Sky City

Sky City, or Sky City One, was an 838-metre-tall planned skyscraper 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. Including the 120 days required for prefabrication before on-site work commences, the sum of time needed is 210 days. Pre-construction activities were halted in August 2013 after government regulators required additional approvals.

Sky City, or Sky City One, was an 838-metre-tall planned skyscraper 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. Including the 1…