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
December 22
January 20
Berwyn
June 1
July 1
January 3
February 1
Bloom
July 23
August 23 
February 28 
March 29
Bremen
September 15
October 18
February 28 
March 29
Calumet
July 2 
August 3
December 22
January 20
Cicero
June 8
July 9 
December 22
January 20
Elk Grove
June 28
July 29
February 14 
March 15
Evanston
May 7 
June 7
February 14
March 15
Hanover
July 14
August 16 
January 3 
February 1
Hyde Park*
December 15
January 21
April 11 
May 10 
Jefferson*
August 16
September 17 
May 2 
May 31 
Lake*
November 4
December 6
April 26 
May 26 
Lake View*
November 22
December 23
April 11
May 10 
Lemont
August 14
September 14
February 14
March 15
Leyden
August 30
September 30
April 4
May 3 
Lyons
September 21
October 25
April 26 
May 26 
Maine
July 23
August 23 
March 28 
April 26 
New Trier
June 1 
July 1
January 3
February 1
Niles
November 1
December 3
May 2 
May 31 
North Chicago*
September 17
October 19
April 26 
May 26
Northfield
September 3
October 4
April 11
May 10 
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 
February 14
March 15
Palatine
June 14 
July 16
February 14
March 15
Palos
August 12
September 13
March 28 
April 26
Proviso
October 8
November 8
May 2
May 31 
Rich
October 26 
November 29
May 2 
May 31 
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  
February 14
March 15
Schaumburg
June 16 
July 19 
January 3 
February 1
South Chicago*
September 30
November 1
April 26 
May 26 
Stickney
October 14
November 29
May 2
May 31 
Thornton
August 9
September 9  
February 28 
March 29
West Chicago*
July 21
August 23
April 4
May 3 
Wheeling
October 5
November 5
April 11
May 10 
Worth
August 24 
September 24
April 26
May 26 

* 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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