8-K

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

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) October 6, 2005

WASHINGTON REAL ESTATE INVESTMENT TRUST

(Exact name of registrant as specified in its charter)

Maryland	1-6622	53-0261100
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification Number)

6110 Executive Boulevard, Suite 800, Rockville, Maryland	20852
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code (301) 984-9400

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 2.03 Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.

On October 6, 2005, Washington Real Estate Investment Trust (“WRIT”) completed the re-opening of its series of 5.35% senior unsecured notes due May 1, 2015, originally issued on April 26, 2005, and the sale of an additional $100,000,000 aggregate principal amount of its 5.35% senior unsecured notes due May 1, 2015, at a price of 98.942% of their principal amount (the “Notes”). The sale of the Notes were pursuant to an Underwriting Agreement and Terms Agreement, each dated October 3, 2005, between WRIT, Credit Suisse First Boston LLC, J.P. Morgan Securities Inc. and Wells Fargo Securities, LLC. Upon the closing of the additional issuance, $150,000,000 aggregate principal amount of WRIT’s 5.35% senior unsecured notes due May 1, 2015 were outstanding.

The Notes were issued on October 6, 2005 pursuant to a Registration Statement on Form S-3 (No. 333-114410), filed with the Securities and Exchange Commission (the “SEC”) on April 12, 2004, and declared effective on April 29, 2004. A Prospectus Supplement dated October 3, 2005 relating to the Notes (the “Prospectus Supplement”) and supplementing the Prospectus dated April 29, 2004 (the “Prospectus”) was filed with the SEC on October 4, 2005 pursuant to Rule 424(b)(5) under the Securities Act of 1933, as amended.

Interest on the Notes is payable semiannually in arrears on May 1 and November 1 of each year, beginning November 1, 2005. Interest on the Notes will accrue from April 26, 2005. The Notes will rank equally with all other unsecured senior indebtedness of WRIT. The Notes may be redeemed in whole or in part at any time before maturity at the redemption prices described in the Prospectus Supplement and will not be subject to any sinking fund. Descriptions of the terms of the Notes are included under the caption “Description of the Notes” in the Prospectus Supplement and under the caption “Description of Debt Securities” in the Prospectus. The form of the Notes and the Officers’ Certificate establishing the terms of the Notes are attached to this Current Report on Form 8-K as Exhibits 4.1 and 4.2, respectively.

Item 9.01. Financial Statements and Exhibits.

(c) Exhibits

The following exhibits are filed with this report on Form 8-K:

Exhibit No.	Description
4.1	Form of 5.35% Senior Notes due May 1, 2015
4.2	Officers’ Certificate establishing the terms of the Notes, dated October 3, 2005
5.1	Opinion of Arent Fox PLLC
23.1	Consent of Arent Fox PLLC (included in Exhibit 5.1)

SIGNATURES

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

WASHINGTON REAL ESTATE INVESTMENT TRUST
(Registrant)
By:	/s/ Sara Grootwassink
	(Signature)
	Sara Grootwassink
	Chief Financial Officer

October 6, 2005

Exhibit Index

Exhibit Number	Description
4.1	Form of 5.35% Senior Notes due May 1, 2015
4.2	Officers’ Certificate establishing the terms of the Notes, dated October 3, 2005
5.1	Opinion of Arent Fox PLLC
23.1	Consent of Arent Fox PLLC (included in Exhibit 5.1)

EX-4.1

Exhibit 4.1

Unless this certificate is presented by an authorized representative of The Depository Trust Company, a New York corporation (“DTC”), to the Trust (as defined below) or its agent for registration of transfer, exchange, or payment, and any certificate issued is registered in the name of Cede & Co. or in such other name as is requested by an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an authorized representative of DTC), ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch as the registered owner hereof, Cede & Co., has an interest herein.

