Extell Development Company

Extell Development Company is an American real estate developer of residential, commercial, retail, hospitality, and mixed-use properties. Founded in 1989 by Gary Barnett, the company’s portfolio exceeds 20 million square feet. The company has between 125 and 150 employees. Prior to 2005, it was known as Intell Management and Investment.

In a 2013 survey conducted by The Real Deal, Extell was the most active builder in Manhattan, with at least 11 active projects totalling over five million square feet.

In the early 2010s, Extell used financing from Abu Dhabi's sovereign wealth funds to build One57, the first "Supertall" residential skyscraper in Midtown Manhattan, which kickstarted the creation of the "Billionaires' Row," a series of super-tall condo towers below Central Park. Extell has also built a number of different buildings on the Upper East Side, in Manhattan.

In 2020, Extell completed Central Park Tower, the world's tallest purely residential building. To finance the 1,550 foot tower Extell relied on financing from the Israeli bond market, the EB-5 visa program and the Chinese-state owned Shanghai Municipal Investment Group.

In 2025, Extell announced plans to build a residential tower the size of the Empire State Building on the location of the former ABC Studios building on West 66th Street (Manhattan) and Columbus Avenue (Manhattan). Although the site's unique zoning allows the developer to build a super-tall luxury skyscraper without requiring any units of affordable housing, Extell has offered to build 121 Affordable housing units at the complex, primarily studios for senior citizens, in an effort to avoid the costly legal battles that plagued 50 West 66th Street.