6509 20th Avenue, Brooklyn
Three-family with store · built c. 1931 · Block 5556, Lot 7.
Building permits
- Alteration, filed Sep 18, 2023, estimated cost $11K, described as “Install new domestic water piping in cellar and off the domestic new sprinkler head in 1ST floor of existing 3 story building. Plumbing works as per plan. No change in egress, use, or occupancy.”
Property taxes
- Assessment
- $497,700
- 2026–27 tax
- $12,205
- Market value (city estimate)
- $1,106,000
- Taxable value
- $98,120
- Assessed land
- $95,400
- Assessed improvements
- $402,300
Zoning
R5: floor area ratio 1.82 built, above the 1.50 base zoning allows, which bonuses, transfers or older rules can permit.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.