- Year built
- 1921
- Type
- Cooperative
- Landmark
- No
Every recorded sale at this building, 2004–2026
Bedroom-by-bedroom medians, the full transfer record, and how units trade against ask.
- 3BR median
- $3.9M
- Recent range
- $2M – $4.8M
- Listing discount
- 3.3%
- Recorded transfers
- 40
505 West End Avenue is a handsome early-1920s cooperative designed by Gaetano Ajello, the architect who, more than almost anyone, gave West End Avenue and Broadway their Italian Renaissance character in the 1910s and 1920s. Completed in 1921, the building is a confident palazzo with a two-story rusticated limestone base, decorative balconies, and quoined corners — the polished masonry vocabulary that defines the best of upper-Broadway-era West Side apartment houses.
The proposition is pre-war substance at West End value. The building delivers the large, well-zoned apartments buyers come to West End Avenue to find, in a full-service, pet-friendly cooperative on a prime block near both Riverside and Central Parks. The Ajello pedigree and the limestone-base architecture give it real curb presence; the room counts and light give it livability.
For buyers, it is space, character, and a serious West End address. For sellers, the Ajello design, the facade, the roof deck, and the location are the marketable distinctions that set a home here apart from newer and smaller inventory.
Architecture and unit composition
Ajello's design is among his characteristic strengths: a richly articulated Italian Renaissance facade anchored by a rusticated limestone base, with decorative balconies and quoins that lend the building a palazzo's gravity. It is one of the more architecturally distinguished buildings on its stretch of West End, and the masonry has aged with the dignity that defines the avenue.
Inside, the 68 residences are pre-war in plan and proportion — entry foyers, separate dining rooms in the larger lines, high ceilings, and hardwood floors, in layouts that run from comfortable smaller homes to spacious family apartments. The thick masonry construction makes for quiet, well-insulated interiors. As across the pre-war stock, the most sought-after homes are the larger, light-filled lines that have been thoughtfully updated while keeping their original character.
Building operations
505 West End is a full-service cooperative with a full-time doorman, a live-in superintendent, and a porter — the staffing a serious West End building requires. Amenities are practical and well-used: a common roof deck with open views, a central laundry room, a bike room, and storage. The building is pet-friendly, with dogs and cats both permitted — a real draw on the family-oriented Upper West Side.
The cooperative is established and conservatively governed, in the manner typical of a long-running pre-war co-op. Prospective purchasers should expect a standard board package and personal interview; sublet policy, financing limits, and any flip tax or transfer fee are set by the board and confirmed through the cooperative's documents during the application process.
Facade safety — Local Law 11
The facade passed its last inspection with no required repairs — nothing to budget for here, and no facade assessment on the horizon for roughly five years.
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 |
|---|---|---|---|---|---|
| Mar 27, 2026 | 2B | 4 BR · 3 BA | $2,200,000 | -3.3% | |
| Jul 10, 2024 | 6C | 3 BR · 1.5 BA | $2,300,000 | -6.1% | |
| Aug 3, 2023 | 10AB | 5 BR · 4 BA · 4,000 sf | $4,800,000 | $1,200/sf | -1.0% |
| Jun 22, 2023 | 4C | 2 BR · 2 BA | $2,030,000 | -1.5% | |
| Feb 10, 2022 | 14D | 2 BR · 2 BA | $1,900,000 | -2.6% | |
| Nov 18, 2021 | 5B | 3 BR · 2 BA | $2,050,000 | -4.7% | |
| Jul 28, 2021 | 11C | 4 BR · 3.5 BA · 3,050 sf | $4,499,500 | $1,475/sf | off-mkt |
| Feb 25, 2021 | 4A | 2 BR · 1.5 BA | $999,000 | -8.8% |
Market read. Most recent trades (2023) cleared a median $1,200/sf across 1 sale. Median listing discount 1.7% 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.
Other recent transfers
| Date | Unit | Price |
|---|---|---|
| Sep 20, 2024 | 10C | $3,937,835 |
| Jul 28, 2021 | 11D | $3,850,000 |
| Aug 23, 2017 | 12AA | $949,000 |
| Jun 1, 2015 | 3D | $1,680,000 |
| Dec 30, 2013 | 4A | $960,000 |
| Sep 12, 2013 | 6C | $1,340,000 |
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 1-01246-0029) 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 is a straightforward pre-war co-op purchase with a strong amenity set and a pet-friendly posture. Plan for a board package and interview, and use diligence to focus on the apartment — room count, light, condition of the kitchen and baths, and any prior renovation — alongside the cooperative's reserves, recent capital projects, and maintenance trend.
The location is a genuine selling point: a prime West End block with Riverside Park two avenues west and Central Park within reach to the east, the 86th and 79th Street subway stations nearby, and the everyday retail of Broadway a block away. Buyers who want pre-war space, architectural character, and a pet-friendly building at upper West Side value are the natural audience. We help buyers assess the home, the finances, and the right offer.
What to know if you’re selling
Lead with what 505 offers that surrounding inventory does not: a Gaetano Ajello-designed Italian Renaissance cooperative with a rusticated limestone base, large pre-war layouts, a roof deck, and a pet-friendly, full-service operation. Those are concrete, marketable differentiators.
Price to the building's own resale history and to comparable upper West End Avenue pre-war cooperatives, with condition and light as the decisive variables. A renovated, larger-line apartment should be positioned at the top of the building's range. We advise sellers on staging, timing, pricing, and buyer qualification so the home reaches the audience that values pre-war space, architecture, and a serious West End address.
Comparable buildings
If you're considering 505 West End Avenue, also evaluate these nearby West End Avenue cooperatives:
- 525 West End Avenue — pre-war cooperative a block north
- 535 West End Avenue — established West End cooperative nearby
- 480 West End Avenue — pre-war full-service cooperative
- 470 West End Avenue — West End Avenue cooperative
- 450 West End Avenue — pre-war cooperative on the corridor
The Roebling Team at 505 West End Avenue
The Roebling Team at Compass specializes in West End Avenue, Riverside Drive, Central Park West, and the pre-war cooperative market across the Upper West Side. We publish this profile because a building with the architecture, scale, and amenities of 505 West End rewards buyers and sellers who understand the value of pre-war space and character on a prime avenue.
If you're considering a transaction at 505 West End Avenue, a consultation is the right starting point.
Get the full picture on this building.
Current availability including off-market, the full comp set, and the board & financials read most listings don't show.