Cook County Property Tax Appeal Deadline Dates Updated

The county continues to make changes to the appeal dates for the 2020 property tax appeal calendar. You can find the latest dates and deadlines on our website at or through our free mobile app on the calendar tab.

Remember, it is important to appeal each and every year in order to have the Assessor’s office make the necessary adjustments if you’re paying more than your fair share.  Properties are assessed every 3 years automatically, but that doesn’t necessarily mean they are adjusted appropriately.  In between the 3 year period, no adjustments will be made unless you appeal.

With RTA’s Property Tax Appeal Service, we make the process of filing your appeal simple.  You can sign up at any time, as we’ll watch the calendar for you. Our one-time, affordable price enables you to file your appeal, and if necessary, your Board of Review appeal.