The Illinois systems for appealing property assessments provides several opportunities for taxpayers to have incorrect or inaccurate assessments corrected. These options include:

An Informal Appeal at the Township Assessor Level: If you believe that there is an error or discrepency in the information about your property that effects the assessment amount, please contact your Assessor. Calling attention to an error early allows for adjustments to be made quickly and without using the formal appeal process. This process could involve a visit from your Deputy Assessors to measure or verify the information provided.

A Formal Appeal to the County Board of Review: If you have already spoken with the Township Assessor and still believe that your property is not valued correctly, you may file a formal complaint to the County Board of Review. A Formal Complaint can only be filed within 30 days of assessments being published.  Assessments for 2022 were published on August 3, 2022. For more information about filing an appeal, please see our frequenty asked questions. For more information about the Winnebago County Board of Review, visit the website here.

Appeal to the Illinois Property Tax Appeal Board: If you are still unsatisfied with your assessed value AFTER filing a formal appeal to the Board of Review, you can appeal the assessment to the State Property Tax Appeal Board. Your PTAB must be filed within 30 days of your Board of Review decision date. For more information, please visit the website here.


Rockford Township Assessor's Office
401 West State Street, Suite 100
Rockford, Illinois 61101

T: (815) 965-0300
F: (815) 965-8968

office hours

Monday through Friday
8:00 am - 4:30 pm