SOLD FOR $4,025,000
· Closed October 30, 2025
15 Union Square W #4E
MLS® #RLS20003786
Listing by Compass
3
Bedrooms
3.5
Baths
2,670
Sq. Ft.
1900
Year Built
Quick Summary
Property Highlights
- Exposure: South facing
- Climate Control: Central Air
- Character: Pre-war building (1900)
Property Details
Listing History
| Event | Date | Price | Change |
|---|---|---|---|
| Listed | Feb 18, 2025 | $4,250,000 | - |
| Currently | May 9, 2026 | $4,025,000 | -5.3% |
Description
This exceptional designer residence 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. 18 square feet of on-site private resident storage included. 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. Please contact us to schedule a viewing.
Features & Amenities
Interior Features
Building Amenities
Appliances
Building Information
Financial Details
About Flatiron
View All Flatiron ListingsThe Flatiron District is a busy 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
134
Median Asking Price
$2.25M
Median $/Sqft
$1,761
Avg Days on Market
N/A
New This Week
14
Price Reduced
31%
Sold (30 Days)
11
Median Sale Price
$2.16M
Live data from RLS at REBNY • Updated 5/9/26, 9:39 AM EST
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Location
15 Union Square W #4E, Flatiron, New York County
Virtual Tour
Floor Plans
Building Information
Official NYC property records for this building
Tax & Assessment
Note: Individual unit taxes may differ. Verify current tax bills with NYC DOF.
Source: NYC PLUTO (Primary Land Use Tax Lot Output), NYC Department of City Planning (data.cityofnewyork.us)
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Listing Data
RLS® at REBNY (Real Estate Board of New York) via Trestle API. Updated in real-time.
Building Data
NYC PLUTO (Primary Land Use Tax Lot Output), NYC Department of City Planning. Updated quarterly.
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.
All data is provided for informational purposes only and should be independently verified. See our Data Sources Policy for more information.
Frequently Asked Questions
Common questions about this property
The current listed common charges are $7,400 per month. Confirm the exact amount with the listing broker before making an offer.
The current listed annual property tax is $61,644, or roughly $5,137 per month. Verify the current assessment with your attorney before closing.
This property has 3 bedrooms and 3 full bathrooms and 1 half bathroom.
The listed interior living area is 2,670 square feet. Verify dimensions independently during due diligence.
According to MLS records, the building was constructed in 1900, making it approximately 126 years old.
This listing is a condominium. Buyers receive a deed to their individual unit and own their space outright, subject to condo association rules.
Pets are permitted at this property. Contact the listing broker for weight limits or breed restrictions.
At the current list price of $4,025,000 for 2,670 sq ft, the asking price per square foot is approximately $1,507. This figure is for reference only and may differ from appraised or assessed values.
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) 416-7433Listing Courtesy of Compass - Heather L Domi
Listing Contact: (917) 566-6644
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 Data display by Keller Williams NYC. Data last updated on 5/9/2026 at 1:39 PM UTC