6423 18th Avenue, Brooklyn
Four-family with store · built c. 1927 · Block 5547, Lot 1.
Building permits
- Alteration, filed Feb 12, 2026, estimated cost $50K, described as “Application is filed for the installation of a new mechanical system and all other associated work as per plans. No change in use, egress, or occupancy”
Property taxes
- Assessment
- $782,550
- 2026–27 tax
- $79,103
- Market value (city estimate)
- $1,739,000
- Taxable value
- $635,929
- Assessed land
- $86,400
- Assessed improvements
- $696,150
Zoning
C4-2: floor area ratio 2.80 built, 3.40 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.