When are Cook County property tax appeal deadlines?

Property tax appeal deadlines in Cook County are strictly enforced, vary by township, and change every year. Each of the county's 38 townships has a specific 30-day filing window. If you miss this window, you generally cannot appeal your assessment until the following calendar year.

How We Protect Your Right to Appeal:

Real-Time Monitoring: We track the Cook County Assessor and Board of Review daily to catch schedule updates the moment they are announced.
Two Filing Windows: Most properties have two opportunities to appeal annually—once at the Assessor level and once at the Board of Review.
Urgency Matters: Because these dates are rigid, a late filing is almost always rejected, regardless of how strong the evidence is.

Is your township open? Don't risk missing your window. Visit our Real-Time Township Deadline Tracker to see the current filing status for your specific neighborhood.

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Most Cook County homeowners are. Stop guessing and start saving.

Why Use Us?

70% Higher Success Rate than the average attorney appeal (2025).
Instant Analysis of your property.

OUR FEE STRUCTURE

We work on a contingency basis:

25% of your tax savings for the first year
$0 Due if we don't lower your taxes.

FAST & EASY START

Check your potential savings instantly.
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Relax—we handle the Assessor, Board of Review & PTAB.

Precision. Persistence. Professionalism.

Find Your Township’s Cook County Property Tax Appeal Deadline Check Your Tax Evaluation