Assessment Calendar and Deadlines

Last updated: 2/3/2023

As townships are certified by the Board of Review for the 2021 assessment calendar below, they will be noted in the Pass column. Only rows with the words BOR Final are currently available on the CCAO website and data subscription service. 

A plus symbol (+) in that column indicates the appeals have been completed by the Board of Review but data is not yet available on the CCAO website or the data subscription service due to the need to transfer the data from the mainframe used by the Board into the new, modern assessment system of record used by the CCAO. Updates will be made as new township data is available.

2022 Assessment Calendar: North Suburbs

Dates will be published as Reassessment Notices are mailed, when townships are open for appeals, and as values are certified for north suburban townships listed below.

Our phone lines remain open to the public during normal business hours and assistance is available via our website and social media channels.

Notices are mailed out and appeals open after 6 pm on the date listed for each township. Note that values may take an additional business day to update online from the mail date.

TownshipReassessment Notice Mail DateLast Day to File CCAO Appeal Assessment Roll CertifiedAssessment Roll Published*Board of Review Appeal DatesPass
Norwood Park7/1/20228/2/202211/10/202211/24/202211/28/2022 - 12/27/20222
Barrington7/8/20228/8/202211/18/202212/1/202212/12/2022 - 1/10/20232
Hanover7/8/20228/8/202211/29/202212/8/202212/12/2022 - 1/10/20232
New Trier7/19/20228/19/202212/13/202212/22/202212/27/2022 - 1/25/20232
Schaumburg7/25/20228/25/202212/16/202212/22/202212/27/2022 - 1/25/20232
Elk Grove8/1/20229/1/20221/5/20231/12/20231/19/2023 - 2/17/20232
Evanston8/8/20229/9/20221/5/20231/19/20231/19/2023 - 2/17/20232
Palatine8/22/20229/23/20221/20/20232/2/2023 1
Maine9/07/202210/7/20221/17/20231/26/2023 2
Leyden9/16/202210/17/20221/20/20232/2/2023 1
Northfield10/03/202211/03/2022   1
Wheeling10/10/202211/10/2022   1
Niles11/1/202212/2/2022   1

* Once assessment rolls are certified, the information is made available online and to all offices of the Cook County property tax system. By law, the assessment roll must also be published in a print newspaper. The "published" date refers to when the information will be available in the newspaper.

2022 Assessment Calendar: South/West Suburbs and City of Chicago

In the City of Chicago and South / West Suburban townships, individual properties will only be reassessed only if there is a change due to division work, permit applications, or other special applications.

Note that values may take an additional business day to update online from the mail date.

TownshipReassessment Notice Mail DateLast Day to File CCAO Appeal Assessment Roll CertifiedAssessment Roll Published*Board of Review appeal datesPass
Riverside6/21/20227/22/202211/9/202211/17/202211/21/2022 - 12/20/20222
River Forest6/21/20227/22/202211/9/202211/24/202211/28/2022 - 12/27/20222
Oak Park6/22/20227/25/202211/9/202211/16/202211/21/2022 - 12/20/20222
Calumet6/22/20227/25/202211/10/202211/16/202211/21/2022 - 12/20/20222
Cicero6/22/20227/25/202211/10/202211/17/202211/21/2022 - 12/20/20222
Berwyn6/22/20227/25/202211/9/202211/17/202211/21/2022 - 12/20/20222
Lemont7/6/20228/8/202211/18/202211/25/202211/28/2022 - 12/27/20222
Orland7/13/20228/15/202211/28/202212/8/202212/12/2022 - 1/10/20232
Rogers Park7/20/20228/22/202212/6/2022**12/14/202212/27/2022 - 1/25/20232
Bloom7/29/20228/29/20221/5/20231/11/20231/19/2023 - 2/17/20232
Bremen8/5/20229/6/20221/6/20231/18/2023 2
Thornton8/17/20229/19/20221/5/20231/12/20231/19/2023 - 2/17/2022
West Chicago 10/12/202211/14/20221/26/20232/2/2023 2
Palos9/2/202210/3/20221/5/20231/12/20231/19/2023 - 2/17/20232
Lake View10/24/202211/25/20222/3/20232/15/2023 2
Rich10/28/202211/29/20221/12/20231/26/2023 2
Hyde Park11/2/202212/5/2022   1
Jefferson11/10/202212/12/2022   1
Stickney11/10/202212/12/20221/12/20231/26/2023 2
Lake11/25/202212/27/2022   1
Lyons11/21/202212/22/2022   1
North12/02/20221/04/2023   1
Proviso11/30/20221/3/20232/3/20232/15/2023 2
Worth11/23/202212/24/2022   1
South12/02/20221/04/2023   1

