In October 2005, New York City passed Local Law 86, which will require most of the City’s municipal structures, including DDC’s, to achieve LEED certification. As of early 2008, more than 60 projects incorporating sustainable elements are in design, under construction or have been built. Projects vary by type, size, client group and specific environmental goals, but share a commitment to energy conservation, commissioning, sustainable site/landscape practices, construction waste management and careful materials selection. As a group, the projects have been particularly successful in energy conservation, using innovative daylighting strategies, as well as creative system design. Emphasis has been placed on urban environmental issues particularly relevant to New York City – energy capacity limitations, urban heat island issues, storm water management, increasing difficulty of waste disposal, and City occupants who spend significant time indoors.