8 Union Square South, Manhattan
Condominium · 20 units · built 2006 · Block 571, Lot 7505.
Building permits
- Alteration, filed Jun 23, 2026, estimated cost $120K, described as “Herewith filing for apartment renovation. Modification of interior partition, door and ceiling as shown on plans. No change to use, egress or occupancy”
- Alteration, filed Jul 18, 2024, estimated cost $100K, described as “Install replacement boilers as per plans. No change to use, occupancy or egress.”
- Alteration, filed May 15, 2023, estimated cost $31K, described as “Lighting upgrades for Bank of America existing branch. No change to use, egress or occupancy.”
- Alteration, filed Aug 13, 2020, estimated cost $4K, described as “Installation of a temporarily 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 Jul 16, 2020, estimated cost $4K, described as “Installation of a 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.”
- Alteration, filed Aug 19, 2019, estimated cost $40K, described as “Replace existing water source heat pump,and related duct in lobby on the 1st floor. no change in use,egress and occupancy.”
Property taxes
- Assessment
- $11,850,934
- 2026–27 tax
- $1,206,236
- Market value (city estimate)
- $26,335,401
- Taxable value
- $10,763,822
- Assessed land
- $774,010
- Assessed improvements
- $11,076,924
- Condo units with their own tax lots
- 21
Tax breaks
- Co-op and condo abatement, with no end date, a $37,598 credit this tax year.
Zoning
C6-4: floor area ratio 10.39 built, above the 10.00 base zoning allows, which bonuses, transfers or older rules can permit.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Aug 21, 2026: $1,580,000, Apt 2B
- Feb 20, 2026: $4,875,000, Apt 1314A
- Nov 17, 2022: $3,790,000, Apt 5A
- Feb 6, 2019: $2,500,000, Apt 7B
- Aug 8, 2018: $2,698,362, Apt 4B
- Aug 8, 2018: $2,650,000, Apt 6B
- Mar 16, 2017: $9,200,000, Apt 1112A
- Feb 15, 2017: $2,500,000, Apt 5B
- Sep 1, 2016: $2,665,000, Apt 7B
- Aug 8, 2016: $3,650,000, Apt 5A
The 10 most recent of 11 open-market sales since 2016, from the Department of Finance’s sales files.