Property Tax in Grundy County
via TaxByCounty
Grundy County taxes significantly above U.S.
Grundy County's 2.029% effective tax rate ranks in the 68th percentile nationally, well above the U.S. median of 1.562%. However, Grundy homes are worth far more than most—the median $259,200 home value nearly matches the national median of $281,900—resulting in a $5,260 annual tax that exceeds the national median by 96%.
Moderately high for Illinois
Illinois averages 1.831%, and Grundy County's 2.029% rate runs 0.198 percentage points higher, placing it in the upper tier of state counties. With a median tax of $5,260, Grundy residents pay 89% more than the state median of $2,782, driven largely by significantly higher home values.
Most valuable homes in region
Grundy County's $259,200 median home value far exceeds neighboring Franklin ($87,700), Gallatin ($84,700), and Fayette ($114,700), explaining its higher tax bill. Though its 2.029% rate is lower than Fulton (2.133%) and only slightly higher than Ford (2.069%), Grundy's higher property values result in the region's largest median annual tax of $5,260.
What your home costs to own
Grundy County homeowners pay $5,260 annually in property taxes on the median home—by far the highest in this survey, reflecting valuable suburban properties. With a mortgage, that climbs to $5,754; over 30 years, this county costs $157,800 in property taxes alone, a significant expense despite moderate tax rates.
High-value homes warrant appeal review
Given Grundy County's high property values and resulting large tax bills, assessment overages compound quickly—potentially costing thousands if inflated. Hiring an assessment attorney or appraiser to challenge a questionable assessment could save thousands annually, paying for itself within a year or two.