BEACON PROPERTIES CORP
S-3/A, 1997-04-07
REAL ESTATE INVESTMENT TRUSTS
Previous: BEACON PROPERTIES CORP, 10-K/A, 1997-04-07
Next: SIMPSON MANUFACTURING CO INC /CA/, 4, 1997-04-07




   
      As filed with the Securities and Exchange Commission on April 7, 1997
    


                                          Registration Statement No. 333-21769 
===============================================================================

                      SECURITIES AND EXCHANGE COMMISSION 
                            WASHINGTON, D.C. 20549 

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

   
                       PRE-EFFECTIVE AMENDMENT NO. 3 to 
                                   FORM S-3 
                            REGISTRATION STATEMENT 
                                    Under 
                          THE SECURITIES ACT OF 1933 
    

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

                        BEACON PROPERTIES CORPORATION 
                         AND BEACON PROPERTIES, L.P. 

             (Exact name of registrant as specified in its charter)
<TABLE>
<CAPTION>
   <S>                                           <C>
   Beacon Properties Corporation--Maryland       Beacon Properties Corporation--04-3224258 
      Beacon Properties L.P.--Delaware              Beacon Properties, L.P.--04-3224259 
       (State or other jurisdiction of                       (I.R.S. Employer 
       incorporation or organization)                       Identification No.) 
</TABLE>

                                50 Rowes Wharf 
                         Boston, Massachusetts 02110 
                                (617) 330-1400 
        (Address and Telephone Number of Principal Executive Offices) 

                              Alan M. Leventhal 
                    President and Chief Executive Officer 
                                     and 
                            William A. Bonn, Esq. 
                               General Counsel 
                                50 Rowes Wharf 
                         Boston, Massachusetts 02110 
                                (617) 330-1400 
(Name, Address and Telephone Number, Including Area Code, of Agent for Service) 

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

                                  copies to: 
                            Gilbert G. Menna, P.C. 
                           Kathryn I. Murtagh, Esq. 
                         Goodwin, Procter & Hoar LLP 
                       Exchange Place, Boston, MA 02109 
                                (617) 570-1000 

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

   Approximate date of commencement of proposed sale to public: As soon as 
practicable after this registration statement becomes effective. 

   If the only securities being registered on this form are being offered 
pursuant to dividend or interest reinvestment plans, please check the 
following box. [ ] 

   If any of the securities being registered on this form are to be offered 
on a delayed or continuous basis pursuant to Rule 415 under the Securities 
Act of 1933, other than securities offered only in connection with dividend 
or interest reinvestment plans, check the following box. [X] 

   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. [ ] 

The Prospectus contained in this Registration Statement relates to and 
constitutes a Post-Effective Amendment to the Registration Statement on Form 
S-3 (No. 333-17237) of the Registrant, and it is intended to be the combined 
prospectus referred to in Rule 429 under the Securities Act of 1933, as 
amended. 

The registrants hereby amend this registration statement on such date or 
dates as may be necessary to delay its effective date until the registrants 
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 supplement shall not constitute an offer 
to sell nor the solicitation of an offer to buy nor shall there be any sale 
of these securities in any State in which such offer, solicitation or sale 
would be unlawful prior to registration or qualification under the securities 
laws of any such State. 

   
                            SUBJECT TO COMPLETION 
              PRELIMINARY PROSPECTUS SUPPLEMENT DATED APRIL 7, 1997

PROSPECTUS SUPPLEMENT 
(To Preliminary Prospectus dated April 7, 1997) 
    



                               7,000,000 Shares 

                        BEACON PROPERTIES CORPORATION 

                                 Common Stock 


   
     Beacon Properties Corporation (collectively with its subsidiaries, the
"Company") is a self-administered and self-managed real estate investment trust
(a "REIT") which owns a portfolio of Class A office properties and other
commercial properties located in major metropolitan areas, including Boston,
Atlanta, Chicago, Los Angeles, San Francisco and Washington, D.C., as well as
commercial real estate development, acquisition, leasing, design and management
businesses. The Company owns or has an interest in 104 income producing
commercial properties encompassing approximately 15.8 million rentable square
feet (each, a "Property" and collectively, the "Properties"), including the
recently acquired Shoreline Technology Park located in Mountain View,
California, Lake Marriott Business Park located in Santa Clara, California and
Presidents Plaza located in suburban Chicago, Illinois (collectively, the
"Recent Acquisitions"). As of December 31, 1996, the Properties were
approximately 96% leased with over 1,100 tenants. In addition, the Company has
entered into contracts to acquire eight additional office buildings encompassing
approximately 2 million additional rentable square feet consisting of Westbrook
Corporate Center located in suburban Chicago, Illinois; 10880 Wilshire Boulevard
located in suburban Los Angeles; and Centerpointe I and II located in Fairfax
County, Virginia for aggregate consideration of approximately $339.1 million
(collectively, the "Pending Acquisitions"). If all of the Pending Acquisitions
are consummated, the Company will own or have an interest in 112 income
producing commercial properties encompassing approximately 17.8 million rentable
square feet.
    

     All of the shares of common stock of the Company, par value $.01 per share
("Common Stock"), offered hereby are being sold by the Company (the "Offering").
Senior executive officers and Directors of the Company and members of their
families currently own approximately $131 million of equity of the Company.

     The Common Stock is listed on the New York Stock Exchange (the "NYSE")
under the symbol "BCN." On March 26, 1997, the last reported sale price of the
Common Stock on the NYSE was $35 per share. See "Price Range of Common Stock and
Distribution History."


     See "Risk Factors" beginning on page S-16 for certain factors relevant to
an investment in the Common Stock.

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 SUPPLEMENT OR THE PROSPECTUS. ANY REPRESENTATION 
                    TO THE CONTRARY IS A CRIMINAL OFFENSE. 

<TABLE>
<CAPTION>
                     Price to        Underwriting      Proceeds to 
                      Public         Discount(1)       Company(2) 
- --------------------------------------------------------------------------------
<S>                <C>               <C>              <C>
Per Share             $                 $                $ 
Total(3)           $                 $                $ 
- -------------------------------------------------------------------------------
</TABLE>

(1) The Company has agreed to indemnify the Underwriters against certain 
    liabilities, including liabilities under the Securities Act of 1933, as 
    amended (the "Securities Act"). See "Underwriting." 

(2) Before deducting estimated expenses of $       payable by the Company. 

(3) The Company has granted the Underwriters an option, exercisable for 30 
    days after the date of this Prospectus Supplement, to purchase up to an 
    additional 1,050,000 shares of Common Stock to cover over-allotments, if 
    any. If all such shares are purchased, the total Price to Public, 
    Underwriting Discount and Proceeds to Company will be $       , $ 
    and $       , respectively. See "Underwriting." 

   The shares of Common Stock are offered by the several Underwriters, 
subject to prior sale, when, as and if issued to and accepted by them, 
subject to approval of certain legal matters by counsel for the Underwriters. 
The Underwriters reserve the right to withdraw, cancel or modify such offer 
and to reject orders in whole or in part. It is expected that delivery of the 
Common Stock offered hereby will be made in New York, New York, on or about 
April   , 1997. 

Merrill Lynch & Co. 
   Dean Witter Reynolds Inc. 
      Donaldson, Lufkin & Jenrette 
         Securities Corporation 
            Lehman Brothers 
               Raymond James & Associates, Inc. 
                  Smith Barney Inc. 

          The date of this Prospectus Supplement is April   , 1997. 



<PAGE> 

Beacon 
- ------------
Properties
- ------------
Corporation
- ------------

[Graphic of U.S Map with the following areas highlighted:

San Fransisco, Los Angeles, Chicago, Atlanta, Boston, Philadelphia, Washington



Urban/Suburban
Distribution of
Properties

Urban       21%
Suburban    79%



Geographic Distribution of Properties

Boston            34%
Chicago           17%
Los Angeles        7%
Philadelphia       3%
Atlanta           20%
Washington        12%
San Francisco      7%



Recent and Pending Acquisitions

PHOTO: Presidents Plaza, Chicago, Illinois
PHOTO: Presidents Plaza, Chicago, Illinois
PHOTO: Lake Marriott Business Park, Santa Clara, California
PHOTO: Shoreline Technology Park, Mountain View, California
PHOTO: Crosby Corporate Center, Bedford, Massachusetts Additional Development
PHOTO: 10880 Wilshire Boulevard, Los Angeles, California
PHOTO: Westbrook Corporate Center, Westchester, Illinois
PHOTO: Centerpointe, Fairfax, Virginia
PHOTO: Westbrook Corporate Center, Westchester, Illinois





   CERTAIN PERSONS PARTICIPATING IN THIS OFFERING MAY ENGAGE IN TRANSACTIONS 
THAT STABILIZE, MAINTAIN OR OTHERWISE AFFECT THE PRICE OF THE SHARES OF 
COMMON STOCK. SUCH TRANSACTIONS MAY INCLUDE STABILIZING THE PURCHASE OF 
COMMON STOCK TO COVER SYNDICATE SHORT POSITIONS AND THE IMPOSITION OF PENALTY 
BIDS. FOR A DESCRIPTION OF THESE ACTIVITIES, SEE "UNDERWRITING." 

                                     S-2 

<PAGE> 

                        PROSPECTUS SUPPLEMENT SUMMARY 


   The following summary is qualified in its entirety by the more detailed 
information included elsewhere in this Prospectus Supplement and the 
accompanying Prospectus or incorporated herein and therein by reference. 
Unless otherwise indicated, the information contained in this Prospectus 
Supplement assumes (i) that all units of limited partnership interest in 
Beacon Properties, L.P. ("Units") redeemable for Common Stock or cash have 
been redeemed for Common Stock, (ii) that the Underwriters' over-allotment 
option is not exercised and (iii) that the market price per share of Common 
Stock is equal to $35 (the reported closing sale price of the Common Stock on 
the NYSE on March 26, 1997). Unless the context otherwise requires, all 
references in this Prospectus Supplement to the "Company" shall mean Beacon 
Properties Corporation, Beacon Properties, L.P. (the "Operating 
Partnership"), the entity through which the Company holds substantially all 
of its direct and indirect interests in the Properties, and their 
subsidiaries on an aggregated basis. This Prospectus Supplement contains 
forward-looking statements within the meaning of Section 27A of the 
Securities Act of 1933, as amended, and Section 21E of the Securities 
Exchange Act of 1934, as amended. The Company's actual results could differ 
materially from those set forth in the forward-looking statements. Certain 
factors that might cause such a difference are discussed in the section 
entitled "Risk Factors" starting on page S-16 of this Prospectus Supplement. 


                                 The Company 

   The Company is a self-managed and self-administered real estate investment 
trust (a "REIT") which owns a portfolio of Class A office properties and 
other commercial properties located in major metropolitan areas, including 
Boston, Atlanta, Chicago, Los Angeles, San Francisco and Washington, D.C., as 
well as commercial real estate development, acquisition, leasing and 
management businesses. Class A office properties generally are considered to 
be those that have excellent locations and access, attract high quality 
tenants, are well maintained and professionally managed, and achieve among 
the highest rent, occupancy and tenant retention rates within their markets. 
The Properties comprise approximately 15.8 million rentable square feet in 
the aggregate and, as of December 31, 1996, were approximately 96% leased 
with over 1,100 tenants. 


   The Company is currently experiencing a period of rapid growth. Upon 
completion of the Pending Acquisitions, the Company will have invested 
approximately $1.5 billion in office properties since January 1996, 
increasing its interests in real estate by over 290%. The Company has entered 
into contracts to acquire the Pending Acquisitions comprised of eight office 
buildings encompassing approximately 2.0 million additional rentable square 
feet located in suburban Chicago, Illinois; suburban Los Angeles, California; 
and Fairfax County, Virginia. The aggregate consideration for the Pending 
Acquisitions is approximately $339.1 million. If all of the Pending 
Acquisitions are consummated, the Company will own or have an interest in 112 
income producing commercial buildings encompassing approximately 17.8 million 
rentable square feet, approximately 79% of which will be located in suburban 
office markets and approximately 21% of which will be located in downtown 
office markets, primarily Boston. Assuming the consummation of all of the 
Pending Acquisitions, the Company will have a total market capitalization of 
approximately $2.9 billion. 

   The Company's business is conducted principally through the Operating 
Partnership, two subsidiary corporations and two subsidiary limited 
partnerships. The Company conducts third-party management operations through 
Beacon Property Management Corporation, a Delaware corporation (the 
"Management Company") and conducts third-party tenant space design services 
through Beacon Design Corporation, a Massachusetts corporation (the "Design 
Company"). Through the Management Company, the Company manages approximately 
2.9 million square feet of commercial and office space owned by third parties 
in various locations including Boston and Springfield, Massachusetts and 
Chicago, Illinois. The Company conducts management operations for wholly- 
owned properties through Beacon Property Management, L.P. a Delaware limited 
partnership (the "Management Partnership"), and conducts tenant space design 
services for wholly-owned properties through Beacon Design, L.P., a Delaware 
limited partnership (the "Design Partnership"). 


                                     S-3 

<PAGE> 

                                 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 any investment in the Company. Such risks include, among 
others: 


   
   [bullet] Risks associated with the Company's ability to manage effectively
            the addition of a substantial number of new properties to the 
            Company's portfolio, which could adversely affect the Company's 
            results of operations and ability to make expected distributions to
            stockholders;
    

   [bullet] Risks associated with borrowing, such as the possibility that (i) 
            the Company will not have sufficient funds available to make 
            principal payments on outstanding debt; (ii) outstanding 
            indebtedness will be refinanced at higher interest rates or 
            otherwise on terms less favorable to the Company; and (iii) 
            interest rates under the Company's $300 million revolving credit 
            facility (the "Credit Facility") will increase, all of which 
            could adversely affect the Company's ability to make expected 
            distributions to stockholders and its ability to qualify as a 
            REIT; 

   
   [bullet] Risks associated with a Debt to Market Capitalization Ratio 
            (calculated as the Company's proportionate share of total 
            consolidated and unconsolidated debt, excluding Rowes Wharf) upon 
            completion of the Offering and the Pending Acquisitions of 
            approximately 25.2%, which could adversely affect the Company's
            results of operations and ability to make expected distributions to
            stockholders;

   [bullet] Risks associated with the Company's joint ownership of properties
            which prevent the Company from exercising sole decision making 
            authority over the property;

   [bullet] Possible adverse consequences of limiting ownership of Common 
            Stock by a single person to 6.0%, or 9.9% for certain 
            stockholders, of the outstanding Common Stock, which may deter
            changes in management;

   [bullet] Risks associated with the acquisition and development of office 
            and other commercial properties such as the risk that the Company's
            results of operations and ability to make expected distributions to 
            stockholders could be adversely affected if the investments fail to
            perform as expected; 
    

   [bullet] Real estate investment considerations, such as the effect of 
            general economic and real estate market conditions in the market 
            area on property cash flows and values, the need to renew leases 
            or relet space upon the expiration of current leases, the ability 
            of a property to generate revenues sufficient to meet debt 
            service payments and other operating expenses, and the 
            illiquidity of real estate investments, all of which may affect 
            the Company's ability to make expected distributions; 

   [bullet] Risks associated with investments in mortgage indebtedness, 
            including the risk that a debtor may file for bankruptcy or 
            otherwise be unable or refuse to make payments under the mortgage 
            which may affect the Company's ability to realize its anticipated 
            investment return with respect to such investments; 

   [bullet] Potential liability of the Company for environmental liabilities 
            either as an owner or as an operator of properties which could 
            adversely affect the Company's results of operations, financial 
            condition and ability to make expected distributions; 

   
   [bullet] Risks associated with ownership of subsidiary corporations, 
            including potential tax liabilities to the Company from operating
            subsidiaries, the Company's lack of control over such subsidiaries
            due to tax requirements prohibiting the Company's ownership of 
            voting stock in such entities and possible adverse consequences of 
            the Company's status as a REIT on the business of subsidiaries; and
    

   [bullet] Possible increases in market interest rates, which lead 
            prospective purchasers of Common Stock to demand a higher 
            anticipated annual yield from future dividends, which in turn may 
            adversely affect the market price of the Common Stock. 

                                     S-4 

<PAGE> 

                             Recent Developments 

Recent Acquisitions 

   Silicon Valley Office/R&D Market 


   Shoreline Technology Park and Lake Marriott Business Park. In December 
1996, the Company acquired a 12-building complex located in Mountain View, 
California ("Shoreline Technology Park") and a 7-building complex located in 
Santa Clara, California ("Lake Marriott Business Park") for aggregate 
consideration of approximately $184 million (including approximately $1 
million of expected non-recurring capital expenditures). The Company 
purchased the Properties from Teachers Insurance and Annuity Association. 

   
     The Shoreline Technology Park is a 12-building complex developed between
1985 and 1991 which encompasses approximately 727,000 square feet. Shoreline
Technology Park is the headquarters of Silicon Graphics, Inc., which is the 
sole tenant of the Property. The Lake Marriott Business Park is a 7-building 
complex developed in 1981 which encompasses approximately 400,000 square feet.
Major tenants in the Lake Marriott Business Park include Silicon Valley 
Bank (approximately 101,000 square feet) and Hitachi Computer Products
(America), Inc. (approximately 97,000 square feet). The Shoreline Technology
Park and substantially all of the Lake Marriott Business Park are currently
leased on a "triple-net" basis. The aggregate occupancy rate of both Properties
as of December 31, 1996 was 100%.
    


   Shoreline Technology Park and Lake Marriott Business Park are located in 
the Silicon Valley Office/R&D Market. According to Cornish & Carey, the 
entire Silicon Valley Office/R&D Market, which consists of approximately 129 
million rentable square feet, had an overall vacancy rate of 5.3% as of 
December 31, 1996. Cornish & Carey also reports that the Silicon Valley 
Office/R&D Market experienced net increases in square feet of leased space 
("Net Absorption") of approximately 1.7 million square feet in 1996. 

   Shoreline Technology Park and Lake Marriott Business Park represent the 
Company's first acquisitions in the Silicon Valley Office/R&D Market. As part 
of its continuing analysis of major office markets and investment 
opportunities, the Company has determined that the San Francisco and San Jose 
metropolitan areas possess attractive market fundamentals, including growth 
in office-using employment. According to the U.S. Bureau of Labor Statistics, 
during the twelve months ended November 30, 1996, approximately 13,400 
office-using jobs were created in the combined San Francisco/San Jose 
metropolitan area, primarily in business services including multi- media, 
computer software and hardware, and consulting. The Company has further 
determined that the Silicon Valley Office/R&D Market is particularly 
attractive due to its high concentration of knowledge-based industries 
including biotechnology, communications, and computer hardware and software 
as well as its proximity to major universities. Additionally, the Company 
believes there is substantial constraint on new supply of office space in the 
Silicon Valley Office/R&D Market due to geographic barriers and the high cost 
of land. 


   Based upon its survey of brokers in the market and other internal 
research, the Company believes that the existing rental rates per square foot 
at Shoreline Technology Park and Lake Marriott Business Park are below 
current market rates by approximately $7 to $9 and $5 to $7, respectively. 
The Company expects that the net operating income generated by the Properties 
will increase as current leases are renewed, and new leases are made, at 
current market rates, although no assurances can be made in this regard. The 
Company expects to incur certain tenant improvement costs and leasing 
commissions in connection with the releasing of this space. 


   For a description of the Silicon Valley Office/R&D Market, see "Properties 
and Pending Acquisitions." 

   Suburban Chicago Office Market 

   Presidents Plaza. In December 1996, the Company acquired a four-tower 
office complex located near O'Hare International Airport in Chicago, Illinois 
("Presidents Plaza") from Metropolitan Life Insurance Company ("MetLife"). 
Aggregate consideration for Presidents Plaza consisted of 1,171,500 Units 
issued to MetLife (valued at approximately $39 million at the closing of the 
acquisition) and approximately $38 million in cash. In addition, the Company 
expects to incur approximately $1 million of non-recurring capital 
improvements at the Property. The Company estimates that the aggregate 
purchase price for Presidents Plaza is approximately 60% of replacement cost. 

                                     S-5 

<PAGE> 


   Presidents Plaza, located at 8600 and 8700 West Bryn Mawr Avenue, consists 
of two sets of 10- and 12-story towers encompassing an aggregate of 
approximately 791,000 square feet. The Property was developed between 1980 
and 1982. Major tenants at the Property include Cotter & Co. (approximately 
175,000 square feet), Wilson Sporting Goods Co. (approximately 109,000 square 
feet), and Gas Research Institute (approximately 97,000 square feet). As of 
December 31, 1996, the Property was approximately 90% leased. 

   Presidents Plaza is located in the O'Hare submarket of the Suburban 
Chicago Office Market. With the acquisition of Presidents Plaza, the Company 
increased its holdings of office properties in the Suburban Chicago Office 
Market to approximately 1.6 million square feet. According to Grubb & Ellis, 
the entire suburban Chicago Office Market had an overall vacancy rate of 
11.2% as of December 31, 1996, while the O'Hare submarket had a vacancy rate 
of 14.8% for the same period. Grubb & Ellis also reports that the O'Hare 
submarket experienced Net Absorption of approximately 242,000 square feet in 
1996. The Company believes that the Suburban Chicago Office Market possesses 
attractive market fundamentals, as evidenced by the creation of approximately 
34,000 office-using jobs in the Chicago metropolitan area during the twelve 
months ended November 30, 1996, according to the U.S. Bureau of Labor 
Statistics. For a description of the Suburban Chicago Office Market, see 
"Properties and Pending Acquisitions." 


   The Shoreline Technology Park, the Lake Marriott Business Park and 
Presidents Plaza are collectively referred to herein as the "Recent 
Acquisitions." 

Pending Acquisitions 


   The Company has entered into contracts to purchase the Pending 
Acquisitions for aggregate consideration of approximately $339.1 million 
(including approximately $2.2 million in non-recurring capital expenditures). 
The Company currently expects to complete the purchase of the Pending 
Acquisitions during the second quarter of 1997. However, the purchase of each 
of the Pending Acquisitions is subject to various closing conditions. 
Accordingly, no assurances can be made that the Company will acquire any or 
all of the Pending Acquisitions. 


   In addition to the Pending Acquisitions, as part of its ongoing business, 
the Company continually engages in discussions with public and private real 
estate entities regarding possible portfolio or single asset acquisitions in 
various major metropolitan areas. No assurances can be made that the Company 
will acquire any of the property opportunities currently under review. 

   The following describes each of the Pending Acquisitions. 

   Suburban Chicago Office Market 


   
     Westbrook Corporate Center. In March 1997, the Company entered into a
contract to acquire a five-building office complex located in Westchester
(suburban Chicago), Illinois (the "Westbrook Corporate Center"). The purchase
price of the property is approximately $182.1 million, consisting of the
expected assumption of approximately $106 million of mortgage debt, the issuance
of approximately $50 million of Units and approximately $26.1 million in cash.
The Company estimates that the aggregate purchase price for the Westbrook
Corporate Center is approximately 90% of replacement cost. In addition, the
Company has entered into a contract to purchase a 10-acre parcel of land 
suitable for development which is contiguous to the Westbrook Corporate Center,
for $3.5 million within twelve months of the acquisition.

    Westbrook Corporate Center consists of five 10-story office buildings
comprising an aggregate of approximately 1.1 million square feet. The buildings
each contain approximately 220,000 square feet and were developed between 1985
and 1996. Major tenants in the Westbrook Corporate Center include Navistar
International Corporation (approximately 100,000 square feet), Ameritech
(approximately 70,000 square feet), Peoplesoft (approximately 53,000 square
feet), Premier Health (approximately 45,000 square feet) and SAP America
(approximately 55,000 square feet). The aggregate occupancy rate for the
Westbrook Corporate Center as of December 31, 1996 was approximately 90%. Nearly
all of the vacancy at the property is attributable to the newest building in the
complex which opened in February 1996.
    


   Westbrook Corporate Center is located in the East-West Corridor of the 
Suburban Chicago Office Market. The Company currently owns approximately 1.6 
million square feet of office properties in the Suburban Chicago Office 
Market. According to Grubb & Ellis, the entire Suburban Chicago Office Market 
had an overall vacancy rate of 

                                     S-6 

<PAGE> 

11.2% as of December 31, 1996, while the East-West Corridor submarket had a 
vacancy rate of 9.8% for the same period. Grubb & Ellis also reports that the 
East-West Corridor submarket experienced Net Absorption of approximately 
524,000 square feet for 1996. As discussed above, the Company believes that 
the Suburban Chicago Office Market possesses attractive market fundamentals, 
as evidenced by the creation of approximately 34,000 office-using jobs in the 
Chicago metropolitan area during the twelve months ended November 30, 1996, 
according to the U.S. Bureau of Labor Statistics. For a description of the 
Suburban Chicago Office Market, see "Properties and Pending Acquisitions." 

   West Los Angeles Office Market 


   10880 Wilshire Boulevard. In March 1997, the Company entered into a 
contract to acquire the leasehold interest in 10880 Wilshire Boulevard 
located in Westwood, California. In connection with the acquisition, the 
Company will also acquire the right to purchase the fee interest in the land 
at fair market value in 2001. The Company will acquire the leasehold interest 
in 10880 Wilshire Boulevard for aggregate consideration of approximately $102 
million in cash (including approximately $2.2 million in expected 
non-recurring capital expenditures), approximately 75% of replacement cost, 
after giving effect to the leasehold. 

   
    The 10880 Wilshire Boulevard property was built in 1970 and has undergone
approximately $34 million of capital improvements since 1992. The property
consists of approximately 531,000 square feet in a 23-story office building.
This property is one of the largest buildings in the Westwood submarket of the
West Los Angeles Office Market and given the current constraints on development
described below, this property cannot be duplicated in its market. The property
is located near Interstates 405 and 10 with easy access to other West Los
Angeles markets, downtown, the San Fernando Valley and the Los Angeles airport.
In addition, the property, which meets current earthquake construction codes, is
located in a business district, adjacent to other Class A office buildings,
Westwood Village, a retail area, and the UCLA campus. Major tenants in 10880
Wilshire Boulevard include Showtime/Viacom International Inc. (approximately
68,000 square feet), Corporate Media Partners (approximately 64,000 square
feet), Oppenheimer & Co., Inc. (approximately 50,000 square feet) and Pardee
Construction Company (approximately 33,000 square feet). The Company currently
intends to retain the existing property manager of 10880 Wilshire Boulevard
following the consummation of the acquisition to facilitate the leasing and
management of the property. As of December 31, 1996, the occupancy rate for
10880 Wilshire Boulevard was approximately 85%.
    

   With the acquisition of 10880 Wilshire Boulevard, the Company will own 
approximately 1.1 million square feet of office space in the Westwood 
submarket of the West Los Angeles Office Market. According to CB Commercial, 
the entire West Los Angeles Office Market (consisting of approximately 34 
million square feet) had an overall vacancy rate of 11.4% as of December 31, 
1996, while the Westwood submarket (consisting of approximately 2.7 million 
square feet) experienced a vacancy rate of 9.1% for the same period. CB 
Commercial also reports that the West Los Angeles Office Market experienced 
Net Absorption of approximately 600,000 square feet in 1996. According to the 
U.S. Bureau of Labor Statistics, during the twelve months ended November 30, 
1996, approximately 51,000 office-using jobs were created in the Los Angeles 
metropolitan area, primarily in the entertainment, export/import, healthcare, 
telecommunications and aerospace industries. Additionally, limited sites are 
available for development in the Westwood submarket and this submarket has 
significant constraints on development including substantial development fees 
and/or the limitation of new development to 1.5 floor-area-ratio with 
five-story height limitations. For a description of the West Los Angeles 
Office Market, see "Properties and Pending Acquisitions." 

   The Company expects that the net operating income (excluding the effect of 
straight-line rents) generated by the property will increase $2.0 million and 
$600,000, respectively, during 1998 and 1999 as free rent provisions in 
current leases expire. Additionally, the Company expects that the net 
operating income generated by the property will further increase as new 
leases are made at market rates, although no assurances can be made in this 
regard. Approximately 78,000 square feet at the property is currently 
available for occupancy. The Company expects to incur certain tenant 
improvement costs and leasing commissions in connection with the leasing of 
this space. 


   The Fairfax County, Virginia Market 


   Centerpointe I and II. In March 1997, the Company entered into a contract 
to acquire two office properties located in Fairfax County, Virginia 
("Centerpointe I and II") for aggregate consideration of approximately $55 

                                     S-7 

<PAGE> 

million, consisting of approximately $25 million in cash and the assumption 
of approximately $30 million of mortgage debt. The Company estimates that the
aggregate purchase price for Centerpointe I and II is approximately 75% of 
replacement cost. 



   
    The Centerpointe property contains approximately 409,000 square feet and
consists of (i) Centerpointe I, an 11-story office building built in 1988 and
comprising approximately 204,500 square feet and (ii) Centerpointe II, an
11-story office building built in 1990 comprising approximately 204,500 square
feet. The sole tenant at Centerpointe I is American Management Systems, Inc.,
which also occupies approximately 100,000 square feet in Centerpointe II. Other
major tenants at Centerpointe II include Fujitsu Business Communications
Systems, Inc. (approximately 20,000 square feet) and Liberty Mutual Insurance
Company (approximately 15,000 square feet). As of December 31, 1996, the
aggregate occupancy rate for Centerpointe I and II was approximately 100%.
    


   In connection with the acquisition of Centerpointe I and II, the Company 
has also entered into an option/put arrangement with the sellers of 
Centerpointe I and II on an adjacent 7.8 acre parcel of land suitable for 
development. 

   Centerpointe I and II are located in the Fairfax County, Virginia market. 
The Company currently owns approximately 550,000 square feet of office 
properties in Fairfax County, Virginia. According to Grubb & Ellis, the 
Fairfax County, Virginia Market had an overall vacancy rate of 6.7% as of 
December 31, 1996 and experienced Net Absorption of approximately 3.3 million 
square feet for 1996. For a description of the Fairfax County, Virginia 
Market, see "Properties and Pending Acquisitions." 


Capitalization Rates 


   The following table sets forth the Capitalization Rates for the Recent 
Acquisitions and the Pending Acquisitions. The Capitalization Rates are 
calculated by dividing (a) the expected net operating income (including the 
effect of any straight-line rents) generated by the property based upon 
annualized revenues from signed leases in place at the property as of March 
1, 1997 by (b) the consideration paid for the property, including any 
expected capital improvements. 

<TABLE>

<CAPTION>
                                      Expected                         Expected 
                                    Net Operating   Consideration   Capitalization 
Property/Pending Acquisition (1)       Income            Paid            Rate 
 --------------------------------- --------------- ---------------  ---------------- 
                                     (millions)       (millions) 
<S>                                     <C>             <C>               <C>
Shoreline Technology Park/ 
 Lake Marriott Business Park (2)        $17.5           $184.0             9.5% 
Presidents Plaza (3)                      8.5             78.0            10.9% 
Westbrook Corporate Center (4)           18.3            182.1            10.1% 
10880 Wilshire Boulevard (5)              8.2            102.0             8.0% 
Centerpointe I and II (6)                 5.5             55.0            10.0% 
                                   --------------- ---------------  ---------------- 
  Total/Weighted Average                $58.0           $601.1             9.6% 
                                   =============== ===============  ================ 
</TABLE>


(1) Pending Acquisitions appear in italics. 


(2) Net operating income includes approximately $725,000 of straight-line 
    rents. Consideration Paid includes approximately $1 million of expected 
    non-recurring capital expenditures. The Company expects that net 
    operating income (excluding the effect of straight-line rents) will 
    increase by approximately $475,000 and $320,000, respectively, during 
    1998 and 1999 due to contractual rent increases scheduled to occur during 
    those periods. 

(3) Net operating income includes approximately $2.84 million of 
    straight-line rents. Consideration Paid includes approximately $1 million 
    of expected non-recurring capital expenditures. The Company expects that 
    net operating income (excluding the effect of straight-line rents) will 
    increase by approximately $640,000 and $670,000, respectively, during 
    1998 and 1999 due to contractual rent increases scheduled to occur during 
    those periods. 

(4) Net operating income includes approximately $1.2 million of straight-line 
    rents. The Company expects that net operating income (excluding the 
    effect of straight-line rents) will increase by approximately $1.2 
    million and $385,000, respectively, during 1998 and 1999 due to 
    contractual rent increases scheduled to occur during those periods. 
    Additionally, the Company expects that net operating income will increase 
    as vacant space in the newest building in the complex which opened in 
    February 1996 is leased, however, no assurances can 


                                     S-8 

<PAGE> 

    be made in this regard. The Return on Equity (as defined below) invested 
    by the Company in the Westbrook Corporate Center is expected to be 12.9%. 
    Return on Equity is calculated by dividing (a) the expected net operating 
    income (including the effect of straight line rents) generated by the 
    property based upon annualized revenues from signed leases in place at 
    the property as of March 1, 1997 less expected debt service on $106 
    million of mortgage debt at an interest rate of approximately 8% per annum 
    (the "Expected Westbrook Debt") by (b) the consideration paid for the 
     property less the principal amount of the Expected Westbrook Debt. 

(5) Net operating income includes approximately $2.7 million of straight-line 
    rents. Consideration Paid includes approximately $2.2 million of expected 
    non-recurring capital expenditures. As discussed above, the Company 
    expects that net operating income (excluding the effect of straight-line 
    rents) will increase by approximately $2.0 million and $600,000, 
    respectively, during 1998 and 1999 as free rent provisions in current 
    leases expire. The Company also expects that net operating income 
    (excluding the effect of straight-line rents) will increase by 
    approximately $195,000 and $210,000, respectively, during 1998 and 1999 
    due to contractual rent increases scheduled to occur during those 
    periods. Additionally, the Company expects that net operating income will 
    further increase as new leases are made at market rates, although no 
    assurance can be made in this regard. 

(6) Net operating income includes approximately $800,000 of straight-line 
    rents. The Company expects that net operating income (excluding the 
    effect of straight-line rents) will increase by approximately $270,000 
    and $420,000, respectively, during 1998 and 1999 due to contractual rent 
    increases scheduled to occur during those periods. The Return on Equity 
    invested by the Company in Centerpointe I and II is expected to be 13.3%. 
    Return on Equity is calculated by dividing (a) the expected net operating 
    income (including the effect of straight line rents) generated by the 
    property based upon annualized revenues from signed leases in place at 
    the property as of March 1, 1997, less expected debt service on $30 
    million of mortgage debt at an interest rate of 7.32% per annum (the 
    "Expected Centerpointe Debt") by (b) the consideration paid for the 
    property less the principal amount of the Expected Centerpointe Debt. 


Potential Acquisitions 


   As part of its ongoing business, the Company actively seeks opportunities 
to acquire additional properties on favorable terms. The purchase of any of 
these potential acquisitions is subject to satisfaction of numerous 
conditions, including, without limitation, the completion of due diligence 
and, with respect to the Rosemont, Illinois office complexes, the negotiation 
and execution of definitive purchase agreements. Additionally, the purchase 
of the Rosemont, Illinois office complexes are subject to rights of certain 
tenants to purchase portions of each of the two complexes. No assurances can 
be given that the Company will acquire any of the property opportunities 
currently under review. 

   Rosemont, Illinois Office Complexes. In March 1997, the Company entered 
into a letter of intent to acquire two office complexes located in Rosemont, 
Illinois (suburban Chicago) comprising an aggregate of approximately 1.3 
million square feet and which include approximately 2.9 acres of land 
suitable for the development of approximately 250,000 square feet of 
additional office space. This acquisition is subject, among other things, to 
the rights of certain tenants to purchase portions of each of the two 
complexes. See "Properties and Pending Acquisitions" for a description of the 
O'Hare submarket of the Suburban Chicago Office Market. 

   175 Wyman Street. In March 1997, the Company entered into a contract to 
acquire 26.7 acres of land suitable for development and a vacant 335,000 
square foot office/research and development complex located at 175 Wyman 
Street in Waltham (suburban Boston), Massachusetts for approximately $24.0 
million. The Company plans to redevelop the property into 400,000 square feet 
of Class A office space. The Company expects that such development could 
begin in late 1997 or early 1998. 175 Wyman Street is located in the Route 
128/Mass. Pike submarket. For a description of the Greater Boston Suburban 
Office Market, see "Properties and Pending Acquisitions." 

Other Developments 

   Credit Facility. The First National Bank of Boston ("Bank of Boston") has 
committed to convert the Company's $300 million secured Credit Facility to an 
unsecured facility. Additionally, Bank of Boston has committed to reduce the 
interest rate on the Credit Facility. 

   
   Sale of Westlakes Office Park. The Company is negotiating to sell the
Westlakes Office Park, its sole property located in the Suburban Philadelphia
Office Market. The consummation of this sale is subject to
    



                                     S-9 

<PAGE> 

customary closing conditions, including, but not limited to, purchaser's 
satisfactory completion of its due diligence. At the Company's option, the 
transaction may be structured as a like-kind exchange. 


   Crosby Corporate Center. In December 1996, the Company acquired a 
28.6-acre parcel of land adjacent to the Crosby Corporate Center. This parcel 
has approximately 250,000 square feet of building capacity, and the Company 
expects that development of a significant portion of the land could commence 
in the second quarter of 1997, although no assurances can be made in this 
regard. The Company believes that demand for office space in the Northwest 
submarket of the Greater Boston Suburban Office Market (the location of the 
Crosby Corporate Center) will continue as several major tenants at the 
Property experience substantial growth. No assurances can be made that such 
increased demand will occur. For a description of the Greater Boston Suburban 
Office Market, see "Properties and Pending Acquisitions." 

   Sale of Beacon Construction Company. In December 1996, Beacon Construction 
Company, Inc. (the "Construction Company") sold substantially all of its 
assets. The Construction Company's new business plan involves the completion 
of certain contracts not transferred to the purchaser and the liquidation of 
its remaining assets. The Company's decision to effect the sale of the 
Construction Company was based upon the determination that the third-party 
construction business was no longer an integral part of the Company's 
business. 



                                     S-10 

<PAGE> 

                   The Properties and Pending Acquisitions 
Set forth below are summary descriptions of the Properties and the 
Pending Acquisitions.

<TABLE>
<CAPTION>
                                                                                     Rentable     Percent Leased 
                                     Year Built/   Ownership        Property          Area in    At December 31, 
  Property/Pending Acquisition(1)     Renovated   Interest(2)       Location        Square Feet        1996 
 ---------------------------------- ------------- ------------ ------------------ --------------  --------------- 
<S>                                   <C>             <C>     <C>                   <C>                <C>
Downtown Boston Office Market: 
75-101 Federal Street                 1985-1998       51.6%   Boston, MA               812,000          92% 
One Post Office Square                     1981         50%   Boston, MA               764,129          99% 
Center Plaza                          1966-1969         (3)   Boston, MA               649,359          93% 
150 Federal Street                         1988        100%   Boston, MA               530,279          99% 
Rowes Wharf                                1987         45%   Boston, MA               344,326         100% 
Russia Wharf                          1978-1982        100%   Boston, MA               314,596          98% 
2 Oliver Street-147 Milk Street       1982-1988        100%   Boston, MA               271,000          97% 
175 Federal Street                         1977        100%   Boston, MA               203,349          94% 
South Station(4)                           1988        100%   Boston, MA               148,591         100% 
                                                                                  --------------  --------------- 
                                                                                     4,037,629          96% 
                                                                                  --------------  --------------- 
Greater Boston Suburban Office Market: 
Wellesley Office Park(5)              1963-1984        100%   Wellesley, MA            622,862         100% 
Crosby Corporate Center(6)                 1996        100%   Bedford, MA              336,000          88% 
Westwood Business Centre                   1985        100%   Westwood, MA             160,400         100% 
New England Executive Park 
  Portfolio(7)                        1970-1985        100%   Burlington, MA           817,013          98% 
                                                                                  --------------  --------------- 
                                                                                     1,936,275          97% 
                                                                                  --------------  --------------- 
Cambridge Office Market: 
One Canal Park                             1987        100%   Cambridge, MA            100,300         100% 
Ten Canal Park                             1987        100%   Cambridge, MA            110,000          92% 
245 First Street(8)                   1985-1986        100%   Cambridge, MA            263,227         100% 
                                                                                  --------------  --------------- 
                                                                                       473,527          98% 
                                                                                  --------------  --------------- 
Central Perimeter Atlanta Office Market: 
Perimeter Center Portfolio(9)         1970-1989        100%   Atlanta, GA            3,302,136          98% 
                                                                                  --------------  --------------- 
Arlington County, Virginia Office Market: 
The Polk and Taylor Buildings              1970         10%   Arlington, VA            890,000         100% 
1300 North Seventeenth Street              1980        100%   Rosslyn, VA              372,865          98% 
1616 North Fort Myer Drive                 1974        100%   Rosslyn, VA              292,826          99% 
                                                                                  --------------  --------------- 
                                                                                     1,555,691          99% 
                                                                                  --------------  --------------- 
Fairfax County, Virginia Office Market: 
John Marshall I                            1981        100%   McLean, VA               261,364         100% 
E.J. Randolph                              1983        100%   McLean, VA               164,677          97% 
Northridge I                               1988        100%   Reston/Herndon, VA       124,319         100% 
Centerpointe I                             1988        100%   Fairfax, VA              204,481         100% 
Centerpointe II                            1990        100%   Fairfax, VA              204,481         100% 
                                                                                  --------------  --------------- 
                                                                                       959,322          99% 
                                                                                  --------------  --------------- 
Washington, D.C. Office Market: 

1333 H Street                           1984(10)       100%   Washington, D.C.         238,694          90% 
Suburban Chicago Office Market: 
AT&T Plaza                                 1984        100%   Oak Brook, IL            225,318         100% 
Tri-State International(11)                1986        100%   Lincolnshire, IL         548,000          74% 
Presidents Plaza(12)                  1980-1982        100%   Chicago, IL              791,000          90% 
Westbrook Corporate Center(13)        1985-1996        100%   Westchester, IL        1,106,000          90% 
                                                                                  --------------  --------------- 
                                                                                     2,670,318          88% 
                                                                                  --------------  --------------- 
West Los Angeles Office Market: 
10960 Wilshire Boulevard              1971-1992        100%   Westwood, CA             543,804          89% 
10880 Wilshire Boulevard                   1970        100%   Westwood, CA             531,176          85% 
                                                                                  --------------  --------------- 
                                                                                     1,074,980          87% 
Suburban Philadelphia Office 
  Market: 
Westlakes Office Park(14)             1988-1990        100%   Berwyn, PA               443,592          98% 
                                                                                  --------------  --------------- 
Silicon Valley Office/R&D Market: 
Shoreline Technology Park(15)         1985-1991        100%   Mountain View, CA        726,500         100% 
Lake Marriott Business Park(16)            1981        100%   Santa Clara, CA          400,000         100% 
                                                                                  --------------  --------------- 
                                                                                     1,126,500         100% 
                                                                                  --------------  --------------- 
                                     S-11 

<PAGE> 

                                                                                     Rentable     Percent Leased 
                                     Year Built/   Ownership        Property          Area in    At December 31, 
  Property/Pending Acquisition(1)     Renovated   Interest(2)       Location        Square Feet        1996 
 ---------------------------------- ------------- ------------ ------------------ --------------  --------------- 
    Total Weighted Average 
      Properties                                                                    15,772,526          96% 
                                                                                  ==============  =============== 
    Total Weighted Average 
      Pending Acquisitions                                                           2,046,138          91% 
                                                                                  ==============  =============== 
    Total Weighted Average 
      Properties and Pending 
      Acquisitions                                                                  17,818,664          96% 
                                                                                  ==============  =============== 
</TABLE>

 (1) Pending Acquisitions appear in italics. 


 (2) The Company holds a general partner interest in One Post Office Square, 
     a general partner and limited partner interest in Center Plaza and the 
     Polk and Taylor Buildings and an indirect limited partner interest in 
     Rowes Wharf Associates. The Company holds approximately 51.6% of the 
     common stock of BeaMetFed, Inc. ("BeaMetFed"), the entity that holds the 
     fee title to the 75-101 Federal Street Property. The Company owns a 100% 
     fee interest in the remaining Properties, with the exception of South 
     Station, in which the Company holds a ground leasehold interest. Upon 
     the consummation of the Pending Acquisitions, the Company will hold a 
     100% fee interest in each of the Pending Acquisitions, with the 
     exception of 10880 Wilshire Boulevard, in which the Company will hold the
     entire leasehold interest. 


 (3) The Company holds a 1% general partner interest, a 75% limited partner 
     interest and an option to purchase the remaining 24% limited partner 
     interest in the partnership that owns the Center Plaza Property. 

 (4) The Company owns a ground leasehold interest in the South Station 
     Property which expires in 2024 but may be extended, at the Company's 
     option, for two additional 15-year terms. Fee title to this Property is 
     owned by a unaffiliated third party. This Property was originally built 
     in the early 1900s and was fully rehabilitated in 1988. This Property 
     includes a significant retail component. 

 (5) The Wellesley Office Park consists of eight office buildings. 

 (6) The Crosby Corporate Center is a Property which consists of six office 
     buildings. 

 (7) The New England Executive Park Portfolio consists of nine of the 
     thirteen office buildings located in the New England Executive Park, the 
     remaining four of which are owner-occupied. 

 (8) The 245 First Street property consists of two attached structures 
     connected by a four-story atrium. Riverview I, a six-story office 
     building, was constructed in 1909 and renovated in 1986. Riverview II, 
     an eighteen-story structure with parking on the first nine floors, was 
     constructed in 1985. 

 (9) The Perimeter Center Portfolio consists of 32 buildings and six ground 
     leases. 

(10) Approximately 205,000 square feet of the 1333 H Street Property was 
     built in 1982. The remaining approximately 34,000 square feet was 
     renovated in 1982. 


(11) The Tri-State International complex consists of five office buildings. 
     The Company is currently negotiating leases that, if signed, would 
     increase the occupancy rate of this Property to 85%. No assurances can 
     be given that these leases will be signed. 


(12) Presidents Plaza consists of four office buildings. 

(13) Westbrook Corporate Center consists of five office buildings. 


(14) The Westlakes Office Park consists of four office buildings. The Company 
     has entered into a contract to sell the Westlakes Office Park. 


(15) Shoreline Technology Park consists of twelve office buildings. 

(16) Lake Marriott Business Park consists of seven office buildings. 

                                     S-12 

<PAGE> 

                                 The Offering 

   All of the shares of Common Stock offered hereby are being sold by the 
Company. None of the Company's stockholders are selling any Common Stock in 
the Offering. 

<TABLE>
<S>                                                    <C>       
Common Stock Offered                                   7,000,000 
Common Stock Outstanding After the Offering(1)         62,818,979 
Use of Proceeds                                        To purchase the Pending Acquisitions (or repay 
                                                       amounts drawn under the Credit Facility to acquire 
                                                       the Pending Acquisitions), and to repay amounts 
                                                       drawn under the Credit Facility to purchase the 
                                                       Recent Acquisitions 
NYSE Symbol                                            "BCN" 
</TABLE>


(1) Includes 7,702,499 shares of Common Stock that may be issued upon 
    redemption of Units (including Units to be issued in connection with a 
    Pending Acquisition). Such Units are redeemable by the holders for cash or, 
    at the election of the Company, shares of Common Stock on a one-for-one 
    basis. Excludes 3,619,747 shares of Common Stock reserved for issuance 
    pursuant to the Company's 1994 Stock Option Plan, 1996 Stock Option Plan,
    and dividend reinvestment plan. 



                                Distributions 

   The Company regularly pays quarterly distributions on its Common Stock of 
$.4625 per share, which, on an annualized basis, is equal to an annual 
distribution of $1.85 per share of Common Stock. Future distributions by the 
Company will be at the discretion of the Board of Directors and there can be 
no assurance that any such distributions will be made by the Company. 
Distributions by the Company to the extent of its current and accumulated 
earnings and profits for Federal income tax purposes generally will be 
taxable to stockholders as ordinary dividend income. Distributions in excess 
of current and accumulated earnings and profits will be treated as a 
non-taxable reduction of the stockholder's basis in its shares of Common 
Stock to the extent thereof, and thereafter as taxable gain. Distributions 
that are treated as a reduction of the stockholder's basis in its shares of 
Common Stock will have the effect of deferring taxation until the sale of the 
stockholder's shares. 

                    Summary Selected Financial Information 


    The following table sets forth selected financial and operating information
on an as adjusted basis for the Company and on a combined historical basis for
the Company and The Beacon Group, the predecessor entity to the Company (the
"Predecessor" or "Beacon"). The consolidated results of operations of the
Company for the years ended December 31, 1996 and 1995 and for the period May
26, 1994 to December 31, 1994, the combined results of operations of the
Predecessor for the period January 1, 1994 to May 25, 1994 and the combined
historical operating information of the Predecessor for the years ended December
31, 1993 and 1992 have been derived from the financial statements audited by
Coopers & Lybrand L.L.P., independent accountants.


   The unaudited selected pro forma financial and operating information is 
presented as if the Offering, the acquisition of the Properties acquired 
since January 1, 1996 and the acquisition of the Pending Acquisitions had 
occurred as of January 1, 1996, for the condensed consolidated statement of 
operations. The pro forma financial information is not necessarily indicative 
of what the results of operations of the Company would have been for the 
periods indicated, nor does it purport to represent the Company's future 
results of operations. 

                                     S-13 

<PAGE> 

<TABLE>

<CAPTION>
                                                        Beacon Properties Corporation 
                                                   Summary Selected Financial Information 
                                                Company                                  Predecessor 
                            -----------------------------------------------  ----------------------------------- 
                                                                  For the     For the 
                                          For the     For the      Period      Period 
                                            Year        Year      May 26,    January 1,        Years Ended 
                             Pro Forma     Ended       Ended      1994 to     1994 to         December 31, 
                                1996      December    December    December    May 25,    ----------------------- 
                            (unaudited)   31, 1996    31, 1995    31, 1994      1994        1993        1992 
                            ----------- ----------- ----------- ----------- ----------- -----------  ----------- 
                                              (dollars in thousands, except per share amounts) 
OPERATING INFORMATION: 
<S>                           <C>         <C>         <C>         <C>         <C>          <C>         <C>
Revenues: 
 Rental income                $279,573    $147,825    $71,050     $25,144     $ 5,776      $14,315     $11,406 
 Management fees                 3,005       3,005      2,203          --       1,521        3,533       3,331 
 Recoveries from tenants        33,048      16,719      9,742       4,488       1,040        2,349       1,989 
 Mortgage interest income        5,581       4,970      2,546          --          --           --          -- 
 Other income                   17,348      11,272      5,502       2,301         675        2,176       2,003 
                            ----------- ----------- ----------- ----------- ----------- -----------  ----------- 
   Total revenues              338,555     183,791     91,043      31,933       9,012       22,373      18,729 
                            ----------- ----------- ----------- ----------- ----------- -----------  ----------- 
Expenses: 
 Property expenses              69,078      37,211     18,090       7,034       2,086        4,580       4,522 
 Real estate taxes              34,103      18,124     10,217       3,325         595        1,354       1,204 
 General and administrative     24,830      19,331      9,755       3,122       1,399        4,357       4,658 
 Mortgage interest expense      47,162      30,300     15,226       4,992       2,798        7,650       7,203 
 Interest--amortization of 
  financing  costs               2,099       2,084      1,370         617         373          192         138 
 Depreciation and 
  amortization                  64,927      33,184     17,428       6,924       2,385        5,577       5,505 
                            ----------- ----------- ----------- ----------- ----------- -----------  ----------- 
   Total expenses              242,199     140,234     72,086      26,014       9,636       23,710      23,230 
                            ----------- ----------- ----------- ----------- ----------- -----------  ----------- 
Income (loss) from 
  operations                    96,356      43,557     18,957       5,919        (624)      (1,337)     (4,501) 
Equity (loss) in joint 
  ventures and 
  corporations(1)                4,989       4,989      3,234         929         198       (5,953)     (1,544) 
Income (loss) from 
  continuing operations        101,345      48,546     22,191       6,848        (426)      (7,290)     (6,045) 
Discontinued 
  operations-Construction 
  Company: 
 Income (loss) from 
  operations                    (2,609)     (2,609)       (12)        477         102          440         136 
 Loss on sale                     (249)       (249)        --          --          --           --          -- 
                            ----------- ----------- ----------- ----------- ----------- -----------  ----------- 
Income (loss) before 
  minority interest             98,487      45,688     22,179       7,325        (324)      (6,850)     (5,909) 
Minority interest in loss 
  of combined partnerships          --          --         --          --         931        1,539       2,656 
Minority interest in 
  Operating Partnerships       (12,026)     (5,988)    (4,119)     (1,670)         --           --          -- 
                            ----------- ----------- ----------- ----------- ----------- -----------  ----------- 
Income (loss) before 
  extraordinary items         $ 86,461      39,700     18,060       5,655         607       (5,311)     (3,253) 
                            ===========
Extraordinary items, net of 
  minority interest                         (3,368)        --          --       8,898        1,554          -- 
Net income (loss)(2)                      $ 36,332    $18,060     $  5,655     $ 9,505     $(3,757)    $(3,253) 
                                        ==========  ===========  =========== ==========  ===========  ==========
Per Share of Common Stock 
  data: 
 Income from continuing 
   operations                 $   1.61    $   1.41    $  1.09     $  0.45          --           --          -- 
 Discontinued operations- 
   Construction Company: 
 Income (loss) from 
  operations                  $  (0.04)   $  (0.08)   $ (0.00)    $  0.03          --           --          -- 
 Loss on sale                 $  (0.00)   $  (0.01)        --          --          --           --          -- 
 Income before 
  extraordinary items         $   1.57    $   1.32    $  1.09     $  0.48          --           --          -- 
 Extraordinary items                      $  (0.11)        --          --          --           --          -- 
Net income                                $   1.21    $   1.09    $  0.48          --           --          -- 
</TABLE>


                                     S-14 

<PAGE> 

<TABLE>
<CAPTION>
                                                        Beacon Properties Corporation 
                                                   Summary Selected Financial Information 
                                                Company                                  Predecessor 
                            -----------------------------------------------  ----------------------------------- 
                                                                  For the     For the 
                                          For the     For the      Period      Period 
                                            Year        Year      May 26,    January 1,        Years Ended 
                             Pro Forma     Ended       Ended      1994 to     1994 to         December 31, 
                                1996      December    December    December    May 25,    ----------------------- 
                            (unaudited)   31, 1996    31, 1995    31, 1994      1994        1993        1992 
                            ----------- ----------- ----------- ----------- ----------- -----------  ----------- 
                                              (dollars in thousands, except per share amounts) 
<S>                         <C>         <C>         <C>         <C>         <C>         <C>          <C>
Cash dividends declared                 $     1.765 $      1.24 $      0.96         --          --          -- 
Cash dividends paid                     $     1.765 $      1.64 $      0.56         --          --          -- 
Weighted average common 
  shares outstanding         55,116,480  29,932,327  16,525,245  11,816,380         --          --          -- 
BALANCE SHEET INFORMATION: 
 Real estate before 
  accumulated depreciation  $ 2,030,630 $ 1,691,530 $   471,142 $   400,419   $ 82,198    $ 81,220    $ 78,580 
 Total assets                 2,102,426   1,779,412     534,797     400,861     77,470      85,497      93,327 
 Mortgage debt                  588,212     452,212      70,536      90,936     69,240      87,091      86,610 
 Note Payable, Credit 
  Facility                       59,714     153,000     130,500     130,300         --          --          -- 
 Total liabilities              714,425     671,711     239,013     261,100    129,836     143,451     142,015 
 Total equity (deficit)       1,229,450     999,150     258,822     102,038    (52,366)    (57,954)    (48,688) 

 (1) Including deductions 
     for:  Depreciation and 
       amortization         $     4,033 $     4,033 $     2,306 $     3,013 
 (2) Company share of 
     Operating  Partnership       87.79%      86.89%      81.31%      77.20% 
</TABLE>

                                     S-15 

<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 Supplement before 
purchasing Common Stock in the Offering. 

