6810 21st Avenue, Brooklyn
Four-family · built c. 1931 · Block 5579, Lot 40.
Building permits
No building permits on file for this lot.
Property taxes
- Assessment
- $498,600
- 2026–27 tax
- $15,889
- Market value (city estimate)
- $1,108,000
- Taxable value
- $127,735
- Assessed land
- $94,950
- Assessed improvements
- $403,650
Zoning
R5: floor area ratio 1.26 built, 1.50 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.