451 Classon Avenue, Brooklyn
Three-family with store · built c. 1930 · Block 1973, Lot 1.
Building permits
- Alteration, filed Aug 19, 2026, estimated cost $40K, described as “Repair the brick wall at east side for the existing 4 story brick building and to resolve violations 39173292J; 39085884N; 39166433Z;”
- Alteration, filed Aug 10, 2026, estimated cost $9K, described as “Installation of 300PSF sidewalk shed and pipe scaffolding as per plans. All equipment shall comply with ch #33 of the NYC code 2022. No change in use, occupancy or egress under this application.”
- Alteration, filed Jul 8, 2026, estimated cost $175K, described as “Renovation of an existing store, new store front. Partition work as per plan. No change in use, occupancy or exit.”
Property taxes
- Assessment
- $623,700
- 2026–27 tax
- $10,289
- Market value (city estimate)
- $1,386,000
- Taxable value
- $82,712
- Assessed land
- $64,800
- Assessed improvements
- $558,900
Zoning
R6B: floor area ratio 2.35 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
- Jul 2, 2026: $1,500,000, 2,946 sq ft ($509 per sq ft)
Open-market sales since 2016, from the Department of Finance’s sales files.