Business Personal Property Public Assistance. The average cost of commercial general liability insurance for a small business in Maricopa, Arizona is between 400 and 1,200 dollars annually.Request a free quote from Maricopa, Arizona's insurance specialists – The Allen Thomas Group. Peace of mind guaranteed. We are here to provide the answers you need. Explore our comprehensive FAQ to better understand how our insurance coverage can protect your business. Call (520) 568-5588 for business, car, life insurance and more. Get a free quote from State Farm Agent Courtny Tyler in Maricopa, AZ. A CGL policy will cover accidents like customer slips and falls, defective products, and damages you or your employees cause to another's property. A general liability policy protects Phoenix businesses from lawsuits related to customer accidents, defamation, and copyright infringement.