Closed For Sale • Condo

$4,800,000

$1,489 per sq ft

15 W 20TH Street #PH

Flatiron, Manhattan

MLS® #RLS10819655

Listing by CORE Group Marketing, LLC

3

Bedrooms

4.5

Baths

3,223

Sq. Ft.

1905

Year Built

Quick Summary

Bedrooms 3

Bathrooms 4 full, 1 half

Living Area 3,223 sq ft

Lot Size 5,152 sq ft

Year Built 1905

Ownership Condo

HOA/Common Charges $2,918/mo

Property Taxes $51,168/yr

Neighborhood Flatiron

Floor 10 of 11

Property Highlights

• Views: City
• Exposure: North,South facing
• Outdoor Space: Building Terrace, Terrace, Balcony

Property Details

Type Condo

Ownership Condominium

Total Rooms 6

Baths 3 Full, 1 Half

Floor 10 of 11

View City

Exposure North,South

Cooling Central Air

Pets Yes

Year Built 1905

Living Area 3,223 sq ft

Architectural Style Prewar

Lot Size 5,152 sq ft

Description

This Flatiron residence was distinctly designed for the discerning buyer who seeks privacy from the rush of the city and ample outdoor space. Perched atop a boutique condominium off Fifth Avenue, this luxury penthouse duplex offers the ultimate indoor/outdoor living with nearly 2,000 square feet of private terraces. Currently configured as a 2-bedroom with a library, the floor plan allows for the home to be easily be converted back to a true 3-bedroom with 3.5-bathrooms. The expansive master suite is situated on the second floor, and features a six-fixture bathroom with a large soak-in tub, a dressing room, a separate office, coffered ceilings and a walk-in closet. Surrounded by large windows that offer three exposures, the sun-flooded home has been carefully appointed with the finest materials including a wood-burning fireplace cased in imported marble, a built-in audio system, radiant heated floors in the bathrooms, a separate laundry room and central air conditioning. The private landscaped terraces, which can be viewed from most rooms within the home, are the perfect oasis for entertaining or for a quiet evening, complete with a hot tub and grill. The Altair 20 offers an attended lobby, an integrated visual intercom system, a fitness center and additional storage units.

Features & Amenities

Interior Features

Den Separate Formal Dining Room Fireplace

Exterior Features

Balcony Building Roof Deck Building Terrace Terrace Balcony

Appliances

Dryer Washer Dryer Allowed Washer

Building Information

Total Units 17

Stories 11

Style Prewar

Financial Details

Common Charges $2,918/mo

RE Taxes $51,168/yr ($4,264/mo)

Original Price $5,500,000

Sale Price $4,800,000

About Flatiron

View All Flatiron Listings

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

121

Median Asking Price

$2.29M

Median $/Sqft

$1,678

Avg Days on Market

N/A

New This Week

6

Price Reduced

31%

Sold (30 Days)

11

Median Sale Price

$2.80M

Live data from RLS at REBNY • Updated 3/25/26, 3:44 PM EST

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Location

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15 W 20TH Street #PH, Flatiron, New York County

NYC Zoning • Google Maps • Street View

Floor Plans

Data Sources & Methodology

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.

All data is provided for informational purposes only and should be independently verified. See our Data Sources Policy for more information.

MLS® ID: RLS10819655

First Listed: 4/2/2018

Closed: 8/29/2018

Contract Date: 4/3/2018

Listing Courtesy of CORE Group Marketing, LLC - Adrian Noriega

Listing Contact: (646) 279-6104

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 3/25/2026 at 7:44 PM UTC