- Type
- Condominium
- Landmark
- No
- Amenities
- Private outdoor space for every residence; central air conditioning and in-home laundry
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at 345 Warren 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
345 Warren Street is a four-home condominium created through the redevelopment of an 1899 Boerum Hill townhouse. The Attorney General accepted its offering in August 2024. DOB signed off the alteration in August 2026. The work produced four two-bedroom residences across a four-story building. The sponsor is 345 Warren Owner LLC.
Outdoor space is distributed across the entire inventory. A lower duplex has a private garden, and the home above it has a deck with stairs down to its own garden area. The two upper floor-through residences each have a private half of the roof deck. Those upper homes measure about 910 to 915 square feet, while the lower duplex spans approximately 1,652 square feet over two levels. Central air conditioning, new double-pane windows and in-home laundry accompanied the redevelopment.
Recent sales
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 |
|---|---|---|
| May 1, 2026 | 1 | $1,750,000 |
| Mar 23, 2026 | 2 | $1,650,000 |
| Feb 20, 2026 | 3 | $1,490,000 |
| Feb 2, 2026 | 4 | $1,490,000 |
| Jan 12, 2024 | — | $2,750,000 |
| Apr 17, 2017 | — | $2,300,000 |
Sales sourced from NYC Department of Finance recorded transfers (BBL 3-00391-7507) 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 $1.65M (4 sales since 2024), a buyer putting 25% down would pay about $69,237 to close, or 4.2% of the price.
- Mansion tax: $16,500
- Mortgage recording tax: $23,822
- Title insurance: $7,425
- Attorneys, lender, building fees, reserves and filings: $21,490
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 roof is divided for private use while protecting the whole building. Each upper home's deck rights need to be paired with responsibility for access, decking, drainage and repairs to the underlying roof. The two separate garden areas create a similar allocation question at the rear. These expenses are governed within a four-owner association, which a purchase lender must also accept.
Comparable buildings
- 220 Park Place: A similarly small condominium in a converted prewar building.
- 497 Pacific Street: A low-rise prewar condominium with a larger association.
- The Westcott: A nearby condominium for comparing building scale and shared services.
More Boerum Hill buildings
- 320 State Street — 1847 co-op
- 323 Bergen Street (Bergen Brooklyn) — 2023 condominium
- 345 Bergen Street — 2023 condominium
- 354 Baltic Street — co-op
- 356 Baltic Street — 2017 condominium
- 378 Baltic Street — 2007 condominium
The neighborhood
For the full neighborhood — its buildings, character, and market — read The Roebling Team Guide to Boerum Hill.
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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