Knox County, IL · Knox County
2026 Commercial or Industrial Assessment Appeal
Property owners or taxpayers of record use this form to appeal the assessment of commercial or industrial property to the Knox County Board of Review.
At a glance
- Issued by
- City of Knox County · Knox County, Knox County, Illinois
- Notarization
- Not required: file this form without a notary.
- Official source
- knoxcountyil.gov
- Blank form
- Download the PDF
- Catalogued
- Machine-readable
- JSON record · about the forms index
What this form is
This form lets a property owner or taxpayer of record explain why a commercial or industrial property assessment should be reviewed and state a requested value. The form asks for property identification, appeal reasons, assessment details, and comparable property information. The Board of Review requires the form and supporting evidence by October 19, 2026; the document recommends discussing the assessment with the township assessor before filing.
Who needs it
A property owner or taxpayer of record who wants to challenge a commercial or industrial property assessment files this form.
How to submit it
File one set of the completed form and supporting documents with the Knox County Board of Review, 121 S Prairie Street, Suite 1, Galesburg, IL 61401. The form states an October 19, 2026 filing deadline.
About notarization
The complaint form is signed and dated without a notary; an attorney’s written authorization or power of attorney must be notarized.
How to submit this form
- 1
Download the Appeal Form
Download the 2026 Commercial or Industrial Assessment Appeal form.
- 2
Complete the Form
Provide property identification, appeal reasons, assessment information, comparable details, and the required signature and date.
- 3
Gather Supporting Documents
Include one set of supporting evidence with the form. The instructions give examples such as appraisals, sales contracts, and property photographs.
- 4
Submit to the Board of Review
File one set of the form and supporting documents with the Knox County Board of Review at the address stated on the form.
Frequently asked questions
- Do I need a notary for the 2026 Commercial or Industrial Assessment Appeal?
- No. The complaint form is signed and dated without a notary. If an attorney represents the owner or taxpayer, the written authorization or power of attorney must be notarized.
- Who can file this assessment appeal?
- The document says only the property owner or taxpayer of record may file a complaint. They may designate an attorney by submitting written authorization with the complaint.
- How do I submit the appeal?
- File one set of the completed form and all supporting documents with the Knox County Board of Review at 121 S Prairie Street, Suite 1, Galesburg, IL 61401.
- What supporting information does the form request?
- The form asks for property and assessment details, reasons for the complaint, and comparable property information. The instructions call for supporting evidence to be filed with the form.