LIBERTY PROPERTY TRUST
8-K, 1999-04-19
REAL ESTATE INVESTMENT TRUSTS
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20546

                                    FORM 8-K

                                 CURRENT REPORT


                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934



Date of Report (Date of earliest event reported): April 19, 1999
                                                 (April 15, 1999)


                             LIBERTY PROPERTY TRUST
                      LIBERTY PROPERTY LIMITED PARTNERSHIP
                    (Exact names of registrants as specified
                          in their respective charters)


         MARYLAND                    1-13130                     23-7768996
       PENNSYLVANIA                  1-13132                     23-2766549
(State or other jurisdiction       (Commission                (I.R.S. Employer
     of incorporation)              File Number)             Identification No.)


65 VALLEY STREAM PARKWAY, SUITE 100
MALVERN, PENNSYLVANIA                                              19355
(Address of principal executive offices)                         (Zip Code)


Registrants' telephone number, including area code: (610) 648-1700
<PAGE>   2
ITEM 5: OTHER EVENTS

      On April 15, 1999, Liberty Property Limited Partnership (the
"Partnership") priced a public offering (the "Offering") of $250,000,000
principal amount of its 7.75% Senior Notes due 2009. Lehman Brothers Inc., Banc
One Capital Markets, Inc., Donaldson, Lufkin & Jenrette Securities Corporation,
Goldman, Sachs & Co., J.P. Morgan Securities Inc., Salomon Smith Barney Inc. and
Warburg Dillon Read LLC (collectively, the "Underwriters") acted as underwriters
for the Offering. The Underwriting Agreement relating to the Offering is filed
as Exhibit 1.1 to this Report.


ITEM 7: FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS

(a)   Financial Statements of Businesses Acquired.

      None.

(b)   Pro Forma Financial Information.

      None.

(c)   Exhibits.


      1.1   Underwriting Agreement, dated April 15, 1999, by and among Liberty
            Property Trust (the "Trust"), the Partnership and the Underwriters.

      12.1  Statement Re: Computation of Ratio of Earnings to Combined Fixed
            Charges and Ratio of Earnings to Fixed Charges.
<PAGE>   3
                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, each
Registrant has duly caused this Report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                    LIBERTY PROPERTY TRUST



Dated: April 19, 1999               BY: /s/ George J. Alburger, Jr.
                                        -------------------------------
                                        NAME:  George J. Alburger, Jr.
                                        TITLE: Chief Financial Officer


                                    LIBERTY PROPERTY LIMITED PARTNERSHIP
                                    BY: LIBERTY PROPERTY TRUST, AS ITS
                                        SOLE GENERAL PARTNER


Dated: April 19, 1999               BY: /s/ George J. Alburger, Jr.
                                        -------------------------------
                                        NAME:  George J. Alburger, Jr.
                                        TITLE: Chief Financial Officer
<PAGE>   4
                                  EXHIBIT INDEX

1.1   Underwriting Agreement, dated April 15, 1999, by and among the Trust, the
      Partnership and the Underwriters.

12.1  Statement Re: Computation of Ratio of Earnings to Combined Fixed Charges
      and Ratio of Earnings to Fixed Charges.


<PAGE>   1
                                                                     Exhibit 1.1

                      LIBERTY PROPERTY LIMITED PARTNERSHIP

                      (a Pennsylvania Limited Partnership)

                    $250,000,000 7 3/4% SENIOR NOTES DUE 2009

                             UNDERWRITING AGREEMENT

                                                                  April 15, 1999

Lehman Brothers Inc.,
Banc One Capital Markets, Inc.
Donaldson, Lufkin & Jenrette Securities Corporation
Goldman, Sachs & Co.
J.P. Morgan Securities Inc.
Salomon Smith Barney Inc.
Warburg Dillon Read LLC

c/o Lehman Brothers Inc.
Three World Financial Center
New York, New York 10285

Dear Sirs:

Liberty Property Trust, a Maryland real estate investment trust (the "Company"),
and Liberty Property Limited Partnership, a Pennsylvania limited partnership
(the "Operating Partnership" and, together with the Company, the "Transaction
Entities"), each wishes to confirm as follows its agreement with Lehman Brothers
Inc., Banc One Capital Markets, Inc., Donaldson, Lufkin & Jenrette Securities
Corporation, Goldman, Sachs & Co., J.P. Morgan Securities Inc., Salomon Smith
Barney Inc. and Warburg Dillon Read LLC (the "Underwriters," which term shall
also include any underwriter substituted as hereinafter provided in Section 9 of
this Agreement), with respect to the sale by the Operating Partnership and the
purchase by the Underwriters, acting severally and not jointly, of $250,000,000
aggregate principal amount of its 7 3/4% Senior Notes due 2009 (the "Notes"), as
further described on Schedule II hereto.

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

      1. Representations, Warranties and Agreements of the Transaction Entities.
Each of the Transaction Entities, jointly and severally, represents, warrants
and agrees that, as of the date hereof:

            (a) A registration statement on Form S-3 (No. 333-43267 and any
      amendments thereto, with respect to one or more series of debt securities
      of the Operating Partnership has (i) been prepared by the Company and the
      Operating Partnership in conformity with the requirements of the United
      States Securities Act of 1933, as amended (the "Securities
<PAGE>   2
      Act") and the rules and regulations (the "Rules and Regulations") of the
      United States Securities and Exchange Commission (the "Commission")
      thereunder, (ii) been filed with the Commission under the Securities Act
      and (iii) become effective under the Securities Act; and the indenture,
      dated as of October 24, 1997 as supplemented to the date hereof (the
      "Indenture"), between the Operating Partnership and The First National
      Bank of Chicago, as trustee (the "Trustee") has been qualified, and the
      Third Supplemental Indenture, to be dated as of April 20, 1999, between
      the Operating Partnership and the Trustee (the "Supplemental Indenture"),
      pursuant to which the Notes shall be issued, will be qualified, under the
      Trust Indenture Act of 1939 (the "Trust Indenture Act"). Copies of such
      registration statements and any amendments thereto have been delivered by
      the Company to you. As used in this Agreement, "Effective Time" means, for
      such registration statement, the date and the time as of which such
      registration statement, or the most recent post-effective amendment
      thereto, if any, was declared effective by the Commission; "Effective
      Date" means, for such registration statement, the date of the Effective
      Time; "Preliminary Prospectus" means each prospectus included in such
      registration statement, or amendments thereto, before it became effective
      under the Securities Act and any prospectus filed with the Commission by
      the Company with the consent of the Underwriters pursuant to Rule 424(a)
      of the Rules and Regulations; "Registration Statement" means the
      registration statement, as amended at the respective Effective Time,
      including any documents incorporated by reference therein at such time and
      all information contained in the final prospectus filed with the
      Commission pursuant to Rule 424(b) of the Rules and Regulations and deemed
      to be a part of such registration statement as of the respective Effective
      Time pursuant to paragraph (b) of Rule 430A of the Rules and Regulations,
      and shall include any registration statement filed pursuant to Rule 462(b)
      of the Rules and Regulations; and "Prospectus" means such final
      prospectus, as first filed with the Commission pursuant to paragraph (1)
      or (4) of Rule 424(b) of the Rules and Regulations. Any reference herein
      to the Registration Statement, the Prospectus or a Preliminary Prospectus
      shall be deemed to include the documents incorporated or deemed to be
      incorporated by reference therein which were filed under the Securities
      and Exchange Act of 1934, as amended (the "Exchange Act"). For purposes of
      this Agreement, all references to the Registration Statement, any
      Preliminary Prospectus or the Prospectus or any amendment or supplement to
      any of the foregoing shall be deemed to include the copy filed with the
      Commission pursuant to its Electronic Data Gathering, Analysis and
      Retrieval system ("EDGAR").

            (b) Each Preliminary Prospectus included as part of the Registration
      Statement as originally filed or as part of any amendment or supplement
      thereto, or filed pursuant to Rule 424 under the Rules and Regulations,
      complied when so filed in all material respects with the provisions of the
      Securities Act and the rules and regulations thereunder, and each
      Preliminary Prospectus delivered to the Underwriters for use in connection
      with this offering was identical to the electronically transmitted copies
      thereof filed with the Commission pursuant to EDGAR, except to the extent
      permitted by Regulation S-T.

            (c) The Registration Statement conforms in all material respects,
      and the Prospectus and any further amendments or supplements to the
      Registration Statement or the Prospectus will,
<PAGE>   3
      when they become effective or are filed with the Commission, as the case
      may be, conform in all material respects to the requirements of the
      Securities Act, the Rules and Regulations and the Trust Indenture Act and
      the rules and regulations thereunder, and do not and will not, as of the
      applicable Effective Date (as to the Registration Statement and any
      amendment thereto) and as of the applicable filing date and at the
      Delivery Date (as defined below) (as to the Prospectus and any amendment
      or supplement thereto) contain an untrue statement of a material fact or
      omit to state a material fact required to be stated therein or necessary
      to make the statements therein not misleading (with respect to the
      Prospectus, in light of the circumstances under which they were made);
      provided that no representation or warranty is made as to information
      contained in or omitted from the Registration Statement or the Prospectus
      in reliance upon and in conformity with written information furnished to
      the Company through the Underwriters by or on behalf of any Underwriter
      specifically for inclusion therein. The Indenture conforms, and the
      Supplemental Indenture will conform, in all material respects to the
      requirements of the Trust Indenture Act and the rules and regulations
      thereunder; provided, however, that no representation or warranty is made
      as to information contained in or omitted from that part of the
      Registration Statement which shall constitute the Statement of Eligibility
      and Qualification on Form T-1 under the Trust Indenture Act of the Trustee
      under the Indenture. The Prospectus delivered to the Underwriters for use
      in connection with this offering was identical to the electronically
      transmitted copies thereof filed with the Commission pursuant to EDGAR,
      except to the extent permitted by Regulation S-T.

            (d) The documents incorporated or deemed to be incorporated by
      reference in the Registration Statement as of the applicable Effective
      Date, the Prospectus as of its date or any Preliminary Prospectus as of
      its date, complied in all material respects with the Exchange Act and the
      rules and regulations thereunder, and none of such documents, at such
      dates, contained an untrue statement of a material fact or omitted to
      state a material fact required to be stated therein or necessary to make
      the statements therein, in the light of the circumstances under which they
      were made, not misleading.

            (e) 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 either of the
      Transaction Entities, threatened by the Commission or by the state
      securities authority of any jurisdiction. No order preventing or
      suspending the use of any Preliminary Prospectus or the Prospectus has
      been issued and no proceeding for that purpose has been instituted or, to
      the knowledge of either of the Transaction Entities, after due inquiry of
      the Commission, threatened by the Commission or by the state securities
      authority of any jurisdiction.

            (f) The Company has been duly formed and is validly existing as a
      real estate investment trust in good standing under the laws of the State
      of Maryland, is duly qualified to do business and is in good standing in
      each jurisdiction in which its ownership or lease of property or the
      conduct of its business requires such qualification, and has all power and
      authority necessary to own or hold its properties, to conduct the business
      in which it is engaged and to enter into and perform its obligations under
      this Agreement. None of the subsidiaries of the Company (other than the
      Operating Partnership, Liberty Property
<PAGE>   4
      Development Corp. ("Development Corp."), Liberty Property Development
      Corp.-II ("Development-II") and Liberty Special Purpose Corp. ("SP
      Corp.")) is a "significant subsidiary," as such term is defined in Rule
      405 of the Rules and Regulations. Except as described in the Prospectus
      and other than the Property Affiliates (as defined herein) and the
      Operating Partnership, Development Corp. and SP Corp., the Company owns no
      direct or indirect equity interest in any entity, except for such
      interests as, in the aggregate, are not material to the condition,
      financial or otherwise, or the earnings, assets, business affairs or
      business prospects of the Company and its subsidiaries considered as a
      single enterprise.

            (g) All of the issued shares of beneficial interest of the Company
      have been duly and validly authorized and issued, are fully paid and
      non-assessable and conform to the description thereof contained in the
      Prospectus. Except as disclosed in the Prospectus and with respect to the
      Trust's Amended and Restated Share Incentive Plan (the "Share Incentive
      Plan"), no shares of beneficial interest of the Company are reserved for
      any purpose and except for the equity interests in the Operating
      Partnership ("Units"), the Operating Partnership's Exchangeable
      Subordinated Debentures due 2001 and options to purchase shares of
      beneficial interest issued pursuant to the Share Incentive Plan, there are
      no outstanding securities convertible into or exchangeable for any shares
      of beneficial interest of the Company, and no outstanding options, rights
      (preemptive or otherwise) or warrants to purchase or subscribe for shares
      of beneficial interest or any other securities of the Company.

