The answer to 'how much to replace dimmer switch in Illinois' is that the cost can vary significantly depending on several factors. Generally, you can expect to pay anywhere from $50 to $200 to have a dimmer switch replaced by a professional electrician in Illinois.
The exact cost will depend on the type of dimmer switch, the complexity of the electrical work required, the electrician's hourly rate, and your location within the state. Dimmer switches for basic light fixtures may be on the lower end of the range, while replacing a dimmer for a more complex lighting setup could be on the higher end.