The NYC Department of Housing and Preservation Development's NYC Green House Program is a homeowner's tool kit for saving money by going green. It is a useful resource for homeowners who want to green their home.
From NYC Green House: "NYC Green House is a program developed by the NYC Department of Housing Preservation and Development in conjunction with the Community Preservation Corporation and in collaboration with public and private partners. HPD is committed to supporting safe, quality affordable housing, promoting strong neighborhoods, and encouraging sustainable development as an economically viable solution for building owners."