M1-4/R7-2 Zoning District — New York City

Few designations in this file pair flood exposure this high with a construction record this split. Across roughly 41 tax lots carrying this designation, 90% sit inside the mapped federal flood zone — among the highest shares recorded for any designation profiled here, a description of where the regulatory boundary falls rather than a ledger of which lots have actually taken on water. The stock above that ground reads in two eras at once: 50% of recorded buildings predate 1940, and 44% have been built since 2000, while just 6% date from the 1945-1975 postwar boom that filled in so much of the city between those two periods. The median construction year, 1931, sits inside the older half of that split, though the newer half is large enough that the file effectively describes two separate construction waves sharing the same ground rather than one continuous building history. That combination — an old layer, a new layer, and a flood boundary drawn over nearly all of it — makes this one of the more layered records in the file.

The recorded land use leans toward a mix of trade and living space: mixed residential-and-commercial parcels account for 45% of lots, industrial use another 16%, and vacant land 11%. Building classes point a similar direction, led by elevator apartment buildings at 30% of the recorded stock, with vacant-land classifications at 10% and a further recorded class also at 10%. Even with that working character, 58% of lots are coded residential overall, and the file counts 5,652 recorded homes across this designation's footprint — a sizable residential base sitting alongside its industrial and mixed-use neighbors. The presence of vacant-land classifications alongside that residential count suggests a footprint still being filled in, with older elevator buildings, working parcels, and open ground recorded side by side rather than one uniform building type.

Lot sizes here run large: a median of 17,644 square feet, with the largest recorded parcels reaching 65,376 square feet — ground consistent with the elevator buildings and industrial parcels the land-use figures describe. Height on that ground reaches a median of 3 stories, with 38% of recorded buildings rising above 6 floors, a taller profile than the low-rise pattern common elsewhere in this file. None of these lots, 0%, carry historic-district status on record, meaning whatever review applies to construction here comes from the zoning itself rather than from any landmark layer.

The development ledger shows most of this designation's lots still holding unused capacity on record: 63% record floor area below their allowance, at a median gap of 1.6 FAR. On ground this large, that residual can describe meaningful square footage, though what any single parcel can add depends on the rules that apply to its specific lot rather than on the designation-wide figures alone. Each of the roughly 41 tax lots carrying this designation has its own recorded specifics; the governing floor-area and height rules are set out, with citations, in the tables above.