REGISTERED	PRINCIPAL AMOUNT: $100,000,000
No.: 2

CUSIP NUMBER: 939653 AG6

WASHINGTON REAL ESTATE INVESTMENT TRUST

5.35% SENIOR NOTE DUE MAY 1, 2015

WASHINGTON REAL ESTATE INVESTMENT TRUST, a Maryland real estate investment trust (hereinafter called the “Trust,” which term shall include any successor trust or corporation under the Indenture hereinafter referred to), for value received, hereby promises to pay to Cede & Co., or registered assigns, upon presentation, the principal sum of ONE HUNDRED MILLION DOLLARS ($100,000,000) on May 1, 2015, and to pay interest on the outstanding principal amount thereon from April 26, 2005, or from the most recent Interest Payment Date to which interest has been paid or duly provided for, semi-annually in arrears on May 1 and November 1 in each year, commencing November 1, 2005, at the rate of 5.35% per annum, until the entire principal amount hereof is paid or made available for payment. The interest so payable, and punctually paid or duly provided for on any Interest Payment Date will, as provided in the Indenture, be paid to the Person in whose name this Note (or one or more Predecessor Notes) is registered at the close of business on the Regular Record Date for such interest which shall be 15 calendar days (whether or not a Business Day) next preceding such Interest Payment Date. Any such interest not so punctually paid or duly provided for shall forthwith cease to be payable to the Holder on such Regular Record Date, and may either be paid to the Person in whose name this Note (or one or more Predecessor Notes) is registered at the close of business on a Special Record Date for the payment of such Defaulted Interest to be fixed by the Trustee, notice whereof shall be given to Holders of Notes of this series not more than 15 days and not less than 10 days prior to such Special Record Date, or may be paid at any time in any other lawful manner not inconsistent with the requirements of any securities exchange on which the Notes may be listed, and upon such notice as may be required by such exchange, all as more fully provided in the Indenture. Payment of the principal of, Make Whole Amount, if any, on, and interest on this Note will be made at the office or agency of the Trust maintained for that purpose in the City of New York, State of New York, or elsewhere as provided in the Indenture, in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debts; provided, however, that at the option of the Trust payment of interest may be made by (i) check mailed to the address of the Person entitled thereto

as such address shall appear in the Security Register kept for the Notes pursuant to Section 305 of the Indenture (the “Note Register”) or (ii) transfer to an account of the Person entitled thereto located inside the United States.

This Note is one of a duly authorized issue of securities of the Trust (herein called the “Notes”), issued and to be issued in one or more series under an Indenture, dated as of August 1, 1996 (herein called the “Indenture”), between the Trust and J.P. Morgan Trust Company, National Association (successor to The First National Bank of Chicago) (herein called the “Trustee,” which term includes any successor trustee under the Indenture with respect to the Notes), to which Indenture and all indentures supplemental thereto reference is hereby made for a statement of the respective rights, limitations of rights, duties and immunities thereunder of the Trust, the Trustee and the Holders of the Notes and of the terms upon which the Notes are, and are to be, authenticated and delivered. This Note is one of the series designated as the “5.35% Senior Notes due May 1, 2015”, limited in aggregate principal amount to $150,000,000.

The Notes may be redeemed at any time at the option of the Trust, in whole or in part, upon notice of not more than 60 nor less than 30 days prior to the Redemption Date, at a redemption price equal to the sum of (i) the principal amount of the Notes being redeemed plus accrued interest thereon to the Redemption Date and (ii) the Make-Whole Amount, if any, with respect to such Notes.

The following definitions apply with respect to any redemption or accelerated payment of the Notes:

“Make-Whole Amount” means, in connection with any optional redemption or accelerated payment of any Notes, the excess, if any, of (a) the aggregate present value as of the date of such redemption or accelerated payment of each dollar of principal being redeemed or paid and the amount of interest (exclusive of interest accrued to the date of redemption or accelerated payment) that would have been payable in respect of each such dollar if such redemption or accelerated payment had not been made, determined by discounting, on a semi-annual basis, such principal and interest at the Reinvestment Rate (determined on the third Business Day preceding the date such notice of redemption is given or declaration of acceleration is made) from the respective dates on which such principal and interest would have been payable if such redemption or accelerated payment had not been made, over (b) the aggregate principal amount of the Notes being redeemed or paid.

