Altair 20, 15 West 20th Street, NYC - Condo Apartments

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Altair 20,
15 West 20th Street

condo located in Flatiron/Union Square, between Fifth Avenue & Sixth Avenue

Recent Sales (2) $1,333 Avg. price/ft²
All Units in Building (19)

Apt. 9A

2 beds

2 baths

2,259 ft²

$3,200,000 -7.2%

$1,417

$3,450,000

Nov 25, 2025

Apt. 3B

2 beds

3 baths

2,322 ft²

$2,900,000 -10.8%

$1,249

$3,250,000

Mar 22, 2022

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Overview of Altair 20 at 15 West 20th Street

Altair 20 is a boutique condominium in the bones of a Neo-Renaissance store-and-loft building in the Ladies Mile Historic District. A part-time doorman and live-in superintendent are on staff, and amenities include a La Palestra fitness center, storage, and a landscaped roof deck with cabanas and grills. Pets are welcome.

Altair 20 is located at 15 West 20th Street near Eataly, Trader Joe's, Madison Square Park, Union Square Park, and acclaimed restaurants like Eleven Madison Park. It is in the heart of the Flatiron District near NoMad, Chelsea, Union Square, and Gramercy. The N/R/W, F/M, 6, 1, and PATH trains are close by.

Year Built

1906

Converted: 2006

Apartments

Floors

Pets: Allowed

Neighborhood

Flatiron/Union Square (Manhattan)

Min Down

20%

19Apartments

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Sales & Rentals
in Building

Amenities

Pre War
Central AC
Intercom
Rooftop Terrace
Elevator
Outdoor Entertainment Space
In-Unit Washer/Dryer
Fireplaces
Landmarked
Terraces / Balconies

Area Map StreetView

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Nearby Subways

at Broadway 0.15 miles

at 6th Ave 0.18 miles

at 6th Ave and 16th 0.26 miles

at Park Ave 0.29 miles

at Broadway and 16th 0.33 miles

at 8th Ave and 25th 0.50 miles

Pros & Cons

Sidewalk landscaping
Good location in Flatiron District
Storage
Live-in superintendent
Permits pets
Part-time doorman
Roof deck with cabanas and grill
Close to Subway

No balconies
No swimming pool
No concierge

CityRealty Rating

/44

Architecture

/36

Location

/39

Features

Editor’s Points

CITYREALTY
RATING

How is the CityRealty Rating calculated?
Architecture

30+ remarkable

20-29 distinguished

11-19 average

< 11 below average
Location

27+ remarkable

18-26 distinguished

9-17 average

< 9 below average
Features

22+ remarkable

16-21 distinguished

9-15 average

< 9 below average
CityRealty’s Ratings Explained

Broker & Buyer Comments

Add Your Own Comment

This "boutique" prewar-turned-condo offers "exclusive privacy" with "just two residences per floor." The "tranquil" atmosphere begins in the "artfully designed" lobby, while the "spa-like" La Palestra fitness center and "harmoniously landscaped" roof deck with cabanas provide "resort-style" amenities. Located in the "hip" Flatiron district, it's "steps from" Madison Square Park and "world-class dining." The "prime" location off Fifth Avenue puts residents within "easy reach" of multiple subway lines and "coveted" shopping destinations like Eataly and Trader Joe's.

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Pricing Comparison of Similar Buildings

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Editorial Coverage

Alternate Address

13 West 20th Street

50 West 66th Street

between Central Park West & Columbus Avenue

Central Park West

The pinnacle of Upper West Side living. Exceptional condo residences with Central Park views and 50,000 SF of amenities. Early 2025 occupancy | 50% Sold

2 beds starting at $5,995,000
3 beds starting at $7,100,000
4 beds starting at $8,500,000
5 beds starting at $22,500,000
6+ beds starting at $85,000,000

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All information furnished regarding property for sale, rental or financing is from sources deemed reliable, but no warranty or representation is made as to the accuracy thereof and same is submitted subject to errors, omissions, change of price, rental or other conditions, prior sale, lease or financing or withdrawal without notice. All dimensions are approximate. For exact dimensions, you must hire your own architect or engineer and for no listing shall the number of bedrooms listed be considered a legal conclusion.

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An equal housing opportunity

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Altair 20,15 West 20th Street

condo located in Flatiron/Union Square, between Fifth Avenue & Sixth Avenue

Overview of Altair 20 at 15 West 20th Street

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Altair 20,
15 West 20th Street

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