400 West 23rd Street, Manhattan
Co-op · 16 units · built c. 1920 · Block 720, Lot 47.
Building permits
- Alteration, filed Apr 28, 2026, 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 2022 the NYC building code. Live load 300PSF.”
- Alteration, filed Feb 17, 2026, estimated cost $5K, described as “Herewith filing for cap and removal of existing sink in cellar as per plans. No change in use, occupancy, or egress under this application. ALT 1 No Work application #123918644 and general construction fit out application #M07994051-I1.”
- Alteration, filed Dec 1, 2025, estimated cost $34K, described as “Apartment combination of apartment #2L/3K with apartment #3L to create apartment #2L/3KL. No change to use, egress or occupancy”
- Alteration, filed Aug 26, 2024, estimated cost $91K, described as “Renovation of main lobby, vestibules, corridors and replace fire stair doors, 910 sf. NO WORK TO COMPACTOR ROOMS, TENANT APARTMENTS, ELEVATORS, BASEMENT, SERVICE AREAS,AND BUILDING EXTERIOR.”
- Alteration, filed Jul 15, 2024, described as “Installation of temporary suspended scaffold equipment”
- Alteration, filed Jun 7, 2024, estimated cost $5K, described as “Installation of pipe scaffolding as per plans. Pipe scaffolding shall comply with chapter # 33 of the 2022 code. No change in use occupancy or egress under this application.”
- Alteration, filed May 2, 2024, estimated cost $20K, described as “Limited repairs to existing stucco at all facades. No change to use, egress or occupancy.”
- Alteration, filed Mar 18, 2024, estimated cost $5K, described as “Installation of 300PSF sidewalk shed per plans. Sidewalk shed shall comply with chapter # 33 of the NYC code 2022, no changes in use egress or occupancy under this application.”
- Alteration, filed Nov 7, 2023, estimated cost $30K, described as “Herewith filing for minor interior renovations of Apt. 3J as indicated on plans. No change in use, occupancy, or egress.”
- Alteration, filed Jun 6, 2023, estimated cost $2K, described as “Erect illuminated accessory business wall sign for citymd on west 23RD street elevation.”
- Alteration, filed Jun 6, 2023, estimated cost $5K, described as “Erect illuminated accessory business wall sign for citymd on 9TH ave elevation.”
- Alteration, filed Oct 31, 2022, estimated cost $147K, described as “Herewith filing for modifications to existing mechanical systems on the 1st and cellar floors as indicated on plans. No change in use, occupancy, or egress.”
- Alteration, filed Oct 31, 2022, estimated cost $41K, described as “Herewith filing for modifications to existing sprinkler system on the 1st and cellar floors as indicated on plans.”
- Alteration, filed Oct 31, 2022, estimated cost $40K, described as “Herewith filing for modifications to existing plumbing system and associated piping on the 1st and cellar floors as indicated on plans.”
- Alteration, filed Oct 4, 2022, estimated cost $10K, described as “Installation of temporary wood construction fence within 3 ft of building face on the sidewalk”
- Alteration, filed Sep 14, 2022, estimated cost $466K, described as “Herewith filing for interior architectural fit out of cellar and 1st floor and modifications to existing storefront as indicated on plans. No change in use, occupancy, or egress.”
- Alteration, filed Apr 11, 2022, estimated cost $30K, described as “Herewith filing for minor interior renovations as indicated on plans. No change in use, occupancy, or egress.”
- Alteration, filed Mar 24, 2022, estimated cost $66K, described as “Herewith filing for interior removals of non-load bearing partitions and existing finishes on the 1st and cellar floors as indicated on plans. No change in use, occupancy, or egress.”
- Alteration, filed Mar 24, 2022, estimated cost $7K, described as “Herewith filing for interior removals of existing plumbing fixtures as indicated on plans for the cellar and 1st floor.”
Property taxes
- Assessment
- $3,592,350
- 2026–27 tax
- $324,956
- Market value (city estimate)
- $7,983,000
- Taxable value
- $3,083,879
- Assessed land
- $287,550
- Assessed improvements
- $3,304,800
Tax breaks
- Co-op and condo abatement, with no end date, a $59,105 credit this tax year.
Zoning
C1-6A: floor area ratio 4.35 built, above the 4.00 base zoning allows, which bonuses, transfers or older rules can permit.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Mar 25, 2026: $1,865,000
- Jan 8, 2026: $3,350,000
- Jul 19, 2024: $560,038
- Jun 24, 2024: $1,275,000
- Dec 14, 2022: $740,000
- Jan 19, 2022: $910,000
- Apr 28, 2017: $875,000
- Jan 19, 2017: $639,000
- Apr 29, 2016: $1,420,000
Open-market sales since 2016, from the Department of Finance’s sales files.