The Inclusionary Zoning (IZ) program supports the District’s and the DC Department of Housing and Community Development (DHCD’s) missions to produce and preserve affordable housing opportunities by requiring new developments with 10 or more dwelling units or proposing new gross floor area that would result in 10 or more dwelling units to include a percentage of affordable units (approximately 8 percent to 10 percent of the gross residential floor area) in exchange for a density bonus (up to 20 percent gross floor area) beyond what is allowed under existing zoning regulations.