The answer to 'lawn fertilization installation cost in Chicago' is that the typical cost can vary widely depending on several factors. In general, professional lawn fertilization services in the Chicago area tend to range from $50 to $150 per application, with most homeowners paying between $75 to $100 per treatment.
The exact cost will depend on the size of your lawn, the type and amount of fertilizer needed, whether any additional soil amendments or treatments are required, and the specific company you hire. Larger lawns, specialty fertilizers, and more comprehensive lawn care services will naturally cost more. It's important to get quotes from multiple local providers to find the best value for your needs.