Kane County Property Tax Appeal, Illinois

Travis Bunn·Updated July 24, 2026

Kane County is Illinois's fifth-most populous county with approximately 516,522 residents as of the 2020 census, situated in the Chicago metropolitan area. The county seat is Geneva, with Aurora serving as the largest city, and other major population centers including Elgin, St. Charles, Batavia, and Carpentersville. Property tax appeals are particularly critical in Kane County, which ranks 32nd nationally for highest median property taxes and carries an effective tax rate of 2.09% to 2.60%, significantly higher than the national median of 1.02%. The median homeowner pays $5,112 to $7,219 annually in property taxes, substantially exceeding the national median of $2,400.

Notable cities: Geneva, Aurora, Elgin, St. Charles, Batavia, Carpentersville

Median Home

$245,000

Tax Rate

2.09%

Annual Tax

$5,112

Population

516,522

On the typical Kane County home, valued near $245,000 at the county’s effective tax rate of 2.09%, an over-assessment of even 10% means you are overpaying year after year until you appeal it. Here is how to find out if yours qualifies.

2026 Appeal Deadline: 30 calendar days after date of publication of the current year assessment list for your township

Kane County publishes township-specific assessment changes in local newspapers throughout the year, with filing deadlines varying by township. For 2026, deadlines range from July 9, 2026 (Dundee Township) to August 24, 2026 (Sugar Grove Township). The 30-day filing period begins from the date of publication, not the date you receive your notice. You must confirm your township's specific deadline on the Kane County Assessment Office website.

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Aerial view of an Illinois residential neighborhood. Kane County appeal guide.

How Kane County Assesses Property

33.33%of market value

Assessed by: Kane County Supervisor of Assessments and Township Assessors

Assessment cycle: annual

Notices typically mailed: Spring (typically by mid-May)

In Kane County, properties are assessed at 33.33% of their fair market value, as mandated by Illinois law. Each township assessor determines the market value of properties, and that value is then multiplied by the 33.33% assessment ratio to calculate your assessed value for tax purposes. For example, if your home's market value is $245,000, at Illinois's 33.33% assessment ratio your assessed value would be $81,667, resulting in approximately $1,707 in annual taxes at the county's effective rate of 2.09%.

The Appeal Process

Appeals are heard by the Board of Review. The Kane County Board of Review conducts hearings at the Government Center in Geneva. You may choose a streamlined hearing without appearing, or request a formal hearing to present your evidence in person. The Board will consider all submitted evidence including comparable sales data, photos, appraisals, and condition reports, then issue a written decision.

Step 1: Contact your Township Assessor for an informal review of your assessment before filing a formal complaint. Many issues can be resolved at this level without a Board of Review hearing.

Step 2: Obtain the Residential/Farm Assessment Complaint Form from the Kane County Assessment Office website (https://assessments.kanecountyil.gov) and review the Board of Review Rules and Procedures.

Step 3: Gather supporting evidence including at least three comparable properties (preferably with similar features and recent sales), photographs showing property condition, professional appraisals if available, and documentation of any physical defects or needed repairs.

Step 4: File your completed complaint form within 30 calendar days of the publication date for your township, either online, by mail, or in person. Submit all evidence with your complaint or electronically within 14 days after the filing deadline.

Step 5: Attend your Board of Review hearing if you requested one, or opt for a streamlined hearing without appearing. The Board will review your evidence against the assessor's valuation and issue a Notice of Findings in late winter or early spring.

Step 6: If you disagree with the Board of Review's decision, appeal to the Illinois Property Tax Appeal Board (PTAB) within 30 days of receiving the Notice of Findings.

Step 7: If the PTAB decision is unsatisfactory, you may file a tax objection complaint in Kane County Circuit Court within specific statutory deadlines, though this requires prior appeal to the Board of Review.

Required form: Residential/Farm Assessment Complaint Form (available at https://assessments.kanecountyil.gov)

Filing Methods

online:Submit via the Kane County Board of Review online system at https://assessments.kanecountyil.gov. Evidence must be submitted electronically within 14 days after filing.

mail:Kane County Board of Review, 719 Batavia Avenue, Building C, Geneva, IL 60134-3000

in-person:Kane County Government Center, 719 Batavia Avenue, Building C, Geneva, IL 60134. Office hours: Monday-Friday 8:30 AM - 4:30 PM

Evidence to Bring

At least three comparable property sales from 2026 with similar featuresPhotographs of property condition and defectsProfessional appraisal or recent sale documentsRepair estimates for needed workEqualized assessed value (EAV) comparables for equity appeals

Kane County Assessor Contact

Kane County Supervisor of Assessments

Phone: (630) 208-3818

Address: 719 South Batavia Avenue, Building C, Geneva, IL 60134-3000

Website: https://assessments.kanecountyil.gov

Online Portal: https://assessments.kanecountyil.gov

Hours: Monday-Friday 8:30 AM - 4:30 PM

Tax Exemptions in Kane County

General Homestead Exemption

$8,000 reduction in assessed value

Reduces the equalized assessed value of your primary residence before taxes are calculated

