C6-4 Zoning District — New York City

Roughly 870 tax lots carry this designation on record, and the buildings on them read as a mix of eras rather than a single one: 57% predate 1940, 12% date from the 1945-to-1975 boom, and 21% have gone up since 2000 — the largest of the three recorded construction-era shares here. The median construction year is 1931, splitting the difference between an older core and a steady stream of newer building that has continued well past the boom years. None of the three recorded shares accounts for half the stock on its own, describing a designation built up across decades rather than in a single wave.

Height and population are both pronounced: buildings rise to a median of 5 stories, with 45% recorded above 6 floors, and the designation's roughly 870 lots carry 57,897 recorded homes between them — a large population relative to the lot count, consistent with taller buildings on a meaningful share of parcels. Only 42% of lots are classified residential, though, meaning much of that height and population sits alongside a substantial share of non-residential use across the same roughly 870 lots.

Office buildings account for 14% of the recorded building classes and mixed residential-commercial buildings 15%. By land use, mixed residential-and-commercial use covers 34% of lots and commercial-and-office use another 33%, a close split between the two. Lots run large, with a median of 7,118 square feet and a 90th percentile reaching 45,600, a wide recorded spread between typical and larger lots here.

On the development ledger, 73% of lots record floor area below their allowance, with a median residual of 6 FAR. A recorded 6% of lots sit inside the mapped Special Flood Hazard Area, and 2% carry a historic-district designation — both modest overlays on a stock otherwise defined by its scale and mix. The governing FAR, height, and use rules are set out in the tables above with their citations; a specific lot's recorded flood or historic status is tracked lot by lot rather than only as a designation-wide total.

This designation's recorded stat families all report in full, with nothing marked absent for coverage. That completeness matters for a designation whose profile combines a large recorded population with a comparatively low residential share, at 57,897 homes against just 42% of lots classified residential — two figures that read differently together than either would alone. Each lot's own recorded floor-area, flood, and historic status is checkable individually, drawn from the same complete file as the shares cited above.