* Once assessment rolls are certified, the information is made available online and to all offices of the Cook County property tax system. By law, the assessment roll must also be published in a print newspaper. The "published" date refers to when the information will be available in the newspaper.

** Updated

2021 Assessment Calendar: City of Chicago

As townships are certified by the Board of Review for the 2021 assessment calendar below, they will be noted in the Pass column. Only rows with the words BOR Final are currently available on the CCAO website and data subscription service. 

A plus symbol (+) in that column indicates the appeals have been completed by the Board of Review but data is not yet available on the CCAO website or the data subscription service due to the need to transfer the data from the mainframe used by the Board into the new, modern assessment system of record used by the CCAO. Updates will be made as new township data is available.

The 2021 assessment and appeal schedule coincides with the implementation of iasWorld, a new integrated property tax system. This upgrade moves us from an aging mainframe system onto a state-of-the-art platform that allows property owners to easily access and update property data. Therefore, assessment mailing dates and appeal dates are subject to change. Please plan accordingly. Information will be published as it becomes available.

As new townships are certified, those dates will be published below.

Our phone lines remain open to the public during normal business hours and assistance is available via our website and social media channels.


Note that values may take 24 hours to update online from the mail / certified date. Result letters will be sent in the mail or sent to practitioners via GovQA in a few days after certification.

TownshipReassessment Notice Mail DateLast Day to File CCAO Appeal Date A-Roll CertifiedDate A-Roll PublishedBoard of Review appeal datesPass
Rogers Park6/15/2021 7/19/20211/28/20222/3/20222/14/2022 - 3/15/2022BOR Final
West Chicago7/21/20218/23/20213/21/20223/31/20224/4/2022 - 5/3/2022BOR Final
Jefferson8/16/20219/17/20214/12/20224/23/20225/2/2022 - 5/31/2022BOR Final
North9/17/202110/19/20214/7/20224/20/224/26/2022 - 5/25/2022BOR Final
South9/30/202111/1/20214/11/20224/23/20224/26/2022 - 5/25/2022BOR Final
Lake11/4/202112/6/20214/12/20224/20/20224/26/2022 - 5/25/2022BOR Final
Lake View11/22/202112/23/20213/29/20224/6/20224/11/2022 - 5/10/2022BOR Final
Hyde Park12/15/20211/21/20224/1/20224/7/20224/11/2022 - 5/10/2022BOR Final


2021 Assessment Calendar: Suburbs (North, South, and West)

In the North Suburban and South and West Suburban townships, individual properties will only be reassessed only if there is a change due to division work, permit applications, or other special applications.

Note that values may take 24 hours to update online from the mail date.

As townships are certified by the Board of Review for the 2021 assessment calendar below, they will be noted in the Pass column. Only rows with the words BOR Final are currently available on the CCAO website and data subscription service. 

A plus symbol (+) in that column indicates appeals have been completed by the Board of Review but data is not yet available on the CCAO website or the data subscription service due to the need to transfer the data from the mainframe used by the Board into the new, modern assessment system of record used by the CCAO. Updates will be made as new township data is available.

