Property tax appeals
Illinois Property Tax Appeal Guides by County
Find your county for property tax appeal deadlines, filing instructions, and local resources in Illinois.
Get My Savings EstimateIllinois at a glance
Population
12.8 million
Median home value
$203,000
Average property tax
$4,900
Effective tax rate
2.16%
Choose a county below for its local property tax appeal process, deadlines, and official filing resources.
Find your county
Local deadlines, filing instructions, and official resources. Start with your county.
County guides in Illinois
County guides are coming to Illinois
We haven't published a county guide for Illinois yet. You can browse other state guides or contact us with a question about your property.
Check your property's potential savings
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Available exemptions
Homeowner Exemption ($10,000 in Cook County)
Senior Citizens Homestead Exemption
Senior Freeze Exemption
Disabled Veterans' Standard Homestead Exemption
Disabled Persons' Homestead Exemption
Special programs
Senior Citizens Assessment Freeze
Review eligibility and timing before filing a Illinois property tax appeal.
Property Tax Extension Limitation Law (PTELL)
Review eligibility and timing before filing a Illinois property tax appeal.
Longtime Homeowner Exemption
Review eligibility and timing before filing a Illinois property tax appeal.