5801 18th Avenue, Brooklyn
Two-family · built c. 1925 · Block 5505, Lot 9.
Building permits
- Major Renovation — Enlargement, filed Jul 20, 2026, estimated cost $558K, 1 unit added, 3 stories, described as “Alteration of existing two story one family to three story two family building.”
- Alteration, filed Sep 25, 2025, estimated cost $13K, described as “Installation of heavy duty sidewalk shed. No change in use, occupancy or egress under this application, all work to comply with chapter 33 of nycbc.”
- Alteration, filed Sep 4, 2025, estimated cost $1K, described as “Installation of a temporary construction fence as per plans.”
Property taxes
- Assessment
- $170,460
- 2026–27 tax
- $11,305
- Market value (city estimate)
- $2,841,000
- Taxable value
- $56,971
- Assessed land
- $27,240
- Assessed improvements
- $143,220
Zoning
R5: floor area ratio 1.11 built, 1.50 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Aug 11, 2025: $2,550,000
Open-market sales since 2016, from the Department of Finance’s sales files.