Current Tallest Building and Its Official Height
The tallest building in the world is Burj Khalifa in Dubai, United Arab Emirates, with an architectural height of 828 meters and 163 occupied floors, a record it has held since its completion in 2010. The structure was developed by Emaar Properties and designed by Skidmore, Owings & Merrill, with Adrian Smith as the lead architect, and its official height is recognized by the Council on Tall Buildings and Urban Habitat and major height databases such as the Skyscraper Center, which tracks global supertall projects alongside data from developers and engineering firms (for current rankings and project details see Skyscraper Center).
Burj Khalifa functions as a mixed-use tower, combining residential, hotel, and office space, and its height is measured to the top of its architectural spire rather than to the tip of any antenna, a distinction that places it ahead of previous record holders such as the Willis Tower and Taipei 101 in standard height rankings used by organizations like the CTBUH and real estate research platforms (for an overview of how height is measured and why spire height matters see Council on Tall Buildings and Urban Habitat).
Engineering, Construction, and Key Design Facts
Structural System and Foundation
Burj Khalifa uses a buttressed core structural system with a Y-shaped floor plan, which helps distribute wind loads and reduce vortex shedding, while its foundation rests on reinforced concrete piles driven into deep sandstone layers to support the tower's estimated 500,000-tonne weight.
The tower's cladding system features reflective glazing and textured stainless steel spandrels to manage solar heat gain, and its cooling, water, and vertical transportation systems were designed to serve a peak occupancy of several thousand people daily while maintaining energy efficiency targets aligned with Dubai's urban sustainability guidelines (for technical project highlights and engineering milestones see Forbes).
Comparison With Other Supertall Projects and Future Tallest Building Contenders
Current Global Supertall Rankings
As of the latest publicly available data, Burj Khalifa remains the tallest completed building in the world, followed by Merdeka 118 in Kuala Lumpur at 678.9 meters and Shanghai Tower in Shanghai at 632 meters, with both towers classified as supertall by the CTBUH and tracked alongside hundreds of other tall projects in global databases (for up-to-date height rankings and project status see Skyscraper Center).
Several proposed towers, including Jeddah Tower in Saudi Arabia and other supertall concepts in China and the Middle East, aim to surpass Burj Khalifa's height, but as of the most recent public updates none have been completed, and their final heights and timelines remain subject to construction progress, funding, and regulatory approvals (for current status of proposed supertall projects see Forbes).