The answer to 'quarterly service extermination cost in Illinois' is that the cost for quarterly pest control service can vary significantly depending on several factors. In general, you can expect to pay anywhere from $100 to $300 per quarter for a standard pest control package that covers common household pests like ants, spiders, and rodents.
The exact cost will depend on the size of your home, the severity of the pest problem, the specific services required, and the pest control company you choose. Larger homes, more complex infestations, and specialized treatments will typically cost more. It's essential to get quotes from multiple local pest control providers to find the best value for your needs.