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 15
October 18
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 16
September 17 
December 
January 
Lake*
November 4
December 6
December 
January 
Lake View*
November 22
December 23
November 
December 
Lemont
August 14
September 14
October 
November 
Leyden
August 30
September 30
November 
December 
Lyons
September 21
October 25
November 
December 
Maine
July 23
August 23 
November 
December 
New Trier
June 1 
July 1
November 
December 
Niles
November 1
December 3
December 
January 
North Chicago*
September 17
October 19
December 
January 
Northfield
September 3
October 4
December 
January 
Norwood Park
May 17 
June 16
December 06
January 04
Oak Park
May 17 
June 16
December 06 
January 04
Orland
July 2
August 3 
November 
December 
Palatine
June 14 
July 16
October 
November 
Palos
August 12
September 13
September 
October 
Proviso
October 8
November 8
December 
January 
Rich
October 26 
November 29
December 
January 
River Forest
April 21
May 21
December 06
January 04
Riverside
April 22
May 22
December 06
January 04
Rogers Park*
June 15   
July 19  
September 
October 
Schaumburg
June 16 
July 19 
November 
December 
South Chicago*
September 30
November 1
December 
January 
Stickney
October 14
November 29
October 
November 
Thornton
August 9
September 9  
December 
January 
West Chicago*
July 21
August 23
October 
November 
Wheeling
October 5
November 5
November
December 
Worth
August 24 
September 24
October 
November 

* City of Chicago Townships will be fully reassessed 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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