The World Trade Center is a three-building office complex in Portland in the U.S. state of Oregon. The main building, One World Trade Center, is a 17-story office tower that is the fifth-largest office tower in Portland with 474,867 sq ft. Completed in 1977, One World Trade Center is 230 feet tall and is topped by a heliport. The complex is operated by the World Trade Centers Association and is the headquarters for Portland General Electric.