- Year built
- 1920
- Type
- Cooperative
- Units
- 16
- Floors
- 6
- Landmark status
- Not an individual landmark; not in a historic district
- NYC Landmarks Preservation Commission and City Planning records, updated February 2026
Every recorded sale at this building, 2004–2026
Bedroom-by-bedroom medians, the full transfer record, and how units trade against ask.
- Recent range
- $560K – $3.4M
- Listing discount
- 4.1%
- Recorded transfers
- 20
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at 400 West 23rd Street 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.
400 West 23rd Street contains a wide range of apartment sizes inside a small Chelsea cooperative. Compact homes share the building with larger combined duplexes. At the top, pitched ceilings and skylights distinguish the upper apartments from the more conventional floors below.
The building occupies the Ninth Avenue corner, with approximately 55 feet of frontage and a depth close to 99 feet. Its six-story form provides room for broad interiors as well as smaller subdivisions. Apartment combinations have changed the interior divisions over time.
City records date the building to 1920 and record an alteration in 1988. Its elevator and live-in superintendent provide services within a considerably smaller association than the large apartment houses found elsewhere along West 23rd Street. The exterior is not designated as a landmark.
Architecture and unit composition
Single-level homes include compact one-bedroom plans with open living areas. High ceilings and exposed brick occur in these smaller layouts as well as in the larger apartments. The corner position allows street-facing rooms to take different exposures, while other rooms face toward the interior of the block.
Combined duplexes extend across more than one original apartment and use internal stairs to connect their rooms. Private outdoor space belongs to particular layouts, including a garden or terrace attached to a larger duplex.
The upper-floor apartments include angled ceilings, skylights and loft areas over the main living rooms. Their usable space depends on the slope of the roof and the relationship between the upper platform and the rooms below. A loft area within an apartment adds an internal level beyond the elevator landing.
The larger combinations and the compact homes cannot be compared by bedroom count alone. Differences in ceiling volume, internal circulation and outdoor access account for substantial variation in how much of each floor plan is devoted to living space.
Building operations
Shared laundry, bicycle storage and storage cages occupy common areas, while some homes have their own laundry installations. The live-in superintendent supports the building's day-to-day operation, and virtual entry service supplements the elevator-served entrance.
The cooperative holds the property in Tax Class 2. Apartment buyers acquire shares and a proprietary lease, with building taxes included in the cooperative's expenses. Private gardens and terraces are associated with specific residences; they are not a common outdoor amenity for the entire association.
Monthly carrying charges in recent sales
- Maintenance, per room
- $661 per room a monthMedian of 3 recorded sales since October 2023Source: recorded sales, refreshed October 2026
Maintenance as recorded with each sale. A co-op's maintenance already covers the building's real estate taxes and the building's own mortgage, if it has one; add your own loan payment for the monthly outlay. A summary of recorded sales, not a current bill; charges change.
Building staffing and amenities
- Live-in superintendent
- YesSource: The Roebling Team's building profile
- Elevator
- YesSource: NYC Department of City Planning records (PLUTO)
- Amenities noted
- Garden, bike storage, storage, laundry roomSource: 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
This building is below the 25,000 sq ft threshold at which LL97 limits apply to a building on its own. It is still covered if it shares a tax lot or condominium board with buildings totaling over 50,000 sq ft; confirm on DOB’s covered-buildings list.
See full Local Law 97 analysis →Recent sales
Recent transfers 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 |
|---|---|---|---|---|---|
| Mar 25, 2026 | 6JK | 4 BR · 2 BA | $1,865,000 | -11.2% | |
| Jan 9, 2026 | 3LK | 3 BR · 3 BA | $3,350,000 | -4.1% | |
| Jul 19, 2024 | 3J | 1 BA · 540 sf | $560,037 | $1,037/sf | +1.8% |
| Dec 14, 2022 | 3M | 1 BR · 1 BA | $740,000 | -10.2% | |
| Jan 19, 2022 | 4L | 1 BR · 1 BA · 750 sf | $910,000 | $1,213/sf | -1.0% |
| Apr 28, 2017 | 4L | 1 BR | $875,000 | -10.3% | |
| Jan 19, 2017 | 2J | 530 sf | $639,000 | $1,206/sf | +0.0% |
| Oct 16, 2014 | 4M | 1 BR · 1 BA | $826,000 | +0.1% |
Market read. $/sf is measured on the latest sales with reliable square footage (2024): a median $1,037/sf (recorded) across 1 sale. The building has traded as recently as 2026. Median listing discount 0.7% 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 1-00720-0047). 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 on co-ops is not officially recorded, figures shown are approximate.
What would your apartment rent for?
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Buying here? Co-op closing costs typically run 2 to 3% 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
Match a combined home to its legal apartment configuration. Some of the building's largest residences incorporate multiple original apartments across different floors. The proprietary lease, share allocation and alteration approvals should all cover the combined footprint being sold, including any internal stair and attached outdoor area.
Comparable buildings
- 333 West 22nd Street — A similarly small cooperative with an elevator and basement facilities, adapted from older row houses.
- 240 West 23rd Street (The Arcadia) — A loft cooperative on the same street, with a former commercial structure and a comparable association scale.
- 429 West 22nd Street (Anderson House) — A smaller walk-up cooperative in paired historic houses, including a garden duplex.
- 433 West 24th Street — A nearby prewar cooperative that operates within a larger three-building association.
- 458 West 20th Street — An older low-rise elevator cooperative with superintendent service and a similarly small residential count.
More Chelsea buildings
- 360 West 28th Street — 2002 condominium
- 365 West 20th Street (Chelsea Court Tower) — 1928 co-op
- 366 West 15th Street — 1905 condominium by SHoP Architects
- 403 West 21st Street — 1889 co-op
- London Terrace Towers, 405 West 23rd Street — 1929 condop
- 406 Eighth Avenue — 1986 condominium
The neighborhood
For the full corridor — architecture, transit, and pricing across Chelsea — read The Roebling Team Guide to Chelsea.
The full playbook — what goes in the package, how boards read your financials, the interview, and the timeline — plus sample cover, reference, and personal letters you can adapt.
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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646.939.7375 · c.cohen@compass.com