            (h) The Operating Partnership has been duly formed and is validly
      existing as a limited partnership in good standing under the laws of the
      Commonwealth of Pennsylvania, is duly qualified to do business and is in
      good standing as a foreign limited partnership in each jurisdiction in
      which its ownership or lease of property or the conduct of its business
      requires such qualification, and has all partnership power and authority
      necessary to own or hold its properties, to conduct the business in which
      it is engaged and to enter into and perform its obligations under this
      Agreement. The Company is the sole general partner of the Operating
      Partnership. The limited partnership agreement of the Operating
      Partnership, as amended (the "Operating Partnership Agreement") is in full
      force and effect, and the aggregate percentage interests of the Company
      and the limited partners in the Operating Partnership are as set forth in
      the Prospectus. The owner's equity of the Operating Partnership is as set
      forth in the Prospectus under "Capitalization." All of the Units have been
      duly and validly authorized and issued, are fully paid and, to the extent
      that such interests are owned by the Company, are owned by the Company
      free and clear of all liens, encumbrances, equities or claims.

            (i) Development Corp. has been duly organized and is validly
      existing as a corporation in good standing under the laws of the
      Commonwealth of Pennsylvania, is duly qualified to do business and is in
      good standing in each jurisdiction in which its ownership or lease of
      property or the conduct of its business requires such qualification, and
      has all corporate power and authority necessary to own or hold its
      properties and to conduct the business in which it is engaged. All of the
      issued and outstanding capital stock of Development Corp. has been duly
      authorized and validly issued and is fully paid and non-assessable, has
      been offered and sold in compliance with all applicable laws (including,
      without limitation,
<PAGE>   5
      federal or state securities laws) and all of the capital stock of
      Development Corp. owned by the Operating Partnership, as described in the
      Prospectus, is owned free and clear of any security interest, mortgage,
      pledge, lien, encumbrance, claim, restriction or equities. No shares of
      capital stock of Development Corp. are reserved for any purpose, and there
      are no outstanding securities convertible into or exchangeable for any
      capital stock of Development Corp., and no outstanding options, rights
      (preemptive or otherwise) or warrants to purchase or to subscribe for
      shares of such capital stock or any other securities of Development Corp.

            (j) Development-II has been duly organized and is validly existing
      as a corporation in good standing under the laws of the Commonwealth of
      Pennsylvania, is duly qualified to do business and is in good standing in
      each jurisdiction in which its ownership or lease of property or the
      conduct of its business requires such qualification, and has all corporate
      power and authority necessary to own or hold its properties and to conduct
      the business in which it is engaged. All of the issued and outstanding
      capital stock of Development-II has been duly authorized and validly
      issued and is fully paid and non-assessable, has been offered and sold in
      compliance with all applicable laws (including, without limitation,
      federal or state securities laws) and all of the capital stock of
      Development-II owned by the Operating Partnership, as described in the
      Prospectus, is owned free and clear of any security interest, mortgage,
      pledge, lien, encumbrance, claim, restriction or equities. No shares of
      capital stock of Development-II are reserved for any purpose, and there
      are no outstanding securities convertible into or exchangeable for any
      capital stock of Development-II, and no outstanding options, rights
      (preemptive or otherwise) or warrants to purchase or to subscribe for
      shares of such capital stock or any other securities of Development-II.

            (k) SP Corp. has been duly organized and is validly existing as a
      corporation in good standing under the laws of the Commonwealth of
      Pennsylvania, is duly qualified to do business and is in good standing as
      a foreign corporation in each jurisdiction in which its ownership or lease
      of property or the conduct of its business requires such qualification,
      and has all corporate power and authority necessary to own or hold its
      properties and to conduct the business in which it is engaged. All of the
      issued and outstanding capital stock of SP Corp. has been duly authorized
      and validly issued and is fully paid and non-assessable, has been offered
      and sold in compliance with all applicable laws (including, without
      limitation, federal or state securities laws) and all of the capital stock
      of SP Corp. is owned by the Company free and clear of any security
      interest, mortgage, pledge, lien, encumbrance, claim, restriction or
      equities. No shares of capital stock of SP Corp. are reserved for any
      purpose, and there are no outstanding securities convertible into or
      exchangeable for any capital stock of SP Corp. and no outstanding options,
      rights (preemptive or otherwise) or warrants to purchase or to subscribe
      for shares of such capital stock or any other securities of SP Corp.

            (l) Each of those certain partnerships, limited liability companies
      or other entities holding title to one or more of the Properties (the
      "Property Affiliates") are the only entities other than the Operating
      Partnership, SP Corp., Liberty Property Philadelphia Corp., a Pennsylvania
      corporation and Liberty Property Philadelphia Trust, a Pennsylvania trust,
      through which the Company and the Operating Partnership own interests in
      the Properties.
<PAGE>   6
      Each of the Property Affiliates has been duly organized and is validly
      existing as a limited partnership, limited liability company or other
      entity, as the case may be, is duly qualified to do business and is in
      good standing under the laws of the jurisdiction in which it was
      organized, and as the case may be, is duly qualified to do business and is
      in good standing as a foreign entity in each jurisdiction in which its
      ownership or lease of property or the conduct of its business requires
      such qualification, and has all power and authority necessary to own or
      hold its properties and to conduct the business in which it is engaged.
      Except as set forth in the Prospectus, all of the ownership interests of
      each Property Affiliate have been duly and validly authorized and issued,
      are fully paid and non-assessable and all of the ownership interests owned
      directly or indirectly by the Company and the Operating Partnership, as
      described in the Prospectus, are owned free and clear of any security
      interest, mortgage, pledge, lien, encumbrance, claim, restriction or
      equities.

            (m) The Notes have been duly and validly authorized and, when duly
      executed, authenticated, issued and delivered against payment therefor as
      provided herein and in the Indenture, will be duly and validly issued and
      outstanding, and shall constitute valid and binding obligations on the
      part of the Operating Partnership, entitled to the benefits of the
      Indenture, and enforceable against the Operating Partnership in accordance
      with their terms. Upon payment of the purchase price and delivery of the
      Notes in accordance herewith, each of the Underwriters will receive good,
      valid and marketable title to the Notes, free and clear of all security
      interests, mortgages, pledges, liens, encumbrances, claims, restrictions
      and equities.

            (n) The Indenture has been, and the Supplemental Indenture will be,
      duly authorized, and when duly executed and delivered by the Operating
      Partnership (assuming due execution and delivery by the Trustee), shall
      constitute a valid and binding agreement on the part of the Operating
      Partnership, enforceable against the Operating Partnership in accordance
      with its terms; the Notes, the Indenture and the Supplemental Indenture
      conform in all material respects to the descriptions thereof contained in
      the Prospectus.

            (o) (A) This Agreement has been duly and validly authorized,
      executed and delivered by each of the Transaction Entities, and assuming
      due authorization, execution and delivery by the Underwriters, is a valid
      and binding agreement of each of the Transaction Entities, enforceable
      against the Transaction Entities in accordance with its terms; and (B) the
      Operating Partnership Agreement and the partnership agreement of each
      Property Affiliate, has been duly and validly authorized, executed and
      delivered by the parties thereto and is a valid and binding agreement of
      the parties thereto, enforceable against such parties in accordance with
      its terms.

            (p) The execution, delivery and performance of this Agreement by
      each of the Transaction Entities, the execution, delivery and performance
      of the Indenture by the Operating Partnership and the consummation of the
      transactions contemplated hereby and thereby will not conflict with or
      result in a breach or violation of any of the terms or provisions of, or
      constitute a default under, any indenture, mortgage, deed of trust, loan
      agreement or other agreement or instrument to which either of the
      Transaction Entities is a party or by which either of the Transaction
      Entities is bound or to which any of the
<PAGE>   7
      Properties or other assets of either of the Transaction Entities is
      subject, nor will such actions result in any violation of the provisions
      of the charter, by-laws, certificate of limited partnership or agreement
      of limited partnership of either of the Transaction Entities, or any
      statute or any order, rule or regulation of any court or governmental
      agency or body having jurisdiction over either of the Transaction Entities
      or any of their properties or assets; and except for the registration of
      the Notes under the Securities Act and the qualification of the Indenture
      under the Trust Indenture Act and such consents, approvals,
      authorizations, registrations or qualifications as may be required under
      the Exchange Act and applicable state securities laws in connection with
      the purchase and distribution of the Notes by the Underwriters, no
      consent, approval, authorization or order of, or filing or registration
      with, any such court or governmental agency or body is required for the
      execution, delivery and performance of this Agreement by the Transaction
      Entities or the Indenture by the Operating Partnership, the consummation
      of the transactions contemplated hereby and thereby, and the issuance and
      delivery of the Notes.

            (q) No event has occurred and is continuing that, had the Notes been
      issued, would (whether or not with the giving of notice and/or the passage
      of time and/or the fulfillment of any other requirement) constitute an
      Event of Default (as defined in the Indenture) under the Indenture.

            (r) Other than as described in the Prospectus, as disclosed to
      Lehman Brothers Inc. and other than rights of certain persons who have
      contributed Properties to the Partnership in exchange for Units and
      persons whose securities are already registered under the Securities Act,
      there are no contracts, agreements or understandings between the
      Transaction Entities and any person granting such person the right to
      require the Company to file a registration statement under the Securities
      Act with respect to any securities of either of the Transaction Entities
      owned or to be owned by such person or to require either of the
      Transaction Entities to include such securities in the securities
      registered pursuant to the Registration Statement or in any securities
      being registered pursuant to any other registration statement filed by the
      Transaction Entities under the Securities Act.

            (s) Except as described or contemplated in the Prospectus or
      pursuant to the Share Incentive Plan, neither Transaction Entity has sold
      or issued any securities during the six-month period preceding the date of
      the Prospectus, including any sales pursuant to Rule 144A or Regulations D
      or S under, the Securities Act.

            (t) Neither of the Transaction Entities nor any of the Properties
      has sustained, since the date of the latest audited financial statements
      included in the Prospectus, any material loss or interference with its
      business from fire, explosion, flood or other calamity, whether or not
      covered by insurance, or from any labor dispute or court or governmental
      action, order or decree, other than as set forth or contemplated in the
      Prospectus; and, since such date, there has not been any material change
      in the capital stock or long-term debt of either of the Transaction
      Entities or any material adverse change, or any development involving a
      prospective material adverse change, in or affecting the Properties or the
      general affairs, management, financial position, shareholders' equity or
      results of operations of either of the Transaction Entities, other than as
      set forth or contemplated in the Prospectus.
<PAGE>   8
            (u) The financial statements (including the related notes and
      supporting schedules thereto) filed as part of, or incorporated by
      reference in, the Registration Statement and the Prospectus present fairly
      the financial condition and results of operations of the entities
      purported to be shown thereby, at the dates and for the periods indicated,
      and have been prepared in conformity with generally accepted accounting
      principles applied on a consistent basis throughout the periods involved.
      The Company's ratios of earnings to fixed charges (actual and, if any, pro
      forma) included in the Prospectus under the captions "Certain Ratios" and
      in Exhibit 12.1 to the Current Report on Form 8-K to be filed by the
      Transaction Entities promptly after the date hereof (the "Form 8-K") have
      been calculated in compliance with Item 503(d) of Regulation S-K of the
      Commission. Pro forma financial information included in or incorporated by
      reference in the Registration Statement and the Prospectus has been
      prepared in accordance with the applicable requirements of the Securities
      Act, the Rules and Regulations and AICPA guidelines with respect to pro
      forma financial information and includes all adjustments necessary to
      present fairly the pro forma financial position of the respective entity
      or entities presented therein at the respective dates indicated and the
      results of operations for the respective periods specified.

            (v) Ernst & Young LLP, who have certified certain financial
      statements of the Operating Partnership, whose reports appear in the
      Prospectus or are incorporated by reference therein and who have delivered
      the initial letter referred to in Section 7(f) hereof, are independent
      public accountants as required by the Securities Act and the Rules and
      Regulations.

