Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433

SOLD FOR $6,195,000

· Closed December 15, 2023

21 E 90th Street #14AB
Closed For Sale Co-op

$6,195,000

21 E 90th Street #14AB

Upper East Side, Manhattan

MLS® #RLS10930380

RLS at REBNY

Listing by Compass

4

Bedrooms

4.5

Baths

N/A

Sq. Ft.

1927

Year Built

Quick Summary

Bedrooms 4
Bathrooms 4 full, 1 half
Year Built 1927
Ownership Co-op
Maintenance $10,978/mo
Neighborhood Upper East Side
Floor 14 of 14

Property Highlights

  • Character: Pre-war building (1927)

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 9
Baths 4 Full, 1 Half
Floor 14 of 14
Pets Yes, CatsOk, DogsOk
Year Built 1927
Structure Type MultiFamily
Furnished Unfurnished
Parcel # 1502-0017-00021-000-00014AB
Block/Lot 01502/0017

Listing History

Event Date Price Change
Listed Sep 15, 2023 $6,195,000 -
Currently Apr 28, 2026 $6,195,000 -

Description

Light filled with captivating views in four directions, including glorious vistas of the Jacqueline Kennedy Onassis Reservoir, this high floor prewar residence is simply perfect and understatedly grand. Step directly from the elevator into an expansive home of more than 3,500 square feet, stretching to the west for the entertaining space and east for the bedrooms. Comprising nine beautifully proportioned and fully renovated rooms—plus a terrace that may be accessed from two of the four bedrooms, Unit 14AB has been a 9-room residence at least since the Offering Plan was filed on 3/15/1977, if not from the time it was built in 1927. Enjoy superb sunsets from two corner fireside entertaining rooms: an oversized 31’8” Living Room and a nearly square adjacent Great Room that spills into an open fully equipped cook’s kitchen featuring limestone counters, Viking Professional range with center griddle and hood, Subzero, wine cooler, Bosch dishwasher, 28” wide sink, and a mix of closed and glass fronted cabinets. New tilt and turn windows on the west have been expanded with landmarks approval to maximize the spectacular picture postcard views. There are four bedrooms, each with ensuite bathrooms. Access the corner terrace from a luxurious Primary Bedroom suite for a morning coffee to watch the sunrise. An adjoining Primary Bath clad in calacatta gold marble features double sink, deep soaking tub and separate shower. Three additional bedrooms also have renovated ensuite baths. An elegant powder room with calacatta gold marble sink services guests. A smartly designed windowed office with 2 built-in desks provides ample work from home options. A separate laundry room/ auxiliary catering kitchen with induction stove serves a variety of needs. A combination of CAC, thru-wall HVAC and Mitsubishi split system cools the home. Three fireplaces, beautiful custom millwork, stone covered window sills, French doors, new quarter and rift sawn white oak floors and new iron terrace doors complete the picture. There is abundant storage within the home, and additionally two individual storage cages transfer with the sale. Located in the heart of Carnegie Hill on one of its prettiest streets, a block away from Central Park’s impressive Engineer’s Gate, this highly sought-after, well-established white glove co-op is close to some of the city’s most important museums, cultural centers and Madison Avenue shopping and dining options. The Cooper Hewitt Museum and garden up the street has a café and outdoor seating. Several prominent private schools and PS 6 are within walking distance. A Resident Manager runs the building, supervising an attentive and very caring staff. Pieds-à-terre and pets are permitted, and the building has a bike storage room and central laundry. A 2% transfer fee is payable by the buyer. A $5,448 monthly assessment runs through 2023.

Features & Amenities

Interior Features

Building Washer Dryer Install Allowed Common On Floor Common Area

Building Information

Building Data View Compliance & Permits
Total Units 50
Stories 14
Structure MultiFamily

Financial Details

Maintenance $10,978/mo
Sale Price $6,195,000

The Upper East Side remains the gold standard for classic New York elegance. Known for 'Museum Mile' and its low-traffic, tree-lined streets, the neighborhood offers a refined lifestyle away from the midtown bustle. While famous for its historic cooperatives, the area has seen a recent surge in ultra-luxury new construction condos, particularly along the Second Avenue Subway corridor, making it a top choice for both traditionalists and modern buyers.

Upper East Side Live Market Data

View Neighborhood

Active Listings

345

Median Asking Price

$1.57M

Median $/Sqft

$1,547

Avg Days on Market

N/A

New This Week

29

Price Reduced

29%

Sold (30 Days)

36

Median Sale Price

$1.52M

Live data from RLS at REBNY • Updated 4/28/26, 4:56 PM EST

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Location

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21 E 90th Street #14AB, Upper East Side, New York County

Floor Plans

Floor Plan 1

Building Information

Official NYC property records for this building

2013
Year Built
13 years old
4
Floors
4
Residential Units
R6B
Zoning District
Primarily Residential Mixed Use

Tax & Assessment

Assessed Value: $447,750
Land Value: $56,700
Exemptions: $0

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

Lot Area: 1,263 SF
Building Area: 4,670 SF
Built FAR: 3.7
Allowed FAR: 2

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 $10,978 per month. Confirm the exact amount with the listing broker 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 4 bedrooms and 4 full bathrooms and 1 half bathroom.

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 the listing broker for weight limits or breed restrictions.

To schedule a private showing, contact Milton Coste at (917) 416-7433 or mcoste@kwnyc.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: RLS10930380
First Listed: 10/26/2023
On Market: 9/15/2023
Closed: 12/15/2023
Contract Date: 9/11/2023

Listing Courtesy of Compass - Shirley Hackel

Listing Contact: (914) 980-0371

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 4/28/2026 at 8:56 PM UTC

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