Milton Coste

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(917) 416-7433

SOLD FOR $13,500,000

· Closed September 9, 2021

15 Union Square W #Penthouse
Looking for something similar?
Closed For Sale Condo

$13,500,000

$4,267 per sq ft

15 Union Square W #Penthouse

Flatiron, Manhattan

15USW

MLS® #RLS10614054

RLS at REBNY

Listing by The Corcoran Group

3

Bedrooms

4.5

Baths

3,164

Sq. Ft.

1900

Year Built

Quick Summary

Bedrooms 3
Bathrooms 4 full, 1 half
Living Area 3,164 sq ft
Year Built 1900
Ownership Condo
HOA/Common Charges $8,255.44/mo
Property Taxes $75,730.2/yr
Neighborhood Flatiron
Floor 12 of 12

Property Highlights

  • Views: City
  • Exposure: East,North,South,West facing
  • Outdoor Space: Terrace, Rooftop

Property Details

Type Condo
Ownership Condominium
Total Rooms 5
Baths 3 Full, 1 Half
Floor 12 of 12
View City
Exposure East,North,South,West
Cooling Central Air
Pets Yes
Cross Street Union Square West & East 15th Street
Year Built 1900
Living Area 3,164 sq ft
Architectural Style Prewar

Description

Reintroducing the ultimate in Penthouse living, this truly one-of-a-kind home features over 5,000 SF of extraordinary indoor and outdoor living spaces with incredible custom details and skyline views. Completely redesigned by D?Apostrophe, the 3 bedroom and 3.5 bath residence has expansive private outdoor space on both the upper and lower levels. Premium upgrades grace the ambience throughout, such as beautiful 6? white oak plank hardwood floors, custom espresso stained white oak paneling, and superior total home technology that affords a seamless luxury lifestyle. A private entrance awaits off the dual elevators, leading into a gracious gallery. Beyond is a wonderful open-concept great room with floor-to-ceiling windows flooding the space with natural light. The dramatic living and dining room with a gas-burning fireplace is a perfect backdrop for entertaining. Take the party outside to enjoy al fresco dining and cocktail parties on the lower level terrace with a built-in grill, modern dining pergola, and awe-inspiring vistas. Back inside, the chef is busily preparing delicacies in the sleek open kitchen, connected to the dining area by a large marble-topped island. This inspiring culinary setting is also adorned with rift-cut oak wood cabinetry, punctuated by top-of-the-line appliances by Viking, Sub-Zero and Miele. The main level also presents 2 bedrooms overlooking the park, complemented by en-suite baths with travertine marble floors, bleached oak vanities with Corian counter, and nickel-plated fixtures. The powder room is outfitted with a custom concrete sink and adjoins a separate laundry room with washer and dryer. The peaceful upper level, accessed by a floating staircase, is reserved for the serene primary bedroom suite, which opens onto a private rooftop terrace with an outdoor fireplace and hot tub for the ultimate relaxation. A windowed walk-in closet, and elegant en-suite bath with a wet room shower, 2 TVs with surround sound, a double-sink marble vanity, Toto toilet and heated floors enhance the pampered experience. At the touch of a finger, the home automation system, powered by Savant and monitored by OneButton, allows you control of all lighting, window shades, HVAC, TV, music and security. 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, onsite concierge services, spa with a 50? lap pool, oversized whirlpool, state-of-the-art fitness center with yoga studio and a recreation room. The premier location at Union Square Park is in the heart of it all, near incredible cafes and restaurants, and premier shopping. There is a 1% transfer fee to be paid by the purchaser.

Features & Amenities

Interior Features

Separate Formal Dining Room Entrance Foyer Building Washer Dryer Install Allowed Common Area

Exterior Features

Terrace Rooftop

Appliances

Dryer Washer

Building Information

Building 15USW
Total Units 36
Stories 12
Style Prewar

Financial Details

Common Charges $8,255.44/mo
RE Taxes $75,730.2/yr ($6,311/mo)
Original Price $15,750,000
Sale Price $13,500,000

The 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 Neighborhood

Active Listings

120

Median Asking Price

$2.27M

Median $/Sqft

$1,690

Avg Days on Market

N/A

New This Week

5

Price Reduced

31%

Sold (30 Days)

11

Median Sale Price

$2.80M

Live data from RLS at REBNY • Updated 3/25/26, 3:58 AM EST

Similar Listings in Flatiron

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Location

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15 Union Square W #Penthouse, Flatiron, New York County • Near Union Square West & East 15th Street

Floor Plans

Floor Plan
MLS® ID: RLS10614054
First Listed: 4/10/2019
Closed: 9/9/2021
Contract Date: 5/4/2019

Listing Courtesy of The 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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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 3/25/2026 at 7:58 AM UTC

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