Cassidy Turley Leads Process to Achieve LEED® Gold Certification for Dulles Corner Gateway in Herndon, VA

First LEED for Existing Buildings: O&M Certification in Herndon

Published on August 15, 2011

Washington, DC – Cassidy Turley announced today that Dulles Corner Gateway has achieved the U.S. Green Building Council (USGBC) Leadership in Energy and Environmental Design for Existing Buildings: Operations & Maintenance (LEED for Existing Buildings: O&M) Gold certification.  LEED is an internationally recognized certification system that measures how well a building or community performs across all the metrics that matter most: energy savings, water efficiency, CO2 emissions reduction, improved indoor environmental quality, and stewardship of resources and sensitivity to their impacts.  Located at 2325 Dulles Corner Boulevard in Herndon, VA, Dulles Corner Gateway is owned by Deka Immobilien Investment GmbH and managed by Cassidy Turley.

“The achievement of LEED certification at Dulles Corner Gateway is an outstanding milestone that has made a valuable impact on the Northern Virginia office market and further demonstrates the value of achieving a LEED EB certification in multi-tenant office buildings,” commented Evan Tyroler, Vice President of Sustainability Services with Cassidy Turley.  “As a market leader in implementing sustainability practices, Cassidy Turley has completed many LEED projects throughout the country.  This achievement could not have been possible without the tremendous efforts from the tenants and onsite Cassidy Turley management team during this exciting and educational process,” he continued.

“This is the second LEED EB project that Cassidy Turley has been able to partner with Deka Immobilien Investment GmbH on and we look forward to continuing this relationship with an owner who is so dedicated to improving our built environment,” commented William A. Grillo, Senior Managing Director of Property Management for Cassidy Turley. 

“Buildings are a prime example of how human systems integrate with natural systems,” said Rick Fedrizzi, President, CEO & Founding Chair, U.S. Green Building Council. “The Dulles Corner Gateway project efficiently uses our natural resources and makes an immediate, positive impact on our planet, which will tremendously benefit future generations to come.”

Dulles Corner Gateway is an 11-story, multi-tenant office building proximate to Dulles International Airport, and is the first LEED for Existing Buildings: O&M project in the suburban submarket of Herndon.  Cassidy Turley handled the day-to-day project management required to achieve the building’s LEED certification.  Highlights of the project include: 

  • Full building retro-commissioning and implementation of select energy conservation measures reducing the buildings energy consumption by 13.8 percent and CO2 emissions by over 318.53 metric tons
  • As a result of these energy conservation initiatives the building was awarded the EPA’s prestigious ENERGY STAR, the national symbol for superior energy efficiency and environmental protection
  • Upgrades to indoor plumbing fixtures, process water controls and the irrigation system led to significant reductions in potable water consumption
  • Achieved a targeted diversion rate of 100 percent electronic equipment and durable goods from entering the main waste stream

About U.S. Green Building Council
The Washington, D.C.-based U.S. Green Building Council is committed to a prosperous and sustainable future for our nation through cost-efficient and energy-saving green buildings.
With a community comprising 80 local affiliates, more than 18,000 member companies and organizations, and more than 155,000 LEED Professional Credential holders, USGBC is the driving force of an industry that is projected to contribute $554 billion to the U.S. gross domestic product from 2009-2013. USGBC leads an unlikely diverse constituency of builders and environmentalists, corporations and nonprofit organizations, elected officials and concerned citizens, and teachers and students.  Buildings in the United States are responsible for 39% of CO2 emissions, 40% of energy consumption, 13% water consumption and 15% of GDP per year, making green building a source of significant economic and environmental opportunity. Greater building efficiency can meet 85% of future U.S. demand for energy, and a national commitment to green building has the potential to generate 2.5 million American jobs.

About LEED®
The U.S. Green Building Council's LEED green building certification system is the foremost program for the design, construction and operation of green buildings. The U.S. Green Building Council’s LEED rating system is the preeminent program for the design, construction and operation of green buildings. 35,000 projects are currently participating in the LEED system, comprising over 5.6 billion square feet of construction space in all 50 states and 91 countries. By using less energy, LEED-certified buildings save money for families, businesses and taxpayers; reduce greenhouse gas emissions; and contribute to a healthier environment for residents, workers and the larger community. USGBC was co-founded by current President and CEO Rick Fedrizzi, who spent 25 years as a Fortune 500 executive. Under his 15-year leadership, the organization has become the preeminent green building, membership, policy, standards, influential, education and research organization in the nation. For more information, visit

About Cassidy Turley
Cassidy Turley is a leading commercial real estate services provider with 3,200 professionals in 60 offices nationwide. The company represents a wide range of clients—from small businesses to Fortune 500 companies, from local non-profits to major institutions.  The firm completed transactions valued at $17 billion in 2010, manages 430 million square feet on behalf of private, institutional and corporate clients and supports over 25,000 domestic corporate services locations. Cassidy Turley serves owners, investors and occupiers with a full spectrum of integrated commercial real estate services—including capital markets, tenant representation, corporate services, project leasing, property management, project and development services, and research and consulting. In 2010, the firm enhanced its global service delivery outside of North America through its partnership with GVA. Please visit for more information about Cassidy Turley.

Maureen Wheeler

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