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Altair 20

15 West 20th Street, New York, NY 10011

17 units

11 stories

1906 built

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Mark Fromm

Licensed Associate Real Estate Broker

Douglas Elliman

55

NYC Condo sales in the last 10 years

10

years selling in Flatiron

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About

Originally built in 1906, 15 West 20th Street underwent a full-scale luxury redevelopment by Extell Development. Reimagined as the Altair condo, this boutique building has only seventeen apartments. The building offers the privacy and scale of a classic pre-war structure, with the infrastructure and finishes of a modern high-end residence thanks to Extell’s touch. The result is a rare blend of character and quality in one of Manhattan’s most desirable neighborhoods.

Facts

Development status: Completed
Developer: Extell Development
District: Community District 105City Council District 3Police Precinct 13
Building class: RR
Documents and permits: View documents and permits

Available units

No units available. Check back soon.

Unavailable sales

			Status				Floor plan
11/29/25	#9A	$3,200,000	Sold (asking: $3,450,000; -7.25%)	2 beds	3 baths	2,259 ft²
11/24/25	#8B	$4,200,000	No longer available on StreetEasy	3 beds	3 baths	2,320 ft²
03/22/22	#3B	$2,900,000	Sold (asking: $3,140,000; -7.64%)	3 beds	3 baths	2,322 ft²
03/06/21	#6A	$2,685,000	Sold (asking: $2,995,000; -10.35%)	2 beds	3 baths	2,259 ft²
03/04/21	#5A	$2,850,000	Sold (asking: $2,995,000; -4.84%)	2 beds	3 baths	2,259 ft²
08/29/18	#PH	$4,800,000	Sold (asking: $5,000,000; -4.0%)	3 beds	3.5 baths	3,223 ft²
08/15/18	#5B	$3,425,000	Sold (asking: $3,495,000; -2.00%)	3 beds	3 baths	2,322 ft²
07/11/17	#PH10/11	$5,950,000	No longer available on StreetEasy	3 beds	3.5 baths	3,223 ft²
01/01/15	#2A	$3,400,000	Sold (can't find government record)	2 beds	3 baths	2,259 ft²
06/26/14	#2B	$3,150,000	Sold (asking: $3,075,000; 2.44%)	2 beds	3 baths	2,322 ft²
05/23/14	#4B	$3,475,000	Sold (asking: $3,600,000; -3.47%)	3 beds	3 baths	2,300 ft²
03/25/14	#4A	$3,130,000	Sold (asking: $3,599,000; -13.03%)	2 beds	3 baths	2,259 ft²
11/14/12	#8A	$2,562,500	Sold (asking: $2,695,000; -4.92%)	2 beds	3 baths	2,259 ft²
11/07/12	#7A	$2,895,000	Recorded closing	2 beds	3 baths	2,259 ft²	-
04/27/12	#9B	$3,375,000	Sold (asking: $3,295,000; 2.43%)	2 beds	3 baths	2,322 ft²
04/26/10	#3A	$2,995,000	No longer available on StreetEasy	2 beds	3 baths	2,259 ft²
08/20/07	#7B	$2,800,187	Recorded closing	2 beds	3 baths	2,322 ft²	-
07/12/07	#6B	$2,647,450	Recorded closing	2 beds	3 baths	2,322 ft²	-
05/02/07		$2,825,000	No longer available on StreetEasy	2 beds	3 baths	2,322 ft²	-

Unavailable rentals

						Floor plan
02/23/26	#8B	$17,900	3 beds	3 baths	2,320 ft²
08/16/25	#8A	$20,000	2 beds	3 baths	2,259 ft²
04/30/22	#7A	$11,500	2 beds	3 baths	2,259 ft²
11/10/20	#6A	$10,000	3 beds	3 baths	2,259 ft²
07/06/20	#3B	$11,800	3 beds	3 baths	2,322 ft²
01/06/20	#6B	$11,500	2 beds	3 baths	2,322 ft²
11/28/14	#4B	$14,000	2 beds	3 baths	2,322 ft²
07/10/07		$12,500	2 beds	2 baths	2,322 ft²	-