Cook County, Illinois

Cook County Property Taxes

Property taxes in Cook County are proportional to assessed property values. Therefore, a higher assessed property value means a higher tax bill. In an effort to estimate fair market prices, the Assessor re-estimates a property's value once every 3 years (each year 1/3 of Cook County properties are reassessed).

By law, the assessed value of every property in Cook County may be appealed each year even though the Assessor re-values only 1/3 of them.

If a property's assessed value is successfully appealed during a reassessment year, this means that the property owner will save money for 3 straight years.

Townships

Cook County has 38 townships. Property taxes can be appealed only during specific times:

Township Appeals Opened Appeals Closed
River Forest 4/21/2021 5/21/2021
Riverside 4/22/2021 5/22/2021
Evanston 5/7/2021 6/7/2021
Oak Park 5/17/2021 6/16/2021
Norwood Park 5/17/2021 6/16/2021
Berwyn 6/01/2021 7/01/2021
New Trier 6/01/2021 7/01/2021
Cicero 6/08/2021 7/09/2021
Rogers Park 6/11/2021 7/13/2021
Palatine 6/14/2021 7/16/2021
Schaumburg 6/16/2021 7/19/2021
Elk Grove 6/28/2021 7/29/2021
Calumet 7/02/2021 8/03/2021
Orland 7/02/2021 8/03/2021
Hanover 7/14/2021 8/16/2021
Barrington 7/14/2021 8/16/2021
West Chicago 7/21/2021 8/23/2021
Bloom 7/23/2021 8/23/2021
Maine 7/23/2021 8/23/2021
Thornton 8/09/2021 9/09/2021
Palos 8/12/2021 9/13/2021
Lemont 8/14/2021 9/14/2021
Jefferson 8/16/2021 9/16/2021
Worth 8/24/2021 9/24/2021
Leyden 8/30/2021 9/30/2021
Northfield 9/03/2021 10/04/2021
Bremen 9/15/2021 10/18/2021
North Chicago 9/17/2021 10/19/2021
Lyons 9/21/2021 10/25/2021
South Chicago 9/30/2021 11/01/2021
Wheeling 10/05/2021 11/05/2021
Proviso 10/08/2021 11/08/2021
Stickney 10/14/2021 11/15/2021
Lake TBD TBD
Lake View TBD TBD
Hyde Park TBD TBD
Rich TBD TBD
Niles TBD TBD

Past Calendars