$2,635,000 Sold Jun 2026
$2,724,000 Assessed value
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| Building size | 6,608 sq ft |
|---|---|
| Building dimensions | 23.5 × 70 ft |
| Stories | 4 |
| Sq ft per floor | 1,652 sq ft |
| Year built | 1940 |
| Lot dimensions | 23.5 × 97.83 ft |
|---|---|
| Lot area | 2,299 sq ft |
| Units | 4 |
|---|---|
| Zoning | R6B |
| Building class | C6 |
| Block / lot | Block 976 / Lot 7 |
| Built FAR | 2.87 |
|---|---|
| Max residential FAR | 2.00 |
| Max facility FAR | 2.00 |
| Last recorded sale | $2,635,000 (Jun 2026) |
|---|---|
| Assessed value | $2,724,000 |
| Tax class | 2C |
| Annual property tax | $25,924 |
| Rent regulated | Co-op |
309 6 Avenue was built in 1940 — roughly 86 years old. 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. At the current assessment that works out to about $25,924 per year ($2,160/month) before any abatements or exemptions the owner may receive. City records show it last changed hands for $2,635,000 in Jun 2026.
The building already exceeds what current zoning would allow (2.87 built FAR vs. a maximum of 2.00) — typically a grandfathered or overbuilt structure that could not be rebuilt to this size under today’s rules. This lot is associated with a co-op; individual apartments are owned as shares and taxed through the building.
All recent NYC sales · Brooklyn property taxes
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.