Marine Park-Mill Basin-Bergen Beach, Brooklyn

This stretch of southeastern Brooklyn — Marine Park, Mill Basin, and Bergen Beach — carries a construction history split almost evenly between two eras: 48% of recorded buildings predate 1940, and 41% rose during the postwar boom of 1945 to 1975. The median construction year sits at 1940, right at the boundary this analysis uses to define the prewar period. Construction since 2000 makes up just 4% of buildings. That even split between the prewar and postwar-boom periods stands out on its own terms: most of the area's recorded building stock arrived in one of two broad construction waves, not gradually over time.

Building-class records show one-family homes as the dominant type by a wide margin, recorded on 59% of buildings, with two-family homes at 29% and walk-up apartment buildings at 6%. Land use runs even more concentrated, with 89% of parcels recorded as one- and two-family use, 6% as multi-family walk-up, and 2% as mixed residential and commercial. Between the building-class and land-use figures, house-scale living defines most of what stands on these lots today.

Federal flood mapping covers 4% of the roughly 11,000 lots here, a small but real and present share for a neighborhood built along inland waterways — a statement about the map, not a claim about what has flooded. Zoning headroom covers 67% of lots, with a median residual FAR of 0.2. A residual FAR of this size describes the recorded gap between built floor area and district maximum, not an intention to close it. Height stays low, with a median of 2 stories and 0% of buildings recorded above 6 stories. Lots run a median of 2,475 square feet, reaching 4,683 square feet at the 90th percentile.

97% of parcels carry a residential designation, and the roll counts 17,952 housing units. No lots here carry a recorded historic-district designation. The area borders Canarsie, Flatlands, and Madison. The districts governing this area are low-rise residential categories built for detached and semi-detached housing, consistent with the one-family-dominant class mix on record.

One-family and two-family buildings — standalone and two-unit houses, in the city's classification — together cover well over three-quarters of this area's recorded stock. Walk-up buildings make up only a small remainder here, consistent with the concentrated one- and two-family land-use pattern described above. That 89% land-use concentration is among the very highest recorded across all the neighborhoods currently covered in this particular batch of records.