221 Frost Street, Brooklyn
Condominium · 10 units · built 2025 · Block 2857, Lot 7511.
Building permits
- New Building — Multi-Family, filed Nov 3, 2023, 10 units, 5 stories, described as “New residential 5-story building with cellar. 10 dwelling units.”
- Alteration, filed Jan 28, 2025, estimated cost $5K, described as “Proposed installation of temporary pipe scaffold as per plans. Work shall comply with chapter #33 of 2022 the NYC building code. No change in use, occupancy, or egress under this application.”
- Alteration, filed Dec 31, 2024, estimated cost $4K, described as “Installation of temporary heavy duty sidewalk shed as per plans. No change in use, egress or occupancy. Sidewalk shed shall comply with chapter #33 of 2022 the NYC building code. Live load 300PSF.”
- Demolition, filed May 5, 2023, estimated cost $12K, described as “Full demolition of detached masonry garage.”
Property taxes
- Assessment
- $978,752
- 2026–27 tax
- $121,747
- Market value (city estimate)
- $2,175,002
- Taxable value
- $978,752
- Assessed land
- $30,601
- Assessed improvements
- $948,151
- Condo units with their own tax lots
- 10
Zoning
R6B: floor area ratio 2.56 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
- Sep 25, 2026: $2,395,000, Apt 1R
- Jun 25, 2026: $1,861,836, Apt 5R
- May 14, 2026: $1,360,000, Apt 3R
- May 13, 2026: $1,425,000, Apt 4F
- May 11, 2026: $995,000, Apt 1F
- May 6, 2026: $1,325,000, Apt 2F
- May 1, 2026: $1,400,000, Apt 3F
- Apr 24, 2026: $1,463,231, Apt 4R
Open-market sales since 2016, from the Department of Finance’s sales files.
In the news
Permits Filed for 221 Frost Street in Williamsburg, Brooklyn, New York YIMBY, Nov 6, 2023.