The answer to 'how much to replace surge protection in Illinois' is that the cost can vary widely depending on several factors. Typical ranges for professional surge protector replacement in Illinois are generally between $100 to $500, though some more complex installations may cost more.
The main factors that influence the cost include the type of surge protector needed (whole-home vs. individual device), the complexity of the electrical system, the location and accessibility of the installation, and whether any additional electrical work is required. Getting local quotes from licensed electricians is essential to determine the precise cost for your specific situation.