Willis Tower tops out at 1,451 feet at its parapet — for all practical purposes, the roof. Central Park Tower reportedly surpassed that mark this week on its way to 1,550 feet.

"Willis Tower still is tallest in terms of how high you can stand above the earth, but when you look at sort of what's totally built from the ground up, then One World Trade Center wins," she said.

Willis Tower and the Chicago skyline on Nov. 12, 2013, the day the tall buildings council announced that One World Trade Center would become the country’s tallest building when completed.

UPDATE: 11/12/2013 12:05 p.m. CHICAGO (CBS)-- The Willis Tower on Tuesday lost the title of the tallest building in the United States to the new World Trade center in New York. Technically, the ...

Willis Tower, once the world’s tallest building, now the nation’s second-tallest, is in line for a $500 million facelift, under an ambitious plan embraced by Mayor Rahm Emanuel.

Willis Tower, downtown’s 1,450 ft. stack of architecture, engineering, commerce and civic pride, turns 40 next year. If you are of a certain age, that milestone might be as jarring as the fact ...

A Willis Tower spokesman Bill Utter clarified Thursday that it was a protective coating, not glass, that cracked – as it sometimes does. “At no time whatsoever was the integrity of the ...

The Willis Tower's value has decreased by 42% since 2018, falling below its outstanding loan balance. A recent appraisal valued the Willis Tower at $1.03 billion ($229 per square foot), down from ...

Photos: Chicago's iconic Willis Tower. The currently underutilized plaza space will be replaced by a three-story retail structure that will wrap around the base of 110-story tower.

So Blackstone, which paid $1.3 billion for Willis Tower in 2015, wants to expand the Skydeck to the entire 102nd floor, effectively doubling its capacity, the report said.

Willis Tower lost power early Monday after flooding from the Chicago River spilled into the building’s basement. ComEd was notified about 2 a.m. that flooding on Lower Wacker Drive had affected ...

A Willis Tower spokesman Bill Utter clarified Thursday that it was a protective coating, not glass, that cracked – as it sometimes does. “At no time whatsoever was the integrity of the ...