![693px-Willis_Tower_From_Lake willis tower 2019](https://www.chicagoconstructionnews.com/wp-content/uploads/2020/06/693px-Willis_Tower_From_Lake.jpg)
Work on renovating and updating the Willis Tower at 233 S Wacker Dr. continues, reflected by a recent $28 million building permit for alterations on the building’s 44th floor.
The general contractor for this work is Development Solutions, Inc. Key subtrades include: Electrical – Premium Electric Services, Inc.; plumber/plumbing – Great Lakes Plumbing & Heating; and ventilation – Competitive Piping Systems.