Construction originally began in 2010 , but was delayed until 2014 because of a lack of an anchor tenant . The building 's concrete core was topped out to maximum height in August 2016 , with the perimeter steel structure following on October 6 , 2016 . The building opened on June 11 , 2018 . The building was designed by Rogers Stirk Harbour Partners , and is managed by Silverstein Properties through a ground lease with the Port Authority of New York and New Jersey , who owns the land . It is high , with 80 stories . , it is the sixth-tallest building in the city . __ TOC __ The Marriott World Trade Center was a 22-story steel-framed hotel building with 825 rooms . It had a roof height of 73.7 m ( 242 ft ) and was designed by Skidmore , Owings & Merrill . Its structural engineer was Leslie E. Robertson Associates with Tishman Construction serving as the main contractor . Construction began in 1979 . It opened on July 1 , 1981 as the Vista International Hotel and was located at the southwest corner of the World Trade Center . It was heavily damaged in the 1993 World Trade Center bombing and was subsequently closed until repairs were completed the following year . Forty people died when the hotel was destroyed during the September 11 attacks . The hotel 's remains were later dismantled to make way for construction of the National September 11 Memorial & Museum
1993 World Trade Center bombing
1993 World Trade Center bombing
3 World Trade Center