- Year built
- 2009
- Type
- Condominium
- Landmark status
- Not an individual landmark; not in a historic district
- NYC Landmarks Preservation Commission and City Planning records, updated February 2026
- Leasing by owners
- Permitted
- Pied-à-terre
- Permitted
- Pets
- Pets permitted; species and limits not stated
- Washer/dryer
- Permitted
- Flip tax
- 2% of the purchase price, paid by the seller
- Doorman
- Full-time doorman
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, 2026 to date
- $1,562
- floor-adjusted, 1 sale
- Listing discount
- 3.9%
- Recorded sales
- 100
- 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 has no co-op board admission: purchases run through the condominium's application and right-of-first-refusal process rather than a co-op board package and interview. Pied-à-terre use and leasing by owners are permitted; confirm financing and trust or LLC ownership rules in the current declaration, bylaws and house rules. 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.
Application and transaction fees
Fees below are from building management's published schedule, as of September 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
- Equal to 2% of the gross sale price
- Rate
- 2% of the purchase price
- Paid by
- Seller
Source: building management's published schedule, as of September 2026
Purchase
6 items
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Application Processing FeePaid to management | Paid by Buyer | When With the application | Amount $725 | Refundable Non-refundable |
| Closing Document Preparation FeePaid to management | Paid by Buyer | When With the application | Amount $400 | Refundable Non-refundable |
| Credit Check FeePer applicantPaid to management | Paid by Buyer | When With the application | Amount $150 Per Applicant | Refundable Non-refundable |
| Working Capital ContributionPaid to the building | Paid by Buyer | When With the application | Amount Equal to the amount of Two (2) months Common charges | Refundable Not stated |
Deposits
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Move In DepositPaid to the building | Paid by Buyer | When With the application | Amount $1,000 | Refundable Refundable |
| Move Out DepositPaid to the building | Paid by Seller | When With the application | Amount $1,000 | Refundable Refundable |
Rental or lease
7 items
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Common ChargesPaid to the building | Paid by Landlord | When With the application | Amount Equal to the amount of Two (2) months common charges | Refundable Non-refundable |
| Application Processing FeePaid to management | Paid by Tenant | When With the application | Amount $575 | Refundable Non-refundable |
| Credit Check FeePer applicantPaid to management | Paid by Tenant | When With the application | Amount $150 Per Applicant | Refundable Non-refundable |
Deposits
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Move Out DepositPaid to the building | Paid by Landlord | When With the application | Amount $1,000 | Refundable Refundable |
| Move In DepositPaid to the building | Paid by Tenant | When With the application | Amount $1,000 | Refundable Refundable |
Lease renewal
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Lease Renewal FeePaid to the building | Paid by Landlord | When With the application | Amount Equal to one (1) month's common charges | Refundable Non-refundable |
| Lease Renewal Processing FeePaid to management | Paid by Tenant | When With the application | Amount $225 | Refundable Non-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.
Financing and purchase requirements
- Guarantors
- Permitted with conditionsMust provide full financial package and we will have to run a credit reportSource: building management's published schedule, as of September 2026
- Co-purchasing
- PermittedSource: building management's published schedule, as of September 2026
- Parent buying for an employed child
- PermittedSource: building management's published schedule, as of September 2026
- Parent buying for a student child
- PermittedSource: building management's published schedule, as of September 2026
- Purchase or lease by a corporation
- PermittedSource: building management's published schedule, as of September 2026
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
- PermittedSource: building management's published schedule, as of September 2026
- Pied-à-terre ownership
- PermittedSource: building management's published schedule, as of September 2026
- Short-term rentals
- Not permittedSource: building management's published schedule, as of September 2026
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; species and limits not statedSource: building management's published schedule, as of September 2026
- In-unit washer/dryer
- PermittedSource: The Roebling Team's building profile
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
- $1,014 per room a monthMedian of 5 recorded sales since October 2023Source: recorded sales, refreshed October 2026
- Common charges + taxes, per square foot
- $2.92 per square foot a monthMedian of 6 recorded sales since October 2023Source: recorded sales, refreshed October 2026
- Common charges alone, per square foot
- $1.13 per square foot a monthMedian of 10 listings since October 2023 that give the annual taxSource: listing records, refreshed October 2026
- Real estate taxes alone, per square foot
- $1.98 per square foot a monthMedian of 10 listings since October 2023 that give the annual taxSource: listing records, 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. The split into common charges and taxes comes from the listings that also give the annual tax, a different sample, so the two lines need not add up exactly to the combined median; a tax abatement can hold taxes below the full amount until it expires. A summary of recorded sales and listings, not a current bill; charges change.
Building staffing and amenities
- Doorman
- Full-time doormanSource: The Roebling Team's building profile
- Concierge
- YesSource: recent listing records
- Elevator
- YesSource: NYC Department of City Planning records (PLUTO)
- Amenities noted
- Fitness room, spa, roof deck, garden, bike storage, cold storageSource: 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
- $30,468/yr
- Per unit / month range
- $0 – $55
- Modeled exposure split equally across 46 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 FISP filing classified the facade as Safe — no repairs were required at that inspection. A filed Safe grade is not a guarantee of current condition: owners still maintain the facade and, where required, observe parapets each year. Future inspection timing (Local Law 49 of 2025 changed the cycle framework from October 1, 2026), repair and any assessment decisions remain building-specific.
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 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 data last refreshed October 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)
- Policies and 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, 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 |
|---|---|---|---|---|---|
| Jun 10, 2026 | 7A | 2 BR · 2 BA · 1,441 sf | $2,325,000 | $1,613/sf | -1.9% |
| Jan 30, 2026 | GD2 | 3 BR · 2.5 BA · 2,277 sf | $1,998,750 | $878/sf | — |
| Jan 30, 2026 | GAL2 | 3 BR · 2.5 BA · 2,277 sf | $1,998,750 | $878/sf | -20.1% |
| 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 to date) cleared a median $1,562/sf (floor-adjusted) across 1 sale. 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 3.9% 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; 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 Chelsea Modern, last 36 months
| Size | Leases | Median / month |
|---|---|---|
| 1 bedroom | 4 | $7,875 |
| 2 bedroom | 5 | $10,250 |
9 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 Chelsea Modern and nearby.
At the recent median sale of $2.33M (5 sales in the past 24 months, since October 31, 2024), a buyer putting 25% down would pay about $97,012 to close, or 4.2% of the price.
- Mansion tax: $29,063
- Mortgage recording tax: $33,567
- Title insurance: $10,463
- Attorneys, lender, building fees, reserves and filings: $23,920
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
As a condominium there is no co-op board interview, and pied-à-terre use is permitted; confirm financing and trust or LLC ownership rules in the current declaration and bylaws. 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
More Chelsea buildings
- 444 West 19th Street — condominium
- 445 West 19th Street (Chatham in Chelsea) — condominium
- 445 West 20th Street — 1836 condominium
- 450 West 17th Street (The Caledonia) — 2008 condominium by Handel Architects
- 450 West 23rd Street — 1856 co-op
- 452 West 19th Street — 1920 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.
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.
646.939.7375 · c.cohen@compass.com