At this time, we do not have a projected time for processing Certificates of Error related to property valuation, but rest assured our team is working to process them as soon as possible. If your Certificate of Error for valuation corrections has been approved and you are waiting for a refund, please check with the Cook County Treasurer’s Office for updates on timing of refunds. At this time, valuation Certificates of Error are not being refunded. Check this alert banner for regular updates.
Markham Branch Office Closure
Effective Monday, September 22, 2025, the Cook County Assessor’s Office located inside the Markham Courthouse will be closed for remodeling until further notice. For appointments or assistance, please visit our website to book at a nearby branch.
SKOKIE BRANCH OFFICE CLOSURE
Tuesday, December 16, 2025, the Cook County Assessor's Office located inside the Skokie Courthouse will be closed. Normal operations will resume on Wednesday, December 17, 2025.
