6509 18th Avenue, Brooklyn
Commercial · built c. 1931 · Block 5554, Lot 6.
Building permits
- Alteration, filed Sep 20, 2026, estimated cost $3K, described as “Installation of an illuminated business accessory sign . No change in use, egress or occupancy.”
- Alteration, filed Jun 10, 2026, estimated cost $276K, described as “Interior renovation to build commercial laundry. Work includes new installation of minor partitions and door, concrete pad and supporting column for washers. Exhaust vent for dryers with f.a.i. And a/c & heating system, replace floor &…”
Property taxes
- Assessment
- $512,100
- 2026–27 tax
- $50,632
- Market value (city estimate)
- $1,138,000
- Taxable value
- $466,740
- Assessed land
- $90,000
- Assessed improvements
- $422,100
Zoning
C4-2: floor area ratio 1.14 built, 3.40 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.