Cook County property tax
Cook County property tax appeal guides
Use these plain-language guides to understand the two appeal offices, choose comparable sales, and prepare to file your own appeal.
Assessor appeal vs Board of Review appeal
Learn how Cook County's two separate appeal opportunities differ and what evidence they have in common.
How to find comparable sales
Review the property facts and sale characteristics that make one home a useful comparison for another.
How to appeal without a lawyer
See what homeowners need to file for themselves, what filing costs, and when professional help may still make sense.
Browse Cook County township appeal guides for local filing-window status and evidence guidance.