One57, formerly known as Carnegie 57, is a 75-story (marketed as 90-story) skyscraper currently under construction at 157 West 57th Street in the Midtown neighborhood of Manhattan, New York City. Upon completion in 2014, it will stand at 306 meters (1004 feet) tall, making it the tallest residential building in the city, however it is projected to be overtaken by 432 Park Avenue once completed in 2015. The building will have 92 condominium units on top of a new Park Hyatt Hotel with 210 rooms. The contractor is Lend Lease Project Management & Construction, and the developer is Extell Development Company.
Extell Development Company’s founder and President, Gary Barnett, spent 15 years assembling the property and air rights on 57th Street. At first, he said he wanted to build a 300,000 square-foot building, but plans for views of the park took shape as the assemblage got larger and markets started rising to new levels.