R8X Zoning District — New York City

This designation is one of the rarer ones covered in this batch, mapped across only about 170 tax lots citywide — one of the smaller footprints among the ten designations profiled here. Despite that small footprint, the recorded stock runs comparatively tall: 22% of buildings rise above 6 floors, on a median height of 4 stories — a higher tall-building share than several larger designations in this file, and a notable figure for a designation mapped across so few lots. Scarcity and height together make this one of the more distinctive recorded profiles in the batch. That combination — relatively few lots, a comparatively tall stock — sets this designation apart from the larger, lower-rise designations that make up most of this batch.

The base beneath that height is prewar: a median construction year of 1921, with 80% of recorded buildings predating 1940 and just 3% from the 1945-1975 boom. Recent building has continued modestly, at 11% since 2000. Elevator apartment buildings lead the recorded classes at 26%, with walk-up apartment buildings at 18% and condominiums at 12% — a mix skewed toward larger, taller buildings than the walk-up designations elsewhere in this batch, matching the taller-than-typical height figures noted above. None of the other recorded classes approaches the elevator-building share, reinforcing a stock built taller and denser than the walk-up-scale designations profiled elsewhere in this file.

By land use, multi-family elevator use covers 26% of lots, mixed residential-and-commercial use 22%, and multi-family walk-up use 19%, a spread across several uses without one type dominating the footprint. Residential use overall covers 80% of lots, and the tax-lot records count 7,248 homes across this small footprint. Lots themselves run large — a median of 5,130 square feet, with the 90th percentile reaching 21,472 square feet, among the largest recorded in this batch, scale consistent with the taller elevator buildings that make up a quarter of the recorded classes. Even at the high end, though, the recorded lot sizes stay within range of several other designations in this batch rather than standing apart the way the height figures do.

A recorded 32% of these lots sit inside designated historic districts, a substantial landmark overlay for a designation this size, while 0% fall inside the mapped federal flood zone — a statement about the regulatory boundary, not a record of what water any lot has actually seen. Recorded capacity runs broad — 83% of lots show floor area below their allowance, with a median gap of 3.5 FAR, one of the wider recorded gaps among the designations profiled in this batch. Floor-area and height limits for any one of these 170 lots, each with its citation, sit in the tables above.