497 Ninth Street
497 Ninth Street, between Seventh and Eighth avenues · Park Slope
Park Slope, Brooklyn
BBL 3010907503 · BIN 3025890
- Year built
- 1893
- Type
- Condominium
- Amenities
- Individually metered heating and cooling, in-unit laundry, basement storage and roof decks
- Landmark status
- Not an individual landmark; in the Park Slope Historic District Extension
- NYC Landmarks Preservation Commission records, updated February 2026
Every recorded sale at this building, 2007–2026
Price-per-square-foot over time, the line- and floor-premium curves, and every recorded sale.
- Median $/sf, 2026 to date
- $1,841
- 1 sale
- Listing discount
- -0.9%
- Recorded sales
- 9
- On record
- 2007–2026
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at 497 Ninth Street 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
497 Ninth Street began as a flats building designed by Jacob Roth for developer David Atkin around 1893. Its brick and brownstone exterior belongs to a coordinated Renaissance Revival row. The Brooklyn Home Company later converted the property into four condominiums. DOB signed off a rooftop-deck and basement structural alteration in February 2013; the four apartment closings followed in January 2018.
The apartments include a larger lower home and upper floor-throughs with two- and three-bedroom configurations. The roughly 20-by-60-foot floor plates have three exposures. Bay windows, retained tin ceilings and original wood-floor details coexist with individually metered heating and cooling. Basement storage and rooftop outdoor areas supplement the apartments, with deck access and use varying by home.
Building staffing and amenities
- Amenities noted
- Roof deck, storageSource: The Roebling Team's building profile
Staffing and amenities as our building profile and recent listing records describe them. A feature not listed is not confirmed absent. Outdoor space, parking and some facilities can belong to particular apartments or to a separate owner; confirm access for the specific apartment.
Local Law 97
This building is below the 25,000 sq ft threshold at which LL97 limits apply to a building on its own. It is still covered if it shares a tax lot or condominium board with buildings totaling over 50,000 sq ft; confirm on DOB’s covered-buildings list.
See full Local Law 97 analysis →Recent sales
Recent closings at this building, from The Roebling Research Library. 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 8, 2026 | 3 | 3 BR · 2 BA · 1,086 sf | $1,999,000 | $1,841/sf | +3.8% |
| Jan 6, 2023 | 1 | 2 BR · 2.5 BA · 1,999 sf | $2,150,000 | $1,076/sf | -8.5% |
| Nov 6, 2020 | 2 | 3 BR · 2 BA · 1,086 sf | $1,555,000 | $1,432/sf | -1.3% |
| Jan 17, 2018 | 3 | 3 BR · 1,086 sf | $1,527,375 | $1,406/sf | +3.6% |
| Jan 16, 2018 | 2 | 3 BR · 1,086 sf | $1,451,006 | $1,336/sf | — |
| Jan 16, 2018 | 4 | 3 BR · 1,086 sf | $1,425,550 | $1,313/sf | +1.8% |
| Jan 15, 2018 | 1 | 2 BR · 1,999 sf | $2,018,250 | $1,010/sf | +0.9% |
| Aug 1, 2007 | 4 | 3 BR · 1,145 sf | $1,800,000 | $1,572/sf | — |
Market read. Most recent trades (2026 to date) cleared a median $1,841/sf (recorded) across 1 sale. Median listing discount -0.9% 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 3-01090-7503; each condominium apartment is its own tax lot). Apartment-level facts (line, condition, asking-price context) curated and cross-verified in The Roebling Research Library. 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.
What would your apartment rent for?
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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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What to know if you’re buying
Roof decks on a designated building. The rooftop structures were part of a signed-off alteration, but private use and responsibility for the underlying roof are distinct matters. With four homes sharing the structure, the allocation of deck-removal and waterproofing costs can materially affect an exterior project. Future visible alterations also fall within LPC's review of the historic district.
Comparable buildings
- 220 Park Place — A similarly small prewar condominium for comparing ownership scale.
- 412 & 420 Eighth Avenue — A larger low-rise condominium with historic architecture nearby.
- 64 Seventh Avenue — Another nineteenth-century condominium conversion with more homes sharing costs.
- 153 Lincoln Place — A prewar condominium alternative with a larger residential inventory.
More Park Slope buildings
- 481 18th Street — condominium
- 486 Third Street — 2007 condominium
- 489 Seventh Avenue — 1920 condominium
- 500 4 Avenue, 500 Fourth Avenue — 2010 condominium
- 501 8th Avenue — 1910 condominium
- 523–527 Eighth Street, 523 and 527 Eighth Street — 1904 co-op
The neighborhood
For the full neighborhood — its buildings, character, and market — read The Roebling Team Guide to Park Slope.
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.
Considering a move at 497 Ninth Street?
Request a private building brief with the relevant comparable sales, current and off-market availability, and an apartment-specific view of value.
646.939.7375 · c.cohen@compass.com