M1-6A/R9A Zoning District — New York City

Among designations that pair with heavier industrial zoning, this one stands out for how residential its recorded stock actually is: 88% of these roughly 18 lots are coded residential, one of the higher shares in this batch. One-family homes lead the recorded building classes at 44%, mixed residential-and-commercial buildings follow at 33%, and two-family homes add 6% — a small-house pattern rather than anything resembling the warehouse or garage stock recorded on other designations nearby. That contrast is worth sitting with: a designation this residential, mapped alongside more industrial neighbors elsewhere in this batch, describes a genuinely mixed corner of the file rather than a uniform manufacturing footprint.

Land use backs up that residential reading: one- and two-family use covers 53% of lots, mixed residential-and-commercial use another 35%, and industrial-and-manufacturing use just 6%. The file counts 33 units across the designation, and lot sizes are unusually tight and uniform — a median of 2,160 square feet, with even the 90th percentile reaching only 2,500 square feet, a narrower spread than almost any other designation profiled in this batch. That tightness in lot size echoes the small-house building classes recorded above, describing a stock built to a consistent scale rather than a mix of parcel sizes.

The construction record is heavily prewar: a median year of 1920, with 94% of recorded buildings predating 1940. The 1945-1975 postwar boom left no mark on record at all, at 0%, while a modest 6% of buildings have gone up since 2000. Buildings stay low across the stock, at a median of 2.5 stories, with 0% recorded above 6 floors — consistent with the small-house classes leading the file above and a construction record that stopped adding meaningful new stock decades ago before that small recent trickle resumed.

Development room is close to universal: 100% of these lots record floor area below their allowance, with a median residual of 6.3 FAR, a wide gap on parcels this small — one of the more striking pairings in this batch of a tightly built residential stock with that much recorded capacity still unused. None of these lots, 0%, sit inside the mapped federal flood zone or carry historic-district status, leaving the age, scale, and headroom figures above as the measures that most define this designation's file. Each lot's own recorded figures live on that lot's own page, and the floor-area and height rules that govern this designation are cited, with their sections, in the tables above.