Risks Associated with the Addition of a Substantial Number of New Properties 

   
   The Company is currently experiencing a period of rapid growth. Since 
January 1996, the Company has invested approximately $1.2 billion in office 
properties, increasing its interests in real estate by over 226%. Upon the 
completion of the Pending Acquisitions, the Company will have invested 
approximately $1.5 billion since January 1996, increasing its interests in 
real estate by over 290%. The Company's ability to manage its growth 
effectively will require it to apply successfully its experience managing its 
existing portfolio to new markets and to an increased number of properties. The
Company's results of operations and ability to make expected distributions to
stockholders could be adversely affected if the Company is unable to manage 
these operations effectively. There can be no assurance that the Company will 
be able to manage these operations effectively. 
    

Risks of Adverse Effect on Company from Debt Servicing and Refinancing, 
Increases in Interest Rates, Financial Covenants and Absence of Limitations 
of Debt 


   Debt Financing and Existing Debt Maturities. 


   The Company intends to finance the acquisition of additional properties 
through the use of debt and equity financing. Additionally, in connection 
with the acquisition of certain Properties and Pending Acquisitions for 
Units, the Company has agreed to maintain certain levels of nonrecourse debt 
on the properties in order to minimize the tax consequences of these 
acquisitions to the Unit recipients. The Company is therefore subject to 
risks normally associated with debt financing, including the possibility that 
the Company will have insufficient cash flow to meet required principal and 
interest payments, will be unable to refinance existing indebtedness (which 
in most cases will not be fully amortized at maturity), or will be unable to 
secure favorable refinancing terms. 

   Currently, the Company's total consolidated debt is approximately $604.8 
million, and its total consolidated debt plus its proportionate share of 
total unconsolidated debt (other than Rowes Wharf) is approximately $697.5 
million. The Company (together with an affiliate), and Equitable Life 
Assurance Society of the United States, on behalf of its Prime Property Fund 
("Equitable"), the Company's joint venture partner in Rowes Wharf Associates, 
each hold one-half of the mortgage debt on the Rowes Wharf Property. See 
"Properties--Mortgage Indebtedness and Credit Facility." The Company's 
current consolidated mortgage indebtedness of approximately $451.8 million 
has maturities ranging from 1998 through 2008 and is secured by Properties. 
In addition, the Company currently has $153 million outstanding under its 
Credit Facility. The Company's proportionate share of its current total 
unconsolidated debt (excluding Rowes Wharf) consists of approximately $46.3 
million on the One Post Office Square Property (in which the Company has a 
50% general partner interest) and approximately $46.4 million on the 75-101 
Federal Street Property (in which the Company owns approximately 51.6% of the 
common stock of a private REIT that owns the Property). 

   The Company currently has a policy of incurring debt only if upon such 
incurrence the Company's Debt to Market Capitalization Ratio (as defined 
below) would be 50% or less. For purposes of this policy, the Company's Debt 
to Market Capitalization Ratio is calculated as the Company's proportionate 
share of total consolidated and unconsolidated debt (excluding Rowes Wharf) 
as a percentage of the sum of the market value of outstanding shares of stock 
of the Company and Units plus the Company's proportionate share of total 
consolidated and unconsolidated debt (excluding Rowes Wharf). As noted, the 
Company (together with an affiliate) currently holds one-half of the Rowes 
Wharf mortgage indebtedness. Upon completion of the Offering and the Pending 
Acquisitions, the Company's Debt to Market Capitalization Ratio will be 
approximately 25.2%. Although the Company has adopted a Debt to Market 
Capitalization Ratio policy, 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 and would do so, for example, if it were necessary in order for the 
Company to continue to qualify as a REIT. 


   The Company anticipates that only a small portion of the principal of the 
Company's mortgage indebtedness will be repaid prior to maturity. However, if 
the Company does not have funds sufficient to repay such indebtedness at 
maturity, the Company may need to refinance indebtedness through additional 
debt financing or equity offerings. 

                                     S-16 

<PAGE> 


If the Company is unable to refinance this indebtedness on acceptable terms, 
the Company may be forced to dispose of Properties upon disadvantageous 
terms, which could result in losses to the Company and adversely affect the 
amount of cash available for distribution to stockholders. If prevailing 
interest rates or other economic conditions result in higher interest rates 
at a time when the Company must refinance its indebtedness, the Company's 
interest expense would increase, which would adversely affect the Company's 
results of operations and its ability to pay expected distributions to 
stockholders. Further, if a Property or Properties are mortgaged to secure 
payment of indebtedness and the Company is unable to meet mortgage payments, 
the mortgagee could foreclose or otherwise transfer the Property or 
Properties, with a consequent loss of income and asset value to the Company. 
Even with respect to nonrecourse indebtedness, the lender may have the right 
to recover deficiencies from the Company in certain circumstances, including 
fraud and environmental liabilities. See "Properties--Mortgage Indebtedness 
and Credit Facility." 

   Risk of Adverse Effect of Increase in Market Interest Rates on Variable 
Interest Rates. 


   Outstanding advances under the Credit Facility bear interest at a variable 
rate. The Company may incur additional variable rate indebtedness in the 
future. Accordingly, increases in interest rates could increase the Company's 
interest expense, which could adversely affect the Company's results of 
operations and its ability to pay expected distributions to stockholders. An 
increase in interest expense could also cause the Company to be in default 
under certain Credit Facility covenants. 


Limits on Control and Other Risks Involved in Joint Ownership of Properties 


   The Company holds (i) a 76% general and limited partner interest in the 
property partnership that owns the Center Plaza Property, (ii) a 50% general 
partner interest in the property partnership that owns the One Post Office 
Square Property, (iii) a 90% limited partner interest (through Beacon 
Property Management Corporation and Beacon Construction Company, Inc.) in 
Rowes Wharf Limited Partnership (a limited partnership that owns a 50% 
general partner interest in Rowes Wharf Associates, the entity that owns the 
hotel space and leases the office and retail space at the Rowes Wharf 
Property), (iv) a 10% general and limited partner interest in the property 
partnership that owns the Polk and Taylor Buildings Property, and (v) 
approximately 51.6% of the common stock of a private REIT that holds a direct 
fee interest in the 75-101 Federal Street Property. The Company is not in a 
position to exercise sole decision making authority regarding One Post Office 
Square, Rowes Wharf, the Polk and Taylor Buildings, or 75-101 Federal Street. 
However, the Company is responsible for the day-to-day affairs of each of 
these Properties. 

   Joint ownership of Properties may, under certain circumstances, involve 
risks not otherwise present in wholly- owned properties. Such risks include 
the possibility that the Company's partners or co-investors might become 
bankrupt, develop business interests or goals inconsistent with the business 
interests or goals of the Company, or take action contrary to the 
instructions or requests of the Company or contrary to the Company's policies 
or objectives, including the Company's policy with respect to maintaining its 
qualification as a REIT. Joint ownership also involves the potential risk of 
impasse on decisions, such as a sale, because neither the Company nor the 
partners or co-investors have full control over the entity owning the 
Property. Consequently, actions by such partners or co-investors might result 
in subjecting jointly-owned Properties to additional risk. 

   The Company will, however, seek to maintain sufficient control of the 
entities holding jointly-owned Properties to permit the Company's business 
objectives to be achieved. Any capital contribution by the Company or the 
Operating Partnership to the property partnerships that own (directly or 
indirectly) the Rowes Wharf and Center Plaza Properties requires the approval 
of the Directors of the Company who are neither officers of the Company nor 
affiliated with The Beacon Companies. The Company's organizational documents 
do not limit the amount of available funds that may be invested in 
partnerships, joint ventures, or co-investments. 


Limits on Ownership May Deter Changes in Management 

   In order to maintain its REIT qualification, not more than 50% in value of 
the outstanding capital stock of the Company may be owned, directly or 
indirectly, by five or fewer individuals (as defined in the Internal Revenue 
Code of 1986, as amended (the "Code"), to include certain entities) during 
the last half of a taxable year (other than the first year) (the "Five or 
Fewer Requirement"). In order to protect the Company against the risk of 
losing its REIT status due to a concentration of ownership among its 
stockholders, the Articles of Incorporation of the Company limit ownership of 
the issued and outstanding Common Stock by any single stockholder to 6.0% of 
the 



                                     S-17 

<PAGE> 


aggregate value of the Company's shares of capital stock from time to time; 
provided, however, that entities whose ownership of Common Stock is 
attributed to the beneficial owners of such entities for purposes of the Five 
and Fewer Requirement (such as pension trusts qualifying under Section 401(a) 
of the Code, United States investment companies registered under the 
Investment Company Act of 1940, as amended, partnerships, trusts, and 
corporations) are limited by the Company's Articles of Incorporation to 
holding no more than 9.9% of the aggregate value of the Company's shares of 
Common Stock. The Articles of Incorporation provide that the Board of 
Directors can waive these ownership limitations if the Board is satisfied, 
based upon the advice of tax counsel, that ownership in excess of these 
limits will not jeopardize the Company's status as a REIT, and further, that 
such waiver would be in the best interest of the Company. A transfer of 
shares to a person who, as a result of the transfer, would violate the 
ownership limitations will be void. Shares acquired or transferred in breach 
of the ownership limitations will be automatically converted into shares not 
entitled to vote or to participate in dividends or other distributions. In 
addition, shares acquired or transferred in breach of the ownership 
limitations may be purchased by the Company for the lesser of the price paid 
and the average closing price for the ten trading days immediately preceding 
redemption. 


Real Estate Investment Risks 

   General Risks. 


   Investments of the Company are subject to the risks incident to the 
ownership and operation of commercial real estate generally. The yields 
available from equity investments in real estate depend on the amount of 
income generated and expenses incurred. If the Company's Properties do not 
generate revenues sufficient to meet operating expenses, including debt 
service and capital expenditures, the Company's results of operations and 
ability to make distributions to its stockholders will be adversely affected. 


   A commercial property's revenues and value may be adversely affected by a 
number of factors, including the national, state and local economic climate; 
real estate conditions (such as oversupply of or reduced demand for space and 
changes in market rental rates); the perceptions of prospective tenants of 
the safety, convenience and attractiveness of the properties; the ability of 
the owner to provide adequate management, maintenance and insurance; the 
ability to collect all rent from tenants on a timely basis; the expense of 
periodically renovating, repairing and reletting spaces; and the increase of 
operating costs (including real estate taxes and utilities) that may not be 
passed through to tenants. Certain significant expenditures associated with 
investments in real estate (such as mortgage payments, real estate taxes, 
insurance and maintenance costs) are generally not reduced when circumstances 
cause a reduction in rental revenues from the property. If a property is 
mortgaged to secure the payment of indebtedness and if the Company is unable 
to meet its mortgage payments, a loss could be sustained as a result of 
foreclosure on the property or the exercise of other remedies by the 
mortgagee. In addition, real estate values and income from properties are 
also affected by such factors as compliance with laws, including tax laws, 
interest rate levels and the availability of financing. 


   Risks of Acquisition Activities. 


   The Company intends to acquire existing office and commercial properties 
to the extent that they can be acquired on advantageous terms and meet the 
Company's investment criteria. In light of current conditions in the 
Company's target market areas, the Company anticipates that in the near 
future additional properties will be added to the Company's portfolio through 
acquisitions rather than new development and construction. Acquisitions of 
commercial properties entail general investment risks associated with any 
real estate investment, including the risk that investments will fail to 
perform as expected or that estimates of the cost of improvements to bring an 
acquired property up to standards established for the intended market 
position may prove inaccurate. 


   Risks of Development Activities. 

   The Company also intends to continue the development of office and other 
commercial properties, in accordance with the Company's development and 
underwriting policies as opportunities arise in the future. Risks associated 
with such development activities include the risk that: the Company may 
abandon development opportunities after expending resources to determine 
feasibility; construction costs of a project may exceed original estimates; 
occupancy rates and rents at a newly completed property may not be sufficient 
to make the properties 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. 



                                     S-18 

<PAGE> 

Development activities are also subject to risks relating to the inability to 
obtain, or delays in obtaining, all necessary zoning, land-use, building, 
occupancy, and other required governmental permits and authorizations. If any 
of the foregoing occurs, the Company's ability to make expected distributions 
to stockholders could be adversely affected. In addition, new development 
activities, regardless of whether or not they are ultimately successful, 
typically require a substantial portion of management's time and attention. 

   The Company anticipates that future development will be financed, in whole 
or in part, through additional equity offerings or under lines of credit or 
other forms of secured or unsecured construction financing that will result 
in the risk that, upon completion of construction, permanent financing for 
newly developed properties may not be available or may be available only on 
disadvantageous terms. If a project is unsuccessful, the Company's losses may 
exceed its investment in the project. 


   Potential Adverse Effect on Results of Operations Due to Risks Associated 
With Tenant Defaults. 


   Substantially all of the Company's income is derived from rental income 
from real property. Consequently, the Company's results of operations and 
ability to make expected distributions to stockholders could be adversely 
affected if a significant number of tenants at the Properties failed to meet 
their lease obligations. In the event of a default by a lessee, the Company 
may experience delays in enforcing its rights as lessor and may incur 
substantial costs in protecting its investment. Additionally, as a 
significant number of the Company's tenants are in the financial services, 
legal and accounting businesses, the Company's results of operations and 
ability to make expected distributions to stockholders would be adversely 
affected if these industries experienced a significant reduction in 
workforce. At any time, a tenant of the Properties may also seek protection 
under the bankruptcy laws, which could result in rejection and termination of 
such tenant's lease and thereby cause a reduction in the cash available for 
distribution by the Company. If a tenant rejects its lease, the Company's 
claim for breach of the lease would (absent collateral securing the claim) be 
treated as a general unsecured claim. The amount of the claim would be capped 
at the amount owed for unpaid pre-petition lease payments unrelated to the 
rejection, plus the greater of one year's lease payment or 15% of the 
remaining lease payments payable under the lease (but not to exceed the 
amount of three years' lease payments). No assurance can be given that the 
Company will not experience significant tenant defaults in the future. 


   Potential Adverse Effect on Results of Operations Due to Risks Associated 
With Ground Leases. 

   
    Two of the Properties and 10880 Wilshire Boulevard, a Pending Acquisition,
are the subject of long-term ground leases. In the case of the lease on the
office and retail portions of the Rowes Wharf Property, the landlord becomes the
owner of the portion of the Property subject to the lease at the expiration of
the term of the lease or at the earlier termination by reason of a breach of the
lease by the tenant. The lease on the Rowes Wharf Property, which expires in
2065, does not contain an extension option but includes an option to purchase.
The ground lease on the South Station Property expires in 2024. The landlord
becomes the owner of the South Station Property at the expiration of the term of
the ground lease or at the earlier termination by reason of a breach of the
lease by the tenant. The Company will have the right to extend the lease for two
additional 15-year terms, subject to the landlord's right to terminate such
additional periods upon two years' notice and payment to the Company of certain
termination payments. The ground lease at 10880 Wilshire Boulevard expires in
2068. The Company will have an option to purchase the ground under 10880
Wilshire Boulevard at fair market value in 2001. The Company's results of
operations and ability to make expected distributions to stockholders could be
adversely affected to the extent the Properties subject to ground leases revert
back to the landlord at the termination of the ground lease or the Company
incurs additional expense by purchasing the ground under these Properties at the
termination of these ground leases.
    

   Potential Adverse Effect on Results of Operations Due to Risks Associated 
With Market Illiquidity. 

   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, such as changes in 
the local or national real estate market. In addition, provisions of the Code 
limit the Company'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. 

   Potential Adverse Effect on Results of Operations Due to Operating Risks. 

   The Properties are subject to operating risks common to commercial real 
estate in general, any and all of which may adversely affect occupancy or 
rental rates. The Properties are subject to increases in operating expenses 
such as cleaning, electricity, heating, ventilation and air conditioning; 
elevator repair and maintenance; insurance and administrative costs; and 
other general costs associated with security, landscaping, repairs and 
maintenance. While the Company's tenants are currently obligated to pay these 
escalating costs, there can be no assurance that tenants 



                                     S-19 

<PAGE> 

will agree to pay such costs upon renewal or that new tenants will agree to 
pay such costs. If operating expenses increase, the local rental market may 
limit the extent to which rents may be increased to meet such increased 
expenses without decreasing occupancy rates. While the Company implements 
cost-saving incentive measures at each of its Properties, if any of the 
foregoing occurs, the Company's results of operations and its ability to make 
distributions to stockholders could be adversely affected. 

Risk of Investment in Mortgage Debt 


   The Company may invest in mortgages that are secured by existing office 
and commercial properties in circumstances where the Company anticipates that 
such investments may result in the Company's acquisition of the related 
properties through foreclosure proceedings or negotiated settlements. In 
addition to the risks associated with investments in commercial office 
properties, investments in mortgage indebtedness present the additional risks 
that the fee owners of such properties may default in payments of interest on 
a current basis or file for bankruptcy, which may stay the Company's 
foreclosure of such mortgages and receipt of payments thereunder. Under such 
circumstances, the Company may not realize its anticipated investment return, 
and may sustain losses relating to such investments. 

Risk of Adverse Effect on Results of Operations due to Possible Environmental 
Liabilities 


   The Company's operating costs may be affected by the obligation to pay for 
the cost of complying with existing environmental laws, ordinances and 
regulations, as well as the cost of complying with future legislation. Under 
various federal, state and local environmental laws, ordinances and 
regulations, a current or previous owner or operator of real property may be 
liable for the costs of removal or remediation of hazardous or toxic 
substances on, under, or in such property. Such laws often impose liability 
whether or not the owner or operator knew of, or was responsible for, the 
presence of such hazardous or toxic substances. In addition, the presence of 
hazardous or toxic substances, or the failure to remediate such property 
properly, may adversely affect the owner's ability to borrow by using such 
real property as collateral. Persons who arrange for the transportation, 
disposal or treatment of hazardous or toxic substances may also be liable for 
the costs of removal or remediation of such substances at the disposal or 
treatment facility, whether or not such facility is or ever was owned or 
operated by such person. Certain environmental laws and common law principles 
could be used to impose liability for releases of hazardous materials, 
including asbestos-containing materials ("ACMs"), into the environment, and 
third parties may seek recovery from owners or operators of real properties 
for personal injury associated with exposure to released ACMs or other 
hazardous materials. Environmental laws may also impose restrictions on the 
manner in which a property may be used or transferred or in which businesses 
may be operated, and these restrictions may require expenditures. In 
connection with the ownership and operation of the Properties, the Company 
may be potentially liable for any such costs. The cost of defending against 
claims of liability or remediating contaminated property and the cost of 
complying with such environmental laws could materially adversely affect the 
Company's results of operations and financial condition. 

   Phase I environmental site assessments ("ESAs") have been conducted at all 
of the Properties by qualified independent environmental engineers. The 
purpose of Phase I ESAs is to identify potential sources of contamination for 
which the Properties may be responsible and to assess the status of 
environmental regulatory compliance. The ESAs have not revealed any 
environmental liability or compliance concerns that the Company believes 
would have a material adverse affect on the Company's business, assets, 
results of operations or liquidity, nor is the Company aware of any such 
liability or concerns. Nevertheless, it is possible that these ESAs did not 
reveal all environmental liabilities or compliance concerns or that material 
environmental liabilities or compliance concerns exist of which the Company 
is currently unaware. 


   The Company has not been notified by any governmental authority, and has 
no other knowledge of, any material noncompliance, liability or claim 
relating to hazardous or toxic substances or other environmental substances 
in connection with any of its Properties except as previously disclosed in 
documents incorporated herein by reference or as noted below. 

Possible Additional Risks Associated with Investments in Subsidiaries 

   The capital stock of each of Beacon Property Management Corporation, 
Beacon Construction Company, Inc. and Beacon Design Corporation 
(collectively, the "Subsidiary Corporations") is divided into two classes: 
voting and nonvoting common stock. Of the voting common stock, 99% is held by 
officers and/or directors of such 



                                     S-20 

<PAGE> 

Subsidiary Corporations (each of whom, as of the date of this Prospectus 
Supplement, is also an officer and/or director of the Company) and 1% is held 
by the Operating Partnership. Of the nonvoting common stock, 100% is held by 
the Operating Partnership. Management's 99% voting common stock represents 1% 
of the economic interests in each of the Subsidiary Corporations. Members of 
each Subsidiary Corporation's management, as the holders of 99% of the voting 
common stock, retain the ability to elect the board of directors of each of 
the Subsidiary Corporations. Although the nonvoting common stock and the 
voting common stock of each of the Subsidiary Corporations held by the 
Company represents 99% of the economic interests in such corporations, the 
Company is not able to elect directors. Its ability to influence the 
day-to-day decisions affecting these corporations may therefore be limited. 
As a result, the board of directors and management of each of the Subsidiary 
Corporations may implement business policies or decisions that would not have 
been implemented by persons controlled by the Company, and that are adverse 
to the interests of the Company or that could adversely impact the Company's 
results of operations. The bylaws of each of the Subsidiary Corporations 
require that the voting common stock in such Subsidiary Corporation be held 
by officers of such Subsidiary Corporation at all times and require holders 
of voting common stock to enter into an agreement to that effect. 


Adverse Effect of Increase in 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 is the annual yield on the price paid for shares of 
Common Stock from distributions by the Company. An increase in market 
interest rates may lead prospective purchasers of the Common Stock to demand 
a higher annual yield from future distributions. Such an increase in the 
required distributions yield may adversely affect the market price of the 
Common Stock. 

                                     S-21 

<PAGE> 

                                 THE COMPANY 

General 

   The Company is a self-administered and self-managed REIT which owns a 
portfolio of Class A office properties and other commercial properties 
located in major metropolitan areas, including Boston, Atlanta, Chicago, Los 
Angeles, San Francisco and Washington, D.C., as well as commercial real 
estate development, acquisition, leasing and management businesses. Class A 
office properties generally are considered to be those that have excellent 
locations and access, attract high quality tenants, are well maintained and 
professionally managed, and achieve among the highest rent, occupancy and 
tenant retention rates within their markets. The Properties comprise 
approximately 15.8 million rentable square feet in the aggregate and, as of 
December 31, 1996, were approximately 96% leased with over 1,100 tenants. 


   The Company is currently experiencing a period of rapid growth. Upon 
completion of the Pending Acquisitions, the Company will have invested 
approximately $1.5 billion in office properties since January 1996, 
increasing its interests in real estate by over 290%. The Company has entered 
into contracts to acquire the Pending Acquisitions for aggregate 
consideration of approximately $339.1 million. If all of the Pending 
Acquisitions are consummated, the Company will own or have an interest in 112 
income producing commercial properties encompassing approximately 17.8 
million rentable square feet, approximately 79% of which will be located in 
suburban office markets and approximately 21% of which will be located in 
downtown office markets, primarily in Boston. Assuming the consummation of 
all of the Pending Acquisitions, the Company will have a total market 
capitalization of approximately $2.9 billion. 

    The Company's business is conducted principally through the Operating
Partnership, two subsidiary corporations and two subsidiary limited
partnerships. The Company conducts third-party management operations through the
Management Company and conducts third-party tenant space design services through
the Design Company. Through the Management Company, the Company manages
approximately 2.9 million square feet of commercial and office space owned by
third parties in various locations including Boston and Springfield,
Massachusetts and Chicago, Illinois. The Company conducts management operations
for wholly-owned properties through the Management Partnership, and conducts
tenant space design services for wholly-owned properties through the Design
Partnership.


   The Company's executive offices are located at 50 Rowes Wharf in Boston, 
Massachusetts 02110 and its telephone number at that location is (617) 
330-1400. 

                             RECENT DEVELOPMENTS 

Recent Acquisitions 

   Silicon Valley Office/R&D Market 


   Shoreline Technology Park and Lake Marriott Business Park. In December 
1996, the Company acquired Shoreline Technology Park and Lake Marriott 
Business Park for aggregate consideration of approximately $184 million 
(including approximately $1 million of expected non-recurring capital 
expenditures). The Company purchased the Properties from Teachers Insurance 
and Annuity Association. 

   
    The Shoreline Technology Park is a 12-building complex developed between
1985 and 1991 which encompasses approximately 727,000 square feet. Shoreline
Technology Park is the headquarters of Silicon Graphics, Inc., which is the sole
tenant of the Property. The Lake Marriott Business Park is a 7-building complex
developed in 1981 which encompasses approximately 400,000 square feet. Major
tenants in the Lake Marriott Business Park include Silicon Valley Bank
(approximately 101,000 square feet) and Hitachi Computer Products (America),
Inc. (approximately 97,000 square feet). The Shoreline Technology Park and
substantially all of the Lake Marriott Business Park are currently leased on a
"triple-net" basis. The aggregate occupancy rate of both Properties as of
December 31, 1996 was 100%.
    

   Shoreline Technology Park and Lake Marriott Business Park are located in 
the Silicon Valley Office/R&D Market. According to Cornish & Carey, the 
Silicon Valley Office/R&D Market, which consists of approximately 129 million 
rentable square feet, had an overall vacancy rate of 5.3% as of December 31, 
1996. Cornish & Carey 



                                     S-22 

<PAGE> 

also reports that the Silicon Valley Office/R&D Market experienced Net 
Absorption of approximately 1.7 million square feet in 1996. 

   Shoreline Technology Park and Lake Marriott Business Park represent the 
Company's first acquisitions in the Silicon Valley Office/R&D Market. As part 
of its continuing analysis of major office markets and investment 
opportunities, the Company has determined that the San Francisco and San Jose 
metropolitan areas possess attractive market fundamentals, including growth 
in office-using employment. According to the U.S. Bureau of Labor Statistics, 
during the twelve months ended November 30, 1996, approximately 13,400 
office-using jobs were created in the San Francisco and San Jose metropolitan 
area, primarily in business services including multi-media, computer software 
and hardware and consulting. The Company has further determined that the 
Silicon Valley Office/R&D Market is particularly attractive due to its high 
concentration of knowledge-based industries including biotechnology, 
communications, and computer hardware and software as well as its proximity 
to major universities. Additionally, the Company believes there is 
substantial constraint on new supply of office space in the Silicon Valley 
Office/R&D Market due to geographic barriers and the high cost of land. 


   Based upon its survey of brokers in the market and other internal 
research, the Company believes that the existing rental rates per square foot 
at Shoreline Technology Park and Lake Marriott Business Park are below 
current market rates by approximately $7 to $9 and $5 to $7, respectively. 
The Company expects that the net operating income generated by the Properties 
will increase as current leases are renewed, and new leases are made, at 
current market rates, although no assurances can be made in this regard. The 
Company expects to incur certain tenant improvement costs and leasing 
commissions in connection with the releasing of this space. 


   For a description of the Silicon Valley Office/R&D Market, see "Properties 
and Pending Acquisitions." 

   Suburban Chicago Office Market 

   Presidents Plaza. In December 1996, the Company acquired Presidents Plaza 
from MetLife. Aggregate consideration for Presidents Plaza consisted of 
1,171,500 Units issued to MetLife (valued at approximately $39 million at the 
closing of the acquisition) and approximately $38 million in cash. In 
addition, the Company expects to incur approximately $1 million of 
non-recurring capital expenditures at the Property. The Company estimates 
that the aggregate purchase price for Presidents Plaza is approximately 60% 
of replacement cost. 


   Presidents Plaza, located at 8600 and 8700 West Bryn Mawr Avenue near 
O'Hare International Airport, consists of two sets of 10- and 12-story towers 
encompassing an aggregate of approximately 791,000 square feet. The Property 
was developed between 1980 and 1982. Major tenants at the Property include 
Cotter & Co. (approximately 175,000 square feet), Wilson Sporting Goods Co. 
(approximately 109,000 square feet) and Gas Research Institute (approximately 
97,000 square feet). As of December 31, 1996, the Property was approximately 
90% leased. 

   Presidents Plaza is located in the O'Hare submarket of the Suburban 
Chicago Office Market. With the acquisition of Presidents Plaza, the Company 
increased its holdings of office properties in the Suburban Chicago Office 
Market to approximately 1.6 million square feet. According to Grubb & Ellis, 
the entire suburban Chicago Office Market had an overall vacancy rate of 
11.2% as of December 31, 1996, while the O'Hare submarket had a vacancy rate 
of 14.8% for the same period. Grubb & Ellis also reports that the O'Hare 
submarket experienced Net Absorption of approximately 242,000 square feet in 
1996. The Company believes that the Suburban Chicago Office Market possesses 
attractive market fundamentals, as evidenced by the creation of approximately 
34,000 office-using jobs in the Chicago metropolitan area during the twelve 
months ended November 30, 1996, according to the U.S. Bureau of Labor 
Statistics. For a description of the Suburban Chicago Office Market, see 
"Properties and Pending Acquisitions." 


Pending Acquisitions 


   The Company has entered into contracts to purchase the Pending 
Acquisitions for aggregate consideration of approximately $339.1 million 
(including approximately $2.2 million in non-recurring capital expenditures). 
The Company currently expects to complete the purchase of the Pending 
Acquisitions during the second quarter of 1997. However, the purchase of each 
of the Pending Acquisitions is subject to various closing conditions. 
Accordingly, no assurances can be made that the Company will acquire any or 
all of the Pending Acquisitions. 


   In addition to the Pending Acquisitions, as part of its ongoing business, 
the Company continually engages in discussions with public and private real 
estate entities regarding possible portfolio or single asset acquisitions in 

                                     S-23 

<PAGE> 

various major metropolitan areas. No assurances can be made that the Company 
will acquire any of the property opportunities currently under review. 

   The following describes each of the Pending Acquisitions. 

   Suburban Chicago Office Market 


   
    Westbrook Corporate Center. In March 1997, the Company entered into a
contract to acquire Westbrook Corporate Center, a five-building office complex
located in Westchester (suburban Chicago), Illinois. The purchase price of the
property is approximately $182.1 million, consisting of the expected assumption
of approximately $106 million of mortgage debt, the issuance of approximately
$50 million of Units and approximately $26.1 million in cash. The sellers of
Westbrook Corporate Center are currently negotiating with their existing lender
regarding this indebtedness. If the sellers successfully negotiate the terms of
such indebtedness, the Company will assume such indebtedness upon the closing of
the acquisition. Alternatively, the Company will secure nonrecourse indebtedness
on the property in connection with the consummation of the acquisition. The
Company estimates that the aggregate purchase price for the Westbrook Corporate
Center is approximately 90% of replacement cost. In addition, the Company has
also contracted to purchase a 10-acre parcel of land suitable for development
which is contiguous to the property for $3.5 million within twelve months of 
the acquisition.
    

   The Company has agreed to maintain at least $106 million of nonrecourse 
indebtedness outstanding on the property and not to dispose of the real 
estate for ten years. If the Company should choose to modify the financing or 
dispose of the real estate within this time period it may be required to make 
payments to the seller.

   
   Westbrook Corporate Center consists of five 10-story office buildings 
comprising an aggregate of approximately 1.1 million square feet. The 
buildings each contain approximately 220,000 square feet and were developed 
between 1985 and 1996. Major tenants in the Westbrook Corporate Center 
include Navistar International Corporation (approximately 100,000 square 
feet), Ameritech (approximately 70,000 square feet), Peoplesoft 
(approximately 53,000 square feet), Premier Health (approximately 45,000 
square feet) and SAP America (approximately 55,000 square feet). The 
aggregate occupancy rate for the Westbrook Corporate Center as of December 
31, 1996 was approximately 90%. Nearly all of the vacancy at the property is 
attributable to the newest building in the complex which opened in February 
1996. 
    


   Westbrook Corporate Center is located in the East-West Corridor of the 
Suburban Chicago Office Market. The Company currently owns approximately 1.6 
million square feet of office Properties in the Suburban Chicago Office 
Market. According to Grubb & Ellis, the entire Suburban Chicago Office Market 
had an overall vacancy rate of 11.2% as of December 31, 1996, while the 
East-West Corridor submarket had a vacancy rate of 9.8% for the same period. 
Grubb & Ellis also reports that the East-West Corridor submarket experienced 
Net Absorption of approximately 524,000 square feet for 1996. The Company 
believes that the Suburban Chicago Office Market possesses attractive market 
fundamentals, as evidenced by the creation of approximately 34,000 
office-using jobs in the Chicago metropolitan area during the twelve months 
ended November 30, 1996, according to the U.S. Bureau of Labor Statistics. 
For a description of the Suburban Chicago Office Market, see "Properties and 
Pending Acquisitions." 

   West Los Angeles Office Market 


   10880 Wilshire Boulevard. In March 1997, the Company entered into a 
contract to acquire the leasehold interest in 10880 Wilshire Boulevard 
located in Westwood, California. The ground lessor of 10880 Wilshire 
Boulevard has a right of first refusal on the sale of this property. The 
Company expects that the ground lessor will not exercise its right of first 
refusal in connection with the Company's purchase of this property. In 
connection with the acquisition, the Company will also acquire the right to 
purchase the fee interest in the land underlying 10880 Wilshire Boulevard at 
fair market value in 2001. 

   The Company will acquire the leasehold interest in 10880 Wilshire 
Boulevard for aggregate consideration of approximately $102 million in cash 
(including approximately $2.2 million in expected non-recurring capital 
expenditures), approximately 75% of replacement cost. 


   The 10880 Wilshire Boulevard property was built in 1970 and has undergone 
approximately $34 million of capital improvements since 1992. The property 
consists of approximately 531,000 square feet in a 23-story office 

                                     S-24 

<PAGE> 

   
building. This property is one of the largest buildings in the Westwood
submarket of the West Los Angeles Office Market and given the current
constraints on development described below, this property cannot be duplicated
in its market. The property is located near Interstates 405 and 10 with easy
access to other West Los Angeles markets, downtown, the San Fernando Valley and
the Los Angeles airport. In addition, the property, which meets current
earthquake construction codes, is located in a business district, adjacent to
other Class A office buildings, Westwood Village, a retail area, and the UCLA
campus. Major tenants in 10880 Wilshire Boulevard include Showtime/Viacom
International Inc. (approximately 68,000 square feet), Corporate Media Partners
(approximately 64,000 square feet), Oppenheimer & Co., Inc. (approximately
50,000 square feet) and Pardee Construction Company (approximately 33,000 square
feet). The Company currently intends to retain the existing property manager of
10880 Wilshire Boulevard following the consummation of the acquisition to
facilitate the leasing and management of the property. As of December 31, 1996,
the occupancy rate for 10880 Wilshire Boulevard was approximately 85%.
    

   With the acquisition of 10880 Wilshire Boulevard, the Company will own 
approximately 1.1 million square feet of office space in the Westwood 
submarket of the West Los Angeles Office Market. According to CB Commercial, 
the entire West Los Angeles Office Market (consisting of approximately 34 
million square feet) had an overall vacancy rate of 11.4% as of December 31, 
1996, while the Westwood submarket (consisting of approximately 2.7 million 
square feet) experienced a vacancy rate of 9.1% for the same period. CB 
Commercial also reports that the West Los Angeles Office Market experienced 
Net Absorption of approximately 600,000 square feet in 1996. According to the 
U.S. Bureau of Labor Statistics, during the twelve months ended November 30, 
1996, approximately 51,000 office-using jobs were created in the Los Angeles 
metropolitan area, primarily in the entertainment, export/import, healthcare, 
telecommunications and aerospace industries. Additionally, limited sites are 
available for development in the Westwood submarket and this submarket has 
significant constraints on development including substantial development fees 
and/or the limitation of new development to 1.5 floor-area-ratio with 
five-story height limitations. For a description of the West Los Angeles 
Office Market, see "Properties and Pending Acquisitions." 

   The Company expects that the net operating income (excluding the effect of 
straight-line rents) generated by the property will increase $2.0 million and 
$600,000, respectively during 1998 and 1999 as free rent provisions in 
current leases expire. Additionally, the Company expects that the net 
operating income generated by the property will further increase as new 
leases are made at market rates, although no assurances can be made in this 
regard. Approximately 78,000 square feet at the property is currently 
available for occupancy. The Company expects to incur certain tenant 
improvement costs and leasing commissions in connection with the leasing of 
this space. 


   The Fairfax County, Virginia Market 

    Centerpointe I and II. In March 1997, the Company entered into a contract to
acquire Centerpointe I and II for aggregate consideration of approximately $55
million, consisting of approximately $25 million in cash and the assumption of
approximately $30 million of mortgage debt. The Company estimates that the
aggregate purchase price for Centerpointe I and II is approximately 75% of
replacement cost.

   
    The Centerpointe property contains approximately 409,000 square feet and
consists of (i) Centerpointe I, an 11-story office building built in 1988 and
comprising approximately 204,500 square feet and (ii) Centerpointe II, an
11-story office building built in 1990 comprising approximately 204,500 square
feet. The sole tenant at Centerpointe I is American Management Systems, Inc.,
which also occupies approximately 100,000 square feet in Centerpointe II. Other
major tenants at Centerpointe II include Fujitsu Business Communications
Systems, Inc. (approximately 20,000 square feet) and Liberty Mutual Insurance
Company (approximately 15,000 square feet). As of December 31, 1996, the
aggregate occupancy rate for Centerpointe I and II was approximately 100%.
    

   In connection with the acquisition of Centerpointe I and II, the Company 
has also entered into an option/put arrangement with the sellers of 
Centerpointe I and II on an adjacent 7.8 acre parcel of land suitable for 
development. The Company believes that this parcel could support up to 
approximately 340,000 square feet of office space, subject to obtaining 
appropriate permitting. 


   Centerpointe I and II are located in the Fairfax County, Virginia market. 
The Company currently owns approximately 550,000 square feet of office 
Properties in Fairfax County, Virginia. According to Grubb & Ellis, the 
Fairfax County, Virginia Market had an overall vacancy rate of 6.7% as of 
December 31, 1996 and experienced Net Absorption of approximately 3.3 million 
square feet for 1996. For a description of the Fairfax County, Virginia 
Market, see "Properties and Pending Acquisitions." 

                                     S-25 
<PAGE> 


Capitalization Rates 


   The following table sets forth the Capitalization Rates for the Recent 
Acquisitions and the Pending Acquisitions. The Capitalization Rates are 
calculated by dividing (a) the expected net operating income (including the 
effect of any straight-line rents) generated by the property based upon 
annualized revenues from signed leases in place at the property as of March 
1, 1997 by (b) the consideration paid for the property, including any 
expected capital improvements. 


<TABLE>
<CAPTION>
                                                                Expected 
                                                              Net Operating   Consideration   Capitalization 
Property/Pending Acquisition(1)                                  Income           Paid             Rate 
- -------------------------------                              --------------- ---------------  ---------------- 
                                                               (millions)      (millions) 
<S>                                                               <C>            <C>               <C>
Shoreline Technology Park/Lake Marriott Business Park(2)          $17.5          $184.0             9.5%
Presidents Plaza(3)                                                 8.5            78.0            10.9%
Westbrook Corporate Center(4)                                      18.3           182.1            10.1%
10880 Wilshire Boulevard(5)                                         8.2           102.0             8.0%
Centerpointe I and II(6)                                            5.5            55.0            10.0%
                                                             --------------- ---------------  ---------------- 
  Total/Weighted Average                                          $58.0          $601.1             9.6%
                                                             =============== ===============  ================ 
</TABLE>

(1) Pending Acquisitions appear in italics. 

(2) Net operating income includes approximately $725,000 of straight-line 
    rents. Consideration Paid includes approximately $1 million of expected 
    non-recurring capital expenditures. The Company expects that net 
    operating income (excluding the effect of straight-line rents) will 
    increase by approximately $475,000 and $320,000, respectively, during 
    1998 and 1999 due to contractual rent increases scheduled to occur during 
    those periods. 

(3) Net operating income includes approximately $2.84 million of 
    straight-line rents. Consideration Paid includes approximately $1 million 
    of expected non-recurring capital expenditures. The Company expects that 
    net operating income (excluding the effect of straight-line rents) will 
    increase by approximately $640,000 and $670,000, respectively, during 
    1998 and 1999 due to contractual rent increases scheduled to occur during 
    those periods. 

(4) Net operating income includes approximately $1.2 million of straight-line 
    rents. The Company expects that net operating income (excluding the 
    effect of straight-line rents) will increase by approximately $1.2 
    million and $385,000, respectively, during 1998 and 1999 due to 
    contractual rent increases scheduled to occur during those periods. 
    Additionally, the Company expects that net operating income will increase 
    as vacant space in the newest building in the complex which opened in 
    February 1996 is leased, however, no assurances can be made in this 
    regard. The Return on Equity (as defined below) invested by the Company 
    in the Westbrook Corporate Center is expected to be 12.9%. Return on 
    Equity is calculated by dividing (a) the expected net operating income 
    (including the effect of straight line rents) generated by the property 
    based upon annualized revenues from signed leases in place at the 
    property as of March 1, 1997 less expected debt service on the Expected 
    Westbrook Debt by (b) the consideration paid for the property less the 
    principal amount of the Expected Westbrook Debt. 

(5) Net operating income includes approximately $2.7 million of straight-line 
    rents. Consideration Paid includes approximately $2.2 million of 
    expected non-recurring capital expenditures. As discussed above, the 
    Company expects that net operating income (excluding the effect of 
    straight-line rents) will increase approximately $2.0 million and 
    $600,000, respectively, during 1998 and 1999 as free rent provisions in 
    current leases expire. The Company also expects that net operating income 
    (excluding the effect of straight-line rents) will increase by 
    approximately $195,000 and $210,000, respectively, during 1998 and 1999 
    due to contractual rent increases scheduled to occur during those 
    periods. Additionally, the Company expects that net operating income will 
    further increase as new leases are made at market rates, although no 
    assurance can be made in this regard. 

(6) Net operating income includes approximately $800,000 of straight-line 
    rents. The Company expects that net operating income (excluding the 
    effect of straight-line rents) will increase by approximately $270,000 
    and $420,000, respectively, during 1998 and 1999 due to contractual rent 
    increases scheduled to occur during those periods. The Return on Equity 
    invested by the Company in Centerpointe I and II is expected to be 13.3%. 
    Return on Equity is calculated by dividing (a) the expected net operating 
    income (including the effect of straight line rents) generated by the 
    property based upon annualized revenues from signed leases in place at 
    the property as of March 1, 1997, less expected debt service on the Expected
    Centerpointe Debt by (b) the consideration paid for the property less the
    principal amount of the Expected Centerpointe Debt. 


                                     S-26 
<PAGE> 

Potential Acquisitions 

   As part of its ongoing business, the Company actively seeks opportunities 
to acquire additional properties on favorable terms. The purchase of any of 
these potential acquisitions is subject to satisfaction of numerous 
conditions, including, without limitation, the completion of due diligence 
and, with respect to the Rosemont, Illinois office complexes, the negotiation 
and execution of definitive purchase agreements. Additionally, the purchase 
of the Rosemont, Illinois office complexes are subject to rights of certain 
tenants to purchase portions of each of the two complexes. No assurances can 
be given that the Company will acquire any of the property opportunities 
currently under review. 

   Rosemont, Illinois Office Complexes. In March 1997, the Company entered 
into a letter of intent to acquire two office complexes located in Rosemont, 
Illinois (suburban Chicago) comprising an aggregate of approximately 1.3 
million square feet and which include approximately 2.9 acres of land 
suitable for the development of approximately 250,000 square feet of 
additional office space. This acquisition is subject, among other things, to 
the rights of certain tenants to purchase portions of each of the two 
complexes. See "Properties and Pending Acquisitions" for a description of the 
O'Hare submarket of the Suburban Chicago Office Market. 

   175 Wyman Street. In March 1997, the Company entered into a contract to 
acquire 26.7 acres of land suitable for development and a vacant 335,000 
square foot office/research and development complex located at 175 Wyman 
Street in Waltham (suburban Boston), Massachusetts for approximately $24.0 
million. The Company plans to redevelop the property into 400,000 square feet 
of Class A office space. The Company expects that such development could 
begin in late 1997 or early 1998. 175 Wyman Street is located in the Route 
128/Mass. Pike submarket. For a description of the Greater Boston Suburban 
Office Market, see "Properties and Pending Acquisitions." 

Other Developments 

   Credit Facility. Bank of Boston has committed to convert the Company's 
$300 million secured Credit Facility to an unsecured facility. Additionally, 
Bank of Boston has committed to reduce the interest rate on the Credit 
Facility. 

   
   Sale of Westlakes Office Park. The Company is negotiating to sell the
Westlakes Office Park, the Company's sole Property in the Suburban Philadelphia
Office Market. The consummation of this sale is subject to customary closing
conditions, including, but not limited to, purchaser's satisfactory completion
of its due diligence. At the Company's option, the transaction may be structured
as a like-kind exchange.
    

   Crosby Corporate Center. In December 1996, the Company acquired a 29-acre 
parcel of land adjacent to the Crosby Corporate Center. This parcel has 
approximately 250,000 square feet of building capacity, and the Company 
expects that development of a significant portion of the land could commence 
in the second quarter of 1997, although no assurances can be made in this 
regard. The Company believes that demand for office space in the Northwest 
submarket of the Greater Boston Suburban Office Market (the location of the 
Crosby Corporate Center) will continue as several major tenants at the 
Property experience substantial growth. No assurances can be made that such 
increased demand will occur. For a description of the Greater Boston Suburban 
Office Market, see "Properties and Pending Acquisitions." 

   Sale of Beacon Construction Company. In December 1996, the Construction 
Company sold substantially all of its assets. The Construction Company's new 
business plan involves the completion of certain contracts not transferred to 
the purchaser and the liquidation of its remaining assets. The Company's 
decision to effect the sale of the Construction Company was based upon the 
determination that the third-party construction business was no longer an 
integral part of the Company's business. 


                                     S-27 
<PAGE> 

                     PROPERTIES AND PENDING ACQUISITIONS 

   The Company owns a portfolio of Class A office properties and other 
commercial properties located in major metropolitan areas, including Boston, 
Atlanta, Chicago, Los Angeles, San Francisco and Washington, D.C. The 
Properties encompass approximately 15.8 million rentable square feet. Class A 
office properties generally are considered to have excellent locations and 
access, attract high quality tenants, be well maintained and professionally 
managed and achieve among the highest rent, occupancy and tenant retention 
rates within their markets. 

The Downtown Boston Office Market 

Market Information 

   According to Spaulding & Slye, as of December 31, 1996, there were 
approximately 47.4 million square feet of private sector office space in the 
Downtown Boston Office Market. The following table sets forth the vacancy 
rates for the Downtown Boston Office Market from 1992 through 1996. 

<TABLE>
<CAPTION>
 Period     Vacancy Rate 
- ---------  --------------- 
<S>             <C>
1992            15.9% 
1993            16.3% 
1994            12.1% 
1995            11.5% 
1996             5.2%(a) 
</TABLE>

(a) For periods prior to 1996, Spaulding & Slye calculated vacancy rate (or 
    available space) as space actively marketed for immediate or future 
    occupancy, including space available for sublet. For periods beginning in 
    1996, Spaulding & Slye also calculates vacancy rate as space available 
    for immediate occupancy. Under the original definition, the vacancy rate 
    (or available space) in 1996 would have been 7.6%. 

Source: Spaulding & Slye Office Market Reports 1992 through January 1997. 

   Spaulding & Slye reports that Net Absorption in 1996 was 1.6 million 
square feet and 400,000 square feet in 1995. This significant amount of Net 
Absorption is largely due to growth in the financial services, publishing and 
legal sections, together with the relocation of certain federal government 
groups. 

Property Descriptions 
The following chart describes each of the Company's Properties located in the 
Downtown Boston Office Market. 

<TABLE>
<CAPTION>
                                    Year Built/   Rentable Area    No. of    Company's % 
Property                             Renovated   in Square Feet   Stories     Ownership       Parking 
 --------------------------------- ------------- ---------------  --------- -------------  --------------- 
<S>                                  <C>            <C>              <C>         <C>      <C>
75-101 Federal Street                1985-1988        812,000        (a)          (b)     (c) 
One Post Office Square                    1981        764,129        41           50%(d)  375-car garage 
Center Plaza                         1966-1969        649,359         9           (e)     575-car garage 
150 Federal Street                        1988        530,279        28          100%     285-car garage 
Rowes Wharf                               1987        344,326        15           (f)     550-car garage 
Russia Wharf                         1978-1982        314,596        (g)         100%     146 spaces 
2 Oliver Street-147 Milk Street      1982-1988        271,000        (h)         100%     None 
175 Federal Street                        1977        203,349        17          100%     None 
South Station                             1988        148,591         5           (i)     (j) 
                                                 --------------- 
    Total                                           4,037,629 
                                                 =============== 
</TABLE>

(a) 75 Federal Street is a 21-story building and 101 Federal Street is a 
    31-story building. 

(b) The Company holds approximately 51.6% of the common stock of BeaMetFed, 
    Inc., a private REIT that holds the fee title to 75-101 Federal Street. 

(c) 101 Federal Street has a 195-car garage. 

(d) One Post Office Square is owned by a joint venture between Equitable and 
    the Company. The Company has a 50% interest in and is the managing 
    venturer of this joint venture. 

(e) The Company holds a 1% general partner interest, a 75% limited partner 
    interest and an option to purchase the remaining 24% limited partner 
    interest in the partnership that owns the Center Plaza Property. 

                                     S-28 

<PAGE> 

(f) The Company holds a 90% limited partner interest in Rowes Wharf Limited 
    Partnership ("RWLP"). RWLP and Equitable each hold a 50% general partner 
    interest in Rowes Wharf Associates ("RWA"), the partnership that owns the 
    hotel space and leases the office and retail space at the Rowes Wharf 
    Property. Through its interest in RWLP, the Company owns a 45% indirect 
    limited partner interest in RWA. The general partner of RWLP, has the 
    authority to mortgage or sell all of RWLP's interest in Rowes Wharf 
    without the Company's consent. 

(g) Russia Wharf is a complex of three seven-story buildings. 

(h) 2 Oliver Street is an 11-story building and 147 Milk Street is a 10-story 
    building. 

