- Year built
- 1910
- Type
- Condominium
- Units
- 18
- Floors
- 9
Every recorded sale at this building, 2003–2025
Price-per-square-foot over time, the line- and floor-premium curves, and every recorded sale.
- Median $/sf (floor-adjusted)
- $1,352
- Listing discount
- 1.4%
- Recorded sales
- 66
- On record
- 2003–2025
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at The Chainworks 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 Chainworks Building is a boutique 18-unit loft condominium in the heart of Chelsea, converted in 2002 from a 1910 red-brick industrial building. The name traces directly to its original tenant, Eastern Chain Works, and the conversion deliberately preserved the manufacturing-era character — the distinctive vintage red-brick facade, generous loft proportions, and industrial bones remain intact.
The building sits mid-block on West 18th Street between Sixth and Seventh Avenues, a central Chelsea position within walking distance of Eataly, Union Square, the Flatiron District, and Chelsea Market. It trades as an authentic loft address rather than a glass-tower new-development.
Architecture and building operations
The Chainworks Building is a nine-story prewar loft structure of red-brick masonry, built in 1910 and converted to an 18-unit condominium in 2002. Units are full loft residences with high ceilings — roughly nine-and-a-half to eleven-and-a-half feet — beech-strip flooring, granite kitchens with Sub-Zero and Miele appliances, and oversized soaking tubs. The industrial facade and loft volumes are the building's defining architectural credentials.
Operations: part-time doorman on a seven-day schedule; keyed elevator access; video intercom. Amenities include two common roof decks (one with outdoor dining and a gas grill, one a furnished sundeck with Empire State Building and skyline views), a seventh-floor residents' terrace, a central laundry room, per-unit basement storage, and a bike and pram room.
Policy framework
- Type: Condominium
- Pets: Permitted
- Pied-à-terre: Permitted
- Subletting: Permitted
- Financing: Standard condominium LTV
- LLC/trust/foreign buyers: All permitted
- Right of first refusal: Procedural only
Local Law 97
- 2024–2029 annual penalty
- $0 (under cap)
- 2030–2034 annual penalty
- $1,311/yr
- Per unit / month range
- $0 – $6
- Modeled exposure split equally across 18 units (the city tax-lot count). Not an assessed amount; co-op shareholders are typically charged by share allocation.
Source: NYC LL84 benchmarking and PLUTO · The Roebling Research Library. City record last verified September 2026.
See full Local Law 97 analysis — emissions history, scenarios, methodology →Facade safety — Local Law 11
The latest available FISP filing classified the facade as Safe — no repairs were required at that inspection. Facade inspections run on a fixed five-year cycle; future inspection, repair, and any assessment decisions remain building-specific.
How to read this, and where it comes from
QEWI = Qualified Exterior Wall Inspector — the licensed engineer the city requires to sign the report (the independent expert, not the managing agent).
Source: NYC DOB facade filings (FISP) · The Roebling Research Library. City record last verified September 2026.
Management & transfer contacts
- Notable fees
- Min Down Payment: 10%
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 |
|---|---|---|---|---|---|
| Feb 5, 2025 | 3E | 3 BR · 2.5 BA · 2,693 sf | $3,495,000 | $1,298/sf | +0.0% |
| Jan 31, 2025 | 300E | 3 BR · 2.5 BA · 2,693 sf | $3,450,000 | $1,281/sf | -1.3% |
| May 26, 2023 | 700E | 3 BR · 2.5 BA · 1,705 sf | $3,500,000 | $2,053/sf | -11.4% |
| May 26, 2022 | 300N | 1,279 sf | $2,250,000 | $1,759/sf | off-mkt |
| Sep 1, 2021 | 200E | 3,097 sf | $4,575,000 | $1,477/sf | off-mkt |
| Sep 1, 2021 | 2E | 4 BR · 3.5 BA · 3,362 sf | $4,575,000 | $1,361/sf | -8.4% |
| May 27, 2021 | 2W | 4 BR · 3.5 BA · 3,359 sf | $4,450,000 | $1,325/sf | -15.2% |
| May 18, 2021 | 4W | 3 BR · 2.5 BA · 2,688 sf | $3,585,000 | $1,334/sf | -9.2% |
Market read. Most recent trades (2025) cleared a median $1,352/sf (floor-adjusted) across 2 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 1.4% 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 1-00793-7506). 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.
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.
Keep up with The Chainworks Building and its market
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Comparable buildings
- 252 Seventh Avenue (The Chelsea Mercantile) — Rockrose 2000 conversion; nearby Chelsea loft-conversion condo peer
- 212 West 18th Street (Walker Tower) — Walker / JDS 2014; nearby Chelsea trophy peer
- 245 Tenth Avenue — Della Valle Bernheimer 2010; nearby Chelsea peer
- 100 Eleventh Avenue — Nouvel 2010; nearby Chelsea starchitect peer
- 520 West 28th Street — Hadid 2017; nearby Chelsea starchitect peer
Sources: The Roebling Research Library (offering plans, house rules, financial statements, board minutes, internal transaction records); NYC Department of Finance recorded transfers; publicly recorded NYC building data.
More Chelsea buildings
- 142 West 19th Street (142Flatiron) — 2021 condominium
- 142 West 26th Street — 1911 co-op
- 143 West 20th Street
- 144 West 27th Street (144 West 27th Street) — 1911 condominium
- 146 West 22nd Street (The Paradigm) — 2003 condominium
- 146 West 26th Street (The Mihl Building) — 1922 condominium
The neighborhood
For the full corridor — architecture, transit, and pricing across Chelsea — read The Roebling Team Guide to Chelsea.
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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