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Formerly known as the Sears Tower, Willis Tower has been an iconic part of the Chicago skyline since 1973. At 110 stories high, Willis Tower is also one of the largest skyscrapers in the world. In 2017, Willis Tower underwent a massive transformation to be reimagined for the future of work.
Willis Tower height: 1,451 feet high with 110 stories. Number of Willis Tower floors: The tower's main roof is considered as the 109th floor, with the mechanical penthouse roof considered as the 110th floor. It is the 12th tallest building in the world. The tower spans over 4.3 million square feet and features a remarkable 16,100 windows.
Willis Tower, skyscraper office building in Chicago, Illinois, located at 233 South Wacker Drive, that is one of the world’s tallest buildings. The Sears Tower opened to tenants in 1973, though construction was not actually completed until 1974.
For nearly 25 years after its completion, the Willis Tower, formerly known as the Sears Tower, held the title of tallest building in the world. Standing 110 stories tall, its black aluminum and bronze-tinted glass exterior has become emblematic of Chicago, a city crazy about its architecture.
Willis Tower is the premier corporate office building in Chicago, home to more than 100 companies including prominent law, insurance, transportation and financial services. Learn more about Willis Tower today!
At Skydeck, you can smoothly rocket to the top of Willis Tower at 24 feet per second, climbing 1,353 feet in one minute flat. Take in panoramic vistas of the iconic skyline, Lake Michigan and up to four states - Michigan, Indiana, Wisconsin and Illinois.
Willis Tower is Chicago's tallest building (and one of the world's loftiest). Breathe deeply during the ear-popping, 70-second elevator ride to the 103rd-floor Skydeck, then stride to one of the glass-enclosed ledges that jut out in midair for a knee-buckling perspective straight down some 1400ft.