(i) The Company owns 100% of a ground leasehold in this Property. 

(j) A 600-car garage is under construction by the Massachusetts Bay 
Transportation Authority. 

Base Rents and Net Effective Rents 
The following charts set forth the average annual Base Rent (as defined 
below) and the average annual Net Effective Rent (as defined below) per 
square foot for each of the Company's Properties in the Downtown Boston 
Office Market. Base Rent is gross rent excluding payments by tenants on 
account of real estate tax and operating expense escalation. Net Effective 
Rent is Base Rent adjusted on a straight-line basis for contractual rent 
step-ups and free rent periods, plus tenant payments on account of real 
estate tax and operating expense escalation, less total operating expenses 
and real estate taxes. 

                                         Average Annual Base Rents 
                           -----------------------------------------------------
                                                                    As of 12/31 
Property                      1992     1993      1994      1995         1996 
- --------------------------  --------  --------  -------- ---------  ------------
                                             (per square foot) 
175 Federal Street           $14.81   $17.79    $21.15    $23.82       $25.11 
One Post Office Square        22.41    21.85     22.99     23.55        24.04 
South Station                 28.51    28.51     27.24     28.26        30.42 
Center Plaza                  19.65    21.40     22.98     22.95        22.41 
Rowes Wharf                   30.87    30.04     30.39     30.87        30.49 
150 Federal Street            21.20    23.88     24.25     24.67        25.12 
Russia Wharf(a)               --       --        --        12.53        14.01 
75-101 Federal Street(a)      --       --        --        28.00        30.34 
2 Oliver Street(a)            --       --        --        16.46        16.89 
                            --------  --------  -------- ---------  ------------
    Weighted Average         $22.38   $23.30    $24.34    $ 23.75      $24.78 
                            ========  ========  ======== =========  ============


(a) Russia Wharf, 75-101 Federal Street and 2 Oliver Street were acquired by 
    the Company subsequent to its initial public offering in May 1994 (the 
    "Initial Public Offering") and, consequently, information prior to the 
    date of acquisition is unavailable. 


                                    Average Annual Net Effective Rents 
                           ---------------------------------------------------- 
                                                                   As of 12/31 
Property                      1992     1993      1994      1995        1996 
- --------------------------  --------  --------  -------- --------  -------------
                                             (per square foot) 
175 Federal Street           $12.40   $13.03    $13.97    $15.40      $16.49 
One Post Office Square        14.47    14.32     15.01     15.03       14.88 
South Station                 14.56    15.87     18.16     20.05       20.59 
Center Plaza                   5.61     9.79     13.27     13.18       12.31 
Rowes Wharf                   14.26    15.45     17.65     18.22       17.77 
150 Federal Street            17.51    19.99     20.95     21.14       21.26 
Russia Wharf(a)               --       --        --         7.86        7.92 
75-101 Federal Street(a)      --       --        --        19.10       20.12 
2 Oliver Street(a)            --       --        --        11.53       11.70 
                            --------  --------  -------- --------  -------------
    Weighted Average         $13.16   $14.77    $16.22    $15.78      $16.15 
                            ========  ========  ======== ========  =============


(a) Russia Wharf, 75-101 Federal Street and 2 Oliver Street were acquired by 
    the Company subsequent to its Initial Public Offering and, consequently, 
    information prior to the date of acquisition is unavailable. 


                                     S-29 
<PAGE> 

Occupancy Rates 

   The following chart sets forth the occupancy rate, expressed as a 
percentage, for each of the Company's Properties in the Downtown Boston 
Office Market. 

<TABLE>
<CAPTION>
                                                    Occupancy Rate 
                                ------------------------------------------------------ 
                                                                         As of 12/31 
Property                          1992      1993     1994      1995         1996 
 ------------------------------  -------- --------  --------  -------- --------------- 
<S>                               <C>       <C>       <C>       <C>          <C>
175 Federal Street                100%      100%       94%       84%          94% 
One Post Office Square             93%       95%       97%       99%          99% 
South Station                      96%       98%      100%      100%         100% 
Center Plaza                       73%       76%       84%       91%          93% 
Rowes Wharf                        91%       92%       96%       98%         100% 
150 Federal Street                 98%       99%       98%       99%          99% 
Russia Wharf(a)                    --        --        --        94%          98% 
75-101 Federal Street(a)           --        --        --        93%          92% 
2 Oliver Street(a)                 --        --        --        93%          97% 
                                 -------- --------  --------  -------- --------------- 
    Weighted Average               90%       91%       94%       95%          96% 
                                 ======== ========  ========  ======== =============== 
</TABLE>

(a) Russia Wharf, 75-101 Federal Street and 2 Oliver Street were acquired by 
    the Company subsequent to the Initial Public Offering and, consequently, 
    information prior to the date of acquisition is unavailable. 

Lease Expirations 

   The following table sets forth lease expirations (in square feet) for the 
Company's Properties in the Downtown Boston Office Market. See "Lease 
Expirations--All Properties" for a detailed description of lease expirations 
at each of the Company's Properties. 

<TABLE>
<CAPTION>
                      1997         1998         1999         2000         2001 
                  ------------ ------------------------ ------------  ------------ 
<S>                  <C>         <C>          <C>          <C>          <C>
square feet (a)        403,735      408,357      443,870      408,509      723,343 
% sq. ft. (b)            10.0%        10.1%        11.0%        10.1%        17.9% 
annual rent (c)      9,668,253   12,361,782   12,045,829   10,236,753   22,730,854 
psf (d)                 $23.95       $30.27       $27.14       $25.06       $31.42 
tenants (e)                 71           64           65           66           43 
</TABLE>
<TABLE>
<CAPTION>
                                                            2005 & 
                      2002         2003         2004        beyond 
                  ------------ ------------------------  ------------ 
<S>                <C>          <C>          <C>          <C>
square feet (a)       513,007     171,941      134,147       685,647 
% sq. ft. (b)           12.7%        4.3%         3.3%         17.0% 
annual rent (c)    16,523,017   4,925,273    4,064,996    22,729,697 
psf (d)                $32.21      $28.65       $30.30        $33.15 
tenants (e)                21           8           11            18 
</TABLE>

(a) Total area in square feet covered by such leases 

(b) Percentage of total square feet represented by such leases 


(c) Annualized expiring base rental income represented by such leases in the 
    year of expiration plus 1996 tenant payments on account of real estate 
    tax and operating expense escalations, except leases with CPI increases 
    in lieu of expense recoveries 


(d) Calculated as annual rent divided by square feet 

(e) The number of tenants whose leases will expire 

The Greater Boston Suburban Office Market 

Market Information 

   As of December 1996, there were approximately 46.1 million square feet of 
private sector office space in the Greater Boston Suburban Office Market. Of 
the 19 Properties located in the Greater Boston Suburban Office Market, eight 
are located in the Route 128/Mass. Pike submarket, one (Westwood Business 
Centre) is located in the South submarket and 10 (Crosby Corporate Center and 
New England Executive Park Portfolio) are located in the Northwest submarket. 
The following tables set forth the vacancy rates for the Route 128/Mass. 
Pike, South, and Northwest submarkets from December 1992 through December 
1996. 

                                     S-30 

<PAGE> 

<TABLE>
<CAPTION>
       Route 128/ 
  Mass. Pike Submarket        South Submarket         Northwest Submarket 
- ------------------------ ------------------------- ------------------------- 
  Date     Vacancy Rate     Date    Vacancy Rate     Date     Vacancy Rate 
- -------- ---------------  -------- ---------------  --------  --------------- 
<S>            <C>       <C>            <C>        <C>            <C>
12/92          18.5%     12/92          13.5%      12/92          21.7% 
12/93          11.6%     12/93          12.3%      12/93          18.0% 
12/94          10.6%     12/94           9.4%      12/94          16.2% 
12/95           9.6%     12/95           9.2%      12/95          13.7% 
12/96           2.6%(a)  12/96           5.1%(a)   12/96           6.2%(a) 
</TABLE>

(a) For periods prior to 1996, Spaulding & Slye calculated vacancy rate (or 
    available space) as space actively marketed for immediate or future 
    occupancy, including space available for sublet. For periods beginning in 
    1996, Spaulding & Slye also calculates vacancy rate as space available 
    for immediate occupancy. Under the original definition, the vacancy rate 
    (or available space) in 1996 in the Route 128/Mass. Pike, South and 
    Northwest submarkets would have been 4.7%, 9.1% and 16.5%, respectively. 

Source: Spaulding & Slye Office Market Reports 1992 through January 1997. 

   Spaulding & Slye reports that Net Absorption for the Route 128/Mass. Pike 
submarket was 531,000 square feet in 1996 and 100,000 square feet in 1995. 
For the South submarket, Spaulding & Slye reports that Net Absorption was 
39,000 square feet in 1996 and 100,000 square feet in 1995. In the Northwest 
submarket, Spaulding & Slye reports Net Absorption was (309,000) square feet 
in 1996 and 300,000 square feet in 1995. 

Property Descriptions 

   The following chart describes the Company's Properties located in the 
Greater Boston Suburban Office Market. The Company owns a 100% fee interest 
in each Property located in the Greater Boston Suburban Office Market, 
subject to an option to purchase Building Seventeen of the New England 
Executive Park Portfolio by the tenant of the Property. 

<TABLE>
<CAPTION>
                                          Year Built/   Rentable Area    No. of 
Property                                   Renovated    in Square Feet   Stories 
- ---------------------------------------- ------------- --------------- ---------- 
<S>                                           <C>           <C>            <C>
Wellesley Office Park: 
 65 William Street, Building One              1963           29,502         3 
 60 William Street, Building Two              1966           49,826         4 
 55 William Street, Building Three            1968           52,636         4 
 40 William Street, Building Four             1970           71,904         4 
 20 William Street, Building Five             1973          129,000         4 
 45 William Street, Building Six              1976          155,718         4 
 80 William Street, Building Seven            1984           71,324         4 
 100 William Street, Building Eight           1996           62,952         3 
Crosby Corporate Center                       1996          336,000        (a) 
Westwood Business Centre                      1985          160,400         3 
New England Executive Park Portfolio: 
 Building One                                 1979           79,942         3 
 Building Two                                 1970           64,569         2 
 Building Six                                 1980          101,641         4 
 Building Eight                               1982          218,761         6 
 Building Twelve                              1970           94,860         4 
 Building Fifteen                             1976           43,267         2 
 Building Sixteen                             1978           59,541         3 
 Building Seventeen                           1979           56,503         3 
 Building Twenty-Four                         1985           97,929         4 
                                                       --------------- 
    Total Properties                                      1,936,275 
                                                       =============== 
</TABLE>


(a) Crosby Corporate Center is a Property which consists of six one- and 
    two-story buildings. 



                                     S-31 

<PAGE> 

Base Rents and Net Effective Rents 

   The following charts set forth the average annual Base Rents and the 
average annual Net Effective Rents per square foot for each of the Company's 
Properties located in the Greater Boston Suburban Office Market. 

<TABLE>
<CAPTION>
                                                           Average Annual Base Rents 
                                           ------------------------------------------------------- 
                                                                                       As of 12/31 
Property                                      1992       1993      1994       1995        1996 
 ------------------------------------------ ---------  -------- -----------  -------- ------------- 
<S>                                          <C>        <C>       <C>        <C>         <C>
Wellesley Office Park: 
 65 William Street, Building One             $21.45     $20.97    $22.00     $22.60      $23.77 
 60 William Street, Building Two              22.04      16.62     19.26      19.39       20.98 
 55 William Street, Building Three            25.41      23.25     22.06      22.03       22.74 
 40 William Street, Building Four             23.33      22.89     22.28      23.08       24.37 
 20 William Street, Building Five             22.52      21.20     21.90      22.96       24.26 
 45 William Street, Building Six              15.65      15.46     16.52      16.28       22.80 
 80 William Street, Building Seven            37.71      37.34     25.00(a)   25.00       25.00 
 100 William Street, Building Eight(b)        --         --        --         23.00       28.50 
Westwood Business Centre(b)                   --         --        --         18.46       19.51 
                                            ---------  -------- -----------  -------- ------------- 
    Subtotal                                  22.96      21.63     21.03      20.50       23.08 
                                            ---------  -------- -----------  -------- ------------- 
Crosby Corporate Center(b)                    --         --        --         --          12.97 
New England Executive Park Portfolio(b)       --         --        --         --          18.48 
                                            ---------  -------- -----------  -------- ------------- 
    Total Weighted Average                   $22.96     $21.63    $21.03     $20.50      $19.41 
                                            =========  ======== ===========  ======== ============= 
</TABLE>

(a) This reduction in Base Rent is attributable to the execution of a new 
    lease with the tenant occupying this Property for an 11-year term 
    commencing January 1, 1994. 


(b) The 100 William Street Property, Westwood Business Centre and the New 
    England Executive Park Portfolio were acquired by the Company subsequent 
    to the Initial Public Offering and, consequently, information prior to 
    the date of acquisition is unavailable. The Crosby Corporate Center was 
    redeveloped by the Company from research/development space to Class A 
    office space and, consequently, historical information prior to such 
    redevelopment is not comparable. 


<TABLE>
<CAPTION>
                                                      Average Annual Net Effective Rents 
                                           ------------------------------------------------------- 
                                                                                       As of 12/31 
Property                                      1992       1993      1994       1995        1996 
 ------------------------------------------ ---------  -------- -----------  -------- ------------- 
<S>                                          <C>        <C>       <C>        <C>         <C>
Wellesley Office Park: 
 65 William Street, Building One             $12.40     $12.70    $13.19     $14.02      $16.15 
 60 William Street, Building Two              13.30       9.36     11.26      11.58       15.14 
 55 William Street, Building Three            16.36      14.86     13.86      13.92       14.89 
 40 William Street, Building Four             13.18      16.17     14.07      14.77       16.52 
 20 William Street, Building Five             12.38      11.92     13.04      14.11       15.61 
 45 William Street, Building Six               9.06       9.07     10.84      12.65       16.04 
 80 William Street, Building Seven            31.10      31.35     21.38(a)   19.47       20.38 
 100 William Street, Building Eight(b)        --         --        --         15.50       20.50 
Westwood Business Centre(b)                   --         --        --         11.41       11.38 
                                            ---------  -------- -----------  -------- ------------- 
    Subtotal                                  14.55      14.23     13.57      13.66       15.68 
                                            ---------  -------- -----------  -------- ------------- 
Crosby Corporate Center (b)                   --         --        --         --           9.57 
New England Executive Park Portfolio(b)       --         --        --         --          11.62 
                                            ---------  -------- -----------  -------- ------------- 
    Total Weighted Average                   $14.55     $14.23    $13.57     $13.66      $12.92 
                                            =========  ======== ===========  ======== ============= 
</TABLE>

(a) This reduction in Net Effective Rent is attributable to the execution of 
    a new lease with the tenant occupying this Property for an 11-year term 
    commencing January 1, 1994. 


(b) The 100 William Street Property, Westwood Business Centre and the New 
    England Executive Park Portfolio were acquired by the Company subsequent 
    to the Initial Public Offering and, consequently, information prior to 
    the date of acquisition is unavailable. The Crosby Corporate Center was 
    redeveloped by the Company from 



                                     S-32 

<PAGE> 

    research/development space to Class A office space and, consequently, 
    historical information prior to such redevelopment is not comparable. 

Occupancy Rates 

   The following chart sets forth the occupancy rate, expressed as a 
percentage, for each of the Company's Properties located in the Greater 
Boston Suburban Office Market. 

<TABLE>
<CAPTION>
                                                                    Occupancy Rate 
                                                ------------------------------------------------------ 
                                                                                         As of 12/31 
Property                                          1992      1993     1994      1995         1996 
 ----------------------------------------------  -------- --------  --------  -------- --------------- 
<S>                                                <C>      <C>       <C>       <C>          <C>
Wellesley Office Park: 
 65 William Street, Building One                   100%     100%       94%      100%         100% 
 60 William Street, Building Two                    96%     100%      100%       98%         100% 
 55 William Street, Building Three                  91%      96%      100%      100%         100% 
 40 William Street, Building Four                   97%     100%      100%       93%          99% 
 20 William Street, Building Five                   95%      97%       97%       97%         100% 
 45 William Street, Building Six                    91%      90%       99%       98%         100% 
 80 William Street, Building Seven                 100%     100%      100%      100%         100% 
 100 William Street, Building Eight(a)              --       --        --       100%         100% 
Westwood Business Centre(a)                         --       --        --        99%         100% 
    Subtotal                                        95%      97%       99%       98%         100% 
                                                 -------- --------  --------  -------- --------------- 
Crosby Corporate Center(a)                          --       --        --        --           88% 
New England Executive Park Portfolio(a)             --       --        --        --           98% 
                                                 -------- --------  --------  -------- --------------- 
    Total Weighted Average                          95%      97%       99%       98%          97% 
                                                 ======== ========  ========  ======== =============== 
</TABLE>


(a) The 100 William Street Property, Westwood Business Centre and the New 
    England Executive Park Portfolio were acquired by the Company subsequent 
    to the Initial Public Offering and, consequently, information prior to 
    the date of acquisition is unavailable. The Crosby Corporate Center was 
    redeveloped by the Company from research/development space to Class A 
    office space and, consequently, historical information prior to such 
    development is not comparable. 


Lease Expirations 

   The following table sets forth lease expirations (in square feet) for the 
Company's Properties in the Greater Boston Suburban Office Market. See "Lease 
Expirations--All Properties" for a detailed description of lease expirations 
at each of the Company's Properties. 

<TABLE>
<CAPTION>
                      1997         1998         1999         2000         2001 
                  ------------ ------------------------ ------------ ------------ 
<S>                  <C>          <C>         <C>           <C>          <C>
square feet (a)        407,248      204,784      187,821      190,127      177,738 
% sq. ft. (b)            20.9%        10.5%         9.6%         9.8%         9.1% 
annual rent (c)      8,125,838    4,268,136    3,482,584    4,194,448    4,126,630 
psf (d)                 $19.95       $20.84       $18.54       $22.06       $23.22 
tenants (e)                 51           38           28           30           32 
</TABLE>
<TABLE>
<CAPTION>
                                                            2005 & 
                      2002         2003         2004        beyond 
                  ------------ ------------------------  ------------ 
<S>                <C>          <C>          <C>          <C>
square feet (a)       77,740       44,457       97,400       497,760 
% sq. ft. (b)           4.0%         2.3%         5.0%         25.6% 
annual rent (c)    2,099,918    1,064,518    2,093,856    11,093,598 
psf (d)               $27.01       $23.94       $21.50        $22.29 
tenants (e)               12            3            4             8 
</TABLE>

(a) Total area in square feet covered by such leases 

(b) Percentage of total square feet represented by such leases 

(c) Annualized expiring base rental income represented by such leases in the 
    year of expiration plus 1996 tenant payments on account of real estate 
    tax and operating expense escalations, except leases with CPI increases 
    in lieu of expense recoveries. 

(d) Calculated as annual rent divided by square feet 

(e) The number of tenants whose leases will expire 

                                     S-33 

<PAGE> 


The Cambridge Office Market 
As of December 1996, there were approximately 9.8 million square feet of 
office space in the Cambridge Office Market. The entire Cambridge Office 
Market had a vacancy rate of 1.8% as of December 1996. Spaulding & Slye 
reports Net Absorption in the Cambridge Office Market of approximately 
180,000 square feet in 1996 and 210,000 square feet in 1995. 


   The following chart describes each of the Company's Properties located in 
the Cambridge Office Market. 

<TABLE>
<CAPTION>
                       Year Built/   Rentable Area    No. of    Company's 
Property                Renovated    in Square Feet  Stories    Ownership 
- --------------------- ------------- ---------------  ---------  ------------ 
<S>                       <C>           <C>             <C>        <C>
One Canal Park            1987          100,300          4         100% 
Ten Canal Park            1987          110,000          6         100% 
245 First Street(a) 
 Riverview I              1986          109,000          6         100% 
 Riverview II             1985          148,000         18         100% 
</TABLE>

(a) Riverview I and Riverview II are connected by a four-story atrium 
    comprising approximately 6,000 square feet. 


   The following chart sets forth the annual Base Rent per square foot, the 
annual Net Effective Rent per square foot, and the occupancy rate for each of 
the Company's Properties located in the Cambridge Office Market as of 
December 31, 1996. 


<TABLE>
<CAPTION>
 Property                Base Rent   Net Effective Rent  Occupancy Rate 
- ---------------------- ------------  ------------------- --------------- 
<S>                       <C>              <C>                 <C>
One Canal Park            $22.05           $13.99              100% 
Ten Canal Park             19.23            12.42               92% 
245 First Street           21.58            17.46              100% 
                       ------------  ------------------- --------------- 
    Weighted Average      $21.13           $15.55               98% 
                       ============  =================== =============== 
</TABLE>

   The following table sets forth lease expirations (in square feet) for the 
Company's Properties in the Cambridge Office Market. See "Lease 
Expirations--All Properties" for a detailed description of lease expirations 
at each of the Company's Properties. 
<TABLE>
<CAPTION>
                                                                                                         2005 & 
                   1997      1998      1999      2000       2001         2002        2003      2004      beyond 
                   ------- ---------  --------  -------------------- ------------  ---------  ----------------- 
<S>                 <C>      <C>        <C>       <C>      <C>          <C>          <C>        <C>        <C>
square feet (a)         0      3,499     1,411     6,320     315,964      107,667     28,000        0         0 
% sq. ft. (b)        0.0%       0.7%      0.3%      1.3%       66.6%        22.7%       5.9%     0.0%      0.0% 
annual rent (c)         0    127,832    31,606    83,269   8,165,274    2,480,979    709,712        0         0 
psf (d)             $0.00     $36.53    $22.40    $13.18      $25.84       $23.04     $25.35    $0.00      $0.0 
tenants (e)             0          1         1         1           4            2          1        0         0 
</TABLE>

(a) Total area in square feet covered by such leases 

(b) Percentage of total square feet represented by such leases 


(c) Annualized expiring base rental income represented by such leases in the 
    year of expiration plus 1996 tenant payments on account of real estate 
    tax and operating expense escalations, except leases with CPI increases 
    in lieu of expense recoveries 


(d) Calculated as annual rent divided by square feet 

(e) The number of tenants whose leases will expire 

                                     S-34 

<PAGE> 

The Central Perimeter Atlanta Office Market 

Market Information 

   According to Jamison Research, Inc., as of December 1996 there were 
approximately 91.0 million square feet of office space in the Atlanta Office 
Market. The Central Perimeter submarket, the location of the Perimeter Center 
Portfolio, had approximately 18.7 million square feet of office space. The 
following table sets forth the vacancy rates and Net Absorption for the 
Central Perimeter Atlanta Office Market from 1992 through 1996. 

          Vacancy Rate         Net Absorption 
        ---------------  ---------------------------- 
                        (in millions of square feet) 
1992          16.8%                   .5 
1993          11.7%                  1.0 
1994           8.7%                   .6 
1995           6.0%                   .7 
1996           3.8%                   .5 

Sources: CB/Torto Wheaton 1992 through 1994; Jamison Research 1995 and 1996 

Property Descriptions 
The following is a description of the buildings located in the Perimeter 
Center Portfolio. The Company owns a 100% fee interest in each of the 
Properties in the Perimeter Center Portfolio. 

                                        Year Built/   Rentable Area 
Property                                 Renovated    in Square Feet 
- -------------------------------------- -------------  --------------- 
North Terraces                              1984          492,845 
South Terraces                              1986          494,513 
8,10,12,14,16 Perimeter Center East         1970           64,998 
20,22,24,26 Perimeter Center East           1973           69,727 
28,30,32 Perimeter Center East              1974          104,816 
41 Perimeter Center East                    1974           92,021 
47 Perimeter Center East                    1974           92,021 
50 Perimeter Center East                    1981            6,300 
53 Perimeter Center East                    1972           90,505 
56 Perimeter Center East                    1977           93,625 
64 Perimeter Center East                    1971          183,037 
64A Perimeter Center East                   1985          372,498 
70,72,74,76 Perimeter Center East           1972           61,932 
125 Perimeter Center West                   1972          223,059 
219 Perimeter Center Parkway                1979          127,697 
223 Perimeter Center Parkway                1978          127,823 
245 Perimeter Center Parkway                1981          229,217 
301 Perimeter Center North                  1982          151,416 
303 Perimeter Center North                  1989          162,256 
Park Place Shopping Center                  1979           61,830 
                                                      --------------- 
    Total                                               3,302,136 
                                                      =============== 

                                     S-35 

<PAGE> 

Base Rents and Historic Net Rents 

   The following charts show the average annual Base Rent and the average 
annual Historic Net Rent (as defined below) per square foot for each of the 
Properties in the Perimeter Center Portfolio. Historic Net Rent is Base Rent 
plus tenant payments on account of real estate tax and operating expense 
escalation, less total operating expenses and real estate taxes. 

<TABLE>
<CAPTION>
                                                    Average Annual Base Rents 
                                       -------------------------------------------------- 
                                                                                 As of 
Property                                  1992     1993      1994      1995    12/31/96 
- --------------------------------------  --------  -------- --------  -------- ----------- 
                                                        (per square foot) 
<S>                                      <C>      <C>       <C>       <C>       <C>
North Terraces                           $15.55   $17.94    $17.87    $18.06    $20.43 
South Terraces                            18.78    17.08     18.59     20.70     20.11 
8,10,12,14,16 Perimeter Center East       14.32    13.51     13.91     11.63     14.33 
20,22,24,26 Perimeter Center East         13.48    12.92     11.75     13.11     14.78 
28,30,32 Perimeter Center East            13.01    10.34     10.42     12.52     13.38 
41 Perimeter Center East                  14.45    14.76     14.29     13.70     15.11 
47 Perimeter Center East                  16.13    15.84     14.94     15.39     15.16 
50 Perimeter Center East                   6.00     6.19      6.27      6.37      6.62 
53 Perimeter Center East                  13.44    13.57     13.62     15.02     15.62 
56 Perimeter Center East                  11.76    11.27     11.23     11.77     15.30 
64 Perimeter Center East                   5.34     5.34      5.34      5.34      5.34 
64A Perimeter Center East                 19.01    19.31     19.62     19.91     20.36 
70,72,74,76 Perimeter Center East         13.74    13.90     14.76     16.02     15.88 
125 Perimeter Center West                  4.10     4.10      4.10      4.11      4.10 
219 Perimeter Center Parkway              11.79    14.89     16.88     15.62     16.06 
223 Perimeter Center Parkway               6.76     8.08      8.62     11.33     16.50 
245 Perimeter Center Parkway              15.80    15.99     16.17     16.36     17.89 
301 Perimeter Center North                17.17    17.17     17.73     17.80     18.47 
303 Perimeter Center North                21.06    19.70     20.44     21.06     20.76 
Park Place Shopping Ctr                   18.86    19.78     19.32     25.53     16.28 
                                        --------  -------- --------  -------- ----------- 
    Weighted Average                     $14.57   $14.81    $15.18    $15.89    $16.64 
                                        ========  ======== ========  ======== =========== 
</TABLE>

<TABLE>
<CAPTION>
                                                Average Annual Historic Net Rents 
                                       -------------------------------------------------- 
                                                                             As of 12/31 
Property                               1992(a)   1993(a)  1994(a)  1995(a)     1996(b) 
- --------------------------------------  -------  -------- --------  -------  ------------- 
                                                        (per square foot) 
<S>                                     <C>      <C>       <C>      <C>        <C>
North Terraces                          $ 8.67   $10.70    $10.52   $ 9.38     $14.08 
South Terraces                           12.28     9.17     11.40    12.83      13.40 
8,10,12,14,16 Perimeter Center East       7.17     6.09      5.03     4.47       9.15 
20,22,24,26 Perimeter Center East         6.86     6.12      5.15     4.72       9.29 
28,30,32 Perimeter Center East            6.78     2.63      4.31     5.66       8.59 
41 Perimeter Center East                  7.63     6.55      6.16     5.59       9.74 
47 Perimeter Center East                  8.85     9.09      7.61     7.28       9.82 
50 Perimeter Center East                  6.00     6.19      6.27     6.37       6.62 
53 Perimeter Center East                  7.07     7.88      7.45     8.26      11.00 
56 Perimeter Center East                  8.03     7.16      7.57     6.65       8.24 
64 Perimeter Center East                  3.33     3.29      3.24     3.20       2.38 
64A Perimeter Center East                15.75    15.59     15.80    15.09      17.39 
70,72,74,76 Perimeter Center East         6.95     7.13      7.48     8.05      10.63 
125 Perimeter Center West                 3.56     3.33      3.31     3.04       3.07 
219 Perimeter Center Parkway              5.79     7.68     10.32     8.91      11.13 
223 Perimeter Center Parkway              0.73     1.63      1.92     3.71      11.43 
245 Perimeter Center Parkway              8.83     8.48      8.21     8.45      11.36 
301 Perimeter Center North               11.09     9.91     10.58     9.85      12.25 
303 Perimeter Center North               15.45    13.32     13.55    13.33      14.70 
Park Place Shopping Ctr                  12.29    13.38     12.60    16.50      12.96 
                                        -------  -------- --------  -------  ------------- 
    Weighted Average                    $ 9.26   $ 8.92    $ 9.28   $ 9.28     $11.54 
                                        =======  ======== ========  =======  ============= 
</TABLE>

(a) Calculated as Historic Net Rent 

(b) Calculated as Net Effective Rent 

                                     S-36 

<PAGE> 

Occupancy Rates 

   The following chart sets forth the occupancy rate, expressed as a 
percentage, for each of the Properties located in the Perimeter Center 
Portfolio. 

<TABLE>
<CAPTION>
                                                                 Occupancy Rates 
                                            --------------------------------------------------------- 
Property                                      1992     1993      1994      1995      As of 12/31/96 
 ------------------------------------------ --------  --------  -------- --------  ------------------ 
<S>                                           <C>       <C>       <C>      <C>            <C>
North Terraces                                 92%       96%       96%      84%            96% 
South Terraces                                 84%       88%       92%      96%           100% 
8,10,12,14,16 Perimeter Center East            69%       61%       60%      69%            90% 
20,22,24,26 Perimeter Center East              87%       91%       85%      78%            94% 
28,30,32 Perimeter Center East                 65%       61%       83%      85%            96% 
41 Perimeter Center East                       78%       58%       61%      71%           100% 
47 Perimeter Center East                       75%       79%       87%      77%            91% 
50 Perimeter Center East                      100%      100%      100%     100%           100% 
53 Perimeter Center East                       70%       88%       88%      83%            90% 
56 Perimeter Center East                      100%       93%       93%      93%            84% 
64 Perimeter Center East                      100%      100%      100%     100%           100% 
64A Perimeter Center East                     100%      100%      100%     100%           100% 
70,72,74,76 Perimeter Center East              89%       91%       89%      86%            96% 
125 Perimeter Center West                     100%      100%      100%     100%           100% 
219 Perimeter Center Parkway                   82%       64%       85%      99%           100% 
223 Perimeter Center Parkway                  100%      100%      100%     100%           100% 
245 Perimeter Center Parkway                  100%      100%      100%     100%           100% 
301 Perimeter Center North                    100%      100%      100%     100%           100% 
303 Perimeter Center North                     99%      100%      100%     100%           100% 
Park Place Shopping Center                     98%      100%       98%      91%           100% 
                                            --------  --------  -------- --------  ------------------ 
    Weighted Average                           91%       92%       94%      93%            98% 
                                            ========  ========  ======== ========  ================== 
</TABLE>

Lease Expirations 

   The following table sets forth lease expirations (in square feet) for the 
Company's Properties in the Perimeter Center Portfolio. This table does not 
contain information relating to certain ground leases in the Perimeter Center 
Portfolio. See "Lease Expirations--All Properties" for a detailed description 
of lease expirations at each of the Company's Properties. 

<TABLE>
<CAPTION>
                      1997         1998         1999         2000         2001 
                  ------------ ------------------------ ------------ ------------ 
<S>                  <C>          <C>         <C>           <C>         <C>
square feet (a)        302,600      344,306      680,607      339,519      804,125 
% sq. ft. (b)             9.2%        10.4%        20.6%        10.3%        24.3% 
annual rent (c)      6,023,929    5,690,219   13,038,907    6,992,412   14,180,418 
psf (d)                 $19.91       $16.53       $19.16       $20.60       $17.63 
tenants (e)                 59           53           64           33           37 
</TABLE>

                                                            2005 & 
                      2002         2003         2004        beyond 
                  ------------ ------------------------ ------------ 
square feet (a)      105,606      13,916      223,059       386,990 
% sq. ft. (b)           3.2%        0.4%         6.8%         11.7% 
annual rent (c)    2,586,065     281,171      981,460     9,429,272 
psf (d)               $24.49      $20.20        $4.40        $24.37 
tenants (e)                7           2            1             4 

(a) Total area in square feet covered by such leases 

(b) Percentage of total square feet represented by such leases 

(c) Annualized expiring base rental income represented by such leases in the 
    year of expiration plus 1996 tenant payments on account of real estate 
    tax and operating expense escalations, except leases with CPI increases 
    in lieu of expense recoveries. 

(d) Calculated as annual rent divided by square feet 

(e) The number of tenants whose leases will expire 

                                     S-37 

<PAGE> 

The Arlington County, Virginia Market 

   As of December 1996 there were approximately 27.6 million square feet of 
office space in the Arlington County, Virginia Market. According to Grubb & 
Ellis, the Arlington County, Virginia Market had an overall vacancy rate of 
3.6% as of December 1996. The Crystal City submarket (location of the Polk 
and Taylor Buildings), with approximately 11.3 million square feet, had a 
vacancy rate of 0.3% as of December 1996. The Rosslyn-Ballston Corridor 
(location of the Rosslyn, Virginia Portfolio), with approximately 15.1 
million square feet, had a vacancy rate of approximately 6.0% as of December 
1996. 

   The following chart describes each of the Company's Properties located in 
the Arlington County, Virginia Market. 

<TABLE>
<CAPTION>
                                 Year Built/   Rentable Area    No. of   Company's % 
           Property               Renovated   in Square Feet   Stories    Ownership         Parking 
 ------------------------------ ----------------------------   ----------------------  ----------------- 
<S>                                 <C>          <C>              <C>        <C>        <C>
Polk and Taylor Buildings(a)        1970           890,000        12          10%(b)    1,182-car garage 
1300 North 17th Street              1980           373,000        19         100%         667-car garage 
1616 North Ft. Myer Drive           1974           293,000        19         100%         627-car garage 
                                             --------------- 
    Total                                        1,556,000 
                                             =============== 
</TABLE>

(a) The Polk and Taylor Buildings are comprised of two buildings commonly 
    known as the James K. Polk Building (National Center 2) and the Zachary 
    Taylor Building (National Center 3), numbered 2521 and 2531 Jefferson 
    Davis Highway, respectively. 

(b) The Company holds a 10% general and limited partner interest in the 
    partnership that owns the Property. 


   The following chart sets forth Base Rents per square foot, Net Effective 
Rents per square foot, and the occupancy rate expressed as a percentage, as of
December 31, 1996, for each Property located in the Arlington County, Virginia
 Market. 

                                                    Net        Occupancy 
          Property               Base Rent     Effective Rent     Rate 
 --------------------------------------------  --------------- ----------- 
Polk and Taylor Buildings          $23.77          $19.23          100% 
1300 North 17th Street              24.24           16.97           98% 
1616 North Ft. Myer Drive           22.88           15.28           99% 
                             ----------------  --------------- ----------- 
    Total/Weighted Average         $23.71          $17.95           99% 
                             ================  =============== =========== 

   The following table sets forth lease expirations (in square feet) for the 
Company's Properties in the Arlington County, Virginia Market. See "Lease 
Expirations--All Properties" for a detailed description of lease expirations 
at each of the Company's Properties. 


<TABLE>
<CAPTION>
                      1997         1998         1999         2000         2001 
                  ------------ ------------------------ ------------ ------------ 
<S>                 <C>             <C>          <C>        <C>          <C>
square feet (a)        905,949       25,910        5,672      137,744      163,407 
% sq. ft. (b)            58.2%         1.7%         0.4%         8.9%        10.5% 
annual rent (c)     18,103,340      656,456      133,333    3,724,922    4,239,711 
psf (d)                 $19.98       $25.34       $23.51       $27.04       $25.95 
tenants (e)                 10            5            2           10            7 
</TABLE>

                                                            2005 & 
                      2002         2003         2004        beyond 
                  ------------ ------------------------ ------------ 
square feet (a)       64,395       84,134      28,794       126,477 
% sq. ft. (b)           4.1%         5.4%        1.9%          8.1% 
annual rent (c)    1,431,878    2,198,780     823,890     3,416,497 
psf (d)               $22.24       $26.13      $28.61        $27.01 
tenants (e)                5            4           2             4 

(a) Total area in square feet covered by such leases 

(b) Percentage of total square feet represented by such leases 

(c) Annualized expiring base rental income represented by such leases in the 
    year of expiration plus 1996 tenant payments on account of real estate 
    tax and operating expense escalations, except leases with CPI increases 
    in lieu of expense recoveries. 

(d) Calculated as annual rent divided by square feet 

(e) The number of tenants whose leases will expire 

                                     S-38 

<PAGE> 

The Fairfax County, Virginia Market 

   As of December 1996, there were approximately 62.4 million square feet of 
office space in the Fairfax County, Virginia Market, 21.0 million square feet 
of which are located in the Tysons Corner submarket, 13 million square feet 
of which are located in the Reston/Herndon submarket and 3.3 million square 
feet of which are located in the Rte. 28/Chantilly Submarket. According to 
Grubb & Ellis, the Fairfax County, Virginia Market had an overall vacancy 
rate of 6.7% as of December 1996 and the submarkets of Tysons Corner, 
Reston/Herndon and Rte. 28/ Chantilly had vacancy rates of 5.9%, 5.9% and 
14.7%, respectively as of such time. Grubb & Ellis also reports that Tysons 
Corner, Reston/Herndon and Rte. 28/Chantilly submarkets experienced Net 
Absorption of 1.6 million square feet, 486,000 square feet and 245,000 square 
feet, respectively, for the year ended December 31, 1996. 

   The following chart describes Centerpointe I and II, Pending Acquisitions, 
and each of the Company's Properties located in the Fairfax County, Virginia 
Market. 

                        Year Built/   Rentable Area    No. of    Company's % 
       Property          Renovated    in Square Feet   Stories    Ownership 
- ---------------------- ------------- ---------------  ---------  ------------- 
John Marshall I             1981         261,364         11          100% 
E.J. Randolph               1983         164,677         11          100% 
Northridge I                1988         124,319          6          100% 
                                     --------------- 
    Total Properties                     550,360 
                                     =============== 
 Pending Acquisitions 
- ---------------------- 
Centerpointe I              1988         204,481         11          100% 
Centerpointe II             1990         204,481         11          100% 
                                     --------------- 
    Total Properties                     408,962 
                                     =============== 



   The following chart sets forth Base Rents per square foot, Net Effective 
Rents per square foot, and the occupancy rate, expressed as a percentage, as of
December 31, 1996, for Centerpointe I and II, Pending Acquisitions and for each
Property located in the Fairfax County, Virginia Market. 

                                                    Net        Occupancy 
          Property               Base Rent     Effective Rent     Rate 
 --------------------------------------------  --------------- ----------- 
John Marshall I                    $18.25          $15.85          100% 
E.J. Randolph                       21.14           15.47           97% 
Northridge I                        25.96           19.34          100% 
                             ----------------  --------------- ----------- 
    Total/Weighted Average         $20.86          $16.52           99% 
                             ================  =============== =========== 
    Pending Acquisitions 
 ---------------------------- 
Centerpointe I & II                $16.26          $12.86          100% 



                                     S-39 

<PAGE> 

   The following table sets forth lease expirations (in square feet) for 
Centerpointe I and II, Pending Acquisitions, and the Properties in the 
Fairfax County, Virginia Market. See "Lease Expirations--All Properties" for 
a detailed description of lease expirations at each of the Company's 
Properties. 

<TABLE>

<CAPTION>
                                     1997         1998         1999         2000         2001 
                                 ------------ ------------ ------------ ------------------------ 
<S>             <C>                    <C>          <C>         <C>        <C>          <C>
Properties 
- --------------- 
Total 
  Properties    square feet (a)         2,576        3,223        1,801      132,410       61,870 
                % sq. ft. (b)            0.5%         0.6%         0.3%        24.1%        11.2% 
                annual rent (c)        75,085       72,195       75,588    3,454,029    1,582,669 
                psf (d)                $29.15       $22.40       $41.97       $26.09       $25.58 
                tenants (e)                 2            1            1            3            6 
Pending 
  Acquisitions 
- --------------- 
Centerpointe I  square feet (a)             0            0            0            0            0 
                % sq. ft. (b)            0.0%         0.0%         0.0%         0.0%         0.0% 
                annual rent (c)             0            0            0            0            0 
                psf (d)                 $0.00        $0.00        $0.00        $0.00        $0.00 
                tenants (e)                 0            0            0            0            0 
Centerpointe II square feet (a)        24,218       15,094       30,350       10,733        5,394 
                % sq. ft. (b)           11.8%         7.4%        14.8%         5.2%         2.6% 
                annual rent (c)       507,420      290,761      621,740      222,189      109,282 
                psf (d)                $20.95       $19.26       $20.49       $20.70       $20.26 
                tenants (e)                 3            4            3            2            1 
                                 ------------ ------------ ------------ ------------------------ 
Total 
  Properties 
  and Pending 
  Acquisitions  square feet (a)        26,794       18,317       32,151      143,143       67,264 
                % sq. ft. (b)            2.8%         1.9%         3.4%        14.9%         7.0% 
                annual rent (c)       582,505      362,956      697,328    3,676,218    1,691,952 
                psf (d)                $21.74       $19.82       $21.69       $25.68       $25.15 
                tenants (e)                 5            5            4            5            7 
</TABLE>
<TABLE>
<CAPTION>
                                                                           2005 & 
                                     2002         2003         2004        beyond 
                                 ------------ ------------ ------------  ------------ 
<S>             <C>                <C>           <C>        <C>           <C>
Properties 
- --------------- 
Total 
  Properties    square feet (a)     14,958           0         70,366       258,576 
                % sq. ft. (b)         2.7%        0.0%          12.8%         47.0% 
                annual rent (c)    315,959           0      1,691,534     6,660,918 
                psf (d)             $21.12       $0.00         $24.04        $25.76 
                tenants (e)              2           0              3             1 
Pending 
  Acquisitions 
- --------------- 
Centerpointe I  square feet (a)          0           0              0       203,630 
                % sq. ft. (b)         0.0%        0.0%           0.0%        100.0% 
                annual rent (c)          0           0              0     4,245,686 
                psf (d)              $0.00       $0.00          $0.00        $20.85 
                tenants (e)              0           0              0             1 
Centerpointe II square feet (a)     27,159           0              0        91,018 
                % sq. ft. (b)        13.3%        0.0%           0.0%         44.5% 
                annual rent (c)    551,185           0              0     2,092,684 
                psf (d)             $20.29       $0.00          $0.00        $22.99 
                tenants (e)              4           0              0             2 
                                 ------------ ------------ ------------  ------------ 
Total 
  Properties 
  and Pending 
  Acquisitions  square feet (a)     42,117           0         70,366       553,224 
                % sq. ft. (b)         4.4%        0.0%           7.3%         57.7% 
                annual rent (c)    867,143           0      1,691,534    12,999,287 
                psf (d)             $20.59       $0.00         $24.04        $23.50 
                tenants (e)              6           0              3             4 
</TABLE>


(a) Total area in square feet covered by such leases 
(b) Percentage of total square feet represented by such leases 
(c) Annualized expiring base rental income represented by such leases in the 
    year of expiration plus 1996 tenant payments on account of real estate 
    tax and operating expense escalations, except leases with CPI increases 
    in lieu of expense recoveries. 
(d) Calculated as annual rent divided by square feet 
(e) The number of tenants whose leases will expire 

Washington, D.C. Office Market 

   As of December 1996 there were approximately 96.6 million square feet of 
office space in the Washington, D.C. Office Market, approximately 28 million 
of which is located in the East End submarket. 1333 H Street, N.W. is located 
in the East End submarket. According to Grubb & Ellis, the Washington, D.C. 
Office Market had an overall vacancy rate of 10.6% as of December 1996, while 
the East End submarket experienced a vacancy rate of 10.3% as of such time. 

   1333 H Street, N.W. 1333 H Street N.W. is an 11-story office property 
comprising approximately 239,000 square feet, approximately 205,000 of which 
was built in 1982. The Company owns a 100% fee interest in the Property. 

   As of December 31, 1996, the average annual Base Rent per square foot and 
average annual Net Effective Rent per square foot for the 1333 H Street, N.W. 
Property were $27.10 and $20.01, respectively. As of December 31, 1996, the 
Property was approximately 90% leased. 

   The following table sets forth lease expirations (in square feet) for 1333 
H Street. 

<TABLE>

<CAPTION>
                                                                                                     2005 & 
                    1997      1998       1999      2000      2001      2002      2003       2004     beyond 
                  --------- --------- --------- --------- ---------  --------- --------- ---------  --------- 
<S>                <C>       <C>        <C>      <C>        <C>      <C>        <C>        <C>     <C>
square feet (a)     11,020     4,045        0      8,835     2,945      57,041   14,708        0     108,536 
% sq. ft. (b)         4.6%      1.7%     0.0%       3.7%      1.2%       23.9%     6.2%     0.0%       45.5% 
annual rent (c)    292,571   115,428        0    243,846    79,692   1,744,884  461,684        0   3,660,672 
psf (d)             $26.55    $28.54    $0.00     $27.60    $27.06      $30.59   $31.39    $0.00      $33.73 
tenants (e)              4         3        0          3         1           1        1        0           2 
</TABLE>


(a) Total area in square feet covered by such leases 
(b) Percentage of total square feet represented by such leases 

                                     S-40 

<PAGE> 

(c) Annualized expiring base rental income represented by such leases in the 
    year of expiration plus 1996 tenant payments on account of real estate 
    tax and operating expense escalations, except leases with CPI increases 
    in lieu of expense recoveries. 
(d) Calculated as annual rent divided by square feet 
(e) The number of tenants whose leases will expire 

Suburban Chicago Office Market 

   As of December 31, 1996, there were approximately 60.3 million square feet 
of office space in the Suburban Chicago Office Market. Approximately 21 
million square feet of which is located in the East-West Corridor submarket, 
approximately 12.5 million square feet of which is located in the North 
Suburban submarket and approximately 10 million square feet of which is 
located in the O'Hare submarket. The AT&T Plaza building and the Pending 
Acquisition, Westbrook Corporate Center, are located in the East-West 
Corridor submarket, the Tri-State International property is located in the 
North Suburban submarket and Presidents Plaza is located in the O'Hare 
Submarket. According to Grubb & Ellis the Suburban Chicago Office Market had 
an overall vacancy rate of 11.2% as of December 31, 1996. The East-West 
Corridor submarket, North Suburban submarket and O'Hare submarket had vacancy 
rates of 9.8% 11.2% and 14.8%, respectively, for the same period. Grubb & 
Ellis also reports that the East-West Corridor, North Suburban and O'Hare 
submarkets experienced Net Absorption of 524,000 square feet, 58,000 square 
feet and 242,000 square feet, respectively, for the year ended December 31, 
1996. 

   The following chart describes the Westbrook Corporate Center, a Pending 
Acquisition, and each of the Company's Properties located in the Suburban 
Chicago Office Market. 

<TABLE>
<CAPTION>
                              Year Built/    Rentable Area   No. of     Company's % 
          Property             Renovated    in Square Feet   Stories     Ownership 
 ----------------------------------------- ---------------  ---------  ------------- 
<S>                            <C>            <C>              <C>          <C>
AT&T Plaza                        1984           225,318        8           100% 
Tri-State International           1986           548,000       (a)          100% 
Presidents Plaza               1980-1982         791,000       (b)          100% 
                                           --------------- 
    Total Properties                           1,564,318 
                                           =============== 
     Pending Acquisition 
 ---------------------------- 
Westbrook Corporate Center     1985-1996       1,106,000       (c)          100% 
</TABLE>


(a) The Tri-State International complex consists of five three-to-five-story 
    buildings. 

(b) Presidents Plaza consists of four connected 10- and 12-story office 
    buildings. 

(c) Westbrook Corporate Center consists of five 10-story office buildings. 

    The following chart sets forth Base Rents per square foot, Net Effective
Rents per square foot, and the occupancy rate expressed as a percentage, as of
December 31, 1996, for each Property in the Suburban Chicago Office Market, as
well as the Westbrook Corporate Center, a Pending Acquisition.

                                                    Net        Occupancy 
          Property               Base Rent     Effective Rent     Rate 
 --------------------------------------------  --------------- ----------- 
AT&T Plaza                         $20.89          $14.22          100% 
Tri-State International             22.92           16.00           74%(a) 
Presidents Plaza                    19.32           12.12           90% 
                             ----------------  --------------- ----------- 
    Total/Weighted Average         $20.81          $13.78           86% 
                             ================  =============== =========== 
     Pending Acquisition 
 ---------------------------- 
Westbrook Corporate Center         $23.75          $17.62           90% 

(a) The Company is currently negotiating leases that, if signed, would 
    increase the occupancy rate of this Property to 85%. No assurances can be 
    given that these leases will be signed. 



                                     S-41 

<PAGE> 

   The following chart sets forth lease expirations (in square feet) for 
Westbrook Corporate Center, a Pending Acquisition, and the Company's 
Properties located in the Suburban Chicago Office Market. See "Lease 
Expirations--All Properties" for a detailed description of lease expirations 
at each of the Company's Properties. 

<TABLE>

<CAPTION>
 Properties                           1997       1998        1999       2000       2001 
 ----------                           ----       ----        ----       ----       ----
<S>             <C>              <C>        <C>         <C>        <C>        <C>
Total 
  Properties    square feet (a)    185,270     84,556     139,618    130,898    148,772 
                % sq. ft (b)         11.8%       5.4%        8.9%       8.4%       9.5% 
                annual rent (c)  3,999,836  1,787,574   3,464,805  2,878,835  3,754,977 
                psf (d)             $21.59     $21.14      $24.82     $21.99     $25.24 
                tenants (e)             24         17          18         15         16 
Pending Acquisition 
 ------------------------------- 
Westbrook 
  Corporate 
  Center        square feet (a)     66,228    106,823      97,347    256,406    204,350 
                % sq. ft. (b)         6.0%       9.7%        8.8%      23.2%      18.5% 
                annual rent (c)  1,747,948  2,757,545   2,765,629  8,023,751  5,558,367 
                psf (d)             $26.39     $25.81      $28.41     $31.29     $27.20 
                tenants (e)             12         14          15         19         18 
                                 ---------  ---------   ---------  ---------  ---------
Total 
  Properties 
  and 
  Pending 
  Acquisitions  square feet (a)    251,498    191,379     236,965    387,304    353,122 
                % sq. ft. (b)         9.4%       7.2%        8.9%      14.5%      13.2% 
                annual rent (c)  5,747,784  4,545,119   6,230,434 10,902,586  9,313,345 
                psf (d)             $22.85     $23.75      $26.29     $28.15     $26.37 
                tenants (e)             36         31          33         34         34 
</TABLE>

                                                                      2005 & 
Properties                            2002       2003        2004     beyond 
Total 
  Properties    square feet (a)     46,748    100,470      62,734    440,895 
                % sq. ft (b)          3.0%       6.4%        4.0%      28.2% 
                annual rent (c)  1,220,090  2,534,563   1,601,557 12,923,801 
                psf (d)             $26.10     $25.23      $25.53     $29.31 
                tenants (e)              5          6           3         10 
Pending Acquisition 
 ------------------------------- 
Westbrook 
  Corporate 
  Center        square feet (a)     88,927    101,787      12,275     60,314 
                % sq. ft. (b)         8.0%       9.2%        1.1%       5.5% 
                annual rent (c)  2,484,161  2,501,276     396,525  1,544,220 
                psf (d)             $27.93     $24.57      $32.30     $25.60 
                tenants (e)              6          5           2          8 
                                 ---------  ---------     -------  ---------
Total 
  Properties 
  and 
  Pending 
  Acquisitions  square feet (a)    135,675    202,257      75,009    501,209 
                % sq. ft. (b)         5.1%       7.6%        2.8%      18.8% 
                annual rent (c)  3,704,251  5,035,839   1,998,081 14,468,021 
                psf (d)             $27.30     $24.90      $26.64     $28.87 
                tenants (e)             11         11           5         18 



(a) Total area in square feet covered by such leases 

(b) Percentage of total square feet represented by such leases 

(c) Annualized expiring base rental income represented by such leases in the 
    year of expiration plus 1996 tenant payments on account of real estate 
    tax and operating expense escalations, except leases with CPI increases 
    in lieu of expense recoveries. 

