31 Eighth Avenue
31 Eighth Avenue, Brooklyn, NY 11217
BBL 3010620007 · BIN 3024546
- Year built
- 1888
- Type
- Cooperative
- Units
- 4
- Floors
- 3
- Landmark
- Designated
- Amenities
- Basement storage and bicycle storage
Every recorded sale at this building, 2005–2026
Bedroom-by-bedroom medians, the full transfer record, and how units trade against ask.
- 2BR median
- $1.6M
- Recent range
- $1.5M – $1.6M
- Listing discount
- -4.4%
- Recorded transfers
- 11
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About the building
31 Eighth Avenue belongs to an 1888 row of substantial Romanesque Revival houses designed by Charles Werner for builder William Gubbins. Its entrance is reached by an L-shaped stoop, with an arched doorway and columns framing the entry. A projecting bay rises through two stories, while small attic windows sit below the roof cornice. The house forms part of the original Park Slope Historic District, on the avenue block south of Lincoln Place.
The cooperative occupies a former single house with floor-through apartments above its lower level. Interior features include high parlor ceilings, stained glass, wood shutters, fireplaces and patterned wood floors. The lower space has a history of medical-office use, while residential apartments occupy the upper floors. Basement storage and bicycle storage serve the small building.
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 | vs. Ask |
|---|---|---|---|---|
| Jan 29, 2026 | 5 | 2 BR · 2 BA | $1,650,000 | +12.6% |
| Jul 11, 2025 | 3 | 2 BR · 1.5 BA | $1,550,000 | +4.4% |
| Mar 21, 2025 | 2 | 2 BR · 1 BA | $1,475,000 | +0.0% |
| Jan 7, 2020 | 5 | 2 BR · 2 BA | $1,200,000 | +9.2% |
| Jun 28, 2017 | 3 | 2 BR · 1.5 BA | $1,190,000 | +8.2% |
| Jan 22, 2016 | 1 | 2 BR | $820,447 | -6.2% |
| Nov 25, 2015 | 2 | 2 BR · 1 BA | $1,290,000 | +18.9% |
| Jun 9, 2015 | 5 | 1 BR | $805,000 | -18.4% |
Market read. Median listing discount -3.7% 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 3-01062-0007) 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.
At the recent median sale of $1.55M (3 transfers since 2024), a buyer putting 25% down would pay about $29,863 to close, or 1.9% of the price.
- Mansion tax: $15,500
- No mortgage recording tax or title insurance on a co-op purchase
- Attorneys, lender, building fees and filings: $14,363
Assumes a resale (the seller pays transfer taxes), a $4,500 attorney fee and a mortgage on the rest.
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What to know if you’re buying
The former medical space makes legal use especially important at the garden level: a residential floor plan does not by itself establish permission to occupy former office space as a dwelling. Confirm whether the cooperative is currently self-managed and how its small shareholder group assigns responsibility for building decisions.
Comparable buildings
- 904 Union Street: A nearby prewar walk-up cooperative with a larger apartment inventory.
- Sterling Atrium: A small cooperative conversion with an unusual two-building configuration.
- 18 West 87th Street: A farther townhouse-cooperative peer with landmark protection and walk-up access.
More Park Slope buildings
- 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
- 313 Sixth Avenue — 1935 co-op
- 327 4th Street — 1920 co-op
- 340 11th Street — 1991 condominium
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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