M1-5M Zoning District — New York City

Almost nothing on record here was built after 1940. Across the roughly 120 tax lots carrying this designation, 98% of recorded buildings predate that year, the median construction year is 1899, and a full 0% have gone up since 2000 — among the most complete prewar concentrations of any designation profiled in this family, with no recent-construction layer on top of it at all. Just 1% of the stock falls inside the 1945-to-1975 postwar boom, meaning the twentieth century after 1940 left almost no mark on this footprint, and the file shows essentially no construction activity of any kind across the past several decades on any of these roughly 120 parcels.

That age is matched by heavy landmark coverage: 79% of these roughly 120 lots carry historic-district status on record, a substantial majority. Office buildings lead the recorded building classes at 25%, elevator apartment buildings follow at 22%, and condominiums add 18% — a mixed working-and-housing pattern rather than a single dominant type. Land use runs 43% mixed residential-and-commercial, 30% commercial-and-office, and 15% multi-family elevator, a file that tracks the building-class mix closely rather than diverging from it, reinforcing the same working-and-housing character on both measures.

Height on record runs to a median of 6 stories, with exactly half of the recorded stock, 50%, rising above 6 floors — a genuinely mid-rise profile for buildings this old, and one of the taller median heights recorded among the older designations in this family. Lot sizes run tight, a median of 2,592 square feet with a 90th percentile of 10,731 square feet, ground consistent with the dense prewar block pattern the age figures already describe. Just under two-thirds of these lots, 63%, are coded residential, and the file counts 1,886 homes on them, a substantial recorded population for a footprint this old and this consistently prewar.

None of these 120 lots, 0%, sit inside the mapped federal flood zone, an absence consistent with the inland, densely landmarked character the rest of this file already describes. The file carries no reliable development-capacity coverage for this designation, so no headroom or residual-FAR figure can be cited here — an absence in the record rather than a claim about what could still be built on ground this old and this densely landmarked. Building class, land use, age, height, and flood status are all tracked for these same 120 parcels individually, even where the development family remains unrecorded.