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.

Assessor and BOR Closed13

BOR Group 1Evanston, New Trier, Norwood Park, Oak Park, River Forest, Riverside, Rogers Park

BOR Group 2Berwyn, Cicero, Elk Grove, Lake View, Maine, Palos

Today0

None right now

Next 7 Days2

ProvisoTue 10/27

LakeThu 10/29

Next 14 Days6

PalatineWed 11/4

LyonsFri 11/6

NorthfieldFri 11/6

OrlandFri 11/6

StickneyFri 11/6

West ChicagoFri 11/6

Future8

JeffersonThu 11/12

BOR Group 3 EvidenceMon 11/16Lyons, Northfield, Stickney, West Chicago

SchaumburgThu 11/19

ThorntonMon 11/23

North ChicagoTue 11/24

NilesThu 12/3

RichFri 12/4

HanoverMon 12/7

Assessor Waiting to Open2

Bloom

South Chicago

Assessor Closed BOR Waiting8

Barrington

Bremen

Calumet

Hyde Park

Lemont

Leyden

Wheeling

Worth

Township	Assessor/BOR last date to file	Reassess?	Assessor status	BOR status	Group #	BOR Evidence deadline
Proviso	10/27/26	Yes	Assessor Open	Pre-File	—	—
Lake	10/29/26	No	Assessor Open	Pre-File	—	—
Palatine	11/4/26	No	Assessor Open	Pre-File	—	—
Lyons	11/6/26	Yes	Closed	BOR Open	3	11/16/26
Northfield	11/6/26	No	Closed	BOR Open	3	11/16/26
Stickney	11/6/26	Yes	Closed	BOR Open	3	11/16/26
West Chicago	11/6/26	No	Closed	BOR Open	3	11/16/26
Orland	11/6/26	Yes	Assessor Open	Pre-File	—	—
Jefferson	11/12/26	No	Assessor Open	Pre-File	—	—
Schaumburg	11/19/26	No	Assessor Open	Pre-File	—	—
Thornton	11/23/26	Yes	Assessor Open	Pre-File	—	—
North Chicago	11/24/26	No	Assessor Open	Pre-File	—	—
Niles	12/3/26	No	Assessor Open	Pre-File	—	—
Rich	12/4/26	Yes	Assessor Open	Pre-File	—	—
Hanover	12/7/26	No	Assessor Open	Pre-File	—	—
Barrington	9/23/26	No	Closed	Pre-File	—	—
Bremen	9/24/26	Yes	Closed	Pre-File	—	—
Lemont	9/29/26	Yes	Closed	Pre-File	—	—
Calumet	10/2/26	Yes	Closed	Pre-File	—	—
Hyde Park	10/8/26	No	Closed	Pre-File	—	—
Leyden	10/14/26	No	Closed	Pre-File	—	—
Worth	10/15/26	Yes	Closed	Pre-File	—	—
Wheeling	10/22/26	No	Closed	Pre-File	—	—
Bloom	Waiting for Assessor to Open	Yes	Pre-File	Pre-File	—	—
South Chicago	Waiting for Assessor to Open	No	Pre-File	Pre-File	—	—
Evanston	9/1/26	No	Closed	Closed	1	9/11/26
New Trier	9/1/26	No	Closed	Closed	1	9/11/26
Norwood Park	9/1/26	No	Closed	Closed	1	9/11/26
Oak Park	9/1/26	Yes	Closed	Closed	1	9/11/26
River Forest	9/1/26	Yes	Closed	Closed	1	9/11/26
Riverside	9/1/26	Yes	Closed	Closed	1	9/11/26
Rogers Park	9/1/26	No	Closed	Closed	1	9/11/26
Berwyn	9/29/26	Yes	Closed	Closed	2	10/9/26
Cicero	9/29/26	Yes	Closed	Closed	2	10/9/26
Elk Grove	9/29/26	No	Closed	Closed	2	10/9/26
Lake View	9/29/26	No	Closed	Closed	2	10/9/26
Maine	9/29/26	No	Closed	Closed	2	10/9/26
Palos	9/29/26	Yes	Closed	Closed	2	10/9/26

Sources: Cook County Assessor calendar (updated 10/22/26) and the Board of Review 2026 township open-close PDF. Public dates are official Assessor last-file, BOR complaint-close, and BOR evidence deadline only.

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

Appeal Schedule & Deadlines

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