            (w) (A) The Operating Partnership and the Property Affiliates have
      good and marketable title to each of the Properties, free and clear of all
      liens, encumbrances, claims, security interests and defects, other than
      those referred to in the Prospectus, those relating to certain
      intra-company debt with respect to Development and Development-II or those
      which are not material in amount or those which would not have a material
      adverse effect on the business, operations, use or value of any of the
      Properties; (B) all liens, charges, encumbrances, claims or restrictions
      on or affecting any of the Properties and the assets of any Transaction
      Entity which are required to be disclosed in the Prospectus are disclosed
      therein; (C) except as otherwise described in the Prospectus, neither
      Transaction Entity and, to the knowledge of the Transaction Entities, no
      tenant of any of the Properties is in default under (i) any space leases
      (as lessor or lessee, as the case may be) relating to the Properties, or
      (ii) any of the mortgages or other security documents or other agreements
      encumbering or otherwise recorded against the Properties, in each case
      which default would have a material adverse effect on the applicable
      Property, and neither Transaction Entity knows of any event which, but for
      the passage of time or the giving of notice, or both, would constitute
      such a default under any of such documents or agreements; (D) each of the
      Properties complies with all applicable codes, laws and regulations
      (including, without limitation, building and zoning codes, laws and
      regulations and laws relating to access to the Properties), except for
      such failures to comply that would not have a material adverse effect on
      the business operations, use or value of such Property; and (E) neither
      Transaction Entity has knowledge of any pending or threatened condemnation
      proceedings, zoning change or other proceeding or action that will in any
      material manner adversely affect the size of, use of, improvements on,
      construction on or access to the Properties.
<PAGE>   9
            (x) The mortgages and deeds of trust which encumber the Properties
      are not convertible into equity securities of the entity owning such
      Property and said mortgages and deeds of trust are not cross-defaulted or
      cross-collateralized with any property other than other Properties.

            (y) The Operating Partnership and the Property Affiliates have
      obtained title insurance on the fee or leasehold interests in each of the
      Properties, in an amount at least equal to the greater of (A) the mortgage
      indebtedness of each such Property or (B) the purchase price (exclusive of
      improvements) of each such Property.

            (z) Except as disclosed in the Prospectus and except such as in each
      case would not have a material adverse effect on any Property, Property
      Affiliate, or Transaction Entity or any of their subsidiaries, taken
      together as a whole; (A) to the knowledge of the Transaction Entities,
      after due inquiry, the operations of the Company, the Operating
      Partnership, Development Corp., Development II, SP Corp., and the
      Properties are in compliance with all Environmental Laws (as defined
      below) and all requirements of applicable permits, licenses, approvals and
      other authorizations issued pursuant to Environmental Laws; (B) to the
      knowledge of the Transaction Entities, after due inquiry, none of the
      Transaction Entities, the Property Affiliates or any Property 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 could 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 Transaction Entities or Property
      Affiliates has received any written notice of a 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) neither of
      the Transaction Entities has actual knowledge of, or received any written
      notice from any Governmental Authority (as defined below) claiming, any
      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
      Transaction Entities, 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 on the
      Comprehensive Environmental Response, Compensation, and Liability
      Information System database maintained by the EPA, and neither of the
      Transaction Entities 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 Transaction
      Entities, 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
<PAGE>   10
      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 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 discard of barrels, containers,
      tanks (including, without limitation, underground storage tanks) or other
      receptacles containing or previously containing any Hazardous Substance.

            (aa) Each Transaction Entity and their subsidiaries, and each
      Property carries, or is covered by, insurance in such amounts and covering
      such risks as is adequate for the conduct of its business and the value of
      such Property and as is customary for companies engaged in similar
      businesses in similar industries.

            (bb) Each Transaction Entity owns or possesses adequate rights to
      use all material patents, patent applications, trademarks, service marks,
      trade names, trademark registrations, service mark registrations,
      copyrights and licenses necessary for the conduct of its business and has
      no reason to believe that the conduct of its business will conflict with,
      and has not received any notice of any claim of conflict with, any such
      rights of others.

            (cc) Except as described in the Prospectus, there are no legal or
      governmental proceedings pending to which either Transaction Entity or
      their subsidiaries is a party or of which any property or assets of either
      Transaction Entity or their subsidiaries is the subject which, if
      determined adversely to such Transaction Entity or subsidiary, could
      reasonably be expected to have a material adverse effect on the
      consolidated financial position, shareholders' equity, results of
      operations, business or prospects of the Company; and to the knowledge of
      the Transaction Entities, no such proceedings are threatened or
      contemplated by governmental authorities or threatened by others.
<PAGE>   11
            (dd) There are no contracts or other documents which are required to
      be described in the Prospectus or filed as exhibits to the Registration
      Statement by the Securities Act or by the Rules and Regulations which have
      not been described in the Prospectus or filed as exhibits to the
      Registration Statement or incorporated therein by reference as permitted
      by the Rules and Regulations.

            (ee) No relationship, direct or indirect, exists between or among
      either of the Transaction Entities on the one hand, and the trustees,
      officers, shareholders, customers or suppliers of the Transaction Entities
      on the other hand, that is required to be described in the Prospectus that
      is not so described.

            (ff) No labor disturbance by the employees of either Transaction
      Entity exists or, to the knowledge of the Transaction Entities, is
      imminent which might be expected to have a material adverse effect on the
      consolidated financial position, shareholders' equity, results of
      operations, business or prospects of such Transaction Entity.

            (gg) Each Transaction Entity is in compliance in all material
      respects with all presently applicable provisions of the Employee
      Retirement Income Security Act of 1974, as amended, including the
      regulations and published interpretations thereunder ("ERISA"); no
      "reportable event" (as defined in ERISA) has occurred with respect to any
      "pension plan" (as defined in ERISA) for which either Transaction Entity
      would have any liability; neither Transaction Entity has incurred or
      expects to incur liability under (i) Title IV of ERISA with respect to
      termination of, or withdrawal from, any "pension plan" or (ii) sections
      412 or 4971 of the Internal Revenue Code of 1986, as amended, including
      the regulations and published interpretations thereunder (the "Code"); and
      each "pension plan" for which either Transaction Entity would have any
      liability that is intended to be qualified under section 401(a) of the
      Code is so qualified in all material respects and nothing has occurred,
      whether by action or by failure to act, which would cause the loss of such
      qualification.

            (hh) Each Transaction Entity and their subsidiaries has filed all
      federal, state and local income and franchise tax returns required to be
      filed through the date hereof and has paid all taxes due thereon, and no
      material tax deficiency has been determined adversely to either
      Transaction Entity or their subsidiaries which has had (nor does either
      Transaction Entity have any knowledge of any tax deficiency which, if
      determined adversely to it might have) a material adverse effect on the
      financial position, shareholders' equity, results of operations, business
      or prospects of such Transaction Entity or subsidiary.

            (ii) At all times since June 16, 1994, the Company, the Operating
      Partnership, Development Corp., Development II, and SP Corp. have been,
      and upon the sale of the Notes will continue to be, organized and operated
      in conformity with the requirements for qualification of the Company as a
      real estate investment trust under the Code and the proposed method of
      operation of the Company, the Operating Partnership, Development Corp. and
      SP Corp. will enable the Company to continue to meet the requirements for
      qualification and taxation as a real estate investment trust under the
      Code.

            (jj) Since the date as of which information is given in the
      Prospectus through the date hereof, and except as may otherwise be
      disclosed or contemplated in the Prospectus, neither
<PAGE>   12
      Transaction Entity has (i) issued or granted any securities, (ii) incurred
      any liability or obligation, direct or contingent, other than liabilities
      and obligations which were incurred in the ordinary course of business,
      (iii) entered into any transaction not in the ordinary course of business
      nor (iv) declared or paid any dividend on its capital stock (other than
      regular quarterly dividends).

            (kk) Each Transaction Entity and their subsidiaries (i) makes and
      keeps accurate books and records and (ii) maintains internal accounting
      controls which provide reasonable assurance that (A) transactions are
      executed in accordance with management's authorization, (B) transactions
      are recorded as necessary to permit preparation of its financial
      statements and to maintain accountability for its assets, (C) access to
      its assets is permitted only in accordance with management's authorization
      and (D) the reported accountability for its assets is compared with
      existing assets at reasonable intervals.

            (ll) No Transaction Entity or any of their subsidiaries (i) is in
      violation of its charter, by-laws, certificate of limited partnership,
      agreement of limited partnership or other similar organizational document,
      (ii) is in default in any material respect, and no event has occurred
      which, with notice or lapse of time or both, would constitute such a
      default, in the due performance or observance of any term, covenant or
      condition contained in any material indenture, mortgage, deed of trust,
      loan agreement or other agreement or instrument to which it is a party or
      by which it is bound or to which any of the Properties or any of its other
      properties or assets is subject or (iii) is in violation in any material
      respect of any law, ordinance, governmental rule, regulation or court
      decree to which it or the Properties or any of its other properties or
      assets may be subject or has failed to obtain any material license,
      permit, certificate, franchise or other governmental authorization or
      permit necessary to the ownership of the Properties or any of its other
      properties or assets or to the conduct of its business.

            (mm) Neither Transaction Entity, nor any trustee, officer, agent,
      employee or other person associated with or acting on behalf of either
      Transaction Entity, has used any corporate funds for any unlawful
      contribution, gift, entertainment or other unlawful expense relating to
      political activity; made any direct or indirect unlawful payment to any
      foreign or domestic government official or employee from corporate funds;
      violated or is in violation of any provision of the Foreign Corrupt
      Practices Act of 1977; or made any bribe, rebate, payoff, influence
      payment, kickback or other unlawful payment.

            (nn) Neither Transaction Entity or any of their subsidiaries is an
      "investment company" within the meaning of such term under the Investment
      Company Act of 1940 and the rules and regulations of the Commission
      thereunder.

            (oo) Other than this Agreement and as set forth in the Prospectus
      under the heading "Underwriting," there are no contracts, agreements or
      understandings between either Transaction Entity and any person that would
      give rise to a valid claim against either Transaction Entity or any
      Underwriter for a brokerage commission, finder's fee or other like payment
      with respect to the consummation of the transactions contemplated by this
      Agreement.
<PAGE>   13
            (pp) Each Transaction Entity has complied with all applicable
      provisions of Florida Statutes Section 517.075, relating to issuers doing
      business with Cuba.

      2. Purchase of the Notes by the Underwriters. On the basis of the
representations and warranties contained in, and subject to the terms and
conditions of, this Agreement, the Operating Partnership agrees to sell to the
several Underwriters, and each of the Underwriters, severally and not jointly,
agrees to purchase from the Operating Partnership, the respective principal
amount of Notes set forth opposite that Underwriter's name in Schedule I hereto
at the purchase price set forth in Schedule II hereto plus accrued interest, if
any, from the date specified in Schedule II hereto to the date of payment and
delivery.

      3. Offering of Notes by the Underwriters. The several Underwriters propose
to offer the Notes for sale upon the terms and conditions set forth in the
Prospectus.

      4. Delivery of and Payment for the Notes. Delivery of and payment for the
Notes shall be made at the office of Rogers & Wells LLP, 200 Park Avenue, New
York, New York 10166, at 10:00 A.M., New York City time, on the third full
business day following the date of this Agreement or on the fourth full business
day if this Agreement is executed after the daily closing time of the New York
Stock Exchange (unless postponed in accordance with the provisions of Section 9
hereof), or at such other date or place as shall be determined by agreement
between the Underwriters and the Operating Partnership. This date and time are
sometimes referred to as the "Delivery Date." On the Delivery Date, the
Operating Partnership shall deliver or cause to be delivered the Notes to the
Underwriters for the account of each Underwriter against payment to or upon the
order of the Operating Partnership of the purchase price by certified or
official bank check or checks payable in same day funds or, at the discretion of
the Operating Partnership, by wire transfer in same day funds. Time shall be of
the essence, and delivery at the time and place specified pursuant to this
Agreement is a further condition of the obligation of each Underwriter
hereunder. Upon delivery, the Notes shall be registered in such names and in
such denominations as the Underwriters shall request in writing not less than
two full business days prior to the Delivery Date. For the purpose of expediting
the checking and packaging of the Notes, the Operating Partnership shall make
the Notes available for inspection by the Underwriters in New York, New York,
not later than 2:00 P.M., New York City time, on the business day prior to the
Delivery Date.

