PS Business Parks, Inc. Reports Results for the First Quarter Ended March 31, 2012

Funds from operations (aFFOa) allocable to common and dilutive shares before non-cash adjustments were $37.1million, or $1.17 per common and dilutive share for the three months ended March 31, 2012, a 7.3% per share increase from the three months ended March 31, 2011 of $35.0 million, or $1.09 per common and dilutive share before non-cash adjustments. The increase in FFO per common and dilutive share before non-cash adjustments for the three months ended March31,2012 over the same period in 2011 was primarily due to the increase in net operating income from Non-Same Park facilities partially offset by increases in interest expense, preferred equity distributions and general and administrative expenses.

FFO allocable to common and dilutive shares was $31.9 million, or $1.01 per common and dilutive share for the three months ended March 31, 2012, a 23.5% per share decrease from the three months ended March 31, 2011 of $42.4 million, or $1.32 per common and dilutive share. In order to provide a meaningful period-to-period comparison, the following table summarizes the impact of non-cash adjustments which include non-cash distributions related to the redemptions of preferred equity and the gain on the below par repurchase of preferred equity on the Companyas FFO per common and dilutive share for the three months ended March31,2012 and 2011:

	For The Three Months Ended March 31,
	2012			2011		Change

FFO per common and dilutive share, before non-cash adjustments	$	1.17		$	1.09	7.3	%
Non-cash distributions related to the redemption of preferred equity		(0.16	)		a"	a"
Gain on the below par repurchase of preferred equity		a"			0.23	a"
FFO per common and dilutive share, as reported	$	1.01		$	1.32	(23.5	%)

Rental income increased $11.2 million, or 15.3%, from $73.5 million for the three months ended March 31, 2011 to $84.7 million for the three months ended March 31, 2012 as a result of a $12.3 million increase in rental income from Non-Same Park facilities, partially offset by a $1.1 million decrease from the Same Park portfolio. Net income allocable to common shareholders decreased $13.1 million, or 79.1%, from $16.6 million, or $0.67 per diluted share, for the three months ended March 31, 2011 to $3.5 million, or $0.14 per diluted share, for the three months ended March 31, 2012. The decrease in net income allocable to common shareholders was primarily due to the net impact of preferred equity transactions and increases in interest expense and preferred equity distributions, partially offset by an increase in net operating income.

Property Operations

In order to evaluate the performance of the Companyas portfolio over comparable periods, management analyzes the operating performance of stabilized properties owned and operated throughout both periods (herein referred to as aSame Parka). Effective January 1, 2012, the Company revised its Same Park definition to include all operating properties owned or acquired prior to January 1, 2010. We believe that this will provide the most meaningful perspective on how our assets are performing period to period, while not inflating comparative growth results with the continued lease-up of recently acquired assets. Operating properties that the Company acquired subsequent to January 1, 2010 or those that are not deemed to be stabilized are referred to as aNon-Same Park.a For the three months ended March31, 2012 and 2011, the Same Park facilities constitute 19.2 million rentable square feet, representing 70.7% of the 27.2 million square feet in the Companyas portfolio as of March 31, 2012. Acquired assets are generally considered stabilized when occupancy is within a range of comparable Company assets.

The following table presents the operating results of the Companyas properties for the three months ended March31, 2012 and 2011 in addition to other income and expense items affecting income from continuing operations (unaudited, in thousands, except per square foot amounts):

	For The Three Months Ended March 31,
	2012			2011			Change
Rental income:
Same Park (19.2 million rentable square feet) ⁽¹⁾	$	63,066		$	64,144		(1.7	%)
Non-Same Park (8.0 million rentable square feet) ⁽²⁾		21,662			9,368		131.2	%
Total rental income		84,728			73,512		15.3	%
Cost of operations:
Same Park		20,790			21,932		(5.2	%)
Non-Same Park		7,382			3,776		95.5	%
Total cost of operations		28,172			25,708		9.6	%
Net operating income ⁽³⁾:
Same Park ⁽¹⁾		42,276			42,212		0.2	%
Non-Same Park		14,280			5,592		155.4	%
Total net operating income		56,556			47,804		18.3	%
Other income and expenses:
Facility management fees		166			178		(6.7	%)
Interest and other income		43			94		(54.3	%)
Interest expense		(5,348	)		(1,215	)	340.2	%
Depreciation and amortization		(27,299	)		(20,754	)	31.5	%
General and administrative		(2,273	)		(1,570	)	44.8	%
Income from continuing operations	$	21,845		$	24,537		(11.0	%)

