The answer to 'how much to replace GFCI outlet in Illinois' is that the cost can vary widely, typically ranging from $100 to $300 or more. Factors that affect the price include the specific location, the complexity of the electrical work, the cost of materials, and whether any additional wiring or electrical panel upgrades are required.
In general, a basic GFCI outlet replacement by a licensed electrician in Illinois will usually cost between $100 and $200. More complex jobs, such as replacing multiple GFCI outlets or needing to upgrade the electrical panel, can push the price up to $300 or higher. It's essential to get local quotes from qualified electricians to get an accurate estimate for your specific project.