“Missing middle” housing has many definitions in housing debates, including that cities are
missing housing at a certain middle price range; or missing middle building sizes like duplexes and multiplexes; or missing middle unit sizes like two-bedroom units and larger. The last point is especially relevant for families in the District of Columbia where only 32% of multifamily apartment stock is suitable for households with two or more people, which may include families with at least one child in the home.