310 East 70th Street
310 East 70th Street, New York, NY 10021
Lenox Hill, Upper East Side
BBL 1014440043 · BIN 1044830
- Year built
- 1959
- Type
- Cooperative
- Units
- 134
- Floors
- 12
- Landmark
- No
- Pets
- Pets permitted
Every recorded sale at this building, 2003–2026
Bedroom-by-bedroom medians, the full transfer record, and how units trade against ask.
- Studio median
- $406K
- Recent range
- $345K – $2.4M
- Listing discount
- 1.3%
- Recorded transfers
- 160
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at 310 East 70th 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.
310 East 70th Street is a full-service white-brick postwar cooperative in the heart of Lenox Hill — a 1959 building on a quiet residential block between First and Second Avenues that offers the amenity depth of a large postwar co-op at accessible cross-street pricing. With 134 apartments across 12 floors, it is sized to support a full staff, an attended entrance, and an on-site garage while retaining the operational manageability of a mid-scale building.
The building's appeal rests on a combination that is genuinely useful for a co-op: permissive pet and pied-à-terre policies alongside relatively high financing flexibility. Public records indicate the cooperative permits up to 75% financing on fixed-rate mortgages — generous by prewar co-op standards — and welcomes both pets and pied-à-terre owners. For buyers who want postwar light, a roof deck, a garage, and a full-service address in Lenox Hill without a co-op's typical financing constraints, 310 East 70th is a structurally strong option.
Architecture and building operations
Built in 1959 and converted to cooperative ownership in 1988, 310 East 70th Street is a 12-story white-brick postwar apartment house with 134 residences. The building presents a canopied entrance with polished gray granite and decorative ironwork, sidewalk landscaping, and a lobby that has been renovated in recent years — a well-kept postwar presentation on a low-traffic Lenox Hill block.
Operations are full-service. The building maintains a doorman and a live-in superintendent, a central laundry room, common storage, a bike room, and an on-site garage offered to residents at a discounted rate and accessible directly via the building's elevators. A landscaped roof deck provides open-air common space with city views. In-unit washer/dryers are not permitted, a common restriction in postwar co-ops of this vintage; buyers should confirm any laundry and alteration rules against the current house rules.
Policy framework
- Type: Cooperative — board interview required
- Pets: Permitted
- Pied-à-terre: Permitted
- Financing maximum: Up to 75% reported (fixed-rate mortgages); confirm current guidance with the managing agent at offer stage
- Flip tax: Confirm structure and rate with the managing agent at offer stage
- Subletting: Board approval required
- Trust, LLC, foreign buyers: Generally case-by-case; confirm at contract
- Board interview: Required
Local Law 97
- 2024–2029 annual penalty
- $0 (under cap)
- 2030–2034 annual penalty
- $73,545/yr
- Per unit / month range
- $0 – $45
- Modeled exposure split equally across 135 units (the city tax-lot count). Not an assessed amount; co-op shareholders are typically charged by share allocation.
Source: NYC LL84 benchmarking and PLUTO · The Roebling Research Library. City record last verified September 2026.
See full Local Law 97 analysis — emissions history, scenarios, methodology →Facade safety — Local Law 11
The latest available FISP filing classified the facade as Safe — no repairs were required at that inspection. Facade inspections run on a fixed five-year cycle; future inspection, repair, and any assessment decisions remain building-specific.
How to read this, and where it comes from
QEWI = Qualified Exterior Wall Inspector — the licensed engineer the city requires to sign the report (the independent expert, not the managing agent).
Source: NYC DOB facade filings (FISP) · The Roebling Research Library. City record last verified September 2026.
Management & transfer contacts
- Sublet policy
- Must own 5 consecutive yrs before subleasing; max 2-yr term then 5-yr wait; sublease fee = 10% annual maintenance; subtenants no pets
- Pied-à-terre
- Allowed
- Notable fees
- Buyer processing $750; credit check $75/applicant; move-in/out deposits $1,000; refinance $400; sublet renewal $150; max financing 75% (fixed only); 47% tax deductibility
Recent sales
As a cooperative, 310 East 70th Street trades on a price-per-room and maintenance-driven basis rather than the price-per-square-foot framing used for condominiums. Value here reflects the building's postwar layouts — efficient studio-through-two-bedroom lines with good light — its full-service operation and roof deck, and its Lenox Hill cross-street location, which sits at a discount to the Park-and-Fifth corridor.
