As-of-RightPrototype 0.3

New York City

Every tax lot in the five boroughs. Search an address, or zoom in and tap a lot.

Tap a borough to zoom in, then tap any lot to open it.

Block

Tap lots to add or remove them

Base Above setback Neighbors Zoning envelope

Drag to orbit, pinch or scroll to zoom. Neighbors are approximate, sized from city records of each lot’s building area and stories.

Section A–A

Rezoning upside

Max zoning floor area

Solid bar: market-rate rules. Hatched extension: with MIH/UAP affordable housing. Tap a row to model it.

Result

Floor by floor

Custom district

Your proposed rezoning

Enter the rules for a district you’re proposing, or start from an existing one and adjust. Pick the XX chip above to model it.

Name

Floor area ratio

Min. street wallfeet

Max. base heightfeet, setback above this

Max. building heightfeet

Setback, wide streetfeet

Setback, narrow streetfeet

Rear yard up to 75′feet

Rear yard above 75′feet

Site and building

Assumptions

Wide street

Wide streets are 75′ or more. Check the street’s mapped width on the City’s map.

Corner lot

Frontage on wide streetfeet

Depthfeet

Corner portionfeet from the corner along each street, no rear yard

Measured lot

Wing depth

How deep each wing runs back from the street. Deeper wings mean a shorter building.

Ground floor heightfeet, floor to floor

Typical floor heightfeet, floor to floor

Rules used

Zoning Resolution, as amended 12/5/2024

Floor area: ZR 23-22 (R6–R12), ZR 23-21 (R1–R5)
Base and building heights: ZR 23-432
Setbacks, 10′ wide street and 15′ narrow street: ZR 23-433
Rear yards, 20′ up to 75′ and 30′ above: ZR 23-342
Lot coverage, 80% interior and 100% corner: ZR 23-362
Dwelling unit factor of 680: ZR 23-52
Lots and owners: NYC MapPLUTO (Department of City Planning); addresses: NYC GeoSearch

This is a first-pass feasibility model, not a zoning analysis for filing. It treats the zoning lot as a rectangle, puts street walls on the street line, takes setbacks at the maximum base height, treats the first 100′ from the corner along each street as the corner portion, and leaves out courts, permitted obstructions, parking and commercial floor area. Today’s zoning other than the districts listed is shown by floor area only, with a simplified low-rise mass. Have your architect confirm before you rely on it.