Liberty Property Trust is a nationally recognized leader in the design and development of facilities which are environmentally responsible, economically efficient, and which strive to promote healthy living and work environments. As a participant in the Leadership in Energy and Environmental Design - LEED - Green Building Rating System of the U.S. Green Building Council ("USGBC"), the national standard for developing high-performance, sustainable office buildings, Liberty's developments have earned awards for environmental sensitivity and achieved economic returns not only in the development phase but throughout the operating phase to benefit the tenants that occupy these spaces. Liberty is a Platinum sustaining sponsor of the Delaware Valley Green Building Council, and during the past five years or so, Liberty has completed or initiated the construction of more than 3.1 million square feet of green space designed for USGBC LEED certification across the United States.

Liberty has been called "the poster child for commercial green development" by Sandy Wiggins, director of the U.S. Green Building Council, and was awarded the Council's 2006 LEED Award for Corporate Leadership in recognition of Liberty's achievements, exceptional vision, leadership, and commitment to the evolution of green building design and construction.

Liberty's local and regional projects include a diverse mix of developments and sustainable master planned communities which exemplify the types of extraordinary workplace environments that can be created when sustainable design is the keystone for development:

• One Crescent Drive, an 84,000 square foot, four-story commercial office buildinglocated in the Navy Yard Corporate Center in Philadelphia, PA, was constructed on an urban brownfield site and earned a Platinum LEED certification, the highest such designation available. The building is also the first LEED CS Platinum building in the world;
• The Comcast Center, a 1.2 million square foot, 58-story skyscraper in Philadelphia, PA, has been designed for LEED certification, and when completed, the building will be one of the tallest urban green office buildings in the United States;
• The Plaza at PPL, a 280,000 square foot, eight story, Class AA facility located in Allentown, PA, earned a LEED Gold certification, the Urban Land Institute's 2004 Award for Excellence and the American Institute of Architect's 2004 Top Ten Green Buildings Award;
• 420 Delaware Drive, a new 75,000 square foot, three-story Class A office building in Fort Washington, PA, earned a LEED Silver certification for smart growth and is part of Liberty's quality planned development which is transforming this tremendously visible and well-located old industrial park
  
• The 777 Township Line Road project redeveloped an existing manufacturing facility in Yardley, PA, into a modern, 110,000 square foot office development offering its tenants water efficiencies that achieve 20% savings. The project is targeted to achieve LEED Silver certification;
• 3701 Corporate Parkway is a new 75,000 square foot office building in Center Valley, PA, designated to achieve certification under LEED and the Fundamental Building Systems Commission to ensure that sustainable design systems are operating at maximum efficiency one year after move-in date;
• Liberty's 330 Fellowship Drive project in Mt. Laurel, NJ, replaced an antiquated building with a 108,000 square foot new office development designed to achieve LEED Gold certification for responsible redevelopment and creating "smart", open green space;
• The Great Valley Corporate Center in Malvern, PA, encompasses five million square feet of
  office and research and development space spread over 700 acres. In 2004, the Building
  Owners and Mangers Association awarded the Great Valley Corporate Center the Office Building of the Year award for Best International Suburban Office Park;
• The Navy Yard Corporate Center in Philadelphia, PA, part of a 1,200 acre de-commissioned U.S. Naval Base, is being redeveloped by Liberty under a comprehensive master plan jointly developed in public/private partnership with Liberty/Synterra LP and the Philadelphia Industrial Development Corporation. Liberty is developing the 70-acre Navy Yard Corporate Center in a joint venture with Synterra Partners and intends to register each newly constructed building for USGBC LEED certification; and
• The Lehigh Valley Corporate Center, Bethlehem, PA, is a 175-acre, master-planned development that will provide 1.2 million square feet of Class A office and flex space with almost 50 acres dedicated to green space.

Sustainability Narrative

Liberty's local and regional projects exemplify Liberty's commitment to sustainable development in areas such as energy conservation and resource efficiency, waste reduction, pollution prevention, sustainable healthy employment and green building elements. Each of these projects have .positively impacted the Philadelphia region by 1) using innovative approaches to reduce waste and air emissions during construction and/or renovation, 2) utilizing technology to increase each development's overall energy efficiency and resource conservation, thereby reducing waste and consumption of precious resources while minimizing environmental impacts, and 3) demonstrating how the promotion of healthy lifestyles may successfully be incorporated into the design and operation of commercial office buildings. The green aspects of Liberty's development process from initial design through construction and building operation reflect Liberty's creative approach to environmentally-sensitive development and the thoughtful manner in which Liberty designs and constructs workplaces in our community. Each of these local and regional projects also demonstrate Liberty's leadership in moving beyond local building code requirements in construction in order to achieve a superior overall
commercial office space that offers reduced operating costs and associated environmental impacts for
years to come.

Results

The positive impact of Liberty's approach to sustainable development can be quantified in many ways from construction waste management techniques to economic efficiency to pollution prevention to improvements in local and regional environmental quality, and more. Recycling construction demolition waste at the project site diverts waste from overcrowded landfills and reduces transportation-related emissions. In addition, maximum use of daylight in a building's design, the use of automated light dimming systems, occupancy sensors, high performance low-e glass and high performance HVAC systems can result in economic impacts of a 6% to 25% increase in employee performance and 23% to 60% savings in energy costs. These energy efficiencies also lead to less local and regional environmental impacts and less demand on the existing public utility infrastructures. The reuse of urban space, when possible, saves greenfields from development and allows building occupants to take advantage of existing infrastructure and access to public transportation. Liberty's approach to sustainable development results in healthy work environments for the buildings occupants, reduces on-going operating expenses, realizes benefits to local and regional environmental quality and displaces the myth that environmentally friendly, green buildings are not economically feasible projects valued by the market.