578 Ralph Avenue, Brooklyn
Co-op · 17 units · built c. 1922 · Block 1387, Lot 52.
Building permits
- Alteration, filed May 15, 2024, estimated cost $68K, described as “Add separate Navien heater unit on each apartment, all as shown on attached drawings submitted. REVISE DRAWINGS SHOWING AS BUILT CONDITIONS. REVISED DRAWINGS TO SATISFY PLUMBING INSPECTION.”
- Alteration, filed Apr 24, 2023, estimated cost $3K, described as “Install additional plumbing fixture at store at 1st floor, all as shown on drawings.”
- Alteration, filed Sep 29, 2022, estimated cost $8K, described as “Erect new awning to resolve ecb violation 39064309Y. No change in use, egress or certificate of occupancy.”
Property taxes
- Assessment
- $441,900
- 2026–27 tax
- $43,186
- Market value (city estimate)
- $982,000
- Taxable value
- $347,181
- Assessed land
- $14,850
- Assessed improvements
- $427,050
Tax breaks
- Article XI exemption, through Jun 30, 2029, about $6,386 a year below the full tax.
Zoning
R6: floor area ratio 3.60 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
- Aug 7, 2025: $162,500
- Mar 28, 2024: $170,000
- May 10, 2022: $125,000
- Apr 8, 2022: $55,000
- Dec 1, 2016: $52,500
- Dec 1, 2016: $62,500
Open-market sales since 2016, from the Department of Finance’s sales files.