409 Third Street
409 Third Street, between Fifth and Sixth Avenues · Park Slope
BBL 3009757501 · BIN 3250822
- Year built
- 1921
- Type
- Condominium
- Landmark
- No
- Amenities
- In-home laundry; central air conditioning in renovated homes; private roof access associated with the top residence
Every recorded sale at this building, 2008–2026
Price-per-square-foot over time, the line- and floor-premium curves, and every recorded sale.
- Median $/sf
- $2,156
- Listing discount
- 3.5%
- Recorded sales
- 7
- On record
- 2008–2026
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at 409 Third 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
409 Third Street is a four-home condominium in a Park Slope brownstone. Its bay-windowed frontage faces the broad Third Street block between Fifth and Sixth Avenues. The building rises four stories, with individual condominium ownership established by the late 2000s. The tax lot is outside the Park Slope historic districts.
The residences include three-bedroom floor-through layouts with north and south exposures. The street-facing bay widens the living area, while rear rooms overlook the block's gardens. At the top, skylights add overhead light and private roof rights accompany the residence. Renovated apartments have incorporated central air conditioning and laundry within the older building.
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 |
|---|---|---|---|---|---|
| Aug 12, 2026 | 4 | 3 BR · 2 BA · 1,125 sf | $2,425,000 | $2,156/sf | -5.8% |
| Dec 3, 2018 | 3 | 3 BR · 2 BA · 1,125 sf | $1,346,000 | $1,196/sf | -23.1% |
| Aug 13, 2015 | 2 | 3 BR · 2 BA · 1,300 sf | $1,550,000 | $1,192/sf | +14.9% |
| May 14, 2010 | 1G | 1,002 sf | $905,000 | $903/sf | off-mkt |
Market read. Most recent trades (2026) cleared a median $2,156/sf across 1 sale. Median listing discount 3.5% from the last ask — a recurring negotiation gap worth pricing into any offer or listing strategy.
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 3-00975-7501) 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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What to know if you’re buying
The top home's roof access makes the distinction between private deck obligations and the condominium's roofing work particularly important. Four owners fund the common structure, and the agreement governing access during repairs can affect both the upper residence and the association's ability to maintain the roof.
Comparable buildings
- 220 Park Place — A four-residence condominium in a converted prewar building, with a similarly small ownership group.
- 153 Lincoln Place — A historic conversion with more homes sharing the condominium's expenses.
- 64 Seventh Avenue — A nineteenth-century residential conversion offering condominium ownership in older Park Slope architecture.
More Park Slope buildings
- 40 Prospect Park West — 1942 co-op
- 400 3rd Street — 1920 co-op
- 404 3rd Street — co-op
- 41 Park Place — condominium
- 412 & 420 Eighth Avenue, 412 and 420 Eighth Avenue — 1920 condominium
- 415 9th Street — 1912 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.
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