      5. Further Agreements of the Transaction Entities. Each of the Transaction
Entities jointly and severally agrees:

            (a) To prepare the Prospectus in a form approved by the Underwriters
      and to file such Prospectus pursuant to Rule 424(b) under the Securities
      Act not later than the Commission's close of business on the second
      business day following the execution and delivery of this Agreement or, if
      applicable, such earlier time as may be required by Rule 430A(a)(3) under
      the Securities Act; to make no further amendment or any supplement to the
      Registration Statement or to the Prospectus except in accordance with
      Section 5(e) hereof and except for the Form 8-K; to advise the
      Underwriters, promptly after it receives notice thereof, of the time when
      any amendment to the Registration Statement has been filed or becomes
      effective or any supplement to the Prospectus or any amended Prospectus
      has been filed and to furnish the Underwriters with copies thereof; to
      advise the Underwriters, promptly after it receives
<PAGE>   14
      notice thereof, of the issuance by the Commission of any stop order or of
      any order preventing or suspending the use of any Preliminary Prospectus
      or the Prospectus, of the suspension of the qualification of the Notes for
      offering or sale in any jurisdiction, of the initiation or threatening of
      any proceeding for any such purpose, or of any request by the Commission
      for the amending or supplementing of the Registration Statement or the
      Prospectus or for additional information; and, in the event of the
      issuance of any stop order or of any order preventing or suspending the
      use of any Preliminary Prospectus or the Prospectus or suspending any such
      qualification, to use promptly its best efforts to obtain its withdrawal;

            (b) To furnish promptly to the Underwriters and to counsel for the
      Underwriters such number of conformed copies as the Underwriters shall
      reasonably request of the Registration Statement as originally filed with
      the Commission, and each amendment thereto filed with the Commission,
      including all consents and exhibits filed therewith or incorporated by
      reference therein and all documents incorporated by reference therein;

            (c) To deliver promptly to the Underwriters such number of the
      following documents as the Underwriters shall reasonably request: (i)
      conformed copies of the Registration Statement as originally filed with
      the Commission and each amendment thereto (in each case excluding exhibits
      other than this Agreement) and (ii) each Preliminary Prospectus, the
      Prospectus and any amended or supplemented Prospectus; and, if the
      delivery of a prospectus is required at any time after the applicable
      Effective Time in connection with the offering or sale of the Notes or any
      other securities relating thereto and if at such time any events shall
      have occurred as a result of which the Prospectus as then amended or
      supplemented would include an untrue statement of a material fact or omit
      to state any material fact necessary in order to make the statements
      therein, in the light of the circumstances under which they were made when
      such Prospectus is delivered, not misleading, or, if for any other reason
      it shall be necessary to amend or supplement the Prospectus in order to
      comply with the Securities Act or the Exchange Act, to notify the
      Underwriters and, upon their request, to file such document and to prepare
      and furnish without charge to each Underwriter and to any dealer in
      securities as many copies as the Underwriters may from time to time
      reasonably request of an amended or supplemented Prospectus which will
      correct such statement or omission or effect such compliance. The
      aforementioned documents 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) To file promptly with the Commission any amendment to the
      Registration Statement or the Prospectus or any supplement to the
      Prospectus that may, in the judgment of the Company or counsel for the
      Underwriters, be required by the Securities Act or requested by the
      Commission;

            (e) Prior to filing with the Commission any amendment to the
      Registration Statement or supplement to the Prospectus or any Prospectus
      pursuant to Rule 424 of the Rules and Regulations, to furnish a copy
      thereof to the Underwriters and counsel for the Underwriters
<PAGE>   15
      within a reasonable period of time prior to the filing thereof, and that
      filing thereof shall not occur if the Underwriters shall have objected in
      good faith thereto;

            (f) The Operating Partnership will make generally available to its
      security holders as soon as practicable but no later than 60 days after
      the close of the period covered thereby an earnings statement (in form
      complying with the provisions of Section 11(a) of the Securities Act and
      Rule 158 of the Rules and Regulations), which need not be certified by
      independent certified public accountants unless required by the Securities
      Act or the Rules and Regulations, covering a twelve-month period
      commencing after the "effective date" (as defined in said Rule 158) of the
      Registration Statement;

            (g) For a period of five years following the applicable Effective
      Date, to furnish to the Underwriters copies of all materials furnished by
      the Operating Partnership to its shareholders and all public reports and
      all reports and financial statements furnished by the Operating
      Partnership to the Commission pursuant to the Exchange Act or any rule or
      regulation of the Commission thereunder;

            (h) Promptly from time to time to take such action as the
      Underwriters may reasonably request to qualify the Notes for offering and
      sale under the securities, real estate syndication or Blue Sky laws of
      such jurisdictions as the Underwriters may request and to comply with such
      laws so as to permit the continuance of sales and dealings therein in such
      jurisdictions for as long as may be necessary to complete the distribution
      of the Notes, except that the Operating Partnership shall not be required
      in connection therewith to qualify as a foreign corporation or to execute
      a consent to service of process in any jurisdiction;

            (i) Until the Delivery Date, neither the Operating Partnership nor
      the Company will, directly or indirectly, offer for sale, contract to
      sell, sell or otherwise dispose of, or register for sale under the
      Securities Act, any debt securities, or sell or grant options, rights or
      warrants with respect to any debt securities, without the prior written
      consent of Lehman Brothers Inc.;

            (j) To apply the net proceeds from the sale of the Notes in
      accordance with the description set forth in the Prospectus under the
      caption "Use of Proceeds";

            (k) To take such steps as shall be necessary to ensure that neither
      the Company, the Operating Partnership nor any of their subsidiaries shall
      become an "investment company" within the meaning of such term under the
      Investment Company Act of 1940 and the rules and regulations of the
      Commission thereunder;

            (l) Except as stated in this Agreement and in the Preliminary
      Prospectus and Prospectus, neither Transaction Entity has taken, nor will
      take, directly or indirectly, any action designed to or that might
      reasonably be expected to cause or result in stabilization or manipulation
      of the price of the Notes to facilitate the sale or resale of the Notes;

            (m) The Company will use its best efforts to continue to meet the
      requirements to qualify as a "real estate investment trust" under the
      Code; and
<PAGE>   16
            (n) If this Agreement shall be terminated by the Underwriters
      because of any failure or refusal on the part of the Transaction Entities
      to comply with the terms or fulfill any of the conditions of this
      Agreement, the Transaction Entities jointly and severally agree to
      reimburse the Underwriters for all reasonable out-of-pocket expenses
      (including fees and expenses of counsel for the Underwriters) incurred by
      the Underwriters in connection herewith.

      6. Expenses. The Transaction Entities jointly and severally agree to pay
(a) the costs incident to the authorization, issuance, sale and delivery of the
Notes and any taxes payable in connection therewith; (b) the costs incident to
the preparation, printing and filing under the Securities Act of the
Registration Statement and any amendments and exhibits thereto; (c) the costs of
distributing the Registration Statement as originally filed and each amendment
thereto and any post-effective amendments thereof (including, in each case,
exhibits), any Preliminary Prospectus, the Prospectus and any amendment or
supplement to the Prospectus, all as provided in this Agreement; (d) the costs
of producing and distributing this Agreement and any other related documents in
connection with the offering, purchase, sale and delivery of the Notes; (e) the
filing fees incident to securing any required review by the National Association
of Securities Dealers, Inc. of the terms of sale of the Notes; (f) any
applicable listing or other fees; (g) the fees and expenses of qualifying the
Notes under the securities laws of the several jurisdictions as provided in
Section 5(h) and of preparing, printing and distributing a Blue Sky Memorandum
(including related fees and expenses of counsel to the Underwriters); (h) the
fees paid to rating agencies in connection with the rating of the Notes; and (i)
all other costs and expenses incident to the performance of the obligations of
the Transaction Entities under this Agreement; provided that, except as provided
in this Section 6 and in Section 12, the Underwriters shall pay their own costs
and expenses, including the costs and expenses of their counsel, any transfer
taxes on the Notes which they may sell and the expenses of advertising any
offering of the Notes made by the Underwriters.

      7. Conditions of Underwriters' Obligations. The respective obligations of
the Underwriters hereunder are subject to the accuracy, when made and on the
Delivery Date, of the representations and warranties of the Transaction Entities
contained herein, to the performance by each Transaction Entity of its
obligations hereunder, and to each of the following additional terms and
conditions:

            (a) If, at the time this Agreement is executed and delivered, it is
      necessary for the Registration Statement or a post-effective amendment
      thereto to be declared effective before the offering of the Notes may
      commence, the Registration Statement or such post-effective amendment
      shall have become effective not later than 5:30 P.M., New York City time,
      on the date hereof, or at such later date and time as shall be consented
      to in writing by you, and all filings, if any, required to have been made
      by such time by Rules 424 and 430A under the Rules and Regulations shall
      have been timely made; no stop order suspending the effectiveness of the
      Registration Statement shall have been issued and no proceeding for that
      purpose shall have been instituted or, to the knowledge of the Transaction
      Entities or any Underwriter, threatened by the Commission, and any request
      of the Commission for additional information (to be included in the
      Registration Statement or the Prospectus or otherwise) shall have been
      complied with to the satisfaction of the Underwriters.
<PAGE>   17
            (b) Subsequent to the effective date of this Agreement, there shall
      not have occurred (i) any change, or any development involving a
      prospective change, in or affecting the condition, financial or otherwise,
      business, properties, net worth, or results of operations of either
      Transaction Entity or any of their subsidiaries or any Property not
      contemplated by the Prospectus, which in the reasonable opinion of the
      Underwriters, would materially adversely affect the market for the Notes,
      or (ii) any event or development relating to or involving either
      Transaction Entity, or any partner, officer, director or trustee of either
      Transaction Entity, which makes any statement of a material fact made in
      the Prospectus untrue or which, in the reasonable opinion of the Company
      and its counsel or the Underwriters and their counsel, requires the making
      of any addition to or change in the Prospectus in order to state a
      material fact required by the Securities Act or any other law to be stated
      therein or necessary in order to make the statements therein not
      misleading, if amending or supplementing the Prospectus to reflect such
      event or development would, in the reasonable opinion of the Underwriters
      or their counsel, materially adversely affect the market for the Notes.

            (c) All corporate and partnership proceedings and other legal
      matters incident to the authorization, form and validity of this
      Agreement, the Indenture, the Notes, the Registration Statement and the
      Prospectus, and all other legal matters relating to this Agreement, the
      Indenture, the Notes, the Registration Statement and the Prospectus and
      the transactions contemplated hereby and thereby shall be reasonably
      satisfactory in all material respects to counsel for the Underwriters, and
      the Transaction Entities shall have furnished to such counsel all
      documents and information that they may reasonably request to enable them
      to pass upon such matters.

            (d) (A) Wolf, Block, Schorr and Solis-Cohen LLP shall have furnished
      to the Underwriters its written opinion, as counsel to the Transaction
      Entities, addressed to the Underwriters and dated the Delivery Date, in
      form and substance reasonably satisfactory to the Underwriters, to the
      effect that:

                  (i) The Company is in good standing as a foreign trust or
            corporation in those jurisdictions listed in such opinion.

                  (ii) The Operating Partnership has been duly formed and is
            validly existing as a limited partnership under the laws of the
            Commonwealth of Pennsylvania, is duly qualified to do business as a
            foreign limited partnership in Delaware, Florida, Kansas, Maryland,
            Michigan, Minnesota, New Jersey, North Carolina, South Carolina,
            Tennessee, Texas, Virginia and Wisconsin, and has all partnership
            power and authority necessary to own or hold its properties, to
            conduct the business in which it is engaged as described in the
            Registration Statement and the Prospectus, and to enter into and
            perform its obligations under this Agreement. The Company is the
            sole general partner of the Operating Partnership. The Operating
            Partnership Agreement is in full force and effect, and the aggregate
            percentage interests of the Company and the limited partners in the
            Operating Partnership are as set forth in the Prospectus. All of the
            partnership interests of the Operating Partnership have been duly
            and validly authorized and issued,
<PAGE>   18
            are fully paid and, to the extent that such interests are owned by
            the Company, are owned by the Company free and clear of all liens,
            encumbrances, equities or claims.

                  (iii) Development Corp. has been duly formed and is validly
            existing as a corporation in good standing under the laws of the
            Commonwealth of Pennsylvania, is duly qualified to do business and
            is in good standing as a foreign corporation in Delaware, Florida,
            Maryland, Michigan, Minnesota, New Jersey, North Carolina, Virginia
            and Wisconsin, and has all corporate power and authority necessary
            to own or hold its properties and to conduct the business in which
            it is engaged as described in the Registration Statement and the
            Prospectus. All of the issued and outstanding capital stock of
            Development Corp. has been duly authorized and validly issued and is
            fully paid and non-assessable, has been offered and sold in
            compliance with all applicable laws (including, without limitation,
            federal or state securities laws) and all of the capital stock of
            Development Corp. owned by the Operating Partnership, as described
            in the Prospectus, is owned free and clear of any security interest,
            mortgage, pledge, lien, encumbrance, claim, restriction or equities.