“Reinvestment Rate” means 0.20% plus the arithmetic mean of the yields under the heading “Week Ending” published in the most recent Statistical Release under the caption “Treasury Constant Maturities” for the maturity (rounded to the nearest month) corresponding to the remaining life to maturity of the Note, as of the payment date of the principal of the Notes being redeemed or paid. If no maturity exactly corresponds to such maturity, yields for the two published maturities most closely corresponding to such maturity shall be calculated pursuant to the immediately preceding sentence and the Reinvestment Rate shall be interpolated or extrapolated from such yields on a straight-line basis, rounding in each of such relevant periods to the nearest month. For the purposes of calculating the Reinvestment Rate, the most recent Statistical Release published prior to the date of determination of the Make-Whole Amount shall be used.

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“Statistical Release” means the statistical release designated “H.15(519)” or any successor publication which is published weekly by the Federal Reserve System and which establishes yields on actively traded United States government securities adjusted to constant maturities, or, if such statistical release is not published at the time of any determination of the Make-Whole Amount, then such other reasonably comparable index which shall be designated by the Trust.

The Indenture contains provisions for defeasance at any time of (a) the entire indebtedness of the Trust on this Note and (b) certain restrictive covenants and the related defaults and Events of Default applicable to the Trust, in each case, upon compliance by the Trust with certain conditions set forth in the Indenture, which provisions apply to this Note.

If an Event of Default with respect to the Notes of this series shall occur and be continuing, the principal of, and the Make-Whole Amount, if any, on, the Notes of this series may be declared due and payable in the manner and with the effect provided in the Indenture.

As provided in and subject to the provisions of the Indenture, the Holder of this Note shall not have the right to institute any proceeding with respect to the Indenture or for the appointment of a receiver or trustee or for any other remedy thereunder, unless such Holder shall have previously given the Trustee written notice of a continuing Event of Default with respect to the Notes of this series, the Holders of not less than 25% in principal amount of the Notes of this series at the time Outstanding shall have made written request to the Trustee to institute proceedings in respect of such Event of Default as Trustee and offered the Trustee reasonable indemnity and the Trustee shall not have received from the Holders of a majority in principal amount of the Notes of this series at the time Outstanding a direction inconsistent with such request, and shall have failed to institute any such proceeding, for 60 days after receipt of such notice, request and offer of indemnity. The foregoing shall not apply to any suit instituted by the Holder of this Note for the enforcement of any payment of principal hereof or any interest on or after the respective due dates expressed herein.

The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations of the Trust and the rights of the Holders of the Notes under the Indenture at any time by the Trust and the Trustee with the consent of the Holders of not less than a majority in principal amount of the Outstanding Notes. The Indenture also contains provisions permitting the Holders of specified percentages in principal amount of the Notes at the time Outstanding, on behalf of the Holders of all Notes, to waive compliance by the Trust with certain provisions of the Indenture and certain past defaults under the Indenture and their consequences. Any such consent or waiver by the Holder of this Note shall be conclusive and binding upon such Holder and upon all future Holders of this Note and of any Note issued upon the registration of transfer hereof or in exchange herefor or in lieu hereof, whether or not notation of such consent or waiver is made upon this Note.

No reference herein to the Indenture and no provision of this Note or of the Indenture

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shall alter or impair the obligation of the Trust, which is absolute and unconditional, to pay the principal of, Make-Whole Amount, if any, on, and interest on this Note at the times, place and rate, and in the coin or currency, herein prescribed.

