C5-3 Zoning District — New York City

Few designations on the city's zoning map read as vertically as this one. Across roughly 560 lots citywide, the median recorded building rises 15 floors, and 70% of the stock stands above 6 floors — a skyline signature that shows up on relatively few of the city's commercial designations. That height sits on genuinely old ground: the median construction year is 1930, and 63% of recorded buildings predate 1940, well before the current zoning code existed. Only 7% of the stock has gone up since 2000, and 20% dates to the 1945-to-1975 postwar boom, meaning the buildings carrying most of this height were largely built two or three generations ago and have simply stayed in service since. A designation this tall and this old on record reads less as a story of recent towers than of older buildings that were ambitious from the start.

The recorded building classes lean heavily toward office use: 49% of buildings on these lots are classed as office space, with store buildings adding 14% and condominiums a further 13%. Land use tells a similar story from a different angle — 68% of lots are recorded as commercial and office use, with mixed residential-and-commercial parcels at 17% and vacant land at 5%, a modest but real share of undeveloped ground inside an otherwise built-up designation. Only 21% of the lots are recorded as residential, though the units on that slice are not trivial: 21,604 homes on record sit inside a designation whose primary recorded character is commercial rather than residential — a reminder that a small residential share can still carry a large recorded population when the buildings run this tall.

The lots themselves run mid-sized for dense commercial ground: a median of 7,900 square feet, with the largest lots on record reaching 37,657 square feet, room enough for the towers the height figures describe. Development records show 45% of lots carrying some floor area below their allowance, though the median residual sits at 0 — most of the built stock already sits close to what its records permit rather than leaving broad unused room across the district, consistent with a stock old enough to have filled in most of its own footprint over time. A recorded 1% of lots also fall inside a designated historic district, a small but real slice layered on top of the commercial pattern.

Flood exposure by the federal map is present but limited: 3% of lots carrying this designation sit inside the mapped Special Flood Hazard Area, a figure worth checking parcel by parcel rather than assuming away for any one address, particularly given how tall and long-standing much of the recorded stock is. Each parcel's own page carries its specific recorded height, use, and flood status, and the rules tables above translate the designation into its governing floor-area and height figures with citations.