2026 Appeal Windows — Cook County

Appeal Schedule & Deadlines

Official Assessor last-file and Board of Review complaint-close dates for all 38 Cook County townships.

BOR Group 1 BOR Filing 7/7/25–8/5/25 · Re-Review 2/3/26 – 2/5/26 · 6 townships
Township	Reassess YR	Period	Triennial	Assessor Filing	Status	BOR Filing	Evidence Deadline	Hearings	Re-Review Window	Status
Berwyn	2023	2023–2025	South	3/25/25 – 5/6/25	Closed	7/7/25 – 8/5/25 12/3/25 – 12/12/25	8/15/25 12/22/25	9/15/25 – 9/17/25 1/22/26 – 1/23/26	2/3/26 – 2/5/26	Closed
Evanston	2025	2025–2027	North	4/9/25 – 5/21/25	Closed	7/7/25 – 8/5/25 12/3/25 – 12/12/25	8/15/25 12/22/25	9/15/25 – 9/17/25 1/22/26 – 1/23/26	2/3/26 – 2/5/26	Closed
Norwood Park	2025	2025–2027	North	3/24/25 – 5/5/25	Closed	7/7/25 – 8/5/25 12/3/25 – 12/12/25	8/15/25 12/22/25	9/15/25 – 9/17/25 1/22/26 – 1/23/26	2/3/26 – 2/5/26	Closed
River Forest	2023	2023–2025	South	3/7/25 – 4/18/25	Closed	7/7/25 – 8/5/25 12/3/25 – 12/12/25	8/15/25 12/22/25	9/15/25 – 9/17/25 1/22/26 – 1/23/26	2/3/26 – 2/5/26	Closed
Riverside	2023	2023–2025	South	3/7/25 – 4/18/25	Closed	7/7/25 – 8/5/25 12/3/25 – 12/12/25	8/15/25 12/22/25	9/15/25 – 9/17/25 1/22/26 – 1/23/26	2/3/26 – 2/5/26	Closed
Rogers Park	2024	2024–2026	City	3/12/25 – 4/23/25	Closed	7/7/25 – 8/5/25 12/3/25 – 12/12/25	8/15/25 12/22/25	9/15/25 – 9/17/25 1/22/26 – 1/23/26	2/3/26 – 2/5/26	Closed
BOR Group 2a BOR Filing 7/21/25–8/19/25 · Re-Review 2/9/26 – 2/11/26 · 3 townships
Township	Reassess YR	Period	Triennial	Assessor Filing	Status	BOR Filing	Evidence Deadline	Hearings	Re-Review Window	Status
Cicero	2023	2023–2025	South	4/24/25 – 6/6/25	Closed	7/21/25 – 8/19/25 12/3/25 – 12/12/25	8/29/25 12/22/25	10/20/25 – 10/23/25 1/22/26 – 1/23/26	2/9/26 – 2/11/26	Closed
Oak Park	2023	2023–2025	South	4/8/25 – 5/20/25	Closed	7/21/25 – 8/19/25 12/3/25 – 12/12/25	8/29/25 12/22/25	10/20/25 – 10/23/25 1/22/26 – 1/23/26	2/9/26 – 2/11/26	Closed
Palos	2023	2023–2025	South	4/19/25 – 6/2/25	Closed	7/21/25 – 8/19/25 12/3/25 – 12/12/25	8/29/25 12/22/25	10/20/25 – 10/23/25 1/22/26 – 1/23/26	2/9/26 – 2/11/26	Closed
BOR Group 2b BOR Filing 8/18/25–9/16/25 · Re-Review 2/9/26 – 2/11/26 · 4 townships
Township	Reassess YR	Period	Triennial	Assessor Filing	Status	BOR Filing	Evidence Deadline	Hearings	Re-Review Window	Status
Elk Grove	2025	2025–2027	North	5/6/25 – 6/18/25	Closed	8/18/25 – 9/16/25 12/3/25 – 12/12/25	9/26/25 12/22/25	10/20/25 – 10/23/25 1/22/26 – 1/23/26	2/9/26 – 2/11/26	Closed
