CORPORATE OFFICE PROPERTIES TRUST INC
S-11/A, 1998-04-09
REAL ESTATE INVESTMENT TRUSTS
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<PAGE>
   
     AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON APRIL 9, 1998
    
 
                                                      REGISTRATION NO. 333-47465
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------
 
   
                                AMENDMENT NO. 2
                                       TO
                                   FORM S-11
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
    
                            ------------------------
 
                       CORPORATE OFFICE PROPERTIES TRUST
        (Exact name of registrant as specified in governing instruments)
 
                                ONE LOGAN SQUARE
                                   SUITE 1105
                             PHILADELPHIA, PA 19103
                                 (215) 567-1800
 (Name, address, including zip code, and telephone number, including area code,
                  of registrant's principal executive offices)
                            ------------------------
 
                              CLAY W. HAMLIN, III
                     PRESIDENT AND CHIEF EXECUTIVE OFFICER
                                ONE LOGAN SQUARE
                                   SUITE 1105
                             PHILADELPHIA, PA 19103
                                 (215) 567-1800
 (Name, address, including zip code, and telephone number, including area code,
                             of agent for service)
                            ------------------------
 
                                   COPIES TO:
 
<TABLE>
<S>                                         <C>
        GERALD S. TANENBAUM, ESQ.                   ROBERT E. KING, JR., ESQ.
         CAHILL GORDON & REINDEL                        ROGERS & WELLS LLP
              80 PINE STREET                             200 PARK AVENUE
         NEW YORK, NEW YORK 10005                    NEW YORK, NEW YORK 10166
              (212) 701-3000                              (212) 878-8000
</TABLE>
 
                            ------------------------
 
    APPROXIMATE DATE OF COMMENCEMENT OF THE PROPOSED SALE TO THE PUBLIC: As soon
as practicable after this Registration Statement becomes effective.
 
    If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, 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 this Form is a post-effective amendment filed pursuant to Rule 462(d)
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,
check the following box. / /
 
    THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
   
                                EXPLANATORY NOTE
    
 
   
    Corporate Office Properties Trust has prepared this Amendment No. 2 for the
purpose of filing with the Securities and Exchange Commission certain exhibits
to this Registration Statement. Amendment No. 2 does not modify any provision of
the Prospectus included in the Registration Statement; accordingly, such
Prospectus has not been included herein.
    
<PAGE>
                PART II. INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 30. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
 
    The Company does not engage in hedging or like activities and therefore does
not have any material exposure to risk due to financial instruments, derivative
financial instruments or derivative commodity instruments.
 
ITEM 31. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.
 
    The expenses in connection with the issuance and distribution of the
securities being registered are set forth in the following table (all amounts
except the registration fee and the NASD fee are estimated):
 
   
<TABLE>
<S>                                                               <C>
Registration fee................................................  $  26,716
NASD fee........................................................      9,556
Listing fee.....................................................    102,100
Printing and engraving expenses.................................
Legal fees and expenses.........................................
Accountant's fees and expenses..................................
Transfer Agent and Registrar's fees and expenses................
Miscellaneous...................................................
Total...........................................................  $
                                                                  ---------
                                                                  ---------
</TABLE>
    
 
    All expenses in connection with the issuance and distribution of the
securities being offered will be borne by the Company.
 
ITEM 32. SALES TO SPECIAL PARTIES.
 
    See Item 33.
 
ITEM 33. RECENT SALES OF UNREGISTERED SECURITIES.
 
    Since its formation on January 22, 1998, the Registrant has issued the
following securities which were not registered under the Securities Act of 1933
as amended (the "Securities Act"):
 
    (i) On January 22, 1998, the Registrant issued one Common Share to COPT,
        Inc. for $100. The Common Share was issued in reliance on the exemption
        from registration contained in Section 4(2) of the Securities Act.
 
    (ii) On March 12, 1998, the Registrant granted to Messrs. Gehrke, Sweet,
         Walton, Wethe and Cassel options exercisable for an aggregate of 45,000
         Common Shares under the Incentive Plan at an exercise price of $12.25
         per share. The options were issued in reliance on the exemption from
         registration contained in Section 4(2) of the Securities Act.
 
    In addition, the Registrant's predecessors have issued the following
securities which were not registered under the Securities Act:
 
    (i) On May 16, 1994, the Company granted to its then directors options
        exercisable for an aggregate of 15,000 shares of Common Stock under the
        Option Plan at an exercise price of $9.875 per share. The options were
        issued in reliance on the exemption from registration contained in
        Section 4(2) of the Securities Act.
 
    (ii) On May 15, 1995, the Company granted to its then directors options
         exercisable for an aggregate of 15,000 shares of Common Stock under the
         Option Plan at an exercise price of $5.375 per share. The options were
         issued in reliance on the exemption from registration contained in
         Section 4(2) of the Securities Act.
 
                                      II-1
<PAGE>
   (iii) On May 20, 1996, the Company granted to its then directors options
         exercisable for an aggregate of 15,000 shares of Common Stock under the
         Option Plan at an exercise price of $5.625 per share. The options were
         issued in reliance on the exemption from registration contained in
         Section 4(2) of the Securities Act.
 
    (iv) On May 19, 1997, the Company granted to its then directors options
         exercisable for an aggregate of 15,000 shares of Common Stock under the
         Option Plan at an exercise price of $5.25 per share. The options were
         issued in reliance on the exemption from registration contained in
         Section 4(2) of the Securities Act.
 
    (v) On October 14, 1997, the Company issued a total of 600,000 shares of
        Common Stock to Messrs. Hamlin and Shidler in connection with the
        Transactions. The shares of Common Stock were issued in reliance on the
        exemption from registration contained in Section 4(2) of the Securities
        Act.
 
    (vi) On October 14, 1997, the Company granted to Messrs. Hamlin, Shidler,
         Sweet and Walton options exercisable for an aggregate of 10,000 shares
         of Common Stock under the Option Plan at an exercise price of $7.59 per
         share. The shares of Common Stock were issued in reliance on the
         exemption from registration contained in Section 4(2) of the Securities
         Act.
 
ITEM 34. INDEMNIFICATION OF TRUSTEES AND OFFICERS.
 
    The Maryland REIT Law permits a Maryland real estate investment trust to
include in its declaration of trust a provision limiting the liability of its
trustees and officers to the trust and its shareholders for money damages except
for liability resulting from (a) actual receipt of an improper benefit or profit
in money, property or services or (b) active and deliberate dishonesty
established by a final judgment as being material to the cause of action. The
Declaration of Trust of the Registrant contains such a provision which
eliminates such liability to the maximum extent permitted by the Maryland REIT
Law.
 
    The Declaration of Trust of the Registrant authorizes it, to the maximum
extent permitted by Maryland law, to obligate itself to indemnify and to pay or
reimburse reasonable expenses in advance of final disposition of a proceeding to
(a) any present or former trustee or officer or (b) any individual who, while a
trustee of the Registrant and at the request of the Registrant, serves or has
served another real estate investment trust, corporation, partnership, joint
venture, trust, employee benefit plan or any other enterprise as a trustee,
director, officer or partner of such real estate investment trust, corporation,
partnership, joint venture, trust, employee benefit plan or other enterprise
from and against any claim or liability to which such person may become subject
or which such person may incur by reason of his or her status as a present or
former Trustee or officer of the Registrant. The Bylaws of the Registrant
obligate it, to the maximum extent permitted by Maryland law, to indemnify and
to pay or reimburse reasonable expenses in advance of final disposition of a
proceeding to (a) any present of former trustee or officer who is made a party
to the proceeding by reason of his service in that capacity or (b) any
individual who, while a Trustee or officer of the Registrant and at the request
of the Registrant, serves or has served another real estate investment trust,
corporation, partnership, joint venture, trust, employee benefit plan or any
other enterprise as a trustee, director, officer or partner of such real estate
investment trust, corporation, partnership, joint venture, trust, employee
benefit plan or other enterprise and who is made a party to the proceeding by
reason of his service in that capacity, against any claim or liability to which
he may become subject by reason of such status. The Declaration of Trust and
Bylaws also permit the Registrant to indemnify and advance expenses to any
person who served a predecessor of the Registrant in any of the capacities
described above and to any employee or agent of the Registrant to indemnify a
trustee or officer who has been successful, on the merits or otherwise, in the
defense of any proceeding to which he is made a party by reason of his service
in that capacity.
 
    The Maryland REIT Law permits a Maryland real estate investment trust to
indemnify and advance expenses to its trustees and officers to the same extent
as permitted by the Maryland General Corporation
 
                                      II-2
<PAGE>
Law (the "MGCL") for directors and officers of Maryland corporations. The MGCL
permits a corporation to indemnify its present and former directors and
officers, among others, against judgments, penalties, fines, settlements and
reasonable expenses actually incurred by them in connection with any proceeding
to which they may be made party by reason of their service in those or other
capacities unless it is established that (a) the act or omission of the director
or officer was material to the matter giving rise to the proceeding and (i) was
committed in bad faith or (ii) was the result of active and deliberate
dishonesty, (b) the director or officer actually received an improper personal
benefit in money, property or services or (c) in the case of any criminal
proceeding, the director or officer had reasonable cause to believe that the act
or omission was unlawful. However, under the MGCL, a Maryland corporation may
not indemnify for an adverse judgment in a suit by or in the right of the
corporation or for a judgment of liability on the basis that personal benefit
was improperly received, unless in either case a court orders indemnification
and then only for expenses. In addition, the MGCL permits a corporation to
advance reasonable expenses to a director or officer upon the corporation's
receipt of (a) a written affirmation by the director or officer of his good
faith belief that he has met the standard of conduct necessary for
indemnification by the corporation and (b) a written undertaking by him or on
his behalf to repay the amount paid or reimbursed by the corporation if it shall
ultimately be determined that the standard of conduct was not met.
 
    The Operating Partnership Agreement provides that the Operating Partnership
shall indemnify the Registrant, as general partner, and each director, officer
and shareholder of the Registrant and each person (including any affiliate)
designated as an agent by the Registrant to the fullest extent permitted under
the Delaware Revised Uniform Limited Partnership Act from and against any and
all losses (including reasonable attorney's fees), and any other amounts arising
out of or in connection with any claim, relating to or resulting (directly or
indirectly) from the operations of the Operating Partnership, in which such
indemnified party becomes involved, or reasonably believes it may become
involved, as a result of its acting in the referred to capacity.
 
    Reference is made to the form of Underwriting Agreement filed as an exhibit
to this Registration Statement pursuant to which the underwriters will agree to
indemnify the Company and its trustees and officers against certain liabilities,
including liabilities under the Securities Act.
 
ITEM 35. TREATMENT OF PROCEEDS FROM STOCK BEING REGISTERED.
 
    The consideration to be received by the Registrant for sales of Common
Shares registered hereby will be credited to the appropriate capital account.
 
ITEM 36. FINANCIAL STATEMENTS AND EXHIBITS.
 
    (a) Financial Statements
 
CORPORATE OFFICE PROPERTIES TRUST, INC.
 
Pro Forma Consolidated Combined Financial Statements (unaudited):
 
Pro Forma Consolidated Combined Statements of Income for the year ended December
    31, 1997
 
Pro Forma Consolidated Balance Sheet as of December 31, 1997
 
Historical:
 
Report of Independent Accountants
 
Consolidated Balance Sheets as of December 31, 1996 and 1997
 
Consolidated Statements of Operations for the years ended December 31, 1995,
    1996 and 1997
 
Consolidated Statements of Cash Flows for the years ended December 31, 1995,
    1996 and 1997
 
Notes to Consolidated Financial Statements
 
SCHEDULE III
 
Real Estate and Accumulated Depreciation as of December 31, 1997
 
                                      II-3
<PAGE>
THE OFFICE PROPERTIES
 
Report of Independent Accountants
 
Combined Balance Sheets as of December 31, 1996 and September 30, 1997
    (unaudited)
 
Combined Statements of Operations for the years ended December 31, 1995 and 1996
    and for the nine month periods ended September 30, 1997 and 1996 (unaudited)
 
Combined Statements of Partners' Capital for the years ended December 31, 1995
    and 1996 and for the nine month period ended September 30, 1997
 
Combined Statements of Cash Flows for the years ended December 31, 1995 and 1996
    and for the nine month periods ended September 30, 1997 and 1996
 
Notes to Combined Financial Statements
 
    (b) Exhibits
 
   
<TABLE>
<CAPTION>
EXHIBIT NO.                                                 DESCRIPTION
- -------------  -----------------------------------------------------------------------------------------------------
<C>            <S>
 
        1.1    Form of Underwriting Agreement.
 
        2.1    Agreement and Plan of Merger, dated as of January 31, 1998, among the Registrant, the Maryland
               Company and the Company (filed with the Trust's Registration Statement on Form S-4 (Commission File
               No. 333-45649) and incorporated herein by reference).
 
        2.2    Formation/Contribution Agreement dated September 7, 1997, as amended, by and among the Company and
               certain subsidiary corporations and partnerships regarding the Transactions (filed with the Company's
               Current Report on Form 8-K on October 29, 1997 and incorporated herein by reference).
 
        2.3    Agreement and Plan of Reorganization between the Company and Crown Advisors, Inc. (filed with the
               Company's Current Report on Form 8-K on October 29, 1997 and incorporated herein by reference).
 
        2.4    Limited Partnership Agreement of the Operating Partnership dated October 14, 1997 (filed with the
               Company's Current Report on Form 8-K on October 29, 1997 and incorporated herein by reference).
 
        2.5    Amended and Restated Partnership Agreement of Blue Bell Investment Company, L.P. (filed with the
               Company's Current Report on Form 8-K on October 29, 1997 and incorporated herein by reference).
 
        2.6    Amended and Restated Partnership Agreement of South Burnswick Investors, L.P. (filed with the
               Company's Current Report on Form 8-K on October 29, 1997 and incorporated herein by reference).
 
        2.7    Amended and Restated Partnership Agreement of ComCourt Investors, L.P. (filed with the Company's
               Current Report on Form 8-K on October 29, 1997 and incorporated herein by reference).
 
        2.8    Amended and Restated Partnership Agreement of 6385 Flank, L.P. (filed with the Company's Current
               Report on Form 8-K on October 29, 1997 and incorporated herein by reference).
 
        3.1    Amended and Restated Declaration of Trust of Registrant (filed with the Registrant's Registration
               Statement on Form S-4 (Commission File No. 333-45649) and incorporated herein by reference).
 
        3.2    Bylaws of Registrant (filed with the Registrant's Registration Statement on Form S-4 (Commission File
               No. 333-45649) and incorporated herein by reference).
</TABLE>
    
 
                                      II-4
<PAGE>
   
<TABLE>
<CAPTION>
EXHIBIT NO.                                                 DESCRIPTION
- -------------  -----------------------------------------------------------------------------------------------------
<C>            <S>
        4.1    Form of certificate for the Registrant's Common Shares of Beneficial Interest, $0.01 par value per
               share (filed with the Registrant's Registration Statement on Form S-4 (Commission File No. 333-45649)
               and incorporated herein by reference).
 
        5.1    Opinion of Cahill Gordon & Reindel regarding the legality of the securities being registered hereby.
 
        8.1    Opinion of Cahill Gordon & Reindel as to certain tax matters.
 
       10.1    Clay W. Hamlin III Employment Agreement dated October 14, 1997 with the Operating Partnership (filed
               with the Company's Current Report on Form 8-K on October 29, 1997, and incorporated herein by
               reference).
 
       10.2    Registration Rights Agreement dated October 14, 1997, as amended, for the benefit of certain
               shareholders of the Registrant (filed with the Company's Current Report on Form 8-K on October 29,
               1997, and incorporated herein by reference).
 
       10.3    Management Agreement between Registrant and Glacier Realty, LLC (filed with the Company's Current
               Report on Form 8-K on October 29, 1997, and incorporated herein by reference).
 
       10.4    Senior Secured Credit Agreement dated October 13, 1997 (filed with the Company's Current Report on
               Form 8-K on October 29, 1997, and incorporated herein by reference).
 
       10.5    Corporate Office Properties Trust 1998 Long Term Incentive Plan (filed with the Registrant's
               Registration Statement on Form S-4 (Commission File No. 333-45649) and incorporated herein by
               reference).
 
       10.6    Stock Option Plan for Directors (filed with Royale Investments, Inc.'s Form 10-KSB for the year ended
               December 31, 1993 (Commission File No. 0-20047) and incorporated herein by reference).
 
       10.7    Lease Agreement between Blue Bell Investment Company, L.P. and Unisys Corporation dated March 12,
               1997 with respect to lot A (filed with the Registrant's Registration Statement on Form S-4
               (Commission File No. 333-45649) and incorporated herein by reference).
 
