C6-2A Zoning District — New York City

Roughly 1,400 tax lots on record carry this designation, and their buildings mostly predate the modern city. 83% of recorded structures date from before 1940, the median construction year is 1910, and only 9% of the stock has gone up since 2000. The postwar boom barely touched these blocks — just 4% of recorded buildings date from 1945 to 1975 — leaving a fabric that is older than either of the eras that followed it. A median that early puts the typical building here well ahead of the 1940 boundary that separates prewar stock from everything since, underscoring how early this designation's core was substantially built out.

The recorded building classes lean toward condominiums and elevator apartments: condominium classifications account for 23% of the mix, elevator apartment buildings 14%, and mixed residential-commercial buildings another 14%. By land use, mixed residential-and-commercial use covers half the lots on record at 50%, with commercial-and-office use at 15% and multi-family elevator buildings at 12%. Residential use overall reaches 76% of lots, and the records count 21,361 homes across the designation — a sizable population for roughly 1,400 lots, consistent with the elevator- and mixed-use classes recorded above rather than a purely low-rise pattern.

Lots here run small and fairly uniform — a median of 2,802 square feet, with the 90th percentile reaching 10,700 — and buildings rise to a median of 5 stories, with 27% recorded above 6 floors. Two overlays sit on top of the zoning itself: 39% of these lots fall inside a designated historic district, and 13% sit inside the mapped Special Flood Hazard Area. Both are statements about official maps and boundaries, not forecasts about any one parcel. Carrying both layers at meaningful shares at once means construction on a real share of these lots clears two separate reviews rather than one.

On the development ledger, 77% of lots record floor area below their allowance, with a median residual of 1.6 FAR — real headroom, though concentrated on lots that already carry the historic and flood-map layers described above. That residual is modest relative to the share of lots carrying it, consistent with a stock already built to a meaningful share of what it is allowed. The governing FAR, height, and use rules for any lot carrying this designation sit in the tables above, each with its citation; the historic and flood-map status of a specific address is checkable individually rather than only as a designation-wide average.

This designation's records carry no gaps in coverage — every stat family here reports in full, not partially. That completeness matters specifically because two separate overlays — historic review and flood mapping — sit on the same lots at once, at 39% and 13% respectively, alongside a stock that is 83% prewar and 76% residential. Each lot carrying this designation has its own recorded floor-area, historic, and flood-map status, tracked at the level of the individual tax lot rather than only as a designation-wide figure.