                  (iv) Development-II has been duly formed and is validly
            existing as a corporation in good standing under the laws of the
            Commonwealth of Pennsylvania, is duly qualified to do business and
            is in good standing as a foreign corporation in South Carolina, and
            has all corporate power and authority necessary to own or hold its
            properties and to conduct the business in which it is engaged as
            described in the Registration Statement and the Prospectus. All of
            the issued and outstanding capital stock of Development-II has been
            duly authorized and validly issued and is fully paid and
            non-assessable, has been offered and sold in compliance with all
            applicable laws (including, without limitation, federal or state
            securities laws) and all of the capital stock of Development-II
            owned by the Operating Partnership, as described in the Prospectus,
            is owned free and clear of any security interest, mortgage, pledge,
            lien, encumbrance, claim, restriction or equities.

                  (v) SP Corp. has been duly formed and is validly existing as a
            corporation in good standing under the laws of the Commonwealth of
            Pennsylvania and has all corporate and authority necessary to own or
            hold its properties and to conduct the business in which it is
            engaged as described in the Registration Statement and the
            Prospectus. All of the issued and outstanding capital stock of SP
            Corp. has been duly authorized and validly issued and is fully paid
            and non-assessable, is owned by the Company free and clear of any
            security interest, mortgage, pledge, lien, encumbrance, claim,
            restriction or equities and has been offered and sold in compliance
            with all applicable laws (including, without limitation, federal or
            state securities laws).

                  (vi) Each of the Property Affiliates has been duly organized
            and is validly existing as a limited partnership, limited liability
            company or other entity in good standing under the laws of the
            jurisdiction in which it was organized, and has all power and
            authority necessary to own or hold its properties and to conduct the
            business in which it is engaged. Except as set forth in the
            Prospectus, all of the partnership interests, membership interests
            or other equity interests, as the case may be, of each Property
<PAGE>   19
            Affiliate have been duly and validly authorized and issued, are
            fully paid and non-assessable and all such interests owned directly
            or indirectly by the Company and the Operating Partnership, as
            described in the Prospectus, are owned free and clear of any
            security interest, mortgage, pledge, lien, encumbrance, claim,
            restriction or equities.

                  (vii) (A) This Agreement has been duly and validly authorized,
            executed and delivered by the Operating Partnership, and has been
            duly and validly executed and delivered by the Company, and assuming
            due authorization, execution and delivery by the Underwriters and
            due authorization by the Company, is a valid and binding agreement
            of the Operating Partnership; and (B) the Operating Partnership
            Agreement and the partnership agreement, limited liability company
            agreement or similar such document of each Property Affiliate, have
            been duly and validly authorized, executed and delivered by each
            Transaction Entity party thereto and are valid and binding
            agreements of the parties thereto, enforceable against such parties
            in accordance with their terms.

                  (viii) The Indenture has been duly authorized, executed and
            delivered by the Operating Partnership and (assuming due execution
            and delivery by the Trustee) constitutes a valid and binding
            agreement on the part of the Operating Partnership, enforceable
            against the Operating Partnership in accordance with its terms; the
            Indenture conforms in all material respects to the descriptions
            thereof contained in the Prospectus.

                  (ix) The Notes have been duly authorized, executed, issued and
            delivered by the Operating Partnership, and constitute valid and
            binding obligations of the Operating Partnership entitled to the
            benefits of the Indenture and enforceable against the Operating
            Partnership in accordance with their terms. Upon payment of the
            purchase price and delivery of the Notes in accordance herewith,
            each of the Underwriters will receive good, valid and marketable
            title to the Notes, which to such counsel's knowledge, after due
            inquiry, are free and clear of all security interests, mortgages,
            pledges, liens, encumbrances, claims, restrictions and equities. The
            terms of the Notes conform to all statements and descriptions
            related thereto contained in the Prospectus. The Notes rank and will
            rank on a parity with all unsecured indebtedness (other than
            subordinated indebtedness of the Operating Partnership that is
            outstanding on the date thereof or that may be incurred thereafter),
            and senior to all subordinated indebtedness of the Operating
            Partnership that is outstanding on the date thereof or that may be
            incurred thereafter, except that the Notes will be effectively
            subordinated to the prior claims of each secured mortgage lender to
            any specific Property which secures such lender's mortgage.

                  (x) To the knowledge of such counsel, the execution, delivery
            and performance of this Agreement by each of the Transaction
            Entities and the consummation of the transactions contemplated
            hereby will not (i) conflict with or result in a breach or violation
            of any of the terms or provisions of, or constitute a default under,
            any indenture, mortgage, deed of trust, loan agreement or other
            agreement or instrument to which either of the Transaction Entities
            or their subsidiaries is a party or by which either of the
            Transaction Entities or their subsidiaries is bound or to which any
            of the
<PAGE>   20
            Properties or other assets of either of the Transaction Entities or
            their subsidiaries is subject, or (ii) conflict with or result in
            any violation of the provisions of any statute or any order, rule or
            regulation of any court or governmental agency or body having
            jurisdiction over either of the Transaction Entities or their
            subsidiaries or any of their properties or assets; and except for
            the registration of the Notes under the Securities Act and the
            qualification of the Indenture under the Trust Indenture Act and
            such consents, approvals, authorizations, registrations or
            qualifications as may be required under the Exchange Act and
            applicable state securities laws in connection with the purchase and
            distribution of the Notes by the Underwriters, no consent, approval,
            authorization or order of, or filing or registration with, any such
            court or governmental agency or body is required for the execution,
            delivery and performance of this Agreement or the Indenture by the
            Transaction Entities and the consummation of the transactions
            contemplated hereby and thereby, and the issuance and delivery of
            the Notes.

                  (xi) The issuance and delivery of the Notes by the Operating
            Partnership and the compliance by the Operating Partnership with all
            of the provisions of this Agreement, and the consummation of the
            transactions contemplated hereby, have been duly authorized by all
            necessary partnership action. The execution, delivery and
            performance of this Agreement by each of the Transaction Entities
            and the consummation of the transactions contemplated hereby will
            not conflict with or result in any violation of the provisions of
            the charter, by-laws, certificate of limited partnership or
            agreement of limited partnership of either of the Transaction
            Entities or their subsidiaries.

                  (xii) Except as set forth in the Prospectus, to the knowledge
            of such counsel, there are no preemptive or other rights to
            subscribe for or to purchase, nor any restriction upon the transfer
            of the Notes pursuant to the Operating Partnership's certificate of
            limited partnership, its agreement of limited partnership, as
            amended to the date hereof, or any agreement or other instrument to
            which the Operating Partnership is a party.

                  (xiii) To the knowledge of such counsel, other than as set
            forth in the Prospectus and other than certain persons who have
            contributed Properties to the Partnership in exchange for Units and
            rights of persons whose securities are already registered under the
            Securities Act, there are no contracts, agreements or understandings
            between the Company and/or the Operating Partnership, on the one
            hand, and any person, on the other, granting such person the right
            to require the Company or the Operating Partnership to file a
            registration statement under the Securities Act with respect to any
            securities of the Company or the Operating Partnership owned or to
            be owned by such person or to require the Company or the Operating
            Partnership to include such securities in the securities registered
            pursuant to the Registration Statement or in any securities being
            registered pursuant to any other registration statement filed by the
            Company or the Operating Partnership under the Securities Act.

                  (xiv) To the knowledge of such counsel, there are no legal or
            governmental proceedings pending to which either Transaction Entity
            or their subsidiaries is a party or of which any property or assets
            of either Transaction Entity or their subsidiaries is the subject
            which are not disclosed in the Prospectus and which, if determined
            adversely to
<PAGE>   21
            such Transaction Entity or subsidiary, might reasonably be expected
            to have a material adverse effect on the consolidated financial
            position, shareholders' equity, results of operations, business or
            prospects of the Company; and to the knowledge of such counsel no
            such proceedings are threatened or contemplated by governmental
            authorities or threatened by others.

                  (xv) To the knowledge of such counsel, there are no contracts
            or other documents which are required to be described in the
            Prospectus or filed as exhibits to the Registration Statement by the
            Securities Act or by the Rules and Regulations which have not been
            described in the Prospectus or filed as exhibits to the Registration
            Statement or incorporated therein by reference as permitted by the
            Rules and Regulations.

                  (xvi) To the knowledge of such counsel, no relationship,
            direct or indirect, exists between or among either of the
            Transaction Entities on the one hand, and the trustees, officers,
            shareholders, customers or suppliers of the Transaction Entities on
            the other hand, which is required to be described in the Prospectus
            which is not so described.

                  (xvii) To the knowledge of such counsel, each Transaction
            Entity is in compliance in all material respects with all presently
            applicable provisions of ERISA; to the knowledge of such counsel, no
            "reportable event" (as defined in ERISA) has occurred with respect
            to any "pension plan" (as defined in ERISA) for which either
            Transaction Entity would have any liability; to the knowledge of
            such counsel, neither Transaction Entity has incurred or expects to
            incur, liability under (i) Title IV of ERISA with respect to
            termination of, or withdrawal from, any "pension plan" or (ii)
            section 412 or 4971 of the Code; and, to the knowledge of such
            counsel, each "pension plan" for which either Transaction Entity
            would have any liability that is intended to be qualified under
            section 401(a) of the Code is so qualified in all material respects
            and nothing has occurred, whether by action or by failure to act,
            which would cause the loss of such qualification.

                  (xviii) No Transaction Entity or Property Affiliate is in
            violation of its charter, by-laws, certificate of limited
            partnership, agreement of limited partnership, or other similar
            organizational document, or, to the knowledge of such counsel, has a
            default been asserted in any respect, and it has not been asserted
            that any event has occurred which, with notice or lapse of time or
            both, would constitute such a default, in the due performance or
            observance of any term, covenant or condition contained in any
            material indenture, mortgage, deed of trust, loan agreement or other
            material agreement or instrument to which it is a party or by which
            it is bound or to which any of the Properties or any of its other
            properties or assets is subject.

                  (xix) No consent, approval, authorization or other order of,
            or registration or filing with, any court, regulatory body,
            administrative agency or other governmental body, agency, or
            official is required on the part of the Company (except as have been
            obtained under the Securities Act and the Exchange Act or such as
            may be required under state securities, real estate syndication or
            Blue Sky laws governing the purchase and distribution of the Notes)
            for the valid issuance and sale of the Notes to the Underwriters as
            contemplated by this Agreement.
<PAGE>   22
                  (xx) Neither Transaction Entity or their subsidiaries is an
            "investment company" within the meaning of such term under the
            Investment Company Act of 1940 and the rules and regulations of the
            Commission thereunder.

                  (xxi) The documents incorporated or deemed to be incorporated
            by reference in the Prospectus pursuant to Item 12 of Form S-3 under
            the Securities Act (other than the financial statements and related
            schedules and financial information and data included therein, as to
            which no opinion need be rendered), at the time they were filed with
            the Commission, complied and will comply as to form in all material
            respects with the requirements of the Exchange Act and the rules and
            regulations thereunder.

                  (xxii) The Registration Statement was declared effective under
            the Securities Act and the Indenture was duly qualified under the
            Trust Indenture Act as of the date and time specified in such
            opinion, the Prospectus was filed with the Commission pursuant to
            the subparagraph of Rule 424(b) of the Rules and Regulations
            specified in such opinion on the date specified therein and, to the
            knowledge of such counsel, no stop order suspending the
            effectiveness of the Registration Statement has been issued and, to
            the knowledge of such counsel, no proceeding for that purpose is
            pending or threatened by the Commission.

                  (xxiii) The Registration Statement and the Prospectus and any
            further amendments or supplements thereto made by the Company prior
            to the Delivery Date (other than the financial statements and
            related schedules and other financial information and data included
            therein, as to which such counsel need express no opinion) comply as
            to form in all material respects with the requirements of the
            Securities Act, the Rules and Regulations and the Trust Indenture
            Act and the rules and regulations thereunder, and the Indenture
            conforms in all material respects to the requirements of the Trust
            Indenture Act and the rules and regulations thereunder.

