# 577 Union Avenue, Brooklyn

Single family with store · built c. 1920 · Block 2300, Lot 18.

On Umarelli: https://umarelli.org/nyc/3023000018/577-union-avenue

More construction in Williamsburg: https://umarelli.org/nyc/brooklyn/williamsburg.md

Every lot on block 2300: https://umarelli.org/nyc/brooklyn/2300.md

## Building permits

- Alteration, filed Oct 12, 2026, estimated cost $80K, described as “Filing for the existing commercial kitchen hood, exhaust fan and associated duct work as per plan shows. There is no change to use, egress or occupancy under this application.”

## Property taxes

- Assessment: $93,480
- 2026–27 tax: $3,395
- Market value (city estimate): $1,558,000
- Taxable value: $17,107
- Assessed land: $6,480
- Assessed improvements: $87,000

## Zoning

M1-2/R6A: floor area ratio 1.11 built, 3.00 allowed by base zoning.

## Flood zone

Current FEMA flood map: zone AE, high risk: a 1% chance of flooding each year, base flood elevation 10 ft (NGVD29). FEMA’s preliminary map: zone X, moderate risk: a 0.2% chance of flooding each year.

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