The answer to 'surge protector installation cost in Illinois' is that the typical cost for a professional to install a whole-home surge protector can range from $200 to $500 or more, depending on several factors. These include the type of surge protector, the difficulty of the installation, and whether any electrical panel upgrades or other electrical work is required.
Factors that can influence the cost include the size and complexity of your electrical system, the accessibility of the installation location, and whether you need to upgrade your electrical panel to accommodate the surge protector. DIY installation may be possible for some homeowners, but it's generally recommended to hire a licensed electrician to ensure the work is done safely and up to code.