15 East 91st Street
15 East 91st Street, New York, NY 10128
Carnegie Hill, Upper East Side
BBL 1015030014 · BIN 1047014
- Year built
- 1946
- Type
- Cooperative
- Units
- 43
- Floors
- 16
- Landmark status
- Requires confirmation
- City records and our profile differ. Confirm with building management.
- Subletting by shareholders
- Not permitted
- Pied-à-terre
- Not permitted
- Pets
- Pets permitted; species and limits not stated
- Maximum financing
- 50% of the purchase price
- Flip tax
- 2.5% of the purchase price, paid by the buyer
- Flip tax
- A flip tax applies; confirm the rate at the offer stage.
- Financing
- Up to 50% financeable (50% minimum down).
- Subletting
- Not permitted — an owner-occupancy building.
- Pied-à-terre
- Not permitted.
- Pets
- Permitted, subject to Board approval.
Compiled by The Roebling Research Desk from the building’s offering plan, amendments, and related building documents (primary source dated 2026). Board policies can change by amendment — confirm at the offer stage.
Every recorded sale at this building, 2003–2025
Bedroom-by-bedroom medians, the full transfer record, and how units trade against ask.
- Recent range
- $1.6M – $6.2M
- Listing discount
- 5.6%
- Recorded transfers
- 44
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at 15 East 91st 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.
15 East 91st Street is the Schultze & Associates / Columbia School of Architecture postwar cooperative on the Carnegie Hill mansion blockfront — adjacent to the historic Otto Kahn / Convent of the Sacred Heart mansion block and the James Burden / Andrew Carnegie mansions on East 91st Street.
The building's distinction starts with its Columbia School of Architecture collaboration, an academic-design provenance uncommon among postwar Carnegie Hill cooperatives — and it is sited to match that pedigree. The mansion-block adjacency places 15 East 91st among the most architecturally consequential Gilded Age residential blocks in New York, directly beside the Carnegie mansion (now the Cooper-Hewitt Museum) and the Convent of the Sacred Heart (former Otto Kahn mansion). Governing who joins this address is the building's no-subletting policy, a buyer-screening fact of real consequence that materially narrows the investor pool.
Important policy flags: subletting is NOT allowed, the flip tax is 2.5% (higher than the 2% Carnegie Hill standard), and financing is capped at 50% (conservative).
Architecture and building operations
The 1946-1947 Schultze & Associates design — produced in collaboration with the Columbia School of Architecture — yielded a sixteen-story white-brick cooperative with Art-Deco-inflected detail. The 43-apartment configuration distributes across the building's floors with the operational profile of a small-to-mid-scale postwar Carnegie Hill cooperative.
The mansion-block adjacency is the building's single most distinguishing urban context: 15 East 91st sits within steps of the Carnegie mansion (Cooper-Hewitt Museum, 1898-1903 by Babb, Cook & Willard), the Convent of the Sacred Heart (former Otto Kahn mansion, 1918 by J. Armstrong Stenhouse and C.P.H. Gilbert), and the James Burden Mansion (1902-1905 by Warren & Wetmore).
Operations: full-service; the managing agent-managed.
Policy framework
- Type: Cooperative — board interview required
- Pets: Allowed
- Subletting: NOT allowed (significant buyer-screening fact)
- Financing maximum: 50% (conservative)
- Flip tax: 2.5%, buyer-paid (higher than the 2% standard)
- Pied-à-terre: Policy unsettled across sources — verify directly with the managing agent
- Trust, LLC, foreign buyers: Case-by-case
- Post-closing liquidity: Substantial Carnegie Hill reserves customary
- Board interview: Required
The combination of no-subletting, 50% financing, and 2.5% buyer-paid flip tax produces one of the more restrictive Carnegie Hill cross-street cooperative buyer profiles — calibrated to primary-residence ownership rather than investment or pied-à-terre use.
Application and transaction fees
Fees below are from building management's published schedule, as of September 2026. They are shown as published, item by item; no total is added because the total depends on the transaction. Deposits are listed apart from nonrefundable charges.
