Established by the U.S. Green Building Council, the Leadership in Energy and Environmental Design (LEED) Green Building Rating System encourages building development and facility management professionals to use Green Building practices and materials to create and maintain environmentally sustainable buildings.

The LEED for Commercial Interiors is the recognized rating system for certifying high-performance green interiors that support healthier more cost and energy efficient work places and reducing environmental footprint.

By using nontoxic, recycled and sustainbable material, green building practices and continuing to support green facility practices such as the Center's recycling programs, computer area controlled HVAC systems, and green electricity sourcing, Thoreau Center New York and The Nonprofit and Philanthropy Center at 55 Exchange Place have received their LEED Commercial Interiors  (CI) Silver Certification.