The answer to 'roof replacement installation cost in Illinois' is that the typical range for a full roof replacement can vary widely, but generally falls between $10,000 to $30,000 on average. The exact cost will depend on factors like the size of your roof, the roofing material used, the complexity of the installation, and your location within Illinois.
Roof replacement is a significant investment, so it's important to get quotes from multiple licensed and insured roofing contractors in your local area. They can assess your specific needs and provide an accurate estimate for the work required.