       10.8    Lease Agreement between Blue Bell Investment Company, L.P. and Unisys Corporation dated March 12,
               1997 with respect to lot B (filed with the Registrant's Registration Statement on Form S-4
               (Commission File No. 333-45649) and incorporated herein by reference).
 
       10.9    Lease Agreement between Blue Bell Investment Company, L.P. and Unisys Corporation dated March 12,
               1997 with respect to lot C (filed with the Registrant's Registration Statement on Form S-4
               (Commission File No. 333-45649) and incorporated herein by reference).
 
      10.11    Amended and Restated Lease between South Brunswick Investors L.P. and International Business Machines
               Corporation dated August 11, 1995, as amended (filed with the Registrant's Registration Statement on
               Form S-4 (Commission File No. 333-45649) and incorporated herein by reference).
 
      10.12    Agreement of Lease between South Brunswick Investors L.P. and Teleport Communications Group, Inc.
               dated February 20, 1996, as amended (filed with the Registrant's Registration Statement on Form S-4
               (Commission File No. 333-45649) and incorporated herein by reference).
</TABLE>
    
 
   
                                      II-5
    
<PAGE>
   
<TABLE>
<CAPTION>
EXHIBIT NO.                                                 DESCRIPTION
- -------------  -----------------------------------------------------------------------------------------------------
<C>            <S>
      10.13    Agreement of Lease between South Brunswick Investors L.P. and Teleport Communications Group, Inc.
               dated August 19, 1996 (filed with the Registrant's Registration Statement on Form S-4 (Commission
               File No. 333-45649) and incorporated herein by reference).
 
      10.14    Thomas D. Cassel Employment Agreement dated October 20, 1997 with the Operating Partnership (filed
               with the Registrant's 1997 Annual Report on Form 10-K and incorporated herein by reference).
 
       16.1    Letter to the Commission from Lurie, Besikof, Lapidus & Co., LLP dated November 4, 1997 (filed with
               Company's Current Report on Form 8-K on November 6, 1997, and incorporated herein by reference).
 
       21.1    Subsidiaries of Registrant (filed with the Registrant's 1997 Annual Report on Form 10-K and
               incorporated herein by reference).
 
       23.1    Consent of Cahill Gordon & Reindel (included in Exhibit 5.1).
 
       23.2    Consent of Coopers & Lybrand L.L.P.*
 
       24.1    Powers of attorney (included on signature page to the Registration Statement).*
</TABLE>
    
 
- ------------------------
 
   
* Previously filed.
    
 
ITEM 36. UNDERTAKINGS.
 
    (a) 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 foregoing provisions, or otherwise, the
Registrant has been advised that in the opinion of the Securities and Exchange
Commission such indemnification is against public policy as expressed in the Act
and is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the Registrant of expenses
incurred or paid by a director, officer or controlling person of the Registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities 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 Act and will be governed by the final adjudication of
such issue.
 
    (b) The undersigned Registrant hereby undertakes:
 
        (1) For purposes of determining any liability under the Securities Act
    of 1933, as amended, the information omitted from the form of prospectus
    filed as part of a registrant statement in reliance upon Rule 430A, and
    contained in the form of prospectus filed by the Registrant pursuant to Rule
    424(b)(1) or (4) or 497(h) under the Securities Act, shall be deemed to be
    part of the registration statement as of the time it was declared effective.
 
        (2) For the purpose of determining any liability under the Securities
    Act of 1933, each post-effective amendment that contains a form of
    prospectus shall be deemed to be a new registration statement relating to
    the securities offered therein, and the offering of such securities at that
    time shall be deemed to be the initial bona fide offering thereof.
 
                                      II-6
<PAGE>
                                   SIGNATURES
 
   
PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE REGISTRANT
CERTIFIES THAT IT HAS REASONABLE GROUNDS TO BELIEVE THAT IT MEETS ALL OF THE
REQUIREMENTS FOR FILING ON FORM S-11 AND HAS DULY CAUSED THIS AMENDMENT TO THE
REGISTRATION STATEMENT TO BE SIGNED ON ITS BEHALF BY THE UNDERSIGNED, THEREUNTO
DULY AUTHORIZED, IN THE CITY OF PHILADELPHIA, STATE OF PENNSYLVANIA, ON THE 8TH
DAY OF APRIL, 1998.
    
 
                                CORPORATE OFFICE PROPERTIES TRUST
 
                                By:  /s/ CLAY W. HAMLIN, III
                                     ------------------------------------------
                                     CLAY W. HAMLIN, III
                                     PRESIDENT AND CHIEF EXECUTIVE OFFICER
 
   
    Pursuant to the requirements of the Securities Act of 1933, as amended, this
Amendment to the Registration Statement has been signed by the following persons
in the capacities and on the dates indicated.
    
 
   
          SIGNATURES                       TITLE                    DATE
- ------------------------------  ---------------------------  -------------------
              *                 Chairman of the Board           April 8, 1998
- ------------------------------    and Trustee
       (Jay H. Shidler)
 
                                President and Chief             April 8, 1998
              *                   Executive
- ------------------------------    Officer, Trustee
    (Clay W. Hamlin, III)         (Principal
                                  Executive Officer)
 
     /s/ THOMAS D. CASSEL       Vice President, Finance         April 8, 1998
- ------------------------------    (Principal Accounting and
      (Thomas D. Cassel)          Financial Officer)
 
              *                 Vice Chairman of the Board      April 8, 1998
- ------------------------------    and Trustee
       (Vernon R. Beck)
 
              *                 Trustee                         April 8, 1998
- ------------------------------
      (Kenneth D. Wethe)
 
              *                 Trustee                         April 8, 1998
- ------------------------------
      (Allen C. Gehrke)
 
              *                 Trustee                         April 8, 1998
- ------------------------------
     (William H. Walton)
 
              *                 Trustee                         April 8, 1998
- ------------------------------
   (Kenneth S. Sweet, Jr.)
 
*By:          /s/ Thomas D.
Cassel
- ------------------------------
       ATTORNEY-IN-FACT
 
    
 
                                      II-7
<PAGE>
                                 EXHIBIT INDEX
 
   
<TABLE>
<CAPTION>
                                                                                                                PAGE
EXHIBIT NO.    DESCRIPTION                                                                                     NUMBER
- -------------  -------------------------------------------------------------------------------------------  -------------
<C>            <S>                                                                                          <C>
        1.1    Form of Underwriting Agreement.
        2.1    Agreement and Plan of Merger, dated as of January 31, 1998, among the Registrant, the
               Maryland Company and the Company (filed with the Registrant's Registration Statement on
               Form S-4 (Commission File No. 333-45649) and incorporated herein by reference).
        2.2    Formation/Contribution Agreement dated September 7, 1997, as amended, by and among the
               Company and certain subsidiary corporations and partnerships regarding the Transactions
               (filed with the Company's Current Report on Form 8-K on October 29, 1997 and incorporated
               herein by reference).
        2.3    Agreement and Plan of Reorganization between the Company and Crown Advisors, Inc. (filed
               with the Company's Current Report on Form 8-K on October 29, 1997 and incorporated herein
               by reference).
        2.4    Limited Partnership Agreement of the Operating Partnership dated October 14, 1997 (filed
               with the Company's Current Report on Form 8-K on October 29, 1997 and incorporated herein
               by reference).
        2.5    Amended and Restated Partnership Agreement of Blue Bell Investment Company, L.P. (filed
               with the Company's Current Report on Form 8-K on October 29, 1997 and incorporated herein
               by reference).
        2.6    Amended and Restated Partnership Agreement of South Burnswick Investors, L.P. (filed with
               the Company's Current Report on Form 8-K on October 29, 1997 and incorporated herein by
               reference).
        2.7    Amended and Restated Partnership Agreement of ComCourt Investors, L.P. (filed with the
               Company's Current Report on Form 8-K on October 29, 1997 and incorporated herein by
               reference).
        2.8    Amended and Restated Partnership Agreement of 6385 Flank, L.P. (filed with the Company's
               Current Report on Form 8-K on October 29, 1997 and incorporated herein by reference).
        3.1    Amended and Restated Declaration of Trust of Registrant (filed with the Registrant's
               Registration Statement on Form S-4 (Commission File No. 333-45649) and incorporated herein
               by reference).
        3.2    Bylaws of Registrant (filed with the Registrant's Registration Statement on Form S-4
               (Commission File No. 333-45649) and incorporated herein by reference).
        4.1    Form of certificate for the Registrant's Common Shares of Beneficial Interest, $0.01 par
               value per share (filed with the Registrant's Registration Statement on Form S-4 (Commission
               File No. 333-45649) and incorporated herein by reference).
        5.1    Opinion of Cahill Gordon & Reindel regarding the legality of the securities being
               registered hereby.
        8.1    Opinion of Cahill Gordon & Reindel as to certain tax matters.
       10.1    Clay W. Hamlin III Employment Agreement dated October 14, 1997 with the Operating
               Partnership (filed with the Company's Current Report on Form 8-K on October 29, 1997, and
               incorporated herein by reference).
       10.2    Registration Rights Agreement dated October 14, 1997 for the benefit of certain
               shareholders of the Registrant (filed with the Company's Current Report on Form 8-K on
               October 29, 1997, and incorporated herein by reference).
       10.3    Management Agreement between Registrant and Glacier Realty, LLC (filed with the Company's
               Current Report on Form 8-K on October 29, 1997, and incorporated herein by reference).
       10.4    Senior Secured Credit Agreement dated October 13, 1997 (filed with the Company's Current
               Report on Form 8-K on October 29, 1997, and incorporated herein by reference).
</TABLE>
    
<PAGE>
   
<TABLE>
<CAPTION>
                                                                                                                PAGE
EXHIBIT NO.    DESCRIPTION                                                                                     NUMBER
- -------------  -------------------------------------------------------------------------------------------  -------------
<C>            <S>                                                                                          <C>
       10.5    Corporate Office Properties Trust 1998 Long Term Incentive Plan (filed with the
               Registrant's Registration Statement on Form S-4 (Commission File No. 333-45649) and
               incorporated herein by reference).
       10.6    Stock Option Plan for Directors (filed with Royale Investments, Inc.'s Form 10-KSB for the
               year ended December 31, 1993 (Commission File No. 0-20047) and incorporated herein by
               reference).
       10.7    Lease Agreement between Blue Bell Investment Company, L.P. and Unisys Corporation dated
               March 12, 1997 with respect to lot A (filed with the Registrant's Registration Statement on
               Form S-4 (Commission File No. 333-45649) and incorporated herein by reference).
       10.8    Lease Agreement between Blue Bell Investment Company, L.P. and Unisys Corporation dated
               March 12, 1997 with respect to lot B (filed with the Registrant's Registration Statement on
               Form S-4 (Commission File No. 333-45649) and incorporated herein by reference).
       10.9    Lease Agreement between Blue Bell Investment Company, L.P. and Unisys Corporation dated
               March 12, 1997 with respect to lot C (filed with the Registrant's Registration Statement on
               Form S-4 (Commission File No. 333-45649) and incorporated herein by reference).
      10.11    Amended and Restated Lease between South Brunswick Investors L.P. and International
               Business Machines Corporation dated August 11, 1995, as amended (filed with the
               Registrant's Registration Statement on Form S-4 (Commission File No. 333-45649) and
               incorporated herein by reference).
      10.12    Agreement of Lease between South Brunswick Investors L.P. and Teleport Communications
               Group, Inc. dated February 20, 1996, as amended (filed with the Registrant's Registration
               Statement on Form S-4 (Commission File No. 333-45649) and incorporated herein by
               reference).
      10.13    Agreement of Lease between South Brunswick Investors L.P. and Teleport Communications
               Group, Inc. dated August 19, 1996 (filed with the Registrant's Registration Statement on
               Form S-4 (Commission File No. 333-45649) and incorporated herein by reference).
      10.14    Thomas D. Cassel Employment Agreement dated October 20, 1997 with the Operating Partnership
               (filed with the Registrant's 1997 Annual Report on Form 10-K and incorporated herein by
               reference).
       16.1    Letter to the Commission from Lurie, Besikof, Lapidus & Co., LLP dated November 4, 1997
               (filed with Company's Current Report on Form 8-K on November 6, 1997, and incorporated
               herein by reference).
       21.1    Subsidiaries of Registrant (filed with the Registrant's 1997 Annual Report on Form 10-K and
               incorporated herein by reference).
       23.1    Consent of Cahill Gordon & Reindel (included in Exhibit 5.1).
       23.2    Consent of Coopers & Lybrand L.L.P.*
       24.1    Powers of attorney (included on signature page to the Registration Statement).*
</TABLE>
    
 
- ------------------------
 
   
* Previously filed.
    





<PAGE>

                                                                  EXHIBIT 1.1
                                                                 

                                7,500,000 Shares

                        CORPORATE OFFICE PROPERTIES TRUST

                      Common Shares of Beneficial Interest

                             UNDERWRITING AGREEMENT

                                                                 April __, 1998

DONALDSON, LUFKIN & JENRETTE
  SECURITIES CORPORATION
BT ALEX. BROWN INCORPORATED
PRUDENTIAL SECURITIES INCORPORATED
As representatives of the several
  Underwriters named in Schedule I hereto
c/o Donaldson, Lufkin & Jenrette
  Securities Corporation
  277 Park Avenue
  New York, New York 10172

Dear Sirs:

         Corporate Office Properties Trust, a Maryland real estate investment
trust (the "Company"), proposes to issue and sell 7,500,000 common shares of
beneficial interest, par value $.01 per share (the "Firm Shares"), to the
several underwriters named in Schedule I hereto (the "Underwriters"). The
Company also proposes to issue and sell to the several Underwriters up to an
additional 1,125,000 common shares of beneficial interest, par value $.01 per
share (the "Additional Shares"), if requested by the Underwriters as provided in
Section 2 hereof. The Firm Shares and the Additional Shares are hereinafter
referred to collectively as the "Shares." The common shares of beneficial
interest of the Company to be outstanding after giving effect to the sales
contemplated hereby are hereinafter referred to as the "Common Shares."

         SECTION 1. Registration Statement and Prospectus. The Company has
prepared and filed with the Securities and Exchange Commission (the
"Commission") in accordance with the provisions of the Securities Act of 1933,
as amended, and the rules and regulations of the Commission thereunder
(collectively, the "Act"), a registration statement on Form S-11 (Registration
No. 333-47465), including a prospectus, relating to the Shares. The registration
statement, as amended at the time it became effective, including the information
(if any) deemed to be part of the registration statement at the time of
effectiveness pursuant to Rule 430A under the Act, is hereinafter referred to as
the "Registration Statement"; and the prospectus in the form first used to
confirm sales of Shares is hereinafter referred to as the "Prospectus." If the
Company has filed or is required pursuant to the terms hereof to file a
registration statement pursuant to Rule 462(b) under the Act registering
additional Common Shares (a "Rule 462(b) Registration Statement"), then, unless
otherwise specified, any reference herein to the term "Registration Statement"
shall be deemed to include such Rule 462(b) Registration Statement. Capitalized



<PAGE>



terms used but not otherwise defined herein shall have the meanings given to
those terms in the Prospectus.

         SECTION 2. Agreements to Sell and Purchase and Lock-Up Agreements. On
the basis of the representations and warranties contained in this Agreement, and
subject to its terms and conditions, the Company agrees to issue and sell, and
each Underwriter agrees, severally and not jointly, to purchase from the Company
at a price per Share of $       (the "Purchase Price") the number of Firm 
Shares set forth opposite the name of such Underwriter in Schedule I hereto.

         On the basis of the representations and warranties contained in this
Agreement, and subject to its terms and conditions, the Company agrees to issue
and sell the Additional Shares and the Underwriters shall have the right to
purchase, severally and not jointly, up to 1,125,000 Additional Shares from the
Company at the Purchase Price. Additional Shares may be purchased solely for the
purpose of covering over-allotments made in connection with the offering of the
Firm Shares. The Underwriters may exercise their right to purchase Additional
Shares in whole or in part from time to time by giving written notice thereof to
the Company within thirty (30) days after the date of this Agreement. You shall
give any such notice on behalf of the Underwriters and such notice shall specify
the aggregate number of Additional Shares to be purchased pursuant to such
exercise and the date for payment and delivery thereof, which date shall be a
business day (i) no earlier than two (2) business days after such notice has
been given (and, in any event, no earlier than the Closing Date (as hereinafter
defined)) and (ii) no later than ten (10) business days after such notice has
been given. If any Additional Shares are to be purchased, each Underwriter,
severally and not jointly, agrees to purchase from the Company the number of
Additional Shares (subject to such adjustments to eliminate fractional shares as
you may determine) which bears the same proportion to the total number of
Additional Shares to be purchased from the Company as the number of Firm Shares
set forth opposite the name of such Underwriter in Schedule I bears to the total
number of Firm Shares.

