Cost & representation
How much does it cost to appeal property taxes in Cook County?
Filing with the Cook County Assessor and the Board of Review is free — the county charges nothing to appeal. ChonkHub charges a one-time $49.15 to build your evidence packet; you file it yourself and keep 100% of any reduction. No percentage of your savings, no subscription.
That is the difference from contingency services, which take 25–50% of your first-year savings every year they represent you. Because you file on the free county portal, the only cost is the one-time packet, and every dollar saved stays with you.
Check your address — freeSee your own assessment math before you file. You keep 100%.