The answer to 'how much does roof cost in Illinois' is that the cost of a new roof in Illinois can vary widely depending on several factors. Typical roof replacement costs in Illinois range from $10,000 to $20,000 on average, but the actual price can be higher or lower based on the size of the roof, the type of roofing material used, the complexity of the job, and your location within the state.
Factors that influence the cost of a new roof in Illinois include the roofing material (asphalt shingles, metal, tile, etc.), the pitch and complexity of the roof, the need for any structural repairs, and the labor costs in your specific area. It's important to get multiple quotes from reputable local roofing contractors to understand the range of pricing in your neighborhood.