R4B Zoning in NYC
R4B is a low-rise, one- and two-family zoning district in New York City. It allows a residential FAR of 1.0 and buildings up to 25 ft tall. 15,447 tax lots carry the R4B designation, 94% of them in Queens. Their average built FAR is 0.75, against 1 allowed.
R4B zoning rules at a glance
| Rule | Value | Note |
|---|---|---|
| Max residential FAR | 1.0 | After City of Yes (Dec 2024). ZR 23-21. |
| FAR, qualifying residential site | 1.5 | Sites of 5,000 sq ft or more meeting ZR 12-10; PLUTO cannot confirm it, check the lot. |
| Street wall / base height | 25 ft | Flat-roofed forms (ZR 23-42). |
| Max building height | 25 ft | |
| Front yard | 5 ft | ZR 23-32. |
| Side yard | 5 ft each side | Where the building is not attached. |
| Lot coverage | 60% interior, 80% corner | ZR 23-36. |
| Building types | Attached and detached |
R4B lots in the data
Where R4B lots are
Browse by area in the neighborhood index.
R4B zoning questions
What is the maximum FAR in R4B?
Residential FAR in R4B is 1.0 (ZR 23-21). Floor area on a lot is that ratio times the lot area.
How tall can a building be in R4B?
R4B buildings reach 25 feet at most, with a 25-foot street wall and a flat roofline (ZR 23-42).
How built-out are R4B lots?
The average R4B lot is built to 0.75 FAR against an average maximum residential FAR of 1 in MapPLUTO 26v2, so about 25% of allowed floor area is unused on the average lot. Lots vary; open any one on the map.
Does City of Yes affect R4B lots?
15,447 of 15,447 R4B lots (100%) flag as touched by at least one City of Yes for Housing Opportunity program in NYRezone's screening. Eligibility is lot by lot; verify each one.
Look up any R4B lot
The NYRezone NYC zoning map shows zoning, buildable area and unused floor area for every parcel. No login.
Related R4 districts
Sources & freshness
Data: NYC MapPLUTO 26v2 (checked Sept. 28, 2026); compiled by NYRezone. Parcel counts and built-versus-allowed FAR come from that release. Rule values come from the NYC Zoning Resolution as amended by City of Yes for Housing Opportunity (Dec 2024). This is orientation, not legal advice: confirm a lot with the Department of City Planning before you act on it.