R10H Zoning District — New York City

Only 18 tax lots citywide carry this designation — one of the smaller scales of any profile in this batch — and its recorded stock is also the tallest: a median building height of 18 stories, with 94% of recorded buildings rising above 6 floors, the highest high-rise share of any designation covered here. The median construction year is 1927, with 67% of buildings predating 1940 and 22% dating to the 1945-1975 boom. Zero percent of the recorded stock has gone up since 2000, meaning every building on record here predates the current century entirely — a distinctive absence, since most other designations profiled in this batch carry at least some share of post-2000 construction, however small.

By recorded building class, elevator apartment buildings lead at 61%, condominiums follow at 28%, and hotels add a further 11% — a vertical, mixed-use composition rather than a purely residential one, and one of the only designations in this batch to carry a recorded hotel share at all. Land use runs a related pattern: multi-family elevator use leads at 56%, mixed residential-and-commercial use follows at 28%, and commercial-and-office use adds 17%. Eighty-three percent of these 18 lots are coded residential, and the file counts 1,853 units on record — a meaningful total concentrated onto a very small number of tall parcels, consistent with the elevator-building classes recorded above.

Lots here run to a median of 8,312 square feet, with the largest on record reaching 22,593 square feet — ground large enough to carry the height recorded above without reading as an unusually cramped footprint. A recorded 17% of these lots also carry historic-district status, a real but modest overlay given how small the designation's total lot count already is. None of the 18 lots, 0%, sit inside the mapped federal flood zone, on the current record.

Floor-area headroom is the tightest recorded in this batch: just 17% of lots show built area below their allowance, with a median residual of 0 — a stock already built close to its recorded line, consistent with the age, height, and near-total absence of any 2000-or-later construction noted above. With only 18 lots carrying this designation citywide, each individual parcel's file weighs heavily on every percentage reported on this page, more so than on most other designations profiled in this batch. The specific allowance behind that headroom figure, along with its citation, is set out in the rules tables above.