Cook County Property Tax Appeal Deadlines & Due Dates for 2018

Cook County Property Tax Assessment Calculator | KensingtonBelow is a listing of 2018 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 June 4 July 5 September 10 October 9
Berwyn March 1 April 2 August 1 August 30
Bloom September 6 October 9 Early January Late January
Bremen April 25 May 25 August 20 September 18
Calumet May 30 July 2 September 10 October 9
Cicero April 17 May 17 August 1 August 30
Elk Grove March 22 April 23 August 1 August 30
Evanston February 22 March 26 August 1 August 30
Hanover August 29 October 1 Early January Late January
Hyde Park June 19 July 19 October 15 November 13
Jefferson July 16 August 16 Mid-December Mid-January
Lake July 30 August 30 Mid-December Mid-January
Lake View May 7 June 7 October 15 November 13
Lemont June 4 July 5 September 10 October 9
Leyden June 28 July 30 October 15 November 13
Lyons May 14 June 14 September 10 October 9
Maine April 20 May 21 August 1 August 30
New Trier March 19 April 19 August 1 August 30
Niles August 28 September 28 Early January Late January
North Chicago September 5 October 5 Mid-December Mid-January
Northfield May 21 June 21 September 10 October 9
Norwood Park February 9 March 12 August 1 August 30
Oak Park March 1 April 2 August 1 August 30
Orland July 19 August 20 Early December Early January
Palatine August 1 September 4 Early August Late August
Palos April 3 May 3 August 1 August 30
Proviso July 17 August 17 Early December Early January
Rich September 4 October 4 Early January Late January
River Forest February 2 March 6 August 1 August 30
Riverside January 31 March 2 August 1 August 30
Rogers Park April 23 May 23 August 20 September 18
Schaumburg August 13 September 14 Early January Late January
South Chicago September 12 October 12 Mid-December Mid-January
Stickney May 22 June 22 September 10 October 9
Thornton August 10 September 11 Mid-December Mid-January
West Chicago August 24 September 25 Mid-November Mid-December
Wheeling July 17 August 17 Mid-November Mid-December
Worth June 21 July 23 October 15 November 13

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