821 Union Street, Brooklyn
Apartment building · 8 units · built c. 1920 · Block 954, Lot 62.
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.