R-2 zoning refers to a traditional zoning category in which apartment complexes are permitted to be constructed along with dwellings and duplexes. This category differs from R-1 zoning by including multifamily buildings. The traditional R-1, R-2, and C-1 zoning structure, also referred to Euclid or pyramid zoning, was upheld by a landmark 1926 U.S. Supreme Court decision, but is no longer in widespread use.
Residential development in R2 districts is limited exclusively to single-family detached houses. Floral Park in Queens, parts of City Island and Riverdale in the Bronx, and Westerleigh on Staten Island’s north shore are typical R2 districts.