# 423 Clermont Avenue, Brooklyn

Four-family · built c. 1867 · Block 1959, Lot 10.

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On Umarelli: https://umarelli.org/nyc/3019590010/423-clermont-avenue

More construction in Fort Greene: https://umarelli.org/nyc/brooklyn/fort-greene.md

Every lot on block 1959: https://umarelli.org/nyc/brooklyn/1959.md

## Building permits

- Alteration, filed Sep 19, 2025, estimated cost $46K, described as “Installation of solar PV system. No change to use, egress, or occupancy.”

## Property taxes

- Assessment: $842,850
- 2026–27 tax: $13,977
- Assessed land: $231,300
- Assessed improvements: $611,550

## Zoning

R6B: floor area ratio 1.14 built, 2.00 allowed by base zoning.

## Recent sales

- May 15, 2025: $3,540,000

Open-market sales since 2016, from the Department of Finance’s sales files.

## 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