Exhibit 99.2

Supplemental Information

December 31, 2005

Contact:	6110 Executive Boulevard
Sara Grootwassink	Suite 800
Chief Financial Officer	Rockville, MD 20852
Direct Dial: (301) 255-0820	(301) 984-9400
E-mail: sgrootwassink@writ.com	(301) 984-9610 fax

Washington Real Estate Investment Trust

Supplemental Information

Table of Contents

December 31, 2005

Schedule	Page
About the Trust	2
Consolidated Statements of Operations	3
Consolidated Balance Sheets	4
Funds From Operations and Funds Available for Distribution	5
Earnings Before Interest Taxes Depreciation and Amortization (EBITDA)	6
Long-Term Debt Analysis	7
Capital Analysis	8
Core Portfolio Net Operating Income (NOI) Growth & Rental Rate Growth	9
Core Portfolio Net Operating Income (NOI) Summary	10
Core Portfolio Net Operating Income (NOI) Detail	11
Core Portfolio & Overall Occupancy Levels by Sector	12
Schedule of Properties	13
Schedule of Properties (continued)	14
Commercial Leasing Summary	15
10 Largest Tenants - Based on Annualized Base Rent	16
Industry Diversification	17
Lease Expirations as of December 31, 2005	18
2005 Acquisition and Disposition Summary	19
2005 Development Summary	20
12, 36 and 60 Month Total Returns Chart	21
Reporting Definitions	22

Washington Real Estate Investment Trust

About the Trust

Mission Statement

Washington Real Estate Investment Trust, founded in 1960 and headquartered in Rockville, Maryland, invests in a diversified range of income-producing property types. Our purpose is to acquire, develop and manage real estate investments in markets we know well and protect our assets from single property-type value fluctuations through diversified holdings. Our goal is to continue to safely increase earnings and shareholder value.

Company Background

We are a self-administered, self-managed, equity real estate investment trust investing in income-producing properties in the greater Washington-Baltimore region. We own a diversified portfolio of 70 properties consisting of 12 retail centers, 21 office properties, 7 medical office properties, 21 industrial/flex properties and 9 multifamily properties. We also own land for development.

Our dividends have increased every year for 35 consecutive years and our Funds From Operations (“FFO”) per share has increased every year for 33 consecutive years. WRIT shares are publicly traded on the New York Stock Exchange (symbol: WRE).

Certain statements in the supplemental disclosures which follow are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements involve known and unknown risks, uncertainties and other factors that may cause actual results to differ materially. Such risks, uncertainties and other factors include, but are not limited to, fluctuations in interest rates, availability of raw materials and labor costs, levels of competition, the effect of government regulation, the availability of capital, weather conditions, the timing and pricing of lease transactions and changes in general and local economic and real estate market conditions, and other risks and uncertainties detailed from time to time in our filings with the SEC, including our 2004 Form 10-K. We assume no obligation to update or supplement forward-looking statements that become untrue because of subsequent events.

Washington Real Estate Investment Trust

Consolidated Statements of Operations

(In thousands, except per share data)

(unaudited)

	Twelve Months Ended						Three Months Ended
OPERATING RESULTS	12/31/05			12/31/04			12/31/05			09/30/05			06/30/05			03/31/05			12/31/04
Real estate rental revenue	$	190,046		$	171,646		$	49,258		$	48,939		$	46,567		$	45,282		$	43,724
Real estate expenses		(58,116	)		(51,328	)		(15,041	)		(14,929	)		(13,957	)		(14,189	)		(12,968	)
		131,930			120,318			34,217			34,010			32,610			31,093			30,756
Real estate depreciation and amortization		(47,161	)		(39,309	)		(11,694	)		(11,988	)		(12,942	)		(10,537	)		(10,283	)
Income from real estate		84,769			81,009			22,523			22,022			19,668			20,556			20,473
Other income		918			326			263			335			207			113			88
Other income from property settlement		504			—			—			—			504			—			—
Interest expense		(37,743	)		(34,500	)		(10,074	)		(9,798	)		(9,283	)		(8,588	)		(8,551	)
General and administrative		(8,005	)		(6,194	)		(1,644	)		(2,036	)		(2,093	)		(2,232	)		(1,622	)
Income from continuing operations		40,443			40,641			11,068			10,523			9,003			9,849			10,388
Discontinued operations:
Income (loss) from operations of properties sold or held for sale		184			3,894			—			(100	)		(11	)		295			966
Gain on sale of real estate investment		37,011			1,029			—			3,038			1,883			32,090			1,029
Income (loss) from discontinued operations		37,195			4,923			—			2,938			1,872			32,385			1,995
Net Income	$	77,638		$	45,564		$	11,068		$	13,461		$	10,875		$	42,234		$	12,383
Per Share Data
Net Income	$	1.84		$	1.09		$	0.26		$	0.32		$	0.26		$	1.01		$	0.30
Fully diluted weighted average shares outstanding		42,203			41,863			42,131			42,147			42,059			42,015			41,911
Percentage of Revenues:
Real estate expenses		30.6	%		29.9	%		30.5	%		30.5	%		30.0	%		31.3	%		29.7	%
General and administrative		4.2	%		3.6	%		3.3	%		4.2	%		4.5	%		4.9	%		3.7	%
Ratios:
EBITDA / Interest expense		3.3 x			3.5 x			3.2 x			3.3 x			3.3 x			3.4 x			3.6 x
Income from continuing operations/Total real estate revenue		21.3	%		23.7	%		22.5	%		21.5	%		19.3	%		21.8	%		23.8	%
Net income/Total real estate revenue		40.9	%		26.5	%		22.5	%		27.5	%		23.4	%		93.3	%		28.3	%

Washington Real Estate Investment Trust

Consolidated Balance Sheets

(In thousands)