(d) Calculated as annual rent divided by square feet 

(e) The number of tenants whose leases will expire 

The Suburban Philadelphia Office Market 

   As of December 1996 there were approximately 35.2 million square feet of 
office space in the Suburban Philadelphia Office Market. According to Grubb & 
Ellis, the entire Suburban Philadelphia Office Market had a vacancy rate of 
11.5% in December 1996. 

   One, Two, Three and Five Westlakes Drive are located in the Suburban 
Philadelphia Office Market. The average Base Rent per square foot and the 
average annual Net Effective Rent per square foot for the four Properties 
were $20.40 and $15.86, respectively, as of December 31, 1996. 

   Westlakes Office Park. Each building in the Westlakes Office Park is a 
three-story office building. These buildings were constructed between 1988 
and 1990. Collectively, these buildings contain an aggregate of approximately 
444,000 square feet. As of December 31, 1996, these buildings were 
approximately 98% leased. The Company has entered into a contract to sell the 
Westlakes Office Park, the consummation of which is subject to numerous 
closing conditions, including, but not limited to, satisfactory completion of 
the purchaser's due diligence. At the Company's option, the transaction may 
be structured as a like-kind exchange. 

   The following table sets forth lease expirations (in square feet) for the 
Company's Properties in the Suburban Philadelphia Office Market. See "Lease 
Expirations--All Properties" for a detailed description of lease expirations 
at each of the Company's Properties. 

<TABLE>

<CAPTION>
                                                                                                     2005 & 
                    1997      1998       1999      2000      2001      2002      2003       2004     beyond 
                  --------- --------- --------- --------- ---------  --------- --------- ---------  --------- 
<S>                <C>       <C>      <C>       <C>         <C>       <C>      <C>         <C>      <C>
square feet (a)     31,170    23,558     53,467   180,951    24,552    27,572     56,557       0     40,852 
% sq. ft. (b)         7.0%      5.3%      12.0%     40.8%      5.5%      6.2%      12.7%    0.0%       9.2% 
annual rent (c)    622,385   505,948  1,159,030 4,298,994   573,093   634,975  1,315,506       0    866,432 
psf (d)             $19.97    $21.48     $21.68    $23.76    $23.34    $23.03     $23.26   $0.00     $21.21 
tenants (e)              7         5          7         9         7         2          2       0          3 
</TABLE>


(a) Total area in square feet covered by such leases 

(b) Percentage of total square feet represented by such leases 

(c) Annualized expiring base rental income represented by such leases in the 
    year of expiration plus 1996 tenant payments on account of real estate 
    tax and operating expense escalations, except leases with CPI increases 
    in lieu of expense recoveries. 

                                     S-42 

<PAGE> 

(d) Calculated as annual rent divided by square feet 

(e) The number of tenants whose leases will expire 

The West Los Angeles Office Market 

   As of December 1996, there were approximately 33.6 million square feet of 
office space in the West Los Angeles Office Market. The Westwood submarket, 
the location of 10960 Wilshire Boulevard and the Pending Acquisition 10880 
Wilshire Boulevard, had approximately 2.8 million square feet of office 
space. According to CB Commercial, the West Los Angeles Office Market had an 
overall vacancy rate of 11.4% as of December 31, 1996, and the Westwood 
submarket had a vacancy rate of 9.1% at such time. 

   10960 Wilshire Boulevard. 10960 Wilshire Boulevard consists of 
approximately 544,000 square feet in a 23- story office building. The 
Property was built in 1971 and has undergone approximately $39 million of 
capital improvements since 1992. 

   As of December 31, 1996, the average annual Base Rent per square foot and 
average annual Net Effective Rent per square foot for 10960 Wilshire 
Boulevard were $24.00 and $18.53, respectively. As of December 31, 1996 the 
Property was approximately 89% leased. 

   10880 Wilshire Boulevard. 10880 Wilshire Boulevard consists of 
approximately 531,000 square feet in a 23- story office building. The 
Property was built in 1970 and has undergone approximately $34 million of 
capital improvements since 1992. 

   As of December 31, 1996, the average annual Base Rent per square foot and 
average annual Net Effective Rent per square foot for 10880 Wilshire 
Boulevard were $20.98 and $16.39, respectively. As of December 31, 1996, the 
Property was approximately 85% leased. 

   The following table sets forth lease expirations (in square feet) for 
10960 Wilshire Boulevard and 10880 Wilshire Boulevard, a Pending Acquisition. 

<TABLE>

<CAPTION>
Property                            1997      1998      1999      2000       2001 
- ---------------                  --------- ---------  --------- --------- --------- 
<S>             <C>               <C>         <C>      <C>      <C>         <C>
10960 Wilshire 
  Boulevard     square feet (a)    23,922      3,030     9,126    162,021    20,761 
                % sq. ft. (b)        4.4%       0.6%      1.7%      29.8%      3.8% 
                annual rent (c)   585,840     88,608   262,561  4,561,300   598,825 
                psf (d)            $24.49     $29.24    $28.77     $28.15    $28.84 
                tenants (e)             1          1         3         14         3 
Pending 
  Acquisition 
- --------------- 
10880 Wilshire 
  Boulevard     square feet (a)         0      7,167    22,814     49,900   119,702 
                % sq. ft. (b)        0.0%       1.3%      4.3%       9.4%     22.5% 
                annual rent (c)         0    204,103   616,555  1,284,960 3,533,553 
                psf (d)              $0.0     $28.48    $27.03     $25.75    $29.52 
                tenants (e)             0          2         5         10        16 
Total Property 
  and 
  Pending 
  Acquisition   square feet (a)    23,922     10,197    31,940    211,921   140,463 
                % sq. ft (b)         2.2%       0.9%      3.0%      19.7%     13.1% 
                annual rent (c)   585,840    292,711   879,116  5,846,260 4,132,377 
                psf (d)            $24.49     $28.71    $27.52     $27.59    $29.42 
                tenants (e)             1          3         8         24        19 
</TABLE>
                                                                 2005 & 

Property                            2002      2003      2004     beyond 
- ---------------                  --------- ---------  --------- --------- 
10960 Wilshire 
  Boulevard     square feet (a)     52,382     34,801    10,658   167,586 
                % sq. ft. (b)         9.6%       6.4%      2.0%     30.8% 
                annual rent (c)  1,809,183  1,134,632   350,807 5,664,221 
                psf (d)             $34.54     $32.60    $32.91    $33.80 
                tenants (e)              3          3         1         4 
Pending 
  Acquisition 
- --------------- 
10880 Wilshire 
  Boulevard     square feet (a)    150,813          0    83,049    17,566 
                % sq. ft. (b)        28.4%       0.0%     15.6%      3.3% 
                annual rent (c)  4,572,705          0 2,691,079   592,427 
                psf (d)             $30.32      $0.00    $32.40    $33.73 
                tenants (e)              7          0         2         1 
Total Property 
  and 
  Pending 
  Acquisition   square feet (a)    203,195     34,801    93,707   185,152 
                % sq. ft (b)         18.9%       3.2%      8.7%     17.2% 
                annual rent (c)  6,381,888  1,134,632 3,041,886 6,256,648 
                psf (d)             $31.41     $32.60    $32.46    $33.79 
                tenants (e)             10          3         3         5 


(a) Total area in square feet covered by such leases 

(b) Percentage of total square feet represented by such leases 

(c) Annualized expiring base rental income represented by such leases plus 
    1996 tenant payments on account of real estate tax and operating expense 
    escalations. 

(d) Calculated as annual rent divided by square feet 

(e) The number of tenants whose leases will expire 

                                     S-43 

<PAGE> 
Silicon Valley Office/R&D Market 

   Shoreline Technology Park and Lake Marriott Business Park are located in 
the Silicon Valley Office/R&D Market. According to Cornish & Carey, the 
entire Silicon Valley Office/R&D Market, which consists of approximately 129 
million rentable square feet, had an overall vacancy rate of 5.3% as of 
December 31, 1996. Cornish & Carey also reports that the Silicon Valley 
Office/R&D Market experienced Net Absorption of approximately 1.7 million 
square feet in 1996. 

   Shoreline Technology Park. Shoreline Technology Park consists of twelve 
office buildings totaling approximately 727,000 rentable square feet. The 
Property is located in Mountain View, California and was constructed between 
1985 and 1991. The Company owns a 100% fee interest in the Property. As of 
December 31, 1996, the Property was 100% leased. 

   Lake Marriott Business Park. Lake Marriott Business Park consists of seven 
office buildings totaling approximately 400,000 rentable square feet. The 
Property is located in Santa Clara, California and was constructed in 1981. 
The Company owns a 100% fee interest in the Property. As of December 31, 
1996, the Property was 100% leased. 


    Shoreline Technology Park and substantially all of the Lake Marriott
Business Park are leased pursuant to triple net leases which include periodic
increases in net rent. Net rent, and net rent on a straight-line basis taking
into effect rent increases, for Shoreline Technology Park were $17.84 and
$18.77, respectively, and for Lake Marriott Business Park were $9.80 and $10.78,
respectively.



   The following table sets forth lease expirations (in square feet) for both 
of the Company's Properties in the Silicon Valley Office/R&D Market. 


<TABLE>

<CAPTION>
                                                                                                        2005 & 
                      1997      1998      1999       2000       2001    2002      2003      2004      beyond 
<S>                <C>       <C>       <C>      <C>        <C>         <C>       <C>       <C>     <C>
square feet (a)     60,548     9,465    24,548    509,320    205,932       0         0         0     314,997 
% sq. ft. (b)         5.4%      0.8%      2.2%      45.2%      18.3%      0%        0%        0%       28.0% 
annual rent (c)    938,578   133,634   241,383  7,991,481  3,554,326       0         0         0   5,967,949 
psf (d)             $15.50    $14.12     $9.83     $15.69     $17.26   $0.00     $0.00     $0.00      $18.95 
tenants (e)              2         2         3          7          1       0         0         0           2 
</TABLE>


(a) Total area in square feet covered by such leases 

(b) Percentage of total square feet represented by such leases 

(c) Annualized expiring net rental income represented by such leases. 

(d) Calculated as annual rent divided by square feet 

(e) The number of tenants whose leases will expire 

                                     S-44 

<PAGE> 


          Lease Expirations--All Properties and Pending Acquisitions 

   The following tables set forth lease expirations (in square feet) for each 
of the Company's Properties and Pending Acquisitions by market area. 
<TABLE>
<CAPTION>
                                                Lease Expiration--All Markets 
                                 ----------------------------------------------------------- 
Property                            1997        1998        1999        2000        2001 
- ---------------                  ----------- ----------- ----------- ----------- ----------- 
<S>             <C>               <C>        <C>         <C>         <C>         <C>
Downtown Boston square feet (a)     403,735     408,357     443,870     408,509     723,343 
                % sq. ft. (b)         10.0%       10.1%       11.0%       10.1%       17.9% 
                annual rent (c)   9,668,253  12,361,782  12,045,829  10,236,753  22,730,854 
                psf (d)              $23.95      $30.27      $27.14      $25.06      $31.42 
                tenants (e)              71          64          65          66          43 
Suburban Boston square feet (a)     407,248     204,784     187,821     190,127     177,738 
                % sq. ft (b)          20.9%       10.5%        9.6%        9.8%        9.1% 
                annual rent (c)   8,125,838   4,268,136   3,482,584   4,194,448   4,126,630 
                psf (d)              $19.95      $20.84      $18.54      $22.06      $23.22 
                tenants (e)              51          38          28          30          32 
Cambridge       square feet (a)           0       3,499       1,411       6,320     315,964 
                % sq. ft (b)           0.0%        0.7%        0.3%        1.3%       66.6% 
                annual rent (c)           0     127,832      31,606      83,269   8,165,274 
                psf (d)               $0.00      $36.53      $22.40      $13.18      $25.84 
                tenants (e)               0           1           1           1           4 
Central 
  Perimeter 
  Atlanta       square feet (a)     302,600     344,306     680,607     339,519     804,125 
                % sq. ft (b)           9.2%       10.4%       20.6%       10.3%       24.3% 
                annual rent (c)   6,023,929   5,690,219  13,038,907   6,992,412  14,180,418 
                psf (d)              $19.91      $16.53      $19.16      $20.60      $17.63 
                tenants (e)              59          53          64          33          37 
Arlington 
  County, VA    square feet (a)     905,949      25,910       5,672     137,744     163,407 
                % sq. ft (b)          58.2%        1.7%        0.4%        8.9%       10.5% 
                annual rent (c)  18,103,340     656,456     133,333   3,724,928   4,239,711 
                psf (d)              $19.98      $25.34      $23.51      $27.04      $25.95 
                tenants (e)              10           5           2          10           7 
Fairfax County, 
  VA            square feet (a)      26,794      18,317      32,151     143,143      67,264 
                % sq. ft (b)           2.8%        1.9%        3.4%       14.9%        7.0% 
                annual rent (c)     582,505     362,956     697,328   3,676,218   1,691,952 
                psf (d)              $21.74      $19.82      $21.69      $25.68      $25.15 
                tenants (e)               5           5           4           5           7 
Washington, D.C square feet (a)      11,020       4,045           0       8,835       2,945 
                % sq. ft (b)           4.6%        1.7%        0.0%        3.7%        1.2% 
                annual rent (c)     292,571     115,428           0     243,846      79,692 
                psf (d)              $26.55      $28.54       $0.00      $27.60      $27.06 
                tenants (e)               4           3           0           3           1 
Suburban 
  Chicago       square feet (a)     251,498     191,379     236,965     387,304     353,122 
                % sq. ft (b)           9.4%        7.2%        8.9%       14.5%       13.2% 
                annual rent (c)   5,747,784   4,545,119   6,230,434  10,902,586   9,313,345 
                psf (d)              $22.85      $23.75      $26.29      $28.15      $26.37 
                tenants (e)              36          31          33          34          34 
Suburban 
  Philadelphia  square feet (a)      31,170      23,558      53,467     180,951      24,552 
                % sq. ft (b)           7.0%        5.3%       12.0%       40.8%        5.5% 
                annual rent (c)     622,385     505,948   1,159,030   4,298,994     573,093 
                psf (d)              $19.97      $21.48      $21.68      $23.76      $23.34 
                tenants (e)               7          51           7           9           7 
West Los 
  Angeles       square feet (a)      23,922      10,197      31,940     211,921     140,463 
                % sq. ft (b)           2.2%        0.9%        3.0%       19.7%       13.1% 
                annual rent (c)     585,840     292,711     879,116   5,846,260   4,132,377 
                psf (d)              $24.49      $28.71      $27.52      $27.59      $29.42 
                tenants (e)               1           3           8          24          19 
Silicon Valley  square feet (a)      60,548       9,465      24,548     509,320     205,932 
                % sq. ft (b)           5.4%        0.8%        2.2%       45.2%       18.3% 
                annual rent (c)     938,578     133,634     241,383   7,991,481   3,554,326 
                psf (d)              $15.50      $14.12       $9.83      $15.69      $17.26 
                tenants (e)               2           2           3           7           1 
                                 ----------- ----------- ----------- ----------- ----------- 
Total 
  Properties    square feet (a)   2,424,484   1,243,817   1,698,452   2,523,693   2,978,855 
                % sq. ft (b)          13.6%        7.0%        9.5%       14.2%       16.7% 
                annual rent (c)  50,691,022  29,060,220  37,939,551  58,191,190  72,787,672 
                psf (d)              $20.91      $23.36      $22.34      $23.06      $24.43 
                tenants (e)             246         210         215         222         192 
</TABLE>

<TABLE>
<CAPTION>
                                                                       2005 & 
Property                            2002        2003        2004       beyond 
- ---------------                  ----------- ----------- ----------- ----------- 
<S>             <C>              <C>          <C>         <C>        <C>
Downtown Boston square feet (a)     513,007     171,941     134,147     685,647 
                % sq. ft. (b)         12.7%        4.3%        3.3%       17.0% 
                annual rent (c)  16,523,017   4,925,273   4,064,996  22,729,697 
                psf (d)              $32.21      $28.65      $30.30      $33.15 
                tenants (e)              21           8          11          18 
Suburban Boston square feet (a)      77,740      44,457      97,400     497,760 
                % sq. ft (b)           4.0%        2.3%        5.0%       25.6% 
                annual rent (c)   2,099,918   1,064,518   2,093,856  11,093,598 
                psf (d)              $27.01      $23.94      $21.50      $22.29 
                tenants (e)              12           3           4           8 
Cambridge       square feet (a)     107,667      28,000           0           0 
                % sq. ft (b)          22.7%        5.9%        0.0%        0.0% 
                annual rent (c)   2,480,979     709,712           0           0 
                psf (d)              $23.04      $25.35       $0.00       $0.00 
                tenants (e)               2           1           0           0 
Central 
  Perimeter 
  Atlanta       square feet (a)     105,606      13,916     223,059     386,990 
                % sq. ft (b)           3.2%        0.4%        6.8%       11.7% 
                annual rent (c)   2,586,065     281,171     981,460   9,429,272 
                psf (d)              $24.49      $20.20       $4.40      $24.37 
                tenants (e)               7           2           1           4 
Arlington 
  County, VA    square feet (a)      64,395      84,134      28,794     126,477 
                % sq. ft (b)           4.1%        5.4%        1.9%        8.1% 
                annual rent (c)   1,431,878   2,198,780     823,890   3,416,497 
                psf (d)              $22.24      $26.13      $28.61      $27.01 
                tenants (e)               5           4           2           4 
Fairfax County, 
  VA            square feet (a)      42,117           0      70,366     553,224 
                % sq. ft (b)           4.4%        0.0%        7.3%       57.7% 
                annual rent (c)     867,143           0   1,691,534  12,999,287 
                psf (d)              $20.59       $0.00      $24.04      $23.50 
                tenants (e)               6           0           3           4 
Washington, D.C square feet (a)      57,041      14,708           0     108,536 
                % sq. ft (b)          23.9%        6.2%        0.0%       45.5% 
                annual rent (c)   1,744,884     461,684           0   3,660,672 
                psf (d)              $30.59      $31.39       $0.00      $33.73 
                tenants (e)               1           1           0           2 
Suburban 
  Chicago       square feet (a)     135,675     202,257      75,009     501,209 
                % sq. ft (b)           5.1%        7.6%        2.8%       18.8% 
                annual rent (c)   3,704,251   5,035,839   1,998,081  14,468,021 
                psf (d)              $27.30      $24.90      $26.64      $28.87 
                tenants (e)              11          11           5          18 
Suburban 
  Philadelphia  square feet (a)      27,572      56,557           0      40,852 
                % sq. ft (b)           6.2%       12.7%        0.0%        9.2% 
                annual rent (c)     634,975   1,315,506           0     866,432 
                psf (d)              $23.03      $23.26       $0.00      $21.21 
                tenants (e)               2           2           0           3 
West Los 
  Angeles       square feet (a)     203,195      34,801      93,707     185,152 
                % sq. ft (b)          18.9%        3.2%        8.7%       17.2% 
                annual rent (c)   6,381,888   1,134,632   3,041,886   6,256,648 
                psf (d)              $31.41      $32.60      $32.46      $33.79 
                tenants (e)              10           3           3           5 
Silicon Valley  square feet (a)           0           0           0     314,997 
                % sq. ft (b)           0.0%        0.0%        0.0%       28.0% 
                annual rent (c)           0           0           0   5,967,949 
                psf (d)               $0.00       $0.00       $0.00      $18.95 
                tenants (e)               0           0           0           2 
                                 ----------- ----------- ----------- ----------- 
Total 
  Properties    square feet (a)   1,334,015     650,771     722,482   3,400,844 
                % sq. ft (b)           7.5%        3.7%        4.1%       19.1% 
                annual rent (c)  38,455,000  17,127,115  14,695,703  90,888,073 
                psf (d)              $28.83      $26.32      $20.34      $26.73 
                tenants (e)              77          35          29          68 
</TABLE>


(a) Total area in square feet covered by such leases 

(b) Percentage of total square feet represented by such leases 

(c) Annualized expiring base rental income represented by such leases in the 
    year of expiration plus 1996 tenant payments on account of real estate 
    tax and operating expense escalations, except leases with CPI increases 
    in lieu of expense recoveries. 

(d) Calculated as annual rent divided by square feet 

(e) The number of tenants whose leases will expire 


                                     S-45 


<PAGE> 

<TABLE>
<CAPTION>
                                       Lease Expiration--Downtown Boston Office Market 
                                 ----------------------------------------------------------- 
Property                            1997        1998        1999        2000        2001 
- ---------------                  ----------- ----------- ----------- ----------- ----------- 
<S>             <C>               <C>         <C>         <C>         <C>         <C>
175 Federal 
  Street        square feet (a)       9,619       4,775           0      33,484      25,290 
                % sq. ft. (b)          4.7%        2.3%        0.0%       16.5%       12.4% 
                annual rent (c)     223,958     195,627           0     826,525     663,919 
                psf (d)              $23.28      $40.97       $0.00      $24.68      $26.25 
                tenants (e)               3           1           0           7           8 
Center Plaza    square feet (a)      85,760      92,475      36,643      96,244      50,791 
                % sq. ft (b)          13.2%       14.2%        5.6%       14.8%        7.8% 
                annual rent (c)   1,976,095   2,239,103     823,162   2,515,817   1,366,597 
                psf (d)              $23.04      $24.21      $22.46      $26.14      $26.91 
                tenants (e)              12           7           9          12           8 
One Post Office 
  Sq.           square feet (a)      38,051      32,702      32,302      33,536     446,892 
                % sq. ft (b)           5.0%        4.3%        4.2%        4.4%       58.5% 
                annual rent (c)   1,093,862     905,686     953,178   1,026,925  13,453,695 
                psf (d)              $28.75      $27.70      $29.51      $30.62      $30.11 
                tenants (e)               8           6          11           6           4 
South Station 
  (g)           square feet (a)       1,586      11,541       1,401       2,093         105 
                % sq. ft (b)           1.1%        7.8%        0.9%        1.4%        0.1% 
                annual rent (c)     174,128   1,109,103     399,092     286,215      21,078 
                psf (d)             $109.79      $96.10     $284.86     $136.75     $200.74 
                tenants (e)               4           2           4           4           1 
Rowes Wharf     square feet (a)      73,034      53,057      40,602      15,569      10,356 
                % sq. ft (b)          21.2%       15.4%       11.8%        4.5%        3.0% 
                annual rent (c)   1,924,484   1,437,340   1,269,229     513,086     308,983 
                psf (d)              $26.35      $27.09      $31.26      $32.96      $29.84 
                tenants (e)               8           9           7           3           2 
150 Federal (f) square feet (a)      14,138       3,635      78,668      44,562      13,996 
                % sq. ft (b)           2.7%        0.7%       14.8%        8.4%        2.6% 
                annual rent (c)     330,912     122,024   1,629,766   1,510,974     360,211 
                psf (d)              $23.41      $33.57      $20.72      $33.91      $25.74 
                tenants (e)               2           3           4           7           3 
Russia Wharf    square feet (a)      56,638      34,028      65,854      84,195      14,895 
                % sq. ft (b)          18.2%       10.9%       21.2%       27.1%        4.8% 
                annual rent (c)     853,672     554,518     998,859   1,357,632     258,532 
                psf (d)              $15.07      $16.30      $15.17      $16.12      $17.36 
                tenants (e)              13           7           6           9           4 
75 Federal      square feet (a)      23,182      43,757      53,476      39,339      20,603 
                % sq. ft (b)           9.2%       17.3%       21.1%       15.5%        8.1% 
                annual rent (c)     567,832   1,240,157   1,703,688     898,321     400,431 
                psf (d)              $24.49      $28.34      $31.86      $22.84      $19.44 
                tenants (e)               6          11           6           5           3 
101 Federal     square feet (a)      54,725     116,792      95,071       6,475     116,866 
                % sq. ft (b)           9.8%       20.9%       17.0%        1.2%       20.9% 
                annual rent (c)   1,681,207   4,253,126   3,612,460     208,090   5,427,680 
                psf (d)              $30.72      $36.42      $38.00      $32.14      $46.44 
                tenants (e)               5          11           8           3           5 
Two Oliver      square feet (a)      47,002      15,595      39,853      53,012      23,549 
                % sq. ft (b)          17.4%        5.8%       14.8%       19.6%        8.7% 
                annual rent (c)     842,103     305,100     656,395   1,093,167     469,728 
                psf (d)              $17.92      $19.56      $16.47      $20.62      $19.95 
                tenants (e)              10           7          10          10           5 
                                 ----------- ----------- ----------- ----------- ----------- 
Total 
  Properties    square feet (a)     403,735     408,357     443,870     408,509     723,343 
                % sq. ft (b)          10.0%       10.1%       11.0%       10.1%       17.9% 
                annual rent (c)   9,668,253  12,361,782  12,045,829  10,236,753  22,730,854 
                psf (d)              $23.95      $30.27      $27.14      $25.06      $31.42 
                tenants (e)              71          64          65          66          43 
</TABLE>

                                                                       2005 & 
Property                            2002        2003        2004       beyond 
- ---------------                  ----------- ----------- ----------- -----------
175 Federal 
  Street        square feet (a)      66,306           0       6,793      45,482 
                % sq. ft. (b)         32.6%        0.0%        3.3%       22.4% 
                annual rent (c)   2,300,303           0     181,101   1,461,168 
                psf (d)              $34.69       $0.00      $26.66      $32.13 
                tenants (e)               2           0           1           1 
Center Plaza    square feet (a)      22,500     128,201      40,035      57,235 
                % sq. ft (b)           3.5%       19.7%        6.2%        8.8% 
                annual rent (c)     744,921   3,668,509   1,194,472   1,689,255 
                psf (d)              $33.11      $28.62      $29.84      $29.51 
                tenants (e)               5           2           4           6 
One Post Office 
  Sq.           square feet (a)           0       8,673           0     164,434 
                % sq. ft (b)           0.0%        1.1%        0.0%       21.5% 
                annual rent (c)           0     322,809           0   4,446,925 
                psf (d)               $0.00      $37.22       $0.00      $27.04 
                tenants (e)               0           1           0           2 
South Station 
  (g)           square feet (a)     125,999         500       2,410         725 
                % sq. ft (b)          84.8%        0.3%        1.6%        0.5% 
                annual rent (c)   4,460,478      82,300     394,562     156,310 
                psf (d)              $35.40     $164.60     $163.72     $215.60 
                tenants (e)               5           1           3           1 
Rowes Wharf     square feet (a)      75,662           0       5,280      68,275 
                % sq. ft (b)          22.0%        0.0%        1.5%       19.8% 
                annual rent (c)   3,006,549           0     116,096   2,457,900 
                psf (d)              $39.74       $0.00      $21.99      $36.00 
                tenants (e)               2           0           1           1 
150 Federal (f) square feet (a)     183,239           0           0     186,437 
                % sq. ft (b)          34.6%        0.0%        0.0%       35.2% 
                annual rent (c)   5,186,658           0           0   7,317,652 
                psf (d)              $28.31       $0.00       $0.00      $39.25 
                tenants (e)               2           0           0           1 
Russia Wharf    square feet (a)      11,725       5,782       1,835      30,773 
                % sq. ft (b)           3.8%        1.9%        0.6%        9.9% 
                annual rent (c)     159,265     107,372      26,983     584,643 
                psf (d)              $13.58      $18.57      $14.70      $19.00 
                tenants (e)               2           1           1           1 
75 Federal      square feet (a)           0      22,630           0           0 
                % sq. ft (b)           0.0%        8.9%        0.0%        0.0% 
                annual rent (c)           0     636,140           0           0 
                psf (d)               $0.00      $28.11       $0.00       $0.00 
                tenants (e)               0           2           0           0 
101 Federal     square feet (a)      19,310           0      77,794      64,081 
                % sq. ft (b)           3.4%        0.0%       13.9%       11.4% 
                annual rent (c)     502,060           0   2,151,782   2,477,225 
                psf (d)              $26.00       $0.00      $27.66      $38.66 
                tenants (e)               1           0           1           3 
Two Oliver      square feet (a)       8,266       6,155           0      68,205 
                % sq. ft (b)           3.1%        2.3%        0.0%       25.3% 
                annual rent (c)     162,783     108,143           0   2,138,619 
                psf (d)              $19.69      $17.57       $0.00      $31.36 
                tenants (e)               2           1           0           2 
                                 ----------- ----------- ----------- -----------
Total 
  Properties    square feet (a)     513,007     171,941     134,147     685,647 
                % sq. ft (b)          12.7%        4.3%        3.3%       17.0% 
                annual rent (c)  16,523,017   4,925,273   4,064,996  22,729,697 
                psf (d)              $32.21      $28.65      $30.30      $33.15 
                tenants (e)              21           8          11          18 

(a) Total area in square feet covered by such leases 

(b) Percentage of total square feet represented by such leases 

(c) Annualized expiring base rental income represented by such leases in the 
    year of expiration plus 1996 tenant payments on account of real estate 
    tax and operating expense escalations, except leases with CPI increases 
    in lieu of expense recoveries. 

(d) Calculated as annual rent divided by square feet 

(e) The number of tenants whose leases will expire 

(f) Lease expirations reflect retail tenants only for 1998. 

(g) Lease expirations reflect retail tenants only for 1997 through 2001 and 
2003 and beyond. 

                                     
                                      S-46
<PAGE>


<TABLE>
<CAPTION>
                                              Lease Expiration--Greater Boston Suburban Office Market 
                                            ----------------------------------------------------------- 
Property                                       1997        1998        1999        2000         2001 
- --------------------------                  ----------- ----------- ----------- ----------- ----------- 
<S>                        <C>                <C>         <C>         <C>         <C>         <C>
65 William Street          square feet (a)       2,607       1,103       3,416       4,326       8,603 
Building One               % sq. ft (b)           8.8%        3.7%       11.6%       14.7%       29.2% 
                           annual rent (c)      67,625      25,204      84,712     121,140     221,601 
                           psf (d)              $25.94      $22.85      $24.80      $28.00      $25.76 
                           tenants (e)               4           1           2           2           3 
60 William Street          square feet (a)           0       6,932       2,348      23,715       9,189 
Building Two               % sq. ft (b)           0.0%       13.1%        4.4%       44.7%       17.3% 
                           annual rent (c)           0     163,932      54,802     530,003     247,242 
                           psf (d)               $0.00      $23.65      $23.34      $22.35      $26.91 
                           tenants (e)               0           2           1           3           3 
55 William Street          square feet (a)      18,020      10,413       2,394           0       7,857 
Building Three             % sq. ft (b)          32.7%       18.9%        4.3%        0.0%       14.3% 
                           annual rent (c)     433,430     242,077      62,163           0     215,446 
                           psf (d)              $24.05      $23.25      $25.97       $0.00      $27.42 
                           tenants (e)               4           2           2           0           2 
40 William Street          square feet (a)      29,453           0       2,453           0      10,529 
Building Four              % sq. ft (b)          39.7%        0.0%        3.3%        0.0%       14.2% 
                           annual rent (c)     697,434           0      67,482           0     273,769 
                           psf (d)              $23.68       $0.00      $27.51       $0.00      $26.00 
                           tenants (e)               5           0           1           0           2 
20 William Street          square feet (a)      17,517      31,500       8,414      32,647      10,723 
Building Five              % sq. ft (b)          13.6%       24.4%        6.5%       25.3%        8.3% 
                           annual rent (c)     405,266     767,176     196,237     842,870     304,551 
                           psf (d)              $23.14      $24.35      $23.32      $25.82      $28.40 
                           tenants (e)               8          12           3           8           4 
45 William Street          square feet (a)       2,353           0           0           0           0 
Building Six               % sq. ft (b)           1.5%        0.0%        0.0%        0.0%        0.0% 
                           annual rent (c)      47,391           0           0           0           0 
                           psf (d)              $20.14       $0.00       $0.00       $0.00       $0.00 
                           tenants (e)               1           0           0           0           0 
80 William Street          square feet (a)           0           0           0           0           0 
Building Seven             % sq. ft (b)           0.0%        0.0%        0.0%        0.0%        0.0% 
                           annual rent (c)           0           0           0           0           0 
                           psf (d)               $0.00       $0.00       $0.00       $0.00       $0.00 
                           tenants (e)               0           0           0           0           0 
100 William Street         square feet (a)           0           0           0           0           0 
Building Eight             % sq. ft (b)           0.0%        0.0%        0.0%        0.0%        0.0% 
                           annual rent (c)           0           0           0           0           0 
                           psf (d)               $0.00       $0.00       $0.00       $0.00       $0.00 
                           tenants (e)               0           0           0           0           0 
New England                square feet (a)     311,360     151,336     104,093     119,364      96,996 
Executive Park             % sq. ft (b)          38.1%       18.5%       12.7%       14.6%       11.9% 
                           annual rent (c)   5,857,644   2,998,383   2,136,520   2,489,371   1,871,803 
                           psf (d)              $18.81      $19.81      $20.53      $20.86      $19.30 
                           tenants (e)              26          20          12          14          17 
Westwood                   square feet (a)      25,938       3,500      24,203      10,075      33,841 
                           % sq. ft (b)          16.2%        2.2%       15.1%        6.3%       21.1% 
                           annual rent (c)     617,048      71,365     518,192     211,064     992,218 
                           psf (d)              $23.79      $20.39      $21.41      $20.95      $29.32 
                           tenants (e)               3           1           6           3           1 
Crosby                     square feet (a)           0           0      40,500           0           0 
                           % sq. ft (b)           0.0%        0.0%       12.1%        0.0%        0.0% 
                           annual rent (c)           0           0     362,475           0           0 
                           psf (d)               $0.00       $0.00       $8.95       $0.00       $0.00 
                           tenants (e)               0           0           1           0           0 
                                            ----------- ----------- ----------- ----------- ----------- 
Total Properties           square feet (a)     407,248     204,784     187,821     190,127     177,738 
                           % sq. ft (b)          20.9%       10.5%        9.6%        9.8%        9.1% 
                           annual rent (c)   8,125,838   4,268,136   3,482,584   4,194,448   4,126,630 
                           psf (d)              $19.95      $20.84      $18.54      $22.06      $23.22 
                           tenants (e)              51          38          28          30          32 
</TABLE>

<TABLE>

<CAPTION>
                                                                                  2005 & 
Property                                       2002        2003        2004       beyond 
- --------------------------                  ----------- ----------- ----------- ----------- 
<S>                        <C>                 <C>         <C>         <C>         <C>
65 William Street          square feet (a)       5,473           0           0         661 
Building One               % sq. ft (b)          18.6%        0.0%        0.0%        2.2% 
                           annual rent (c)     135,362           0           0      16,856 
                           psf (d)              $24.73       $0.00       $0.00      $25.50 
                           tenants (e)               3           0           0           1 
60 William Street          square feet (a)           0      11,525           0           0 
Building Two               % sq. ft (b)           0.0%       21.7%        0.0%        0.0% 
                           annual rent (c)           0     287,816           0           0 
                           psf (d)               $0.00      $24.97       $0.00       $0.00 
                           tenants (e)               0           1           0           0 
55 William Street          square feet (a)           0           0      12,470           0 
Building Three             % sq. ft (b)           0.0%        0.0%       22.6%        0.0% 
                           annual rent (c)           0           0     310,503           0 
                           psf (d)               $0.00       $0.00      $24.90       $0.00 
                           tenants (e)               0           0           1           0 
40 William Street          square feet (a)      31,125           0           0           0 
Building Four              % sq. ft (b)          42.0%        0.0%        0.0%        0.0% 
                           annual rent (c)     853,866           0           0           0 
                           psf (d)              $27.43       $0.00       $0.00       $0.00 
                           tenants (e)               3           0           0           0 
20 William Street          square feet (a)      29,016           0           0           0 
Building Five              % sq. ft (b)          22.5%        0.0%        0.0%        0.0% 
                           annual rent (c)     777,341           0           0           0 
                           psf (d)              $26.79       $0.00       $0.00       $0.00 
                           tenants (e)               4           0           0           0 
45 William Street          square feet (a)      10,847      15,001      21,700     106,909 
Building Six               % sq. ft (b)           7.0%        9.6%       13.7%       67.5% 
                           annual rent (c)     303,933     397,527     540,330   2,802,344 
                           psf (d)              $28.02      $26.50      $24.90      $26.21 
                           tenants (e)               1           1           1           2 
80 William Street          square feet (a)           0           0           0      71,324 
Building Seven             % sq. ft (b)           0.0%        0.0%        0.0%      100.0% 
                           annual rent (c)           0           0           0   2,241,713 
                           psf (d)               $0.00       $0.00       $0.00      $31.43 
                           tenants (e)               0           0           0           1 
100 William Street         square feet (a)           0           0           0      62,952 
Building Eight             % sq. ft (b)           0.0%        0.0%        0.0%      100.0% 
                           annual rent (c)           0           0           0   1,794,132 
                           psf (d)               $0.00       $0.00       $0.00      $28.50 
                           tenants (e)               0           0           0           1 
New England                square feet (a)       1,279      17,931         258           0 
Executive Park             % sq. ft (b)           0.2%        2.2%        0.0%        0.0% 
                           annual rent (c)      29,417     379,176       8,772           0 
                           psf (d)              $23.00      $21.15      $34.00       $0.00 
                           tenants (e)               1           1           1           0 
Westwood                   square feet (a)           0           0      62,972           0 
                           % sq. ft (b)           0.0%        0.0%       39.3%        0.0% 
                           annual rent (c)           0           0   1,234,251           0 
                           psf (d)               $0.00       $0.00      $19.60       $0.00 
                           tenants (e)               0           0           1           0 
Crosby                     square feet (a)           0           0           0     255,914 
                           % sq. ft (b)           0.0%        0.0%        0.0%       76.2% 
                           annual rent (c)           0           0           0   4,238,553 
                           psf (d)               $0.00       $0.00       $0.00      $16.56 
                           tenants (e)               0           0           0           3 
                                            ----------- ----------- ----------- ----------- 
Total Properties           square feet (a)      77,740      44,457      97,400     497,760 
                           % sq. ft (b)           4.0%        2.3%        5.0%       25.6% 
                           annual rent (c)   2,099,918   1,064,518   2,093,856  11,093,598 
                           psf (d)              $27.01      $23.94      $21.50      $22.29 
                           tenants (e)              12           3           4           8 
</TABLE>


(a) Total area in square feet covered by such leases 

(b) Percentage of total square feet represented by such leases 

(c) Annualized expiring base rental income represented by such leases plus 
    1996 tenant payments on account of real estate tax and operating expense 
    escalations, except leases with CPI increases in lieu of expense 
    recoveries. 

(d) Calculated as annual rent divided by square feet 

(e) The number of tenants whose leases will expire 

                                     

                                      S-47
<PAGE>



<TABLE>
<CAPTION>
                                          Lease Expiration--Cambridge Office Market 
                                 ----------------------------------------------------------- 
Property                            1997        1998        1999        2000        2001 
- ---------------                  ----------- ----------- ----------- ----------- ----------- 
<S>             <C>                 <C>        <C>         <C>          <C>       <C>
One Canal Park  square feet (a)         0        3,499      1,411           0        87,244 
                % sq. ft (b)         0.0%         3.5%       1.4%        0.0%         87.0% 
                annual rent (c)         0      127,832     31,606           0     2,034,760 
                psf (d)             $0.00       $36.53     $22.40       $0.00        $23.32 
                tenants (e)             0            1          1           0             2 
Ten Canal Park  square feet (a)         0            0          0           0             0 
                % sq. ft (b)         0.0%         0.0%       0.0%        0.0%          0.0% 
                annual rent (c)         0            0          0           0             0 
                psf (d)             $0.00        $0.00      $0.00       $0.00         $0.00 
                tenants (e)             0            0          0           0             0 
245 First 
  Street        square feet (a)         0            0          0       6,320       228,720 
                % sq. ft (b)         0.0%         0.0%       0.0%        2.4%         87.0% 
                annual rent (c)         0            0          0      83,269     6,130,514 
                psf (d)             $0.00        $0.00      $0.00      $13.18        $26.80 
                tenants (e)             0            0          0           1             2 
                                 ----------- ----------- ----------- ----------- ----------- 
Total 
  Properties    square feet             0        3,499      1,411       6,320       315,964 
                % sq. ft             0.0%         0.7%       0.3%        1.3%         66.6% 
                Annual rent             0      127,832     31,606      83,269     8,165,274 
                psf (d)             $0.00       $36.53     $22.40      $13.18        $25.84 
                Tenants                 0            1          1           1             4 
</TABLE>

<TABLE>
<CAPTION>
                                                                       2005 & 
Property                            2002        2003        2004       beyond 
- ---------------                  ----------- ----------- ----------- ----------- 
<S>             <C>               <C>          <C>          <C>         <C>
One Canal Park  square feet (a)       5,758          0          0           0 
                % sq. ft (b)           5.7%       0.0%       0.0%        0.0% 
                annual rent (c)     172,740          0          0           0 
                psf (d)              $30.00      $0.00      $0.00       $0.00 
                tenants (e)               1          0          0           0 
Ten Canal Park  square feet (a)     101,909          0          0           0 
                % sq. ft (b)          38.7%       0.0%       0.0%        0.0% 
                annual rent (c)   2,308,239          0          0           0 
                psf (d)              $22.65      $0.00      $0.00       $0.00 
                tenants (e)               1          0          0           0 
245 First 
  Street        square feet (a)           0     28,000          0           0 
                % sq. ft (b)           0.0%      10.6%       0.0%        0.0% 
                annual rent (c)           0    709,712          0           0 
                psf (d)               $0.00     $25.35      $0.00       $0.00 
                tenants (e)               0          1          0           0 
                                 ----------- ----------- ----------- ----------- 
Total 
  Properties    square feet         107,667     28,000          0           0 
                % sq. ft              22.7%       5.9%       0.0%        0.0% 
                Annual rent       2,480,979    709,712          0           0 
                psf (d)              $23.04     $25.35      $0.00       $0.00 
                Tenants                   2          1          0           0 
</TABLE>


(a) Total area in square feet covered by such leases 

(b) Percentage of total square feet represented by such leases 

(c) Annualized base rental income represented by such leases in the year of 
    expiration plus 1996 tenant payments on account of real estate tax and 
    operating expense escalations, except leases with CPI increases in lieu 
    of expense recoveries. 

(d) Calculated as annual rent divided by square feet 

(e) The number of tenants whose leases will expire 

                                     

                                      S-48
<PAGE>


<TABLE>

<CAPTION>
                                               Lease Expiration--Central Perimeter Atlanta Office Market 
                                            ---------------------------------------------------------------- 
Property                                        1997         1998         1999         2000         2001 
- --------------------------                  ------------ ------------ ------------ ------------ ------------ 
<S>                        <C>               <C>          <C>          <C>          <C>          <C>
North Terraces             square feet (a)      38,343       11,825       83,535      178,212      131,275 
                           % sq. ft. (b)          7.8%         2.4%        16.9%        36.1%        26.6% 
                           annual rent (c      780,688      277,749    1,658,281    3,907,185    3,370,263 
                           psf (d)              $20.36       $23.49       $19.85       $21.92       $25.67 
                           tenants (e)               9            5            9           12           12 
South Terraces             square feet (a)     157,987       93,378       96,863       42,798        8,301 
                           % sq. ft. (b)         31.9%        18.9%        19.6%         8.7%         1.7% 
                           annual rent (c)   3,600,717    1,780,470    1,970,551      980,749      217,403 
                           psf (d)              $22.79       $19.07       $20.34       $22.92       $26.19 
                           tenants (e)              19           21           20            2            3 
8-16 Perimeter Center      square feet (a)      18,484        1,441        6,844        5,169       26,857 
                           % sq. ft. (b)         28.4%         2.2%        10.5%         8.0%        41.3% 
                           annual rent (c)     259,916       15,592      112,333       92,473      414,941 
                           psf (d)              $14.06       $10.82       $16.41       $17.89       $15.45 
                           tenants (e)               8            2            4            1            5 
20-26 Perimeter Center     square feet (a)      12,420       18,792       11,888       21,059        1,236 
                           % sq. ft. (b)         17.8%        27.0%        17.0%        30.2%         1.8% 
                           annual rent (c)     167,468      264,081      193,239      351,994       24,596 
                           psf (d)              $13.48       $14.05       $16.25       $16.71       $19.90 
                           tenants (e)               7            4            5            1            1 
28-32 Perimeter Center     square feet (a)       3,788       87,871        4,888        4,152            0 
                           % sq. ft. (b)          3.6%        83.6%         4.7%         4.0%         0.0% 
                           annual rent (c)      49,883    1,230,390       68,535       67,300            0 
                           psf (d)              $13.17       $14.00       $14.02       $16.21        $0.00 
                           tenants (e)               3            5            4            2            0 
41 Perimeter Center        square feet (a)       1,876       32,308       33,520       13,463       10,826 
                           % sq. ft. (b)          2.0%        35.1%        36.4%        14.6%        11.8% 
                           annual rent (c)       7,035      500,977      546,941      237,377      192,330 
                           psf (d)               $3.75       $15.51       $16.32       $17.63       $17.77 
                           tenants (e)               1            2            5            2            1 
47 Perimeter Center        square feet (a)       2,756       14,227       14,871       32,710        5,062 
                           % sq. ft. (b)          3.0%        15.5%        16.2%        35.5%         5.5% 
                           annual rent (c)      51,592      216,426      227,221      544,263      101,467 
                           psf (d)              $18.72       $15.21       $15.28       $16.64       $20.04 
                           tenants (e)               1            5            2            5            2 
50 Perimeter Center        square feet (a)           0        6,300            0            0            0 
                           % sq. ft. (b)          0.0%       100.0%         0.0%         0.0%         0.0% 
                           annual rent (c)           0       61,677            0            0            0 
                           psf (d)               $0.00        $9.79        $0.00        $0.00        $0.00 
                           tenants (e)               0            1            0            0            0 
53 Perimeter Center        square feet (a)      44,064            0       20,446            0       17,035 
                           % sq. ft. (b)         48.7%         0.0%        22.6%         0.0%        18.8% 
                           annual rent (c)     730,292            0      321,531            0      335,188 
                           psf (d)              $16.57        $0.00       $15.73        $0.00       $19.68 
                           tenants (e)               3            0            4            0            3 
56 Perimeter Center        square feet (a)       4,547            0       31,874        5,742       28,412 
                           % sq. ft. (b)          4.9%         0.0%        34.0%         6.1%        30.3% 
                           annual rent (c)      72,752            0      446,236      117,768      483,004 
                           psf (d)              $16.00        $0.00       $14.00       $20.51       $17.00 
                           tenants (e)               1            0            1            1            1 
66 Perimeter Center        square feet (a)           0            0            0            0      183,037 
                           % sq. ft. (b)          0.0%         0.0%         0.0%         0.0%       100.0% 
                           annual rent (c)           0            0            0            0    1,636,351 
                           psf (d)               $0.00        $0.00        $0.00        $0.00        $8.94 
                           tenants (e)               0            0            0            0            1 
64 Perimeter Center        square feet (a)           0            0            0            0            0 
                           % sq. ft. (b)          0.0%         0.0%         0.0%         0.0%         0.0% 
                           annual rent (c)           0            0            0            0            0 
                           psf (d)               $0.00        $0.00        $0.00        $0.00        $0.00 
                           tenants (e)               0            0            0            0            0 
70-76 Perimeter Center     square feet (a)      11,960        1,830       16,423       17,738       10,251 
                           % sq. ft. (b)         19.3%         3.0%        26.5%        28.6%        16.6% 
                           annual rent (c)     184,181       28,981      304,919      330,017      180,539 
                           psf (d)              $15.40       $15.84       $18.57       $18.61       $17.61 
                           tenants (e)               5            2            2            2            3 
125 Perimeter Center (f)   square feet (a)           0            0            0            0            0 
                           % sq. ft. (b)          0.0%         0.0%         0.0%         0.0%         0.0% 
                           annual rent (c)           0            0            0            0            0 
                           psf (d)               $0.00        $0.00        $0.00        $0.00        $0.00 
                           tenants (e)               0            0            0            0            0 
</TABLE>



<TABLE>
<CAPTION>
                                                                                  2005 & 
Property                                       2002        2003        2004       beyond 
- --------------------------                  ----------- ----------- ----------- ----------- 
<S>                        <C>              <C>           <C>          <C>           <C>
North Terraces             square feet (a)      24,400          0           0        2,718 
                           % sq. ft. (b)          4.9%       0.0%        0.0%         0.6% 
                           annual rent (c      598,246          0           0            0 
                           psf (d)              $24.52      $0.00       $0.00        $0.00 
                           tenants (e)               3          0           0            1 
South Terraces             square feet (a)      70,497      1,568           0            0 
                           % sq. ft. (b)         14.3%       0.3%        0.0%         0.0% 
                           annual rent (c)   1,792,656     40,298           0            0 
                           psf (d)              $25.43     $25.70       $0.00        $0.00 
                           tenants (e)               2          1           0            0 
8-16 Perimeter Center      square feet (a)           0          0           0            0 
                           % sq. ft. (b)          0.0%       0.0%        0.0%         0.0% 
                           annual rent (c)           0          0           0            0 
                           psf (d)               $0.00      $0.00       $0.00        $0.00 
                           tenants (e)               0          0           0            0 
20-26 Perimeter Center     square feet (a)           0          0           0            0 
                           % sq. ft. (b)          0.0%       0.0%        0.0%         0.0% 
                           annual rent (c)           0          0           0            0 
                           psf (d)               $0.00      $0.00       $0.00        $0.00 
                           tenants (e)               0          0           0            0 
28-32 Perimeter Center     square feet (a)           0          0           0            0 
                           % sq. ft. (b)          0.0%       0.0%        0.0%         0.0% 
                           annual rent (c)           0          0           0            0 
                           psf (d)               $0.00      $0.00       $0.00        $0.00 
                           tenants (e)               0          0           0            0 
41 Perimeter Center        square feet (a)           0          0           0            0 
                           % sq. ft. (b)          0.0%       0.0%        0.0%         0.0% 
                           annual rent (c)           0          0           0            0 
                           psf (d)               $0.00      $0.00       $0.00        $0.00 
                           tenants (e)               0          0           0            0 
47 Perimeter Center        square feet (a)       1,350     12,348           0            0 
                           % sq. ft. (b)          1.5%      13.4%        0.0%         0.0% 
                           annual rent (c)      20,912    240,873           0            0 
                           psf (d)              $15.49     $19.51       $0.00        $0.00 
                           tenants (e)               1          1           0            0 
50 Perimeter Center        square feet (a)           0          0           0            0 
                           % sq. ft. (b)          0.0%       0.0%        0.0%         0.0% 
                           annual rent (c)           0          0           0            0 
                           psf (d)               $0.00      $0.00       $0.00        $0.00 
                           tenants (e)               0          0           0            0 
53 Perimeter Center        square feet (a)           0          0           0            0 
                           % sq. ft. (b)          0.0%       0.0%        0.0%         0.0% 
                           annual rent (c)           0          0           0            0 
                           psf (d)               $0.00      $0.00       $0.00        $0.00 
                           tenants (e)               0          0           0            0 
56 Perimeter Center        square feet (a)       7,886          0           0            0 
                           % sq. ft. (b)          8.4%       0.0%        0.0%         0.0% 
                           annual rent (c)     147,547          0           0            0 
                           psf (d)              $18.71      $0.00       $0.00        $0.00 
                           tenants (e)               0          0           0            0 
66 Perimeter Center        square feet (a)           0          0           0            0 
                           % sq. ft. (b)          0.0%       0.0%        0.0%         0.0% 
                           annual rent (c)           0          0           0            0 
                           psf (d)               $0.00      $0.00       $0.00        $0.00 
                           tenants (e)               0          0           0            0 
64 Perimeter Center        square feet (a)           0          0           0      372,498 
                           % sq. ft. (b)          0.0%       0.0%        0.0%       100.0% 
                           annual rent (c)           0          0           0    9,189,526 
                           psf (d)               $0.00      $0.00       $0.00       $24.67 
                           tenants (e)               0          0           0            1 
70-76 Perimeter Center     square feet (a)       1,473          0           0            0 
                           % sq. ft. (b)          2.4%       0.0%        0.0%         0.0% 
                           annual rent (c)      26,705          0           0            0 
                           psf (d)              $18.13      $0.00       $0.00        $0.00 
                           tenants (e)               1          0           0            0 
125 Perimeter Center (f)   square feet (a)           0          0     223,059            0 
                           % sq. ft. (b)          0.0%       0.0%      100.0%         0.0% 
                           annual rent (c)           0          0     981,460            0 
                           psf (d)               $0.00      $0.00       $4.40        $0.00 
                           tenants (e)           0           0           1               0 

</TABLE>

                           

                                      S-49

<PAGE> 

<TABLE>

<CAPTION>
                                          Lease Expiration--Arlington County, Virginia Office Market 
                                        -------------------------------------------------------------- 
Property                                    1997              1998        1999        2000         2001 
- -----------------                       -----------    ----------- ----------- ----------- ----------- 
<S>                                        <C>           <C>         <C>            <C>       <C>    
219 Perimeter 
Center            square feet (a)         3,886            70,379      28,863       3,375       15,202 
                  % sq. ft. (b)             3.0%             54.9%       22.5%        2.6%        11.9% 
                  annual rent (c)         72,163         1,205,983     479,619      50,558      292,611 
                  psf (d)                 $18.57            $17.14      $16.62      $14.98       $19.25 
                  tenants (e)                  1                 2           1           1            1 
223 Perimeter 
Center            square feet (a)             0                 0           0           0      127,823 
                  % sq. ft. (b)             0.0%              0.0%        0.0%        0.0%       100.0% 
                  annual rent (c)              0                 0           0           0    2,473,375 
                  psf (d)                  $0.00             $0.00       $0.00       $0.00       $19.35 
                  tenants (e)                  0                 0           0           0            1 
245 Perimeter 
Center            square feet (a)             0                 0           0           0      229,217 
                  % sq. ft. (b)             0.0%              0.0%        0.0%        0.0%       100.0% 
                  annual rent (c)              0                 0           0           0    4,254,268 
                  psf (d)                  $0.00             $0.00       $0.00       $0.00       $18.56 
                  tenants (e)                  0                 0           0           0            1 
301 Perimeter 
Center            square feet (a)             0                 0     151,416           0            0 
                  % sq. ft. (b)             0.0%              0.0%      100.0%        0.0%         0.0% 
                  annual rent (c)              0                 0   2,743,658           0            0 
                  psf (d)                  $0.00             $0.00      $18.12       $0.00        $0.00 
                  tenants (e)                  0                 0           1           0            0 
303 Perimeter 
Center            square feet (a)             0                 0     162,256           0            0 
                  % sq. ft. (b)             0.0%              0.0%      100.0%        0.0%         0.0% 
                  annual rent (c)              0                 0   3,674,913           0            0 
                  psf (d)                  $0.00             $0.00      $22.65       $0.00        $0.00 
                  tenants (e)                  0                 0           2           0            0 
Park Place
Shopping Ctr.     square feet (a)          2,489             5,955      16,920      15,101        9,591 
                  % sq. ft. (b)             4.0%              9.6%       27.4%       24.4%        15.5% 
                  annual rent (c)         47,241           107,893     290,930     312,728      204,083 
                  psf (d)                 $18.98            $18.12      $17.19      $20.71       $21.28 
                  tenants (e)                  1                 4           4           4            2 
                                        --------       ----------- ----------- ----------- ----------- 
Total Properties  square feet (a)        302,600           344,306     680,607     339,519      804,125 
                  % sq. ft. (b)             9.2%             10.4%       20.6%       10.3%        24.3% 
                  annual rent (c)       6,023,92         5,690,219  13,038,907   6,992,412   14,180,418 
                  psf (d)                 $19.91            $16.53      $19.16      $20.60       $17.63 
                  tenants (e)                 59                53          64          33           37 
</TABLE>                                

<TABLE>
<CAPTION>
                                                                       2005 & 
Property                            2002        2003        2004       beyond 
- ---------------                  ----------- ----------- ----------- ----------
<S>             <C>              <C>         <C>         <C>         <C>
219 Perimeter 
  Center        square feet (a)           0          0           0            0 
                % sq. ft. (b)          0.0%       0.0%        0.0%         0.0% 
                annual rent (c)           0          0           0            0 
                psf (d)               $0.00      $0.00       $0.00        $0.00 
                tenants (e)               0          0           0            0 
223 Perimeter 
  Center        square feet (a)           0          0           0            0 
                % sq. ft. (b)          0.0%       0.0%        0.0%         0.0% 
                annual rent (c)           0          0           0            0 
                psf (d)               $0.00      $0.00       $0.00        $0.00 
                tenants (e)               0          0           0            0 
245 Perimeter 
  Center        square feet (a)           0          0           0            0 
                % sq. ft. (b)          0.0%       0.0%        0.0%         0.0% 
                annual rent (c)           0          0           0            0 
                psf (d)               $0.00      $0.00       $0.00        $0.00 
                tenants (e)               0          0           0            0 
301 Perimeter 
  Center        square feet (a)           0          0           0            0 
                % sq. ft. (b)          0.0%       0.0%        0.0%         0.0% 
                annual rent (c)           0          0           0            0 
                psf (d)               $0.00      $0.00       $0.00        $0.00 
                tenants (e)               0          0           0            0 
303 Perimeter 
  Center        square feet (a)           0          0           0            0 
                % sq. ft. (b)          0.0%       0.0%        0.0%         0.0% 
                annual rent (c)           0          0           0            0 
                psf (d)               $0.00      $0.00       $0.00        $0.00 
                tenants (e)               0          0           0            0 
Park Place 
  Shopping Ctr. square feet (a)           0          0           0       11,774 
                % sq. ft. (b)          0.0%       0.0%        0.0%        19.0% 
                annual rent (c)           0          0           0      239,746 
                psf (d)               $0.00      $0.00       $0.00       $20.36 
                tenants (e)               0          0           0            2 
                                 ----------- ----------- ----------- ----------
Total 
  Properties    square feet (a)     105,606     13,916     223,059      386,990 
                % sq. ft. (b)          3.2%       0.4%        6.8%        11.7% 
                annual rent (c)   2,586,065    281,171     981,460    9,429,272 
                psf (d)              $24.49     $20.20       $4.40       $24.37 
                tenants (e)               7          2           1            4 
</TABLE>


(a) Total area in square feet covered by such leases 

(b) Percentage of total square feet represented by such leases 

(c) Annualized expiring base rental income represented by such leases in the 
    year of expiration plus 1996 tenant payments on account of real estate 
    and operating escalations, except leases with CPI increases in lieu of 
    expense recoveries 

(d) Calculated as annual rent divided by square feet 

(e) The number of tenants whose leases will expire 

(f) 125 Perimeter Center is reflected as a 2004 expiration; although the 
    lease expires in 1999, the tenant has an option to extend for five years 
    in 1999 at a rental rate that is significantly below market. 

