- Year built
- 1962
- Type
- Cooperative
- Units
- 22
- Floors
- 5
- Landmark
- No
- Pets
- Cats permitted; dogs generally not permitted — confirm at offer stage
- Subletting
- Limited; permitted on a restricted basis subject to board policy — confirm at offer stage
238 East 84th Street — Cornasesk House — is a small, self-managed cooperative in the heart of Yorkville, on East 84th Street between Second and Third Avenues. It is a boutique building of modest, efficient homes, run lean by the shareholders themselves, with a maintenance structure that folds in heat, hot water, and unlimited laundry. For the buyer who wants an entry point into the Upper East Side at a genuinely accessible price — a first apartment, a pied-à-terre, or a low-carry city foothold — the building is a clean, sensible proposition.
The appeal is straightforward: a well-run studio-scale co-op in a prime Yorkville location, close to the Q train at 86th Street and the 4/5/6 at 86th and Lexington, with the retail, restaurants, and everyday convenience of the neighborhood at the door.
Building operations
The cooperative is run self-managed and characteristically lean: an elevator, a shared laundry room with unlimited use included in maintenance, and heat and hot water included. There is no doorman — appropriate and cost-efficient for a boutique studio co-op of this scale, and a meaningful factor in keeping maintenance contained.
As a cooperative, ownership is by shares rather than deed: purchases require board approval and a board interview, financing is capped at a board-set percentage, and pied-à-terre and co-purchase arrangements are evaluated case by case. Cats are permitted; dogs generally are not. Subletting is limited and restricted by board policy. The exact financing maximum, any flip tax, and current sublet and pet rules vary by board policy and should be confirmed at offer stage.
What to know if you’re buying
This is a cooperative, so the path is a board package and interview, a financing cap set by the board, and underwriting of the building's financials and house rules. Note the operational realities up front: this is a self-managed building with laundry, heat, and hot water included, but no doorman, which suits buyers who value low carry over full-service amenities. Cats are permitted; dogs generally are not, and subletting is limited — confirm both at offer stage. Review the co-op's financials, reserve, and any planned capital work given the building's age.
The reasons to buy are the value and the location: an accessible Yorkville entry point with heat, hot water, and unlimited laundry folded into maintenance, in a well-run self-managed building on a convenient Upper East Side block.
What to know if you’re selling
The story is accessibility and location. A well-run, self-managed Yorkville co-op with low carrying costs and a prime block address sells to first-time buyers, pied-à-terre purchasers, and value-minded Upper East Side buyers. Pricing is an apartment-specific exercise: room count, floor, light, and condition drive the number more than any block average. We position the value narrative, prepare the buyer for the co-op process and the self-managed operation, and benchmark against the right comparable tier of boutique Upper East Side cooperatives.
Comparable buildings
If you're considering 238 East 84th Street, also look at these Yorkville and Upper East Side boutique cooperatives:
- 200 East 84th Street — Upper East Side building on the same block
- 103 East 84th Street — boutique Upper East Side cooperative nearby
- 114 East 84th Street — nearby Upper East Side building
- 200 East 83rd Street — Upper East Side building one block south
- 8 East 83rd Street — Upper East Side cooperative nearby
The Roebling Team at Cornasesk House
The Roebling Team at Compass specializes in the Upper East Side and the broader Manhattan cooperative and condominium market. We publish this profile because buyers and sellers of boutique cooperatives deserve building-specific intelligence — the building's structure, the self-managed operation, the staffing and amenity reality, and where pricing sits against the right comparable tier.
If you're weighing a purchase or sale at 238 East 84th Street, a 30-minute consultation is the right starting point.
The neighborhood
For the full corridor — architecture, schools, transit, and pricing across Upper East Side — read The Roebling Team Guide to Upper East Side.
Get the full picture on this building.
The full comp set, a private valuation of your line, or current and off-market availability — sent to you directly.