M1-2/R6B Zoning District — New York City

Historically, the 290 tax lots carrying this designation run old: 81% of recorded buildings predate 1940 — the highest prewar share among the moderately sized designations in this batch — with a median construction year of 1920. The 1945-1975 postwar boom left a modest mark at 6% of the stock, while 12% of buildings on record date from 2000 or later, a steady if modest trickle of recent construction layered onto an old base. That combination — overwhelming age with a still-real trickle of construction after 2000 — places this designation among the older, more slowly evolving stocks profiled in this batch, closer in age to the smallest, most historic designations than to the larger, more industrial ones.

Walk-up apartment buildings lead the recorded building classes at 31%, followed by mixed residential-and-commercial buildings at 19% and two-family homes at 15%. Land use runs a similar course: multi-family walk-up use covers 33% of the 290 lots, mixed residential-and-commercial use another 25%, and one- and two-family use 20%. In total, 80% of the 290 lots are residential on record, holding 2,499 homes — a residential share combined with the age described above that reads as a settled, mid-density fabric rather than the more mixed industrial-residential pattern some other designations in this file show.

What distinguishes this designation from others in the batch is the overlap of two separate map layers on top of that old residential base. 18% of these 290 lots sit inside the mapped federal flood zone — a statement about the regulatory boundary rather than a record of actual flooding — and 4% carry historic-district status on record, the only nonzero historic-district share in this batch. An old, mostly residential stock here carries both flood-map and landmark exposure at once, where most of the other designations profiled show one or neither, and rarely both together.

Lots run to a median of 2,500 square feet, with the largest recorded parcels reaching 5,792 square feet, at a median height of 3 stories and just 1% of buildings rising above 6 floors. 62% of these 290 lots show recorded floor area under their allowance, with a typical residual of 0.4 FAR — a narrower gap than some of the other moderately sized designations profiled in this batch. What actually governs floor area and height for the designation, citation by citation, is set out in the tables above; any single lot's own recorded numbers are on that lot's page.