312 West 23rd Street, Manhattan

Condominium · 77 units · built 1948 · Block 746, Lot 7506.

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Building permits

Alteration, filed Nov 3, 2025, estimated cost $14K, described as “Removal and installation of interior non-load bearingpartitions, doors and associated finishes. No changein use, occupancy or egress.”
Alteration, filed Sep 12, 2024, estimated cost $14K, described as “Removal and installation of interior non-load bearingpartitions, doors and associated finishes. No changein use, occupancy or egress.”
Alteration, filed Jun 29, 2023, estimated cost $14K, described as “Removal and installation of interior non-load bearingpartitions, doors and associated finishes. No changein use, occupancy or egress.”
Alteration, filed Nov 27, 2019, estimated cost $15K, described as “Proposed interior renovation at the partial first floor & cellar of an existing commercial space to include new mechanical systems.”
Alteration, filed Nov 26, 2019, estimated cost $44K, described as “Proposed interior renovation at the partial first floor & cellar of an existing commercial space to includenew plumbing fixtures.”

Nonprofit exemption (charitable), with no end date, about $21,552 a year below the full tax.
Co-op and condo abatement, with no end date, a $5,637 credit this tax year.

C1-6A: floor area ratio 3.66 built, 4.00 allowed by base zoning.

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

The 10 most recent of 14 open-market sales since 2016, from the Department of Finance’s sales files.