         The Company and Corporate Office Properties, L.P., a Delaware limited
partnership (the "Operating Partnership"), hereby agree not to (i) offer,
pledge, sell, contract to sell, sell any option or contract to purchase,
purchase any option or contract to sell, grant any option, right or warrant to
purchase, or otherwise transfer or dispose of, directly or indirectly, (or enter
into any transaction or device which is designed to, or could be expected to,
result in the disposition by any person at any time in the future of), any
Common Shares, units of limited partnership (the "Common Units") and preferred
units (the "Preferred Units" and collectively with the Common Units, the
"Units") of the Operating Partnership or any securities convertible into or
exercisable, exchangeable or redeemable for Common Shares or Units or (ii) enter
into any swap or other arrangement that transfers all or a portion of the
economic consequences associated with the ownership of any Common Shares or
Units (regardless of whether any of the transactions described in clause (i) or
(ii) is to be settled by the delivery of Common Shares, Units, or such other
securities, in cash or otherwise), except to the Underwriters pursuant to this
Agreement, for a period of 180 days after the date of the Prospectus without the
prior written consent of Donaldson, Lufkin & Jenrette Securities Corporation
(which shall not be unreasonably withheld or delayed). Notwithstanding the
foregoing, during such period the Company and the Operating Partnership may (i)
issue Common Shares upon the exercise of stock options pursuant to the Company's
Option Plan and Incentive Plan (as defined in the Prospectus), (ii) redeem Units
for Common Shares, (iii) grant a bona fide security interest in, or a bona fide
pledge of, Common Shares and/or Units to a recognized financial institution and
transactions contemplated by such grants or pledges whether made before or after
the date of the Underwriting Agreement, (iv) transfer to entities controlled by,
or under the common control of, the transferor, (v) transfer to members of the
immediate family (or to an entity for their benefit), (vi) convert Preferred
Units into Common Units, (vii) issue shares of, or securities convertible into
or exercisable or exchangeable for, Common Shares and/or issue Units in
connection with private



                                        2


<PAGE>



placements for the acquisition of real property (or related assets) or direct or
indirect interests in real property by the Company or its affiliates, (viii)
issue Units to the Company and (ix) grant options pursuant to the Company's
Option Plan and Incentive Plan; provided that, in the case of a transfer of the
type described in clause (v), prior to making any such transfer, the transferor
shall have delivered a written instrument to Donaldson, Lufkin & Jenrette
Securities Corporation in which the transferee agrees to be bound by the
restrictions contained in this agreement with respect to the subject of such
transfer. The Company also agrees not to file any registration statement with
respect to any Common Shares or any securities convertible into or exercisable,
exchangeable or redeemable for Common Shares for a period of 180 days after the
date of the Prospectus without having given two (2) days' prior written notice
thereof to Donaldson, Lufkin & Jenrette Securities Corporation. The Company
shall, prior to or concurrently with the execution of this Agreement, deliver an
agreement executed by each of the trustees and officers of the Company listed on
Schedule III hereto to the effect that such person will not, during the period
commencing on the date such person signs such agreement and ending 180 days
after the date of the Prospectus, without the prior written consent of
Donaldson, Lufkin & Jenrette Securities Corporation (which shall not be
unreasonably withheld or delayed), (A) engage in any of the transactions
described in the first sentence of this paragraph or (B) make any demand for, or
exercise any right with respect to, the registration of any Common Shares or any
securities convertible into or exercisable, exchangeable or redeemable for
Common Shares (except that the Company may file a shelf registration statement
with the Commission pursuant to the Registration Rights Agreement dated October
14, 1997, as amended)

         SECTION 3. Terms of Public Offering. The Company is advised by you that
the Underwriters propose (i) to make a public offering (the "Offering") of their
respective portions of the Shares as soon after the execution and delivery of
this Agreement as in your judgment is advisable and (ii) initially to offer the
Shares upon the terms set forth in the Prospectus.

         SECTION 4. Delivery and Payment. The Shares shall be represented by
definitive certificates and shall be issued in such authorized denominations and
registered in such names as Donaldson, Lufkin & Jenrette Securities Corporation
shall request no later than two (2) business days prior to the Closing Date or
the applicable Option Closing Date (as defined below), as the case may be. The
Company shall deliver the Shares, with any transfer taxes thereon duly paid, to
Donaldson, Lufkin & Jenrette Securities Corporation through the facilities of
The Depository Trust Company ("DTC"), for the respective accounts of the several
Underwriters, against payment to the Company of the Purchase Price therefor by
wire transfer of Federal or other funds immediately available in New York City.
The certificates representing the Shares shall be made available for inspection
not later than 9:30 A.M., New York City time, on the business day prior to the
Closing Date or the applicable Option Closing Date (as defined below), as the
case may be, at the office of DTC or its designated custodian (the "Designated
Office"). The time and date of delivery and payment for the Firm Shares shall be
9:00 A.M., New York City time, on April __ 1998 or such other time on the same
or such other date as Donaldson, Lufkin & Jenrette Securities Corporation and
the Company shall agree in writing. The time and date of delivery for the Firm
Shares are hereinafter referred to as the "Closing Date." The time and date of
delivery and payment for any Additional Shares to be purchased by the
Underwriters shall be 9:00 A.M., New York City time, on the date specified in
the applicable exercise notice given by you pursuant to Section 2 or such other
time on the same or such other date as Donaldson, Lufkin & Jenrette Securities
Corporation and the Company shall agree in writing. The time and date of
delivery for the Option Shares are hereinafter referred to as an "Option Closing
Date."

         The documents to be delivered on the Closing Date or any Option Closing
Date on behalf of the parties hereto pursuant to Section 8 of this Agreement
shall be delivered at the offices of Rogers & Wells



                                        3


<PAGE>



LLP, 200 Park Avenue, New York, New York 10166 and the Shares shall be delivered
at the Designated Office, all on the Closing Date or such Option Closing Date,
as the case may be.

         SECTION 5. Agreements of the Company and the Operating Partnership. The
Company and the Operating Partnership agree with you as follows:

                  (a) The Company will furnish to the Underwriters and to such
         dealers as you shall specify as many copies of the Prospectus (and of
         any amendment or supplement thereto) as the Underwriters shall
         reasonably request for the purposes contemplated by the Act or the
         Securities Exchange Act of 1934, as amended, and the rules and
         regulations of the Commission thereunder (the "Exchange Act").

                  (b) At any time when the Prospectus is required to be
         delivered under the Act or the Exchange Act in connection with sales of
         Shares, to advise you promptly and, if requested by you, to confirm
         such advice in writing, (i) of the effectiveness of any amendment to
         the Registration Statement, (ii) of the transmittal to the Commission
         for filing of any Prospectus or other supplement or amendment to the
         Prospectus to be filed pursuant to the Act, (iii) of the receipt of any
         comments from the Commission relating to the Registration Statement,
         the Prospectus or any of the transactions contemplated by this
         Agreement, including any request by the Commission for amendments to
         the Registration Statement or amendments or supplements to the
         Prospectus or for additional information, (iv) of the issuance by the
         Commission of any stop order suspending the effectiveness of the
         Registration Statement or of the suspension of qualification of the
         Shares for offering or sale in any jurisdiction, or the initiation of
         any proceeding for such purposes, (v) if the Company is required to
         file a Rule 462(b) Registration Statement after the effectiveness of
         this Agreement, when the Rule 462(b) Registration Statement is filed
         and (vi) of the happening of any event during the period referred to in
         Section 5(d) below which makes any statement of a material fact made in
         the Registration Statement or the Prospectus untrue or which requires
         any additions to or changes in the Registration Statement or the
         Prospectus in order to make the statements therein not misleading. If
         at any time the Commission shall issue any stop order suspending the
         effectiveness of the Registration Statement, the Company will use its
         best efforts to obtain the withdrawal or lifting of such order at the
         earliest possible time.

                  (c) To furnish to you without charge, signed copies of the
         Registration Statement as first filed with the Commission and of each
         amendment to it, including all exhibits, and to furnish to you and each
         Underwriter designated by you such number of conformed copies of the
         Registration Statement as so filed and of each amendment to it, without
         exhibits, as you may reasonably request. If applicable, the copies of
         the Registration Statement and each amendment thereto furnished to the
         Underwriters will be identical to the electronically transmitted copies
         thereof filed with the Commission pursuant to EDGAR, except to the
         extent permitted by Regulation S-T.

                  (d) At any time when the Prospectus is required to be
         delivered under the Act or the Exchange Act in connection with sales of
         Shares, not to file any amendment to the Registration Statement and not
         to make any amendment or supplement to the Prospectus of which you
         shall not previously have been advised or to which you or your counsel
         shall reasonably object after being so advised; and, during such
         period, to prepare and file with the Commission, promptly upon your
         reasonable request, any amendment to the Registration Statement or
         amendment or supplement to the Prospectus which, in the opinion of your
         counsel, may be necessary in connection with the distribution of the
         Shares by you, and to use its best efforts to cause any such

         

                                        4


<PAGE>



         amendment to the Registration Statement to become promptly effective.
         The Prospectus and any amendments or supplements thereto furnished to
         the Underwriters will be identical to the electronically transmitted
         copies thereof filed with the Commission pursuant to EDGAR, except to
         the extent permitted by Regulation S-T.

                  (e) If during the period specified in Section 5(a), any event
         shall occur or condition shall exist as a result of which, in the
         opinion of counsel for the Underwriters, it becomes necessary to amend
         or supplement the Prospectus in order to make the statements therein,
         in the light of the circumstances existing when the Prospectus is
         delivered to a purchaser, not misleading, or if, in the opinion of
         counsel for the Underwriters, it is necessary to amend or supplement
         the Prospectus to comply with applicable law, the Company will
         forthwith prepare and file with the Commission an appropriate amendment
         or supplement to the Prospectus (in form and substance reasonably
         satisfactory to counsel for the Underwriters) so that the statements in
         the Prospectus, as so amended or supplemented, will not contain an
         untrue statement of a material fact or omit to state a material fact
         necessary in order to make the statements therein, in the light of the
         circumstances existing when it is so delivered, misleading, or so that
         the Prospectus will comply with applicable law, and to furnish to each
         Underwriter and to such dealers as you shall specify as many copies
         thereof as such Underwriter or dealer may reasonably request.

                  (f) Prior to any public offering of the Shares, to use its
         best efforts to cooperate with you and counsel for the Underwriters in
         connection with the registration or qualification of the Shares for
         offer and sale by the several Underwriters under the applicable state
         securities or Blue Sky laws and real estate syndication laws of such
         jurisdictions as you may request, to continue such registration or
         qualification in effect so long as required for distribution of the
         Shares and to file such consents to service of process or other
         documents as may be necessary in order to effect such registration or
         qualification; provided, however, the Company will not be required to
         qualify as a foreign corporation, file a general consent to service of
         process in any such jurisdiction, subject itself to taxation in respect
         of doing business in any jurisdiction in which it is not otherwise so
         subject, or provide any undertaking or make any change in its
         declaration of trust or by-laws that the Board of Trustees of the
         Company reasonably determines to be contrary to the best interests of
         the Company and its shareholders. In each jurisdiction in which the
         Shares have been so qualified or registered, the Company will use all
         reasonable efforts to file such statements and reports as may be
         required by the laws of such jurisdiction, to continue such
         qualification or registration in effect for so long a period as the
         Underwriters may reasonably request for the distribution of the Shares
         and to file such consents to service of process or other documents as
         may be necessary in order to effect such qualification or registration;
         provided, however, the Company will not be required to qualify as a
         foreign corporation, file a general consent to service of process in
         any such jurisdiction, subject itself to taxation in respect of doing
         business in any jurisdiction in which it is not otherwise so subject,
         or provide any undertaking or make any change in its declaration of
         trust or by-laws that the Board of Trustees of the Company reasonably
         determines to be contrary to the best interests of the Company and its
         shareholders.

                  (g) To make generally available to the Company's shareholders
         as soon as reasonably practicable but not later than sixty (60) days
         after the close of the period covered thereby (ninety (90) days in the
         event the close of such period is the close of the Company's fiscal
         year), an earnings statement (in form complying with the provisions of
         Rule 158 of the Act) covering a period of at least twelve months after
         the effective date of the Registration Statement (but in no event
         commencing later than ninety (90) days after such date) which shall
         satisfy the provisions of Section 11(a) of the Act, and, if required by
         Rule 158 of the Act, to file such statement as an



                                        5


<PAGE>



         exhibit to the next periodic report required to be filed by the Company
         under the Exchange Act covering the period when such earnings statement
         is released.

                  (h) During the period of five years after the date of this
         Agreement, to furnish to you as soon as available copies of all regular
         and periodic reports or other publicly available information of the
         Company and any of the Subsidiaries (as defined below) furnished to the
         record holders of Common Shares or furnished to or filed with the
         Commission or any national securities exchange on which any class of
         securities of the Company is listed and such other publicly available
         information concerning the Company and the Subsidiaries as you may
         reasonably request.

                  (i) During the period when the Prospectus is required to be
         delivered under the Act or the Exchange Act in connection with sales of
         the Shares, to file all documents required to be filed by it with the
         Commission pursuant to Section 13, 14 or 15 of the Exchange Act within
         the time periods required by the Exchange Act.

                  (j) Whether or not the transactions contemplated in this
         Agreement are consummated or this Agreement is terminated, to pay or
         cause to be paid all expenses, costs, fees and taxes incident to the
         performance of its obligations under this Agreement, including: (i) the
         fees, disbursements and expenses of the Company's counsel and the
         Company's accountants in connection with the registration and delivery
         of the Shares under the Act, (ii) the preparation, printing, filing and
         distribution under the Act of the Registration Statement and any
         amendment thereto (including financial statements and exhibits), any
         preliminary prospectus, the Prospectus and all amendments and
         supplements to any of the foregoing, including the mailing and
         delivering of copies thereof to the Underwriters and dealers in the
         quantities specified herein, (iii) all costs of printing and delivery
         of this Agreement, (iv) all expenses in connection with the
         registration or qualification of the Shares for offer and sale under
         the securities or Blue Sky laws of the several states and the real
         estate syndication laws of the several states in accordance with
         Section 5(f) hereof, and all costs of printing or producing any
         Preliminary and Supplemental Blue Sky Memoranda in connection therewith
         (v) the filing fees and disbursements of counsel for the Underwriters
         in connection with the review and clearance of the offering of the
         Shares, if any, by the National Association of Securities Dealers, Inc.
         (the "NASD"), (vi) all fees and expenses in connection with the
         preparation and filing of the registration statement on Form 8-A
         relating to the Common Shares and all costs and expenses incident to
         the listing of the Shares on the New York Stock Exchange, Inc. (the
         "NYSE"), (vii) the cost of printing, issuing and delivering
         certificates representing the Shares to the Underwriters, (viii) the
         cost and charges of any transfer agent, registrar and/or depositary,
         (ix) furnishing such copies of the Registration Statement, the
         Prospectus and all amendments supplements thereto as may be requested
         for use in connection with the offering or sale of the Shares by the
         Underwriters or by dealers to whom Shares may be sold, (x) any transfer
         taxes imposed on the sale by the Company of the Shares to the
         Underwriters [and (xi) any expenses incurred by the Company in
         connection with a "road show" presentation for potential investors].

                  (k) To use its best efforts to list for quotation the Shares
         on the NYSE and to maintain the listing of the Shares on the NYSE for a
         period of two years after the Closing Date and thereafter unless the
         Company's Board of Trustees determines that it is no longer in the best
         interests of the Company for the Shares to continue to be so listed.

                  (l) To use its best efforts to do and perform all things
         required to be done and performed under this Agreement by the Company
         or the Operating Partnership prior to the



                                        6


<PAGE>



         Closing Date or any Option Closing Date, as the case may be, and to
         satisfy all conditions precedent to the delivery of the Shares.

                  (m) If the Registration Statement at the time of the
         effectiveness of this Agreement does not cover all of the Shares, to
         file a Rule 462(b) Registration Statement with the Commission
         registering the Shares not so covered in compliance with Rule 462(b) by
         10:00 P.M., New York City time, on the date of this Agreement and to
         pay to the Commission the filing fee for such Rule 462(b) Registration
         Statement at the time of the filing thereof or to give irrevocable
         instructions for the payment of such fee pursuant to Rule 111(b) under
         the Act.

                  (n) The Company will prepare and file or transmit for filing
         with the Commission in accordance with Rule 424(b) of the Act copies of
         the Prospectus.

                  (o) The Company will use its best efforts to continue to
         qualify as a "real estate investment trust" ("REIT") under Sections 856
         through 860 of the Internal Revenue Code of 1986, as amended (the
         "Code") unless the Company's Board of Trustees determines that it is no
         longer in the best interests of the Company to be so qualified.

