In 2006 the City of Chicago granted a building permit to Health Care Service Corporation Blue Cross Blue Shield of Illinois to renovate the building upwards, which gave additional 24 stories and made the building 57 stories in total (3 floors below ground).
Upon its completion, it becomes the first project in Chicago that built upon the existing tower.
In 2006 the City of Chicago granted a building permit to Health Care Service Corporation Blue Cross Blue Shield of Illinois to renovate the building upwards, which gave additional 24 stories and made the building 57 stories in total (3 floors below ground). Upon its completion, it becomes the first project in Chicago that built upon the existing tower.
Blue Cross Blue Shield Tower