(unaudited)

	December 31, 2005			September 30, 2005			June 30, 2005			March 31, 2005			December 31, 2004
Assets
Land	$	226,217		$	226,217		$	218,732		$	217,590		$	204,831
Income producing property		1,024,702			1,014,464			949,623			936,188			895,553
Accumulated depreciation and amortization		(240,153	)		(229,490	)		(219,175	)		(209,442	)		(200,375	)
Net income producing property		1,010,766			1,011,191			949,180			944,336			900,009
Development in progress		58,241			23,222			17,427			15,313			12,280
Total investment in real estate, net		1,069,007			1,034,413			966,607			959,649			912,289
Investment in real estate sold or held for sale, net		—			—			2,790			2,813			36,986
Cash and cash equivalents		4,938			5,595			15,478			3,607			5,065
Restricted cash		1,764			7,195			7,535			14,476			962
Rents and other receivables, net of allowance for doubtful accounts		25,258			24,077			22,515			21,365			21,402
Prepaid expenses and other assets		40,318			41,061			34,085			34,883			34,969
Other assets related to properties sold or held for sale		—			—			38			38			720
Total Assets	$	1,141,285		$	1,112,341		$	1,049,048		$	1,036,831		$	1,012,393
Liabilities and Shareholders’ Equity
Accounts payable and other liabilities	$	32,728		$	28,439		$	30,140		$	23,285		$	22,586
Advance rents		5,572			5,522			5,179			5,551			5,108
Tenant security deposits		7,393			7,220			6,305			5,990			5,784
Other liabilities related to properties sold or held for sale		—			—			—			—			848
Mortgage notes payable		169,617			170,393			196,960			197,775			173,429
Lines of credit/short-term note payable		24,000			93,500			—			90,500			117,000
Notes payable		520,000			420,000			420,000			320,000			320,000
Total Liabilities		759,310			725,074			658,584			643,101			644,755
Minority interest		1,670			1,656			1,646			1,642			1,629
Shareholders’ Equity
Shares of beneficial interest, $0.01 par value; 100,000 shares authorized	$	421		$	421		$	421		$	420		$	420
Additional paid-in capital		407,972			407,614			407,572			405,119			405,029
Distributions in excess of net income		(25,228	)		(19,361	)		(15,878	)		(9,796	)		(35,544	)
Less: Deferred Compensation on restricted shares		(2,860	)		(3,063	)		(3,297	)		(3,655	)		(3,896	)
Total Shareholders’ Equity		380,305			385,611			388,818			392,088			366,009
Total Liabilities and Shareholders’ Equity	$	1,141,285		$	1,112,341		$	1,049,048		$	1,036,831		$	1,012,393
Total Debt / Total Market Capitalization		0.36:1			0.34:1			0.32:1			0.34:1			0.30:1

Note: Certain prior quarter amounts have been reclassified to conform to the current quarter presentation.

Washington Real Estate Investment Trust

Funds From Operations and Funds Available for Distribution

(In thousands, except per share data)

(unaudited)

	Twelve Months Ended						Three Months Ended
	12/31/05			12/31/04			12/31/05			09/30/05			06/30/05			03/31/05			12/31/04
Funds From Operations(1)
Net Income	$	77,638		$	45,564		$	11,068		$	13,461		$	10,875		$	42,234		$	12,383
Real estate depreciation and amortization		47,161			39,309			11,694			11,988			12,942			10,537			10,283
Discontinued operations:
Gain on property disposed		(37,011	)		(1,029	)		—			(3,038	)		(1,883	)		(32,090	)		(1,029	)
Other income from property settlement		(504	)		—			—			—			(504	)		—			—
Real estate depreciation and amortization		71			1,784			—			18			25			28			302
Funds From Operations (FFO)		87,355			85,628			22,762			22,429			21,455			20,709			21,939
FFO per share - basic	$	2.08		$	2.06		$	0.54		$	0.53		$	0.51		$	0.49		$	0.53
FFO per share - fully diluted	$	2.07		$	2.05		$	0.54		$	0.53		$	0.51		$	0.49		$	0.52
Funds Available for Distribution(2)
Tenant Improvements		(8,932	)		(9,432	)		(3,520	)		(1,544	)		(2,063	)		(1,805	)		(3,057	)
External and Internal Leasing Commissions Capitalized		(4,272	)		(2,713	)		(1,004	)		(1,111	)		(1,094	)		(1,063	)		(923	)
Recurring Capital Improvements		(9,125	)		(9,068	)		(2,445	)		(2,129	)		(2,360	)		(2,192	)		(3,009	)
Straight-Line Rent, Net		(3,070	)		(2,129	)		(730	)		(982	)		(661	)		(697	)		(610	)
Non-real estate depreciation and amortization		1,745			1,698			479			431			428			407			400
Amortization of lease intangibles-FAS 141		(17	)		(12	)		(17	)		(17	)		(33	)		50			51
Amortization of restricted share compensation		1,134			—			299			368			467			—			—
Other		308			—			7			—			301			—			—
Funds Available for Distribution (FAD)	$	65,126		$	63,972		$	15,831		$	17,445		$	16,440		$	15,410		$	14,791
Total Dividends Paid	$	67,360		$	64,836		$	16,963		$	16,955		$	16,956		$	16,486		$	16,483
Average shares - basic		42,069			41,642			42,013			42,005			41,932			41,866			41,711
Average shares - fully diluted		42,203			41,863			42,131			42,147			42,059			42,015			41,911

⁽¹⁾ Funds From Operations (“FFO”) – The National Association of Real Estate Investment Trusts, Inc. (“NAREIT”) defines FFO (April, 2002 White Paper) as net income (computed in accordance with generally accepted accounting principles (“GAAP”)) excluding gains (or losses) from sales of property plus real estate depreciation and amortization. We consider FFO to be a standard supplemental measure for equity real estate investment trusts (“REITs”) because it facilitates an understanding of the operating performance of our properties without giving effect to real estate depreciation and amortization, which historically assumes that the value of real estate assets diminishes predictably over time. Since real estate values have instead historically risen or fallen with market conditions, we believe that FFO more accurately provides investors an indication of our ability to incur and service debt, make capital expenditures and fund other needs. FFO is a non-GAAP measure.

