Thornton Park
18 Thornton Street, near Flushing Avenue · Williamsburg
BBL 3022767501 · BIN 3392149
- Year built
- 2006
- Type
- Condominium
- Units
- 14
- Floors
- 7
- Landmark
- No
- Amenities
- Elevator; in-unit laundry appears in the apartment inventory
Every recorded sale at this building, 2008–2025
Price-per-square-foot over time, the line- and floor-premium curves, and every recorded sale.
- Median $/sf
- $661
- Listing discount
- 1.7%
- Recorded sales
- 23
- On record
- 2008–2025
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A Private Pricing Opinion — what your apartment at Thornton Park would likely sell for today, what it costs to sell, and what you’d walk away with — reviewed personally against condition, exposures, renovation quality, and the competition actually on the market.
Thornton Park is a small elevator condominium built in 2006, with fourteen homes distributed within a seven-story building. Its original apartment mix was unusually clear: ten two-bedroom residences with two bathrooms and four one-bedroom apartments. The two categories remain visible in the resale history.
The building also uses the address 721 Flushing Avenue. It sits near the boundary between Williamsburg and Bedford-Stuyvesant, with the Flushing Avenue commercial corridor immediately alongside it. Both residential and nonresidential lots form part of the condominium.
Architecture and unit composition
The smaller one-bedroom homes have recorded areas around 515 square feet. Two-bedroom apartments generally fall around 950 to 1,000 square feet and include two bathrooms. That is a substantial difference in interior area within a building whose total residential inventory is limited.
The original interiors used open kitchens, including island sinks, stone countertops, wood cabinetry and stainless-steel appliances. Two-bedroom layouts provide a larger living area and an additional bathroom without moving into the scale of a full-floor home. Upper-floor apartments occur in both the smaller and larger categories.
Building operations
Elevator access serves the residential floors. The condominium's DOF roll includes fourteen residential lots and ten nonresidential lots, so the residential count is smaller than the total number of legal condominium interests.
Two different tax programs appear on the property. The 421-a program is the residential benefit; ICIP/ICAP applies to the commercial portion. Their start years differ, and the commercial benefit should not be treated as an additional exemption on a residential apartment.
The largest single owner holds three of the fourteen residences, or approximately 21 percent. The other homes are separately owned, and individual residential transfers have continued over more than a decade.
Recent sales
Recent closings at this building, curated by The Roebling Team research desk. Prices are the transfer amounts recorded with the NYC Department of Finance; apartment-level detail is checked against the building’s own file in The Roebling Research Library before publishing.
| Date | Unit | Apartment | Price | PPSF | vs. Ask |
|---|---|---|---|---|---|
| Jan 31, 2025 | 6C | 2 BR · 2 BA · 990 sf | $790,000 | $798/sf | -12.1% |
| Jul 26, 2024 | 7A | 2 BR · 2 BA · 988 sf | $940,000 | $951/sf | -1.1% |
| Aug 21, 2023 | 6C | 2 BR · 2 BA · 990 sf | $770,000 | $778/sf | off-mkt |
| Jul 27, 2022 | 3A | 2 BR · 2 BA · 950 sf | $775,000 | $816/sf | -2.5% |
| Jun 2, 2022 | 5B | 1 BR · 1 BA · 515 sf | $520,000 | $1,010/sf | +4.0% |
| Feb 8, 2022 | 6A | 2 BR · 2 BA · 970 sf | $750,000 | $773/sf | +0.0% |
| Apr 24, 2020 | 4C | 2 BR · 2 BA · 950 sf | $710,000 | $747/sf | -3.9% |
| Jul 15, 2015 | 6B | 1 BR · 515 sf | $440,000 | $854/sf | -2.2% |
Market read. Most recent trades (2025) cleared a median $661/sf across 1 sale. Median listing discount 1.7% from the last ask — a recurring negotiation gap worth pricing into any offer or listing strategy.
The retrade record
Lines that have traded more than once in the public record — the building’s appreciation arc, apartment by apartment.
Full closing history with price-per-square-foot over time, the complete retrade record, and every line that has traded.
Sales sourced from NYC Department of Finance recorded transfers (BBL 3-02276-7501) and verified listing data. Apartment-level facts (line, condition, asking-price context) curated and cross-verified by The Roebling Team research desk. Not all transactions cross-verify with ACRIS records — sponsor and LLC purchases sometimes record at stipulated values rather than market price; square footage from recorded condo declarations and offering plans.
Buying here? Condo closing costs with a mortgage typically run 3 to 6% of the price. See NYC co-op and condo closing costs, line by line.
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Comparable buildings
- 119 Lorimer Street — A nearby condominium with similarly limited residential scale and a tall, narrow form.
- 434 Marcy Avenue — A condominium from the same development period with a somewhat larger inventory.
- 441 Marcy Avenue — A mid-rise condominium offering a related purchase category in the same part of Brooklyn.
- 275 Manhattan Avenue — A similarly sized condominium in a lower-rise building farther north.
- 136 Powers Street — A lower-rise condominium from the same broad development era.
More Williamsburg buildings
- The Oosten (429 Kent Avenue) — 2016 condominium
- The Pad, 196–200 South 2nd Street — condominium
- The Umbrella Factory (710 Metropolitan Avenue) — 1930 condominium
- The Woodpoint, 128–130 Woodpoint Road — condominium
- Two Northside Piers (2 Northside Piers) — 2009 condominium
- Warehouse 11 (214 North 11th Street) — 2009 condominium
The neighborhood
For the full neighborhood — its buildings, character, and market — read The Roebling Team Guide to Williamsburg.
How to read the facts on this page. Items attributed to an offering plan describe the building as it was offered at that filing — unit mix, square footage, the amenity program as planned. They are not a statement about how the building operates today. Tax and compliance figures are sourced separately to current City records and carry their own dates. House rules, staffing and fee policy can change by board resolution without any public filing: treat every policy line here as a starting point for diligence and confirm it with the managing agent. Where this page compares one building or neighborhood to another, that is our analysis of the recorded record — it names the measure, the period and the sample it rests on, and it is an observation about medians rather than a prediction about any particular apartment.
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