421 Hudson Street, Manhattan
Condominium · 144 units · built c. 1920 · Block 601, Lot 7501.
Building permits
- Alteration, filed Apr 7, 2026, estimated cost $98K, described as “Partial interior renovation to existing 6TH floor apartment #620, to include revisions to existing dining room closet, bedroom 2 and closet. No change to use, occupancy or egress.”
- Alteration, filed Apr 7, 2026, estimated cost $53K, described as “Interior partial-renovation to 6th floor unit # 620 - In conjunction with the OT # M01380366-I1 removal of two existing HVAC units to be replaced with in-kind units.”
- Alteration, filed May 5, 2025, estimated cost $10K, described as “New slap opening at existing roof.”
- Alteration, filed Jan 15, 2025, estimated cost $6K, described as “Construction of fence as per plans attached herewith. No change in use, egress and occupancy.”
- Alteration, filed Jun 17, 2024, estimated cost $253K, described as “Interior renovation of existing apt #820 on the 8th floor. No change to use, egress or occupancy under this application. Plumbing work filed separately.”
- Alteration, filed Jun 17, 2024, estimated cost $20K, described as “Replacing, relocating and removing/capping plumbing fixtures as per plans filed herewith. No change to use, egress or occupancy under this appliaction. General construction filed separately”
- Alteration, filed Jun 17, 2024, estimated cost $400K, described as “Vault replacements. No change to use, occupancy or egress.”
- Alteration, filed Jan 4, 2024, estimated cost $15K, described as “Filing herewith for the mechanical work related to the interior renovation of an existing space. There will be no change in egress, occupancy or use.”
- Alteration, filed Oct 27, 2023, estimated cost $65K, described as “Alt type 2. Demo 2 ex bathrooms and kitchen install 2 full bathroom and new kitchen upgrade and new washer and dryer. No change to use, egress or occupancy. Existing certificate of occupancy does not need to be amended (tppn #397 & local…”
- Alteration, filed Jun 28, 2023, estimated cost $20K, described as “Interior renovation of exisitng apartment and complete work, filed to supersede application # 122742728 for sign off. No change to use, egress or occupancy.”
- Alteration, filed Oct 2, 2022, estimated cost $18K, described as “New plumbing job of apt #701. In conjunction with # M00734590”
- Alteration, filed Aug 1, 2022, estimated cost $10K, described as “Plumbing work at apartment 519 as per plans filed herewith”
- Alteration, filed Aug 1, 2022, estimated cost $109K, described as “Interior renovation of apartment 519 as per plans filed herewith”
- Alteration, filed Aug 1, 2022, estimated cost $10K, described as “Herewith filing Structural Drawings to provide new steel supports to remove interior masonry wall in apartment 519.”
- Alteration, filed May 30, 2022, estimated cost $80K, described as “Interior renovation of apt #701. Cmu bearing wall to be demolished in kitchen area. New structural work. Storage addition at mezzanine level.”
- Alteration, filed Nov 24, 2021, estimated cost $10K, described as “Minor structural work at 7TH floor, apartment 612, apartment mezzanine level. As per plans filed herewith”
- Alteration, filed Nov 18, 2021, estimated cost $97K, described as “Interior renovation of apt 612 as per plans filed herewith”
- Alteration, filed Jul 22, 2021, estimated cost $10K, described as “Removing and capping of existing gas piping.”
- Alteration, filed Mar 15, 2021, estimated cost $22K, described as “Interior removals & renovations to existing duplex residential condominium Unit 817. Modify Mechanical systems accordingly.”
- Alteration, filed Mar 15, 2021, estimated cost $23K, described as “Interior removals & renovations to existing duplex residential condominium Unit 817. Update Plumbing to match new renovations.”
- Alteration, filed Mar 12, 2021, estimated cost $33K, described as “Install structural support for existing floor and stair in unit 817”
- Alteration, filed Mar 9, 2021, estimated cost $426K, described as “Interior removals & renovations to existing duplex residential condominium Unit 817, Associated structural, mechanical, plumbing & electrical filed under separate applications.”
- Alteration, filed Dec 28, 2020, estimated cost $16K, described as “New bathroom consisting of (1) new shower, (1) new toilet and (1) new lav. Renovated bathroom consisting of (1) removed tub, (1) relocated toilet and (1) relocated lav. and (1) new shower. And (1) new washer, (1) relocated sink, (1)…”
- Alteration, filed Dec 17, 2020, estimated cost $14K, described as “Remove existing block bearing wall supporting loft mezzanine and replace with steel header and three (3)steel posts”
- Alteration, filed Dec 1, 2020, estimated cost $120K, described as “Sanitary stack installation. No change in use, egress, or occupancy.”
5 more, older permits are in this building’s full list on the map.
Property taxes
- Assessment
- $39,263,853
- 2026–27 tax
- $4,093,017
- Market value (city estimate)
- $87,253,001
- Taxable value
- $36,433,849
- Assessed land
- $3,849,733
- Assessed improvements
- $35,414,120
- Condo units with their own tax lots
- 157
Tax breaks
- Co-op and condo abatement, with no end date, a $354,243 credit this tax year.
Zoning
M1-5: floor area ratio 8.28 built, above the 5.00 base zoning allows, which bonuses, transfers or older rules can permit.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Jul 28, 2026: $3,100,000, Apt 420
- Jul 27, 2026: $1,840,000, Apt 214
- May 29, 2026: $1,615,000, Apt 213
- Feb 4, 2026: $1,600,000, Apt 308
- Jan 12, 2026: $2,825,000, Apt 318
- Jan 6, 2026: $1,475,000, Apt 524
- Dec 9, 2025: $2,600,000, Apt 320
- Jul 9, 2025: $1,875,000, Apt 216
- Jun 10, 2025: $1,602,295, Apt COM1, sold with other lots
- Apr 23, 2025: $2,275,000, Apt 822
The 10 most recent of 80 open-market sales since 2016, from the Department of Finance’s sales files.
Board and land use applications
- Change to an earlier grant (Board of Standards and Appeals 226-10-BZII): Change to an earlier grant, Dismissed, filed Jan 29, 2021, decided Jul 15, 2022. Extension of Term of a previously approved Special Permit (§73-36) permitting a Physical Culture Establishment (Equinox Fitness) on the first, ninth and tenth floors of an existing 10-story mixed-use building which expired on January 1,…
- Change to an earlier grant (Board of Standards and Appeals 606-75-BZII): Change to an earlier grant, Granted, filed Jul 3, 2013, decided Oct 22, 2013. ADMENDMENT: to permit a reduction in the floor area of the existing units at the site and reallocation of floor to the townhouse units resulting in no net change in total floor area and a reduction of the units.