# 155 West 23rd Street, Manhattan

Commercial · built c. 1910 · Block 799, Lot 12.

On Umarelli: https://umarelli.org/nyc/1007990012/155-west-23-street

More construction in Chelsea: https://umarelli.org/nyc/manhattan/chelsea.md

Every lot on block 799: https://umarelli.org/nyc/manhattan/799.md

## Building permits

- Alteration, filed Aug 6, 2025, described as “IRA to assist with Condition Assessment.”
- Alteration, filed Jul 19, 2023, estimated cost $588K, described as “Vault replacement as per plans filed herewith. no change to use, egress or occupancy.”
- Alteration, filed Apr 26, 2023, estimated cost $19K, described as “Modifications of sprinklers on the first floor as per plans filed. No change to use, egress or occupancy.”
- Alteration, filed Apr 26, 2023, estimated cost $27K, described as “Installation of plumbing fixtures on the first floor as per plans filed. No change to use, egress or occupancy.”
- Alteration, filed Apr 26, 2023, estimated cost $130K, described as “Installation of HVAC equipment of the first floor as per plans filed. No change to use, egress or occupancy.”
- Alteration, filed Apr 26, 2023, estimated cost $300K, described as “Interior renovation work on the first floor as per plans filed. No change to use, egress or occupancy. Change of use established under ALT1 # 123412039.”
- Alteration, filed Jul 5, 2022, described as “Installation of temporary supported scaffold per plan submitted. Work shall comply with 2014 building codes chapter 33. No change in use, egress and/or occupancy with this application.”
- Alteration, filed Jul 7, 2021, estimated cost $433K, described as “Herewith filing for the installation of mechanical systems on the 11TH and 12TH floors. No change to use egress or occupancy.”
- Alteration, filed Jul 7, 2021, estimated cost $178K, described as “Herewith filing for plumbing/ sprinkler work for interior renovation at the 11TH and 12TH fl. No chance to use, egress or occupancy.”
- Alteration, filed Jul 7, 2021, estimated cost $3.3M, described as “Herewith filing for construction work on the 11TH and 12TH floor- related plumbing/sprinkler , mechanical and structural applications files separately. No change to use, egress or occupancy”
- Alteration, filed Jun 17, 2021, estimated cost $15K, described as “Filing for temp loop and sprinkler removal at the 10TH floor. No change to use egreess or occupancy.”
- Alteration, filed Jun 17, 2021, estimated cost $147K, described as “Mechanical work for the 10th floor no change to use egress or occupancy”
- Alteration, filed Jun 17, 2021, estimated cost $61K, described as “Permanent Sprinkler application for Floor 10 no change to use egress or occupancy”
- Alteration, filed Jun 17, 2021, estimated cost $5K, described as “Plumbing work at the 10TH fl, no change to use egress or occupancy”
- Alteration, filed Jun 16, 2021, estimated cost $1.2M, described as “Herewith filing for construction work on the 10th floor- related plumbing/sprinkler , mechanical and structural applications files separately. No change to use, egress or occupancy”
- Alteration, filed Jun 16, 2021, estimated cost $750K, described as “Filing for structural work at 10TH, 11TH and 12TH floor. No change to use,egress or occupancy.”
- Alteration, filed May 17, 2021, estimated cost $15K, described as “Filing for temp loop and sprinkler removal at the 11 and 12TH floors. No change to use egreess or occupancy.”
- Alteration, filed May 14, 2021, estimated cost $135K, described as “Interior non structural demolition. NO CHANGE TO USE, EGRESS OR OCCUPANCY”
- Alteration, filed Apr 20, 2021, estimated cost $1.5M, described as “Herewith filing for structural work for the interior renovation at 11TH and 12TH floor. No change to use,egress or occupancy.”
- Alteration, filed Apr 19, 2021, estimated cost $431K, described as “Facade repairs as per plans filed herewith. No change to use, egress or occupancy.”
- Alteration, filed Apr 8, 2020, estimated cost $1K, described as “Installation of sidewalk shed for pedestrian safety during construction. Sidewalk shed shall comply with nycc 2014 chapter 33 . No change in egress, use, or occupancy.”
- Alteration, filed Jan 24, 2020, estimated cost $27K, described as “Plans filed herewith for the modification to the existing sprinkler system. No change in use, egress, or occupancy.”
- Alteration, filed Jan 24, 2020, estimated cost $68K, described as “Plans filed herewith for mechanical work within an existing office space. No change in use, egress, or occupancy.”
- Alteration, filed Jan 10, 2020, estimated cost $20K, described as “Plumbing work within an existing office space. No change in use, egress, or occupancy.”
- Alteration, filed Sep 25, 2018, estimated cost $1K, described as “Application filed herewithin to install an illuminated sign. No change in use, egress or occupancy under this application.”

1 more, older permit is in this building’s full list on the map: https://umarelli.org/nyc/1007990012/155-west-23-street.

## Property taxes

- Assessment: $12,152,700
- 2026–27 tax: $1,174,513
- Market value (city estimate): $27,006,000
- Taxable value: $10,827,000
- Assessed land: $751,500
- Assessed improvements: $11,401,200

## Zoning

C6-3X: floor area ratio 11.64 built, above the 9.00 base zoning allows, which bonuses, transfers or older rules can permit.

## Flood zone

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

## Board and land use applications

- Variance or special permit (Board of Standards and Appeals 2019-197-BZ): Variance or special permit, Granted, filed Jul 24, 2019, decided Dec 17, 2019. Special Permit (§73-36) to permit the legalization of a physical culture establishment (Solidcore) contrary to ZR §22-10. C6-3X zoning district.

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