Board of Review Filing Windows
Appeal Dates & Deadlines
Cook County Board of Review filing dates are established separately for each township and can change from year to year. There is no single countywide annual filing deadline.
Current 2026 Filing Status
Group 2 Townships Are Currently Open
The Board of Review opened the following townships for 2026 assessment appeals on August 31, 2026:
Berwyn · Cicero · Elk Grove · Lakeview · Maine · Palos
The filing deadline for these Group 2 townships is September 29, 2026.
Current-status information on this page is dated September 11, 2026. Always confirm your township's official opening and closing dates with the Cook County Board of Review before filing.
When Can I Appeal?
You may file a Board of Review assessment appeal when your township is officially open for filing. Township filing periods vary annually and begin after the Assessor has completed the relevant assessment work.
How Long Is the Filing Window?
The Board of Review states that township appeal periods are open for a minimum of 30 days. The official closing date published by the Board is the controlling deadline.
What If My Township Has Not Opened?
Taxpayers may use the Board's pre-registration process to receive notice when their township opens. The Board also provides a pre-file option for eligible non-attorney filers before the township officially opens.
What If My Township Has Closed?
The Board's jurisdiction is tied to the official filing period. If the filing period has closed, taxpayers generally must wait for the next assessment year unless another remedy applies under law.
The Date That Matters
Your deadline is based on the township in which the property is located. Do not rely on a deadline for another township, a previous year, a workshop date, or the date printed on another taxpayer's notice.
Appeal Deadline ≠ Tax Payment Deadline
A Board of Review assessment-appeal deadline is different from a property-tax payment due date. Assessment appeals are handled by the Board of Review. Property-tax billing and payment are handled through the Cook County Treasurer.
GeorgeCardenas.com provides this information for taxpayer education. The Cook County Board of Review's officially published dates and filing rules control.