M1-9A Zoning District — New York City
M1-9A is a contextual, low-density Light Manufacturing District (High Performance) (NYC Zoning Resolution § 11-122) in New York City.
M1-9A is a contextual, low-density Light Manufacturing District (High Performance) (NYC Zoning Resolution § 11-122) in New York City. It allows industrial and commercial uses; new residences are generally excluded. As of right, the maximum commercial FAR is 15. 37 tax lots citywide carry M1-9A as their primary zoning designation.
Records for lots carrying this designation describe an unusual pairing: a stock that is almost entirely prewar — 95% of buildings predate 1940, with a median construction year of 1924 — yet rises to a median of 14 stories, with 89% of recorded buildings above 6 floors. Office buildings lead the recorded classes at 73%, on roughly 37 tax lots citywide. The file carries no reliable floor-area-capacity coverage, so no headroom figure is available here.
What actually stands in this district
Few designations in this file pair two facts as directly in tension as this one. The recorded stock is deeply prewar — 95% of buildings predate 1940, and the median construction year is 1924, among the older recorded medians a manufacturing-zoned designation in this batch can show. Only 3% of the stock falls inside the 1945-1975 postwar boom, and just 3% has been built since 2000, meaning the file has added almost nothing new in either era since the buildings that still stand today first went up. Two eras separated by a full postwar building boom produced, in other words, almost exactly the same tiny share of this file's recorded stock.
Yet this old stock is not low. The median recorded height is 14 stories, and 89% of buildings on record rise above 6 floors — figures that belong with the taller designations in this file rather than the low industrial pattern common elsewhere. Office buildings account for 73% of the recorded building classes, with factory and industrial buildings and store buildings each recording 11% — a loft-and-office fabric of early-era high-rises built for production and commerce rather than the single-story sheds found on smaller designations. Height and age moving in opposite directions like this is unusual enough that the two figures are worth reading together rather than in isolation.
By land use, commercial and office parcels cover 84% of the file, with industrial and manufacturing use at 11% and mixed residential-and-commercial use at 5% — a mostly commercial corridor with only a small industrial and residential thread. Only 5% of these roughly 37 lots are recorded as residential, yet the file still counts 1,498 units on record — a large housing count concentrated onto a small residential share, consistent with a few tall buildings holding most of the recorded homes rather than housing spread evenly across the file.
Lots run to a median of 7,357 square feet, with the largest on record reaching 12,681 square feet — a tight, uniform footprint for a stock this tall, leaving height rather than lot size to explain the scale of the recorded building stock. None of the lots, 0%, sit inside the mapped federal flood zone, and none carry historic-district status. The file carries no reliable floor-area-capacity coverage for this designation, so no headroom or residual-FAR figure can be reported here — an absence in the record rather than a claim about what could still be built; the governing rules themselves are set out, with citations, in the tables above.
Bulk rules for M1-9A
| Context | Commercial FAR | Community facility FAR | Manufacturing FAR | Max lot coverage | Heights | Citation |
|---|---|---|---|---|---|---|
| As of right§ 43-46(c): no max height; above 350 ft max lot coverage 50% of lot area. | 15 | 15 | 15 | 50% | Base 155 ft | NYC Zoning Resolution § 43-132, § 43-25, § 43-262, § 43-46 |
Values from the NYC Zoning Resolution, verified 2026-06-12; site-specific overlays, special districts, and waterfront rules can modify them — run a full lookup for a specific lot.
About manufacturing districts
Manufacturing districts allow industrial and many commercial uses; new residences are generally excluded. Manufacturing bulk is governed by § 43- of the NYC Zoning Resolution.
Contextual districts pair their floor-area ceilings with prescribed base and maximum building heights so new buildings mirror existing neighborhood form; non-contextual districts govern the envelope through more general height and setback rules, such as sky exposure planes. Commercial districts also allow residences under the rules of a residential-equivalent district, while manufacturing districts generally exclude new residences. Overlays and special purpose districts can modify any of this on a specific lot.
Example lots zoned M1-9A
- 554 8 Avenue — 13,166 sq ft lot, 19.42 built FAR, built 1924
- 252 West 40 Street — 12,097 sq ft lot, 9.97 built FAR, built 2016
- 240 West 40 Street — 11,625 sq ft lot, 11.8 built FAR, built 1923
- 250 West 39 Street — 12,146 sq ft lot, 14.98 built FAR, built 1926
- 231 West 39 Street — 19,058 sq ft lot, 11.47 built FAR, built 1911
- 240 West 37 Street — 14,812 sq ft lot, 8.83 built FAR, built 1904
- 540 8 Avenue — 9,875 sq ft lot, 22.87 built FAR, built 1925
- 247 West 37 Street — 14,812 sq ft lot, 14.46 built FAR, built 1924
- 252 West 37 Street — 9,131 sq ft lot, 15.29 built FAR, built 1924
- 263 West 38 Street — 10,121 sq ft lot, 14.46 built FAR, built 1925
- 255 West 36 Street — 8,352 sq ft lot, 13.48 built FAR, built 1923
- 242 West 36 Street — 12,681 sq ft lot, 12.04 built FAR, built 1922
M1-9A — quick questions
- What is the maximum commercial FAR in M1-9A?
- 15, as of right, per NYC Zoning Resolution § 43-132, § 43-25, § 43-262, § 43-46. Site-specific overlays, special districts, and waterfront rules can modify it — run a full lookup for a specific lot.
- Is M1-9A a contextual district?
- Yes. M1-9A is a contextual district — its bulk rules pair floor-area ceilings with prescribed base and maximum building heights intended to mirror existing neighborhood form.
- How many tax lots are zoned M1-9A?
- 37 tax lots citywide carry M1-9A as their primary zoning designation, per NYC municipal records as of 2026-07-11.
- How old are the buildings recorded under this designation?
- Deeply prewar: 95% of recorded buildings predate 1940, with a median construction year of 1924. Only 3% date from the 1945-1975 boom and just 3% have gone up since 2000.
- How tall are the buildings on lots zoned this way?
- Tall despite their age: a median of 14 stories, with 89% of recorded buildings rising above 6 floors.
- What kind of buildings stand on lots with this designation?
- Mostly offices: 73% of recorded building classes are office buildings, with factory and industrial buildings and store buildings each at 11%, on roughly 37 tax lots citywide.
- Is there room to build more on lots zoned this way?
- The record does not say: this designation carries no reliable floor-area-capacity coverage, so no headroom figure is available. The governing allowance for any specific lot is on the rules tables above.
Keep learning
What do the M1-9A rules mean for a specific lot?
PearlAudit resolves the governing zoning for any NYC tax lot — district, overlays, special districts — and cites the Zoning Resolution section behind every rule claim.
District data: NYC municipal records (Department of City Planning) and the NYC Zoning Resolution. See our sources and methodology. Parcel data as of 2026-07-11.