# 424 West End Avenue, Manhattan

Apartment building · 230 units · built 1982 · Block 1228, Lot 61.

On Umarelli: https://umarelli.org/nyc/1012280061/424-west-end-avenue

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

Every lot on block 1228: https://umarelli.org/nyc/manhattan/1228.md

## Building permits

- Alteration, filed Mar 4, 2026, estimated cost $100K, described as “Interior renovation of existing commercial space in the basement. No change to use, egress, or occupancy.”
- Alteration, filed Feb 24, 2026, estimated cost $15K, described as “Replacement of ac handler unit in basement and in the basement roof level , all as per plan filed herewith , no change in use egress or occupancy”
- Alteration, filed Jan 12, 2024, described as “New work to perform, all details remain the same just positioning suspended scaffolds.”
- Alteration, filed Jan 3, 2024, estimated cost $56K, described as “Interior renovations for dental office at basement, include removing and installing new interior non-load bearing partitions, lighting and finish work. No change to use, egress or occupancy.”
- Alteration, filed Aug 8, 2023, estimated cost $97K, described as “Exterior facade repairs of flashing replacement and single brick replacement, no change in use, egress or occupancy.”
- Alteration, filed Jun 7, 2023, estimated cost $30K, described as “Replace and install new split HVAC units in existing location roof over basement, floor, and replace air handler unit at ,mechanical basement intermediate level obtain equipment use permit . All as per plan no change in use egress or…”
- Alteration, filed Jun 25, 2021, estimated cost $700K, described as “Exterior facade repair of patching at concrete slab edge and patching at concrete parapet, no change in use, egress or occupancy.”
- Alteration, filed Mar 29, 2021, described as “Sidewalk shed proposed installation of sidewalk shed as per plan. No change in use,egress or occupancy.”

## Property taxes

- Assessment: $45,957,600
- 2026–27 tax: $5,246,023
- Market value (city estimate): $102,128,000
- Taxable value: $42,173,990
- Assessed land: $13,545,000
- Assessed improvements: $32,412,600

## Zoning

R10A: floor area ratio 15.13 built, above the 10.00 base zoning allows, which bonuses, transfers or older rules can permit.

## Flood zone

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

## Landmarks

Part of Riverside-West End Historic District Extension I (Historic District). 28 Landmarks Preservation Commission permits are on file.

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