531 Montgomery Street, Brooklyn
Two-family · built c. 1925 · Block 1298, Lot 63.
Building permits
- Alteration, filed Jan 14, 2026, estimated cost $10K, described as “Herewith filing for support of excavation work as per plans. No change to use, egress or occupancy under this application.”
- Alteration, filed May 28, 2024, estimated cost $10K, described as “Alteration application filed to Temporary lateral Bracing on Exposure-4 Wall”
- Alteration, filed May 15, 2024, estimated cost $712K, described as “Alteration of existing 2-story 2-family house to 3-story 1-family house”
Property taxes
- Assessment
- $95,940
- 2026–27 tax
- $9,581
- Market value (city estimate)
- $1,599,000
- Taxable value
- $48,284
- Assessed land
- $22,680
- Assessed improvements
- $73,260
Zoning
R5: floor area ratio 0.82 built, 1.50 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Dec 28, 2023: $2,400,000
Open-market sales since 2016, from the Department of Finance’s sales files.