Same Park gross margin ⁽⁴⁾		67.0	%		65.8	%	1.8	%
Same Park weighted average occupancy		92.2	%		91.1	%	1.2	%
Non-Same Park weighted average occupancy		81.2	%		72.9	%
Same Park annualized realized rent per square foot ⁽⁵⁾	$	14.21		$	14.63		(2.9	%)

⁽¹⁾		See above for a definition of Same Park.
⁽²⁾		See above for a definition of Non-Same Park.
⁽³⁾		Net operating income (aNOIa) is an important measurement in the commercial real estate industry for determining the value of the real estate generating the NOI. The Companyas calculation of NOI may not be comparable to those of other companies and should not be used as an alternative to measures of performance in accordance with generally accepted accounting principles (aGAAPa).
⁽⁴⁾		Same Park gross margin is computed by dividing Same Park NOI by Same Park rental income.
⁽⁵⁾		Same Park annualized realized rent per square foot represents the annualized Same Park rental income earned per occupied square foot.

Preferred Equity Transactions

On January 18, 2012, the Company issued $230.0 million or 9.2 million depositary shares, each representing 1/1,000 of a share of the 6.45% Cumulative Preferred Stock, Series S, at $25.00 per depositary share. The Company used the proceeds from this issuance to redeem $79.6 million, or 3,182,000 depositary shares, each representing 1/1,000 of a share of the 7.20% Cumulative Preferred Stock, Series M, and $84.6 million, or 3,384,000 depositary shares, each representing 1/1,000 of a share of the 7.375% Cumulative Preferred Stock, Series O, during February, 2012. The remaining net proceeds of $58.6 million were used to reduce the balance outstanding on the Companyas credit facility.

In connection with the Series M and O redemptions, the Company reported the excess of the redemption amount over the carrying amount of $5.3 million, representing the original issuance costs, as a reduction of net income allocable to common shareholders and unit holders for the three months ended March 31, 2012.

The preferred equity transactions noted above will result in a net reduction in annual cash distributions of $1.4million.

Financial Condition

The following are key financial ratios with respect to the Companyas leverage at and for the three months ended March31,2012:

Ratio of FFO to fixed charges ⁽¹⁾	10.2x
Ratio of FFO to fixed charges and preferred distributions ⁽¹⁾	3.1x
Debt and preferred equity to total market capitalization (based on common stock price of $65.54 at March 31, 2012)	38.8	%
Available balance under the $250.0 million unsecured credit facility at March 31, 2012	$144.0 million

(1) Fixed charges include interest expense of $5.3 million.

Distributions Declared

The Board of Directors declared a quarterly dividend of $0.44 per common share on April 30, 2012. Distributions were also declared on the various series of depositary shares, each representing 1/1,000 of a share of preferred stock listed below. Distributions are payable June 28, 2012 to shareholders of record on June13,2012.

Series	Dividend Rate		Dividend Declared
Series H	7.000	%	$	0.437500
Series I	6.875	%	$	0.429688
Series P	6.700	%	$	0.418750
Series R	6.875	%	$	0.429688
Series S	6.450	%	$	0.326979

Company Information

PS Business Parks, Inc., a member of the S&P SmallCap 600, is a self-advised and self-managed real estate investment trust (aREITa) that acquires, develops, owns and operates commercial properties, primarily multi-tenant flex, office and industrial space. The Company defines aflexa space as buildings that are configured with a combination of office and warehouse space and can be designed to fit a number of uses (including office, assembly, showroom, laboratory, light manufacturing and warehouse space). As of March 31, 2012, the Company wholly owned 27.2million rentable square feet with approximately 4,400 customers located in eight states, concentrated in California (11.1 million sq. ft.), Virginia (4.2 million sq. ft.), Florida (3.7 million sq. ft.), Texas (3.3 million sq. ft.), Maryland (2.4 million sq. ft.), Oregon (1.3 million sq. ft.), Arizona (0.7 million sq. ft.) and Washington (0.5 million sq. ft.).

