Today multi-family housing is developed through a spreadsheet mentality geared toward satisfying investors and banks, producing a limited set of options for families who want to live in the center of the city. By bringing back a spatial model for the design and development of housing, architecture is a key player in producing dense urban environments that are spatially-rich, and invested in their urban locales, resonating with middle-income families. The Corrugated Edge is the best spatial model for producing housing that is affordable and spatially rich.