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Mini Sky City in Changsha, China, is the world’s fastest-built skyscraper, constructed in just 19 working days by Broad Sustainable Building (BSB). The 57-story, 204-meter tall tower was assembled using precast modular technology, with 95% of the structure prefabricated off-site. It houses over 800 apartments and office space for 4,000 people. The building is designed to be earthquake-resistant up to magnitude 9 and includes eco-friendly features like quadruple-pane glass that cuts emissions. It’s a global benchmark in speed, sustainability, and smart engineering in precast construction.
