The answer to 'rat extermination cost in Chicago' is that the typical cost for professional rat removal and control services in the Chicago area can range from $300 to $800 or more, depending on several factors. The specific cost will depend on the severity of the rat infestation, the size of the home or property, the complexity of the treatment required, and the experience and reputation of the pest control company.
For example, a simple one-time treatment for a minor rat problem in a small home may cost on the lower end of the range, while a large-scale rodent infestation that requires extensive trapping, baiting, and sealing entry points could be on the higher end. It's important to get local quotes from reputable pest control providers to get an accurate estimate for your specific situation.