Cook County Assessor's Office

Cook County Assessor's Office logo

Cook County Assessor's Office

Opening hours

Downtown Office: 118 N. Clark Street, Room 320 Chicago, IL 60602 Markham Office: 16501 S. Kedzie Ave. Markham, IL 60426 | Skokie Office: 5600 W. Old Orchard Rd., Room #149 Skokie, IL 60077
Chicago, Illinois,il
Our Booking Policy2024 applications will be available in March of 2025. Please use link below to apply for 2019 through 2023 missing exemptions.
https://propertytaxfilings.cookcountyil.gov/Filing/
Paper applications are available if needed in person for 2019-2023 year

Services & Locations

About

The Assessor's Office is responsible for setting fair and accurate values for 1.8 million parcels of Cook County property. The value of these properties is not determined on an individual basis, but rather by a mass appraisal system. The mass appraisal system is a way to put fairness into the entire assessment process.