                  (p) The Company will use the net proceeds received by it from
         the sale of the Shares in the manner specified in the Prospectus under
         "Use of Proceeds."

                  (q) The Company will not at any time, directly or indirectly,
         take any action intended, or which might reasonably be expected, to
         cause or result in, or which will constitute, stabilization or the
         price of the Shares to facilitate the sale or resale of any of the
         Shares in violation of the Act.

         SECTION 6. Representations and Warranties of the Company and the
Operating Partnership. The Company and the Operating Partnership represent and
warrant to each Underwriter that:

                  (a) The Registration Statement has become effective (other
         than any Rule 462(b) Registration Statement to be filed by the Company
         after the effectiveness of this Agreement); any Rule 462(b)
         Registration Statement filed after the effectiveness of this Agreement
         will be filed no later than 10:00 A.M., New York City time, on the day
         after the date of this Agreement.

                  (b) The Registration Statement and the Prospectus, including
         the financial statements, schedules and related notes included in the
         Prospectus, as of the date hereof and at the time the Registration
         Statement became effective, and when any post-effective amendment to
         the Registration Statement becomes effective or any amendment or
         supplement to the Prospectus is filed with the Commission, did or will
         comply in all material respects with all applicable provisions of the
         Act and will contain all statements required to be stated therein in
         accordance with the Act. The Prospectus, including the financial
         statements, schedules and related notes included in the Prospectus, as
         of the date hereof and at the time the Registration Statement became
         effective, and at the Closing Date, and when any post-effective
         amendment to the Registration Statement becomes effective or any
         amendment or supplement to the Prospectus is filed with the Commission,
         did or will comply in all material respects with all applicable
         provisions of the Act and will contain all statements required to be
         stated therein in accordance with the Act. On the date the Registration
         Statement was declared effective, on the date hereof and on the Closing
         Date no part of the Registration Statement or any amendment did or will
         contain an untrue statement of a material fact or omit to state a
         material fact required to be stated



                                        7


<PAGE>



         therein or necessary in order to make the statements therein not
         misleading. On the date the Registration Statement was declared
         effective, on the date hereof, as of its date, and at the Closing Date,
         the Prospectus did not or will not contain any untrue statement of a
         material fact or omit to state a material fact necessary to make the
         statements therein, in the light of the circumstances under which they
         were made, not misleading. The foregoing representations and warranties
         in this Section 6(b) do not apply to any statements or omissions made
         in reliance on and in conformity with information relating to any
         Underwriter furnished in writing to the Company by such Underwriter
         specifically for inclusion in the Registration Statement or Prospectus
         or any amendment or supplement thereto. The Company has not
         distributed, and prior to the later of the Closing Date and the
         completion of the distribution of the Shares, will not distribute, any
         offering material in connection with the offering or sale of the Shares
         other than the Registration Statement, the Prospectus or any other
         materials, if any, permitted by the Act (which were disclosed to the
         Underwriters and the Underwriters' counsel). The Prospectus delivered
         to the Underwriters for use in connection with the offering of Shares
         will, at the time of such delivery, be identical to the electronically
         transmitted copies thereof filed with the Commission pursuant to EDGAR,
         except to the extent permitted by Regulation S-T.

                  (c) Each of the Company and its subsidiaries listed on
         Schedule II hereto (the "Subsidiaries") has been duly formed, is
         validly existing as a corporation, limited partnership or other legal
         entity, as the case may be, in good standing under the laws of its
         jurisdiction of formation and has, and at the Closing Date will have,
         the requisite corporate, trust or partnership power and authority to
         carry on its business as described in the Registration Statement or the
         Prospectus and to enter into and perform the transactions contemplated
         hereby and thereby to be entered into and performed by it and to own,
         lease and operate its properties and other assets owned, leased or
         operated by it, and each is, and at the Closing Date will be, duly
         qualified and is in good standing as a foreign corporation, limited
         partnership or other legal entity, as the case may be, authorized to do
         business in each jurisdiction in which the nature of its business or
         its ownership or leasing of property requires such qualification,
         except where the failure to have such power and authority and to be so
         qualified and in good standing would not reasonably be expected to have
         a material adverse effect on (i) the business, affairs, prospects,
         management, condition, financial or otherwise, results of operations of
         the Company and its Subsidiaries, taken as a whole, (ii) the issuance,
         validity or enforceability of the Shares or (iii) the consummation of
         any of the transactions contemplated by this Agreement to be performed
         by the Company and the Subsidiaries (individually or collectively, a
         "Material Adverse Effect"). Complete and correct copies of the
         declaration of trust and of the by-laws of the Company, the certificate
         of limited partnership and agreement of limited partnership of the
         Operating Partnership and the charter documents, partnership agreements
         and other organizational documents of the other Subsidiaries, as
         applicable, and all amendments thereto as have been requested by the
         Underwriters or their counsel have been delivered to the Underwriters
         or their counsel. As of the Closing Date, the partnership agreement of
         the Operating Partnership will have been duly authorized, executed and
         delivered by the Company, as the general partner and as a limited
         partner and (assuming it has been duly authorized, executed and
         delivered by each of the other parties thereto and is a legal, valid
         and binding agreement of each such other party) will be valid, legally
         binding and enforceable in accordance with its terms subject to (i) the
         effect of bankruptcy, insolvency, fraudulent conveyance,
         reorganization, moratorium or other similar laws now or hereafter in
         effect relating to or affecting the rights and remedies of creditors,
         (ii) the effect of general principles of equity, whether enforcement is
         considered in a proceeding in equity or at law, and the discretion of
         the court before which any proceeding therefore may be brought and
         (iii) the provisions of the Delaware Revised Uniform Limited
         partnership Act (the "Delaware Act").



                                        8


<PAGE>



                  (d) All the outstanding shares of beneficial interest of the 
         Company have been duly authorized and validly issued and are fully 
         paid, non-assessable and not subject to any preemptive or similar 
         rights and have been offered and sold in compliance, in all material 
         respects, with all applicable laws (including, without limitation, 
         federal or state securities laws); and the Shares have been duly 
         authorized and, when issued and delivered to the Underwriters against 
         payment therefor as provided by this Agreement, will be validly issued,
         fully paid and non-assessable, and the issuance of such Shares will 
         not be subject to any preemptive or similar rights and will have been 
         offered and sold in compliance, in all material respects, with all 
         applicable laws (including, without limitation, federal or state 
         securities laws). The description of the Shares, and the statements 
         related thereto, contained in the Registration Statement and the 
         Prospectus are, and at the Closing Date, will be, complete and 
         accurate in all material respects. Except for stock options under the
         Company's Option Plan and Incentive Plan (as defined in the 
         Prospectus), outstanding Units to be issued in connection with the 
         Retained Interests (as defined in the Prospectus), or as described 
         in the Prospectus, the Company does not have outstanding, and at the 
         Closing Date will not have outstanding, any options to purchase, or 
         any rights or warrants to subscribe for, or any securities or 
         obligations convertible into, redeemable or exchangeable for, or any 
         contracts or commitments to issue or sell, any Shares, any shares of 
         capital stock of the Company or any Subsidiary or any such warrants, 
         convertible securities or obligations. Upon payment of the Purchase 
         Price and delivery of certificates representing the Shares in 
         accordance herewith, the Underwriters will receive good, valid and 
         marketable title to the Shares, free and clear of all security 
         interests, mortgages, pledges, liens, encumbrances, claims and 
         equities. The form of share certificates to be used to evidence the
         Shares will be in due and proper form and will comply, in all material
         respects, with all applicable legal requirements. Other than shares 
         of beneficial interest issuable upon exercise of share options pursuant
         to the Company's Option Plan and Incentive Plan (as defined in the 
         Prospectus), upon the redemption of Units, or in connection with the 
         Retained Interests, no shares of beneficial interest of the Company are
         reserved for any purpose, except as disclosed in the Prospectus.

                  (e) Except as disclosed in the Registration Statement, all of
         the outstanding shares of capital stock, units of limited partnership
         or other equity interests, as the case may be, of each of the
         Subsidiaries have been duly authorized and validly issued and, in the
         case of Subsidiaries which are corporations, are fully paid and
         non-assessable, and are owned by the Company (except Units to be issued
         in exchange for the Retained Interests), directly or indirectly through
         one or more Subsidiaries, free and clear of any security interest,
         claim, lien, encumbrance or adverse interest of any nature.

                  (f) The authorized shares of beneficial interest of the 
         Company conform as to legal matters to the description thereof 
         contained in the Prospectus.

                  (g) Neither the Company nor any of the Subsidiaries is in
         violation of its respective declaration of trust, charter, by-laws,
         partnership agreement or other organizational document, as the case may
         be, or in default in the performance of any obligation, agreement,
         covenant or condition contained in any indenture, loan agreement,
         mortgage, bond, debenture, note agreement, joint venture or partnership
         agreement, lease or other agreement or instrument that is material to
         the Company and the Subsidiaries, taken as a whole, and to which the
         Company or any of the Subsidiaries is a party or by which the Company
         or any of the Subsidiaries or their respective property is bound, where
         such violation or default would have a Material Adverse Effect.



                                        9


<PAGE>



                  (h) The execution, delivery and performance of this Agreement
         by the Company and the Operating Partnership, the compliance by the
         Company and the Operating Partnership with all the provisions hereof
         and the consummation by the Company and the Operating Partnership of
         the transactions contemplated hereby to be performed by them will not
         (i) require any material governmental license, permit, consent,
         approval, authorization or other order of, or qualification with, any
         court or governmental body or agency (except such as have been obtained
         or may be required under the Act and the Exchange Act, securities, Blue
         Sky or real estate syndication laws of the various states, the by-laws
         and rules of the NASD or the requirements of the NYSE), (ii) conflict
         with or constitute a breach of any of the terms or provisions of, or a
         default under, the charter, declaration of trust, by-laws, partnership
         agreement or other organizational document of the Company or any of the
         Subsidiaries or in the performance or observance of any obligation,
         covenant, agreement or condition contained in any indenture, loan
         agreement, mortgage, bond, debenture, note agreement, joint venture or
         partnership agreement, lease or other agreement or instrument that is
         material to the Company and the Subsidiaries, taken as a whole, to
         which the Company or any of the Subsidiaries is a party or by which the
         Company or any of the Subsidiaries or their respective property is
         bound or, (iii) violate or conflict with any applicable law or any
         rule, regulation, judgment, order, administrative regulation or decree
         of any court or any governmental body or agency having jurisdiction
         over the Company, any of the Subsidiaries or their respective property.

                  (i) Each of the Company and the Operating Partnership has full
         trust or partnership power, as the case may be, to enter into this
         Agreement, to the extent it is a party thereto. This Agreement has been
         duly and validly authorized, executed and delivered by the Company and
         the Operating Partnership, and constitutes a valid and binding
         agreement of the Company and the Operating Partnership, and assuming
         due authorization, execution and delivery by the Underwriters, is
         enforceable, against the Company and the Operating Partnership, in
         accordance with the terms hereof subject to (i) the effect of
         bankruptcy, insolvency, fraudulent conveyance, reorganization,
         moratorium or other similar laws now or hereafter in effect relating to
         or affecting the rights and remedies of creditors and (ii) the effect
         of general principles of equity, whether enforcement is considered in a
         proceeding in equity or at law, and the discretion of the court before
         which any proceeding therefor may be brought. The execution, delivery
         and performance by the Company and the Operating Partnership of this
         Agreement and the consummation by the Company and the Operating
         Partnership of the transactions contemplated hereby to be performed by
         them and the compliance by each of the Company and the Operating
         Partnership with their obligations hereunder, will not result in the
         creation or imposition of any lien, charge or encumbrance upon any of
         the assets or properties of the Company or any of the Subsidiaries
         pursuant to the terms or provisions of, or result in a breach or
         violation of any of the terms or provisions of, or constitute a default
         under, or give any other party a right to terminate any of its
         obligations under, or result in the acceleration of any obligation
         under, the certificate of incorporation, declaration of trust, by-laws,
         partnership agreement or other organizational documents of the Company
         or any of the Subsidiaries, any indenture, loan agreement, mortgage,
         bond, debenture, note agreement, joint venture or partnership
         agreement, lease or other agreement or instrument that is material to
         the Company and the Subsidiaries, taken as a whole, and to which the
         Company or any of the Subsidiaries is a party or by which the Company
         or any of the Subsidiaries or their respective assets or properties is
         bound or affected, or violate or conflict with any judgment, ruling,
         decree, order, statute, rule or regulation of any court or other
         governmental agency (foreign or domestic) or body applicable to the
         business or properties of the Company or any of the Subsidiaries or to
         the properties, in each case except for liens, charges, encumbrances,
         breaches, violations, defaults, rights to terminate or accelerate



                                       10


<PAGE>



         obligations, or conflicts, the imposition or occurrence of which would
         not have a Material Adverse Effect.

                  (j) As of the Closing Date, the Company and each of the
         Subsidiaries will have good and marketable title to all material
         properties and assets described in the Prospectus as owned by it, free
         and clear of all liens, encumbrances, claims, security interests and
         defects, except such as are described in the Registration Statement or
         the Prospectus, or such as secure any indebtedness of the Company
         and/or the Subsidiaries, except where the failure to have such title
         would not result in a Material Adverse Effect.

                  (k) To the knowledge of the Company and the Operating
         Partnership: (i) no lessee of any portion of the Properties is in
         default under any of the leases governing such properties and there is
         no event which, but for the passage of time or the giving of notice, or
         both, would constitute a default under any of such leases, except in
         each case such defaults that would not have a Material Adverse Effect;
         (ii) the current use and occupancy of each of the properties complies
         in all material respects with all applicable codes and zoning laws and
         regulations, except for such failures to comply which would not
         individually or in the aggregate have a Material Adverse Effect; and
         (iii) there is no pending or threatened condemnation, zoning change,
         environmental or other proceeding or action that will in any material
         respect affect the size of, use of, improvements on, construction on,
         or access to the properties except such proceedings or actions that
         would not have a Material Adverse Effect.

                  (l) The Company and each of the Subsidiaries has property,
         title, casualty and liability insurance from insurers of recognized
         financial responsibility in favor of the Company with respect to each
         of the properties, in an amount and on such terms as is reasonable and
         customary for businesses of the type conducted by the Company and the
         Operating Partnership except in such instances where the tenant is
         carrying such insurance or the tenant is self-insuring such risks;

                  (m) To the knowledge of the Company, there are no legal or
         governmental proceedings pending against or threatened against the
         Company or any of the Subsidiaries or any of their respective officers
         or trustees in their capacity as such or assets before or any of their
         respective property before or by any federal or state court,
         commission, regulatory body, administrative agency or other
         governmental body, domestic or foreign having jurisdiction over the
         Company, any of its Subsidiaries or assets that are required to be
         described in the Registration Statement or the Prospectus and are not
         so described wherein an unfavorable ruling decision or finding would
         reasonably be expected to have a Material Adverse effect; nor are there
         any statutes, regulations, contracts or other documents that are
         required to be described in the Registration Statement or the
         Prospectus or to be filed as exhibits to the Registration Statement
         that are not so described or filed as required, and the descriptions
         thereof or references thereto are accurate in all material respects.

                  (n) Except for activities, conditions, circumstances or
         matters that would not have a Material Adverse Effect, (A) to the
         knowledge of the Company, after due inquiry, neither the Company nor
         any of the Subsidiaries has violated (i) any foreign, federal, state or
         local law or regulation relating to the protection of human health and
         safety, the environment or hazardous or toxic substances or wastes,
         pollutants or contaminants ("Environmental Laws") (and the Company and
         the Subsidiaries are in compliance with all requirements of applicable
         permits, licenses, approvals or other Authorizations issued pursuant to
         Environmental Laws), (ii) any provisions of the Employee Retirement
         Income Security Act of 1974, as amended or (iii) any



                                       11


<PAGE>



         provisions of the Foreign Corrupt Practices Act, or the rules and
         regulations promulgated thereunder, (B) to the knowledge of the Company
         and the Subsidiaries, after due inquiry, none of the Company or the
         Subsidiaries has caused or suffered to occur any Release (as defined
         below) of any Hazardous Substance (as defined below) into the
         Environment (as defined below) on, in, under or from any property, and
         no condition exists on, in, under or adjacent to any property that
         would reasonably be expected to result in the incurrence of liabilities
         under, or any violations of, any Environmental Law or give rise to the
         imposition of any Lien (as defined below), under any Environmental Law;
         (C) none of the Company or the Subsidiaries has received any written
         notice of a material claim under or pursuant to any Environmental Law
         or under common law pertaining to Hazardous Substances on, in, under or
         originating from any property; (D) none of the Company or any of the
         Subsidiaries has actual knowledge of, or received any written notice
         from any Governmental Authority (as defined below) claiming, any
         material violation of any Environmental Law or a determination to
         undertake and/or request the investigation, remediation, clean-up or
         removal of any Hazardous Substance released into the Environment on,
         in, under or from any property; and (E) no property is included or, to
         the knowledge of the Company and the Subsidiaries, after due inquiry,
         proposed for inclusion on the National Priorities List issued pursuant
         to CERCLA (as defined below) by the United States Environmental
         Protection Agency (the "EPA"), or included on the Comprehensive
         Environmental Response, Compensation, and Liability Information System
         database maintained by the EPA, and none of the Company and the
         Subsidiaries has actual knowledge that any property has otherwise been
         identified in a published writing by the EPA as a potential CERCLA
         removal, remedial or response site or, to the knowledge of the Company
         and the Subsidiaries, is included on any similar list of potentially
         contaminated sites pursuant to any other Environmental Law.