⁽²⁾ Funds Available for Distribution (“FAD”) is calculated by subtracting from FFO (1) recurring expenditures, tenant improvements and leasing costs, that are capitalized and amortized and are necessary to maintain our properties and revenue stream and (2) straight line rents, (3) cash rent abatements, then adding (4) non-real estate depreciation and amortization and adding or subtracting the amortization of lease intangibles as appropriate. FAD is included herein, because we consider it to be a measure of a REIT’s ability to incur and service debt and to distribute dividends to its shareholders. FAD is a non-GAAP and non-standardized measure, and may be calculated differently by other REITs.

Washington Real Estate Investment Trust

Earnings Before Interest Taxes Depreciation and Amortization (EBITDA)

(In thousands)

(unaudited)

	Three Months Ended
	12/31/05			09/30/05			06/30/05			03/31/05			12/31/04
EBITDA(1)
Net income	$	11,068		$	13,461		$	10,875		$	42,234		$	12,383
Add:
Interest expense		10,074			9,798			9,283			8,588			8,551
Real estate depreciation and amortization		11,694			12,006			12,967			10,565			10,585
Non-real estate depreciation		71			75			80			84			95
Less:
Gain on sale of real estate		—			(3,038	)		(1,883	)		(32,089	)		(1,029	)
Other income		(263	)		(335	)		(207	)		(113	)		(88	)
Other income from property settlement		—			—			(504	)		—			—
EBITDA	$	32,644		$	31,967		$	30,611		$	29,269		$	30,497

⁽¹⁾ EBITDA is earnings before interest, taxes, depreciation and amortization. We consider EBITDA to be an appropriate supplemental performance measure because it eliminates depreciation, interest and the gain (loss) from property dispositions, which permits investors to view income from operations without the effect of non-cash depreciation or the cost of debt. EBITDA is a non-GAAP measure.

Washington Real Estate Investment Trust

Long-Term Debt Analysis

(In thousands, except per share amounts)

	December 31, 2005			September 30, 2005			June 30, 2005			March 31, 2005			December 31, 2004
Balances Outstanding
Secured
Conventional fixed rate	$	169,617		$	170,393		$	196,960		$	197,775		$	173,429
Secured total		169,617			170,393			196,960			197,775			173,429
Unsecured
Fixed rate bonds and notes		520,000			420,000			420,000			320,000			320,000
Credit facility		24,000			93,500			—			90,500			117,000
Unsecured total		544,000			513,500			420,000			410,500			437,000
Total	$	713,617		$	683,893		$	616,960		$	608,275		$	610,429
Average Interest Rates
Secured
Conventional fixed rate		5.9	%		5.9	%		6.2	%		6.2	%		6.6	%
Secured total		5.9	%		5.9	%		6.2	%		6.2	%		6.6	%
Unsecured
Fixed rate bonds		5.9	%		6.0	%		6.0	%		6.2	%		6.2	%
Credit facilities		5.0	%		4.5	%		0.0	%		3.4	%		3.1	%
Unsecured total		5.8	%		5.7	%		6.0	%		5.6	%		5.4	%
Average		5.9	%		5.8	%		6.0	%		5.8	%		5.7	%

Maturity Schedule

	Future Maturities of Debt								Average Interest Rate
Year	Secured Debt		Unsecured Debt		Credit Facilities		Total Debt
2006	$	8,678	$	50,000	$	—	$	58,678	7.2	%
2007		9,991		—		—		9,991	6.5	%
2008		2,233		60,000		24,000		86,233	6.2	%
2009		52,338		—		—		52,338	7.1	%
2010		2,438		—		—		2,438	5.2	%
2011		11,595		—		—		11,595	5.3	%
2012		19,252		50,000		—		69,252	5.0	%
2013		63,092		60,000		—		123,092	5.3	%
2014		—		100,000		—		100,000	5.3	%
Thereafter		—		200,000		—		200,000	5.9	%
Total maturities	$	169,617	$	520,000	$	24,000	$	713,617	5.9	%

Weighted average maturity = 7.4 years

Washington Real Estate Investment Trust

Capital Analysis

(In thousands, except per share amounts)

	December 31, 2005			September 30, 2005			June 30, 2005			March 31, 2005			December 31, 2004
Market Data
Shares Outstanding		42,139			42,125			42,123			42,004			42,000
Market Price per Share	$	30.35		$	31.11		$	31.20		$	28.75		$	33.87
Equity Market Capitalization	$	1,278,919		$	1,310,509		$	1,314,238		$	1,207,615		$	1,422,540
Total Debt	$	713,617		$	683,893		$	616,960		$	608,275		$	610,429
Total Market Capitalization	$	1,992,536		$	1,994,402		$	1,931,198		$	1,815,890		$	2,032,969
Total Debt to Market Capitalization		0.36:1			0.34:1			0.32:1			0.34:1			0.30:1
Earnings to Fixed Charges(1)		2.0 x			2.0 x			1.9 x			2.1 x			2.2 x
Debt Service Coverage Ratio(2)		3.0 x			3.0 x			3.0 x			3.2 x			3.3 x
Dividend Data
Total Dividends Paid	$	16,963		$	16,955		$	16,956		$	16,486		$	16,483
Common Dividend per Share	$	0.4025		$	0.4025		$	0.4025		$	0.3925		$	0.3925
Payout Ratio (FFO per share basis)		74.5	%		75.6	%		78.9	%		79.6	%		75.0	%

⁽¹⁾ The ratio of earnings to fixed charges is computed by dividing earnings by fixed charges. For this purpose, earnings consist of income from continuing operations plus fixed charges, less capitalized interest. Fixed charges consist of interest expense, including amortized costs of debt issuance, plus interest costs capitalized.

