How to Verify an Illinois Pest Control License

Check the IDPH business license and technician certification

Illinois licenses the business and certifies the technicians separately. To check both:

• Ask the company for its IDPH structural pest control business license number.
• Confirm the number with IDPH before work starts.
• Ask the technician for personal certification — Illinois technicians pass a 100-question General Standards exam and a 50-question category exam (University of Illinois Extension).
• Check the renewal; licenses renew every three years with a recertification seminar (Illinois workNet).
• Write the license number on your service paperwork.

Why IDOA registration and insurance matter too

IDPH covers the structural pest business and its technicians, while the IDOA handles pesticide applicator and dealer licensing. A commercial applicator must carry a surety bond or a certificate of liability insurance for personal injury or property damage (IDOA). Ask for the certificate of insurance before the first treatment, so you are covered if a treatment damages property.

Pesticide Act fees in Illinois changed on January 1, 2024 and January 1, 2026, so current amounts are confirmed at the agency sites.

A truck and a sprayer are not a license

Pest work can look like simple spraying, and many ads never mention licensing. But operating a commercial structural pest control business without the state license is a Type B violation with a $1,000 first-offense fine (IDPH, 2015). The license is what separates a licensed exterminator from a seller of spray.

Joliet Pest Control Service connects you with a licensed Illinois pest control provider, and you can verify that provider’s license before the first visit.