,193  $   99,780  $194,347
Percentage of Total Annualized Base
 Rent...................................      0.10%       4.22%     5.09%    18.57%      61.62%       3.53%     6.87%
Number of Leases Expiring...............         1           3         2         6           6           2         1
 
1950 SAWTELLE
Square Footage of Expiring Leases.......     4,150      24,457    40,032       775       7,624       1,853
Percentage of Total Leased Sq. Ft.......      5.16%      30.43%    49.81%     0.96%       9.49%       2.31%
Annualized Base Rent of Expiring
 Leases.................................  $ 87,230  $  501,323  $792,397  $ 13,950  $  150,955  $   29,087
Percentage of Total Annualized Base
 Rent...................................      5.42%      31.17%    49.26%     0.87%       9.38%       1.81%
Number of Leases Expiring...............         4           9         9         1           4           2
 
<CAPTION>
YEAR OF LEASE EXPIRATION                     2004      2005      2006      2008      2010      TOTAL
- ----------------------------------------  ----------  -------  --------  --------  --------  ----------
<S>                                       <C>         <C>      <C>       <C>       <C>       <C>
9665 WILSHIRE
Square Footage of Expiring Leases.......      17,222                                            150,899
Percentage of Total Leased Sq. Ft.......       11.41%                                               100%
Annualized Base Rent of Expiring
 Leases.................................  $  379,005                                         $4,745,417
Percentage of Total Annualized Base
 Rent...................................        7.99%                                               100%
Number of Leases Expiring...............           1                                                 18
BEVERLY ATRIUM
Square Footage of Expiring Leases.......       4,447                                  7,404      61,314
Percentage of Total Leased Sq. Ft.......        7.25%                                 12.08%        100%
Annualized Base Rent of Expiring
 Leases.................................  $  125,405                               $179,400  $1,399,681
Percentage of Total Annualized Base
 Rent...................................        8.96%                                 12.82%        100%
Number of Leases Expiring...............           1                                      1          11
CENTURY PARK CENTER
Square Footage of Expiring Leases.......      11,938    3,207                                   202,581
Percentage of Total Leased Sq. Ft.......        5.89%    1.58%                                      100%
Annualized Base Rent of Expiring
 Leases.................................  $  310,504  $75,044                                $4,331,289
Percentage of Total Annualized Base
 Rent...................................        7.17%    1.73%                                      100%
Number of Leases Expiring...............           2        1                                        80
WESTWOOD TERRACE
Square Footage of Expiring Leases.......                                                        111,831
Percentage of Total Leased Sq. Ft.......                                                            100%
Annualized Base Rent of Expiring
 Leases.................................                                                     $2,829,097
Percentage of Total Annualized Base
 Rent...................................                                                            100%
Number of Leases Expiring...............                                                             21
1950 SAWTELLE
Square Footage of Expiring Leases.......       1,476                                             80,367
Percentage of Total Leased Sq. Ft.......        1.84%                                               100%
Annualized Base Rent of Expiring
 Leases.................................  $   33,653                                         $1,608,595
Percentage of Total Annualized Base
 Rent...................................        2.09%                                               100%
Number of Leases Expiring...............           1                                                 30
</TABLE>
 
- ----------------------------------
(1) Represents lease expirations data from August 1, 1996 to December 31, 1996.
 
                                       65
<PAGE>
<TABLE>
<CAPTION>
YEAR OF LEASE EXPIRATION                          1996(1)     1997       1998       1999       2000       2001       2002
- -----------------------------------------------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
 
<S>                                              <C>        <C>        <C>        <C>        <C>        <C>        <C>
400 CORPORATE POINTE
Square Footage of Expiring Leases..............      1,994      8,856     23,544      4,328     14,253                81,708
Percentage of Total Leased Sq. Ft..............       1.34%      5.97%     15.87%      2.92%      9.61%                55.07%
Annualized Base Rent of Expiring Leases........  $  39,349  $ 131,377  $ 675,670  $  61,459  $ 217,783             $1,614,521
Percentage of Total Annualized Base Rent.......       1.33%      4.45%     22.87%      2.08%      7.37%                54.66%
Number of Leases Expiring......................          2          3          3          2          2                     1
 
BRISTOL PLAZA
Square Footage of Expiring Leases..............      1,565      3,909     23,874     14,027     12,113     10,527
Percentage of Total Leased Sq. Ft..............       2.37%      5.92%     36.16%     21.25%     18.35%     15.95%
Annualized Base Rent of Expiring Leases........  $  22,800  $  91,442  $ 470,786  $ 221,947  $ 187,246  $ 200,820
Percentage of Total Annualized Base Rent.......       1.91%      7.65%     39.39%     18.57%     15.67%     16.80%
Number of Leases Expiring......................          1          3          6          3          5          1
 
SKYVIEW CENTER
Square Footage of Expiring Leases..............      4,878     26,259     22,447     14,481     16,989     20,939     95,753
Percentage of Total Leased Sq. Ft..............       1.45%      7.79%      6.66%      4.30%      5.04%      6.21%     28.42%
Annualized Base Rent of Expiring Leases........  $  83,556  $ 452,873  $ 355,775  $ 209,263  $ 217,936  $ 314,404  $1,886,193
Percentage of Total Annualized Base Rent.......       1.46%      7.90%      6.21%      3.65%      3.80%      5.49%     32.92%
Number of Leases Expiring......................          3          9         11          8          4          4          2
 
THE NEW WILSHIRE
Square Footage of Expiring Leases..............     24,056     25,219     28,415                 6,652     25,452
Percentage of Total Leased Sq. Ft..............      14.15%     14.84%     16.72%                 3.91%     14.98%
Annualized Base Rent of Expiring Leases........  $ 338,570  $ 527,241  $ 724,442             $ 119,830  $ 564,201
Percentage of Total Annualized Base Rent.......       9.79%     15.25%     20.95%                 3.47%     16.32%
Number of Leases Expiring......................          4         11          7                     3          3
 
5601 LINDERO CANYON
Square Footage of Expiring Leases..............                                                                      105,830
Percentage of Total Leased Sq. Ft..............                                                                       100.00%
Annualized Base Rent of Expiring Leases........                                                                    $1,180,498
Percentage of Total Annualized Base Rent.......                                                                       100.00%
Number of Leases Expiring......................                                                                            2
 
<CAPTION>
YEAR OF LEASE EXPIRATION                           2003       2004       2005       2006       2008       2010       TOTAL
 
- -----------------------------------------------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
 
<S>                                              <C>        <C>        <C>        <C>        <C>        <C>        <C>
400 CORPORATE POINTE
Square Footage of Expiring Leases..............                           13,696                                     148,379
 
Percentage of Total Leased Sq. Ft..............                             9.23%                                        100%
 
Annualized Base Rent of Expiring Leases........                        $ 213,658                                   $2,953,817
 
Percentage of Total Annualized Base Rent.......                             7.23%                                        100%
 
Number of Leases Expiring......................                                1                                          14
 
BRISTOL PLAZA
Square Footage of Expiring Leases..............                                                                       66,015
 
Percentage of Total Leased Sq. Ft..............                                                                          100%
 
Annualized Base Rent of Expiring Leases........                                                                    $1,195,041
 
Percentage of Total Annualized Base Rent.......                                                                          100%
 
Number of Leases Expiring......................                                                                           19
 
SKYVIEW CENTER
Square Footage of Expiring Leases..............     34,603     40,089     34,145     26,334                          336,917
 
Percentage of Total Leased Sq. Ft..............      10.27%     11.90%     10.13%      7.82%                             100%
 
Annualized Base Rent of Expiring Leases........  $ 651,495  $ 486,983  $ 446,617  $ 624,816                        $5,729,911
 
Percentage of Total Annualized Base Rent.......      11.37%      8.50%      7.79%     10.90%                             100%
 
Number of Leases Expiring......................          3          2          1          2                               49
 
THE NEW WILSHIRE
Square Footage of Expiring Leases..............                           12,513     47,652                          169,959
 
Percentage of Total Leased Sq. Ft..............                             7.36%     28.04%                             100%
 
Annualized Base Rent of Expiring Leases........                        $ 240,250  $ 943,510                        $3,458,044
 
Percentage of Total Annualized Base Rent.......                             6.95%     27.28%                             100%
 
Number of Leases Expiring......................                                2          1                               31
 
5601 LINDERO CANYON
Square Footage of Expiring Leases..............                                                                      105,830
 
Percentage of Total Leased Sq. Ft..............                                                                          100%
 
Annualized Base Rent of Expiring Leases........                                                                    $1,180,498
 
Percentage of Total Annualized Base Rent.......                                                                          100%
 
Number of Leases Expiring......................                                                                            2
 
</TABLE>
 
- ----------------------------------
(1) Represents lease expirations data from August 1, 1996 to December 31, 1996.
 
                                       66
<PAGE>
<TABLE>
<CAPTION>
YEAR OF LEASE EXPIRATION                        1996(1)     1997       1998       1999       2000       2001       2002
- ---------------------------------------------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
 
<S>                                            <C>        <C>        <C>        <C>        <C>        <C>        <C>
CALABASAS COMMERCE CENTER
Square Footage of Expiring Leases............      9,128     59,477      4,413     18,249     11,770     10,841
Percentage of Total Leased Sq. Ft............       7.41%     48.31%      3.58%     14.82%      9.56%      8.81%
Annualized Base Rent of Expiring Leases......  $ 228,930  $ 863,606  $ 110,798  $ 325,385  $ 196,357  $ 208,147
Percentage of Total Annualized Base Rent.....      10.85%     40.92%      5.25%     15.42%      9.30%      9.86%
Number of Leases Expiring....................          1          2          1          3          2          1
 
WOODLAND HILLS FINANCIAL CENTER
Square Footage of Expiring Leases............     13,903     14,718     39,969     33,534     37,245     33,454
Percentage of Total Leased Sq. Ft............       6.89%      7.29%     19.80%     16.61%     18.45%     16.57%
Annualized Base Rent of Expiring Leases......  $ 266,048  $ 327,937  $ 875,336  $ 703,753  $ 946,244  $ 684,216
Percentage of Total Annualized Base Rent.....       5.91%      7.29%     19.45%     15.64%     21.02%     15.20%
Number of Leases Expiring....................          6          9         12         13         10          6
 
16000 VENTURA BLVD.
Square Footage of Expiring Leases............     12,374     45,342     29,564     35,411      3,478     20,783
Percentage of Total Leased Sq. Ft............       8.42%     30.85%     20.12%     24.10%      2.37%     14.14%
Annualized Base Rent of Expiring Leases......  $ 294,056  $1,062,848 $ 576,922  $ 561,993  $  63,710  $ 410,569
Percentage of Total Annualized Base Rent.....       9.90%     35.78%     19.42%     18.92%      2.15%     13.82%
Number of Leases Expiring....................          5         10          8          8          2          6
 
425 WEST BROADWAY
Square Footage of Expiring Leases............                 5,749     22,259     29,540      4,308      6,780
Percentage of Total Leased Sq. Ft............                  8.38%     32.43%     43.04%      6.28%      9.88%
Annualized Base Rent of Expiring Leases......             $ 106,546  $ 434,241  $ 573,892  $  90,468  $ 123,209
Percentage of Total Annualized Base Rent.....                  8.02%     32.69%     43.20%      6.81%      9.28%
Number of Leases Expiring....................                     2          4          4          1          2
 
303 GLENOAKS
Square Footage of Expiring Leases............        739      2,700      8,570      5,418     35,045     54,527     51,708
Percentage of Total Leased Sq. Ft............       0.43%      1.58%      5.01%      3.17%     20.51%     31.91%     30.26%
Annualized Base Rent of Expiring Leases......  $   8,868  $  55,053  $ 192,508  $ 105,280  $ 708,116  $1,164,262 $ 992,794
Percentage of Total Annualized Base Rent.....       0.26%      1.58%      5.54%      3.03%     20.37%     33.49%     28.55%
Number of Leases Expiring....................          1          1          3          2          7          5          1
 
<CAPTION>
YEAR OF LEASE EXPIRATION                         2003       2004       2005       2006       2008       2010       TOTAL
- ---------------------------------------------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
<S>                                            <C>        <C>        <C>        <C>        <C>        <C>        <C>
CALABASAS COMMERCE CENTER
Square Footage of Expiring Leases............                            9,243                                     123,121
Percentage of Total Leased Sq. Ft............                             7.51%                                        100%
 
Annualized Base Rent of Expiring Leases......                        $ 177,466                                   $2,110,689
Percentage of Total Annualized Base Rent.....                             8.41%                                        100%
 
Number of Leases Expiring....................                                1                                          11
WOODLAND HILLS FINANCIAL CENTER
Square Footage of Expiring Leases............     19,600                   489      8,983                          201,895
Percentage of Total Leased Sq. Ft............       9.71%                 0.24%      4.45%                             100%
 
Annualized Base Rent of Expiring Leases......  $ 505,680             $  36,600  $ 155,226                        $4,501,040
Percentage of Total Annualized Base Rent.....      11.23%                 0.81%      3.45%                             100%
 
Number of Leases Expiring....................          1                     1          1                               59
16000 VENTURA BLVD.
Square Footage of Expiring Leases............                                                                      146,952
Percentage of Total Leased Sq. Ft............                                                                          100%
 
Annualized Base Rent of Expiring Leases......                                                                    $2,970,098
Percentage of Total Annualized Base Rent.....                                                                          100%
 
Number of Leases Expiring....................                                                                           39
425 WEST BROADWAY
Square Footage of Expiring Leases............                                                                       68,636
Percentage of Total Leased Sq. Ft............                                                                          100%
 
Annualized Base Rent of Expiring Leases......                                                                    $1,328,356
Percentage of Total Annualized Base Rent.....                                                                          100%
 
Number of Leases Expiring....................                                                                           13
303 GLENOAKS
Square Footage of Expiring Leases............                 1,039     11,142                                     170,888
Percentage of Total Leased Sq. Ft............                  0.61%      6.52%                                        100%
 
Annualized Base Rent of Expiring Leases......             $  19,949  $ 229,971                                   $3,476,801
Percentage of Total Annualized Base Rent.....                  0.57%      6.61%                                        100%
 
Number of Leases Expiring....................                     1          1                                          22
</TABLE>
 
- ----------------------------------
(1) Represents lease expiration data from August 1, 1996 to December 31, 1996.
 
                                       67
<PAGE>
<TABLE>
<CAPTION>
YEAR OF LEASE EXPIRATION                      1996(1)     1997       1998       1999       2000       2001       2002       2003
- -------------------------------------------  ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
 
<S>                                          <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>
70 SOUTH LAKE
Square Footage of Expiring Leases..........                            8,394     31,886     40,054      1,150
Percentage of Total Leased Sq. Ft..........                            10.30%     39.13%     49.16%      1.41%
Annualized Base Rent of Expiring Leases....                        $ 151,092  $ 736,461  $ 783,166  $  24,150
Percentage of Total Annualized Base Rent...                             8.91%     43.45%     46.21%      1.42%
Number of Leases Expiring..................                                1          4          4          1
 
4811 AIRPORT PLAZA DRIVE
Square Footage of Expiring Leases..........
Percentage of Total Leased Sq. Ft..........
Annualized Base Rent of Expiring Leases....
Percentage of Total Annualized Base Rent...
Number of Leases Expiring..................
 
4900/10 AIRPORT PLAZA DRIVE
Square Footage of Expiring Leases..........
Percentage of Total Leased Sq. Ft..........
Annualized Base Rent of Expiring Leases....
Percentage of Total Annualized Base Rent...
Number of Leases Expiring..................
 
5000 EAST SPRING
Square Footage of Expiring Leases..........     13,269      4,843      2,877     29,199     49,931     23,521      6,654     13,588
Percentage of Total Leased Sq. Ft..........       9.06%      3.31%      1.96%     19.94%     34.10%     16.06%      4.54%      9.28%
Annualized Base Rent of Expiring Leases....  $ 289,048  $ 113,326  $  51,786  $ 600,554  $ 948,059  $ 311,328  $ 128,555  $ 255,998
Percentage of Total Annualized Base Rent...      10.52%      4.13%      1.88%     21.86%     34.51%     11.33%      4.68%      9.32%
Number of Leases Expiring..................          4          1          2          5          6          5          1          1
 
100 WEST BROADWAY
Square Footage of Expiring Leases..........      1,725      8,147     17,012      8,434      4,806     17,222     47,184     20,385
Percentage of Total Leased Sq. Ft..........       1.00%      4.72%      9.86%      4.89%      2.79%      9.98%     27.35%     11.82%
Annualized Base Rent of Expiring Leases....  $  26,910  $ 231,712  $ 278,539  $ 140,105  $  70,104  $ 270,081  $ 829,892  $ 463,465
Percentage of Total Annualized Base Rent...       0.76%      6.58%      7.91%      3.98%      1.99%      7.67%     23.56%     13.16%
Number of Leases Expiring..................          1          2          5          5          2          3          3          2
 
<CAPTION>
YEAR OF LEASE EXPIRATION                       2004       2005       2006       2008       2010       TOTAL
- -------------------------------------------  ---------  ---------  ---------  ---------  ---------  ---------
<S>                                          <C>        <C>        <C>        <C>        <C>        <C>
70 SOUTH LAKE
Square Footage of Expiring Leases..........                                                            81,484
Percentage of Total Leased Sq. Ft..........                                                               100%
Annualized Base Rent of Expiring Leases....                                                         $1,694,869
Percentage of Total Annualized Base Rent...                                                               100%
Number of Leases Expiring..................                                                                10
4811 AIRPORT PLAZA DRIVE
Square Footage of Expiring Leases..........               121,610                                     121,610
Percentage of Total Leased Sq. Ft..........                100.00%                                        100%
Annualized Base Rent of Expiring Leases....             $1,050,710                                  $1,050,710
Percentage of Total Annualized Base Rent...                100.00%                                        100%
Number of Leases Expiring..................                     1                                           1
4900/10 AIRPORT PLAZA DRIVE
Square Footage of Expiring Leases..........               150,403                                     150,403
Percentage of Total Leased Sq. Ft..........                100.00%                                        100%
Annualized Base Rent of Expiring Leases....             $1,173,143                                  $1,173,143
Percentage of Total Annualized Base Rent...                100.00%                                        100%
Number of Leases Expiring..................                     1                                           1
5000 EAST SPRING
Square Footage of Expiring Leases..........      2,532                                                146,414
Percentage of Total Leased Sq. Ft..........       1.73%                                                   100%
Annualized Base Rent of Expiring Leases....  $  48,614                                              $2,747,268
Percentage of Total Annualized Base Rent...       1.77%                                                   100%
Number of Leases Expiring..................          1                                                     26
100 WEST BROADWAY
Square Footage of Expiring Leases..........     37,494      3,352                 6,730               172,491
Percentage of Total Leased Sq. Ft..........      21.74%      1.94%                 3.90%                  100%
Annualized Base Rent of Expiring Leases....  $1,034,834 $  60,336             $ 117,000             $3,522,978
Percentage of Total Annualized Base Rent...      29.37%      1.71%                 3.32%                  100%
Number of Leases Expiring..................          1          1                     1                    26
</TABLE>
 
- ----------------------------------
(1) Represents lease expirations data from August 1, 1996 to December 31, 1996.
 
                                       68
<PAGE>
<TABLE>
<CAPTION>
YEAR OF LEASE EXPIRATION                   1996(1)     1997       1998       1999        2000       2001        2002       2003
- ----------------------------------------  ---------  ---------  ---------  ---------  ----------  ---------  ----------  ---------
 
<S>                                       <C>        <C>        <C>        <C>        <C>         <C>        <C>         <C>
12501 EAST IMPERIAL HIGHWAY
Square Footage of Expiring Leases.......                           27,913     63,772                 23,986
Percentage of Total Leased Sq. Ft.......                            24.13%     55.13%                 20.74%
Annualized Base Rent of Expiring
 Leases.................................                        $ 497,410  $ 993,778              $ 390,593
Percentage of Total Annualized Base
 Rent...................................                            26.43%     52.81%                 20.76%
Number of Leases Expiring...............                                1          1                      2
 
5832 BOLSA AVENUE
Square Footage of Expiring Leases.......                                                  49,355
Percentage of Total Leased Sq. Ft.......                                                  100.00%
Annualized Base Rent of Expiring
 Leases.................................                                              $  658,830
Percentage of Total Annualized Base
 Rent...................................                                                  100.00%
Number of Leases Expiring...............                                                       1
 
ANAHEIM CITY CENTRE
Square Footage of Expiring Leases.......                 4,732     56,397     48,768                 12,477      32,373
Percentage of Total Leased Sq. Ft.......                  2.90%     34.59%     29.91%                  7.65%      19.85%
Annualized Base Rent of Expiring
 Leases.................................             $  79,480  $ 730,269  $ 777,623              $ 212,144  $  408,922
Percentage of Total Annualized Base
 Rent...................................                  3.23%     29.71%     31.64%                  8.63%      16.64%
Number of Leases Expiring...............                     2          2          4                      2           2
 
IMPERIAL BANK TOWER
Square Footage of Expiring Leases.......     21,682     35,159     28,457     15,702      43,243     34,053      73,527     35,498
Percentage of Total Leased Sq. Ft.......       4.88%      7.91%      6.40%      3.53%       9.73%      7.66%      16.55%      7.99%
Annualized Base Rent of Expiring
 Leases.................................  $ 421,572  $1,133,019 $ 475,210  $ 253,268  $  723,785  $ 522,359  $1,361,766  $ 666,911
Percentage of Total Annualized Base
 Rent...................................       5.18%     13.93%      5.84%      3.11%       8.90%      6.42%      16.74%      8.20%
Number of Leases Expiring...............          4          6          5          3           4          4           5          3
 
PORTFOLIO TOTALS
Square Footage of Expiring Leases.......    128,941    336,683    440,697    429,673     484,401    310,952     588,165    132,428
Percentage of Total Leased Sq. Ft.......       3.59%      9.38%     12.27%     11.97%      13.49%      8.66%      16.38%      3.69%
Annualized Base Rent of Expiring
 Leases.................................  $2,514,118 $7,851,326 $8,561,271 $7,971,955 $10,290,028 $5,650,999 $10,600,639 $2,711,251
Percentage of Total Annualized Base
 Rent...................................       3.74%     11.69%     12.75%     11.87%      15.33%      8.42%      15.79%      4.04%
Number of Leases Expiring...............         53         93        101         89          79         55          24         13
 
<CAPTION>
YEAR OF LEASE EXPIRATION                    2004       2005       2006       2008       2010       TOTAL
- ----------------------------------------  ---------  ---------  ---------  ---------  ---------  ----------
<S>                                       <C>        <C>        <C>        <C>        <C>        <C>
12501 EAST IMPERIAL HIGHWAY
Square Footage of Expiring Leases.......                                                            115,671
Percentage of Total Leased Sq. Ft.......                                                                100%
Annualized Base Rent of Expiring
 Leases.................................                                                         $1,881,781
Percentage of Total Annualized Base
 Rent...................................                                                                100%
Number of Leases Expiring...............                                                                  4
5832 BOLSA AVENUE
Square Footage of Expiring Leases.......                                                             49,355
Percentage of Total Leased Sq. Ft.......                                                                100%
Annualized Base Rent of Expiring
 Leases.................................                                                         $  658,830
Percentage of Total Annualized Base
 Rent...................................                                                                100%
Number of Leases Expiring...............                                                                  1
ANAHEIM CITY CENTRE
Square Footage of Expiring Leases.......                            8,310                           163,057
Percentage of Total Leased Sq. Ft.......                             5.10%                              100%
Annualized Base Rent of Expiring
 Leases.................................                        $ 249,300                        $2,457,738
Percentage of Total Annualized Base
 Rent...................................                            10.14%                              100%
Number of Leases Expiring...............                                1                                13
IMPERIAL BANK TOWER
Square Footage of Expiring Leases.......     78,838     56,641                21,508                444,308
Percentage of Total Leased Sq. Ft.......      17.74%     12.75%                 4.84%                   100%
Annualized Base Rent of Expiring
 Leases.................................  $1,155,718 $1,004,432            $ 418,116             $8,136,156
Percentage of Total Annualized Base
 Rent...................................      14.20%     12.35%                 5.14%                   100%
Number of Leases Expiring...............          3          3                     2                     42
PORTFOLIO TOTALS
Square Footage of Expiring Leases.......    195,075    416,441     91,279     28,238      7,404   3,590,377
Percentage of Total Leased Sq. Ft.......       5.43%     11.60%      2.54%      0.79%      0.21%        100%
Annualized Base Rent of Expiring
 Leases.................................  $3,594,665 $4,708,227 $1,972,852 $ 535,116  $ 179,400  $67,141,847
Percentage of Total Annualized Base
 Rent...................................       5.35%      7.01%      2.94%      0.80%      0.27%        100%
Number of Leases Expiring...............         13         14          5          3          1         543
</TABLE>
 
- ----------------------------------------
(1) Represents lease expirations data from August 1, 1996 to December 31, 1996.
 
                                       69
<PAGE>
TENANT RETENTION AND EXPANSIONS
 
    The Company believes that its relationship with tenants contributes in large
part  to  its success  in attracting,  expanding and  retaining its  quality and
diverse  tenant  base.  The  Company  strives  to  develop  and  maintain   good
relationships  with tenants  through its  active management  style and  by being
responsive to individual tenants' needs. The Company services tenants  primarily
through  its on  site, professional  management staff.  Management believes that
tenant satisfaction fosters long-term tenant relationships and creates expansion
opportunities, which, in  turn, enhance  the Company's ability  to maintain  and
increase  occupancy rates. The Company's success in this area is demonstrated in
part by the number of existing tenants which have re-leased their space,  leased
additional space to support their expansion needs or moved to other space within
the  Company's portfolio. During 1994 and  1995, the Company expanded 10 tenants
by a total of over 12,400 square feet. Recently, the Company was able to  expand
and  move  California Pizza  Kitchen from  approximately  17,224 square  feet in
Westwood Terrace to approximately 21,579 square feet in Skyview Center.  Another
example  of  the Company's  ability to  capitalize  on relocation  and expansion
opportunities is the relocation of Stanford Business Systems from 400  Corporate
Pointe  to expanded space with  its new parent company  at Skyview Center, which
also allowed the  Company to accommodate  a 7,311 square  foot expansion at  400
Corporate  Pointe by Pepperdine University, the  largest tenant at 400 Corporate
Pointe.
 
HISTORICAL LEASE RENEWALS
 
    The following  table sets  forth  certain historical  information  regarding
tenants  at the  Properties who  renewed an  existing lease  at or  prior to the
expiration of the existing lease:
 
<TABLE>
<CAPTION>
                                                                                                                TOTAL/
                                                                                                   JAN. 1      WEIGHTED
                                                                                                 TO AUGUST 1    AVERAGE
                                                             1993         1994         1995         1996       1993-1996
                                                          -----------  -----------  -----------  -----------  -----------
<S>                                                       <C>          <C>          <C>          <C>          <C>
Number of leases expired during calendar year...........          3           28           33           47          111
Number of lease renewals................................          3           20           21           39           83
Percentage of leases renewed............................        100%          71%          64%          83%          75%
Aggregate rentable square footage of expiring leases....      2,870      112,539       99,577      134,520      349,506
Aggregate rentable square footage of lease renewals.....      2,870       92,057       75,213      116,699      286,839
Percentage of expiring rentable square footage
  renewed...............................................        100%          82%          76%          87%          82%
</TABLE>
 
                                       70
<PAGE>
HISTORICAL TENANT IMPROVEMENTS AND LEASING COMMISSIONS
 
    The following  table sets  forth  certain historical  information  regarding
Tenant Improvement ("TI") and Leasing Commission ("LC") costs for tenants at the
Properties.  Based on  square footage, the  majority of leases  signed relate to
Renewals and  Re-tenanted Space  (72%), while  leases signed  relating to  Shell
Space  comprised 28%. Shell Space remaining at the Properties is less than 2% of
the aggregate rentable square footage of the Properties.
 
<TABLE>
<CAPTION>
                                                                                      JANUARY 1     TOTAL/
                                                                                     TO AUGUST 1   WEIGHTED
                                                      1993       1994       1995        1996        AVERAGE
                                                    ---------  ---------  ---------  -----------  -----------
<S>                                                 <C>        <C>        <C>        <C>          <C>
RENEWALS
  Number of Leases                                          3         20         20(i)         39         82
  Square Feet of Renewals                               2,870     92,057     57,181(i)    116,699    268,807
  TI per square foot..............................     $ 3.58     $ 2.23     $ 4.67(i)     $ 5.46     $ 4.19
  LC per square foot..............................     $ 0.09     $ 3.44     $ 1.11(i)     $ 2.38     $ 2.37
                                                    ---------  ---------  ---------  -----------  -----------
      Total TI and LC per square foot.............     $ 3.67     $ 5.67     $ 5.78(i)     $ 7.84     $ 6.56
                                                    ---------  ---------  ---------  -----------  -----------
                                                    ---------  ---------  ---------  -----------  -----------
RE-TENANTED SPACE (II)
  Number of Leases                                          7         13         47          33          100
  Square Feet of Re-tenanted Space                      9,910     22,265    108,430      81,367      221,972
  TI per square foot..............................     $ 2.22     $ 9.04     $ 9.82      $ 7.04       $ 8.38
  LC per square foot..............................     $ 0.31     $ 2.72     $ 3.05      $ 3.36       $ 3.12
                                                    ---------  ---------  ---------  -----------  -----------
      Total TI and LC per square foot.............     $ 2.53     $11.76     $12.87      $10.70       $11.50
                                                    ---------  ---------  ---------  -----------  -----------
                                                    ---------  ---------  ---------  -----------  -----------
SHELL SPACE (III)
  Number of Leases                                          5          8         10          17           40
  Square Feet of Shell Space                           17,389     16,130     53,876     100,308      187,703
  TI per square foot..............................     $31.22     $36.25     $26.29      $21.17       $24.87
  LC per square foot..............................     $ 3.65     $ 7.19     $ 4.83      $ 6.17       $ 5.64
                                                    ---------  ---------  ---------  -----------  -----------
      Total TI and LC per square foot.............     $34.87     $43.44     $31.12      $27.34       $30.51
                                                    ---------  ---------  ---------  -----------  -----------
                                                    ---------  ---------  ---------  -----------  -----------
TOTAL
  Number of Leases                                         15         41         77          89          222
  Square Feet                                          30,169    130,452    219,487     298,374      678,482
  TI per square foot..............................     $19.06     $ 7.60     $12.52      $11.17       $11.30
  LC per square foot..............................     $ 2.22     $ 3.78     $ 2.98       $4.01       $ 3.54
                                                    ---------  ---------  ---------  -----------  -----------
      Total TI and LC per square foot.............     $21.28     $11.38     $15.50      $15.18       $14.84
                                                    ---------  ---------  ---------  -----------  -----------
                                                    ---------  ---------  ---------  -----------  -----------
</TABLE>
 
- ------------------------
      (i)
    Excludes tenant improvement  and leasing  commission costs  relating to  one
    lease  signed  at  Anaheim  City  Centre  for  which  the  Company  incurred
    substantial renovation costs in connection with a full floor retrofit.
 
     (ii)
    Does not include Shell Space build-out for 187,703 square feet.
 
    (iii)
    Shell Space remaining  at the Properties  is less than  2% of the  aggregate
    rentable space footage of the Properties.
 
                                       71
<PAGE>
HISTORICAL CAPITAL EXPENDITURES
    The  following  table  sets  forth information  relating  to  the historical
capital expenditures of the Company's Properties:
 
<TABLE>
<CAPTION>
                                                                                 1993        1994        1995
                                                                               ---------  ----------  ----------
<S>                                                                            <C>        <C>         <C>
Number of Properties (1).....................................................          3           8          10
Number of Square Feet........................................................    529,673   1,129,855   2,634,057
Capital Expenditures Incurred................................................  $   9,470  $   51,592  $  200,848
Weighted Average Capital Expenditures per square foot (2)....................  $    0.02  $     0.06  $     0.15
Three Year Weighted Average per square foot..................................                         $     0.10
</TABLE>
 
- ------------------------
(1) Represents the actual  number of Properties  for which capital  expenditures
    were incurred during the year.
 
(2)  For those Properties owned  less than a full  year, computes the per square
    foot amount by annualizing  the capital expenditures amount  to a pro  forma
    full year cost.
 
HISTORICAL OCCUPANCY
 
    The  table below sets  forth the weighted average  occupancy rates, based on
square feet leased,  of the  Properties owned by  the Company  at the  indicated
dates:
 
<TABLE>
<CAPTION>
                                                  APPROXIMATE AGGREGATE   PERCENTAGE OF RENTABLE
DATE                                              RENTABLE SQUARE FEET     SQUARE FEET OCCUPIED
- ------------------------------------------------  ---------------------  -------------------------
<S>                                               <C>                    <C>
December 31, 1993...............................           529,673                      84%
June 30, 1994...................................           635,503                      87%
December 31, 1994...............................         1,129,855                      82%
June 30, 1995...................................         1,408,468                      84%
December 31, 1995...............................         2,634,057                      88%
June 30, 1996...................................         3,547,107                      89%
</TABLE>
 
                   OFFICE SUBMARKETS AND PROPERTY INFORMATION
 
    The  Company owns  and operates  24 Properties  comprising approximately 4.0
million rentable square feet in suburban  Los Angeles County, Orange County  and
San  Diego County. The  following map shows the  relative geographic location of
Los Angeles County, Orange County and San Diego County.
 
       Map depicting Los Angeles County, Orange County and San Diego County.
 
                                       72
<PAGE>
    The Properties  are  located  in  a number  of  office  market  sectors  and
submarkets within these counties as outlined in the table below:
 
                     PROPERTY MARKET SECTORS AND SUBMARKETS
                              PROPERTY STATISTICS
                              AT DECEMBER 31, 1995
 
<TABLE>
<CAPTION>
                                                                             PERCENTAGE OF               PERCENTAGE
                                                                                 TOTAL                       OF
                                                                APPROXIMATE    PORTFOLIO      ADJUSTED    PORTFOLIO
                                                    NUMBER OF    RENTABLE      RENTABLE      BASE RENT   ANNUALIZED
                                                    PROPERTIES  SQUARE FEET   SQUARE FEET     ($000S)     BASE RENT
                                                    ----------  -----------  -------------   ----------  -----------
<S>                                                 <C>         <C>          <C>             <C>         <C>
LOS ANGELES COUNTY
  LOS ANGELES WEST OFFICE MARKET SECTOR
    West Los Angeles and Adjacent Submarkets......         6       905,821         22.4%        18,372       27.4%
    Culver City/Century Blvd. Submarkets..........         3       640,287         15.9          9,879       14.7
  LOS ANGELES NORTH OFFICE MARKET SECTOR
    Simi/Conejo Valley Submarkets.................         2       228,951          5.7          3,291        4.9
    West and Central San Fernando Valley
     Submarkets...................................         2       399,796          9.9          7,471       11.1
    East San Fernando Valley/Tri Cities
     Submarkets...................................         3       347,171          8.6          6,500        9.7
  LOS ANGELES SOUTH OFFICE MARKET SECTOR
    Long Beach and Cerritos/Norwalk Submarkets....         5       749,273         18.6         10,376       15.5
 
ORANGE COUNTY
    Anaheim Submarket.............................         1       175,391          4.3          2,458        3.7
    Huntington Beach Submarket....................         1        49,355          1.2            659        1.0
 
SAN DIEGO COUNTY
    Central City (downtown San Diego) Submarket...         1       540,413         13.4          8,136       12.1
                                                          --
                                                                -----------       -----      ----------     -----
    TOTAL.........................................        24     4,036,458        100.0%     $  67,142      100.0%
                                                          --
                                                          --
                                                                -----------       -----      ----------     -----
                                                                -----------       -----      ----------     -----
</TABLE>
 
                                       73
<PAGE>
LOS ANGELES COUNTY OFFICE MARKET AND PROPERTIES
 
    According  to the  C&W Market  Study, the  Los Angeles  County office market
contained office space  inventory of approximately  168 million rentable  square
feet which, as of December 31, 1995, had a direct vacancy rate of 18.7%. The Los
Angeles  County office market is divided by C&W into the following four sectors:
Los Angeles West, Los Angeles North, Los Angeles South/South Bay and Los Angeles
Central/ Downtown,  with  each of  the  sectors  in turn  composed  of  numerous
submarkets as illustrated on the map below.
 
                     Map of Los Angeles County showing location
        of Los Angeles North, Los Angeles West, Los Angeles Central and
                    Los Angeles South office market sectors.
 
    During 1995, 272,154 square feet of office space was absorbed on a net basis
in   the  four  Los  Angeles  County   sectors  inclusive  of  the  Los  Angeles
Central/Downtown sector  which had  net negative  absorption of  711,752  square
feet.  Excluding the net negative absorption of the Los Angeles Central/Downtown
sector, the remaining three sectors absorbed approximately 984,000 square  feet.
The  direct  vacancy  rate for  Los  Angeles  County excluding  the  Los Angeles
Central/Downtown sector was 17.0% as of December 31, 1995, as compared to  17.3%
in  1994.  Set forth  below is  detailed market  information regarding  the four
sectors within the Los Angeles County office market:
 
                               LOS ANGELES COUNTY
                            OFFICE MARKET STATISTICS
                              AT DECEMBER 31, 1995
 
<TABLE>
<CAPTION>
                                                                                    DIRECT       NET        WTD. AVG.
                                                        NUMBER        DIRECT        VACANCY   ABSORPTION     ASKING
MARKET                                     INVENTORY   OF BLDGS   AVAILABILITIES*    RATE      YTD 1995    RENTAL RATE
- ----------------------------------------  -----------  --------   ---------------   -------   ----------   -----------
<S>                                       <C>          <C>        <C>               <C>       <C>          <C>
LOS ANGELES WEST........................   50,014,880     367        9,289,766       18.6%      419,123      $20.93
LOS ANGELES NORTH.......................   39,355,810     467        5,682,217       14.4%      196,129      $20.80
LOS ANGELES SOUTH/SOUTH BAY.............   27,336,900     240        4,813,583       17.6%      368,654      $18.14
LOS ANGELES CENTRAL/ DOWNTOWN...........   51,544,706     243       11,610,517       22.5%     (711,752)     $18.44
                                          -----------  --------   ---------------   -------   ----------   -----------
    TOTAL...............................  168,252,296   1,317       31,396,083       18.7%      272,154      $19.56
                                          -----------  --------   ---------------   -------   ----------   -----------
                                          -----------  --------   ---------------   -------   ----------   -----------
</TABLE>
 
- ------------------------
Source: C&W Market Study
 
*   Does not include currently leased but available sublease space.
 
                                       74
<PAGE>
LOS ANGELES WEST OFFICE MARKET SECTOR
 
    The Los Angeles West office  market sector contains several distinct  office
submarkets,  including, among others, the Beverly Hills, Century City, Westwood,
West Los Angeles, Marina  Area, Culver City, LAX,  Hollywood and West  Hollywood
office  submarkets. According to  the C&W Market  Study, there are approximately
50,014,880 square feet of office space inventory in the Los Angeles West  office
market sector which comprises approximately 31% of the office space inventory in
Los  Angeles County. As of December 31, 1995, the direct vacancy rate in the Los
Angeles West office market sector was 18.6%. Collectively, the office submarkets
within the Los  Angeles West office  market sector had  weighted average  asking
rents of $20.93 per square foot as of December 31, 1995.
 
                   Map of Los Angeles West office market sector.
 
<TABLE>
<S>                                 <C>
1.  9665 WILSHIRE                   6.  400 CORPORATE POINTE
2.  BEVERLY ATRIUM                  7.  BRISTOL PLAZA
3.  CENTURY PARK CENTER             8.  SKYVIEW CENTER
4.  WESTWOOD TERRACE                9.  THE NEW WILSHIRE
5.  1950 SAWTELLE
</TABLE>
 
    Several  of  the office  submarkets in  the Los  Angeles West  office market
sector, including Westwood, Beverly Hills, and Century City are considered among
the most prestigious and  desirable office locations in  Los Angeles County  and
command  premium rental rates, with average  annual asking rents, as of December
31, 1995, of $28.32, $25.08 and $23.28 per square foot, respectively. The Golden
Triangle area  of Beverly  Hills has  quoted annual  asking rents  ranging  from
$19.80  to $42.00 with a predominant range  of $24.00 to $36.00 per square foot.
The tenant base  of office space  users in  the Los Angeles  West office  market
sector  is  primarily  composed  of  firms  in  the  entertainment, advertising,
professional and  financial  services,  legal, accounting,  insurance  and  real
estate industries.
 
    The  Company owns  nine Properties  located in  the Los  Angeles West office
market sector  that collectively  contain approximately  1,546,108 net  rentable
square  feet which  represents approximately  38% of  the total  rentable square
footage of the Properties. The Properties  are located in the office  submarkets
of   Beverly   Hills,  Century   City,  Westwood,   West  Los   Angeles,  Culver
City/Westchester, LAX and the 6000 Block of Wilshire Boulevard (a segment of the
Miracle Mile office submarket adjacent to Beverly Hills). No new development  of
mid-rise  or  high-rise  properties is  permitted  in the  Beverly  Hills office
submarket as  the City  of Beverly  Hills has  enacted zoning  limitations  that
impose  a three-story height limit for all new commercial development. Set forth
below is detailed submarket information regarding the Los Angeles West sector:
 
                                       75
<PAGE>
                                LOS ANGELES WEST
                          OFFICE SUBMARKET STATISTICS
                              AT DECEMBER 31, 1995
 
<TABLE>
<CAPTION>
                                                                                      DIRECT       NET        WTD. AVG.
                                                       NUMBER         DIRECT         VACANCY    ABSORPTION     ASKING
SUBMARKET                                 INVENTORY   OF BLDGS   AVAILABILITIES(1)     RATE      YTD 1995    RENTAL RATE
- ----------------------------------------  ----------  --------   -----------------   --------   ----------   -----------
<S>                                       <C>         <C>        <C>                 <C>        <C>          <C>
BEVERLY HILLS/CENTURY CITY..............  14,351,740     89          2,340,143       16.3%        317,263      $24.12
    Beverly Hills.......................   5,499,685     63          1,100,405       20.0%        143,812      $25.08
    Century City........................   8,852,055     26          1,239,738       14.0%        173,451      $23.28
WESTWOOD/WEST LOS ANGELES...............  17,304,111    139          2,924,088       16.9%         67,888      $23.88
    Westwood............................   4,084,735     21            579,241       14.2%        172,706      $28.32
    West Los Angeles....................   3,798,977     34            821,453       21.6%(2)    (120,211)     $18.84
    Brentwood...........................   3,254,337     23            399,587       12.3%        148,907      $24.84
    Santa Monica........................   6,005,655     58          1,087,661       18.1%       (141,470)     $25.20
    Pacific Palisades...................     160,407      3             36,146       22.5%          7,956      $20.64
MARINA AREA/CULVER CITY/ LAX............   8,959,927     63          1,912,170       21.3%        223,275      $14.85
    Culver City/Westchester.............   3,643,649     32            537,237       14.7%         52,844      $17.28
    Los Angeles Airport (LAX)...........   4,211,847     20          1,232,354       29.3%(3)      77,496      $13.20
    Marina Del Rey/Venice/MarVista......   1,104,431     11            142,579       12.9%         92,935      $19.92
PARK MILE/WEST HOLLYWOOD................   9,399,102     76          2,113,365       22.5%       (189,303)     $18.80
    Miracle Mile........................   4,444,716     20          1,140,562       25.7%       (242,985)     $19.47
    Park Mile...........................   1,079,452     11            252,993       23.4%         23,958      $16.23
    Hollywood...........................   2,576,475     30            488,686       19.0%         43,438      $15.72
    West Hollywood......................   1,298,459     15            231,124       17.8%        (13,714)     $24.84
    TOTAL...............................  50,014,880    367          9,289,766       18.6%        419,123      $20.93
</TABLE>
 
- ------------------------
Source: C&W Market Study
 
(1) Does not include currently leased but available sublease space.
 
(2) The  marginally  higher  vacancy  in  this  office  submarket  is  partially
    attributable to the loss of a major tenant (Aurora, formerly Executive Life)
    which previously occupied over 300,000 square feet in two properties.
 
(3) The 29.3% direct vacancy rate for the LAX office submarket compared to other
    office  submarkets in the Los Angeles West office market sector reflects the
    fact that  of the  20  buildings in  such  submarket, only  seven  buildings
    comprising  22.2% of such submarket's rentable square feet are classified in
    the C&W  Market  Study as  Class  A office  properties  (all of  which  were
    completed   between  1981  and  1987),  with  the  remaining  13  properties
    classified as  Class B  or  Class C  properties. The  Class  B and  Class  C
    properties do not directly compete with the newer and higher quality Skyview
    Centers  I  and  II and  the  other Class  A  properties in  the  LAX office
    submarket. The direct vacancy level for Class A properties in the LAX office
    submarket was 25.0% as of December 31, 1995.
 
PROPERTIES LOCATED IN THE BEVERLY HILLS OFFICE SUBMARKET:
 
    9665 WILSHIRE.   9665 Wilshire is  a ten-story office  tower located in  the
Golden  Triangle of Beverly Hills completed  in 1972 and substantially renovated
in 1992 and  1993. The Property  contains 158,684 rentable  square feet and  444
parking  spaces. As  of August  1, 1996  the Property  was 95.1%  leased with an
average Annualized Base Rent per leased square foot of $31.45. According to  the
C&W  Market Study, as of April 30,  1996, the 9665 Wilshire Boulevard Peer Group
(the term "Peer Group" as used herein with respect to each of the Properties has
the meaning set forth in the Glossary) contained approximately 1,807,958  square
feet  of office space inventory in 17  buildings and had weighted average annual
asking rental rates ranging from $27.14 to $29.49 per square foot with a  direct
vacancy  rate of 28.7%. Primary tenants at this Property include Sotheby's, Inc.
(17,222 square feet), Merrill Lynch  (15,363 square feet), Smith Barney  (15,321
square  feet), Gruntal & Co. (15,321  square feet), J.B. Oxford Holdings (15,321
square feet) and Sutro & Co.  (11,437 square feet). Aggregate square footage  of
leases  expiring in 1996, 1997,  and 1998 represent 0.8%,  22.3% and 5.5% of the
Property's occupied square footage, respectively.
 
                                       76
<PAGE>
    BEVERLY ATRIUM.   Beverly Atrium is  a 3-story office  complex completed  in
1989  of steel frame construction with a  stone and brick exterior. The Property
contains 61,314 rentable  square feet and  245 parking spaces.  The Property  is
located immediately south of the Golden Triangle area. As of August 1, 1996, the
Property  was 100% leased with an average Annualized Base Rent per leased square
foot of $22.83. According  to the C&W  Market Study, as of  April 30, 1996,  the
Beverly  Atrium  Peer Group  contained  approximately 1,807,958  square  feet of
office space inventory in  17 buildings and had  weighted average annual  asking
rental rates ranging from $27.14 to $29.49 per square foot with a direct vacancy
rate  of 28.7%. Primary  tenants at this Property  include GE Commercial Finance
(18,489  square  feet),  Islands  Restaurant  (7,404  square  feet)  and  Unigem
International  (10,281 square feet). Aggregate square footage of leases expiring
in 1996,  1997,  and 1998  represent  7.8%, 4.3%  and  21.2% of  the  Property's
occupied square footage, respectively.
 
