This chapter examines the experience of construction unions and community organizations as they enter into strategic alliances to create new markets in energy efficient systems. I focus on two recent policy initiatives: PlaNYC for the retrofitting of public and commercial properties in New York City, and Green Jobs/Green New York (GJ/GNY) for the retrofitting of non-commercial residential properties in the rest of the city and the state. Construction unions aligned along these two policy paths, with the Laborers’ International Union of North America (LIUNA) focusing its efforts on GJ/GNY, and other building trades and the building services union concentrating their efforts on the PlaNYC initiative. Labour was involved in the implementation of both initiatives, and played a particularly active role in forging statewide policy. At the city level, the mayor’s office primarily drove policy in this area, with initial efforts started during the Bloomberg administration.