310 West 85th Street

Ajello's design gives the building a handsome brick-and-stone street presence in the Romanesque Revival mode, with the masonry detailing and dignified scale typical of the West End/Riverside blocks. The plan is built around four apartments per floor — with one apartment reserved for the live-in superintendent — yielding a small, low-density community.

There are two principal layouts: a four-room, one-and-a-half-bath home, and a larger five-room residence convertible to three bedrooms with three baths. Most apartments retain their period charm — the proportions, light, and detail of 1920s construction — while having been updated to accommodate modern living. The result is a building of real pre-war character that lives comfortably today.

The Mimosa runs as a well-kept, owner-occupied cooperative. A live-in superintendent and a live-in resident manager are on staff, and the building carries the practical amenities residents rely on: a refurbished elevator, a bike room, a laundry room, and full-sized storage bins that transfer with the apartments — a genuine convenience that many comparable buildings can't offer. There is no doorman; this is a self-service entry building, which is reflected in its sensible, lower carrying costs.

On board policy, pets are welcome — a meaningful draw on the dog-friendly Upper West Side. Purchases clear through the customary cooperative board application and interview, and buyers should plan for the documentation and reserves a pre-war co-op expects.

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.

Market read. $/sf is measured on the latest sales with reliable square footage (2024): a median $1,227/sf across 1 sale. The building has traded as recently as 2026. Median listing discount 0.0% from the last ask.

Sales sourced from NYC Department of Finance recorded transfers (BBL 1-01246-0039) 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.

The appeal here is location and value. You are buying a genuine pre-war apartment on a prime West End–to–Riverside block, steps from Riverside Park, in a pet-friendly co-op with reasonable carrying costs. The absence of a doorman keeps maintenance lower than at full-service buildings nearby — a real plus for budget-conscious buyers who don't need attended-lobby service. Be ready for a standard co-op board process, and act promptly when a layout you want appears, since the building doesn't turn over often.

Sellers should lead with the block, the park proximity, the preserved pre-war detail, and the building's practical strengths — pet-friendliness, transferable storage, and sensible maintenance. Those features widen the buyer pool and distinguish a Mimosa apartment from generic West Side inventory. Price against recent trades in comparable West End/Riverside pre-war co-ops, adjusted for floor, light, and renovation level, and present the period character at its best, since that is what this building's buyers are looking for.

If you're weighing The Mimosa, also consider these nearby Upper West Side pre-war cooperatives:

• 302 West 86th Street — pre-war co-op a block north
• 305 West 86th Street — full-service West End building nearby
• 316 West 84th Street — pre-war co-op one block south
• 324 West 83rd Street — pre-war West Side cooperative
• 320 West 86th Street — large West End Avenue co-op