The Green Building Leaders Project (www.greenbuildingleaders.ca) is bringing together a broad coalition – municipalities, developers, home owners, real estate agents, contractors, utilities, environmental organizations, and the provincial government – to work collaboratively on the design and implementation of new renewable energy and energy efficiency building policies to help address the greenhouse gas emissions from new and existing buildings. The project is an opportunity for leading local governments to advance progressive green building regulations that will help their communities reduce emissions while setting the stage for broader change in the province.