Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433
850 Park Avenue #9C

For Sale · Listing by Compass

850 Park Avenue #9C

Lenox Hill, Manhattan

$4,495,000

Interested in this property?
Active For Sale Co-op

$4,495,000

850 Park Avenue #9C

Lenox Hill, Manhattan

MLS® #RLS20104953

RLS at REBNY

Listing by Compass

3
Bedrooms
2.5
Baths
N/A
Sq. Ft.
1924
Year Built

Quick Summary

Bedrooms 3
Bathrooms 3 full, 1 half
Lot Size 15,836.35 sq ft
Year Built 1924
Ownership Co-op
Maintenance $6,770.27/mo
Neighborhood Lenox Hill
Floor 9 of 12

Property Highlights

  • Exposure: North,South facing
  • Fireplace: 1 fireplace
  • Climate Control: Other

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 7
Baths 2 Full, 1 Half
Floor 9 of 12
Exposure North,South
Heating Central
Cooling Other
Pets Yes, CatsOk, DogsOk
Year Built 1924
Structure Type HighRise
Flooring Hardwood
Furnished Unfurnished
Lot Size 15,836.35 sq ft
Parcel # 1391-0040-00850-000-000009C
Block/Lot 01391/0040

Listing History

Event Date Price Change
Listed Aug 24, 2026 $4,495,000 -
Currently Aug 24, 2026 $4,495,000 -

Description

Perfectly positioned in one of Park Avenue's most prestigious pre-war cooperatives, Residence 9C is a meticulously renovated seven-room home that seamlessly blends timeless architectural grandeur with the finest modern amenities. Accessed via a semi-private elevator landing, this exceptional residence offers an elegant lifestyle in one of the Upper East Side's most coveted white-glove buildings. A gracious entrance foyer introduces the home's remarkable scale, highlighted by soaring 11.5-foot ceilings, oversized windows, beautifully proportioned rooms, and impeccable craftsmanship throughout. Every detail of the renovation has been thoughtfully executed, preserving the home's classic pre-war character while elevating it for contemporary living. The sun-filled living and dining rooms are beautifully scaled for entertaining. The expansive living room is anchored by a working wood-burning fireplace, creating a warm and inviting atmosphere, while the formal dining room comfortably accommodates large gatherings. A sophisticated powder room just off the foyer completes the home's gracious entertaining spaces. At the heart of the residence is a spectacular Christopher Peacock eat-in chef's kitchen, masterfully expanded to incorporate the former staff room. Designed for both everyday living and effortless entertaining, the windowed kitchen features striking Calacatta Gold marble countertops, a Wolf gas range with custom hood, and a suite of premium appliances including Sub-Zero refrigerator and freezer columns, a beverage center, microwave, and a full-size washer and dryer. Custom cabinetry and generous pantry storage provide exceptional functionality without compromising elegance. Privately situated in its own wing, the bedroom quarters offer a tranquil retreat. The luxurious primary suite features a beautifully appointed, windowed Waterworks marble bathroom with refined metal detailing, a soaking tub, and plumbing in place for an additional vanity. Two generously sized secondary bedrooms share an equally elegant renovated bath, each finished with the same exceptional level of quality found throughout the home. Additional highlights include beautiful hardwood floors, brand-new windows, updated HVAC and plumbing systems, and a private storage unit that transfers with the apartment—providing every modern convenience while honoring the residence's historic character. Originally built in 1914 by Rouse & Goldstone, 850 Park Avenue is one of the Upper East Side's premier full-service cooperatives. Residents enjoy white-glove service along with an impressive collection of amenities, including a fitness center, laundry room, bike storage, basketball court, landscaped courtyard, and outdoor play area. The building is pet-friendly, permits financing of up to 30%, and has a 2.5% flip tax payable by the purchaser. Ideally situated between 76th and 77th Streets on one of Manhattan's most iconic avenues, Residence 9C offers the very best of Upper East Side living. Just moments from Central Park, residents enjoy immediate access to world-renowned museums, Madison Avenue's luxury boutiques, acclaimed restaurants, charming neighborhood cafés, and convenient transportation. This is a rare opportunity to own an impeccably renovated classic home in one of Park Avenue's most distinguished cooperative buildings.

Features & Amenities

Interior Features

Breakfast Bar Crown Molding Entrance Foyer Eat In Kitchen High Ceilings Walk In Closets Building Washer Dryer Install Allowed Common On Floor Common Area Laundry Room In Unit Flooring: Hardwood Fireplace (1)

Exterior Features

Building Courtyard

Building Amenities

Bike Storage Elevators Fitness Center Health Club

Appliances

Cooktop Dishwasher Wine Cooler

Building Information

Building Data View Compliance & Permits
Total Units 51
Stories 12
Structure HighRise

Financial Details

Maintenance $6,770.27/mo

Lenox Hill occupies a residential section of the Upper East Side, defined by proximity to Central Park, major medical institutions (Memorial Sloan Kettering, Weill Cornell, Lenox Hill Hospital), and the Madison Avenue retail corridor. Housing stock ranges from large pre-war cooperatives to modern condominiums with East River and skyline views.