PROPERTY LOCATED IN THE CENTURY CITY OFFICE SUBMARKET:
 
    CENTURY  PARK CENTER.  Century Park  Center contains a 15-story office tower
and an adjacent  three story  office building  completed in  1972. The  Property
contains approximately 243,404 rentable square feet with 674 parking spaces. The
building  was renovated during 1994,  which included redesigning the full-length
glass facade, refilming all of the curtain wall spandrels and installing tenemic
metal to  highlight the  exterior  window frames.  In addition,  the  building's
security  and energy management  systems and facilities  were upgraded, lighting
was retrofitted, and all common areas were renovated. As of August 1, 1996,  the
Property was 83.2% leased with an average Annualized Base Rent per leased square
foot  of $21.38. According  to the C&W Market  Study, as of  April 30, 1996, the
Century Park Center Peer Group contained approximately 3,649,937 square feet  of
office  space inventory in  11 buildings and had  weighted average annual asking
rental rates ranging from $20.64 to $24.96 per square foot with a direct vacancy
rate of 21.8%. The Property is primarily tenanted with numerous professional and
medical related tenants ranging predominantly in size from 1,000 square feet  to
3,000  square feet. The largest tenant at this Property is NME Hospitals (24,069
square feet)  which occupies  approximately  10% of  the rentable  square  feet.
Aggregate  square footage of  leases expiring in 1996,  1997, and 1998 represent
6.6%, 12.2% and 13.9% of the Property's occupied square footage, respectively.
 
PROPERTY LOCATED IN THE WESTWOOD OFFICE SUBMARKET:
 
    WESTWOOD TERRACE.  Westwood Terrace  is a 5-story office building  completed
in  1988 of  steel frame  construction with a  white precast  concrete panel and
blue-green continuous ribbon glass exterior with layered terraces on each story.
The Property contains approximately 135,943 rentable square feet and 450 parking
spaces. As of  August 1, 1996,  the Property  was 82.3% leased  with an  average
Annualized  Base Rent  per leased  square foot of  $25.30. According  to the C&W
Market Study, as of  April 30, 1996, the  Westwood Terrace Peer Group  contained
approximately  1,004,079 square feet of office  space inventory in six buildings
and had  weighted average  annual asking  rental rates  ranging from  $22.50  to
$31.87  per square foot with a direct  vacancy rate of 11.2%. Primary tenants at
this Property include The Hearst Corporation (25,731 square feet) and Blue Cross
of California (15,261 square feet). Aggregate square footage of leases  expiring
in 1996, 1997, and 1998 represent 0.2%, 5.6% and 6.4% of the Property's occupied
square footage, respectively.
 
PROPERTY LOCATED IN THE WEST LOS ANGELES OFFICE SUBMARKET:
 
    1950 SAWTELLE.  1950 Sawtelle is a three-story, office building completed in
1988, of steel frame construction with a brick exterior. The Property, which was
renovated  in 1995, contains approximately 103,772  rentable square feet and has
254 parking spaces. As of August 1, 1996, the Property was 77.5% leased with  an
average  Annualized Base Rent per leased square foot of $20.02. According to the
C&W Market Study, as of April 30,  1996, the 1950 Sawtelle Peer Group  contained
approximately  1,814,375 square feet  of office space  inventory in 10 buildings
and had  weighted average  annual asking  rental rates  ranging from  $17.74  to
$19.09  per square  foot with  a direct  vacancy rate  of 25.8%.  The Property's
tenant base is  largely comprised of  numerous small and  medium sized  service,
medical   and  other  professional   tenants  who  occupy   tenant  suites  that
predominantly range in  size from 1,500  square feet to  3,000 square feet.  The
largest  tenant  at this  Property, Integrated  Decisions (10,635  square feet),
occupies approximately 10%  of the  Property's aggregate  rentable square  feet.
Aggregate  square footage of  leases expiring in 1996,  1997, and 1998 represent
5.2%, 30.4% and 49.8% of the Property's occupied square footage, respectively.
 
                                       77
<PAGE>
PROPERTIES LOCATED IN THE CULVER CITY/WESTCHESTER OFFICE SUBMARKET:
 
    400 CORPORATE  POINTE.    400  Corporate Pointe  is  an  eight-story  office
building  completed in 1987  of steel-framed construction with  a dark glass and
concrete panel exterior.  The Property contains  approximately 164,598  rentable
square  feet with  588 parking spaces.  The Property  is within 1/2  mile of the
I-405 and I-90 Freeways and La Cienega Boulevard, a major north-south artery. As
of August 1, 1996, the Property was 90.2% leased with an average Annualized Base
Rent per leased square foot of $19.91. According to the C&W Market Study, as  of
April  30, 1996,  the 400  Corporate Pointe  Peer Group  contained approximately
1,792,632 square feet of office space inventory in 14 buildings and had weighted
average annual asking rental rates ranging from $17.22 to $17.81 per square foot
with a direct vacancy  rate of 26.9%. Primary  tenants at this Property  include
Pepperdine  University (89,752  square feet)  which is  subject to  a triple net
lease expiring in the year 2002,  and Crawford & Co. (20,347). Aggregate  square
footage  of leases  expiring in  1996, 1997, and  1998 represent  1.3%, 6.0% and
15.9% of the Property's occupied square footage, respectively.
 
    BRISTOL PLAZA.  Bristol Plaza is  a four-story office building completed  in
1982  of steel-frame construction  with a brushed  aluminum and reflective glass
exterior. The  Property contains  84,014 rentable  square feet  and 320  parking
spaces.  The Property is within  1/2 mile of the I-405  and I-90 Freeways and La
Cienega Boulevard,  a  major north-south  artery.  As  of August  1,  1996,  the
Property was 78.6% leased with an average Annualized Base Rent per leased square
foot  of $18.10. According  to the C&W Market  Study, as of  April 30, 1996, the
Bristol Plaza Peer Group contained approximately 1,873,463 square feet of office
space inventory in 14  buildings and had weighted  average annual asking  rental
rates  ranging from $17.24 to $17.83 per  square foot with a direct vacancy rate
of 25.6%. Primary tenants  at this Property include  Bristol A/R (12,163  square
feet)  and  the  State  of  California (10,527  square  feet).  No  other tenant
comprises more than  8% of  the Property's aggregate  square footage.  Aggregate
square  footage of leases expiring in 1996,  1997, and 1998 represent 2.4%, 5.9%
and 36.2% of the Property's occupied square footage, respectively.
 
PROPERTY LOCATED IN THE LAX OFFICE SUBMARKET:
 
    SKYVIEW CENTER.   Skyview  Center  consists of  two 11-and  12-story  office
towers  completed in  1981 and 1987,  respectively, of  steel frame construction
with a reflective glass and painted metal mullions exterior. The buildings  were
renovated  in 1995. The Property  contains approximately 391,675 rentable square
feet with 393 parking spaces.  Adjacent to the Property  is a 14.4 acre  surface
parking  lot containing approximately 2,000 parking  spaces that are utilized as
short and long term airport  parking. Each building comprises approximately  50%
of  the total rentable area. As of August 1, 1996, the Property was 86.0% leased
with an average Annualized Base Rent per leased square foot of $17.01. According
to the C&W Market  Study, as of  April 30, 1996, the  Skyview Center Peer  Group
contained  approximately 2,449,177 square  feet of office  space inventory in 10
buildings located along the  Century Boulevard and in  El Segundo with  weighted
average annual asking rental rates ranging from $17.70 to $20.75 per square foot
with  a direct vacancy rate  of 13.8%. Primary tenants  at this Property include
Logicon, Inc. (74,174 square feet),  Learning Tree International (34,145  square
feet)  and American Tours  International (32,586 square  feet). Aggregate square
footage of leases expiring in 1996, 1997, and 1998 represent 1.4%, 7.8% and 6.7%
of the Property's occupied square footage, respectively.
 
                                       78
<PAGE>
PROPERTY LOCATED IN THE 6000 BLOCK OF WILSHIRE BOULEVARD OFFICE MICROMARKET(1):
 
    THE  NEW WILSHIRE.  The New Wilshire is a 16-story office tower completed in
    1986 of steel frame construction with  a tempered vision and spandrel  glass
    curtain  wall exterior. The Property contains approximately 202,704 rentable
    square feet and 398 parking  spaces. As of August  1, 1996 the Property  was
    83.9%  leased with an average Annualized Base Rent per leased square foot of
    $20.35. According to the  C&W Market Study,  as of April  30, 1996, The  New
    Wilshire  Peer Group contained approximately 3,098,886 square feet of office
    space inventory in seven  buildings and had  weighted average annual  asking
    rental  rates ranging from  $20.04 to $23.90  per square foot  with a direct
    vacancy rate  of  19.9%.  Primary  tenants at  this  Property  include  Grey
    Advertising  (50,152  square feet),  Muse Cordero  (15,551 square  feet) and
    Hallmark Entertainment  (12,453 square  feet). Aggregate  square footage  of
    leases  expiring in 1996, 1997, and 1998 represent 14.2%, 14.8% and 16.7% of
    the Property's occupied square footage, respectively.
- ------------------------
    (1) The Company  defines the  geographical location where  this Property  is
       located  as a  separate office  micromarket. While  the C&W  Market Study
       defines this location as a segment of the Miracle Mile office  submarket,
       the  Company believes that  this location functions  as a separate office
       micromarket which  is  independent of  the  overall Miracle  Mile  office
       submarket.  The Company further believes that  the 6000 Block of Wilshire
       Boulevard office  micromarket  is  primarily  influenced  by,  and  is  a
       peripheral or satellite micromarket of, the adjacent Beverly Hills office
       submarket.
 
LOS ANGELES NORTH OFFICE MARKET SECTOR
 
    The  Los Angeles North  office market sector,  as defined by  the C&W Market
Study, encompasses  four market  areas  located primarily  in the  San  Fernando
Valley, Santa Clarita Valley, and Conejo Valley areas of Los Angeles County, and
portions  of southeastern  Ventura County. The  four primary markets  in the Los
Angeles North  office  market  sector  include:  Simi/Conejo  Valley,  West  San
Fernando  Valley, Central San Fernando Valley,  and East San Fernando Valley/Tri
Cities, with each  of these office  markets in turn  composed of several  office
submarkets.
 
                 Map of Los Angeles North office market sector.
 
<TABLE>
<S>                                 <C>
10.  5601 LINDERO CANYON            14.  425 WEST BROADWAY
11.  CALABASAS COMMERCE CENTER      15.  303 GLENOAKS
12.  WOODLAND HILLS FINANCIAL
 CENTER                             16.  70 SOUTH LAKE
13.  16000 VENTURA BLVD.
</TABLE>
 
    The  distinct  office submarkets  within the  Los  Angeles North  sector are
indicated in  the table  below. According  to the  C&W Market  Study, there  are
approximately  39,400,000  square  feet of  office  space inventory  in  the Los
Angeles North  office market  sector  which comprise  approximately 23%  of  the
office  space  inventory in  Los Angeles  County.  As of  December 31,  1995 the
collective submarkets within the  Los Angeles North office  market sector had  a
direct  vacancy  rate of  14.4%, with  weighted average  annual asking  rents of
$20.80 per square foot.
 
    The Company owns seven  Properties located in the  Los Angeles North  office
market  sector that  collectively contain approximately  975,918 rentable square
feet which represents approximately 24% of the total rentable square footage  of
the  Properties. The Properties are located in the office submarkets of Westlake
Village, Calabasas, Woodland  Hills, Encino, Glendale,  Burbank City Center  and
Pasadena.  Set forth below  is detailed submarket  information regarding the Los
Angeles North sector.
 
                                       79
<PAGE>
                               LOS ANGELES NORTH
                          OFFICE SUBMARKET STATISTICS
                              AT DECEMBER 31, 1995
 
<TABLE>
<CAPTION>
                                                                           DIRECT        NET              WTD. AVG.
                                             NUMBER          DIRECT        VACANCY    ABSORPTION           ASKING
SUBMARKET                       INVENTORY   OF BLDGS   AVAILABILITIES(1)    RATE       YTD 1995          RENTAL RATE
- ------------------------------  ----------  --------   ------------------  -------   ------------        -----------
<S>                             <C>         <C>        <C>                 <C>       <C>                 <C>
SIMI/CONEJO VALLEY............   4,537,562     87                510,332    11.2%         243,948          $18.36
  Simi Valley.................     196,326      6                 28,401    14.5%          32,363          $14.64
  Thousand Oaks/Newbury
   Park.......................     701,607     14                239,761    34.2%            (597)         $19.80
  Westlake Village............   1,735,399     32                149,247     8.6%         176,534          $17.16
  Agoura Hills................     497,672     10                 40,588     8.2%          (7,747)         $15.48
  Calabasas...................   1,406,558     25                 52,335     3.7%          43,395          $19.32
WEST SAN FERNANDO VALLEY......   8,487,933     96              1,404,681    16.5%         209,106          $21.60
  Northridge/Reseda...........     266,000      5                 14,408     5.4%         110,394          $16.92
  Tarzana.....................     508,929     10                 95,615    18.8%          11,998          $19.08
  Canoga Park/Chatsworth......   1,316,333     24                279,918    21.3%        (109,904)         $16.32
  Warner Center...............   5,325,021     39                887,559    16.7%         164,899          $23.88
  Woodland Hills..............   1,071,650     18                127,181    11.9%          31,719          $18.84
CENTRAL SAN FERNANDO VALLEY...   8,525,170    111              1,528,178    17.9%        (181,315)         $19.68
  Encino......................   3,910,209     39                627,549    16.0%         (90,048)         $21.36
  Sherman Oaks................   2,264,136     27                429,972    19.0%          (7,327)         $20.40
  Van Nuys....................   1,442,363     27                293,101    20.3%         (38,627)         $17.16
  Park City/Granada/Mission
   Hills......................     386,090      7                 64,839    16.8%         (27,904)         $15.84
  Valencia/Newhall............     522,372     11                112,717    21.6%         (17,409)         $17.04
EAST SAN FERNANDO VALLEY/TRI-
 CITIES.......................  17,805,145    173              2,239,026    12.6%         (75,610)         $21.61
  Burbank-Media District......   2,043,350     15                 31,937     1.6%          87,406          $28.43
  Burbank-City Center.........   1,710,879     23                242,563    14.2%         (26,003)         $18.83
  Glendale....................   5,052,071     44                799,750    15.8%        (151,308)(2)      $23.16
  Pasadena....................   5,542,296     57                732,964    13.2%        (105,482)         $21.47
  Pasadena East...............     574,421      6                206,210    35.9%          (4,418)         $18.69
  Studio City/Universal
   City.......................   1,763,500     15                 79,999     4.5%          56,744          $25.20
  North Hollywood.............   1,118,628     13                145,603    13.0%          67,451          $19.08
                                ----------    ---             ----------   -------   ------------        -----------
    TOTAL.....................  39,355,810    467              5,682,217    14.4%         196,129          $20.80
                                ----------    ---             ----------   -------   ------------        -----------
                                ----------    ---             ----------   -------   ------------        -----------
</TABLE>
 
- ------------------------
Source: C&W Market Study
 
(1) Does not include currently leased but available sublease space.
 
(2) The  negative  absorption  in  the Glendale  office  submarket  during  1995
    primarily  reflects the activity of one  building, where the Bank of America
    vacated approximately  200,000  square  feet,  and is  in  contrast  to  the
    positive  absorption experienced in 1993 and  1994. During the first quarter
    of 1996 two major entertainment  tenants, Walt Disney and Turner  Animation,
    entered  into leases in the Glendale office submarket of 150,000 square feet
    and 70,000  square feet,  respectively, both  of which  are located  in  the
    premises vacated in 1995 by Bank of America.
 
PROPERTY LOCATED IN THE WESTLAKE VILLAGE OFFICE SUBMARKET:
 
    5601  LINDERO CANYON.   5601 Lindero  Canyon is a  two-story office building
    completed in 1989 of tilt up concrete construction with a white concrete and
    black glass  facade. The  Property contains  approximately 105,830  rentable
    square  feet and 415 parking spaces. As  of August 1, 1996, the building was
    100% triple  net leased  with an  average Annualized  Base Rate  per  leased
    square  foot of $11.15. According  to the C&W Market  Study, as of April 30,
    1996, the 5601 Lindero Canyon Peer Group
 
                                       80
<PAGE>
    contained approximately 630,451 square feet  of office space inventory in  9
    buildings and had a weighted average annual asking rental rate of $19.03 per
    square  foot  with a  direct  vacancy rate  of  4.7%. The  Property  has two
    tenants, Hewlett-Packard (53,700 square feet) and Candle Corporation (52,130
    square feet), both of which operate  under triple net leases that expire  in
    2002.
 
PROPERTY LOCATED IN THE CALABASAS OFFICE SUBMARKET:
 
    CALABASAS  COMMERCE CENTER.  Calabasas Commerce Center is comprised of four,
    one- and two-story office buildings completed in 1990. The Property contains
    approximately 123,121 rentable square feet  and 464 surface parking  spaces.
    As  of  August  1,  1996,  the Property  was  100%  leased  with  an average
    Annualized Base Rent per leased square foot of $17.14. According to the  C&W
    Market Study, as of April 30, 1996, the Calabasas Commerce Center Peer Group
    contained  approximately 371,634  square feet  of office  space inventory in
    five buildings  and had  a weighted  average annual  asking rental  rate  of
    $19.16  per square foot with a direct  vacancy rate of 5.4%. Primary tenants
    at this Property  include the City  of Calabasas (9,243  square feet),  Wyle
    Laboratories  (10,841 square feet), Novalogic Inc.(13,932 square feet), Fort
    Dearborn Life Insurance (9,128 square feet) and Breath Assure (8,613  square
    feet).  One  tenant,  XIRCOM,  Inc.  leases  an  entire  building comprising
    approximately 46,321 square feet. XIRCOM, Inc. vacated the property in  1994
    in  order to relocate to another  office building that could accommodate its
    expansion requirements. To date, XIRCOM, Inc.  has continued to meet all  of
    its  rental payment obligations under its  lease, which expires in 1997, and
    is currently attempting to sublease  its space. Aggregate square footage  of
    leases expiring in 1996, 1997 and 1998 represent 7.4%, 48.3% and 3.6% of the
    Property's occupied square footage, respectively.
 
PROPERTY LOCATED IN THE WOODLAND HILLS OFFICE SUBMARKET:
 
    WOODLAND  HILLS  FINANCIAL CENTER.   Woodland  Hills  Financial Center  is a
    12-story office tower with an adjacent four-story office building  completed
    in  1972 and renovated in 1995.  The Property contains approximately 224,955
    rentable square  feet and  510 parking  spaces. As  of August  1, 1996,  the
    building  was 89.8% leased  with an average Annualized  Base Rent per leased
    square foot of $22.29. According  to the C&W Market  Study, as of April  30,
    1996, the Woodland Hills Financial Center Peer Group contained approximately
    854,004  square  feet of  office space  inventory in  six buildings  and had
    weighted average annual asking  rental rates ranging  from $22.50 to  $22.97
    per square foot with a direct vacancy rate of 10.0%. Primary tenants at this
    Property  include  Presidential  Mortgage  (19,600  square  feet), Dennison,
    Bennet & Press (14,386 square feet), Pacific Homes (13,989 square feet)  and
    Wells  Fargo Bank  (8,983 square feet).  Aggregate square  footage of leases
    expiring in  1996, 1997  and 1998  represent 6.9%,  7.3%, and  19.8% of  the
    Property's occupied square footage, respectively.
 
PROPERTY LOCATED IN THE ENCINO OFFICE SUBMARKET:
 
    16000 VENTURA BOULEVARD.  16000 Ventura Boulevard is a 12-story office tower
    completed  in 1980 of steel reinforced  concrete with a blue glass exterior.
    The building  was renovated  in 1996.  The Property  contains  approximately
    174,841  rentable square feet and 630 parking  spaces. As of August 1, 1996,
    the building  was 84.1%  leased with  an average  Annualized Base  Rent  per
    leased square foot of $20.21. According to the C&W Market Study, as of April
    30,  1996, the  16000 Ventura  Boulevard Peer  Group contained approximately
    2,418,206 square feet  of office  space inventory  in 12  buildings and  had
    weighted  average annual asking  rental rates ranging  from $20.21 to $22.45
    per square foot with a direct vacancy rate of 15.0%. Primary tenants at this
    Property  include   Barrister  Executive   Suites  (16,142   square   feet),
    Information  Technology (8,638 square feet),  Greenberg & Bass (8,814 square
    feet) and Cohen & Steinbrech  (8,199 square feet). Aggregate square  footage
    of leases expiring in 1996, 1997 and 1998 represent 8.4%, 30.9% and 20.1% of
    the Property's occupied square footage, respectively.
 
PROPERTY LOCATED IN THE GLENDALE OFFICE SUBMARKET:
 
    425  WEST  BROADWAY.   425 West  Broadway  is a  four story  office building
    completed in 1984  of steel reinforced  concrete with a  concrete panel  and
    reflective  glass exterior. The building was renovated in 1996. The Property
    contains approximately 71,589 rentable square feet with 205 parking  spaces.
    As  of  August  1, 1996,  the  Property  was 95.9%  leased  with  an average
    Annualized Base Rent per leased square foot of $19.35. According to the  C&W
    Market   Study,  as  of   April  30,  1996,  the   425  West  Broadway  Peer
 
                                       81
<PAGE>
    Group contained approximately 409,078 square feet of office space  inventory
    in  four  buildings  and had  weighted  average annual  asking  rental rates
    ranging from $19.78 to $20.43 per square foot with a direct vacancy rate  of
    11.0%. Primary tenants at this Property include Glendale News (18,189 square
    feet)  and TIB Insurance (14,075 square feet).  No leases expire in 1996 and
    the aggregate square footage of leases  expiring in 1997 and 1998  represent
    8.4% and 32.4% of the Property's occupied square footage, respectively.
 
PROPERTY LOCATED IN THE BURBANK CITY CENTER OFFICE SUBMARKET:
 
    303  GLENOAKS.  303 Glenoaks is a 10-story office tower completed in 1983 of
    steel frame  construction with  a  black glass  curtain wall  exterior.  The
    Property,  which  was  renovated  in  1996,  contains  approximately 175,449
    rentable square feet  with 526  parking spaces. As  of August  1, 1996,  the
    Property  was 97.4% leased  with an average Annualized  Base Rent per leased
    square foot of $20.35. According  to the C&W Market  Study, as of April  30,
    1996,  the 303  Glenoaks Peer  Group contained  approximately 452,850 square
    feet of  office space  inventory in  6 buildings  and had  weighted  average
    annual  asking rental  rates ranging from  $21.28 to $21.85  per square foot
    with a  direct vacancy  rate  of 17.5%.  Primary  tenants at  this  Property
    include  DiC Entertainment  (51,708 square  feet), Insurance  Company of the
    West (23,450 square feet), New Wave Entertainment (18,639 square feet),  NCI
    (11,142  square feet) and Lockheed Finance Corporation (10,319 square feet).
    Aggregate square footage of leases expiring in 1996, 1997 and 1998 represent
    0.4%, 1.6% and 5.0% of the Property's occupied square footage, respectively.
 
PROPERTY LOCATED IN THE PASADENA OFFICE SUBMARKET:
 
    70 SOUTH LAKE.  70 South Lake is an 11-story office tower completed in  1982
    of  steel frame construction  with concrete panelled  curtain wall, aluminum
    spandrel and  glass  exterior.  The  building was  renovated  in  1994.  The
    Property contains approximately 100,133 rentable square feet and 329 parking
    spaces.  As of August 1, 1996, the Property was 81.4% leased with an average
    Annualized Base Rent per leased square foot of $20.80. According to the  C&W
    Market  Study, as of April 30, 1996,  the 70 South Lake Peer Group contained
    approximately 1,651,840  square  feet of  office  space inventory  in  eight
    buildings  and had weighted average annual  asking rental rates ranging from
    $23.04 to $25.71 per square foot with a direct vacancy rate of 9.2%. Primary
    tenants at  this Property  include Countrywide  Funding Corporation  (16,726
    square feet), Union Bank (14,326 square feet) and Smith Barney (9,415 square
    feet). No leases expire in 1996 or 1997 and 10.3% of the Property's occupied
    square footage expires in 1998.
 
                                       82
<PAGE>
LOS ANGELES SOUTH OFFICE MARKET SECTOR
 
    The  Los Angeles South  office market sector,  as defined by  the C&W Market
Study, encompasses three market areas located primarily in the South Bay area of
Los Angeles  County and  is the  smallest office  market sector  in Los  Angeles
County.  The Los Angeles South office market sector is composed of three primary
office markets: El  Segundo, Torrance and  Long Beach, with  each of the  office
markets in turn composed of a number of submarkets.
 
                                     [LOGO]
 
<TABLE>
<S>                             <C>
17.  4811 AIRPORT PLAZA DRIVE   20.  100 WEST BROADWAY
18.  4900/10 AIRPORT PLAZA      21.  12501 EAST IMPERIAL
 DRIVE                           HIGHWAY
19.  5000 EAST SPRING
</TABLE>
 
    The  Los Angeles  South office market  sector contains  nine distinct office
submarkets as outlined in  the table below. According  to the C&W Market  Study,
there  are approximately 27,336,900 square feet of office space inventory in the
Los Angeles South office market sector  which comprise approximately 16% of  the
office  space  inventory in  Los Angeles  County.  As of  December 31,  1995 the
collective office submarkets within the  Los Angeles South office market  sector
had a direct vacancy rate of 17.6%, with weighted average annual asking rents of
$18.14 per square foot.
 
    The  Company owns  five Properties located  in the Los  Angeles South office
market sector that  collectively contain approximately  749,273 rentable  square
feet, which represents approximately 19% of the total rentable square footage of
the Properties. The Properties within the Los Angeles South office market sector
are all located in the Long Beach office market. The Long Beach office market is
located south of El Segundo and Torrance and north of Huntington Beach. The Long
Beach  office market is composed of  five office submarkets: Long Beach Airport/
I-405 Freeway  Corridor,  North Long  Beach,  Downtown Long  Beach,  Long  Beach
Marina,  and  Cerritos/Norwalk.  The  Long  Beach  market  is  one  of  the more
prestigious office  markets  in the  Los  Angeles South  office  market  sector.
According to the C&W Market Study, as of December 31, 1995 the Long Beach office
market  had an office space inventory of approximately 10,500,161 square feet in
89 buildings with  a direct vacancy  rate of 17.6%  and weighted average  annual
asking  rents of $18.64, down from a  direct vacancy rate of 17.3% with weighted
average annual asking rents of $19.20 per  square foot as of December 31,  1994.
Set  forth below  is detailed  submarket information  regarding the  Los Angeles
South sector:
 
                                       83
<PAGE>
                               LOS ANGELES SOUTH
                          OFFICE SUBMARKET STATISTICS
                              AT DECEMBER 31, 1995
 
<TABLE>
<CAPTION>
                                                                           DIRECT          NET        WTD. AVG.
                                             NUMBER          DIRECT        VACANCY      ABSORPTION     ASKING
SUBMARKET                       INVENTORY   OF BLDGS   AVAILABILITIES(1)    RATE         YTD 1995    RENTAL RATE
- ------------------------------  ----------  --------   ------------------  -------     ------------  -----------
<S>                             <C>         <C>        <C>                 <C>         <C>           <C>
EL SEGUNDO....................   9,424,153     69              1,471,128    15.6%           326,730    $17.88
TORRANCE......................   7,412,586     82              1,490,376    20.1%          (307,739)   $17.76
LONG BEACH....................  10,500,161     89              1,852,079    17.6%           349,663    $18.64
  Long Beach Airport/I-405
   Fwy. Corridor..............   2,130,258     19                319,077    15.0%           419,823    $18.48
  North Long Beach............   1,020,376     13                222,907    21.8%               (46)   $15.00
  Downtown Long Beach.........   3,811,553     20                999,351    26.2%          (129,899)   $19.92
  Long Beach Marina...........     457,018      6                 55,247    12.1%            19,419    $18.96
  Cerritos/Norwalk............   3,080,956     31                255,497     8.3%            40,366    $16.95
                                ----------    ---             ----------   -------     ------------  -----------
    TOTAL.....................  27,336,900    240              4,813,583    17.6%           368,654    $18.14
                                ----------    ---             ----------   -------     ------------  -----------
                                ----------    ---             ----------   -------     ------------  -----------
</TABLE>
 
- ------------------------
Source: C&W Market Study
(1) Does not include currently leased but available sublease space.
 
PROPERTIES LOCATED IN THE LONG BEACH AIRPORT/I-405 FREEWAY CORRIDOR OFFICE
SUBMARKET:
 
    4811 AIRPORT PLAZA DRIVE.   4811 Airport Plaza  Drive is a six-story  office
    building  completed in 1987 of steel  frame construction and red granite and
    reflective glass exterior. The building was renovated in 1995. The  Property
    contains  approximately 121,610 rentable square feet with 707 parking spaces
    and is subject to a ground lease  with the City of Long Beach which  expires
    in  2055. As of August  1, 1996, the building was  100% triple net leased to
    McDonnell Douglas  at an  Annualized Base  Rent per  leased square  foot  of
    $8.64.  According to the  C&W Market Study,  as of April  30, 1996, the 4811
    Airport Plaza Drive Peer Group contained approximately 1,230,855 square feet
    of office space  inventory in 9  buildings and had  weighted average  annual
    asking  rental rates ranging  from $22.81 to  $26.26 per square  foot with a
    direct vacancy rate of 4.9%. The McDonnell Douglas lease expires in 2005.
 
    4900 AND 4910 AIRPORT PLAZA  DRIVE.  4900 and  4910 Airport Plaza Drive  are
    two three-story, connected office buildings completed in 1987 of steel frame
    construction with granite and reflective glass exteriors. The buildings were
    renovated  in  1995. The  Property  contains approximately  150,403 rentable
    square feet. The Property has the use  of 520 parking spaces and is  subject
    to  a ground lease with the City of  Long Beach which expires in 2055. As of
    August 1, 1996, the Property was 100% triple net leased to McDonnell Douglas
    at an Annualized Base Rent per leased square foot of $7.80. According to the
    C&W Market Study,  as of April  30, 1996,  the 4900 and  4910 Airport  Plaza
    Drive  Peer Group  contained approximately  1,202,062 square  feet of office
    space inventory in  nine buildings  and had weighted  average annual  asking
    rental  rates ranging from  $22.81 to $26.26  per square foot  with a direct
    vacancy rate of 5.1%. The McDonnell Douglas lease expires in 2005.
 
    5000 EAST  SPRING.   5000  East Spring  is  an eight-story  office  building
    completed  in 1989 of steel framed construction with a travertine marble and
    reflective glass exterior. The building was renovated in 1995. The  Property
    contains  163,358 net  rentable square  feet and  2,504 parking  spaces. The
    Property is subject to a long term ground lease with the City of Long  Beach
    (master  lessor) which expires in  2032. As of August  1, 1996, the building
    was 89.6% leased with an average Annualized Base Rent per leased square foot
    of $18.76. According to the C&W Market Study, as of April 30, 1996, the 5000
    East Spring  Peer Group  contained approximately  1,189,107 square  feet  of
    office  space inventory  in nine buildings  and had  weighted average annual
    asking rental rates  ranging from $22.74  to $26.60 per  square foot with  a
    direct  vacancy rate of  4.6%. Primary tenants at  this Property include PSI
    Engineers, Inc. (13,896  square feet),  Medical Eye  Service (13,588  square
    feet),  Coast Federal Bank (11,646  square feet), Auto Insurance Specialists
    (10,583  square  feet),  Sea-Land  Service  (9,112  square  feet),   Payless
    Shoesource
 
                                       84
<PAGE>
    (9,680  square  feet)  and  IDS  Financial  Services  (7,486  square  feet).
    Aggregate square footage of leases expiring in 1996, 1997 and 1998 represent
    9.1%, 3.3% and 2.0% of the Property's occupied square footage, respectively.
 
PROPERTY LOCATED IN THE DOWNTOWN LONG BEACH OFFICE SUBMARKET:
 
    100 WEST  BROADWAY.   100  West  Broadway  is a  six-story  office  building
    completed in 1987 of steel frame construction with a concrete and reflective
    glass  exterior. The building  was renovated in  1996. The Property contains
    approximately 191,727 rentable  square feet  and 645 parking  spaces. As  of
    August 1, 1996 the Property was 90.0% leased with an average Annualized Base
    Rent per leased square foot of $20.42. According to the C&W Market Study, as
    of  April 30, 1996, the 100 West Broadway Peer Group contained approximately
    1,561,223 square feet of  office space inventory in  10 buildings and had  a
    weighted  average annual asking  rental rates ranging  from $18.77 to $20.32
    per square foot with a direct vacancy rate of 34.4%. Primary tenants at this
    Property include Earth Technology Corporation (44,122 square feet), Inchcape
    (28,925 square  feet), the  General Services  Administration (16,738  square
    feet) and Pacific Maritime (15,338 square feet). Aggregate square footage of
    leases  expiring in 1996, 1997 and 1998 represent 1.0%, 4.7% and 9.9% of the
    Property's occupied square footage, respectively.
 
PROPERTY LOCATED IN THE CERRITOS/NORWALK OFFICE SUBMARKET:
 
    12501 EAST IMPERIAL  HIGHWAY.  12501  East Imperial Highway  is a  six-story
    office  building completed in 1978. The  building was renovated in 1994. The
    Property contains approximately 122,175 rentable square feet and 515 parking
    spaces. As of August 1, 1996, the Property was 94.7% leased with an  average
    Annualized  Base Rent per leased square foot of $16.27. According to the C&W
    Market Study, as  of April 30,  1996, the 12501  East Imperial Highway  Peer
    Group   contained  approximately  1,889,992  square  feet  of  office  space
    inventory in 16 buildings  and had a weighted  average annual asking  rental
    rates  ranging from $18.32 to  $18.47 per square foot  with a direct vacancy
    rate of  18.5%. Primary  tenants  at this  Property include  GTE  California
    (63,772  square feet), Mead Corporation (27,913 square feet) and IBM (20,620
    square feet). No leases expire in 1996 and 1997 and 24.1% of the  Property's
    occupied square footage expires in 1998.
 
                                       85
<PAGE>
ORANGE COUNTY OFFICE MARKET AND PROPERTIES
 
    The  Orange County office  market contains several  distinct office markets,
including, among  others, the  West County,  Tri-Freeway Area,  Central  County,
Greater  Airport Area, South County, and  North County office markets, which are
in turn, composed  of numerous submarkets.  According to the  C&W Market  Study,
there  are approximately 52,668,350 square feet of office space inventory in the
Orange County office market. As of  December 31, 1995 the collective  submarkets
within  the Orange County office market had a direct vacancy rate of 15.5%, with
weighted average annual asking rents of $17.28 per square foot.
 
                                     [LOGO]
 
                  22.  5832 BOLSA AVENUE, HUNTINGTON BEACH
                  23.  ANAHEIM CITY CENTRE
 
    The Orange County office market is currently in the midst of a recovery from
the recent real estate recession. Direct vacancy levels, which were in excess of
19.5% in 1991, have declined to 15.5% as of December 31, 1995. The Orange County
office market  is  driven  by  the Greater  Airport  Area  office  market  which
comprises  approximately 48% of the office space inventory in Orange County. The
Company owns two Properties in Orange County in the Huntington Beach and Anaheim
Stadium Area office submarkets that collectively contain 224,746 rentable square
feet representing approximately 6% of the  total rentable square footage of  the
Properties.  Set forth below is detailed market information regarding the Orange
County office market.
 
                                       86
<PAGE>
                                 ORANGE COUNTY
                     OFFICE MARKET AND SUBMARKET STATISTICS
                              AT DECEMBER 31, 1995
 
<TABLE>
<CAPTION>
                                                                           DIRECT          NET        WTD. AVG.
                                             NUMBER          DIRECT        VACANCY      ABSORPTION     ASKING
SUBMARKET                       INVENTORY   OF BLDGS   AVAILABILITIES(1)    RATE         YTD 1995    RENTAL RATE
- ------------------------------  ----------  --------   ------------------  -------     ------------  -----------
<S>                             <C>         <C>        <C>                 <C>         <C>           <C>
WEST COUNTY...................   3,901,199     64                696,122    17.8%           (93,203)   $15.12
  Seal Beach..................     295,019      4                 17,646     6.0%             4,077    $24.96
  Westminster.................     205,700      4                 29,638    14.4%           (11,482)   $15.00
  Huntington Beach............   1,014,519     18                219,035    21.6%            21,131    $15.48
  Fountain Valley.............     549,912      9                 80,134    14.6%           (11,189)   $15.84
  Garden Grove................     893,809     12                213,168    23.8%           (54,632)   $14.28
  Los Alamitos/Stanton........     266,502      5                 85,580    32.1%           (20,233)   $12.36
  Cypress.....................     675,738     12                 50,921     7.5%           (20,875)   $17.04
TRI-FREEWAY AREA..............   9,523,392    107              2,023,109    21.2%            85,793    $16.56
  Parkcenter Area.............   2,598,284     41                444,188    17.1%            72,936    $14.40
  Anaheim Stadium Area........   2,472,409     36                414,147    16.8%           (45,422)   $15.48
  The City Area...............   2,291,191     15                627,817    27.4%             9,677    $17.16
  Main Place Area.............   2,161,508     15                536,957    24.8%            48,602    $18.36
CENTRAL COUNTY................   5,656,141    102              1,049,902    18.6%             8,065    $14.04
GREATER AIRPORT AREA..........  24,992,997    252              3,333,179    13.3%           235,485    $19.32
SOUTH COUNTY..................   4,979,988    100                595,528    12.0%            71,259    $18.12
NORTH COUNTY..................   3,614,633     54                442,671    12.2%            27,940    $16.20
                                ----------    ---             ----------   -------     ------------  -----------
    TOTAL.....................  52,668,350    679              8,140,511    15.5%           335,339    $17.28
                                ----------    ---             ----------   -------     ------------  -----------
                                ----------    ---             ----------   -------     ------------  -----------
</TABLE>
 
- ------------------------
Source: C&W Market Study
* Does not include currently leased but available sublease space.
 
PROPERTY LOCATED IN THE HUNTINGTON BEACH OFFICE SUBMARKET:
 
    5832 BOLSA  AVENUE.   5832  Bolsa  Avenue  is a  two-story  office  building
    completed  in 1985  of steel  frame construction  with a  concrete and glass
    panel exterior. The Property  contains approximately 49,355 rentable  square
    feet  and 380 parking  spaces. As of  August 1, 1996,  the building was 100%
    leased to GTE California at an  Annualized Base Rent per leased square  foot
    of $13.35. According to the C&W Market Study, as of April 30, 1996, the 5832
    Bolsa  Avenue  Peer Group  contained  approximately 860,277  square  feet of
    office space  inventory in  12  buildings and  had weighted  average  annual
    asking  rental rates ranging  from $15.68 to  $16.43 per square  foot with a
    direct vacancy rate of 21.8%. The GTE California lease expires on April  30,
    2000.
 
PROPERTY LOCATED IN THE ANAHEIM STADIUM AREA OFFICE SUBMARKET:
 
    ANAHEIM  CITY  CENTRE.   Anaheim  City  Centre  is a  10-story  office tower
    completed in  1986 of  steel  reinforced concrete  construction with  a  red
    travertine  marble  and black  reflective glass  exterior. The  building was
    renovated in  1991. The  Property  contains approximately  175,391  rentable
    square  feet and 679 parking  spaces. The parking structure  is subject to a
    long term ground lease with the City of Anaheim that expires in 2034. As  of
    August  1, 1996,  the Property was  93.0% leased with  an average Annualized
    Base Rent per  leased square  foot of $15.07.  According to  the C&W  Market
    Study,  as of April 30,  1996, the Anaheim City  Centre Peer Group contained
    approximately  3,165,279  square  feet  of  office  space  inventory  in  10
    buildings  and had weighted average annual  asking rental rates ranging from
    $19.26 to  $19.32 per  square foot  with  a direct  vacancy rate  of  12.1%.
    Primary  tenants at  this Property  include Intracorp  (54,179 square feet),
    Computer Learning (22,042 square feet)  and McGladrey Pullen (18,032  square
    feet).  No leases expire in 1996 and  the aggregate square footage of leases
    expiring in  1997  and 1998  represent  2.9%  and 34.6%  of  the  Property's
    occupied square footage, respectively.
 
                                       87
<PAGE>
SAN DIEGO COUNTY OFFICE MARKET AND PROPERTY
 
    The   San  Diego  County  office   market  contains  eight  distinct  office
submarkets, including  South  Bay, Central  City  (which includes  Downtown  San
Diego),  East County, Mission  Valley/Kearny Mesa, La  Jolla/ Morena, North City
(which includes the University  Towne Center), the I-15  Corridor and the  North
Coast.  According to  the C&W  Market Study,  there is  approximately 58,325,238
square feet of office space inventory in the San Diego County office market.  As
of  December  31, 1995  the collective  submarkets within  the San  Diego County
office market had a direct  vacancy rate of 14.6%.  The San Diego County  office
market  is recovering from  an office market  recession, having experienced five
straight years of positive absorption and increasing occupancy, with the  direct
vacancy  rate decreasing 4.8% over this period from the 1991 direct vacancy rate
of 19.4%.
 
                                     [LOGO]
 
                  24.  IMPERIAL BANK TOWER
 
    The two focal points of the San Diego County office market are Downtown  San
Diego,  which is  considered to  be the  primary component  of the  Central City
office submarket,  and University  Towne Center  which is  the most  significant
component  of the North City office submarket.  Each of the office submarkets in
San Diego County has developed along the path of the San Diego County's  freeway
system.  Each office submarket's  building type and  tenant appeal has generally
corresponded to its proximity to Downtown San Diego and University Towne Center,
with predominantly  mid-rise and  high-rise office  buildings within  a 15  mile
radius  of Downtown San Diego and low rise office buildings in business parks in
the outlying submarkets.  Historically, most  development moved  east and  north
from these focal points. The Downtown San
 
                                       88
<PAGE>
Diego  portion of  the Central  City office  submarket is  considered to  be the
primary office submarket in  San Diego County, with  its main competition  being
the  La Jolla  and North City  (University Towne Center)  office submarkets. Set
forth below is  detailed submarket  information regarding the  San Diego  County
submarket:
 
                                SAN DIEGO COUNTY
                          OFFICE SUBMARKET STATISTICS
                              AT DECEMBER 31, 1995
 
<TABLE>
<CAPTION>
                                                                                            DIRECT
                                                                              DIRECT        VACANCY   NET ABSORPTION
SUBMARKET                                                     INVENTORY   AVAILABILITIES*    RATE        YTD 1995
- ------------------------------------------------------------  ----------  ---------------   -------   --------------
<S>                                                           <C>         <C>               <C>       <C>
SAN DIEGO MARKET
  South Bay.................................................   2,176,580       195,528        9.0%       (41,224)
  Central City (includes Downtown San Diego)................  16,059,577     2,689,327       16.7%       270,856
  East County...............................................   2,143,941       284,809       13.3%        11,990
  Mission Valley/Kearny Mesa................................  12,558,657     2,160,842       17.2%       (38,105)
  La Jolla/Morena...........................................   2,400,630       334,533       13.9%        87,849
  North City (University Towne Center)......................  12,801,915     1,584,187       12.4%        98,473
  I-15 Corridor.............................................   4,768,885       669,841       14.0%        25,512
  North Coast...............................................   5,415,053       622,373       11.5%        73,735
                                                              ----------  ---------------   -------      -------
    TOTAL...................................................  58,325,238     8,541,440       14.6%       489,086
                                                              ----------  ---------------   -------      -------
                                                              ----------  ---------------   -------      -------
</TABLE>
 
- ------------------------
Source: C&W Market Study
* Does not include currently leased but available sublease space.
 
PROPERTY LOCATED IN THE DOWNTOWN SAN DIEGO PORTION OF THE CENTRAL CITY OFFICE
SUBMARKET:
 
    IMPERIAL  BANK TOWER.   Imperial  Bank Tower  is a  24-story office building
    completed in 1982 and renovated in 1996. As of March 31, 1996, Imperial Bank
    Tower had a book value equal to or  greater than 10% of the total assets  of
    the  Company. The  Property contains  approximately 540,413  rentable square
    feet and 382 parking spaces in  an adjacent parking structure. The  Property
    is located in downtown San Diego's financial district approximately 1/2 mile
    from  Interstate 5. The building is  situated on approximately 30,056 square
    feet of land and includes a five-story atrium located on a 4,792 square foot
    parcel subject to a ground lease expiring in 2069. The Company has an option
    to purchase this parcel at fair market value. The adjacent 382-stall parking
    garage is situated on a 24,829 square foot parcel subject to a ground  lease
    expiring  in 2076, which may be purchased  by the Company after 2032 at fair
    market value. Additional parking is provided  on a lot east of the  building
    that  is subject to  a ground lease  expiring in the  year 2000. The average
    occupancy rate of the building was 89.4%, 89.4%, 85.5%, 81.9% and 83.0%  for
    the  years 1991  to 1995,  respectively. The  net effective  annual rent per
    square foot of  the building for  the same  period, from 1991  to 1995,  was
    $18.26,  $15.96, $19.00,  $18.76 and $17.72,  respectively. As  of August 1,
    1996, the building was 82.2% leased with an average Annualized Base Rent per
    leased square foot of $18.31. According to the C&W Market Study, as of April
    30, 1996,  the  Imperial  Bank  Tower  Peer  Group  contained  approximately
    4,087,971  square feet  of office  space inventory  in 11  buildings and had
    weighted average annual asking  rental rates ranging  from $18.53 to  $24.89
    per square foot with a direct vacancy rate of 11.9%. Primary tenants include
    Latham  & Watkins (56,425  square feet), Imperial  Bank Realty Corp. (38,855
    square feet), Merrill Lynch (32,455 square feet), Deloitte & Touche  (30,279
    square  feet), Arthur Anderson & Co. (18,754 square feet) and three agencies
    of the United States government. Latham &  Watkins, a law firm, is the  only
    tenant  which occupies ten percent or more of the rentable square footage of
    the building. Pursuant  to the  terms of its  lease, Latham  & Watkins  pays
    annual  base rent of approximately $1.05 million increasing to approximately
    $1.33 million in 1999 for the remainder  of the lease term which expires  in
    2004.  In addition, Latham &  Watkins has two renewal  options of five years
    each, three options  to expand  and two termination  options exercisable  on
    December 31, 1998 and May 1, 2001, respectively. Aggregate square footage of
    leases  expiring in 1996,  1997 and 1998  represent 4.9%, 7.9%,  6.4% of the
    Property's occupied square footage, respectively.
 
