309 2nd Street (The Heritage at Park Slope)
309 2nd Street, Brooklyn, NY 11215
BBL 3009697503 · BIN 3393447
- Year built
- 2008
- Type
- Condominium
- Units
- 21
- Floors
- 4
- Landmark
- No
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at The Heritage at Park Slope 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.
The number that defines this building is 2034. The 421-a exemption here is a 25-year benefit, not the 10- or 15-year term more common on Brooklyn condominiums of this vintage, and on the 2026/27 roll it still exempts all of each apartment's assessed value above a small pre-construction base. Owners have eight more years before the step-down starts. A buyer today is paying taxes that are a fraction of the building's full-tax bill, and that gap is the single largest carrying-cost fact on the page.
The second fact is how the building was made. The sponsor did not build from the ground up. DOB's 2006 filing took an existing two-story building with commercial occupancy on a 115-foot-wide lot, converted it to 21 apartments and added two floors. The ground floor became five duplexes that run down to cellar rooms; the upper floors hold two-bedroom apartments; the roof was divided into private terraces and cabanas. The result is a low, wide four-story building on a mid-block side street, with more private outdoor space per apartment than most Park Slope condominiums of its size.
The third is that the sponsor is gone. Park Slope Heritage Development Corp. closed 15 residences between July and October 2008 and transferred the other six to Heritage Housing Group, LLC, the successor sponsor, in December 2008. That entity sold them one at a time between 2010 and 2014; its April 2014 amendment reported one residence and one parking space left, both under contract, and the last residence closed that month per ACRIS. On the 2026/27 roll every residential lot is held by a separate owner.
Architecture and unit composition
The offering plan describes one building of four floors and a cellar on the north side of 2nd Street, with the parking entered from a curb cut about 226 feet east of Fourth Avenue. The street elevation carries a cast-stone cornice; the other elevations have metal coping.
Ground floor. Units 1A through 1E are one-bedroom duplexes with a private stair to a cellar room and a cellar bathroom, per Amendment 2. The plan finishes those cellar rooms in vinyl composition tile. Count the cellar space as what it is — below-grade flex and storage area — and do not price it as a bedroom. 1D and 1E have ground-level yards with lawn, which their owners maintain, plus smaller terraces.
Upper floors. Floors two through four hold the two-bedroom, two-bath lines, from about 940 to 1,190 square feet per the plan, and the one one-bedroom, 2B. Several upper units have private terraces of roughly 200 to 830 square feet; others have balconies of about 95 square feet. Unit 4B is a duplex spanning the third and fourth floors, which is why the third floor has no B line.
Roof. Private roof terraces and rooftop cabanas, divided by six-foot wood privacy screens, finished in concrete pavers on pedestals.
Unit areas and terrace areas in the plan and on the Department of Finance roll differ by small amounts for several lines. Confirm the area and the outdoor space for any specific unit against the declaration and floor plans.
Building operations
The 421-a, with the years. Department of Finance code 5114 sits on all 32 lots. The benefit began in 2009/10, so 2026/27 is year 18. Under the 25-year schedule the exemption stays at 100 percent of the increase over the base through 2029/30, then steps down to 80 percent in 2030/31, 60 percent in 2031/32, 40 percent in 2032/33 and 20 percent in 2033/34. From July 1, 2034 owners pay full tax. The Department of Finance file does not state why this building received the 25-year term rather than a 15-year term; the portions of the plan reviewed do not explain it either. Ask for the unit's Notice of Property Value and model both the current bill and the 2034/35 bill.
Size and management. The Heritage is a small, professionally managed condominium with one passenger elevator and an accessibility lift, both current on DOB inspection records. The most recent budget and audited statements on file date from the 2014 amendment. They show a modest operating budget and a reserve in the tens of thousands of dollars, and the budget states that capital projects must be funded by special assessment or from reserves. Those figures are twelve years old. Ask the managing agent for the current budget, reserve balance and any assessments.
