- Year built
- 1908
- Type
- Condominium
- Units
- 85
- Floors
- 11
- Landmark status
- Not an individual landmark; in the DUMBO Historic District
- NYC Landmarks Preservation Commission records, updated February 2026
- Pets
- Pets permitted with conditions; species not stated
- Washer/dryer
- Permitted
- Flip tax
- None
- Doorman
- Full-time doorman
Every recorded sale at this building, 2004–2026
Price-per-square-foot over time, the line- and floor-premium curves, and every recorded sale.
- Median $/sf, 2026 to date
- $1,124
- floor-adjusted, 8 sales
- Listing discount
- 3.6%
- Recorded sales
- 133
- On record
- 2004–2026
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at The Sweeney Building 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 Sweeney Building is the middle chapter of DUMBO's conversion story — after the Clock Tower proved the market in 1998 and before 70 Washington scaled it in 2005, Two Trees converted the 1908 factory at Main and Water Streets into the neighborhood's second generation of lofts, with the condominium declaration recorded in December 2002 and closings following from 2003. In the neighborhood's now-standard division between authentic industrial conversions and new-development condominiums, the Sweeney occupies the position many buyers end up wanting most: true daylight-factory bones, boutique scale, and a short walk to Brooklyn Bridge Park.
The building's industrial history broadens the Gairville narrative. Unlike its neighbors at 1 Main and 70 Washington — both built for Robert Gair's paper-box empire by the Higginson/Turner team — 30 Main Street was erected in 1908 by the Moyer Engineering & Construction Company for the W. H. Sweeney Manufacturing Company, a Brooklyn metalware maker. It belongs to the same pioneering generation of reinforced-concrete factory construction that made DUMBO nationally significant: concrete frames carrying the loads, window bays opened wide for daylight, and — in the Sweeney's case — a façade whose concrete piers are articulated to imitate rusticated stone, the detail the LPC's designation report singles out. The result is a factory that dressed its engineering in civic clothes a full decade before that became conventional.
The conversion gave DUMBO some of its most livable lofts: high ceilings, oversized industrial window bays, and floor plates scaled so that typical units get corner or multiple exposures rather than bowling-alley depth. Upper floors carry the exposures that define the neighborhood's imagery — the Brooklyn Bridge to the west, the Manhattan Bridge to the east, the skyline across the river — and the penthouse tier at the top of the building trades as trophy product when it trades at all.
Position completes the argument. The building sits one short block from the Main Street entrance to Brooklyn Bridge Park, across the intersection from the Clock Tower, in the heart of the DUMBO Historic District (designated December 18, 2007). Within the conversion tier, the Clock Tower has the iconography, 70 Washington has the scale and liquidity, and the Sweeney has the park.
Architecture and unit composition
The Sweeney is an 11-story Industrial Neoclassical daylight factory on a corner site, which matters more than it sounds: corner siting means two full window façades, and in a concrete-frame building with oversized bays, that translates directly into the light and view volume that loft buyers pay for. The rusticated-stone articulation of the piers gives the building a more finished street presence than most of its factory peers.
The 85 residences run from one-bedroom lofts through three-bedroom corner spreads and a penthouse tier. Characteristic attributes: ceilings in the high-and-genuinely-lofty range, oversized multi-pane windows, and the concrete structure expressed in many interiors. Because the building is boutique-scale, most lines exist in small numbers — which supports pricing on scarcity but thins the comparable set for any given unit type.
Published unit counts for the building vary slightly (city records tabulate 85; some published counts run a few units higher, reflecting combinations and penthouse configurations over the years). The offering plan and recorded declaration control, and The Roebling Research Library maintains the reconciliation.
Building operations
The Sweeney operates as a serviced boutique condominium — attended lobby service, fitness room, and common roof terrace are the publicly documented amenity set. Two Trees Management Co. was associated with the building from conversion; current management should be confirmed with the board during diligence, and The Roebling Team remains the contact of record for clients. As with every building inside the DUMBO Historic District, exterior and window work requires LPC approval, and buyers should review the current Local Law 11 cycle and capital plan as part of standard diligence at a 1908 concrete structure.
Application and transaction fees
Fees below are from building management's published schedule, as of October 2026. They are shown as published, item by item; no total is added because the total depends on the transaction. Deposits are listed apart from nonrefundable charges.
