Co-op City, The Bronx

Co-op City's tax-lot file is the smallest by parcel count of any neighborhood covered here — roughly 240 lots — yet it carries 16,263 recorded housing units, by far the highest unit-per-lot concentration in this file. The lot-size numbers explain how: the median lot runs 5,000 square feet, already large by the standards of neighboring files, and the top of the file reaches even further, to 136,525 square feet, describing a handful of enormous parcels that carry most of the recorded housing. Nowhere else in this batch does so much housing sit on so few recorded lots, and the parcel count alone makes this file an outlier worth reading carefully rather than folding into any borough-wide average.

Height on record here is the tallest in this cluster of neighborhoods: 4% of buildings exceed 6 floors, a small share in absolute terms but the highest recorded among the neighborhoods in this file, against a median height of 1.8 stories overall — meaning most of the file is low even where a few towers pull the tail upward. Construction dates later than most of its neighbors too — the median building was completed in 1974, inside the tail end of the postwar boom between 1945 and 1975, and 23% of the recorded stock has gone up since 2000, tied for the highest since-2000 share in this batch. Prewar construction accounts for a smaller 27% here, and the postwar boom itself contributes another 23% — three era shares within a few points of each other, an unusually even split for this batch.

Land use here is more mixed than the rowhouse pattern found elsewhere in this file: one- and two-family homes cover just 33% of lots, vacant land accounts for 22%, and commercial and office use makes up 15%. Residential use covers only 39% of parcels overall, the lowest share recorded in this batch — a reminder that a large share of the neighborhood's recorded lots serve non-housing purposes even though the housing that exists is dense.

Flood mapping covers 30% of Co-op City's lots on the current federal map, the widest share recorded in this cluster. Development-capacity figures — the headroom and unused-FAR numbers reported for other neighborhoods on these pages — are not reliably recorded here and are left out rather than estimated. The neighborhood borders Eastchester-Edenwald-Baychester and Pelham Gardens, both with their own per-lot files available on these pages, and neither approaches Co-op City's combination of few lots, high units, and elevated flood share.