Articles
Plain-language guides to Cook County property tax assessments, appeals, and filing deadlines.
Cook County property tax appeal deadlines: how the 2026 calendar actually works
Cook County has no single appeal deadline. All 38 townships get their own window on a rolling calendar. See how it works and check your township's live 2026 deadline.
July 12, 2026
How to appeal your Cook County property taxes, step by step
Appealing your Cook County assessment is free and has no downside risk. See the five steps, what evidence wins, and how the Assessor and Board of Review windows work.
July 12, 2026
Check your property for free
See whether your Cook County home is assessed above the median for comparable properties nearby. The check is free and takes about a minute.
Check your property