M1-4/R7D Zoning District — New York City

Among the designations in this file, few show as clean a gap as this one: 0% of recorded buildings date from the 1945-1975 postwar boom that filled in so much of the city elsewhere. What stands instead is split between two much older and much newer waves — 70% of recorded buildings predate 1940, with a median construction year of 1927, while 30% have gone up since 2000. Across the roughly 11 tax lots carrying this designation, that leaves essentially nothing recorded from the middle decades of the twentieth century, as if the building history here paused for three decades and then resumed with an entirely different generation of construction.

By land use, one- and two-family use and mixed residential-and-commercial use each account for 27% of lots, with industrial use adding a further 18%. Building classes lead with two-family homes at 27% of the recorded stock and elevator apartment buildings at 18%, alongside a third class also at 18%. Altogether 64% of lots are coded residential, and the file counts 405 recorded homes across this small footprint — a meaningful residential share for a designation this size, spread across a land-use mix that still leaves real room for industrial and mixed-use parcels.

Height stays low across the stock: a median of 1.5 stories, with 13% of recorded buildings rising above 6 floors. On a median lot of 10,000 square feet, with the largest recorded parcels reaching 16,500 square feet, 27% of lots sit inside the mapped federal flood zone — a statement about the regulatory boundary, not a record of which specific lots have actually flooded. None of these lots, 0%, carry historic-district status on record, so whatever review applies here comes from the zoning rather than from a landmark layer.

The development ledger shows most of this designation's lots still holding recorded capacity: 82% record floor area below their allowance, at a median gap of 3.7 FAR. On lots this modest in size, that gap still describes real square footage on record, though what any single parcel could add depends on the rules that apply to it specifically rather than on the designation-wide share. For a stock built in two such distinct waves, that recorded headroom sits on both the oldest and the newest parcels alike, rather than concentrating in one era or the other. For any single lot among the roughly 11 carrying this designation, the floor-area and height rules that actually apply are cited in the tables above.