NYC Zoning Handbook:
Residential Districts: R5B

R5B districts are mapped to preserve the traditional three- story rowhouse and promote new rowhouse development. Detached and semi-detached houses and zero lot line buildings are also permitted. R5B districts are mapped in Windsor Terrace in Brooklyn and along Northern Boulevard in Bayside, Queens.

Although similar to R4B districts, R5B districts permit greater density and a higher FAR (1.35)—the attic allowance does not apply—which typically produce bulkier three-story rowhouses and garden apartments with more dwelling units. In order to preserve the existing streetscape, the maximum street wall height is 30 feet, above which the building envelope slopes to a maximum roof height of 33 feet. The minimum depth of the front yard is five feet. If the front yards of the adjacent zoning lots are deeper than five feet, the front yard must be at least as deep as one of the adjacent front yards but not exceed the depth of the other yard. Curb cuts are prohibited on lots less than 40 feet wide. Front yard parking is prohibited. If parking is grouped, space must be provided for at least 66 percent of the dwelling units.

Basic Data

R5B: General residence district

Minimum lot size:
Detached, single- or two-family: 2,375 square feet lot area; 25 foot lot width
Other: 1,700 square feet; 18 foot lot width
Maximum FAR: 1.35
Maximum lot coverage: 55%
Minimum lot area per DU: 666 square feet
Maximum DUs per acre: 65
Front yard: 5 feet minimum
Side yards:
Detached (2 required): 8 feet total (minimum)
Zero lot line (1 required): 8 feet minimum
Semi-detached: 4 feet minimum (8 feet minimum between buildings)
Other: none required
Maximum building height: 33 feet;
Maximum street wall height 30 feet
Required parking: One space per dwelling unit or 66% of dwelling units if grouped

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