                                       89
<PAGE>
    The following table sets forth a schedule of lease expirations as of  August
1, 1996 for Imperial Bank Tower, assuming no tenants elect to renew their leases
at their scheduled expirations or elect to terminate their leases prior to their
scheduled expirations:
 
<TABLE>
<CAPTION>
                                           SQUARE FOOTAGE     PERCENTAGE OF       ANNUALIZED BASE        PERCENTAGE OF
                             NUMBER OF      OF EXPIRING    AGGREGATE PORTFOLIO   RENT OF EXPIRING     AGGREGATE PORTFOLIO
YEAR OF LEASE EXPIRATION  LEASES EXPIRING      LEASES      LEASED SQUARE FEET         LEASES          ANNUALIZED BASE RENT
- ------------------------  ---------------  --------------  -------------------  -------------------  ----------------------
<S>                       <C>              <C>             <C>                  <C>                  <C>
1996(1).................             4           21,682             0.60%          $     421,572                0.6%
1997....................             6           35,159             0.98               1,133,019                1.7
1998....................             5           28,457             0.79                 475,210                0.7
1999....................             3           15,702             0.44                 253,268                0.4
2000....................             4           43,243             1.20                 723,785                1.1
2001....................             4           34,053             0.95                 522,359                0.8
2002....................             5           73,527             2.05               1,361,766                2.0
2003....................             3           35,498             0.99                 666,911                1.0
2004....................             3           78,838             2.20               1,155,718                1.7
2005....................             3           56,641             1.58               1,004,432                1.5
2008 and thereafter.....             2           21,508             0.60                 418,116                0.6
                                    --
                                                -------            -----        -------------------           -----
    TOTAL...............            42          444,308            12.37%          $   8,136,154              12.12%
                                    --
                                    --
                                                -------            -----        -------------------           -----
                                                -------            -----        -------------------           -----
</TABLE>
 
- ------------------------
(1) Represents lease expirations data from August 1, 1996 to December 31, 1996.
 
C&W MARKET STUDY
 
   
    The  C&W Market Study was prepared for the Company by Cushman & Wakefield of
California,  Inc.,  which  is  a  real  estate  service  firm  with  significant
experience  and expertise relating to the Southern California office markets and
the various submarkets therein. The information in the C&W Market Study reflects
data available  at  December 31,  1995  and does  not  reflect data  or  changes
subsequent  to that date  (except that C&W Peer  Group information reflects data
available as  of April  30,  1996). This  market  study includes  an  historical
overview  of the office market trends for the three southern California counties
of Los Angeles, Orange, and San  Diego. The historical information compiled  for
and  referenced  in  this  document  was collected  by  Cushman  &  Wakefield of
California, Inc. from a variety of  sources, including (but not limited to)  the
Cushman & Wakefield Research Services Group, which conducts quarterly surveys of
competitive  office buildings  within numerous  submarkets on  a national basis,
telephone  interviews  with  landlords  and  leasing  agents  representing   the
competitive   office   properties   and   periodic   surveys   conducted   on  a
building-by-building basis  for the  markets  analyzed. The  scope of  the  work
conducted  for the Peer  Group Analyses included a  brief physical inspection of
each Property by Cushman &  Wakefield of California Valuation Advisory  Services
personnel,  a review  of the  competitive office  market, and  identification of
primary competitive  properties for  inclusion within  the Peer  Group based  on
market  criteria  such  as  physical  and  locational  characteristics,  and  an
inspection of the competitive office  properties within the specific  submarket.
The  physical information, current occupancy levels, and asking rental rates for
available space in the identified Peer Group buildings were compiled from direct
interviews with the landlords or their leasing agents by Cushman & Wakefield  of
California,  Inc. personnel. The  information contained in  the C&W Market Study
has been gathered by C&W from sources assumed to be reliable, including publicly
available  records.  Because  records  of  all  transactions  are  not   readily
available, the information contained in the C&W Market Study may not reflect all
transactions occurring in the geographic area discussed in the C&W Market Study.
In  addition, transactions that are reported  may not be described accurately or
completely in the publicly available records.
    
 
    In connection with the C&W Market Study, C&W made numerous assumptions  with
respect  to industry performance, general  business and economic conditions, and
other  matters.  Any  estimates   or  approximations  contained  therein   could
reasonably  be subject  to different  interpretations by  other parties. Because
predictions of future events are inherently subject to uncertainty, none of C&W,
the Company or  any other person  can assume that  such predicted rental  rates,
absorption,  or other  events will  occur as  outlined or  predicted in  the C&W
Market Study. Reported asking rental rates of properties, Replacement Cost Rents
or
 
                                       90
<PAGE>
estimated replacement costs  do not  purport to necessarily  reflect the  rental
rates  at  which properties  may actually  be rented,  actual rents  required to
support new development or  the actual cost of  replacement. In many  instances,
asking rents and actual rental rates differ significantly.
 
    Changes in local, national and international economic conditions will affect
the  markets  described in  the C&W  Market  Study. Therefore,  C&W can  give no
assurance that occupancy and absorption levels  and rental rates as of the  date
of  the C&W Market Study will continue  or that such occupancy levels and rental
rates will be attained at any time in the future. Forecasts of absorption rates,
rental  activity,  Replacement  Cost  Rents  and  replacement  costs  are  C&W's
estimates  as  of  the  date  of the  C&W  Market  Study.  Actual  future market
conditions may differ  materially from the  forecasts and projections  contained
therein.
 
    C&W  is a part of a national  network of affiliated companies providing real
estate services.  As  such, from  time  to time,  C&W  and its  affiliates  have
provided  and in the future may  provide real estate related services, including
brokerage and leasing agent services, to  the Company or its principals, or  may
represent the Company, its principals or others doing business with the Company.
C&W   received  compensation  of  approximately  $39,000  from  the  Company  in
connection with C&W's preparation of the C&W Market Study.
 
COMPETITION
 
    The Company may  be competing  with other  owners and  developers that  have
greater resources and more experience than the Company. Additionally, the number
of  competitive  properties  in any  particular  market in  which  the Company's
Properties are  located  could  have  a material  adverse  effect  on  both  the
Company's  ability  to  lease  space at  the  Properties  or  any newly-acquired
property and on the rents charged  at the Properties. The Company believes  that
the  Offering, the  Credit Facility and  its access  as a public  company to the
capital markets  to raise  funds  during periods  when conventional  sources  of
financing may be unavailable or prohibitively expensive will provide the Company
with  substantial competitive advantages. Further, the Company believes that the
number of real estate developers has  decreased as a result of the  recessionary
market  conditions and tight credit  markets during the early  1990's as well as
the reluctance  on the  part  of more  conventional  financing sources  to  fund
development and acquisition projects.
 
INSURANCE
 
    The  Operating Partnership  carries comprehensive  liability, fire, extended
coverage and rental loss insurance covering  all of the Properties, with  policy
specifications  and insured limits  which the Company  believes are adequate and
appropriate under  the circumstances.  The  Operating Partnership  also  carries
earthquake insurance on all of the Properties. There are, however, certain types
of  losses that are not generally insured because they are either uninsurable or
not economically  feasible to  insure. Should  an uninsured  loss or  a loss  in
excess of insured limits occur, the Operating Partnership could lose its capital
invested  in the Property, as  well as the anticipated  future revenues from the
Property and,  in the  case of  debt which  is with  recourse to  the  Operating
Partnership,  would remain  obligated for any  mortgage debt  or other financial
obligations related to the  Property. Any such loss  would adversely affect  the
Company.  Moreover,  as  a general  partner  of the  Operating  Partnership, the
Company will  generally be  liable for  any unsatisfied  obligations other  than
non-recourse   obligations.  The  Company  believes   that  the  Properties  are
adequately insured. In  addition, in  light of the  California earthquake  risk,
California  building codes since the  early 1970's have established construction
standards  for  all  newly  built  and  renovated  buildings,  including  office
buildings,  the current and strictest construction standards having been adopted
in 1984. Of the 24 Properties, 13 have been built since January 1, 1985 and  the
Company  believes that all of the Properties were constructed in full compliance
with the  applicable  standards existing  at  the time  of  construction.  While
earthquakes  have occurred in Southern California, the only loss the Company has
experienced as  a  result  of earthquakes  was  minor  damage to  three  of  its
buildings due to the Northridge earthquake, which resulted in $601,000 of damage
in  the year ended  December 31, 1994.  No assurance can  be given that material
losses in excess of insurance proceeds will not occur in the future.
 
ENVIRONMENTAL REGULATIONS
 
    Under various federal,  state and local  environmental laws, ordinances  and
regulations,  a current  or previous  owner or  operator of  real estate  may be
required to investigate and clean up hazardous or toxic substances or  petroleum
product  releases at  such property  and may  be held  liable to  a governmental
entity or  to  third parties  for  property  damage and  for  investigation  and
clean-up costs incurred by such parties in
 
                                       91
<PAGE>
connection   with  the  contamination.  Such   laws  typically  impose  clean-up
responsibility and liability  without regard  to whether  the owner  knew of  or
caused  the presence of the contaminants, and  the liability under such laws has
been interpreted to be joint and several unless the harm is divisible and  there
is   a  reasonable  basis  for  allocation   of  responsibility.  The  costs  of
investigation, remediation or removal of such substances may be substantial, and
the presence  of such  substances,  or the  failure  to properly  remediate  the
contamination on such property, may adversely affect the owner's ability to sell
or  rent such property or  to borrow using such  property as collateral. Persons
who arrange for the disposal or treatment of hazardous or toxic substances at  a
disposal  or treatment facility also  may be liable for  the costs of removal or
remediation of a release  of hazardous or toxic  substances at such disposal  or
treatment  facility, whether or not  such facility is owned  or operated by such
person. In addition, some environmental laws  create a lien on the  contaminated
site  in favor of  the government for  damages and costs  incurred in connection
with the contamination. Finally, the  owner of a site  may be subject to  common
law  claims  by  third  parties  based  on  damages  and  costs  resulting  from
environmental contamination emanating from such site.
 
    Certain federal, state and local laws, regulations and ordinances govern the
removal, encapsulation or  disturbance of ACM  when such materials  are in  poor
condition  or in the event of construction, remodeling, renovation or demolition
of a building. Such laws may impose liability for release of ACM and may provide
for third parties to seek recovery  from owners or operators of real  properties
for  personal injury associated  with ACM. In connection  with its ownership and
operation of the  Properties, the  Company may  be potentially  liable for  such
costs. ACM has been detected through sampling by environmental consultants at 70
South  Lake, 16000 Ventura Boulevard and  9665 Wilshire. The non-friable ACM was
found in certain floor tiles and  pipe wrappings at 16000 Ventura Boulevard  and
70  South  Lake  and in  vinyl  floor  tiles, carpet  mastic,  drywall mud/tape,
textured ceiling material,  core insulation  material and  fireproofing at  9665
Wilshire.  The  non-friable ACM  found at  these Properties  is not  expected to
present a risk as long as it continues to be properly managed. The environmental
consultants recommended no further ACM sampling or removal action at any of  the
Properties.
 
    In  the past two years, independent environmental consultants have conducted
or updated Phase I Assessments at the Properties. These Phase I Assessments have
included, among other  things, a  visual inspection  of the  Properties and  the
surrounding  area  and  a  review  of  relevant  state,  federal  and historical
documents. No  invasive techniques  such as  soil or  groundwater sampling  were
performed. The environmental consultants who conducted the Phase I Assessment at
the  Imperial Bank  Tower recommended  that a Phase  II study  be conducted with
respect to the possible presence of  an underground storage tank situated  under
the  Property's adjacent  parking garage,  which is  leased by  the Company. The
Company does not  believe that the  environmental consultants' findings  support
its  recommendation and, therefore, has elected not  to conduct a Phase II study
at the Imperial Bank  Tower. While the  Company is not aware  of any release  of
hazardous  materials or  environmental contamination at  the Property's adjacent
parking garage relating to the possible previous or current presence  thereunder
of  underground storage tanks, or otherwise,  if such a release of environmental
contamination has occurred  or were to  occur, and the  lessor, who has  primary
environmental  liability  as  owner  of the  underlying  land,  has insufficient
financial resources  to satisfy  its potential  environmental liability  or  any
indemnification obligations it owes the Company under the Company's lease of the
Property, the Company may incur remediation expenses that could adversely affect
the Company's ability to make expected distributions.
 
    The  Company's Phase I  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.
Nevertheless,  it  is possible  that the  Company's Phase  I 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.
 
                                       92
<PAGE>
    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, except as noted
above. 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, other than as noted above.
 
LEGAL PROCEEDINGS
 
    As a result of its acquisition of the Properties, the Company will become  a
successor party-in-interest to certain legal proceedings arising in the ordinary
course  of business of the Arden Predecessors.  The Company does not expect that
these proceedings, in the aggregate, will have a material adverse effect on  the
Company.
 
EMPLOYEES
 
    Upon  consummation  of  the  Offering and  the  Formation  Transactions, the
Company will employ approximately  50 persons, including  7 senior officers  and
personnel  in the  areas of acquisition  and business  development (3), property
management (27), financial services (11) and legal affairs (1).
 
                                       93
<PAGE>
                                   MANAGEMENT
 
DIRECTORS AND EXECUTIVE OFFICERS
 
    The Board of Directors of the Company will be expanded immediately following
the  consummation of the Offering to  include the director nominees named below,
each of  whom has  been nominated  for  election and  consented to  serve.  Upon
election of the director nominees, there will be a majority of directors who are
not  employees or affiliates of the Company.  Pursuant to the Charter, the Board
of Directors is divided  into three classes of  directors. The initial terms  of
the  first,  second  and third  classes  will  expire in  1997,  1998  and 1999,
respectively. Beginning in  1997, directors  of each  class will  be chosen  for
three-year  terms upon the expiration  of their current terms  and each year one
class of directors  will be elected  by the stockholders.  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. Holders of shares of Common Stock will have no right to
cumulative voting in  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
terms expire at that meeting.
 
    The following  table sets  forth  certain information  with respect  to  the
directors,  director nominees and executive  officers of the Company immediately
following the consummation of this Offering:
 
<TABLE>
<CAPTION>
NAME                      AGE                                   POSITION                                  TERM
- --------------------      ---      -------------------------------------------------------------------  ---------
<S>                   <C>          <C>                                                                  <C>
Richard S. Ziman              53   Chairman of the Board and Chief Executive Officer                         1999
 
Victor J. Coleman             35   President, Chief Operating Officer and Director                           1999
 
Diana M. Laing                41   Chief Financial Officer
 
Michele Byer                  50   Chief Accounting Officer and Secretary
 
Brigitta B. Troy              56   Executive Vice President and Director of Acquisitions
 
Andrew J. Sobel               37   Executive Vice President and Director of Leasing
 
Herbert L. Porter             58   Senior Vice President and Director of Construction and Capital
                                    Improvements
 
Arthur Gilbert                83   Director Nominee                                                          1998
 
Steven C. Good                54   Director Nominee                                                          1998
 
Jerry Asher                   62   Director Nominee                                                          1997
 
Carl D. Covitz                57   Director Nominee                                                          1997
 
Kenneth B. Roath              60   Director Nominee                                                          1997
</TABLE>
 
    The following is a biographical summary of the experience of the  directors,
director nominees and executive officers of the Company:
 
    RICHARD  S. ZIMAN.  Mr. Ziman has served as the Chairman and Chief Executive
Officer of the Company and as a Director of the Company since its formation.  He
has  been involved in the  real estate industry for over  25 years. In 1990, Mr.
Ziman formed  Arden and  has  served as  its Chairman  of  the Board  and  Chief
Executive  Officer since its inception. In  1979 he co-founded Pacific Financial
Group, a diversified real estate  investment and development firm  headquartered
in  Beverly  Hills, of  which he  was  the Managing  General Partner.  Mr. Ziman
received his Bachelor's Degree and his  Juris Doctor Degree from the  University
of  Southern California and practiced law as a partner of the law firm of Loeb &
Loeb from 1971 to 1980, specializing  in transactional and financing aspects  of
real estate.
 
    VICTOR  J.  COLEMAN.   Mr. Coleman  has  served as  the President  and Chief
Operating Officer of  the Company and  as a  Director of the  Company since  its
formation. He is also the President, Chief Operating
 
                                       94
<PAGE>
Officer  and  co-founder of  Arden.  From 1987  to  1989, Mr.  Coleman  was Vice
President of Los Angeles  Realty Services, Inc. and  earlier in his career  from
1985 to 1987 was Director of Marketing/Investment Advisor of Development Systems
International and an associate at Drexel Burnham Lambert specializing in private
placements with institutional and individual investors. Mr. Coleman received his
Bachelor's Degree from the University of California at Berkeley and received his
Master of Business Administration from Golden Gate University.
 
    DIANA  M. LAING.   Ms. Laing  will serve  as Chief Financial  Officer of the
Company. Prior to joining the Company, Ms.  Laing served, from 1985 to 1996,  as
Executive  Vice President  and Chief  Financial Officer  of South  West Property
Trust, Inc.,  a  publicly traded  apartment  properties real  estate  investment
trust,  and its  predecessor Southwest Realty,  Ltd. Ms. Laing  also served from
1982 to 1985 as  Controller, Treasurer and  Vice President-Finance of  Southwest
Realty,  Ltd. From 1981  to 1982, Ms.  Laing was Controller  of Crawford Energy,
Inc. and she served as a member of the audit staff of Arthur Andersen &  Company
from  1978 to 1981. Ms.  Laing is a Certified Public  Accountant and a member of
the American Institute of CPAs and the Texas Society of Public Accountants.  She
is  also a Director of Sterling House Corporation, a publicly traded operator of
assisted  living  centers.  Ms.  Laing  received  her  Bachelor  of  Science  in
Accounting from Oklahoma State University.
 
    MICHELE BYER.  Ms. Byer has served as Chief Accounting Officer and Secretary
of  the Company since its formation. Ms. Byer  has 28 years of experience in the
real estate industry,  of which the  last 13  have been with  Arden and  Pacific
Financial  Group. Prior to joining Pacific  Financial Group and the Company, Ms.
Byer was  a practicing  CPA with  the  firm Kenneth  Leventhal &  Company  which
specialized  in  real  estate.  She  received  her  Bachelor's  Degree  from the
University of California at Los Angeles.
 
    BRIGITTA B.  TROY.   Ms. Troy  has served  as Executive  Vice President  and
Director of Acquisitions of the Company since its formation. She joined Arden in
1993  and was Director of Acquisitions for  Pacific Financial Group from 1982 to
1989. During  the period  from 1989  to 1993,  she was  a principal  of  Esquire
Investment  Partners, a  real estate advisory  company. A  graduate of Radcliffe
College, Ms.  Troy received  her  Juris Doctor  Degree  from the  University  of
Southern California Law School and a Master of Business Administration from UCLA
Graduate  School of  Management. Ms.  Troy has over  15 years  experience in the
commercial real estate business.
 
    ANDREW J.  SOBEL.   Mr. Sobel  has served  as Executive  Vice President  and
Director of Leasing of the Company since its formation. He joined Arden in 1992.
Mr. Sobel is an attorney admitted to the State Bar of California in 1985 with 11
years  of experience in the practice of real  estate law. From 1990 to 1992, Mr.
Sobel was a sole practitioner. From 1987 to 1990 he was an attorney with the law
firm of Pircher, Nichols & Meeks specializing in all aspects of its real  estate
transactional  practice  including  acquisitions, leasings  and  financings. Mr.
Sobel received his Bachelor's Degree from State University of New York at Oswego
and his Juris Doctor Degree from the University of California at Berkeley (Boalt
Hall).
 
    HERBERT L. PORTER.  Mr.  Porter is a Senior  Vice President and Director  of
Construction  and Capital Improvements of the  Company. He joined Arden in 1993.
Prior to joining Arden from 1973 to 1992, Mr. Porter was a partner/owner in  his
own  real  estate development  and property  management company  specializing in
medium to  high-rise  commercial office  buildings.  Mr. Porter's  23  years  in
commercial   office  development   include  planning,   financing,  acquisition,
entitlements and  approvals, design,  construction, marketing,  leasing,  tenant
improvements  and outright sale. Mr. Porter  received his Bachelor's Degree from
the University of Southern California.
 
   
    ARTHUR GILBERT.  Mr. Gilbert has agreed to serve as a member of the Board of
Directors of the Company commencing upon  the consummation of the Offering.  Mr.
Gilbert  has  been involved  in  the real  estate  business for  over  50 years,
including as a private investor for the last five years, and has developed  over
6  million  square  feet of  office,  industrial and  retail  properties located
primarily in Southern  California. He  is an  Honorary Trustee  of the  National
Board of Directors of American Technion Society.
    
 
    STEVEN  C. GOOD.  Mr. Good  has agreed to serve as  a member of the Board of
Directors of the Company commencing upon  the consummation of the Offering.  Mr.
Good is the senior partner in the firm of Good
 
                                       95
<PAGE>
   
Swartz  & Berns, an  accountancy corporation founded in  1993 which evolved from
the firm of Block, Good and Gagerman,  which he founded in 1976. Prior to  1976,
Mr. Good was a partner first at Laventhol & Horwath, a national accounting firm,
and  later at Horowitz  & Good. Mr.  Good is a  founder and past  Chairman of CU
Bancorp, where he directed the bank's operations from 1982 through 1989. For the
past seven years he has been a member of the Board of Directors of Opto Sensors,
Incorporated.  Mr.  Good   received  his   Bachelor  of   Science  in   Business
Administration  from the  University of California  at Los  Angeles and attended
UCLA's Graduate School.
    
 
    JERRY ASHER.   Mr. Asher has  agreed to serve  as a member  of the Board  of
Directors  of the Company commencing upon  the consummation of the Offering. For
the past 27  years, Mr. Asher  has been  employed by CB  Commercial Real  Estate
Group,  Inc.  ("CB  Commercial")  where  he  has  served  in  various capacities
involving the Southern  California real  estate industry.  Most recently,  since
1994,  Mr. Asher  has served as  Executive Vice President,  Director of Business
Development of CB Commercial with  responsibility for implementing its  business
development and marketing activities in both domestic and international markets.
Mr.  Asher has also served  in the following capacities,  among others, since he
joined CB Commerical  in 1969:  Executive Vice President,  Regional Manager  for
Southern  California (1991  to 1994);  Southern California  Regional Manager and
Senior Vice  President  (1984 to  1991);  and National  Director  of  Investment
Properties  (1983 to 1984).  Mr. Asher is  currently the Chairman  of the Cedars
Sinai Medical Center - Real Estate  Industry Division. He received his  Bachelor
of  Science  in  Real  Estate  and  Finance  from  the  University  of  Southern
California.
 
    CARL D. COVITZ.  Mr. Covitz has agreed to serve as a member of the Board  of
Directors  of the Company commencing upon  the consummation of the Offering. For
18 of the past  23 years, Mr. Covitz  has served as the  owner and President  of
Landmark  Capital,  Inc.,  a  national real  estate  development  and investment
company involved in  the construction,  financing, ownership  and management  of
commercial,   residential,  and  warehouse  properties.   Mr.  Covitz  has  also
previously  served,  from  1990   to  1993,  as   Secretary  of  the   Business,
Transportation  & Housing  Agency of  the State of  California as  well as Under
Secretary and Chief  Operating Officer  of the  U.S. Department  of Housing  and
Urban Development from 1987 to 1989. Mr. Covitz is currently the Chairman of the
Board  of Directors of Century  Housing Corporation and is  the past Chairman of
the Board of several organizations including  the Federal Home Loan Bank of  San
Francisco  and the Los  Angeles City Housing Authority.  Mr. Covitz received his
Bachelor's Degree from the Wharton School at the University of Pennsylvania  and
his  Master  of Business  Administration from  the Columbia  University Graduate
School of Business.
 
    KENNETH B. ROATH.  Mr. Roath has agreed to serve as a member of the Board of
Directors of the Company commencing upon  the consummation of the Offering.  Mr.
Roath  is currently  Chairman, President and  Chief Executive  Officer of Health
Care Property Investors, Inc., a leader in the health care REIT industry.  Prior
to  joining Health Care Property  Investors, Inc. at its  inception in 1985, Mr.
Roath was employed for 17 years  by Pacific Holding Corporation of Los  Angeles,
the  last four of which he served  as President and Chief Operating Officer. Mr.
Roath is the immediate past  Chairman of NAREIT and also  serves as a member  of
the  Board of Governors and  Executive Committee of NAREIT.  He is a director of
Franchise Finance  Corporation of  America. Mr.  Roath received  his  Bachelor's
Degree in accounting from San Diego State University.
 
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  will
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 non-employee directors.
 
    EXECUTIVE  COMMITTEE.  Promptly following  the consummation of the Offering,
the Board of  Directors will establish  an Executive Committee.  Subject to  the
Company's conflict of interest policies, the Executive
 
                                       96
<PAGE>
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  at  least   two
non-employee directors.
 
    COMPENSATION   COMMITTEE.    Promptly  following  the  consummation  of  the
Offering, the  Board of  Directors will  establish a  Compensation Committee  to
establish  remuneration  levels  for  executive  officers  of  the  Company  and
implement the Company's Stock Incentive  Plan and any other incentive  programs.
The  Compensation Committee will  initially consist of  two or more non-employee
directors.
 
    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 non-employee directors annual compensation of
$18,000  for their services. In addition,  non-employee directors will receive a
fee of  $1,000  for  each  Board of  Directors  meeting  attended.  Non-employee
directors  attending any  committee meetings will  receive an  additional fee of
$1,000 for each committee meeting attended, unless the committee meeting is held
on the day of a meeting of  the Board of Directors. Non-employee directors  will
also  be  reimbursed for  reasonable expenses  incurred  to attend  director and
committee meetings. Officers of the Company  who are directors will not be  paid
any  directors' fees. Non-employee directors will receive, upon initial election
to the Board of Directors, an option  to purchase 10,000 shares of Common  Stock
which will vest over four years.
 
EXECUTIVE COMPENSATION
 
    Prior  to the  Offering, the  Company did  not pay  any compensation  to its
officers. The following table below sets forth the annual base salary rates  and
other  compensation expected to be paid in 1996 to the Company's Chief Executive
Officer and each of the Company's  five other most highly compensated  executive
officers (the "Named Executive Officers").
 
<TABLE>
<CAPTION>
                                                                              1996 BASE     OPTIONS      STOCK
NAME                                          TITLE                          SALARY RATE  ALLOCATED(1)   BONUS
- --------------------  -----------------------------------------------------  -----------  -----------  ---------
<S>                   <C>                                                    <C>          <C>          <C>
Richard S. Ziman      Chairman of the Board and Chief Executive Officer       $ 300,000      400,000      --
 
Victor J. Coleman     President, Chief Operating Officer and Director           250,000      250,000      --
 
Diana M. Laing        Chief Financial Officer                                   195,000       50,000      --
 
Michele Byer          Chief Accounting Officer and Secretary                    125,000       40,000      --
 
Herbert L. Porter     Senior Vice President and Director of Construction
                       and Capital Improvements                                 120,000       30,000       1,250(2)
 
Andrew J. Sobel       Executive Vice President and Director of Leasing          110,000       40,000       3,750(2)
</TABLE>
 
- ------------------------
(1) All  options will vest over three years (i.e., one-third of each executive's
    options will  vest  and  be  exercisable on  the  first,  second  and  third
    anniversaries,  respectively, of  the closing of  the Offering)  and will be
    exercisable at a price per share equal to the initial public offering  price
    per share of Common Stock offered hereby.
 
(2) Represents a one time Common Stock bonus.
 
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<PAGE>
EMPLOYMENT AGREEMENTS
 
    Each  of Messrs. Ziman  and Coleman will enter  into an employment agreement
with the Company which will be effective as of the consummation of the Offering.
The employment agreements of Messrs. Ziman and Coleman will have an initial term
of three years and  will be subject to  automatic one-year extensions  following
the  expiration  of  the initial  term.  For the  first  year of  the  term, the
employment agreements of Messrs. Ziman and Coleman provide for an initial annual
base compensation in the amounts set  forth in the Executive Compensation  table
with  the  amount of  any initial  bonus  to be  determined by  the Compensation
Committee. For subsequent years,  both the amount of  the base compensation  and
any bonus will be determined by the Compensation Committee.
 
    In  addition, Ms.  Laing has entered  into an employment  agreement with the
Company effective August 1, 1996  which has an initial term  of one year and  is
subject to automatic one-year extensions following the expiration of the initial
term.  Ms.  Laing's employment  agreement provides  for  an initial  annual base
compensation in the  amount set forth  in the Executive  Compensation table  and
entitles  her to  an initial  cash bonus in  an amount  to be  determined by the
Compensation Committee  but  not  to  exceed 20%  of  her  initial  annual  base
compensation.  For any  subsequent years  in which  the employment  agreement is
extended beyond the initial  term, the amount of  Ms. Laing's base  compensation
and any bonus will be determined by the Compensation Committee.
 
    The employment agreements of Messrs. Ziman and Coleman and Ms. Laing entitle
the  executives  to  participate in  the  Company's Stock  Incentive  Plan (each
executive will initially be allocated the  number of stock options set forth  in
the  Executive Compensation  table) and to  receive certain  other insurance and
pension benefits. In  addition, in  the event of  a termination  by the  Company
without  "cause,"  a  termination  by  the executive  for  "good  reason,"  or a
termination pursuant to a "change in control" of the Company (as such terms  are
defined  in the respective employment agreements), the terminated executive will
be entitled to (i) a single severance payment (the "Severance Amount") and  (ii)
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 its executive employees for  a
specified  period of time  following the date  of termination (collectively, the
"Severance Benefits").  The Severance  Amount of  Messrs. Ziman  and Coleman  is
equal  to the sum of two times  the executive's average annual base compensation
and two times the highest annual bonus received during the preceding  thirty-six
month  period. The  Severance Amount  of Ms. Laing  is equal  to the executive's
annual base  compensation for  the preceding  12 month  period. Receipt  of  the
Severance  Benefits  shall continue  for  two years  commencing  on the  date of
termination in the case of Messrs. Ziman and Coleman and for one year commencing
on the date of termination in the case of Ms. Laing.
 
    As part of their  employment agreements, each of  Messrs. Ziman and  Coleman
will  be bound  by a non-competition  covenant with the  Company which prohibits
them from engaging in (i) the acquisition, renovation, management or leasing  of
any  office properties  in the  Los Angeles,  Orange and  San Diego  counties of
Southern California and (ii) any active  or passive investment in or  reasonably
relating  to  the  acquisition,  renovation,  management  or  leasing  of office
properties in  the  Los Angeles,  Orange  and  San Diego  counties  of  Southern
California  for a  period of  one year  following the  date of  such executive's
termination, unless such termination was without cause.
 
STOCK INCENTIVE PLAN
 
    Prior to the consummation of the Offering, the Company intends to adopt  the
Stock  Incentive  Plan for  the purpose  of  attracting and  retaining executive
officers, directors and employees.
 
    The Stock  Incentive Plan  will  be qualified  under  Rule 16b-3  under  the
Securities  Exchange Act  of 1934,  as amended  (the "Exchange  Act"). The Stock
Incentive Plan will be  administered by the  Compensation Committee and  provide
for the granting of stock options, stock appreciation rights or restricted stock
with respect to up to 1,500,000 shares of Common Stock to executive or other key
employees of the Company. Stock options may be granted in the form of "incentive
stock    options,"    as    defined    in    Section    422    of    the   Code,
 
                                       98
<PAGE>
or non-statutory stock options and are exercisable for up to 10 years  following
the  date  of grant.  The  exercise price  of  each option  will  be set  by the
Compensation Committee;  provided, however,  that the  price per  share must  be
equal  to or greater than the fair market value of the Common Stock on the grant
date.
 
    The  Stock  Incentive  Plan  also   provides  for  the  issuance  of   stock
appreciation  rights which  will generally entitle  a holder to  receive cash or
stock, as determined  by the  Compensation Committee,  at the  time of  exercise
equal  to the difference between the exercise price and the fair market value of
the Common Stock. In addition, the  Stock Incentive Plan permits the Company  to
issue  shares of restricted stock to executive  or other key employees upon such
terms and conditions as shall be determined by the Compensation Committee.
 
401(K) PLAN
 
    Effective upon  the consummation  of the  Offering, the  Company intends  to
establish  the Arden  Realty Group  Section 401(k)  Savings/Retirement Plan (the
"401(k) Plan") to  cover eligible employees  of the Company  and any  designated
affiliate.
 
    The 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 401(k) Plan. The Company currently does
not  intend  to make  matching  contributions to  the  401(k) Plan;  however, it
reserves the  right  to  make matching  contributions  or  discretionary  profit
sharing contributions in the future.
 
    The 401(k) Plan is designed to qualify under Section 401 of the Code so that
contributions  by employees  or by  the Company to  the 401(k)  Plan, and income
earned on plan contributions, are not taxable to employees until withdrawn  from
the  401(k) Plan,  and so  that contributions  by the  Company, if  any, will be
deductible by the Company when made.
 
LIMITATION OF LIABILITY AND INDEMNIFICATION
 
    The MGCL  permits  a  Maryland  corporation to  include  in  its  charter  a
provision   limiting  the  liability  of  its  directors  and  officers  to  the
corporation  and  its  stockholders  for  money  damages  except  for  liability
resulting  from (a) actual  receipt of an  improper benefit or  profit in money,
property or services or  (b) active and deliberate  dishonesty established by  a
final  judgment as being material  to the cause of  action. The Charter contains
such a provision which eliminates such liability to the maximum extent permitted
by the MGCL.
 
    The Charter  authorizes the  Company,  to the  maximum extent  permitted  by
Maryland law, to obligate itself to indemnify and to pay or reimburse reasonable
expenses  in advance of final disposition of  a proceeding to (a) any present or
former director or officer or  (b) any individual who,  while a director of  the
Company  and  at  the request  of  the  Company, serves  or  has  served another
corporation, partnership, joint  venture, trust,  employee benefit  plan or  any
other enterprise as a director, officer, partner or trustee of such corporation,
partnership,  joint venture,  trust, employee  benefit plan  or other enterprise
from and against  any claim  or liability  to which  such persons  may incur  by
reason  of his status as a present or former stockholder, director or officer of
the Company. The Bylaws obligate the Company, to the maximum extent permitted by
Maryland law,  to indemnify  and  to pay  or  reimburse reasonable  expenses  in
advance  of  final disposition  of a  proceeding  to (a)  any present  or former
director or officer  who is  made a  party to the  proceeding by  reason of  his
service  in that  capacity or (b)  any individual  who, while a  director of the
Company and  at  the  request of  the  Company,  serves or  has  served  another
corporation,  partnership, joint  venture, trust,  employee benefit  plan or any
other enterprise as a director, officer, partner or trustee of such corporation,
partnership, joint venture, trust, employee benefit plan or other enterprise and
who is made a party to the proceeding by reason of his service in that  capacity
against  any claim or liability to which he may become subject by reason of such
service. The Charter  and the Bylaws  also permit the  Company to indemnify  and
advance expenses to any person who served a predecessor of the Company in any of
the  capacities described above and to any employee or agent of the Company or a
predecessor of the Company.
 
    The MGCL  requires a  corporation (unless  its charter  provides  otherwise,
which the Company's Charter does not) to indemnify a director or officer who has
been successful, on the merits or otherwise, in the
 
                                       99
<PAGE>
defense  of any proceeding to which he is  made a party by reason of his service
in that capacity. The  MGCL permits a corporation  to indemnify its present  and
former  directors  and  officers, among  others,  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 (a) the
act or omission of  the director or  officer was material  to the matter  giving
rise to the proceeding and (i) was committed in bad faith or (ii) was the result
of  active  and  deliberate dishonesty,  (b)  the director  or  officer actually
received an improper personal benefit in  money, property or services or (c)  in
the  case of  any criminal  proceeding, the  director or  officer had reasonable
cause to believe  that the  act or omission  was unlawful.  However, a  Maryland
corporation  may not indemnify  for an adverse judgment  in a suit  by or in the
right of  the corporation.  In addition,  the MGCL  requires the  Company, as  a
condition  to advancing  expenses, to  obtain (a)  a written  affirmation by the
director or officer of  his good faith  belief that he has  met the standard  of
conduct necessary for indemnification by the Company as authorized by the Bylaws
and  (b) a written  statement by or  on his behalf  to repay the  amount paid or
reimbursed by the Company if it shall ultimately be determined that the standard
of conduct was not met.
 
    The Partnership Agreement also provides  for indemnification and advance  of
expenses  of  the Company  and its  officers  and directors  to the  same extent
indemnification and advance of expenses is provided to officers and directors of
the Company in the Charter and Bylaws,  and limits the liability of the  Company
and  its officers and directors to the Operating Partnership and its partners to
the same  extent liability  of officers  and  directors of  the Company  to  the
Company  and its  stockholders is  limited under  the Charter.  See "Partnership
Agreement -- Indemnification."
 
                     STRUCTURE AND FORMATION OF THE COMPANY
 
THE OPERATING ENTITIES OF THE COMPANY
 
    Following the consummation of the  Offering and the Formation  Transactions,
the  operations  of  the  Company  will  be  carried  on  through  the Operating
Partnership. The Formation Transactions were designed to (i) enable the  Company
to  raise  the necessary  capital to  acquire the  Properties and  repay certain
mortgage debt relating thereto, (ii) provide a vehicle for future  acquisitions,
(iii)  enable the Company to comply  with certain requirements under the federal
income tax code  and regulations  relating to REITs,  (iv) facilitate  potential
securitized  mortgage  financings and  (v) preserve  certain tax  advantages for
certain Arden Predecessors.
 
    THE OPERATING PARTNERSHIP
 
    Following the  closing  of  the Offering  and  the  Formation  Transactions,
substantially  all of the Company's  assets will be held  by, and its operations
conducted through, the Operating Partnership, of  which the Company will be  the
sole  general partner. The Company's interest  in the Operating Partnership will
entitle it to share in  cash distributions from, and  in the profits and  losses
of,  the  Operating  Partnership  in  proportion  to  the  Company's  percentage
ownership, which initially will  be approximately 86.69%. Certain  Participants,
including  Messrs. Ziman, Coleman and Gilbert, Ms.  Byer and Arden, will own the
remaining OP Units. Beginning one year  after the consummation of the  Offering,
any  holder of OP  Units may cause  the Operating Partnership  to redeem such OP
Units for cash or, at  the election of the Company,  exchange such OP Units  for
shares  of Common  Stock of  the Company  (on a  one-for-one basis),  subject to
certain limitations. See "Partnership Agreement -- Redemption/Exchange  Rights."
With  each redemption or exchange of OP Units, the Company's percentage interest
in the Operating Partnership will increase.
 
    As the sole general partner of  the Operating Partnership, the Company  will
generally have the exclusive power under the Partnership Agreement to manage and
conduct  the business of  the Operating Partnership,  subject to certain limited
exceptions. See "Partnership  Agreement -- Management."  The Board of  Directors
will manage the affairs of the Company by directing the affairs of the Operating
Partnership.   The  Operating  Partnership  cannot   be  terminated  (except  in
connection with a sale of all or substantially all of the assets of the Company,
a business combination or as the result of judicial decree or the redemption  of
all  of the OP Units held by the limited partners) until the year 2096 without a
vote of  the partners  of  the Operating  Partnership. For  further  information
regarding the Operating Partnership, see "Partnership Agreement."
 
                                      100
<PAGE>
THE FORMATION TRANSACTIONS
 
    OWNERSHIP OF THE PROPERTIES PRIOR TO THE FORMATION TRANSACTIONS
 
    The  Arden Predecessors own 16 of the Properties directly through fee simple
interests and four Properties which are  subject to long term ground leases  and
hold  an undivided tenancy in common interest in two other Properties, which are
also partially owned  by unrelated  third parties  who will  participate in  the
Formation  Transactions. The two  Acquisition Properties are  owned by unrelated
third  parties  who  have  entered  into  agreements  to  sell  the   respective
Acquisition  Properties to Arden.  Each of the Arden  Predecessors was formed at
various times  over the  last 3  1/2  years, generally  in connection  with  the
initial  acquisition of a Property or an  interest in the Property by such Arden
Predecessor. The  Arden  Predecessors,  which directly  own  the  Properties  or
interests in the Properties, are comprised primarily of partnerships and limited
liability companies which are owned by Messrs. Ziman and Coleman, and certain of
their  relatives and affiliates and by other  third parties. In addition, all of
the properties are  managed by  Messrs. Ziman  and Coleman  directly or  through
affiliates of the Arden Predecessors.
 
    Arden  has been engaged  in the property  management, leasing and renovation
business for over five years and, in connection therewith, has provided services
to 22 of  the Properties and  to properties  owned by third  parties. After  the
consummation  of  the Offering  and  the Formation  Transactions,  the Operating
Partnership will  continue to  carry  on the  property management,  leasing  and
renovation  business with  respect to the  Properties carried on  by Arden prior
thereto.
 
    PRE-FORMATION TRANSACTIONS
 
    - The Company filed Articles of  Incorporation with the State Department  of
      Assessments and Taxation of Maryland on May 1, 1996.
 
    - The  Operating  Partnership was  formed effective  May  20, 1996  with the
      Company as the sole  general partner and Mr.  Coleman as the sole  limited
      partner.
 
    - All  of the  Participants have entered  into an Option  Agreement with the
      Company and/or a Contribution Agreement with the Operating Partnership  to
      transfer  their ownership interests in  the Arden Predecessors, in certain
      of the Properties or, with respect to Arden, in certain of its assets,  to
      the  Operating Partnership in exchange for OP  Units or to the Company for
      cash. See  "Risk  Factors  --  Conflicts of  Interests  in  the  Formation
      Transactions and the Business of the Company."
 
    FORMATION TRANSACTIONS
 
    Concurrently  with  the  consummation  of  the  Offering,  the  Company, the
Operating  Partnership  and  the  Participants  will  engage  in  the  following
Formation Transactions.
 
    - The Company will sell shares of Common Stock in the Offering.
 
    - Pursuant  to the Option Agreements, the Company will acquire for cash from
      certain Participants  (other  than  Messrs. Ziman  and  Coleman  who  will
      receive  no cash from  the Formation Transactions)  the interests owned by
      such Participants in certain of the  Arden Predecessors and in certain  of
      the  Properties. The Company will pay approximately $26.8 million from the
      net proceeds of the Offering for  such interests which represent 31.7%  of
      the ownership interests in the Properties to be acquired by the Company.
 
    - The  Company will contribute  (i) the interests  in the Arden Predecessors
      and in the Properties acquired pursuant to the Option Agreements and  (ii)
      the   net  proceeds  from   the  Offering  (after   payment  of  the  cash
      consideration to certain Participants as described above) to the Operating
      Partnership in  exchange for  a  86.69% general  partner interest  in  the
      Operating Partnership.
 
    - Pursuant   to  the  Contribution   Agreements,  the  following  additional
      contributions will be made to the Operating Partnership in exchange for OP
      Units representing limited  partners interests:  (i) certain  Participants
      will  contribute the remaining interests in  the Arden Predecessors and in
      certain of  the Properties  (  I.E., all  interests  not acquired  by  the
      Company  pursuant to the Option Agreements) and (ii) Arden will contribute
      certain of its assets, including management contracts relating to  certain
      of
 
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      the  Properties  and  the  contract  rights  to  purchase  the Acquisition
      Properties. The Participants making such  contributions (a total of  seven
      individuals  and entities including Messrs. Ziman, Coleman and Gilbert and
      Ms. Byer)  will  receive an  aggregate  of  2,889,071 OP  Units,  with  an
      estimated  value  of  approximately  $57.8 million  based  on  the assumed
      initial public  offering price  of the  Common Stock.  The aggregate  book
      value of the interests and assets to be transferred to the Company and the
      Operating  Partnership  is  approximately $14.1  million  of  which $2,000
      constitutes the aggregate  book value  of the  interest and  assets to  be
      transferred to the Operating Partnership by Messrs. Ziman and Coleman.
 
    - The  Company, through the Operating Partnership, will borrow approximately
      $104 million aggregate principal amount pursuant to the Mortgage Financing
      which will be secured by fully cross-collateralized, cross-defaulted first
      mortgage liens on the Mortgage Financing Properties.
 
    - Approximately $35 million of the net proceeds of the Offering will be used
      by the Operating Partnership to purchase the Acquisition Properties.
 
    - Approximately $398 million  of the net  proceeds of the  Offering and  the
      $103  million net proceeds of  the Mortgage Financing will  be used by the
      Operating Partnership  to  repay  certain mortgage  debt  secured  by  the
      Properties  and indebtedness  outstanding under  lines of  credit, and the
      related additional  and accrued  interest thereon,  to be  assumed by  the
      Operating Partnership in the Formation Transactions.
 
    - The  Company, through the Operating Partnership, is expected to enter into
      the $100 million Credit  Facility at or shortly  after the closing of  the
      foregoing Formation Transactions.
 
CONSEQUENCES OF THE OFFERING AND THE FORMATION TRANSACTIONS
 
    The  Offering and  the Formation Transactions  will result  in the following
consequences:
 
    - The Operating  Partnership will  directly  or indirectly  own all  of  the
      Properties by virtue of the Operating Partnership's acquisition of 100% of
      the   interests  in   the  Arden  Predecessors,   the  Property  interests
      contributed by certain Participants and  the assets contributed by  Arden.
      In  connection with  the CMBS Offering  it is expected  that the Operating
      Partnership will transfer the Mortgage Financing Properties to a financing
      subsidiary.
 
    - The purchasers of the Common Stock offered in the Offering will own all of
      the outstanding Common Stock.
 
    - The Company will be  the sole general  partner of, and  own 86.71% of  the
      ownership interests in, the Operating Partnership.
 
    If  all limited partners of the Operating Partnership were to exchange their
OP  Units  for  Common  Stock  immediately  after  completion  of  the  Offering
(notwithstanding the provision of the Partnership Agreement which prohibits such
exchange  prior to the  first anniversary of the  consummation of the Offering),
but subject to  the Common Stock  Ownership Limit, then  the Participants  would
beneficially  own approximately 13.29% of the outstanding Common Stock (of which
6.57%, 3.48%, 2.32%  and 0.23%  would be  beneficially owned  by Messrs.  Ziman,
Coleman, Gilbert and Ms. Byer, respectively).
 
    See  "Risk Factors --  Conflicts of Interests  in the Formation Transactions
and  the  Business  of  the  Company;  Benefits  from  Formation  Transactions,"
"Partnership   Agreement   --   Redemption/Exchange   Rights"   and   "Principal
Stockholders."
 
DETERMINATION AND VALUATION OF OWNERSHIP INTERESTS
 
    The  Company's  percentage  interest   in  the  Operating  Partnership   was
determined   based  upon  the   percentage  of  estimated   Cash  Available  for
Distribution required to pay expected cash distributions on the shares of Common
Stock to be  issued in the  Offering resulting in  an annual distribution  rate,
assuming  one annual  distribution period,  equal to  8% of  the assumed initial
public offering  price  of the  Common  Stock.  The ownership  interest  in  the
Operating  Partnership allocated to  the Company is equal  to this percentage of
estimated Cash  Available for  Distribution and  the remaining  interest in  the
Operating Partnership was
 
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<PAGE>
allocated  to the Participants receiving OP Units in the Formation Transactions.
The parameters and assumptions used in deriving the estimated Cash Available for
Distribution are described under "Distributions."
 
    Based on the issuance of 18,847,500 shares of Common Stock in the  Offering,
the  Company will hold a 86.71%  ownership interest in the Operating Partnership
and the Participants  will hold  a 13.29%  ownership interest  in the  Operating
Partnership. If the Underwriters' overallotment option is exercised in full, the
Company  will hold a 88.24% ownership  interest in the Operating Partnership and
the Participants  will  hold  a  11.76%  ownership  interest  in  the  Operating
Partnership.
 