                                     

                                      S-50
<PAGE>

<TABLE>

<CAPTION>
                                 Lease Expiration--Arlington County, Virginia Office Market 
                                 ----------------------------------------------------------- 
Property                            1997        1998        1999        2000        2001 
- ---------------                  ----------- ----------- ----------- ----------- ----------- 
<S>             <C>              <C>           <C>         <C>        <C>         <C>
1300 North 17th 
  Street        square feet (a)      13,473     21,284       5,672       97,639      76,137 
                % sq. ft (b)           3.6%       5.7%        1.5%        26.2%       20.4% 
                annual rent (c)     287,032    563,333     133,333    2,705,217   1,919,369 
                psf (d)              $21.30     $26.47      $23.51       $27.71      $25.21 
                tenants (e)               2          4           2            6           4 
1616 North Ft. 
  Myer Drive    square feet (a)       2,476      4,626           0       40,105      87,270 
                % sq. ft (b)           0.8%       1.6%        0.0%        13.7%       29.8% 
                annual rent (c)      57,750     93,123           0    1,019,706   2,320,342 
                psf (d)              $23.32     $20.13       $0.00       $25.43      $26.59 
                tenants (e)               2          1           0            4           3 
Polk and Taylor 
  Buildings     square feet (a)     890,000          0           0            0           0 
                % sq. ft (b)         100.0%       0.0%        0.0%         0.0%        0.0% 
                annual rent (c)  17,758,558          0           0            0           0 
                psf (d)              $19.95      $0.00       $0.00        $0.00       $0.00 
                tenants (e)               6          0           0            0           0 
                                 ----------- ----------- ----------- ----------- ----------- 
Total 
  Properties    square feet (a)     905,949     25,910       5,672      137,744     163,407 
                % sq. ft (b)          58.2%       1.7%        0.4%         8.9%       10.5% 
                annual rent (c)  18,103,340    656,456     133,333    3,724,922   4,239,711 
                psf (d)              $19.98     $25.34      $23.51       $27.04      $25.95 
                tenants (e)              10          5           2           10           7 
</TABLE>

<TABLE>
<CAPTION>
                                                                       2005 & 
Property                            2002        2003        2004       beyond 
- ---------------                  ----------- ----------- ----------- ----------- 
<S>             <C>               <C>         <C>          <C>       <C>
1300 North 17th 
  Street        square feet (a)      52,187      40,252     22,470       33,192 
                % sq. ft (b)          14.0%       10.8%       6.0%         8.9% 
                annual rent (c)   1,107,526   1,090,746    656,940    1,011,342 
                psf (d)              $21.22      $27.10     $29.24       $30.47 
                tenants (e)               4           2          1            2 
1616 North Ft. 
  Myer Drive    square feet (a)      12,208      43,882      6,324       93,285 
                % sq. ft (b)           4.2%       15.0%       2.2%        31.9% 
                annual rent (c)     324,352   1,108,034    166,950    2,405,155 
                psf (d)              $26.57      $25.25     $26.40       $25.78 
                tenants (e)               1           2          1            2 
Polk and Taylor 
  Buildings     square feet (a)           0           0          0            0 
                % sq. ft (b)           0.0%        0.0%       0.0%         0.0% 
                annual rent (c)           0           0          0            0 
                psf (d)               $0.00       $0.00      $0.00        $0.00 
                tenants (e)               0           0          0            0 
                                 ----------- ----------- ----------- ----------- 
Total 
  Properties    square feet (a)      64,395      84,134     28,794      126,477 
                % sq. ft (b)           4.1%        5.4%       1.9%         8.1% 
                annual rent (c)   1,431,878   2,198,780    823,890    3,416,497 
                psf (d)              $22.24      $26.13     $28.61       $27.01 
                tenants (e)               5           4          2            4 
</TABLE>


(a) Total area in square feet covered by such leases 

(b) Percentage of total square feet represented by such leases 

(c) Annualized expiring base rental income represented by such leases plus 
    1996 tenant payments on account of real estate tax and operating expense 
    escalations. 

(d) Calculated as annual rent divided by square feet 

(e) The number of tenants whose leases will expire 

                                     

                                      S-51
<PAGE>

<TABLE>

<CAPTION>
                                  Lease Expiration--Fairfax County, Virginia Office Market 
                                 ----------------------------------------------------------- 
Property                            1997        1998        1999        2000        2001 
- ---------------                  ----------- ----------- ----------- ----------- ----------- 
<S>             <C>                 <C>        <C>          <C>         <C>       <C>
E J Randolph    square feet (a)      2,576       3,223       1,801        8,091      59,082 
                % sq. ft (b)          1.6%        2.0%        1.1%         4.9%       35.9% 
                annual rent (c)     75,085      72,195      75,588      216,762   1,485,452 
                psf (d)             $29.15      $22.40      $41.97       $26.79      $25.14 
                tenants (e)              2           1           1            2           5 
John Marshall   square feet (a)          0           0           0            0       2,788 
                % sq. ft (b)          0.0%        0.0%        0.0%         0.0%        1.1% 
                annual rent (c)          0           0           0            0      97,218 
                psf (d)              $0.00       $0.00       $0.00        $0.00      $34.87 
                tenants (e)              0           0           0            0           1 
Northridge      square feet (a)          0           0           0      124,319           0 
                % sq. ft (b)          0.0%        0.0%        0.0%       100.0%        0.0% 
                annual rent (c)          0           0           0    3,237,267           0 
                psf (d)              $0.00       $0.00       $0.00       $26.04       $0.00 
                tenants (e)              0           0           0            1           0 
                                 ----------- ----------- ----------- ----------- ----------- 
Total 
  Properties    square feet (a)      2,576       3,223       1,801      132,410      61,870 
                % sq. ft (b)          0.5%        0.6%        0.3%        24.1%       11.2% 
                annual rent (c)     75,085      72,195      75,588    3,454,029   1,582,669 
                psf (d)             $29.15      $22.40      $41.97       $26.09      $25.58 
                tenants (e)              2           1           1            3           6 

Pending Acquisitions 
- --------------------
Centerpointe I 
  & II          square feet (a)     24,218      15,094      30,350       10,733       5,394 
                % sq. ft (b)          5.9%        3.7%        7.4%         2.6%        1.3% 
                annual rent (c)    507,420     290,761     621,740      222,189     109,282 
                psf (d)             $20.95      $19.26      $20.49       $20.70      $20.26 
                tenants (e)              3           4           3            2           1 
                                 ----------- ----------- ----------- ----------- ----------- 
Total 
  Properties 
  and 
  Pending 
  Acquisitions  square feet (a)     26,794      18,317      32,151      143,143      67,264 
                % sq. ft (b)          2.8%        1.9%        3.4%        14.9%        7.0% 
                annual rent (c)    582,505     362,956     697,328    3,676,218   1,691,952 
                psf (d)             $21.74      $19.82      $21.69       $25.68      $25.15 
                tenants (e)              5           5           4            5           7 
</TABLE>

<TABLE>
<CAPTION>
                                                                       2005 & 
Property                            2002        2003        2004       beyond 
- --------                        ----------- ----------- ----------- ----------- 
<S>             <C>                <C>         <C>        <C>        <C>
E J Randolph    square feet (a)     14,958          0        70,366           0 
                % sq. ft (b)          9.1%       0.0%         42.7%        0.0% 
                annual rent (c)    315,959          0     1,691,534           0 
                psf (d)             $21.12      $0.00        $24.04       $0.00 
                tenants (e)              2          0             3           0 
John Marshall   square feet (a)          0          0             0     258,576 
                % sq. ft (b)          0.0%       0.0%          0.0%       98.9% 
                annual rent (c)          0          0             0   6,660,918 
                psf (d)              $0.00      $0.00         $0.00      $25.76 
                tenants (e)              0          0             0           1 
Northridge      square feet (a)          0          0             0           0 
                % sq. ft (b)          0.0%       0.0%          0.0%        0.0% 
                annual rent (c)          0          0             0           0 
                psf (d)              $0.00      $0.00         $0.00       $0.00 
                tenants (e)              0          0             0           0 
                                 ----------- ----------- ----------- ----------- 
Total 
  Properties    square feet (a)     14,958          0        70,366     258,576 
                % sq. ft (b)          2.7%       0.0%         12.8%       47.0% 
                annual rent (c)    315,959          0     1,691,534   6,660,918 
                psf (d)             $21.12      $0.00        $24.04      $25.76 
                tenants (e)              2          0             3           1 
Pending Acquisitions 
 -------------------
Centerpointe I 
  & II          square feet (a)     27,159          0             0     294,648 
                % sq. ft (b)          6.7%       0.0%          0.0%       72.2% 
                annual rent (c)    551,185          0             0   6,338,370 
                psf (d)             $20.29      $0.00         $0.00      $21.51 
                tenants (e)              4          0             0           3 
                                 ----------- ----------- ----------- ----------- 
Total 
  Properties 
  and 
  Pending 
  Acquisitions  square feet (a)     42,117          0        70,366     553,224 
                % sq. ft (b)          4.4%       0.0%          7.3%       57.7% 
                annual rent (c)    867,143          0     1,691,534  12,999,287 
                psf (d)             $20.59      $0.00        $24.04      $23.50 
                tenants (e)              6          0             3           4 
</TABLE>


(a) Total area in square feet covered by such leases 

(b) Percentage of total square feet represented by such leases 

(c) Annualized expiring base rental income represented by such leases in the 
    year of expiration plus 1996 tenant payments on account of real estate 
    tax and operating expense escalations, except leases with CPI increases 
    in lieu of expense recoveries. 

(d) Calculated as annual rent divided by square feet 


(e) The number of tenants whose leases will expire 
<TABLE>
<CAPTION>
                                      Lease Expiration--Washington, D.C. Office Market 
                                 ----------------------------------------------------------- 
Property                            1997        1998        1999        2000        2001 
- ---------------                  ----------- ----------- ----------- ----------- ----------- 
<S>             <C>                <C>         <C>          <C>        <C>         <C>
1333 H Street   square feet (a)     11,020       4,045          0        8,835      2,945 
                % sq. ft (b)          4.6%        1.7%       0.0%         3.7%       1.2% 
                annual rent (c)    292,571     115,428          0      243,846     79,692 
                psf (d)             $26.55      $28.54      $0.00       $27.60     $27.06 
                tenants (e)              4           3          0            3          1 
</TABLE>
<TABLE>
<CAPTION>
                                                                       2005 & 
Property                            2002        2003        2004       beyond 
- ---------------                  ----------- ----------- ----------- ----------- 
<S>             <C>               <C>          <C>          <C>       <C>
1333 H Street   square feet (a)      57,041     14,708          0       108,536 
                % sq. ft (b)          23.9%       6.2%       0.0%         45.5% 
                annual rent (c)   1,744,884    461,684          0     3,660,672 
                psf (d)              $30.59     $31.39      $0.00        $33.73 
                tenants (e)               1          1          0             2 
</TABLE>


(a) Total area in square feet covered by such leases 

(b) Percentage of total square feet represented by such leases 


(c) Annualized expiring base rental income represented by such leases plus 
    1996 tenant payments on account of real estate tax & operating expense 
    escalations. 

(d) Annual rent (c) divided by square feet (a) 

(e) The number of tenants whose lease will expire 



                                     

                                      S-52
<PAGE>


<TABLE>

<CAPTION>
                                      Lease Expiration--Suburban Chicago Office Market 
                                 ----------------------------------------------------------- 
Property                            1997        1998        1999        2000        2001 
- ---------------                  ----------- ----------- ----------- ----------- ----------- 
<S>             <C>               <C>         <C>         <C>         <C>         <C>
AT&T Plaza      square feet (a)      12,860      39,525      29,539      79,574           0 
                % sq. ft (b)           5.7%       17.5%       13.1%       35.3%        0.0% 
                annual rent (c)     276,755     814,860     669,941   1,762,418           0 
                psf (d)              $21.52      $20.62      $22.68      $22.15       $0.00 
                tenants (e)               5           6           2           4           0 
Presidents 
  Plaza         square feet (a)      48,849      25,065      50,077      27,306      35,746 
                % sq. ft (b)           6.2%        3.2%        6.3%        3.5%        4.5% 
                annual rent (c)   1,002,924     564,901   1,217,406     577,395     858,056 
                psf (d)              $20.53      $22.54      $24.31      $21.15      $24.00 
                tenants (e)              10           8          11           8           5 
Tri State Int'l square feet (a)     123,561      19,966      60,002      24,018     113,026 
                % sq. ft (b)          22.5%        3.6%       10.9%        4.4%       20.6% 
                annual rent (c)   2,720,157     407,813   1,577,457     539,023   2,896,921 
                psf (d)              $22.01      $20.43      $26.29      $22.44      $25.63 
                tenants (e)               9           3           5           3          11 
                                 ----------- ----------- ----------- ----------- ----------- 
Total 
  Properties    square feet (a)     185,270      84,556     139,618     130,898     148,772 
                % sq. ft (b)          11.8%        5.4%        8.9%        8.4%        9.5% 
                annual rent (c)   3,999,836   1,787,574   3,464,805   2,878,835   3,754,977 
                psf (d)              $21.59      $21.14      $24.82      $21.99      $25.24 
                tenants (e)              24          17          18          15          16 
Pending 
  Acquisition 
- --------------- 
Westbrook 
  Corporate 
  Center        square feet (a)      66,228     106,823      97,347     256,406     204,350 
                % sq. ft. (b)          6.0%        9.7%        8.8%       23.2%       18.5% 
                annual rent (c)   1,747,948   2,757,545   2,765,629   8,023,751   5,558,367 
                psf (d)              $26.39      $25.81      $28.41      $31.29      $27.20 
                tenants (e)              12          14          15          19          18 
Total 
  Properties 
  and 
  Pending 
  Acquisition   square feet (a)     251,498     191,379     236,965     387,304     353,122 
                % sq. ft. (b)          9.4%        7.2%        8.9%       14.5%       13.2% 
                annual rent (c)   5,747,784   4,545,119   6,230,434  10,902,586   9,313,345 
                psf (d)              $22.85      $23.75      $26.29      $28.15      $26.37 
                tenants (e)              36          31          33          34          34 
</TABLE>

<TABLE>
<CAPTION>
                                                                       2005 & 
Property                            2002        2003        2004       beyond 
- ---------------                  ----------- ----------- ----------- ----------- 
<S>             <C>               <C>        <C>          <C>        <C>
AT&T Plaza      square feet (a)      12,288      38,249       8,165       2,521 
                % sq. ft (b)           5.5%       17.0%        3.6%        1.1% 
                annual rent (c)     282,240     994,404     197,014           0 
                psf (d)              $22.97      $26.00      $24.13       $0.00 
                tenants (e)               2           3           1           1 
Presidents 
  Plaza         square feet (a)      24,532      62,221      27,078     411,796 
                % sq. ft (b)           3.1%        7.9%        3.4%       52.1% 
                annual rent (c)     712,848   1,540,159     687,578  12,187,590 
                psf (d)              $29.06      $24.75      $25.39      $29.60 
                tenants (e)               2           3           1           8 
Tri State Int'l square feet (a)       9,928           0      27,491      26,578 
                % sq. ft (b)           1.8%        0.0%        5.0%        4.9% 
                annual rent (c)     225,003           0     716,965     736,211 
                psf (d)              $22.66       $0.00      $26.08      $27.70 
                tenants (e)               1           0           1           1 
                                 ----------- ----------- ----------- ----------- 
Total 
  Properties    square feet (a)      46,748     100,470      62,734     440,895 
                % sq. ft (b)           3.0%        6.4%        4.0%       28.2% 
                annual rent (c)   1,220,090   2,534,563   1,601,557  12,923,801 
                psf (d)              $26.10      $25.23      $25.53      $29.31 
                tenants (e)               5           6           3          10 
Pending 
  Acquisition 
- --------------- 
Westbrook 
  Corporate 
  Center        square feet (a)      88,927     101,787      12,275      60,314 
                % sq. ft. (b)          8.0%        9.2%        1.1%        5.5% 
                annual rent (c)   2,484,161   2,501,276     396,525   1,544,220 
                psf (d)              $27.93      $24.57      $32.30      $25.60 
                tenants (e)               6           5           2           8 
Total 
  Properties 
  and 
  Pending 
  Acquisition   square feet (a)     135,675     202,257      75,009     501,209 
                % sq. ft. (b)          5.1%        7.6%        2.8%       18.8% 
                annual rent (c)   3,704,251   5,035,839   1,998,081  14,468,021 
                psf (d)              $27.30      $24.90      $26.64      $28.87 
                tenants (e)              11          11           5          18 
</TABLE>


(a) Total area in square feet covered by such leases 

(b) Percentage of total square feet represented by such leases 

(c) Annualized expiring base rental income represented by such leases plus 
    1996 tenant payments on account of real estate tax and operating expense 
    escalations. 

(d) Calculated as annual rent divided by square feet 

(e) The number of tenants whose leases will expire 

                                     

                                      S-53
<PAGE>

<TABLE>

<CAPTION>
                                    Lease Expiration--Suburban Philadelphia Office Market 
                                 ----------------------------------------------------------- 
Property                            1997        1998        1999        2000        2001 
- ---------------                  ----------- ----------- ----------- ----------- ----------- 
<S>             <C>                <C>         <C>         <C>       <C>           <C>
Westlakes 1     square feet (a)     24,502      18,164       16,098      13,839     23,552 
                % sq. ft (b)         17.9%       13.3%        11.8%       10.1%      17.2% 
                annual rent (c)    480,156     394,345      268,589     300,159    549,743 
                psf (d)             $19.60      $21.71       $16.68      $21.69     $23.34 
                tenants (e)              6           3            4           3          6 
Westlakes 2     square feet (a)      6,668       5,394        9,889      35,447          0 
                % sq. ft (b)          5.2%        4.2%         7.7%       27.5%       0.0% 
                annual rent (c)    142,228     111,604      213,278     798,851          0 
                psf (d)             $21.33      $20.69       $21.57      $22.54      $0.00 
                tenants (e)              1           2            2           2          0 
Westlakes 3     square feet (a)          0           0            0     118,737          0 
                % sq. ft (b)          0.0%        0.0%         0.0%      100.6%       0.0% 
                annual rent (c)          0           0            0   2,896,267          0 
                psf (d)              $0.00       $0.00        $0.00      $24.39      $0.00 
                tenants (e)              0           0            0           2          0 
Westlakes 5     square feet (a)          0           0       27,480      12,928      1,000 
                % sq. ft (b)          0.0%        0.0%        45.8%       21.5%       1.7% 
                annual rent (c)          0           0      677,163     303,717     23,350 
                psf (d)              $0.00       $0.00       $24.64      $23.49     $23.35 
                tenants (e)              0           0            1           2          1 
                                 ----------- ----------- ----------- ----------- ----------- 
Total 
  Properties    square feet (a)     31,170      23,558       53,467     180,951     24,552 
                % sq. ft (b)          7.0%        5.3%        12.0%       40.8%       5.5% 
                annual rent (c)    622,385     505,948    1,159,030   4,298,994    573,093 
                psf (d)             $19.97      $21.48       $21.68      $23.76     $23.34 
                tenants (e)              7           5            7           9          7 
</TABLE>

<TABLE>
<CAPTION>
                                                                       2005 & 
Property                            2002        2003        2004       beyond 
- ---------------                  ----------- ----------- ----------- ----------- 
<S>             <C>                <C>         <C>          <C>        <C>
Westlakes 1     square feet (a)     23,872            0         0       18,439 
                % sq. ft (b)         17.4%         0.0%      0.0%        13.5% 
                annual rent (c)    546,175            0         0      442,536 
                psf (d)             $22.88        $0.00     $0.00       $24.00 
                tenants (e)              1            0         0            1 
Westlakes 2     square feet (a)          0       44,846         0       22,413 
                % sq. ft (b)          0.0%        34.8%      0.0%        17.4% 
                annual rent (c)          0      990,717         0      423,896 
                psf (d)              $0.00       $22.09     $0.00       $18.91 
                tenants (e)              0            1         0            2 
Westlakes 3     square feet (a)          0            0         0            0 
                % sq. ft (b)          0.0%         0.0%      0.0%         0.0% 
                annual rent (c)          0            0         0            0 
                psf (d)              $0.00        $0.00     $0.00        $0.00 
                tenants (e)              0            0         0            0 
Westlakes 5     square feet (a)      3,700       11,711         0            0 
                % sq. ft (b)          6.2%        19.5%      0.0%         0.0% 
                annual rent (c)     88,800      324,790         0            0 
                psf (d)             $24.00       $27.73     $0.00        $0.00 
                tenants (e)              1            1         0            0 
                                 ----------- ----------- ----------- ----------- 
Total 
  Properties    square feet (a)     27,572       56,557         0       40,852 
                % sq. ft (b)          6.2%        12.7%      0.0%         9.2% 
                annual rent (c)    634,975    1,315,506         0      866,432 
                psf (d)             $23.03       $23.26     $0.00       $21.21 
                tenants (e)              2            2         0            3 
</TABLE>


(a) Total area in square feet covered by such leases 

(b) Percentage of total square feet represented by such leases 

(c) Annualized expiring base rental income represented by such leases in the 
    year of expiration plus 1996 tenant payments on account of real estate 
    tax and operating expense escalations, except leases with CPI increases 
    in lieu of expense recoveries. 

(d) Calculated as annual rent divided by square feet 

(e) The number of tenants whose leases will expire 

<TABLE>

<CAPTION>
                                      Lease Expiration--West Los Angeles Office Market 
                                 ----------------------------------------------------------- 
Property                            1997        1998        1999        2000        2001 
- --------                         ----------- ----------- ----------- ----------- ----------- 
<S>             <C>                <C>         <C>         <C>        <C>         <C>
10960 Wilshire  
  Boulevard     square feet (a)     23,922       3,030       9,126      162,021      20,761 
                % sq. ft (b)          4.4%        0.6%        1.7%        29.8%        3.8% 
                annual rent (c)    585,840      88,608     262,561    4,561,300     598,825 
                psf (d)             $24.49      $29.24      $28.77       $28.15      $28.84 
                tenants (e)              1           1           3           14           3 
Pending Acquisition 
- -------------------
10880 Wilshire 
  Boulevard     square feet (a)          0       7,167      22,814       49,900     119,702 
                % sq. ft (b)          0.0%        1.3%        4.3%         9.4%       22.5% 
                annual rent (c)          0     204,103     616,555    1,284,960   3,533,553 
                psf (d)              $0.00      $28.48      $27.03       $25.75      $29.52 
                tenants (e)              0           2           5           10          16 
                                 ----------- ----------- ----------- ----------- ----------- 
Total Property 
  and 
  Pending 
  Acquisition   square feet (a)     23,922      10,197      31,940      211,921     140,463 
                % sq. ft (b)          2.2%        0.9%        3.0%        19.7%       13.1% 
                annual rent (c)    585,840     292,711     879,116    5,846,260   4,132,377 
                psf (d)             $24.49      $28.71      $27.52       $27.59      $29.42 
                tenants (e)              1           3           8           24          19 
</TABLE>
<TABLE>
<CAPTION>
                                                                       2005 & 
Property                            2002        2003        2004       beyond 
- --------                         ----------- ----------- ----------- ----------- 
<S>             <C>              <C>         <C>         <C>         <C>
10960 Wilshire 
  Boulevard     square feet (a)      52,382      34,801      10,658     167,586 
                % sq. ft (b)           9.6%        6.4%        2.0%       30.8% 
                annual rent (c)   1,809,183   1,134,632     350,807   5,664,221 
                psf (d)              $34.54      $32.60      $32.91      $33.80 
                tenants (e)               3           3           1           4 
Pending Acquisition 
 ------------------
10880 Wilshire 
  Boulevard     square feet (a)     150,813           0      83,049      17,566 
                % sq. ft (b)          28.4%        0.0%       15.6%        3.3% 
                annual rent (c)   4,572,705           0   2,691,079     592,427 
                psf (d)              $30.32       $0.00      $32.40      $33.73 
                tenants (e)               7           0           2           1 
                                 ----------- ----------- ----------- ----------- 
Total Property 
  and 
  Pending 
  Acquisition   square feet (a)     203,195      34,801      93,707     185,152 
                % sq. ft (b)          18.9%        3.2%        8.7%       17.2% 
                annual rent (c)   6,381,888   1,134,632   3,041,886   6,256,648 
                psf (d)              $31.41      $32.60      $32.46      $33.79 
                tenants (e)              10           3           3           5 
</TABLE>


(a) Total area in square feet covered by such leases 

(b) Percentage of total square feet represented by such leases 

(c) Annualized expiring base rental income represented by such leases plus 
    1996 tenant payments on account of real estate tax and operating expense 
    escalations. 

(d) Annual rent (c) divided by square feet (a) 

(e) The number of tenants whose leases will expire 



                                      S-54
<PAGE>



<TABLE>

<CAPTION>
                                     Lease Expiration--Silicon Valley Office/R&D Market 
                                 ----------------------------------------------------------- 
Property                            1997        1998        1999        2000        2001 
- --------                         ----------- ----------- ----------- ----------- ----------- 
<S>             <C>               <C>          <C>         <C>        <C>         <C>
Lake Marriott   square feet (a)     60,548       9,465      24,548      138,302      40,320 
                % sq. ft (b)         15.1%        2.4%        6.1%        34.6%       10.1% 
                annual rent (c)    938,578     133,634     241,383    1,233,922     508,032 
                psf (d)             $15.50      $14.12       $9.83        $8,92      $12.60 
                tenants (e)              2           2           3            6           1 
Shoreline       square feet (a)          0           0           0      371,018     165,612 
                % sq. ft (b)          0.0%        0.0%        0.0%        51.1%       22.8% 
                annual rent (c)          0           0           0    6,757,560   3,046,294 
                psf (d)              $0.00       $0.00       $0.00       $18.21      $18.39 
                tenants (e)              0           0           0            1           0 
                                 ----------- ----------- ----------- ----------- ----------- 
Total 
  Properties    square feet (a)     60,548       9,465      24,548      509,320     205,932 
                % sq. ft (b)          5.4%        0.8%        2.2%        45.2%       18.3% 
                annual rent (c)    938,578     133,634     241,383    7,991,481   3,554,326 
                psf (d)             $15.50      $14.12       $9.83       $15.69      $17.26 
                tenants (e)              2           2           3            7           1 
</TABLE>

<TABLE>
<CAPTION>
                                                                       2005 & 
Property                            2002        2003        2004       beyond 
- --------                         ----------- ----------- ----------- ----------- 
<S>             <C>                 <C>         <C>         <C>       <C>
Lake Marriott   square feet (a)         0           0           0       125,119 
                % sq. ft (b)         0.0%        0.0%        0.0%         31.3% 
                annual rent (c)         0           0           0     1,400,718 
                psf (d)             $0.00       $0.00       $0.00        $11.20 
                tenants (e)             0           0           0             2 
Shoreline       square feet (a)         0           0           0       189,878 
                % sq. ft (b)         0.0%        0.0%        0.0%         26.1% 
                annual rent (c)         0           0           0     4,567,231 
                psf (d)             $0.00       $0.00       $0.00        $24.05 
                tenants (e)             0           0           0             0 
                                 ----------- ----------- ----------- ----------- 
Total 
  Properties    square feet (a)         0           0           0       314,997 
                % sq. ft (b)         0.0%        0.0%        0.0%         28.0% 
                annual rent (c)         0           0           0     5,967,949 
                psf (d)             $0.00       $0.00       $0.00        $18.95 
                tenants (e)             0           0           0             2 
</TABLE>

(a) Total area in square feet covered by such leases 

(b) Percentage of total square feet represented by such leases 

(c) Annualized expiring Net rental income represented by such leases 

(d) Annual net rent (c) divided by square feet (a) 

(e) The number of tenants whose lease will expire 

Historical Non-Incremental Revenue-Generating Capital Expenditures and Tenant 
Improvement Costs 


   The following table sets forth annual and per square foot recurring, 
non-incremental revenue-generating capital expenditures and non-incremental 
revenue-generating tenant improvement costs to retain revenues attributable 
to existing leased space (including leasing commissions and rent concessions) 
for the period 1992 through 1996. All capital expenditures presented for the 
Properties are non-incremental revenue-generating and therefore exclude 
redevelopment costs associated with Crosby Corporate Center and 100 William 
Street. As noted, revenue-generating tenant improvement costs are excluded 
from the table set forth immediately below. Such costs generally relate to 
vacant space, unless a prior tenant was paying rent while such space was 
being improved for a future tenant, in which case the costs to improve such 
space were considered non-incremental revenue-generating and, therefore, 
included in the table. The historical capital expenditures and tenant 
improvement costs set forth below are not necessarily indicative of future 
recurring, non-incremental revenue-generating capital expenditures or non- 
incremental revenue-generating tenant improvement costs. 
<TABLE>
<CAPTION>
                                                               Properties 
                                  --------------------------------------------------------------------- 
                                                                                             1992-1996 
                                   1992(a)  1993(a)     1994(a)     1995(a)      1996(a)    Average(a) 
                                   -------- -------- ------------ ------------ ------------ ----------- 
                                           (dollars in thousands, except per square foot data) 
<S>                                <C>       <C>        <C>          <C>          <C>         <C>
Capital Expenditures 
 Properties Total 
  Annual                           $  702    $  226     $1,001(b)    $3,309(b)    $6,023(c)   $2,252 
  Per square foot                  $  0.23   $ 0.08     $ 0.24       $  0.50      $  0.57     $ 0.32 
 Company's Proportionate Share 
  Annual                           $  551    $  193     $  609(b)    $2,174(b)    $3,849(c)   $1,475 
  Per square foot                  $  0.26   $ 0.09     $ 0.15       $  0.44      $  0.44     $ 0.28 
Non-incremental Revenue- 
  Generating Tenant Improvement 
  Costs 
 Properties Total 
  Annual                           $2,650    $2,077     $4,289       $7,369       $9,592      $5,195 
  Per square foot improved         $ 7.38    $10.43     $10.24       $10.13       $ 6.72      $ 8.98 
 Company's Proportionate Share 
  Annual                           $2,167    $1,806     $3,280       $7,040       $9,027      $4,664 
  Per square foot improved         $ 8.86    $11.78     $  9.71      $10.60       $12.65      $10.72 
</TABLE>

                                    

                                      S-55
<PAGE>

(a) Information regarding the Properties acquired in the Initial Offering is 
    presented for all periods. Information regarding Properties acquired 
    subsequent to the Initial Offering is presented from the date of 
    acquisition. 

(b) Excludes cost incurred in connection with the redevelopment of the Center 
    Plaza Property of $1.4 million and $0.86 million, or $1.1 million and 
    $0.86 million for the Company's proportionate share of such expenditures 
    for the years 1994 and 1995, respectively. A portion of these capital 
    expenditures are incremental revenue-generating expenditures. 


(c) Excludes 1996 costs incurred in connection with non-recurring events such 
    as code-required enhancements and other unique expenditures. The 
    non-recurring expenditures were $3.0 million for 1996. The Company's 
    proportionate share was $2.3 million for 1996. 


Historical Incremental Revenue-Generating Tenant Improvement Costs 

   The following table sets forth annual and per square foot incremental 
revenue-generating tenant improvement costs (including lease commissions, 
legal and other leasing costs) for the period 1992 through 1996. Costs 
associated with redevelopment of Crosby Corporate Center and 100 William 
Street are excluded from this table. Incremental revenue-generating tenant 
improvement costs generally relate to vacant non-revenue generating space. 
The historical incremental revenue-generating tenant improvement costs set 
forth below are not necessarily indicative of future incremental 
revenue-generating tenant improvement costs. 


<TABLE>

<CAPTION>
                                                            Properties 
                                    ------------------------------------------------------------ 
                                                                                     1992-1996 
                                    1992(a)  1993(a)   1994(a)   1995(a)   1996(a)   Average(a) 
                                    -------- --------  --------  -------- --------- ----------- 
                                        (dollars in thousands, except per square foot data) 
<S>                                 <C>      <C>       <C>       <C>       <C>        <C>
Incremental Revenue-Generating 
 Tenant Improvement Costs 
  Properties Total 
   Annual                           $3,055    $7,438    $6,141   $8,027    $15,890     $8,110 
   Per square foot improved         $22.55    $29.90    $26.92   $29.56    $ 20.39     $25.86 
 Company's Proportionated Share 
  Annual                            $2,134    $5,221    $4,051   $7,283    $15,314     $6,801 
  Per square foot improved          $24.55    $31.26    $25.77   $30.24    $ 20.26     $26.42 
</TABLE>



(a) Information regarding the Properties acquired in the Initial Offering is 
    presented for all periods. Information regarding Properties acquired 
    subsequent to the Initial Offering is presented from the date of 
    acquisition. 



                                     

                                      S-56
<PAGE>


Mortgage Indebtedness and Credit Facility 

   The Company's total outstanding consolidated mortgage debt and its 
proportionate share of the total outstanding unconsolidated mortgage debt on 
the Properties (excluding Rowes Wharf) will be approximately $697.5 million 
at April 1, 1997. Additionally, at April 1, 1997, the Company will have 
approximately $153.0 million outstanding under the Credit Facility. The 
following table sets forth certain information regarding the consolidated and 
unconsolidated mortgage debt obligations of the Company, including mortgage 
obligations relating to specific Properties, and the Credit Facility. All of 
the mortgage debt is nonrecourse to the Company. 

<TABLE>

<CAPTION>
                                   Principal 
                                    Amount     Company's 
                                    (as of     Portion of  Interest     Maturity          Prepayment 
            Property                4/1/97)    Principal     Rate         Date            Provisions 
 -------------------------------- -----------------------  --------- -------------- --------------------- 
                                                       (dollar amounts in millions) 
<S>                                 <C>          <C>         <C>        <C>          <C>
Mortgage Indebtedness: 
Consolidated Properties 
150 Federal Street                  $ 56.8       $ 56.8      6.67%      11/1/98(a)   Prepayable subject to 
                                                                                     conditions(b) 
175 Federal Street                    12.9         12.9      8.00%       7/1/98(c)   Prepayable subject to 
                                                                                     conditions(d) 
Wellesley Office Park                 55.0         55.0      7.23%       2/1/03(e)   Prepayable subject to 
                                                                                     conditions(f) 
Center Plaza                          60.0         60.0      7.23%       3/1/03(g)   Prepayable subject to 
                                                                                     conditions(h) 
Perimeter Center Portfolio           218.0        218.0      7.08%      3/31/06(i)   Prepayable subject to 
                                                                                     conditions(j) 
John Marshal I                        20.5         20.5      8.38%        12/1/08    Prepayable subject to 
                                                                                     conditions(k) 
Northridge I                          13.6         13.6      8.19%       1/1/07(l)   Prepayable subject to 
                                                                                     conditions(m) 
E.J. Randolph                         15.0         15.0      8.19%       1/1/07(n)   Prepayable subject 
                                  -----------------------                            to conditions(m) 
 Total Consolidated Properties      $451.8       $451.8 
                                  -----------------------   
Unconsolidated Properties with respect to 
  which the Company is a general 
  partner or shareholder 
One Post Office Square (o)          $ 67.5       $ 33.8      7.00%         8/1/00(p) Prepayable subject to 
                                                                                     conditions(q) 
One Post Office Square (o)            25.0         12.5      8.25%         8/1/00(r) Prepayable subject to 
                                                                                     conditions(s) 
75-101 Federal Street(t)              90.0         46.4      7.61%        10/1/02(u) Prepayable subject 
                                  -----------------------                            to conditions(v) 

Total Unconsolidated Properties      182.5         92.7 
                                  ----------------------- 
Total Mortgage Debt                 $634.3       $544.5 
                                  ======================= 
Credit Facility: 
 Various Properties(w)              $153.0       $153.0        (x)        6/27/99    Prepayable at any 
                                  =======================                            time without penalty 

</TABLE>


(a) The estimated balance due on maturity is approximately $56.1 million. 

(b) Prepayable subject to a yield maintenance payment based on the rate of 
    United States Treasury Notes having a term closest to the date of 
    maturity but in no event less than 1% of the then balance. Prepayable at 
    par from and after April 1, 1998. 

(c) The estimated balance due on maturity is approximately $12.5 million. 


(d) Prepayable subject to a yield maintenance payment based on the rate of 
    United States Treasury Notes having a term closest to the date of 
    maturity plus 1.50%, but in no event less than 1% of the then balance. 
    Prepayable at par from and after March 1, 1998. 



                                    

                                      S-57
<PAGE>


(e) The estimated balance due on maturity is approximately $51.9 million. 

(f) Prepayable after August 1, 1999 subject to a yield maintenance payment 
    based on the rate of United States Treasury Notes having a term closest 
    to the date of maturity plus 0.50%. Prepayable at par from and after 
    October 1, 2002. 

(g) The estimated balance due on maturity is approximately $56.7 million. 

(h) Prepayable after September 1, 1999 subject to a yield maintenance payment 
    based on the rate of United States Treasury Notes having a term closest 
    to the date of maturity plus 0.50%. Prepayable at par from and after 
    November 1, 2002. 

(i) The estimated balance due on maturity is approximately $183.8 million. 

(j) Closed to prepayment during the first two years of the loan, prepayable 
    in years three through ten subject to a yield maintenance payment based 
    on the rate of United States Treasury Notes having a term closest to the 
    date of maturity plus 0.50%, and prepayable at par during the last 90 
    days of the loan. 

(k) Mandatory annual prepayments and additional prepayments subject to 
    payments of 5% of the amount prepaid before November 1, 1999, decreasing 
    by 0.5% each subsequent year through September 1, 2008, after which no 
    premium is due upon prepayment. 

(l) The estimated balance due on maturity is approximately $11.7 million. 


(m) Prepayable subject to a payment equal to the greater of 1% of the 
    outstanding principal balance or a yield maintenance payment based on the 
    rate of United States Treasury Notes having a term closest to the date of 
    maturity for a prepayment occurring prior to December 1, 1998, such 
    interest rate to be increased by 0.5% for a prepayment occurring after 
    December 1, 1998. 


(n) The estimated balance due on maturity is approximately $12.9 million. 

(o) The Company owns a 50% general partner interest in the partnership that 
    owns One Post Office Square. Consequently, the Company's portion of the 
    debt on the One Post Office Square Property is 50% of the principal 
    amount. 

(p) The Company's share of the estimated balance due on maturity is 
    approximately $31.9 million. 

(q) Prepayable after August 31, 1997 subject to a yield maintenance payment 
    based on the rate of United States Treasury Notes having a term closest 
    to the date of maturity plus 0.50%. Prepayable at par from and after 
    February 1, 2000. 

(r) The Company's share of the estimated balance due on maturity is 
    approximately $11.2 million. 

(s) Prepayable subject to a yield maintenance payment based on the rate of 
    United States Treasury Notes having a term closest to the date of 
    maturity plus 1.50%. Prepayable at par from and after May 1, 2000. 

(t) The Company owns an approximate 51.6% equity interest in the private REIT 
    that owns 75-101 Federal Street. Consequently, the Company's portion of 
    the debt on the 75-101 Federal Street property is approximately 51.6% of 
    the principal amount. 

(u) The Company's share of the estimated balance due on maturity is 
    approximately $44.0 million. 

(v) Prepayable after January 1, 1999 subject to a yield maintenance payment 
    based on the rate of United States Treasury Notes having a term closest 
    to the date of maturity plus 0.50%. Prepayable at par from and after June 
    1, 2002. 

(w) The Credit Facility is secured by cross-collateralized mortgages and 
    assignments of rents on the Crosby Corporate Center, a portion of 150 
    Federal Street, One Canal Park, Westwood Business Centre, Westlakes 
    Office Park, 2 Oliver Street, Ten Canal Park, Russia Wharf, AT&T Plaza, 
    Tri-State International office park, 1333 H Street, N.W., 1300 North 17th 
    Street, 1616 North Ft. Myer and the New England Executive Park. 

   
(x) Outstanding balances under the Credit Facility generally bear interest, 
    at the Company's option, at either (i) the higher of (x) Bank of Boston's 
    base interest rate and (y) 1/2% above the overnight federal funds 
    effective rate or (ii) the Eurodollar rate plus 175 basis points (1.75%).
    


                                   

                                      S-58
<PAGE>


   The Company owns a 45% indirect limited partner interest in Rowes Wharf 
Associates, the partnership that owns the hotel space and leases the office 
and retail space at Rowes Wharf. The Company (together with an affiliate) and 
Equitable each own one-half of the first mortgage debt on the Rowes Wharf 
Property. The Company has no obligation to fund principal or interest 
payments with respect to the unconsolidated debt of Rowes Wharf Associates or 
to fund operating or other deficits with respect to Rowes Wharf Associates. 
As of April 1, 1997, the aggregate outstanding principal amount of Rowes 
Wharf Associates' first mortgage debt, which consists of two tiers of debt, 
equals approximately $201.2 million. The first-tier debt is equal to 
approximately $126.0 million, currently bears interest at a rate of 8.71% per 
annum and matures in April 1999. Pursuant to its terms, the first-tier debt 
may be prepaid at any time and principal repayment may be extended for up to 
three years, provided that a 1.1 interest coverage is achieved at that time. 
Rowes Wharf Associates currently maintains a significant cash account to fund 
any shortfalls on this debt. The second-tier debt is equal to approximately 
$75.2 million, currently bears interest at the lesser of 6.0% or 50.0% of 
cash flow after interest payments have been made in respect of the first-tier 
debt and matures in April 2002. The second-tier debt may be prepaid in full 
with 50% of the net proceeds from certain sales or refinancings of Rowes 
Wharf Associates' debt, regardless of the amount of such proceeds, or at 
maturity based on the appraised value of the Property. 

                                     

                                      S-59
<PAGE>


                               USE OF PROCEEDS 


   The net cash proceeds to the Company from the sale of the Common Stock 
offered hereby, after deduction of estimated expenses of the Offering, are 
estimated to be approximately $230.3 million (approximately $264.8 million if 
the Underwriters' over-allotment option is exercised in full). 

   The Company intends to apply approximately $137.0 million of the net 
proceeds of the Offering to purchase the Pending Acquisitions (or repay 
amounts drawn under the Credit Facility to acquire the Pending Acquisitions) and
approximately $93.3 million of the net proceeds to repay amounts drawn under 
the Credit Facility in connection with the purchase of the Recent 
Acquisitions. The Company will also assume approximately $136 million of 
mortgage debt and issue approximately $50 million of Units to consummate the 
Pending Acquisitions. All outstanding borrowings under the Credit Facility 
mature in June 1999 and generally bear interest, at the Company's option, at 
either (i) the higher of (x) Bank of Boston's base interest rate and (y) 
one-half of one percent (1/2%) above the overnight federal funds effective 
rate or (ii) the Eurodollar rate plus 175 basis points (1.75%). No prepayment 
penalties are required in connection with the repayment of the Credit 
Facility. Pending application of the net proceeds, the Company will invest 
such portion of the net proceeds in interest-bearing accounts and short-term, 
interest-bearing securities. 



                                    

                                      S-60
<PAGE>



             PRICE RANGE OF COMMON STOCK AND DISTRIBUTION HISTORY 


   The Company's Common Stock trades on the NYSE under the symbol "BCN." On 
March 26, 1997, the reported closing sale price per share of Common Stock on 
the NYSE was $35 and there were approximately 410 holders of record of the 
Company's Common Stock. The following table sets forth the quarterly high and 
low closing sales prices per share of the Common Stock reported on the NYSE 
and the distributions paid by the Company with respect to each such period. 



              Quarter Ended                  High       Low      Distributions 
 ---------------------------------------------------  --------  ----------------
March 31, 1995                            $20        $17-1/2        $.40 
June 30, 1995                             $21-1/8    $19-1/4        $.42 
September 30, 1995                        $21-3/4    $19-7/8        $.42 
December 31, 1995                         $23        $20-1/8        $.42 
March 31, 1996                            $26-5/8    $22-5/8        $.42 
June 30, 1996                             $26-1/4    $24-1/4        $.4625 
September 30, 1996                        $29        $24-3/4        $.4625 
December 31, 1996                         $37        $28-3/4        $.4625 
March 31, 1997 (through March 26, 1997)   $36-3/8    $34-1/8          N/A 

   The Company pays a quarterly distribution on its Common Stock of $.4625 
per share, which on an annualized basis, is equal to an annual distribution 
of $1.85 per share of Common Stock. Future distributions by the Company will 
be at the discretion of the Board of Directors and will depend on the 
Company's financial condition, its capital requirements, the annual 
distribution requirements under the REIT provisions of the United States Code 
and such other factors as the Board of Directors deems relevant. There can be 
no assurance that any such distributions will be made by the Company. 

   Distributions by the Company to the extent of its current and accumulated 
earnings and profits for Federal income tax purposes generally will be 
taxable to stockholders as ordinary dividend income. Distributions in excess 
of current and accumulated earnings and profits will be treated as a 
non-taxable reduction of the stockholder's basis in its shares of Common 
Stock to the extent thereof, and thereafter as taxable gain. Distributions 
that are treated as a reduction of the stockholder's basis in its shares of 
Common Stock will have the effect of deferring taxation until the sale of the 
stockholder's shares. 

   The Company has adopted a dividend reinvestment program under which 
holders of Common Stock may elect automatically to reinvest dividends in 
additional Common Stock. The Company may, from time to time, repurchase 
Common Stock in the open market for purposes of fulfilling its obligations 
under this dividend reinvestment program or may elect to issue additional 
Common Stock. 

Historical Total Return 


   An investor who purchased Common Stock in the Company's Initial Public 
Offering on May 24, 1994, who reinvested all dividends paid in additional 
shares of Common Stock, and who held such shares through the close of 
business on March 26, 1997 would have had a cumulative pretax total return of 
153% or an annual compounded pretax return of 38% based upon the closing 
price of the Common Stock on March 26, 1997. Past performance, however, is 
not necessarily indicative of the results that will be obtained in the future 
from an investment in the Common Stock, and no assurance can be given that an 
investor in this Offering will achieve similar results. 



                                     

                                      S-61
<PAGE>


                                CAPITALIZATION 

   The following table sets forth the capitalization of the Company on an 
historical basis as of December 31, 1996, and for the Company as adjusted to 
give effect to the issuance of the shares of Common Stock in the Offering and 
the application of the net proceeds from the Offering as if the Offering and 
the acquisitions of the Pending Acquisitions had occurred on December 31, 
1996. See "Use of Proceeds." The information set forth in the table should be 
read in conjunction with the summary and selected financial information 
presented elsewhere in this Prospectus Supplement and the Consolidated 
Financial Statements and notes thereto incorporated by reference into the 
accompanying Prospectus. 

