The answer to 'skylight installation cost in Illinois' is that the cost can vary significantly depending on several factors, but typically ranges from $2,000 to $5,000 for a standard-sized skylight. The final price will depend on the size and type of skylight, the complexity of the installation, the accessibility of the roof, and the experience level of the contractor.
Larger or custom-made skylights, as well as those that require structural modifications to the roof, will be on the higher end of the cost range. Additionally, the location of the home, the local labor rates, and the cost of materials in your area can all impact the final price. It's essential to get multiple quotes from reputable roofing contractors in your local area to get an accurate estimate for your specific project.