Sold on 10/30/2025 for $4,025,000
15 UNION Square W #4E
MLS® #RLS20003706
Listing by Corcoran Group
3
Bedrooms
4.5
Baths
2,670
Sq. Ft.
1870
Year Built
Quick Summary
Property Highlights
- Views: City, Park Greenbelt
- Exposure: North,South facing
- Parking: Private garage
Property Details
Description
This exceptional designer home at 15 Union Square West offers the best of NYC living with dramatic ceiling heights, stunning arched windows, and complete serenity across two levels. Located in the heart of Downtown at the intersection between Greenwich Village, Gramercy Park, and Flatiron, Union Square Park provides a backyard setting with 6.5 acres of green space and a weekly farmer's market.
The bright, open great room is the heart of the residence, featuring soaring 17-foot double-height ceilings and iconic North-facing arched cast-iron window frames from the original Tiffany's building, now set behind a sleek glass facade. The expansive space accommodates oversized furniture, a 10-seat dining table, and a built-in dry bar with lit glassware cabinetry, making it perfect for living and entertaining.
The kitchen seamlessly connects to the living area, sharing the same North-facing views and abundant natural light. It boasts an elongated Calacatta marble island, top-tier stainless steel appliances-including a Viking six-burner gas range, Sub-Zero refrigerator, and wine cooler-and sleek white cabinetry complemented by a stainless steel backsplash and contemporary lighting.
A stainless steel and glass staircase leads to the private master suite, a spacious oasis with southern exposures, two oversized windows, two expansive closets, and room for additional furniture or a workstation. The en-suite bathroom features custom-designed finishes by Vicente Wolf, a double sink vanity, a wet room with dual shower heads, and a claw-foot soaking tub.
The lower level offers two generous secondary bedrooms with en-suite bathrooms, custom closets, and southern exposures. A mahogany-paneled powder room on the main level conceals a laundry closet with a full-sized Miele washer and dryer. Additional storage includes a foyer closet and linen closets on the upper level. Other highlights include mahogany flooring, central HVAC, and an integrated Crestron system for shading, lighting, and climate control.
A conversion of Tiffany & Company's 19th century headquarters, 15 Union Square West is a coveted high-end boutique condominium with hotel-like amenities including a 24-hour doorman, on-site concierge services, a zen spa with a 50' lap pool, oversized whirlpool, state-of-the-art fitness center with yoga studio and a recreation room. The premier location is in the heart of it all, near incredible cafes and restaurants, and the best of Fifth Avenue shopping.
This is a co-listing with Compass/Corcoran. Please contact us to schedule a viewing.
Features & Amenities
Interior Features
Exterior Features
Building Amenities
Appliances
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
102
Median Asking Price
$2.73M
Median $/Sqft
$1,790
Avg Days on Market
N/A
New This Week
8
Price Reduced
30%
Sold (30 Days)
6
Median Sale Price
$3.05M
Live data from RLS at REBNY • Updated 2/22/26, 5:26 PM EST
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Location
15 UNION Square W #4E, Flatiron, New York County
Listing Data
RLS® at REBNY (Real Estate Board of New York) via Trestle API. Updated in real-time.
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.
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Listing Courtesy of Corcoran Group - Dana Power
Listing Contact: (917) 209-4550
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 2/22/2026 at 10:26 PM UTC