644 Union Street, Brooklyn
Single family · built c. 1899 · Block 955, Lot 20.
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Building permits
Permit records are unavailable right now; the map lists them once the city responds.
Property taxes
- Assessment
- $175,740
- 2026–27 tax
- $3,686
- Market value (city estimate)
- $2,929,000
- Taxable value
- $20,496
- Assessed land
- $20,760
- Assessed improvements
- $154,980
Zoning
R6A: floor area ratio 1.26 built, 3.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.