# 5723 21st Avenue, Brooklyn

Two-family · built 1960 · Block 5501, Lot 1.

On Umarelli: https://umarelli.org/nyc/3055010001/5723-21-avenue

More construction in Borough Park: https://umarelli.org/nyc/brooklyn/borough-park.md

Every lot on block 5501: https://umarelli.org/nyc/brooklyn/5501.md

## Building permits

- Alteration, filed Jun 30, 2026, estimated cost $581K, described as “Herewith filing for horizontal enlargement and interior renovation. (3) three story with cellar, (1) one family building. No change in use, egress or occupancy”
- Alteration, filed Jan 7, 2026, estimated cost $127K, described as “Application filed herewith for interior renovation at first andsecond floor, with replacement facade, windows, roof (2) two story, (2)two family building.no change in use, egress or occupancy.”

## Property taxes

- Assessment: $93,780
- 2026–27 tax: $10,819
- Market value (city estimate): $1,563,000
- Taxable value: $54,525
- Assessed land: $21,000
- Assessed improvements: $72,780

## Zoning

R5: floor area ratio 0.73 built, 1.50 allowed by base zoning.

## Recent sales

- Jul 10, 2025: $2,600,000

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