315 Adelphi Street, Brooklyn
Three-family · built c. 1867 · Block 2104, Lot 3.
Building permits
- Alteration, filed Nov 20, 2025, estimated cost $134K, described as “Interior renovation of bas and 001. Exterior work at rear facade at rear only. No change in use, bulk, occupancy or egress.”
- Alteration, filed Aug 23, 2023, estimated cost $73K, described as “Job filed to relocate the entrance doors to the apartment on 3RD floor and other cosmetic renovation work as per plans. No change to use and occupancy.”
- Alteration, filed May 11, 2023, estimated cost $111K, described as “Installation of (2) Air Condensers on Roof w/ minimal construction to roof (mounting purposes only, limited to 10 sqf). In addition, installation of two AC units on 2nd FL and two AC units on 3rd FL w/ partial wall removal & ceiling demo /…”
- Alteration, filed Feb 2, 2023, estimated cost $6K, described as “Interior gas piping work. Disconnect, cap and remove (2) exist. Gas meters in the celler and (2) exist. Gas stoves in the 2ND & 3RD floor apartments.”
- Alteration, filed May 23, 2022, estimated cost $13K, described as “Install chimney liner.”
Property taxes
- Assessment
- $226,440
- 2026–27 tax
- $20,065
- Market value (city estimate)
- $3,774,000
- Taxable value
- $101,120
- Assessed land
- $45,420
- Assessed improvements
- $181,020
Zoning
R6B: floor area ratio 1.80 built, 2.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Nov 6, 2025: $5,650,000
- Oct 30, 2020: $4,500,000, 2,970 sq ft ($1,515 per sq ft)
Open-market sales since 2016, from the Department of Finance’s sales files.
Landmarks
Part of Fort Greene Historic District (Historic District). 15 Landmarks Preservation Commission permits are on file.