Tallest buildings in future No.2 ) Sky City

Sky City , is an 838 meters (2,749 ft) height skyscraper under construction in the city of Changsha, Hunan in south-central China. The prospective builders, Broad Sustainable Building, estimated it would take just 90 days to construct, but this is not counting 120 days of prefabrication before on-site work begins. The total schedule is just 210 days.

Sky City will cost $1.46 billion to build. According to Broad Sustainable Building CEO Yue Zhang, the building is meant to save on energy and land.

The group says the 202-story, 1.05 million-square-meter building will keep at least 2,000 cars off of Changsha city streets by creating an environment no one needs to leave.The tower will house more than 30,000 people alongside a shopping mall, school, hospital, office areas, roof garden, amusement park and sports facilities. "Residents don't need to step out of the building, they can do everything within it," said Zhang. This project will be completed in April 2014.

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References:

http://www.cnn.com/2013/07/24/travel/sky-city-breaks-ground/index.html

http://prafulla.net/graphics/amazing/sky-city-worlds-tallest-building-in-changsha-china/

http://luxedb.com/sky-city-in-china-worlds-tallest-tower/