Lake View	2024	2024–2026	City	5/23/25 – 7/9/25	Closed	8/18/25 – 9/16/25 12/3/25 – 12/12/25	9/26/25 12/22/25	10/20/25 – 10/23/25 1/22/26 – 1/23/26	2/9/26 – 2/11/26	Closed
Lyons	2023	2023–2025	South	6/2/25 – 7/16/25	Closed	8/18/25 – 9/16/25 12/3/25 – 12/12/25	9/26/25 12/22/25	10/20/25 – 10/23/25 1/22/26 – 1/23/26	2/9/26 – 2/11/26	Closed
New Trier	2025	2025–2027	North	4/23/25 – 6/5/25	Closed	8/18/25 – 9/16/25 12/3/25 – 12/12/25	9/26/25 12/22/25	10/20/25 – 10/23/25 1/22/26 – 1/23/26	2/9/26 – 2/11/26	Closed
BOR Group 3 BOR Filing 9/22/25–10/21/25 · Re-Review 2/18/26 – 2/20/26 · 5 townships
Township	Reassess YR	Period	Triennial	Assessor Filing	Status	BOR Filing	Evidence Deadline	Hearings	Re-Review Window	Status
Barrington	2025	2025–2027	North	7/3/25 – 8/15/25	Closed	9/22/25 – 10/21/25 12/3/25 – 12/12/25	10/31/25 12/22/25	12/8/25 – 12/18/25 1/22/26 – 1/23/26	2/18/26 – 2/20/26	Closed
Maine	2025	2025–2027	North	6/4/25 – 7/18/25	Closed	9/22/25 – 10/21/25 12/3/25 – 12/12/25	10/31/25 12/22/25	12/8/25 – 12/18/25 1/22/26 – 1/23/26	2/18/26 – 2/20/26	Closed
Northfield	2025	2025–2027	North	6/17/25 – 7/31/25	Closed	9/22/25 – 10/21/25 12/3/25 – 12/12/25	10/31/25 12/22/25	12/8/25 – 12/18/25 1/22/26 – 1/23/26	2/18/26 – 2/20/26	Closed
Stickney	2023	2023–2025	South	6/11/25 – 7/25/25	Closed	9/22/25 – 10/21/25 12/3/25 – 12/12/25	10/31/25 12/22/25	12/8/25 – 12/18/25 1/22/26 – 1/23/26	2/18/26 – 2/20/26	Closed
West Chicago	2024	2024–2026	City	7/9/25 – 8/20/25	Closed	9/22/25 – 10/21/25 12/3/25 – 12/12/25	10/31/25 12/22/25	12/8/25 – 12/18/25 1/22/26 – 1/23/26	2/18/26 – 2/20/26	Closed
BOR Group 4 BOR Filing 10/23/25–11/21/25 · Re-Review 3/17/26 – 3/19/26 · 6 townships
Township	Reassess YR	Period	Triennial	Assessor Filing	Status	BOR Filing	Evidence Deadline	Hearings	Re-Review Window	Status
Bremen	2023	2023–2025	South	7/10/25 – 8/21/25	Closed	10/23/25 – 11/21/25 12/3/25 – 12/12/25	12/1/25 12/22/25	2/23/26 – 2/26/26	3/17/26 – 3/19/26	Closed
Calumet	2023	2023–2025	South	7/30/25 – 9/11/25	Closed	10/23/25 – 11/21/25 12/3/25 – 12/12/25	12/1/25 12/22/25	2/23/26 – 2/26/26	3/17/26 – 3/19/26	Closed
Hyde Park	2024	2024–2026	City	8/4/25 – 9/16/25	Closed	10/23/25 – 11/21/25 12/3/25 – 12/12/25	12/1/25 12/22/25	2/23/26 – 2/26/26	3/17/26 – 3/19/26	Closed
Lemont	2023	2023–2025	South	7/21/25 – 9/2/25	Closed	10/23/25 – 11/21/25 12/3/25 – 12/12/25	12/1/25 12/22/25	2/23/26 – 2/26/26	3/17/26 – 3/19/26	Closed