    The  Company did not obtain  appraisals with respect to  the market value of
any of the assets that the  Company will own immediately after the  consummation
of  the Offering and the Formation Transactions or an opinion as to the fairness
of the  allocation of  shares to  the purchasers  in the  Offering. The  initial
public  offering price of  the Company has been  determined based primarily upon
the estimated Cash  Available for Distribution  of the Company  and the  factors
discussed  under  "Underwriting," rather  than a  property-by-property valuation
based on historical cost, book value  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 a view to values that could be obtained
from a  liquidation of  the Company  or of  individual properties  owned by  the
Company. See "Underwriting."
 
BENEFITS OF THE FORMATION TRANSACTIONS AND THE OFFERING TO AFFILIATES OF THE
COMPANY
 
    Certain  affiliates of the Company will realize certain material benefits in
connection with the Formation Transactions, including the following:
 
    - In  exchange  for  their  respective  ownership  interests  in  the  Arden
      Predecessors  and the assets of Arden,  Messrs. Ziman, Coleman and Gilbert
      and Ms. Byer  will become  beneficial owners of  a total  of 2,740,718  OP
      Units,  with a total value  of $54.8 million based  on the assumed initial
      public offering price of the Common Stock, which value may differ from the
      fair market values  of such interests  and assets and  compares to a  book
      value  of such  interests and assets  of approximately $6.8  million as of
      June 30, 1996. The Company  does not believe that  the book values of  the
      interests  and assets exchanged (which reflects the depreciated historical
      cost of  such interests  and assets)  are equivalent  to the  fair  market
      values  of  such  interests and  assets  based on  the  valuation criteria
      described under "-- Determination and Valuation of Ownership Interests."
 
    - The Participants will realize an  immediate accretion in the net  tangible
      book  value of  their investment  in the  Company of  $12.48 per  share of
      Common Stock representing an aggregate accretion amount of $36.1 million.
 
    - The Participants will  own interests  in the  Operating Partnership  which
      will  be  more liquid  after restrictions  on  transfer expire  than their
      current interests in the Arden Predecessors which own the Properties prior
      to consummation of the Formation Transactions.
 
    - Approximately $398 million of indebtedness  secured by the Properties  and
      indebtedness  outstanding  under  lines of  credit  to be  assumed  by the
      Operating Partnership will be repaid in the Formation Transactions.
 
    - Pursuant to the  Partnership Agreement, certain  Participants who hold  OP
      Units,  including  Messrs.  Ziman,  Coleman, Gilbert  and  Ms.  Byer, will
      receive special allocations of  interest deduction of approximately  $12.6
      million  in the  aggregate relating to  the repayment of  mortgage debt on
      certain of the Properties.
 
    - Messrs. Ziman and  Coleman will  serve as  directors and  officers of  the
      Company  and  the Operating  Partnership  and will  enter  into agreements
      providing for  annual salaries,  bonuses, participation  in the  Company's
      Stock Incentive Plan and other benefits for their services.
 
    - So  long as  he is  Chief Executive Officer,  Mr. Ziman  will have certain
      proportional purchase rights which will enable him to maintain his overall
      percentage ownership, assuming  the exchange  of all OP  Units for  Common
      Stock, of the combined equity of the Company and the Operating Partnership
      in
 
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<PAGE>
      the  event there are  future issuances of Common  Stock or any convertible
      securities by the Company or future issuances of OP Units by the Operating
      Partnership. In each event, Mr.  Ziman's proportional purchase rights  may
      be  exercised at a  price per share  or other trading  unit of such Common
      Stock, convertible securities,  or OP  Units, as the  case may  be, to  be
      received  by the  Company or the  Operating Partnership  in such issuance,
      less any underwriting discounts and commissions, and otherwise on the same
      terms as may be applicable  to such issuance. These proportional  purchase
      rights  will not apply to transactions  under any Company stock plan (such
      as the Stock Incentive Plan), pursuant to an exchange of an OP Unit for  a
      share  of Common Stock or in connection  with any issuance of Common Stock
      or OP  Units  incident  to  an acquisition  of  properties,  assets  or  a
      business.
 
    - Commencing  on the first anniversary  of the Offering certain Participants
      including Messrs.  Ziman,  Coleman and  Gilbert  and Ms.  Byer  will  have
      registration  rights  with respect  to shares  of  Common Stock  issued in
      exchange for OP Units.
 
    See "Risk Factors --  Conflicts of Interests  in the Formation  Transactions
and  the  Business  of  the  Company,"  "Dilution,"  "Partnership  Agreement  --
Redemption/Exchange Rights," "Management" and "Certain Transactions."
 
                  POLICIES WITH RESPECT TO CERTAIN ACTIVITIES
 
    The following is  a discussion  of certain investment,  financing and  other
policies  of the Company.  These policies have been  determined by the Company's
Board of Directors and may be amended or revised from time to time by the  Board
of  Directors without a  vote of the  stockholders, except that  (i) the Company
cannot change its policy of holding its assets and conducting its business  only
through  the Operating Partnership and its affiliates without the consent of the
holders of OP Units as provided  in the Partnership Agreement, and (ii)  changes
in  certain policies  with respect to  conflicts of interest  must be consistent
with legal requirements.
 
INVESTMENT POLICIES
 
    INVESTMENT IN REAL  ESTATE OR INTERESTS  IN REAL ESTATE.   The Company  will
conduct  all of its investment activities  through the Operating Partnership and
its affiliates. The  Company's investment  objectives are  to provide  quarterly
cash  distributions and achieve long-term capital appreciation through increases
in the  value  of the  Company.  For a  discussion  of the  Properties  and  the
Company's   acquisition  and  other  strategic  objectives,  see  "Business  and
Properties" and "Business and Growth Strategies."
 
    The Company expects  to pursue its  investment objectives primarily  through
the  direct ownership by  the Operating Partnership of  the Properties and other
acquired office properties. The Company currently intends to invest primarily in
existing improved properties but  may, if market  conditions warrant, invest  in
development  projects  as well.  Furthermore, the  Company currently  intends to
invest in or develop commercial properties in Southern California, and primarily
in suburban  Los  Angeles  County. However,  future  investment  or  development
activities  will not be limited  to any geographic area or  product type or to a
specified percentage  of the  Company's  assets. While  the Company  intends  to
diversify  in terms of property locations, size and market, the Company does not
have any limit on the amount or percentage of its assets that may be invested in
any one property or any  one geographic area. The  Company intends to engage  in
such future investment or development activities in a manner which is consistent
with the maintenance of its status as a REIT for federal income tax purposes. In
addition,  the  Company may  purchase or  lease income-producing  commercial and
other types of properties for long-term investment, expand and improve the  real
estate  presently owned or other properties  purchased, or sell such real estate
properties, in whole or in part, when circumstances warrant.
 
    The Company may also participate  with third parties in property  ownership,
through  joint ventures  or other  types of  co-ownership. Such  investments may
permit the Company to own interests in larger assets without unduly  restricting
diversification  and, therefore,  add flexibility in  structuring its portfolio.
While the Company currently does not have any plans to invest in joint  ventures
or partnerships with affiliates or
 
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<PAGE>
promoters  of the  Company, Mr.  Gilbert, a  director of  the Company,  owns one
office property in  Southern California  that the  Company may  consider in  the
future. The Company will not, however, enter into a joint venture or partnership
to make an investment that would not otherwise meet its investment policies.
 
    Equity  investments may be subject to  existing mortgage financing and other
indebtedness or such financing or indebtedness as may be incurred in  connection
with  acquiring or refinancing these investments. Debt service on such financing
or indebtedness will have a priority over any distributions with respect to  the
Common  Stock. Investments are  also subject to  the Company's policy  not to be
treated as an investment  company under the Investment  Company Act of 1940,  as
amended (the "1940 Act").
 
    INVESTMENTS IN REAL ESTATE MORTGAGES.  While the Company's current portfolio
consists of, and the Company's business objectives emphasize, equity investments
in  commercial real estate, the  Company may, in the  discretion of the Board of
Directors, invest in mortgages and other  types of equity real estate  interests
consistent  with the  Company's qualification  as a  REIT. The  Company 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  value of  the  property.
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.
 
    SECURITIES  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 REIT qualification, the Company
also  may invest in  securities of other  REITs, other entities  engaged in real
estate activities or securities of other  issuers, including for the purpose  of
exercising control over such entities.
 
DISPOSITIONS
 
    The  Company does not currently intend to  dispose of any of the Properties,
although it reserves  the right to  do so if,  based upon management's  periodic
review  of the Company's portfolio, the  Board of Directors determines that such
action would be in the  best interests of the  Company. The tax consequences  of
the  disposition  of  the Properties  may,  however, influence  the  decision of
certain directors and executive officers of the Company who hold OP Units as  to
the  desirability of a  proposed disposition. See "Risk  Factors -- Conflicts of
Interests in the Formation Transactions and the Business of the Company."
 
    Any decision  to dispose  of a  Property will  be made  by the  Company  and
approved  by  a majority  of  the Board  of  Directors. In  addition,  under the
Partnership Agreement, the consent of a majority of the Limited Partners of  the
Operating  Partnership must approve any sale  of Century Park Center (other than
in connection with the  sale of all  or substantially all of  the assets of  the
Company or a merger of the Company) for a period of seven years from the closing
of the Offering.
 
FINANCING POLICIES
 
    As  a general  policy, the Company  intends to limit  its total consolidated
indebtedness incurred so  that at the  time any debt  is incurred, the  Company'
debt  to total market capitalization ratio  does not exceed 50%. Upon completion
of the  Offering  and the  Formation  Transactions,  the debt  to  total  market
capitalization  ratio of the  Company will be approximately  19.3% (17.6% if the
Underwriters' overallotment option is exercised in full). The Charter and Bylaws
do not, however, limit the amount or percentage of indebtedness that the Company
may incur. In addition, the Company may from time to time modify its debt policy
in light  of 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 total market capitalization  ratio
beyond  the limits described above. If  these policies were changed, the Company
could become more highly leveraged, resulting in an increased risk of default on
its obligations and a related increase  in debt service requirements that  could
adversely  affect  the  financial condition  and  results of  operations  of the
Company and the Company's ability to make distributions to stockholders.
 
    The Company has  established its debt  policy relative to  the total  market
capitalization  of the Company computed at the time the debt is incurred, rather
than  relative  to   the  book   value  of  such   assets,  a   ratio  that   is
 
                                      105
<PAGE>
frequently  employed,  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. Total  market  capitalization,
however,  is  subject  to greater  fluctuation  than  book value,  and  does not
necessarily reflect  the fair  market  value of  the  underlying assets  of  the
Company  at  all  times. Moreover,  due  to  fluctuations in  the  value  of the
Company's portfolio of Properties  over time, and since  any measurement of  the
Company's total consolidated indebtedness to total market capitalization is made
only at the time debt is incurred, the debt to total market capitalization ratio
could exceed the 50% level.
 
    The  Company  has not  established  any limit  on  the number  or  amount of
mortgages that may be  placed on any  single property or on  its portfolio as  a
whole.
 
    Although   the  Company  will  consider  factors  other  than  total  market
capitalization in making decisions regarding the incurrence of debt (such as the
purchase price of properties to be  acquired with debt financing, the  estimated
market  value  of properties  upon refinancing,  and  the ability  of particular
properties and the Company as a whole to generate sufficient cash flow to  cover
expected  debt service), there can be no assurance that the debt to total market
capitalization ratio, or any other measure of asset value, at the time the  debt
is incurred or at any other time will be consistent with any particular level of
distributions  to stockholders.  See "Risk Factors  -- No  Limitations on Debt,"
"Management's Discussion  and Analysis  of Financial  Condition and  Results  of
Operations -- Liquidity and Capital Resources."
 
CONFLICT OF INTEREST POLICIES
 
    The  Company has adopted  certain policies and  entered into agreements with
Messrs. Ziman and Coleman designed to eliminate or minimize potential  conflicts
of  interest. These agreements include non-competition provisions that generally
prohibit Messrs. Ziman and Coleman from engaging in the acquisition, management,
leasing or renovation of  any office properties in  the Los Angeles, Orange  and
San  Diego counties of  Southern California and  from engaging in  any active or
passive investment in  or reasonably  relating to  the acquisition,  renovation,
management  or leasing of any  office properties in the  Los Angeles, Orange and
San Diego counties of Southern California for a period of one year following the
date  of  termination  of  such  executive's  employment.  See  "Management   --
Employment  Agreements." The Company's Board of  Directors is subject to certain
provisions of Maryland law, which are designed to eliminate or minimize  certain
potential  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.
 
    POLICIES APPLICABLE TO  ALL DIRECTORS.   The  Company has  adopted a  policy
that,  without the approval of a majority of the non-employee directors, it will
not (i)  acquire from  or  sell to  any director,  officer  or employee  of  the
Company,  or any entity in which a  director, officer or employee of the Company
beneficially owns  more than  a 1%  interest, or  acquire from  or sell  to  any
affiliate  of any of the  foregoing, any of the assets  or other property of the
Company, (ii) make any loan  to or borrow from any  of the foregoing persons  or
(iii) engage in any other transaction with any of the foregoing persons.
 
   
    Pursuant  to Maryland law, each director  will be subject to restrictions on
misappropriation of corporate opportunities. In addition, under Maryland law,  a
contract  or other transaction between the Company and a Director or between the
Company and any  other corporation  or other  entity in  which a  Director is  a
director  or has a material financial interest is not void or voidable solely on
the grounds  of  such common  directorship  or  interest, the  presence  of  the
Director  at the  meeting at  which the  contract or  transaction is authorized,
approved or ratified or the counting of the Director's vote in favor thereof  if
(a) the transaction or contract is authorized, approved or ratified by the board
of  directors  or a  committee  of the  board,  after disclosure  of  the common
directorship or interest, by the affirmative vote of a majority of disinterested
directors, even if the disinterested directors constitute less than a quorum, or
by a  majority of  the votes  cast  by disinterested  stockholders, or  (b)  the
transaction or contract is fair and reasonable to the Company.
    
 
                                      106
<PAGE>
POLICIES WITH RESPECT TO OTHER ACTIVITIES
 
    The  Company has authority to offer Common Stock, Preferred Stock or options
to purchase  stock in  exchange  for property  and  to repurchase  or  otherwise
acquire its Common Stock or other securities in the open market or otherwise and
may engage in such activities in the future. As described under "The Partnership
Agreement  --  Redemption/Exchange  Rights,"  the Company  expects  (but  is not
obligated) to  issue  Common Stock  to  holders of  OP  Units in  the  Operating
Partnership  upon  exercise  of  their redemption/  exchange  rights.  Except in
connection with the Formation  Transactions, the Company  has not issued  Common
Stock,  OP Units or any  other securities in exchange  for property or any other
purpose, and the  Board of  Directors has no  present intention  of causing  the
Company  to repurchase any  Common Stock. The Company  may issue Preferred Stock
from time  to time,  in  one or  more  series, as  authorized  by the  Board  of
Directors  without  the need  for stockholder  approval.  See "Capital  Stock --
Preferred Stock." 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 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 qualify as  a REIT, unless  because of circumstances or
changes in  the Code  (or  the Treasury  Regulations),  the Board  of  Directors
determines  that it is no longer in the  best interest of the Company to qualify
as a  REIT and  such determination  is  approved by  a two  thirds vote  of  the
Company's  stockholders as required by the Charter. The Company has not made any
loans to  third parties,  although it  may in  the future  make loans  to  third
parties,   including,  without  limitation,  to   joint  ventures  in  which  it
participates. The Company intends to make investments in such a way that it will
not be  treated as  an investment  company  under the  1940 Act.  The  Company's
policies with respect to such activities may be reviewed and modified or amended
from  time to  time by the  Company's Board of  Directors without a  vote of the
stockholders.
 
                              CERTAIN TRANSACTIONS
 
FORMATION TRANSACTIONS
 
    The terms of the acquisitions of interests in the Properties and in Arden by
the Operating  Partnership are  described  in "Structure  and Formation  of  the
Company -- The Formation Transactions."
 
PARTNERSHIP AGREEMENT; REDEMPTION/EXCHANGE RIGHTS
 
    The  Company will enter into the Partnership Agreement with the Participants
receiving OP Units. Among other things, the Partnership Agreement provides  such
holders  of OP Units with the right to cause the Operating Partnership to redeem
OP Units for cash or, at the election of the Company, exchange such OP Units for
shares of  Common Stock  of the  Company  (on a  one-for-one basis).  See  "Risk
Factors -- Conflicts of Interests in the Formation Transactions and the Business
of the Company; Benefits from Formation Transactions," "Policies With Respect to
Certain   Transactions  --  Conflict  of  Interest  Policies"  and  "Partnership
Agreement -- Redemption/Exchange Rights."
 
REGISTRATION RIGHTS
 
    For a description of certain  registration rights held by the  Participants,
see "Shares Available for Future Sale -- Registration Rights."
 
CERTAIN TRANSACTIONS INVOLVING DIRECTOR NOMINEE
 
    Mr.  Jerry Asher, one of the Company's  director nominees, is employed by CB
Commercial which has provided, from time to time, third-party leasing  brokerage
services  to the Company with  respect to certain of  its Properties. As of July
31, 1996, the Company had paid approximately $293,000 in leasing commissions  to
CB  Commercial for  leasing brokerage  services rendered  during 1995  and 1996.
While the Company may engage CB  Commercial in the future to provide  additional
leasing brokerage services, it is not currently under any contractual obligation
to  do so.  Furthermore, Mr.  Asher, as Director  of Business  Development at CB
Commercial, has  no  direct involvement  in  CB Commercial's  leasing  brokerage
services  and does  not have  any personal  interest in  any leasing commissions
received by CB Commercial from the Company.
 
                                      107
<PAGE>
                             PARTNERSHIP AGREEMENT
 
    THE  FOLLOWING  SUMMARY   OF  THE  PARTNERSHIP   AGREEMENT,  INCLUDING   THE
DESCRIPTIONS  OF CERTAIN PROVISIONS  SET FORTH ELSEWHERE  IN THIS PROSPECTUS, IS
QUALIFIED IN ITS ENTIRETY  BY REFERENCE TO THE  PARTNERSHIP AGREEMENT, WHICH  IS
FILED  AS AN EXHIBIT TO THE REGISTRATION STATEMENT OF WHICH THIS PROSPECTUS IS A
PART.
 
MANAGEMENT
 
    The  Operating  Partnership  has  been  organized  as  a  Maryland   limited
partnership  pursuant  to the  terms  of the  Partnership  Agreement. 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,  subject to certain limited exceptions. The limited partners of the
Operating Partnership (the "Limited  Partners") will have  no authority in  such
capacity  to transact business for, or  participate in the management activities
or decisions of, the Operating Partnership. See
"-- Certain Voting Rights of Limited Partners."
 
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 60% of the OP 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  Affiliates (as defined in the  Partnership
Agreement)  who  agree to  assume the  obligations of  the transferor  under the
Partnership Agreement. Messrs. Ziman and Coleman and certain other  Participants
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 ("Termination Transaction"),  unless the  Termination Transaction  has
been approved by holders of at least 66 2/3% of the OP Units (including OP Units
held by the Company which will represent 86.69% of all OP 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  OP
Unit  an amount of cash,  securities, or other property  equal to the product of
the number  of  shares  of  Common  Stock  into  which  each  OP  Unit  is  then
exchangeable  and the greatest amount of cash, securities or other property paid
to the holder  of one share  of Common Stock  in consideration of  one share  of
Common  Stock at any time during the period from and after the date on which the
Termination Transaction is consummated. 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  50% of the  outstanding shares of  Common
Stock,  each holder of OP 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 OP Units  immediately prior to the
expiration of such purchase, tender or exchange offer and had thereupon accepted
such purchase, tender or exchange offer.
    
 
    Notwithstanding the foregoing paragraph, the Company may merge, or otherwise
combine its assets,  with another entity  if, immediately after  such merger  or
other  combination, substantially  all of  the assets  of the  surviving entity,
other than  OP Units  held by  the  Company, are  contributed to  the  Operating
Partnership  as a  capital contribution  in exchange  for OP  Units with  a fair
market value, as reasonably determined by the Company, equal to the agreed value
of the assets so contributed.
 
    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.
 
                                      108
<PAGE>
CAPITAL CONTRIBUTIONS
 
    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, and the  Company borrows such funds from  a
financial  institution or other lender then the  Company will lend such funds to
the Operating Partnership on comparable  terms and conditions as are  applicable
to  the Company's borrowing of such funds. The Company may contribute the amount
of any required funds not loaned  to the Operating Partnership 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
based upon the amount of such additional capital contributions and the value  of
the  Operating Partnership  at the time  of such  contributions. Conversely, the
partnership  interests  of  the  Limited   Partners  will  be  decreased  on   a
proportionate  basis in  the event  of additional  capital contributions  by the
Company. The Company's rights to make loans or additional capital  contributions
to  the  Operating Partnership  are generally  subject to  Mr. Ziman's  right to
receive notice thereof and  to fund the  loan or capital  contribution on a  pro
rata basis so long as Mr. Ziman is the Company's Chief Executive Officer.
 
REDEMPTION/EXCHANGE RIGHTS
 
    Limited  Partners will receive rights which  will enable them to require the
Operating Partnership to redeem part  or all of their  OP 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, at  the election of the Company, exchange  such
OP  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)  from  the
Company, subject to  the Ownership Limit  and certain limitations  on resale  of
shares.  The Company  presently anticipates that  it will elect  to issue Common
Stock in exchange for OP 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
one  year following the consummation of the Offering  or (ii) at any time to the
extent  such  exercise  would  result  in  such  Limited  Partner  actually   or
constructively  owning  common stock  in excess  of  the Common  Stock Ownership
Limit, assuming Common Stock was issued in such exchange.
 
ISSUANCE OF ADDITIONAL OP UNITS, COMMON STOCK OR CONVERTIBLE SECURITIES
 
    As general partner of the Operating Partnership, the Company has the ability
to cause the Operating  Partnership to issue additional  OP Units. In  addition,
the  Company may, from time to time,  issue additional shares of Common Stock or
convertible securities. In each event, Mr. Ziman will have proportional purchase
rights which will enable him to maintain his overall percentage ownership of the
combined equity  of the  Company  and the  Operating Partnership,  assuming  the
exchange  of all  OP Units for  Common Stock. Mr.  Ziman's proportional purchase
rights may be exercised, in his sole  discretion, at a price per share or  other
trading  unit of such OP  Units, Common Stock or  convertible securities, as the
case may be, to be received by the Company or the Operating Partnership in  such
issuance,  less any underwriting discounts and commissions, and otherwise on the
same terms as may be applicable  to such issuances. These proportional  purchase
rights  will not apply to transactions under any Company stock plan (such as the
Stock Incentive Plan),  pursuant to an  exchange of an  OP Unit for  a share  of
Common  Stock or  in connection with  any issuance  of Common Stock  or OP Units
incident to an acquisition of properties, assets or a business.
 
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 special
allocations to certain Limited Partners  of interest deductions and income  from
the
 
                                      109
<PAGE>
discharge   of  indebtedness   attributable  to   loans  transferred   by  Arden
Predecessors to the Operating Partnership and to compliance with the  provisions
of  Sections  704(b) and  704(c)  of the  Code  and the  regulations promulgated
thereunder. See  "Federal  Income  Tax  Considerations --  Tax  Aspects  of  the
Operating Partnership."
 
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 the net  sales and refinancing  proceeds,
will  be distributed from time to time (but at least quarterly) as determined by
the Company pro rata in accordance with the partners' percentage interests.
 
    Pursuant to the  Partnership Agreement, subject  to certain exceptions,  the
Operating  Partnership  will also  assume  and pay  when  due, or  reimburse the
Company for payment of all costs and expenses relating to the operations of  the
Company.
 
DUTIES AND CONFLICTS
 
    The  Partnership  Agreement provides  that  all business  activities  of the
Company, including all activities pertaining to the acquisition and operation of
office properties, must be conducted through the Operating Partnership.
 
CERTAIN VOTING RIGHTS OF LIMITED PARTNERS
 
    So long as the Limited Partners own at least 5% of the outstanding OP units,
the Company shall not, on behalf of  the Operating Partnership, take any of  the
following actions without the prior consent of holders of at least 50% of the OP
Units  representing  limited  partner  interests:  (1)  dissolve  the  Operating
Partnership, other than incident to a merger or sale of substantially all of the
Company's assets;  or  (2) prior  to  the expiration  of  seven years  from  the
completion  of the Offering, sell Century Park  Center, 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  until
December  31, 2096, or until sooner  dissolved upon the bankruptcy, dissolution,
withdrawal or termination of the Company as general partner (unless the  Limited
Partners  other than the  Company elect to  continue the Operating Partnership),
the election of  the Company and  the Limited  Partners, on entry  of decree  of
judicial  dissolution, or the sale or  other disposition of all or substantially
all the assets of the Operating Partnership or redemption of all OP Units.
 
INDEMNIFICATION
 
    To the  extent permitted  by  law, the  Partnership Agreement  provides  for
indemnification  and advance  of expenses  of the  Company and  its officers and
directors to the same extent indemnification and advance of expenses is provided
to officers and directors of the Company  in its Charter and Bylaws, and  limits
the  liability of the  Company and its  officers and directors  to the Operating
Partnership and  its partners  to  the same  extent  liability of  officers  and
directors  of  the Company  is  limited under  the  Charter. See  "Management --
Limitation of Liability and Indemnification."
 
                                      110
<PAGE>
                             PRINCIPAL STOCKHOLDERS
 
   
    The following table sets forth certain information regarding the  beneficial
ownership  of Common Stock (or Common Stock for which OP Units are exchangeable)
by  each  director  and  director  nominee,  by  each  Named  Executive  Officer
identified  on  the  table on  page  97,  by all  directors  (including director
nominees) and officers  of the  Company as  a group and  by each  person who  is
expected  to be the beneficial owner of 5%  or more of the outstanding shares of
Common Stock immediately  following the  completion of the  Offering. Except  as
indicated  below, all of such Common Stock  is owned directly, and the indicated
person has sole voting and investment power.
    
 
<TABLE>
<CAPTION>
                                                                        NUMBER OF SHARES OF
                                                                           COMMON STOCK,
                                                                           ASSUMING FULL
                                                                          EXCHANGE OF OP     PERCENTAGE OF COMMON
NAME AND ADDRESS(1)                                                          UNITS(2)        STOCK OUTSTANDING(2)
- ----------------------------------------------------------------------  -------------------  ---------------------
<S>                                                                     <C>                  <C>
Richard S. Ziman......................................................        1,914,856(3)             7.04%
 
Victor J. Coleman.....................................................        1,308,812(4)             3.86%
 
Diane M. Laing........................................................          --                    --
 
Michele Byer..........................................................           51,032                *
 
Andrew J. Sobel.......................................................            3,750                *
 
Herbert L. Porter.....................................................            1,250                *
 
Arthur Gilbert........................................................          517,319(5)             2.42%
 
Steven C. Good........................................................          --                    --
 
Jerry Asher...........................................................          --                    --
 
Carl D. Covitz........................................................          --                    --
 
Kenneth B. Roath......................................................          --                    --
 
All directors and officers as a group (11 persons)....................        2,708,575               12.56%
</TABLE>
 
- ------------------------------
* Less than one percent.
(1) The address for each of the persons listed is 9100 Wilshire Boulevard,  East
    Tower, Suite 700, Beverly Hills, California 90212.
 
(2)  Except  for Messrs.  Sobel and  Porter,  who hold  shares of  Common Stock,
    beneficial ownership of Common Stock is  currently held 100% in the form  of
    OP Units. In addition, amounts for individuals assume that all OP Units held
    by  the person are exchanged for shares of Common Stock and that none of the
    OP Units held  by other persons  are exchanged for  shares of Common  Stock.
    Amounts  for all directors and  officers as a group  assume all OP Units are
    exchanged for shares of Common Stock. See "Capital Stock -- Restrictions  on
    Transfer."
 
(3)  Includes (a)  855,562 shares  held by entities  in which  Messrs. Ziman and
    Coleman have shared voting and investment  power, of which shares Mr.  Ziman
    disclaims  beneficial ownership in the 40% of such shares in which he has no
    pecuniary interest,  (b)  322,429  shares owned  by  entities  directly  and
    indirectly  owned 100% by  Mr. Ziman, (c)  136,675 shares owned  by a family
    partnership of  Mr.  Ziman,  in  which  Mr.  Ziman  has  shared  voting  and
    investment  power  and of  which  Mr. Ziman  is  a 20%  general  partner and
    disclaims beneficial  ownership of  the remaining  80% in  which he  has  no
    pecuniary  interest,  and (d)  43,200  shares owned  by  an entity  in which
    Messrs. Ziman, Coleman and Gilbert have shared voting and investment  power,
    of  which shares Mr. Ziman disclaims beneficial ownership of the 82% of such
    shares in which he has no pecuniary interest.
 
(4) Includes (a)  855,562 shares  held by entities  in which  Messrs. Ziman  and
    Coleman have shared voting and investment power, of which shares Mr. Coleman
    disclaims  beneficial ownership of the 60% of such shares in which he has no
    pecuniary interest, (b) 84,108 shares owned  by an entity owned 100% by  Mr.
    Coleman  and (c) 43,200  shares owned by  an entity in  which Messrs. Ziman,
    Coleman and Gilbert have shared voting and investment power, of which shares
    Mr. Coleman disclaims  beneficial ownership  of the  88% of  such shares  in
    which he has no pecuniary interest.
 
(5)  Includes  (a) 436,601  shares  owned by  the  Arthur Gilbert  and Rosalinde
    Gilbert 1982 Trust,  of which Mr.  Gilbert is a  trustee, (b) 43,200  shares
    owned  by an entity in which Messrs.  Ziman, Coleman and Gilbert have shared
    voting  and  investment  power,  of  which  shares  Mr.  Gilbert   disclaims
    beneficial  ownership of the 30% of such shares in which he has no pecuniary
    interest and (c) 37,518 shares owned by  an entity in which Mr. Gilbert  and
    the  Gilbert Foundation  (of which Mr.  Gilbert is the  trustee) have shared
    voting and investment power of which shares Mr. Gilbert disclaims beneficial
    ownership of the 99% of such shares in which he has no pecuniary interest.
 
                                      111
<PAGE>
                                 CAPITAL STOCK
 
    THE FOLLOWING SUMMARY  OF THE TERMS  OF THE  STOCK OF THE  COMPANY DOES  NOT
PURPORT  TO  BE COMPLETE  AND IS  SUBJECT TO  AND QUALIFIED  IN ITS  ENTIRETY BY
REFERENCE TO  THE  CHARTER AND  BYLAWS,  COPIES OF  WHICH  ARE EXHIBITS  TO  THE
REGISTRATION  STATEMENT  OF WHICH  THIS PROSPECTUS  IS  A PART.  SEE "ADDITIONAL
INFORMATION."
 
GENERAL
 
    The Charter provides that the Company may issue up to 100,000,000 shares  of
Common  Stock and 20,000,000 shares of preferred stock, $.01 par value per share
("Preferred Stock").  Upon  completion of  the  Offering, 18,852,500  shares  of
Common  Stock will be  issued and outstanding  and no shares  of Preferred Stock
will be issued and outstanding.  Under Maryland law, stockholders generally  are
not  liable for the corporation's obligations solely as a result of their status
as stockholders.
 
COMMON STOCK
 
    All shares of Common Stock offered  hereby will be duly authorized,  validly
issued,  fully paid and nonassessable. Subject to the preferential rights of any
other shares or series of stock and  to the provisions of the Charter  regarding
the  restrictions on transfer  of stock, holders  of shares of  Common Stock are
entitled to  receive dividends  on such  stock if,  as and  when authorized  and
declared  by  the  Board of  Directors  of  the Company  out  of  assets legally
available therefor and  to share ratably  in the assets  of the Company  legally
available  for distribution to its stockholders in the event of its liquidation,
dissolution or winding up after payment  of or adequate provision for all  known
debts and liabilities of the Company.
 
    Subject  to  the provisions  of the  Charter  regarding the  restrictions on
transfer of stock, each outstanding share of Common Stock entitles the holder to
one vote  on all  matters submitted  to a  vote of  stockholders, including  the
election of directors and, except as provided with respect to any other class or
series  of stock, the holders  of such shares will  possess the exclusive voting
power. There is no cumulative voting  in the election of directors, which  means
that  the holders of  a majority of  the outstanding shares  of Common Stock can
elect all of the  directors then standing  for election and  the holders of  the
remaining shares will not be able to elect any directors.
 
    Holders  of shares of Common Stock have no preference, conversion, exchange,
sinking fund, redemption  or appraisal  rights and,  with the  exception of  Mr.
Ziman's proportional purchase rights, have no preemptive rights to subscribe for
any  securities  of  the  Company.  Subject to  the  provisions  of  the Charter
regarding the restrictions  on transfer of  stock, shares of  Common Stock  will
have equal dividend, liquidation and other rights.
 
   
    Under  the MGCL, a 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 votes  entitled  to  be cast  on  the  matter unless  a  greater  or  lesser
percentage  (but not less than a majority of all  of the votes to be cast on the
matter) is set forth  in the corporation's charter.  The Company's Charter  does
not  provide  for  a  lesser  percentage  in  such  situations  except  that the
provisions of  the  Charter relating  to  authorized  shares of  stock  and  the
classification  and  reclassification of  shares of  Common Stock  and Preferred
Stock may be amended by the affirmative vote  of the holders of not less than  a
majority of the votes entitled to be cast on the matter.
    
 
PREFERRED STOCK
 
    The  Charter  authorizes the  Board of  Directors  to classify  any unissued
shares of  Preferred  Stock and  to  reclassify any  previously  classified  but
unissued shares of any series, as authorized by the Board of Directors. Prior to
issuance  of shares of  each series, the Board  is required by  the MGCL and the
Charter of  the  Company  to set,  subject  to  the provisions  of  the  Charter
regarding  the  restrictions  on  transfer  of  stock,  the  terms, preferences,
conversion or  other  rights, voting  powers,  restrictions, limitations  as  to
dividends  or  other distributions,  qualifications and  terms or  conditions of
redemption for each such series. Thus, the Board could authorize the issuance of
shares of Preferred Stock with terms and conditions which could have the  effect
of delaying, deferring or preventing a transaction or a change in control of the
Company that might
 
                                      112
<PAGE>
involve  a premium price  for holders of  Common Stock or  otherwise be in their
best interest.  As  of  the  date  hereof, no  shares  of  Preferred  Stock  are
outstanding and the Company has no present plans to issue any Preferred Stock.
 
POWER TO ISSUE ADDITIONAL SHARES OF COMMON STOCK AND PREFERRED STOCK
 
    The  Company believes  that the  power of  the Board  of Directors  to issue
additional authorized but unissued shares of Common Stock or Preferred Stock and
to classify or reclassify  unissued shares of Common  Stock and Preferred  Stock
and  thereafter to  cause the Company  to issue such  classified or reclassified
shares  of  stock  will  provide  the  Company  with  increased  flexibility  in
structuring  possible future  financings and  acquisitions and  in meeting other
needs which might arise. The additional classes or series, as well as the Common
Stock, will be available  for issuance without further  action by the  Company's
stockholders,  unless such action is required by  applicable law or the rules of
any stock  exchange  or  automated  quotation  system  on  which  the  Company's
securities  may be  listed or  traded. Although  the Board  of Directors  has no
intention at the present  time of doing  so, it could  authorize the Company  to
issue  a class or series  that could, depending upon the  terms of such class or
series, delay, defer  or prevent a  transaction or  a change in  control of  the
Company  that  might involve  a premium  price  for holders  of Common  Stock or
otherwise be in their best interest.
 
TRANSFER AGENT AND REGISTRAR
 
    The transfer agent and  registrar for the  Common Stock is  The Bank of  New
York.
 
RESTRICTIONS ON TRANSFER
 
    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  Charter contains
restrictions on the ownership and transfer of Common Stock which are intended to
assist the Company in  complying with these  requirements. The Charter  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 9.0% (by number or value, whichever is more restrictive)
of  the  outstanding  shares  of  Common  Stock  (the  "Ownership  Limit").  The
constructive  ownership rules of the  Code are complex, and  may cause shares of
Common Stock owned actually or constructively by a group of related  individuals
and/or  entities to be  owned constructively by  one individual or  entity. As a
result, the acquisition of less than 9.0% 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 9.0% of the outstanding Common  Stock and thus subject such shares  to
the  Ownership  Limit. The  Board  of Directors  may, but  in  no event  will be
required to, waive the Ownership Limit with respect to a particular  stockholder
if it determines that such ownership will not jeopardize the Company's status as
a  REIT.  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
Mr.  Ziman and, as a result, has waived  the Ownership Limit with respect to the
Ziman  family  and   certain  affiliated  entities,   including  the   Operating
Partnership.  The Ziman family and such entities will be permitted to own in the
aggregate, actually or  constructively, up  to 13% (by  number of  shares or  by
value, whichever is more restrictive) of the Common Stock.
 
                                      113
<PAGE>
    The Charter further prohibits (a) 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 (b)  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 and  such determination  is  approved by  a two  thirds vote  of  the
Company's stockholders as required by the Charter.
 
    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  the
Charter, 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 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 shares in excess of the Ownership Limit (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 (as
defined in the Charter) 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,  and  distribute  to  the
Prohibited  Transferee an amount  equal to the  lesser of the  price paid by the
Prohibited Transferee 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 sole discretion)  (i) to rescind  as void any  vote
cast  by a Prohibited Transferee 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, then the
Charter provides 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 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
 
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stock  held in the Trust. Upon  such a sale to the  Company, the interest of the
Charitable Beneficiary in the shares sold shall terminate and the Trustee  shall
distribute the net proceeds of the sale to the Prohibited Owner.
 
    All  certificates representing  shares of  Common Stock  will bear  a legend
referring to the restrictions described above.
 
    Under the Charter, 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.
 
    These ownership limits  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.
 
    CERTAIN PROVISIONS OF MARYLAND LAW AND THE COMPANY'S CHARTER AND BYLAWS
 
    THE FOLLOWING  SUMMARY OF  CERTAIN PROVISIONS  OF MARYLAND  LAW AND  OF  THE
CHARTER AND BYLAWS OF THE COMPANY DOES NOT PURPORT TO BE COMPLETE AND IS SUBJECT
TO  AND QUALIFIED IN ITS  ENTIRETY BY REFERENCE TO  MARYLAND LAW AND THE CHARTER
AND BYLAWS OF  THE COMPANY,  COPIES OF WHICH  ARE EXHIBITS  TO THE  REGISTRATION
STATEMENT OF WHICH THIS PROSPECTUS IS A PART.
 
    The  Charter and the  Bylaws of the Company  contain certain provisions that
could make more difficult the  acquisition of the Company  by means of a  tender
offer, a proxy contest or otherwise. These provisions are expected to discourage
certain types of coercive takeover practices and inadequate takeover bids and to
encourage  persons seeking to acquire control  of the Company to negotiate first
with the Board  of Directors. The  Company believes that  the benefits of  these
provisions  outweigh the potential disadvantages  of discouraging such proposals
because, among other things,  negotiation of such proposals  might result in  an
improvement  of their terms.  The description set  forth below is  intended as a
summary only and is qualified  in its entirety by  reference to the Charter  and
the  Bylaws, which have been filed as  exhibits to the Registration Statement of
which this Prospectus  is a  part. See also  "Capital Stock  -- Restrictions  on
Transfer."
 
BOARD OF DIRECTORS - NUMBER, CLASSIFICATION, VACANCIES
 
    The  Bylaws  provide that  the number  of  directors of  the Company  may be
established by the Board of  Directors but may not be  fewer than five nor  more
than  11. 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,
except that a vacancy resulting from an increase in the number of directors must
be filled by a majority of the entire Board of Directors.
 
    The Company's Board of Directors is divided into three classes of directors.
The  initial terms of the  first, second and third  classes will expire in 1997,
1998 and 1999, respectively. Beginning in 1997, directors of each class will  be
chosen  for three-year terms upon the expiration of their current terms and each
year one class of directors will  be elected by the stockholders. The  staggered
terms of directors may reduce the possibility of a tender offer or an attempt to
change  control of the Company  even though a tender  offer or change in control
might be in the best interest of the stockholders.
 
    The  classified  board  provision  could  have  the  effect  of  making  the
replacement  of incumbent directors more time  consuming and difficult. 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.  The  staggered  terms  of  directors  may  reduce  the
possibility  of a tender offer  or an attempt to  change control of the Company,
even though a tender offer or change in control might be in the best interest of
the stockholders.
 
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<PAGE>
REMOVAL OF DIRECTORS
 
    The Charter provides that subject  to the rights of  one or more classes  or
series  of Preferred Stock to  elect one or more  directors, any director may be
removed only for cause (as defined in  the Charter) 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  the existence  of
cause  for removal and 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  a  Maryland
corporation and any  person who  beneficially owns ten  percent or  more of  the
voting power of the corporation's shares or an affiliate of the corporation who,
at  any time within the  two-year period prior to the  date in question, was the
beneficial  owner  of  ten  percent  or   more  of  the  voting  power  of   the
then-outstanding  voting stock of the  corporation (an "Interested Stockholder")
or an affiliate of such an Interested Stockholder are prohibited for five  years
after  the  most recent  date  on which  the  Interested Stockholder  becomes an
Interested Stockholder.  Thereafter,  any  such  business  combination  must  be
recommended  by the board of  directors of such corporation  and approved by the
affirmative vote of at least (a) 80% of the votes entitled to be cast by holders
of outstanding shares of voting stock  of the corporation and (b) two-thirds  of
the  votes entitled  to be cast  by holders  of voting stock  of the corporation
other than shares held  by the Interested Stockholder  with whom (or with  whose
affiliate)  the  business combination  is to  be  effected, unless,  among other
conditions, the corporation's  common stockholders receive  a minimum price  (as
defined  in the MGCL) for their shares 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 Maryland  law do  not apply,  however, to business
combinations that are  approved or  exempted by the  board of  directors of  the
corporation  prior  to  the  time that  the  Interested  Stockholder  becomes an
Interested Stockholder. The Company's Board of Directors has resolved to opt out
of the business  combination provisions of  the MGCL and  such resolutions  also
require  that any decision to opt back in  be subject to the approval of holders
of a majority of the shares of Common Stock.
    
 
CONTROL SHARE ACQUISITIONS
 
    The MGCL provides that "control  shares" of a Maryland corporation  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 of stock owned by the acquiror, by officers or by directors who
are employees of the  corporation. "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 virtue of  a 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
or  more of all voting power. Control shares do not include shares the acquiring
person is then  entitled to  vote as the  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 of  the corporation to call a special  meeting
of  stockholders to  be held  within 50  days of  demand to  consider the voting
rights of the shares. If no request  for a meeting is made, the corporation  may
itself present the question at any stockholders meeting.
 
    If  voting rights are not approved at the meeting or if the acquiring person
does not deliver an acquiring person statement as required by the statute, then,
subject to certain conditions and limitations, the corporation 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
 
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<PAGE>
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 entitled to vote, all  other stockholders may exercise appraisal  rights.
The fair value of the shares 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.
 
    The control share acquisition statute does not apply (a) to shares  acquired
in  a merger, consolidation or  share exchange if the  corporation is a party to
the transaction or (b)  to acquisitions approved or  exempted by the charter  or
bylaws of the corporation.
 
   
    The  Bylaws of  the Company contain  a provision exempting  from the control
share acquisition  statute  any  and  all acquisitions  by  any  person  of  the
Company's  shares  of  stock.  Although  there can  be  no  assurance  that such
provision will not  be amended  or eliminated  at any  time in  the future,  the
Company's  Board of Directors has resolved that the provision may not be amended
or eliminated without  the approval of  holders of  at least a  majority of  the
shares of Common Stock.
    
 
AMENDMENT TO THE CHARTER
 
   
    The  Charter, including  its provisions  on classification  of the  Board of
Directors, restrictions on transferability of shares of Common Stock and removal
of directors, may be amended only by the affirmative vote of the holders of  not
less  than two thirds  of all of  the votes entitled  to be cast  on the matter.
However, the provisions of  the Charter relating to  authorized shares of  stock
and  the  classification  and reclassification  of  shares of  Common  Stock and
Preferred Stock may be  amended by the  affirmative vote of  the holders of  not
less than a majority of the votes entitled to be cast on the matter.
    
 
DISSOLUTION OF THE COMPANY
 
    The  dissolution of the Company must be  approved by the affirmative vote of
the holders of not less than two thirds of all of the votes entitled to be  cast
on the matter.
 
ADVANCE NOTICE OF DIRECTOR NOMINATIONS AND NEW BUSINESS
 
    The Bylaws of the Company provide that (a) 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
(i)  pursuant  to the  Company's notice  of the  meeting, (ii)  by the  Board of
Directors or (iii) 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 (b)
with respect  to  special  meetings  of  the  stockholders,  only  the  business
specified  in the Company's notice of meeting  may be brought before the meeting
of stockholders  and  nominations  of  persons for  election  to  the  Board  of
Directors  may be made only (i) pursuant to the Company's notice of the meeting,
(ii) by the Board of Directors or (iii) 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.
 
ANTI-TAKEOVER EFFECT OF CERTAIN PROVISIONS OF MARYLAND LAW AND OF THE CHARTER
AND BYLAWS
 
    The  business  combination  provisions  and  the  control  share acquisition
provisions of the  MGCL, in  each case  if they  ever became  applicable to  the
Company,  the  provisions  of the  Charter  on  classification of  the  Board of
Directors and removal  of directors  and the  advance notice  provisions of  the
Bylaws could delay, defer or prevent a transaction or a change in control of the
Company  that  might involve  a premium  price  for holders  of Common  Stock or
otherwise be in their best interest.
 
RIGHTS TO PURCHASE SECURITIES AND OTHER PROPERTY
 
    The Charter authorizes  the Board of  Directors to create  and issue  rights
entitling  the holders thereof to  purchase from the Company  shares of stock or
other securities  or property.  The times  at which  and terms  upon which  such
rights  are to be issued  would be determined by the  Board of Directors and set
forth in the contracts or instruments that evidence such rights. This  provision
is intended to confirm the Board of Directors' authority to issue share purchase
rights,  which may have terms that could  impede a merger, tender offer or other
takeover attempt,  or other  rights  to purchase  shares  or securities  of  the
Company or any other corporation.
 
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<PAGE>
                        SHARES AVAILABLE FOR FUTURE SALE
 
GENERAL
 
    Upon  the  completion of  the Offering,  the  Company will  have outstanding
18,852,500 shares  of  Common  Stock (21,679,500  shares  if  the  Underwriters'
overallotment  option is  exercised in full).  In addition,  2,889,071 shares of
Common Stock are reserved for issuance upon exchange of OP Units. The shares  of
Common  Stock issued in the  Offering will be freely  tradeable by persons other
than "affiliates" of the Company  without restriction under the Securities  Act,
subject  to the limitations on ownership set  forth in the Charter. See "Capital
Stock -- Restrictions  on Transfer."  The shares of  Common Stock  owned by  the
Participants  or  acquired by  any Participant  in redemption  of OP  Units (the
"Restricted Shares") will be "restricted"  securities under the meaning of  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.  As
described  below under "-- Registration Rights," the Company has granted certain
holders registration rights with respect to their shares of Common Stock.
 
