C6-3D Zoning District — New York City

With only 13 tax lots on record, this is one of the smaller designations on the citywide zoning map, and its profile stands apart from the residential blocks that dominate elsewhere. Just 15% of these lots are classified residential, and the records count only 193 homes among them — a small number even relative to the lot count. That combination — a tiny lot count and a residential share this low — sets this designation's recorded stock apart from a typical residential block.

Construction here skews later than in most designations: the median construction year is 1950, and 27% of recorded buildings date from the 1945-to-1975 boom — well above the 9% built since 2000. Still, 45% of the stock predates 1940, so the designation carries both an older core and a distinct postwar layer, without a single dominant era. Splitting between a prewar core and a postwar-boom addition, without a single dominant era, is a distinctive profile for a designation with only 13 lots.

Office buildings account for 8% of the recorded building classes, and by land use, commercial-and-office use covers 62% of lots, mixed residential-and-commercial use 15%, and parking use another 15% — a mix oriented toward commercial and vehicle-related uses rather than housing. Lots also run considerably larger than the rowhouse norm, with a median of 12,190 square feet and a 90th percentile of 20,000, and buildings stay low, at a median of 2 stories with 9% recorded above 6 floors.

Every one of these 13 lots — 100% — records floor area below its allowance, with a median residual of 8 FAR, a wide margin on parcels already this large. None of the lots carry a recorded historic-district designation, and none sit inside the mapped Special Flood Hazard Area. The rules tables above carry the governing FAR and use limits with their citations; on a designation this small, each lot's own recorded detail is worth confirming lot by lot given how few of them there are.

Even at just 13 lots, this designation's file carries no coverage gaps — every stat family reports in full rather than as a partial sample. That completeness is worth noting precisely because the designation is unusual on several measures at once — a low residential share, a parking-use presence, and a fully recorded development gap that reaches 100% of its lots. Each lot's own recorded class, floor area, and use is tracked at the level of the individual tax lot.