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| Building size | 237,270 sq ft |
|---|---|
| Stories | 9 |
| Sq ft per floor | 26,363 sq ft |
| Year built | 1988 |
| Lot dimensions | 218 × 189.96 ft |
|---|---|
| Lot area | 45,203 sq ft |
| FEMA flood zone | AE — high risk; flood insurance typically required with a mortgage |
| Units | 183 |
|---|---|
| Zoning | BPC |
| Building class | R0 |
| Ownership | Condominium |
| Block / lot | Block 16 / Lot 7509 |
| Built FAR | 4.31 |
|---|
| Tax class | 2 |
|---|---|
| Rent regulated | Unknown |
Terms on this page, explained →
21 South End Avenue was built in 1988 — roughly 38 years old. This is a condominium of 183 units — each unit is its own tax lot with its own bill. Search with a unit number for unit-level figures. For property-tax purposes it falls under Class 2 (residential buildings with four or more units, condos and co-ops), taxed at 12.439% of a taxable value based on 45% of the city’s income-derived market value.
It sits in FEMA flood zone AE — lenders typically require separate flood insurance here, and real storm exposure runs higher than the effective maps (last remapped citywide in 2007) suggest.
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Data: NYC Department of Finance and Dept. of City Planning (PLUTO) via NYC Open Data. Figures are public records, may lag current bills, and can exclude abatements. Not financial advice.