Exhibit 99.1

LIBERTY PROPERTY TRUST ANNOUNCES

SECOND QUARTER 2013 RESULTS

Malvern, PA, July 23, 2013 — Liberty Property Trust reported that funds from operations available to common shareholders (diluted) (“FFO”) for the second quarter of 2013 was $0.66 per share, compared to $0.63 per share for the second quarter of 2012. Funds from operations for the second quarter of 2013 include termination fees of $777,000. Second quarter results also include $2.3 million of acquisition-related expenses and the write-off of $1.2 million of preferred unit origination costs.

FFO per share for the six-month period ended June 30, 2013 was $1.31, compared to $1.31 per share for the same period in 2012.

Net income per common share (diluted) was $0.33 per share for the quarter ended June 30, 2013, compared to $0.29 per share (diluted) for the quarter ended June 30, 2012. Net income for the six-month period ended June 30, 2013 was $0.93 per share, compared with $0.61 per share for the same period in 2012. Net income for the six month period ended June 30, 2013 includes $0.45 per share in gains in property dispositions compared to $0.04 per share in the same period in 2012.

“Going into 2013, we noted that markets were firming very slowly, but we expected pent-up demand to put positive pressure on our markets as the year progressed. In the second quarter we saw this begin to happen, as some of the opportunities we have been working on for months became signed deals,” said Bill Hankowsky, chairman and chief executive officer. “In addition, we are encouraged to see market fundamentals, including occupancy and rents, continue to strengthen.”

Portfolio Performance

Leasing: At June 30, 2013, Liberty’s in-service portfolio of 80.6 million square feet was 92.8% occupied, compared to 92.6% at the end of the first quarter. During the quarter, Liberty completed lease transactions totaling a company record 7.1 million square feet of space.

Same Store Performance: Property level operating income for same store properties increased by 1.7% on a cash basis and 0.4% on a straight line basis for the second quarter of 2013 compared to the same quarter in 2012.

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Liberty Property Trust 2Q 2013 Results

Real Estate Investments

Acquisitions: Liberty acquired one property during the quarter, an office building in Washington DC, for $133.5 million.  The property contains 291,000 square feet of leasable space and is 77.4% leased at a current yield of 5.9% and a stabilized yield of 6.2%.

Subsequent to quarter-end, Liberty purchased a 594,000 square foot distribution building in Phoenix, AZ for $27.9 million. The property is newly-built and is currently vacant.

Development Pipeline: In the second quarter, Liberty brought one development property into service for a total investment of $28.1 million. The property contains 139,000 square feet of leasable space and is 100% occupied at a yield of 7.5%.

During the quarter, Liberty began development of five properties for a projected investment of $139.2 million. The properties include:

·                  Shippensburg, PA: a $92.7 million, 1.7 million square foot build-to-suit distribution facility, which is 100% pre-leased;

·                  Miami, FL: a  $13.8 million, 148,000 square foot distribution building;

·                  Hanover, MD: two distribution buildings totaling 244,000 square feet for $24.8 million

·                  Greer, SC: a 156,000 square foot distribution building for $8.0 million, which is 33% pre-leased.

Subsequent to quarter-end, Liberty executed a lease for 550,800 square feet at 40 Logistics Drive in Carlisle, PA, a 972,000 square foot building currently under construction and scheduled to be delivered in the third quarter of this year. The lease commences August 15, 2013.

Capital Activities and Balance Sheet Management

Property Sales: During the second quarter, Liberty sold six operating properties, which contained 498,000 square feet of leasable space for $51.4 million. The properties were 34.3% leased at the time of the sale.

Common Share Sales: During the second quarter of 2013, Liberty sold 1.2 million shares under the company’s continuous equity program. Proceeds of $50.4 million were used to repay borrowings under the Company’s unsecured credit facility and for general corporate purposes.

Preferred Unit Redemption: Liberty redeemed Preferred Units as follows: $20.0 million of its outstanding 7.00% Series E Cumulative Redeemable Preferred Units at par, $17.5 million of its 6.65% Series F Cumulative Redeemable Preferred Units at par and $27.0 million of its outstanding 6.70% Series G Cumulative Redeemable Preferred Units at par.

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About the Company

Liberty Property Trust (NYSE:LRY) is a leader in commercial real estate, serving customers in the United States and United Kingdom, through the development, acquisition, ownership and management of superior office and industrial properties. Liberty’s 81 million square foot portfolio includes 662 properties which provide office, distribution and light manufacturing facilities to 1,700 tenants.

Additional information about the Company, including Liberty’s Quarterly Supplemental Package with detailed financial information is available in the Investors section of the Company’s web site at www.libertyproperty.com. If you are unable to access the web site, a copy of the supplemental package may be obtained by contacting Liberty by phone at 610-648-1704, or by e-mail to jleonard@libertyproperty.com.

Liberty will host a conference call during which management will discuss second quarter results, on Tuesday, July 23, 2013, at 1 p.m. Eastern Time.  To access the conference call, please dial 855-277-7530. The passcode needed for access is 18466039. A replay of the call will be available until August 23, 2013, by dialing 1-855-859-2056 using the same passcode as above. The call can also be accessed via the Internet on the Investors page of Liberty’s web site at www.libertyproperty.com.

The statements contained in this press release may include forward-looking statements within the meaning of the federal securities law.  Although Liberty believes that the expectations reflected in such forward-looking statements are based on reasonable assumptions, it can give no assurance that its expectations will be achieved.  As forward-looking statements, these statements involve risks, uncertainties and other factors that could cause actual results to differ materially from the expected results.  These factors include, without limitation, the uncertainties affecting real estate businesses generally (such as entry into new leases, renewals of leases and dependence on tenants’ business operations), risks relating to our ability to maintain and increase property occupancy and rental rates, the financial condition of tenants, the uncertainties of real estate development and construction activity, the costs and availability of financing, the effects of local economic and market conditions, regulatory changes, potential liability relative to environmental matters and other risks and uncertainties detailed in the company’s filings with the Securities and Exchange Commission.  The company assumes no obligation to update or supplement forward-looking statements that become untrue because of subsequent events.

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Liberty Property Trust

Statement of Operations

June 30, 2013

(Unaudited and in thousands, except per share amounts)

Liberty Property Trust

Statement of Funds From Operations

June 30, 2013

(Unaudited and in thousands, except per share amounts)

The Company believes that the calculation of Funds from operations is helpful to investors and management as it is a measure of the Company’s operating performance that excludes depreciation and amortization and gains and losses from property dispositions.  As a result, year over year comparison of Funds from operations reflects the impact on operations from trends in occupancy rates, rental rates, operating costs, development activities, general and administrative expenses, and interest costs, providing perspective not immediately apparent from net income.  In addition, management believes that Funds from operations provides useful information to the investment community about the Company’s financial performance when compared to other REITs since Funds from operations is generally recognized as the standard for reporting the operating performance of a REIT.  Funds from operations available to common shareholders is defined by NAREIT as net income (computed in accordance with generally accepted accounting principles (“GAAP”)), excluding gains (or losses) from sales of property, plus depreciation and amortization, and after adjustments for unconsolidated partnerships and joint ventures. Funds from operations available to common shareholders does not represent net income or cash flows from operations as defined by GAAP and does not necessarily indicate that cash flows will be sufficient to fund cash needs. It should not be considered as an alternative to net income as an indicator of the Company’s operating performance or to cash flows as a measure of liquidity. Funds from operations available to common shareholders also does not represent cash flows generated from operating, investing or financing activities as defined by GAAP.

Liberty Property Trust

Balance Sheet

June 30, 2013

(Unaudited and in thousands, except share and unit amounts)