                  As used herein, "Hazardous Substance" shall include any
         hazardous substance, hazardous waste, toxic substance, pollutant or
         hazardous material, including, without limitation, oil, petroleum or
         any petroleum-derived substance or waste, asbestos or
         asbestos-containing materials, PCBs, pesticides, explosives,
         radioactive materials, dioxins, urea formaldehyde insulation or any
         constituent of any such substance, pollutant or waste which is subject
         to regulation under any Environmental Law (including, without
         limitation, materials listed in the United States Department of
         Transportation Optional Hazardous Material Table, 49 C.F.R. Section
         172.101, or in the EPA's List of Hazardous Substances and Reportable
         Quantities, 40 C.F.R. Part 302); "Environment" shall mean any surface
         water, drinking water, ground water, land surface, subsurface strata,
         river sediment, buildings, structures, and ambient, workplace and
         indoor and outdoor air; "Environmental Law" shall mean the
         Comprehensive Environmental Response, Compensation and Liability Act of
         1980, as amended (42 U.S.C. Section 9601 et seq.) ("CERCLA"), the
         Resource Conservation and Recovery Act of 1976, as amended (42 U.S.C.
         Section 6901, et seq.), the Clean Air Act, as amended (42 U.S.C.
         Section 7401, et seq.), the Clean Water Act, as amended (33 U.S.C.
         Section 1251, et seq.), the Toxic Substances Control Act, as amended
         (15 U.S.C. Section 2601, et seq.), the Occupational Safety and Health
         Act of 1970, as amended (29 U.S.C. Section 651, et seq.), the Hazardous
         Materials Transportation Act, as amended (49 U.S.C. Section 1801, et
         seq.), and all other federal, state and local laws, ordinances,
         regulations, rules and orders relating to the protection of the
         environment or of human health from environmental effects;
         "Governmental Authority" shall mean any federal, state or local
         governmental office, agency or authority having the duty or authority
         to promulgate, implement or enforce any Environmental Law; "Lien" shall
         mean, with respect to any property, any mortgage, deed of trust,
         pledge, security interest, lien, encumbrance, penalty, fine, charge,
         assessment, judgment or other liability in, on or affecting such
         property; and "Release" shall mean any spilling, leaking, pumping,
         pouring, emitting, emptying, discharging, injecting, escaping,
         leaching, dumping, emanating or disposing of any Hazardous Substance
         into the Environment, including, without limitation, the abandonment or



                                       12


<PAGE>



         discard of barrels, containers, tanks (including, without limitation,
         underground storage tanks) or other receptacles containing or
         previously containing and containing a residue of any Hazardous
         Substance.

                  (o) To the knowledge of the Company, none of the environmental
         consultants which prepared environmental and asbestos inspection
         reports with respect to any of the properties was employed for such
         purpose on a contingent basis or has any substantial interest in the
         Company or any of the Subsidiaries, and none of them nor any of their
         directors, officers or employees is connected with the Company or any
         of the Subsidiaries as a promoter, selling agent, voting trustee,
         director, officer or employee.

                  (p) The Company and the Subsidiaries are organized and operate
         in a manner so as to qualify as a REIT under Sections 856 through 860
         of the Code, and have elected to be taxed as a REIT under the Code
         commencing with the taxable year ending December 31, 1994. The Company
         and the Subsidiaries intend to continue to qualify as a REIT for the
         foreseeable future and their proposed operations will allow the Company
         and the Subsidiaries to continue to qualify as a REIT.

                  (q) Each of the Company and the Subsidiaries has such permits,
         licenses, consents, exemptions, franchises, authorizations and other
         approvals (each, an "Authorization") as are necessary to own, lease,
         license and operate its respective properties and to conduct its
         business as contemplated in the Prospectus and are in material
         compliance with such Authorizations and has complied in all material
         respects with the laws, regulations and orders applicable to it or its
         business except where the failure to have or be in compliance with any
         such Authorization would not, singly or in the aggregate, have a
         Material Adverse Effect.

                  (r) Coopers & Lybrand L.L.P. are independent public
         accountants with respect to the Company and the Subsidiaries as
         required by the Act.

                  (s) The consolidated financial statements included in the
         Registration Statement and the Prospectus (and any amendment or
         supplement thereto), together with related schedules and notes, comply
         in all material respects with the requirements of the Act and present
         fairly the consolidated financial position, results of operations and
         changes in financial position of the Company and the Subsidiaries on
         the basis stated therein at the respective dates or for the respective
         periods to which they apply; such statements and related schedules and
         notes have been prepared in accordance with generally accepted
         accounting principles consistently applied throughout the periods
         involved, except as disclosed therein; the supporting schedules, if
         any, included in the Registration Statement present fairly in
         accordance with generally accepted accounting principles the
         information required to be stated therein; and the other financial and
         statistical information and data included in the Registration Statement
         and the Prospectus (and any amendment or supplement thereto) are, in
         all material respects, accurately presented and prepared on a basis
         consistent with such financial statements and the books and records of
         the Company. Except as otherwise noted in the Prospectus, pro forma
         and/or as adjusted financial information included in the Prospectus has
         been prepared in accordance with the applicable requirements of the Act
         and the American Institute of Certified Public Accountants ("AICPA")
         guidelines with respect to pro forma and as adjusted financial
         information, and includes all adjustments necessary to present fairly
         the pro forma and/or as adjusted financial condition of the Company and
         the Subsidiaries presented or included at the respective dates
         indicated and the results of operations and cash flows for the
         respective periods specified. No other financial statements (or
         schedules)



                                       13


<PAGE>



         of the Company, or any predecessor of the Company are required by the
         Act to be included in the Registration Statement or the Prospectus.

                  (x) Neither the Company nor any of the Subsidiaries is and,
         after giving effect to the offering and sale of the Shares and the
         application of the proceeds thereof as described in the Prospectus,
         will not be, an "investment company" as such term is defined in the
         Investment Company Act of 1940, as amended.

                  (u) Except as otherwise provided for in the Prospectus, [or
         pursuant to agreements described in the Prospectus under the caption
         "Summary Business Objectives and Growth Strategies-Potential
         Acquisitions"] there are no contracts or agreements between the Company
         and any person granting such person the right to require the Company to
         file a registration statement under the Act with respect to any
         securities of the Company or to require the Company to include such
         securities with the Shares registered pursuant to the Registration
         Statement.

                  (v) Since the respective dates as of which information is
         given in the Registration Statement and the Prospectus other than as
         set forth in or contemplated by the Registration Statement and the
         Prospectus (exclusive of any amendments or supplements thereto
         subsequent to the date of this Agreement) and prior to the Closing
         Date, except for changes of a general nature applicable to all real
         estate investment trusts, (i) there has not occurred any material
         adverse change or any development involving a prospective material
         adverse change in the condition, financial or otherwise, or the results
         of operations, business, prospects, management or operations of the
         Company and the Subsidiaries, taken as a whole, (ii) there has been no
         casualty loss or condemnation or other adverse event with respect to
         any of the properties which would be material to the Company or the
         Subsidiaries, (iii) there has not been any material adverse change or
         any development involving a prospective material adverse change in the
         capitalization, long-term or short-term debt or in the capital stock or
         equity of the Company or any of the Subsidiaries, (iv) except as
         described in the Prospectus, neither the Company nor any of the
         Subsidiaries has incurred any material liability or obligation, direct
         or contingent, which would be material, nor have they entered into any
         transactions, other than pursuant to this Agreement and the
         transactions referred to herein or as contemplated in the Prospectus,
         which would be material, to the Company and its Subsidiaries taken as a
         whole, and (v) except for regular quarterly distributions on the
         Shares, the Company has not paid or declared and will not pay or
         declare any dividends or other distributions of any kind on any class
         of its shares of beneficial interest.

                  (w) Each certificate signed by any officer or authorized
         representative of the Company or any Subsidiary, and delivered to the
         Underwriters or counsel for the Underwriters shall be deemed to be a
         representation and warranty by the Company or any Subsidiary, as the
         case may be, to the Underwriters as to the matters covered thereby.

                  (x) Prior to the Closing Date, the Common Shares will be duly
         authorized for listing on the NYSE upon official notice of issuance.

                  (y) Neither the Company nor any of the Subsidiaries is
         involved in any labor dispute nor, to the knowledge of the Company or
         the Subsidiaries, is any such dispute threatened which would have a
         Material Adverse Effect.

                  (zz) The Company and the Subsidiaries own, or are licensed or
         otherwise have the full exclusive right to use, all material trademarks
         and trade names which are used in or



                                       14


<PAGE>



         necessary for the conduct of their respective businesses as described
         in the Prospectus. To the knowledge of the Company, no claims have been
         asserted by any person to the use of any such trademarks or trade names
         or challenging or questioning the validity or effectiveness of any such
         trademark or trade name. The use, in connection with the business and
         operations of the Company and its subsidiaries, of such trademarks and
         trade names does not, to the Company's knowledge, infringe on the
         rights of any person.

                  (aa) The Company and each of the Subsidiaries has filed all
         federal, state, local and foreign income tax returns which have been
         required to be filed (except in any case in which the failure to so
         file would not result in a Material Adverse Effect) and has paid all
         taxes required to be paid and any other assessment, fine or penalty
         levied against it, to the extent that any of the foregoing would
         otherwise be delinquent, except, in all cases, for any such tax,
         assessment, fine or penalty that is being contested in good faith and
         except in any case in which the failure to so pay would not result in a
         Material Adverse Effect.

                  (bb) The Company has timely filed all documents required to be
         filed by it under the Exchange Act.

                  (cc) No relationship, direct or indirect, exists between or
         among the Company or the Subsidiaries on the one hand, and the
         trustees, directors, officers, shareholders, customers or suppliers of
         the Company or the Subsidiaries on the other hand, which is required by
         the Act to be described in the Registration Statement and the
         Prospectus which is not so described.

                  (dd) The Company maintains a system of internal accounting
         controls sufficient to provide reasonable assurances that (i)
         transactions are executed in accordance with management's general or
         specific authorization; (ii) transactions are recorded as necessary to
         permit preparation of financial statements in conformity with generally
         accepted accounting principles and to maintain accountability for
         assets; (iii) access to assets, financial and corporate books and
         records is permitted only in accordance with management's general or
         specific authorization; and (iv) the recorded accountability for assets
         is compared with existing at reasonable intervals and appropriate
         action is taken with respect to any differences.

                  (ee) No stop order suspending the effectiveness of the
         Registration Statement or any part thereof has been issued and no
         proceeding for that purpose has been instituted, or to the knowledge of
         the Company, threatened by the Commission or by the state securities
         authority of any jurisdiction. No order preventing or suspending the
         use of the Prospectus has been issued and no proceeding for that
         purpose has been instituted or, to the knowledge of the Company,
         threatened by the Commission or by the state securities authority of
         any jurisdiction.

                  (ff) Except as otherwise provided in the Prospectus under
         "Summary-Business Objectives and Growth Strategies-Potential
         Acquisitions," there are no contracts, agreements, letters of intent,
         understandings or any other documents relating to the acquisition of
         any real property by the Company or the Operating Partnership (other
         than in respect of the Retained Interests).

         SECTION 7. Indemnification. (a) The Company agrees to indemnify and
hold harmless each Underwriter, its directors, its officers and each person, if
any, who controls any Underwriter within the meaning of Section 15 of the Act or
Section 20 of the Exchange Act from and against any and all losses, claims,
damages, liabilities and judgments (including, without limitation, any
reasonable legal or other expenses incurred in connection with investigating or
defending any matter, including any action, that



                                       15


<PAGE>



could give rise to any such losses, claims, damages, liabilities or judgments)
caused by any untrue statement or alleged untrue statement of a material fact
contained in the Registration Statement (or any amendment thereto), the
Prospectus (or any amendment or supplement thereto) or any preliminary
prospectus, or caused by any omission or alleged omission to state therein a
material fact required to be stated therein or necessary to make the statements
therein not misleading, except insofar as such losses, claims, damages,
liabilities or judgments are caused by any such untrue statement or omission or
alleged untrue statement or omission based upon and in conformity with the
information relating to any Underwriter furnished in writing to the Company by
such Underwriter through you expressly for use therein; provided, however, that
the foregoing indemnity agreement with respect to any preliminary prospectus
shall not inure to the benefit of any Underwriter who failed to deliver a
Prospectus (as then amended or supplemented, provided by the Company to the
several Underwriters in the requisite quantity and on a timely basis to permit
proper delivery on or prior to the Closing Date) to the person asserting any
losses, claims, damages and liabilities and judgments caused by any untrue
statement or alleged untrue statement of a material fact contained in any
preliminary prospectus, or caused by any omission or alleged omission to state
therein a material fact required to be stated therein or necessary to make the
statements therein not misleading, if such material misstatement or omission or
alleged material misstatement or omission was cured in such Prospectus and such
Prospectus was required by law to be delivered at or prior to the written
confirmation of sale to such person.

                  (b) Each Underwriter agrees, severally and not jointly, to
indemnify and hold harmless the Company, its trustees, its officers who sign the
Registration Statement and each person, if any, who controls the Company within
the meaning of Section 15 of the Act or Section 20 of the Exchange Act, to the
same extent as the foregoing indemnity from the Company to such Underwriter but
only with reference to information relating to such Underwriter furnished in
writing to the Company by such Underwriter through you expressly for use in the
Registration Statement (or any amendment thereto), the Prospectus (or any
amendment or supplement thereto) or any preliminary prospectus.

                  (c) In case any action shall be commenced involving any person
in respect of which indemnity may be sought pursuant to Section 7(a) or 7(b)
(the "indemnified party"), the indemnified party shall promptly notify the
person against whom such indemnity may be sought (the "indemnifying party") in
writing and the indemnifying party shall assume the defense of such action,
including the employment of counsel reasonably satisfactory to the indemnified
party and the payment of all reasonable fees and expenses of such counsel, as
incurred (except that in the case of any action in respect of which indemnity
may be sought pursuant to both Sections 7(a) and 7(b), the Underwriter shall not
be required to assume the defense of such action pursuant to this Section 7(c),
but may employ separate counsel and participate in the defense thereof, but the
reasonable fees and expenses of such counsel, except as provided below, shall be
at the expense of such Underwriter). Any indemnified party shall have the right
to employ separate counsel in any such action and participate in the defense
thereof, but the reasonable fees and expenses of such counsel shall be at the
expense of the indemnified party unless (i) the employment of such counsel shall
have been specifically authorized in writing by the indemnifying party, (ii) the
indemnifying party shall have failed to assume the defense of such action or
employ counsel reasonably satisfactory to the indemnified party or (iii) the
named parties to any such action (including any impleaded parties) include both
the indemnified party and the indemnifying party, and the indemnified party
shall have been advised by such counsel that there may be one or more legal
defenses available to it which are different from or additional to those
available to the indemnifying party (in which case the indemnifying party shall
not have the right to assume the defense of such action on behalf of the
indemnified party). In any such case, the indemnifying party shall not, in
connection with any one action or separate but substantially similar or related
actions in the same jurisdiction arising out of the same general allegations or
circumstances, be liable for the fees and expenses of more than one separate
firm of attorneys (in addition to any local counsel) for all indemnified parties
and all such reasonable fees and expenses shall



                                       16


<PAGE>



be reimbursed as they are incurred. Such firm shall be designated in writing by
Donaldson, Lufkin & Jenrette Securities Corporation, in the case of parties
indemnified pursuant to Section 7(a), and by the Company, in the case of parties
indemnified pursuant to Section 7(b). The indemnifying party shall indemnify and
hold harmless the indemnified party from and against any and all losses, claims,
damages, liabilities and judgments by reason of any settlement of any action (i)
effected with its written consent or (ii) effected without its written consent
if the settlement is entered into more than thirty (30) business days after the
indemnifying party shall have received a request from the indemnified party for
reimbursement for the reasonable fees and expenses of counsel (in any case where
such fees and expenses are at the expense of the indemnifying party) and, prior
to the date of such settlement, the indemnifying party shall have failed to
comply with such reimbursement request. No indemnifying party shall, without the
prior written consent of the indemnified party, effect any settlement or
compromise of, or consent to the entry of judgment with respect to, any pending
or threatened action in respect of which the indemnified party is or could have
been a party and indemnity or contribution may be or could have been sought
hereunder by the indemnified party, unless such settlement, compromise or
judgment (i) includes an unconditional release of the indemnified party from all
liability on claims that are or could have been the subject matter of such
action and (ii) do not include a statement as to or an admission of fault,
culpability or a failure to act, by or on behalf of the indemnified party.

