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25 East 21st Street
Apartment #DUPLEX23
$8,800,000 Price
7 Bedrooms   8.5 Baths
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25 East 21st Street, Flatiron, NYC

The combination of the 2nd and 3rd floors to create a sprawling 7,000 sq. ft. duplex—one of the largest Flatiron condo lofts available. Each floor boasts an expansive open layout measuring over 40 feet wide and 82 feet deep, with soaring ceilings ranging from 12.5 to 13.5...

The combination of the 2nd and 3rd floors to create a sprawling 7,000 sq. ft. duplex—one of the largest Flatiron condo lofts available. Each floor boasts an expansive open layout measuring over 40 feet wide and 82 feet deep, with soaring ceilings ranging from 12.5 to 13.5 feet. This extraordinary space offers the opportunity to design a duplex of epic proportions. Imagine crafting a spacious 7-bedroom home with 7-8 bathrooms, generous entertaining areas, a media room, library, home office, gym, spa, ample storage, staff rooms, and more. The south-facing, oversized windows flood the space with brilliant natural light throughout the day. The current floor plans (both floors feature identical layouts) showcase a versatile blank canvas, and a proposed 7-bedroom configuration is also available for inspiration. With only two small columns on each floor, the possibilities for customization are virtually limitless. This exclusive boutique condo building comprises just 11 full-floor residences and features a doorman for added convenience. The seamless conversion from commercial to residential use provides the freedom to develop your vision. Nestled on a peaceful, picturesque block in the heart of Flatiron, this offering is a rare gem—a unique opportunity to craft an exceptional living space tailored to your style and imagination.

Courtesy of Compass

Floorplan for 25 East 21st Street, DUPLEX23

Floorplan for 25 East 21st Street, DUPLEX23

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* All information furnished regarding property for sale, rental, financing or estimated mortgage rates is from sources deemed reliable but no warranty or representation is made as to the accuracy thereof. For further financing information, please contact a Brown Harris Stevens agent.

Listing Details

New Listing
Flatiron, NYC
Type: Condominium
Price: $8,800,000
Maintenance/CC: $7,362
Monthly real estate tax: $69,096
Date Listed: 1/14/2025
Web ID: 1102824460

Info & Amenities

Type: Condominium
Rooms: 16.0
Bedrooms: 7
Full Bathrooms: 8
Half Bathrooms: 1.0

Map of Area for 25 East 21st Street DUPLEX23

Get to Know Flatiron

The Flatiron District is a vibrant and bustling neighborhood located in the heart of Manhattan, named after the iconic Flatiron Building, a triangular-shaped landmark that stands at the intersection of Fifth Avenue and Broadway. This neighborhood offers a mix of commercial and residential spaces, attracting both residents and visitors alike with its unique charm.

More About Flatiron

Neighborhood Guide to Flatiron

This information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. ©2025 The Real Estate Board of New York, Inc., All rights reserved.

All information is from sources deemed reliable but is subject to errors, omissions, changes in price, prior sale or withdrawal without notice. No representation is made as to the accuracy of any description. All measurements and square footages are approximate and all descriptive information should be confirmed by customer. All rights to content, photographs and graphics are reserved to Brown Harris Stevens. Customer should consult with its counsel regarding all closing and tax costs. Broker represents the seller/owner on Broker's own exclusives, except if another agent of Broker represents the buyer/tenant, in which case Broker will be a dual agent, in Connecticut, or , in New York State and New Jersey, a dual agent with designated or disclosed agents representing seller/owner and buyer/tenant. Broker represents the buyer/tenant when showing the exclusives of other real estate firms. In Florida, Broker acts as a Transaction Broker with all sellers and buyers, unless a different form of agency has been established in writing. If you are looking to purchase or rent housing, are using a screen reader, and are having problems using this website, please call 1-212-712-1163 for assistance. All phone charges will be reimbursed by Brown Harris Stevens. Broker actively supports Fair Housing and Equal Housing Opportunities. BHS has adopted the attached policy statement - Prior to showing a homebuyer a property or providing services: (1) BHS does not require identification from a prospective homebuyer, (2) BHS may require a written agreement from a homebuyer before showing properties; and (3) BHS does not require a pre-approval for a mortgage loan in order to show a homebuyer properties. However, based upon the requirements of the seller, the building in which the properties is located, or others, some or all of the foregoing items may be required. 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. 2025 The Real Estate Board of New York, Inc., all rights reserved. RLS Data display by Brown Harris Stevens. Powered by Terra Holdings.