For the 2025 property tax levy to be collected in Fiscal Year 2026/2027: The 2025 tax levy of $6,077,882 represents a 2.86% increase over the prior year’s final extended levy of $5,909,155.  This percentage increase is slightly below recent consumer price index data that shows inflation has increased approximately 2.91% for the nine months ending September 2025.  Using an estimated median residential home value in Oak Brook of $888,780, this 2.86% levy increase would result in an estimated $25.94 increase in the homeowner’s tax bill.