                                                Historical   As Adjusted(1) 
                                               -------------  --------------- 
                                                      (in thousands) 
DEBT: 
 Credit Facility                                $  153,000     $   59,714 
 Mortgage Notes Payable                            452,212        588,212 
                                               -------------  --------------- 
  Total Debt                                       605,212        647,926 
                                               -------------  --------------- 
MINORITY INTEREST:                                 108,551        158,551 
                                               -------------  --------------- 
STOCKHOLDERS EQUITY: 
 Common Stock, $0.01 par value; 100,000,000 
   shares authorized; 48,116,480 (historical) 
   shares issued and outstanding (55,116,480 
   shares on an as adjusted basis)(1)                  481            551 
 Additional paid-in capital                      1,022,110      1,252,340 
 Cumulative net income                              60,047         60,047 
 Cumulative dividends                              (83,488)       (83,488) 
                                               -------------  --------------- 
    Total stockholders' equity                     999,150      1,229,450 
                                               -------------  --------------- 
    Total capitalization                        $1,712,913     $2,035,927 
                                               =============  =============== 


(1) Does not include Common Stock reserved for issuance upon (i) possible 
    redemption of 7,702,499 Units (including Units to be issued in connection 
    with a Pending Acquisition) and (ii) exercise of 3,619,747 shares of Common
    Stock reserved for issuance under the 1994 Stock Option Plan, the 1996 
    Stock Option Plan and dividend reinvestment plan. 



                                     

                                      S-62
<PAGE>


                        SELECTED FINANCIAL INFORMATION 

   The following table sets forth selected financial and operating 
information on an as adjusted basis for the Company and on a combined 
historical basis for the Company and the Predecessor. The consolidated 
results of operations of the Company for the years ended December 31, 1996 
and 1995 and for the period May 26, 1994 to December 31, 1994, the combined 
results of operations of the Predecessor for the period January 1, 1994 to 
May 25, 1994 and the combined historical operating information of the 
Predecessor for the years ended December 31, 1993 and 1992 have been derived 
from the financial statements audited by Coopers & Lybrand L.L.P., 
independent accountants, whose report with respect to the years 1995, 1994 
and 1993 is incorporated by reference into the accompanying Prospectus. 

   The unaudited selected pro forma financial and operating information is 
presented as if the Offering, the acquisition of the Properties acquired 
since January 1, 1996, the acquisition of the Pending Acquisitions had 
occurred as of January 1, 1996, for the condensed consolidated statement of 
operations. The pro forma financial information is not necessarily indicative 
of what the results of operations 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 and results of operations. 

                                    

                                      S-63
<PAGE>

<TABLE>

<CAPTION>
                                                        Beacon Properties Corporation 
                                                       Selected Financial Information 
                                                Company                                  Predecessor 
                            -----------------------------------------------  ----------------------------------- 
                                                                  For the     For the 
                                          For the     For the      Period      Period 
                                            Year        Year      May 26,    January 1,        Years Ended 
                             Pro Forma     Ended       Ended      1994 to     1994 to         December 31, 
                                1996      December    December    December    May 25,    ----------------------- 
                            (unaudited)   31, 1996    31, 1995    31, 1994      1994        1993        1992 
                            ----------- ----------- ----------- ----------- ----------- -----------  ----------- 
                                              (dollars in thousands, except per share amounts) 
OPERATING INFORMATION: 
<S>                           <C>         <C>         <C>         <C>          <C>         <C>         <C>
Revenues: 
 Rental income                $279,573    $147,825    $71,050     $25,144      $ 5,776     $14,315     $11,406 
 Management fees                 3,005       3,005      2,203          --       1,521        3,533       3,331 
 Recoveries from tenants        33,048      16,719      9,742       4,488       1,040        2,349       1,989 
 Mortgage interest income        5,581       4,970      2,546          --          --           --          -- 
 Other income                   17,348      11,272      5,502       2,301         675        2,176       2,003 
                            ----------- ----------- ----------- ----------- ----------- -----------  ----------- 
   Total revenues              338,555     183,791     91,043      31,933       9,012       22,373      18,729 
                            ----------- ----------- ----------- ----------- ----------- -----------  ----------- 
Expenses: 
Property expenses               69,078      37,211     18,090       7,034       2,086        4,580       4,522 
Real estate taxes               34,103      18,124     10,217       3,325         595        1,354       1,204 
General and administrative      24,830      19,331      9,755       3,122       1,399        4,357       4,658 
Mortgage interest expense       47,162      30,300     15,226       4,992       2,798        7,650       7,203 
Interest--amortization of 
  financing costs                2,099       2,084      1,370         617         373          192         138 
Depreciation and 
  amortization                  64,927      33,184     17,428       6,924       2,385        5,577       5,505 
                            ----------- ----------- ----------- ----------- ----------- -----------  ----------- 
  Total expenses               242,199     140,234     72,086      26,014       9,636       23,710      23,230 
                            ----------- ----------- ----------- ----------- ----------- -----------  ----------- 
Income (loss) from 
  operations                    96,356      43,557     18,957       5,919        (624)      (1,337)     (4,501) 
Equity (loss) in joint 
  ventures and 
  corporations(1)                4,989       4,989      3,234         929         198       (5,953)     (1,544) 
Income (loss) from 
  continuing operations        101,345      48,546     22,191       6,848        (426)      (7,290)     (6,045) 
Discontinued 
  operations-Construction 
  Company: 
 Income (loss) from 
  operations:                   (2,609)     (2,609)       (12)        477         102          440         136 
 Loss on sale                     (249)       (249)        --          --          --           --          -- 
Income (loss) before 
  minority interest             98,487      45,688     22,179       7,325        (324)      (6,850)     (5,909) 
Minority interest in loss 
  of combined partnerships          --          --         --          --         931        1,539       2,656 
Minority interest in 
  Operating Partnerships       (12,026)     (5,988)    (4,119)     (1,670)         --           --          -- 
                            ----------- ----------- ----------- ----------- ----------- -----------  ----------- 
Income (loss) before 
 extraordinary  items         $ 86,461      39,700     18,060       5,655         607       (5,311)     (3,253) 
                            ==========
Extraordinary items, net of 
  minority interest                         (3,368)        --          --       8,898        1,554          -- 
                                        ----------- ----------- ----------- ----------- -----------  ----------- 
Net income (loss)(2)                      $ 36,332    $18,060     $  5,655     $ 9,505     $(3,757)    $(3,253) 
                                        =========== =========== =========== =========== ===========  ===========
Per Share of Common Stock 
  data: 
 Income from continuing 
   operations                 $   1.61    $    1.41   $  1.09     $  0.45          --           --          -- 
 Discontinued operations- 
   Construction Company: 
 Income (loss) from 
  operations                  $  (0.04)   $  (0.08)   $ (0.00)    $  0.03         --           --          -- 
 Loss on sale                 $  (0.00)   $  (0.01)        --          --          --           --          -- 
 Income before 
  extraordinary items         $   1.57    $   1.32    $  1.09     $  0.48          --           --          -- 
 Extraordinary items                      $  (0.11)        --          --          --           --          -- 
Net income                                $   1.21    $   1.09    $  0.48          --           --          -- 
</TABLE>


                                     

                                      S-64
<PAGE>


<TABLE>

<CAPTION>
                                                        Beacon Properties Corporation 
                                                       Selected Financial Information 
                                                Company                                  Predecessor 
                            -----------------------------------------------  ----------------------------------- 
                                                                  For the     For the 
                                          For the     For the      Period      Period 
                                            Year        Year      May 26,    January 1,        Years Ended 
                             Pro Forma     Ended       Ended      1994 to     1994 to         December 31, 
                                1996      December    December    December    May 25,    ----------------------- 
                            (unaudited)   31, 1996    31, 1995    31, 1994      1994        1993        1992 
                            ----------- ----------- ----------- ----------- ----------- -----------  ----------- 
                                              (dollars in thousands, except per share amounts) 
<S>                          <C>        <C>         <C>          <C>          <C>         <C>          <C>
 Cash dividends declared                $     1.765 $       1.24 $      0.96        --          --          -- 
 Cash dividends paid                    $     1.765 $       1.64 $      0.56        --          --          -- 
 Weighted average common 
  shares  outstanding        55,116,480  29,932,327  16,525,245  11,816,380         --          --          -- 
BALANCE SHEET INFORMATION: 
 Real estate before 
  accumulated  depreciation $ 2,030,630 $ 1,691,530 $   471,142 $   400,419   $ 82,198    $ 81,220    $ 78,580 
 Total assets                 2,102,426   1,779,412     534,797     400,861     77,470      85,497      93,327 
 Mortgage debt                  588,212     452,212      70,536      90,936     69,240      87,091      86,610 
 Note Payable, Credit 
  Facility                       59,714     153,000     130,500     130,300         --          --          -- 
 Total liabilities              714,425     671,711     239,013     261,100    129,836     143,451     142,015 
 Total equity (deficit)       1,229,450     999,150     258,822     102,038    (52,366)    (57,954)    (48,688) 

 (1) Including deductions 
     for:  Depreciation and 
       amortization         $     4.033 $     4,033 $     2,306 $     3,013 
 (2) Company share of 
     Operating  Partnership       87.79%       86.89%       81.31%       77.20% 
</TABLE>


                                     

                                      S-65
<PAGE>


                                  MANAGEMENT 

Officers and Directors 
The persons who are officers and Directors of the Company and their 
respective positions are as follows: 

<TABLE>

<CAPTION>
          Name           Age                 Position and Offices Held 
- -----------------------  ---------------------------------------------------------- 
<S>                       <C> <C>
Officers: 
Alan M. Leventhal         44  President, Chief Executive Officer and Director 
Lionel P. Fortin          53  Executive Vice President, Chief Operating Officer and 
                              Director 
Douglas S. Mitchell       54  Senior Vice President--Leasing/Management and 
                              Development 
Robert J. Perriello       54  Senior Vice President and Chief Financial Officer 
Donald B. Brooks          54  Senior Vice President and Chief Executive, Beacon 
                              Properties Southeast 
Charles H. Cremens        42  Senior Vice President and Chief Investment Officer 
Carol G. Judson           44  Senior Vice President, Corporate Development 
William A. Bonn, Esq      45  General Counsel 
Nancy J. Broderick        40  Vice President and Treasurer 
Steven D. Fessler         37  Vice President, Asset Management 
Claude B. Hoopes          46  Vice President, Leasing 
Henry Irwig               52  Vice President, Commercial Properties 
G. Douglas Lanois         36  Controller 
Erin R. O'Boyle           36  Vice President, Acquisitions 
Thomas J. O'Connor        40  Vice President, Acquisitions 
Randy J. Parker           38  Vice President, Investor Relations 
James J. Whalen           33  Vice President, Information Systems 
M. Wistar Wood            36  Vice President, Acquisitions 

Directors: 
Edwin N. Sidman           53  Chairman of the Board and Director 
Norman B. Leventhal       79  Director 
Graham O. Harrison        71  Director 
William F. McCall, Jr     60  Director 
Steven Shulman            54  Director 
Scott M. Sperling         37  Director 
Dale F. Frey              64  Director 
</TABLE>


   The following are biographical summaries of the experience of the officers 
and Directors of the Company: 


   Mr. Alan Leventhal has served as President, Chief Executive Officer and a 
Director of the Company since 1994. Mr. Leventhal joined Beacon in 1976 after 
receiving a degree in economics from Northwestern University in 1974 and a 
Master of Business Administration from the Amos Tuck School of Business 
Administration at Dartmouth College in 1976. Mr. Leventhal is a trustee of 
the Beth Israel Corporation, trustee of Boston University, trustee of the New 
England Aquarium Corporation and a member of the Visiting Committee of the 
College of Arts and Sciences at Northwestern University. He is also a member 
of the Board of Overseers of WGBH and the Museum of Science. Mr. Leventhal is 
the son of Norman B. Leventhal and the brother-in-law of Edwin N. Sidman. 

    Mr. Fortin serves as Executive Vice President, Chief Operating Officer and a
Director of the Company. From May 1994 through February 1995, Mr. Fortin served
as Chief Financial Officer of the Company. From February 1995 through January
1997, Mr. Fortin served as Senior Vice President of the Company. Mr. Fortin
became Executive Vice President and a Director of the Company in January 1997.
Before joining Beacon in 1973, Mr. Fortin was an Audit Supervisor with Laventhol
& Horwath. Mr. Fortin graduated from Bentley College in 1968 and is a member of
the American Institute of Certified Public Accountants and the Massachusetts
Society of Certified Public Accountants.



                                    

                                      S-66
<PAGE>



   Mr. Mitchell has served as the Senior Vice President-Leasing/Management 
and Development of the Company and as President of the Management Company 
since 1994. In these capacities, Mr. Mitchell is responsible for the overall 
leasing activities, property management and development activity of the 
Company. He joined Beacon in 1961. He graduated from the Wentworth Institute 
in 1962 and is a member of the Greater Boston Real Estate Board. Mr. Mitchell 
is also a licensed real estate broker in Massachusetts and New York. 

  Mr. Perriello has served as Senior Vice President of the Company since May
1994 and became Chief Financial Officer of the Company in February of 1995. He
joined Beacon in 1970. During his career at Beacon, Mr. Perriello has been
responsible for many aspects of commercial development, including the debt and
equity financing of Beacon's Properties. Prior to joining Beacon, he was a
consulting engineer with Frederick R. Harris, Inc. in New York City and served
as an officer in the U.S. Army Corps of Engineers. Mr. Perriello holds a
Bachelor's degree in Civil Engineering from Rensselaer Polytechnic Institute and
a Master's of Business Administration from Harvard Business School. His
professional affiliations include membership in the Urban Land Institute.

   
    Mr. Brooks joined the Company in June 1996 and has served as Senior Vice
President of the Company and Chief Executive, Beacon Properties Southeast since
that time. From 1986 to joining the Company, Mr. Brooks was a private investor,
consultant and real estate advisor in the Atlanta area. He was President and
Chief Operating Officer of The Landmarks Group in Atlanta from 1974 to 1986,
responsible for the development of over 3 million square feet of office space in
30 buildings. Mr. Brooks holds a law degree and Bachelor's degree in Accounting
from Duke University.

    Mr. Cremens joined the Company in February 1996 and has served as the
Senior Vice President and Chief Investment Officer of the Company since that
time. Prior to joining the Company, Mr. Cremens served as Vice President and
Head of Mortgage Loans and Real Estate Investments with Aetna Life & Casualty
Company from 1993 to 1996. Prior to his term at Aetna, Mr. Cremens held various
senior management positions with Bank of Boston from 1978 to 1993, including
Managing Director of Corporate Finance and Manager of the Restructured Real
Estate and OREO Departments. At the Company, Mr. Cremens is responsible for
establishing and implementing a long-term acquisition and portfolio strategy for
the Company. Mr. Cremens holds a Bachelor's degree from Williams College.
    

   Ms. Judson has served as the Senior Vice President, Corporate Development 
of the Company since 1996. In this capacity, Ms. Judson is responsible for 
the Company's corporate development, human resources and administration. 
Before joining Beacon in 1980, Ms. Judson was Managing Director of the Brook 
House, a luxury apartment complex in Brookline, Massachusetts. Ms. Judson 
received her Bachelor of Science degree in mathematics and psychology from 
Curry College. She is a member of the Northeast Human Resources Association 
and the American Management Association. 

  Mr. Bonn has served as General Counsel to the Company since early 1997.
Prior to joining the Company as General Counsel, from 1987 to 1997 Mr. Bonn
worked with Property Capital Trust, another Boston-based real estate investment
trust, and served as Senior Vice President and General Counsel. From 1978 to
1987 Mr. Bonn held various positions as an attorney with The Prudential
Insurance Company of America and was assigned to work with Prudential's Realty
Group in Newport Beach and Los Angeles, California; New York City and at
Prudential's headquarters in Newark, New Jersey. From 1976 to 1978 Mr. Bonn was
engaged in the private practice of law in Los Angeles. Mr. Bonn holds a Bachelor
of Science Degree from the University of California at San Diego and a Juris
Doctor degree from the University of San Diego. He is admitted to practice law
in Massachusetts, New York and California, and is a member of the American,
California and Boston Bar Associations.

   Ms. Broderick has served as Vice President and Treasurer of the Company 
since 1994. In this capacity, Ms. Broderick is responsible for all financial 
operations of the Company including administration of the Credit Facility. 
Ms. Broderick joined Beacon in 1983. Ms. Broderick holds a Bachelor of 
Science degree in Accounting from Stonehill College and a Master of Science 
degree in Taxation from Bentley College. She is a member of the American 
Institute of Certified Public Accountants and the Massachusetts Society of 
Public Accountants. 

   Mr. Fessler has served as Vice President, Asset Management of the Company
since 1994. In this capacity, Mr. Fessler has overall responsibility for the
asset management of the Company's property portfolio. From 1983 to 1991 Mr.
Fessler served Beacon as Senior Development Manager and Vice President,
Development. Prior to rejoining Beacon in 1994, Mr. Fessler served as a Senior
Investment Manager with Copley Real Estate Advisors.



                                     

                                      S-67
<PAGE>

Mr. Fessler holds Bachelor's and Master's degrees from Stanford University. He 
serves on the Board of Directors of the Massachusetts chapter of the National
Association of Industrial and Office Properties.

   
    Mr. Hoopes joined Beacon in 1990 and has served as Vice President, Leasing
of the Company since 1994. In this capacity, Mr. Hoopes has responsibility for
the overall leasing strategy and leasing performance of the Company's portfolio,
as well as overseeing the leasing of the three million square feet of space
managed and leased for third party institutional clients. Mr. Hoopes was
previously a senior officer of The Landmarks Group, a major Atlanta developer,
where he was responsible for six million square feet of leasing including an
office park adjacent to the Perimeter Center Portfolio. Mr. Hoopes is a graduate
of Princeton University.
    

   Mr. Irwig has served as Vice President, Commercial Properties of the 
Company since 1994. In this capacity, Mr. Irwig is responsible for the 
management of the Company's property portfolio and integrating third-party 
and acquisition properties into the Company's portfolio. Mr. Irwig joined 
Beacon in 1985 and since that time has held various positions in other 
divisions of the Company relating to the assessment, repositioning, design, 
construction and management of commercial and institutional buildings. Mr. 
Irwig received his Bachelor of Architecture degree and his Ph.D. from the 
University of Witwatersrand. 

   Mr. Lanois has served as Controller of the Company since 1995. In this 
capacity, Mr. Lanois is responsible for financial reporting, budgeting and 
forecasting financial performance of the Company. Before joining Beacon in 
1992, Mr. Lanois was the Manager of the Real Estate Advisory Service Group 
with Laventhol & Horwath and an Asset Manager with Aldrich, Eastman & Waltch. 
Mr. Lanois received his B.B.A. in Accounting and a B.S. in Hotel, Restaurant 
and Travel Administration from the University of Massachusetts, Amherst. He 
is a certified public accountant and serves on committees for the Greater 
Boston Real Estate Board and the Real Estate Finance Association. 

   Ms. O'Boyle has served as Vice President, Acquisitions of the Company 
since 1994. In this capacity, Ms. O'Boyle manages the search and negotiations 
for ownership opportunities. Ms. O'Boyle joined Beacon in 1985 and previously
served the Company as Vice President, Asset Management. Ms. O'Boyle received 
her Bachelor of Science in structural engineering from the University of 
Delaware and her Master of Science in real estate development from the MIT 
Center for Real Estate Development. Ms. O'Boyle is the past chair of the 
Alumni Association for the MIT Center for Real Estate and is current 
President of the New England Women in Real Estate (NEWIRE). 

   Mr. O'Connor has served as Vice President, Acquisitions of the Company 
since 1997. Mr. O'Connor is responsible for identifying acquisition 
opportunities in Northern and Southern California. Prior to joining the 
Company in 1996, Mr. O'Connor was an asset manager at Copley Real Estate 
Advisors from 1987 to 1996 where he was responsible for a portfolio of 5 million
square feet of office properties, primarily in California. Prior to Copley, 
Mr. O'Connor held positions with Coopers & Lybrand, The Sheraton Corporation 
and PaineWebber Properties. Mr. O'Connor is a graduate of Boston College with 
a Bachelor's degree in Accounting and Finance. 


   Mr. Parker has served as Vice President, Investor Relations of the Company 
since he joined the Company in July 1996. Prior to joining the Company, Mr. 
Parker was Senior Vice President and Portfolio Manager of Aldrich, Eastman & 
Waltch in Boston from 1988 to 1996, responsible for the management of over 
$400 million of investment portfolios on behalf of institutional clients. Mr. 
Parker holds a Master of Business Administration from The Wharton School, 
University of Pennsylvania and a Bachelor of Architecture degree from the 
University of Kentucky. 


   Mr. Whalen has served as Vice President, Information Systems of the Company
since 1995. In this capacity, Mr. Whalen is responsible for overseeing the
maintenance and support of corporate information systems, including an extensive
internal computer network allowing efficient communications with the Properties.
Prior to joining Beacon in January 1993 Mr. Whalen was Director Information
Services and Technology of Plan International from 1989 to 1993. Mr. Whalen is a
graduate of the University of Notre Dame and the recipient of the New York City
Urban Fellowship.

   
    Mr. Wood has served as Vice President, Acquisitions of the Company since
February 1997. In this capacity he manages the search and negotiations for
ownership opportunities. Mr. Wood served as Vice President of Acquisitions for
Metric Realty from August 1995 to 1997 and oversaw all acquisition activity in a
26-state territory. Prior to joining Metric, he was with Copley Real Estate
Advisors from 1992 to July 1995, responsible for
                                     

                                      S-68
<PAGE>
acquisitions and sales. Mr. Wood is a graduate of Princeton University and holds
a MBA from the Wharton School, University of Pennsylvania. He is the founder of
REIAC's Northeast Chapter, and a member of ICSC.
    

   Mr. Sidman has served as the Chairman of the Board and a Director of the 
Company since 1994. He is currently the Managing Partner of The Beacon 
Companies. Prior to joining Beacon in 1971, Mr. Sidman practiced law with 

the predecessor to the firm of Rubin and Rudman in Boston. Mr. Sidman 
graduated from the University of Michigan and holds a law degree from Harvard 
University. Mr. Sidman's professional affiliations include service as Senior 
Vice Chairman of the National Realty Committee. Mr. Sidman's civic commitment 
includes being a past Chairman of the Combined Jewish Philanthropies of 
Greater Boston, a member of the Board of Trustees of Duke University, a 
member of the Board of Directors and Executive Committee for the United Way 
of Massachusetts Bay, a member of the Executive Committee of the Artery 
Business Committee and a member of the Board of The Friends of Post Office 
Square. Mr. Sidman is the son-in-law of Norman B. Leventhal and the 
brother-in-law of Alan M. Leventhal. 


   Mr. Norman Leventhal has served as a Director of the Company since 1994. 
He is the co-founder and Chairman of The Beacon Companies. Mr. Leventhal is a 
graduate of the Boston Latin School and the Massachusetts Institute of 
Technology. At the Massachusetts Institute of Technology, he is a Life Member 
Emeritus of the Corporation and has served MIT in many capacities including 
as a Member of the Executive Committee, Member of the Investment Committee, 
and Chairman of the Corporation Visiting Committee for The School of 
Architecture and Planning. Mr. Leventhal is also an Honorary Life Member of 
the Board of Overseers of The Museum of Fine Arts and has been a Member of 
the Board of Trustees of The Museum of Science. Among other civic 
contributions, Mr. Leventhal has served as Chairman of The Artery Business 
Committee, is Chairman of The Friends of Post Office Square and is Chairman 
of the Trust for City Hall Plaza. Mr. Leventhal also serves as Director of 
Doubletree Corporation and Picower Institute for Medical Research. Mr. 
Leventhal is the father of Alan M. Leventhal and the father-in-law of Edwin 
N. Sidman. 

   Mr. Harrison has served as a Director of the Company since 1994. Mr. 
Harrison has served as Vice President and Chief Investment Officer of Howard 
Hughes Medical Institute ("Hughes") in Bethesda, Maryland from 1985 to 1994. 
Mr. Harrison retired as President of the U.S. Steel Pension Fund in June 
1985, after thirty years of service, to take on the portfolio startup at 
Hughes. He also served as a Director of General Re Corporation in Stamford, 
Connecticut. Mr. Harrison serves as a trustee of Property Capital Trust in 
Boston, a member of the Investment Advisory Committee of the New York State 
Common Retirement Fund, Warburg Pincus Investors, European Strategic 
Investors (London), Emerging World Investors L.P. and Desai Capital 
Management; Vice-Chairman of the Advisory Committee of Butler Capital, 
Chairman of the Swarthmore College Investment Committee, and member of 
Advisory Council--The Trust for Public Land. Mr. Harrison is a graduate of 
Swarthmore College and of Harvard Business School, and is a retired U.S. Air 
Force officer. 

   Mr. McCall has served as a Director of the Company since 1994. Mr. McCall 
has served as Chairman of McCall & Almy, Inc., Boston, Massachusetts, since 
1989. Mr. McCall was a founder of Leggat McCall & Werner in 1965 and served 
as Chairman and Chief Executive Officer of Leggat McCall/Grubb & Ellis 
through 1989. Mr. McCall is currently a director of Citizens Bank of 
Massachusetts, Jobs for Massachusetts and the Massachusetts Business 
Development Corporation. Mr. McCall is also a trustee of the Urban Land 
Institute and a member of the American Society of Real Estate Counselors. Mr. 
McCall is a graduate of The College of the Holy Cross. 

   Mr. Shulman has served as a Director of the Company since 1995. Since 
1984, Mr. Shulman has been active in investment banking through his wholly 
owned company The Hampton Group and Lantona Associates, Inc., where he serves 
as a Managing Director. Currently, Mr. Shulman is a significant shareholder 
and director in a diversified group of companies including Wilshire 
Restaurant Group, Inc., where he previously served as Chairman; Ermanco 
Incorporated; Terrace Holdings, Inc.; and Corinthian Directory. Mr. Shulman 
is a graduate of Stevens Institute of Technology where he received a 
Bachelor's degree in Mechanical Engineering and a Master's degree in 
Industrial Management. Mr. Shulman serves as Vice Chairman on the Board of 
Stevens Institute of Technology. 

   Mr. Sperling has served as a Director of the Company since 1994. Mr. 
Sperling joined Thomas H. Lee Co., a Boston-based investment firm, as a 
general partner in September 1994. Previously, Mr. Sperling served as 
Managing Partner and Vice Chairman of the Aeneas Group, Inc./Harvard 
Management Company from 1984 through 1994. Mr. Sperling has been the founder 
and/or lead investor of numerous companies and has led the acquisition or 
turnaround of companies in a wide variety of industries. He is currently a 
director of Livent, PriCellular Corporation, Softkey, The Learning Company, 
General Chemical Group, Object Design, Inc. and several private firms. He 
received a Master's of Business Administration from the Harvard Business 
School and received his undergraduate degree from Purdue University. Mr. 
Sperling is a member of the Corporation of the Brigham and Women's Hospital 
and a director of the American Technion Society. 



                                    

                                      S-69
<PAGE>



   Mr. Frey has served as a Director of the Company since January 1997. Mr 
Frey also serves on the Board of Directors of Rhone-Poulenc Rorer; USF&G 
Corporation; Praxair, Inc.; Doubletree Hotels Corporation and First American 
Financial Corporation. From 1984 until 1997, Mr. Frey was Chairman and 
President of the Board of Directors of General Electric Investment 
Corporation. From 1980 until 1997, Mr. Frey was also Vice President of 
General Electric Company. Mr. Frey is also Chairman of the Cancer Research 
Fund of the Damon-Runyon-Walter Winchell Foundation and a Trustee of Franklin 
and Marshall College. He also serves on the advisory committees of Forstmann 
Little & Company and the New York State Common Retirement Fund. Mr. Frey is 
also a member of the Financial Executives Institute. Mr. Frey is a graduate of 
Franklin and Marshall College and received a Master of Business 
Administration in Economics and Accounting from New York University. 


Compensation Developments 


   Stock Option Plan. In connection with adopting its 1994 Stock Option Plan, 
the Company reserved 1,102,080 shares of Common Stock for issuance. In 1995, 
stockholders approved an increase in the number of shares of Common Stock 
reserved for issuance under the 1994 Stock Option Plan to an aggregate of 
2,723,565 shares. The Company intends to seek approval from its stockholders 
at the 1997 Annual Meeting to increase the number of shares reserved for 
issuance pursuant to the 1994 Stock Option Plan to 8% of the outstanding 
shares of Common Stock and Units held by limited partners other than the 
Company that are subject to redemption. 

   1997 Extraordinary Performance Stock Incentive Plan for Senior Executives. 
In January 1997, the Compensation Committee of the Board of Directors 
approved the Extraordinary Performance Stock Incentive Plan for Senior 
Executives (the "Incentive Plan") which provides for grants of restricted 
Common Stock to the Company's senior executives if certain performance goals 
are met. The Company intends to seek approval from its stockholders at the 
1997 Annual Meeting to approve the Incentive Plan. 

   Executive Severance Agreements/Special Termination Plan. In January 1997,
the Compensation Committee of the Board of Directors approved the adoption of
Executive Severance Agreements and a Special Termination Plan (the "Severance
Arrangements") which provide for cash severance payments and the continuation of
benefits to certain executive officers of the Company if such officer
experiences a "terminating event" (as defined below) within a given period of
time following a "change in control" (as defined below). The Severance
Agreements define a "change in control" as (i) any person becoming a beneficial
owner of the securities of the Company representing a specified percentage of
either (A) the combined voting power of the Company's then outstanding
securities having the right to vote for the Company's Board of Directors or (B)
the then outstanding shares of all classes of stock of the Company, or (ii)
individuals who, at the date of the Severance Agreements, constituted the Board
of Directors of the Company (the "Incumbent Directors") cease to constitute at
least a majority of the Company's Board of Directors, provided that any person
becoming a director whose election or nomination was approved by at least a
majority of the Incumbent Directors shall be considered an Incumbent Director,
or (iii) the stockholders of the Company approve (A) any consolidation or merger
where the Company's stock does not represent at least 50% of the voting shares
of the surviving company, (B) any sale, lease, exchange or transfer of all or
substantially all of the assets of the Company, or (C) any plan or proposal for
the liquidation or dissolution of the Company. The Severance Agreements define a
"terminating event" as any of the following events occurring subsequent to a
"change in control": (i) termination by the Company of the employment of the
executive for any reason other than (A) a willful act of dishonesty by the
executive, (B) a conviction of the executive of a crime involving moral
turpitude, (C) the gross or willful failure by the executive to substantially
perform his or her duties, or (D) the failure by the executive to perform his or
her full-time duties by reason of his or her death, disability or retirement, or
(ii) termination by the executive of his or her employment with the Company upon
the occurence of (A) a substantial adverse change in the nature or scope of the
executive's responsibilities, authorities, powers, functions or duties, (B) a
substantial reduction in the executive's annual base salary, (C) a relocation of
the Company's offices or (D) the failure by the Company to obtain an effective
agreement from any successor to assume and agree to perform the Severance
Agreement. The Company intends to execute definitive documentation regarding the
Severance Arrangements during the second quarter of 1997.



                                    

                                      S-70

<PAGE>

                      FEDERAL INCOME TAX CONSIDERATIONS 

    The following is a brief and general summary of the material federal income
tax considerations relating to the tax treatment of Common Stock. The following
assumes the Company has and will continue to qualify as a REIT. See "Federal
Income Tax Considerations" in the Prospectus. Goodwin, Procter & Hoar LLP has
acted as counsel to the Company and has reviewed this summary and is of the
opinion that to the extent that it constitutes matters of law, summaries of
legal matters, or legal conclusions, this summary is accurate in all material
respects. For the particular provisions that govern the federal income tax
treatment of the Company and its stockholders, reference is made to Sections 856
through 860 of the Code and the regulations thereunder. The following summary is
qualified in its entirety by such reference.

   The statements in this discussion are based on current provisions of the 
Code, Treasury Regulations, the legislative history of the Code, existing 
administrative rulings and practices of the Service, and judicial decisions. 
No assurance can be given that future legislative, judicial or 
administrative actions or decisions, which may be retroactive in effect, will 
not affect the accuracy of any statements in this Prospectus Supplement with 
respect to the transactions entered into or contemplated prior to the 
effective date of such changes. 

   EACH INVESTOR IS ADVISED TO CONSULT HIS OR HER OWN TAX ADVISOR REGARDING 
THE SPECIFIC TAX CONSEQUENCES TO HIM OR HER OF AN INVESTMENT IN THE COMMON 
STOCK. 

Taxation of Taxable U.S. Shareholders 

As long as the Company qualifies as a REIT, distributions made to the 
Company's taxable U.S. shareholders out of current or accumulated earnings 
and profits (and not designated as capital gain dividends) will be taken into 
account by such U.S. shareholders as ordinary income and will not be eligible 
for the dividends received deduction generally available to corporations. As 
used herein, the term "U.S. shareholder" means a holder of Common Stock that 
for U.S. federal income tax purposes is (i) a citizen or resident of the 
United States, (ii) a corporation, partnership, or other entity created or 
organized in or under the laws of the United States or of any political 
subdivision thereof, (iii) an estate, the income of which is subject to 
United States federal income taxation regardless of its source, or (iv) a 
trust, if a court within the United States is able to exercise primary 
supervision over the administration of the trust and one or more United 
States fiduciaries have the authority to control all substantial decisions of 
the trust, and that (v) is not an entity that has special status under the Code
(such as a tax-exempt organization.) Distributions that are designated as 
capital gain dividends will be taxed as long-term capital gains (to the 
extent they do not exceed the Company's actual net capital gain for the 
taxable year) without regard to the period for which the shareholder has held 
his Common Stock. However, corporate shareholders may be required to treat up 
to 20% of certain capital gain dividends as ordinary income. Distributions in 
excess of current and accumulated earnings and profits will not be taxable to 
a shareholder to the extent that they do not exceed the adjusted basis of the 
shareholder's Common Stock, but rather will reduce the adjusted basis of such 
stock. To the extent that such distributions in excess of current and 
accumulated earnings and profits exceed the adjusted basis of a shareholder's 
Common Stock, such distributions will be included in income as long-term 
capital gain (or short-term capital gain if the shares of Common Stock have 
been held for one year or less) assuming the shares of Common Stock are a 
capital asset in the hands of the shareholder. In addition, any distribution 
declared by the Company in October, November, or December of any year and 
payable to a shareholder of record on a specified date in any such month 
shall be treated as both paid by the Company and received by the shareholder 
on December 31 of such year, provided that the distribution is actually paid 
by the Company during January of the following calendar year. 

   Shareholders may not include in their individual income tax returns any 
net operating losses or capital losses of the Company. Instead, such losses 
would be carried over by the Company for potential offset against its future 
income (subject to certain limitations). Taxable distributions from the 
Company and gain from the disposition of Common Stock will not be treated 
as passive activity income and, therefore, shareholders generally will not be 
able to apply any "passive activity losses" (such as losses from certain 
types of limited partnerships in which the shareholder is a limited partner) 
against such income. In addition, taxable distributions from the Company 
generally will be treated as investment income for purposes of the investment 
interest limitations. Capital gains from the disposition of shares of Common 
Stock (or distributions treated as such) will be treated as investment income 
only if the shareholder so elects, in which case such capital gains will be 
taxed at ordinary income rates. The Company will notify shareholders after 
the close of the Company's taxable year as to the portions of the 
distributions attributable to that year that constitute ordinary income, 
return of capital, and capital gain. 

Taxation of Shareholders on the Disposition of the Securities 

In general, any gain or loss realized upon a taxable disposition of the 
shares of Common Stock by a shareholder who is not a dealer in securities 
will be treated as long-term capital gain or loss if the shares of Common 
Stock have been held for more than one year and otherwise as short-term 
capital gain or loss. However, any loss upon a sale or exchange of shares of 
Common Stock by a shareholder who has held such stock 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 from the Company required to be 
treated by such shareholder as long-term capital gain. All or a portion of 
any loss realized upon a taxable disposition of 


                                      S-71
<PAGE> 


shares of Common Stock may be disallowed if other shares of Common Stock 
are purchased within 30 days before or after the disposition. 

Information Reporting Requirements and Backup Withholding 

The Company will report to its U.S. shareholders and the Service the amount 
of distributions paid during each calendar year, and the amount of tax 
withheld, if any. Under the backup withholding rules, a shareholder may be 
subject to backup withholding at the rate of 31% with respect to 
distributions paid unless such holder (i) is a corporation or comes within 
certain other exempt categories and, when required, demonstrates this fact, 
or (ii) provides a taxpayer identification number, certifies as to no loss of 
exemption from backup withholding, and otherwise complies with the applicable 
requirements of the backup withholding rules. A shareholder who does not 
provide the Company with his correct taxpayer identification number also may 
be subject to penalties imposed by the Service. Any amount paid as backup 
withholding will be creditable against the shareholder's income tax 
liability. In addition, the Company may be required to withhold a portion of 
capital gain distributions to any shareholders who fail to certify their 
nonforeign status to the Company. The Service issued proposed regulations in 
April 1996 regarding the backup withholding rules. These proposed regulations 
would alter the current system of backup withholding compliance. 

Taxation of Tax-Exempt Shareholders 

Tax-exempt entities, including qualified employee pension and profit sharing
trusts and individual retirement accounts ("Exempt Organizations"), generally
are exempt from federal income taxation. However, they are subject to taxation
on their unrelated business taxable income ("UBTI"). While many investments in
real estate generate UBTI, amounts distributed by the Company to an Exempt
Organization generally should not constitute UBTI. However, if any Exempt
Organization finances its acquisition of Common Stock with debt, a portion of
its income from the Company will constitute UBTI pursuant to the "debt-financed
property" rules. Furthermore, social clubs, voluntary employee benefit
associations, supplemental unemployment benefit trusts, and qualified group
legal services plans that are exempt from taxation under paragraphs (7), (9),
(17), and (20), respectively, of Code section 501(c) are subject to different
UBTI rules, which generally will require them to characterize distributions from
the Company as UBTI. In addition, in certain circumstances, a pension trust that
owns more than 10% of the Company's stock is required to treat a percentage of
the dividends from the Company as UBTI (the "UBTI Percentage"). The UBTI
Percentage is the gross income derived by the Company from an unrelated trade or
business (determined as if the Company were a pension trust) divided by the
gross income of the Company for the year in which the dividends are paid. The
UBTI rules applies to a pension trust holding more than 10% of the Company's
stock only if (i) the UBTI Percentage is at least 5%, (ii) the Company qualifies
as a REIT by reason of the modification of the 5/50 Rule that allows the
beneficiaries of the pension trust to be treated as holding stock of the Company
in proportion to their actuarial interests in the pension trust, and (iii)
either (A) one pension trust owns more than 25% of the value of the Company's
stock or (B) a group of pension trusts individually holding more than 10% of the
value of the Company's stock collectively own more than 50% of the value of the
Company's stock.

   Investors are urged to consult their own tax advisors with respect to the 
appropriateness of an investment in the Securities offered hereby and with 
respect to the tax consequences arising under federal law and the laws of any 
state, municipality or other taxing jurisdiction, including tax consequences 
resulting from such investor's own tax characteristics. In particular, 
foreign investors should consult their own tax advisors concerning the tax 
consequences of an investment in the Company, including the possibility of 
United States income tax withholding on Company distributions. 



                                      S-72

<PAGE>


                                 UNDERWRITING 

   Subject to the terms and conditions in the terms agreement and related 
underwriting agreement (collectively, the "Underwriting Agreement") among the 
Company and each of the underwriters named below (the "Underwriters"), the 
Company has agreed to sell to each of the Underwriters, for whom Merrill 
Lynch, Pierce, Fenner & Smith Incorporated ("Merrill Lynch"), Dean Witter 
Reynolds Inc., Donaldson, Lufkin & Jenrette Securities Corporation, Lehman 
Brothers Inc., Raymond James & Associates, Inc. and Smith Barney Inc. are 
acting as representatives (the "Representatives"), and each of the 
Underwriters has severally agreed to purchase from the Company the respective 
number of shares of Common Stock set forth opposite their respective names. 

                                                                 Number of 
          Underwriter                                             Shares 
                                                               ----------- 
     Merrill Lynch, Pierce, Fenner & Smith 
          Incorporated 
     Dean Witter Reynolds Inc. 
     Donaldson, Lufkin & Jenrette Securities Corporation 
     Lehman Brothers Inc. 
     Raymond James & Associates, Inc. 
     Smith Barney Inc. 

                                                               ----------- 
           Total                                                7,000,000 
                                                               =========== 

   In the Underwriting Agreement, the several Underwriters have agreed, 
respectively, subject to the terms and conditions set forth in the 
Underwriting Agreement, to purchase all of the shares of Common Stock being 
sold pursuant to the Underwriting Agreement if any of such shares of Common 
Stock are purchased. Under certain circumstances, the commitments of 
non-defaulting Underwriters may be increased. 

   The Representatives have advised the Company that the Underwriters propose 
initially to offer the Common Stock to the public at the public offering 
price set forth on the cover page of this Prospectus Supplement and to 
certain dealers at such price less a concession not in excess of $    per 
share. The Underwriters may allow, and such dealers may reallow, a discount 
not in excess of $    per share on sales to certain other dealers. After the 
initial public offering, the public offering price, concession and discount 
may be changed. 

   The Company has granted to the Underwriters an option, exercisable for 30 
days after the date of this Prospectus Supplement, to purchase up to 
1,050,000 additional shares of Common Stock to cover over-allotments, if any, 
at the initial public offering price, less the underwriting discount set 
forth on the cover page of this Prospectus Supplement. If the Underwriters 
exercise this option, each Underwriter will have a firm commitment, subject 
to certain conditions, to purchase approximately the same percentage thereof 
which the number of shares of Common Stock to be purchased by it shown in the 
foregoing table bears to the shares of Common Stock initially offered hereby. 


   In the Underwriting Agreement, the Company has agreed to indemnify the 
Underwriters against certain liabilities, including liabilities under the 
Securities Act. Insofar as indemnification of the Underwriters for 
liabilities arising under the Securities Act may be permitted pursuant to the 
foregoing provisions, the Company has been informed that in the opinion of 
the Securities and Exchange Commission (the "Commission") such 
indemnification is against public policy as expressed in the Securities Act 
and is therefore unenforceable. 


   The Company and the Operating Partnership have agreed that for a period of 
90 days from the date of this Prospectus Supplement they will not, subject to 
certain exceptions, without the prior written consent of Merrill Lynch, 
directly or indirectly, sell, offer or contract to sell, grant any option for 
the sale of, or otherwise dispose of any shares of Common Stock or Units or 
any security convertible into or exercisable for shares of Common Stock or 
Units. 


   The Common Stock is listed on the NYSE under the symbol "BCN." 


                                     

                                      S-73
<PAGE>


   In connection with the Offering, the rules of the Commission permit the 
Representatives to engage in certain transactions that stabilize the price of 
the Common Stock. Such transactions consist of bids or purchases for the 
purpose of pegging, fixing or maintaining the price of the Common Stock. 

   If the Underwriters create a short position in the Common Stock in 
connection with the Offering, i.e., if they sell more shares of Common Stock 
than are set forth on the cover page of this Prospectus Supplement, the 
Representatives may reduce that short position by purchasing Common Stock in 
the open market. The Representatives may also elect to reduce any short 
position by exercising all or part of the over-allotment option described 
above. 

   The Representatives may also impose a penalty bid on certain Underwriters 
and selling group members. This means that if the Representatives purchase 
shares of Common Stock in the open market to reduce the Underwriters' short 
position or to stabilize the price of the Common Stock, they may reclaim the 
amount of the selling concession from the Underwriters and selling group 
members who sold those shares as part of the Offering. 

   In general, purchases of a security for the purpose of stabilization or to 
reduce a short position could cause the price of the security to be higher 
than it might be in the absence of such purchases. The imposition of a 
penalty bid might also have an effect on the price of a security to the 
extent that it were to discourage resales of the security. 

   Neither the Company nor any of the Underwriters makes any representation 
or prediction as to the direction or magnitude of any effect that the 
transactions described above may have on the price of the Common Stock. In 
addition, neither the Company nor any of the Underwriters makes any 
representation that the Representatives will engage in such transactions or 
that such transactions, once commenced, will not be discontinued without 
notice. 



                                     

                                      S-74
<PAGE>


                                LEGAL MATTERS 


   Certain legal matters will be passed upon for the Company by Goodwin, 
Procter & Hoar LLP, Boston, Massachusetts, a limited liability partnership 
including professional corporations, as corporate, securities, real estate 
and tax counsel to the Company, and by Goulston & Storrs, P.C., Boston, 
Massachusetts, as real estate counsel to the Company. Gilbert G. Menna, whose 
professional corporation is a partner of Goodwin, Procter & Hoar LLP, is an 
assistant secretary of the Company and owns in excess of 1,000 shares of the 
Company's Common Stock. Certain legal matters related to the Offering will be 
passed upon for the Underwriters by Brown & Wood LLP, New York, New York. 
Brown & Wood LLP will rely on Goodwin, Procter & Hoar LLP, as to certain 
matters of Maryland law. 



                                     

                                      S-75
<PAGE>


   
        SUBJECT TO COMPLETION, PRELIMINARY PROSPECTUS DATED APRIL 7, 1997
    

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 nor 
the solicitation of an offer to buy nor shall there be 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. 



                                  PROSPECTUS 

                                 $600,000,000 
                        Beacon Properties Corporation 
                               PREFERRED STOCK 
                                 COMMON STOCK 


                                 $400,000,000 
                           Beacon Properties, L.P. 
                               DEBT SECURITIES 


   Beacon Properties Corporation (together with its subsidiaries, the 
"Company") may offer from time to time in one or more series (i) shares of 
its preferred stock, $.01 par value per share ("Preferred Stock") and (ii) 
shares of its common stock, $.01 par value per share ("Common Stock"). Beacon 
Properties, L.P. (the "Operating Partnership") may offer from time to time in 
one or more series unsecured non-convertible investment grade debt securities 
(the "Debt Securities"). The aggregate public offering price of the Preferred 
Stock and the Common Stock shall be up to $600,000,000 (or its equivalent in 
another currency based on the exchange rate at the time of sale) and the 
aggregate public offering price of the Debt Securities (collectively with the 
Preferred Stock and the Common Stock, the "Securities") shall be up to 
$400,000,000 (or its equivalent in another currency based on the exchange 
rate at the time of sale). The Securities will be issued in amounts, at 
prices and on terms to be determined at the time of offering. The Securities 
may be offered separately or together, in separate series, in amounts, at 
prices and on terms to be set forth in one or more supplements to this 
Prospectus (each a "Prospectus Supplement"). 

   The specific terms of the Securities for which this Prospectus is being 
delivered will be set forth in the applicable Prospectus Supplement and will 
include, where applicable: (i) in the case of Preferred Stock, the specific 
designation and stated value per share, any dividend, liquidation, 
redemption, conversion, voting and other rights, and any initial public 
offering price; (ii) in the case of Common Stock, any initial public offering 
price; and (iii) in the case of Debt Securities, the specific title, 
aggregate principal amount, ranking, currency, form (which may be registered 
or bearer, or certificated or global), authorized denominations, maturity, 
rate (or manner of calculation thereof) and time of payment of interest, 
terms for redemption at the option of the Operating Partnership or repayment 
at the option of the holder, terms for sinking fund payments, covenants and 
any initial public offering price. In addition, such specific terms may 
include limitations on direct or beneficial ownership and restrictions on 
transfer of the Securities, in each case as may be consistent with the 
Company's Articles of Incorporation, as then in effect, or otherwise 
appropriate to preserve the status of the Company as a real estate investment 
trust ("REIT") for federal income tax purposes. See "Restrictions on 
Transfers of Capital Stock." 


   The applicable Prospectus Supplement will also contain information, where
appropriate, about material United States federal income tax considerations
relating to, and any listing on a securities exchange of, the Securities covered
by such Prospectus Supplement.


   The Securities may be offered by the Company or the Operating Partnership 
directly to one or more purchasers, through agents designated from time to 
time by the Company or the Operating Partnership, or to or through 
underwriters or dealers. If any agents or underwriters are involved in the 
sale of any of the Securities, their names, and any applicable purchase 
price, fee, commission or discount arrangement between or among them, will be 
set forth, or will be calculable from the information set forth, in an 
accompanying Prospectus Supplement. See "Plan of Distribution." No Securities 
may be sold without delivery of a Prospectus Supplement describing the method 
and terms of the offering of such Securities. 

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

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. 

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


                   The date of this Prospectus is April, 1997.



<PAGE> 

                            AVAILABLE INFORMATION 

   The Company and the Operating Partnership have filed with the Securities 
and Exchange Commission (the "SEC" or "Commission") a registration statement 
on Form S-3 (the "Registration Statement") under the Securities Act of 1933, 
as amended (the "Securities Act"), with respect to the Securities offered 
hereby. This Prospectus, which constitutes part of the Registration 
Statement, omits certain of the information contained in the Registration 
Statement and the exhibits thereto on file with the Commission pursuant to 
the Securities Act and the rules and regulations of the Commission 
thereunder. The Registration Statement, including exhibits thereto, may be 
inspected and copied at the public reference facilities maintained by the 
Commission at 450 Fifth Street, N.W., Room 1024, Washington, D.C. 20549, and 
at the Commission's Regional Offices at 7 World Trade Center, 13th Floor, New 
York, New York 10048, and Citicorp Center, 500 West Madison Street, Suite 
1400, Chicago, Illinois 60661-2511, and copies may be obtained at the 
prescribed rates from the Public Reference Section of the Commission at its 
principal office in Washington, D.C. The Commission also maintains a Web site 
at http://www.sec.gov containing reports, proxy and information statements 
and other information regarding registrants, including the Company, that file 
electronically with the Commission. Statements contained in this Prospectus 
as to the contents of any contract or other document referred to 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. 

   The Company is subject to the informational requirements of the Securities 
Exchange Act of 1934, as amended (the "Exchange Act"), and in accordance 
therewith files reports and proxy statements and other information with the 
Commission. Such reports, proxy statements and other information can be 
inspected and copied at the locations described above. Copies of such 
materials can be obtained by mail from the Public Reference Section of the 
Commission at 450 Fifth Street, N.W., Room 1024, Washington, D.C. 20549, at 
prescribed rates. In addition, the Common Stock is listed on the New York 
Stock Exchange (the "NYSE"), and such materials can be inspected and copied 
at the NYSE, 20 Broad Street, New York, New York 10005. 

               INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE 

   The following documents are incorporated herein by reference: 


   1. The Company's Annual Report on Form 10-K for the year ended December 
31, 1996, filed with the Commission pursuant to the Exchange Act. 

   
   2. The Company's Current Reports on Form 8-K dated January 5, 1996, February
20, 1996, July 23, 1996, October 18, 1996, December 20, 1996 and March 27, 1997
filed with the Commission pursuant to the Exchange Act, including all amendments
thereto. 
    

   3. The description of the Company's Common Stock contained in its 
Registration Statement on Form 8-A filed with the Commission pursuant to the 
Exchange Act, including all amendments and reports updating such description. 

   4. The Operating Partnership's Registration Statement on Form 10 filed 
with the Commission pursuant to the Exchange Act, including all amendments 
and reports updating such description. 


   All other documents filed with the Commission by the Company or the 
Operating Partnership pursuant to Section 13(a), 13(c), 14 or 15(d) of the 
Exchange Act subsequent to the date of this Prospectus and prior to the 
termination of the offering of the Securities are to be incorporated herein 
by reference and such documents shall be deemed to be a part hereof from the 
date of filing of such documents. Any person receiving a copy of this 
Prospectus may obtain, without charge, upon request, a copy of any of the 
documents incorporated by reference herein (except for the exhibits to such 
documents, unless such exhibits are specifically incorporated by reference 
into such documents). Written requests for such copies should be mailed to 
Kathleen M. McCarthy, Beacon Properties Corporation, 50 Rowes Wharf, Boston, 
Massachusetts 02110. Telephone requests may be directed to Ms. McCarthy at 
(617) 330-1400. 

                                      2 

<PAGE> 

   Any statement contained in a document incorporated or deemed to be 
incorporated by reference shall be deemed to be modified or superseded for 
purposes of this Prospectus to the extent that a statement contained herein 
or in any other subsequently filed document that also is or is deemed to be 
incorporated by reference herein modifies or supersedes such statement. Any 
statement so modified or superseded shall not be deemed, except as so 
modified or superseded, to constitute a part of this Prospectus. 

                  THE COMPANY AND THE OPERATING PARTNERSHIP 

   Beacon Properties Corporation is a self-administered and self-managed real 
estate investment trust ("REIT") which owns a portfolio of Class A office 
properties and other commercial properties (collectively, the "Properties") 
located in major metropolitan areas, including Boston, Atlanta, Chicago, Los 
Angeles, San Francisco and Washington, D.C., as well as commercial real 
estate development, acquisition, leasing, design and management businesses. 
The Company is a Maryland corporation and its Common Stock is listed on the 
New York Stock Exchange under the symbol "BCN." 

