In 2009, Brazil launched a low-cost housing programme to fill a deficit of seven million homes. Minha Casa – Nossa Cidade!: Innovating Mass Housing for Social Change in Brazil, produced by the MAS Urban Design Programme, examines the project at a critical time and presents ways to improve it. Three chapters review its history and implementation, the ingenuity of Brazilian architecture, and present proposals for housing based not on private ownership but on the greater vision for the city as a common project.