Understand the appeal process before you file.
Plain-language guidance for comparing assessments, choosing a filing path, and preparing evidence.
Start here
Cook County property assessment appeal guide
Understand assessed value, deadlines, evidence, and the basic filing sequence.
EvidenceHow to find comparable properties
See what makes another home a useful assessment comparison.
Filing pathAssessor vs. Board of Review
Compare the two Cook County filing routes and their practical differences.
DecisionDIY appeal vs. property tax attorney
Choose between self-filing, organized research support, and representation.
Check your property
See whether similar homes are assessed lower.
Enter a Cook County address or property PIN.
Free to check first. No credit card required.