    In general, under Rule 144 as currently in effect, if two years have elapsed
since the later of the date of acquisition of Restricted Shares from the Company
or any "affiliate" of the Company, as that term is defined under the  Securities
Act,  the acquiror or subsequent  holder thereof is entitled  to sell within any
three-month period a number of shares that does not exceed the greater of 1%  of
the then outstanding shares of Common Stock or the average weekly trading volume
of  the Common Stock during the four  calendar weeks preceding the date on which
notice of the sale is filed with the SEC. Sales under Rule 144 are also  subject
to  certain manner of sales provisions, notice requirements and the availability
of current public  information about the  Company. If three  years have  elapsed
since  the date of acquisition of Restricted Shares from the Company or from any
"affiliate" of the  Company, and the  acquiror or subsequent  holder thereof  is
deemed  not to have been an  affiliate of the Company at  any time during the 90
days preceding a sale, such person is entitled to sell such shares in the public
market under Rule  144(k) without regard  to the volume  limitations, manner  of
sale provisions, public information requirements or notice requirements.
 
    The Commission has proposed to amend the holding period required by Rule 144
to  permit sales of "restricted securities" after one year rather than two years
(and two years rather than three  years for "non-affiliates" who desire to  sell
such  shares under  Rule 144(k)). If  such proposed amendment  were enacted, the
"restricted securities" would become freely tradeable (subject to any applicable
contractual restrictions) at these earlier dates.
 
    In connection with the Offering, Messrs.  Ziman and Coleman have agreed  not
to  sell any shares of  Common Stock acquired by them  upon exchange of OP Units
for a period  of two  years after  the completion  of the  Offering without  the
consent  of Lehman Brothers Inc. Such restriction will not apply to any OP Units
or other shares of Common Stock purchased or otherwise acquired by Messrs. Ziman
or Coleman following consummation of the Offering. See "Underwriting."
 
    The Company has  established the  Stock Incentive  Plan for  the purpose  of
attracting  and retaining directors, executive officers and other key employees.
See "Management -- Stock Incentive Plan" and "-- Compensation of Directors." The
Company intends to  issue options  to purchase approximately  868,500 shares  of
Common Stock to directors, executive officers and certain key employees prior to
the  completion of the  Offering and has reserved  631,500 additional shares for
future issuance under the Stock Incentive  Plan. Prior to the expiration of  the
initial  12-month  period following  consummation of  the Offering,  the Company
expects to file a registration statement on  Form S-8 with the SEC with  respect
to  the shares of  Common Stock issuable  under the Stock  Incentive Plan, which
shares may be resold without restriction, unless held by affiliates.
 
    Prior to the Offering, there has been no public market for the Common Stock.
Trading of  the Common  Stock on  the New  York Stock  Exchange is  expected  to
commence immediately following the completion of the Offering. 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 prevailing
from time  to time.  Sales of  substantial amounts  of Common  Stock  (including
shares   issued  upon  the   exercise  of  Options),   or  the  perception  that
 
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<PAGE>
such sales occur, could adversely affect prevailing market prices of the  Common
Stock.  See "Risk Factors -- Absence of  Prior Public Market for Common Stock --
Effect  on  Common  Stock  Price  of  Shares  Available  for  Future  Sale"  and
"Partnership Agreement -- Transferability of Interests."
 
REGISTRATION RIGHTS
 
    The  Company  has granted  the  Participants who  received  OP Units  in the
Formation Transactions certain registration rights with respect to the shares of
Common Stock owned by them or acquired  by them in connection with the  exercise
of  the  Redemption/Exchange  Rights  under  the  Partnership  Agreement.  These
registration rights require the  Company to register all  such shares of  Common
Stock  effective on the  first anniversary of the  consummation of the Offering.
The Company will bear expenses  incident to its registration requirements  under
the  registration  rights,  except  that such  expenses  shall  not  include any
underwriting discounts or  commissions or  transfer taxes, if  any, relating  to
such shares.
 
                        FEDERAL INCOME TAX CONSEQUENCES
 
    The  following summary of material federal income tax consequences 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. 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 tax laws, including without limitation insurance companies,  financial
institutions  or broker-dealers, tax-exempt organizations  (except to the extent
discussed under the  heading "Taxation of  Tax-Exempt Stockholders") or  foreign
corporations  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 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.
 
    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 upon certain  representations
made  by the  Company as  to factual  matters relating  to the  organization and
operation of  the  Company and  the  Operating Partnership.  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.
 
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<PAGE>
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."
 
    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" 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 Internal Revenue Service ("IRS")  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.
 
    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).
 
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    The Company believes that  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  Charter
provides  for restrictions regarding the transfer and ownership of shares, which
restrictions are intended  to assist the  Company in continuing  to satisfy  the
share ownership requirements described in (v) and (vi) above. Such ownership and
transfer  restrictions  are  described  in  "Capital  Stock  --  Restrictions on
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  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,  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
 
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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 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 Company  expects to  receive fees  in exchange  for the  performance  of
certain  management activities for  third parties with  respect to properties in
which  the  Company  does  not  own  an  interest.  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 in  any
taxable  year, including such  fees, 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  will not qualify as  a REIT. As discussed above  in "-- Taxation of the
Company --  General," even  if these  relief provisions  apply, a  tax would  be
imposed  with respect to the excess  net income. No similar mitigation provision
provides relief if  the Company fails  the 30%  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.
 
    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  an interest 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) debt offering of the Company,
cash, cash items  and government securities.  Second, not more  than 25% of  the
Company's total assets may be represented by
 
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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.
 
    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 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 the  Company's net capital  gain) and  (b) 95% of  the net  income
(after  tax), if any, from  foreclosure property, minus (ii)  the sum of certain
items of noncash income.  In addition, if the  Company disposes of any  Built-In
Gain Asset during its 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. 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 or to pay
dividends in the form of taxable stock dividends.
 
    Under certain circumstances, the Company may be able to rectify a failure to
meet the distribution requirement for a year by paying "deficiency dividends" to
stockholders  in a later year, which may  be included in the Company's deduction
for dividends paid for the earlier year. Thus, the Company may be able to  avoid
being taxed on amounts distributed as deficiency dividends; however, the Company
will  be required to pay  interest based upon the  amount of any deduction taken
for deficiency dividends.
 
    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.
 
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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 significantly 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.
 
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  in the case of 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 capital gains (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
 
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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 distributions 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 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  stockholder
(except certain tax-exempt stockholders 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 stockholder. Similarly, income
from  the sale of Common  Stock will not constitute  UBTI unless such tax-exempt
stockholder 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  stockholders  that  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, the Omnibus Budget Reconciliation Act of
1993  (the "1993 Act")  provides that, effective for  taxable years beginning in
1994, 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 (added by  the 1993 Act)
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"
 
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exception with respect to qualified trusts.  As a result of certain  limitations
on  transfer and ownership of Common Stock contained in the Charter, 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  may  be relevant  to a  Non-U.S.  Stockholder in  light of  its particular
circumstances. 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  by the IRS 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
 
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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 taxed  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,
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.
 
    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  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," whether 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"  will depend on whether the  shares are "regularly traded" (as defined
by applicable Treasury Regulations) on  an established securities market  (E.G.,
the  New  York  Stock  Exchange)  and  on  the  size  of  the  selling  Non-U.S.
Stockholder's interest in the Company. 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 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
 
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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.
 
    The  United  States  Treasury  has  recently  issued  proposed   regulations
regarding  the withholding and  information reporting rules  discussed above. In
general, the proposed 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 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 were 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  "-- 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, 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. 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
 
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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 (1)  the entity had  a reasonable  basis for  its
claimed  classification, (2) the entity claimed  that same classification in all
prior years,  and  (3)  as  of  the date  that  the  proposed  regulations  were
published,  neither the entity nor any member of the entity had been notified in
writing that the classification of the entity is under examination by the IRS.
 
    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  Arden   Predecessors,   will   be  allocated
disproportionately to  the Limited  Partners. 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  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 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
 
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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  selected a method 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)
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.
 
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.
 
                              ERISA CONSIDERATIONS
 
    THE FOLLOWING IS A  SUMMARY OF MATERIAL  CONSIDERATIONS ARISING UNDER  ERISA
AND  THE PROHIBITED TRANSACTIONS 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  AND THE  OPERATING PARTNERSHIP  UNDER
ERISA,"  TO A PROSPECTIVE PURCHASER THAT IS NOT AN EMPLOYEE BENEFIT PLAN SUBJECT
TO ERISA, ANOTHER TAX-QUALIFIED PENSION, PROFIT SHARING OR STOCK BONUS PLAN,  OR
AN  INDIVIDUAL RETIREMENT ACCOUNT  OR ANNUITY ("IRA")).  THE DISCUSSION DOES NOT
PURPORT TO DEAL WITH ALL ASPECTS OF ERISA  OR SECTION 4975 OF THE CODE THAT  MAY
BE  RELEVANT TO  PARTICULAR PROSPECTIVE  PURCHASERS (INCLUDING  EMPLOYEE BENEFIT
PLANS SUBJECT  TO  ERISA,  OTHER  TAX-QUALIFIED  PLANS  AND  IRAS)  OR  MATERIAL
CONSIDERATIONS  RELATING TO PROSPECTIVE PURCHASERS  THAT ARE GOVERNMENTAL PLANS,
CHURCH PLANS  OR OTHER  EMPLOYEE BENEFIT  PLANS THAT  ARE EXEMPT  FROM ERISA  OR
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 THE COMMON STOCK  ON
BEHALF  OF A  PROSPECTIVE PURCHASER  WHICH IS  AN EMPLOYEE  BENEFIT PLAN SUBJECT
 
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TO ERISA, A TAX-QUALIFIED PENSION, PROFIT SHARING OR STOCK BONUS PLAN, AN IRA, A
CHURCH PLAN OR A GOVERNMENTAL PLAN IS  ADVISED TO CONSULT ITS OWN LEGAL  ADVISOR
REGARDING  THE SPECIFIC CONSIDERATIONS ARISING UNDER  ERISA, SECTION 4975 OF THE
CODE, AND STATE LAW WITH RESPECT TO  THE PURCHASE, OWNERSHIP, OR SALE OF  SHARES
OF THE COMMON STOCK BY SUCH PLAN OR IRA.
 
EMPLOYMENT BENEFIT PLANS, TAX-QUALIFIED PENSION, PROFIT SHARING OR STOCK BONUS
PLANS AND IRAS
 
    Each  fiduciary  of an  employee benefit  plan subject  to ERISA  (an "ERISA
Plan") should carefully consider  whether an investment in  the Common Stock  is
consistent  with its fiduciary responsibilities  under ERISA. In particular, the
fiduciary requirements of Part  4 of Title  I of ERISA  require an ERISA  Plan's
investments  to be  (i) prudent  and in  the interests  of the  participants and
beneficiaries of the ERISA Plan, (ii) diversified in order to minimize the  risk
of  large losses, unless it is clearly prudent not to do so and (iii) authorized
under the terms of  the governing documents  of the ERISA  Plan. In addition,  a
fiduciary of an ERISA Plan should not cause or permit to enter into transactions
prohibited  under  Section  406  of  ERISA  or  Section  4975  of  the  Code. In
determining whether an investment in the 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  investment portfolio  for which  the
fiduciary  has 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
investment  portfolio. A fiduciary  should also take into  account the nature of
the Company's business, the length of the Company's operating history, the terms
of the Management Agreements,  the fact that  certain investment properties  may
not  have been identified yet, other  matters described under "Risk Factors" and
the possibility of UBTI. See "Federal  Income Tax Considerations -- Taxation  of
Stockholders."
 
    The  fiduciary  of an  ERISA Plan,  an  IRA or  a qualified  pension, profit
sharing or stock bonus plan not subject to ERISA (a "Non-ERISA Plan") should  be
subject  to Section  4975 of  the Code  ("Other Plans")  should ensure  that the
purchase of Common  Stock will  not constitute a  prohibited transactions  under
ERISA or the Code.
 
STATUS OF THE COMPANY AND THE OPERATING PARTNERSHIP UNDER ERISA
 
    THE FOLLOWING SECTION DISCUSSES CERTAIN PRINCIPLES THAT APPLY IN DETERMINING
WHETHER  THE  FIDUCIARY REQUIREMENTS  OF  ERISA AND  THE  PROHIBITED TRANSACTION
PROVISIONS OF  ERISA  AND THE  CODE  APPLY TO  AN  ENTITY BECAUSE  ONE  OR  MORE
INVESTORS  IN THE ENTITY'S EQUITY  INTERESTS IS AN ERISA  PLAN OR OTHER PLAN. AN
ERISA PLAN FIDUCIARY SHOULD ALSO CONSIDER  THE RELEVANCE OF THESE PRINCIPLES  TO
ERISA'S PROHIBITION ON IMPROPER DELEGATION OF CONTROL OVER OR RESPONSIBILITY FOR
"PLAN  ASSETS" AND ERISA'S  IMPOSITION OF CO-FIDUCIARY  LIABILITY ON A FIDUCIARY
WHO PARTICIPATES IN, PERMITS (BY ACTION OR INACTION) THE OCCURRENCE OF, OR FAILS
TO REMEDY A KNOWN BREACH BY ANOTHER FIDUCIARY.
 
    If the assets of  the Company are deemed  to be assets of  an ERISA Plan  or
Other  Plan ("plan assets"), (i) the  prudence standards and other provisions of
Part 4 of Title I  of ERISA and the  prohibited transaction provisions of  ERISA
and  the Code  would be applicable  to any transactions  involving the Company's
assets and (ii) persons who exercise any authority or control over the Company's
assets, or who provide investment advice to the Company, would be (for  purposes
of  ERISA and the Code) fiduciaries of  ERISA Plans and Other Plans that acquire
Common  Stock.  The  Department  of   Labor  (the  "DOL"),  which  has   certain
administrative  responsibility over  ERISA Plans and  Other Plans,  has issued a
regulation defining plan assets for certain purposes (the "DOL Regulation"). The
DOL Regulation generally provides that when an ERISA Plan or Other Plan acquires
a security that is an equity interest in an entity and that security is  neither
a  "publicly-offered security"  nor a security  issued by  an investment company
registered under  the 1940  Act, the  assets of  the ERISA  Plan or  Other  Plan
include  both  the equity  interest and  an  undivided interest  in each  of the
underlying assets of the entity, unless it is established either that the entity
is an "operating  company" (as  defined in the  DOL Regulation)  or that  equity
participation in the entity by "benefit plan investors" is not "significant."
 
    The  DOL Regulation defines a "publicly-offered security" as a security that
is "widely held," "freely transferable" and either part of a class of securities
registered under the Exchange Act, or sold pursuant to an effective registration
statement under the Securities Act (provided the securities are registered under
the
 
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Exchange Act within 120 days,  or such later time as  may be allowed by the  SEC
(the  "registration period"),  after the  end of the  fiscal year  of the issuer
during which  the offering  occurred). The  Common  Stock is  being sold  in  an
offering registered under the Securities Act and the Company intends to register
the Common Stock under the Exchange Act within the registration period.
 
    The  DOL Regulation provides that a security  is "widely-held" only if it is
part of a class of securities that is owned by 100 or more investors independent
of the issuer and of one another. A  security will not fail to be "widely  held"
because  the number of  independent investors falls below  100 subsequent to the
initial public offering as a result  of events beyond the issuer's control.  The
Company  expects the  Common Stock  to be "widely  held" upon  completion of the
Offering.
 
    The DOL Regulation provides that whether a security is "freely transferable"
is a factual question to  be determined on the basis  of all relevant facts  and
circumstances. The DOL Regulation further provides that where a security is part
of  an offering  in which  the minimum  investment is  $10,000 or  less, certain
restrictions ordinarily will not, alone or in combination, affect a finding that
such securities  are  "freely transferable."  The  Offering will  not  impose  a
minimum  investment requirement. The restrictions  on transfer enumerated in the
DOL Regulation as  ordinarily not affecting  a finding that  the securities  are
"freely transferable" include: (i) any restriction on or prohibition against any
transfer or assignment that would result in a termination or reclassification of
the  Company for federal or state tax  purposes, or that would otherwise violate
any state  or federal  law or  court order,  (ii) any  requirement that  advance
notice  of  a  transfer  or  assignment  be  given  to  the  Company,  (iii) any
requirement  that  either  the  transferor  or  transferee,  or  both,   execute
documentation   setting  forth   representations  as  to   compliance  with  any
restrictions on transfer that are among  those enumerated in the DOL  Regulation
as  not affecting free  transferability, (iv) any  administrative procedure that
establishes an effective date, or an event (such as completion of the  Offering)
prior  to  which  a  transfer  or assignment  will  not  be  effective,  (v) any
prohibition against  transfer  or  assignment to  an  ineligible  or  unsuitable
investor,  and (vi) any limitation or restriction on transfer or assignment that
is not imposed by  the issuer or a  person acting on behalf  of the issuer.  The
Company believes that the restrictions imposed under the Charter on the transfer
of  Common Stock are of the type of restrictions on transfer generally permitted
under the DOL Regulation or are not otherwise material and should not result  in
the  failure of the Common Stock to  be "freely transferable" within the meaning
of the DOL  Regulation. See  "Capital Stock  -- Restrictions  on Transfer."  The
Company also believes that certain restrictions on transfer that derive from the
securities   laws,  from  contractual  arrangements  with  the  Underwriters  in
connection with the Offering  and from certain provisions  should not result  in
the  failure of the Common Stock to be "freely transferable." See "Underwriting"
and "Certain Provisions of Maryland Law  and the Company's Charter and  Bylaws."
Furthermore,  the  Company is  not  aware of  any  other facts  or circumstances
limiting the transferability  of the Common  Stock that are  not included  among
those  enumerated  as not  affecting their  free  transferability under  the DOL
Regulation, and the  Company does  not expect  to impose  in the  future (or  to
permit any person to impose on its behalf) any other limitations or restrictions
on  transfer that would  not be among the  enumerated permissible limitations or
restrictions.
 
    Assuming that the Company registers the Common Stock under the Exchange  Act
within  the registration period, the Common Stock will be "widely held" and that
no facts  and  circumstances other  than  those  referred to  in  the  preceding
paragraph  exist that restrict transferability of  the Common Stock, the Company
believes  that,  under  the   DOL  Regulation,  the   Common  Stock  should   be
"publicly-offered  securities" and,  therefore, that  the assets  of the Company
should not be  deemed to be  plan assets of  any ERISA Plan  or Other Plan  that
invests in the Common Stock.
 
    The  DOL Regulation will also apply in determining whether the assets of the
Operating Partnership  will  be  deemed  to  be  plan  assets.  The  partnership
interests  in the Operating Partnership will not be publicly offered securities.
Nevertheless, if the Common Stock  constitutes publicly offered securities,  the
Company  believes that the  indirect investment in  the Operating Partnership by
ERISA Plans or Other Plans through their ownership of the Common Stock will  not
cause the assets of the Operating Partnership to be treated as plan assets.
 
                                      132
<PAGE>
                                  UNDERWRITING
 
    The  underwriters  of the  Offering  (the "Underwriters"),  for  whom Lehman
Brothers Inc., Alex. Brown & Sons Incorporated, Dean Witter Reynolds Inc.,  A.G.
Edwards  & Sons,  Inc., Smith Barney  Inc., EVEREN Securities,  Inc., Legg Mason
Wood Walker, Incorporated  and Raymond James  & Associates, Inc.  are acting  as
representatives  (the "Representatives"), have severally  agreed, subject to the
conditions contained in the Underwriting Agreement  (the form of which is  filed
as  an exhibit to  the Registration Statement  of which this  Prospectus forms a
part), to purchase from the Company and  the Company has agreed to sell to  each
Underwriter,  the aggregate number of shares  of Common Stock set forth opposite
the name of each such Underwriter.
 
<TABLE>
<CAPTION>
                                                                                   NUMBER OF
UNDERWRITER                                                                          SHARES
- --------------------------------------------------------------------------------  ------------
<S>                                                                               <C>
Lehman Brothers Inc.............................................................
Alex. Brown & Sons Incorporated.................................................
Dean Witter Reynolds Inc........................................................
A.G. Edwards & Sons, Inc........................................................
Smith Barney Inc................................................................
EVEREN Securities, Inc..........................................................
Legg Mason Wood Walker, Incorporated............................................
Raymond James & Associates, Inc.................................................
                                                                                  ------------
  Total.........................................................................    18,847,500
                                                                                  ------------
                                                                                  ------------
</TABLE>
 
    The Underwriting  Agreement provides  that the  obligations of  the  several
Underwriters  to  purchase  shares  of  Common  Stock  are  subject  to  certain
conditions, and that if any of the  shares of Common Stock are purchased by  the
Underwriters pursuant to the Underwriting Agreement, all of the shares agreed to
be  purchased by  the Underwriters under  the Underwriting Agreement  must be so
purchased.
 
    The Company has been advised that  the Underwriters propose to offer  shares
of  Common Stock directly to  the public initially at  the public offering price
set forth on the cover page of this Prospectus, and to certain selected  dealers
who  may include the Underwriters  at such public offering  price less a selling
concession not in excess of $      per share. The selected dealers may reallow a
concession not in excess  of $        per share to  certain brokers or  dealers.
After  the  Offering,  the public  offering  price, the  concession  to selected
dealers, and the reallowance may be changed by the Representatives.
 
    The Company  has  agreed  to  indemnify  the  Underwriters  against  certain
liabilities, including liabilities under the Securities Act, or to contribute to
the payments they may be required to make in respect thereto.
 
    The  Company has granted to the Underwriters  an option to purchase up to an
additional 2,827,000 shares of Common Stock, at the public offering price,  less
the aggregate underwriting discounts and commissions, shown on the cover page of
this  Prospectus, solely  to cover  overallotments, if  any. Such  option may be
exercised at  any  time  within 30  days  after  the date  of  the  Underwriting
Agreement. To the extent that such option is exercised, each Underwriter will be
committed, subject to certain conditions, to purchase a number of the additional
shares of Common Stock proportionate to such Underwriter's initial commitment as
indicated in the preceding table.
 
    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  negotiations,  in  addition  to  prevailing  market  conditions,  are
distribution rates and financial characteristics  of publicly traded REITs  that
the Company and the Representatives believe to be comparable to the Company, the
expected results of operations of the Company (which are based on the results of
operations of the Properties and the fee management business in recent periods),
estimates  of future business potential and earnings prospects of the Company as
a whole and the current state of the real estate market in the Company's primary
markets and the economy as a whole. The initial
 
                                      133
<PAGE>
price per share to  the public set  forth on the cover  page of this  Prospectus
should  not, however,  be considered  an indication of  the actual  value of the
Common Stock. Such price is subject to  change as a result of market  conditions
and other factors.
 
    The  Underwriters do  not intend  to confirm  sales of  Common Stock  to any
account over which they exercise discretionary authority.
 
    After giving effect to Mortgage Financing, Lehman Brothers Holdings Inc., an
affiliate of Lehman Brothers  Inc., will receive  approximately $202 million  of
the  net proceeds  from the  Offering as  repayment of  indebtedness and related
interest expected to be outstanding upon consummation of the Offering. See  "Use
of Proceeds."
 
    In  connection with the Offering, Messrs.  Ziman and Coleman have agreed not
to sell any shares of  Common Stock acquired by them  upon exchange of OP  Units
for  a period  of two  years after  the completion  of the  Offering without the
consent of Lehman Brothers Inc. Such restrictions will not apply to any OP Units
or other shares of Common Stock purchased or otherwise acquired by Messrs. Ziman
or Coleman following consummation of the Offering.
 
    The Company  has agreed  for a  period of  180 days  from the  date of  this
Prospectus,  not to, directly  or indirectly, offer for  sale, sell or otherwise
dispose of (or enter  into any transaction  or device which  is designed to,  or
could be expected to, result in the disposition by any person at any time in the
future  of) shares  of Common  Stock (other than  the shares  offered hereby and
shares issued pursuant to the Stock  Incentive Plan existing on the date  hereof
and any OP Units or shares of Common Stock that may be issued in connection with
any acquisition of a property) or sell or grant options, rights or warrants with
respect  to any shares of Common Stock (other than the grant of options pursuant
to the Stock  Incentive Plan  existing on the  date hereof),  without the  prior
written consent of Lehman Brothers Inc.
 
    The  Company has agreed to pay Lehman Brothers Inc. an advisory fee equal to
 .50% of  the gross  proceeds  received from  the sale  of  Common Stock  of  the
Offering  for  advisory services  rendered  in connection  with  the evaluation,
analysis and structuring of the Company's formation and the Offering.
 
    Although the  Conduct  Rules  of  the  National  Association  of  Securities
Dealers,  Inc. exempt  REITs from the  conflict of  interest provisions thereof,
because an affiliate of Lehman Brothers Inc.  will receive more than 10% of  the
net proceeds of the Offering in repayment of currently outstanding indebtedness,
the  Underwriters have determined to conduct the Offering in accordance with the
applicable provisions of  Rule 2710(c)(8)  of the Conduct  Rules. In  accordance
with   these  requirements,   Dean  Witter   Reynolds  Inc.   (the  "Independent
Underwriter")  is  assuming  the   responsibilities  of  acting  as   "qualified
independent underwriter," and will recommend the maximum initial public offering
price  for the shares of Common Stock in compliance with the requirements of the
Conduct Rules. In connection with  the Offering, the Independent Underwriter  is
performing  due diligence investigations  and is reviewing  and participating in
the preparation of this Prospectus and the Registration Statement of which  this
Prospectus  forms a part. The initial public  offering price of the Common Stock
will be no higher than the price recommended by the Independent Underwriter.
 
    The Underwriters have reserved for sale  at the public offering price up  to
500,000  shares  of Common  Stock to  directors, officers  and employees  of the
Company, their business  affiliates and  related parties who  have expressed  an
interest  in purchasing shares. The  number of shares available  for sale to the
general public will be reduced to the extent such persons purchase such reserved
shares. Any reserved shares not so purchased will be offered by the Underwriters
to the general public on the same basis as the other shares offered hereby.
 
                                    EXPERTS
 
    The combined financial statements of  the Arden Predecessors as of  December
31,  1995 and 1994 and for each of  the three years in the period ended December
31, 1995, the  statements of revenues  and certain expenses  for 16000  Ventura;
1950  Sawtelle; Westwood Terrace, Skyview Center, 4811 and 4900/10 Airport Plaza
Drive and New Wilshire;  70 South Lake and  Calabasas Commerce Center; the  1996
Acquired
 
                                      134
<PAGE>
   
Properties,  the Acquisition Properties, and the  balance sheet of Arden Realty,
Inc., a Maryland Corporation as of May 1, 1996, all appearing in this Prospectus
and Registration Statement, have been audited by Ernst & Young LLP,  independent
auditors,  as set forth in their reports thereon appearing elsewhere herein, and
are included in reliance upon such reports given upon the authority of such firm
as experts in accounting and auditing.
    
 
    The C&W Market Study was prepared for the Company by Cushman & Wakefield  of
California,  Inc.,  which  is  a  real  estate  service  firm  with  significant
experience and expertise relating to the Southern California office markets  and
the  various  submarkets  therein.  C&W  is a  part  of  a  national  network of
affiliated companies providing real estate related services. The statistical and
other information from  the C&W Market  Study appearing in  this Prospectus  and
Registration  Statement has been included herein  in reliance on C&W's expertise
as a real estate services firm,  with respect to the Southern California  office
markets.
 
                                 LEGAL MATTERS
 
   
    Certain  legal  matters will  be passed  upon  for the  Company by  Latham &
Watkins and  certain legal  matters, including  the validity  of the  shares  of
Common  Stock offered  hereby, will  be passed upon  for the  Company by Ballard
Spahr Andrews & Ingersoll.  In addition, the description  of federal income  tax
consequences  contained in this Prospectus under the heading "Federal Income Tax
Consequences" is  based upon  the opinion  of Latham  & Watkins.  Certain  legal
matters  will be  passed upon  for the  Underwriters by  Hogan &  Hartson L.L.P.
Latham &  Watkins and  Hogan &  Hartson L.L.P.  will rely  upon the  opinion  of
Ballard Spahr Andrews & Ingersoll as to all matters of Maryland law.
    
 
                             ADDITIONAL INFORMATION
 
    The  Company  has filed  with the  Securities  and Exchange  Commission (the
"SEC") a Registration  Statement on  Form S-11 (of  which this  Prospectus is  a
part)  under the Securities  Act with respect to  the securities offered hereby.
This Prospectus does not contain all  information set forth in the  Registration
Statement, certain portions of which have been omitted as permitted by the rules
and  regulations of the SEC.  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,  which may  be obtained from  the SEC  as its  principal
office  at 450 Fifth Street,  N.W., Washington, D.C. 20549,  upon payment of the
fees prescribed by the  SEC. The SEC maintains  a website at  http://www.sec.gov
containing  reports,  proxy  and information  statements  and  other information
regarding registrants, including the Company, that file electronically with  the
SEC. In addition, the Common Stock will be listed on the New York Stock Exchange
("NYSE")  and similar  information concerning the  Company can  be inspected and
copied at the offices of the NYSE, 20 Broad Street, New York, New York 10005.
 
    The  Company  intends  to  furnish  its  stockholders  with  annual  reports
containing  audited  combined  financial  statements  and  a  report  thereon by
independent certified public accountants.
 
                                      135
<PAGE>
                                    GLOSSARY
 
    Unless the context otherwise requires, the following capitalized terms shall
have the meanings set forth below for the purposes of this Prospectus:
 
    "1940 ACT" means the Investment Company Act of 1940, as amended.
 
    "1993 ACT" means the Omnibus Budget Reconciliation Act of 1993.
 
    "1995  ACQUIRED  PROPERTIES"  means the  nine  commercial  office properties
located in Southern California which were acquired by the Arden Predecessors  in
1995.
 
    "1996  ACQUIRED  PROPERTIES"  means the  five  commercial  office properties
located in  Southern California  which  were acquired  or  are scheduled  to  be
acquired by the Arden Predecessors in 1996.
 
    "401(K) PLAN" means the Arden Realty Group Section 401(k) Savings/Retirement
Plan.
 
    "ACM" means asbestos-containing materials.
 
    "ACQUISITION  PROPERTIES" means the two  additional Properties (303 Glenoaks
and  12501  East  Imperial  Highway)  that  will  be  acquired  by  the  Company
concurrently with the Offering.
 
    "ADA" means the Americans with Disabilities Act.
 
    "ANNUALIZED  BASE RENT"  means the monthly  contractual base  rent under the
applicable lease(s)  (e.g., relating  to a  tenant,  a Property  or all  of  the
Properties, as applicable) as of a specified date multiplied by 12.
 
    "AFFILIATES"  means  with respect  to any  individual  or entity,  any other
individual or entity directly or indirectly controlling, controlled by or  under
common control with such individual or entity.
 
    "ARDEN" means Arden Realty Group, Inc., a California corporation.
 
    "ARDEN PREDECESSORS" means Arden and certain Arden affiliated entities which
are  engaged  in  owning,  acquiring, managing,  leasing  and  renovating office
properties in Southern California.
 
    "BENEFICIARY" means  a qualified  charitable  organization selected  by  the
Company  to receive  in trust  any excess  shares resulting  from a  transfer of
Common Stock in violation of the Ownership Limit or the Charter.
 
    "BOOK-TAX DIFFERENCE" means 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.
 
    "BUILT-IN GAIN  ASSET"  means any  asset  acquired  by the  Company  from  a
corporation which is or has been a C corporation.
 
    "BYLAWS" means the bylaws of the Company.
 
    "C&W" means Cushman & Wakefield of California, Inc.
 
    "C&W  MARKET  STUDY"  means  the  Office  Market  Study  of  Three  Southern
California Counties (Los Angeles, Orange,  and San Diego Counties) prepared  for
the Company by Cushman & Wakefield as of December 31, 1995.
 
    "CHARITABLE  BENEFICIARY" means a qualified charitable organization selected
by the Company  which will be  the beneficiary of  a trust created  to hold  any
excess shares.
 
    "CHARTER" means the charter of the Company.
 
    "CMBS  OFFERING" means an offering  of commercial mortgage-backed securities
in an amount of approximately $104  million which the Company intends to  engage
in to refinance the Mortgage Financing.
 
    "CODE" means the Internal Revenue Code of 1986, as amended.
 
    "COMMON  STOCK" means shares  of the Company's Common  Stock, $.01 par value
per share.
 
                                      136
<PAGE>
    "COMPANY" means  Arden  Realty,  Inc., a  Maryland  corporation.  While  the
Company  and  the  Operating  Partnership are  separate  entities,  for  ease of
reference and  unless the  context otherwise  requires, all  references in  this
Prospectus to the "Company" refer to the Company and the Operating Partnership.
 
    "CONTRIBUTION AGREEMENTS" means separate contribution agreements between (i)
the  Operating Partnership and certain Participants whereby certain interests in
the  Arden  Predecessors  and  in  certain  of  the  Properties  held  by   such
Participants will be contributed to the Operating Partnership in exchange for OP
Units and (ii) the Operating Partnership and Arden whereby Arden will contribute
certain of its assets to the Operating Partnership in exchange for OP Units.
 
    "CONTROLLED  FOREIGN  CORPORATION"  means  generally  a  foreign corporation
controlled by United States stockholders.
 
    "CREDIT FACILITY"  means the  proposed $100  million credit  facility  being
restructured by the Company.
 
    "CPI" means the Consumer Price Index.
 
    "CUSHMAN & WAKEFIELD" means Cushman & Wakefield of California, Inc.
 
    "DOL" means the Department of Labor.
 
    "DOL REGULATION" means the regulation issued by the DOL defining Plan Assets
for certain purposes.
 
    "DOMESTICALLY  CONTROLLED REIT " means 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.
 
    "DOUBLE TAXATION" means  taxation at  the corporate  and stockholder  levels
that generally results from investment in a corporation.
 
    "DOWNTOWN/CBD" means the Los Angeles central business district.
 
    "ENVIRONMENTAL  LAWS"  means  the  various Federal,  state  and  local laws,
ordinances and regulations relating to the protection of the environment.
 
    "ERISA PLAN" means an employee benefit plan subject to ERISA.
 
    "EXCHANGE ACT" means the Securities Exchange Act of 1934, as amended.
 
    "GAAP" means generally accepted accounting principles.
 
    "INDEPENDENT UNDERWRITER" means Dean Witter Reynolds Inc. which will act  as
qualified  independent underwriter and will recommend the maximum initial public
offering price for the shares of Common Stock.
 
    "INTERESTED STOCKHOLDER" means any person who beneficially owns ten  percent
or more of the voting power of a corporation's shares.
 
    "IRA" means an individual retirement account or annuity.
 
    "IRS" means the Internal Revenue Service.
 
    "LC" means leasing commissions.
 
    "LEASED"  refers  to space  for  which leases  have  been executed  and have
commenced as of the specified date.
 
    "LIMITED PARTNERS" means the limited partners of the Operating Partnership.
 
    "LOS ANGELES EDC" means the Los Angeles Economic Development Corporation.
 
    "LOS ANGELES PMSA"  means the  Los Angeles/Long  Beach Primary  Metropolitan
Statistical Area.
 
    "LOS  ANGELES PMSA" means  the Los Angeles  Primary Metropolitan Statistical
Area.
 
    "MGCL" means the Maryland General Corporation Law, as amended.
 
    "MORTGAGE FINANCING" means the one  year interim loan of approximately  $104
million to the Company.
 
                                      137
<PAGE>
    "MORTGAGE FINANCING PROPERTIES" means the following nine Properties: Skyview
Center,  9665 Wilshire, Westwood  Terrace, 425 West  Broadway, 5000 East Spring,
Anaheim City Centre, 16000 Ventura Blvd., Imperial Bank Tower and 1950 Sawtelle.
 
    "NAMED EXECUTIVE OFFICERS" means the  Company's six most highly  compensated
executive officers including the Chief Executive Officer.
 
    "NAREIT" means the National Association of Real Estate Investment Trusts.
 
    "NON-ERISA  PLAN" means  an IRA  or a  qualified pension,  profit sharing or
stock bonus plan not subject to ERISA.
 
    "NON-U.S. STOCKHOLDERS" means the persons  that are, for purposes of  United
States   federal  income   taxation,  nonresident   alien  individuals,  foreign
corporations, foreign partnerships or foreign estates or trusts.
 
    "NYSE" means the New York Stock Exchange, Inc..
 
    "OFFERING" means  the Offering  of shares  of Common  Stock of  the  Company
pursuant to and as described in this Prospectus.
 
    "OPERATING  PARTNERSHIP" means Arden Realty  Limited Partnership, a Maryland
limited partnership.
 
    "OPTION AGREEMENTS" means separate option agreements between the Company and
certain Participants whereby certain interests in the Arden Predecessors and  in
certain  of the Properties held by such  Participants will be transferred to the
Company in exchange for cash.
 
    "OP UNITS" means the limited and general partner interests in the  Operating
Partnership.
 
    "OWNERSHIP  LIMIT"  means the  Company's  Charter provision  prohibiting any
stockholder or group of  affiliated stockholders from owning  more than 9.0%  of
the outstanding Common Stock.
 
    "PARTNERSHIP  AGREEMENT" means the  agreement of limited  partnership of the
Operating Partnership.
 
    "PARTICIPANTS" means the parties participating in the Formation Transactions
including the Company and the Operating Partnership, together with the  partners
and  members of  the Arden Predecessors  and other parties  which hold ownership
interests in certain of the Properties.
 
    "PEER GROUP" means  the group  of properties  identified in  the C&W  Market
Study  that are  most similar  in terms of  quality, market  position and tenant
appeal to each of the Company's Properties.
 
    "PFG" means Pacific Financial Group, a California limited partnership.
 
    "PHASE I ASSESSMENTS" means Phase  I Environmental Assessments conducted  by
environmental consultants.
 
    "PLAN  ASSETS" means the assets of the Company which are deemed to be assets
of an ERISA Plan or other plan.
 
    "PREFERRED STOCK" means the $.01 par value preferred stock of the Company.
 
    "PROHIBITED OWNER" means the person or entity holding record title to shares
of the Company in excess of the Ownership Limit.
 
    "PROHIBITED TRANSFEREE" means any  transfer of Common  Stock of the  Company
whereby  the  purported  transfer  would  result  in  any  person  violating the
Ownership Limit.
 
    "PROPERTIES" means  the  24  office  properties  referred  to  herein  which
comprise the Company's portfolio of Southern California office properties.
 
    "PROPOSED  REGULATIONS" means Treasury Regulations proposed by the IRS which
have not been issued in permanent form.
 
    "PUBLICLY-OFFERED SECURITY" means  a security  that is  widely held,  freely
transferable  and  either part  of a  class of  securities registered  under the
Exchange  Act,  or  sold  pursuant   to  an  effective  registration   statement
 
                                      138
<PAGE>
under  the  Securities Act  (provided the  securities  are registered  under the
Exchange Act within 120 days,  or such later time as  may be allowed by the  SEC
(the registration period), after the end of the fiscal year of the issuer during
which the offering occurred).
 
    "RECOGNITION  PERIOD"  means the  ten-year period  beginning  on the  date a
Built-In Gain Asset is acquired by the Company.
 
    "REIT" means real estate investment trust as defined by Sections 856 through
860 of the Code and applicable Treasury Regulations.
 
    "RELATED PARTY TENANT" means a  tenant actually or constructively owned  10%
or more by the REIT or an owner of 10% or more of the REIT.
 
    "REPLACEMENT COST RENTS" as defined in the C&W Market Study means the rental
rates  that would be required to provide  a reasonable return on investment to a
developer of a new Class A multi-tenant office building.
 
    "REPRESENTATIVES"  means   Lehman  Brothers   Inc.,  Alex.   Brown  &   Sons
Incorporated, Dean Witter Reynolds Inc., A.G. Edwards & Sons, Inc., Smith Barney
Inc.,  EVEREN Securities, Inc., Legg Mason  Wood Walker Incorporated and Raymond
James & Associates, Inc.
 
    "RESTRICTED SHARES"  means  the  shares  of Common  Stock  acquired  by  any
Participant  in exchange for OP Units  which will be restricted securities under
the meaning of Rule 144 promulgated under the Securities Act.
 
    "RULE 144" means Rule 144 promulgated under the Securities Act.
 
    "SECURITIES ACT" means the Securities Act of 1933, as amended.
 
    "SAME STORE  PROPERTIES"  means those  Properties  that were  owned  by  the
Company for the entire six months ended June 30, 1995 and June 30, 1996.
 
    "SFAS" means Statements of Financial Accounting Standards.
 
    "STOCK  INCENTIVE PLAN" means the 1996  Stock Incentive Plan of Arden Realty
Group, Inc. and Arden Realty Group, Ltd.
 
    "SWAP AGREEMENT" means the forward swap agreement in the notional amount  of
$104  million which the Company intends to enter into with an affiliate of Wells
Fargo Bank  at the  time of  this  Offering and  the Formation  Transactions  or
shortly thereafter.
 
    "TI" means tenant improvements.
 
    "UBTI" means unrelated business taxable income.
 
    "UNDERWRITERS"  means  the  underwriters  of the  Offering  for  whom Lehman
Brothers Inc., Alex. Brown & Sons Incorporated, Dean Witter Reynolds Inc.,  A.G.
Edwards  & Sons,  Inc., Smith Barney  Inc., EVEREN Securities,  Inc., Legg Mason
Wood Walker Incorporated,  and Raymond James  & Associates, Inc.  are acting  as
representatives.
 
    "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.
 
    "UST" means underground storage tank.
 
    "WHITE PAPER" means the White Paper on Funds from Operations approved by the
Board of Governors of the NAREIT in March of 1995.
 
                                      139
<PAGE>
                         INDEX TO FINANCIAL STATEMENTS
 
<TABLE>
<CAPTION>
                                                                                                              PAGE
                                                                                                            ---------
<S>                                                                                                         <C>
ARDEN REALTY, INC.
Pro Forma Condensed Combined Financial Statements (Unaudited):............................................        F-3
  Pro Forma Condensed Combined Balance Sheet as of June 30, 1996..........................................        F-4
  Pro Forma Condensed Combined Statement of Operations for the Six Months Ended June 30, 1996.............        F-5
  Pro Forma Condensed Combined Statement of Operations for the Year Ended December 31, 1995...............        F-6
  Notes to Pro Forma Condensed Combined Financial Statements..............................................        F-7
 
Historical:
  Report of Independent Auditors..........................................................................       F-10
  Balance Sheet as of May 1, 1996 and June 30, 1996 (Unaudited)...........................................       F-11
  Notes to Balance Sheet..................................................................................       F-12
 
ARDEN PREDECESSORS
Combined Financial Statements:
  Report of Independent Auditors..........................................................................       F-15
  Combined Balance Sheets as of June 30, 1996 (Unaudited) and December 31, 1995 and 1994..................       F-16
  Combined Statements of Operations for the Six Months ended June 30, 1996 and 1995 (Unaudited) and the
   Years Ended December 31, 1995, 1994 and 1993...........................................................       F-17
  Combined Statements of Owners' Equity for the Six Months ended June 30, 1996 (Unaudited) and the Years
   Ended December 31, 1995, 1994 and 1993.................................................................       F-18
  Combined Statements of Cash Flows for the Six Months ended June 30, 1996 and 1995 (Unaudited) and the
   Years Ended December 31, 1995, 1994 and 1993...........................................................       F-19
  Notes to Combined Financial Statements..................................................................       F-20
  Schedule III - Commercial Office Properties and Accumulated Depreciation................................       F-29
 
16000 VENTURA
Statement of Revenue and Certain Expenses:
  Report of Independent Auditors..........................................................................       F-31
  Statement of Revenue and Certain Expenses for the Period January 1, 1995 to March 15, 1995..............       F-32
  Notes to Statement of Revenue and Certain Expenses......................................................       F-33
 
1950 SAWTELLE
Statement of Revenue and Certain Expenses:
  Report of Independent Auditors..........................................................................       F-34
  Statement of Revenue and Certain Expenses for the Period January 1, 1995 to June 14, 1995...............       F-35
  Notes to Statement of Revenue and Certain Expenses......................................................       F-36
 
WESTWOOD TERRACE, SKYVIEW CENTER, 4811 AND 4900/10 AIRPORT PLAZA DRIVE AND NEW WILSHIRE
Combined Statement of Revenue and Certain Expenses:
  Report of Independent Auditors..........................................................................       F-37
  Combined Statement of Revenue and Certain Expenses for the Period December 1, 1994 to November 22,
   1995...................................................................................................       F-38
  Notes to Combined Statement of Revenue and Certain Expenses.............................................       F-39
</TABLE>
 
                                      F-1
<PAGE>
<TABLE>
<CAPTION>
                                                                                                              PAGE
                                                                                                            ---------
70 SOUTH LAKE AND CALABASAS COMMERCE CENTER
<S>                                                                                                         <C>
Combined Statement of Revenue and Certain Expenses:
  Report of Independent Auditors..........................................................................       F-41
  Combined Statement of Revenue and Certain Expenses for the Period January 1, 1995 to November 22,
   1995...................................................................................................       F-42
  Notes to Combined Statement of Revenue and Certain Expenses.............................................       F-43
 
1996 ACQUIRED PROPERTIES
Combined Statements of Revenue and Certain Expenses:
  Report of Independent Auditors..........................................................................       F-45
  Combined Statements of Revenue and Certain Expenses for the 1996 Interim Period Prior to Acquisition
   (Unaudited) and the Year Ended December 31, 1995.......................................................       F-46
  Notes to Combined Statements of Revenue and Certain Expenses............................................       F-47
 
ACQUISITION PROPERTIES
Combined Statements of Revenue and Certain Expenses:
  Report of Independent Auditors..........................................................................       F-49
  Combined Statements of Revenue and Certain Expenses for the Six Months Ended June 30, 1996 and 1995
   (Unaudited) and the Year Ended December 31, 1995.......................................................       F-50
  Notes to Combined Statements of Revenue and Certain Expenses............................................       F-51
</TABLE>
 
                                      F-2
<PAGE>
                               ARDEN REALTY, INC.
 
               PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS
 
                                  (UNAUDITED)
 
    The  unaudited pro  forma financial  and operating  information for  the six
months ended June 30, 1996 and the year ended December 31, 1995 is presented  as
if  the  Offering, the  Formation Transactions  (including  the purchase  of the
Acquisition Properties), and the acquisitions of the Properties acquired  during
1996  prior to the Offering (the  "1996 Acquired Properties") and the Properties
acquired during 1995 (the  "1995 Acquired Properties") all  had occurred by  the
date  of the June  30, 1996 combined balance  sheet and at  the beginning of the
period presented for the combined statements  of operations. The pro forma  June
30,  1996  balance  sheet information  also  gives  effect to  the  recording of
minority interests for OP Units, as  if these transactions occurred on June  30,
1996.
 
    The  pro forma financial  statements are not  necessarily indicative of what
the Company's  financial  position or  results  of operations  would  have  been
assuming  the completion of the Formation  Transactions and the Offering on such
date or at the beginning of the period indicated, nor does it purport to project
the Company's financial position or results of operations at any future date  or
for any future period.
 
                                      F-3
<PAGE>
                               ARDEN REALTY, INC.
 