Leyden	2025	2025–2027	North	7/21/25 – 9/2/25	Closed	10/23/25 – 11/21/25 12/3/25 – 12/12/25	12/1/25 12/22/25	2/23/26 – 2/26/26	3/17/26 – 3/19/26	Closed
Worth	2023	2023–2025	South	8/11/25 – 9/23/25	Closed	10/23/25 – 11/21/25 12/3/25 – 12/12/25	12/1/25 12/22/25	2/23/26 – 2/26/26	3/17/26 – 3/19/26	Closed
BOR Group 5 BOR Filing 11/20/25–12/19/25 · Re-Review 4/13/26 – 4/15/26 · 3 townships
Township	Reassess YR	Period	Triennial	Assessor Filing	Status	BOR Filing	Evidence Deadline	Hearings	Re-Review Window	Status
Jefferson	2024	2024–2026	City	8/21/25 – 10/3/25	Closed	11/20/25 – 12/19/25	12/29/25	3/23/26 – 3/26/26	4/13/26 – 4/15/26	Closed
Proviso	2023	2023–2025	South	8/25/25 – 10/7/25	Closed	11/20/25 – 12/19/25	12/29/25	3/23/26 – 3/26/26	4/13/26 – 4/15/26	Closed
Wheeling	2025	2025–2027	North	8/18/25 – 9/30/25	Closed	11/20/25 – 12/19/25	12/29/25	3/23/26 – 3/26/26	4/13/26 – 4/15/26	Closed
BOR Group 6 BOR Filing 1/5/26–2/3/26 · Re-Review TBD · 5 townships
Township	Reassess YR	Period	Triennial	Assessor Filing	Status	BOR Filing	Evidence Deadline	Hearings	Re-Review Window	Status
Lake	2024	2024–2026	City	9/22/25 – 11/4/25	Closed	1/5/26 – 2/3/26	2/13/26	4/20/26 – 4/23/26	TBD	Closed
Orland	2023	2023–2025	South	9/10/25 – 10/23/25	Closed	1/5/26 – 2/3/26	2/13/26	4/20/26 – 4/23/26	TBD	Closed
Palatine	2025	2025–2027	North	9/9/25 – 10/22/25	Closed	1/5/26 – 2/3/26	2/13/26	4/20/26 – 4/23/26	TBD	Closed
Schaumburg	2025	2025–2027	North	10/2/25 – 11/17/25	Closed	1/5/26 – 2/3/26	2/13/26	4/20/26 – 4/23/26	TBD	Closed
Thornton	2023	2023–2025	South	10/1/25 – 11/14/25	Closed	1/5/26 – 2/3/26	2/13/26	4/20/26 – 4/23/26	TBD	Closed
BOR Group 7 BOR Filing 1/20/26–2/18/26 · Re-Review TBD · 6 townships
Township	Reassess YR	Period	Triennial	Assessor Filing	Status	BOR Filing	Evidence Deadline	Hearings	Re-Review Window	Status
Bloom	2023	2023–2025	South	10/24/25 – 12/9/25	Closed	1/20/26 – 2/18/26	2/28/26	TBD	TBD	Closed
Hanover	2025	2025–2027	North	11/6/25 – 12/22/25	Closed	1/20/26 – 2/18/26	2/28/26	TBD	TBD	Closed
Niles	2025	2025–2027	North	10/22/25 – 12/5/25	Closed	1/20/26 – 2/18/26	2/28/26	TBD	TBD	Closed
North Chicago	2024	2024–2026	City	10/7/25 – 11/20/25	Closed	1/20/26 – 2/18/26	2/28/26	TBD	TBD	Closed
Rich	2023	2023–2025	South	10/21/25 – 12/4/25	Closed	1/20/26 – 2/18/26	2/28/26	TBD	TBD	Closed
South Chicago	2024	2024–2026	City	10/15/25 – 11/28/25	Closed	1/20/26 – 2/18/26	2/28/26	TBD	TBD	Closed

