558 Willoughby Avenue, Brooklyn
Two-family · built c. 1910 · Block 1767, Lot 29.
Building permits
- Major Renovation — Conversion, filed Jun 25, 2025, estimated cost $911K, 2 units added, 4 stories, described as “Proposed horizontal and vertical enlargement to an existing two (2) story building, converting to a four (4) story + cellar and penthouse residential use building.”
Property taxes
- Assessment
- $120,060
- 2026–27 tax
- $1,552
- Market value (city estimate)
- $2,001,000
- Taxable value
- $7,820
- Assessed land
- $14,280
- Assessed improvements
- $105,780
Zoning
R6B: floor area ratio 1.08 built, 2.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Jan 19, 2016: $1,101,000
Open-market sales since 2016, from the Department of Finance’s sales files.