Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433

SOLD FOR $9,150,000

· Closed November 8, 2019

21 E 90TH Street #PHD
Closed For Sale Co-op

$9,150,000

21 E 90TH Street #PHD

Upper East Side, Manhattan

null

MLS® #RLS10569393

RLS at REBNY

Listing by Brown Harris Stevens Residential Sales LLC

4

Bedrooms

4.5

Baths

N/A

Sq. Ft.

1927

Year Built

Quick Summary

Bedrooms 4
Bathrooms 5 full, 1 half
Year Built 1927
Ownership Co-op
Maintenance $9,858/mo
Neighborhood Upper East Side
Floor 14 of 14

Property Highlights

  • Exposure: East,North,West facing
  • Outdoor Space: Terrace
  • Style: Prewar architecture

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 8
Baths 4 Full, 1 Half
Floor 14 of 14
Exposure East,North,West
Pets Yes
Cross Street Fifth and Mad
Year Built 1927
Architectural Style Prewar
Parcel # 1502-0017-00021-000-0000PHD

Listing History

Event Date Price Change
Listed Sep 20, 2018 $12,500,000 -
Currently Apr 26, 2026 $9,150,000 -26.8%

Description

Spectacular wrap-around terraced penthouse with wide-open, unobstructed Central Park and reservoir views located in the very heart of the charming Upper East Side neighborhood, Carnegie Hill. This special apartment is on top of a handsome elegant pre-war NYC building - this "garden in the sky" features a private elevator landing that opens to a 25' living room with 9'8" ceilings - with knock out views of the ever-changing park, the mercurial water in the vast 105 acre Jackie Onassis Reservoir, and the dynamic cityscape beyond. You can open the terrace doors and windows and let in the fresh air, when it is winter - warm up next to the wood-burning fireplace and watch the snowflakes swirl and fall. The view at night is full of wonder - the night lights are like a pearl necklace gracefully outlining the contours of the Onassis reservoir walking path. You will have a front-and-center seat observing the night-fall all around this lovely penthouse - magnificent sunsets, the ever-changing path of the moon, the reflection of the twinkling lights upon the reservoir water.There are two wonderful terraces - one facing West towards Central Park, the other terrace facing East, bridged by the terrace walkway facing North. Multiple seating arrangements make these terraces perfect for glamorous entertaining and lovely, everyday outdoor living. Begin your day with the sun-rise in one of the three intimate planted terraces facing the East.The Penthouse floor features the West facing terrace, the spacious living room, 2-3 bedrooms, 3.5 bathrooms. An extra room, currently the Music Room (with terrace access) flows into yet another room - currently used as a sleeping/afternoon nap room. These two rooms can be used as a separate suite - a guest room, office or maid's room, with its own bathroom. The lower level has lovely Central Park views from all of the rooms - the private Master bedroom suite is serene and quiet - the walk-in closet could be used as a nursery; the smart wood paneled library has yet another wood-burning fireplace. Just off the formal dining room there is a welcoming windowed eat-in kitchen. Other details include central air, elevator access on both levels, a washer/dryer, steam shower, beautiful hardwood floors and an abundance of bookshelves and built-in storage.Built in 1927 by notable New York architect, George F. Pelham, 21 East 90th Street is a full-service building, on one of the prettiest streets in all of Manhattan. This historic block was selected by Andrew Carnegie because it is the high point of what is now known as Carnegie Hill. In 1898 Andrew Carnegie purchased the land, in 1902 he built his mansion. Carnegie's home and grassy gated garden were converted into a National Historic Landmark in 1966, the building is now the Cooper-Hewitt Museum a part of the Smithsonian Institution. Less than a block from your door-step, you will pass along the Carnegie garden - cross fashionable Fifth Avenue and find yourself at the majestic Engineers' Gate entrance which opens right into Central Park - enjoy strolling along the Onassis Reservoir, jogging, bike riding all through Central Park.Carnegie Hill is a beautiful neighborhood, marked by trees, charming shops and restaurants, and cultural institutions that include the Guggenheim Museum, the 92nd Street Y - the magnificent neo-Gothic Church of the Heavenly Rest across the street from the Carnegie mansion - the venerated Metropolitan Museum of Art is just a hop skip and jump down leafy Fifth Avenue. The Fifth Avenue bus stops right at 90th Street, the subway stops at Lexington at 86th and 96th Street. Welcome to the Penthouse at 21 East 90th Street, and to this lovely neighborhood!

Features & Amenities

Interior Features

Building Washer Dryer Install Allowed

Exterior Features

Terrace

Appliances

Dryer Washer Dryer Allowed Washer

Building Information

Building null
Building Data View Compliance & Permits
Total Units 48
Stories 14
Style Prewar

Financial Details

Maintenance $9,858/mo
Original Price $12,500,000
Sale Price $9,150,000

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

339

Median Asking Price

$1.57M

Median $/Sqft

$1,563

Avg Days on Market

N/A

New This Week

27

Price Reduced

27%

Sold (30 Days)

32

Median Sale Price

$1.52M

Live data from RLS at REBNY • Updated 4/26/26, 5:55 AM EST

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Location

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21 E 90TH Street #PHD, Upper East Side, New York County • Near Fifth and Mad

Floor Plans

Floor Plan

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 $9,858 per month. Confirm the exact amount with the listing broker before making an offer.

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 [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) 416-7433
MLS® ID: RLS10569393
First Listed: 9/20/2018
Closed: 11/8/2019
Contract Date: 9/19/2018

Listing Courtesy of Brown Harris Stevens Residential Sales LLC - Wendy Sarasohn

Listing Contact: (212) 906-9366

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 4/26/2026 at 9:55 AM UTC

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