436 East 66th Street
436 East 66th Street, between First and York Avenues · Upper East Side
Lenox Hill, Upper East Side
BBL 1014600032 · BIN 1045400
- Year built
- 1910
- Type
- Cooperative
- Landmark
- No
- Amenities
- Landscaped common roof deck, bicycle storage and private storage cages
Every recorded sale at this building, 2007–2026
Price-per-square-foot over time, the line- and floor-premium curves, and every recorded sale.
- Median $/sf
- $993
- Listing discount
- 3.8%
- Recorded sales
- 11
- On record
- 2007–2026
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at 436 East 66th 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.
436 East 66th Street is a five-story walk-up with ten apartments, including floor-through one-bedroom layouts and a garden home at the base. Its shared roof deck gives upper-level outdoor access to the cooperative, while private storage cages and bicycle space extend the building's utility beyond the apartments.
The building stands on the First-to-York Avenue block of East 66th Street. Its early-twentieth-century construction accommodates long apartment plans with front and rear exposures. Primary-residence rules shape its use: the cooperative does not permit investor purchases or subletting, subject to confirmation of the current rules with the managing agent.
Architecture and unit composition
One-bedroom configurations include homes around 700 square feet. Floor-through plans draw light from the north and south, with the principal rooms arranged at opposite ends of the apartment. Some incorporate an office nook or an additional interior room alongside the main bedroom and living space.
Decorative fireplaces and wood flooring are part of the surviving prewar character. Renovations have changed kitchens, bathrooms and storage arrangements, and some homes have in-unit laundry. The garden configuration adds a private rear yard, giving it an outdoor feature distinct from the building's common roof deck.
All upper apartments require a stair climb. The shared roof sits above the fifth floor, so its use also involves the common stair. At the lower levels, the rear yard brings an outdoor setting reached directly from the apartment.
Building operations
The common landscaped roof deck, bicycle area and private storage cages are the principal building amenities. Storage cages have been included without a separate charge — confirm the current allocation and charges with the managing agent. The cooperative has no elevator to operate or replace.
With ten residences, major work is funded across a small shareholder base. The common roof's planted and furnished areas make access and upkeep part of the building's regular operations.
Recent sales
Recent transfers at this building, curated by The Roebling Team research desk. Prices are the transfer amounts recorded with the NYC Department of Finance; apartment-level detail is checked against the building’s own file in The Roebling Research Library before publishing.
| Date | Unit | Apartment | Price | PPSF | vs. Ask |
|---|---|---|---|---|---|
| Aug 5, 2026 | 4E | 1 BR · 1 BA · 700 sf | $695,000 | $993/sf | off-mkt |
| May 30, 2025 | 1W | 1 BR · 1 BA · 700 sf | $840,000 | $1,200/sf | -1.2% |
| Aug 17, 2023 | 4W | 1 BR · 1 BA · 700 sf | $504,000 | $720/sf | +1.0% |
| Jan 13, 2021 | 3E | 1 BR · 1 BA · 700 sf | $650,000 | $929/sf | +0.0% |
| Oct 30, 2020 | 1W | 1 BR · 1 BA · 700 sf | $768,500 | $1,098/sf | -3.8% |
| Feb 23, 2017 | 5W | 1 BR · 1 BA · 700 sf | $400,000 | $571/sf | -5.9% |
| Jan 24, 2014 | 3E | 1 BR · 698 sf | $485,000 | $695/sf | +4.3% |
| Sep 26, 2012 | 2E | 1 BR · 1 BA | $295,000 | -6.3% |
Market read. Most recent trades (2026) cleared a median $993/sf across 1 sale. Median listing discount 3.8% 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.
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 1-01460-0032) 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.
Buying here? Co-op closing costs typically run 2 to 3% of the price. See NYC co-op and condo closing costs, line by line.
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Comparable buildings
- 434 East 58th Street — A low-rise cooperative with 24 residences and an elevator, useful for weighing stair access against a larger association.
- 1376 York Avenue — A small prewar cooperative with retail below, offering another modest-scale ownership building east of First Avenue.
- 139 East 66th Street — A 20-residence elevator cooperative with part-time service, on the same crosstown street.
- 108 East 66th Street — An 18-residence prewar cooperative arranged over ten floors, with a taller building form and elevator access.
- 901 Lexington Avenue — A 17-residence cooperative with full-time doorman service, providing a higher-service comparison.
More Upper East Side buildings
- 427 East 90th Street — 2019 condominium by Isaac & Stern Architects
- 435 East 65th Street — 1963 co-op
- 435 East 76th Street — 2000 condop
- 436 East 84th Street (Claiborne House) — 1963 co-op
- 436 East 86th Street — 1973 co-op
- 437 East 86th Street — 1961 co-op
The neighborhood
For the full corridor — architecture, transit, and pricing across Upper East Side — read The Roebling Team Guide to Upper East 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.
How to read the facts on this page. Items attributed to an offering plan describe the building as it was offered at that filing — unit mix, square footage, the amenity program as planned. They are not a statement about how the building operates today. Tax and compliance figures are sourced separately to current City records and carry their own dates. House rules, staffing and fee policy can change by board resolution without any public filing: treat every policy line here as a starting point for diligence and confirm it with the managing agent. Where this page compares one building or neighborhood to another, that is our analysis of the recorded record — it names the measure, the period and the sample it rests on, and it is an observation about medians rather than a prediction about any particular apartment.
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