The Inclusionary Housing Program (IHP), also known as Inclusionary Zoning, is designed to preserve and promote affordable housing within neighborhoods where zoning has been modified to encourage new development. The IHP consists of two programs:
Voluntary Inclusionary Housing (VIH), enacted in 1987, where applicable, enables a development to receive a density bonus in return for the new construction, substantial rehabilitation, or preservation of permanently affordable housing.
Mandatory Inclusionary Housing (MIH), enacted in March 2016, requires a share of new housing in medium- and high-density areas that are rezoned to promote new housing production—whether rezoned as part of a city neighborhood plan or a private rezoning application—to be permanently affordable.