# 823 Union Street, Brooklyn

Two-family · built c. 1901 · Block 954, Lot 60.

On Umarelli: https://umarelli.org/nyc/3009540060/823-union-street

More construction in Park Slope: https://umarelli.org/nyc/brooklyn/park-slope.md

Every lot on block 954: https://umarelli.org/nyc/brooklyn/954.md

## Building permits

No building permits on file for this lot.

## Property taxes

- Assessment: $237,600
- 2026–27 tax: $8,964
- Market value (city estimate): $3,960,000
- Taxable value: $45,174
- Assessed land: $38,460
- Assessed improvements: $199,140

## Zoning

R6A: floor area ratio 1.52 built, 3.00 allowed by base zoning.

## Recent sales

- Mar 5, 2026: $3,000,000, 2,736 sq ft ($1,096 per sq ft)

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