C6-7 Zoning District — New York City

No designation in this set records a tighter commercial land-use concentration: 82% of its roughly 49 tax lots fall under commercial-and-office use, with mixed residential-and-commercial use adding 14% and multi-family elevator use 2%. Recorded residential use is correspondingly thin — just 16% of lots — though the file still counts 1,731 units on that narrow residential share, a meaningful count even set against how little of the designation is coded residential.

Office buildings lead the recorded building classes at 35%, with other recorded classes not further coded on this page filling out the balance. What stands is tall for a designation this commercially coded: a median height of 15 stories, with 67% of the recorded stock rising above 6 floors, a height profile that tracks the office-heavy building-class mix.

The stock is majority prewar at 59%, with a median construction year of 1927. The 1945-to-1975 boom contributed 12% of the recorded buildings, and 14% have been built since 2000 — slightly more recent construction than postwar, though neither era dominates the record and most of the stock still traces back to before 1940.

On development capacity, 45% of lots record floor area below their allowance, though the median residual is 0 — little recorded headroom on a typical lot despite the broad share showing some gap. Lots run to a median of 10,961 square feet, with a 90th percentile of 37,854. None of these lots, 0%, sit inside the mapped federal flood zone on the current map — a statement limited to where the map's boundary currently falls, not a claim about water on the ground.

Altogether, the file describes a designation defined by its commercial land-use concentration more than by any single building era: the recorded stock is old enough to be majority prewar, tall enough to lean toward the taller end of this set, and thin enough on housing that its 1,731 units sit on a small minority of lots. What development capacity remains is broadly but thinly distributed, with little recorded gap on a typical parcel. Specific allowances and their citations sit in the rules tables above, keyed to each lot. Set against the other commercially coded designations profiled on these pages, this one stands out for how consistently its land use, height, and residential figures all point in the same office-and-commercial direction, rather than mixing several distinct patterns in one file the way some mixed-use designations elsewhere in this set do.