During your project, a variety of required inspections may need to occur. Most inspections require 24-hour notice. Call the Inspectional Services Division (630)823-5860. Be ready to provide a contact name, phone number, street address, permit number, and the type of inspection requested. Our inspections are open window in the morning between 9:00-11:30 a.m. and afternoons 1:00-3:30 p.m. Plumbing inspections are scheduled only as morning (8:30 -12:00 a.m.).