When Can You Appeal Property Taxes in Illinois?

For Illinois homeowners, property taxes can be one of the largest annual expenses. If you believe your property has been over-assessed, you may be wondering: when can you appeal property taxes in Illinois?

The answer depends on your county’s specific deadlines, but in general, Illinois allows taxpayers to appeal after receiving their property tax assessment notice. Counties typically open a 30-day window to file an appeal once assessments are published. For example, in Cook County, property owners may appeal after their township assessment notice is mailed, with exact filing dates available on the Cook County Assessor’s Office website. Other counties publish their deadlines through their assessor’s or board of review office, such as the Illinois Department of Revenue’s resources.

There are several grounds for filing a property tax appeal, including:

• Your property is assessed higher than similar nearby properties.
• There are factual errors in your property’s description.
• A recent professional appraisal indicates a lower fair market value.

Hiring an independent appraiser can strengthen your appeal. A credible appraisal provides evidence of true market value, which can be presented to the Board of Review. Keep in mind that missing the appeal deadline generally means waiting until the next assessment year.

Staying informed of your county’s assessment cycle and acting quickly once notices are mailed ensures you don’t miss the opportunity.

At Real Valuation Services, we provide property appraisals across Illinois to support homeowners in property tax appeals. Contact us today for an independent appraisal that can help you save money on your tax bill.

Ready to explore a property tax appeal? Contact Real Valuation Services for a professional home appraisal. Our experienced appraisers serve the Chicagoland area, delivering accurate valuations that can help you with a property tax appeal.