⁽²⁾ Debt service coverage ratio is computed by dividing earnings before interest income and expense, depreciation, amortization and gain on sale of real estate by interest expense and principal amortization.

Washington Real Estate Investment Trust

Core Portfolio Net Operating Income (NOI) Growth & Rental Rate Growth

Q4 2005 vs. Q4 2004

Cash Basis

Sector	NOI Growth		Rental Rate Growth
Multifamily	-1.3	%	4.2	%
Office Buildings	0.0	%	0.0	%
Medical Office Buildings	6.0	%	2.9	%
Retail Centers	3.0	%	2.5	%
Industrial / Flex Properties	0.5	%	3.7	%
Overall Core Portfolio	1.0	%	1.9	%

GAAP Basis

Sector	NOI Growth		Rental Rate Growth
Multifamily	-1.2	%	4.3	%
Office Buildings	-0.5	%	-0.1	%
Medical Office Buildings	3.5	%	0.9	%
Retail Centers	3.1	%	2.7	%
Industrial / Flex Properties	0.8	%	4.3	%
Overall Core Portfolio	0.7	%	1.7	%

Washington Real Estate Investment Trust

Core Portfolio Net Operating Income (NOI) Summary

(In Thousands)

	Three Months Ended December 31,
	2005		2004		% Change
Cash Basis:
Multifamily	$	4,360	$	4,418	-1.3	%
Office Buildings		12,395		12,400	0.0	%
Medical Office Buildings		3,035		2,863	6.0	%
Retail Centers		5,637		5,474	3.0	%
Industrial/Flex		4,787		4,765	0.5	%
	$	30,214	$	29,920	1.0	%
GAAP Basis:
Multifamily	$	4,362	$	4,416	-1.2	%
Office Buildings		12,648		12,707	-0.5	%
Medical Office Buildings		3,136		3,031	3.5	%
Retail Centers		5,730		5,557	3.1	%
Industrial/Flex		4,825		4,787	0.8	%
	$	30,701	$	30,498	0.7	%

Washington Real Estate Investment Trust

Core Portfolio Net Operating Income (NOI) Detail

(In Thousands)

	Three Months Ended December 31, 2005
	Multifamily			Office			Medical Office			Retail			Industrial			Corporate and Other			Total
Real estate rental revenue
Core Portfolio	$	7,663		$	19,145		$	4,189		$	7,296		$	6,363		$	—		$	44,656
Non-core- acquired 1		—			544			295			1,122			2,641			—			4,602
Total		7,663			19,689			4,484			8,418			9,004			—			49,258
Real estate expenses
Core Portfolio		3,301			6,497			1,053			1,566			1,538			—			13,955
Non-core- acquired 1		—			170			115			209			592			—			1,086
Total		3,301			6,667			1,168			1,775			2,130			—			15,041
Net Operating Income (NOI)
Core Portfolio		4,362			12,648			3,136			5,730			4,825			—			30,701
Non-core- acquired 1		—			374			180			913			2,049			—			3,516
Total	$	4,362		$	13,022		$	3,316		$	6,643		$	6,874		$	—		$	34,217
Core Portfolio NOI GAAP Basis (from above)	$	4,362		$	12,648		$	3,136		$	5,730		$	4,825		$	—		$	30,701
Straight-line revenue, net for core properties		(2	)		(199	)		(102	)		(122	)		(68	)		—			(493	)
Amortization of lease intangibles for core properties		—			(54	)		1			29			30			—			6
Core portfolio NOI, Cash Basis	$	4,360		$	12,395		$	3,035		$	5,637		$	4,787		$	—		$	30,214
Reconciliation of NOI to Net Income
Total NOI	$	4,362		$	13,022		$	3,316		$	6,643		$	6,874		$	—		$	34,217
Other revenue		—			—			—			—			—			263			263
Other income from property settlement		—			—			—			—			—			—			—
Interest expense		(913	)		—			(777	)		(342	)		(395	)		(7,647	)		(10,074	)
Depreciation and amortization		(1,416	)		(5,160	)		(1,254	)		(1,263	)		(2,440	)		(161	)		(11,694	)
General and administrative		—			—			—			—			—			(1,644	)		(1,644	)
Discontinued Operations 2		—			—			—			—			—			—			—
Net Income	$	2,033		$	7,862		$	1,285		$	5,038		$	4,039		$	(9,189	)	$	11,068
	Three Months Ended December 31, 2004
	Multifamily			Office			Medical Office			Retail			Industrial			Corporate and Other			Total
Real estate rental revenue
Core Portfolio	$	7,336		$	18,906		$	4,055		$	6,962		$	6,083		$	—		$	43,342
Non-core- acquired 1		—			—			281			—			101			—			382
Total		7,336			18,906			4,336			6,962			6,184			—			43,724
Real estate expenses
Core Portfolio		2,920			6,199			1,024			1,405			1,296			—			12,844
Non-core- acquired 1		—			—			113			—			11			—			124
Total		2,920			6,199			1,137			1,405			1,307			—			12,968
Net Operating Income (NOI)
Core Portfolio		4,416			12,707			3,031			5,557			4,787			—			30,498
Non-core- acquired 1		—			—			168			—			90			—			258
Total	$	4,416		$	12,707		$	3,199		$	5,557		$	4,877		$	—		$	30,756
Core Portfolio NOI GAAP Basis (from above)	$	4,416		$	12,707		$	3,031		$	5,557		$	4,787		$	—		$	30,498
Straight-line revenue, net for core properties		2			(258	)		(169	)		(111	)		(52	)		—			(588	)
Amortization of lease intangibles for core properties		—			(49	)		1			28			30			—			10
Core portfolio NOI, Cash Basis	$	4,418		$	12,400		$	2,863		$	5,474		$	4,765		$	—		$	29,920
Reconciliation of NOI to Net Income
Total NOI	$	4,416		$	12,707		$	3,199		$	5,557		$	4,877		$	—		$	30,756
Other revenue		—			—			—			—			—			88			88
Non-Disposal Gain		—			—			—			—			—			—			—
Interest expense		(1,065	)		(678	)		(502	)		—			(284	)		(6,022	)		(8,551	)
Depreciation and amortization		(1,228	)		(5,105	)		(1,240	)		(928	)		(1,510	)		(272	)		(10,283	)
General and administrative		—			—			—			—			—			(1,622	)		(1,622	)
Discontinued Operations 2		—			1,939			—			—			56			—			1,995
Net Income	$	2,123		$	8,863		$	1,457		$	4,629		$	3,139		$	(7,828	)	$	12,383