TownshipReassessment Notice Mail DateLast Day to File CCAO Appeal Date A-Roll CertifiedDate A-Roll PublishedBoard of Review Appeal DatesPass
River Forest4/21/20215/21/202111/15/202112/02/202112/06/2021 - 1/04/2022BOR Final
Riverside4/22/20215/22/202111/16/202112/02/202112/06/2021 - 1/04/2022BOR Final
Evanston5/7/20216/7/20211/28/20222/10/202202/14/2022 - 3/15/2022BOR Final
Oak Park5/17/20216/16/202111/24/202112/01/202112/06/2021 - 1/04/2022BOR Final
Norwood Park5/17/20216/16/202111/17/202112/02/202112/06/2021 - 1/04/2022BOR Final
Berwyn6/1/20217/1/202112/20/202112/23/20211/03/2022 - 2/01/2022BOR Final
New Trier6/1/20217/1/202112/20/202112/30/20211/03/2022 - 2/01/2022BOR Final
Cicero6/8/20217/9/202112/13/202112/16/202112/22/2021 - 1/20/2022BOR Final
Palatine6/14/20217/16/202112/30/20211/06/20222/14/2022 - 3/15/2022BOR Final
Schaumburg6/16/20217/19/202112/23/202112/30/20211/03/2022 - 2/01/2022BOR Final
Elk Grove6/28/20217/29/20212/7/20222/10/20222/14/2022 - 3/15/2022BOR Final
Orland7/2/20218/3/20211/28/20222/2/20222/14/2022 - 3/15/2022BOR Final
Calumet7/2/20218/3/202112/13/202112/15/202112/22/2021 - 1/20/2022BOR Final
Hanover7/14/20218/16/202112/23/202112/30/20211/03/2022 - 2/01/2022BOR Final
Barrington7/14/20218/16/202112/10/202112/16/202112/22/2021 - 1/20/2022BOR Final
Bloom7/23/20218/23/20212/17/20222/23/20222/28/2022 - 3/29/2022BOR Final
Maine7/23/20218/23/20213/18/20223/24/20223/28/2022 - 4/26/2022BOR Final
Thornton8/9/20219/9/20212/17/20222/24/20222/28/2022 - 3/29/2022BOR Final
Palos8/12/20219/13/20213/16/20223/24/20223/28/2022 - 4/26/2022BOR Final
Lemont8/14/20219/14/20212/7/20222/11/20222/14/2022 - 3/15/2022BOR Final
Worth8/24/20219/24/20214/8/20224/21/20224/26/2022 - 5/25/2022BOR Final
Leyden8/30/20219/30/20213/21/20223/31/20224/4/2022 - 5/3/2022BOR Final
Northfield9/3/202110/04/20213/28/20224/7/20224/11/2022 - 5/10/2022BOR Final
Bremen9/15/202110/18/20212/11/20222/16/202202/28/2022 - 03/29/2022BOR Final
Lyons9/21/202110/25/20214/12/20224/20/20224/26/2022 - 5/25/2022BOR Final
Wheeling10/05/202111/05/20214/1/20224/7/20224/11/2022 - 5/10/2022BOR Final
Proviso10/08/202111/08/20214/8/20224/20/20225/2/2022 - 5/31/2022BOR Final
Stickney10/14/202111/29/20214/6/20224/21/20225/2/2022 - 5/31/2022BOR Final
Rich 10/26/202111/29/20214/5/20224/20/20225/2/2022 - 5/31/2022BOR Final
Niles11/1/202112/03/20214/5/20224/21/20225/2/2022 - 5/31/2022BOR Final

 

As townships are certified by the Board of Review for the 2021 assessment calendar below, they will be noted in the Pass column. Only rows with the words BOR Final are currently available on the CCAO website and data subscription service. 

A plus symbol (+) in that column indicates appeals have been completed by the Board of Review but data is not yet available on the CCAO website or the data subscription service due to the need to transfer the data from the mainframe used by the Board into the new, modern assessment system of record used by the CCAO. Updates will be made as new township data is available.

Past Calendars:

2020 Assessment Calendar and Deadlines

2019 Assessment Calendar and Deadlines

2018 Assessment Calendar and Deadlines 

Other relevant information:

2022 CCAO Appeal Rules
2022 Practitioners Meeting Presentation Slides >> and Video >>
Commercial real estate participants: Market Analyst Day Presentations
Submit RPIE valuations data