- Terms
- 2.5% of Gross Purchase Price
- Rate
- 2.5% of the purchase price
- Paid by
- Buyer
Source: building management's published schedule, as of September 2026
Purchase
8 items
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Application Processing FeeConditional | Paid by Buyer | When With the application | Amount $600 or $1,000 (Trust Purchase - if permitted by Corporation) | Refundable Not stated |
| Application Processing Fee for Co-applicant or GuarantorPer applicant | Paid by Buyer | When With the application | Amount $250 per Co-applicant/ Guarantor | Refundable Not stated |
| Financing FeeConditional | Paid by Buyer | When With the application | Amount $300 (if financing) | Refundable Not stated |
| Move In Fee | Paid by Buyer | When With the application | Amount $500 | Refundable Not stated |
| Lead Based Paint Disclosure Fee | Paid by Seller | When With the application | Amount $75 | Refundable Not stated |
| Closing FeePer share | Paid by Seller | When At closing | Amount $800 ($850 without a Broker) plus $0.05 per share | Refundable Not stated |
| Sale by an Estate or Trust - Closing FeePer share | Paid by Seller | When At closing | Amount $1,000 plus $0.05 per share | Refundable Not stated |
Deposits
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Move Out Deposit | Paid by Seller | When With the application | Amount $500 | Refundable Refundable |
Refinance
4 items
Management's “less refinance” schedule
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Appraisal Research and Co-Op Supplement/Certification Fee | Paid by Shareholder | When With the application | Amount $250 | Refundable Not stated |
| Financing Fee | Paid by Shareholder | When With the application | Amount $400 | Refundable Not stated |
Management's “more refinance” schedule
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Appraisal Research and Co-Op Supplement/Certification Fee | Paid by Shareholder | When With the application | Amount $250 | Refundable Not stated |
| Financing Fee | Paid by Shareholder | When With the application | Amount $400 | Refundable Not stated |
Ownership transfer
1 item
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Transfer Fee | Paid by Shareholder | When With the application | Amount Contact Transfer Agent for fee schedule | Refundable Not stated |
Management updates its schedule without a public filing. The date is when management last updated the page, not when a rule changed. Confirm the current schedule with management before you apply.
Considering an apartment here? Send Corey the listing to discuss the building's costs and purchase requirements.
Own an apartment here? Request an apartment-specific pricing review.
Financing and purchase requirements
- Maximum financing
- 50% of the purchase priceSource: building management's published schedule, as of September 2026
Sublet and pied-à-terre policy
A condominium owner leasing a unit and a co-op shareholder subletting are different rules, and a building-wide rule is different from a restriction on one apartment. This is the building's rule; confirm it for the specific apartment.
- Subletting by shareholders
- Not permittedSource: building management's published schedule, as of September 2026
- Pied-à-terre ownership
- Not permittedSource: building management's published schedule, as of September 2026
Considering an apartment here? Send Corey the listing to discuss the sublet and pied-à-terre rules for that apartment.
Pets and in-unit washer/dryer
- Pets
- Pets permitted; species and limits not statedSource: building management's published schedule, as of September 2026
- In-unit washer/dryer
- Not verified
Considering an apartment here? Send Corey the listing to confirm the pet and washer/dryer rules for that apartment.
Local Law 97
- 2024–2029 annual penalty
- $0 (under cap)
- 2030–2034 annual penalty
- $84/yr
- Per unit / month range
- $0 – $0
- Modeled exposure split equally across 44 units (the residential count on the city's lot record). Not an assessed amount; co-op shareholders are typically charged by share allocation.
Source: NYC LL84 benchmarking and PLUTO · The Roebling Research Library. City data last refreshed September 2026.
See full Local Law 97 analysis — emissions history, scenarios, methodology →Facade safety — Local Law 11
The latest available filing classified the facade as SWARMP — Safe With A Repair and Maintenance Program: the engineer identified conditions requiring monitoring or repair, with repairs due by the deadline stated in the filing. The scope, timeline, and how the building funds the work are building-specific — we review the filings and board materials for you.
