MALVERN, PA - June 30, 2008 - Liberty Property Trust (NYSE:LRY), which owns and manages more than 74 million square feet of office and industrial space in the United States and United Kingdom, has been named the recipient of the CoreNet Global 2008 Sustainable Leadership Award for Design & Development. The award celebrates commercial leaders dedicated to sustainable design and development.

"What makes this year's nominees so exciting is that sustainability has truly become part of their DNA," commented CoreNet Global Chairman David Harris. "Corporate real estate and the workplace are raising the bar across the industry - meaning more innovation and dedicated resources to building truly sustainable environments."

Liberty earned the award for its commitment to sustainable design and development as exemplified by the LEED Gold warehouse and distribution center Liberty developed in Sturtevant, Wisconsin for JohnsonDiversey, Inc. (JDI) in 2007. The project showcased how Liberty integrated sustainability with design excellence while meeting both the developer's and the tenant's objectives for the project.

"The JDI project is a tremendous example of how a developer and a tenant can work together for common business goals while putting the environment first," said Bill Hankowsky, CEO and Chairman of Liberty Property Trust.

Liberty was honored by CoreNet along with the Utah Park Service for the Escalante Science Center and Perkins+Wills' Sustainable Design Initiative Strategic Plan and the Green Operations Plan. Liberty was also recognized for leadership in sustainable design as illustrated by the same project by the National Association of Industrial and Office Properties in late 2007, when NAIOP presented the developer with its third annual "Green Development Award" in the build-to-suit category.

JohnsonDiversey Distribution Center
Liberty developed the 552,000 square foot warehouse and distribution center on time and on budget. Located on 38 acres in Renaissance Business Park near Racine, WI, the property features a wide range of sustainable design elements, including:

• A white thermoplastic polyolefin (TPO) roof to reduce solar heat gain
  

• Reduced water use by 30% beyond State of Wisconsin building code
  
• Reduced energy use by more than 40% beyond State of Wisconsin building code
  
• Open space for vegetation - with 70% of the project site using native plants
  
• Low-emitting materials for construction, including interior paints, adhesives, sealants and carpeting to maintain air quality
  
• Various lighting systems using fluorescent lights and occupancy sensors
  
• Significant waste recycling program that recycled 941 of 964 tons of waste during construction
  
• Building materials featured more than 20 percent recycled content

The tenant, JohnsonDiversey, is a global leader in cleaning and hygiene products.
The general contractor for the project was Riley Construction.

Liberty and LEED
In 2006, Liberty also earned a U. S. Green Building Council Award for Corporate Leadership which is awarded to outstanding leaders in green building that demonstrate exceptional vision, leadership, and commitment to the evolution of green building design and construction. Liberty has 6.8 million square feet of LEED and BREEAM (British Real Estate Environmental Assessment Method) projects completed or under construction throughout the US and UK.

Included in the list of Liberty's 35 sustainable development projects include the just-opened 58-story Comcast Center office tower in Philadelphia (the tallest green building in the nation) and One Crescent Drive, the first developer-owned LEED Platinum office building in the world.

About Liberty Property Trust
Liberty Property Trust (NYSE:LRY), headquartered in Malvern, PA, is dedicated to enhancing people's lives through extraordinary work environments. The real estate investment trust (REIT) serves customers in the United States and United Kingdom through the development, acquisition, ownership and management of superior office and industrial properties.

Liberty's 74 million square foot portfolio offers exceptional locations and flexible design to more than 2,100 tenants at 700 office, distribution and light manufacturing facilities. The company is a leader in the development of high performance green buildings. For more information visit www.libertyproperty.com.

Contact:
Christina Taylor
Liberty Property Trust
610/722-4167

Robbie Tarpley Raffish
a.s.a.p.r.
410/883-2000