$440,000 Sold Jun 2026 · Unit 1D
$4,582,000 Assessed value
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| Building size | 14,590 sq ft |
|---|---|
| Building dimensions | 38 × 87 ft |
| Stories | 5 |
| Basement / garden level | Yes — below ground |
| Sq ft per floor | 2,918 sq ft |
| Year built | 1894 |
| Lot dimensions | 37.5 × 102.17 ft |
|---|---|
| Lot area | 3,831 sq ft |
| FEMA flood zone | X — minimal risk |
| Units | 21 |
|---|---|
| Zoning | R8B |
| Building class | D4 |
| Ownership | Co-op building |
| Construction | Brick / 0 (landmarks record) |
| Block / lot | Block 1393 / Lot 27 |
| Built FAR | 3.81 |
|---|---|
| Max residential FAR | 4.00 |
| Max facility FAR | 4.00 |
| Last recorded sale | $440,000 (Jun 2026) |
|---|---|
| Assessed value | $4,582,000 |
| Tax class | 2 |
| Annual property tax | $240,874 |
| Rent regulated | Co-op |
Terms on this page, explained →
51 East 78 Street was built in 1894 — roughly 132 years old. This is a co-op building with 21 apartments — residents own shares in the corporation that owns the building, rather than their apartments outright. Apartments average about 695 sq ft (building area divided by apartment count — individual units vary). 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. The corporation pays one building-wide tax bill — about $240,874 per year — passed to residents through monthly maintenance in proportion to each apartment’s share allocation. A straight average works out to roughly $11,470 per apartment per year, though larger apartments carry more shares (and many primary residents get the co-op/condo abatement on top). The most recent recorded sale in the building was unit 1D, for $440,000 in Jun 2026.
City landmark records describe it as a Vernacular neo-Georgian tenement dating to 1893 - 1894, originally used as residential, multi-family. It was designed by Thom & Wilson for Thomas McLaughlin. It stands within the Upper East Side Historic District.
The building is built out to essentially the full residential density its zoning allows (3.81 of 4.00 FAR), so there is little room to expand under current rules. This lot is associated with a co-op; individual apartments are owned as shares and taxed through the building.
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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.