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).
Penalties shown are amounts DOB assessed against filings on record across 2005–10 to 2020–25. The FISP dataset does not record whether they were paid, contested or remain open, so treat the figure as history rather than a current balance and confirm the building’s standing with the managing agent.
Source: NYC DOB facade filings (FISP) · The Roebling Research Library. City data last refreshed September 2026.
Management & transfer contacts
- Flip tax
- 2.5% per share (Buyer) / transfer fee 2.5% of gross purchase price
- Sublet policy
- Not allowed
- Pied-à-terre
- Not allowed
- Notable fees
- App processing $600 ($1,000 trust) +$250/co-applicant; move-in $500; closing $800 ($850 w/o broker)
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 |
|---|---|---|---|---|---|
| Mar 7, 2025 | 5A | 2 BR · 2 BA | $2,100,000 | +0.0% | |
| Jul 26, 2024 | 9C | 1 BR · 1.5 BA | $1,600,000 | -5.6% | |
| Apr 10, 2023 | 9A | 4 BR · 4.5 BA | $6,200,000 | -8.5% | |
| May 24, 2022 | 6A | 2 BR · 2 BA | $1,950,000 | -7.1% | |
| Feb 18, 2022 | 11FLRA | 3 BR · 3.5 BA | $2,699,999 | -8.3% | |
| Feb 17, 2022 | 11A | 3 BR · 3.5 BA · 2,400 sf | $2,780,000 | $1,158/sf | -5.6% |
| Feb 3, 2022 | 3A | 3 BR · 4.5 BA | $3,550,000 | -6.6% | |
| Jan 21, 2022 | 2E | 2 BR · 2.5 BA | $1,750,000 | -5.4% |
Market read. $/sf is measured on the latest sales with reliable square footage (2022): a median $1,191/sf (floor-adjusted) across 1 sale. The building has traded as recently as 2025. Median listing discount 5.6% 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 1-01503-0014). 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.
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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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What to know if you’re buying
The no-subletting policy. Plan primary-residence positioning at the application stage; the policy materially narrows the investor and pied-à-terre buyer pool.
The 2.5% buyer-paid flip tax is higher than the Carnegie Hill 2% standard. On a $3 million purchase, $75,000 of additional buyer cost.
The 50% financing maximum is conservative. Plan for substantial down payment; verify post-closing liquidity expectations at application.
The Schultze & Associates / Columbia School of Architecture pedigree. The academic-design provenance is uncommon among postwar Carnegie Hill cooperatives.
The mansion-block adjacency is among the most architecturally consequential urban contexts in Manhattan. Cooper-Hewitt Museum, Convent of the Sacred Heart, James Burden Mansion all within steps.
The PM management. Verify board package requirements and pied-à-terre policy directly.
Closing timelines are cooperative-standard. Plan for 6 to 10 weeks from contract through board approval to closing.
Comparable buildings
- 17 East 89th Street — Ajello 1924; nearby Carnegie Hill peer
- 131 East 93rd Street — Braun 1923 neo-Federal; nearby Carnegie Hill peer
- 14 East 90th Street — Carpenter 1928; nearby Carnegie Hill peer
- 47 East 87th Street — 1947 postwar; same-vintage Carnegie Hill peer
- 50 East 89th Street (Park Regis) — Emery Roth & Sons 1974; nearby Carnegie Hill modernist peer
Sources: The Roebling Research Library (offering plans, house rules, financial statements, board minutes, internal transaction records); NYC Department of Finance recorded transfers; publicly recorded NYC building data.
More Upper East Side buildings
- 14 East 96th Street — condominium
- 15 East 69th Street (The Westbury) — 1927 condominium
- 15 East 82nd Street — 1894 condominium
- 16 East 80th Street — 1886 co-op
- 16 East 96th Street — 1906 co-op by Clinton & Russell
- 16 East 98th Street — 1925 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 15 East 91st 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