# 35 West 23rd Street, Manhattan

Condominium · 4 units · built c. 1880 · Block 825, Lot 7501.

On Umarelli: https://umarelli.org/nyc/1008257501/35-west-23-street

More construction in Flatiron: https://umarelli.org/nyc/manhattan/flatiron.md

Every lot on block 825: https://umarelli.org/nyc/manhattan/825.md

## Building permits

- Alteration, filed Apr 16, 2026, estimated cost $53K, described as “Alteration and repair of interior partition walls and doors of the entry, study, and laundry room. (total apt. SF is 3250 sf., area of work is 354 SF)”
- Alteration, filed Oct 31, 2023, estimated cost $2K, described as “Erect non-illuminated wall sign and non-illuminated d/f blade sign. Signs are accessory to citymd.”
- Alteration, filed Mar 29, 2023, estimated cost $100K, described as “(3) new doublewall 304 stainless steel offset/extensions with (3) new draft inducers. (2) wood burning fireplace flues and (1) gas fireplace flue in conjunction with NB 121190424 not visible from street. No change in means of egress, use…”
- Alteration, filed Sep 27, 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 Aug 10, 2022, estimated cost $10K, described as “Install new chimney liner and extension as per plans. No change to use, occupancy or egress.”
- Alteration, filed Jul 19, 2022, estimated cost $25K, described as “Refiling of DOB# 120299676 for replacement gas-fired boiler as per plans. No change in use, occupancy, or egress.”
- Alteration, filed Jul 19, 2022, estimated cost $5K, described as “Refiling of DOB# 120299676 for installation of replacement gas-fired hot water heater. Connect replacement gas piping as per plans. No change in use, occupancy, or egress.”
- Alteration, filed Jun 27, 2022, estimated cost $10K, described as “Storefront renovation as per plans. No change in use, egress or occupancy.”
- Alteration, filed Oct 13, 2021, estimated cost $1K, described as “Installation of temporary construction fence as per plans. No change in use, occupancy or egress.”
- Alteration, filed Feb 25, 2020, 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 Oct 25, 2019, 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 Oct 25, 2019, described as “Installation of temporary sidewalk shed per plan submitted. Work shall comply with 2014 building codes chapter 33. No change in use, egress and/or occupancy with this application.”

## Property taxes

- Assessment: $6,050,700
- 2026–27 tax: $344,963
- Market value (city estimate): $13,446,000
- Taxable value: $2,954,294
- Assessed land: $495,000
- Assessed improvements: $5,555,700
- Condo units with their own tax lots: 5

## Tax breaks

- Co-op and condo abatement, with no end date, a $22,522 credit this tax year.

## Zoning

M1-8A/R11: floor area ratio 4.17 built, 12.00 allowed by base zoning.

## Recent sales

- Aug 13, 2026: $5,800,000, Apt 2
- May 12, 2025: $5,495,000, Apt 3
- Jan 25, 2022: $4,580,000, Apt 4
- Nov 2, 2017: $5,000,000, Apt 2

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 Ladies' Mile Historic District (Historic District). 39 Landmarks Preservation Commission permits are on file.

## Board and land use applications

- Midtown South Mixed-Use Plan (MSMX) (City Planning 2024M0142): Zoning map change, Zoning text change, Completed, filed Jan 16, 2025, decided Aug 14, 2025. The Department of City Planning is seeking a Zoning Map amendment from M1-6 and M1-6D to M1-9A/R12, M1-8A/R12, and M1-8A/R11 and a Zoning Text amendment to facilitate the development of housing and support critical economic activity across…
- Flatiron BID Expansion (City Planning 2021M0260): Business improvement district, Completed, filed Nov 30, 2020, decided May 19, 2021. An application from the Small Business Services (SBS) on behalf of the Flatiron Business Improvement District (BID) to modify the existing plan and expand the BID in Community Districts 4 and 5 of Manhattan.
- Change to an earlier grant (Board of Standards and Appeals 40-80-BZII): Change to an earlier grant, Granted, filed Oct 25, 2018, decided Feb 12, 2019. Amendment of a previously variance (§72-21) to facilitate the transfer of unused development rights from the variance site for incorporation into a new as-of-right development and approval of previously constructed rooftop additions…
- Change to an earlier grant (Board of Standards and Appeals 40-80-BZ): Change to an earlier grant, Withdrawn, filed Feb 9, 2004, decided Dec 14, 2004. Amendment to permit the proposed vertical enlargement to construct a roof penthouse. Located in an M1-6 zoning district.
- 35-41 WEST 23 ST (City Planning P2012M0131): Completed, decided Sep 19, 2012. RENEWAL OF THE SPECIAL PERMIT TO COMPLETE 21 STORY BUILDING & 3 STORY MIXED-USE DEVELOPMENT LOCATED AT 7-13 W. 21ST STREET, CD 5, MANHATTAN
- 35-41 W23TH ST (City Planning P2006M0246): Completed, decided Sep 19, 2012. 06DCP004M: SPECIAL PERMIT TO ALLOW DEVELOPMENT OF A 22-STORY BUILDING T HAT WOULD INCLUDE 42 RESIDENTIAL UNITS, SPA, GYM AND GROUND FLOOR RETAIL
- 35-37 W23RD ST (City Planning P1980M0678): Completed, decided Jul 7, 1980. Applicant seeks to convert 5 stories of manufacturing into apartments with ground floor retail.

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