303 Sixth Avenue
303 Sixth Avenue, between Second and Third streets, Park Slope, Brooklyn
BBL 3009710002 · BIN 3020864
- Year built
- 1920
- Type
- Cooperative
- Landmark
- No
- Amenities
- Shared garden, bicycle storage and storage space
Every recorded sale at this building, 2001–2025
Price-per-square-foot over time, the line- and floor-premium curves, and every recorded sale.
- Median $/sf
- $1,300
- Listing discount
- -1.0%
- Recorded sales
- 10
- On record
- 2001–2025
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A Private Pricing Opinion — what your apartment at 303 Sixth Avenue 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.
About the building
303 Sixth Avenue is a four-residence cooperative in the middle of Park Slope, on the avenue between Second and Third streets. Its prewar apartments share an outdoor garden and storage facilities. The building's existing floor area exceeds the residential FAR now permitted by its zoning, making its current built volume an important part of the property. The cooperative occupies a four-story walk-up.
The homes include layouts with two bedrooms plus an additional room and three-bedroom configurations, with one-and-a-half or two bathrooms. Front living areas and rear bedrooms use opposite ends of the building; garden-facing rooms overlook the interior of the block. Wood-burning fireplaces and hardwood floors survive alongside renovated kitchens and baths. In-unit washers and dryers are present in the apartment inventory. Shared bicycle and household storage provides space beyond the residences themselves.
Recent sales
Recent transfers 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 |
|---|---|---|---|---|---|
| Jul 21, 2025 | 2 | 3 BR · 2 BA | $1,850,000 | +5.7% | |
| Aug 14, 2024 | 4 | 3 BR · 1.5 BA | $1,580,000 | +1.9% | |
| Jun 14, 2021 | 2 | 2 BR · 2 BA · 1,104 sf | $1,435,000 | $1,300/sf | +4.0% |
| Dec 10, 2018 | 1 | 3 BR · 1.5 BA | $1,310,000 | +0.0% | |
| Aug 5, 2016 | 4 | 3 BR | $1,300,000 | +0.0% | |
| Jun 16, 2014 | 2 | 2 BR · 2 BA · 1,104 sf | $1,200,000 | $1,087/sf | +14.3% |
| Aug 15, 2011 | 1 | 2 BR | $810,000 | -0.6% |
Market read. $/sf is measured on the latest sales with reliable square footage (2021): a median $1,300/sf across 1 sale. The building has traded as recently as 2025. Median listing discount -1.0% over ask.
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 3-00971-0002) 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 on co-ops is not officially recorded, figures shown are approximate.
Buying here? Co-op closing costs typically run 2 to 3% of the price. See NYC co-op and condo closing costs, line by line.
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What to know if you’re buying
A shared garden in a four-home cooperative: Use of the garden is a common amenity, so planting, storage and access arrangements affect the other shareholders. An alteration that changes rear access or uses the shared yard needs the cooperative's agreement. The small ownership group also has to allocate the cost of work on the common stairs, roof and façade; an upper-floor purchase includes the daily stair climb through the building.
Comparable buildings
- 240 8th Street — A prewar cooperative with a larger ownership group farther south in Park Slope.
- 904 Union Street — A low-rise cooperative alternative nearer Grand Army Plaza.
- 759 President Street — A substantially larger prewar cooperative for comparing common-building scale while retaining low-rise surroundings.
More Park Slope buildings
- 299 13th Street — 1920 co-op
- 300 8th Avenue, 300 Eighth Avenue — 1920 co-op
- 301 Fifth Avenue — 1920 co-op
- 306 Twelfth Street — condominium
- 309 2nd Street (The Heritage at Park Slope) — 2008 condominium by Karl Fischer Architects
- 309 Sixth Avenue, 309 Sixth Avenue · Park Slope — 1940 co-op
The neighborhood
For the full neighborhood — its buildings, character, and market — read The Roebling Team Guide to Park Slope.
The full playbook — what goes in the package, how boards read your financials, the interview, and the timeline — plus sample cover, reference, and personal letters you can adapt.
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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