305 Union Avnue, Brooklyn
Condominium · 19 units · built 2017 · Block 2413, Lot 7502.
Building permits
- Alteration, filed Jul 23, 2018, estimated cost $5K, described as “Installation of a pipe scaffold as per plans in conjunction with NB construction. No change in use, egress or occupancy. Scaffold shall comply with 2014 NYC building code, chapter 33.”
Property taxes
- Assessment
- $3,597,068
- 2026–27 tax
- $190,563
- Market value (city estimate)
- $8,619,993
- Taxable value
- $1,550,598
- Assessed land
- $314,318
- Assessed improvements
- $3,282,750
- Condo units with their own tax lots
- 20
Tax breaks
- 421-a exemption, through Jun 30, 2034, about $258,851 a year below the full tax.
Zoning
R6: floor area ratio 2.75 built, above the 2.43 base zoning allows, which bonuses, transfers or older rules can permit.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Jun 10, 2025: $1,825,000, Apt 3C
- Sep 3, 2024: $1,700,000, Apt 4A
- Jun 10, 2024: $1,764,959, Apt 3A
- Mar 22, 2023: $2,050,000, Unit PHA
- May 21, 2020: $2,150,000, Unit PHA
- May 8, 2020: $996,556, Unit PHB
- Mar 11, 2020: $1,135,000, Apt 2B
Open-market sales since 2016, from the Department of Finance’s sales files.