423 Clermont Avenue, Brooklyn
Four-family · built c. 1867 · Block 1959, Lot 10.
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Building permits
- Alteration, filed Sep 19, 2025, estimated cost $46K, described as “Installation of solar PV system. No change to use, egress, or occupancy.”
Property taxes
- Assessment
- $842,850
- 2026–27 tax
- $13,977
- Assessed land
- $231,300
- Assessed improvements
- $611,550
Zoning
R6B: floor area ratio 1.14 built, 2.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- May 15, 2025: $3,540,000
Open-market sales since 2016, from the Department of Finance’s sales files.