                  (d) To the extent the indemnification provided for in this
Section 7 is unavailable to an indemnified party or insufficient in respect of
any losses, claims, damages, liabilities or judgments referred to therein, then
each indemnifying party, in lieu of indemnifying such indemnified party, shall
contribute to the amount paid or payable by such indemnified party as a result
of such losses, claims, damages, liabilities and judgments (i) in such
proportion as is appropriate to reflect the relative benefits received by the
Company on the one hand and the Underwriters on the other hand from the offering
of the Shares or (ii) if the allocation provided by clause 7(d)(i) above is not
permitted by applicable law, in such proportion as is appropriate to reflect not
only the relative benefits referred to in clause 7(d)(i) above but also the
relative fault of the Company on the one hand and the Underwriters on the other
hand in connection with the statements or omissions which resulted in such
losses, claims, damages, liabilities or judgments, as well as any other relevant
equitable considerations. The relative benefits received by the Company on the
one hand and the Underwriters on the other hand shall be deemed to be in the
same proportion as the total net proceeds from the offering (after deducting
underwriting discounts and commissions, but before deducting expenses) received
by the Company, and the total underwriting discounts and commissions received by
the Underwriters, bear to the total price to the public of the Shares, in each
case as set forth in the table on the cover page of the Prospectus. The relative
fault of the Company on the one hand and the Underwriters on the other hand
shall be determined by reference to, among other things, whether the untrue or
alleged untrue statement of a material fact or the omission or alleged omission
to state a material fact relates to information supplied by the Company or the
Underwriters and the parties' relative intent, knowledge, access to information
and opportunity to correct or prevent such statement or omission.

         The Company and the Underwriters agree that it would not be just and
equitable if contribution pursuant to this Section 7(d) were determined by pro
rata allocation (even if the Underwriters were treated as one entity for such
purpose) or by any other method of allocation which does not take account of the
equitable considerations referred to in the immediately preceding paragraph. The
amount paid or payable by an indemnified party as a result of the losses,
claims, damages, liabilities or judgments referred to in the immediately
preceding paragraph shall be deemed to include, subject to the limitations set
forth above, any legal or other expenses incurred by such indemnified party in
connection with investigating or defending any action or claim. Notwithstanding
the provisions of this Section 7, no Underwriter shall be required to contribute
any amount in excess of the amount by which the total price at which the Shares
underwritten by it and distributed to the public were offered to the public
exceeds



                                       17


<PAGE>



the amount of any damages which such Underwriter has otherwise been required to
pay by reason of such untrue or alleged untrue statement or omission or alleged
omission. No person guilty of fraudulent misrepresentation (within the meaning
of Section 11(f) of the Act) shall be entitled to contribution from any person
who was not guilty of such fraudulent misrepresentation. The Underwriters'
obligations to contribute pursuant to this Section 7(d) are several in
proportion to the respective number of Shares purchased by each of the
Underwriters hereunder and not joint.

                  (e) Any losses, claims, damages, liabilities or expenses for
which an indemnified party is entitled to indemnification or contribution under
this Section 7 shall be paid by the indemnifying party to the indemnified party
as such losses, claims, damages, liabilities or expenses are incurred. The
indemnity and contribution agreements contained in this Section 7 and the
representations and warranties of the Company set forth in this Agreement shall
remain operative and in full force and effect, regardless of (i) any
investigation made by or on behalf of the Underwriters or any persons
controlling the Underwriters, the Company, its trustees or officers, or any
person controlling the Company, (ii) acceptance of any Shares and payment
therefor hereunder, and (iii) any termination of this Agreement. Any successors
to the Underwriters or any persons controlling the Underwriters, or to the
Company, its trustees or officers, or any person controlling the Company, shall
be entitled to the benefits of the indemnity, contribution and reimbursement
agreements contained in this Section 7.

                  (f) The remedies provided for in this Section 7 are not
exclusive and shall not limit any rights or remedies which may otherwise be
available to any indemnified party at law or in equity.

         SECTION 8. Conditions of Underwriters' Obligations. The several
obligations of the Underwriters to purchase the Firm Shares under this Agreement
are subject to the satisfaction of each of the following conditions:

                  (a) All the representations and warranties of the Company
         contained in this Agreement shall be true and correct, in all material
         respects, on the Closing Date with the same force and effect as if made
         on and as of the Closing Date.

                  (b) The Registration Statement, including any Rule 462(b)
         Registration Statement, has become effective under the Act; the
         Prospectus shall have been filed with the Commission pursuant to Rule
         424(b) within the applicable time period prescribed for such filing by
         such Rule; if the Company is required to file a Rule 462(b)
         Registration Statement after the effectiveness of this Agreement, such
         Rule 462(b) Registration Statement shall have been filed by 10:00 A.M.,
         New York City time, on the day after the date of this Agreement; and no
         stop order suspending the effectiveness of the Registration Statement
         or the Prospectus shall have been issued and no proceedings for that
         purpose shall have been commenced or shall be pending before or
         contemplated by the Commission to the knowledge, after due inquiry, of
         the Company. No stop order suspending the effectiveness of the
         Registration Statement or the Prospectus shall have been issued and no
         proceedings for that purpose shall have been commenced or shall be
         pending before or threatened by the state securities authority of any
         jurisdiction to the knowledge, after due inquiry, of the Company.

                  (c) (i) Since the date of the latest balance sheet, there
         shall not have been any Material Adverse Effect, and (ii) other than as
         set forth in the Prospectus, no proceedings shall be pending or, to the
         knowledge of the Company, after due inquiry, threatened against the
         Company or the Subsidiaries or any of their property before or by any
         federal, state or other commission, board or administrative agency,
         which would reasonably be expected to result in a Material Adverse
         Effect. You shall have received on the Closing Date a certificate dated
         the



                                       18


<PAGE>



         Closing Date, signed by Clay W. Hamlin, III and Thomas D. Cassel,
         solely in their capacities as the Chief Executive Officer and Vice
         President, Finance and Treasurer of the Company and not individually,
         confirming the matters set forth in Sections 6(v), 8(a) and 8(b) and
         that the Company has complied with all of the agreements and satisfied
         all of the conditions herein contained and required to be complied with
         or satisfied by the Company on or prior to the Closing Date.

                  (d) You shall have received on the Closing Date an opinion
         (satisfactory to you and counsel for the Underwriters), dated the
         Closing Date, of Cahill Gordon & Reindel, counsel for the Company, to
         the effect that:

                           (i) Each of the Company and the Subsidiaries
                  identified on Schedule II hereto has been duly formed, is
                  validly existing as a corporation, limited partnership or
                  other legal entity, as the case may be, in good standing under
                  the laws of its jurisdiction of formation and has, the
                  requisite trust or partnership power and authority to carry on
                  its business substantially as described in the Registration 
                  Statement or the Prospectus and the transactions contemplated 
                  hereby to be performed by it and to own, lease and operate its
                  properties and other assets owned, leased or operated by it;


                           (ii) Each of the Company and the Subsidiaries
                  identified on Schedule II hereto is duly qualified, 
                  registered and is in good standing as a foreign corporation, 
                  limited partnership or other legal entity, as the case may 
                  be, authorized to do business in each jurisdiction 
                  identified in Schedule II hereto, except where the failure 
                  to be so qualified would not have a Material Adverse Effect;

                           (iii) All the outstanding shares of beneficial 
                  interest of the Company have been duly authorized and validly 
                  issued and are fully paid, non-assessable and not subject to 
                  any preemptive or similar rights;

                           (iv) The Shares have been duly authorized and, when
                  issued and delivered to the Underwriters against payment
                  therefor as provided by this Agreement, will be validly
                  issued, fully paid and non-assessable, and the issuance of
                  such Shares will not be subject to any preemptive or similar
                  rights;

                           (v) Except as otherwise provided for in the
                  Prospectus, all of the outstanding shares of capital stock and
                  units of limited partnership, as the case may be, of each of 
                  the Subsidiaries identified on Schedule II hereto have been 
                  duly authorized and validly issued and, in the case of FCO 
                  Holdings, Inc. ("FCO"), are fully paid and non-assessable, and
                  based solely upon an examination of the minute books or 
                  partnership agreement of such Subsidiaries and the 
                  certificates representing such shares of capital stock, are
                  owned of record by the Company or FCO (except in connection 
                  with __% of the outstanding Units or Units to be issued in 
                  exchange for the Retained Interests);

                           (vi) This Agreement has been duly authorized,
                  executed and delivered by the Company and the Operating
                  Partnership and, assuming due authorization, execution and
                  delivery by any other party thereto, is valid and legally
                  binding;

                           (vii) The authorized shares of beneficial interest 
                  of the Company conform as to legal matters in all material 
                  respects to the description thereof contained in the 
                  Prospectus;



                                       19


<PAGE>




                           (viii) The Registration Statement, as of the date
                  hereof and at the time the it became effective and the
                  Prospectus, as of its date or when any amendment or supplement
                  to the Prospectus is filed with the Commission (in each case,
                  other than the financial statements and supporting schedule
                  and other financial and statistical data included therein, as
                  to which no opinion need be rendered), complied as to form in
                  all material respects with the requirements of the Act;

                           (ix) The statements under the captions "Management--
                  The Plans," "Structure and Formation of the Company--The 
                  Property Financing," "Certain Provisions of Maryland Law, 
                  the Declaration of Trust and the Bylaws," "Federal Income 
                  Tax Considerations" and "Description of Common Shares," 
                  insofar as such statements constitute statements of law, 
                  description of statutes, rules or regulations, a summary of 
                  the legal matters, documents or proceedings referred to 
                  therein, have been reviewed by such counsel and are correct 
                  in all material respects and fairly present the information 
                  called for with respect to such legal matters, documents and 
                  proceedings;

                           (x) To the knowledge of such counsel, neither the
                  Company nor any of the Subsidiaries listed on Schedule II
                  hereto is in violation of its respective charter, declaration
                  of trust, by-laws, partnership agreement or other
                  organizational document, as the case may be, and, to such
                  counsel's knowledge, neither the Company nor any of such
                  Subsidiaries is in default in the performance or observance of
                  any obligation, agreement, covenant or condition contained in
                  any document (as in effect on the date of such opinion) listed
                  as an exhibit to the Registration Statement, the Company's
                  Annual Report on Form 10-K, as amended, if applicable, and the
                  Company's most recent Quarterly Report on Form 10-Q, as
                  amended, if applicable, to which the Company or any of such
                  Subsidiaries is a party or by which the Company or any of such
                  Subsidiaries or their respective property is bound (it being
                  understood that (i) such counsel need express no opinion with
                  respect to matters relating to any contract, indenture,
                  mortgage, loan agreement (except for the Property Financing),
                  note, lease, or other instrument or agreement relating to the
                  acquisition, transfer, operation, maintenance or management of
                  any property or assets of the Company or any of such
                  Subsidiaries and (ii) such counsel may assume compliance with
                  the financial covenants contained in any such document, except
                  in each case for violations or defaults which in the aggregate
                  are not reasonably expected to have a Material Adverse Effect;

                           (xi) To the knowledge of such counsel, the execution,
                  delivery and performance of this Agreement by the Company and
                  the Operating Partnership, and the consummation of the
                  transactions contemplated hereby will not (A) require any
                  consent, approval, authorization or other order of, any court
                  or governmental body or agency (except such as may be required
                  under the Act or securities, Blue Sky or real estate
                  syndication laws of the various states in connection with the
                  purchase and distribution of the Shares by the Underwriters),
                  (B) conflict with or constitute a breach of any of the terms
                  or provisions of, or a default under, (x) the declaration of 
                  trust, charter, by-laws, partnership agreement or other 
                  organizational document of the Company or the Subsidiaries
                  identified on Schedule II hereto, (y) any document (as in
                  effect on the date of such opinion) listed as an exhibit to
                  the Registration Statement, the Company's Annual Report on
                  Form 10-K, as amended, if applicable, and the Company's most
                  recent Quarterly Report on Form 10-Q, as amended, if
                  applicable, to which the Company or any of the Subsidiaries
                  identified on Schedule II hereto is a party or by which the



                                       20


<PAGE>



                  Company or any of such Subsidiaries or their respective
                  property is bound (it being understood that (i) such counsel
                  need express no opinion with respect to matters relating to
                  any contract, indenture, mortgage, loan agreement (except for
                  the Property Financing), note, lease, or other instrument or
                  agreement relating to the acquisition, transfer, operation,
                  maintenance or management of any property or assets of the
                  Company or any of the Subsidiaries and (ii) such counsel may
                  assume compliance with the financial covenants contained in
                  any such document), (C) violate or conflict with any
                  applicable law, rule or administrative regulation of the
                  United States or the State of Delaware, or (D) any order or
                  administrative or court decree of which such counsel is aware,
                  except in each case for conflicts, breaches, violations or
                  defaults that in the aggregate would not have a Material
                  Adverse Effect;

                           (xii) To such counsel's knowledge, there are no legal
                  or governmental proceedings pending or threatened that are
                  required to be described in the Registration Statement or the
                  Prospectus and are not so described and the descriptions
                  thereof are accurate in all material respects or any statutes,
                  regulations, contracts or other documents that are required to
                  be described in the Registration Statement or the Prospectus
                  or to be filed as exhibits thereto that are not so described
                  or filed as required and the descriptions thereof are accurate
                  in all material respects; provided, however, such counsel
                  shall not be required to express any opinion with respect to
                  the letters of intent or purchase agreement described in
                  "Summary-Business Objectives and Growth Strategies-Potential
                  Acquisitions."

                           (xiii) To the knowledge of such counsel, no material
                  authorization, approval, consent or order of any court or
                  governmental authority or agency is required in connection
                  with the offering, issuance or sale of the Shares hereunder at
                  or prior to the Closing Date except as may be required under
                  the Act or state securities or real estate syndications laws
                  or by-laws and rules of the NASD, or the listing requirements
                  of the NYSE or such as have been received prior to the date of
                  the opinion or except where the failure to have any such
                  authorization or to make any such filing or notice would not,
                  singly or in the aggregate, have a Material Adverse Effect;

                           (xiv) The Company and the Subsidiaries are not and,
                  after giving effect to the offering and sale of the Shares and
                  the application of the proceeds thereof as described in the
                  Prospectus, will not be required to be registered as an
                  "investment company" under the Investment Company Act of 1940,
                  as amended;

                           (xv) Except as otherwise provided for in the
                  Prospectus, or pursuant to agreements described in the
                  Prospectus under the caption "Summary Business Objectives and
                  Growth Strategies Potential Acquisitions" to the best of such
                  counsel's knowledge, there are no contracts, or agreements or
                  between the Company and any person granting such person the
                  right to require the Company to file a registration statement
                  under the Act with respect to any securities of the Company or
                  to require the Company to include such securities with the
                  Shares registered pursuant to the Registration Statement.

                                    At the Underwriters' request, Cahill Gordon
                  & Reindel shall also confirm to the Underwriters that it has
                  been informed by the Staff of the Commission that the
                  Registration Statement is effective under the Act and, to the
                  knowledge of such counsel,



                                       21


<PAGE>



                  no stop order suspending the effectiveness of the Registration
                  Statement has been issued under the Act or proceedings
                  therefor initiated or threatened by the Commission;

                                    In addition, Cahill Gordon & Reindel shall
                  confirm that the opinion filed as Exhibit 8.1 to the
                  Registration Statement is true and correct as of the date
                  thereof and permit the Underwriters to rely on such opinion as
                  if it were addressed to the Underwriters.

