# 520 West End Avenue, Manhattan

Apartment building · 10 units · built c. 1892 · Block 1233, Lot 1.

On Umarelli: https://umarelli.org/nyc/1012330001/520-west-end-avenue

More construction in Upper West Side: https://umarelli.org/nyc/manhattan/upper-west-side.md

Every lot on block 1233: https://umarelli.org/nyc/manhattan/1233.md

## 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.

## Recent sales

- Nov 24, 2025: $3,500,000

Open-market sales since 2016, from the Department of Finance’s sales files.

## Flood zone

Current FEMA flood map: zone X, minimal flood hazard.

## 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

From New York City and Jersey City public records, refreshed within a day of each release. Sources: https://umarelli.org/sources. Methodology and corrections: https://umarelli.org/methodology