Two policy features support liquidity and pricing relative to peer co-ops: the reported 75% financing ceiling, which widens the qualified-buyer pool, and the permissive pet and pied-à-terre stance. Monthly maintenance covers heat, water, and gas; buyers should weigh maintenance and any assessments against comparable buildings. Specific closed prices vary by floor, line, light, and condition, and should be underwritten against current recorded transfers and in-building comparables rather than headline averages.
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 |
|---|---|---|---|---|---|
| Aug 20, 2026 | 10G | 1 BA | $399,000 | +0.0% | |
| Apr 21, 2026 | 10E | 2 BR · 2 BA | $1,350,000 | -3.2% | |
| Apr 7, 2026 | 10L | 1 BR · 1 BA · 900 sf | $520,000 | $578/sf | -3.7% |
| Sep 4, 2025 | 4LM | 4 BR · 3 BA · 2,214 sf | $2,386,000 | $1,078/sf | -0.4% |
| Jul 7, 2025 | 4JK | 3 BR · 3 BA | $2,250,000 | +18.7% | |
| Jan 13, 2025 | 12Q | 2 BR · 1 BA · 900 sf | $895,000 | $994/sf | -0.6% |
| Jan 6, 2025 | 7G | 1 BA | $412,000 | +9.9% | |
| Nov 22, 2024 | 10J | 1 BA · 525 sf | $420,000 | $800/sf | +10.5% |
Market read. Most recent trades (2026) cleared a median $580/sf (floor-adjusted) across 1 sale. Floor-adjusted means each sale is restated to a constant mix of floors, so the figure can differ from the plain median of the sales listed above. Median listing discount 2.5% 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 1-01444-0043). 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.
Closed rents at 310 East 70th Street, last 36 months
| Size | Leases | Median / month |
|---|---|---|
| 1 bedroom | 2 | $3,395 |
4 closed sublet leases, October 2023 to September 2026. Most recent lease May 2025. Based on few leases. Sizes with fewer than 2 leases are not shown. Compiled by The Roebling Team at Compass from closed leases.
At the recent median sale of $799K (9 transfers since 2024), a buyer putting 25% down would pay about $11,546 to close, or 1.4% of the price.
- Mansion tax: $0
- No mortgage recording tax or title insurance on a co-op purchase
- Attorneys, lender, building fees and filings: $11,546
Assumes a resale (the seller pays transfer taxes), a $4,500 attorney fee and a mortgage on the rest.
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What to know if you’re buying
- Financing flexibility is a real advantage. A reported ceiling of up to 75% is generous for a co-op and broadens the buyer pool; confirm the current figure with the managing agent.
- Policies are owner-friendly. Pets and pied-à-terre use are permitted, which is not universal among postwar co-ops and supports both use and resale.
- The amenity set is complete for the vintage — doorman, live-in super, roof deck, storage, bike room, and a discounted resident garage reachable by elevator.
- Confirm the house rules on laundry and alterations. In-unit washer/dryers are reported as not permitted; verify before planning any renovation.
- Expect a board interview and standard co-op diligence, with maintenance covering heat, water, and gas.
What to know if you’re selling
- Lead with financing and policy flexibility. The reported 75% financing ceiling plus pet and pied-à-terre allowances are strong talking points against more restrictive neighboring co-ops.
- Highlight the full-service package and roof deck, and the convenience of an on-site discounted garage — meaningful in this pocket of Lenox Hill.
- Position maintenance clearly. Coverage of heat, water, and gas is a value point when documented against peer buildings.
- Anchor pricing to recent in-building and immediate-block comparables, adjusted for floor, line, and condition.
Comparable buildings
- 404 East 66th Street (Hardenbrook House) — nearby Lenox Hill condominium
- 304 East 65th Street (The Rio) — nearby full-service Lenox Hill condominium
- 1440 Second Avenue — nearby full-service Lenox Hill cooperative
- 308 East 72nd Street — nearby Lenox Hill peer
- 188 East 70th Street — same cross-street Lenox Hill peer
More Upper East Side buildings
- 306 East 82nd Street — 2008 condominium
- 308 East 72nd Street (The Knickerbocker) — 1996 condominium by SLCE Architects
- 308 East 79th Street — 1928 co-op by Jacob M. Felson
- 310 East 86th Street (The Harper) — 2021 condominium
- 311 East 83rd Street — 1978 co-op
- 311 East 87th Street — 1959 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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