R4 Infill Zoning Code - New York City
What is an R4 Infill Zoning District?
On a block entirely within an R4 or R5 district (without a suffix), optional regulations may be used to develop infill housing in predominantly built-up areas. Infill regulations may be used if at least 50% of the area of the block is occupied by zoning lots developed with buildings, and the lot does not exceed 1.5 acres. However, infill regulations may not be used to redevelop a lot occupied by one- or two-family detached or semi-detached houses unless the blockfront is predominantly developed with attached or multi-family housing.
On sites that qualify for infill regulations, the higher Floor Area Ratio (FAR) of 1.35 and lot coverage of 55% for R4 Infill housing, as well as more relaxed parking requirements, permit developments with greater bulk and more dwelling units than are otherwise permitted in R4 districts. Infill regulations typically produce three-story buildings with three dwelling units and two parking spaces - one in a ground-floor garage and the other in the driveway. Infill regulations may also produce small apartment buildings.
Height and setback regulations for R4 Infill housing are the same as for R4 districts. Front yards must be at least 18 feet deep to prevent cars parked in the front driveway from jutting onto the sidewalk. The maximum street wall length for a building on a single zoning lot is 185 feet. Off-street parking is required for two-thirds of the dwelling units.
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