Open now

BOR Group 2through Tue 9/29Berwyn, Cicero, Elk Grove, Lake View, Maine, Palos

AssessorBarrington · Wed 9/23

AssessorBremen · Thu 9/24

AssessorLemont · Tue 9/29

AssessorCalumet · Fri 10/2

AssessorHyde Park · Thu 10/8

AssessorLeyden · Wed 10/14

AssessorWorth · Thu 10/15

AssessorWheeling · Thu 10/22

Township	Assessor/BOR last date to file	Assessor status	BOR status	Reassess?
Stickney	Assessor (Closed): 8/12/26	Closed	Pre-File	Yes
West Chicago	Assessor (Closed): 8/21/26	Closed	Pre-File	No
Evanston	BOR (Closed): 9/1/26Assessor (Closed): 6/4/26	Closed	Closed	No
New Trier	BOR (Closed): 9/1/26Assessor (Closed): 6/22/26	Closed	Closed	No
Norwood Park	BOR (Closed): 9/1/26Assessor (Closed): 5/26/26	Closed	Closed	No
Oak Park	BOR (Closed): 9/1/26Assessor (Closed): 6/18/26	Closed	Closed	Yes
River Forest	BOR (Closed): 9/1/26Assessor (Closed): 6/2/26	Closed	Closed	Yes
Riverside	BOR (Closed): 9/1/26Assessor (Closed): 6/8/26	Closed	Closed	Yes
Rogers Park	BOR (Closed): 9/1/26Assessor (Closed): 6/1/26	Closed	Closed	No
Lyons	Assessor (Closed): 9/3/26	Closed	Pre-File	Yes
Northfield	Assessor (Closed): 9/4/26	Closed	Pre-File	No
Barrington	Assessor: 9/23/26	Assessor Open	Pre-File	No
Bremen	Assessor: 9/24/26	Assessor Open	Pre-File	Yes
Berwyn	BOR: 9/29/26Assessor (Closed): 7/6/26	Closed	BOR Open	Yes
Cicero	BOR: 9/29/26Assessor (Closed): 7/31/26	Closed	BOR Open	Yes
Elk Grove	BOR: 9/29/26Assessor (Closed): 8/4/26	Closed	BOR Open	No
Lake View	BOR: 9/29/26Assessor (Closed): 7/13/26	Closed	BOR Open	No
Maine	BOR: 9/29/26Assessor (Closed): 7/21/26	Closed	BOR Open	No
Palos	BOR: 9/29/26Assessor (Closed): 7/17/26	Closed	BOR Open	Yes
Lemont	Assessor: 9/29/26	Assessor Open	Pre-File	Yes
Calumet	Assessor: 10/2/26	Assessor Open	Pre-File	Yes
Hyde Park	Assessor: 10/8/26	Assessor Open	Pre-File	No
Leyden	Assessor: 10/14/26	Assessor Open	Pre-File	No
Worth	Assessor: 10/15/26	Assessor Open	Pre-File	Yes
Wheeling	Assessor: 10/22/26	Assessor Open	Pre-File	No
Bloom	No date in current schedule	Pre-File	Pre-File	Yes
Hanover	No date in current schedule	Pre-File	Pre-File	No
Jefferson	No date in current schedule	Pre-File	Pre-File	No
Lake	No date in current schedule	Pre-File	Pre-File	No
Niles	No date in current schedule	Pre-File	Pre-File	No
North Chicago	No date in current schedule	Pre-File	Pre-File	No
Orland	No date in current schedule	Pre-File	Pre-File	Yes
Palatine	No date in current schedule	Pre-File	Pre-File	No
Proviso	No date in current schedule	Pre-File	Pre-File	Yes
Rich	No date in current schedule	Pre-File	Pre-File	Yes
Schaumburg	No date in current schedule	Pre-File	Pre-File	No
South Chicago	No date in current schedule	Pre-File	Pre-File	No
Thornton	No date in current schedule	Pre-File	Pre-File	Yes

Sources: Cook County Assessor calendar (updated 8/31/26) and the Board of Review 2026 township open-close PDF. Public dates are official Assessor last-file and BOR complaint-close only.

Appeal Schedule & Deadlines

September 2026

October 2026

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