321 Clinton Avenue, Brooklyn
Co-op · 12 units · built c. 1875 · Block 1930, Lot 5.
Building permits
- Alteration, filed Oct 28, 2026, estimated cost $4K, described as “Addition of handrail to existing building entry stair. No change in use, occupancy, or egress.”
- Alteration, filed Jul 2, 2026, estimated cost $15K, described as “Install new split a.c, system at APT#9 of an existing 3.5-story building with mechanical work as per plans filed herewith. No change in use, egress or certificate of occupancy.”
- Alteration, filed Feb 29, 2024, estimated cost $19K, described as “Structural repair work for existing exterior steel deck. No change in use, egress and occupancy.”
- Alteration, filed Feb 26, 2024, estimated cost $10K, described as “Install new a.c. System at APT#3 of existing 3.5 story building with mechanical work as per plans filed herewith. No change in use, egress or certificate of occupancy.”
- Alteration, filed Apr 28, 2023, estimated cost $5K, described as “Install new a.c. System at APT#5 of existing 3 story building with mechanical work as per plan filed herewith. No change in use, egress or certificate of occupancy.”
- Alteration, filed Jan 17, 2023, estimated cost $50K, described as “Add Structural support for new door & window openings in existing side & rear walls; Strengthen existing roof structure for proposed modifications to terrace in conjunction with B00530183-no change to use, egress or occupancy under this…”
- Alteration, filed Jun 4, 2021, estimated cost $94K, described as “Herewith file interior renovation of existing apartment. Work type to include installation of non-load bearing partition wall and doors, relocation of bathroom and kitchen. Existing stair to remain. No change in use, egress or occupancy…”
Property taxes
- Assessment
- $1,206,900
- 2026–27 tax
- $144,900
- Market value (city estimate)
- $2,682,000
- Taxable value
- $1,163,360
- Assessed land
- $405,000
- Assessed improvements
- $801,900
Zoning
R6B: floor area ratio 2.39 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
- Feb 2, 2026: $1,450,000
- Aug 9, 2023: $1,403,000
- Sep 15, 2022: $1,310,000
- May 18, 2022: $1,100,000
- Mar 30, 2021: $1,237,000
Open-market sales since 2016, from the Department of Finance’s sales files.
Landmarks
Part of Clinton Hill Historic District (Historic District). 32 Landmarks Preservation Commission permits are on file.