March 24, 2026
Thornton Township is one of the South District townships in Cook County's 2026 reassessment cycle. If you own property in Thornton Township — covering Harvey, Hazel Crest, Homewood, Flossmoor, South Holland, and surrounding communities — your appeal window is currently open.
Every three years, Cook County reassesses all properties in a township district. The South District is up in 2026. This means the Assessor is recalculating every property's value — and in many cases, assessments are increasing faster than actual market values warrant.
2025 saw Cook County commercial values drop significantly while residential values held or rose. That shift pushed more of the tax burden onto homeowners. Appealing your 2026 reassessment is one of the only ways to push back.
The Cook County Assessor weighs appeals based on comparable sales data. You need to show that similar homes in your area sold for prices that imply a lower assessed value than what you've been assigned.
Overtaxed IL automates this — we pull the comparable sales, calculate your potential overpayment, and walk you through filing.
Based on Cook County Board of Review data, homeowners who appeal in reassessment years see some of the highest reduction rates. For a median-value home in the $200,000–$350,000 range, successful appeals typically result in:
Enter your property address at overtaxed-il.com/check to see if your Thornton Township assessment is higher than your neighbors'. The check is free, takes 60 seconds, and requires no account.