This designation typically permits medium-density residential development. The allowed housing types often include a mix of single-family homes, duplexes, townhouses, and low-rise apartment buildings. For example, a parcel designated as such might allow the construction of several townhouses on a single lot that would only accommodate one single-family dwelling under a less intensive zoning designation.
Its significance lies in its ability to increase housing density and affordability compared to single-family zoning. This can contribute to a more diverse housing market and potentially lower housing costs. Historically, these zoning codes evolved to address increasing population densities and the need for more efficient land use within urban and suburban areas.