Property Tax Reassessments & Appeals
Every three years, the Cook County Assessor's Office reassesses 1.8 million parcels of Cook County property.
Property owners have the right to appeal these assessed values if they feel that their property has been overvalued compared to similar properties. You will never be penalized for filing an appeal, your assessments can only go down and it helps the Assessor's Office continue to process more accurate assessments.
Learn more about the appeals process below. To get answers to your questions, please contact our office for one-on-one assistance.
Assessor's Office Residential Property Appeal
Find Comparable Properties
Begin an appeal with the Board or Review
Board of Review Appeal Reminder
Board of Review Appeals Portal
Pre-file Board of Review Property Tax Appeals
Assessment Calendar and Deadlines
Property Tax Appeal Board (PTAB) Schedule
Property Tax Reassessments
Every three years, residential and commercial properties get re-assessed to determine their fair market value and the percentage of property taxes that should be paid by the owners.
Townships in North Suburbs, including Northfield Township, Wheeling Township and Palatine Township, were fully re-assessed in 2019. Residents have 30 days after their reassessment to appeal.
These 2019 property assessments are part of what will impact your property tax bill on your the second installment payments this year. Your assessments will not impact your appraisal and are not the same as the sale price of your home. We won’t know what impact your assessments have on the property tax bill until local levies are set for 2020.
Northfield Township: Residential Assessment Report | Residential Assessment Map| Commercial/Industrial Assessment Report
Palatine Township: Residential Assessment Report | Residential Assessment Map| Commercial/Industrial Assessment Report
Wheeling Township: Residential Assessment Report | Residential Assessment Map| Commercial/Industrial Assessment Report
The following dates where when each Township was re-assessed:
Northfield Township -- May 24, 2019
Wheeling Township -- July 8, 2019
Palatine Township -- August 2, 2019
These townships will be up for re-assessment in 2022.
Appealing Property Tax Assessments with the
Cook County Assessor's Office
Following the re-assessment of each property in a Township, property owners have 30 days to submit an appeal form to the Assessor’s Office. It is important to file an appeal for every assessment period. You will never be penalized, your assessments can only go down and it helps the Assessor's Office continue to process more accurate assessments.
Forms can be filed with the Cook County Assessor's Office online, dropped off at their downtown office or delivered via the mail.
In order to file an appeal, constituents must provide comparable properties. This can be done via the Cook County Assessor's website, by appointment with your township assessor or by contacting our office.
The following dates were open for residents to file an appeal with the Assessor's Office:
Palatine Township -- June 16, 2021 to July 16, 2021
Wheeling Township -- May 14, 2020 to June 19, 2020
Northfield Township -- July 23, 2020 to August 28, 2020
Appealing Property Tax Assessments with the
Cook County Board of Review
In addition to appealing with the Cook County Assessor's Office, property owners may also submit an appeal with the Cook County Board of Review. The Board of Review is a quasi-judicial office, consisting of three elected Commissioners that work independently of the Assessor's Office to impartially review and prepare evidence for property tax assessment appeal cases. Completed appeals are presented to all three Commissioners who together make a final determination.
Residents may file a property tax appeals with the Board of Review every year. You will never be penalized, your assessments can only go down and it helps the Assessor's Office continue to process more accurate assessments. During the Board of Review appeal, property owners may contest their assessments based on comparable properties, factual errors in the description of property characteristics, damage caused by natural disaster or demolition, and recent purchase price among other criteria.
Forms can be filed with the Cook County Board of Review online, dropped off at their downtown office or delivered via the mail.
File an appeal with the Board of Review:
The Board of Review also reviews property tax appeals from property owners on a rolling basis by Township.
The Board of Review accepts pre-registration requests for all townships. Pre-registration allows taxpayers to be notified by the Board of Review of the opening and closing filing periods for their respective townships.
Property owners (Non-Attorneys) are also welcome to Pre-file their Board of Review appeals, which allows filers to submit their appeal before each township officially opens. The Pre-file period will end once the respective township is open.
The full schedule will be posted following the opening of the Board of Review appeal filing period. All appeals must be submitted before the township closing dates.