The answer to 'generator installation cost in Illinois' is that the cost can vary widely depending on several factors. Typical ranges for a whole-home generator installation in Illinois can be anywhere from $5,000 to $15,000 or more. The final price will depend on the size and type of generator, the complexity of the electrical work required, the accessibility of the installation site, and any local permitting or inspection fees.
Larger generators for whole-home backup power will generally cost more than smaller portable units. The installation process, which may involve upgrading the electrical service, can also significantly impact the overall cost. It's essential to get quotes from multiple licensed and insured electrical contractors in your local area to understand the specific pricing for your home and needs.