R1-1 Zoning District — New York City

Of the three closely related low-rise designations covered in this batch, this one records the latest median construction year: 1965, squarely inside the 1945-to-1975 postwar boom, which itself accounts for 42% of the recorded stock across these roughly 1,600 lots. Only 24% of buildings predate 1940, and 10% have gone up since 2000 — a stock built overwhelmingly in the middle of the twentieth century rather than before or after it. That boom-era weighting is the most distinctive fact in this designation's file, setting it apart from the other two low-rise designations profiled alongside it, both of which carry older recorded medians and a smaller boom-era share. Construction since 2000 still adds a real 10% to the file, keeping the designation from reading as a stock frozen entirely in one decade.

Building class here runs 83% one-family homes, with vacant land recording 13% and outdoor recreational facilities a further 1% — a composition weighted almost entirely toward detached, single-family ground. Land use tracks closely: 84% one- and two-family use, 13% vacant land, and 1% public facilities and institutions. Eighty-four percent of these roughly 1,600 lots are coded residential, and the file counts 1,412 units on record — a modest total, consistent with a designation built around single-family ground rather than multi-unit structures, and with a 13% vacant-land share still recorded on file alongside it.

Lots here run larger than is typical for a low-rise designation: a median of 12,762 square feet, with the 90th percentile reaching 35,588 square feet — sizable ground consistent with the boom-era, lower-density construction the year-built file already points to. Buildings sit at a median of 2 stories, with 0% of the recorded stock rising above 6 floors, a uniformly low-rise profile across the entire file, matching the single-family composition recorded above.

Floor-area headroom is close to universal here: 98% of lots record built area below their recorded allowance, with a median residual of 0.5 FAR — the widest recorded headroom share of the three related designations in this batch. A recorded 6% of lots also carry historic-district status, and 2% sit inside the mapped federal flood zone, both modest overlays on a designation otherwise defined by its boom-era, large-lot character. The specific allowance behind that headroom figure, along with its citation, is set out in the rules tables above, lot by lot.