City of Chicago's Dept. of Business Affairs & Consumer Protection (BACP)
121 N. La Salle St., Room 800, Chicago, IL 60602
312-74-GOBIZ (744-6249)
BACP promotes and ensures a fair and vibrant market place for businesses and consumers.  They do so by licensing Chicago's businesses and public vehicles, providing business education and protecting consumers from unfair practices.

• Main Page (with info on business licenses, license forms, etc.)
• Info by License Type (with information specific to business type)