- Terms
- None publicly documented; confirm against the offering plan and amendments during diligence
Source: The Roebling Team's building profile
Purchase
8 items
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Application Processing Fee | Paid by Buyer | When With the application | Amount $700 | Refundable Non-refundable |
| Credit Check FeePer applicant | Paid by Buyer | When With the application | Amount $150 per applicant | Refundable Non-refundable |
| Move-In Fee | Paid by Buyer | When With the application | Amount $1,500 | Refundable Non-refundable |
| Final Electric Reading Fee | Paid by Seller | When With the application | Amount $250 for one bedroom or smaller, $500 for two bedroom or larger | Refundable Not stated |
| Move-Out Fee | Paid by Seller | When With the application | Amount $1,500 | Refundable Non-refundable |
| Working Capital Contribution Fee | Paid by Seller | When At closing | Amount 0.5% of the sales price for Units owned by a Unit Owner for equal to or more than 10 years. 0.75% of the sales price for Units owned by a Unit Owner for equal to or more than 5 years, but less than 10 years. 1.0% of the sales prices for Units owned by a Unit owned by a Unit Owner for Less than 5 years. | Refundable Not stated |
Deposits
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Move-In Deposit | Paid by Buyer | When With the application | Amount $500 | Refundable Refundable |
| Move-Out Deposit | Paid by Seller | When With the application | Amount $500 | Refundable Refundable |
Rental or lease
8 items
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Annual Leasing FeeRecurring | Paid by Landlord | When With the application | Amount Equal to one month's common charges | Refundable Not stated |
| Application Processing Fee | Paid by Tenant | When With the application | Amount $700 | Refundable Non-refundable |
| Credit Check FeePer applicant | Paid by Tenant | When With the application | Amount $150 per applicant | Refundable Non-refundable |
| Move-In Fee | Paid by Tenant | When With the application | Amount $1,500 | Refundable Non-refundable |
| Move-Out Fee | Paid by Tenant | When With the application | Amount $1,500 | Refundable Non-refundable |
| Move-Out FeeConditional | Paid by Landlord | When Upon approval | Amount $1500 if applicable | Refundable Non-refundable |
Deposits
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Move-In Deposit | Paid by Tenant | When With the application | Amount $500 | Refundable Refundable |
| Move-Out DepositConditional | Paid by Landlord | When Upon approval | Amount $500 if applicable | Refundable Refundable |
Management updates its schedule without a public filing. The date is when management last updated the page, not when a rule changed. Confirm the current schedule with management before you apply.
Considering an apartment here? Send Corey the listing to discuss the building's costs and purchase requirements.
Own an apartment here? Request an apartment-specific pricing review.
Sublet and pied-à-terre policy
A condominium owner leasing a unit and a co-op shareholder subletting are different rules, and a building-wide rule is different from a restriction on one apartment. This is the building's rule; confirm it for the specific apartment.
- Leasing by owners
- Not verified
- Short-term rentals
- Not permittedSource: building management's published schedule, as of October 2026
- Pied-à-terre ownership
- Not verified
Considering an apartment here? Send Corey the listing to discuss the sublet and pied-à-terre rules for that apartment.
Pets and in-unit washer/dryer
- Pets
- Pets permitted with conditions; species not statedPet Policy noted in House RulesSource: building management's published schedule, as of October 2026
- In-unit washer/dryer
- PermittedSource: building management's published schedule, as of October 2026
Considering an apartment here? Send Corey the listing to confirm the pet and washer/dryer rules for that apartment.
Monthly carrying charges in recent sales
- Common charges + taxes, per room
- $690 per room a monthMedian of 16 recorded sales since October 2023Source: recorded sales, refreshed October 2026
- Common charges + taxes, per square foot
- $2.07 per square foot a monthMedian of 17 recorded sales since October 2023Source: recorded sales, refreshed October 2026
Common charges plus real estate taxes, combined into one monthly figure the way New York condominium listings show them. Add a mortgage payment for the monthly outlay. A summary of recorded sales, not a current bill; charges change.
Building staffing and amenities
- Doorman
- Full-time doormanSource: recent listing records
- Concierge
- YesSource: recent listing records
- Attended lobby
- YesSource: The Roebling Team's building profile
- Elevator
- YesSource: NYC Department of Buildings elevator records
- Amenities noted
- Fitness room, roof deckSource: 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
- 2024–2029 annual penalty
- $0 (under cap)
- 2030–2034 annual penalty
- $59,194/yr
- Per unit / month range
- $0 – $58
- Modeled exposure split equally across 85 units (the residential count on the city's lot record). Not an assessed amount; condominium owners are typically charged by each unit's common-interest percentage.
Source: NYC LL84 benchmarking and PLUTO · The Roebling Research Library. City data last refreshed October 2026.
See full Local Law 97 analysis — emissions history, scenarios, methodology →Facade safety — Local Law 11
The latest available filing classified the facade as SWARMP — Safe With A Repair and Maintenance Program: the inspector (QEWI) identified conditions requiring monitoring or repair, with repairs due by the deadline stated in the filing. The scope, timeline, and how the building funds the work are building-specific — we review the filings and board materials for you.
How to read this, and where it comes from
QEWI = Qualified Exterior Wall Inspector — a licensed professional engineer or registered architect who meets DOB’s FISP qualifications and signs the report (the independent expert, not the managing agent).
Penalties shown are amounts DOB assessed against filings on record across 2005–10 to 2020–25. The FISP dataset does not record whether they were paid, contested or remain open, so treat the figure as history rather than a current balance and confirm the building’s standing with the managing agent.
Source: NYC DOB facade filings (FISP) · The Roebling Research Library. City data last refreshed October 2026.
