Of the roughly 950,000 single-family and 470,000 multifamily homes that started construction in 2023, 49,000 (30,000 single-family and 19,000 multifamily) were built in age-restricted communities, according to NAHB tabulation of data from the Census’s Survey of Construction. A residential community can be legally age-restricted, provided it conforms to one of the set of rules specified in the Housing for…