R8B Zoning District — New York City

Few designations in this batch carry a stock this old or this settled. The median construction year is 1901, and 90% of recorded buildings predate 1940 — the deepest prewar share among the districts covered here, describing a fabric that was substantially complete well over a century ago. Just 5% of the stock dates from the 1945-1975 postwar boom, and only 2% has been built since 2000, among the slowest recent-construction records in this file. Construction here effectively stopped generations ago and has barely resumed, leaving a footprint where recent decades have added only the thinnest layer to what stands. Even that small share of newer construction has done little to change the overall shape of a stock substantially completed generations before the current zoning code existed.

That age comes with a heavy landmark layer: 38% of the roughly 7,400 lots carrying this designation sit inside designated historic districts on record, the largest such share in this batch. Walk-up apartment buildings lead the recorded classes at 49%, with elevator apartment buildings and one-family homes each at 14% — a mix that reads as classic attached mid-rise housing rather than towers, consistent with the deep prewar base and heavy landmark coverage described above.

By land use, multi-family walk-up use covers 43% of lots, one- and two-family use 19%, and mixed residential-and-commercial use 15% — a residential-first split with only a modest commercial layer. Residential use overall covers 90% of lots, and the tax-lot records count 121,254 homes across this designation's footprint — a large housing total sustained by density rather than height, since the median building here runs only 5 stories with 9% rising above 6 floors, meaning the housing count comes from coverage across many small lots rather than from height. That density-through-coverage pattern shows up in the land-use figures above as much as in the building-class mix, since none of the recorded categories here approaches the height concentration found in the taller designations profiled elsewhere in this batch.

Lots run small: a median of 2,412 square feet, with the 90th percentile reaching just 7,319 square feet, among the tighter lot spreads in this batch. Recorded capacity is thinner to match — 71% of lots show floor area below their allowance, with a median gap of only 0.7 FAR — while 0% of lots sit inside the mapped federal flood zone, a statement about the regulatory map rather than a claim about water on the ground. Whatever governs a particular lot's floor area and height is tabulated, with its citation, above — this description only covers what already stands on the roughly 7,400 lots that carry this designation.