M1-3A is a manufacturing zoning district governed by ZR 43-132, with commercial far of 4, a maximum building height of 125 feet.
These are the figures the engine applies when it models a lot in M1-3A. Where a rule differs between a narrow and a wide street, both are shown.
| Commercial FAR | 4 | ZR 43-132 |
|---|---|---|
| Manufacturing FAR | 4 | ZR 43-132 |
| Base maximum — wide street | 95 ft | ZR 43-132 |
|---|---|---|
| Max height — wide street | 125 ft | ZR 43-132 |
| Setback — wide street | 10 ft | ZR 43-132 |
| Base maximum — narrow street | 95 ft | ZR 43-132 |
| Max height — narrow street | 125 ft | ZR 43-132 |
| Setback — narrow street | 15 ft | ZR 43-132 |
At 4 FAR, a 10,000 square foot lot in M1-3A carries roughly 40,000 square feet of zoning floor area.
That is the ceiling, not the answer. The height envelope, required yards, lot shape, street width, overlays and any special district all cut into it. Running the real lot is the only way to know which constraint binds first.
A section through the M1-3A envelope, drawn to scale from the figures in the table above. The solid shape is as of right; where the district carries a City of Yes uplift, the dashed outline is what affordable housing adds.
Diagrammatic. It shows the governing heights and the setback on a regular lot, not your lot: the sky exposure plane, lot shape, corner conditions and any overlay all reshape this in practice.
Every area of the city zoned M1-3A, from NYC Planning’s published zoning district layer.
Use groups permitted in M1 districts:
Underbuilt here means a lot of at least 2,500 square feet, built to less than half its residential floor area, in private hands, with at least 20,000 square feet of unused capacity. From PLUTO 26v2. How we counted.
M1-3A has a commercial far of 4, set by ZR 43-132. On a 10,000 square foot lot that is about 40,000 square feet of zoning floor area before any bonus, and before the height envelope and yard requirements are applied.
The maximum building height in M1-3A is 125 feet on a wide street, with a street wall rising to between 0 and 95 feet before a required setback. Height is measured and applied under ZR 43-132.
Source: NYC Planning zoning districts.