Chelsea Modern
447 West 18th Street, New York, NY 10011
Chelsea
BBL 1007167503 · BIN 1087721
- Year built
- 2009
- Type
- Condominium
- Landmark
- No
Every recorded sale at this building, 2008–2026
Price-per-square-foot over time, the line- and floor-premium curves, and every recorded sale.
- Median $/sf
- $1,560
- Listing discount
- 3.9%
- Recorded sales
- 103
- On record
- 2008–2026
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at Chelsea Modern 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.
447 West 18th Street is one of West Chelsea's signature design statements. Completed in 2009 to a design by architect Audrey Matlock, Chelsea Modern is instantly recognizable for its blue-tinted, horizontally angled glass façade — a faceted, wave-like front that nods to the Hudson River a few blocks west. It arrived as the gallery district was transforming into one of Manhattan's most architecturally ambitious neighborhoods, and it remains a building people stop to look at.
The location is the heart of contemporary Chelsea: steps from the High Line, close to the Hudson River waterfront, the Chelsea Piers complex, and the dense concentration of art galleries that define the district. Within that setting, Chelsea Modern offers a boutique condominium of 47 homes with full-service staffing and a genuine amenity package.
For buyers, the proposition is design-forward and location-rich: an architecturally distinctive condominium beside the High Line, with the financing flexibility and ownership latitude a condominium provides, in a corridor where new for-sale supply is tightly held.
Building operations
As a condominium, Chelsea Modern offers the ownership flexibility downtown buyers want. Financing is flexible — there are no co-op-style financing caps. There is no board admissions process — purchases clear through a right-of-first-refusal rather than a board package and interview. Pied-à-terre, trust, LLC, and investment purchases are customary, and resale and subletting are materially freer than in a cooperative. Pets are permitted, and washer/dryers are standard in the homes. Service and amenities are full-featured for a boutique building: a full-time doorman and concierge, a landscaped roof deck, a private outdoor garden and courtyard, a high-end fitness center with a steam room and showers, a bike room, and cold storage.
Architecture and residences
The façade is the building's identity — a blue-tinted glass curtain wall broken into horizontal facets that catch the light and read as a series of waves, a deliberate response to the river. The form is complex and angled rather than flat, which gives many homes private terraces and balconies carved into the geometry.
The 47 residences range from one- to five-bedroom layouts. Interiors feature satin-finish maple floors, in-residence washer/dryers, and the floor-to-ceiling glass the façade implies; many homes include private outdoor space. Value within the building is set by floor, exposure, outdoor space, and the larger upper-floor and penthouse homes, which command the strongest pricing and the best light. The design pedigree and the High Line adjacency are durable differentiators.
Local Law 97
- 2024–2029 annual penalty
- $0 (under cap)
- 2030–2034 annual penalty
- $16,740/yr
- Per unit / month range
- $0 – $30
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).
Penalties shown are amounts DOB assessed against filings on record across 2015–20 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 record last verified September 2026.
Management & transfer contacts
- Flip tax
- 2% of gross sale price (seller)
- Sublet policy
- Allowed; short-term rentals/AirBnB not allowed
- Pied-à-terre
- Allowed (secondary residence, corporate & diplomat purchase allowed)
- Notable fees
- Condo. Buyer working capital contribution = 2 months common charges; app $725; credit $150/applicant; closing doc prep $400; move-in/out $1,000 deposit; lease renewal fee = 1 month common charges
Recent sales
Recent closings at this building, curated by The Roebling Team research desk. 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 |
|---|---|---|---|---|---|
| Jun 10, 2026 | 7A | 2 BR · 2 BA · 1,441 sf | $2,325,000 | $1,613/sf | -1.9% |
| Jan 30, 2026 | GAL2 | 3 BR · 2.5 BA · 2,277 sf | $1,998,750 | $878/sf | -20.1% |
| Jan 30, 2026 | GD2 | 3 BR · 2.5 BA · 2,277 sf | $1,998,750 | $878/sf | off-mkt |
| Mar 21, 2025 | PH12B | 3 BR · 2.5 BA · 1,937 sf | $3,860,000 | $1,993/sf | -0.9% |
| Feb 11, 2025 | 5AE | 4 BR · 4 BA · 2,843 sf | $3,900,000 | $1,372/sf | -8.2% |
| Jul 10, 2024 | 7C | 2 BR · 2 BA · 1,400 sf | $2,380,000 | $1,700/sf | -10.2% |
| Aug 9, 2023 | 10B | 3 BR · 3 BA · 1,919 sf | $2,999,999 | $1,563/sf | -17.8% |
| Apr 28, 2023 | 6A | 2 BR · 2 BA · 1,431 sf | $2,350,000 | $1,642/sf | -4.1% |
Market read. Most recent trades (2026) cleared a median $1,560/sf across 1 sale. Median listing discount 3.9% 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 1-00716-7503) 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; square footage from recorded condo declarations and offering plans.
What to know if you’re buying
The advantages of a condominium apply in full: flexible financing, no board interview, and the customary acceptance of pied-à-terre, trust, and LLC purchases. The building's distinguishing features — Matlock's faceted façade, the High Line adjacency, in-unit washer/dryers, and private outdoor space — are real value drivers and worth weighing against floor and exposure. Diligence centers on the offering plan, the common-charge and tax structure, the reserve, and the specifics of the home, including the condition of the glass-and-terrace envelope. We help buyers underwrite the apartment, weigh the comparison set, and structure the purchase.
What to know if you’re selling
The story is design and location: an Audrey Matlock building with a wave-faceted blue-glass façade, steps from the High Line, with private terraces and a real amenity package. The marketing core is the architecture and the West Chelsea address, and the comparison set is the design-forward condominiums of the High Line corridor. Presenting a home's outdoor space, light, and finishes accurately — and positioning a terraced or upper-floor unit on its distinctiveness — is what produces the strongest result. Condominium closing mechanics keep the path predictable for the flexibility-minded buyer this building attracts.
Comparable buildings
If you're considering Chelsea Modern, also evaluate these West Chelsea condominiums:
- 515 West 18th Street — a West Chelsea condominium near the High Line
- One High Line (500 West 18th) — a High Line–anchored development
- 212 West 18th Street — Walker Tower, a landmark Chelsea conversion
- 224 West 18th Street — a Chelsea condominium
The neighborhood
For the full corridor — architecture, schools, 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.
Considering a move at Chelsea Modern?
Request a private building brief with the relevant comparable sales, current and off-market availability, and an apartment-specific view of value.