   The Company's business is conducted principally through subsidiaries which 
consist of the Operating Partnership, two subsidiary corporations and two 
subsidiary limited partnerships. The Operating Partnership is a Delaware 
limited partnership, of which the Company is the sole general partner. The 
Company conducts third-party management operations through Beacon Property 
Management Corporation, a Delaware corporation (the "Management Company"), 
and conducts third-party tenant space design services through Beacon Design 
Corporation, a Massachusetts corporation (the "Design Company"). The Company 
conducts management operations for wholly-owned properties through Beacon 
Property Management, L.P., a Delaware limited partnership (the "Management 
Partnership"), and conducts tenant space design services for wholly-owned 
properties through Beacon Design, L.P., a Delaware limited partnership (the 
"Design Partnership"). 


   Currently, the Company's and the Operating Partnership's total 
consolidated outstanding debt were approximately $604.8 million and $604.8 
million, respectively, and their total consolidated debt plus their 
proportionate share of total unconsolidated debt (other than the Rowes Wharf 
Property debt) were approximately $697.5 million and $696.8 million, 
respectively. 


   The Company's executive offices are located at 50 Rowes Wharf in Boston, 
Massachusetts 02110 and its telephone number at that location is 
617-330-1400. 

                               USE OF PROCEEDS 

   The Company is required by the terms of the partnership agreement of the 
Operating Partnership, to invest the net proceeds of any sale of Common Stock 
or Preferred Stock in the Operating Partnership in exchange for additional 
Units or preferred Units, as the case may be. As will be more fully described 
in the applicable Prospectus Supplement, the Company and the Operating 
Partnership intend to use the net proceeds from the sale of Securities for 
general corporate purposes, including repayment of indebtedness, investment 
in new properties and new developments and maintenance of currently owned 
properties. 

                     RATIOS OF EARNINGS TO FIXED CHARGES 

   The following table sets forth the consolidated ratios of earnings to 
fixed charges for the Company and the Operating Partnership for the years 
ended December 31, 1996 and 1995 and for the period May 26, 1994 to December 
31, 1994, and for The Beacon Group, the predecessor to the Company and the 
Operating Partnership (the "Predecessor"), for the period January 1, 1994 to 
May 25, 1994 and for the years ended December 31, 1993 and 1992. 

<TABLE>

<CAPTION>
                                         For the Period      For the Period 
    Year Ended          Year Ended       May 26, 1994 to   January 1, 1994 to     Year Ended          Year Ended 
 December 31, 1996   December 31, 1995  December 31, 1994     May 25, 1994     December 31, 1993  December 31, 1992 
 ------------------  ------------------ ------------------ ------------------  ------------------ ------------------ 
       <S>                 <C>                <C>                 <C>                <C>                 <C>  
       2.19                2.02               1.62                1.07               0.72                0.84 
</TABLE>


   The ratios of earnings to fixed charges were computed by dividing earnings 
by fixed charges. For this purpose, earnings consist of pre-tax income from 
continuing operations plus fixed charges. Fixed charges consist of interest 
expense, rent expense, and the amortization of debt issuance costs. To date, 
the Company has not issued any Preferred Stock; therefore, the ratios of 
earnings to combined fixed charges and preferred stock dividend requirements 
are the same as the ratios of earnings to fixed charges presented above. 

                                      3 

<PAGE> 

                        DESCRIPTION OF DEBT SECURITIES 

General 

   The Company conducts substantially all of its business, and indirectly 
holds substantially all of its interests in the Properties, through the 
Operating Partnership. Consequently, the Operating Partnership, and not the 
Company, will issue the Debt Securities. The Debt Securities will be direct 
unsecured obligations of the Operating Partnership and may be either senior 
Debt Securities ("Senior Securities") or subordinated Debt Securities 
("Subordinated Securities"). The Debt Securities will be issued under one or 
more indentures, each dated as of a date prior to the issuance of the Debt 
Securities to which it relates. Senior Securities and Subordinated Securities 
may be issued pursuant to separate indentures (respectively, a "Senior 
Indenture" and a "Subordinated Indenture"), in each case between the 
Operating Partnership and a trustee (a "Trustee"), which may be the same 
Trustee, and in the form that has been filed as an exhibit to the 
Registration Statement of which this Prospectus is a part, subject to such 
amendments or supplements as may be adopted from time to time. The Senior 
Indenture and the Subordinated Indenture, as amended or supplemented from 
time to time, are sometimes hereinafter referred to collectively as the 
"Indentures." The Indentures will be subject to and governed by the Trust 
Indenture Act of 1939, as amended (the "TIA"). The statements made under this 
heading relating to the Debt Securities and the Indentures are summaries of 
the anticipated material provisions thereof, do not purport to be complete 
and are qualified in their entirety by reference to the Indentures and such 
Debt Securities. 

   Capitalized terms used herein and not defined shall have the meanings 
assigned to them in the applicable Indenture. 

Terms 

   The indebtedness represented by the Senior Securities will rank equally 
with all other unsecured and unsubordinated indebtedness of the Operating 
Partnership. The indebtedness represented by Subordinated Securities will be 
subordinated in right of payment to the prior payment in full of the Senior 
Debt of the Operating Partnership as described under "--Subordination." The 
particular terms of the Debt Securities offered by a Prospectus Supplement 
will be described in the applicable Prospectus Supplement, along with any 
applicable modifications of or additions to the general terms of the Debt 
Securities as described herein and in the applicable Indenture and any 
applicable federal income tax considerations. Accordingly, for a description 
of the terms of any series of Debt Securities, reference must be made to both 
the Prospectus Supplement relating thereto and the description of the Debt 
Securities set forth in this Prospectus. 

   Except as set forth in any Prospectus Supplement, the Debt Securities may 
be issued without limit as to aggregate principal amount, in one or more 
series, in each case as established from time to time by the Operating 
Partnership or as set forth in the applicable Indenture or in one or more 
indentures supplemental to such Indenture. All Debt Securities of one series 
need not be issued at the same time and, unless otherwise provided, a series 
may be reopened, without the consent of the holders of the Debt Securities of 
such series, for issuance of additional Debt Securities of such series. 

   Each Indenture will provide that the Operating Partnership may, but need 
not, designate more than one Trustee thereunder, each with respect to one or 
more series of Debt Securities. Any Trustee under an Indenture may resign or 
be removed with respect to one or more series of Debt Securities and a 
successor Trustee may be appointed to act with respect to such series. In the 
event that two or more persons are acting as Trustee with respect to 
different series of Debt Securities, each such Trustee shall be a Trustee of 
a trust under the applicable Indenture separate and apart from the trust 
administered by any other Trustee, and, except as otherwise indicated herein, 
any action described herein to be taken by each Trustee may be taken by each 
such Trustee with respect to, and only with respect to, the one or more 
series of Debt Securities for which it is Trustee under the applicable 
Indenture. 

   The following summaries set forth certain general terms and provisions of 
the Indentures and the Debt Securities. The Prospectus Supplement relating to 
the series of Debt Securities being offered will contain further terms of 
such Debt Securities, including the following specific terms: 

    (1) The title of such Debt Securities and whether such Debt Securities 
        are Senior Securities or Subordinated Securities; 

    (2) The aggregate principal amount of such Debt Securities and any limit 
        on such aggregate principal amount; 

                                      4 

<PAGE> 

    (3) The price (expressed as a percentage of the principal amount thereof) 
        at which such Debt Securities will be issued and, if other than the 
        principal amount thereof, the portion of the principal amount thereof 
        payable upon declaration of acceleration of the maturity thereof; 

    (4) The date or dates, or the method for determining such date or dates, 
        on which the principal of such Debt Securities will be payable; 

    (5) The rate or rates (which may be fixed or variable), or the method by 
        which such rate or rates shall be determined, at which such Debt 
        Securities will bear interest, if any; 

    (6) The date or dates, or the method for determining such date or dates, 
        from which any such interest will accrue, the dates on which any such 
        interest will be payable, the record dates for such interest payment 
        dates, or the method by which such dates shall be determined, the 
        persons to whom such interest shall be payable, and the basis upon 
        which interest shall be calculated if other than that of a 360-day 
        year of twelve 30-day months; 

    (7) The place or places where the principal of (and premium, if any) and 
        interest, if any, on such Debt Securities will be payable, where such 
        Debt Securities may be surrendered for conversion or registration of 
        transfer or exchange and where notices or demands to or upon the 
        Operating Partnership in respect of such Debt Securities and the 
        applicable Indenture may be served; 

    (8) The period or periods, if any, within which, the price or prices at 
        which and the other terms and conditions upon which such Debt 
        Securities may, pursuant to any optional or mandatory redemption 
        provisions, be redeemed, as a whole or in part, at the option of the 
        Operating Partnership; 

    (9) The obligation, if any, of the Operating Partnership to redeem, repay 
        or purchase such Debt Securities pursuant to any sinking fund or 
        analogous provision or at the option of a holder thereof, and the 
        period or periods within which, the price or prices at which and the 
        other terms and conditions upon which such Debt Securities will be 
        redeemed, repaid or purchased, as a whole or in part, pursuant to 
        such obligation; 

   (10) If other than U.S. dollars, the currency or currencies in which such 
        Debt Securities are denominated and payable, which may be a foreign 
        currency or units of two or more foreign currencies or a composite 
        currency or currencies, and the terms and conditions relating 
        thereto; 

   (11) Whether the amount of payments of principal of (and premium, if any) 
        or interest, if any, on such Debt Securities may be determined with 
        reference to an index, formula or other method (which index, formula 
        or method may, but need not be, based on a currency, currencies, 
        currency unit or units, or composite currency or currencies) and the 
        manner in which such amounts shall be determined; 

   (12) Whether such Debt Securities will be issued in certificated or 
        book-entry form and, if in book entry form, the identity of the 
        depository for such Debt Securities; 

   (13) Whether such Debt Securities will be in registered or bearer form 
        and, if in registered form, the denominations thereof if other than 
        $1,000 and any integral multiple thereof and, if in bearer form, the 
        denominations thereof and terms and conditions relating thereto; 

   (14) The applicability, if any, of the defeasance and covenant defeasance 
        provisions described herein or set forth in the applicable Indenture, 
        or any modification thereof; 

   (15) Whether and under what circumstances the Operating Partnership will 
        pay any additional amounts on such Debt Securities in respect of any 
        tax, assessment or governmental charge and, if so, whether the 
        Company will have the option to redeem such Debt Securities in lieu 
        of making such payment; 

   (16) Any deletions from, modifications of or additions to the events of 
        default or covenants of the Operating Partnership, to the extent 
        different from those described herein or set forth in the applicable 
        Indenture with respect to such Debt Securities, and any change in the 
        right of any Trustee or any of the holders to declare the principal 
        amount of any of such Debt Securities due and payable; 

   (17) With respect to any Debt Securities that provide for optional 
        redemption or prepayment upon the occurrence of certain events (such 
        as a change of control of the Operating Partnership), (i) the 
        possible effects of such provisions on the market price of the 
        Operating Partnership's or the Company's securities 

                                      5 

<PAGE> 

        or in deterring certain mergers, tender offers or other takeover 
        attempts, and the intention of the Operating Partnership to comply 
        with the requirements of Rule 14e-1 under the Exchange Act and any 
        other applicable securities laws in connection with such provisions; 
        (ii) whether the occurrence of the specified events may give rise to 
        cross-defaults on other indebtedness such that payment on such Debt 
        Securities may be effectively subordinated; and (iii) the existence 
        of any limitation on the Operating Partnership's financial or legal 
        ability to repurchase such Debt Securities upon the occurrence of 
        such an event (including, if true, the lack of assurance that such a 
        repurchase can be effected) and the impact, if any, under the 
        Indenture of such a failure, including whether and under what 
        circumstances such a failure may constitute an Event of Default; and 

   (18) Any other terms of such Debt Securities not inconsistent with the 
        provisions of the applicable Indenture. 

   If so provided in the applicable Prospectus Supplement, the Debt 
Securities may be issued at a discount below their principal amount and 
provide for less than the entire principal amount thereof to be payable upon 
declaration of acceleration of the maturity thereof ("Original Issue Discount 
Securities"). In such cases, any special U.S. federal income tax, accounting 
and other considerations applicable to Original Issue Discount Securities 
will be described in the applicable Prospectus Supplement. 

   
    Except as described under "Merger, Consolidation or Sale of Assets" or as
may be set forth in any Prospectus Supplement, the Debt Securities will not
contain any provisions that would limit the ability of the Operating Partnership
to incur indebtedness or that would afford holders of Debt Securities protection
in the event of (i) a highly leveraged or similar transaction involving the
Operating Partnership, the management of the Operating Partnership or the
Company, or any affiliate of any such party, (ii) a change of control, or (iii)
a reorganization, restructuring, merger or similar transaction involving the
Operating Partnership that may adversely affect the holders of the Debt
Securities. In addition, subject to the limitations set forth under "Merger,
Consolidation or Sale of Assets," the Operating Partnership may, in the future,
enter into certain transactions, such as the sale of all or substantially all of
its assets or the merger or consolidation of the Operating Partnership, that
would increase the amount of the Operating Partnership's indebtedness or
substantially reduce or eliminate the Operating Partnership's indebtedness or
substantially reduce or eliminate the Operating Partnership's assets, which may
have an adverse effect on the Operating Partnership's ability to service its
indebtedness, including the Debt Securities. Neither Maryland General
Corporation Law nor the governing instruments of the Company and the Operating
Partnership define the term "substantially all" in connection with the sale of
assets. Additionally, Maryland cases interpreting the words "substantially all"
all rely heavily upon the facts and circumstances of the particular case. As a
consequence of the lack of a definition of the term "substantially all," a
holder of Debt Securities must review the financial and other information
disclosed by the Operating Partnership to the public to determine whether a sale
of "substantially all" of the assets of the Operating Partnership has occurred.
Restrictions on ownership and transfers of the Common Stock and Preferred Stock
are designed to preserve the Company's status as a REIT and, therefore, may act
to prevent or hinder a change of control. See "Description of Common Stock" and
"Restrictions on Transfers of Capital Stock." Reference is made to the
applicable Prospectus Supplement for information with respect to any deletions
from, modifications of, or additions to, the events of default or covenants that
are described below, including any addition of a covenant or other provision
providing event risk or similar protection.
    

Denomination, Interest, Registration and Transfer 
Unless otherwise described in the applicable Prospectus Supplement, the Debt 
Securities of any series will be issuable in denominations of $1,000 and 
integral multiples thereof. 

   Subject to certain limitations imposed upon Debt Securities issued in 
book-entry form, the Debt Securities of any series will be exchangeable for 
any authorized denomination of other Debt Securities of the same series and 
of a like aggregate principal amount and tenor upon surrender of such Debt 
Securities at the corporate trust office of the applicable Trustee or at the 
office of any transfer agent designated by the Operating Partnership for such 
purpose. In addition, subject to certain limitations imposed upon Debt 
Securities issued in book-entry form, the Debt Securities of any series may 
be surrendered for registration of transfer or exchange thereof at the 
corporate trust office of the applicable Trustee or at the office of any 
transfer agent designated by the Operating Partnership for such purpose. 
Every Debt Security surrendered for registration of transfer or exchange must 
be duly endorsed or accompanied by a written instrument of transfer, and the 
person requesting such action must provide evidence of title and identity 
satisfactory to the applicable Trustee or transfer agent. No service charge 
will be made for any 

                                      6 

<PAGE> 

registration of transfer or exchange of any Debt Securities, but the Trustee 
or the Operating Partnership may require payment of a sum sufficient to cover 
any tax or other governmental charge payable in connection therewith. If the 
applicable Prospectus Supplement refers to any transfer agent (in addition to 
the applicable Trustee) initially designated by the Operating Partnership 
with respect to any series of Debt Securities, the Operating Partnership may 
at any time rescind the designation of any such transfer agent or approve a 
change in the location through which any such transfer agent acts, except 
that the Operating Partnership will be required to maintain a transfer agent 
in each place of payment for such series. The Operating Partnership may at 
any time designate additional transfer agents with respect to any series of 
Debt Securities. 

   Neither the Operating Partnership nor any Trustee shall be required (i) to 
issue, register the transfer of or exchange Debt Securities of any series 
during a period beginning at the opening of business 15 days before the day 
of mailing of a notice of redemption of any Debt Securities that may be 
selected for redemption and ending at the close of business on the day of 
such mailing; (ii) to register the transfer of or exchange any Debt Security, 
or portion thereof, so selected for redemption, in whole or in part, except 
the unredeemed portion of any Debt Security being redeemed in part; or (iii) 
to issue, register the transfer of or exchange any Debt Security that has 
been surrendered for repayment at the option of the holder, except the 
portion, if any, of such Debt Security not to be so repaid. 

Merger, Consolidation or Sale of Assets 

   The Indentures will provide that the Operating Partnership may, without 
the consent of the holders of any outstanding Debt Securities, consolidate 
with, or sell, lease or convey all or substantially all of its assets to, or 
merge with or into, any other entity provided that (i) either the Operating 
Partnership shall be the continuing entity, or the successor entity (if other 
than the Operating Partnership) formed by or resulting from any such 
consolidation or merger or which shall have received the transfer of such 
assets, shall expressly assume (A) the Operating Partnership's obligations to 
pay principal of (and premium, if any) and interest on all of the Debt 
Securities and (B) the due and punctual performance and observance of all of 
the covenants and conditions contained in each Indenture; (ii) immediately 
after giving effect to such transaction and treating any indebtedness that 
becomes an obligation of the Operating Partnership or any subsidiary as a 
result thereof as having been incurred by the Operating Partnership or such 
subsidiary at the time of such transaction, no event of default under the 
Indentures, and no event which, after notice or the lapse of time, or both, 
would become such an event of default, shall have occurred and be continuing; 
and (iii) an officers' certificate and legal opinion covering such conditions 
shall be delivered to each Trustee. 

Certain Covenants 

   Existence. Except as permitted under "--Merger, Consolidation or Sale of 
Assets," the Indentures will require the Operating Partnership to do or cause 
to be done all things necessary to preserve and keep in full force and effect 
its existence, rights and franchises; provided, however, that the Operating 
Partnership shall not be required to preserve any right or franchise if it 
determines that the preservation thereof is no longer desirable in the 
conduct of its business. 

   Maintenance of Properties. The Indentures will require the Operating 
Partnership to cause all of its material properties used or useful in the 
conduct of its business or the business of any subsidiary to be maintained 
and kept in good condition, repair and working order and supplied with all 
necessary equipment and will cause to be made all necessary repairs, 
renewals, replacements, betterments and improvements thereof, all as in the 
judgment of the Operating Partnership may be necessary so that the business 
carried on in connection therewith may be properly and advantageously 
conducted at all times; provided, however, that the Operating Partnership and 
its subsidiaries shall not be prevented from selling or otherwise disposing 
of their properties for value in the ordinary course of business. 

   Insurance. The Indentures will require the Operating Partnership to cause 
each of its and its subsidiaries' insurable properties to be insured against 
loss or damage at least equal to their then full insurable value with 
insurers of recognized responsibility and, if described in the applicable 
Prospectus Supplement, having a specified rating from a recognized insurance 
rating service. 

   Payment of Taxes and Other Claims. The Indentures will require the 
Operating Partnership to pay or discharge or cause to be paid or discharged, 
before the same shall become delinquent, (i) all taxes, assessments 

                                      7 

<PAGE> 

and governmental charges levied or imposed upon it or any subsidiary or upon 
the income, profits or property of the Operating Partnership or any 
subsidiary and (ii) all lawful claims for labor, materials and supplies 
which, if unpaid, might by law become a lien upon the property of the 
Operating Partnership or any subsidiary; provided, however, that the 
Operating Partnership shall not be required to pay or discharge or cause to 
be paid or discharged any such tax, assessment, charge or claim whose amount, 
applicability or validity is being contested in good faith. 

   Additional Covenants. Any additional covenants of the Operating 
Partnership with respect to any series of Debt Securities will be set forth 
in the Prospectus Supplement relating thereto. 

Events of Default, Notice and Waiver 

   Unless otherwise provided in the applicable Prospectus Supplement, each 
Indenture will provide that the following events are "Events of Default" with 
respect to any series of Debt Securities issued thereunder: (i) default for 
30 days in the payment of any installment of interest on any Debt Security of 
such series; (ii) default in the payment of principal of (or premium, if any, 
on) any Debt Security of such series at its maturity; (iii) default in making 
any sinking fund payment as required for any Debt Security of such series; 
(iv) default in the performance or breach of any other covenant or warranty 
of the Operating Partnership contained in the Indenture (other than a 
covenant added to the Indenture solely for the benefit of a series of Debt 
Securities issued thereunder other than such series), continued for 60 days 
after written notice as provided in the applicable Indenture; (v) a default 
under any bond, debenture, note or other evidence of indebtedness for money 
borrowed (except mortgage indebtedness) by the Operating Partnership or any 
of its subsidiaries in an aggregate principal amount in excess of $25,000,000 
or under any indenture or instrument under which there may be issued or by 
which there may be secured or evidenced any indebtedness for money borrowed 
(except mortgage indebtedness) by the Operating Partnership or any of its 
subsidiaries in an aggregate principal amount in excess of $25,000,000, 
whether such indebtedness exists on the date of such Indenture or shall 
thereafter be created, which default shall have resulted in such indebtedness 
becoming or being declared due and payable prior to the date on which it 
would otherwise have become due and payable or such obligations being 
accelerated, without such acceleration having been rescinded or annulled; 
(vi) certain events of bankruptcy, insolvency or reorganization, or court 
appointment of a receiver, liquidator or trustee of the Operating Partnership 
or any Significant Subsidiary of the Operating Partnership; and (vii) any 
other event of default provided with respect to a particular series of Debt 
Securities. The term "Significant Subsidiary" has the meaning ascribed to 
such term in Regulation S-X promulgated under the Securities Act. 

   If an Event of Default under any Indenture with respect to Debt Securities 
of any series at the time outstanding occurs and is continuing, then in every 
such case the applicable Trustee or the holders of not less than 25% in 
principal amount of the Debt Securities of that series will have the right to 
declare the principal amount (or, if the Debt Securities of that series are 
Original Issue Discount Securities or indexed securities, such portion of the 
principal amount as may be specified in the terms thereof) of all the Debt 
Securities of that series to be due and payable immediately by written notice 
thereof to the Operating Partnership (and to the applicable Trustee if given 
by the holders). However, at any time after such a declaration of 
acceleration with respect to Debt Securities of such series (or of all Debt 
Securities then outstanding under any Indenture, as the case may be) has been 
made, but before a judgment or decree for payment of the money due has been 
obtained by the applicable Trustee, the holders of not less than a majority 
in principal amount of outstanding Debt Securities of such series (or of all 
Debt Securities then outstanding under the applicable Indenture, as the case 
may be) may rescind and annul such declaration and its consequences if (i) 
the Operating Partnership shall have deposited with the applicable Trustee 
all required payments of the principal of (and premium, if any) and interest 
on the Debt Securities of such series (or of all Debt Securities then 
outstanding under the applicable Indenture, as the case may be), plus certain 
fees, expenses, disbursements and advances of the applicable Trustee; and 
(ii) all events of default, other than the non- payment of accelerated 
principal (or specified portion thereof), with respect to Debt Securities of 
such series (or of all Debt Securities then outstanding under the applicable 
Indenture, as the case may be) have been cured or waived as provided in such 
Indenture. The Indentures will also provide that the holders of not less than 
a majority in principal amount of the outstanding Debt Securities of any 
series (or of all Debt Securities then outstanding under the applicable 
Indenture, as the case may be) may waive any past default with respect to 
such series and its consequences, except a default (i) in the payment of the 
principal of (or premium, if any) or interest on any Debt Security of such 
series; or (ii) in respect of a covenant or provision contained in the 
applicable Indenture that cannot be modified or amended without the consent 
of the holder of each outstanding Debt Security affected thereby. 

                                      8 

<PAGE> 

   The Indentures will require each Trustee to give notice to the holders of 
Debt Securities within 90 days of a default under the applicable Indenture 
unless such default shall have been cured or waived; provided, however, that 
such Trustee may withhold notice to the holders of any series of Debt 
Securities of any default with respect to such series (except a default in 
the payment of the principal of (or premium, if any) or interest on any Debt 
Security of such series or in the payment of any sinking fund installment in 
respect of any Debt Security of such series) if specified responsible 
officers of such Trustee consider such withholding to be in the interest of 
such holders. 

   The Indentures will provide that no holders of Debt Securities of any 
series may institute any proceedings, judicial or otherwise, with respect to 
such Indenture or for any remedy thereunder, except in the case of failure of 
the applicable Trustee, for 60 days, to act after it has received a written 
request to institute proceedings in respect of an event of default from the 
holders of not less than 25% in principal amount of the outstanding Debt 
Securities of such series, as well as an offer of indemnity reasonably 
satisfactory to it. This provision will not prevent, however, any holder of 
Debt Securities from instituting suit for the enforcement of payment of the 
principal of (and premium, if any) and interest on such Debt Securities at 
the respective due dates thereof. 

   The Indentures will provide that, subject to provisions in each Indenture 
relating to its duties in case of default, a Trustee will be under no 
obligation to exercise any of its rights or powers under an Indenture at the 
request or direction of any holders of any series of Debt Securities then 
outstanding under such Indenture, unless such holders shall have offered to 
the Trustee thereunder reasonable security or indemnity. The holders of not 
less than a majority in principal amount of the outstanding Debt Securities 
of any series (or of all Debt Securities then outstanding under an Indenture, 
as the case may be) shall have the right to direct the time, method and place 
of conducting any proceeding for any remedy available to the applicable 
Trustee, or of exercising any trust or power conferred upon such Trustee. 
However, a Trustee may refuse to follow any direction which is in conflict 
with any law or the applicable Indenture, which may involve such Trustee in 
personal liability or which may be unduly prejudicial to the holders of Debt 
Securities of such series not joining therein. 

   Within 120 days after the close of each fiscal year, the Operating 
Partnership will be required to deliver to each Trustee a certificate, signed 
by one of several specified officers of the Operating Partnership, stating 
whether or not such officer has knowledge of any default under the applicable 
Indenture and, if so, specifying each such default and the nature and status 
thereof. 

Modification of the Indentures 

   Modifications and amendments of an Indenture will be permitted to be made 
only with the consent of the holders of not less than a majority in principal 
amount of all outstanding Debt Securities issued under such Indenture 
affected by such modification or amendment; provided, however, that no such 
modification or amendment may, without the consent of the holder of each such 
Debt Security affected thereby, (i) change the stated maturity of the 
principal of, or any installment of interest (or premium, if any) on, any 
such Debt Security; (ii) reduce the principal amount of, or the rate or 
amount of interest on, or any premium payable on redemption of, any such Debt 
Security, or reduce the amount of principal of an Original Issue Discount 
Security that would be due and payable upon declaration of acceleration of 
the maturity thereof or would be provable in bankruptcy, or adversely affect 
any right of repayment of the holder of any such Debt Security; (iii) change 
the place of payment, or the coin or currency, for payment of principal of, 
premium, if any, or interest on any such Debt Security; (iv) impair the right 
to institute suit for the enforcement of any payment on or with respect to 
any such Debt Security; (v) reduce the above-stated percentage of any 
outstanding Debt Securities necessary to modify or amend the applicable 
Indenture with respect to such Debt Securities, to waive compliance with 
certain provisions thereof or certain defaults and consequences thereunder or 
to reduce the quorum or voting requirements set forth in the applicable 
Indenture; or (vi) modify any of the foregoing provisions or any of the 
provisions relating to the waiver of certain past defaults or certain 
covenants, except to increase the required percentage to effect such action 
or to provide that certain other provisions may not be modified or waived 
without the consent of the holder of such Debt Security. 

   The holders of a majority in aggregate principal amount of the outstanding 
Debt Securities of each series may, on behalf of all holders of Debt 
Securities of that series, waive, insofar as that series is concerned, 
compliance by the Operating Partnership with certain restrictive covenants of 
the applicable Indenture. 

   Modifications and amendments of an Indenture will be permitted to be made 
by the Operating Partnership and the respective Trustee thereunder without 
the consent of any holder of Debt Securities for any of the following 
purposes: (i) to evidence the succession of another person to the Operating 
Partnership as obligor under such 

                                      9 

<PAGE> 

Indenture; (ii) to add to the covenants of the Operating Partnership for the 
benefit of the holders of all or any series of Debt Securities or to 
surrender any right or power conferred upon the Operating Partnership in such 
Indenture; (iii) to add events of default for the benefit of the holders of 
all or any series of Debt Securities; (iv) to add or change any provisions of 
an Indenture to facilitate the issuance of, or to liberalize certain terms 
of, Debt Securities in bearer form, or to permit or facilitate the issuance 
of Debt Securities in uncertificated form, provided that such action shall 
not adversely affect the interests of the holders of the Debt Securities of 
any series in any material respect; (v) to change or eliminate any provisions 
of an Indenture, provided that any such change or elimination shall become 
effective only when there are no Debt Securities outstanding of any series 
created prior thereto which are entitled to the benefit of such provision; 
(vi) to secure the Debt Securities; (vii) to establish the form or terms of 
Debt Securities of any series; (viii) to provide for the acceptance of 
appointment by a successor Trustee or facilitate the administration of the 
trusts under an Indenture by more than one Trustee; (ix) to cure any 
ambiguity, defect or inconsistency in an Indenture, provided that such action 
shall not adversely affect the interests of holders of Debt Securities of any 
series issued under such Indenture; or (x) to supplement any of the 
provisions of an Indenture to the extent necessary to permit or facilitate 
defeasance and discharge of any series of such Debt Securities, provided that 
such action shall not adversely affect the interests of the holders of the 
outstanding Debt Securities of any series. 

   The Indentures will provide that in determining whether the holders of the 
requisite principal amount of outstanding Debt Securities of a series have 
given any request, demand, authorization, direction, notice, consent or 
waiver thereunder or whether a quorum is present at a meeting of holders of 
Debt Securities, (i) the principal amount of an Original Issue Discount 
Security that shall be deemed to be outstanding shall be the amount of the 
principal thereof that would be due and payable as of the date of such 
determination upon declaration of acceleration of the maturity thereof; (ii) 
the principal amount of any Debt Security denominated in a foreign currency 
that shall be deemed outstanding shall be the U.S. dollar equivalent, 
determined on the issue date for such Debt Security, of the principal amount 
(or, in the case of an Original Issue Discount Security, the U.S. dollar 
equivalent on the issue date of such Debt Security of the amount determined 
as provided in (i) above); (iii) the principal amount of an indexed security 
that shall be deemed outstanding shall be the principal face amount of such 
indexed security at original issuance, unless otherwise provided with respect 
to such indexed security pursuant to such Indenture; and (iv) Debt Securities 
owned by the Operating Partnership or any other obligor upon the Debt 
Securities or any affiliate of the Operating Partnership or of such other 
obligor shall be disregarded. 

   The Indentures will contain provisions for convening meetings of the 
holders of Debt Securities of a series. A meeting will be permitted to be 
called at any time by the applicable Trustee, and also, upon request, by the 
Operating Partnership or the holders of at least 10% in principal amount of 
the outstanding Debt Securities of such series, in any such case upon notice 
given as provided in such Indenture. Except for any consent that must be 
given by the holder of each Debt Security affected by certain modifications 
and amendments of an Indenture, any resolution presented at a meeting or 
adjourned meeting duly reconvened at which a quorum is present may be adopted 
by the affirmative vote of the holders of a majority in principal amount of 
the outstanding Debt Securities of that series; provided, however, that, 
except as referred to above, any resolution with respect to any request, 
demand, authorization, direction, notice, consent, waiver or other action 
that may be made, given or taken by the holders of a specified percentage, 
which is less than a majority, in principal amount of the outstanding Debt 
Securities of a series may be adopted at a meeting or adjourned meeting duly 
reconvened at which a quorum is present by the affirmative vote of the 
holders of such specified percentage in principal amount of the outstanding 
Debt Securities of that series. Any resolution passed or decision taken at 
any meeting of holders of Debt Securities of any series duly held in 
accordance with an Indenture will be binding on all holders of Debt 
Securities of that series. The quorum at any meeting called to adopt a 
resolution, and at any reconvened meeting, will be persons holding or 
representing a majority in principal amount of the outstanding Debt 
Securities of a series; provided, however, that if any action is to be taken 
at such meeting with respect to a consent or waiver which may be given by the 
holders of not less than a specified percentage in principal amount of the 
outstanding Debt Securities of a series, the persons holding or representing 
such specified percentage in principal amount of the outstanding Debt 
Securities of such series will constitute a quorum. 

   Notwithstanding the foregoing provisions, the Indentures will provide that 
if any action is to be taken at a meeting of holders of Debt Securities of 
any series with respect to any request, demand, authorization, direction, 
notice, consent, waiver and other action that such Indenture expressly 
provides may be made, given or taken by the holders of a specified percentage 
in principal amount of all outstanding Debt Securities affected thereby, or 
of the holders of such series and one or more additional series: (i) there 
shall be no minimum quorum requirement 

                                      10 

<PAGE> 

for such meeting; and (ii) the principal amount of the outstanding Debt 
Securities of such series that vote in favor of such request, demand, 
authorization, direction, notice, consent, waiver or other action shall be 
taken into account in determining whether such request, demand, 
authorization, direction, notice, consent, waiver or other action has been 
made, given or taken under such Indenture. 

Subordination 

   Unless otherwise provided in the applicable Prospectus Supplement, 
Subordinated Securities will be subject to the following subordination 
provisions. 

   Upon any distribution to creditors of the Operating Partnership in a 
liquidation, dissolution or reorganization, the payment of the principal of 
and interest on any Subordinated Securities will be subordinated to the 
extent provided in the applicable Indenture in right of payment to the prior 
payment in full of all Senior Debt (as defined below), but the obligation of 
the Operating Partnership to make payments of the principal of and interest 
on such Subordinated Securities will not otherwise be affected. No payment of 
principal or interest will be permitted to be made on Subordinated Securities 
at any time if a default on Senior Debt exists that permits the holders of 
such Senior Debt to accelerate its maturity and the default is the subject of 
judicial proceedings or the Operating Partnership receives notice of the 
default. After all Senior Debt is paid in full and until the Subordinated 
Securities are paid in full, holders will be subrogated to the rights of 
holders of Senior Debt to the extent that distributions otherwise payable to 
holders have been applied to the payment of Senior Debt. The Subordinated 
Indenture will not restrict the amount of Senior Debt or other indebtedness 
of the Operating Partnership and its subsidiaries. As a result of these 
subordination provisions, in the event of a distribution of assets upon 
insolvency, holders of Subordinated Indebtedness may recover less, ratably, 
than general creditors of the Operating Partnership. 

   Senior Debt will be defined in the applicable Indenture as the principal 
of and interest on, or substantially similar payments to be made by the 
Operating Partnership in respect of, the following, whether outstanding at 
the date of execution of the applicable Indenture or thereafter incurred, 
created or assumed: (i) indebtedness of the Operating Partnership for money 
borrowed or represented by purchase-money obligations; (ii) indebtedness of 
the Operating Partnership evidenced by notes, debentures, or bonds, or other 
securities issued under the provisions of an indenture, fiscal agency 
agreement or other agreement; (iii) obligations of the Operating Partnership 
as lessee under leases of property either made as part of any sale and 
leaseback transaction to which the Operating Partnership is a party or 
otherwise; (iv) indebtedness, obligations and liabilities of others in 
respect of which the Operating Partnership is liable contingently or 
otherwise to pay or advance money or property or as guarantor, endorser or 
otherwise or which the Operating Partnership has agreed to purchase or 
otherwise acquire; and (v) any binding commitment of the Operating 
Partnership to fund any real estate investment or to fund any investment in 
any entity making such real estate investment, in each case other than (A) 
any such indebtedness, obligation or liability referred to in clauses (i) 
through (iv) above as to which, in the instrument creating or evidencing the 
same pursuant to which the same is outstanding, it is provided that such 
indebtedness, obligation or liability is not superior in right of payment to 
the Subordinated Securities or ranks without preference to the Subordinated 
Securities; (B) any such indebtedness, obligation or liability which is 
subordinated to indebtedness of the Operating Partnership to substantially 
the same extent as or to a greater extent than the Subordinated Securities 
are subordinated; and (C) the Subordinated Securities. There will not be any 
restrictions in any Indenture relating to Subordinated Securities upon the 
creation of additional Senior Debt. 

   If this Prospectus is being delivered in connection with a series of 
Subordinated Securities, the accompanying Prospectus Supplement or the 
information incorporated herein by reference will set forth the approximate 
amount of Senior Debt outstanding as of the end of the Operating 
Partnership's most recent fiscal quarter. 

Discharge, Defeasance and Covenant Defeasance 

   Unless otherwise indicated in the applicable Prospectus Supplement, the 
Operating Partnership will be permitted, at its option, to discharge certain 
obligations to holders of any series of Debt Securities issued under any 
Indenture that have not already been delivered to the applicable Trustee for 
cancellation and that either have become due and payable or will become due 
and payable within one year (or scheduled for redemption within one year) by 
irrevocably depositing with the applicable Trustee, in trust, funds in such 
currency or currencies, currency unit or units or composite currency or 
currencies in which such Debt Securities are payable in an amount sufficient 

                                      11 

<PAGE> 

to pay the entire indebtedness on such Debt Securities in respect of 
principal (and premium, if any) and interest to the date of such deposit (if 
such Debt Securities have become due and payable) or to the stated maturity 
or redemption date, as the case may be. 

   The Indentures will provide that, unless otherwise indicated in the 
applicable Prospectus Supplement, the Operating Partnership may elect either 
(i) to defease and be discharged from any and all obligations with respect to 
such Debt Securities (except for the obligation to pay additional amounts, if 
any, upon the occurrence of certain events of tax, assessment or governmental 
charge with respect to payments on such Debt Securities and the obligations 
to register the transfer or exchange of such Debt Securities, to replace 
temporary or mutilated, destroyed, lost or stolen Debt Securities, to 
maintain an office or agency in respect of such Debt Securities, to hold 
moneys for payment in trust) ("defeasance"); or (ii) to be released from its 
obligations with respect to such Debt Securities under the applicable 
Indenture (being the restrictions described under "--Certain Covenants") or, 
if provided in the applicable Prospectus Supplement, its obligations with 
respect to any other covenant, and any omission to comply with such 
obligations shall not constitute an event of default with respect to such 
Debt Securities ("covenant defeasance"), in either case upon the irrevocable 
deposit by the Operating Partnership with the applicable Trustee, in trust, 
of an amount, in such currency or currencies, currency unit or units or 
composite currency or currencies in which such Debt Securities are payable at 
stated maturity, or Government Obligations (as defined below), or both, 
applicable to such Debt Securities, which through the scheduled payment of 
principal and interest in accordance with their terms will provide money in 
an amount sufficient to pay the principal of (and premium, if any) and 
interest on such Debt Securities, and any mandatory sinking fund or analogous 
payments thereon, on the scheduled due dates therefor. 

   Such a trust will only be permitted to be established if, among other 
things, the Operating Partnership has delivered to the applicable Trustee an 
opinion of counsel (as specified in the applicable Indenture) to the effect 
that the holders of such Debt Securities will not recognize income, gain or 
loss for U.S. federal income tax purposes as a result of such defeasance or 
covenant defeasance and will be subject to U.S. federal income tax on the 
same amounts, in the same manner and at the same times as would have been the 
case if such defeasance or covenant defeasance had not occurred, and such 
opinion of counsel, in the case of defeasance, will be required to refer to 
and be based upon a ruling received from or published by the Internal Revenue 
Service or a change in applicable United States federal income tax law 
occurring after the date of the Indenture. In the event of such defeasance, 
the holders of such Debt Securities would thereafter be able to look only to 
such trust fund for payment of principal (and premium, if any) and interest. 

   "Government Obligations" means securities that are (i) direct obligations 
of the United States of America or the government which issued the foreign 
currency in which the Debt Securities of a particular series are payable, for 
the payment of which its full faith and credit is pledged; or (ii) 
obligations of a person controlled or supervised by and acting as an agency 
or instrumentality of the United States of America or such government which 
issued the foreign currency in which the Debt Securities of such series are 
payable, the payment of which is unconditionally guaranteed as a full faith 
and credit obligation by the United States of America or such other 
government, which, in either case, are not callable or redeemable at the 
option of the issuer thereof, and shall also include a depository receipt 
issued by a bank or trust company as custodian with respect to any such 
Government Obligation or a specific payment of interest on or principal of 
any such Government Obligation held by such custodian for the account of the 
holder of a depository receipt; provided, however, that (except as required 
by law) such custodian is not authorized to make any deduction from the 
amount payable to the holder of such depository receipt from any amount 
received by the custodian in respect of the Government Obligation or the 
specific payment of interest on or principal of the Government Obligation 
evidenced by such depository receipt. 

   Unless otherwise provided in the applicable Prospectus Supplement, if 
after the Operating Partnership has deposited funds and/or Government 
Obligations to effect defeasance or covenant defeasance with respect to Debt 
Securities of any series, (i) the holder of a Debt Security of such series is 
entitled to, and does, elect pursuant to the applicable Indenture or the 
terms of such Debt Security to receive payment in a currency, currency unit 
or composite currency other than that in which such deposit has been made in 
respect of such Debt Security; or (ii) a Conversion Event (as defined below) 
occurs in respect of the currency, currency unit or composite currency in 
which such deposit has been made, the indebtedness represented by such Debt 
Security will be deemed to have been, and will be, fully discharged and 
satisfied through the payment of the principal of (and premium, if any) and 
interest on such Debt Security as they become due out of the proceeds yielded 
by converting the amount so deposited 

                                      12 

<PAGE> 

in respect of such Debt Security into the currency, currency unit or 
composite currency in which such Debt Security becomes payable as a result of 
such election or such cessation of usage based on the applicable market 
exchange rate. "Conversion Event" means the cessation of use of (i) a 
currency, currency unit or composite currency both by the government of the 
country which issued such currency and for the settlement of transactions by 
a central bank or other public institutions of or within the international 
banking community; (ii) the European Currency Unit ("ECU") both within the 
European Monetary System and for the settlement of transactions by public 
institutions of or within the European Communities; or (iii) any currency 
unit or composite currency other than the ECU for the purposes for which it 
was established. Unless otherwise provided in the applicable Prospectus 
Supplement, all payments of principal of (and premium, if any) and interest 
on any Debt Security that is payable in a foreign currency that ceases to be 
used by its government of issuance shall be made in U.S. dollars. 

   In the event the Company effects covenant defeasance with respect to any 
Debt Securities and such Debt Securities are declared due and payable because 
of the occurrence of any event of default other than the event of default 
described in clause (iv) under "--Events of Default, Notice and Waiver" with 
respect to specified sections of an Indenture (which sections would no longer 
be applicable to such Debt Securities) or described in clause (vii) under 
"--Events of Default, Notice and Waiver" with respect to any other covenant 
as to which there has been covenant defeasance, the amount in such currency, 
currency unit or composite currency in which such Debt Securities are 
payable, and Government Obligations on deposit with the applicable Trustee, 
will be sufficient to pay amounts due on such Debt Securities at the time of 
their stated maturity but may not be sufficient to pay amounts due on such 
Debt Securities at the time of the acceleration resulting from such event of 
default. However, the Operating Partnership would remain liable to make 
payment of such amounts due at the time of acceleration. 

   The applicable Prospectus Supplement may further describe the provisions, 
if any, permitting such defeasance or covenant defeasance, including any 
modifications to the provisions described above, with respect to the Debt 
Securities of or within a particular series. 

No Conversion Rights 
The Debt Securities will not be convertible into or exchangeable for any 
capital stock of the Company or any equity interest in the Operating 
Partnership. 

Payment 

   Unless otherwise specified in the applicable Prospectus Supplement, the 
principal of (and applicable premium, if any) and interest on any series of 
Debt Securities will be payable at the corporate trust office of the Trustee, 
the address of which will be stated in the applicable Prospectus Supplement; 
provided, however, that, at the option of the Operating Partnership, payment 
of interest may be made by check mailed to the address of the person entitled 
thereto as it appears in the applicable register for such Debt Securities or 
by wire transfer of funds to such person at an account maintained within the 
United States. 

   All moneys paid by the Operating Partnership to a paying agent or a 
Trustee for the payment of the principal of or any premium or interest on any 
Debt Security which remain unclaimed at the end of two years after such 
principal, premium or interest has become due and payable will be repaid to 
the Operating Partnership, and the holder of such Debt Security thereafter 
may look only to the Operating Partnership for payment thereof. 

Global Securities 

   The Debt Securities of a series may be issued in whole or in part in the 
form of one or more global securities (the "Global Securities") that will be 
deposited with, or on behalf of, a depositary identified in the applicable 
Prospectus Supplement relating to such series. Global Securities may be 
issued in either registered or bearer form and in either temporary or 
permanent form. The specific terms of the depositary arrangement with respect 
to a series of Debt Securities will be described in the applicable Prospectus 
Supplement relating to such series. 

                        DESCRIPTION OF PREFERRED STOCK 

   The description of the Company's Preferred Stock set forth below does not 
purport to be complete and is qualified in its entirety by reference to the 
Company's Articles of Incorporation (the "Articles of Incorporation") and 
Bylaws (the "Bylaws"), as in effect. 

                                      13 

<PAGE> 

General 

   Under the Articles of Incorporation, the Company has authority to issue 25 
million shares of Preferred Stock, none of which was outstanding as of the 
date of this Prospectus. Shares of Preferred Stock may be issued from time to 
time, in one or more series, as authorized by the Board of Directors of the 
Company. Prior to issuance of shares of each series, the Board of Directors 
is required by the Maryland General Corporation Law ("MGCL") and the 
Company's Articles of Incorporation to fix for each series, subject to the 
provisions of the Company's Articles of Incorporation regarding excess stock, 
$.01 par value per share ("Excess 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, as 
are permitted by Maryland law. The Preferred Stock will, when issued, be 
fully paid and nonassessable and will have no preemptive rights. The Board of 
Directors could authorize the issuance of shares of Preferred Stock with 
terms and conditions that could have the effect of discouraging a takeover or 
other transaction that holders of Common Stock might believe to be in their 
best interests or in which holders of some, or a majority, of the shares of 
Common Stock might receive a premium for their shares over the then market 
price of such shares of Common Stock. 

Terms 

   The following description of the Preferred Stock sets forth certain 
general terms and provisions of the Preferred Stock to which any Prospectus 
Supplement may relate. The statements below describing the Preferred Stock 
are in all respects subject to and qualified in their entirety by reference 
to the applicable provisions of the Company's Articles of Incorporation and 
Bylaws and any applicable amendment to the Articles of Incorporation 
designating terms of a series of Preferred Stock (a "Designating Amendment"). 

   Reference is made to the Prospectus Supplement relating to the Preferred 
Stock offered thereby for specific terms, including: 

    (1) The title and stated value of such Preferred Stock; 

    (2) The number of shares of such Preferred Stock offered, the liquidation 
        preference per share and the offering price of such Preferred Stock; 

    (3) The dividend rate(s), period(s) and/or payment date(s) or method(s) 
        of calculation thereof applicable to such Preferred Stock; 

    (4) The date from which dividends on such Preferred Stock shall 
        accumulate, if applicable; 

    (5) The procedures for any auction and remarketing, if any, for such 
        Preferred Stock; 

    (6) The provision for a sinking fund, if any, for such Preferred Stock; 

    (7) The provision for redemption, if applicable, of such Preferred Stock; 

    (8) Any listing of such Preferred Stock on any securities exchange; 

    (9) The terms and conditions, if applicable, upon which such Preferred 
        Stock will be convertible into Common Stock, including the conversion 
        price or rate (or manner of calculation thereof); 

   (10) Any other specific terms, preferences, rights, limitations or 
        restrictions of such Preferred Stock; 

   (11) A discussion of federal income tax considerations applicable to such 
        Preferred Stock; 

   (12) The relative ranking and preference of such Preferred Stock as to 
        dividend rights and rights upon liquidation, dissolution or winding 
        up of the affairs of the Company; 

   (13) Any limitations on issuance of any series of Preferred Stock ranking 
        senior to or on a parity with such series of Preferred Stock as to 
        dividend rights and rights upon liquidation, dissolution or winding 
        up of the affairs of the Company; and 

   (14) Any limitations on direct or beneficial ownership and restrictions on 
        transfer, in each case as may be appropriate to preserve the status 
        of the Company as a REIT. 

                                      14 

<PAGE> 

Rank 

   Unless otherwise specified in the Prospectus Supplement, the Preferred 
Stock will, with respect to dividend rights and rights upon liquidation, 
dissolution or winding up of the Company, rank (i) senior to all classes or 
series of Common Stock of the Company, and to all equity securities ranking 
junior to such Preferred Stock with respect to dividend rights or rights upon 
liquidation, dissolution or winding up of the Company; (ii) on a parity with 
all equity securities issued by the Company, the terms of which specifically 
provide that such equity securities rank on a parity with the Preferred Stock 
with respect to dividend rights or rights upon liquidation, dissolution or 
winding up of the Company; and (iii) junior to all equity securities issued 
by the Company, the terms of which specifically provide that such equity 
securities rank senior to the Preferred Stock with respect to dividend rights 
or rights upon liquidation, dissolution or winding up of the Company. The 
term "equity securities" does not include convertible debt securities. 

Dividends 

   Holders of the Preferred Stock of each series will be entitled to receive, 
when, as and if declared by the Board of Directors of the Company, out of 
assets of the Company legally available for payment, cash dividends at such 
rates and on such dates as will be set forth in the applicable Prospectus 
Supplement. Each such dividend shall be payable to holders of record as they 
appear on the share transfer books of the Company on such record dates as 
shall be fixed by the Board of Directors of the Company. 

   Dividends on any series of the Preferred Stock may be cumulative or 
non-cumulative, as provided in the applicable Prospectus Supplement. 
Dividends, if cumulative, will be cumulative from and after the date set 
forth in the applicable Prospectus Supplement. If the Board of Directors of 
the Company fails to declare a dividend payable on a dividend payment date on 
any series of the Preferred Stock for which dividends are non-cumulative, 
then the holders of such series of the Preferred Stock will have no right to 
receive a dividend in respect of the dividend period ending on such dividend 
payment date, and the Company will have no obligation to pay the dividend 
accrued for such period, whether or not dividends on such series are declared 
payable on any future dividend payment date. 

   If Preferred Stock of any series is outstanding, no dividends will be 
declared or paid or set apart for payment on any capital stock of the Company 
of any other series ranking, as to dividends, on a parity with or junior to 
the Preferred Stock of such series for any period unless (i) if such series 
of Preferred Stock has a cumulative dividend, full cumulative dividends have 
been or contemporaneously are declared and paid or declared and a sum 
sufficient for the payment thereof is set apart for such payment on the 
Preferred Stock of such series for all past dividend periods and the then 
current dividend period; or (ii) if such series of Preferred Stock does not 
have a cumulative dividend, full dividends for the then current dividend 
period have been or contemporaneously are declared and paid or declared and a 
sum sufficient for the payment thereof is set apart for such payment on the 
Preferred Stock of such series. When dividends are not paid in full (or a sum 
sufficient for such full payment is not so set apart) upon Preferred Stock of 
any series and the shares of any other series of Preferred Stock ranking on a 
parity as to dividends with the Preferred Stock of such series, all dividends 
declared upon Preferred Stock of such series and any other series of 
Preferred Stock ranking on a parity as to dividends with such Preferred Stock 
shall be declared pro rata so that the amount of dividends declared per share 
of Preferred Stock of such series and such other series of Preferred Stock 
shall in all cases bear to each other the same ratio that accrued dividends 
per share on the Preferred Stock of such series (which shall not include any 
accumulation in respect of unpaid dividends for prior dividend periods if 
such Preferred Stock does not have a cumulative dividend) and such other 
series of Preferred Stock bear to each other. No interest, or sum of money in 
lieu of interest, shall be payable in respect of any dividend payment or 
payments on Preferred Stock of such series which may be in arrears. 

   Except as provided in the immediately preceding paragraph, unless (i) if 
such series of Preferred Stock has a cumulative dividend, full cumulative 
dividends on the Preferred Stock of such series have been or 
contemporaneously are declared and paid or declared and a sum sufficient for 
the payment thereof is set apart for payment for all past dividend periods 
and the then current dividend period; and (ii) if such series of Preferred 
Stock does not have a cumulative dividend, full dividends on the Preferred 
Stock of such series have been or contemporaneously are declared and paid or 
declared and a sum sufficient for the payment thereof is set apart for 
payment for the then current dividend period, no dividends (other than in 
shares of Common Stock or other shares of capital stock ranking junior to the 
Preferred Stock of such series as to dividends and upon liquidation) shall be 
declared or paid or set aside for payment nor shall any other distribution be 
declared or made upon the Common 

                                      15 

<PAGE> 

Stock, or any other capital stock of the Company ranking junior to or on a 
parity with the Preferred Stock of such series as to dividends or upon 
liquidation, nor shall any shares of Common Stock, or any other shares of 
capital stock of the Company ranking junior to or on a parity with the 
Preferred Stock of such series as to dividends or upon liquidation be 
redeemed, purchased or otherwise acquired for any consideration (or any 
moneys be paid to or made available for a sinking fund for the redemption of 
any such shares) by the Company (except by conversion into or exchange for 
other capital stock of the Company ranking junior to the Preferred Stock of 
such series as to dividends and upon liquidation). 

