28 East 21st Street is a pre-war co-op building in downtown Manhattan's Flatiron/Union Square neighborhood finished in 1925. Situated at 28 East 21st Street, between Park Avenue South and Broadway, the building contains 9 units and rises 5 stories.
Before it was converted to a cooperative, the building served as the studio for Richard Morris Hunt, architect of the Met, the Biltmore estate, and classic homes on the eastern seaboard. In its current incarnation, it offers excellent access to Union Square Park, Madison Square Park, and the best shopping and dining in the Flatiron District.
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For some co-ops, instead of price per square foot, we use an estimate of the number of rooms for each sold apartment to chart price changes over time. This is because many co-op listings do not include square footage information, and this makes it challenging to calculate accurate square-foot averages.
By displaying the price per estimated room count, we are able to provide a more reliable and consistent metric for comparing sales in the building. While we hope that this gives you a clearer sense of price trends in the building, all data should be independently verified. All data provided are only estimates and should not be used to make any purchase or sale decision.
|
Year
Avg Price / Room (Est)
Avg. Actual Price
Med. Actual Price
Transactions
2025
-
-
0
2024
-
-
0
2023
-
-
0
2022
-
-
0
2021
-
$1,995,000
1
2020
$380,000
$2,280,000
1
2019
-
-
0
2018
-
-
0
2017
-
-
0
2016
-
-
0
2015
$350,000
$1,050,000
1
2014
-
-
0
|
Year
Avg Price / Room (Est)
Avg. Actual Price
Med. Actual Price
Transactions
2013
$273,333
$820,000
2
2012
$264,167
$792,500
2
2011
-
-
0
2010
-
-
0
2009
-
-
0
2008
$260,361
$857,333
3
2007
$238,333
$715,000
1
2006
-
$1,775,000
1
2005
-
-
0
2004
$39,000
$195,000
1
2003
-
-
0
|
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