Sponsor-era rentals. The 2014 amendment reported that the sponsor was renting its last unsold residence pending sale. That residence has since closed; no sponsor inventory remains.
Recent sales
The Heritage trades as late-2000s Park Slope condominium stock, priced per square foot, with one feature that separates it from most of its peers: a full 421-a benefit that runs into the next decade. Resale turnover is thin — a 21-residence building with owners who have held for years — and recent recorded sales are few. Within the building, value turns on outdoor space (the yards on 1D and 1E, the terraced upper lines, the roof terraces), on whether a ground-floor duplex's cellar level is counted honestly, and on parking, which is sold as a separate unit.
Through 2025 the tax benefit was a large part of each apartment's value against fully taxed buildings nearby. That component shrinks year by year once the phase-out starts in 2030/31. Unit-level transaction history is maintained in The Roebling Research Library and shared with clients during diligence.
The retrade record
Lines that have traded more than once in the public record — the building’s appreciation arc, apartment by apartment.
Recent closings at this building, sourced from NYC Department of Finance records. Apartment-level detail (line, condition, asking-price context) verified upon consultation request.
| Date | Unit | Price |
|---|---|---|
| Sep 9, 2025 | 2F | $1,660,000 |
| Jul 8, 2024 | 3F | $1,320,000 |
| Jul 27, 2023 | 4A | $1,615,000 |
| Feb 9, 2023 | 3A | $1,605,000 |
| Jul 12, 2022 | P9 | $1,525,000 |
| Apr 7, 2022 | 2B | $982,500 |
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 3-00969-7503) 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.
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
Underwrite two tax bills. Today's bill reflects the full 421-a. Model the 2034/35 full-tax bill too, and know where the step-down falls within your hold.
Treat the cellar as cellar. On the ground-floor duplexes, the lower level is below-grade flex space, not a legal bedroom.
Parking is a separate unit. The 11 spaces are their own tax lots with their own common charges and their own 421-a. Confirm whether the space you want conveys with the apartment.
Get current financials. The documents on file are from 2014. Request the current budget, the reserve balance, any special assessments and the board minutes.
What to know if you’re selling
Present the tax schedule. Buyers will ask about the 421-a. Give them the Department of Finance code, the 2009/10 start, and the 2030/31–2033/34 step-down; it answers the question before it is raised.
Measure the outdoor space. Terraces, yards and roof cabanas are the building's distinction. Use the plan's measurements and photograph them.
Describe the duplexes accurately. Market the cellar level as flex and storage space. An accurate description holds up through the buyer's diligence.
Comparable buildings
If you're considering The Heritage at Park Slope, also evaluate:
- 251 1st Street — 2015 condominium one block north at Fourth Avenue, on a 15-year 421-a; the newer, larger neighbor
- 155 15th Street — 21 residences and 11 garage units between Fourth and Fifth Avenues; the same scale on a 15-year 421-a in its final year
- 279 Prospect Avenue — 20 residences and 11 parking units on a 25-year 421-a now in its phase-out; the closest tax-structure comparison, a few years further along
- 251 7th Street — 2009 Fourth Avenue condominium whose 15-year 421-a has run out
- 243 4th Avenue — Fourth Avenue condominium with no 421-a; the full-tax benchmark
- 190 Garfield Place — conversion of a 1905 building in the historic district; the older-building alternative
- 444 12th Street — industrial loft conversion with parking; another adaptive-reuse condominium in the neighborhood
More Park Slope buildings
- 276 13th Street (5 One 5 Condominiums) — 2008 condominium
- 279 Prospect Avenue — 2004 condominium
- 300 8th Avenue, 300 Eighth Avenue — 1920 co-op
- 343 4th Avenue (Novo), 343 Fourth Avenue — 2006 condominium
- 35 Prospect Park West — 1929 co-op by Emery Roth
- 350 Butler Street — 2021 condominium
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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