# 18 Clarkson Avenue, Brooklyn

Condominium · 4 units · built c. 1931 · Block 5064, Lot 7502.

Some of the city’s records for this lot were still loading when this page was made; it refreshes within minutes.

On Umarelli: https://umarelli.org/nyc/3050647502/18-clarkson-avenue

More construction in Flatbush: https://umarelli.org/nyc/brooklyn/flatbush.md

Every lot on block 5064: https://umarelli.org/nyc/brooklyn/5064.md

## Building permits

Permit records are unavailable right now; the map lists them once the city responds.

## Property taxes

- Assessment: $470,250
- 2026–27 tax: $903
- Assessed land: $49,501
- Assessed improvements: $420,749

## Zoning

R6B: floor area ratio 1.78 built, 2.00 allowed by base zoning.

## Flood zone

Current FEMA flood map: zone X, minimal flood hazard.

From New York City and Jersey City public records, refreshed within a day of each release. Sources: https://umarelli.org/sources. Methodology and corrections: https://umarelli.org/methodology