Christian de Portzamparc designed One57 for Extell Development Company, led by Gary Barnett, with SLCE Architects as architect of record. WSP was the structural engineer and Lendlease the main contractor. Plans were filed in March 2009. The infobox gives a construction start of April 17, 2009 and completion of August 13, 2014, while the text also says construction started in 2010.
The roof stands at 1,004 feet (306 m). The infobox gives 73 floors above ground, and the lead says 75 stories. The article calls the style modern. It has an L-shaped plan and a curved roof, and a facade of blue, pewter and silver glass. Concrete shear walls and columns rise to the 26th floor, and four liquid tuned mass dampers sit at the top.
It holds 92 condominiums and the 210-room Park Hyatt New York, with a separate residential entrance on 58th Street.
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