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).

Services with the CCAO can be accessed from home (by phone, email, or social media), or 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:

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:

Missing an exemption?

Property assessment appeals 

Find comparable properties

CCAO's COVID-19 Adjustments

Submit a FOIA Request  

Common property tax issues and solutions  

Informational Videos


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.

Do you require services in person?

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

Schedule appointment