Effective Monday, September 22, 2025, the Cook County Assessor’s Office located inside the Markham Courthouse will be closed for remodeling until further notice.

The mission of the Cook County Assessor’s Office is to deliver accurate and transparent assessments of all residential and commercial properties. We serve every community in the …

Dec 3, 2025 · The Cook County Property Tax Portal, created and maintained by the Cook County Treasurer’s Office, consolidates information from the elected officials who take part in the …

The Cook County Assessor is an elected government official who is responsible for establishing fair and accurate property assessments. Valuation of the county's 1.8 million parcels of …

- Select - 2-02: One story residence, any age, up to 999 square feet 2-03: One story residence, any age, 1,000 to 1,800 square feet 2-04: One story residence, any age, 1,801 square feet …

Nov 7, 2025 · The Cook County Property Tax Portal is the result of collaboration among the elected officials who take part in the property tax system; the Portal consolidates information …

Property Tax Exemptions Property tax exemptions are savings that contribute to lowering a homeowner’s property tax bill. The most common is the Homeowner Exemption, which saves …

Important: This site provides access to the Cook County Assessor’s Office property records database. To access the records, you can search by your Property Index Number (PIN) or by …

Learn more about exemptions administered by the Assessor's Office. Looking for property tax refunds? If you think you and your mortgage company both paid the taxes for the same …

Many services with the Cook County Assessor’s Office can be accessed from the comfort of home, for free.