721 9th Avenue, Manhattan
Apartment building · 8 units · built c. 1910 · Block 1059, Lot 29.
Building permits
- Alteration, filed Feb 25, 2026, estimated cost $9K, described as “Installation of 300PSF sidewalk shed and pipe scaffolding as per plans. All equipment shall comply with ch #33 of the NYC code 2022. No change in use, occupancy or egress under this application.”
- Alteration, filed Nov 24, 2025, described as “Installation of suspended scaffold for facade inspection/repair.”
- Alteration, filed Oct 10, 2025, estimated cost $142K, described as “Facade repair as per plans filed herewith. No change to use, egress, or occupancy.”
- Alteration, filed Jun 30, 2025, estimated cost $56K, described as “Filing herewith renovation of exisiting apartment as per plans. No change in use, egress or occupancy.”
Property taxes
- Assessment
- $2,555,550
- 2026–27 tax
- $174,265
- Market value (city estimate)
- $5,679,000
- Taxable value
- $1,400,959
- Assessed land
- $1,048,500
- Assessed improvements
- $1,507,050
Zoning
R8: floor area ratio 3.23 built, 6.02 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.