McHenry County, IL
Home MenuFiling A Complaint
Complaint Forms, Instructions, and Guidelines to help with filing a Complaint.
When can Assessment Complaints be Filed with the County? What is the Deadline?
You must file within 30 days of the date of publication of the township. The links below can give the progress of the townships in McHenry County.
- Township Filing Deadlines
- 2025 Assessment Progress Report aka "Board of Review Status Report" This is a more detailed report.
Filing a Complaint Electronically:
(Please read instructions carefully)
The following documents may be helpful in the Complaint Process:
Ten steps to a Fair Assessment
Example of a Residential Complaint
After completing the Complaint, Grid(s) and saving to your computer, click the "SUBMIT YOUR COMPLAINT" link located on this page. Enter the required information. Be sure to enter your email address at the bottom of the screen and you will be sent a copy of your Complaint and evidence. Also, there are addition upload boxes available for more evidence and/or documentation in support of your complaint.
When sending photos as evidence, please be sure that the Property Index Numbers or addresses are labeled on each photo, a template is available for download. The Board should easily be able to identify images.
After sending the file you will receive a message that your Complaint was submitted.
Right click on the Complaint Form below that you wish to file, select "Save target/link as" or download the file to your computer. This will allow you to save the PDF form(s) to your computer. Complete the form(s) and save the file(s) to your computer. By downloading any of the following fillable forms, it will be assumed that the Board of Review rules have been reviewed by the individuals filing the complaint.
NOTE THAT A COMPLAINT FORM MUST BE SUBMITTED WITH A GRID, THESE ARE REQUIRED ITEMS.
- COMPLAINT FORMS TO BE AVAILABLE AT A LATER DATE.
(NOTE: REQUIRED DOCUMENTS ARE FOR YOUR SPECIFIC TYPE OF COMPLAINT, RESIDENTIAL, INDUSTRIAL, COMMERCIAL)
The following are supplemental forms and/or documents that could be helpful in providing the Board of Review additional information:
- Picture Templates
- Other Forms
- Authorization to Represent
- Note that every representative must submit this form or similar proof of authorization with the complaint. Failure to due so may result in a Dismissal.
- A complaint that is Dismissed can not be appealed to the State of Illinois Property Tax Appeal Board (PTAB).
- Vacancy Affidavit
- This form is to be completed when a Commercial Property, aka an Income Producing Property, is experiencing market induced vacancies.
- The Board of Review requests three years of financial reports to show the property's history.
- Authorization to Represent
To send your Complaint to McHenry County Board of Review, click the link below. Complaints can only be submitted using this portal. Electronic Complaints that are emailed will not be accepted by the Board of Review.
For assistance with this E-filing application, please contact our office during normal business hours (8:00 am to 4:30 pm central) at (815) 334-4290 or by e-mail at assessments@mchenrycountyil.gov
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