Will County property tax appeal evidence checklist.

Will County evidence checklist

Start with the official property record, then add only the documents that support your selected appeal issue. A checklist prevents the packet from becoming a pile of unrelated frustration.

Keep copies of everything you submit, including portal confirmations, forms, attachments, emails, and date-stamped source pages.

• PIN, address, owner, current value, and requested value.
• Assessment notice, publication timing, or deadline source.
• Comparable sales or comparable assessments.
• Property-record correction proof.
• Condition, repair, appraisal, purchase, or exemption documents.

Market value packet

Use comparable sales, recent purchase documents, appraisals, and listings when the argument is that the property value is too high.

The packet should explain why each comparable is similar and how the set supports a specific requested value.

Record and condition packet

For record errors, include the official record screenshot and proof of the correct fact. For condition issues, include dated photos plus estimates, inspections, or other documents that show value impact.

Label documents by issue so the reviewer can connect them to the requested change.

Letter and filing packet

The appeal letter should be the summary, not the whole case. It should name the property, current value, requested value, reason, and attached evidence.

The official complaint form or portal still controls the filing. Use the letter as a supporting summary.

FAQ