The Dean Boerum Condominium (40 Dean Street)
40 Dean Street, Brooklyn, NY 11201
BBL 3001937501 · BIN 3348480
- Year built
- 2002
- 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 Dean Boerum Condominium 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 Dean Boerum Condominium combines three things that are hard to find together on these blocks: new-construction condominium ownership, deeded garage parking, and a low-rise scale that fits the brownstone streets around it. It is three attached buildings wrapping the corner of Dean Street and Boerum Place, with 21 apartments over garden, second and third floors and a private garage of ten deeded spaces. It sits just west of Smith Street, where Cobble Hill and Boerum Hill meet, and a few blocks from Atlantic Avenue.
It is also the oldest condominium on its block. The declaration was recorded in July 2002, and the sponsor was closing units by the end of that month. The block later added a second, larger condominium at 52 Dean Street, and the 56-unit loft conversion at 120 Boerum Place holds the opposite blockfront. The Dean Boerum is the smallest and earliest of the three.
The tax record is the fact buyers need to get right. The building was built under a 15-year 421-a exemption, phased by building. The Boerum Place buildings' benefit ended with the 2017/18 year and 40 Dean Street's with 2018/19. Every apartment now pays full taxes. Sales before 2019 were priced against abated bills.
Architecture and unit composition
The three buildings share one condominium and one tax-lot series but read as separate addresses. 40 Dean Street and 123 Boerum Place each hold eight apartments (G1, G2, 2A–2C, 3A–3C). 125 Boerum Place holds five (G1, 2A, 2B, 3A, 3B). Apartment sizes on the Department of Finance roll run from under 600 square feet to over 2,600 square feet. The largest are the garden-level G units, at roughly 1,300 to 2,600 square feet, which points to multi-level layouts. PLUTO's four floors against three apartment designations is consistent with that, but the public record doesn't break it out. Confirm layout and any private outdoor space unit by unit.
The ten garage lots and one storage lot are separate condominium units with their own deeds and tax bills. Several are held by owners who also own apartments in the building, and a few by small holding entities. One garage space for roughly every two apartments makes deeded parking a scarce resale feature here.
Building operations
The condominium is professionally managed. No offering plan, budget or financial statement for the building is on file in The Roebling Research Library, so reserves, capital history and any open assessment have to come from the managing agent. The building's Department of Buildings history is light — a 2019 interior renovation filing at 123 Boerum Place is the most recent job. Ask for the façade inspection status and the garage's maintenance history as part of diligence.
A records note: the Department of Finance still lists the sponsor entity as owner of one residential lot (Unit 2B at 125 Boerum Place). ACRIS shows that unit deeded out by the sponsor and resold to a private buyer in 2005. We found no remaining sponsor inventory.
Recent sales
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 |
|---|---|---|
| Jun 10, 2025 | 2C | $1,350,000 |
| Jan 12, 2022 | G2 | $1,845,000 |
| Oct 15, 2020 | 2A | $932,000 |
| Nov 19, 2015 | 2C | $935,000 |
| Aug 3, 2015 | 2A | $905,000 |
| Jun 24, 2015 | G2 | $1,625,000 |
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 3-00193-7501) 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.
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 full taxes. The 421-a benefit has expired on every lot. Pull the current bill for the specific unit.
Treat the garage space as its own asset. A deeded garage unit carries its own deed, tax lot and common charge. Confirm whether one is included, and if not, whether any are available.
Get the documents early. With no plan or financials on file publicly, request the by-laws, the current budget, the last two years of audited statements and the house rules before contract. They settle pets, leasing, any right of first refusal and the building's capital position.
Comparable buildings
If you're considering The Dean Boerum Condominium, also evaluate:
- 120 Boerum Place — the 56-unit loft conversion with 15 garage units directly across Boerum Place; the same block, a different product
- 88 Wyckoff Street (Wyckoff House) — 42-unit 1986 conversion two blocks southeast at Smith and Wyckoff
- 457 Atlantic Avenue — 21-residence ground-up condominium from 2004 in Boerum Hill; matching unit count
- 556 State Street (Boerum Heights) — 71-unit new construction from 2006; the larger Boerum Hill condominium of the same era
- 118 Union Street — 32-residence low-rise condominium from 1990 with commercial space; the earlier low-rise precedent
- 1 Tiffany Place — 70-unit factory conversion with 14 parking units; condominium ownership with deeded parking
- 529 Court Street (The Terraces at Court Street) — 2000s ground-up condominium with parking and an expired 421-a in southern Carroll Gardens
More Cobble Hill buildings
- 47 Dean Street — 2011 condominium
- 5 River Park (347 Henry Street) — 2017 condominium
- 501 Hicks Street (Cobble Hill School Condominium) — 1922 condominium
- 58 Strong Place (The Landmark at Strong) — 1851 condominium
- 78 Amity Street (The Cobble Hill House) — 2018 condominium
- The Arches at Cobble Hill (401 Hicks Street) — new-construction condominium
The neighborhood
For the full neighborhood — its buildings, character, and market — read The Roebling Team Guide to Cobble 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.
Considering a move at The Dean Boerum Condominium?
Request a private building brief with the relevant comparable sales, current and off-market availability, and an apartment-specific view of value.