- Year built
- 1924
- Type
- Cooperative
- Units
- 10
- Floors
- 14
- Landmark status
- Not an individual landmark; in the Upper East Side Historic District
- NYC Landmarks Preservation Commission records, updated February 2026
- Subletting by shareholders
- Not permitted
- Pied-à-terre
- Permitted
- Pets
- Pets permitted; species and limits not stated
- Washer/dryer
- Permitted
- Flip tax
- 3% of the purchase price, paid by the buyer
- Doorman
- Full-time doorman
- Flip tax
- A flip tax applies, paid by the buyer; confirm the rate at the offer stage.
- Subletting
- Not permitted — an owner-occupancy building.
- Pied-à-terre
- Permitted.
- Washer / dryer
- Permitted in-unit.
- Pets
- Permitted, subject to Board approval.
- Co-purchasing
- Permitted. Parents purchasing for children permitted.
- Guarantors
- Not permitted.
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.
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at 898 Park Avenue 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.
898 Park Avenue is among the most architecturally distinctive boutique pre-war cooperatives on the Lenox Hill / Carnegie Hill seam of Park Avenue and a structurally exceptional commission within the broader 1920s Park Avenue building cycle. Designed in 1924 by John Sloan and Albert Nast ("Sloan & Nast") for developer Henry Mandel's Mandel-Ehrich Corporation, the 14-story building was originally configured as 6 duplex apartments plus a grand ballroom — an unusual configuration that distinguished 898 Park sharply from the conventional Park Avenue cooperative apartment-house tradition. The 1953 cooperative conversion and subsequent subdivisions produced the current 10-apartment configuration.
The architectural register is structurally distinctive. The yellow- and brown-pitted brick masonry façade is articulated by brightly colored terracotta decoration — an architectural composition that places 898 Park outside the broader Italian Renaissance / Georgian house style that dominated the 1920s Park Avenue residential mainline. The result is one of the architecturally most distinctive small-scale pre-war cooperatives on the corridor.
John Sloan would later design 895 Park Avenue (1929) — across the avenue from 898 Park — producing a structural architectural pairing of two Sloan-designed buildings on the same Park Avenue intersection. Developer Henry Mandel was one of the larger speculative apartment-house developers of the 1920s; his career would later be financially ruined by the Depression.
The building's defining structural feature is its private elevator entry to each apartment — a configuration uncommon on Park Avenue and a function of the original 6-duplex plan. The 10-apartment intimate scale produces a cooperative culture calibrated to the boutique pre-war tradition.
The building's most consequential recent transactional history is documented in August 2021 reporting: Valerie Mnuchin (sister of Steven Mnuchin) sold the triplex penthouse on August 9, 2021 for less than she paid for it in 2014. The marketing process produced a buyer dispute and litigation; Mnuchin sued the buyers over their deposits. The penthouse, configured at approximately 4,100 square feet with a wraparound terrace, has since been relisted, restructured to a 4-bedroom, 5.5-bathroom configuration from the prior 7-bedroom layout.
Architecture and unit composition
The 10 cooperative apartments distribute across the building's 14 stories. The original 6-duplex configuration produced the structural architectural feature of private elevator entry to each apartment; subsequent subdivisions have produced the current apartment inventory while preserving the broader configuration framework. Apartment layouts carry the architectural fabric characteristic of Sloan & Nast's 1924 design — substantial ceiling heights, formal entry arrangements, and the architectural finish specifications of pre-Depression Park Avenue luxury construction.
The triplex penthouse — approximately 4,100 square feet with a wraparound terrace — is the building's structural apex apartment.
Building operations
898 Park operates as a small-scale full-service cooperative with full-time doorman and full-time live-in superintendent. The amenity infrastructure includes elevator service to each apartment and laundry and storage facilities in the basement. The building does not carry an on-site garage.
The cooperative policy framework — pet-friendly, pied-à-terre permitted — is notably flexible by Park Avenue cooperative standards. Specific financing maximum, flip tax structure, and sublet duration limits should be verified directly with management.
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
- Equal to 3% of of the purchase price
- Rate
- 3% of the purchase price
- Paid by
- Buyer
Source: building management's published schedule, as of September 2026
Purchase
6 items
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Application Processing Fee | Paid by Buyer | When With the application | Amount $600 | Refundable Non-refundable |
| Background Check FeePer applicant | Paid by Buyer | When With the application | Amount $100 per applicant/occupant | Refundable Non-refundable |
| Credit Check FeePer applicant | Paid by Buyer | When With the application | Amount $75 per applicant/occupant | Refundable Non-refundable |
| Messenger Fees | Paid by Buyer | When With the application | Amount $65 | Refundable Non-refundable |
| Managing Agent's FeeConditional | Paid by Seller | When At closing | Amount $900 (If Seller is an Individual) $1000 (If Seller is an Estate) | Refundable Non-refundable |
| New York State Stamp TaxPer share | Paid by Seller | When At closing | Amount $0.05 per share | Refundable Non-refundable |
Ownership transfer
4 items
Fees and charges
| Item | Paid by | When | Amount | Refundable |
|---|---|---|---|---|
| Application Processing Fee | Paid by Buyer | When With the application | Amount $600 | Refundable Non-refundable |
| Background Check FeePer applicant | Paid by Buyer | When With the application | Amount $100 per applicant/occupant | Refundable Non-refundable |
| Credit Report FeePer applicantRequired | Paid by Buyer | When With the application | Amount $75 per applicant/occupant | Refundable Non-refundable |
| Messenger Fee | Paid by Buyer | When With the application | Amount $65 | Refundable Non-refundable |
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
- Guarantors
- Not permittedSource: building management's published schedule, as of September 2026
- Co-purchasing
- PermittedSource: building management's published schedule, as of September 2026
- Parent buying for an employed child
- Permitted with conditionsWill be considered on a case by case basis.Source: building management's published schedule, as of September 2026
- Parent buying for a student child
- Not permittedSource: building management's published schedule, as of September 2026
- Purchase or lease by a corporation
- Not permittedSource: 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
- PermittedSource: building management's published schedule, as of September 2026
- Short-term rentals
- 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
- PermittedSource: building management's published schedule, as of September 2026
Considering an apartment here? Send Corey the listing to confirm the pet and washer/dryer rules for that apartment.
