670 West End Avenue

The roughly 95 apartments span 16 stories. As a Blum building, the exterior rewards a close look — the firm's hallmark was ornament that reads as distinctly its own rather than off-the-shelf classical detailing — and the interiors deliver the pre-war essentials: high ceilings, hardwood floors, gracious entry foyers in the larger homes, and the solid masonry construction of the period. Layouts run from one- and two-bedroom homes through larger classic family apartments.

Higher floors and corner exposures carry the building's light premium, with some upper homes capturing open western light over the low-rise frontage toward Riverside Park and the river. Condition varies apartment by apartment with individual renovation history, as in any building of this age.

670 West End Avenue runs as a full-service pre-war cooperative. The staffing model centers on a 24-hour doorman and a live-in resident superintendent, with a recently renovated playroom, a bicycle room, central laundry, and private storage that conveys with each apartment. The standout shared amenity is the landscaped roof deck with its herb garden — a planted, furnished common space with open sky and neighborhood outlook that few pre-war buildings on the avenue can match.

As an established, 100%-owned cooperative, the building operates a standard board-approval process for purchases. Because it sits within the Riverside–West End Historic District Extension, exterior and facade-affecting renovation work goes through landmarks review in addition to board approval.

With roughly 95 apartments, 670 West End Avenue turns over at a steady, moderate pace — typically several closings a year, weighted toward the two- and three-bedroom family homes that define the building. Pricing tracks the upper-West-End pre-war co-op market: one- and two-bedrooms at the accessible end, larger and higher-floor family apartments at the premium. Floor altitude, light, exposure, and renovation condition are the principal in-building value drivers, and the roof deck, playroom, and transferable storage support demand from the family buyers the building attracts. For an apartment-level read, benchmark recent in-building closings against the comparable upper-West-End pre-war co-ops.

This is a board-approved cooperative purchase — expect a full board package, financial review, and interview. The building's appeal is specific: a Blum-designed pre-war with a restored lobby, a renovated playroom, transferable storage, and a landscaped roof deck, on a prime corner steps from Riverside Park. Run the financing math early, since co-op boards set financing limits and post-closing liquidity expectations. If you plan facade-affecting renovation, factor in the landmarks review that applies on top of board approval. We help buyers read the building's financials, benchmark the asking price, and prepare a board package that clears cleanly.

The selling story is architecture plus family amenity. Lead with the Blum pedigree and restored lobby, then with the things families actually use — the renovated playroom, the bike room, the storage that transfers with the home, and the landscaped roof deck — and with the Riverside Park and West 93rd Street position. Price to the building's own recent closings and the comparable upper-West-End pre-war co-ops; the larger high-floor homes carry their own premium and reward careful positioning. Closing timelines are co-op standard, roughly six to ten weeks from contract through a normal board process.

If you're considering 670 West End Avenue, also evaluate these West End Avenue pre-war co-ops:

• 645 West End Avenue — West End Avenue pre-war co-op nearby
• 680 West End Avenue — corner neighbor one block north
• 685 West End Avenue — upper West End pre-war peer

The Roebling Team at Compass specializes in Central Park West, the Upper West Side, and the broader Park-facing Manhattan market. We publish this profile because West End Avenue buyers and sellers deserve building-specific intelligence — architecture, the real amenity roster, transactional mechanics, and pricing at the apartment level — not generic market commentary.

If you're considering a purchase or sale at 670 West End Avenue, a 30-minute consultation is the right starting point.