198 21st Street, Brooklyn
Condominium · 8 units · built 2005 · Block 643, Lot 7504.
Building permits
- Alteration, filed Jun 23, 2026, estimated cost $20K, described as “Interior renovation of the existing 4th floor at apt. 4A, ex. Non-bearing partition relocate as per plan. No change in use, occupancy, or egress.”
Property taxes
- Assessment
- $1,133,098
- 2026–27 tax
- $1,162
- Market value (city estimate)
- $2,518,000
- Taxable value
- $9,340
- Assessed land
- $39,600
- Assessed improvements
- $1,093,498
- Condo units with their own tax lots
- 8
Tax breaks
- 421-a exemption, through Jun 30, 2032, about $139,784 a year below the full tax.
Zoning
R6B: floor area ratio 2.38 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
- Oct 18, 2024: $665,000, Apt 4B
- May 6, 2024: $645,000, Apt 2B
- Jan 4, 2023: $760,000, Apt 1A
- Feb 16, 2022: $575,000, Apt 3A
- Feb 11, 2020: $645,000, Apt 2A
- Jul 11, 2018: $635,000, Apt 4B
- Aug 28, 2017: $618,000, Apt 3A
- Jan 20, 2016: $676,000, Apt 1B
Open-market sales since 2016, from the Department of Finance’s sales files.