Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433

SOLD FOR $2,550,000

· Closed September 24, 2021

15 Union Square W #5-C
Closed For Sale Condo

$2,550,000

$2,019 per sq ft

15 Union Square W #5-C

Flatiron, Manhattan

MLS® #RLS10666451

RLS at REBNY

Listing by Compass

1

Bedroom

1.5

Baths

1,263

Sq. Ft.

1870

Year Built

Quick Summary

Bedrooms 1
Bathrooms 2 full, 1 half
Living Area 1,263 sq ft
Year Built 1870
Ownership Condo
HOA/Common Charges $2,872/mo
Property Taxes $26,820/yr
Neighborhood Flatiron
Floor 5 of 12

Property Highlights

  • Views: City
  • Exposure: East,North facing
  • Style: Prewar architecture

Property Details

Type Condo
Ownership Condominium
Total Rooms 3
Baths 1 Full, 1 Half
Floor 5 of 12
View City
Exposure East,North
Cooling Central Air
Pets Yes
Cross Street East 14th Street/East 15th Street
Year Built 1870
Living Area 1,263 sq ft
Architectural Style Prewar
Block/Lot 842/7502

Listing History

Event Date Price Change
Listed May 10, 2010 $2,550,000 -
Price Reduced Oct 18, 2021 $2,700,000 +5.9%

Description

This gorgeous one of a kind simplex one bedroom, 1.5 bathroom home was recently renovated by award winning designer Robert Passal. It reflects classic charm and modern elegance throughout its 1,263 sq ft of meticulously-designed living space with 14' ceilings throughout. Upon arrival you'll be awe-inspired by the magnificent artful elements gracing the ambiance, the highlight of which are striking original cast iron arches of the 1870 Tiffany & Company. Dark, rich wood flooring enhances the character and is all new, with new subflooring and soundproofing to ensure peace and quiet.


The gracious entry foyer spills into dramatic living/dining/entertaining space brightened by a wall of floor-to-ceiling arched windows with grand architecture views. Completing the great room is a showstopper open kitchen tailored to the chef, with custom cabinetry, a large stainless steel island with refinished and honed marble top, mahogany legs, sink & counter seating, plus top-of-the-line built-in appliances & wine fridge. The wow-factor continues in the master bedroom with its own wall of massive arched windows inviting in generous light. Furthering the luxury experience is a newly French-polished built-in desk & entertainment center, new wall covering, substantial walk-in dressing closet, and magnificent en-suite spa bath clad in grey/green granite. Here you can refresh & pamper yourself in the unique wet room behind glass featuring a freestanding soaking tub and shower with dual heads. Heightening the allure is a double-sink vanity with Pietra Bedonia sandstone top, translucent glass sinks & shagreen-covered cabinetry.


An impeccable modern conversion of Tiffany & Company's 19th century headquarters, 15 Union Square West is a high-end boutique condominium with 36 residences and amenities spaces custom designed by the renowned Vincent Wolf. Residents are treated to such hotel-style amenities as 24-hour doorman service, concierge, valet parking, Zen spa with 50' lap pool, oversized whirlpool, and state-of-the-art fitness center with yoga studio & boxing room. The supreme location at Union Square Park is at the heart of the vibrant neighborhood's shops, cafes, restaurants, subways and conveniences. Deeded storage is available for purchase.


1% Transfer Fee paid by Purchaser.

Features & Amenities

Interior Features

Entrance Foyer Building Washer Dryer Install Allowed

Appliances

Dryer Washer

Building Information

Financial Details

Common Charges $2,872/mo
RE Taxes $26,820/yr ($2,235/mo)
Sale Price $2,550,000
Previous Price $2,700,000

The 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 Neighborhood

Active Listings

139

Median Asking Price

$2.42M

Median $/Sqft

$1,788

Avg Days on Market

N/A

New This Week

12

Price Reduced

32%

Sold (30 Days)

4

Median Sale Price

$1.55M

Live data from RLS at REBNY • Updated 5/18/26, 3:06 PM EST

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Location

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15 Union Square W #5-C, Flatiron, New York County • Near East 14th Street/East 15th Street

Floor Plans

Floor Plan 1

Building Information

Official NYC property records for this building

1900
Year Built
126 years old
12
Floors
34
Residential Units
C6-4
Zoning District
Condominiums

Tax & Assessment

Assessed Value: $28,606,533
Land Value: $2,250,008
Exemptions: $0

Note: Individual unit taxes may differ. Verify current tax bills with NYC DOF.

Lot Area: 12,915 SF
Building Area: 89,289 SF
Built FAR: 6.91
Allowed FAR: 10

Source: NYC PLUTO (Primary Land Use Tax Lot Output), NYC Department of City Planning (data.cityofnewyork.us)

Want help estimating ownership costs or understanding building compliance? Let's discuss

Frequently Asked Questions

Common questions about this property

The current listed common charges are $2,872 per month. Confirm the exact amount with the listing broker before making an offer.

The current listed annual property tax is $26,820, or roughly $2,235 per month. Verify the current assessment with your attorney before closing.

This property has 1 bedroom and 1 full bathroom and 1 half bathroom.

The listed interior living area is 1,263 square feet. Verify dimensions independently during due diligence.

According to MLS records, the building was constructed in 1870, making it approximately 156 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 $2,550,000 for 1,263 sq ft, the asking price per square foot is approximately $2,019. 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) 416-7433
MLS® ID: RLS10666451
First Listed: 5/10/2010
Price Changed: 10/18/2021
Closed: 9/24/2021
Contract Date: 9/11/2020

Listing Courtesy of Compass - Stephen Ferrara

Listing Contact: (646) 761-7038

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 at REBNY

RLS Data display by Keller Williams NYC. Data last updated on 5/18/2026 at 7:06 PM UTC

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