office of the Cook County Assessor

The Office of the Cook County Assessor is responsible for determining the value of all real estate properties within Cook County, Illinois. This assessed value is used to calculate property taxes, ensuring they are fair and based on current market conditions. The office conducts property assessments, maintains property records, and responds to property owner inquiries. Its goal is to provide an accurate and equitable system for distributing property tax burden, supporting local government services such as schools, public safety, and infrastructure.