As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Note is registrable in the Note Register, upon surrender of this Note for registration of transfer at the office or agency of the Trust in any Place of Payment where the principal of, Make-Whole Amount, if any, on, and interest on this Note are payable, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Trust and the Security Registrar for the Notes (the “Note Registrar”) duly executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Notes of this series, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.

The Notes of this series are issuable only in registered form without coupons in denominations of $1,000 and any integral multiple thereof. As provided in the Indenture and subject to certain limitations therein set forth, Notes of this series are exchangeable for a like aggregate principal amount of Notes of this series of a different authorized denomination, as requested by the Holder surrendering the same.

No service charge shall be made for any such registration of transfer or exchange, but the Trust may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection therewith.

Prior to due presentment of this Note for registration of transfer, the Trust, the Trustee and any agent of the Trust or the Trustee may treat the Person in whose name this Note is registered as the owner hereof for all purposes, whether or not this Note be overdue, and neither the Trust, the Trustee nor any such agent shall be affected by notice to the contrary.

The obligations of the Trust under the Indenture and this Note and all documents delivered in the name of the Trust in connection herewith and therewith do not and shall not constitute personal obligations of the trustees, officers, employees, agents or shareholders of the Trust or any of them, and shall not involve any claim against or personal liability on the part of any of them, and all persons including the Trustee shall look solely to the assets of the Trust for the payment of any claim thereunder or for the performance thereof and shall not seek recourse against such trustees, officers, employees, agents or shareholders of the Trust or any of them or any of their personal assets for such satisfaction. The performance of the obligations of the Trust under the Indenture and this Note and all documents delivered in the name of the Trust in connection therewith shall not be deemed a waiver of any rights or powers of the Trust, trustees or shareholders under the Trust’s Declaration of Trust.

All terms used in this Note which are defined in the Indenture shall have the meanings assigned to them in the Indenture.

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THE INDENTURE AND THE NOTES, INCLUDING THIS NOTE, SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF NEW YORK.

Pursuant to a recommendation promulgated by the Committee on Uniform Security Identification Procedures, the Trust has caused “CUSIP” numbers to be printed on the Notes as a convenience to the Holders of the Notes. No representation is made as to the correctness or accuracy of such CUSIP numbers as printed on the Notes, and reliance may be placed only on the other identification numbers printed hereon.

Unless the certificate of authentication hereon has been executed by or on behalf of the Trustee by manual signature, this Note shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

IN WITNESS WHEREOF, the Trust has caused this instrument to be duly executed this October 6, 2005.

WASHINGTON REAL ESTATE INVESTMENT TRUST
By:
Name:	Edmund B. Cronin, Jr.
Title:	Chairman, President and Chief Executive Officer

Attest:

By:
Name:	Laura M. Franklin
Title:	Corporate Secretary

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TRUSTEE’S CERTIFICATE OF AUTHENTICATION:

This is one of the Notes of the series designated “5.35% Senior Notes due May 1, 2015” pursuant to the within-mentioned Indenture.

J.P. MORGAN TRUST COMPANY, NATIONAL ASSOCIATION

as Trustee

By:

Authorized Signatory

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ASSIGNMENT FORM

FOR VALUE RECEIVED, the undersigned hereby

sells, assigns and transfers unto

PLEASE INSERT SOCIAL

SECURITY OR OTHER IDENTIFYING ___________________________________

NUMBER OF ASSIGNEE

_________________________________________________________________________________________________________________

(Please Print or Typewrite Name and Address, including Zip Code, of Assignee)

the within Note of Washington Real Investment Trust and                                      hereby does irrevocably constitute and appoint

_________________________________________________________________________________________________________________

Attorney to transfer said Note on the books of the within-named Trust with full power of substitution in the premises.

Dated:                                  

Signature: ____________________________________________________

NOTICE: The signature to this assignment must correspond with the name as it appears on the first page of the within Note in every particular, without alteration or enlargement or any change whatever.