Forward-Looking Statements

When used within this press release, the words amay,a abelieves,a aanticipates,a aplans,a aexpects,a aseeks,a aestimates,a aintendsa and similar expressions are intended to identify aforward-looking statements.a Such forward-looking statements involve known and unknown risks, uncertainties and other factors, which may cause the actual results and performance of the Company to be materially different from those expressed or implied in the forward-looking statements. Such factors include the impact of competition from new and existing commercial facilities which could impact rents and occupancy levels at the Companyas facilities; the Companyas ability to evaluate, finance and integrate acquired and developed properties into the Companyas existing operations; the Companyas ability to effectively compete in the markets that it does business in; the impact of the regulatory environment as well as national, state and local laws and regulations including, without limitation, those governing REITs; the impact of general economic conditions upon rental rates and occupancy levels at the Companyas facilities; the availability of permanent capital at attractive rates, the outlook and actions of Rating Agencies and risks detailed from time to time in the Companyas SEC reports, including quarterly reports on Form 10-Q, reports on Form 8-K and annual reports on Form 10-K.

Additional information about PS Business Parks, Inc., including more financial analysis of the first quarter operating results, is available on the Internet. The Companyas website is [ www.psbusinessparks.com ].

A conference call is scheduled for Tuesday, May 1, 2012, at 10:00 a.m. (PDT) to discuss the first quarter results. The toll free number is (888) 299-3246; the conference ID is 70717112. The call will also be available via a live webcast on the Companyas website. A replay of the conference call will be available through May 8, 2012 at (855)859-2056. A replay of the conference call will also be available on the Companyas website.

Additional financial data attached.



PS BUSINESS PARKS, INC. CONSOLIDATED BALANCE SHEETS (In thousands, except share data)


	March 31,			December 31,
	2012			2011
	(Unaudited)

ASSETS

Cash and cash equivalents	$	6,056		$	4,980

Real estate facilities, at cost:
Land		772,933			772,933
Buildings and equipment		2,166,902			2,157,729
		2,939,835			2,930,662
Accumulated depreciation		(871,833	)		(846,799	)
		2,068,002			2,083,863
Land held for development		6,829			6,829
		2,074,831			2,090,692

Rent receivable		4,109			3,198
Deferred rent receivable		24,296			23,388
Other assets		12,699			16,361

Total assets	$	2,121,991		$	2,138,619

LIABILITIES AND EQUITY

Accrued and other liabilities	$	65,194		$	60,940
Credit facility		106,000			185,000
Term loan		250,000			250,000
Mortgage notes payable		281,874			282,084
Total liabilities		703,068			778,024

Commitments and contingencies

Equity:
PS Business Parks, Inc.as shareholdersa equity:
Preferred stock, $0.01 par value, 50,000,000 shares authorized, 26,576 and 23,942 shares issued and outstanding at March 31, 2012 and December 31, 2011, respectively		664,396			598,546
Common stock, $0.01 par value, 100,000,000 shares authorized, 24,219,901 and 24,128,184 shares issued and outstanding at March 31, 2012 and December 31, 2011, respectively		241			240
Paid-in capital		536,191			534,322
Cumulative net income		899,401			878,704
Cumulative distributions		(860,442	)		(832,607	)
Total PS Business Parks, Inc.as shareholdersa equity		1,239,787			1,179,205
Noncontrolling interests:
Preferred units		5,583			5,583
Common units		173,553			175,807
Total noncontrolling interests		179,136			181,390
Total equity		1,418,923			1,360,595

Total liabilities and equity	$	2,121,991		$	2,138,619



PS BUSINESS PARKS, INC. CONSOLIDATED STATEMENTS OF INCOME (Unaudited, in thousands, except per share amounts)


	For The Three Months Ended March 31,
	2012			2011

Revenues:
Rental income	$	84,728		$	73,512
Facility management fees		166			178
Total operating revenues		84,894			73,690
Expenses:
Cost of operations		28,172			25,708
Depreciation and amortization		27,299			20,754
General and administrative		2,273			1,570
Total operating expenses		57,744			48,032
Other income and (expenses):
Interest and other income		43			94
Interest expense		(5,348	)		(1,215	)
Total other income and (expenses)		(5,305	)		(1,121	)
Income from continuing operations		21,845			24,537
Discontinued operations:
Income from discontinued operations		a"			136
Total discontinued operations		a"			136