                  (xxiv) The Operating Partnership is classified as a
            partnership (and is not taxed as a corporation) for federal income
            tax purposes.

                  (xxv) The statements contained in the Prospectus under the
            captions "Risk Factors," "Description of Debt Securities,"
            "Description of Preferred Shares," "Description of Warrants,"
            "Description of Notes," and "Federal Income Tax Considerations with
            Respect to the Trust and the Operating Partnership" together with
            "Certain Federal Income Tax Considerations," insofar as those
            statements are descriptions of contracts, agreements or other legal
            documents, or they describe federal statutes, rules and regulations,
            and except to the extent such statements are statistics or
            calculations constitute a fair summary thereof.

                  In rendering such opinion, such counsel may (i) state that its
                  opinion is limited to matters governed by the Federal laws of
                  the United States of America, the laws of the Commonwealth of
                  Pennsylvania and the laws of the State of Maryland; (ii) as to
                  matters of Maryland law, state that its opinion is given
                  solely in reliance upon the opinion of Saul, Ewing, Remick &
                  Saul LLP; (iii) state that its opinion does not address (A)
                  Federal Reserve Board margin regulations; (B) Federal or state
                  antitrust
<PAGE>   23
                  and unfair competition laws and regulations; (C) Local Laws
                  (as defined in The Legal Opinion Accord of the ABA Section of
                  Business Law (1991); (D) compliance with fiduciary duty
                  requirements; (E) Federal and state racketeering laws and
                  regulations; (F) Federal and state health and safety laws and
                  regulations; and (G) Federal and state laws, regulations and
                  policies concerning (x) national and local emergency, (y)
                  possible judicial deference to acts of foreign states, and (z)
                  criminal and civil forfeiture laws; and (iv) in giving the
                  opinion referred to in subclause (B) in Section
                  7(d)(A)(vii)(A), state that such opinion with respect to the
                  enforceability of such documents may be limited by bankruptcy,
                  fraudulent conveyance, insolvency, reorganization, moratorium,
                  and other laws relating to or affecting creditors' rights
                  generally and by general equitable principles. Such counsel
                  shall also have furnished to the Underwriters a written
                  statement, addressed to the Underwriters and dated the
                  Delivery Date, in form and substance satisfactory to the
                  Underwriters, to the effect that (x) such counsel has acted as
                  counsel to the Company in connection with the preparation of
                  the Registration Statement and the Prospectus, and (y) based
                  on the foregoing, no facts have come to the attention of such
                  counsel which lead it to believe that the Registration
                  Statement, as of the Effective Date, contained any untrue
                  statement of a material fact or omitted to state a material
                  fact required to be stated therein or necessary in order to
                  make the statements therein not misleading, or that the
                  Prospectus contains any untrue statement of a material fact or
                  omits to state a material fact required to be stated therein
                  or necessary in order to make the statements therein, in light
                  of the circumstances under which they were made, not
                  misleading. The foregoing opinion and statement may be
                  qualified by a statement to the effect that such counsel does
                  not assume any responsibility for the accuracy, completeness
                  or fairness of the statements contained in the Registration
                  Statement or the Prospectus except to the extent of the
                  opinion contained in Section 7(d)(A)(xxii), and may state that
                  such counsel expresses no belief with respect to the financial
                  statements and notes thereto and other financial information
                  and data included or incorporated by reference in, or omitted
                  from, the Registration Statement or the Prospectus or the
                  Statement of Eligibility on Form T-1 of the Trustee.

                        (B) Saul, Ewing, Remick & Saul LLP shall have furnished
                  to the Underwriters its written opinion, as Maryland counsel
                  to the Company, addressed to the Underwriters and dated the
                  Delivery Date, in form and substance reasonably satisfactory
                  to the Underwriters, to the effect that:

                              (i) The Company has been duly formed and is
                        validly existing as a real estate investment trust in
                        good standing under and by virtue of the laws of the
                        State of Maryland, is in good standing with the State
                        Department of Assessments and Taxation of Maryland and
                        as a foreign trust or corporation in those jurisdictions
                        listed in such opinion, and has all trust power and
                        authority necessary to own or hold its properties and to
                        conduct the business in which it is engaged as described
                        in the Registration Statement and the Prospectus, and to
                        enter into and perform its obligations under this
                        Agreement.
<PAGE>   24
                              (ii) All of the issued shares of beneficial
                        interest of the Company have been duly and validly
                        authorized and issued, are fully paid and non-assessable
                        and conform in all material respects to the description
                        thereof contained in the Prospectus.

                              (iii) This Agreement has been duly and validly
                        authorized, executed and delivered by the Company, and
                        assuming due authorization, execution and delivery by
                        the Underwriters and the Operating Partnership, is a
                        valid and binding agreement of the Company.

                              (iv) To the knowledge of such counsel, the
                        execution, delivery and performance of this Agreement by
                        the Company and the consummation of the transactions
                        contemplated hereby will not conflict with or result in
                        any violation of the provisions of any statute or any
                        order, rule or regulation of any court or governmental
                        agency or body of the State of Maryland that has
                        jurisdiction over the Company or any of its properties
                        or assets.

                              (v) The execution, delivery and performance of
                        this Agreement by the Company and the consummation of
                        the transactions contemplated hereby will not conflict
                        with or result in any violation of the provisions of the
                        Declaration of Trust or by-laws of the Company.

                              (vi) To the knowledge of such counsel, there are
                        no legal or governmental proceedings pending to which
                        the Company is a party or of which any property or
                        assets of the Company is the subject which are not
                        disclosed in the Prospectus and which, if determined
                        adversely to the Company, might reasonably be expected
                        to have a material adverse effect on the consolidated
                        financial position, shareholders' equity, results of
                        operations, business or prospects of the Company; and to
                        the best knowledge of such counsel no such proceedings
                        are threatened or contemplated by governmental
                        authorities or threatened by others.

                  Such counsel shall state that Rogers & Wells LLP, counsel for
                  the Underwriters, may rely on its opinion.

                        (e) The Underwriters shall have received from Rogers &
                  Wells LLP, counsel for the Underwriters, such opinion or
                  opinions, dated the Delivery Date, with respect to the
                  issuance and sale of the Notes, the Registration Statement,
                  the Prospectus and other related matters as the Underwriters
                  may reasonably require, and the Company shall have furnished
                  to such counsel such documents as they reasonably request for
                  the purpose of enabling them to pass upon such matters.

                        (f) At the time of execution of this Agreement, the
                  Underwriters shall have received from Ernst & Young LLP a
                  letter, in form and substance satisfactory to the
                  Underwriters, addressed to the Underwriters and dated the date
                  hereof (i) confirming that they are independent public
                  accountants within the meaning of the Securities Act and are
                  in compliance with the applicable requirements relating to the
<PAGE>   25
                  qualification of accountants under Rule 2-01 of Regulation S-X
                  of the Commission, and (ii) stating, as of the date hereof
                  (or, with respect to matters involving changes or developments
                  since the respective dates as of which specified financial
                  information is given in, or incorporated by reference in, the
                  Prospectus, as of a date not more than five days prior to the
                  date hereof), the conclusions and findings of such firm with
                  respect to the financial information and other matters
                  ordinarily covered by accountants' "comfort letters" to
                  underwriters in connection with registered public offerings.

                        (g) With respect to the letter of Ernst & Young LLP
                  referred to in the preceding paragraph and delivered to the
                  Underwriters concurrently with the execution of this Agreement
                  (the "initial letter"), the Operating Partnership shall have
                  furnished to the Underwriters a letter (the "bring-down
                  letter") of such accountants, addressed to the Underwriters
                  and dated the Delivery Date (i) confirming that they are
                  independent public accountants within the meaning of the
                  Securities Act and are in compliance with the applicable
                  requirements relating to the qualification of accountants
                  under Rule 2-01 of Regulation S-X of the Commission, (ii)
                  stating, as of the date of the bring-down letter (or, with
                  respect to matters involving changes or developments since the
                  respective dates as of which specified financial information
                  is given in the Prospectus, as of a date not more than five
                  days prior to the date of the bring-down letter), the
                  conclusions and findings of such firm with respect to the
                  financial information and other matters covered by the initial
                  letter and (iii) confirming in all material respects the
                  conclusions and findings set forth in the initial letter.

                        (h) The Transaction Entities shall have furnished to the
                  Underwriters a certificate, dated the Delivery Date, of the
                  Chairman of the Board, Chief Executive Officer, President or a
                  Vice President of the Company and the chief financial officer
                  of the Company (in each case, for the Company and for the
                  Company as general partner of the Operating Partnership)
                  stating that:

                              (i) The representations, warranties and agreements
                        of the Transaction Entities in Section 1 are true and
                        correct as of the Delivery Date; the Transaction
                        Entities complied with all of their agreements contained
                        herein; and the conditions set forth in Sections 7(a)
                        and 7(i) have been fulfilled; and

                              (ii) They have carefully examined the Registration
                        Statement and the Prospectus and, in their opinion (A)
                        as of the applicable Effective Date, the Registration
                        Statement and Prospectus did not include any untrue
                        statement of a material fact and did not omit to state a
                        material fact required to be stated therein or necessary
                        to make the statements therein not misleading (with
                        respect to the Prospectus, in light of the circumstances
                        in which they were made), and (B) since the applicable
                        Effective Date no event has occurred which should have
                        been set forth in a supplement or amendment to the
                        Registration Statement or the Prospectus.
<PAGE>   26
                        (i) (i) None of the Transaction Entities or their
                  subsidiaries or any Property shall have sustained since the
                  date of the latest audited financial statements included in
                  the Prospectus any loss or interference with its business from
                  fire, explosion, flood or other calamity, whether or not
                  covered by insurance, or from any labor dispute or court or
                  governmental action, order or decree, otherwise than as set
                  forth or contemplated in the Prospectus or (ii) since such
                  date there shall not have been any change in the capital stock
                  or long-term debt of either Transaction Entity or any change,
                  or any development involving a prospective change, in or
                  affecting any Property Affiliate or Property or the general
                  affairs, management, financial position, shareholders' equity
                  or results of operations of either Transaction Entity,
                  otherwise than as set forth or contemplated in the Prospectus,
                  the effect of which, in any such case described in clause (i)
                  or (ii), is, in the judgment of the Underwriters, so material
                  and adverse as to make it impracticable or inadvisable to
                  proceed with the public offering or the delivery of the Notes
                  being delivered on the Delivery Date on the terms and in the
                  manner contemplated in the Prospectus.

                        (j) Subsequent to the execution and delivery of this
                  Agreement there shall not have occurred any of the following:
                  (i) trading in securities generally on the New York Stock
                  Exchange or the American Stock Exchange or in the
                  over-the-counter market, or trading in any securities of the
                  Company on any exchange or in the over-the-counter market,
                  shall have been suspended or minimum prices shall have been
                  established on any such exchange or such market by the
                  Commission, by such exchange or by any other regulatory body
                  or governmental authority having jurisdiction, (ii) a banking
                  moratorium shall have been declared by Federal or state
                  authorities, (iii) the United States shall have become engaged
                  in hostilities, there shall have been an escalation in
                  hostilities involving the United States or there shall have
                  been a declaration of a national emergency or war by the
                  United States or (iv) there shall have occurred such a
                  material adverse change in general economic, political or
                  financial conditions (or the effect of international
                  conditions on the financial markets in the United States shall
                  be such) as to make it, in the judgment of a majority in
                  interest of the several Underwriters, impracticable or
                  inadvisable to proceed with the public offering or delivery of
                  the Notes being delivered on the Delivery Date on the terms
                  and in the manner contemplated in the Prospectus.

                        (k) Subsequent to the execution and delivery of this
                  Agreement (i) no downgrading shall have occurred in the rating
                  accorded the Operating Partnership's debt securities by any
                  "nationally recognized statistical rating organization," as
                  that term is defined by the Commission for purposes of Rule
                  436(g)(2) of the Rules and Regulations and (ii) no such
                  organization shall have publicly announced that it has under
                  surveillance or review, with possible negative implications,
                  its rating of any of the Operating Partnership's debt
                  securities.