Building staffing and amenities
- Doorman
- Full-time doormanSource: The Roebling Team's building profile
- Live-in superintendent
- YesSource: The Roebling Team's building profile
- Elevator
- YesSource: NYC Department of City Planning records (PLUTO)
Staffing and amenities as our building profile and recent listing records describe them. A feature not listed is not confirmed absent.
Local Law 97
- 2024–2029 annual penalty
- $0 (under cap)
- 2030–2034 annual penalty
- $8,994/yr
- Per unit / month range
- $0 – $50
- Modeled exposure split equally across 15 units (the residential count on the city's lot record). Not an assessed amount; co-op shareholders are typically charged by share allocation.
- At the 10 residences in our building profile: $0 – $75. The two counts differ; confirm the count with the building.
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 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).
Source: NYC DOB facade filings (FISP) · The Roebling Research Library. City record last verified September 2026.
Management & transfer contacts
- Flip tax
- 3% of purchase price, paid by Buyer at closing
- Sublet policy
- Not allowed
- Pied-à-terre
- Allowed (secondary residence allowed; co-purchasing allowed)
- Notable fees
- No underlying mortgage; financing not permitted. Managing Agent's Fee $900 ($1000 estate); NYS Stamp Tax $0.05/share
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 |
|---|---|---|---|---|---|
| Apr 2, 2025 | 4 | 2 BR · 2.5 BA | $2,600,000 | -23.4% | |
| Feb 9, 2022 | 3 | 3 BR · 2.5 BA · 2,000 sf | $2,875,000 | $1,438/sf | -17.7% |
| Jul 26, 2021 | PH | 7 BR · 5.5 BA | $7,700,000 | -12.0% | |
| Sep 21, 2016 | 4 | 2 BR | $3,500,000 | -32.0% | |
| May 1, 2014 | PH | 7 BR · 5.5 BA · 4,100 sf | $8,350,000 | $2,037/sf | -16.1% |
| Mar 4, 2014 | 8 | 3 BR · 2.5 BA | $3,290,000 | -8.5% | |
| Oct 19, 2012 | 14 | 3 BR · 2,200 sf | $3,495,000 | $1,589/sf | +0.0% |
| Nov 14, 2003 | 14 | 3 BR · 2,200 sf | $2,395,000 | $1,089/sf | off-mkt |
Market read. $/sf is measured on the latest sales with reliable square footage (2022): a median $1,438/sf (recorded) across 1 sale. The building has traded as recently as 2025. Median listing discount 16.1% 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 1-01393-0038). 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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What to know if you’re buying
The Sloan & Nast architectural pedigree is structurally distinctive. The 1920s yellow-and-brown brick masonry with terracotta detailing is outside the Italian Renaissance / Georgian house style that defined the 1920s Park Avenue mainline; the architectural composition is structurally distinguishing.
The original 6-duplex configuration produces structural apartment-level features. Private elevator entry to each apartment is uncommon on Park Avenue and a function of the original architectural plan.
The 10-unit boutique scale produces a specific cooperative culture. Among the smallest cooperatives on the Park Avenue corridor.
Pied-à-terre and pet policies are flexible by Park Avenue standards. Materially more accommodating than typical Park Avenue cooperative norms.
The recent transactional history is part of the building's contemporary market context. The 2021 Mnuchin penthouse transaction and the subsequent litigation history are documented in trade press; sophisticated buyers will research this history themselves.
Verify operational specifics during due diligence. Specific board approval framework, financing structure, sublet duration limits, current capital project pipeline, and the LL11 façade cycle on the 1924 vintage should be reviewed.
Closing timelines are cooperative-standard. Plan for 6–10 weeks from contract through board approval to closing.
What to know if you’re selling
Marketing should emphasize the architectural distinctiveness and the boutique scale. Both are structural identity features.
The triplex penthouse occupies its own pricing category. Apartment-level comparable analysis on the 10-unit scale requires close attention to the specific configuration variation.
Closing timelines are cooperative-standard.
Comparable buildings
If you're considering 898 Park Avenue, also evaluate:
- 895 Park Avenue — John Sloan 1929; same-architect Park Avenue peer across the avenue
- 888 Park Avenue — Schwartz & Gross 1925–26; immediate Park Avenue Historic District peer
- 940 Park Avenue — pre-war Park Avenue peer
- 778 Park Avenue — Candela 1931; pre-war Park Avenue trophy peer
- 998 Fifth Avenue — McKim, Mead & White 1912; pre-WWI Fifth Avenue trophy peer
More Park Avenue buildings
- 888 Park Avenue — 1925 co-op by Schwartz & Gross
- 891 Park Avenue — 1931 co-op
- 895 Park Avenue — 1929 co-op
- 900 Park Avenue (The Park 900) — 1973 condominium by Philip Birnbaum & Associates
- 910 Park Avenue — 1924 co-op by Schwartz & Gross
- 911 Park Avenue (The Alvarado) — 1927 co-op by Schwartz & Gross
The neighborhood
For the full corridor — architecture, transit, and pricing across Park Avenue — read The Roebling Team Guide to Park Avenue.
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 898 Park Avenue?
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646.939.7375 · c.cohen@compass.com