24 E 21st Street #PH
MLS® #RLS20070048
Listing by Compass
4
Bedrooms
5.5
Baths
4,109
Sq. Ft.
1935
Year Built
Quick Summary
Property Highlights
- Exposure: North,South,West facing
- Outdoor Space: Terrace, Rooftop
- Fireplace: 1 fireplace
Property Details
Description
850+ SQFT PRIVATE TERRACE Welcome to the Penthouse at 24 East 21st Street, a private oasis with 4 Beds and 4.5 Baths in prime Flatiron. Stepping off the keyed elevator you are immediately greeted by the expanse of the 18+ foot ceiling, sunny skylights and endless living space. The floor-through, 40 foot long, great room provides a grand setting for both relaxing and entertaining, enhanced by sunny southern and northern views. The newly renovated, eat-in, kitchen is a chef's dream, featuring quartz countertops, Bilotta cabinetry, and top of the line appliances including a Sub Zero refrigerator, Viking range, and two dishwashers - a space that is as functional as it is beautiful. Ascend up the glass encased stairs to enter the large private terrace above. With over 850 sqft, beautifully landscaped, and a three season cabana, this terrace is the perfect private getaway and excellent for entertaining. A breathtaking glass enclosed gallery leads to the private wing, anchored by an expansive media and family lounge with a full bar - an exceptional bonus space ideal for entertaining, work, or relaxation. The south-facing primary suite is a serene retreat featuring dramatic ceiling height, electric shades, large walk-in closet, and a luxurious marble bath with double vanity, soaking tub, and separate shower. Two additional generously proportioned bedrooms offer custom closets, with one en-suite bath and a separate full bathroom off the gallery that also houses a Miele washer and dryer. On either side of the entry foyer there is a powder room for entertaining guests and an additional staff room outfitted for storage with a wine fridge and an en-suite bath. Other features of this apartment are central AC with three zones, hardwood flooring throughout, gas fireplace and a juliet balcony. Located just off Park Avenue South, 24 East 21st Street sits at the crossroads of Flatiron, Gramercy, and NoMad - surrounded by acclaimed restaurants, Madison Square Park, premier fitness studios, and convenient transportation. The building consists of eight full floor residences with two private keyed elevators. There are also keyed storage lockers in the lobby. This penthouse presents a rare opportunity to own a truly special residence in one of Manhattan’s most vibrant and enduring neighborhoods.
Features & Amenities
Interior Features
Exterior Features
Building Amenities
Building Information
Financial Details
About Flatiron
View All Flatiron ListingsThe Flatiron District is a vibrant intersection of history, technology, and luxury living. Named after the iconic Flatiron Building, the neighborhood is centered around Madison Square Park and is a hub for the city's 'Silicon Alley.' The real estate market is famous for its grand cast-iron loft buildings with high ceilings and expansive floor plans, alongside ultra-luxury glass towers that offer modern amenities and central Manhattan convenience.
Flatiron Live Market Data
View NeighborhoodActive Listings
112
Median Asking Price
$2.73M
Median $/Sqft
$1,790
Avg Days on Market
N/A
New This Week
11
Price Reduced
29%
Sold (30 Days)
6
Median Sale Price
$2.95M
Live data from RLS at REBNY • Updated 3/2/26, 11:07 AM EST
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Location
24 E 21st Street #PH, Flatiron, New York County
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Listing Data
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Market Data
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Listing Courtesy of Compass - Elizabeth W Sahlman
Listing Contact: (917) 523-8200
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.
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RLS Data display by Keller Williams NYC. Data last updated on 3/2/2026 at 4:07 PM UTC