                        (l) The Transaction Entities shall not have failed at or
                  prior to the Delivery Date to have performed or complied with
                  any of their agreements herein contained and required to be
                  performed or complied with by them hereunder at or prior to
                  the Delivery Date.
<PAGE>   27
                        (m) On the Delivery Date, counsel for the Underwriters
                  shall have been furnished with such documents and opinions as
                  they may require for the purpose of enabling them to pass upon
                  the issuance and sale of the Notes 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 Transaction Entities in connection
                  with the issuance and sale of the Notes as herein contemplated
                  shall be satisfactory in form and substance to the
                  Underwriters and counsel for the Underwriters.

                        (n) The Operating Partnership shall have furnished or
                  caused to be furnished to the Underwriters such further
                  certificates and documents as the Underwriters shall have
                  reasonably requested.

            All opinions, letters, evidence and certificates mentioned above or
elsewhere in this Agreement shall be deemed to be in compliance with the
provisions hereof only if they are in form and substance reasonably satisfactory
to counsel for the Underwriters.

            Any certificate or document signed by any officer of the Transaction
Entities and delivered to the Underwriters, or to counsel for the Underwriters,
shall be deemed a representation and warranty by the Transaction Entities to
each Underwriter as to the statements made therein.

            8. Effective Date of Agreement. This Agreement shall become
effective: (i) upon the execution hereof by the parties hereto; or (ii) if, at
the time this Agreement is executed and delivered, it is necessary for the
Registration Statement or a post-effective amendment thereto to be declared
effective before the offering of the Notes may commence, when notification of
the effectiveness of the Registration Statement or such post-effective amendment
has been released by the Commission.

            9. Default by One or More of the Underwriters. If, on the Delivery
Date, any Underwriter defaults in the performance of its obligations under this
Agreement, the remaining non-defaulting Underwriters shall be obligated to
purchase the Notes which the defaulting Underwriter agreed but failed to
purchase on the Delivery Date in the respective proportions which the principal
amount of Notes set forth opposite the name of each remaining non-defaulting
Underwriter in Schedule I hereto bears to the total aggregate principal amount
of Notes set forth opposite the names of all the remaining non-defaulting
Underwriters in Schedule I hereto; provided, however, that the remaining
non-defaulting Underwriters shall not be obligated to purchase any of the Notes
on the Delivery Date if the total aggregate principal amount of Notes which the
defaulting Underwriter or Underwriters agreed but failed to purchase on such
date exceeds 9.09% of the total aggregate principal amount of Notes to be
purchased on the Delivery Date, and any remaining non-defaulting Underwriter
shall not be obligated to purchase more than 110% of the aggregate principal
amount of Notes which it agreed to purchase on the Delivery Date pursuant to the
terms of Section 2. If the foregoing maximums are exceeded, the remaining
non-defaulting Underwriters, or those other underwriters satisfactory to the
Underwriters who so agree, shall have the right, but shall not be obligated, to
purchase, in such proportion as may be agreed upon among them, all the Notes to
be purchased on the Delivery Date. If the remaining Underwriters or other
underwriters satisfactory to the Underwriters do not elect to purchase the Notes
which the defaulting Underwriter or
<PAGE>   28
Underwriters agreed but failed to purchase on the Delivery Date, this Agreement
shall terminate without liability on the part of any non-defaulting Underwriter
or the Transaction Entities, except that the Transaction Entities will continue
to be liable for the payment of expenses to the extent set forth in Sections 6
and 12. As used in this Agreement, the term "Underwriter" includes, for all
purposes of this Agreement unless the context requires otherwise, any party not
listed in Schedule I hereto who, pursuant to this Section 9, purchases Notes
which a defaulting Underwriter agreed but failed to purchase.

            Nothing contained herein shall relieve a defaulting Underwriter of
any liability it may have to the Transaction Entities for damages caused by its
default. If other underwriters are obligated or agree to purchase the Notes of a
defaulting or withdrawing Underwriter, either the Underwriters or the Company
may postpone the Delivery Date for up to seven full business days in order to
effect any changes that in the opinion of counsel for the Operating Partnership
or counsel for the Underwriters may be necessary in the Registration Statement,
the Prospectus or in any other document or arrangement.

            10. Indemnification and Contribution.

            (a) The Transaction Entities jointly and severally, shall indemnify
and hold harmless each Underwriter, its officers and employees and each person,
if any, who controls any Underwriter within the meaning of the Securities Act,
from and against any loss, claim, damage or liability, joint or several, or any
action in respect thereof (including, but not limited to, any loss, claim,
damage, liability or action relating to purchases and sales of Notes), to which
that Underwriter, officer, employee or controlling person may become subject,
under the Securities Act or otherwise, insofar as such loss, claim, damage,
liability or action arises out of, or is based upon, (i) any untrue statement or
alleged untrue statement of a material fact contained (A) in any Preliminary
Prospectus, the Registration Statement or the Prospectus or in any amendment or
supplement thereto or (B) in any blue sky application or other document prepared
or executed by the Operating Partnership (or based upon any written information
furnished by the Operating Partnership) specifically for the purpose of
qualifying any or all of the Notes under the securities laws of any state or
other jurisdiction (any such application, document or information being
hereinafter called a "Blue Sky Application"), (ii) the omission or alleged
omission to state in any Preliminary Prospectus, the Registration Statement or
the Prospectus, or in any amendment or supplement thereto, or in any Blue Sky
Application any material fact required to be stated therein or necessary to make
the statements therein not misleading (with respect to the Prospectus, in light
of the circumstances under which they were made), or (iii) any act or failure to
act or any alleged act or failure to act by any Underwriter in connection with,
or relating in any manner to, the Notes or the offering contemplated hereby, and
which is included as part of or referred to in any loss, claim, damage,
liability or action arising out of or based upon matters covered by clause (i)
or (ii) above (provided that the Transaction Entities shall not be liable under
this clause (iii) to the extent that it is determined in a final judgment by a
court of competent jurisdiction that such loss, claim, damage, liability or
action resulted directly from any such acts or failures to act undertaken or
omitted to be taken by such Underwriter through its gross negligence or willful
misconduct), and shall reimburse each Underwriter and each such officer,
employee or controlling person for any legal or other expenses reasonably
incurred by that Underwriter, officer, employee or controlling person in
connection with investigating or defending or preparing to defend against any
such loss,
<PAGE>   29
claim, damage, liability or action as such expenses are incurred; provided,
however, that the Transaction Entities shall not be liable in any such case to
the extent that any such loss, claim, damage, liability or action arises out of,
or is based upon, any untrue statement or alleged untrue statement or omission
or alleged omission made in any Preliminary Prospectus, the Registration
Statement or the Prospectus, or in any such amendment or supplement, or in any
Blue Sky Application, in reliance upon and in conformity with written
information concerning such Underwriter furnished to the Transaction Entities
through the Underwriters by or on behalf of any Underwriter specifically for
inclusion therein; provided further, that the Transaction Entities shall not be
liable in any such case to the extent that any such loss, claim, damage,
liability or action to or by any person arises out of, or is based upon, any
untrue statement or omission of material fact made in any prospectus, to the
extent that any such loss, claim, damage or liability or action to or by such
person results from the fact that (i) the Company had previously furnished
copies of the Prospectus to the Underwriters, (ii) delivery of the Prospectus
was required by the Securities Act to be made to such person, (iii) the untrue
statement or omission of a material fact contained in the prospectus was
corrected in the Prospectus, (iv) there was not sent or given to such person, at
or prior to the written confirmation of the sale of such securities to such
person, a copy of the Prospectus and (v) such correction would have cured the
defect giving rise to such loss, damage or liability. The foregoing indemnity
agreement is in addition to any liability which the Transaction Entities may
otherwise have to any Underwriter or to any officer, employee or controlling
person of that Underwriter.

            (b) Each Underwriter, severally and not jointly, shall indemnify and
hold harmless each Transaction Entity, its officers and employees, each of its
trustees, and each person, if any, who controls each Transaction Entity within
the meaning of the Securities Act, from and against any loss, claim, damage or
liability, joint or several, or any action in respect thereof, to which each
Transaction Entity or any such trustee, officer or controlling person may become
subject, under the Securities Act or otherwise, insofar as such loss, claim,
damage, liability or action arises out of, or is based upon, (i) any untrue
statement or alleged untrue statement of a material fact contained (A) in any
Preliminary Prospectus, the Registration Statement or the Prospectus or in any
amendment or supplement thereto, or (B) in any Blue Sky Application or (ii) the
omission or alleged omission to state in any Preliminary Prospectus, the
Registration Statement or the Prospectus, or in any amendment or supplement
thereto, or in any Blue Sky Application any material fact required to be stated
therein or necessary to make the statements therein not misleading, but in each
case only to the extent that the untrue statement or alleged untrue statement or
omission or alleged omission was made in reliance upon and in conformity with
written information concerning such Underwriter furnished to the Transaction
Entities through the Underwriters by or on behalf of that Underwriter
specifically for inclusion therein, and shall reimburse each Transaction Entity
and any such trustee, officer or controlling person for any legal or other
expenses reasonably incurred by each Transaction Entity or any such trustee,
officer or controlling person in connection with investigating or defending or
preparing to defend against any such loss, claim, damage, liability or action as
such expenses are incurred. The foregoing indemnity agreement is in addition to
any liability which any Underwriter may otherwise have to each Transaction
Entity or any such trustee, officer, employee or controlling person.

            (c) Promptly after receipt by an indemnified party under this
Section 10 of notice of any claim or the commencement of any action, the
indemnified party shall, if a claim in respect
<PAGE>   30
thereof is to be made against the indemnifying party under this Section 10,
notify the indemnifying party in writing of the claim or the commencement of
that action; provided, however, that the failure to notify the indemnifying
party shall not relieve it from any liability which it may have under this
Section 10 except to the extent it has been materially prejudiced by such
failure and, provided further, that the failure to notify the indemnifying party
shall not relieve it from any liability which it may have to an indemnified
party otherwise than under this Section 10. If any such claim or action shall be
brought against an indemnified party, and it shall notify the indemnifying party
thereof, the indemnifying party shall be entitled to participate therein and, to
the extent that it wishes, jointly with any other similarly notified
indemnifying party, to assume the defense thereof with counsel reasonably
satisfactory to the indemnified party. After notice from the indemnifying party
to the indemnified party of its election to assume the defense of such claim or
action, the indemnifying party shall not be liable to the indemnified party
under this Section 10 for any legal or other expenses subsequently incurred by
the indemnified party in connection with the defense thereof other than
reasonable costs of investigation; provided, however, that the indemnified party
shall have the right to employ its own counsel, with such counsel, in the case
of the Underwriters, to represent jointly the Underwriters and their respective
officers, employees and controlling persons who may be subject to liability
arising out of any claim in respect of which indemnity may be sought by the
Underwriters against the Transaction Entities under this Section 10 if, in the
reasonable judgment of the Underwriters, it is advisable for the Underwriters
and those officers, employees and controlling persons to be jointly represented
by separate counsel, and in that event the fees and expenses of such separate
counsel shall be paid by the Transaction Entities. No indemnifying party shall
(i) without the prior written consent of the indemnified parties (which consent
shall not be unreasonably withheld), settle or compromise or consent to the
entry of any judgment with respect to any pending or threatened claim, action,
suit or proceeding in respect of which indemnification or contribution may be
sought hereunder (whether or not the indemnified parties are actual or potential
parties to such claim or action) unless such settlement, compromise or consent
includes an unconditional release of each indemnified party from all liability
arising out of such claim, action, suit or proceeding, or (ii) be liable for any
settlement of any such action effected without its written consent (which
consent shall not be unreasonably withheld), but if settled with the consent of
the indemnifying party or if there be a final judgment of the plaintiff in any
such action, the indemnifying party agrees to indemnify and hold harmless any
indemnified party from and against any loss or liability by reason of such
settlement or judgment.

