523 3rd Street, Brooklyn
Three-family · built c. 1899 · Block 1078, Lot 65.
Building permits
- Alteration, filed Jul 2, 2025, estimated cost $75K, described as “Install solar PV on existing rooftop. No change in use, occupancy, or egress.”
- Alteration, filed Apr 30, 2024, estimated cost $570K, described as “Renovation throughout existing 4-story residential building. Change occupancy from 3 families to 2 family. New windows, enlarge opening at rear of first floor for deck access.”
Property taxes
- Assessment
- $259,500
- 2026–27 tax
- $10,035
- Market value (city estimate)
- $4,325,000
- Taxable value
- $78,684
- Assessed land
- $51,240
- Assessed improvements
- $208,260
Tax breaks
- Solar abatement, through Jun 30, 2030, a $5,579 credit this tax year.
Zoning
R6B: floor area ratio 2.08 built, above the 2.00 base zoning allows, which bonuses, transfers or older rules can permit.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Oct 27, 2021: $4,475,000
Open-market sales since 2016, from the Department of Finance’s sales files.
Landmarks
Part of Park Slope Historic District (Historic District). 10 Landmarks Preservation Commission permits are on file.