The answer to 'how much does generator installation cost in Illinois' is that the cost can vary widely depending on several factors. Typically, the installation of a whole-home generator in Illinois can range from $3,000 to $15,000 or more. The specific cost will depend on the size and type of generator, the complexity of the installation, the accessibility of the installation site, and any necessary electrical work or permits.
Homeowners should get multiple quotes from licensed and insured electricians in their local area to get an accurate estimate for their specific project. The cost can also be influenced by the brand and features of the generator, the difficulty of the installation, and whether any landscaping or construction work is required.