                                    Further, Cahill Gordon & Reindel shall state
                  that they have participated in conferences with officers and
                  other representatives of the Company and the Subsidiaries,
                  representatives of the independent public accountants for the
                  Company and representatives of the Underwriters at which the
                  contents of the Registration Statement and the Prospectus and
                  related matters were discussed. On the basis thereof (relying
                  as to materiality to the extent it deems appropriate upon the
                  opinions of officers and other representatives of the
                  Company), but without independent verification by such counsel
                  of, and without passing upon or assuming any responsibility
                  for, the accuracy, completeness or fairness of the statements
                  contained in the Registration Statement or the Prospectus or
                  any amendments or supplements thereto, no facts have come to
                  the attention of such counsel that lead them to believe that
                  (i) the Registration Statement, at the time such Registration
                  Statement became effective, contained any untrue statement of
                  a material fact or omitted to state any material fact required
                  to be stated therein or necessary in order to make the
                  statements therein not misleading or (ii) the Prospectus, as
                  of its date or at the Closing Date contained or contains any
                  untrue statement of a material fact or omitted or omits to
                  state a material fact necessary to make the statements
                  therein, in the light of the circumstances under which they
                  were made, not misleading (it being understood that such
                  counsel need express no opinion with respect to the financial
                  statements, schedules and other financial and statistical data
                  included in the Registration Statement or the Prospectus).

                                    In giving its opinion, such counsel shall
                  expressly limit their opinion to matters of Federal and New
                  York law and the Revised Uniform Limited Partnership Act and
                  the General Corporation Law of the State of Delaware and may
                  rely without independent verification (A) as to all matters of
                  fact, upon certificates and written statements of officers,
                  trustees, directors, partners and employees of and accountants
                  for the Company and the Subsidiaries, (B) as to matters of
                  Maryland law, on the opinion of Ballard Spahr Andrews &
                  Ingersoll, LLP, Baltimore, Maryland, which opinion shall be in
                  form and substance reasonably satisfactory to counsel for the
                  Underwriters, and (C) as to the good standing and
                  qualification of the Company and the Subsidiaries, to do
                  business in any state or jurisdiction, upon certificates of
                  appropriate government officials or opinions of counsel in
                  such jurisdictions. Counsel need express no opinion (i) as to
                  the enforceability of forum selection clauses in the federal
                  courts or (ii) with respect to the requirements of, or
                  compliance with, any state securities or "Blue Sky" or real
                  estate syndication laws;

                  (e) You shall have received on the Closing Date an opinion or
         opinions (satisfactory to you and your counsel), dated the Closing Date
         of Ballard Spahr Andrews & Ingersoll, LLP, special Maryland counsel for
         the Company, to the effect that:

                           (i) The Company is a real estate investment trust
                  duly formed and existing under and by virtue of the laws of 
                  the State of Maryland in good standing with the State 
                  Department of Assessments and Taxation of Maryland;



                                       22


<PAGE>




                           (ii) The Company has trust power and authority to
                  own, lease and operate its properties and other assets and to
                  conduct the business in which it is engaged or proposes to
                  engage, in each case, substantially as described under the 
                  caption "The Company" in the Prospectus, and the Company has 
                  the trust power and authority to enter into and perform its 
                  obligations under this Agreement;

                           (iii) The Company's authorized capitalization
                  consists of 50,000,000 shares of beneficial interest. 
                  All of the issued and outstanding shares of capital stock of 
                  the Company have been duly authorized and are validly issued, 
                  fully paid and non-assessable;

                           (iv) Each of the Shares has been duly authorized for
                  issuance and sale to the Underwriters pursuant to this
                  Agreement and, when validly issued and delivered pursuant to
                  this Agreement against payment of the Purchase Price in 
                  accordance with the resolutions of the Board of Trustees of 
                  the Company authorizing their issuance, will be duly 
                  authorized, validly issued, fully paid and non-assessable. 
                  The terms of the Shares conform in all material respects to
                  all statements and descriptions related under the caption 
                  "Description of Common Shares" contained in the Registration 
                  Statement and Prospectus. The form of stock certificates 
                  evidencing the Shares is in due and proper form in all 
                  material respects and complies in all material respects with 
                  all applicable legal requirements. The issuance of the Shares 
                  is not subject to any preemptive or other similar rights 
                  arising under the Maryland General Corporation Law, the 
                  Company's declaration of trust or by-laws, as amended to date,
                  or any agreement of which such counsel is aware;

                           (v) This Agreement was duly and validly authorized
                  and executed by the Company;

                           (vi) The execution and delivery of this Agreement and
                  the performance of the obligations set forth herein by the
                  Company will not require, as far as is known to such counsel,
                  any consent, approval, Authorization or other order of any
                  Maryland court, regulatory body, administrative agency or
                  other governmental body (except as such may be required under
                  the Act or other securities laws) and did not and do not
                  conflict with or constitute a breach or violation of or
                  default under: (1) the declaration of trust or by-laws, as the
                  case may be, of the Company; (2) any applicable Maryland law,
                  rule or administrative regulation or any order or
                  administrative or court decree of which such counsel is aware,
                  except in each case for conflicts, breaches, violations or
                  defaults that in the aggregate would not have a Material
                  Adverse Effect; and

                           (vii) The information in the Prospectus under "Risk
                  Factors - Potential Effects of Ownership Limitation," 
                  


                                       23


<PAGE>



                  "Certain Provisions of Maryland Law, the Declaration of Trust
                  and the Bylaws," and "Description of Common Shares" to the 
                  extent that it constitutes statements of law, descriptions of 
                  statutes, rules or regulations, summaries of documents or 
                  legal conclusions, has been reviewed by such counsel and, as 
                  to Maryland law, correct in all material respects and presents
                  fairly the information required to be disclosed therein.

                  (f) You shall have received on the Closing Date an opinion,
         dated the Closing Date, of Rogers & Wells LLP, counsel for the
         Underwriters, as to the matters referred to in clauses (iv) (with
         respect to the first and last sentences only) of Section 8(f) and
         clauses (vii), (ix) and (x) (with respect to "Description of Common
         Shares" only) of Section 8(e) and in addition, Rogers & Wells LLP shall
         make statements similar to those contained in the first and third
         paragraphs following Section 8(e)(xvii) hereto and shall be entitled to
         rely on those persons described in the third paragraph following
         Section 8(e)(xvii) described therein.

                  (g) You shall have received, on each of the date hereof and
         the Closing Date, a letter dated the date hereof or the Closing Date,
         as the case may be, in form and substance satisfactory to you (and your
         counsel), from Coopers & Lybrand L.L.P., independent public
         accountants, confirming that they are independent public accountants
         with respect to the Company and the Subsidiaries as required by the Act
         and with respect to the financial and other statistical and numerical
         information contained in the Registration Statement and containing the
         information and statements of the type ordinarily included in
         accountants' "comfort letters" to Underwriters with respect to the
         financial statements and certain financial information contained in the
         Registration Statement and the Prospectus.

                  At the Closing Date, Coopers & Lybrand L.L.P. shall have
         furnished to the Underwriters a letter, dated the date of its delivery,
         which shall confirm, on the basis of a review in accordance with the
         procedures set forth in the letter from it, that nothing has come to
         its attention during the period from the date of the letter referred to
         in the prior sentence to a date (specified in the letter) not more than
         five days prior to the Closing Date which would require any change in
         its letter dated the date hereof if it were required to be dated and
         delivered at the Closing Date as the case may be.

                  (h) The Shares have been approved for listing on the NYSE upon
         official notice of issuance.

                  (i) The Company and the Subsidiaries shall not have failed on
         or prior to the Closing Date to perform or comply with any of the
         agreements herein contained and required to be performed or complied
         with by the Company on or prior to the Closing Date.

                  (j) At the Closing Date, counsel for the Underwriters shall
         have been furnished with such documents and opinions as they may
         reasonably require for the purpose of enabling them to pass upon the
         issuance and sale of the Shares, as herein contemplated and related
         proceedings, or in order to evidence the accuracy of any of the
         representations or warranties, or the fulfillment of any of the
         conditions, herein contained; and all proceedings taken by the Company
         in connection with the issuance and sale of the Shares as herein
         contemplated shall be reasonably satisfactory in form and substance to
         the Underwriters and counsel for the Underwriters.



                                       24


<PAGE>



                  (k) At the Closing Date, the Underwriters shall have received
         a letter agreement from certain of the trustees and executive officers
         of the Company, as listed on Schedule III hereto, substantially in the
         form attached hereto as Exhibit A.

         The several obligations of the Underwriters to purchase any Additional
Shares hereunder are subject to the delivery to you on the applicable Option
Closing Date of such documents as you may reasonably request with respect to the
good standing of the Company, the due authorization and issuance of such
Additional Shares and other matters related to the issuance of such Additional
Shares, including, without limitation:

                  (i) A certificate, dated such Option Closing Date, of the
         President or a Vice President and the chief financial or chief
         accounting officer of the Company confirming that the certificates
         delivered at the Closing Date pursuant to Section 8 hereof remain true
         and correct in all material respects as of such Option Closing Date.

                  (ii) An opinion of Cahill Gordon & Reindel in form and
         substance satisfactory to you and your counsel, dated such Option
         Closing Date, relating to the Additional Shares to be purchased on such
         Option Closing Date and otherwise to the same effect as the opinion
         required by Section 8(e) hereof.

                  (iii) An opinion of Rogers & Wells LLP, counsel for the
         Underwriters, dated such Option Closing Date, relating to the
         Additional Shares to be purchased on such Option Closing Date and
         otherwise to the same effect as the opinion required by 8(g) hereof.

                  (iv) A letter from Coopers & Lybrand, in form and substance
         satisfactory to you and your counsel and dated such Option Closing
         Date, substantially the same in form and substance as the letter
         furnished to the Underwriters pursuant to Section 8(h) hereof, dated
         not more than five days prior to such Option Closing Date.

         SECTION 9. Effectiveness of Agreement and Termination. This Agreement
shall become effective upon the execution and delivery of this Agreement by the
parties hereto.

         This Agreement may be terminated at any time on or prior to the Closing
Date by you by written notice to the Company if any of the following has
occurred: (i) since the respective dates as of which information is given in the
Registration Statement and the Prospectus, there has been a Material Adverse
Effect, (ii) any outbreak or escalation of hostilities or other national or
international calamity or crisis or change in economic conditions or in the
financial markets of the United States or elsewhere that, in your judgment, is
material and adverse and, in your judgment, makes it impracticable to market the
Shares on the terms and in the manner contemplated in the Prospectus, (iii) the
suspension or material limitation of trading in securities on the NYSE or
limitation on prices for securities on the NYSE, (iv) the suspension of trading
of any securities of the Company on any exchange or in the over the counter
market, except in connection with the Company's delisting on NASDAQ, (v) the
enactment, publication, decree or other promulgation of any federal or state
statute, regulation, rule or order of any court or other governmental authority
which in your opinion materially and adversely affects, or will materially and
adversely affect, the business, prospects, financial condition or results of
operations of the Company and the Subsidiaries, taken as a whole, (v) the
declaration of a banking moratorium by either federal or New York State
authorities or (vi) the taking of any action by any federal, state or local
government or agency in respect of its monetary or fiscal affairs which in your
opinion has a material adverse effect on the financial markets in the United
States.



                                       25


<PAGE>



         If on the Closing Date or on an Option Closing Date, as the case may
be, any one or more of the Underwriters shall fail or refuse to purchase the
Firm Shares or Additional Shares, as the case may be, which it has or they have
agreed to purchase hereunder on such date and the aggregate number of Firm
Shares or Additional Shares, as the case may be, which such defaulting
Underwriter or Underwriters agreed but failed or refused to purchase is not more
than one-tenth of the total number of Firm Shares or Additional Shares, as the
case may be, to be purchased on such date by all Underwriters, each
non-defaulting Underwriter shall be obligated severally, in the proportion which
the number of Firm Shares set forth opposite its name in Schedule I bears to the
total number of Firm Shares which all the non-defaulting Underwriters have
agreed to purchase, or in such other proportion as you may specify, to purchase
the Firm Shares or Additional Shares, as the case may be, which such defaulting
Underwriter or Underwriters agreed but failed or refused to purchase on such
date; provided that in no event shall the number of Firm Shares or Additional
Shares, as the case may be, which any Underwriter has agreed to purchase
pursuant to Section 2 hereof be increased pursuant to this Section 9 by an
amount in the excess of one-ninth of such number of Firm Shares or Additional
Shares, as the case may be, without the written consent of such Underwriter. If
on the Closing Date any Underwriter or Underwriters shall fail or refuse to
purchase Firm Shares and the aggregate number of Firm Shares with respect to
which such default occurs is more than one-tenth of the aggregate number of Firm
Shares to be purchased by all Underwriters and arrangements satisfactory to you
and the Company for purchase of such Firm Shares are not made within 48 hours
after such default, this Agreement will terminate without liability on the part
of any non-defaulting Underwriter and the Company. In any such case which does
not result in termination of this Agreement, either you or the Company shall
have the right to postpone the Closing Date, but if no event for longer than
seven days, in order that the required changes, if any, in the Registration
Statement and the Prospectus or any other documents or arrangements may be
effected. If, on an Option Closing Date, any Underwriter or Underwriters shall
fail or refuse to purchase Additional Shares and the aggregate number of
Additional Shares with respect to which such default occurs is more than
one-tenth of the aggregate number of Additional Shares to be purchased on such
date, the non-defaulting Underwriters shall have the option to (i) terminate
their obligation hereunder to purchase such Additional Shares or (ii) purchase
not less than the number of Additional Shares that such non-defaulting
Underwriters would have been obligated to purchase on such date in the absence
of such default. Any action taken under this paragraph shall not relieve any
defaulting Underwriter from liability in respect of any default of any such
Underwriter under this Agreement.

         Section 10. Miscellaneous. Notices given pursuant to any provision of
this Agreement shall be addressed as follows: (i) if to the Company, to
Corporate Office Properties Trust, One Logan Square, Suite 1105, Philadelphia,
Pennsylvania 19103, Attention: Clay W. Hamlin, III, with a copy to Cahill Gordon
& Reindel, 80 Pine Street, New York, New York 10005, Attention: Gerald S.
Tanenbaum, Esq. and (ii) if to any Underwriter or to you, to you c/o Donaldson,
Lufkin & Jenrette Securities Corporation, 277 Park Avenue, New York, New York
10172, Attention: Syndicate Department, with a copy to Rogers & Wells LLP, 200
Park Avenue, New York, New York 10166, Attention: Robert E. King, Jr., or in any
case to such other address as the person to be notified may have requested in
writing.

         The respective indemnities, contribution agreements, representations,
warranties and other statements of the Company and the several Underwriters set
forth in or made pursuant to this Agreement shall remain operative and in full
force and effect, and will survive delivery of and payment for the Shares,
regardless of (i) any investigation, or statement as to the results thereof,
made by or on behalf of any Underwriter, the officers or directors of any
Underwriter, any person controlling any Underwriter, the Company, the officers
or trustees of the Company or any person controlling the Company and (ii)
acceptance of the Shares and payment for them hereunder.



                                       26


<PAGE>



         In the event of termination of this Agreement, the provisions of 5(k)
and 7 shall remain operative and in full force and effect.

         If this Agreement shall be terminated by the Underwriters because of
any failure or refusal on the part of the Company and the Operating Partnership
to comply with the terms or to fulfill any of the conditions of this Agreement
or in connection with any event of termination described in the first paragraph
of Section 9, the Company and the Operating Partnership agree to reimburse the
Underwriters for all out-of-pocket expenses (including the fees and
disbursements of counsel) reasonably incurred by them.

         Except as otherwise provided, this Agreement has been and is made
solely for the benefit of and shall be binding upon the Company, the
Underwriters, the Underwriters' directors and officers, any controlling persons
referred to herein, the Company's trustees and the Company's officers who sign
the Registration Statement and their respective successors and assigns, all as
and to the extent provided in this Agreement, and no other person shall acquire
or have any right under or by virtue of this Agreement. The term "successors and
assigns" shall not include a purchaser of any of the Shares from any of the
several Underwriters merely because of such purchase.

         This Agreement shall be governed and construed in accordance with the
laws of the State of New York.

         This Agreement may be signed in various counterparts which together
shall constitute one and the same instrument.



                                       27


<PAGE>



         Please confirm that the foregoing correctly sets forth the agreement
between the Company and the several Underwriters.

                                         Very truly yours,

                                         CORPORATE OFFICE PROPERTIES TRUST

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

                                         CORPORATE OFFICE PROPERTIES, L.P.