                   PRO FORMA CONDENSED COMBINED BALANCE SHEET
                              AS OF JUNE 30, 1996
                                  (UNAUDITED)
                                 (IN THOUSANDS)
 
                                     ASSETS
 
   
<TABLE>
<CAPTION>
                                                     HISTORICAL     INVESTMENTS
                                                       ARDEN      IN NONCOMBINED    PRO FORMA     COMPANY
                                                    PREDECESSORS     ENTITIES      ADJUSTMENTS   PRO FORMA
                                                    ------------  ---------------  -----------  -----------
<S>                                                 <C>           <C>              <C>          <C>
Commercial office properties-net..................   $  254,749      $  91,555      $  54,831(F)  $ 410,160
                                                                                        8,673(C)
                                                                                          352(I)
 
Cash and cash equivalents.........................          913            495        347,433(A)     12,658
                                                                                      (26,777)(C)
                                                                                      102,216(D)
                                                                                     (358,001)(E)
                                                                                      (54,831)(F)
                                                                                        1,210(B)
Restricted cash...................................       17,334          1,932        (19,266)(E)     --
Rents and other receivables.......................        2,577            167         --            2,744
Deferred rents....................................        2,996          1,761         --            4,757
Prepaid financing and leasing costs-net...........        1,659          1,588           (757)(G)      4,274
                                                                                         1085(D)
                                                                                          699(D)
Prepaid expenses and other assets.................        2,868            330         (1,210)(B)      1,988
Investments in noncombined entities...............        3,069         (3,069)        --           --
                                                    ------------       -------     -----------  -----------
    Total assets..................................   $  286,165      $  94,759      $  55,656    $ 436,581
                                                    ------------       -------     -----------  -----------
                                                    ------------       -------     -----------  -----------
 
                                   LIABILITIES AND STOCKHOLDERS' EQUITY
 
Mortgage loans payable............................   $  263,492      $  86,420      $ 104,000(D)  $ 104,000
                                                                                     (349,912)(E)
Unsecured lines of credit.........................        2,467              0         (2,467)(E)     --
Accounts payable and accrued expenses.............        4,726          1,398         (1,397)(E)      4,727
Deferred interest.................................        5,318            281         (5,599)(E)     --
Security deposits.................................        1,914            827         --            2,741
                                                    ------------       -------     -----------  -----------
    Total liabilities.............................      277,917         88,926       (255,375)     111,468
                                                    ------------       -------     -----------  -----------
Minority interests................................          718           (718)        43,231(I)     43,231
Owners' Equity....................................        7,530          6,551        (14,081)(H)     --
Stockholders' Equity:
  Common Stock....................................       --             --                189(A)        189
  Additional paid-in capital......................       --             --            347,244(A)    281,693
                                                                                       (9,175)(C)
                                                                                         (757)(G)
                                                                                        5,599(E)
                                                                                       14,081(H)
                                                                                      (23,491)(E)
                                                                                      (42,879)(I)
                                                                                       (8,929)(C)
                                                    ------------       -------     -----------  -----------
    Total stockholders' equity....................       --             --            281,882      281,882
                                                    ------------       -------     -----------  -----------
    Total liabilities and equity..................   $  286,165      $  94,759      $  55,656    $ 436,580
                                                    ------------       -------     -----------  -----------
                                                    ------------       -------     -----------  -----------
</TABLE>
    
 
                            See accompanying notes.
 
                                      F-4
<PAGE>
                               ARDEN REALTY, INC.
              PRO FORMA CONDENSED COMBINED STATEMENT OF OPERATIONS
                     FOR THE SIX MONTHS ENDED JUNE 30, 1996
                                  (UNAUDITED)
                      (IN THOUSANDS EXCEPT PER SHARE DATA)
 
   
<TABLE>
<CAPTION>
                                                            EQUITY IN    PRE-ACQUISITION
                                             HISTORICAL   NET (LOSS) OF    PERIOD FOR
                                               ARDEN       NONCOMBINED    1996 ACQUIRED   ACQUISITION   PRO FORMA     COMPANY
                                            PREDECESSORS    ENTITIES       PROPERTIES     PROPERTIES   ADJUSTMENTS   PRO FORMA
                                            ------------  -------------  ---------------  -----------  -----------  -----------
<S>                                         <C>           <C>            <C>              <C>          <C>          <C>
REVENUE
  Rental..................................   $   19,404     $   7,937       $   3,923      $   2,101    $     128(J)  $  33,493
  Tenant reimbursements...................        1,425           308             258             58       --            2,049
  Parking.................................        2,121           574             308             87       --            3,090
  Other...................................        1,521           166             144            174         (701)(K)      1,304
                                            ------------       ------          ------     -----------  -----------  -----------
    Total revenue.........................       24,471         8,985           4,633          2,420         (573)      39,936
                                            ------------       ------          ------     -----------  -----------  -----------
EXPENSES
  Property operating, taxes, insurance and
   ground rent............................        8,252         3,293           1,489          1,021           69(L)     14,124
  General and administrative..............          830           435          --             --              635(M)      1,900
  Interest................................       14,741         4,317          --             --          (15,000)(N)      4,058
  Depreciation and amortization...........        3,036         1,673          --             --            1,065(O)      5,774
                                            ------------       ------          ------     -----------  -----------  -----------
    Total expenses........................       26,859         9,718           1,489          1,021      (13,231)      25,856
                                            ------------       ------          ------     -----------  -----------  -----------
Equity in net (loss) of noncombined
 entities.................................          (94)           94          --             --           --           --
                                            ------------       ------          ------     -----------  -----------  -----------
(Loss) income before minority interests...       (2,482)         (639)          3,144          1,399       12,658(P)     14,080
Minority interests........................          344          (344)         --             --           (1,871)(Q)     (1,871)
                                            ------------       ------          ------     -----------  -----------  -----------
Net (loss) income.........................   $   (2,138)    $    (983)      $   3,144      $   1,399    $  10,787    $  12,209
                                            ------------       ------          ------     -----------  -----------  -----------
                                            ------------       ------          ------     -----------  -----------  -----------
Pro forma common shares outstanding before
 conversion of OP units...................                                                                              18,243
                                                                                                                    -----------
                                                                                                                    -----------
Net income per share......................                                                                                $.70
                                                                                                                    -----------
                                                                                                                    -----------
</TABLE>
    
 
                            See accompanying notes.
 
                                      F-5
<PAGE>
                               ARDEN REALTY, INC.
 
              PRO FORMA CONDENSED COMBINED STATEMENT OF OPERATIONS
                      FOR THE YEAR ENDED DECEMBER 31, 1995
                                  (UNAUDITED)
                      (IN THOUSANDS EXCEPT PER SHARE DATA)
   
<TABLE>
<CAPTION>
                                                        EQUITY IN
                                                        NET (LOSS)   PRE-ACQUISITION
                                          HISTORICAL        OF         PERIOD FOR       1996
                                            ARDEN      NONCOMBINED   1995 ACQUIRED    ACQUIRED    ACQUISITION   PRO FORMA
                                         PREDECESSORS    ENTITIES      PROPERTIES    PROPERTIES   PROPERTIES   ADJUSTMENTS
                                         ------------  ------------  --------------  -----------  -----------  -----------
<S>                                      <C>           <C>           <C>             <C>          <C>          <C>
REVENUE
  Rental...............................   $    8,832    $   15,610     $   16,564     $  19,391    $   4,280    $   2,014(J)
  Tenant reimbursements................          403           419          1,073           961           54       --
  Parking..............................          750           915          2,238         1,859          133       --
  Other................................        1,707           776            877           350           85       (1,355)(K)
                                         ------------  ------------       -------    -----------  -----------  -----------
    Total revenue......................       11,692        17,720         20,752        22,561        4,552          659
                                         ------------  ------------       -------    -----------  -----------  -----------
EXPENSES
  Property operating, taxes, insurance
   and ground rent.....................        3,339         6,927          7,813         8,848        2,228          936(L)
  General and administrative...........        1,377           831         --            --           --            1,592(M)
  Interest.............................        5,537         8,243         --            --           --           (5,704)(N)
  Depreciation and amortization........        1,898         2,475         --            --           --            7,176(O)
                                         ------------  ------------       -------    -----------  -----------  -----------
    Total expenses.....................       12,151        18,476          7,813         8,848        2,228        4,000
                                         ------------  ------------       -------    -----------  -----------  -----------
Equity in net (loss) of noncombined
 entities..............................         (116)          116         --            --           --           --
                                         ------------  ------------       -------    -----------  -----------  -----------
(Loss) income before minority
 interests.............................         (575)         (640)        12,939        13,713        2,324       (3,341)
Minority interests.....................           (1)            1         --            --           --           (3,245)(P)
                                         ------------  ------------       -------    -----------  -----------  -----------
Net (loss) income......................   $     (576)   $     (639)    $   12,939     $  13,713    $   2,324    $  (6,586)(Q)
                                         ------------  ------------       -------    -----------  -----------  -----------
                                         ------------  ------------       -------    -----------  -----------  -----------
Pro forma common shares outstanding
 before conversion of OP units.........
Net income per share...................
 
<CAPTION>
 
                                           COMPANY
                                          PRO FORMA
                                         -----------
<S>                                      <C>
REVENUE
  Rental...............................   $  66,691
  Tenant reimbursements................       2,910
  Parking..............................       5,895
  Other................................       2,440
                                         -----------
    Total revenue......................      77,936
                                         -----------
EXPENSES
  Property operating, taxes, insurance
   and ground rent.....................      30,091
  General and administrative...........       3,800
  Interest.............................       8,076
  Depreciation and amortization........      11,549
                                         -----------
    Total expenses.....................      53,516
                                         -----------
Equity in net (loss) of noncombined
 entities..............................      --
                                         -----------
(Loss) income before minority
 interests.............................      24,420
Minority interests.....................      (3,245)
                                         -----------
Net (loss) income......................   $  21,175
                                         -----------
                                         -----------
Pro forma common shares outstanding
 before conversion of OP units.........      18,243
                                         -----------
                                         -----------
Net income per share...................       $1.23
                                         -----------
                                         -----------
</TABLE>
    
 
                            See accompanying notes.
 
                                      F-6
<PAGE>
                               ARDEN REALTY, INC.
                     NOTES TO PRO FORMA CONDENSED COMBINED
                              FINANCIAL STATEMENTS
                                  (UNAUDITED)
                                 (IN THOUSANDS)
 
1.  ADJUSTMENTS TO THE PRO FORMA CONDENSED COMBINED BALANCE SHEET
    The adjustments to the Pro Forma Condensed Combined Balance Sheet as of June
30, 1996 are as follows:
 
   
<TABLE>
<S>        <C>                                                                         <C>
(A)        Sale of 18,848 shares of common stock in the offering
                 Proceeds from offering..............................................  $ 376,950
                 Costs associated with offering including prepaid offering costs.....    (29,517)
                                                                                       ----------
                   Net proceeds......................................................  $ 347,433
                                                                                       ----------
                                                                                       ----------
                 Par value of common stock to be issued..............................  $     189
                 Additional paid in capital from proceeds of sale of common stock....    347,244
                                                                                       ----------
                                                                                       $ 347,433
                                                                                       ----------
                                                                                       ----------
(B)        Reclassification of offering costs prepaid by the Arden Predecessors prior
            to June 30, 1996.........................................................  $  (1,210)
                                                                                       ----------
                                                                                       ----------
(C)        Acquisition of certain interests of the Participants for cash
                 Reduction in additional paid-in capital for book value of interests
                  acquired...........................................................  $   9,175
                 Reduction in additional paid-in capital for distributions to
                  affiliates of cash paid in excess of book value of interests.......      8,929
                 Purchase price in excess of book value of interests in the
                  properties purchased from nonaffiliates............................      8,673
                                                                                       ----------
                                                                                       $  26,777
                                                                                       ----------
                                                                                       ----------
(D)        Mortgage financing and line of credit commitment fees
                 Proceeds from new debt..............................................  $ 104,000
                 Costs associated with new debt origination..........................     (1,085)
                 Prepaid commitment fees.............................................       (699)
                                                                                       ----------
                                                                                       $ 102,216
                                                                                       ----------
                                                                                       ----------
(E)        Repayment of certain mortgage loans and unsecured lines of credit of the
            Arden Predecessors
                 Payment of mortgage loans...........................................  $ 349,912
                 Payment of unsecured lines of credit................................      2,467
                 Payment of additional interest on debt (includes deferred interest
                  of $5,599 which was accrued as of June 30, 1996, and $17,892 of
                  additional interest currently due as a result of the prepayment)...     23,491
                 Payment of accrued interest.........................................      1,397
                 Release of restricted cash to repay mortgage loans..................    (19,266)
                                                                                       ----------
                                                                                       $ 358,001
                                                                                       ----------
                                                                                       ----------
(F)        Purchase price and actual and estimated additional closing costs of 100
            Broadway and Acquisition Properties......................................  $  54,831
                                                                                       ----------
                                                                                       ----------
(G)        Write off of unamortized loan fees........................................  $    (757)
                                                                                       ----------
                                                                                       ----------
(H)        Elimination of owners' equity.............................................  $ (14,081)
                                                                                       ----------
                                                                                       ----------
</TABLE>
    
 
                                      F-7
<PAGE>
                               ARDEN REALTY, INC.
                     NOTES TO PRO FORMA CONDENSED COMBINED
                      FINANCIAL STATEMENTS -- (CONTINUED)
                                  (UNAUDITED)
                                 (IN THOUSANDS)
 
1.  ADJUSTMENTS TO THE PRO FORMA CONDENSED COMBINED BALANCE SHEET (CONTINUED)
   
<TABLE>
<S>        <C>                                                                         <C>
(I)        To establish minority interests in Operating Partnership based on units
            issued...................................................................  $  43,231
           Excess of fair value over book value related to issuance of Operating
            Partnership units to nonaffiliates.......................................       (352)
                                                                                       ----------
                                                                                       $  42,879
                                                                                       ----------
                                                                                       ----------
      Total Equity before percentage allocable to minority interests.................  $ 325,113
      Percentage allocable to minority interests.....................................      13.29%
                                                                                       ----------
                                                                                       $  43,231
                                                                                       ----------
                                                                                       ----------
</TABLE>
    
 
   
<TABLE>
<S>                                                                <C>        <C>        <C>
      Minority OP Units..........................................      2,889      13.29%
      Total Shares Issued........................................     18,853      86.71%
                                                                   ---------  ---------
      Total......................................................     21,742     100.00%
                                                                   ---------  ---------
                                                                   ---------  ---------
</TABLE>
    
 
2.  ADJUSTMENTS TO THE PRO FORMA CONDENSED COMBINED STATEMENTS OF OPERATIONS
    The  pro forma  adjustments reflected  in the  Pro Forma  Condensed Combined
Statements of Operations for  the six months  ended June 30,  1996 and the  year
ended December 31, 1995 are set forth below:
 
   
<TABLE>
<CAPTION>
                                                                                      SIX MONTHS
                                                                                        ENDED          YEAR ENDED
                                                                                    JUNE 30, 1996   DECEMBER 31, 1995
                                                                                    --------------  -----------------
<S>        <C>                                                                      <C>             <C>
(J)        Increase in rental revenue to adjust the 1995 Acquired Properties, the
            1996 Acquired Properties and the Acquisition Properties to straight
            line rental revenue based on the acquisition date of the Arden
            Predecessors..........................................................    $      128       $     2,014
                                                                                    --------------        --------
                                                                                    --------------        --------
(K)        Decrease in other income to eliminate non-recurring construction fees
            which would not have been realized by the Company as a REIT and
            certain property management fees that will not be earned..............          (701)           (1,355)
                                                                                    --------------        --------
                                                                                    --------------        --------
(L)        Increase in property general and administrative related to additional
            property payroll costs relating to the 1995 Acquired Properties, the
            1996 Acquired Properties and the Acquisition Properties...............    $       69       $       936
                                                                                    --------------        --------
                                                                                    --------------        --------
(M)        Increase in general and administrative expense related to expected
            level of operations as a public real estate investment trust..........    $      635       $     1,592
                                                                                    --------------        --------
                                                                                    --------------        --------
(N)        Decrease in interest expense
                 Decrease in interest expense due to repayment of mortgage
                  loans...........................................................    $  (19,058)      $   (13,780)
                 Increase in interest expense related to the newly originated
                  non-amortizing debt with an interest rate of 7.43% due in seven
                  years...........................................................         3,864             7,688
                 Increase in amortization of finance costs related to the newly
                  originated debt.................................................           194               388
                                                                                    --------------        --------
                   Net decrease in interest expense...............................    $  (15,000)      $    (5,704)
                                                                                    --------------        --------
                                                                                    --------------        --------
</TABLE>
    
 
                                      F-8
<PAGE>
                               ARDEN REALTY, INC.
                     NOTES TO PRO FORMA CONDENSED COMBINED
                      FINANCIAL STATEMENTS -- (CONTINUED)
                                  (UNAUDITED)
                                 (IN THOUSANDS)
 
2.  ADJUSTMENTS TO THE PRO FORMA CONDENSED COMBINED STATEMENTS OF
OPERATIONS (CONTINUED)
 
   
<TABLE>
<CAPTION>
                                                                                      SIX MONTHS
                                                                                        ENDED          YEAR ENDED
                                                                                    JUNE 30, 1996   DECEMBER 31, 1995
                                                                                    --------------  -----------------
<S>        <C>                                                                      <C>             <C>
(O)        Increase in depreciation expense to reflect a full period of
            depreciation for the 1995 Acquired Properties, the 1996 Acquired
            Properties and the Acquisition Properties utilizing a 40 year useful
            life for buildings and a 10 year useful life for improvements.........    $      936       $     6,918
 
           Increase in depreciation due to the fair value of units or cash paid in
            excess of book value of interests in the properties acquired from the
            nonaffiliates.........................................................           129               258
                                                                                    --------------        --------
                   Net increase in depreciation expense...........................    $    1,065       $     7,176
                                                                                    --------------        --------
                                                                                    --------------        --------
 
           Historical depreciation of the Arden Predecessors......................    $    4,709       $     4,373
 
           Additional depreciation of the 1995 and 1996 Acquired Properties:
 
                 Pro forma depreciation as if the 1995 and 1996 Acquired
                  Properties were purchased on January 1, 1995....................         1,450             6,920
 
                 Historical depreciation recorded by the Arden Predecessors.......          (922)             (818)
                                                                                    --------------        --------
                   Net increase in depreciation expense (the pro forma adjustment
                    for the six months ended June 30, 1996 includes only the 1996
                    Acquired Properties)..........................................           528             6,102
 
           Depreciation on the Acquisition Properties.............................           408               816
 
           Depreciation on the price in excess of book value......................           129               258
                                                                                    --------------        --------
                                                                                      $    5,774       $    11,549
                                                                                    --------------        --------
                                                                                    --------------        --------
(P)        To reflect adjustment for minority interests of 13.29% in the Operating
            Partnership...........................................................    $    1,871       $     3,245
                                                                                    --------------        --------
                                                                                    --------------        --------
(Q)        Pro forma common shares outstanding represents the 18,848 shares to be issued reduced by 610 shares the
            proceeds of which result solely in an increase in cash to be used for reserves and working capital and
            not used to repay debt or acquire property as part of the offering transaction.
</TABLE>
    
 
                                      F-9
<PAGE>
                         REPORT OF INDEPENDENT AUDITORS
 
To the Board of Directors
Arden Realty, Inc.
 
   
    We  have audited  the accompanying  balance sheet  of Arden  Realty, Inc., a
Maryland  corporation,  as  of   May  1,  1996.  This   balance  sheet  is   the
responsibility  of the management of Arden Realty, Inc. Our responsibility is to
express an opinion on the balance sheet 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, the balance sheet presents fairly, in all material respects,
the  financial position of Arden Realty, Inc., a Maryland corporation, as of May
1, 1996 in conformity with generally accepted accounting principles.
 
                                          Ernst & Young LLP
 
Los Angeles, California
May 1, 1996
 
                                      F-10
<PAGE>
                               ARDEN REALTY, INC.
                                 BALANCE SHEET
                       (IN THOUSANDS, EXCEPT SHARE DATA)
 
<TABLE>
<CAPTION>
                                                                                    MAY 1, 1996
                                                                                   --------------  JUNE 30, 1996
                                                                                                   --------------
                                                                                                    (UNAUDITED)
 
<S>                                                                                <C>             <C>
ASSETS...........................................................................  $     --        $     --
                                                                                   --------------  --------------
                                                                                   --------------  --------------
 
LIABILITIES AND STOCKHOLDERS' EQUITY
 
Commitments and contingencies....................................................  $     --        $     --
                                                                                   --------------  --------------
Preferred stock, $.01 par value, 20,000,000 shares authorized, none issued and
 outstanding.....................................................................        --              --
                                                                                   --------------  --------------
Common stock, $.01 par value, 100,000,000 shares authorized, 100 shares issued
 and outstanding as of June 30, 1996 (unaudited).................................        --              --
                                                                                   --------------  --------------
                                                                                   $     --        $     --
                                                                                   --------------  --------------
                                                                                   --------------  --------------
</TABLE>
 
                            See accompanying notes.
 
                                      F-11
<PAGE>
                               ARDEN REALTY, INC.
 
                             NOTES TO BALANCE SHEET
 
1.  ORGANIZATION
    Arden Realty,  Inc. (the  "Company")  is a  Maryland corporation  which  was
formed  on  May  1, 1996,  to  acquire  a portfolio  of  office  properties (the
"Properties") and continue the real estate business of Arden Realty Group, Inc.,
a California corporation, its principals  and certain affiliates and  affiliated
partnerships.  Substantial  ownership  interests  in  the  entities  (the "Arden
Predecessors") that own interests in the  Properties are held by Richard  Ziman,
Victor  Coleman,  Arthur Gilbert  and  their affiliates,  consisting  of related
individuals and entities controlled by them. The Arden Predecessors are  engaged
in  owning,  acquiring, managing,  leasing and  renovating office  properties in
Southern California.
 
    The Company  will be  the sole  general partner  of a  newly formed  limited
partnership  (the "Operating Partnership").  The Company will  initially hold an
aggregate of 86.7% of the ownership interests in the Operating Partnership.  The
Operating  Partnership will initially hold all  the interests in the Properties.
It is expected that  in connection with the  Mortgage Financing discussed  below
the  Operating  Partnership  will  transfer  the  particular  Mortgage Financing
Properties to a financing subsidiary. The Company will conduct substantially all
of its business through the Operating  Partnership. As the sole general  partner
of  the Operating Partnership,  the Company will have  exclusive power to manage
and conduct  the  business of  the  Operating Partnership,  subject  to  certain
limited exceptions.
 
    Concurrently  with the  consummation of  a proposed  public offering  of the
Company's  Common  Stock  (the  "Offering"),  the  Company  and  the   Operating
Partnership,  together with the  partners and members  of the Arden Predecessors
including certain  unaffiliated  investors (collectively,  the  "Participants"),
will  engage in  certain formation transactions  (the "Formation Transactions").
The Formation Transactions have been designed to (i) enable the Company to raise
the necessary capital to acquire the Properties and repay certain mortgage  debt
relating  thereto, (ii) provide a vehicle  for future acquisitions, (iii) enable
the Company to  comply with certain  requirements under the  federal income  tax
laws  and regulations relating to real estate investment trusts, (iv) facilitate
potential  securitized  mortgage  financings,  and  (v)  preserve  certain   tax
advantages  for certain  Arden Predecessors  and unaffiliated  participants. The
Formation Transactions are as follows:
 
    - The Company will sell shares of Common Stock in the Offering.
 
    - Pursuant to  separate option  agreements  (the "Option  Agreements"),  the
      Company  will  acquire for  cash from  certain Participants  the interests
      owned by such Participants  in certain of  the Arden Predecessor  entities
      and in certain of the Properties. The Company will pay approximately $26.8
      million from the net proceeds of the Offering for such interests.
 
    - The  Company will contribute  (i) the interests  in the Arden Predecessors
      and in the Properties acquired pursuant to the Option Agreements and  (ii)
      the   net  proceeds  from   the  Offering  (after   payment  of  the  cash
      consideration to certain Participants as described above) to the Operating
      Partnership in  exchange  for a  86.7%  general partner  interest  in  the
      Operating Partnership.
 
    - Pursuant   to   separate   contribution   agreements   (the  "Contribution
      Agreements"), the following additional contributions  will be made to  the
      Operating  Partnership  in  exchange  for  OP  Units  representing limited
      partner interests: (i) certain Participants will contribute the  remaining
      interests  in  the Arden  Predecessors and  in  certain of  the Properties
      (I.E., all interests not  acquired by the Company  pursuant to the  Option
      Agreements)  and  (ii)  Arden  will  contribute  certain  of  its  assets,
      including management contracts relating to  certain of the Properties  and
      the  contract rights to purchase  the Acquisition Properties (303 Glenoaks
      Blvd. and  12501  East Imperial  Highway).  The Participants  making  such
      contributions  (including Messrs. Ziman, Coleman and Gilbert) will receive
      an  aggregate  of  2,889,071  OP   Units,  with  an  estimated  value   of
      approximately  $57.8 million based on  the assumed initial public offering
      price of the Common Stock.
 
                                      F-12
<PAGE>
                               ARDEN REALTY, INC.
 
                     NOTES TO BALANCE SHEET -- (CONTINUED)
 
1.  ORGANIZATION (CONTINUED)
    - The Company, through the Operating Partnership, will borrow  approximately
      $104  million aggregate principal amount  (the "Mortgage Financing") which
      will be secured by cross-collateralized and cross-defaulted first mortgage
      liens on nine of the Properties (the "Mortgage Financing Properties").
 
    - Approximately $35 million  of the  net proceeds  of the  Offering and  the
      Mortgage  Financing will be used by  the Operating Partnership to purchase
      the Acquisition Properties.
 
    - Approximately $398 million  of the net  proceeds of the  Offering and  the
      Mortgage  Financing will  be used  by the  Operating Partnership  to repay
      certain  mortgage  debt  secured   by  the  Properties  and   indebtedness
      outstanding  under  lines  of  credit  to  be  assumed  by  the  Operating
      Partnership in the Formation Transactions.
 
    - The Company, through  the Operating  Partnership, will enter  into a  $100
      million Credit Facility.
 
    - The  transfer of the properties and  operating interests of Messrs. Ziman,
      Coleman, Gilbert and  their affiliates  to the  Operating Partnership  for
      cash or ownership units in the Operating Partnership will be accounted for
      at  the  historical  cost of  their  interests in  the  Arden Predecessors
      similar to a pooling of interests. All transfers by nonaffiliates will  be
      accounted  for  at  the  fair  value of  the  units  issued  and/  or cash
      consideration paid.
 
2.  COMMITMENTS AND CONTINGENCIES
    The Company will become a party to various legal actions resulting from  the
operating  activities  to be  transferred  to the  Operating  Partnership. These
actions are  incidental to  the  transferred business  and management  does  not
believe that these actions will have a material adverse effect on the Company.
 
    Pursuant  to  the  Operating  Partnership's  limited  partnership agreement,
beginning one  year after  consummation of  the Offering,  the OP  Units  issued
concurrently  with the Offering  are redeemable (at the  election of the holder)
for cash or, at  the option of  the Company, exchangeable  for shares of  Common
Stock of the Company on a one-for-one basis.
 
3.  RISKS AND UNCERTAINTIES
    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 revenue and expenses during the reporting
period. Actual results could differ from those estimates.
 
4.  INCOME TAXES
    After the Offering, the Company intends to make an election to be taxed as a
real  estate investment  trust ("REIT")  under Sections  586 through  860 of the
Internal Revenue Code. As a REIT, the  Company generally will not be subject  to
federal income tax if it distributes at least 95% of its taxable income for each
tax  year 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. Even if the Company qualifies for taxation as a REIT, the Company may
be  subject to state and local income taxes and to federal income tax and excise
tax on its undistributed income.
 
5.  STOCK INCENTIVE PLAN
    The Company intends to adopt a Stock Incentive Plan to provide incentives to
attract and retain officers, key employees and outside directors.
 
                                      F-13
<PAGE>
                               ARDEN REALTY, INC.
 
                     NOTES TO BALANCE SHEET -- (CONTINUED)
 
5.  STOCK INCENTIVE PLAN (CONTINUED)
    The Stock  Incentive Plan  will  be qualified  under  Rule 16b-3  under  the
Securities  Exchange  Act of  1934, as  amended  (the"Exchange Act").  The Stock
Incentive Plan will be  administered by the  Compensation Committee and  provide
for the granting of stock options, stock appreciation rights or restricted stock
with respect to up to 1,500,000 shares of Common Stock to executive or other key
employees of the Company. Stock options may be granted in the form of "incentive
stock  options," as defined in  Section 422 of the  Code, or non-statutory stock
options and are exercisable for up to 10 years following the date of grant.  The
exercise price of each option will be established by the Compensation Committee;
provided, however, that the price per share must be equal to or greater than the
fair market value of the Common Stock on the grant date.
 
    The   Stock  Incentive  Plan  also  provides   for  the  issuance  of  stock
appreciation rights which  will generally entitle  a holder to  receive cash  or
stock,  as determined  by the  Compensation Committee,  at the  time of exercise
equal to the difference between the exercise price and the fair market value  of
the  Common Stock. In addition, the Stock  Incentive Plan permits the Company to
issue shares of restricted stock to  executive or other key employees upon  such
terms and conditions as shall be determined by the Compensation Committee.
 
    During  1995  an  accounting  pronouncement  was  issued  by  the  Financial
Accounting Standards Board that applies  to the Company, Statement of  Financial
Accounting   Standards   ("SFAS")   No.   123,   "Accounting   for   Stock-Based
Compensation." This new standard  will become effective  for the Company's  1996
fiscal  year. SFAS No.  123 establishes a  fair value method  for accounting for
stock-based compensation, such as  option plans, but does  not require that  the
new  method  be  adopted.  The  Company  may  elect  to  continue  following the
methodology in APB Opinion No. 25,  "Accounting for Stock Issued to  Employees",
whereby  the  compensation expense  is measured  as  the difference  between the
exercise price of the option  and the stock price  on the measurement date  with
the  fair  value  of  options  disclosed  in  the  footnotes  in  the  financial
statements. SFAS  No. 123  is not  expected to  adversely affect  the  Company's
future reported results.
 
                                      F-14
<PAGE>
                         REPORT OF INDEPENDENT AUDITORS
 
To the Owners of the Arden Predecessors
 
    We  have  audited  the accompanying  combined  balance sheets  of  the Arden
Predecessors, as defined in Note  1, as of December 31,  1995 and 1994, and  the
related  combined statements  of operations, owners'  equity and  cash flows for
each of the three years in the  period ended December 31, 1995. Our audits  also
included  the financial statement schedule III, commercial office properties and
accumulated depreciation.  These  financial  statements  and  schedule  are  the
responsibility  of the management of  the Arden Predecessors. Our responsibility
is to express an opinion on these financial statements and schedule based on our
audits.
 
    We conducted  our  audits in  accordance  with generally  accepted  auditing
standards.  Those standards require that we plan and perform the audit 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, the combined financial statements referred to above  present
fairly,  in all material respects, the  combined financial position of the Arden
Predecessors as of December 31, 1995 and 1994, and the combined results of their
operations and  cash flows  for each  of the  three years  in the  period  ended
December  31, 1995, in conformity with generally accepted accounting principles.
Also, in our opinion, the related financial statement schedule, when  considered
in relation to the financial statements taken as a whole, presents fairly in all
material respects the information set forth therein.
 
                                          Ernst & Young LLP
 
Los Angeles, California
April 10, 1996
 
                                      F-15
<PAGE>
                               ARDEN PREDECESSORS
 
                            COMBINED BALANCE SHEETS
                                 (IN THOUSANDS)
 
                                     ASSETS
 
<TABLE>
<CAPTION>
                                                                                                 DECEMBER 31,
                                                                                             ---------------------
                                                                                                1995       1994
                                                                                 JUNE 30,    ----------  ---------
                                                                                   1996
                                                                                -----------
                                                                                (UNAUDITED)
<S>                                                                             <C>          <C>         <C>
Commercial office properties, net of accumulated depreciation of $6,248,
 $3,296 and $1,530, respectively..............................................   $ 254,749   $  160,874  $  34,977
Cash and cash equivalents.....................................................         913          790        611
Restricted cash...............................................................      17,334       12,249        600
Rents and other receivables...................................................       2,577        1,095         21
Deferred rents................................................................       2,996        1,778      1,106
Prepaid financing and leasing costs, net of accumulated amortization of $408,
 $421 and $112, respectively..................................................       1,659        1,359        746
Prepaid expenses and other assets.............................................       2,868        1,071        446
Investments in noncombined entities...........................................       3,069        3,163      7,583
                                                                                -----------  ----------  ---------
    Total assets..............................................................   $ 286,165   $  182,379  $  46,090
                                                                                -----------  ----------  ---------
                                                                                -----------  ----------  ---------
 
                                          LIABILITIES AND OWNERS' EQUITY
 
Mortgage loans payable........................................................   $ 263,492   $  167,638  $  32,196
Unsecured lines of credit.....................................................       2,467          813        748
Accounts payable and accrued expenses.........................................       4,726        3,398        897
Deferred interest.............................................................       5,318          884     --
Security deposits.............................................................       1,914        1,430        307
                                                                                -----------  ----------  ---------
    Total liabilities.........................................................     277,917      174,163     34,148
Minority interests............................................................         718          100         99
Owners' equity................................................................       7,530        8,116     11,843
                                                                                -----------  ----------  ---------
    Total liabilities and owners' equity......................................   $ 286,165   $  182,379  $  46,090
                                                                                -----------  ----------  ---------
                                                                                -----------  ----------  ---------
</TABLE>
 
                            See accompanying notes.
 
                                      F-16
<PAGE>
                               ARDEN PREDECESSORS
 
                       COMBINED STATEMENTS OF OPERATIONS
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                SIX MONTHS
                                                                   ENDED         FOR THE YEARS ENDED
                                                                 JUNE 30,            DECEMBER 31,
                                                              ---------------  ------------------------
                                                               1996     1995    1995     1994     1993
                                                              -------  ------  -------  -------  ------
                                                                (UNAUDITED)
<S>                                                           <C>      <C>     <C>      <C>      <C>
REVENUE
  Rental....................................................  $19,404  $2,822  $ 8,832  $ 5,157  $3,034
  Tenant reimbursements.....................................    1,425     177      403      217      35
  Parking...................................................    2,121     220      750      382     279
  Other.....................................................    1,521     649    1,707      796     314
                                                              -------  ------  -------  -------  ------
      Total revenue.........................................   24,471   3,868   11,692    6,552   3,662
                                                              -------  ------  -------  -------  ------
EXPENSES
  Property operating and maintenance........................    4,998     754    2,539    1,869   1,324
  Real estate taxes.........................................    1,291     138      502      272     107
  Insurance.................................................    1,503      42      279       50      49
  Ground rent...............................................      460    --         19    --       --
  General and administrative................................      830     684    1,377      689     386
  Interest..................................................   14,741   1,403    5,537    1,673     646
  Depreciation and amortization.............................    3,036     638    1,898    1,143     499
                                                              -------  ------  -------  -------  ------
      Total expenses........................................   26,859   3,659   12,151    5,696   3,011
                                                              -------  ------  -------  -------  ------
Equity in net (loss) income of noncombined entities.........      (94)    108     (116)     201       4
                                                              -------  ------  -------  -------  ------
(Loss) income before minority interests.....................   (2,482)    317     (575)   1,057     655
Minority interests..........................................      344      (7)      (1)       1    --
                                                              -------  ------  -------  -------  ------
Net (loss) income...........................................  $(2,138) $  310  $  (576) $ 1,058  $  655
                                                              -------  ------  -------  -------  ------
                                                              -------  ------  -------  -------  ------
</TABLE>
 
                            See accompanying notes.
 
                                      F-17
<PAGE>
                               ARDEN PREDECESSORS
 
                     COMBINED STATEMENTS OF OWNERS' EQUITY
               FOR THE SIX MONTHS ENDED JUNE 30, 1996 (UNAUDITED)
            AND FOR THE YEARS ENDED DECEMBER 31, 1995, 1994 AND 1993
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
Balance at January 1, 1993........................................................  $    (153)
<S>                                                                                 <C>
  Owners' contributions...........................................................      2,680
  Owners' distributions...........................................................       (460)
  Net income - 1993...............................................................        655
                                                                                    ---------
Balance at December 31, 1993......................................................      2,722
  Owners' contributions...........................................................      9,452
  Owners' distributions...........................................................     (1,389)
  Net income - 1994...............................................................      1,058
                                                                                    ---------
Balance at December 31, 1994......................................................     11,843
  Owners' contributions...........................................................      7,427
  Owners' distributions...........................................................    (10,578)
  Net (loss) - 1995...............................................................       (576)
                                                                                    ---------
Balance at December 31, 1995......................................................      8,116
  Owners' contributions (unaudited)...............................................      2,500
  Owners' distributions (unaudited)...............................................       (948)
  Net (loss) - six months ended June 30, 1996 (unaudited).........................     (2,138)
                                                                                    ---------
Balance at June 30, 1996 (unaudited)..............................................  $   7,530
                                                                                    ---------
                                                                                    ---------
</TABLE>
 
                            See accompanying notes.
 
                                      F-18
<PAGE>
                               ARDEN PREDECESSORS
 
                       COMBINED STATEMENTS OF CASH FLOWS
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                            SIX MONTHS      FOR THE YEARS ENDED DECEMBER
                                                                          ENDED JUNE 30,                31,
                                                                        ------------------  ----------------------------
                                                                          1996      1995      1995      1994      1993
                                                                        --------  --------  --------  --------  --------
                                                                           (UNAUDITED)
<S>                                                                     <C>       <C>       <C>       <C>       <C>
OPERATING ACTIVITIES
Net (loss) income.....................................................  $ (2,138) $    310  $   (576) $  1,058  $    655
Adjustments to reconcile net (loss) income to net cash provided by
  operating activities:
    Equity in net loss (income) of noncombined entities...............        94      (108)      116      (201)       (4)
    (Loss) income allocable to minority interests.....................      (344)        7         1        (1)    --
    Depreciation and amortization.....................................     3,036       638     1,898     1,143       499
    Amortization of loan costs and fees...............................       102        94       211        21         1
    (Increase) decrease in rents and other receivables................    (1,482)      (58)   (1,074)      198       (98)
    Increase in deferred rents........................................    (1,218)     (247)     (672)     (746)     (360)
    Increase in prepaid financing and leasing costs...................      (575)      (70)     (633)     (582)     (271)
    (Increase) decrease in prepaid expenses and other assets..........    (1,709)      266      (947)     (428)      (21)
    Increase (decrease) in accounts payable and accrued expenses......     1,328      (501)    2,501       267       582
    Increase in deferred interest.....................................     4,434        23       884     --        --
    Increase in security deposits.....................................       485       104     1,121       105       203
                                                                        --------  --------  --------  --------  --------
Net cash provided by operating activities.............................     2,013       458     2,830       834     1,186
                                                                        --------  --------  --------  --------  --------
INVESTING ACTIVITIES
Acquisitions and improvements to commercial office properties.........   (96,827)   (9,466) (127,663)  (10,622)  (25,885)
Decrease (increase) in investments in noncombined entities............     --        3,888     4,305    (7,299)      (80)
                                                                        --------  --------  --------  --------  --------
Net cash used in investing activities.................................   (96,827)   (5,578) (123,358)  (17,921)  (25,965)
                                                                        --------  --------  --------  --------  --------
FINANCING ACTIVITIES
Proceeds from mortgage loans..........................................   100,092    10,125   142,501     8,139    24,058
Repayments of mortgage loans..........................................    (4,238)      (30)   (7,060)    --        --
Proceeds from unsecured lines of credit...............................     3,657     1,316     3,310     1,240       298
Repayments of unsecured lines of credit...............................    (2,003)   (1,275)   (3,244)     (791)     (250)
(Increase) decrease in restricted cash................................    (5,085)   (1,113)  (11,649)       94      (694)
Contributions from minority interests.................................     1,000     --        --          100     --
Distributions to minority interests...................................       (38)    --        --        --        --
Owners' contributions.................................................     2,500     1,474     7,427     9,452     2,680
Owners' distributions.................................................      (948)   (5,947)  (10,578)   (1,389)     (460)
                                                                        --------  --------  --------  --------  --------
Net cash provided by financing activities.............................    94,937     4,550   120,707    16,845    25,632
                                                                        --------  --------  --------  --------  --------
Net increase (decrease) in cash and cash equivalents..................       123      (570)      179      (242)      853
Cash and cash equivalents at beginning of period......................       790       611       611       853     --
                                                                        --------  --------  --------  --------  --------
Cash and cash equivalents at end of period............................  $    913  $     41  $    790  $    611  $    853
                                                                        --------  --------  --------  --------  --------
                                                                        --------  --------  --------  --------  --------
SUPPLEMENTAL DISCLOSURE OF NONCASH TRANSACTIONS
Cash paid during the period for interest, net of interest
  capitalized.........................................................  $  9,640  $  1,367  $  4,022  $  1,547  $    521
                                                                        --------  --------  --------  --------  --------
                                                                        --------  --------  --------  --------  --------
</TABLE>
 
                            See accompanying notes.
 
                                      F-19
<PAGE>
                               ARDEN PREDECESSORS
                     NOTES TO COMBINED FINANCIAL STATEMENTS
 
1.  ORGANIZATION
    The  entities below  are currently  engaged in  owning, acquiring, managing,
leasing and  renovating office  properties in  Southern California.  Substantial
ownership  interests  in  the  entities  (the  "Arden  Predecessors")  that  own
interests in the properties  are held by Richard  Ziman, Victor Coleman,  Arthur
Gilbert  and  their affiliates  consisting of  related individuals  and entities
controlled by them.
 
    The partners  and  members of  the  Arden Predecessors,  which  collectively
represent   the  "Participants",  will,  concurrently  with  a  proposed  public
offering, enter  into  a series  of  transactions  with Arden  Realty,  Inc.,  a
Maryland  corporation, to  form a real  estate investment trust  (the "REIT") to
continue and  expand  the  business  of  the  Arden  Predecessors.  All  of  the
properties  owned by the entities (the  "Properties") have been managed by Arden
Realty Group, Inc.,  a California  corporation, since their  acquisition by  the
Arden Predecessors.
 
    The properties and entities are all managed by Messrs. Ziman and Coleman. In
connection  with the proposed  offering, in those  instances where the financial
interests held by Messrs. Ziman, Coleman, Gilbert and their affiliates are  also
controlling  interests,  the entities  have  been combined  in  the accompanying
financial statements. Minority interests have  been recorded for those  entities
that  the  affiliated  Participants  control  but  are  not  wholly-owned. Where
controlling interests  are  not  held  by  these  affiliated  Participants,  the
entities  are  accounted for  as investments  in noncombined  entities utilizing
equity accounting. Although the affiliated Participants own a 77.5% interest  in
5000  Spring Associates Tenancy in Common they  do not have the unilateral right
to refinance the debt on the property. As a result, the affiliated  Participants
have accounted for this investment utilizing equity accounting.
 
   
<TABLE>
<CAPTION>
                                                  PREDECESSORS
- -----------------------------------------------------------------------------------------------------------------
              ENTITY NAME                          PROPERTY NAME                    CITY         ACQUISITION DATE
- ---------------------------------------  ----------------------------------  ------------------  ----------------
<S>                                      <C>                                 <C>                 <C>
COMBINED ENTITIES
- -----------------------------------------------------------------------------------------------
Arden Realty Group, Inc., a California
 corporation                             Operating Management Company                --                 --
Century Center Tenancy in Common         Century Park Center                 Los Angeles         March 1993
1950 Sawtelle Associates, L.P.           1950 Sawtelle                       Los Angeles         June 1995
Arden LAOP IV, LLC                       70 South Lake                       Pasadena            November 1995
                                         New Wilshire                        Los Angeles         November 1995
                                         Calabasas Commerce Center           Calabasas           November 1995
                                         Westwood Terrace                    Los Angeles         November 1995
                                         Skyview Center                      Los Angeles         November 1995
                                         5601 Lindero Canyon                 Westlake Village    March 1994
                                         4811 Airport Plaza Drive            Long Beach          November 1995
                                         4900/10 Airport Plaza Drive         Long Beach          November 1995
Arden LAOP V, LLC (Note 9)               5832 Bolsa                          Huntington Beach    February 1996
                                         400 Corporate Pointe                Culver City         February 1996
                                         9665 Wilshire                       Beverly Hills       February 1996
                                         Imperial Bank Tower                 San Diego           February 1996
Arden Broadway Associates, LLC           100 West Broadway                   Long Beach          July 1996
INVESTMENTS IN NONCOMBINED ENTITIES
- -----------------------------------------------------------------------------------------------
Beverly Ventura Associates, L.P.         Beverly Atrium                      Beverly Hills       December 1993
                                         Woodland Hills Financial            Woodland Hills      December 1993
Bristol Encino Associates, LLC           Bristol Plaza                       Culver City         August 1994
                                         16000 Ventura Blvd.                 Encino              March 1995
222 Harbor Associates, LLC               Anaheim City Centre                 Anaheim             November 1994
                                         425 West Broadway                   Glendale            December 1994
5000 Spring Associates Tenancy in
 Common                                  5000 East Spring                    Long Beach          December 1994
</TABLE>
    
 
                                      F-20
<PAGE>
                               ARDEN PREDECESSORS
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
 
1.  ORGANIZATION (CONTINUED)
 
<TABLE>
<CAPTION>
                                                  PREDECESSORS
- -----------------------------------------------------------------------------------------------------------------
              ENTITY NAME                          PROPERTY NAME                    CITY         ACQUISITION DATE
- ---------------------------------------  ----------------------------------  ------------------  ----------------
REIT ACQUISITION PROPERTIES
- -----------------------------------------------------------------------------------------------
<S>                                      <C>                                 <C>                 <C>
- --                                       303 Glenoaks Blvd.                  Burbank             To be acquired
- --                                       12501 East Imperial Highway         Norwalk             To be acquired
</TABLE>
 
    All  significant balances  and transactions  between the  Arden Predecessors
have been eliminated in the combined financial statements.
 
PROPOSED TRANSACTIONS
 
    Concurrently with  the consummation  of an  initial public  offering of  the
REIT's Common Stock (the "Offering"), which is expected to be completed in 1996,
the  REIT and a newly formed  limited partnership (the "Operating Partnership"),
together with the  Participants will  engage in  certain formation  transactions
(the  "Formation Transactions"). The Formation  Transactions are designed to (i)
enable the REIT  to raise the  necessary capital to  acquire the Properties  and
repay  certain mortgage debt relating thereto, (ii) provide a vehicle for future
acquisitions, (iii) enable the  REIT to comply  with certain requirements  under
the  federal income tax laws and  regulations relating to real estate investment
trusts, (iv)  facilitate  potential  securitized  mortgage  financings  and  (v)
preserve certain tax advantages for certain Participants.
 
    The  operations  of  the  REIT  will be  carried  on  primarily  through the
Operating Partnership and its subsidiaries in  order to assist the REIT and  the
Participants in forming the REIT under the Internal Revenue Code of 1986.
 
    The  REIT will be the sole general  partner in the Operating Partnership and
the Participants will  transfer their  property and operating  interests in  the
Arden  Predecessors  in  exchange  for  limited  partnership  interests  in  the
Operating Partnership and/or cash.
 
    The transfer of  the properties  and operating interests  of Messrs.  Ziman,
Coleman,  Gilbert and their affiliates to  the Operating Partnership for cash or
ownership units  in the  Operating  Partnership will  be  accounted for  at  the
historical  cost  of their  interests  in the  Arden  Predecessors similar  to a
pooling of interests. All  transfers by nonaffiliates will  be accounted for  at
the fair value of the ownership units issued and/or cash consideration paid.
 