Signature Guaranteed: ____________________________________________________

NOTICE: Signatures) must be guaranteed by an “eligible guarantor institution” that is a member or participant in a “signature guarantee program” (e.g., the Securities Transfer Agents Medallion Program, the Stock Exchange Medallion Program or the New York Stock Exchange, Inc. Medallion Signature Program).

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EX-4.2

Exhibit 4.2

OFFICERS’ CERTIFICATE ESTABLISHING

THE TERMS OF THE ADDITIONAL NOTES

Pursuant to Section 301 of the Indenture

Pursuant to (i) resolutions adopted by the Board of Trustees of Washington Real Estate Investment Trust (the “Trust”) dated as of September 30, 2005 and (ii) Section 301 of the Indenture, dated as of August 1, 1996, between the Trust and J.P. Morgan Trust Company, National Association (successor to The First National Bank of Chicago), as Trustee (the “Indenture”), the Trust shall reopen the series of notes titled “5.35% Senior Notes due May 1, 2015” originally issued by the Trust on April 26, 2005 in the aggregate principal amount of $50,000,000 (the “Existing Notes”) and issue $100,000,000 principal amount of additional notes as a part of the same series of Securities as the Existing Notes (the “Additional Notes”) in accordance with the terms herein. Accordingly, we, Edmund B. Cronin, Jr., a trustee and the Chairman, President and Chief Executive Officer of the Trust, and Sara L. Grootwassink, Chief Financial Officer of the Trust, do hereby deliver this Certificate establishing the following terms of the Additional Notes and do hereby certify that (terms used in this Certificate and not defined herein having the same definitions as in the Indenture):

(1) The Additional Notes shall be part of the same series of Securities as the Existing Notes. The Additional Notes shall collectively, with the Existing Notes, constitute a single series of debt securities under the Indenture. All terms of the Additional Notes are intended to be the same as, and pari passu with, the terms of the Existing Notes.

(2) The aggregate principal amount of the Existing Notes and the Additional Notes that may be authenticated and delivered under the Indenture (except for Notes authenticated and delivered upon registration of transfer of, or in exchange for, or in lieu of, other Notes pursuant to Sections 304, 305, 306, 906, 1107 or 1305 of the Indenture) shall be $150,000,000.

(3) The Additional Notes shall mature on May 1, 2015, subject to prior redemption at the option of the Trust as described in paragraph (9).

(4) The rate at which the Additional Notes shall bear interest shall be 5.35% per annum. The date from which such interest shall accrue shall be April 26, 2005; the Interest Payment Dates on which such interest will be payable shall be May 1 and November 1 in each year, beginning November 1, 2005, and on the Maturity Date; the Regular Record Dates for the interest payable on the Additional Notes on any Interest Payment Date shall be 15 calendar days prior to the related Interest Payment Date regardless of whether such day is a Business Day; the interest on the Additional Notes shall be computed on the basis of a 360-day year consisting of twelve 30-day months.

(5) The Additional Notes shall be issuable in denominations of $1,000 and integral multiples thereof.

(6) The place where the principal of (and Make-Whole Amount, if any) and interest on the Additional Notes shall be payable and the Additional Notes may be surrendered for registration of transfer or exchange and where notices or demands to or upon the Trust in respect of the Additional Notes and the Indenture may be served shall be the Corporate Trust Office of J.P. Morgan Trust Company, National Association, at 4 New York Plaza, 1st Floor, New York, New York 10004.

(7) The entire outstanding principal amount of the Additional Notes (and Make-Whole Amount, if any) shall be payable upon declaration of acceleration of the maturity thereof pursuant to Section 502 of the Indenture.

(8) Payment of the principal of (and Make-Whole Amount, any) and interest on the Additional Notes shall be payable in Dollars and the Additional Notes shall be denominated in Dollars.

