Exhibit 4(bb)



 Exhibit 4(bb) 
 FOURTH AMENDMENT TO CREDIT AGREEMENT 
 This Fourth Amendment to Credit Agreement (the
“Agreement”) is made as of June 30, 2006, by and among Washington Real Estate Investment Trust (the “Borrower”), JPMorgan Chase Bank, N.A., successor by merger to Bank One, NA, individually and as “Agent,” and one
or more existing “Lenders” shown on the signature pages hereof. 
 R E C I T A L S 
 A. Borrower, Agent and Lenders have entered into an Amended & Restated Credit Agreement dated as of July 21,2004; as amended by First
Amendment to Amended and Restated Credit Agreement dated as of September 23,2004, Second Amendment to Credit Agreement dated as of November 10, 2004, and Third Amendment to Credit Agreement dated as of March 27, 2006 (as further
amended, the “Credit Agreement”). All capitalized terms used herein and not otherwise defined shall have the meanings given to them in the Credit Agreement. 
 B. Borrower, Agent and Lenders have agreed to change certain financial covenants as set forth herein. 
 NOW,
THEREFORE, in consideration of the foregoing Recitals and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows: 
 AGREEMENTS 
 1. The foregoing Recitals
to this Amendment hereby are incorporated into and made part of this Amendment. 
 2. Section 6.21 (i) of the Credit Agreement is
hereby amended by deleting the reference therein to “fifty-five percent (55%)” and replacing it with “sixty percent (60%)”. 
 3. Section 6.21 (iii) of the Credit Agreement is hereby amended by deleting the reference therein to “1.82” and replacing it with “1.67”. 
 4. The Borrower hereby represents and warrants that, as of the Effective Date, there is no Default or Unmatured Default, the representations and
warranties contained in Article V of the Credit Agreement are true and correct in all material respects as of such date and the Borrower has no offsets or claims against any of the Lenders. 
 5. Except as expressly modified as provided herein, the Credit Agreement shall continue in full force and effect. 
 6. This Amendment may be executed in any number of counterparts, all of which taken together shall constitute one agreement, and any of the parties
hereto may execute this Amendment by signing any such counterpart. 







 IN WITNESS WHEREOF, the parties have executed and delivered this Amendment as of the date first written
above. 
  

			
	WASHINGTON REAL ESTATE INVESTMENT TRUST
		
	By:	 	 /s/ Sara Grootwassink

	 Print Name: Sara Grootwassink

	 Title: Chief Financial Officer

	 6110 Executive Blvd.

	 Suite 800

	 Rockville, MD 20858

	 Phone: 301-984-9400

	 Facsimile: 301-984-9610

	 Attention: Edmund B. Cronin, Jr.



  

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	JPMORGAN CHASE BANK, N.A., successor by merger to BANK ONE, NA, as Agent
		
	By:	 	 /s/ Kimberly Turner

	 Print Name: Kimberly Turner

	 Title: Vice President

	 277 Park Avenue

	 Third Floor

	 New York, NY 10172

	 Phone: (212)622-8177

	 Facsimile: (646)534-0574

	 Attention: Kimberly Turner



  

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	WELLS FARGO BANK, NATIONAL ASSOCIATION
		
	By:	 	 /s/ Erin Peart

	 Print Name: Erin Peart

	 Title: Senior Vice President

	 1750 H Street NW, Suite 400

	 Washington, D.C. 20006

	 Attn: Manager, Loan Administration

	 Phone: 202-303-3000

	 Fax: 202-429-2984



  

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