411 Classon Avenue, Brooklyn
Three-family · built c. 1901 · Block 1967, Lot 3.
Building permits
- Alteration, filed Oct 24, 2025, estimated cost $139K, described as “Filing for interior demolition, rear wall of building opening, new porch, general construction of an apartment unit as per plans filed. No change in use, egress or occupancy.”
- Alteration, filed Jul 24, 2023, estimated cost $5K, described as “Installation of 300PSF sidewalk shed and pipe scaffolding as per plans. All equipment shall comply with chapter #33 of the 2022 code no change in use, egress or occupancy under this application.”
- Alteration, filed Dec 8, 2021, estimated cost $2K, described as “Filing for renovation of an existing apartment. Architectural proposed as per plans filed herewith. No change of use, occupancy or egress under this application.”
Property taxes
- Assessment
- $215,400
- 2026–27 tax
- $7,659
- Market value (city estimate)
- $3,590,000
- Taxable value
- $38,597
- Assessed land
- $13,980
- Assessed improvements
- $201,420
Zoning
R6B: floor area ratio 2.27 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 14, 2016: $1,735,000
Open-market sales since 2016, from the Department of Finance’s sales files.