            (d) If the indemnification provided for in this Section 10 shall for
any reason be unavailable to or insufficient to hold harmless an indemnified
party under Section 10(a) or 10(c) in respect of any loss, claim, damage or
liability, or any action in respect thereof, referred to therein, then each
indemnifying party shall, in lieu of indemnifying such indemnified party,
contribute to the amount paid or payable by such indemnified party as a result
of such loss, claim, damage or liability, or action in respect thereof, (i) in
such proportion as shall be appropriate to reflect the relative benefits
received by the Transaction Entities on the one hand and the Underwriters on the
other from the offering of the Notes or (ii) if the allocation provided by
clause (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 (i)
above but also the relative fault of the Transaction Entities on the one hand
and the Underwriters on the other with respect to the statements or omissions
which resulted in such loss, claim, damage or liability, or action in respect
thereof, as well as any other relevant equitable considerations. The relative
benefits received by the Transaction Entities on the
<PAGE>   31
one hand and the Underwriters on the other with respect to such offering shall
be deemed to be in the same proportion as the total net proceeds from the
offering of the Notes purchased under this Agreement (before deducting expenses)
received by the Transaction Entities, on the one hand, and the total
underwriting discounts and commissions received by the Underwriters with respect
to the Notes purchased under this Agreement, on the other hand, bear to the
total gross proceeds from the offering of the Notes under this Agreement, in
each case as set forth in the table on the cover page of the Prospectus. The
relative fault shall be determined by reference to whether the untrue or alleged
untrue statement of a material fact or omission or alleged omission to state a
material fact relates to information supplied by the Transaction Entities or the
Underwriters, the intent of the parties and their relative knowledge, access to
information and opportunity to correct or prevent such statement or omission.
The Transaction Entities and the Underwriters agree that it would not be just
and equitable if contributions pursuant to this Section were to be 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 into
account the equitable considerations referred to herein. The amount paid or
payable by an indemnified party as a result of the loss, claim, damage or
liability, or action in respect thereof, referred to above in this Section shall
be deemed to include, for purposes of this Section 10(d), any legal or other
expenses reasonably incurred by such indemnified party in connection with
investigating or defending any such action or claim. Notwithstanding the
provisions of this Section 10(d), no Underwriter shall be required to contribute
any amount in excess of the amount by which the total price at which the Notes
underwritten by it and distributed to the public was offered to the public
exceeds the amount of any damages which such Underwriter has otherwise paid or
become liable to pay by reason of any 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 Securities Act) shall be entitled to
contribution from any person who was not guilty of such fraudulent
misrepresentation. The Underwriters' obligations to contribute as provided in
this Section 10(d) are several in proportion to their respective underwriting
obligations and not joint.

            (e) The Underwriters severally confirm and each Transaction Entity
acknowledges that the statements with respect to the public offering of the
Notes by the Underwriters set forth on the cover page of, the concession and
reallowance figures appearing under the caption "Underwriting" and, pursuant to
Item 508 of Regulation S-K of the Securities Act, paragraph 3 and the last six
paragraphs of the section captioned "Plan of Distribution" in, the Preliminary
Prospectus and the comparable material in the Prospectus are correct and
constitute the only information concerning such Underwriters furnished in
writing to the Transaction Entities by or on behalf of the Underwriters
specifically for inclusion in the Registration Statement, the Preliminary
Prospectus and the Prospectus.

            11. Termination. The obligations of the Underwriters hereunder may
be terminated by the Underwriters by notice given to and received by the
Operating Partnership prior to delivery of and payment for the Notes if, prior
to that time, any of the events described in Sections 7(i), 7(j) or 7(l), shall
have occurred or if the Underwriters shall decline to purchase the Notes for any
reason permitted under this Agreement.

            12. Reimbursement of Underwriters' Expenses. If the Operating
Partnership shall fail to tender the Notes for delivery to the Underwriters by
reason of any failure, refusal or inability
<PAGE>   32
on the part of the Transaction Entities to perform any agreement on their part
to be performed, or because any other condition of the Underwriters' obligations
hereunder required to be fulfilled by the Transaction Entities is not fulfilled,
the Transaction Entities will reimburse the Underwriters for all reasonable
out-of-pocket expenses (including fees and disbursements of counsel) incurred by
the Underwriters in connection with this Agreement and the proposed purchase of
the Notes, and upon demand the Transaction Entities shall pay the full amount
thereof to the Underwriters. If this Agreement is terminated pursuant to Section
9 by reason of the default of one or more Underwriters, the Transaction Entities
shall not be obligated to reimburse any defaulting Underwriter on account of
those expenses.

            13. Notices, etc. All statements, requests, notices and agreements
hereunder shall be in writing, and:

                  (a) if to the Underwriters, shall be delivered or sent by
            mail, telex or facsimile transmission to Lehman Brothers Inc., Three
            World Financial Center, New York, New York 10285, Attention:
            Syndicate Department (Fax: 212-526-6588), with a copy, in the case
            of any notice pursuant to Section 10(c), to the Director of
            Litigation, Office of the General Counsel, Lehman Brothers Inc., 3
            World Financial Center, 10th Floor, New York, NY 10285;

                  (b) if to the Transaction Entities shall be delivered or sent
            by mail, telex or facsimile transmission to the Company, 65 Valley
            Stream Parkway, Malvern, PA 19355, Attention: General Counsel (Fax:
            610-644-2175);

provided, however, that any notice to an Underwriter pursuant to Section 10(c)
shall be delivered or sent by mail, telex or facsimile transmission to such
Underwriter at its address set forth in its acceptance telex to the
Underwriters, which address will be supplied to any other party hereto by the
Underwriters upon request. Any such statements, requests, notices or agreements
shall take effect at the time of receipt thereof. The Transaction Entities shall
be entitled to act and rely upon any request, consent, notice or agreement given
or made on behalf of the Underwriters by Lehman Brothers Inc.

            14. Persons Entitled to Benefit of Agreement. This Agreement shall
inure to the benefit of and be binding upon the Underwriters, the Transaction
Entities and their respective personal representatives and successors. This
Agreement and the terms and provisions hereof are for the sole benefit of only
those persons, except that (A) the representations, warranties, indemnities and
agreements of the Transaction Entities contained in this Agreement shall also be
deemed to be for the benefit of the person or persons, if any, who control any
Underwriter within the meaning of Section 15 of the Securities Act and (B) the
indemnity agreement of the Underwriters contained in Section 10(b) of this
Agreement shall be deemed to be for the benefit of trustees of the Company,
officers of the Company who have signed the Registration Statement and any
person controlling the Transaction Entities within the meaning of section 15 of
the Securities Act. Nothing in this Agreement is intended or shall be construed
to give any person, other than the persons referred to in this Section 14, any
legal or equitable right, remedy or claim under or in respect of this Agreement
or any provision contained herein.
<PAGE>   33
            15. Survival. The respective indemnities, representations,
warranties and agreements of the Transaction Entities and the Underwriters
contained in this Agreement or made by or on behalf on them, respectively,
pursuant to this Agreement, shall survive the delivery of and payment for the
Notes and shall remain in full force and effect, regardless of any investigation
made by or on behalf of any of them or any person controlling any of them.

            16. Definition of the Terms "Business Day" and "Subsidiary". For
purposes of this Agreement, (a) "business day" means any day on which the New
York Stock Exchange, Inc. is open for trading and (b) "subsidiary" has the
meaning set forth in Rule 405 of the Rules and Regulations.

            17. Governing Law. This Agreement shall be governed by and construed
in accordance with the laws of New York.

            18. Counterparts. This Agreement may be executed in one or more
counterparts and, if executed in more than one counterpart, the executed
counterparts shall each be deemed to be an original but all such counterparts
shall together constitute one and the same instrument.

            19. Headings. The headings herein are inserted for convenience of
reference only and are not intended to be part of, or to affect the meaning or
interpretation of, this Agreement.
<PAGE>   34
            If the foregoing correctly sets forth the agreement between the
Company and the Underwriters, please indicate your acceptance in the space
provided for that purpose below.


                                    Very truly yours,

                                    LIBERTY PROPERTY TRUST



                                    By: /s/ Willard G. Rouse III
                                        -------------------------------
                                        Name:  Willard G. Rouse III
                                        Title: Chairman of the Board and Chief
                                               Executive Officer



                                    LIBERTY PROPERTY LIMITED PARTNERSHIP

                                    By: Liberty Property Trust, 
                                          its general partner


                                        By: /s/ Willard G. Rouse III
                                            -------------------------------
                                            Name: Willard G. Rouse III
                                            Title: Chairman of the Board
                                                   and Chief Executive Officer



Accepted:


LEHMAN BROTHERS INC.



By: /s/ James Merlie
    -------------------------------
    Authorized Representative

For itself and on behalf of
the Underwriters
<PAGE>   35
                                   SCHEDULE I



<TABLE>
<CAPTION>
       UNDERWRITERS                                                 PRINCIPAL 
                                                                 AMOUNT OF NOTES
<S>                                                              <C>         
Lehman Brothers Inc.                                              $115,000,000
Banc One Capital Markets, Inc.                                      22,500,000
Donaldson, Lufkin & Jenrette Securities Corporation                 22,500,000
Goldman, Sachs & Co.                                                22,500,000
J.P. Morgan Securities Inc.                                         22,500,000
Salomon Smith Barney Inc.                                           22,500,000
Warburg Dillon Read LLC                                             22,500,000
                                                                  $250,000,000
</TABLE>
                                                                  
<PAGE>   36
                                   SCHEDULE II


Senior Notes Due 2009

<TABLE>
<S>                                                  <C>            
Principal Amount:                                    $250,000,000.00
Coupon:                                              7 3/4%
Settlement Date:                                     April 20, 1999

Price to Public:                                     99.230%
Price to Public:                                     $248,075,000

Underwriting Discount:                               0.650%
Underwriting Discount:                               $1,625,000

Price to Company:                                    98.580%
Proceeds to the Company (before expenses):           $246,450,000

Maturity Date:                                       April 15, 2009
</TABLE>

<PAGE>   1
                                                                    Exhibit 12.1


                EXHIBIT 12.1 - STATEMENT RE: COMPUTATION OF RATIO
                      OF EARNINGS TO COMBINED FIXED CHARGES
                     AND RATIO OF EARNINGS TO FIXED CHARGES

          LIBERTY PROPERTY TRUST/LIBERTY PROPERTY LIMITED PARTNERSHIP

<TABLE>
<CAPTION>
                                                                                                                           
                                                             YEAR ENDED            YEAR ENDED            YEAR ENDED        
                                                          DECEMBER 31, 1998     DECEMBER 31, 1997     DECEMBER 31, 1996    
                                                               --------             --------              --------         
                                                                             (Dollars in Thousands)
<S>                                                       <C>                   <C>                   <C>                  
Earnings before fixed charges:                                                                                             
Income (loss) before extraordinary item                        $116,677             $ 66,050              $ 37,631         
Add: Interest expense                                            74,155               46,521                33,967         
     Depreciation expense on cap'd                                                                                         
      interest                                                    1,001                  650                   502         
     Amortization of deferred                                                                                              
      financing costs, net                                        4,462                7,367                 4,561         
                                                               --------             --------              --------         
Earnings before fixed charges                                  $196,295             $120,588              $ 76,661         
                                                               ========             ========              ========         
Fixed charges:                                                                                                             
Interest expense                                                 74,155               46,521                33,967         
Amortization of deferred financing charges                        4,462                4,448                 4,561         
Capitalized interest                                             16,317               11,802                 7,708         
Preferred unit distributions                                     11,000                4,247                    --         
                                                               --------             --------              --------         
Fixed charges                                                  $105,934             $ 67,018              $ 46,236         
                                                               ========             ========              ========         
Ratio of earnings to combined fixed charges                        1.85                 1.80                  1.66         
                                                               ========             ========              ========         
Ratio of earnings to fixed charges                                 2.07                 1.92                  1.66         
                                                               ========             ========              ========         
<CAPTION>                                                 
                                                                                   PERIOD FROM    
                                                              YEAR ENDED         JUNE 23, 1994 TO 
                                                           DECEMBER 31, 1995     DECEMBER 31, 1994
                                                               --------              --------     
                                                                  (Dollars in Thousands)
<S>                                                        <C>                   <C>              
Earnings before fixed charges:                                                                    
Income (loss) before extraordinary item                        $ 22,309              $ 10,868     
Add: Interest expense                                            32,819                11,326     
     Depreciation expense on cap'd                                                                
      interest                                                      450                   200     
     Amortization of deferred                                                                     
      financing costs, net                                        4,869                 1,250     
                                                               --------              --------     
Earnings before fixed charges                                  $ 60,447              $ 23,644     
                                                               ========              ========     
Fixed charges:                                                                                    
Interest expense                                                 32,819                11,326     
Amortization of deferred financing charges                        4,869                 1,250     
Capitalized interest                                              3,475                   190     
Preferred unit distributions                                         --                    --     
                                                               --------              --------     
Fixed charges                                                  $ 41,163              $ 12,766     
                                                               ========              ========     
Ratio of earnings to combined fixed charges                        1.47                  1.85     
                                                               ========              ========     
Ratio of earnings to fixed charges                                 1.47                  1.85
                                                               ========              ========

</TABLE>


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