308 23rd Street, Brooklyn
Two-family · built c. 1901 · Block 900, Lot 60.
Building permits
- New Building — Multi-Family, filed Nov 26, 2025, 5 units, 5 stories, described as “Propose new 5-story plus cellar residential building as per plan. Obtain new c of o.”
- Alteration, filed Dec 4, 2025, estimated cost $160, described as “Proposed 8FT construction fence. No change to use, egress or occupancy under this application.”
- Demolition, filed Sep 9, 2025, estimated cost $30K, described as “Full demolition to a two story house”
Property taxes
- Assessment
- $109,920
- 2026–27 tax
- $3,190
- Market value (city estimate)
- $1,832,000
- Taxable value
- $16,076
- Assessed land
- $25,620
- Assessed improvements
- $84,300
Zoning
R6B: floor area ratio 0.49 built, 2.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Sep 16, 2025: $1,570,000
Open-market sales since 2016, from the Department of Finance’s sales files.
In the news
Permits Filed for 308 23rd Street in South Slope, Brooklyn, New York YIMBY, Mar 28, 2026.