40 West 84th Street
40 West 84th Street, New York, NY 10024
Upper West Side
BBL 1011970052 · BIN 1031236
- Year built
- 1917
- Type
- Cooperative
- Landmark
- No
Every recorded sale at this building, 2004–2023
Bedroom-by-bedroom medians, the full transfer record, and how units trade against ask.
- Recent range
- $1.2M – $1.2M
- Listing discount
- 0.0%
- Recorded transfers
- 24
40 West 84th Street is a 1917 pre-war cooperative on one of the Upper West Side's best blocks — a tree-lined stretch between Central Park West and Columbus, a few hundred feet from the park itself. It is an intimate building by design: nine stories, 28 apartments, and an unusually low density of just three residences per floor, which gives each home cross light and a measure of privacy that larger West Side buildings cannot match. The building converted from rental to cooperative ownership in 1986, and runs today as a quiet, owner-occupied house.
What recommends it is the combination of pre-war substance and a genuinely livable, flexible profile. The apartments carry the high ceilings and wide paneled windows of the era; the building offers a private landscaped garden — a real rarity on a West Side side street — and the cooperative's policies are among the more accommodating in the neighborhood. For buyers who want a pre-war home steps from Central Park, without the scale or formality of a Central Park West tower, 40 West 84th is a strong, under-the-radar option.
Architecture and unit composition
The building is classic Upper West Side pre-war: a nine-story masonry facade with the even fenestration, solid proportions, and detail of a 1917 apartment house built to last. Its signature interior trait is the three-apartments-per-floor layout — a low-density plan that yields homes with multiple exposures, good light, and the high ceilings and wide paneled windows the era is known for.
The 28 cooperative residences range across the building's floors with the gracious room scale of pre-war construction. Because there are only three homes per landing, layouts feel generous rather than carved up, and renovated apartments here pair that pre-war framework with modern kitchens and baths. The building's relatively recent 1986 conversion means its cooperative systems and governance are well established, while the bones remain firmly of 1917.
Building operations
40 West 84th runs as an efficient, modern-minded small cooperative. A live-in superintendent maintains the building, and a keyless electronic fob entry system handles security — a practical, lower-overhead model than a full-time doorman, which helps keep carrying costs down. The amenity set is genuinely appealing for a building this size: a private landscaped garden with seating areas and a grill, a bicycle room, private storage, and a central laundry room. The garden in particular is an asset few West Side side-street buildings can offer.
On policy, the cooperative is notably flexible. Pets are permitted, pied-à-terre ownership is allowed, and the building permits subletting — a combination that is uncommon and that meaningfully widens the buyer pool. The standard purchase calls for a minimum 20% down payment (financing of up to 80%), and the building carries a flip tax payable at closing. As with any cooperative, the board reviews each purchase application with a full package and interview.
Local Law 97
- 2024–2029 annual penalty
- $0 (under cap)
- 2030–2034 annual penalty
- $0 (under cap)
- Per unit / month range
- —
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.
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.
See the full facade history →Recent sales
Recent transfers at this building, curated by The Roebling Team research desk. Apartment-level facts are independently verified before publishing; sale prices reflect the recorded transfer amount at the NYC Department of Finance.
| Date | Unit | Apartment | Price | PPSF | vs. Ask |
|---|---|---|---|---|---|
| Jun 1, 2022 | 7B | 2 BR · 1.5 BA · 1,225 sf | $1,700,000 | $1,388/sf | +6.3% |
| Nov 20, 2018 | PH | 1 BR · 1 BA | $1,230,000 | +0.0% | |
| Oct 25, 2016 | 7A | 2 BR | $1,300,000 | +2.0% | |
| Nov 16, 2015 | 8C | 2 BR · 1 BA · 950 sf | $1,120,000 | $1,179/sf | +14.9% |
| Aug 12, 2015 | 7B | 2 BR · 1.5 BA · 1,225 sf | $1,565,000 | $1,278/sf | +1.0% |
| Oct 4, 2012 | 6A | 2 BR | $960,000 | +1.2% | |
| Sep 14, 2012 | 4A | 2 BR | $929,052 | -0.1% | |
| Jul 12, 2011 | 9C | 2 BR | $800,000 | -5.9% |
Market read. $/sf is measured on the latest sales with reliable square footage (2022): a median $1,388/sf across 1 sale. The building has traded as recently as 2023. Median listing discount 0.0% from the last ask.
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 1-01197-0052) 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.
What to know if you’re buying
This building rewards buyers who value flexibility and light. The three-per-floor layout means good exposures; the policies — pets, pied-à-terre, and subletting all permitted — are among the most accommodating on the West Side, which matters if your plans aren't strictly full-time-owner-occupant. Financing is allowed to the standard 80% (20% down), and a flip tax applies at closing, so build that into your numbers. The private garden, bike room, and storage round out a practical amenity set, and the keyless entry keeps costs efficient in lieu of a doorman. Prepare a full board package; even an accommodating co-op reviews each buyer. Most upside here comes from interior renovation, since the pre-war envelope and the location near Central Park are the durable value.
What to know if you’re selling
Lead with flexibility and lifestyle. Few West Side co-ops can advertise pets, pied-à-terre ownership, and subletting all in one building, plus a private landscaped garden — that combination broadens the buyer pool well beyond the typical full-time-resident audience and is a genuine differentiator. Pair it with the pre-war fundamentals: three homes per floor, high ceilings, wide windows, and a tree-lined block a short walk from Central Park. Present the apartment's exposures and renovation level clearly, and price against the building's own history and the surrounding pre-war co-ops rather than the Central Park West towers. Plan the board package and interview into the timeline. For the buyer who wants pre-war character with room to use the apartment on their own terms, this building's policies do real marketing work.
Comparable buildings
If you're considering 40 West 84th Street, also evaluate these nearby Upper West Side co-ops:
- 15 West 84th Street — pre-war cooperative on the same block
- 215 West 84th Street — Upper West Side cooperative nearby
- 15 West 81st Street — pre-war cooperative near the park
- 18 West 87th Street — Upper West Side pre-war cooperative
- 200 West 88th Street — West Side cooperative a few blocks north
The neighborhood
For the full corridor — architecture, schools, transit, and pricing across Upper West Side — read The Roebling Team Guide to Upper West Side.
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.
Considering a move at 40 West 84th Street?
Request a private building brief with the relevant comparable sales, current and off-market availability, and an apartment-specific view of value.
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at 40 West 84th 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.