520 West End Avenue, Manhattan
Apartment building · 10 units · built c. 1892 · Block 1233, Lot 1.
Building permits
- Alteration, filed Apr 22, 2026, estimated cost $162K, described as “Interior renovation of apartment 3/4. No change to occupancy, use or egress.”
- Alteration, filed Apr 18, 2026, estimated cost $1K, described as “Installation of temporary heavy duty sidewalk shed and pipe scaffold as per plans. No change in use, egress or occupancy.sidewalk shed shall comply with chapter #33 of 2022 the NYC building code.live load 300PSF.”
- Alteration, filed Feb 17, 2026, estimated cost $240K, described as “Exterior masonry wall repair.”
- Alteration, filed Jan 23, 2026, estimated cost $50K, described as “Interior renovation of apartment 9. No change to occupancy, use or egress.”
- Alteration, filed Sep 21, 2022, estimated cost $1K, described as “Installation of temporary heavy duty sidewalk shed as per plans. No change in use, egress or occupancy. Sidewalk shed shall comply with chapter #33 of the NYC building code. Live load 300PSF.”
- Alteration, filed Sep 21, 2022, estimated cost $1K, described as “Proposed installation of temporary pipe scaffold as per plans. Work shall comply with chapter #33 of the NYC building code. No change in use, occupancy, or egress under this application.”
Property taxes
- Assessment
- $2,436,300
- 2026–27 tax
- $115,463
- Market value (city estimate)
- $5,414,000
- Taxable value
- $928,233
- Assessed land
- $389,700
- Assessed improvements
- $2,046,600
Zoning
R10A: floor area ratio 3.05 built, 10.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Nov 24, 2025: $3,500,000
Open-market sales since 2016, from the Department of Finance’s sales files.
Landmarks
Part of John B. & Isabella Leech House: Individual Landmark, Riverside-West End Historic District Extension I (Historic District). 38 Landmarks Preservation Commission permits are on file.
Board and land use applications
- LEECH RESIDENCE (City Planning P1989M0129): Completed, decided Sep 29, 1988. LANDMARK-CITY COLLEGE OF NY, REMSEN CEMETERY,TROTTING*COURSE LA; Additional LPC #(s): 335
- LEECH HOUSE (City Planning P1987M0752): Completed, decided Jun 30, 1987. LANDMARK-CITY COLLEGE OF NY, REMSEN CEMETERY,TROTTING*COURSE LA; Additional LPC #(s): 208