Solarize Portland was a successful neighborhood-led group buying program for residential solar installations that launched in 2009. It was initially developed by Southeast Uplift, a neighborhood coalition in the Mt. Tabor area of Portland. As interest spread to other areas of the city, Portland’s Bureau of Planning amd Sustainability (BPS) provided funding and staff resources to help the neighborhoods organize and build their own local programs. Neighbors in a participating community received technical assistance, went through a competitive process, selected a contractor and bought solar energy systems as a group, thus taking advantage of bulk purchasing power. Throughout the program, this led to savings of 15-20 percent and helped drive innovation in the regional solar market. With the addition of state tax credits and cash incentives, homeowners who participated in the program could recover up to 80% of the cost of solar installations.