   Any dividend payment made on shares of a series of Preferred Stock shall 
first be credited against the earliest accrued but unpaid dividend due with 
respect to shares of such series which remain payable. 

Redemption 

   If so provided in the applicable Prospectus Supplement, the Preferred 
Stock will be subject to mandatory redemption or redemption at the option of 
the Company, as a whole or in part, in each case upon the terms, at the times 
and at the redemption prices set forth in such Prospectus Supplement. 

   The Prospectus Supplement relating to a series of Preferred Stock that is 
subject to mandatory redemption will specify the number of shares of such 
Preferred Stock that shall be redeemed by the Company in each year commencing 
after a date to be specified, at a redemption price per share to be 
specified, together with an amount equal to all accrued and unpaid dividends 
thereon (which shall not, if such Preferred Stock does not have a cumulative 
dividend, include any accumulation in respect of unpaid dividends for prior 
dividend periods) to the date of redemption. The redemption price may be 
payable in cash or other property, as specified in the applicable Prospectus 
Supplement. If the redemption price for Preferred Stock of any series is 
payable only from the net proceeds of the issuance of shares of capital stock 
of the Company, the terms of such Preferred Stock may provide that, if no 
such shares of capital stock shall have been issued or to the extent the net 
proceeds from any issuance are insufficient to pay in full the aggregate 
redemption price then due, such Preferred Stock shall automatically and 
mandatorily be converted into the applicable shares of capital stock of the 
Company pursuant to conversion provisions specified in the applicable 
Prospectus Supplement. 

   Notwithstanding the foregoing, unless (i) if a series of Preferred Stock 
has a cumulative dividend, full cumulative dividends on all shares of such 
series of Preferred Stock shall have been or contemporaneously are declared 
and paid or declared and a sum sufficient for the payment thereof set apart 
for payment for all past dividend periods and the then current dividend 
period; and (ii) if a series of Preferred Stock does not have a cumulative 
dividend, full dividends on all shares of the Preferred Stock of such series 
have been or contemporaneously are declared and paid or declared and a sum 
sufficient for the payment thereof set apart for payment for the then current 
dividend period, no shares of such series of Preferred Stock shall be 
redeemed unless all outstanding shares of Preferred Stock of such series are 
simultaneously redeemed; provided, however, that the foregoing shall not 
prevent the purchase or acquisition of Preferred Stock of such series to 
preserve the REIT status of the Company or pursuant to a purchase or exchange 
offer made on the same terms to holders of all outstanding shares of 
Preferred Stock of such series. In addition, unless (i) if such series of 
Preferred Stock has a cumulative dividend, full cumulative dividends on all 
outstanding shares of such series of Preferred Stock have been or 
contemporaneously are declared and paid or declared and a sum sufficient for 
the payment thereof set apart for payment for all past dividend periods and 
the then current dividend period; and (ii) if such series of Preferred Stock 
does not have a cumulative dividend, full dividends on the Preferred Stock of 
such series have been or contemporaneously are declared and paid or declared 
and a sum sufficient for the payment thereof set apart for payment for the 
then current dividend period, the Company shall not purchase or otherwise 
acquire directly or indirectly any shares of Preferred Stock of such series 
(except by conversion into or exchange for capital shares of the Company 
ranking junior to the Preferred Stock of such series as to dividends and upon 
liquidation); provided, however, that the foregoing shall not prevent the 
purchase or acquisition of shares of Preferred Stock of such series to 
preserve the REIT status of the Company or pursuant to a purchase or exchange 
offer made on the same terms to holders of all outstanding shares of 
Preferred Stock of such series. 

   If fewer than all of the outstanding shares of Preferred Stock of any 
series are to be redeemed, the number of shares to be redeemed will be 
determined by the Company and such shares may be redeemed pro rata from the 
holders of record of such shares in proportion to the number of such shares 
held or for which redemption is requested 

                                      16 

<PAGE> 

by such holder (with adjustments to avoid redemption of fractional shares) or 
by any other equitable manner determined by the Company. 

   Notice of redemption will be mailed at least 30 days but not more than 60 
days before the redemption date to each holder of record of Preferred Stock 
of any series to be redeemed at the address shown on the stock transfer books 
of the Company. Each notice shall state: (i) the redemption date; (ii) the 
number of shares and series of the Preferred Stock to be redeemed; (iii) the 
redemption price; (iv) the place or places where certificates for such 
Preferred Stock are to be surrendered for payment of the redemption price; 
(v) that dividends on the shares to be redeemed will cease to accrue on such 
redemption date; and (vi) the date upon which the holder's conversion rights, 
if any, as to such shares shall terminate. If fewer than all the shares of 
Preferred Stock of any series are to be redeemed, the notice mailed to each 
such holder thereof shall also specify the number of shares of Preferred 
Stock to be redeemed from each such holder. If notice of redemption of any 
Preferred Stock has been given and if the funds necessary for such redemption 
have been set aside by the Company in trust for the benefit of the holders of 
any Preferred Stock so called for redemption, then from and after the 
redemption date dividends will cease to accrue on such Preferred Stock, and 
all rights of the holders of such shares will terminate, except the right to 
receive the redemption price. 

Liquidation Preference 

   Upon any voluntary or involuntary liquidation, dissolution or winding up 
of the affairs of the Company, then, before any distribution or payment shall 
be made to the holders of any Common Stock or any other class or series of 
capital stock of the Company ranking junior to the Preferred Stock in the 
distribution of assets upon any liquidation, dissolution or winding up of the 
Company, the holders of each series of Preferred Stock shall be entitled to 
receive out of assets of the Company legally available for distribution to 
stockholders liquidating distributions in the amount of the liquidation 
preference per share, if any, set forth in the applicable Prospectus 
Supplement, plus an amount equal to all dividends accrued and unpaid thereon 
(which shall not include any accumulation in respect of unpaid noncumulative 
dividends for prior dividend periods). After payment of the full amount of 
the liquidating distributions to which they are entitled, the holders of 
Preferred Stock will have no right or claim to any of the remaining assets of 
the Company. In the event that, upon any such voluntary or involuntary 
liquidation, dissolution or winding up, the available assets of the Company 
are insufficient to pay the amount of the liquidating distributions on all 
outstanding shares of Preferred Stock and the corresponding amounts payable 
on all shares of other classes or series of capital stock of the Company 
ranking on a parity with the Preferred Stock in the distribution of assets, 
then the holders of the Preferred Stock and all other such classes or series 
of capital stock shall share ratably in any such distribution of assets in 
proportion to the full liquidating distributions to which they would 
otherwise be respectively entitled. 

   If liquidating distributions shall have been made in full to all holders 
of Preferred Stock, the remaining assets of the Company shall be distributed 
among the holders of any other classes or series of capital stock ranking 
junior to the Preferred Stock upon liquidation, dissolution or winding up, 
according to their respective rights and preferences and in each case 
according to their respective number of shares. For such purposes, the 
consolidation or merger of the Company with or into any other corporation, 
trust or entity, or the sale, lease or conveyance of all or substantially all 
of the property or business of the Company, shall not be deemed to constitute 
a liquidation, dissolution or winding up of the Company. 

Voting Rights 

   Holders of the Preferred Stock will not have any voting rights, except as 
set forth below or as otherwise from time to time required by law or as 
indicated in the applicable Prospectus Supplement. 

   Unless provided otherwise for any series of Preferred Stock, so long as 
any shares of Preferred Stock of a series remain outstanding, the Company 
will not, without the affirmative vote or consent of the holders of at least 
two-thirds of the shares of such series of Preferred Stock outstanding at the 
time, given in person or by proxy, either in writing or at a meeting (such 
series voting separately as a class), (i) authorize or create, or increase 
the authorized or issued amount of, any class or series of capital stock 
ranking prior to such series of Preferred Stock with respect to payment of 
dividends or the distribution of assets upon liquidation, dissolution or 
winding up or reclassify any authorized capital stock of the Company into 
such shares, or create, authorize or issue any obligation or security 
convertible into or evidencing the right to purchase any such shares; or (ii) 
amend, alter or repeal the provisions of the Company's Articles of 
Incorporation or the Designating Amendment for such series of Preferred 
Stock, 

                                      17 

<PAGE> 

whether by merger, consolidation or otherwise (an "Event"), so as to 
materially and adversely affect any right, preference, privilege or voting 
power of such series of Preferred Stock or the holders thereof; provided, 
however, with respect to the occurrence of any of the Events set forth in 
(ii) above, so long as the Preferred Stock remains outstanding with the terms 
thereof materially unchanged, taking into account that upon the occurrence of 
an Event the Company may not be the surviving entity, the occurrence of any 
such Event shall not be deemed to materially and adversely affect such 
rights, preferences, privileges or voting power of holders of Preferred 
Stock, and provided further that (A) any increase in the amount of the 
authorized Preferred Stock or the creation or issuance of any other series of 
Preferred Stock, or (B) any increase in the amount of authorized shares of 
such series or any other series of Preferred Stock, in each case ranking on a 
parity with or junior to the Preferred Stock of such series with respect to 
payment of dividends or the distribution of assets upon liquidation, 
dissolution or winding up, shall not be deemed to materially and adversely 
affect such rights, preferences, privileges or voting powers. 

   The foregoing voting provisions will not apply if, at or prior to the time 
when the act with respect to which such vote would otherwise be required 
shall be effected, all outstanding shares of such series of Preferred Stock 
shall have been redeemed or called for redemption and sufficient funds shall 
have been deposited in trust to effect such redemption. 

Conversion Rights 

   The terms and conditions, if any, upon which any series of Preferred Stock 
is convertible into Common Stock will be set forth in the applicable 
Prospectus Supplement relating thereto. Such terms will include the number of 
shares of Common Stock into which the shares of Preferred Stock are 
convertible, the conversion price or rate (or manner of calculation thereof), 
the conversion period, provisions as to whether conversion will be at the 
option of the holders of the Preferred Stock or the Company, the events 
requiring an adjustment of the conversion price and provisions affecting 
conversion in the event of the redemption of such series of Preferred Stock. 

Restrictions on Ownership 

   For the Company to qualify as a REIT under the Internal Revenue Code of 
1986, as amended (the "Code"), not more than 50% in value of its outstanding 
capital stock may be owned, directly or indirectly, by five or fewer 
individuals (as defined in the Code to include certain entities) during the 
last half of a taxable year. To assist the Company in meeting this 
requirement, the Company may take certain actions to limit the beneficial 
ownership, directly or indirectly, by a single person of the Company's 
outstanding equity securities, including any Preferred Stock of the Company. 
Therefore, the Designating Amendment for each series of Preferred Stock may 
contain provisions restricting the ownership and transfer of the Preferred 
Stock. The applicable Prospectus Supplement will specify any additional 
ownership limitation relating to a series of Preferred Stock. See 
"Restrictions on Transfers of Capital Stock." 

Transfer Agent 
The transfer agent and registrar for the Preferred Stock will be set forth in 
the applicable Prospectus Supplement. 

                         DESCRIPTION OF COMMON STOCK 

   The description of the Company's Common Stock set forth below does not 
purport to be complete and is qualified in its entirety by reference to the 
Company's Articles of incorporation and Bylaws, as in effect. 

General 


   Under the Articles of Incorporation, the Company has authority to issue 
100 million shares of Common Stock, par value $.01 per share. Under Maryland 
law, stockholders generally are not responsible for the corporation's debts 
or obligations. At March 26, 1997, the Company had outstanding 48,233,236 
shares of Common Stock. 


Terms 

   All shares of Common Stock offered hereby have been duly authorized, and 
are fully paid and non-assessable. Subject to the preferential rights of any 
other shares or series of stock and to the provisions of the Company's 
Articles of Incorporation regarding excess stock, $.01 par value per share 
("Excess Stock"), holders of shares of Common Stock will be entitled to 
receive dividends on shares of Common Stock if, as and when authorized and 
declared 

                                      18 

<PAGE> 

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 Company's Articles of Incorporation 
regarding Excess 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 otherwise required by law 
or except as provided with respect to any other class or series of stock, the 
holders of Common Stock 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 
of Common Stock will not be able to elect any Directors. 

   Holders of Common Stock have no conversion, sinking fund or redemption 
rights, or preemptive rights to subscribe for any securities of the Company. 

   The Company intends to furnish its stockholders with annual reports 
containing audited consolidated financial statements and an opinion thereon 
expressed by an independent public accounting firm and quarterly reports for 
the first three quarters of each fiscal year containing unaudited financial 
information. 

   Subject to the provisions of the Company's Articles of Incorporation 
regarding Excess Stock, all shares of Common Stock will have equal dividend, 
distribution, liquidation and other rights, and will have no preference, 
appraisal or exchange rights. 

   Pursuant to the Maryland General Corporation Law (the "MGCL"), a 
corporation generally cannot dissolve, amend its Articles of Incorporation, 
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 shares entitled to vote on the matter unless a 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 Articles of Incorporation. The 
Company's Articles of Incorporation do not provide for a lesser percentage in 
such situations. 

Restrictions on Ownership 
For the Company to qualify as a REIT under the Internal Revenue Code of 1986, 
as amended (the "Code"), not more than 50% in value of its outstanding 
capital stock may be owned, directly or indirectly, by five or fewer 
individuals (as defined in the Code to include certain entities) during the 
last half of a taxable year. To assist the Company in meeting this 
requirement, the Company may take certain actions to limit the beneficial 
ownership, directly or indirectly, by a single person of the Company's 
outstanding equity securities. See "Restrictions on Transfers of Capital 
Stock." 

Transfer Agent 
The transfer agent and registrar for the Common Stock is Boston EquiServe. 

                  RESTRICTIONS ON TRANSFERS OF CAPITAL STOCK 

Restrictions on Transfers 
In order for the Company to qualify as a REIT under the Code, among other 
things, not more than 50% in value of its outstanding capital stock may be 
owned, directly or indirectly, by five or fewer individuals (defined in the 
Code to include certain entities) during the last half of a taxable year 
(other than the first year) (the "Five or Fewer Requirement"), and such 
shares of capital stock must be beneficially owned by 100 or more persons 
during at least 335 days of a taxable year of 12 months (other than the first 
year) or during a proportionate part of a shorter taxable year. See "Federal 
Income Tax Considerations." In order to protect the Company against the risk 
of losing its status as a REIT on account of a concentration of ownership 
among its stockholders, the Articles of Incorporation, subject to certain 
exceptions, provide that no single holder may own, or be deemed to own by 
virtue of the attribution provisions of the Code, more than 6.0% (the 
"Ownership Limit") of the aggregate value of the Company's shares of Common 
Stock. Pursuant to the Code, Common Stock held by certain types of entities, 
such as pension trusts qualifying under Section 401(a) of the Code, United 
States investment companies registered under the Investment Company Act, 
partnerships, trusts and corporations, will be attributed to the beneficial 
owners of such entities for purposes of the Five or Fewer Requirement (i.e., 
the beneficial owners of such entities will be counted as holders). The 
Company's Articles of Incorporation limits such entities to holding no more 
than 9.9% of the aggregate value 

                                      19 

<PAGE> 

of the Company's shares of capital stock (the "Look-Through Ownership 
Limit"). Any transfer of shares of capital stock or of any security 
convertible into shares of capital stock that would create a direct or 
indirect ownership of shares of capital stock in excess of the Ownership 
Limit or the Look-Through Ownership Limit or that would result in the 
disqualification of the Company as a REIT, including any transfer that 
results in the shares of capital stock being owned by fewer than 100 persons 
or results in the Company being "closely held" within the meaning of Section 
856(h) of the Code, shall be null and void, and the intended transferee will 
acquire no rights to the shares of capital stock. The foregoing restrictions 
on transferability and ownership will not apply if the Board of Directors 
determines that it is no longer in the best interests of the Company to 
attempt to qualify, or to continue to qualify, as a REIT. The Board of 
Directors may, in its sole discretion, waive the Ownership Limit and the 
Look-Through Ownership Limit if evidence satisfactory to the Board of 
Directors and the Company's tax counsel is presented that the changes in 
ownership will not then or in the future jeopardize the Company's REIT status 
and the Board of Directors otherwise decides that such action is in the best 
interest of the Company. 

   Shares of capital stock owned, or deemed to be owned, or transferred to a 
stockholder in excess of the Ownership Limit or the Look-Through Ownership 
Limit will automatically be converted into shares of Excess Stock that will 
be transferred, by operation of law, to the Company as trustee of a trust for 
the exclusive benefit of the transferees to whom such shares of capital stock 
may be ultimately transferred without violating the Ownership Limit or the 
Look-Through Ownership Limit. While the Excess Stock is held in trust, it 
will not be entitled to vote, it will not be considered for purposes of any 
stockholder vote or the determination of a quorum for such vote, and, except 
upon liquidation, it will not be entitled to participate in dividends or 
other distributions. Any distribution paid to a proposed transferee of Excess 
Stock prior to the discovery by the Company that capital stock has been 
transferred in violation of the provisions of the Company's Articles of 
Incorporation shall be repaid to the Company upon demand. The Excess Stock is 
not treasury stock, but rather constitutes a separate class of issued and 
outstanding stock of the Company. The original transferee stockholder may, at 
any time the Excess Stock is held by the Company in trust, transfer the 
interest in the trust representing the Excess Stock to any person whose 
ownership of the shares of capital stock exchanged for such Excess Stock 
would be permitted under the Ownership Limit or the Look- Through Ownership 
Limit, at a price not in excess of (i) the price paid by the original 
transferee-stockholder for the shares of capital stock that were exchanged 
into Excess Stock, or (ii) if the original transferee-stockholder did not 
give value for such shares (e.g., the stock was received through a gift, 
devise or other transaction), the average closing price for the class of 
shares from which such shares of Excess Stock were converted for the ten days 
immediately preceding such sale or gift. Immediately upon the transfer to the 
permitted transferee, the Excess Stock will automatically be converted back 
into shares of capital stock of the class from which it was converted. If the 
foregoing transfer restrictions are determined to be void or invalid by 
virtue of any legal decision, statute, rule or regulation, then the intended 
transferee of any shares of Excess Stock may be deemed, at the option of the 
Company, to have acted as an agent on behalf of the Company in acquiring the 
Excess Stock and to hold the Excess Stock on behalf of the Company. 

   In addition, the Company will have the right, for a period of 90 days 
during the time any shares of Excess Stock are held by the Company in trust, 
to purchase all or any portion of the Excess Stock from the original 
transferee-stockholder at the lesser of (i) the price initially paid for such 
shares by the original transferee stockholder, or if the original 
transferee-stockholder did not give value for such shares (e.g., the shares 
were received through a gift, devise or other transaction), the average 
closing price for the class of stock from which such shares of Excess Stock 
were converted for the ten days immediately preceding such sale or gift, and 
(ii) the average closing price for the class of shares from which such shares 
of Excess Stock were converted for the ten trading days immediately preceding 
the date the Company elects to purchase such shares. The 90-day period begins 
on the date notice is received of the violative transfer if the original 
transferee-stockholder gives notice to the Company of the transfer or, if no 
such notice is given, the date the Board of Directors determines that a 
violative transfer has been made. 

   These restrictions will not preclude settlement of transactions through 
the NYSE. 

   Each stockholder shall upon demand be required to disclose to the Company 
in writing any information with respect to the direct, indirect and 
constructive ownership of capital stock as the Board of Directors deems 
necessary to comply with the provisions of the Code applicable to REITs, to 
comply with the requirements of any taxing authority or governmental agency 
or to determine any such compliance. 

   The Ownership Limit may have the effect of precluding acquisition of 
control of the Company unless the Board of Directors determines that 
maintenance of REIT status is no longer in the best interests of the Company. 

                                      20 

<PAGE> 

                      FEDERAL INCOME TAX CONSIDERATIONS 

   The Company believes it has operated, and the Company intends to continue 
to operate, in such a manner as to qualify as a REIT under the Code, but no 
assurance can be given that it will at all times so qualify. 


   The provisions of the Code pertaining to REITs are highly technical and
complex. The following is a brief and general summary of the material federal
income tax considerations of an investment in the Company's Securities to the
extent those considerations relate to the taxation of the Company. To the extent
such considerations relate to the tax treatment of particular Securities, they
will be addressed in the applicable Prospectus Supplement. Goodwin, Procter &
Hoar LLP has acted as counsel to the Company and has reviewed this summary and
is of the opinion that to the extent that it constitutes matters of law,
summaries of legal matters, or legal conclusions, this summary is accurate in
all material respects. For the particular provisions that govern the federal
income tax treatment of the Company and its stockholders, reference is made to
Sections 856 through 860 of the Code and the regulations thereunder. The
following summary is qualified in its entirety by such reference.

   The statements in this discussion and the opinion of Goodwin, Procter and 
Hoar LLP are based on current provisions of the Code, Treasury Regulations, 
the legislative history of the Code, existing administrative rulings and 
practices of the Service, and judicial decisions. No assurance can be given 
that future legislative, judicial, or administrative actions or decisions, 
which may be retroactive in effect, will not affect the accuracy of any 
statements in this Prospectus with respect to the transactions entered into 
or contemplated prior to the effective date of such changes. 

   EACH INVESTOR IS ADVISED TO CONSULT HIS OWN TAX ADVISOR REGARDING THE 
SPECIFIC TAX CONSEQUENCES TO HIM OR HER OF AN INVESTMENT IN THE COMPANY'S 
SECURITIES. 


   Under the Code, if certain requirements are met in a taxable year, a REIT 
generally will not be subject to federal income tax with respect to income 
that it distributes to its stockholders. However, the Company may be subject 
to federal income tax under certain circumstances including taxes at regular 
corporate rates on any undistributed REIT taxable income, the "alternative 
minimum tax" on its items of tax preference, and taxes imposed on income and 
gain generated by certain extraordinary transactions. If the Company fails to 
qualify during any taxable year as a REIT, unless certain relief provisions 
are available, it will be subject to tax (including any applicable 
alternative minimum tax) on its taxable income at regular corporate rates, 
which could have a material adverse effect upon its stockholders. 


    In addition to meeting a number of technical requirements, including
requirements regarding distributions to shareholders, diversification of
ownership and record keeping, to qualify as a REIT the Company must meet certain
tests regarding the nature of its assets and its gross income. The Company is
largely restricted under these tests to holding "real estate assets" (as defined
in the Code) for investment (and not for resale) and relatively small amounts of
investment securities. Accordingly, the Company's ability to diversify its
holdings outside of investments in real estate is limited. The requirements of
the statutory tests also impose certain requirements on the Company's leases
with its tenants, including restrictions on the Company's ability to provide
noncustomary services to its tenants. Because the Company's proportionate share
of the assets and items of income of the Operating Partnership and its
subsidiary partnerships are treated as assets and gross income of the Company,
the same restrictions apply to the operations and investments of the Operating
Partnership and the subsidiary partnerships. Further, changes in law, or in the
interpretation of the law, may change the nature and effect of these
restrictions or add additional restrictions to the manner in which the Company
conducts its business.

   In the opinion of Goodwin, Procter & Hoar LLP, commencing with the taxable
year ending December 31, 1994, the Company has been organized and operated in
conformity with the requirements for qualification and taxation as a REIT under
the Code, and the Company's proposed method of operation will enable it to
continue to meet the requirements for qualification and taxation as a REIT under
the Code. Investors should be aware, however, that opinions of counsel are not
binding upon the Internal Revenue Service (the "Service") or any court.
Moreover, Goodwin, Procter & Hoar LLP's opinion is based on various assumptions
and is conditioned upon certain representations made by the Company as to
factual matters, including representations regarding the nature of the Company's
properties, and the future conduct of the Company's business. The Company's
qualification and taxation as a REIT depends upon the Company's ability to meet
on a continuing basis, through actual annual operating results, the distribution
levels, stock ownership, and other various qualification tests imposed under the
Code. Goodwin, 





                                      21 

<PAGE> 
Procter & Hoar LLP will not review the Company's compliance with those tests on
a continuing basis. Accordingly, no assurance can be given that the actual
results of the Company's operation for any particular taxable year will satisfy
such requirements.



   Investors are urged to consult their own tax advisors with respect to the 
appropriateness of an investment in the Securities offered hereby and with 
respect to the tax consequences arising under federal law and the laws of any 
state, municipality or other taxing jurisdiction, including tax consequences 
resulting from such investor's own tax characteristics. In particular, 
foreign investors should consult their own tax advisors concerning the tax 
consequences of an investment in the Company, including the possibility of 
United States income tax withholding on Company distributions. 

                             PLAN OF DISTRIBUTION 

   The Company and the Operating Partnership may sell Securities through 
underwriters or dealers, directly to one or more purchasers, through agents 
or through a combination of any such methods of sale. 

   The distribution of the Securities may be effected from time to time in 
one or more transactions at a fixed price or prices, which may be changed, at 
market prices prevailing at the time of sale, at prices related to such 
prevailing market prices, or at negotiated prices. 

   In connection with the sale of Securities, underwriters or agents may 
receive compensation from the Company, from the Operating Partnership or from 
purchasers of Securities, for whom they may act as agents, in the form of 
discounts, concessions or commissions. Underwriters may sell Securities to or 
through dealers, and such dealers may receive compensation in the form of 
discounts, concessions or commissions from the underwriters and/or 
commissions from the purchasers for whom they may act as agents. 
Underwriters, dealers, and agents that participate in the distribution of 
Securities may be deemed to be underwriters under the Securities Act, and any 
discounts or commissions they receive from the Company or the Operating 
Partnership, and any profit on the resale of Securities they realize may be 
deemed to be underwriting discounts and commissions under the Securities Act. 
Any such underwriter or agent will be identified, and any such compensation 
received from the Company or the Operating Partnership will be described, in 
the applicable Prospectus Supplement. 

   Unless otherwise specified in the related Prospectus Supplement, each 
series of Securities will be a new issue with no established trading market, 
other than the Common Stock which is listed on the NYSE. Any shares of Common 
Stock sold pursuant to a Prospectus Supplement will be listed on the NYSE, 
subject to official notice of issuance. The Operating Partnership or the 
Company may elect to list any series of Debt Securities or Preferred Stock on 
an exchange, but is not obligated to do so. It is possible that one or more 
underwriters may make a market in a series of Securities, but will not be 
obligated to do so and may discontinue any market making at any time without 
notice. Therefore, no assurance can be given as to the liquidity of, or the 
trading market for, the Securities. 

   Under agreements into which the Company or the Operating Partnership may 
enter, underwriters, dealers and agents who participate in the distribution 
of Securities may be entitled to indemnification by the Company or the 
Operating Partnership against certain liabilities, including liabilities 
under the Securities Act. In the opinion of the Securities and Exchange 
Commission, such indemnification is against public policy as expressed in the 
Securities Act and is, therefore, unenforceable. 

   Underwriters, dealers and agents may engage in transactions with, or 
perform services for, or be tenants of, the Company or the Operating 
Partnership in the ordinary course of business. 

   If so indicated in the applicable Prospectus Supplement, the Company or 
the Operating Partnership will authorize underwriters or other persons acting 
as the Company's or the Operating Partnership's agents to solicit offers by 
certain institutions to purchase Securities from the Company pursuant to 
contracts providing for payment and delivery on a future date. Institutions 
with which such contracts may be made include commercial and savings banks, 
insurance companies, pension funds, investment companies, educational and 
charitable institutions and others, but in all cases such institutions must 
be approved by the Company or the Operating Partnership, as the case may be. 
The obligations of any purchaser under any such contract will be subject to 
the condition that the 

                                      22 

<PAGE> 

purchase of the Debt Securities shall not at the time of delivery be 
prohibited under the laws of the jurisdiction to which such purchaser is 
subject. The underwriters and such other agents will not have any 
responsibility in respect of the validity or performance of such contracts. 

   If so indicated in the applicable Prospectus Supplement, the Operating 
Partnership will authorize underwriters or other persons acting as the 
Operating Partnership's agents to solicit offers by certain institutions to 
purchase Debt Securities from the Operating Partnership at the public 
offering price set forth in such Prospectus Supplement pursuant to delayed 
delivery contracts ("Contracts") providing for payment and delivery on the 
date or dates stated in such Prospectus Supplement. Each Contract will be for 
an amount not less than, and the aggregate principal amount of Debt 
Securities sold pursuant to Contracts shall be not less nor more than, the 
respective amounts stated in the applicable Prospectus Supplement. 
Institutions with whom Contracts, when authorized, may be made include 
commercial and savings banks, insurance companies, pension funds, investment 
companies, educational and charitable institutions, and other institutions 
but will in all cases be subject to the approval of the Operating 
Partnership. Contracts will not be subject to any conditions except (i) the 
purchase by an institution of the Debt Securities covered by its Contracts 
shall not at the time of delivery be prohibited under the laws of any 
jurisdiction in the United States to which such institution is subject, and 
(ii) if the Debt Securities are being sold to underwriters, the Operating 
Partnership shall have sold to such underwriters the total principal amount 
of the Debt Securities less the principal amount thereof covered by 
Contracts. 

   In order to comply with the securities laws of certain states, if 
applicable, the Securities offered hereby will be sold in such jurisdictions 
only through registered or licensed brokers or dealers. In addition, in 
certain states Securities may not be sold unless they have been registered or 
qualified for sale in the applicable state or an exemption from the 
registration or qualification requirement is available and is complied with. 

   Under applicable rules and regulations under the Exchange Act, any person 
engaged in the distribution of the Securities offered hereby may not 
simultaneously engage in market making activities with respect to the 
Securities for a period of two business days prior to the commencement of 
such distribution. 

                                LEGAL MATTERS 


   Certain legal matters will be passed upon for the Company by Goodwin, 
Procter & Hoar LLP, Boston, Massachusetts, a limited liability partnership 
including professional corporations, as corporate, securities and tax counsel 
to the Company. Gilbert G. Menna, whose professional corporation is a partner 
of Goodwin, Procter & Hoar LLP, is an assistant secretary of the Company and 
owns in excess of 1,000 shares of the Company's Common Stock. 



                                   EXPERTS 


   
     The consolidated balance sheets of the Company as of December 31, 1996 and
1995 and the related consolidated statements of operations, stockholders' equity
and cash flows for the years ended December 31, 1996 and 1995 and for the period
May 26, 1994 to December 31, 1994, and the combined statements of operations,
owners' equity (deficit) and cash flows for the period January 1, 1994 to May
25, 1994 of The Beacon Group, predecessor to the Company, and the related
financial statement schedules of the Company as of December 31, 1996,
incorporated by reference herein from the Company's Annual Report on Form 10-K
for the year ended December 31, 1996 have been so incorporated in reliance on
the report of Coopers & Lybrand L.L.P., independent accountants, given on the
authority of that firm as experts in accounting and auditing. The consolidated
balance sheets of the Operating Partnership as of December 31, 1996 and 1995 and
the related consolidated statements of operations, partners' capital and cash
flows for the years ended December 31, 1996 and 1995 and the period May 26, 1994
to December 31, 1994 and on the combined results of operations and cash flows of
The Beacon Group, predecessor to the Operating Partnership, for the period,
January 1, 1994 to May 25, 1994, incorporated by reference herein from the
Operating Partnership's Form 10, have been so incorporated in reliance on the
report of Coopers & Lybrand L.L.P., independent accountants, given on the
authority of said firm as experts in accounting and auditing. The statements of
excess of revenues over specific operating expenses for each of the Rosslyn
Acquisitions in Rosslyn, Virginia, New England Executive Park in Burlington,
Massachusetts, and 10960 Wilshire Boulevard in Westwood, California for the year
ended December 31, 1995, incorporated by reference herein from the Company's
current report on Form 8-K dated October 18, 1996, have been so incorporated in
reliance on the reports of Coopers & Lybrand L.L.P., independent accountants,
given on the authority of said firm as experts in accounting and auditing. The
statements of excess of revenues over specific

                                       23

<PAGE>

operating expenses for each of the Fairfax County Portfolio in Tysons Corner and
Herndon, Virginia, 1333 H Street in Washington, DC, AT&T Plaza in Oak Brook,
Illinois, and Tri-State International in Lincolnshire, Illinois for the year
ended December 31, 1995, incorporated by reference herein from the Company's
current report on Form 8-K dated July 23, 1996, have been so incorporated in
reliance on the reports of Coopers & Lybrand L.L.P., independent accountants,
given on the authority of said firm as experts in accounting and auditing. The
statement of excess of revenues over specific operating expenses for Perimeter
Center in Atlanta, Georgia for the year ended December 31, 1995, incorporated by
reference herein from the Company's current report on Form 8-K dated February
20, 1996, has been so incorporated in reliance on the reports of Coopers &
Lybrand L.L.P., independent accountants, given on the authority of said firm as
experts in accounting and auditing. The statements of excess of revenues over
specific operating expenses for each of 10880 Wilshire Boulevard in Westwood,
California, Centerpointe in Fairfax, Virginia, and Westbrook Corporate Center in
Westchester, Illinois for the year ended December 31, 1996, incorporated by
reference herein from the Company's current report on Form 8-K dated March 27,
1997, have been so incorporated in reliance on the reports of Coopers & Lybrand
L.L.P., independent accountants, given on the authority of said firm as experts
in accounting and auditing. The statements of excess of revenues over specific
operating expenses for each of Shoreline Technology Park in Mountain View,
California, Lake Marriott Business Park in Santa Clara, California and
Presidents Plaza in Chicago, Illinois for the year ended December 31, 1995,
incorporated by reference herein from the Company's report on Form 8-K dated
December 20, 1996, have been so incorporated in reliance on the reports of
Coopers & Lybrand L.L.P., independent accountants, given on the authority of
said firm as experts in accounting and auditing.
    



                                      24 

<PAGE>

Location Maps

Los Angeles area map depicting the area surrounding the 10880 Wilshire Boulevard
property

Chicago area map depicting the area surrounding the Presidents Plaza and 
Westbrook Corporate Center properties

Washington, D.C. area map depicting the area surrounding the Centerpointe 
property

San Fransisco area map depicting the area surrounding the Lake Marriott and 
Shoreline Technology Park properties


<PAGE> 

 No dealer, salesperson or other individual has been authorized to give any 
information or make any representations not contained or incorporated by 
reference in this Prospectus Supplement and the accompanying Prospectus in 
connection with the offer made by this Prospectus Supplement and the 
accompanying Prospectus. If given or made, such information or representation 
must not be relied upon as having been authorized by the Company or the 
Underwriters. This Prospectus Supplement and the accompanying Prospectus do 
not constitute an offer to sell, or a solicitation of an offer to buy, the 
Shares in any jurisdiction where, or to any person to whom, it is unlawful to 
make such offer or solicitation. Neither the delivery of this Prospectus 
Supplement and the accompanying Prospectus nor any sale made hereunder shall, 
under any circum- stances, create an implication that there has not been any 
change in the facts set forth in this Prospectus Supplement and the 
accompanying Prospectus or in the affairs of the Company since the date 
hereof. 

                                TABLE OF CONTENTS 

<TABLE>

<CAPTION>
                                                      Page 
                                                   --------- 
<S>                                                   <C>
               PROSPECTUS SUPPLEMENT 
Prospectus Supplement Summary                          S-3 
Risk Factors                                          S-16 
The Company                                           S-22 
Recent Developments                                   S-22 
Properties and Pending Acquisitions                   S-28 
Use of Proceeds                                       S-60 
Price Range of Common Stock and 
  Distribution History                                S-61 
Capitalization                                        S-62 
Selected Financial Information                        S-63 
Management                                            S-66 
Federal Income Tax Considerations                     S-71
Underwriting                                          S-73 
Legal Matters                                         S-75 
                    PROSPECTUS 
Available Information                                    2 
Incorporation of Certain Documents by 
  Reference                                              2 
The Company and the Operating Partnership                3 
Use of Proceeds                                          3 
Ratios of Earnings to Fixed Charges                      3 
Description of Debt Securities                           4 
Description of Preferred Stock                          13 
Description of Common Stock                             18 
Restrictions on Transfers of Capital Stock              19 
Federal Income Tax Considerations                       21 
Plan of Distribution                                    22 
Legal Matters                                           23 
Experts                                                 23 
</TABLE>


                                7,000,000 Shares
                                BEACON PROPERTIES
                                   CORPORATION

                                  Common Stock

                              PROSPECTUS SUPPLEMENT
                               Merrill Lynch & Co.
                            Dean Witter Reynolds Inc.
                          Donaldson, Lufkin & Jenrette
                             Securities Corporation
                                 Lehman Brothers
                                 Raymond James &
                                Associates, Inc.
                                Smith Barney Inc.


                                  April , 1997



<PAGE> 

                                   PART II 

                    INFORMATION NOT REQUIRED IN PROSPECTUS 

Item 14. Other Expenses of Issuance and Distribution. 
The following table sets forth the estimated fees and expenses payable by the 
Company and the Operating Partnership in connection with the issuance and 
distribution of the Securities registered hereby (all amounts except the 
registration fee are estimated): 

 Registration fee                       303,031 
Printing and duplicating expenses        10,000 
Legal fees and expenses                  50,000 
Accounting fees and expenses             30,000 
Miscellaneous                             5,000 
                                      ---------- 
Total                                  $398,031 
                                      ========== 

Item 15. Indemnification of Directors and Officers. 
The Company's Articles of Incorporation, as amended, and Bylaws, as amended, 
provide certain limitations on the liability of the Company's Directors and 
officers for monetary damages to the Company. The Articles of Incorporation, 
as amended, and the Bylaws, as amended, obligate the Company to indemnify its 
Directors and officers, and permit the Company to indemnify its employees and 
other agents, against certain liabilities incurred in connection with their 
service in such capacities. These provisions could reduce the legal remedies 
available to the Company and the stockholders against these individuals. 

   The Company's Bylaws, as amended, require it to indemnify its officers, 
Directors and certain other parties to the fullest extent permitted from time 
to time by Maryland law. Maryland General Corporation Law ("MGCL") permits a 
corporation to indemnify (a) any present or former Director or officer who 
has been successful, on the merits or otherwise, in the defense of a 
proceeding to which he was made a party by reason of his service in that 
capacity, against reasonable expenses incurred by him in connection with the 
proceeding and (b) any present or former director or officer against any 
claim or liability unless it is established that (i) his act or omission was 
committed in bad faith or was the result of active or deliberate dishonesty, 
(ii) he actually received an improper personal benefit in money, property or 
services or (iii) in the case of a criminal proceeding, he had reasonable 
cause to believe that his act or omission was unlawful. The MGCL also permits 
the Company to provide indemnification and advance expenses to a present or 
former director or officer who served a predecessor of the Company in such 
capacity, and to any employer or agent of the Company or a predecessor of the 
Company. 

   The Company has entered into indemnification agreements with each of its 
executive officers and Directors. The indemnification agreements require, 
among other matters, that the Company indemnify its officers and directors to 
the fullest extent permitted by law and advance to the officers and Directors 
all related expenses, subject to reimbursement if it is subsequently 
determined that indemnification is not permitted. Under these agreements, the 
Company must also indemnify and advance all expenses incurred by officers and 
Directors seeking to enforce their rights under the indemnification 
agreements and may cover officers and Directors under the Company's 
Directors' and officers' liability insurance. Although the form of 
indemnification agreement offers substantially the same scope of coverage 
afforded by law, it provides additional assurance to Directors and officers 
that indemnification will be available because, as a contract, it cannot be 
modified unilaterally in the future by the Board of Directors or the 
Stockholders to eliminate the rights it provides. It is the position of the 
SEC that indemnification of directors and officers for liabilities under the 
Securities Act of 1933, as amended (the "Securities Act") is against public 
policy and unenforceable pursuant to Section 14 of the Securities Act. 

   The Company provides coverage for its directors and officers under a 
directors' and officers' liability insurance policy. 

Item 16. Exhibits. 
4.1 Articles of Incorporation (1). 

   4.2 Bylaws (2). 

                                      

                                      II-1
<PAGE>


   4.3  Indenture for Senior Debt Securities (3). 

   4.4  Form of Senior Debt Security (included in Exhibit No. 4.3) (3) 

   4.5  Indenture for Subordinated Debt Securities (3). 

   4.6  Form of Subordinated Debt Security (included in Exhibit No. 4.5) (3). 


   5.1  Opinion of Goodwin, Procter & Hoar LLP as to the legality of the 
        Securities being registered (3). 

   8.1  Opinion of Goodwin, Procter & Hoar LLP as to certain tax matters (3). 

   12.1 Calculation of Ratios of Earnings to Fixed Charges (3). 


   23.1 Consent of Coopers & Lybrand L.L.P., independent accountants. 


   23.2 Consent of Goodwin, Procter & Hoar LLP (included in Exhibit 5.1 
        hereto) (3). 


   24.1 Powers of Attorney (included on the signature page hereof) (3). 

(1) Previously filed as an exhibit to the Company's Current Report on Form 
    10-Q for the three months ended June 30, 1996. 
(2) Previously filed as an exhibit to the Company's Registration Statement on 
    Form S-3 (File No. 333-17237). 
(3) Previously filed as an exhibit to this Registration Statement. 

Item 17. Undertakings. 
(a) The undersigned registrant hereby undertakes: 

   (1) To file, during any period in which offers or sales are being made, a 
       post-effective amendment to this registration statement: 

   (i)   To include any prospectus required by Section 10(a)(3) of the 
         Securities Act; 

   (ii)  To reflect in the prospectus any facts or events arising after the 
         effective date of the registration statement (or the most recent 
         post-effective amendment thereof) which, individually or in the 
         aggregate, represent a fundamental change in the information set 
         forth in the registration statement; and 

   (iii) To include any material information with respect to the plan of 
         distribution not previously disclosed in the registration statement 
         or any material change to such information in the registration 
         statement; 

   provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) herein do not 
   apply if the information required to be included in a post-effective 
   amendment by those paragraphs is contained in periodic reports filed by 
   the undersigned registrant pursuant to Section 13 or Section 15(d) of the 
   Exchange Act that are incorporated by reference in the registration 
   statement; 

   (2) That, for the purpose of determining any liability under the 
       Securities Act, each such post-effective amendment 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; and 

   (3) To remove from registration by means of a post-effective amendment any 
       of the securities being registered which remain unsold at the 
       termination of the offering. 

(b) The registrant hereby undertakes that, for purposes of determining any 
    liability under the Securities Act of 1933, each filing of the 
    registrant's annual report pursuant to Section 13(a) or 15(d) of the 
    Securities Exchange Act of 1934 that is incorporated by reference in 
    the Registration Statement 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. 

(c) Insofar as indemnification for liabilities arising under the 
    Securities Act of 1933 may be permitted to directors, officers and 
    controlling persons of the registrant pursuant to the provisions 
    described under Item 15 above, or otherwise, the registrant has been 
    advised that in the opinion of the Securities and 

                                      

                                      II-2
<PAGE>

    Exchange Commission such indemnification is against public policy as 
    expressed in the Securities Act of 1933 and is, therefore, 
    unenforceable. In the event that a claim for indemnification against 
    such liabilities (other than the payment by the registrant of expenses 
    incurred or paid by a director, officer, or controlling person of the 
    registrant in the successful defense of any action, suit or 
    proceeding) is asserted by such director, officer or controlling 
    person in connection with the securities being registered, the 
    registrant will, unless in the opinion of its counsel the matter has 
    been settled by controlling precedent, submit to a court of 
    appropriate jurisdiction the question whether such indemnification by 
    it is against public policy as expressed in the Securities Act of 1933 
    and will be governed by the final adjudication of such issue. 

(d) The undersigned registrant hereby undertakes to file an application 
    for the purpose of determining the eligibility of the trustee to act 
    under subsection (a) of Section 310 of the Trust Indenture Act in 
    accordance with the rules and regulations prescribed by the Commission 
    under Section 305(b)(2) of the Act. 

                                      

                                      II-3
<PAGE>

                                   SIGNATURES


   
   Pursuant to the requirements of the Securities Act of 1933, the 
registrants certify that they have reasonable grounds to believe that they 
meet all of the requirements for filing on Form S-3 and have duly caused this 
amendment to the registration statement to be signed on their behalf by the 
undersigned, thereunto duly authorized, in the City of Boston, Commonwealth 
of Massachusetts on this 4th day of April, 1997. 
    


   BEACON PROPERTIES CORPORATION 

   By: /s/ Alan M. Leventhal 
       ---------------------
       Alan M. Leventhal 
       President and Chief Executive Officer 

   BEACON PROPERTIES, L.P. 

   By: Beacon Properties Corporation 
  Its: General Partner 

   By: /s/ Alan M. Leventhal 
       ----------------------
       Alan M. Leventhal 
       President and Chief Executive Officer 


   Pursuant to the requirements of the Securities Act of 1933, this amendment 
to the registration statement has been signed below by the following persons 
in the capacities and on the date indicated. Each person listed below has 
signed this amendment to the registration statement (i) in their capacity as 
an officer or director of Beacon Properties Corporation ("BCN"), on behalf of 
BCN, and (ii) as an officer or director of BCN, in its capacity as general 
partner of Beacon Properties, L.P. 


   
          Signature          Capacity                           Date 
 ---------------------------- --------------------------------- --------------
    /s/ Alan M. Leventhal    President, Chief Executive 
 -------------------------   Officer and Director                              
      Alan M. Leventhal      (Principal Executive                              
                             Officer)                           April 4, 1997 
                             
              *              Chairman of the Board 
- --------------------------   of Directors                       April 4, 1997 
       Edwin N. Sidman      

    /s/ Lionel P. Fortin     Executive Vice President; 
- --------------------------   Chief Operating Officer and    
       Lionel P. Fortin      Director                       
                             
              *              Senior Vice President and 
- --------------------------   Chief Financial Officer
      Robert J. Perriello    (Principal Financial Officer             
                             and Accounting Officer)            April 4, 1997
                             
              *              Director 
- --------------------------   
      Norman B. Leventhal                                       April 4, 1997 

              *              Director 
- --------------------------   
         Dale F. Frey                                           April 4, 1997 
                             Director 
- --------------------------   
      Graham O. Harrison 

              *              Director 
- --------------------------   
    William F. McCall, Jr.                                      April 4, 1997 

                                      

                                      II-4
<PAGE>



          Signature          Capacity                           Date 
 ---------------------------- --------------------------------- --------------

              *              Director 
- --------------------------   
        Steven Shulman                                          April 4, 1997 

              *              Director 
- --------------------------   
       Scott M. Sperling                                        April 4, 1997 


    *By: Lionel P. Fortin 
- --------------------------  
         Attorney-in-Fact 
    



                                      II-5
<PAGE>

EXHIBIT INDEX 

<TABLE>

<CAPTION>
 Exhibit No.      Description 
 ----------------  ---------------------------------------------------------------------------------------- 
<S>               <C>
       4.1        Articles of Incorporation (1). 
       4.2        Bylaws (2). 
       4.3        Indenture for Senior Debt Securities (3). 
       4.4        Form of Senior Debt Security (included in Exhibit No. 4.3) (3). 
       4.5        Indenture for Subordinated Debt Securities (3). 
       4.6        Form of Subordinated Debt Security (included in Exhibit No. 4.5) (3). 
       5.1        Opinion of Goodwin, Procter & Hoar LLP as to the legality of the Securities being 
                  registered (3). 
       8.1        Opinion of Goodwin, Procter & Hoar LLP as to certain tax matters (3). 
      12.1        Calculation of Ratios of Earnings to Fixed Charges (3). 
      23.1        Consent of Coopers & Lybrand L.L.P., independent accountants 
      23.2        Consent of Goodwin, Procter & Hoar LLP (included in Exhibit 5.1 hereto) (3). 
      24.1        Powers of Attorney (included on the signature page hereto) (3). 
</TABLE>


(1) Previously filed as an exhibit to the Company's Current Report of Form 
    10-Q for the three months ended June 30, 1994. 
(2) Previously filed as an exhibit to the Company's Registration Statement on 
    Form S-3 (333-17237). 
(3) Previously filed as an exhibit to this Registration Statement. 

                                     

                                      II-6


                                                                    Exhibit 23.1
                                                                    ------------

                       CONSENT OF INDEPENDENT ACCOUNTANTS

     We consent to the incorporation by reference in this Registration
Statement, relating to the registration of an indeterminate number of shares of
preferred stock and common stock of Beacon Properties Corporation (the
"Company") with an aggregate offering price of up to $600,000,000 and debt
securities of Beacon Properties, L.P. (the "Operating Partnership") with an
aggregate public offering price of up to $400,000,000, on Form S-3 of our report
dated January 28, 1997, appearing in the Company's Annual Report on Form 10-K
for the year ended December 31, 1996 on our audits of the consolidated financial
position of the Company as of December 31, 1996 and 1995 and the consolidated
results of its operations and its cash flows for the years ended December 31,
1996 and 1995 and for the period May 26, 1994 to December 31, 1994, the combined
results of operations and cash flows of The Beacon Group, predecessor to the
Company, for the period January 1, 1994 to May 25, 1994, and the related
financial statement schedules of the Company as of December 31, 1996.

    We also consent to the incorporation by reference of our report dated
January 21, 1997 on our audits of the consolidated balance sheets of the
Operating Partnership as of December 31, 1996 and 1995 and the related
consolidated statements of operations, partners' capital and cash flows for the
years ended December 31, 1996 and 1995 and the period May 26, 1994 to December
31, 1994, and the combined results of operations and cash flows of The Beacon
Group, predecessor to the Operating Partnership, for the period January 1, 1994
to May 25, 1994, which report was filed with the Securities and Exchange
Commission on the Form 10 of the Operating Partnership.

    We also consent to the incorporation by reference of our report dated March
11, 1997 on our audit of the statement of excess of revenues over specific
operating expenses of 10880 Wilshire Boulevard in Westwood, California for the
year ended December 31, 1996, of our report dated March 18, 1997 on our audit of
the statement of excess of revenues over specific operating expenses of
Centerpointe in Fairfax, Virginia for the year ended December 31, 1996, and of
our report dated March 21, 1997 on our audit of the statement of excess of
revenues over specific operating expenses of Westbrook Corporate Center in
Westchester, Illinois for the year ended December 31, 1996, which reports were
filed with the Securities and Exchange Commission on the Form 8-K of the Company
dated March 27, 1997.

    We also consent to the incorporation by reference of our report dated
February 6, 1997 on our audit of the statement of excess of revenues over
specific operating expenses of Shoreline Technology Park in Mountain View,
California for the year ended December 31, 1995, of our report dated December
20, 1996 on our audit of the statement of excess of revenues over specific
operating expenses of Lake Marriott Business Park in Santa Clara, California for
the year ended December 31, 1995, and of our report dated December 20, 1996 on
our audit of the statement of excess of revenues over specific operating
expenses of Presidents Plaza in Chicago, Illinois for the year ended December
31, 1995, which reports were filed with the Securities and Exchange Commission
on the Form 8-K of the Company dated December 20, 1996, as amended.

    We also consent to the incorporation by reference of our audit report dated
September 27, 1996 on our audit of the statement of excess of revenues over
specific operating expenses of the Rosslyn Acquisitions in Rosslyn, Virginia for
the year ended December 31, 1995, of our report dated March 15, 1996 on our
audit of the statement of excess of revenues over specific operating expenses of
the New England Executive Park in Burlington, Massachusetts for the year ended
December 31, 1995, and of our report dated October 29, 1996 on our audit of the
statement of excess of revenues over specific operating expenses of 10960
Wilshire Boulevard in Westwood, California for the year ended December 31, 1995,
which reports were filed with the Securities and Exchange Commission on the Form
8-K of the Company dated October 18, 1996.

    We also consent to the incorporation by reference of our report dated April
19, 1996 on our audit of the statement of excess of revenues over specific
operating expenses of Fairfax County Portfolio in Tysons Corner and Herndon,
Virginia for the year ended December 31, 1995, of our report dated July 3, 1996
on our audit of the statement of excess of revenues over specific operating
expenses of 1333 H Street in Washington, DC for the year ended December 31,
1995, of our report dated July 8, 1996 on our audit of the statement of excess
of revenues over specific operating expenses of AT&T Plaza in Oak Brook,
Illinois for the year ended December 10, 1995, and of our report dated July 8,
1996 on our audit of the statement of excess of revenues over specific operating
expenses of Tri-State International in Lincolnshire, Illinois for the year ended
December 31, 1995, which reports were filed with the Securities and Exchange
Commission on the Form 8-K of the Company dated July 23, 1996.

    We also consent to the incorporation by reference of our report dated
February 14, 1996 on our audit of the statement of excess of revenues over
specified operating expenses of Perimeter Center, Atlanta, Georgia for the year
ended December 31, 1995, which report was filed with the Securities and Exchange
Commission on the Form 8-K of the Company dated February 20, 1996.

     We also consent to the reference to our Firm under the caption "Experts".


Boston, Massachusetts                         /s/ COOPERS & LYBRAND L.L.P.
April 4, 1997


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission