For Sale · Listing by Corcoran Group
21 E 90TH Street #9C
Carnegie Hill, Manhattan
$2,590,000
21 E 90TH Street #9C
MLS® #RLS20110420
Listing by Corcoran Group
Open House Scheduled
Sunday, September 20 • 12:00 PM – 1:00 PM
REBNY 2025: signed Buyer Representation Agreement required before any showing.
- 2
- Bedrooms
- 2
- Baths
- 1,500
- Sq. Ft.
- 1927
- Year Built
Quick Summary
Property Highlights
- Views: Other
- Exposure: East,West facing
- Fireplace: 1 fireplace
Property Details
Listing History
| Event | Date | Price | Change |
|---|---|---|---|
| Listed | Sep 16, 2026 | $2,590,000 | - |
| Currently | Sep 17, 2026 | $2,590,000 | - |
Description
Welcome to 21 East 90th Street, Apartment 9C A rare opportunity to create your dream home in the heart of Carnegie Hill, this spacious five-room residence offers the trifecta of what makes a New York apartment special: views, wonderful bones, and an exceptional location. Set in a prestigious pre-war, full-service, white-glove cooperative, the apartment is entered from a gracious semi-private landing, shared by just two apartments, into a large proper foyer. From the moment you enter, the expansive outlook and abundant light is immediately apparent, with views of a magnificent neighboring building, rooftops, open sky, and, most spectacularly, from one of the bedrooms, views toward Central Park and the West Side across the Reservoir. Wait until you see those sunsets! The residence offers two oversized bedrooms, each with walk-in closets and en-suite windowed bathrooms, each equally easy to designate as the primary. The large windowed kitchen (housing the highly coveted in-unit washer and dryer), and adjacent breakfast room gives you plenty of space to be creative. The generously proportioned living room, centered on a decorative fireplace, provides an inviting setting for both everyday living and entertaining, while the formal dining room is large enough to comfortably accommodate many guests and celebrations. One of the co-op's most distinctive conveniences is its service entrance, an enduring hallmark of classic Upper East Side living. Deliveries, groceries, dry cleaning, mail, and garbage can all be handled discreetly through the service door. The building also offers a full time doorman, a friendly and helpful support staff, live-in superintendent, and a small workout room, providing the level of service and convenience that define white-glove living. Perfectly situated in the center of Carnegie Hill, 21 E. 90th St. welcomes pets and pied-à-terre living. There is a 2% flip tax and 50% financing is allowed. The coop benefits from stable commercial income keeping the monthlies lower than many other buildings in the neighborhood. There is FIOS available, and a dedicated storage bin transfers with the sale. While in need of updating and ready for your vision, its generous proportions, pre-war character, excellent layout, and extraordinary views provide the ideal foundation for creating a truly exceptional home. Just half a block from Central Park and Museum Mile, you are surrounded by the best of the Upper East Side: Madison Avenue's elegant boutiques and restaurants, recognizable names along with beloved mom-and-pop establishments, world class schools and museums, and convenient access to public transportation. With its remarkable views, gracious proportions, exceptional building services, and prime Carnegie Hill location, 9C is a good fit for customers seeking a particular style of living.
Features & Amenities
Interior Features
Exterior Features
Building Amenities
Appliances
Building Information
Financial Details
About Carnegie Hill
View All Carnegie Hill ListingsCarnegie Hill is a low-traffic residential section of the Upper East Side defined by proximity to Central Park and Museum Mile. The area features low-rise historic architecture and large pre-war cooperatives, with landmarked blocks and boutique retail along Madison Avenue.
Carnegie Hill Live Market Data
View NeighborhoodActive Listings
95
Median Asking Price
$2.25M
Median $/Sqft
$1,711
Avg Days on Market
N/A
New This Week
15
Price Reduced
31%
Sold (30 Days)
13
Median Sale Price
$2.13M
Live data from RLS at REBNY • Updated 9/16/26, 9:33 PM EST
Similar Listings in Carnegie Hill
View All25 E 86TH Street #9A
Co-op • RLS #RLS20115567
1230 Park Avenue #6A
Co-op • RLS #RLS20065572
16 E 96th Street #7F
Co-op • RLS #RLS20113209
134 E 93RD Street #11B
Condo • RLS #RLS20115589
166 E 92ND Street #3F
Co-op • RLS #RLS20104832
14 E 92nd Street #PH4
Co-op • RLS #RLS20113458
Browse More NYC Properties
In This Neighborhood
By Property Type
By Borough
Location
21 E 90TH Street #9C, Carnegie Hill, New York County
Floor Plans
Building Information
Official NYC property records for this building
Tax & Assessment
Note: Individual unit taxes may differ. Verify current tax bills with NYC DOF.
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
Listing Data
RLS® at REBNY (Real Estate Board of New York) via Trestle API. Updated in real-time.
Building Data
NYC PLUTO (Primary Land Use Tax Lot Output), NYC Department of City Planning. Updated quarterly.
Market Data
RLS® at REBNY (Real Estate Board of New York). Live data updated in real-time.
Map & Location
OpenStreetMap contributors via Leaflet. Geocoding via Nominatim.
All data is provided for informational purposes only and should be independently verified. See our Data Sources Policy for more information.
Frequently Asked Questions
Common questions about this property
The current listed monthly maintenance are $3,804 per month. Confirm the exact amount with Milton Coste before making an offer.
This property has 2 bedrooms and 2 full bathrooms.
The listed interior living area is 1,500 square feet. Verify dimensions independently during due diligence.
According to MLS records, the building was constructed in 1927, making it approximately 99 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.
At the current list price of $2,590,000 for 1,500 sq ft, the asking price per square foot is approximately $1,727. This figure is for reference only and may differ from appraised or assessed values.
To schedule a private showing, contact Milton Coste at (917) 416-7433 or [email protected]. 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) 416-7433Listing Courtesy of Corcoran Group - Linda Feder
Listing Contact: (917) 679-1739
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 Data display by Keller Williams NYC. Data last updated on 9/17/2026 at 1:33 AM UTC
See it in person
Interested in this property?
Thank you!
Milton will contact you shortly.
Your info is secure and never shared.
Carnegie Hill Market Update
13 sales last 30 days · $2.25M median · 7.3 months supply
Read Full ReportNew listings in this neighborhood
You're signed up!
You'll be notified when new listings appear in Carnegie Hill.
Quick Facts
Monthly Costs Estimate
$518,000
Source: Freddie Mac PMMS
Est. Monthly Payment
$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 $2M to $2,999,999 at 1.25%, applied to the whole purchase price. It is due in cash at closing and cannot be financed.
Estimated mansion tax at asking
$32,375
Estimate based on the asking price. Confirm your own obligation with your real estate attorney.
Back to Search
Find more properties