678 Union Street, Brooklyn
Condominium · 10 units · Block 955, Lot 7504.
Building permits
No building permits on file for this lot.
Property taxes
- Assessment
- $1,350,454
- 2026–27 tax
- $28,054
- Market value (city estimate)
- $3,000,998
- Taxable value
- $377,890
- Assessed land
- $162,000
- Assessed improvements
- $1,188,454
- Condo units with their own tax lots
- 10
Zoning
R6A: floor area ratio 2.94 built, 3.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Apr 28, 2025: $730,000, Apt 4A
- Jun 23, 2021: $625,000, Apt 2A
- Jan 5, 2021: $610,000, Apt 3B
- Oct 12, 2018: $675,000, Apt 1B
Open-market sales since 2016, from the Department of Finance’s sales files.