Cook County Assessor vs. Board of Review
The normal sequence is the Cook County Assessor first, then the Board of Review. They are separate opportunities with separate filing systems and deadlines.
Check the evidence before choosing a filing path.
Enter a Cook County address or property PIN.
Free to check first. No credit card required.
Assessor SmartFile
Board complaint portal
Only while the property’s township is open for Assessor appeals.
During the Board’s official township filing period; pre-filing may be available.
Property corrections, market-value support, or lack-of-uniformity comparables.
Complaint notes plus comparable-property evidence and other supporting exhibits.
No. It is a separate review by the Assessor’s Office.
No. It is an independent review by the Board.
Which stage is next?
Use the Assessor first while that township window is available if you want both review opportunities. The Assessor appeal is optional, but skipping it means giving up that separate review. A Board pre-file does not preserve or substitute for an Assessor appeal. After the Assessor window closes, use the Board’s current township status and pre-filing options. Do not assume a deadline from another township applies to your property.
Official filing destinations
Prepare the property comparison once, then use the stage that is available.
Deadlines and procedures can change. Confirm the current township status on the official Cook County website before filing.