How often are property assessments updated?

Asked 3 months ago
Property assessments in Cook County are typically updated on an annual basis. The Cook County Assessor's Office conducts these assessments to estimate the value of properties for tax purposes. It is important to note that not all properties are assessed every year; instead, assessments follow a cycle based on geographic areas within the county. Each township in Cook County is assessed every three years, ensuring that property values reflect current market conditions. In addition to these regular assessments, property owners may also request a reassessment if they believe their property's assessed value is inaccurate. The Cook County Assessor's Office provides information on the assessment process, including deadlines and requirements, on their official website. For the most accurate and up-to-date information regarding specific assessments and schedules, it may be beneficial to refer to the current web page of the Cook County Assessor's Office.
Jeff Whelpley is the editor / author responsible for this content.
Answered Aug 25, 2025

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