¹ Non-core acquired properties for Q4 2005 and Q4 2004 were 8301 Arlington Boulevard, Dulles Business Park, Frederick Crossing, the Coleman Building and Albemarle Point.

² Discontinued operations consists of: 8230 Boone Boulevard, 7700 Leesburg, Tycon Plaza II, Tycon Plaza III and the Pepsi Distribution Center.

Washington Real Estate Investment Trust

Core Portfolio & Overall Occupancy Levels by Sector

Q4 2005 vs. Q4 2004

GAAP Basis

	Core Portfolio				All Properties
Sector	4th QTR 2005		4th QTR 2004		4th QTR 2005		4th QTR 2004
Multifamily	92.0	%	91.6	%	92.0	%	91.6	%
Office Buildings	89.2	%	88.0	%	89.0	%	86.6	%
Medical Office Buildings	99.6	%	98.6	%	98.5	%	98.1	%
Retail Centers	98.3	%	95.8	%	98.6	%	95.8	%
Industrial / Flex Properties	93.0	%	94.2	%	94.9	%	94.3	%
Overall Portfolio	92.4	%	91.5	%	92.8	%	90.6	%

Washington Real Estate Investment Trust

Schedule of Properties

December 31, 2005

PROPERTIES	LOCATION	YEAR ACQUIRED	YEAR CONSTRUCTED	NET RENTABLE SQUARE FEET
Office Buildings
1901 Pennsylvania Avenue	Washington, DC	1977	1960	97,000
51 Monroe Street	Rockville, MD	1979	1975	208,000
515 King Street	Alexandria, VA	1992	1966	78,000
The Lexington Building	Rockville, MD	1993	1970	46,000
The Saratoga Building	Rockville, MD	1993	1977	59,000
Brandywine Center	Rockville, MD	1993	1969	35,000
6110 Executive Boulevard	Rockville, MD	1995	1971	199,000
1220 19th Street	Washington, DC	1995	1976	102,000
Maryland Trade Center I	Greenbelt, MD	1996	1981	190,000
Maryland Trade Center II	Greenbelt, MD	1996	1984	158,000
1600 Wilson Boulevard	Arlington, VA	1997	1973	166,000
7900 Westpark Drive	McLean, VA	1997	1972/1986/19991	521,000
600 Jefferson Plaza	Rockville, MD	1999	1985	115,000
1700 Research Boulevard	Rockville, MD	1999	1982	103,000
Parklawn Plaza	Rockville, MD	1999	1986	40,000
Wayne Plaza	Silver Spring, MD	2000	1970	91,000
Courthouse Square	Alexandria, VA	2000	1979	113,000
One Central Plaza	Rockville, MD	2001	1974	267,000
The Atrium Building	Rockville, MD	2002	1980	81,000
1776 G Street	Washington, DC	2003	1979	262,000
Albemarle Point	Chantilly, VA	2005	2001	90,000
Subtotal				3,021,000
Medical Office Buildings
Woodburn Medical Park I	Annandale, VA	1998	1984	71,000
Woodburn Medical Park II	Annandale, VA	1998	1988	96,000
Prosperity Medical Center I	Merrifield, VA	2003	2000	92,000
Prosperity Medical Center II	Merrifield, VA	2003	2001	88,000
Prosperity Medical Center III	Merrifield, VA	2003	2002	75,000
Shady Grove Medical Village II	Rockville, MD	2004	1999	66,000
8301 Arlington Boulevard	Fairfax, VA	2004	1965	50,000
Subtotal				538,000
Retail Centers
Takoma Park	Takoma Park, MD	1963	1962	51,000
Westminster	Westminster, MD	1972	1969	146,000
Concord Centre	Springfield, VA	1973	1960	76,000
Wheaton Park	Wheaton, MD	1977	1967	72,000
Bradlee	Alexandria, VA	1984	1955	168,000
Chevy Chase Metro Plaza	Washington, DC	1985	1975	50,000
Montgomery Village Center	Gaithersburg, MD	1992	1969	198,000
Shoppes of Foxchase2	Alexandria, VA	1994	1960	128,000
Frederick County Square	Frederick, MD	1995	1973	227,000
800 S. Washington Street3	Alexandria, VA	1998/2003	1955/1959	45,000
Centre at Hagerstown	Hagerstown, MD	2002	2000	334,000
Frederick Crossing	Frederick, MD	2005	1999/2003	295,000
Subtotal				1,790,000

¹ A 49,000 square foot addition to 7900 Westpark Drive was completed in September 1999.

