Existing Businesses

In O’Fallon, we value our business community, and we want to help you get the job done efficiently and affordably. This page includes important information you need as a business owner. Can’t find what you’re looking for? Please contact our Economic Development Department for assistance.

• Business Watch Program 
• Code Enforcement
• Helpful phone numbers
• Planning and Development
• Building and permits
• Smoke-Free O’Fallon
• O'Fallon maps