2.  SUMMARY OF OTHER SIGNIFICANT ACCOUNTING POLICIES
 
RISKS AND UNCERTAINTIES
 
    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.
 
COMMERCIAL OFFICE PROPERTIES AND FURNITURE, FIXTURES AND EQUIPMENT
 
    The properties are  recorded at cost  less accumulated depreciation.  During
1995, the Arden Predecessors adopted the new accounting pronouncement, Statement
of  Financial  Accounting  Standards  ("SFAS")  No.  121,  "Accounting  for  the
Impairment of Long-Lived Assets  and for Long-Lived Assets  to be Disposed  of."
Under this standard, if impairment conditions exist, the Arden Predecessors make
an assessment of the recoverability of the carrying amounts of the properties by
estimating  the future undiscounted  cash flows, excluding  interest charges. If
the  carrying  amount  exceeds  the  aggregate  future  cash  flows,  the  Arden
Predecessors  would  recognize an  impairment loss  to  the extent  the carrying
amount exceeds the fair value of
 
                                      F-21
<PAGE>
                               ARDEN PREDECESSORS
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
 
2.  SUMMARY OF OTHER SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
the property.  Any long-lived  assets to  be disposed  of are  to be  valued  at
estimated  fair value less costs to sell. Based on such periodic assessments, no
impairments have been determined and, therefore, no real estate carrying amounts
have been adjusted.
 
    Repairs  and  maintenance  are   expensed  as  incurred.  Replacements   and
betterments  in  excess  of  $500 are  capitalized  and  depreciated  over their
estimated useful lives.
 
    Depreciation is calculated  using the  straight-line method  and forty  year
lives  for buildings and ten year  lives for building improvements. Amortization
of tenant improvements  is calculated  using the straight-line  method over  the
estimated term of the related lease.
 
CASH EQUIVALENTS
 
    Cash   equivalents  consist  of  highly  liquid  investments  with  original
maturities of three months or less when acquired.
 
RESTRICTED CASH
 
    Restricted cash  consists  of cash  held  as collateral  to  provide  credit
enhancement  for certain  mortgage loans payable  and cash  reserves for capital
expenditures, tenant  improvements, security  deposits and  property taxes.  All
restricted  cash is  controlled directly or  indirectly by  the related mortgage
lenders.
 
PREPAID COSTS
 
    Prepaid leasing costs are amortized on  a straight-line basis over the  term
of the related lease.
 
    Fees  and costs incurred in obtaining long-term financing are amortized over
the terms of the related loan agreements.
 
REVENUE RECOGNITION
 
    Minimum rent, including  rental abatements and  contractual fixed  increases
attributable  to operating leases,  is recognized on  a straight-line basis over
the term of the related  lease. Amounts expected to  be received in later  years
are  included in deferred rents. Property operating cost reimbursements due from
tenants for common  area maintenance,  real estate taxes  and other  recoverable
costs are recognized in the period the expenses are incurred.
 
FAIR VALUE OF FINANCIAL INSTRUMENTS
 
    The  mortgage loans payable  of the Arden  Predecessors consist primarily of
mortgage loans with loan to value ratios in excess of conforming loans generally
offered by financial institutions. The loans provide for variable indexed  rates
and,   in  most  cases,   significant  additional  interest   due  at  maturity.
Accordingly, management believes it  is not practical  to determine fair  values
due  to  the  lack  of  availability of  current  market  information  on terms,
including information  on appropriate  discount rates  for computing  discounted
cash  flows, of  similar financial  instruments. Other  than the  mortgage loans
payable, the Arden Predecessors believe the carrying amounts of their  financial
instruments approximate their fair values.
 
INCOME TAXES
 
    The  combined and noncombined  entities that make  up the Arden Predecessors
consist  of  a  Subchapter  S  corporation,  limited  liability  companies   and
partnerships.  Taxable income  is recorded  on the  separate tax  returns of the
membership unit holders and individual  partners and, accordingly, no  provision
for income taxes has been recorded in the accompanying financial statements.
 
PER SHARE DATA
 
    Per  share data  is not relevant  since the Arden  Predecessors represents a
presentation of the operations of a group of companies and partnerships.
 
                                      F-22
<PAGE>
                               ARDEN PREDECESSORS
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
 
2.  SUMMARY OF OTHER SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
UNAUDITED INTERIM STATEMENTS
 
    The combined financial statements as of June 30, 1996 and for the six months
ended June 30, 1996 and 1995 are  unaudited. In the opinion of management,  such
financial  statements reflect all adjustments  necessary for a fair presentation
of the results of the respective interim periods. All such adjustments are of  a
normal, recurring nature.
 
3.  COMMERCIAL OFFICE PROPERTIES
    The  commercial  office properties  were  acquired from  nonaffiliated third
parties and  consist of  office  buildings and  related parking  facilities,  as
follows:
 
<TABLE>
<CAPTION>
                                                                             DECEMBER 31,
                                                                         ---------------------
                                                                            1995       1994
                                                                         ----------  ---------
                                                                            (IN THOUSANDS)
<S>                                                                      <C>         <C>
Land...................................................................  $   24,216  $   9,789
Buildings..............................................................     125,252     23,313
Building improvements..................................................      12,896      1,358
Tenant improvements....................................................       1,806      2,047
                                                                         ----------  ---------
                                                                            164,170     36,507
Accumulated depreciation...............................................      (3,296)    (1,530)
                                                                         ----------  ---------
                                                                         $  160,874  $  34,997
                                                                         ----------  ---------
                                                                         ----------  ---------
</TABLE>
 
    The  Arden Predecessors capitalize  interest and taxes  related to buildings
under construction and renovation, including tenant improvements, to the  extent
such  assets qualify for capitalization.  Total interest capitalized was $8,000,
$265,000, and $319,000  for the years  ended December 31,  1995, 1994 and  1993,
respectively.
 
    All commercial office properties are encumbered by mortgages (Note 5).
 
    Office  space in the  properties is generally leased  to tenants under lease
terms which provide for the tenants  to pay for increases in operating  expenses
in excess of specified amounts.
 
    Noncancelable  operating leases with tenants expire on various dates through
2011. The future minimum lease payments to be received under leases existing  as
of December 31, 1995, are as follows:
 
<TABLE>
<S>                                                      <C>
1996...................................................  $41,928,000
1997...................................................  37,636,000
1998...................................................  31,743,000
1999...................................................  28,054,000
2000...................................................  23,069,000
Thereafter.............................................  64,872,000
</TABLE>
 
    The  above future minimum  lease payments do  not include specified payments
for tenant reimbursements of operating expenses.
 
    The Arden Predecessors lease  the land underlying  the office buildings  and
parking  structures of 4811 Airport Plaza  Drive and 4900/10 Airport Plaza Drive
from the city of Long Beach.
 
                                      F-23
<PAGE>
                               ARDEN PREDECESSORS
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
 
3.  COMMERCIAL OFFICE PROPERTIES (CONTINUED)
    Future minimum  ground  lease payments  due  under existing  ground  leases,
including  properties acquired subsequent to December  31, 1995 (Note 8), are as
follows:
 
<TABLE>
<S>                                                      <C>
1996...................................................  $1,294,000
1997...................................................   1,297,000
1998...................................................   1,297,000
1999...................................................   1,340,000
2000...................................................     942,000
Thereafter.............................................  60,307,000
</TABLE>
 
4.  INVESTMENTS IN NONCOMBINED ENTITIES
    The following are  the Arden Predecessors'  investments in various  entities
which  own commercial office properties in which Messrs. Ziman, Coleman, Gilbert
and  their  affiliates  do  not  own  controlling  financial  interests.   These
investments  are accounted for utilizing the  equity method of accounting. Under
such accounting method, the net equity  investment of the Arden Predecessors  is
reflected  on  the  combined  balance sheets,  and  the  combined  statements of
operations include the Arden Predecessors' share of net income or loss from  the
entities. The Arden Predecessors' stated ownership interest in each entity is as
follows:
 
<TABLE>
<CAPTION>
                                                                             ARDEN PREDECESSORS'
ENTITY                                                                           OWNERSHIP %
- --------------------------------------------------------------------------  ---------------------
<S>                                                                         <C>
Bristol Encino Associates, LLC............................................            20.9%
222 Harbor Associates, LLC................................................            26.3%
Beverly Ventura Associates, L.P...........................................            50.0%
5000 Spring Associates Tenancy in Common..................................            77.5%
</TABLE>
 
    Condensed  combined balance  sheets and  operating information  is presented
below for all noncombined entities.
 
           CONDENSED COMBINED BALANCE SHEETS OF NONCOMBINED ENTITIES
 
<TABLE>
<CAPTION>
                                                                              DECEMBER 31,
                                                                          --------------------
                                                                            1995       1994
                                                                          ---------  ---------
                                                              JUNE 30,
                                                                1996
                                                             -----------
                                                             (UNAUDITED)
                                                                      (IN THOUSANDS)
<S>                                                          <C>          <C>        <C>
Assets:
  Commercial office properties, net........................   $  91,555   $  91,208  $  71,158
  Other assets.............................................       6,273       7,220      3,389
                                                             -----------  ---------  ---------
    Total assets...........................................   $  97,828   $  98,428  $  74,547
                                                             -----------  ---------  ---------
                                                             -----------  ---------  ---------
Liabilities and owners' equity:
  Mortgage loans payable...................................   $  86,420   $  85,545  $  61,487
  Other liabilities........................................       2,506       3,248      1,445
  Arden Predecessors' equity...............................       3,069       3,163      7,583
  Other owners' equity.....................................       5,833       6,472      4,032
                                                             -----------  ---------  ---------
    Total liabilities and owners' equity...................   $  97,828   $  98,428  $  74,547
                                                             -----------  ---------  ---------
                                                             -----------  ---------  ---------
</TABLE>
 
                                      F-24
<PAGE>
                               ARDEN PREDECESSORS
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
 
4.  INVESTMENTS IN NONCOMBINED ENTITIES (CONTINUED)
      CONDENSED COMBINED STATEMENTS OF OPERATIONS OF NONCOMBINED ENTITIES
 
<TABLE>
<CAPTION>
                                                  SIX MONTHS ENDED
                                                      JUNE 30,            YEAR ENDED DECEMBER 31,
                                                --------------------  -------------------------------
                                                  1996       1995       1995       1994       1993
                                                ---------  ---------  ---------  ---------  ---------
                                                    (UNAUDITED)    (IN THOUSANDS)
<S>                                             <C>        <C>        <C>        <C>        <C>
Revenue.......................................  $   8,985  $   8,355  $  17,720  $   7,736  $     132
                                                ---------  ---------  ---------  ---------  ---------
Expenses:
  Property operating expenses.................      3,728      3,369      7,758      3,331         36
  Interest....................................      4,317      3,777      8,243      3,436         26
  Depreciation and amortization...............      1,673      1,257      2,475      1,041         30
                                                ---------  ---------  ---------  ---------  ---------
    Total expenses............................      9,718      8,403     18,476      7,808         92
                                                ---------  ---------  ---------  ---------  ---------
    Net (loss) income.........................  $    (733) $     (48) $    (756) $     (72) $      40
                                                ---------  ---------  ---------  ---------  ---------
                                                ---------  ---------  ---------  ---------  ---------
</TABLE>
 
   
    In 1994,  the noncombined  entities incurred  losses totalling  $466,000  on
Beverly  Atrium and Woodland Hills Financial as a result of an earthquake in Los
Angeles, California. This amount is included in property operating expenses.
    
 
    The significant accounting  policies used  by the  noncombined entities  are
similar to those used by the Arden Predecessors.
 
COMMERCIAL OFFICE PROPERTIES OF NONCOMBINED ENTITIES
 
    The  commercial office  properties consist  of office  buildings and related
parking facilities, as follows:
 
<TABLE>
<CAPTION>
                                                                              DECEMBER 31,
                                                                          --------------------
                                                                            1995       1994
                                                                          ---------  ---------
                                                                             (IN THOUSANDS)
<S>                                                                       <C>        <C>
Land....................................................................  $  16,229  $  12,709
Buildings...............................................................     73,416     58,546
Building Improvements...................................................      1,960         10
Tenant Improvements.....................................................      2,957        939
                                                                          ---------  ---------
                                                                             94,562     72,204
Accumulated Depreciation................................................     (3,354)    (1,046)
                                                                          ---------  ---------
                                                                          $  91,208  $  71,158
                                                                          ---------  ---------
                                                                          ---------  ---------
</TABLE>
 
MORTGAGE LOANS PAYABLE OF NONCOMBINED ENTITIES
 
<TABLE>
<CAPTION>
                                                                                        DECEMBER 31,
                                                                                ----------------------------
                                                                                    1995           1994
                                                                                -------------  -------------
<S>                                                                             <C>            <C>
MORTGAGE LOANS DUE TO MORTGAGE BANKERS
Two  mortgage  loans,  dated  December   23,  1993,  secured  by  two   cross-
collateralized  first trust  deeds on real  property, bearing  interest at the
lender's composite commercial rate, which was 5.53% at December 31, 1995, plus
a margin  of 3.25%.  Interest  only payments  are  due monthly  and  principal
payments  are due periodically based on a portion of operating cash flows from
the property. Unpaid principal and interest of $22,283,000 is due on  December
31, 1998. The remaining balance of $15,571,000 is due on December 31, 2000.     $  37,854,000  $  36,747,000
</TABLE>
 
                                      F-25
<PAGE>
                               ARDEN PREDECESSORS
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
 
4.  INVESTMENTS IN NONCOMBINED ENTITIES (CONTINUED)
 
<TABLE>
<CAPTION>
                                                                                        DECEMBER 31,
                                                                                ----------------------------
                                                                                    1995           1994
                                                                                -------------  -------------
<S>                                                                             <C>            <C>
MORTGAGE LOANS DUE TO BANKS
Two  mortgage loans, dated March 15, 1995, secured by two cross-collateralized
first trust  deeds on  real property,  bearing interest  at LIBOR  plus  4.5%.
Interest  only payments are due monthly, and all principal and interest is due
on March  15,  1997. This  loan  has  an additional  interest  requirement  of
$434,000  or approximately  2.0% of the  principal balance to  be deferred and
paid at maturity. At December 31, 1995, the borrower had recorded $172,000  of
additional  interest, resulting  in an effective  interest rate  of 11.5%. The
borrower is required to maintain a debt service coverage ratio, as defined  in
the Loan Agreement, of 1.20:1.0.                                                   22,351,000       --
A  mortgage loan,  dated December  23, 1994,  secured by  a first  trust deed,
$12.09 million  of the  balance bearing  interest  at LIBOR  plus 3.75%  or  a
periodic  fixed rate,  the remaining $2.79  million bearing  interest at LIBOR
plus 4.0%  at the  option of  the  borrower. Interest  only payments  are  due
monthly,  and the  principal and  all unpaid interest  is due  on December 23,
1997.                                                                              14,880,000     14,880,000
A mortgage  loan, dated  December 14,  1994, secured  by a  first trust  deed,
bearing  interest at  the Eleventh District  Monthly Weighted  Average Cost of
Funds Rate, as  calculated by  the Federal Home  Loan Bank  of San  Francisco,
which  was 5.059% at December 31, 1995, plus 3.75%. Interest only payments are
due monthly, and principal and all unpaid interest are due on January 1, 2005.     10,460,000      9,860,000
                                                                                -------------  -------------
    Total Mortgage Loans Payable                                                $  85,545,000  $  61,487,000
                                                                                -------------  -------------
                                                                                -------------  -------------
</TABLE>
 
5.  MORTGAGE LOANS PAYABLE AND UNSECURED LINES OF CREDIT
 
<TABLE>
<CAPTION>
                                                                                       DECEMBER 31,
                                                                               -----------------------------
                                                                                    1995           1994
                                                                               --------------  -------------
<S>                                                                            <C>             <C>
MORTGAGE LOANS DUE TO LEHMAN CAPITAL, A DIVISION OF LEHMAN BROTHERS  HOLDINGS
INC. (LEHMAN)
A  mortgage loan, dated November 20, 1995, secured by seven first trust deeds
and one second trust deed on real property, bearing interest at LIBOR (with a
floor on LIBOR  of 5.5%) plus  3.0%. Interest  only payments are  to be  made
monthly  and all principal and  unpaid interest is due  on November 20, 1998.
The loan agreement provides for additional  interest to be deferred and  paid
at  maturity in the amount of  $10,560,000 (Tier I Additional Interest) which
increases the day after each of the first and second anniversary dates of the
loan by $2,640,000, or 2% of the original principal balance (Tier II and Tier
III Additional  Interest,  respectively). At  December  31, 1995,  the  Arden
Predecessors  had recorded $586,000  of additional interest,  resulting in an
effective interest  rate  of  approximately 11.3%.  Effective  on  the  first
anniversary date of the loan, the Arden Predecessors are required to maintain
a debt service coverage ratio of 1.25:1.0.                                     $  132,000,000  $   6,741,000
</TABLE>
 
                                      F-26
<PAGE>
                               ARDEN PREDECESSORS
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
 
5.  MORTGAGE LOANS PAYABLE AND UNSECURED LINES OF CREDIT (CONTINUED)
 
   
<TABLE>
<CAPTION>
                                                                                       DECEMBER 31,
                                                                               -----------------------------
                                                                                    1995           1994
                                                                               --------------  -------------
<S>                                                                            <C>             <C>
A  mortgage loan, dated June 13, 1995, secured  by a first trust deed on real
property, bearing interest at LIBOR plus 4.5%. Interest only payments are due
monthly and all principal and  unpaid interest is due  on June 13, 1997.  The
loan  agreement provides for additional interest of $1,100,000 to be deferred
and paid at maturity  (Tier I Additional Interest).  If the loan is  extended
for  an  additional  twelve months,  the  Arden  Predecessors are  to  pay an
additional interest amount of $600,000  (Tier II Additional Interest). As  of
December 31, 1995, the Arden Predecessors had recorded $298,000 of additional
interest,  resulting in an effective interest rate of 15.6%. Effective on the
first anniversary date of  the loan, the Arden  Predecessors are required  to
maintain a debt service coverage ratio 1.15:1.0.                                   10,200,000       --
 
MORTGAGE LOANS DUE TO BANKS
A  mortgage loan, dated March 1, 1993, secured  by a first trust deed on real
property, bearing interest, at the Arden Predecessor's option, at LIBOR  plus
a margin of 1.0%, the treasury rate plus a margin of 1.75%, or the Prime Rate
plus  0.25%.  Interest only  payments are  due  monthly. Monthly  payments of
principal begin March 1, 1996. The mortgage loan matures March 1, 2003.            25,438,000     25,455,000
                                                                               --------------  -------------
    Total mortgage loans payable                                               $  167,638,000  $  32,196,000
                                                                               --------------  -------------
                                                                               --------------  -------------
</TABLE>
    
 
    The LIBOR rate was 5.72% at December 31, 1995.
 
    One mortgage loan provides  for additional funds to  be drawn for  qualified
and  approved tenant improvements, leasing commissions and capital improvements.
The amount of funds available for disbursement from this lending institution  is
$3,500,000.  As of December 31,  1995, total funds drawn  for these purposes was
$2,713,000, and the undisbursed portion was $787,000.
 
    The Arden Predecessors have  three unsecured lines of  credit, with a  total
commitment  of $2,713,000,  from two  domestic banks.  The aggregate outstanding
balance was $813,000  at December  31, 1995. The  lines accrue  interest at  the
Prime Rate. The undisbursed portion at December 31, 1995 was $1,900,000.
 
    As  of December 31, 1995, the  scheduled principal payments for the mortgage
loans payable and unsecured lines of credit are as follows:
 
<TABLE>
<S>                                                     <C>
1996                                                    $ 1,490,000
1997..................................................   10,975,000
1998..................................................  132,836,000
1999..................................................      901,000
2000..................................................      734,000
Thereafter............................................   21,515,000
                                                        -----------
                                                        $168,451,000
                                                        -----------
                                                        -----------
</TABLE>
 
                                      F-27
<PAGE>
                               ARDEN PREDECESSORS
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
 
6.  COMMITMENTS AND CONTINGENCIES
 
CONCENTRATION OF CREDIT RISK
 
    The Arden Predecessors maintain their cash and cash equivalents at financial
institutions. The  combined account  balances at  each institution  periodically
exceed  FDIC insurance coverage, and,  as a result, there  is a concentration of
credit risk related to amounts on deposit in excess of FDIC insurance  coverage.
Management of the Arden Predecessors believes that the risk is not significant.
 
OFFICE RENT EXPENSE
 
    The  Arden Predecessors  lease office space  for its  corporate offices. The
future minimum rental payments due under the terms of the lease are $123,000 for
each of the next  four years and  $62,000 in the final  year. The lease  expires
June 30, 2000. The Arden Predecessors have the right to renew the lease for two,
one-year terms prior to expiration of the initial lease term.
 
LITIGATION
 
    Management  of  the  Arden  Predecessors  does  not  believe  there  is  any
litigation  threatened  against  the  Arden  Predecessors  other  than   routine
litigation  arising out  of the  ordinary course of  business, some  of which is
expected to be covered by liability insurance  and all of which is not  expected
to  have a material adverse  effect on the combined  financial statements of the
Arden Predecessors.
 
7.  RELATED PARTY TRANSACTIONS
    Included in  other  income are  management  fees of  $95,000,  $213,000  and
$137,000  for  1995,  1994,  and  1993,  respectively,  from  various affiliated
partnerships.
 
    Included in accounts receivable are $28,000, $58,000 and $56,000 at December
31, 1995, 1994, and 1993, respectively, from various affiliated partnerships.
 
   
8.  EARTHQUAKE LOSSES
    
   
    During 1994, the  Arden Predecessors incurred  losses totalling $136,000  on
Century  Park Center as  a result of  an earthquake in  Los Angeles, California.
This amount is included in property operating and maintenance expenses.
    
 
   
9.  PROPERTY ACQUISITIONS
    
    Subsequent to December 31, 1995, the Arden Predecessors purchased additional
properties from nonaffiliated third parties  for an aggregate purchase price  of
$94,665,000. The Participants incurred $100,000,000 of debt from an affiliate of
Lehman Brothers, Inc. as a result of financing the purchase, of which $5,335,000
was  retained in a restricted  cash account to be  used for tenant improvements,
capital improvements and leasing commissions.
 
                                      F-28
<PAGE>
                               ARDEN PREDECESSORS
                                  SCHEDULE III
           COMMERCIAL OFFICE PROPERTIES AND ACCUMULATED DEPRECIATION
                               DECEMBER 31, 1995
                    (IN THOUSANDS, EXCEPT SQUARE FOOT DATA)
<TABLE>
<CAPTION>
                                                                                            COSTS
                                                                                         CAPTIALIZED
                                                                 INITIAL COSTS          SUBSEQUENT TO          TOTAL COSTS
                                                            ------------------------     ACQUISITION     ------------------------
                                                  SQUARE               BUILDINGS AND  -----------------             BUILDINGS AND
COMBINED ENTITIES                                 FOOTAGE     LAND     IMPROVEMENTS   IMPROVEMENTS (4)     LAND     IMPROVEMENTS
- -----------------------------------------------  ---------  ---------  -------------  -----------------  ---------  -------------
<S>                                              <C>        <C>        <C>            <C>                <C>        <C>
PROPERTY NAME
- -----------------------------------------------
Century Park Center............................    243,404  $   7,189    $  16,742        $   4,472      $   7,189    $  21,214
1950 Sawtelle..................................    103,772      1,988        7,263              107          1,988        7,370
70 South Lake..................................    100,133      1,360        9,097           --              1,360        9,097
New Wilshire...................................    202,704      1,200       19,902                4          1,200       19,906
Calabasas Commerce Center......................    123,121      1,262        9,725           --              1,262        9,725
Westwood Terrace...............................    135,943      2,103       16,850               37          2,103       16,887
Skyview Center.................................    391,675      6,514       33,701           --              6,514       33,701
5601 Lindero Canyon............................    105,830      2,600        6,067            1,535          2,600        7,602
4811 Airport Plaza Drive and 4900/10 Airport
 Plaza Drive...................................    272,013     --           14,452           --             --           14,452
                                                 ---------  ---------  -------------        -------      ---------  -------------
                                                 1,678,595  $  24,216    $ 133,799        $   6,155      $  24,216    $ 139,954
                                                 ---------  ---------  -------------        -------      ---------  -------------
                                                 ---------  ---------  -------------        -------      ---------  -------------
NONCOMBINED ENTITIES
- -----------------------------------------------
PROPERTY NAME
- -----------------------------------------------
Beverly Atrium.................................     61,314  $   4,127    $  11,513        $     600      $   4,127    $  12,113
Woodland Hills Financial.......................    224,955      6,566       14,754            1,715          6,566       16,469
Bristol Plaza..................................     84,014      1,820        3,380              185          1,820        3,565
16000 Ventura Blvd.............................    174,841      1,700       17,189              571          1,700       17,760
Anaheim City Centre............................    175,391        515       11,199              240            515       11,439
425 West Broadway..............................     71,589      1,500        4,436              187          1,500        4,623
5000 East Spring...............................    163,358     --           11,658              707         --           12,365
                                                 ---------  ---------  -------------        -------      ---------  -------------
                                                   955,462  $  16,228    $  74,129        $   4,205      $  16,228    $  78,334
                                                 ---------  ---------  -------------        -------      ---------  -------------
                                                 ---------  ---------  -------------        -------      ---------  -------------
 
<CAPTION>
 
                                                               ACCUMULATED                       YEAR
COMBINED ENTITIES                                  TOTAL    DEPRECIATION (1)   ENCUMBRANCES      BUILT
- -----------------------------------------------  ---------  -----------------  -------------     -----
<S>                                              <C>        <C>                <C>            <C>
PROPERTY NAME
- -----------------------------------------------
Century Park Center............................  $  28,403      $   2,357        $  25,438          1972
1950 Sawtelle..................................      9,358            131           10,200          1988
70 South Lake..................................     10,457             33           11,000(3)       1982
New Wilshire...................................     21,106             72           22,000(3)       1989
Calabasas Commerce Center......................     10,987             42           11,800(3)       1990
Westwood Terrace...............................     18,990             67           21,000(3)       1988
Skyview Center.................................     40,215            128           41,200(3)       1981
5601 Lindero Canyon............................     10,202            427           10,400(3)       1989
4811 Airport Plaza Drive and 4900/10 Airport
 Plaza Drive...................................     14,452             39           14,600(3)       1987
                                                 ---------         ------      -------------
                                                 $ 164,170      $   3,296        $ 167,638
                                                 ---------         ------      -------------
                                                 ---------         ------      -------------
NONCOMBINED ENTITIES
- -----------------------------------------------
PROPERTY NAME
- -----------------------------------------------
Beverly Atrium.................................  $  16,240      $     790        $  15,570(2)       1989
Woodland Hills Financial.......................     23,035          1,177           22,284(2)       1972
Bristol Plaza..................................      5,385            114            5,200          1982
16000 Ventura Blvd.............................     19,460            313           17,151          1980
Anaheim City Centre............................     11,954            437            9,880          1986
425 West Broadway..............................      6,123            163            5,000          1984
5000 East Spring...............................     12,365            360           10,460          1989
                                                 ---------         ------      -------------
                                                 $  94,562      $   3,354        $  85,545
                                                 ---------         ------      -------------
                                                 ---------         ------      -------------
</TABLE>
 
(1) The depreciable life for buildings and improvements ranges from ten to forty
    years.
 
(2) Each of these properties is collateral for both loans.
 
(3) All  of  these  properties  are collateral  for  a  mortgage  loan  totaling
    $132,000,000.  The encumbrance allocated to  an individual property is based
    on the related individual release price.
 
(4) Includes total capitalized interest of $628,000.
 
                                      F-29
<PAGE>
    A   summary  of  activity  of  combined  commercial  office  properties  and
accumulated depreciation is as follows:
<TABLE>
<CAPTION>
                                                                          COMMERCIAL OFFICE PROPERTIES
                                                                        --------------------------------
                                                                                  DECEMBER 31,
                                                                        --------------------------------
                                                                           1995       1994       1993
                                                                        ----------  ---------  ---------
<S>                                                                     <C>         <C>        <C>
Balance at beginning of period........................................  $   36,507  $  25,885  $  --
Improvements..........................................................       2,245      1,955      1,954
Acquisition of land, building and improvements........................     125,418      8,667     23,931
                                                                        ----------  ---------  ---------
Balance at end of period..............................................  $  164,170  $  36,507  $  25,885
                                                                        ----------  ---------  ---------
                                                                        ----------  ---------  ---------
 
<CAPTION>
 
                                                                            ACCUMULATED DEPRECIATION
                                                                        --------------------------------
                                                                                  DECEMBER 31,
                                                                        --------------------------------
                                                                           1995       1994       1993
                                                                        ----------  ---------  ---------
<S>                                                                     <C>         <C>        <C>        <C>
Balance at beginning of period...............................................  $   1,530  $     481  $  --
Depreciation expense.........................................................      1,766      1,049        481
                                                                               ---------  ---------  ---------
Balance at end of period.....................................................  $   3,296  $   1,530  $     481
                                                                               ---------  ---------  ---------
                                                                               ---------  ---------  ---------
</TABLE>
 
                                      F-30
<PAGE>
                         REPORT OF INDEPENDENT AUDITORS
 
To the Board of Directors
Arden Realty, Inc.
 
    We have audited the accompanying  statement of revenue and certain  expenses
of  16000  Ventura  for the  period  January 1,  1995  to March  15,  1995. This
statement  of  revenue  and  certain  expenses  is  the  responsibility  of  the
management  of 16000 Ventura. Our responsibility is to express an opinion on the
statement of revenue and certain expenses 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 statement of revenue and certain expenses
is free of material misstatement. An audit includes examining, on a test  basis,
evidence  supporting the amounts and disclosures  in the financial statement. 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 audit  provides a reasonable  basis
for our opinion.
 
    The  accompanying statement of revenue and certain expenses was prepared for
the purpose of complying  with the rules and  regulations of the Securities  and
Exchange  Commission for inclusion in the registration statement on Form S-11 of
Arden Realty, Inc.  Certain expenses  (described in Note  1) that  would not  be
comparable  to  those  resulting  from the  proposed  future  operations  of the
property are  excluded  and the  statement  is not  intended  to be  a  complete
presentation of the revenue and expenses of the property.
 
    In  our  opinion, the  statement of  revenue  and certain  expenses presents
fairly, in all material respects, the  revenue and certain expenses, as  defined
above, of 16000 Ventura for the period January 1, 1995 to March 15, 1995.
 
                                          Ernst & Young LLP
 
Los Angeles, California
April 10, 1996
 
                                      F-31
<PAGE>
                                 16000 VENTURA
                   STATEMENT OF REVENUE AND CERTAIN EXPENSES
                                 (IN THOUSANDS)
                FOR THE PERIOD JANUARY 1, 1995 TO MARCH 15, 1995
 
<TABLE>
<S>                                                                                    <C>
REVENUE:
  Rental.............................................................................  $     674
  Tenant reimbursements..............................................................         24
  Parking............................................................................         36
  Other..............................................................................          7
                                                                                       ---------
    Total revenue....................................................................        741
                                                                                       ---------
CERTAIN EXPENSES:
  Property operating and maintenance.................................................        192
  Real estate taxes..................................................................         77
                                                                                       ---------
    Total certain expenses...........................................................        269
                                                                                       ---------
      Excess of revenue over certain expenses........................................  $     472
                                                                                       ---------
                                                                                       ---------
</TABLE>
 
      See accompanying notes to statement of revenue and certain expenses.
 
                                      F-32
<PAGE>
                                 16000 VENTURA
 
               NOTES TO STATEMENT OF REVENUE AND CERTAIN EXPENSES
 
                FOR THE PERIOD JANUARY 1, 1995 TO MARCH 15, 1995
 
1.  ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
ORGANIZATION
 
    The  accompanying  statement of  revenue and  certain expenses  includes the
operations of 16000 Ventura,  a 174,841 square  foot commercial office  property
located  in Encino,  California. 16000  Ventura was  acquired by  Bristol Encino
Associates, LLC  on  March  15,  1995  for  $18,889,000.  Substantial  ownership
interests in the entity that owns the property are held by Richard Ziman, Victor
Coleman,  Arthur  Gilbert, and  related individuals  and entities  controlled by
them, (the  "Arden  Predecessors"). The  Arden  Predecessors, along  with  other
unrelated   parties  which  collectively   represent  the  "Participants"  will,
concurrently  with  a  proposed  public   offering,  enter  into  a  series   of
transactions  with Arden  Realty, Inc., a  Maryland corporation, to  form a real
estate investment trust (the "REIT") to continue and expand the business of  the
Arden  Predecessors. 16000 Ventura has been managed by Arden Realty Group, Inc.,
a California corporation, since its acquisition by the Arden Predecessors. 16000
Ventura was purchased from a nonaffiliated third party.
 
BASIS OF PRESENTATION
 
    The accompanying  statement  was  prepared  to comply  with  the  rules  and
regulations  of  the Securities  and Exchange  Commission  for inclusion  in the
registration  statement  on  Form  S-11  of  Arden  Realty,  Inc.,  a   Maryland
corporation (the "Company").
 
    The  accompanying statement is  not representative of  the actual operations
for the period presented as certain expenses  that may not be comparable to  the
expenses  expected to  be incurred  by the Company  in the  future operations of
16000 Ventura  have  been  excluded.  Excluded  expenses  consist  of  interest,
depreciation  and amortization and property general and administrative costs not
directly comparable to the future operations of the 16000 Ventura.
 
REVENUE RECOGNITION
 
    Rental revenue is recognized on a straight-line basis over the terms of  the
related leases.
 
RISKS AND UNCERTAINTIES
 
    The  preparation  of  financial  statements  in  conformity  with  generally
accepted accounting  principles,  requires  management  to  make  estimates  and
assumptions  that affect the reported amount  of revenue and expenses during the
reporting period. Actual results could differ from those estimates.
 
2.  COMMERCIAL OFFICE PROPERTIES
    The future minimum lease  payments to be  received under existing  operating
leases as of March 15, 1995 are as follows:
 
<TABLE>
<S>                                                               <C>
1996............................................................  $2,790,000
1997............................................................  2,132,000
1998............................................................  1,275,000
1999............................................................    602,000
2000............................................................    282,000
Thereafter......................................................     --
</TABLE>
 
    The  above future minimum  lease payments do  not include specified payments
for tenant reimbursements of operating expenses.
 
    Office space in  16000 Ventura is  generally leased to  tenants under  lease
terms  which provide for the tenants to  pay for increases in operating expenses
in excess of specified amounts.
 
                                      F-33
<PAGE>
                         REPORT OF INDEPENDENT AUDITORS
 
To the Board of Directors
Arden Realty, Inc.
 
    We  have audited the accompanying statement  of revenue and certain expenses
of 1950 Sawtelle for the period January 1, 1995 to June 14, 1995. This statement
of revenue and certain expenses is the responsibility of the management of  1950
Sawtelle.  Our  responsibility is  to  express an  opinion  on the  statement of
revenue and certain expenses 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 statement of revenue and certain expenses
is free of material misstatement. An audit includes examining, on a test  basis,
evidence  supporting the amounts and disclosures  in the financial statement. 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 audit  provides a reasonable  basis
for our opinion.
 
    The  accompanying statement of revenue and certain expenses was prepared for
the purpose of complying  with the rules and  regulations of the Securities  and
Exchange  Commission for inclusion in the registration statement on Form S-11 of
Arden Realty, Inc.  Certain expenses  (described in Note  1) that  would not  be
comparable  to  those  resulting  from the  proposed  future  operations  of the
property are  excluded  and the  statement  is not  intended  to be  a  complete
presentation of the revenue and expenses of the property.
 
    In  our  opinion, the  statement of  revenue  and certain  expenses presents
fairly, in all material respects, the  revenue and certain expenses, as  defined
above, of 1950 Sawtelle for the period January 1, 1995 to June 14, 1995.
 
                                          Ernst & Young LLP
 
Los Angeles, California
April 10, 1996
 
                                      F-34
<PAGE>
                                 1950 SAWTELLE
                   STATEMENT OF REVENUE AND CERTAIN EXPENSES
                                 (IN THOUSANDS)
                FOR THE PERIOD JANUARY 1, 1995 TO JUNE 14, 1995
 
<TABLE>
<S>                                                                                    <C>
REVENUE:
  Rental.............................................................................  $     847
  Tenant reimbursements..............................................................         33
  Parking............................................................................         68
                                                                                       ---------
    Total revenue....................................................................        948
                                                                                       ---------
CERTAIN EXPENSES:
  Property operating and maintenance.................................................        204
  Real estate taxes..................................................................         83
                                                                                       ---------
    Total certain expenses...........................................................        287
                                                                                       ---------
      Excess of revenue over certain expenses........................................  $     661
                                                                                       ---------
                                                                                       ---------
</TABLE>
 
      See accompanying notes to statement of revenue and certain expenses.
 
                                      F-35
<PAGE>
                                 1950 SAWTELLE
 
               NOTES TO STATEMENT OF REVENUE AND CERTAIN EXPENSES
 
                FOR THE PERIOD JANUARY 1, 1995 TO JUNE 14, 1995
 
1.  ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
ORGANIZATION
 
    The  accompanying  statement of  revenue and  certain expenses  includes the
operations of 1950 Sawtelle,  a 103,772 square  foot commercial office  property
located  in Los Angeles, California. 1950 Sawtelle was acquired by 1950 Sawtelle
Associates,  L.P.  on  June  14,  1995  for  $9,251,000.  Substantial  ownership
interests in the entity that owns the property are held by Richard Ziman, Victor
Coleman, and related individuals and entities controlled by them (the "Owners").
The  Owners of this property and other affiliates (the "Arden Predecessors") and
other unrelated parties, which collectively represent the "Participants,"  will,
concurrently   with  a  proposed  public  offering,   enter  into  a  series  of
transactions with Arden  Realty, Inc., a  Maryland corporation, to  form a  real
estate  investment trust (the "REIT") to continue and expand the business of the
Arden Predecessors. 1950 Sawtelle has been managed by Arden Realty Group,  Inc.,
a  California corporation, since its acquisition by the Arden Predecessors. 1950
Sawtelle was purchased from a nonaffiliated third party.
 
BASIS OF PRESENTATION
 
    The accompanying  statement  was  prepared  to comply  with  the  rules  and
regulations  of  the Securities  and Exchange  Commission  for inclusion  in the
registration  statement  on  Form  S-11  of  Arden  Realty,  Inc.,  a   Maryland
corporation (the "Company").
 
    The  accompanying statement is  not representative of  the actual operations
for the period presented as certain expenses  that may not be comparable to  the
expenses expected to be incurred by the Company in the future operations of 1950
Sawtelle have been excluded. Excluded expenses consist of interest, depreciation
and  amortization  and property  general and  administrative costs  not directly
comparable to the future operations of the 1950 Sawtelle.
 
REVENUE RECOGNITION
 
    Rental revenue is recognized on a straight-line basis over the terms of  the
related leases.
 
RISKS AND UNCERTAINTIES
 
    The  preparation  of  financial  statements  in  conformity  with  generally
accepted accounting  principles,  requires  management  to  make  estimates  and
assumptions  that affect the reported amount  of revenue and expenses during the
reporting period. Actual results could differ from those estimates.
 
2.  COMMERCIAL OFFICE PROPERTIES
    The future minimum lease  payments to be  received under existing  operating
leases as of June 14, 1995 are as follows:
 
<TABLE>
<S>                                                               <C>
1996............................................................  $1,568,000
1997............................................................  1,338,000
1998............................................................    610,000
1999............................................................    173,000
2000............................................................    110,000
Thereafter......................................................    136,000
</TABLE>
 
    The  above future minimum  lease payments do  not include specified payments
for tenant reimbursements of operating expenses.
 
    Office space in  1950 Sawtelle is  generally leased to  tenants under  lease
terms  which provide for the tenants to  pay for increases in operating expenses
in excess of specified amounts.
 
                                      F-36
<PAGE>
                         REPORT OF INDEPENDENT AUDITORS
 
To the Board of Directors
Arden Realty, Inc.
 
    We have audited the accompanying  combined statement of revenue and  certain
expenses  of Westwood  Terrace, Skyview Center,  4811 and  4900/10 Airport Plaza
Drive and New Wilshire  for the period  December 1, 1994  to November 22,  1995.
This combined statement of revenue and certain expenses is the responsibility of
the  management of  Westwood Terrace, Skyview  Center, 4811  and 4900/10 Airport
Plaza Drive and New Wilshire. Our responsibility is to express an opinion on the
combined statement of revenue and certain expenses 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 combined statement of revenue and certain
expenses is free  of material misstatement.  An audit includes  examining, on  a
test  basis, evidence  supporting the amounts  and disclosures  in the financial
statement. 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  audit  provides   a
reasonable basis for our opinion.
 
    The  accompanying  combined statement  of revenue  and certain  expenses was
prepared for  the purpose  of complying  with the  rulesand regulations  of  the
Securities  and Exchange Commission for  inclusion in the registration statement
on Form S-11 of Arden Realty, Inc.  Certain expenses (described in Note 1)  that
would  not be comparable to those  resulting from the proposed future operations
of the  properties are  excluded  and the  statement is  not  intended to  be  a
complete presentation of the revenue and expenses of the properties.
 
    In  our  opinion, the  combined statement  of  revenue and  certain expenses
presents fairly,  in all  material respects,  the combined  revenue and  certain
expenses,  as  defined  above, of  Westwood  Terrace, Skyview  Center,  4811 and
4900/10 Airport Plaza Drive and New Wilshire for the period December 1, 1994  to
November 22, 1995.
 
                                          Ernst & Young LLP
 
Los Angeles, California
September 10, 1996
 
                                      F-37
<PAGE>
                       WESTWOOD TERRACE, SKYVIEW CENTER,
                      4811 AND 4900/10 AIRPORT PLAZA DRIVE
                                AND NEW WILSHIRE
 
               COMBINED STATEMENT OF REVENUE AND CERTAIN EXPENSES
                                 (IN THOUSANDS)
 
              FOR THE PERIOD DECEMBER 1, 1994 TO NOVEMBER 22, 1995
 
<TABLE>
<S>                                                                                  <C>
REVENUE:
  Rental...........................................................................  $  12,675
  Tenant reimbursements............................................................        693
  Parking..........................................................................      2,162
  Other............................................................................        805
                                                                                     ---------
  Total revenue....................................................................     16,335
                                                                                     ---------
 
CERTAIN EXPENSES:
  Property operating and maintenance...............................................      4,208
  Real estate taxes................................................................      1,505
  Insurance........................................................................        416
  Ground rent......................................................................        169
  Bad debts........................................................................         66
  Other............................................................................        107
                                                                                     ---------
  Total certain expenses...........................................................      6,471
                                                                                     ---------
    Excess of revenue over certain expenses........................................  $   9,864
                                                                                     ---------
                                                                                     ---------
</TABLE>
 
 See accompanying notes to combined statement of revenue and certain expenses.
 
                                      F-38
<PAGE>
                       WESTWOOD TERRACE, SKYVIEW CENTER,
                      4811 AND 4900/10 AIRPORT PLAZA DRIVE
                                AND NEW WILSHIRE
 
          NOTES TO COMBINED STATEMENT OF REVENUE AND CERTAIN EXPENSES
 
              FOR THE PERIOD DECEMBER 1, 1994 TO NOVEMBER 22, 1995
 
1.  ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
ORGANIZATION
 
    The accompanying combined statement of revenue and certain expenses includes
the  operations  of  five  commercial  office  properties  located  in  Southern
California which were acquired by Arden LAOP  IV, LLC on November 22, 1995  from
nonaffiliated third parties. The ownership interests in the entity that owns the
properties are held by Richard Ziman, Victor Coleman, Arthur Gilbert and related
individuals  and  entities controlled  by them  (the "Arden  Predecessors"). The
Arden Predecessors,  along  with  other unrelated  parties,  which  collectively
represent   the  "Participants,"  will,  concurrently  with  a  proposed  public
offering, enter  into  a series  of  transactions  with Arden  Realty,  Inc.,  a
Maryland  corporation, to  form a real  estate investment trust  (the "REIT") to
continue and  expand  the  business  of  the  Arden  Predecessors.  All  of  the
properties  have  been  managed  by  Arden  Realty  Group,  Inc.,  a  California
corporation, since acquisition by the Arden Predecessors.
 
    The properties are as follows:
 
<TABLE>
<CAPTION>
                           SOUTHERN        APPROXIMATE
                          CALIFORNIA         RENTABLE                           ACQUISITION
   PROPERTY NAME           LOCATION       SQUARE FOOTAGE   ACQUISITION DATE        PRICE
- --------------------  ------------------  --------------  ------------------  ----------------
<S>                   <C>                 <C>             <C>                 <C>
Westwood Terrace      Los Angeles               135,943        November 1995   $   18,953,000
Skyview Center        Los Angeles               391,675        November 1995       40,215,000
4811 and 4900/10
Airport Plaza Dr.     Long Beach                272,013        November 1995       14,452,000
New Wilshire          Los Angeles               202,704        November 1995       21,102,000
                                          --------------                      ----------------
                                              1,002,335                        $   94,722,000
                                          --------------                      ----------------
                                          --------------                      ----------------
</TABLE>
 
BASIS OF PRESENTATION
 
    The accompanying  statement  was  prepared  to comply  with  the  rules  and
regulations  of  the Securities  and Exchange  Commission  for inclusion  in the
registration  statement  on  Form  S-11  of  Arden  Realty,  Inc.,  a   Maryland
corporation  (the  "Company").  The  accompanying statement  was  prepared  on a
combined basis because the properties are all currently owned and managed by the
Arden Predecessors. There are no interproperty accounts to be eliminated.
 
    The accompanying statement  is not representative  of the actual  operations
for  the periods presented as certain expenses that may not be comparable to the
expenses expected to  be incurred  by the Company  in the  future operations  of
Westwood  Terrace, Skyview Center, 4811 and  4900/10 Airport Plaza Drive and New
Wilshire have been excluded. Excluded expenses consist of interest, depreciation
and amortization  and property  general and  administrative costs  not  directly
comparable  to the future  operations of Westwood  Terrace, Skyview Center, 4811
and 4900/10 Airport Plaza Drive and New Wilshire.
 
REVENUE RECOGNITION
 
    Rental revenue is recognized on a straight-line basis over the terms of  the
related leases.
 
RISKS AND UNCERTAINTIES
 
    The  preparation  of  financial  statements  in  conformity  with  generally
accepted accounting  principles,  requires  management  to  make  estimates  and
assumptions  that affect the reported amount  of revenue and expenses during the
reporting period. Actual results could differ from those estimates.
 
                                      F-39
<PAGE>
                       WESTWOOD TERRACE, SKYVIEW CENTER,
                      4811 AND 4900/10 AIRPORT PLAZA DRIVE
                                AND NEW WILSHIRE
 
   NOTES TO COMBINED STATEMENT OF REVENUE AND CERTAIN EXPENSES -- (CONTINUED)
 
              FOR THE PERIOD DECEMBER 1, 1994 TO NOVEMBER 22, 1995
 
2.  COMMERCIAL OFFICE PROPERTIES
    The future  minimum  lease  payments  to  be  received  under  the  existing
operating leases as of November 22, 1995 are as follows:
 
<TABLE>
<S>                                                              <C>
1996...........................................................  $15,290,000
1997...........................................................  13,880,000
1998...........................................................  11,456,000
1999...........................................................   9,396,000
2000...........................................................   8,271,000
Thereafter.....................................................  24,817,000
</TABLE>
 
    The  above future minimum  lease payments do  not include specified payments
for tenant reimbursements of operating expenses.
 
