# 821 Union Street, Brooklyn

Apartment building · 8 units · built c. 1920 · Block 954, Lot 62.

On Umarelli: https://umarelli.org/nyc/3009540062/821-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

- Alteration, filed Oct 22, 2025, estimated cost $9K, described as “Installation of 300PSF sidewalk shed and pipe scaffolding as per plans. All equipment shall comply with ch #33 of the NYC code 2022. No change in use, occupancy or egress under this application.”

## Property taxes

- Assessment: $1,102,050
- 2026–27 tax: $21,915
- Market value (city estimate): $2,449,000
- Taxable value: $176,177
- Assessed land: $15,300
- Assessed improvements: $1,086,750

## Zoning

R6A: floor area ratio 2.93 built, 3.00 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