4 West 90th Street, Manhattan
Apartment building · 10 units · built c. 1889 · Block 1203, Lot 38.
Building permits
- Alteration, filed Jul 28, 2020, estimated cost $5K, described as “Proposed installation of heavy duty sidewalk shed as per plans. Live load 300 lbs per square feet. Sidewalk shed shall comply with chapter #33 of the NYC building code. No change in use, occupancy, or egress under this application.”
Property taxes
- Assessment
- $939,150
- 2026–27 tax
- $116,821
- Market value (city estimate)
- $2,087,000
- Taxable value
- $939,150
- Assessed land
- $222,750
- Assessed improvements
- $716,400
Zoning
R10A: floor area ratio 4.05 built, 10.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Aug 3, 2026: $5,200,000, 7,754 sq ft ($671 per sq ft)
- Mar 20, 2024: $6,400,000
Open-market sales since 2016, from the Department of Finance’s sales files.
Landmarks
Part of Upper West Side/Central Park West Historic District (Historic District). 10 Landmarks Preservation Commission permits are on file.