The BronxNeighborhoods & Property Records

The Bronx is the only borough on the mainland, and its records split along a line older than the zoning code. West of the Bronx River, the apartment tradition dominates: neighborhoods of five- and six-story walk-ups and elevator buildings raised in the borough's great prewar building booms, when new subway lines made the western hills an extension of upper Manhattan. The neighborhood pages there show median construction years deep in the prewar decades, land-use mixes led by multi-family buildings, and — distinctively — some of the largest recorded development headroom in the city, where districts drawn for density exceed what the prewar builders used.

East of the river the fabric changes. Neighborhoods toward the Sound and along the borough's eastern reaches record land-use mixes led by one- and two-family houses, much of the stock dating to the postwar decades, on blocks whose zoning contemplates and delivers modest scale. The two traditions meet along commercial corridors where the records show newer, larger buildings arriving — the borough's recent construction concentrates visibly along its transit spines, and the neighborhood pages date that arrival with the recorded share of buildings from the last two decades.

The southern waterfront carries the borough's industrial history and much of its flood exposure: peninsulas and inlets where manufacturing districts persist, mapped federal flood zones reach inland along the creeks, and the records mix warehouses, yards, and housing at close quarters. It is also where the borough's redevelopment pressure reads most clearly in the files — rezonings, new residential filings, and industrial parcels changing hands. As everywhere on these pages, the flood figures are computed from each lot's actual geometry against the federal maps — reputation plays no part in the arithmetic.

All of it — zoning districts, building ages, unit counts, flood shares, violation counts — derives from NYC municipal records and federal mapping, dated on each page. The neighborhood pages open into per-lot records, where absence is reported as absence: 'nothing on file' is a statement about the state of the file on a given date, never a certification about the building standing on the lot.