    Office space in Westwood Terrace,  Skyview Center, 4811 and 4900/10  Airport
Plaza  Drive and New Wilshire  is generally leased to  tenants under lease terms
which provide for  the tenants  to pay for  increases in  operating expenses  in
excess of specified amounts.
 
                                      F-40
<PAGE>
                         REPORT OF INDEPENDENT AUDITORS
 
To the Board of Directors
Arden Realty, Inc.
 
    We  have audited the accompanying combined  statement of revenue and certain
expenses of 70 South Lake and  Calabasas Commerce Center for the period  January
1,  1995 to November  22, 1995. This  combined statement of  revenue and certain
expenses is the responsibility of the management of 70 South Lake and  Calabasas
Commerce  Center. Our  responsibility is to  express an opinion  on the combined
statement of revenue and certain expenses 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 combined statement of revenue and certain
expenses is free  of material misstatement.  An audit includes  examining, on  a
test  basis, evidence  supporting the amounts  and disclosures  in the financial
statement. 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  audit  provides   a
reasonable basis for our opinion.
 
    The  accompanying  combined statement  of revenue  and certain  expenses was
prepared for the  purpose of  complying with the  rules and  regulations of  the
Securities  and Exchange Commission for  inclusion in the registration statement
on Form S-11 of Arden Realty, Inc.  Certain expenses (described in Note 1)  that
would  not be comparable to those  resulting from the proposed future operations
of the  properties are  excluded  and the  statement is  not  intended to  be  a
complete presentation of the revenue and expenses of the properties.
 
    In  our  opinion, the  combined statement  of  revenue and  certain expenses
presents fairly,  in all  material respects,  the combined  revenue and  certain
expenses,  as defined above, of 70 South  Lake and Calabasas Commerce Center for
the period January 1, 1995 to November 22, 1995.
 
                                          Ernst & Young LLP
 
Los Angeles, California
April 10, 1996
 
                                      F-41
<PAGE>
                  70 SOUTH LAKE AND CALABASAS COMMERCE CENTER
               COMBINED STATEMENT OF REVENUE AND CERTAIN EXPENSES
                                 (IN THOUSANDS)
              FOR THE PERIOD JANUARY 1, 1995 TO NOVEMBER 22, 1995
 
<TABLE>
<CAPTION>
REVENUE:
<S>                                                                                   <C>
  Rental............................................................................  $   3,411
  Tenant reimbursements.............................................................        401
  Parking...........................................................................        150
  Other.............................................................................         77
                                                                                      ---------
  Total revenue.....................................................................      4,039
                                                                                      ---------
CERTAIN EXPENSES:
  Property operating and maintenance................................................        968
  Real estate taxes.................................................................        232
  Insurance.........................................................................         43
  Other.............................................................................         10
                                                                                      ---------
  Total certain expenses............................................................      1,253
                                                                                      ---------
    Excess of revenue over certain expenses.........................................  $   2,786
                                                                                      ---------
                                                                                      ---------
</TABLE>
 
 See accompanying notes to combined statement of revenue and certain expenses.
 
                                      F-42
<PAGE>
                  70 SOUTH LAKE AND CALABASAS COMMERCE CENTER
          NOTES TO COMBINED STATEMENT OF REVENUE AND CERTAIN EXPENSES
 
1.  ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
ORGANIZATION
 
    The accompanying combined statement of revenue and certain expenses includes
the  operations  of  two  commercial  office  properties  located  in   Southern
California  which were acquired by Arden LAOP  IV, LLC on November 22, 1995. The
ownership interests in the entity that  owns the properties are held by  Richard
Ziman,  Victor  Coleman, Arthur  Gilbert  and related  individuals  and entities
controlled by them  (the "Arden  Predecessors"). The  Arden Predecessors,  along
with  other unrelated parties, which  collectively represent the "Participants,"
will, concurrently  with a  proposed public  offering, enter  into a  series  of
transactions  with Arden  Realty, Inc.  a Maryland  corporation, to  form a real
estate investment trust (the "REIT") to continue and expand the business of  the
Arden  Predecessors. All  of the  properties have  been managed  by Arden Realty
Group,  Inc.,  a  California  corporation,   since  acquisition  by  the   Arden
Predecessors. The properties were purchased from nonaffiliated third parties.
 
    The properties are as follows:
 
<TABLE>
<CAPTION>
                                                    APPROXIMATE
                                        SOUTHERN      RENTABLE
                                       CALIFORNIA      SQUARE                              ACQUISITION
            PROPERTY NAME               LOCATION      FOOTAGE        ACQUISITION DATE         PRICE
- -------------------------------------  -----------  ------------  ----------------------  -------------
<S>                                    <C>          <C>           <C>                     <C>
70 South Lake........................  Pasadena         100,133        November 22, 1995  $  10,457,000
Calabasas Commerce Center............  Calabasas        123,121        November 22, 1995     10,987,000
                                                    ------------                          -------------
                                                        223,254                           $  21,444,000
                                                    ------------                          -------------
                                                    ------------                          -------------
</TABLE>
 
BASIS OF PRESENTATION
 
    The  accompanying  statement  was  prepared to  comply  with  the  rules and
regulations of  the Securities  and  Exchange Commission  for inclusion  in  the
registration   statement  on  Form  S-11  of  Arden  Realty,  Inc.,  a  Maryland
corporation (the  "Company").  The  accompanying statement  was  prepared  on  a
combined basis because the properties are all currently owned and managed by the
Arden Predecessors. There are no interproperty accounts to be eliminated.
 
    The  accompanying statement is  not representative of  the actual operations
for the period presented as certain expenses  that may not be comparable to  the
expenses  expected to be incurred by the  Company in the future operations of 70
South Lake and Calabasas Commerce  Center have been excluded. Excluded  expenses
consist  of  interest, depreciation  and amortization  and property  general and
administrative costs  not directly  comparable to  the future  operations of  70
South Lake and Calabasas Commerce Center.
 
REVENUE RECOGNITION
 
    Rental  revenue is recognized on a straight-line basis over the terms of the
related leases.
 
RISKS AND UNCERTAINTIES
 
    The  preparation  of  financial  statements  in  conformity  with  generally
accepted  accounting  principles,  requires  management  to  make  estimates and
assumptions that affect the reported amount  of revenue and expenses during  the
reporting period. Actual results could differ from those estimates.
 
                                      F-43
<PAGE>
                  70 SOUTH LAKE AND CALABASAS COMMERCE CENTER
   NOTES TO COMBINED STATEMENT OF REVENUE AND CERTAIN EXPENSES -- (CONTINUED)
 
2.  COMMERCIAL OFFICE PROPERTIES
    The  future minimum lease  payments to be  received under existing operating
leases as of November 22, 1995 are as follows:
 
<TABLE>
<CAPTION>
1996.............................................................  3,150,000
<S>                                                                <C>
1997.............................................................  2,749,000
1998.............................................................  2,133,000
1999.............................................................  1,870,000
2000.............................................................    731,000
Thereafter.......................................................  1,968,000
</TABLE>
 
    The above future minimum  lease payments do  not include specified  payments
for tenant reimbursements of operating expenses.
 
    Office  space in  70 South Lake  and Calabasas Commerce  Center is generally
leased to tenants under  lease terms which  provide for the  tenants to pay  for
increases in operating expenses in excess of specified amounts.
 
                                      F-44
<PAGE>
                         REPORT OF INDEPENDENT AUDITORS
 
To the Board of Directors
Arden Realty, Inc.
 
    We  have audited the accompanying combined  statement of revenue and certain
expenses of the 1996 Acquired Properties  for the year ended December 31,  1995.
This combined statement of revenue and certain expenses is the responsibility of
the management of the 1996 Acquired Properties. Our responsibility is to express
an  opinion on the combined  statement of revenue and  certain expenses 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 combined statement of revenue and certain
expenses is free  of material misstatement.  An audit includes  examining, on  a
test  basis, evidence  supporting the amounts  and disclosures  in the financial
statement. 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  audit  provides   a
reasonable basis for our opinion.
 
    The  accompanying  combined statement  of revenue  and certain  expenses was
prepared for the  purpose of  complying with the  rules and  regulations of  the
Securities  and Exchange Commission for  inclusion in the registration statement
on Form S-11 of Arden Realty, Inc.  Certain expenses (described in Note 1)  that
would  not be comparable to those  resulting from the proposed future operations
of the  properties are  excluded  and the  statement is  not  intended to  be  a
complete presentation of the revenue and expenses of the properties.
 
    In  our  opinion, the  combined statement  of  revenue and  certain expenses
presents fairly,  in all  material respects,  the combined  revenue and  certain
expenses,  as defined above, of the 1996  Acquired Properties for the year ended
December 31, 1995, in conformity with generally accepted accounting principles.
 
                                          Ernst & Young LLP
 
Los Angeles, California
April 10, 1996
 
                                      F-45
<PAGE>
                            1996 ACQUIRED PROPERTIES
 
              COMBINED STATEMENTS OF REVENUE AND CERTAIN EXPENSES
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                                                       FOR THE YEAR
                                                                                                          ENDED
                                                                                                       DECEMBER 31,
                                                                                                           1995
                                                                                       FOR THE 1996    ------------
                                                                                      INTERIM PERIOD
                                                                                         PRIOR TO
                                                                                        ACQUISITION
                                                                                      ---------------
                                                                                        (UNAUDITED)
<S>                                                                                   <C>              <C>
REVENUE
  Rental............................................................................     $   3,923      $   19,391
  Tenant reimbursements.............................................................           258             961
  Parking...........................................................................           308           1,859
  Other.............................................................................           144             350
                                                                                            ------     ------------
    Total revenue...................................................................         4,633          22,561
                                                                                            ------     ------------
 
CERTAIN EXPENSES
  Property operating and maintenance................................................         1,065           5,401
  Real estate taxes.................................................................           151           1,753
  Insurance.........................................................................           135             521
  Ground rent.......................................................................           138           1,067
  Bad debts.........................................................................        --                 106
                                                                                            ------     ------------
    Total certain expenses..........................................................         1,489           8,848
                                                                                            ------     ------------
      Excess of revenue over certain expenses.......................................     $   3,144      $   13,713
                                                                                            ------     ------------
                                                                                            ------     ------------
</TABLE>
 
 See accompanying notes to combined statements of revenue and certain expenses.
 
                                      F-46
<PAGE>
                            1996 ACQUIRED PROPERTIES
 
          NOTES TO COMBINED STATEMENTS OF REVENUE AND CERTAIN EXPENSES
 
                      FOR THE YEAR ENDED DECEMBER 31, 1995
 
1.  ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
ORGANIZATION
 
    The accompanying combined statements of revenue and certain expenses include
the combined operations of five commercial office properties located in Southern
California which were  acquired in  1996 (the "1996  Acquired Properties")  from
nonaffiliated third parties by entities in which substantial interests are owned
by  Richard Ziman,  Victor Coleman, Arthur  Gilbert and  related individuals and
controlled by them (the "Arden Predecessors"). The properties were purchased for
cash utilizing  funds  from new  debt  financing.  Two of  the  properties  (400
Corporate  Pointe and 5832 Bolsa) were acquired  from a single seller. The Arden
Predecessors, along with other  unrelated parties, which collectively  represent
the  "Participants," will, concurrently  with a proposed  public offering, enter
into a series of transactions with  Arden Realty, Inc., a Maryland  corporation,
to  form a real estate investment trust  (the "REIT") to continue and expand the
business of the Arden Predecessors. All  of the properties have been managed  by
Arden  Realty Group, Inc., a California  corporation, since their acquisition by
the Arden Predecessors.
 
    The 1996 Acquired Properties are as follows:
 
<TABLE>
<CAPTION>
                                                APPROXIMATE
                                                  RENTABLE
                          SOUTHERN CALIFORNIA      SQUARE       ACQUISITION      ACQUISITION
     PROPERTY NAME              LOCATION          FOOTAGE           DATE            PRICE
- ------------------------  --------------------  ------------  ----------------  --------------
<S>                       <C>                   <C>           <C>               <C>
5832 Bolsa                Huntington Beach           49,355      February 1996  $    4,654,000
400 Corporate Pointe      Culver City               164,598      February 1996      21,206,000
9665 Wilshire             Beverly Hills             158,684      February 1996      29,331,000
Imperial Bank Tower       San Diego                 540,413      February 1996      39,474,000
100 Broadway              Long Beach                191,727       July 1, 1996      19,799,000
                                                ------------                    --------------
                                                  1,104,777                     $  114,464,000
                                                ------------                    --------------
                                                ------------                    --------------
</TABLE>
 
BASIS OF PRESENTATION
 
    The accompanying  statements were  prepared  to comply  with the  rules  and
regulations  of  the Securities  and Exchange  Commission  for inclusion  in the
registration  statement  on  Form  S-11  of  Arden  Realty,  Inc.,  a   Maryland
corporation  (the  "Company"). The  accompanying statements  were prepared  on a
combined basis because the properties are controlled by the Arden  Predecessors.
There are no interproperty accounts to be eliminated.
 
    The  accompanying statements are not representative of the actual operations
for the periods presented as certain expenses that may not be comparable to  the
expenses  expected to be incurred by the Company in the future operations of the
1996 Acquired  Properties  have  been excluded.  Excluded  expenses  consist  of
interest,  depreciation and amortization and property general and administrative
costs not directly  comparable to  the future  operations of  the 1996  Acquired
Properties.
 
REVENUE RECOGNITION
 
    Rental  revenue is recognized on a straight-line basis over the terms of the
related leases.
 
RISKS AND UNCERTAINTIES
 
    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 revenue and expenses during  the
reporting period. Actual results could differ from those estimates.
 
                                      F-47
<PAGE>
                            1996 ACQUIRED PROPERTIES
 
  NOTES TO COMBINED STATEMENTS OF REVENUE AND CERTAIN EXPENSES -- (CONTINUED)
 
                      FOR THE YEAR ENDED DECEMBER 31, 1995
 
1.  ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
UNAUDITED INTERIM STATEMENT
 
    The  combined  interim  financial  statements for  the  1996  interim period
includes the revenue and certain expenses for the period prior to acquisition by
the Arden Predecessors. In the opinion of management, such financial  statements
reflect  all adjustments necessary for a fair presentation of the results of the
respective interim  periods. All  such adjustments  are of  a normal,  recurring
nature.
 
2.  COMMERCIAL OFFICE PROPERTIES
    The  future minimum lease  payments to be  received under existing operating
leases as of December 31, 1995 are as follows:
 
<TABLE>
<S>                                              <C>
1996...........................................  $19,849,000
1997...........................................  18,159,000
1998...........................................  16,405,000
1999...........................................  15,866,000
2000...........................................  14,204,000
Thereafter.....................................  34,774,000
</TABLE>
 
    The above future minimum  lease payments do  not include specified  payments
for tenant reimbursements of operating expenses.
 
    Office  space in the 1996 Acquired Properties is generally leased to tenants
under lease  terms  which  provide for  the  tenants  to pay  for  increases  in
operating expenses in excess of specified amounts.
 
                                      F-48
<PAGE>
                         REPORT OF INDEPENDENT AUDITORS
 
To the Board of Directors
Arden Realty, Inc.
 
    We  have audited the accompanying combined  statement of revenue and certain
expenses of the  Acquisition Properties for  the year ended  December 31,  1995.
This combined statement of revenue and certain expenses is the responsibility of
the  management of the Acquisition Properties.  Our responsibility is to express
an opinion on the  combined statement of revenue  and certain expenses 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 combined statement of revenue and certain
expenses  is free  of material misstatement.  An audit includes  examining, on a
test basis, evidence  supporting the  amounts and disclosures  in the  financial
statement.  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  audit  provides  a
reasonable basis for our opinion.
 
    The accompanying  combined statement  of revenue  and certain  expenses  was
prepared  for the  purpose of  complying with the  rules and  regulations of the
Securities and Exchange Commission for  inclusion in the registration  statement
on  Form S-11 of Arden Realty, Inc.  Certain expenses (described in Note 1) that
would not be comparable to those  resulting from the proposed future  operations
of  the  properties are  excluded  and the  statement is  not  intended to  be a
complete presentation of the revenue and expenses of the properties.
 
    In our  opinion, the  combined  statement of  revenue and  certain  expenses
presents  fairly, in  all material  respects, the  combined revenue  and certain
expenses, as defined  above, of the  Acquisition Properties for  the year  ended
December 31, 1995, in conformity with generally accepted accounting principles.
 
                                          Ernst & Young LLP
 
Los Angeles, California
April 19, 1996
 
                                      F-49
<PAGE>
                             ACQUISITION PROPERTIES
 
              COMBINED STATEMENTS OF REVENUE AND CERTAIN EXPENSES
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                                    SIX MONTHS ENDED    FOR THE YEAR
                                                                                        JUNE 30,            ENDED
                                                                                  --------------------  DECEMBER 31,
                                                                                    1996       1995         1995
                                                                                  ---------  ---------  -------------
                                                                                      (UNAUDITED)
<S>                                                                               <C>        <C>        <C>
REVENUE
  Rental........................................................................  $   2,101  $   2,240    $   4,280
  Tenant reimbursements.........................................................         58         26           54
  Parking.......................................................................         87         55          133
  Other.........................................................................        174         31           85
                                                                                  ---------  ---------       ------
    Total revenue...............................................................      2,420      2,352        4,552
                                                                                  ---------  ---------       ------
 
CERTAIN EXPENSES
  Property operating and maintenance............................................        717        844        1,606
  Real estate taxes.............................................................        190        205          412
  Insurance.....................................................................        114         78          151
  Bad debts.....................................................................     --              2           18
  Other.........................................................................     --             20           41
                                                                                  ---------  ---------       ------
    Total certain expenses......................................................      1,021      1,149        2,228
                                                                                  ---------  ---------       ------
      Excess of revenue over certain expenses...................................  $   1,399  $   1,203    $   2,324
                                                                                  ---------  ---------       ------
                                                                                  ---------  ---------       ------
</TABLE>
 
 See accompanying notes to combined statements of revenue and certain expenses.
 
                                      F-50
<PAGE>
                             ACQUISITION PROPERTIES
 
          NOTES TO COMBINED STATEMENTS OF REVENUE AND CERTAIN EXPENSES
 
                      FOR THE YEAR ENDED DECEMBER 31, 1995
 
1.  ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
ORGANIZATION
 
    The accompanying combined statements of revenue and certain expenses include
the  combined operations of two commercial office properties located in Southern
California (the  "Acquisition Properties")  which are  to be  acquired by  Arden
Realty, Inc., a Maryland corporation (the "Company") from the same nonaffiliated
third  party, concurrently  with the consummation  of a  proposed initial public
offering of the Common Stock of the Company.
 
    The Acquisition Properties are as follows:
 
<TABLE>
<CAPTION>
                             SOUTHERN        APPROXIMATE
                            CALIFORNIA         RENTABLE      ACQUISITION
    PROPERTY NAME            LOCATION       SQUARE FOOTAGE      PRICE
- ----------------------  ------------------  --------------  -------------
<S>                     <C>                 <C>             <C>
303 Glenoaks Blvd.      Burbank                  175,449    $  24,854,000
12501 East Imperial     Norwalk                  122,175        9,978,000
                                                 -------    -------------
                                                 297,624    $  34,832,000
                                                 -------    -------------
                                                 -------    -------------
</TABLE>
 
BASIS OF PRESENTATION
 
    The accompanying statements have been prepared to comply with the rules  and
regulations  of  the Securities  and Exchange  Commission  for inclusion  in the
registration statement on Form S-11 of the Company.
 
    The accounts of the Acquisition Properties are combined in the statements of
revenue and  certain expenses  and there  are no  interproperty accounts  to  be
eliminated.  The accompanying  statements are  not representative  of the actual
operations for  the  periods presented  as  certain  expenses that  may  not  be
comparable  to the expenses expected to be incurred by the Company in the future
operations of the Acquisition Properties  have been excluded. Excluded  expenses
consist  of  interest, depreciation  and amortization  and property  general and
administrative costs not  directly comparable  to the future  operations of  the
Acquisition Properties.
 
REVENUE RECOGNITION
 
    Rental  revenue is recognized on a straight-line basis over the terms of the
related leases.
 
RISKS AND UNCERTAINTIES
 
    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.
 
UNAUDITED INTERIM STATEMENT
 
    The  combined statements of revenue and  certain expenses for the six months
ended June 30, 1996 and 1995 are  unaudited. In the opinion of management,  such
financial  statements reflect all adjustments  necessary for a fair presentation
of the results of the respective interim periods. All such adjustments are of  a
normal, recurring nature.
 
                                      F-51
<PAGE>
                             ACQUISITION PROPERTIES
 
  NOTES TO COMBINED STATEMENTS OF REVENUE AND CERTAIN EXPENSES -- (CONTINUED)
 
                      FOR THE YEAR ENDED DECEMBER 31, 1995
 
2.  COMMERCIAL OFFICE PROPERTY
    The  future minimum lease  payments to be  received under existing operating
leases as of December 31, 1995 are as follows:
 
<TABLE>
<S>                                               <C>
1996............................................  $5,310,000
1997............................................  5,185,000
1998............................................  4,175,000
1999............................................  2,789,000
2000............................................  1,770,000
Thereafter......................................  1,739,000
</TABLE>
 
    The above future minimum  lease payments do  not include specified  payments
for tenant reimbursements of operating expenses.
 
    Office  space in the  Acquisition Properties is  generally leased to tenants
under lease  terms  which  provide for  the  tenants  to pay  for  increases  in
operating expenses in excess of specified amounts.
 
                                      F-52
<PAGE>
      Map of California showing the locations of Arden Realty Group, Inc.
 properties in Los Angeles County (including a blow up of Los Angeles County),
                      Orange County and San Diego County.
<PAGE>
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
    No  dealer, salesman  or any  other person has  been authorized  to give any
information or to  make any  representations not contained  in 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 of any securities  other than those to
which it relates or an offer to sell,  or a solicitation of an offer to buy,  to
any  person in  any jurisdiction  where such an  offer or  solicitation would be
unlawful. Neither the delivery  of this Prospectus nor  any sale made  hereunder
shall,  under  any circumstances,  create any  implication that  the information
contained herein is correct as of any time subsequent to the date hereof.
 
                             ---------------------
 
                           SUMMARY TABLE OF CONTENTS
 
   
<TABLE>
<CAPTION>
                                                       Page
                                                        ---
<S>                                                  <C>
Prospectus Summary.................................          1
Risk Factors.......................................         17
The Company........................................         29
Business and Growth Strategies.....................         31
Use of Proceeds....................................         35
Distributions......................................         36
Capitalization.....................................         42
Dilution...........................................         43
Selected Combined Financial Information............         44
Management's Discussion and Analysis of Financial
  Condition and Results of Operations..............         47
Southern California Economy and Office Markets.....         56
Business and Properties............................         61
Office Submarkets and Property Information.........         72
Management.........................................         94
Structure and Formation of the Company.............        100
Policies With Respect to Certain Transactions......        104
Certain Transactions...............................        107
Partnership Agreement..............................        108
Principal Stockholders.............................        111
Capital Stock......................................        112
Certain Provisions of Maryland law and the
  Company's Charter and Bylaws.....................        115
Shares Available for Future Sale...................        118
Federal Income Tax Consequences....................        119
ERISA Considerations...............................        130
Underwriting.......................................        133
Experts............................................        134
Legal Matters......................................        135
Additional Information.............................        135
Glossary...........................................        136
Index to Financial Statements......................        F-1
</TABLE>
    
 
                             ---------------------
 
    Until              , 1996 (25 days after  the date of this Prospectus),  all
dealers  effecting transactions in the securities offered hereby, whether or not
participating 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.
 
                               18,847,500 SHARES
 
                               ARDEN REALTY, INC.
 
                                  COMMON STOCK
 
                              -------------------
 
                                   PROSPECTUS
                                          , 1996
 
                             ---------------------
 
                                LEHMAN BROTHERS
 
                               ALEX. BROWN & SONS
                                  INCORPORATED
 
                           DEAN WITTER REYNOLDS INC.
 
                           A.G. EDWARDS & SONS, INC.
 
                               SMITH BARNEY INC.
 
                            EVEREN SECURITIES, INC.
 
                             LEGG MASON WOOD WALKER
                                  INCORPORATED
 
                                RAYMOND JAMES &
                                ASSOCIATES, INC.
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
                PART II. INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 30.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.
 
<TABLE>
<S>                                                             <C>
Registration Fee - Securities and Exchange Commission.........  $ 150,344.00
NASD Fee......................................................  $  30,500.00
New York Stock Exchange Listing Fee...........................  $  84,600.00
Transfer Agent and Registrar's Fees...........................  $  20,000.00
Printing and Engraving Expenses...............................  $ 300,000.00
Legal Fees and Expenses (other than Blue Sky).................  $1,500,000.00
Accounting Fees and Expenses..................................  $1,800,000.00
Blue Sky Fees and Expenses....................................  $  50,000.00
Miscellaneous Expenses........................................  $ 404,556.00
                                                                ------------
    Total.....................................................  $4,340,000.00
                                                                ------------
                                                                ------------
</TABLE>
 
   
ITEM 31.  SALES TO SPECIAL PARTIES.
    
 
    See Item 32.
 
ITEM 32.  RECENT SALES OF UNREGISTERED SECURITIES.
 
    As  part of  the Formation Transactions  an aggregate of  2,889,071 OP Units
will be issued to the following Participants in return for (i) the  contribution
of  certain interests in the Arden Predecessors and in certain of the Properties
to the Operating Partnership  and (ii) the contribution  by Arden of certain  of
its assets, including management contracts relating to certain of the Properties
and the contract rights to purchase the Acquisition Properties: Richard S. Ziman
(556,991  OP Units), Victor J. Coleman  (325,992 OP Units), Michele Byer (51,032
OP Units), Jonathan Glaser (4,876 OP Units), Anaheim Properties Company  (34,138
OP  Units),  Arden Century  Associates (41,992  OP Units),  Arden LAOP  Two, LLC
(43,200 OP  Units), Arden  Sawtelle  Associates (38,374  OP Units),  Broad  Base
Investments  Two, LLC  (37,518 OP Units),  Coleman Enterprises,  Inc. (84,108 OP
Units), Gilbert Trust (436,601 OP Units), Intercity Building Associates  (39,801
OP  Units),  Metropolitan  Falls  Partners  (68,918  OP  Units),  Montour Realty
Associates (213,710 OP Units), NAMIZ, Inc. (formerly Arden Realty Group, Inc., a
California corporation) (775,196 OP Units) and Ziman Realty Partners (136,674 OP
Units).
 
    The issuance of the OP 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. The descriptions  of the  foregoing
transactions  in  the Prospectus  under  the headings  "Formation Transactions,"
"Management" and "Certain Transactions" are incorporated herein by reference.
 
ITEM 33.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.
 
    The MGCL  permits  a  Maryland  corporation to  include  in  its  charter  a
provision   limiting  the  liability  of  its  directors  and  officers  to  the
corporation  and  its  stockholders  for  money  damages  except  for  liability
resulting  from (a) actual  receipt of an  improper benefit or  profit in money,
property or services or  (b) active and deliberate  dishonesty established by  a
final  judgment as  being material to  the cause  of action. The  Charter of the
Company contains such a provision which eliminates such liability to the maximum
extent permitted by Maryland law.
 
    The Charter of the Company authorizes it, to the maximum extent permitted by
Maryland law, to obligate itself to indemnify and to pay or reimburse reasonable
expenses in advance of final disposition of  a proceeding to (a) any present  or
former  director or officer or  (b) any individual who,  while a director of the
Company and  at  the  request of  the  Company,  serves or  has  served  another
corporation,  partnership, joint venture, trust,  employee benefit plan or other
enterprise from and  against any  claim or liability  to which  such person  may
incur  by reason of his  status as a present  or former stockholder, director or
officer of the Company. The  Bylaws of the Company  obligate it, to the  maximum
extent  permitted  by  Maryland  law,  to  indemnify  and  to  pay  or reimburse
reasonable expenses in advance of final  disposition of a proceeding to (a)  any
present  or former director of officer who is  made a party to the proceeding by
reason of  his service  in that  capacity or  (b) any  individual who,  while  a
director  of the Company and at the request of the Company, serves or has served
another corporation, partnership, joint venture, trust, employee benefit plan or
any
 
                                      II-1
<PAGE>
other enterprise as a director, officer, partner or trustee of such corporation,
partnership, joint venture, trust, employee benefit plan or other enterprise and
who is made a party to the proceeding by reason of his service in that  capacity
against  any claim or liability to which he may become subject by reason of such
service. The Charter and Bylaws also permit the Company to indemnify and advance
expenses to any person  who served a  predecessor of the Company  in any of  the
capacities  described above  and to any  employee or  agent of the  Company or a
predecessor of the Company.
 
    The MGCL  requires a  corporation (unless  its charter  provides  otherwise,
which the Company's Charter does not) to indemnify a director or officer who has
been successful, on the merits or otherwise, in the defense of any proceeding to
which  he is made a party  by reason of his services  in that capacity. The MGCL
permits a  corporation  to  indemnify  its  present  and  former  directors  and
officers,  among others,  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 (a) the act or omission of the director
or officer was material to the matter giving rise to the proceeding and (i)  was
committed  in  bad  faith  or  (ii) was  the  result  of  active  and deliberate
dishonesty, (b) the director or  officer actually received an improper  personal
benefit  in  money, property  or services  or (c)  in the  case of  any criminal
proceeding, the director or officer had reasonable cause to believe that the act
or omission was unlawful. However, a Maryland corporation may not indemnify  for
an  adverse  judgment in  a  suit by  or  in the  right  of the  corporation. In
addition, the MGCL requires the Company,  as a condition to advancing  expenses,
to obtain (a) a written affirmation by the director or officer of his good faith
belief  that he has met the standard of conduct necessary for indemnification by
the Company as authorized by the Bylaws and (b) a written statement by or on his
behalf to  repay the  amount  paid or  reimbursed by  the  Company if  it  shall
ultimately be determined that the standard of conduct was not met.
 
ITEM 34.  TREATMENT OF PROCEEDS FROM STOCK BEING REGISTERED.
 
    Not applicable.
 
ITEM 35.  FINANCIAL STATEMENTS AND EXHIBITS.
 
    (a) Financial Statements.
 
    ARDEN REALTY, INC.
 
    Pro Forma Condensed Combined Financial Statements (Unaudited)
 
       Pro  Forma Condensed  Combined Balance Sheet  as of  June 30, 1996
       (Unaudited)
 
       Pro Forma Condensed Combined Statement  of Operations for the  Six
       Months Ended June 30, 1996 (Unaudited)
 
       Pro  Forma Condensed Combined Statement of Operations for the Year
       Ended December 31, 1995 (Unaudited)
 
       Notes  to  Pro  Forma  Condensed  Combined  Financial   Statements
       (Unaudited)
 
    Historical:
 
       Report of Independent Auditors
 
       Balance Sheet as of May 1, 1996 and June 30, 1996 (Unaudited)
 
       Notes to Balance Sheet
 
    ARDEN PREDECESSORS
 
    Combined Financial Statements:
 
       Report of Independent Auditors
 
       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 Years  Ended December 31,
       1995, 1994 and 1993
 
                                      II-2
<PAGE>
       Combined Statements of  Owners' Equity  for the  Six Months  ended
       June  30, 1996 (Unaudited) and the  Years Ended December 31, 1995,
       1994 and 1993
 
       Combined Statements of Cash  Flows for the  Six Months ended  June
       30,  1996 and  1995 (Unaudited) and  the Years  Ended December 31,
       1995, 1994 and 1993
 
       Notes to Combined Financial Statements
 
       Schedule III  --  Commercial  Office  Properties  and  Accumulated
       Depreciation
 
    16000 VENTURA
 
    Statement of Revenue and Certain Expenses:
 
       Report of Independent Auditors
 
       Statement  of Revenue and Certain  Expenses for the Period January
       1, 1995 to March 15, 1995
 
       Notes to Statement of Revenue and Certain Expenses
 
    1950 SAWTELLE
 
    Statement of Revenue and Certain Expenses:
 
       Report of Independent Auditors
 
       Statement of Revenue and Certain  Expenses for the Period  January
       1, 1995 to June 14, 1995
 
       Notes to Statement of Revenue and Certain Expenses
 
    WESTWOOD  TERRACE, SKYVIEW CENTER, 4811  AND 4900/10 AIRPORT PLAZA DRIVE
    AND NEW WILSHIRE
 
    Combined Statement of Revenue and Certain Expenses:
 
       Report of Independent Auditors
 
       Combined Statement of Revenue and Certain Expenses for the  Period
       December 1, 1994 to November 22, 1995
 
       Notes to Combined Statement of Revenue and Certain Expenses
 
    70 SOUTH LAKE AND CALABASAS COMMERCE CENTER
 
    Combined Statement of Revenue and Certain Expenses:
 
       Report of Independent Auditors
 
       Combined  Statement of Revenue and Certain Expenses for the Period
       January 1, 1995 to
       November 22, 1995
 
       Notes to Combined Statement of Revenue and Certain Expenses
 
    1996 ACQUIRED PROPERTIES
 
    Combined Statements of Revenue and Certain Expenses:
 
       Report of Independent Auditors
 
       Combined Statements of Revenue and  Certain Expenses for the  1996
       Interim  Period Prior to Acquisition  (Unaudited) and the Year End
       December 31, 1995
 
       Notes to Combined Statements of Revenue and Certain Expenses
 
                                      II-3
<PAGE>
    ACQUISITION PROPERTIES
 
    Combined Statements of Revenue and Certain Expenses:
 
       Report of Independent Auditors
 
       Combined Statements of  Revenue and Certain  Expenses for the  Six
       Months Ended June 30, 1996 and 1995 (Unaudited) and the Year Ended
       December 31, 1995
 
       Notes to Combined Statements of Revenue and Certain Expenses
 
    (b)  Schedules Included in Part II: None.
 
    All other schedules have been omitted because they are either not applicable
or  the information required has been  disclosed in the financial statements and
related notes included in this Prospectus.
 
    (c) Exhibits.
 
   
<TABLE>
<C>        <S>
     1.1*  Form of Underwriting Agreement between the Company and the Representatives.
     3.1*  Form of Articles of Amendment and Restatement of the Company's Charter.
     3.2*  Bylaws of the Company.
     3.3*  Specimen of certificate representing shares of Common Stock.
     5.1*  Opinion of Ballard Spahr Andrews & Ingersoll regarding the validity of the
            securities being registered.
     8.1*  Opinion of Latham & Watkins regarding tax matters.
    10.1*  Form of Agreement of Limited Partnership of the Operating Partnership.
    10.2*  1996 Stock Option and Incentive Plan.
    10.3*  Form of Officers and Directors Indemnification Agreement.
    10.5*  Commitment Letter regarding Mortgage Financing.
    10.6*  Employment Agreement between the Company and Mr. Ziman.
    10.7*  Employment Agreement between the Company and Mr. Coleman.
    10.8*  Employment Agreement between the Company and Ms. Laing.
    10.9*  Miscellaneous Rights Agreement among the Company, the Operating Partnership,
            NAMIZ, Inc. and Mr. Ziman.
   10.10*  Ground lease for Imperial Bank Tower.
   10.11*  Ground lease for parking structure at Imperial Bank Tower.
   10.12*  Master Ground Lease for Long Beach Airport Business Park.
   10.13*  Ground lease for parking structure at the Anaheim City Centre.
   10.14*  Option Agreement with Broad Base Investments Two, LLC.
   10.15*  Option Agreement with CIC Equities, Inc.
   10.16*  Option Agreement with TJB Investments, Inc.
   10.17*  Contribution Agreement with Richard S. Ziman.
   10.18*  Contribution Agreement with Victor J. Coleman.
   10.19*  Contribution Agreement with Michele Byer.
   10.20*  Contribution Agreement with Arden Century Associates.
   10.21*  Contribution Agreement with Arden LAOP Two, LLC.
   10.22*  Contribution Agreement with Arden Sawtelle Associates.
   10.23*  Contribution Agreement with Coleman Enterprises, Inc.
   10.24*  Partnership Interest Contribution Agreement with Arthur Gilbert and Rosalinde
            Gilbert 1982 Trust.
   10.25*  Contribution Agreement with Intercity Building Associates.
   10.26*  Contribution Agreement with Metropolitan Falls Partners.
   10.27*  Contribution Agreement with Montour Realty Associates.
   10.28*  Contribution Agreement with Ziman Realty Partners.
</TABLE>
    
 
                                      II-4
<PAGE>
   
<TABLE>
<C>        <S>
   10.29*  Contribution Agreement with Arthur Gilbert and Rosalinde Gilbert 1982 Trust.
   10.30*  Contribution Agreement with Arden Realty Group, Inc.
   10.31*  Office Market Study Prepared by Cushman & Wakefield of California, Inc.
   10.32*  Contribution Agreement with Broad Base Investments Two, LLC.
    21.1*  Subsidiary of the Registrant.
    23.1   Consent of Ernst & Young LLP.
    23.2*  Consent of Cushman & Wakefield of California, Inc.
    23.3*  Consent of Latham & Watkins (contained in Exhibit 8.1).
    23.4*  Consent of Carl D. Covitz.
    23.5*  Consent of Kenneth B. Roath.
    23.6*  Consent of Arthur Gilbert.
    23.7*  Consent of Steven C. Good.
    23.8*  Consent of Jerry Asher.
    23.9*  Consent of Ballard Spahr Andrews and Ingersoll (contained in Exhibit 5.1)
    24.*   Power of Attorney.
    27.    Financial Data Schedule.
</TABLE>
    
 
- ------------------------
*  Previously filed.
 
ITEM 36.  UNDERTAKINGS.
 
    The undersigned Company hereby undertakes to provide to the Underwriters  at
the  closing  specified  in  the Underwriting  Agreement,  certificates  in such
denominations and registered in  such names as required  by the Underwriters  to
permit prompt delivery to each purchaser.
 
    Insofar  as indemnification for liabilities arising under the Securities Act
may be permitted to directors, officers  and controlling persons of the  Company
pursuant  to the  provisions described  under Item  33 above,  or otherwise, the
Company  has  been  advised  that  in   the  opinion  of  the  Commission   such
indemnification  is against public policy as expressed in the Securities Act and
is, therefore,  unenforceable. In  the event  that a  claim for  indemnification
against  such liabilities  (other than  the payment  by the  Company of expenses
incurred or paid by a Director, officer or controlling person of the Company  in
the  successful defense of any  action, suit or proceeding)  is asserted by such
Director, Officer or controlling person in connection with the securities  being
registered,  the Company 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 Securities  Act and  will be governed  by the  final
adjudication of such issue.
 
    The undersigned Company hereby undertakes that:
 
    (1)  For the purposes of determining any liability under the Securities 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 Company  pursuant to Rule  424(b)(1) or  (4) or 497(h)
under the  Securities  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 Securities 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-5
<PAGE>
                                   SIGNATURES
 
   
    Pursuant to the requirements of the Securities Act, 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 Amendment No. 4 to Registration
Statement to  be  signed  on  its behalf  by  the  undersigned,  thereunto  duly
authorized,  in the City of  Los Angeles, State of California  on the 3rd day of
October, 1996.
    
 
                                          ARDEN REALTY, INC.
 
                                          By:        /s/ RICHARD S. ZIMAN
 
                                             -----------------------------------
                                                      Richard S. Ziman
                                             CHAIRMAN OF THE BOARD OF DIRECTORS
                                                 AND CHIEF EXECUTIVE OFFICER
 
   
    Pursuant to the requirements of the Securities Act, this Amendment No. 4  to
Registration  Statement has  been signed below  by the following  persons in the
capacities indicated on October 3, 1996.
    
 
                                               TITLE
                                     -------------------------
 
                                     Chairman of the Board of
       /s/ RICHARD S. ZIMAN           Directors and
- -----------------------------------   Chief Executive Officer
         Richard S. Ziman             (Principal Executive
                                      Officer)
 
      /s/ VICTOR J. COLEMAN*         President, Chief
- -----------------------------------   Operating Officer and
         Victor J. Coleman            Director
 
        /s/ DIANA M. LAING*          Chief Financial Officer
- -----------------------------------   (Principal Financial
          Diana M. Laing              Officer)
 
                                     Chief Accounting Officer
         /s/ MICHELE BYER*            and Secretary
- -----------------------------------   (Principal Accounting
           Michele Byer               Officer)
 
   *By:          /s/ RICHARD S.
               ZIMAN
- -----------------------------------
         Richard S. Ziman,
        as attorney-in-fact
 
                                      II-6
<PAGE>
                                 EXHIBIT INDEX
 
   
<TABLE>
<CAPTION>
 EXHIBIT                                                                                                 SEQUENTIALLY
   NO.                                             EXHIBIT                                               NUMBERED PAGE
- ---------  ----------------------------------------------------------------------------------------  ---------------------
<S>        <C>                                                                                       <C>
 1.1*      Form of Underwriting Agreement between the Company and the Representatives.
 3.1*      Form of Articles of Amendment and Restatement of the Company's Charter.
 3.2*      Bylaws of the Company.
 3.3*      Specimen of certificate representing shares of Common Stock.
 5.1*      Opinion of Ballard Spahr Andrews & Ingersoll regarding the validity of the securities
            being registered.
 8.1*      Opinion of Latham & Watkins regarding tax matters.
10.1*      Form of Agreement of Limited Partnership of the Operating Partnership.
10.2*      1996 Stock Option and Incentive Plan.
10.3*      Form of Officers and Directors Indemnification Agreement.
10.5*      Mortgage Financing Agreement.
10.6*      Employment Agreements between the Company and Mr. Ziman.
10.7*      Employment Agreement between the Company and Mr. Coleman.
10.8*      Employment Agreement between the Company and Ms. Laing.
10.9*      Miscellaneous Rights Agreement among the Company, the Operating Partnership, NAMIZ, Inc.
            and Mr. Ziman.
10.10*     Ground lease for Imperial Bank Tower.
10.11*     Ground lease for parking structure of Imperial Bank Tower.
10.12*     Master Ground Lease for Long Beach Airport Business Park.
10.13*     Ground lease for parking structure at the Anaheim City Centre.
10.14*     Option Agreement with Broad Base Investments Two, LLC.
10.15*     Option Agreement with CIC Equities, Inc.
10.16*     Option Agreement with TJB Investments, Inc.
10.17*     Contribution Agreement with Richard S. Ziman.
10.18*     Contribution Agreement with Victor J. Coleman.
10.19*     Contribution Agreement with Michele Byer.
10.20*     Contribution Agreement with Arden Century Associates.
10.21*     Contribution Agreement with Arden LAOP Two, LLC.
10.22*     Contribution Agreement with Arden Sawtelle Associates.
10.23*     Contribution Agreement with Coleman Enterprises, Inc.
10.24*     Partnership Interest Contribution Agreement with Arthur Gilbert and Rosalinde Gilbert
            1982 Trust.
</TABLE>
    
<PAGE>
   
<TABLE>
<CAPTION>
 EXHIBIT                                                                                                 SEQUENTIALLY
   NO.                                             EXHIBIT                                               NUMBERED PAGE
- ---------  ----------------------------------------------------------------------------------------  ---------------------
10.25*     Contribution Agreement with Intercity Building Associates.
<S>        <C>                                                                                       <C>
10.26*     Contribution Agreement with Metropolitan Falls Partners.
10.27*     Contribution Agreement with Montour Realty Associates.
10.28*     Contribution Agreement with Ziman Realty Partners.
10.29*     Contribution Agreement with Arthur Gilbert and Rosalinde Gilbert 1982 Trust.
10.30*     Contribution Agreement with Arden Realty Group, Inc.
10.31*     Office Market Study Prepared by Cushman & Wakefield of California, Inc.
10.32*     Contribution Agreement with Broad Base Investments Two, LLC.
21.1*      Subsidiary of the Registrant.
23.1       Consent of Ernst & Young LLP.
23.2*      Consent of Cushman & Wakefield of California, Inc.
23.3*      Consent of Latham & Watkins (contained in Exhibit 8.1).
23.4*      Consent of Carl D. Covitz.
23.5*      Consent of Kenneth B. Roath.
23.6*      Consent of Arthur Gilbert.
23.7*      Consent of Steven C. Good.
23.8*      Consent of Jerry Asher.
23.9*      Consent of Ballard Spahr Andrews and Ingersoll (contained in Exhibit 5.1).
24.*       Power of Attorney.
27.        Financial Data Schedule.
</TABLE>
    
 
- ------------------------
* Previously filed.

<PAGE>
                                                                    EXHIBIT 23.1
 
                        CONSENT OF INDEPENDENT AUDITORS
 
   
    We  consent to the reference of our  firm under the caption "Experts" and to
the use  of our  reports on  the Arden  Predecessors (as  defined in  the  Notes
thereto) dated April 10, 1996, 16000 Ventura dated April 10, 1996, 1950 Sawtelle
dated April 10, 1996, Westwood Terrace, Skyview Center, 4811 and 4900/10 Airport
Plaza  Drive  and New  Wilshire  dated September  10,  1996, 70  South  Lake and
Calabasas Commerce Center  dated April  10, 1996, the  1996 Acquired  Properties
dated April 10, 1996, the Acquisition Properties dated April 19, 1996, and Arden
Realty,  Inc., a Maryland corporation, dated May  1, 1996, in Amendment No. 4 to
the Registration  Statement filed  by  Arden Realty,  Inc.  on Form  S-11  dated
October 3, 1996 and the related Prospectus.
    
 
                                               /s/ ERNST & YOUNG LLP
  ------------------------------------------------------------------------------
 
   
Los Angeles, California
October 3, 1996
    

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE ARDEN
PREDECESSORS COMBINED BALANCE SHEETS AND THE COMBINED STATEMENTS OF OPERATIONS,
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   YEAR                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1995              DEC-31-1996
<PERIOD-END>                               DEC-31-1995              JUN-30-1996
<CASH>                                          13,039                  18,247
<SECURITIES>                                         0                       0
<RECEIVABLES>                                    2,873                   5,573
<ALLOWANCES>                                         0                       0
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                                15,912                  23,820
<PP&E>                                         164,170                 260,997
<DEPRECIATION>                                 (3,296)                 (6,248)
<TOTAL-ASSETS>                                 182,379                 286,165
<CURRENT-LIABILITIES>                            3,398                   4,726
<BONDS>                                              0                       0
                                0                       0
                                          0                       0
<COMMON>                                             0                       0
<OTHER-SE>                                           0                       0
<TOTAL-LIABILITY-AND-EQUITY>                   182,379                 286,165
<SALES>                                              0                       0
<TOTAL-REVENUES>                                11,692                  24,471
<CGS>                                                0                       0
<TOTAL-COSTS>                                    4,716                   9,082
<OTHER-EXPENSES>                                     0                       0
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                               5,537                  14,741
<INCOME-PRETAX>                                  (575)                 (2,482)
<INCOME-TAX>                                         0                       0
<INCOME-CONTINUING>                                  0                       0
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                     (576)                 (2,138)
<EPS-PRIMARY>                                        0                       0
<EPS-DILUTED>                                        0                       0
        

</TABLE>


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