Ecocity Builders is a 501c non profit located in Oakland, California that provides advocacy, consulting, and education in sustainable city planning with a focus on access by proximity and pedestrian-oriented development. Ecocity Builders also implements urban design projects utilizing a large network of alliances with city governments, businesses and NGOs. Ecocity Builders' approach is based the work of founder Richard Register, an American artist, peace activist and urban theorist.