The answer to 'cost to replace skylight in Illinois' is that the cost to replace a skylight can vary significantly depending on several factors. Typically, the range for a standard skylight replacement in Illinois can be anywhere from $800 to $3,000 or more, depending on the size, type, and complexity of the installation.
The main factors that influence the cost include the size and style of the skylight, the materials used, the accessibility and complexity of the roof, any necessary structural modifications, and the labor costs in your local area. Larger, custom-made skylights or those that require more extensive roof work will be on the higher end of the price range. It's essential to get multiple local quotes from experienced roofing contractors to get an accurate estimate for your specific project.