Accessing Assessor's Office Services
The Assessor's Office is committed to the health and safety of Cook County residents as we continue to provide services by phone, by mail, online (by email and social media), and in person (appointment and mask required).
A appointment is required for any in-person visits to the Cook County Assessor's Office.
Please read the following for how to receive assistance via our website, email, phone, or in-office appointment.
The Assessor's Office can assist you with:
✔ Missing property tax exemptions on your second installment property tax bill
✔ Updating the property location address on your property tax bill
✔ Property assessment questions and appeals
✔ Finding properties that are comparable to yours
Some services require assistance from other Cook County offices:
- Pay a property tax bill at cookcountytreasurer.com
- Change your property tax bill mailing address at cookcountytreasurer.com
- Verify ownership of a piece of property, if a property has foreclosed, or if there is a lien on a property, with the Cook County Recorder of Deeds Office at 312-603-5050 or https://cookrecorder.com/
In the suburbs, you may be able to access services with your local township assessor.
Services offered online from the Cook County Assessor's Office:
Ask us questions:
Please have your property tax bill ready.
- Call us at (312) 443-7550 if you have specific questions or issues regarding your property tax bill.
- Send a message if you have specific questions or issues regarding your specific property tax bill. Please note replies via email may take up to 3-4 business days.
- Contact us on Facebook or Twitter if you have general questions about our office services.
Assisting someone without internet access?
- Call us at (312) 443-7550. We can mail forms and offer assistance over the phone. Please have your tax bill ready.
Assessor's Office staff will be available at our Downtown Chicago office, at select branch offices, and at the offices of our local government partners, all on an appointment-only basis.
We encourage taxpayers to access services online or by phone whenever possible. Before making an in-person appointment, please review our frequently asked questions for assistance.
- To visit us in person, you will be required to:
- have an appointment
- wear a mask and practice physical distancing
- answer health-related questions and undergo thermal screening
How often is my property reassessed?
Cook County is reassessed triennially, which means one-third of the county is reassessed each year. This year, the south suburbs will be reassessed. Your property may also be reassessed if there are significant changes due to a permit application, property division, demolition, or other special application.
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