M1-2D Zoning District — New York City

This designation is mapped across roughly 1,000 tax lots, and the recorded stock on that scale reads old and largely settled: a median construction year of 1924, with 72% of recorded buildings predating 1940. The 1945-1975 postwar boom added 11% of the stock, and just 6% of recorded buildings date from 2000 or later, with most of the building already in place well before the modern era began. At a scale of roughly 1,000 lots, a 72% prewar share means the overwhelming majority of what stands today was already built before the current zoning framework existed at all.

The recorded building classes describe a residential-and-working mix: walk-up apartment buildings lead at 25% of tracked classes, two-family homes follow at 24%, and warehouses add 18%. By land use, one-and-two-family buildings and multi-family walk-up buildings each hold 25% of the lots, and industrial-and-manufacturing use adds a further 24% — a footprint where small residential buildings and working industrial ground sit side by side rather than in separate zones. That close balance between one-and-two-family use, walk-up use, and industrial use, each landing near a quarter of the file, describes a genuinely mixed residential-and-manufacturing edge rather than a district that leans clearly one way.

61% of these roughly 1,000 lots are coded residential, and together they record 2,750 homes — a large total built up from small parcels rather than a few large ones. That reading is confirmed by the lot sizes on record: a median of just 2,020 square feet, with the 90th percentile reaching only 7,513 square feet — a tight lot fabric for a designation mapped at this scale. Height stays low across that fabric too: a median of 2 stories, with only 1% of recorded buildings rising above 6 floors. Low buildings on small, consistent lots, repeated across roughly a thousand parcels, is how a stock this size reaches a unit count in the thousands without any recorded height to speak of.

0% of these lots sit inside the mapped federal flood zone on record, and 0% carry historic-district status, despite the age of the stock described above. The development ledger shows recorded headroom on most of the footprint: 61% of lots record floor area below their allowance, with a median residual of 0.3 FAR — modest room, consistent with lots this small. Between the prewar age, the small lot sizes, and the modest but widespread recorded headroom, this designation's roughly 1,000 parcels describe an old, tightly built residential-and-industrial edge with only incremental room left on record. Each lot's own page carries its individually recorded floor area; the rules tables above carry the governing numbers with their citations.