² Approximately 60,000 square feet of the center is under redevelopment

³ South Washington Street includes 718 Jefferson Street, acquired in May 2003 to complete the ownership of the entire block of 800 S. Washington Street. See Development Summary on page 19.

Washington Real Estate Investment Trust

Schedule of Properties (Cont.)

December 31, 2005

PROPERTIES	LOCATION	YEAR ACQUIRED	YEAR CONSTRUCTED	NET RENTABLE* SQUARE FEET
Multifamily Buildings * / # units
3801 Connecticut Avenue / 307	Washington, DC	1963	1951	177,000
Roosevelt Towers / 190	Falls Church, VA	1965	1964	168,000
Country Club Towers / 227	Arlington, VA	1969	1965	159,000
Park Adams / 200	Arlington, VA	1969	1959	172,000
Munson Hill Towers / 279	Falls Church, VA	1970	1963	259,000
The Ashby at McLean / 250	McLean, VA	1996	1982	244,000
Walker House Apartments / 212	Gaithersburg, MD	1996	1971/2003 4	154,000
Bethesda Hill Apartments / 194	Bethesda, MD	1997	1986	226,000
Avondale / 236	Laurel, MD	1999	1987	170,000
Subtotal (2,095 units)				1,729,000
Industrial Distribution / Flex Properties
Fullerton Business Center	Springfield, VA	1985	1980	104,000
Charleston Business Center	Rockville, MD	1993	1973	85,000
Tech 100 Industrial Park	Elkridge, MD	1995	1990	167,000
Crossroads Distribution Center	Elkridge, MD	1995	1987	85,000
The Alban Business Center	Springfield, VA	1996	1981/1982	87,000
The Earhart Building	Chantilly, VA	1996	1987	93,000
Ammendale Technology Park I	Beltsville, MD	1997	1985	167,000
Ammendale Technology Park II	Beltsville, MD	1997	1986	108,000
Pickett Industrial Park	Alexandria, VA	1997	1973	246,000
Northern Virginia Industrial Park	Lorton, VA	1998	1968/1991	788,000
8900 Telegraph Road	Lorton, VA	1998	1985	32,000
Dulles South IV	Chantilly, VA	1999	1988	83,000
Sully Square	Chantilly, VA	1999	1986	95,000
Amvax	Beltsville, MD	1999	1986	31,000
Sullyfield Center	Chantilly, VA	2001	1985	245,000
Fullerton Industrial Center	Springfield, VA	2003	1980	137,000
8880 Gorman Road	Laurel, MD	2004	2000	141,000
Dulles Business Park Portfolio	Chantilly, VA	2004/2005	1999-2005	325,000
Albemarle Point	Chantilly, VA	2005	2001/2003/2005	206,000
Subtotal				3,225,000
TOTAL				10,303,000

* Multifamily buildings are presented in gross square feet.

⁴ A 16 unit addition referred to as The Gardens at Walker House was completed in October 2003.

Washington Real Estate Investment Trust

Commercial Leasing Summary

Three and twelve months ended 12/31/05

	Three months ended 31-Dec-05	Twelve months ended 31-Dec-05
Gross Leasing Square Footage
Office Buildings	166,585	711,715
Medical Office	3,875	40,145
Retail Centers	44,574	180,698
Industrial Centers	175,674	787,484
Total	390,708	1,720,042
Weighted Average Term (yrs)
Office Buildings	4.8	5.2
Medical Office	3.7	3.3
Retail Centers	7.0	6.0
Industrial Centers	3.4	3.9
Total	4.4	4.7

	GAAP			CASH			GAAP			CASH
Rental Rate Increases:
Rate on expiring leases
Office Buildings	$	25.97		$	27.56		$	29.00		$	29.87
Medical Office		31.03			32.03			29.08			29.91
Retail Centers		15.08			15.68			20.77			21.23
Industrial Centers		9.15			9.41			8.36			8.54
Total	$	17.22		$	18.09		$	18.69		$	19.20
Rate on new and renewal leases
Office Buildings	$	27.50		$	25.87		$	30.10		$	28.55
Medical Office		35.63			34.07			32.34			31.17
Retail Centers		22.83			21.00			26.71			24.84
Industrial Centers		10.28			9.92			9.38			8.80
Total	$	19.30		$	18.22		$	20.31		$	19.18
% Increase
Office Buildings		5.89	%		-6.13	%		3.79	%		-4.42	%
Medical Office		14.82	%		6.37	%		11.21	%		4.21	%
Retail Centers		51.39	%		33.93	%		28.60	%		17.00	%
Industrial Centers		12.35	%		5.42	%		12.20	%		3.04	%
Total		12.08	%		0.72	%		8.67	%		-0.10	%
	Total Dollars			Dollars per Square Foot			Total Dollars			Dollars per Square Foot
Tenant Improvements and Leasing Costs
Office Buildings	$	2,536,666		$	15.23		$	12,774,591		$	17.95
Medical Office		42,751			11.03			424,991			10.59
Retail Centers		64,069			1.44			1,372,989			7.60
Industrial Centers		493,292			2.81			2,673,986			3.40
Total	$	3,136,778		$	8.03		$	17,246,557		$	10.03

Washington Real Estate Investment Trust

10 Largest Tenants - Based on Annualized Rent

December 31, 2005

Tenant	Number of Buildings	Weighted Average Remaining Lease Term in Months	Percentage of Aggregate Portfolio Annualized Rent		Aggregate Rentable Square Feet	Percentage of Aggregate Occupied Square Feet
World Bank	1	53	5.84	%	210,354	2.65	%
Sunrise Senior Living, Inc.	1	93	3.30	%	180,066	2.27	%
General Services Administration	7	39	2.44	%	248,511	3.13	%
Sun Microsystems, Inc.	1	12	2.07	%	110,184	1.39	%
INOVA Health Care Services	4	56	1.86	%	83,631	1.05	%
George Washington University	2	31	1.43	%	66,066	0.83	%
IQ Solutions	1	53	1.28	%	58,473	0.74	%
United Communications Group	1	29	1.17	%	63,189	0.80	%
Lockheed Corporation*	2	13	1.14	%	73,770	0.93	%
Westat, Inc.	2	47	1.03	%	72,646	0.92	%
Total/Weighted Average		47	21.56	%	1,166,890	14.71	%

* A lease renewal was executed January 17, 2006 for 58,531sf through 03/31/09 for Lockheed Corporation. This extends the weighted average remaining lease term to 37 months.