                                         By:  CORPORATE OFFICE PROPERTIES TRUST,
                                              its sole general partner

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

DONALDSON, LUFKIN & JENRETTE
  SECURITIES CORPORATION
BT ALEX. BROWN INCORPORATED
PRUDENTIAL SECURITIES INCORPORATED

Acting severally on behalf of
  themselves and the several
  Underwriters named in
  Schedule I hereto

By:      DONALDSON, LUFKIN & JENRETTE
           SECURITIES CORPORATION

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



                                       28


<PAGE>



                                   SCHEDULE I

<TABLE>
<CAPTION>

Underwriters                                           Number of Firm Shares
                                                          to be Purchased
<S>                                                    <C>
Donaldson, Lufkin & Jenrette
         Securities Corporation.................
BT Alex. Brown Incorporated.....................
Prudential Securities Incorporated..............
                                                             ---------
                                           Total             7,500,000
                                                             ---------
                                                             ---------
</TABLE>


                                  Schedule I-1


<PAGE>



                                   SCHEDULE II

           JURISDICTIONS OF FOREIGN QUALIFICATION OF THE SUBSIDIARIES

ENTITY                                          JURISDICTION

*Corporate Office Properties, L.P.              Pennsylvania and New Jersey

*Corporate Office Properties Holdings, Inc.     Pennsylvania and New Jersey



- --------------------------
*Denotes jurisdictions on which counsel is opining.



                                  Schedule II-1


<PAGE>



                                  SCHEDULE III

        LIST OF TRUSTEES AND OFFICERS SUBJECT TO LOCKUP PROVISIONS

        Jay H. Shidler
        Clay W. Hamlin, III
        Vernon R. Beck
        John Parsinen
        Allen C. Gehrke
        Kenneth S. Sweet, Jr.
        Kenneth D. Wethe
        Anthony P. Bernheim



                                 Schedule III-1


<PAGE>



                                    EXHIBIT A

DONALDSON, LUFKIN & JENRETTE SECURITIES CORPORATION
277 Park Avenue
New York, New York 10172

Ladies and Gentlemen:

                  Reference is made to the Underwriting Agreement dated April
__, 1998 (the "Underwriting Agreement") among Corporate Office Properties Trust
(the "Company"), Corporate Office Properties, L.P. (the "Operating Partnership")
and Donaldson, Lufkin & Jenrette Securities Corporation (the "Underwriter"), as
representative of the several Underwriters, relating to the public offering of
7,500,000 common shares of beneficial interest, par value $.01 per share
("Common Shares"), of the Company. This letter is delivered by the undersigned
to the Underwriters pursuant to Section 8(l) of the Underwriting Agreement.
Capitalized terms used herein shall, unless otherwise defined herein, have the
meaning set forth in the Underwriting Agreement.

                  The undersigned hereby agrees that the undersigned shall not,
without the prior written consent of the Underwriter, offer, pledge, sell,
contract to sell, sell any option or contract to purchase, purchase any option
or contract to sell, grant any option, right or warrant to purchase, or
otherwise transfer or dispose of, directly or indirectly, (or enter into any
transaction or device which is designed to, or could be expected to result in
the disposition by any person at any time in the future of), any Common Shares,
Units (including, without limitation, Common Shares or Units which may be deemed
to be beneficially owned in accordance with Rule 13d-3 under the Securities
Exchange Act of 1934, as amended, and Common Shares or Units which may be
received upon exercise of stock options or warrants) or any securities
convertible into or exercisable, exchangeable or redeemable for Common Shares or
Units, or enter into any swap or other arrangement or in any other manner
transfer all or a portion of the economic consequences associated with the
ownership of Common Shares or Units (each of the foregoing actions, a
"Transfer"), prior to the expiration of 180 days from the date of the
Prospectus.

                  Notwithstanding the foregoing, no such consent shall be
required in connection with (i) the delivery to the Company, in connection with
the exercise of options or the grant under the Company's Option Plan or
Incentive Plan, of Common Shares in satisfaction of the exercise price of such
options or applicable withholding requirements, (ii) the redemption of Units for
Common Shares, (iii) grants of a bona fide security interest in, or a bona fide
pledge of, Common Shares and/or Units to a recognized financial institution and
transactions contemplated by such grants or pledges whether made before or after
the date of the Underwriting Agreement, (iv) any Transfer to entities controlled
by, or under common control with, the undersigned, (v) any Transfer to members
of the immediate family of the undersigned (or to an entity for their benefit)
and (vi) convert Preferred Units into Common Units; provided that, in the case
of a Transfer of the type described in clause (v), prior to making any such
Transfer, the undersigned shall have delivered a written instrument to the
Underwriter in which the transferee agrees to be bound by the restrictions
contained in this agreement with respect to the subject of such Transfer.



                                   Exhibit A-1


<PAGE>


                  The obligation of the undersigned shall survive the death or
incapacity of the undersigned and shall be binding upon the heirs, personal
representatives, successors and assigns of the undersigned.

                                             Very truly yours,


                                              ---------------------------------
                                              Name:
                                              Date:
                                              Address:
                                                      --------------------------

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

                                                      --------------------------
Agreed:

DONALDSON, LUFKIN & JENRETTE
  SECURITIES CORPORATION

By:
   ------------------------------
    Authorized Signature



                                   Exhibit A-2


<PAGE>

                                                                     EXHIBIT 5.1

                          [Letterhead of Cahill Gordon & Reindel]


                                  April 9, 1998


Corporate Office Properties Trust
One Logan Square, Suite 1105
Philadelphia, Pennsylvania  19103

Ladies and Gentlemen:

                  We have acted as counsel for Corporate Office Properties Trust
(the "Trust") in connection with the Registration Statement on Form S-11 (the
"Registration Statement") filed by the Trust with the Securities and Exchange
Commission (the "Commission") for registration under the Securities Act of 1933,
as amended (the "Securities Act"), of up to 8,625,000 common shares of
beneficial interest, par value $0.01 per share (the "Common Shares").
Capitalized terms used and not otherwise defined herein shall have the meanings
ascribed to such terms in the Registration Statement.

                  In connection therewith, we have examined, among other things,
originals or copies, certified or otherwise identified to our satisfaction, of
the Declaration of Trust and Bylaws of the Trust, resolutions of the Board of
Trustees of the Trust with respect to the filing of the Registration Statement
and such other documents as we have deemed necessary or appropriate for the
purpose of rendering this opinion.

                  In our examination of documents, instruments and other papers,
we have assumed the genuineness of all signatures on original and certified
documents and the conformity to original and certified documents of all copies
submitted to us as conformed, photostatic or


<PAGE>

other copies. As to matters of fact, we have relied upon representations of
officers of the Trust.

                  Based upon the foregoing examination, information supplied and
assumptions, it is our opinion that the Common Shares have been duly authorized
by all necessary action of the Trust and when the Common Shares have been
issued, delivered and paid for as described in the Registration Statement, such
Common Shares will be validly issued, fully paid and non-assessable.

                  We are attorneys admitted to practice in the State of New
York. We express no opinion concerning the laws of any jurisdiction other than
the laws of the United States of America and the laws of the State of New York.
With respect to matters of Maryland law, we have relied, without independent
investigation, upon the opinion of Ballard Spahr Andrews & Ingersoll, LLP, a
copy of which is attached hereto.

                  We hereby consent to the reference to our firm in the
Registration Statement under the caption "Legal Matters" and to the inclusion of
this opinion as an exhibit to the Registration Statement. Our consent to such
reference does not constitute a consent under Section 7 of the Securities Act as
in consenting to such reference we have not certified any part of the
Registration Statement and do not otherwise come within the categories of
persons whose consent is required under Section 7 or under the rules and
regulations of the Commission thereunder.

                                                 Very truly yours,

                                             /s/ Cahill Gordon & Reindel
<PAGE>

           [Letterhead of Ballard Spahr Andrews & Ingersoll, LLP]


                                    April 9, 1998

Corporate Office Properties Trust
One Logan Square, Suite 1105
Philadelphia, Pennsylvania 19103

                  Re:  Corporate Office Properties Trust
                       Registration Statement on Form S-11
                       (Registration No. 333-47465)
                       ------------------------------------

Ladies and Gentlemen:

          We have served as Maryland counsel to Corporate Office Properties 
Trust, a Maryland real estate investment trust (the "Company"), in connection 
with certain matters of Maryland law arising out of the registration of up to 
8,625,000 common shares (the "Shares") of beneficial interest, $.01 par value 
per share, of the Company ("Common Shares") (including an option to purchase 
up to an additional 1,125,000 Shares), as described in the above-referenced 
Registration Statement, under the Securities Act of 1933, as amended (the 
"1933 Act"). Capitalized terms used but not defined herein shall have the 
meanings given to them in the Registration Statement.

          In connection with our representation of the Company, and as a 
basis for the opinion hereinafter set forth, we have examined originals, or 
copies certified or otherwise identified to our satisfaction, of the 
following documents (hereinafter collectively referred to as the "Documents"):

          1.  The Registration Statement in the form in which it was 
transmitted to the Securities and Exchange Commission (the "Commission"), 
including the related form of prospectus in the form in which it was 
transmitted to the Commission under the 1933 Act;

          2.  The Amended and Restated Declaration of Trust of the Company, 
certified as of a recent date by the State Department of Assessments and 
Taxation of Maryland (the "SDAT");

          3.  The Bylaws of the Company, certified as of a recent date by an 
officer of the Company;

<PAGE>

Corporate Office Properties Trust
April    , 1998
Page 2

         4. Resolutions adopted by the Board of Trustees, or a duly 
authorized committee thereof, of the Company relating to the authorization, 
sale, issuance and registration of the Shares (the "Resolutions"), certified 
as of a recent date by an officer of the Company;

         5. A certificate of the SDAT, as of a recent date, as to the good 
standing of the Company;

         6. A certificate executed by an officer of the Company, dated the 
date hereof;

         7. A form of certificate evidencing a Common Share, certified as of 
a recent date by an officer of the Company; and

         8. Such other documents and matters as we have deemed necessary or 
appropriate to express the opinion set forth in this letter, subject to the 
assumptions, limitations and qualifications stated herein.

         In expressing the opinion set forth below, we have assumed, and so 
far as is known to us there are no facts inconsistent with, the following:

         1. Each of the parties (other than the Company) executing any of the 
Documents has duly and validly executed and delivered each of the Documents 
to which such party is a signatory, and such party's obligations set forth 
therein are legal, valid and binding and are enforceable in accordance with 
all stated terms.

         2. Each individual executing any of the Documents on behalf of a 
party (other than the Company) is duly authorized to do so.

         3. Each individual executing any of the Documents, whether on behalf 
of such individual or another person, is legally competent to do so.

         4. All Documents submitted to us as originals are authentic. The 
form and content of the Documents submitted to us as unexecuted drafts do not 
differ in any respect relevant to this opinion from the form and content of 
such Documents as executed and delivered. All Documents submitted to us as 
certified or photostatic copies conform to the original documents. All 
signatures on all such Documents are genuine. All public records reviewed or 
relied upon by us or on our behalf are true and complete. All statements and 
information contained


<PAGE>

Corporate Office Properties Trust
April __, 1998
Page 3


in the Documents are true and complete. There has been no oral or written 
modification or amendment to any of the Documents, and there has been no 
waiver of any provision of any of the Documents, by action or omission of the 
parties or otherwise.

     The phrase "known to us" is limited to the actual knowledge, without 
independent inquiry, of the lawyers at our firm who have performed legal 
services in connection with the issuance of this opinion.

     Based upon the foregoing, and subject to the assumptions, limitations 
and qualifications stated herein, it is our opinion that:

     1.  The Company is a real estate investment trust duly formed and 
existing under and by virtue of the laws of the State of Maryland and is in 
good standing with the SDAT.

     2.  The Shares have been duly authorized and, when and if issued in 
accordance with the Resolutions, will be duly and validly issued, fully paid 
and nonassessable.

     The foregoing opinion is limited to the substantive laws of the State of 
Maryland and we do not express any opinion herein concerning any other law. 
We express no opinion as to compliance with the securities (or "blue sky") 
laws of the State of Maryland.

     We assume no obligation to supplement this opinion if any applicable law 
changes after the date hereof or if we become aware of any fact that might 
change the opinion expressed herein after the date hereof.

     This opinion is being furnished to you for your submission to the 
Commission as an exhibit to the Registration Statement and, accordingly, may 
not be relied upon by, quoted in any manner to, or delivered to any other 
person or entity (other than Cahill Gordon & Reindel, counsel to the Company) 
without, in each instance, our prior written consent.



<PAGE>

Corporate Office Properties Trust
April __, 1998
Page 4


     We hereby consent to the filing of this opinion as an exhibit to the 
Registration Statement and to the use of the name of our firm in the section 
entitled "Legal Matters" in the Registration Statement. In giving this 
consent, we do not admit that we are within the category of persons whose 
consent is required by Section 7 of the 1933 Act.

                                       Very truly yours,

                                    Ballard Spahr Andrews & Ingersoll, LLP


<PAGE>

                     [Letterhead of Cahill Gordon & Reindel]



                                  April 8, 1998

                                                             

Corporate Office Properties Trust
One Logan Square, Suite 1105
Philadelphia, PA  19103

Ladies and Gentlemen:

                  We have acted as tax counsel to Corporate Office Properties
Trust, a Maryland real estate investment trust (the "Company"), in connection
with the Registration Statement on Form S-11 filed by the Company with the
Securities and Exchange Commission on March 6, 1998, as amended through the date
hereof (the "Registration Statement").1 We have been asked to provide our
opinion as to certain federal income tax matters arising under the Internal
Revenue Code of 1986, as amended (the "Code"), relating to the Company's
qualification for taxation as a real estate investment trust (a "REIT") for
federal income tax purposes.

- --------------------------
1        Capitalized terms used in this letter that are not otherwise defined
         herein have the meanings ascribed to them in the Registration
         Statement. References to the Company shall include Corporate Office
         Properties Trust, Inc., a Minnesota corporation (formerly known as
         Royale Investments, Inc.), for periods prior to the merger of that
         corporation into the Maryland real estate investment trust on March 16,
         1998.


<PAGE>

                  The opinions set forth in this letter are based on relevant
provisions of the Code, Treasury Regulations thereunder and interpretations of
the foregoing as expressed in court decisions and administrative determinations
as of the date hereof (or, where applicable, as in effect during earlier periods
in question). These provisions and interpretations are subject to changes that
might result in modifications of our opinions.

                  For purposes of rendering the opinions contained in this
letter, we have reviewed the Registration Statement and such other documents,
law and facts as we have deemed necessary. In our review, we have assumed the
genuineness of all signatures; the proper execution of all documents; the
authenticity of all documents submitted to us as originals; the conformity to
originals of all documents submitted to us as copies; and the authenticity of
the originals of any copies.

                  These opinions also are premised on certain written
representations made by the Company in a certificate dated the date hereof (the
"Certificate"), the assumptions identified herein and the assumptions and
representations described in the Registration Statement under the heading
"Federal Income Tax Considerations" (the "Tax Section"). For purposes of our
opinions, we have not made an independent investigation of the matters relating
to such assumptions or representations. We have relied on the representation in
the Certificate that the information contained in the Certificate and the
Registration Statement, or otherwise furnished to us, accurately describes all
material facts relevant to our opinions.

                  Based upon and subject to the foregoing, we are of the opinion
that, for federal income tax purposes, (a) the Company has properly elected and
otherwise qualified to be taxed as a REIT for the taxable years commencing on
and after January 1, 1992, and ending prior to January 1, 1998, and (b) the
proposed method of operation as described in the Registration Statement and as
represented by the Company will enable the Company to continue to satisfy the
requirements for such qualification for subsequent taxable years.

                  We express no opinion other than the opinions expressly set
forth herein. Our opinions are not binding on the Internal Revenue Service (the
"IRS") and the IRS may disagree with our opinions. Although we believe that our
opinions would be sustained if challenged, there can be no assurance that this
will be the case. Our opinions are based upon the law as it currently exists.
Consequently, future changes in the law may cause the federal income tax
treatment of the matters referred to herein and in the Tax Section to be
materially and adversely different from that

                                       2

<PAGE>

described above and in the Tax Section. In addition, any variation in the facts
from those set forth in the Registration Statement, the representations
contained in the Certificate or otherwise provided to us may affect the
conclusions stated in our opinions. Moreover, the Company's qualification and
taxation as a REIT depended and depend upon the Company's ability to meet, for
each taxable year, various tests imposed under the Code. These include, among
others, tests relating to asset composition, operating results, distribution
levels and diversity of stock ownership. We will not review (and have not
reviewed) the Company's compliance with these tests. Accordingly, no assurance
can be given that the actual results of the Company's operations for any taxable
year will satisfy (or has satisfied) the requirements for the Company to qualify
(or to have qualified) as a REIT.

                  We hereby consent to the reference to our firm in the
Registration Statement under the caption "Federal Income Tax Considerations" and
to the inclusion of this opinion as an exhibit to the Registration Statement.
Our consent to such reference does not constitute a consent under Section 7 of
the Securities Act of 1933, as amended, as in consenting to such reference we
have not certified any part of such Registration Statement and do not otherwise
come within the categories of persons whose consent is required under Section 7
or under the rules and regulations of the Securities and Exchange Commission
thereunder.

                                                         Very truly yours,

                                                    /s/ Cahill Gordon & Reindel
                                       3


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