East Harlem (North), Manhattan

Substantial recorded development capacity is still on the books in East Harlem (North): 82% of lots carry floor area below what current rules would allow, and the median residual on those lots runs to 1.7 FAR points — a meaningful cushion between what's built and what current zoning would permit. That headroom sits on parcels with a median size of 2,295 square feet, with the larger end of the range reaching 10,092 square feet, so the unused capacity is distributed mostly across a lot base that runs modest in scale rather than concentrated in a handful of large sites. A residual figure this size, spread across four out of five lots, points to a neighborhood where the built environment has not caught up with what the zoning map currently allows.

The age profile is split between two eras. The median recorded construction year is 1910 and 73% of buildings predate 1940, putting most of the stock in the prewar category. But 17% of recorded buildings date from 2000 or later — a meaningfully higher recent-construction share than found on some of the surrounding blocks — while only 5% falls into the 1945-1975 postwar-boom window, one of the thinner postwar shares among the neighborhoods in this set. The result on record is an older core with newer infill layered in rather than a uniform building era, which lines up with the recorded development headroom described above: a neighborhood with room to add has, on the numbers, already begun to do so in pockets.

Multi-family walk-up buildings are the largest land-use category at 36% of lots, followed by mixed residential-and-commercial use at 25% and multi-family elevator buildings at 7%. In the building-class mix, walk-up apartment structures account for 44%, mixed residential-commercial buildings 10%, and elevator apartment buildings 8%. Height on record is modest: a median of 4 stories, with 8% of buildings recorded above 6 floors, and 73% of all lots classified as residential carrying 33,107 units in total — among the larger recorded unit counts of the neighborhoods profiled in this stretch of Manhattan.

18% of lots sit inside the federally mapped flood zone — a regulatory-map fact, not a claim about water reaching any particular block; the map line can separate two adjacent lots without either one carrying a different elevation worth noting. None of the neighborhood's lots are recorded inside a designated historic district, so the development headroom described above isn't subject to landmark review, and an addition on a qualifying lot would be governed by zoning bulk rules rather than a landmarks process.

East Harlem (North) borders East Harlem (South) to the south, and Harlem (North) and Harlem (South) to the west — three neighborhoods whose recorded flood, age, and headroom figures each read somewhat differently on the same set of measures.