Washington Real Estate Investment Trust

Industry Diversification

December 31, 2005

Industry Classification (NAICS)	Annualized Base Rental Revenue		Percentage of Aggregate Annualized Rent		Aggregate Rentable Square Feet	Percentage of Aggregate Square Feet
Professional, Scientific and Technical Services	$	34,323,854	23.45	%	1,688,732	21.28	%
Ambulatory Health Care Services		18,095,366	12.36	%	608,549	7.67	%
Credit Intermediation and Related Activities		14,191,131	9.69	%	423,572	5.34	%
Executive, Legislative & Other General Government Support		6,967,057	4.76	%	381,892	4.81	%
Nursing and Residential Care Facilities		4,834,283	3.30	%	180,677	2.28	%
Food Services and Drinking Places		4,739,017	3.24	%	208,891	2.63	%
Religious, Grantmaking, Civic, Professional & Similar Org.		4,594,301	3.14	%	167,985	2.12	%
Food and Beverage Stores		3,939,969	2.69	%	253,536	3.20	%
Administrative and Support Services		3,670,250	2.51	%	297,957	3.76	%
Furniture and Home Furnishing Stores		3,170,980	2.17	%	231,885	2.92	%
Aerospace Product & Parts Manufacturing		2,919,634	1.99	%	156,093	1.97	%
Educational Services		2,904,981	1.98	%	105,816	1.33	%
Miscellaneous Store Retailers		2,783,326	1.90	%	216,952	2.73	%
Specialty Trade Contractors		2,554,204	1.74	%	312,678	3.94	%
General Merchandise Stores		2,179,142	1.49	%	300,915	3.79	%
Other		34,514,908	23.59	%	2,398,214	30.23	%
Total	$	146,382,403	100.00	%	7,934,344	100.00	%

Washington Real Estate Investment Trust

Lease Expirations

December 31, 2005

Year	Number of Leases	Rentable Square Feet	Percent of Rentable Square Feet		Annualized Rent *		Average Rental Rate		Percent of Annualized Rent *
Office:
2006	108	472,798	17.8	%	$	12,576,688	$	26.60	17.4	%
2007	71	262,778	9.9	%		6,777,757		25.79	9.4	%
2008	71	325,386	12.2	%		9,209,844		28.30	12.7	%
2009	71	405,323	15.2	%		10,968,475		27.06	15.1	%
2010	71	533,764	20.1	%		15,284,765		28.64	21.1	%
2011 and thereafter	66	658,045	24.8	%		17,569,231		26.70	24.3	%
	458	2,658,094	100.0	%	$	72,386,760	$	27.23	100.0	%
Medical Office:
2006	15	18,153	3.4	%	$	579,430	$	31.92	3.5	%
2007	13	31,702	6.0	%		983,924		31.04	6.0	%
2008	25	84,489	16.0	%		2,628,354		31.11	15.9	%
2009	12	35,033	6.6	%		1,099,463		31.38	6.6	%
2010	24	117,335	22.2	%		3,761,890		32.06	22.7	%
2011 and thereafter	42	242,076	45.8	%		7,488,924		30.94	45.3	%
	131	528,788	100.0	%	$	16,541,985	$	31.28	100.0	%
Retail:
2006	41	99,947	5.7	%	$	2,238,045	$	22.39	8.0	%
2007	54	162,418	9.3	%		3,477,909		21.41	12.4	%
2008	31	178,755	10.2	%		1,755,827		9.82	6.3	%
2009	35	147,403	8.4	%		3,005,909		20.39	10.8	%
2010	44	280,442	16.0	%		4,835,924		17.24	17.3	%
2011 and thereafter	78	883,535	50.4	%		12,615,781		14.28	45.2	%
	283	1,752,500	100.0	%	$	27,929,395	$	15.94	100.0	%
Industrial:
2006	63	546,843	18.2	%	$	5,043,579	$	9.22	17.1	%
2007	39	414,913	13.8	%		3,676,656		8.86	12.5	%
2008	48	583,456	19.5	%		5,641,470		9.67	19.1	%
2009	36	519,331	17.3	%		4,996,567		9.62	16.9	%
2010	29	245,107	8.2	%		2,721,575		11.10	9.2	%
2011 and thereafter	30	688,312	23.0	%		7,444,416		10.82	25.2	%
	245	2,997,962	100.0	%	$	29,524,263	$	9.85	100.0	%
Total:
2006	227	1,137,741	14.3	%	$	20,437,742	$	17.96	14.0	%
2007	177	871,811	11.0	%		14,916,246		17.11	10.2	%
2008	175	1,172,086	14.8	%		19,235,495		16.41	13.1	%
2009	154	1,107,090	13.9	%		20,070,414		18.13	13.7	%
2010	168	1,176,648	14.8	%		26,604,154		22.61	18.2	%
2011 and thereafter	216	2,471,968	31.2	%		45,118,352		18.25	30.8	%
	1,117	7,937,344	100.0	%	$	146,382,403	$	18.44	100.0	%

* Annualized Rent is as of December 31, 2005 rental revenue (cash basis) multiplied by 12.

