<div class="body"><p>If a Cook County property owner feels they have an erroneous assessment, they have the right to file a formal complaint known as an appeal during a 30 day window.</p><p>Each property’s deadline is specific to its township. The start of the township appeal window begins with the mailing of the assessment notices and ends roughly 30 days later. These mailing dates are published at the beginning of the year and small adjustments are made throughout the year.</p><p>A taxpayer or representative must submit the appropriate documentation and evidence during this 30-day window for a township analyst to review the file for an adjustment.</p></div>