- Type
- Cooperative
- Landmark
- Designated
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at 436 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.
About the building
436 West 23rd Street was built in 1854 for Edouard Bossange as an Italianate rowhouse. Its façade combines rusticated brownstone with brick, and the house now forms part of the Chelsea Historic District Extension. The five-residence cooperative occupies a five-story building on West 23rd Street between Ninth and Tenth Avenues. Access is by stairs, with an intercom at the entrance.
The apartment inventory includes a lower duplex with private rear garden space and upper homes with balconies or terraces. Fireplaces and wood floors remain among the interior features. The lower home's garden is arranged on two levels, extending its outdoor space behind the house. In-home laundry is present in the building, and additional storage is available. The residential plans include both two- and three-bedroom configurations.
Recent sales
Recent transfers 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 |
|---|---|---|---|---|---|
| Jul 10, 2025 | D | 3 BR · 2.5 BA | $2,379,500 | -4.6% | |
| Oct 31, 2019 | A | 2 BR · 2 BA · 1,250 sf | $2,650,000 | $2,120/sf | -5.4% |
| Oct 29, 2004 | B | 2 BR | $1,375,000 | -3.2% | |
| Apr 12, 2004 | A | 2 BR · 1,280 sf | $1,199,000 | $937/sf | +0.0% |
Market read. $/sf is measured on the latest sales with reliable square footage (2019): a median $2,120/sf across 1 sale. The building has traded as recently as 2025. 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.
Sales sourced from NYC Department of Finance recorded transfers (BBL 1-00720-0065) 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 on co-ops is not officially recorded, figures shown are approximate.
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.
Keep up with 436 West 23rd Street and its market
The Roebling Report, monthly: Manhattan sales data and analysis, including buildings like436 West 23rd Street. Unsubscribe anytime.
We’ll use your email for The Roebling Report and note your interest in this building. See our privacy policy.
What to know if you’re buying
A five-story walk-up. The route from the street to an upper apartment is a meaningful part of daily use here, including deliveries and moves. Owners also share responsibility for a nineteenth-century brownstone façade within a designated district; approved exterior repairs must be funded by only five residences.
Comparable buildings
- 450 West 23rd Street — another small rowhouse cooperative on the same street.
- 419 West 22nd Street — a similarly limited cooperative association in a historic Chelsea house.
- 461 West 22nd Street — cooperative ownership in another low-rise prewar building nearby.
More Chelsea buildings
- 434 West 20th Street — 1856 co-op
- 434 West 23rd Street — 1854 co-op
- 435 West 19th Street — 1924 condominium
- 442 West 23rd Street — 1855 co-op
- 443 West 24th Street — co-op
- 444 West 19th Street — 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.
Considering a move at 436 West 23rd Street?
Request a private building brief with the relevant comparable sales, current and off-market availability, and an apartment-specific view of value.