Cook County, IL · 2025

4 homes in this zip may be paying too much in property taxes — a collective ~$0.3M above the neighborhood median.

The typical flagged property is overassessed by ~$97,040. Overassessments range from ~$19,975 to ~$135,081. Ownwell can file your appeal and handle everything — no upfront cost, you only pay if you save.

Appeal windows vary by township, March–November 2026. Find your township's open window at cookcountyassessor.com.