(9) The Additional Notes, as well as the Existing Notes, shall be redeemable at any time at the option of the Trust, in whole or in part, at a Redemption Price, payable in Dollars, equal to the sum of (i) the principal amount of the Additional Notes being redeemed plus accrued interest thereon to the redemption date and (ii) the Make-Whole Amount, if any, with respect to such Additional Notes.

“Make-Whole Amount” shall mean, in connection with any optional redemption or accelerated payment of any of the Additional Notes, the excess, if any, of (a) the aggregate present value as of the date of such redemption or accelerated payment of each dollar of principal being redeemed or paid and the amount of interest (exclusive of interest accrued to the date of redemption or accelerated payment) that would have been payable in respect of each such dollar if such redemption or accelerated payment had not been made, determined by discounting, on a semi-annual basis, such principal and interest at the Reinvestment Rate (determined on the third Business Day preceding the date such notice of redemption is given or declaration of acceleration is made) from the respective dates on which such principal and interest would have been payable if such redemption or accelerated payment had not been made, over (b) the aggregate principal amount of the Additional Notes being redeemed or paid.

“Reinvestment Rate” shall mean with respect to the Additional Notes, 0.20%, plus, in each case, the arithmetic mean of the yields under the heading “Week Ending” published in the most recent Statistical Release under the caption “Treasury Constant Maturities” for the maturity (rounded to the nearest month) corresponding to the remaining life to maturity, as of the payment date of the principal of the Additional Notes being redeemed or paid. If no maturity exactly corresponds to such maturity, yields for the two published maturities most closely corresponding to such maturity shall be calculated pursuant to the immediately preceding sentence and the Reinvestment Rate shall be interpolated or extrapolated from such yields on a straight-line basis, rounding in each of such relevant periods to the nearest month. For the purposes of calculating the Reinvestment Rate, the most recent Statistical Release published prior to the date of determination of the Make-Whole Amount shall be used.

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“Statistical Release” shall mean the statistical release designated “H.15(519)” or any successor publication which is published weekly by the Federal Reserve System and which establishes yields on actively traded United States government securities adjusted to constant maturities, or, if such statistical release is not published at the time of any determination under the Indenture, then such other reasonably comparable index which shall be designated by the Trust.

(10) The Trust shall not be obligated to redeem, repay or purchase the Additional Notes pursuant to any sinking fund or analogous provision or at the option of a Holder thereof.

(11) The Holders of the Additional Notes shall have no special rights in addition to those provided in the Indenture upon the occurrence of any particular events.

(12) Other than as set forth herein, there shall be no deletions from, modifications of or additions to the Events of Default or additional covenants of the Trust with respect to the Additional Notes set forth in the Indenture.

(13) The Additional Notes will be represented by a single global security (the “Global Security”) registered in the name of the Depository Trust Company (“DTC”) or its nominee. DTC or its nominee will credit, on its book-entry registration and transfer system, the respective amounts of Additional Notes represented by the Global Security. Ownership of beneficial interests in the Global Security will be limited to institutions that have accounts with DTC or its nominee (“Participants”) and to persons that may hold interests through Participants. Beneficial owners of interests in the Global Security may exchange such interests for Additional Notes of like tenor of any authorized form and denomination only in the manner provided in Section 305 of the Indenture. DTC shall be the depositary of the Global Security. The form of such Global Security, attached hereto as Exhibit A, is hereby approved.

(14) The Additional Notes shall not be issuable as Bearer Securities.

(15) Interest on any of the Additional Notes shall be payable only to the Person in whose name that the Additional Note (or one or more Predecessor Securities thereof) is registered at the close of business on the Regular Record Date for such interest.

(16) Sections 1402 and 1403 of the Indenture shall be applicable to the Additional Notes.

(17) The Additional Notes shall not be issuable in definitive form except under the circumstances described in Section 305 of the Indenture.

(18) The Trust shall not pay Additional Amounts as contemplated by Section 1010 of the Indenture on the Additional Notes.