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 |
|---|---|---|---|---|---|
| Aug 20, 2026 | 10D | 1 BR · 2 BA · 1,494 sf | $1,725,000 | $1,155/sf | -3.9% |
| Jul 23, 2026 | 8H | 1 BR · 2.5 BA · 1,230 sf | $1,800,000 | $1,463/sf | +1.4% |
| Jun 8, 2026 | 11F | 2 BR · 2.5 BA · 2,209 sf | $3,623,000 | $1,640/sf | -3.4% |
| May 12, 2026 | 9D | 1 BR · 2 BA · 1,494 sf | $1,825,000 | $1,222/sf | -1.4% |
| Apr 30, 2026 | 2H | 2 BR · 2.5 BA · 2,046 sf | $2,050,000 | $1,002/sf | -6.8% |
| Mar 31, 2026 | 4G | 1 BR · 2.5 BA · 2,556 sf | $2,300,000 | $900/sf | -3.6% |
| Mar 10, 2026 | 3B | 3 BR · 2.5 BA · 1,887 sf | $2,875,000 | $1,524/sf | -0.7% |
| Feb 25, 2026 | 7H | 1 BR · 2 BA · 1,320 sf | $1,590,000 | $1,205/sf | -11.4% |
Market read. Most recent trades (2026 to date) cleared a median $1,124/sf (floor-adjusted) across 8 sales. Floor-adjusted means each sale is restated to a constant mix of floors, so the figure can differ from the plain median of the sales listed above. Median listing discount 3.6% from the last ask — a recurring negotiation gap worth pricing into any offer or listing strategy.
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 3-00036-7501; 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.
Closed rents at The Sweeney Building, last 36 months
| Size | Leases | Median / month |
|---|---|---|
| 2 bedroom | 2 | $8,500 |
| 3 bedroom | 2 | $14,222 |
5 closed leases, October 2023 to September 2026. Most recent lease July 2026. Sizes with fewer than 2 leases are not shown. Compiled by The Roebling Team at Compass from closed leases.
What would your apartment rent for?
The figures above are the building's closed leases. Enter your apartment and I'll send you what yours would rent for, from comparable leases at The Sweeney Building and nearby.
At the recent median sale of $2.05M (15 sales in the past 24 months, since October 31, 2024), a buyer putting 25% down would pay about $87,377 to close, or 4.3% of the price.
- Mansion tax: $25,625
- Mortgage recording tax: $29,597
- Title insurance: $9,225
- Attorneys, lender, building fees, reserves and filings: $22,930
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
This is the park-side authentic loft. One short block to Brooklyn Bridge Park's Main Street entrance — the strongest everyday-location argument in the DUMBO conversion tier.
The bones are the value. A 1908 Moyer-built reinforced-concrete daylight factory with rusticated-concrete façade detail, inside the DUMBO Historic District; the window scale and ceiling volume are original and unreproducible.
Boutique scale cuts both ways. Eighty-five units means intimacy and scarcity value, but a thin comparable set and a smaller amenity budget than the large conversions; review financials with that scale in mind.
Condominium transfer applies. Right of first refusal rather than co-op board approval; confirm LLC and trust ownership rules and closing timing in the declaration, bylaws and house rules.
Confirm the paper. Amenity details, house rules, and any transfer-fee provisions should be verified against the offering plan and amendments — The Roebling Research Library maintains the file.
What to know if you’re selling
Sell the location first. Park adjacency plus historic-district context is the pairing that distinguishes the building within the conversion tier — lead with it.
Price on scarcity, carefully. Intermittent supply supports premium positioning, but thin comparables mean over-asks sit; anchor to the most recent same-tier conversion closings across the Clock Tower, 70 Washington, and 168 Plymouth as well as building history.
Corner exposures and bridge views photograph the building's argument. Marketing should be built around light and the specific view envelope.
Prepare diligence materials early. A 1908 structure in a historic district will draw LL11 and capital-plan questions; a clean package protects pricing.
Comparable buildings
If you're considering The Sweeney Building, also evaluate:
- The Clock Tower (1 Main Street) — the neighboring founding conversion; the icon across the intersection
- 70 Washington Street — the large-scale Gair conversion; deeper liquidity, same pedigree school
- 168 Plymouth Street — the newest boutique conversion; comparable scale, newer finishes
- Kirkman Lofts (37 Bridge Street) — boutique conversion on the quieter eastern seam of the neighborhood
- 205 Water Street — boutique contemporary condominium alternative in east DUMBO
- 133 Water Street — small modern condominium mid-neighborhood
- 98 Front Street — the new-development counterpoint at mid-scale
- One Brooklyn Bridge Park (360 Furman Street) — warehouse-scale conversion directly in the park, in neighboring Brooklyn Heights
More DUMBO buildings
- 200 Water Street — 1950 condominium
- 205 Water Street — 2010 condominium
- 206 Front Street (The Vista on Vinegar Hill) — 2006 condominium
- 31 Washington Street — 1894 condominium
- 37 Bridge Street (Kirkman Lofts) — 1915 condominium
- 39 Pearl Street — 1880 co-op
The neighborhood
For the full neighborhood — its buildings, character, and market — read The Roebling Team Guide to DUMBO.
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 Sweeney Building?
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