Now, two years later, the Office of the Inspector General says a follow-up audit shows the department has made no improvements to prevent potentially unsafe construction.
The audit found 42 buildings were allowed to be constructed between 2017 and 2019, despite passing just 11 of the 398 combined safety inspections that were required of them.
The Buildings Department says its working on a fix could take two more years to complete.
Illinois Answers Project Government Finance & Accountability Reporter Alex Nitkin joined ABC7 to weigh in on the findings in the initial audit.