The answer to 'how much to replace GFCI outlet in Chicago' is that the cost can vary widely depending on several factors. Generally, you can expect to pay between $75 to $200 to have a professional electrician replace a GFCI outlet in the Chicago area. The exact price will depend on the complexity of the job, the materials needed, the electrician's labor rates, and your location within the city.
GFCI outlets are required by code in areas near water sources, such as kitchens, bathrooms, laundry rooms, and exterior outlets. Replacing a GFCI is a relatively straightforward job for an experienced electrician, but it's important to use a licensed and insured professional to ensure the work is done safely and up to code.