Lenox Hill Live Market Data

View Neighborhood

Active Listings

422

Median Asking Price

$1.44M

Median $/Sqft

$1,500

Avg Days on Market

N/A

New This Week

9

Price Reduced

38%

Sold (30 Days)

47

Median Sale Price

$1.08M

Live data from RLS at REBNY • Updated 8/24/26, 10:45 AM EST

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Location

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850 Park Avenue #9C, Lenox Hill, New York County

Floor Plans

Floor Plan 1

Building Information

Official NYC property records for this building

1914
Year Built
112 years old
12
Floors
51
Residential Units
R10
Zoning District
Elevator Apartments Historic District: Upper East Side Historic District

Tax & Assessment

Assessed Value: $21,431,700
Land Value: $4,905,000
Exemptions: $6,870

Note: Individual unit taxes may differ. Verify current tax bills with NYC DOF.

Lot Area: 15,835 SF
Building Area: 149,056 SF
Built FAR: 9.41
Allowed FAR: 10

Source: NYC PLUTO (Primary Land Use Tax Lot Output), NYC Department of City Planning (data.cityofnewyork.us)

Want help estimating ownership costs or understanding building compliance? Let's discuss

Frequently Asked Questions

Common questions about this property

The current listed monthly maintenance are $6,770.27 per month. Confirm the exact amount with Milton Coste before making an offer.

The current listed annual property tax is $0, or roughly $0 per month. Verify the current assessment with your attorney before closing.

This property has 3 bedrooms and 2 full bathrooms and 1 half bathroom.

According to MLS records, the building was constructed in 1924, making it approximately 102 years old.

This listing is a co-op (stock cooperative). Buyers purchase shares in a corporation rather than real property, and the board must approve all sales.

Pets are permitted at this property. Contact Milton Coste for weight limits or breed restrictions.

To schedule a private showing, contact Milton Coste at (917) 416-7433 or milton@miltoncoste.com. Per REBNY guidelines effective 2025, a Buyer Representation Agreement is required before a buyer's broker can show you properties. You may attend open houses independently without one.

Have a question not answered here?

(917) 416-7433
MLS® ID: RLS20104953
First Listed: 7/22/2026
On Market: 8/24/2026
Contract Date: 6/22/2026

Listing Courtesy of Compass - Philip Scheinfeld

Listing Contact: (917) 446-0523

Listing information for certain New York City properties provided courtesy of the Real Estate Board of New York's Residential Listing Service (the "RLS"). The information contained in this listing has not been verified by the RLS and should be verified by the consumer. The listing information provided here is for the consumer's personal, non-commercial use. Retransmission, redistribution or copying of this listing information is strictly prohibited except in connection with a consumer's consideration of the purchase and/or sale of an individual property. This listing information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. ©2026 The Real Estate Board of New York, Inc., all rights reserved. This advertisement does not suggest that the broker has a listing in this property or properties or that any property is currently available.

Broker Commission Disclosure: Broker commissions are not set by law and are fully negotiable.

Buyer Notice: Planning to work with a buyer's broker? A Buyer Representation Agreement is required before your broker can show you properties, per REBNY/UCBA guidelines (effective 2025). You may attend open houses independently without one.

RLS at REBNY

RLS Data display by Keller Williams NYC. Data last updated on 8/24/2026 at 2:45 PM UTC

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Lenox Hill Market Update

47 sales last 30 days · $1.44M median · 9 months supply

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New listings in this neighborhood

Quick Facts

Status Active Type Co-op Neighborhood Lenox Hill Borough Manhattan
County New York
Floor 9 of 12
Year Built 1924
First Listed 7/22/2026
Maintenance $6,770.27/mo

Monthly Costs Estimate

Down Payment 20%

$899,000

Interest Rate Loading...

Source: Freddie Mac PMMS

Loan Term 30 years

Est. Monthly Payment

$0

Principal & Interest $0
PMI (under 20% down) $0
Maintenance $6,770.27
Total Monthly $0

Estimates only. Consult a lender for exact figures.

Mansion tax applies at this price point

New York State charges the buyer a mansion tax on residential purchases at $1,000,000 or more. At this asking price the tier is $3M to $4,999,999 at 1.50%, applied to the whole purchase price. It is due in cash at closing and cannot be financed.

Estimated mansion tax at asking

$67,425

Run the numbers on a different offer price

Estimate based on the asking price. Confirm your own obligation with your real estate attorney.

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