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(19) The Trust shall have no obligation to permit the conversion of the Additional Notes into Common Shares or Preferred Shares of the Trust.

	Edmund B. Cronin, Jr.,
	Chairman, President and Chief Executive Officer
Date: October 3, 2005	Sara L. Grootwassink,
	Chief Financial Officer

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EX-5.1

Exhibit 5.1

[Letterhead of Arent Fox PLLC]

October 3, 2005

Washington Real Estate Investment Trust

6110 Executive Boulevard

Suite 800

Rockville, MD 20852

Gentlemen:

We have acted as counsel to Washington Real Estate Investment Trust, a real estate investment trust organized under the laws of Maryland (the “Trust”), in connection with (a) the Form S-3 registration statement, File No. 333-114410 (the “Registration Statement”) filed by the Trust with the Securities and Exchange Commission under the Securities Act of 1933, as amended (the “Act”), relating to the offering from time to time, as set forth in the prospectus contained in such Registration Statement (the “Prospectus”) of up to $502,979,150 aggregate offering price of (i) one or more series of the Trust’s debt securities (“Debt Securities”), (ii) one or more series of the Trust’s preferred shares of beneficial interest, (iii) the Trust’s common shares of beneficial interest and/or (iv) warrants to purchase Common Shares and (b) the $100,000,000 of senior Debt Securities (the “Notes”) offered as set forth in the supplement to the Prospectus dated October 3, 2005 (the “Prospectus Supplement”).

The Notes will be issued pursuant to an Indenture dated as of August 1, 1996 (the “Senior Indenture”) between the Trust and The J.P. Morgan Trust Company, National Association (the “Senior Trustee”).

We have examined and relied upon the originals or copies of such records, agreements, documents and other instruments and have made such inquiries of such officers and representatives of the Trust as we have deemed relevant and necessary as the basis for the opinions set forth herein. In such examination, we have assumed, without independent verification, the genuineness of all signatures (whether original or photostatic), the legal capacity of natural persons, the authenticity of all documents submitted to us as originals, and the conformity to original documents of all documents submitted to us as certified or photostatic copies. We have assumed, without independent verification, the accuracy of the relevant facts stated therein.

Washington Real Estate Investment Trust

October 3, 2005

Page 2

The opinions expressed in this letter concern only the effect of the laws of the State of New York, the State of Maryland and federal law as currently in effect, and we express no opinion on the law of any other jurisdiction. We assume no obligation to supplement this letter if any of the applicable laws change in any manner.

Based upon the foregoing and subject to the qualifications set forth below, we are of the opinion that:

1. The Senior Indenture has been duly authorized by the Trust. The Senior Indenture is the legally valid and binding agreement of the Trust.

2. The Notes have been duly established pursuant to the Senior Indenture, and when duly authenticated by the Senior Trustee and duly executed and delivered on behalf of the Trust against payment therefor in accordance with the terms and provisions of the Senior Indenture and as contemplated by the Registration Statement and the Prospectus Supplement, the Notes will be validly issued and constitute binding obligations of the Trust.

To the extent that the obligations of the Trust under the Senior Indenture may be dependent upon the following matters, we assume for purposes of this opinion that the Senior Trustee is duly organized, validly existing and in good standing under the laws of the jurisdiction of organization of such Trustee; that such Trustee is in compliance generally with respect to acting as a trustee under the Senior Indenture and with all applicable laws and regulations; and that such Trustee has the requisite organizational and legal power and authority to perform its obligations under such Senior Indenture.

We consent to the filing of this opinion as an exhibit to the Registration Statement and to the reference to our firm under the captions “Legal Opinions” in the Prospectus and “Legal Matters” in the Prospectus Supplement. In giving this consent, we do not hereby admit that we come within the category of persons whose consent is required under Section 7 of the Act or the General Rules and Regulations thereunder.

Very truly yours,

/s/ ARENT FOX PLLC