343 East 78th Street
343 East 78th Street, between First and Second Avenues · Upper East Side
BBL 1014530017 · BIN 1045247
- Year built
- 1910
- Type
- Cooperative
- Amenities
- Building laundry
- Landmark status
- Not an individual landmark; not in a historic district
- NYC Landmarks Preservation Commission and City Planning records, updated February 2026
- Dogs
- Requires confirmation
- Our building profile and the source for this line differ. Confirm with building management.
- Cats
- Permitted
- Washer/dryer
- Permitted with conditions
- Doorman
- No doorman
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at 343 East 78th 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.
343 East 78th Street is a low-rise cooperative with an unusually varied set of interiors for a dozen-residence building. Split-level duplexes, larger combined homes and smaller apartments share the address. Private balconies and a garden accompany selected homes, while wood-burning fireplaces and exposed brick appear within the prewar structure. The building sits east of Second Avenue on a residential side street.
Architecture and unit composition
Several one-bedroom homes are arranged across two levels and have two bathrooms. Interior staircases separate living and sleeping areas, and some duplexes have a balcony on each level. Apartment sizes in the resale history commonly fall around 750 to 800 square feet, with larger combined homes extending beyond that range.
The garden accommodation combines multiple rooms over two floors, with a balcony overlooking private outdoor space. Its additional library or work areas are distinct from the legal bedroom count. The building also contains compact studio accommodation, producing a wider range of purchase sizes than the exterior's modest scale suggests.
Building operations
The cooperative is a walk-up with building laundry. In-unit washer/dryers occur in selected apartments. A buyer of an upper duplex encounters both the common stairs and an internal staircase; a lower garden home has a different approach and circulation pattern.
The building has no recorded tax abatement and falls under Class 2. The building pairs an older common structure with separately renovated interiors, so one apartment's condition doesn't tell you when shared masonry, roof or mechanical work was last done.
Policy framework
Pets: Cats allowed; dogs are not permitted — confirm with the managing agent.
Pied-à-terre: Allowed — confirm with the managing agent.
Pets and in-unit washer/dryer
- Dogs
- Requires confirmationOur building profile and the source for this line differ. Confirm with building management.
- Cats
- PermittedSource: The Roebling Team's building profile
- In-unit washer/dryer
- Permitted with conditionsSome apartmentsSource: The Roebling Team's building profile
Considering an apartment here? Send Corey the listing to confirm the pet and washer/dryer rules for that apartment.
Own an apartment here? Request an apartment-specific pricing review.
Building staffing and amenities
- Doorman
- No doormanSource: The Roebling Team's building profile
- Elevator
- NoSource: NYC Department of City Planning records (PLUTO)
- Amenities noted
- Laundry roomSource: The Roebling Team's building profile
Staffing and amenities as our building profile and recent listing records describe them. A feature not listed is not confirmed absent. Outdoor space, parking and some facilities can belong to particular apartments or to a separate owner; confirm access for the specific apartment.
Local Law 97
This building is below the 25,000 sq ft threshold at which LL97 limits apply to a building on its own. It is still covered if it shares a tax lot or condominium board with buildings totaling over 50,000 sq ft; confirm on DOB’s covered-buildings list.
See full Local Law 97 analysis →Recent sales
Recent transfers at this building, from The Roebling Research Library. 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 |
|---|---|---|---|---|---|
| Feb 4, 2025 | BD | 2 BR · 2 BA · 1,100 sf | $999,000 | $908/sf | -9.1% |
| Nov 1, 2018 | 3 | 1 BR · 1 BA | $580,000 | -3.2% | |
| Jul 11, 2014 | 5 | 1 BR · 750 sf | $390,000 | $520/sf | -2.3% |
| Mar 18, 2009 | 8 | 1 BR · 2 BA · 800 sf | $460,000 | $575/sf | -17.9% |
| Aug 29, 2007 | 6 | 1 BR · 780 sf | $469,000 | $601/sf | -2.1% |
| Jun 4, 2007 | 1 | 1 BR | $460,000 | +0.0% | |
| Jan 27, 2004 | 5 | 1 BR | $325,000 | +0.0% |
Market read. Most recent trades (2025) cleared a median $908/sf (recorded) across 1 sale. Median listing discount 2.3% 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.
Sales sourced from NYC Department of Finance recorded transfers (BBL 1-01453-0017). Apartment-level facts (line, condition, asking-price context) curated and cross-verified in The Roebling Research Library. 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 would your apartment rent for?
Enter your apartment and I'll send you what it would rent for, from comparable closed leases at 343 East 78th Street and nearby.
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
- 325 East 79th Street — A nearby prewar cooperative offering a much larger apartment-house setting.
- 240 East 79th Street — Another neighborhood prewar cooperative for comparing low-rise ownership with a larger building.
- The Morgan Studios — A prewar cooperative whose studio-building architecture provides a useful comparison for unconventional interior volumes.
- 139 East 79th Street — A small cooperative association in a much taller building, illustrating a different distribution of shared costs.
- The Gordon — A small-inventory prewar cooperative west of Lexington Avenue with a different building scale and setting.
More Upper East Side buildings
- 340 East 74th Street (The Avon House) — 1957 condop
- 340 East 93rd Street (Plymouth Tower) — 1980 co-op by SLCE Architects
- The St. Tropez (340 East 64th Street) — 1964 condominium
- 345 East 73rd Street (The Morad Diplomat) — 1961 co-op
- 345 East 86th Street — 1971 co-op
- 345 East 93rd Street (Mill Rock Plaza) — 1974 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.
Considering a move at 343 East 78th Street?
Request a private building brief with the relevant comparable sales, current and off-market availability, and an apartment-specific view of value.
646.939.7375 · c.cohen@compass.com