421 Crown Street, Brooklyn
Co-op · 39 units · built c. 1923 · Block 1292, Lot 1.
Building permits
- Alteration, filed Apr 20, 2026, estimated cost $5K, described as “Installation of 300PSF sidewalk shed as per plans. Sidewalk shed shall comply with chapter 33 of NYC code 2022. No change in use, occupancy or egress under this application.”
- Alteration, filed Nov 17, 2025, estimated cost $5K, described as “Proposed repair of stone lintels to be done as needed as per plans.no change in use occupancy or egress under this application.”
- Alteration, filed Aug 5, 2025, estimated cost $21K, described as “Minor interior renovation to existing apartment #14R on the 3RD floor .work includes replce interior finishes, new floor covering ,new cabinetry in kitchen , replace electrical outlet. Replace plumbing fixtures in kind. No change in use…”
- Alteration, filed Jun 29, 2023, estimated cost $10K, described as “Application herewith filed for interior renovations of apt.#19L on the 4TH floor of existing multi-family residence. No change to use, egress or occupancy.”
Property taxes
- Assessment
- $1,184,400
- 2026–27 tax
- $68,368
- Market value (city estimate)
- $2,632,000
- Taxable value
- $549,627
- Assessed land
- $258,750
- Assessed improvements
- $925,650
Tax breaks
- Article XI exemption, through Jun 30, 2029, about $78,959 a year below the full tax.
Zoning
R4: floor area ratio 3.50 built, above the 1.00 base zoning allows, which bonuses, transfers or older rules can permit.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- May 27, 2026: $570,000
- Mar 13, 2025: $210,000
- Dec 19, 2024: $295,000
- Aug 31, 2023: $415,000
- May 31, 2023: $400,000
- Jan 6, 2022: $100,000
- Jun 18, 2018: $100,000
Open-market sales since 2016, from the Department of Finance’s sales files.