The world's next tallest building, the Jeddah Tower, is scheduled to be completed by 2020 in Saudi Arabia. The world's tallest artificial structure is the 829.8-metre-tall (2,722 ft) Burj Khalifa in Dubai (of the United Arab Emirates).The building gained the official title of "tallest building in the world" and the tallest self-supported structure at its opening on January 9, 2010.The second-tallest self-supporting structure and the tallest tower in the world is the Tokyo Skytree. It includes buildings 427-m or 1,400ft or taller but not other structures such as towers, poles, and antennae cables. January 1, 2020 13 min read. In 2012, CTBUH published a research paper titled Tallest 20 in 2020: Era of the Megatall – The Projected World’s Tallest 20 Skyscrapers in the Year 2020.Though it was only eight years ago, the pace of change in the tall building world at the time was such that 2020 seemed like a distant lodestar in the future – but it has now arrived. Smith was also the designer of the world’s current tallest building, Burj Khalifa in Dubai, and he is, generally, known for his soaring towers in the US, South Korea… This list of future tallest buildings ranks the tallest buildings in the world which are proposed, approved or under construction. Heights are indicated by structural height, which includes architectural elements, but not communications spires or antennas. Note: All listed data for proposed or under construction buildings is based on the most reliable information currently available. The Council on Tall Buildings and Urban Habitat introduces a study and infographic on the coming age of megatall skyscrapers. The designing architect of the world’s first 1-kilometer high skyscraper is none other than Adrian Smith, from Adrian Smith + Gordon Gill Architecture. It would have 800 floors that could accommodate up to one million people. The Council on Tall Buildings and Urban Habitat has developed their own system for classifying tall buildings. Considering the shape of Earth and existing technology, we could possibly build a 4-kilometer-tall and 6-kilometer-wide building. What is the tallest structure humans could ever build? 100 Future Tallest Buildings in the World by Height to Architectural Top This list is the current 100 tallest completed, topped out, and under construction buildings in the world as ranked by Height to Architectural Top according to CTBUH Height Criteria.. French Spiderman Alain Robert Has Free Climbed The World’s Tallest Buildings And He Is Not Finished Jim Dobson Senior Contributor Opinions expressed by Forbes Contributors are their own. This 3,280-feet tower will be taller than the Dubai's iconic Burf Khalifa. Infographic: The world's tallest buildings by 2020. The buildings listed above are the top 10 tallest buildings in the world, you might be surprised that many notable buildings you familiar with are not listed, the rapid development of skyscrapers in worldwide has made those buildings dropped out from the top 10, below are the buildings succeed the top 10 tallest buildings with the heights a bit shorter than the top 10. 15 Tallest Buildings In The World | In 2020.