One World Trade Center is America’s tallest building, council rules The Council on Tall Buildings and Urban Habitat’s Height Committee said the spire atop the 1,776-foot structure is permanent, settling a debate between New York and Chicago over the tallest-building mantle.

One World Trade Center is America’s tallest building, council rules The Council on Tall Buildings and Urban Habitat’s Height Committee said the spire atop the 1,776-foot structure is permanent, settling a debate between New York and Chicago over the tallest-building mantle.