Washington Real Estate Investment Trust

2005 Acquisition and Disposition Summary

as of December 31, 2005

($’s in thousands)

Acquisition Summary

	Acquisition Date	Square Feet	Leased Percentage at Acquisition		December 31, 2005 Leased Percentage		Investment (in thousands)
Frederick Crossing Shopping Center	03/23/05	294,724	100	%	100	%	$	44,800
Frederick, MD
Coleman Building	04/08/05	59,767	64	%	100	%	$	8,800
Chantilly, VA
Albemarle Point	07/29/05	296,105	97	%	97	%	$	66,800
Chantilly, VA
Dulles Station*	12/05/05	N/A	N/A		N/A		$	24,700
Herndon, VA
Total							$	145,100

* Land held for development

Disposition Summary

	Disposition Date	Property Type	Square Feet	Sale Price (in thousands)		GAAP Gain (in thousands)
8230 Boone Blvd	11/15/04	Office	58,000	$	10,000	$	1,883	*
7700 Leesburg Pike	02/01/05	Office	147,000	$	20,150	$	8,527
Tycon Plaza II	02/01/05	Office	127,000	$	19,400	$	8,867
Tycon Plaza III	02/01/05	Office	137,000	$	27,950	$	14,696
Pepsi-Cola Distribution Center	09/08/05	Industrial	69,000	$	6,000	$	3,038
Total			538,000	$	83,500	$	37,011

* Reflects the recognition of deferred gain in conjunction with property disposal in November 2004.

Washington Real Estate Investment Trust

2005 Development Summary

as of December 31, 2005

($’s in thousands)

Property and Location	Total Rentable Square Feet or # of Units	Percentage Leased or Committed		Anticipated Total Cash Cost			Cash Cost to Date			Anticipated Construction Completion Date
Development
Rosslyn Towers 1				$	63,600		$	20,201	3
Arlington, VA
(High Rise)	178 units, 1,600 sq ft. retail & 498 parking spaces underground	0	%							2Q 07
(Mid Rise)	46 units, 4,300 sq ft. retail & 225 parking spaces underground	0	%							4Q 06
South Washington Street 2	75 units & 2,600 sq ft. retail	0	%	$	32,200		$	7,207	3	1Q 07
Alexandria, VA
Dulles Station 4 Phase I	185,000 sq ft office	0	%	$	51,000	5	$	10,243	3	4Q 07
Herndon, VA     Phase II	355,000 sq ft office				TBD		$	16,349	3	TBD
Total				$	146,800		$	54,000
Re-development
Foxchase Shopping Center 6	60,600 sq ft.	97	%	$	10,000		$	2,679		4Q 06
Alexandria, VA

¹ Rosslyn Towers, formerly known as WRIT Rosslyn Center, is a planned 224 unit multifamily property. 1620 Wilson Boulevard was acquired in conjunction with the overall development plan for Rosslyn Towers.

² 718 E. Jefferson Street was acquired to complete our ownership of the entire block of 800 S. Washington Street. The surface parking lot on this block is now in the preliminary stages of development. We refer to this development project as South Washington Street.

³ Includes land cost.

⁴ Dulles Station is 5.27 acres acquired in December, 2005.

⁵ Represents total costs associated with Phase I. We will concurrently build a portion of the structured garage, allocated to Phase II, which will cost an additional $5M.

⁶ Redevelopment in connection with a lease executed in September 2004 with Harris Teeter.

WRIT vs. Morgan Stanley REIT Index & NAREIT All Equity Index & Russell 2000

12, 36, and 60 Month Total Returns

December 31, 2005

Washington Real Estate Investment Trust

Reporting Definitions

December 31, 2005

Annualized base rent (ABR) is calculated as monthly base rent (cash basis) per the lease, as of the reporting period, multiplied by 12.

Debt to total market capitalization is total debt from the balance sheet divided by the sum of total debt from the balance sheet plus the market value of shares outstanding at the end of the period.

EBITDA (a non-GAAP measure) is earnings before interest, taxes, depreciation and amortization.

Ratio of earnings to fixed charges is computed by dividing earnings by fixed charges. For this purpose, earnings consist of income from continuing operations (or net income if there are no discontinued operations) plus fixed charges, less capitalized interest. Fixed charges consist of interest expense, including amortized costs of debt issuance, plus interest costs capitalized.

Debt service coverage ratio is computed by dividing earnings before interest income and expense, depreciation, amortization and gain on sale of real estate by interest expense and principal amortization.

Funds from operations (FFO) - The National Association of Real Estate Investment Trusts, Inc. (NAREIT) defines FFO (April, 2002 White Paper) as net income (computed in accordance with generally accepted accounting principles (GAAP)) excluding gains (or losses) from sales of property plus real estate depreciation and amortization. FFO is a non-GAAP measure.

Funds Available for Distribution (FAD), a non-GAAP measure, is calculated by subtracting from FFO recurring expenditures, tenant improvements and leasing costs, that are capitalized and amortized and are necessary to maintain our properties and revenue stream and straight line rents, then adding non-real estate depreciation and amortization and rent abatement amortization, and adding or subtracting amortization of lease intangibles, as appropriate.

Recurring capital expenditures represents non-accretive building improvements and leasing costs required to maintain current revenues. Recurring capital expenditures do not include acquisition capital that was taken into consideration when underwriting the purchase of a building or which are incurred to bring a building up to “operating standard.”

Rent increases on renewals and rollovers are calculated as the difference, weighted by square feet, of the net ABR due the first month after a term commencement date and the net ABR due the last month prior to the termination date of the former tenant’s term.

Core portfolio properties include all properties that were owned for the entirety of the current and prior year reporting periods.

Core portfolio net operating income (NOI) growth is the change in the NOI of the core portfolio properties from the prior reporting period to the current reporting period.