121 West 17th Street, Manhattan
Co-op · 28 units · built c. 1909 · Block 793, Lot 22.
Building permits
- Alteration, filed Oct 2, 2026, estimated cost $115K, described as “Proposed interior renovation of 5TH and 6TH floor level. No change in use, egress, or occupancy.”
- Alteration, filed Apr 3, 2025, estimated cost $6K, described as “Replace water source heat pump in cellar”
- Alteration, filed Nov 17, 2023, estimated cost $50K, described as “Installation of heat pump system to be installed indoor and outdoor in exterior areaway of building. No change to use, egress or occupancy.”
- Alteration, filed Aug 4, 2023, estimated cost $29K, described as “Structural filing for sidewalk hatch and hatch framing replacement. No change to egress, use, or occupancy.”
- Alteration, filed Jul 31, 2023, estimated cost $30K, described as “Plumbing modification to apartment 2B for interior renovation. No change to use, egress or occupancy.”
- Alteration, filed Jul 31, 2023, estimated cost $300K, described as “Interior renovation of apartment 2B, removal and instaltion of new non-loadbearing walls, new bedroom, new bathroom remodel of kitchen. No change to use, egress or occupancy.”
- Alteration, filed Jul 31, 2023, estimated cost $50K, described as “Installation of heat pump system to be installed indoor and outdoor on exterior of building under living room window. No change to use, egress or occupancy.”
- Alteration, filed Jul 21, 2023, estimated cost $32K, described as “Minor interior renovation of ext'g bathroom area only in apt. "5B" on the 5TH flr. To include minor partitions to add new powder room and closet off ext'g bedroom. No work in other areas of apt. No change to use, egress or occupancy.”
- Alteration, filed Sep 15, 2022, estimated cost $220K, described as “Replace boiler and oil burner as per plans. Change grade of fuel from #4 to #2 oil. No change in use, egress or occupancy.”
- Alteration, filed Jan 31, 2022, estimated cost $40K, described as “Plumbing work in conjunction with Alteration application under job number m00660900”
- Alteration, filed Jan 31, 2022, estimated cost $131K, described as “Alt type 2 application to renovate apartment 7C on seventh floor. Architectural and plumbing work. No change to use, occupancy, or egress. Plumbing will be filed via DOB now under”
- Alteration, filed Oct 26, 2021, estimated cost $27K, described as “New vrv heat pump HVAC system for residential space. No change in use, occupancy or egress”
- Alteration, filed Feb 15, 2021, estimated cost $20K, described as “Plumbing work in conjunction with general construction application #M00455375”
- Alteration, filed Feb 15, 2021, estimated cost $148K, described as “Alt type 2 application to renovate apartment 6C on sixth floor. Architectural and plumbing work. No change to use, occupancy, or egress. Plumbing will be filed via DOB now under job #M00417423-I1.”
- Alteration, filed Jul 17, 2020, described as “Installation of pipe scaffolding”
- Alteration, filed Nov 6, 2019, estimated cost $5K, described as “Proposed installation of temporary pipe scaffold as per plans. Work shall comply with chapter #33 of the NYC building code. No change in use, occupancy, or egress under this application.”
- Alteration, filed Oct 7, 2019, estimated cost $4K, described as “Proposed installation of heavy duty sidewalk shed as per plans. Live load 300 lbs per square feet. Sidewalk shed shall comply with chapter #33 of the NYC building code. No change in use, occupancy, or egress under this application.”
Property taxes
- Assessment
- $6,114,600
- 2026–27 tax
- $600,963
- Market value (city estimate)
- $13,588,000
- Taxable value
- $5,782,880
- Assessed land
- $666,000
- Assessed improvements
- $5,448,600
Tax breaks
- Co-op and condo abatement, with no end date, a $119,009 credit this tax year.
Zoning
C6-2A: floor area ratio 7.53 built, above the 6.02 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 18, 2026: $1,650,000
- Apr 20, 2023: $1,535,000
- Dec 10, 2021: $1,575,000
- Aug 17, 2018: $1,625,000
Open-market sales since 2016, from the Department of Finance’s sales files.