Cook County Tax Appeal Process

Cook County Tax Appeal Agencies

Cook County Assessor’s Office
(Can also apply for refunds 3 years back)

  • Assessment notice sent
  • Appeal submitted by deadlines
  • First decision made
  • Re-review process
Cook County Board of Review
(Agency does not grant tax refunds)

  • Appeal submitted by deadlines
  • First decision made
  • Re-review process

What Every Property Owner Should Know
About the Appeals Process

  • Appeals are normally processed through 2 county agencies – the Cook County Assessor’s Office and County Board of Review.
  • You are not required to file first at the Assessor’s office to seek relief at the Board of Review.  However, you must at least file an appeal at the Board of Review to seek tax relief at the State Property Tax Appeal Board.
  • You may file with any appeal agency as often as you feel necessary to achieve a fair tax adjustment on any given year, not just in the first triennial reassessment year.
  • The appeal reviewers may take as long as 3 to 5 months to finalize a decision on your tax complaint, but your tax savings can last as long as 3 years.
  • All tax savings granted by the Assessor and Board of Review will appear on your second installment tax bill.  PTAB reductions can only be granted as refunds.
  • There are 38 townships in Cook County with 2 specific deadlines for each — initial filing deadlines and re-review deadlines. Because we must monitor and meet 76 deadlines within 6 months, it is impossible to contact each taxpayer while cases are actively undergoing the review process.
  • When appealing property taxes, patience is a must! You will be informed, once your case is finally decided. You will then be advised whether it is necessary to go for more tax relief at the next agency.

Other Important Information for Clients

Township Appeal Deadlines
Chicago Collar Counties

McHenry County Townships Lake County Townships Kane County Township DuPage County Townships Cook County Township Will County Township