Net income	$	21,845		$	24,673

Net income allocation:
Net income allocable to noncontrolling interests:
Noncontrolling interests a" common units	$	1,049		$	4,901
Noncontrolling interests a" preferred units		99			(7,290	)
Total net income allocable to noncontrolling interests		1,148			(2,389	)
Net income allocable to PS Business Parks, Inc.:
Common shareholders		3,467			16,562
Preferred shareholders		17,186			10,450
Restricted stock unit holders		44			50
Total net income allocable to PS Business Parks, Inc.		20,697			27,062
	$	21,845		$	24,673

Net income per common share a" basic:
Continuing operations	$	0.14		$	0.67
Discontinued operations	$	a"		$	a"
Net income	$	0.14		$	0.67

Net income per common share a" diluted:
Continuing operations	$	0.14		$	0.66
Discontinued operations	$	a"		$	a"
Net income	$	0.14		$	0.67

Weighted average common shares outstanding:
Basic		24,157			24,685
Diluted		24,241			24,792



PS BUSINESS PARKS, INC. Computation of Diluted Funds from Operations (aFFOa) and Funds Available for Distribution (aFADa) (Unaudited, in thousands, except per share amounts)


	For The Three Months Ended March 31,
	2012			2011
Computation of Diluted Funds From Operations (aFFOa) ⁽¹⁾:

Net income allocable to common shareholders	$	3,467		$	16,562
Adjustments:
Depreciation and amortization		27,299			20,859
Net income allocable to noncontrolling interests a" common units		1,049			4,901
Net income allocable to restricted stock unit holders		44			50
FFO allocable to common and dilutive shares	$	31,859		$	42,372

Weighted average common shares outstanding		24,157			24,685
Weighted average common OP units outstanding		7,305			7,305
Weighted average restricted stock units outstanding		113			72
Weighted average common share equivalents outstanding		84			107
Total common and dilutive shares		31,659			32,169

FFO per common and dilutive share	$	1.01		$	1.32

Computation of Funds Available for Distribution (aFADa) ⁽²⁾:

FFO allocable to common and dilutive shares	$	31,859		$	42,372

Adjustments:
Recurring capital improvements		(1,116	)		(856	)
Tenant improvements		(7,968	)		(4,752	)
Lease commissions		(1,269	)		(1,480	)
Straight-line rent		(1,136	)		(281	)
Non-cash stock compensation expense		1,266			458
In-place lease adjustment		159			209
Tenant improvement reimbursements, net of lease incentives		(170	)		(195	)
Non-cash distributions related to the redemption of preferred equity		5,260			a"
Gain on repurchase of preferred equity, net of issuance costs		a"			(7,389	)
FAD	$	26,885		$	28,086

Distributions to common and dilutive shares	$	13,907		$	14,114

Distribution payout ratio		51.7	%		50.3	%

⁽¹⁾		Funds From Operations (aFFOa) is computed in accordance with the White Paper on FFO approved by the Board of Governors of the National Association of Real Estate Investment Trusts (aNAREITa). The White Paper defines FFO as net income, computed in accordance with GAAP, before depreciation, amortization, gains or losses on asset dispositions, net income allocable to noncontrolling interests a" common units, net income allocable to restricted stock unit holders and nonrecurring items. FFO should be analyzed in conjunction with net income. However, FFO should not be viewed as a substitute for net income as a measure of operating performance or liquidity as it does not reflect depreciation and amortization costs or the level of capital expenditure and leasing costs necessary to maintain the operating performance of the Companyas properties, which are significant economic costs and could materially impact the Companyas results from operations. Other REITs may use different methods for calculating FFO and, accordingly, the Companyas FFO may not be comparable to other real estate companies.

⁽²⁾		Funds Available for Distribution (aFADa) is computed by adjusting consolidated FFO for recurring capital improvements, which the Company defines as those costs incurred to maintain the assetsa value, tenant improvements, lease commissions, straight-line rent, stock compensation expense, impairment charges, amortization of lease incentives and tenant improvement reimbursements, in-place lease adjustment and the effect of redemption/repurchase of preferred equity. Like FFO, the Company considers FAD to be a useful measure for investors to evaluate the operations and cash flows of a REIT. FAD does not represent net income or cash flow from operations as defined by GAAP.

N@N

PS Business Parks, Inc. Reports Results for the First Quarter Ended March 31, 2012