Cook County Property Tax Appeal Deadlines & Due Dates 2021

Cook County Property Tax Assessment Calculator | KensingtonBelow is a 2021 listing of deadlines for appealing your property taxes in your township for both the Cook County Assessor and Board of Review.

  • Dates in green have been announced: the window to appeal is now open
  • Dates in red have passed: the window to appeal has closed
  • Dates in gray are estimated based on previous years

The earliest you can submit a property tax appeal is the date listed as “Open for Filing” and no property tax appeal will be accepted after the “Closed for Filing” deadline.

Learn why appealing by yourself can cost you more money than using Kensington

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Cook County Township
Cook County Assessor
Open for Filing
Cook County Assessor
Closed for Filing
Cook County Board of Review
Open for Filing
Cook County Board of Review
Closed for Filing
Barrington
July 14 
August 16
November 
December 
Berwyn
June 1
July 1
October 
November 
Bloom
July 23
August 23 
December 
January 
Bremen
September 
October 
December 
January 
Calumet
July 2 
August 3
September 
October 
Cicero
June 8
July 9 
November 
December 
Elk Grove
June 28
July 29
November 
December 
Evanston
May 7 
June 7
October 
November 
Hanover
July 14
August 16 
December 
January
Hyde Park*
August 
September  
December 
January 
Jefferson*
August 
October 
December 
January 
Lake*
September 
October 
December 
January 
Lake View*
July 
August
November 
December 
Lemont
May 
July 
October 
November 
Leyden
June 
July 
November 
December 
Lyons
July 
August 
November 
December 
Maine
July 23
August 23 
November 
December 
New Trier
June 1 
July 1
November 
December 
Niles
September 
October 
December 
January 
North Chicago*
September 
November 
December 
January 
Northfield
September 
October 
December 
January 
Norwood Park
May 17 
June 16
September 
October 
Oak Park
May 17 
June 16
October 
November 
Orland
July 2
August 3 
November 
December 
Palatine
June 14 
July 16
October 
November 
Palos
March
May 
September 
October 
Proviso
August 
October 
December 
January 
Rich
September 
October 
December 
January 
River Forest
April 21
May 21
October 
November 
Riverside
April 22
May 22
October 
November 
Rogers Park*
June 15   
July 19  
September 
October 
Schaumburg
June 16 
July 19 
November 
December 
South Chicago*
October 
November 
December 
January 
Stickney
June 
August 
October 
November 
Thornton
August 
September  
December 
January 
West Chicago*
July 21
August 23
October 
November 
Wheeling
May 
June 
November
December 
Worth
June 
July 
October 
November 

* City of Chicago Townships will be fully re-assessed in 2021 as part of the triennial schedule

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2020 Cook County Property Tax Appeal Deadlines & Due Dates

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