Eligibility: Owner-occupants of single-family homes, condos, and certain cooperatives who use the property as their primary residence as of January 1Deadline: Must apply with Kane County Assessment Office; once approved, renewal is automatic

Senior Citizen Homestead Exemption

$8,000 reduction in assessed value

Additional assessed value reduction for qualifying senior homeowners

Eligibility: Homeowners age 65 or older by December 31 of the assessment year who own and occupy the property as their principal residenceDeadline: Initial application required; once approved, automatic renewal while senior continues to occupy the home

Low-Income Senior Citizen Assessment Freeze (Senior Freeze)

Eliminates taxable valuation increases since base year

Freezes the equalized assessed value at the base year amount, preventing increases in assessed value from raising taxes

Eligibility: Seniors age 65+ with household income at or below $75,000 (for 2026 assessment year based on 2025 income)Deadline: Annual application required through Kane County Assessment Office or online portal

Disabled Veterans Standard Homestead Exemption

$2,500 reduction (30-49% disability), $5,000 reduction (50-69% disability), up to $250,000 reduction (70%+ disability)

Tiered exemption based on service-connected disability rating

Eligibility: Veterans with at least 30% service-connected disability certified by U.S. Department of Veterans Affairs, must own and occupy as primary residenceDeadline: Initial application with supporting VA documentation; 100% P&T veterans receive automatic renewal

Returning Veterans Homestead Exemption

$5,000 reduction in assessed value

Temporary exemption for veterans returning from active duty deployment

Eligibility: Veterans returning from active duty service in an armed conflict; available for two consecutive tax yearsDeadline: Apply with Kane County Assessment Office upon return from deployment

Homestead Exemption for Persons with Disabilities

$2,000 reduction in assessed value

Exemption for homeowners with disabilities that inhibit employability

Eligibility: Persons with disabilities who own and occupy property as primary residence and are liable for property taxesDeadline: Apply with Kane County Assessment Office with disability certification

Kane County Appeal Packet · $49

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Frequently Asked Questions

What is the deadline to appeal my property taxes in Kane County for 2026?

The deadline to file a property tax appeal in Kane County is 30 calendar days after the date of publication of the assessment list for your specific township. Kane County publishes township-specific deadlines throughout the year, ranging from early July to late August 2026. For example, Dundee Township's deadline is July 9, 2026, while Sugar Grove Township's deadline is August 24, 2026. You must check the official Kane County Assessment Office website at assessments.kanecountyil.gov to confirm your township's exact publication date and filing deadline, as missing this deadline means you cannot appeal until the next assessment year.

How do I file a property tax appeal online in Kane County?

Kane County provides an online Board of Review system where you can register, submit your assessment complaint, and track your filing status. Visit assessments.kanecountyil.gov to access the online portal and download the Residential/Farm Assessment Complaint Form. You must file your complaint within 30 days of your township's publication date, and you can submit supporting evidence electronically within 14 days after the filing deadline. The online system allows you to upload comparable sales data, photographs, appraisals, and other documentation to support your appeal. You can also choose whether you want a streamlined hearing without appearing or prefer to present your case in person before the Board of Review.

What is the General Homestead Exemption worth in Kane County?

The General Homestead Exemption in Kane County reduces your property's equalized assessed value by $8,000 before taxes are calculated. At Kane County's effective tax rate of 2.09%, this exemption saves the average homeowner approximately $167 annually, though actual savings depend on your specific property's tax rate which varies by taxing district. You must own and occupy the property as your primary residence as of January 1 of the assessment year to qualify. Once you submit the initial application and are approved, the exemption automatically renews each year as long as you continue to occupy the home as your primary residence, so you don't need to reapply annually.

What happens at a Board of Review hearing in Kane County?

Kane County Board of Review hearings are held at the Kane County Government Center, Third Floor of Building C, 719 Batavia Avenue in Geneva. During your hearing, you will present your evidence to Board members, which should include at least three comparable property sales with similar features, photographs showing your property's condition, and any professional appraisals or repair estimates. The Board will review your evidence against the Township Assessor's valuation and ask questions to clarify your arguments. Alternatively, you can opt for a streamlined hearing by checking a box on your complaint form, which means you won't appear in person and the Board will review your written evidence only. You'll receive a written Notice of Findings in late winter or early spring, typically January or February of the following year.

How much can I save by appealing my property taxes in Kane County?

Potential savings from a successful property tax appeal in Kane County depend on how much your assessed value is reduced and your property's specific tax rate. On a typical Kane County home valued at $245,000 with an effective tax rate of 2.09%, a 10% reduction in assessed value would save approximately $511 annually. For homes in higher-tax areas or with larger overassessments, savings can be substantially greater, homeowners in some Kane County communities pay $6,802 to $7,219 annually, so even a modest assessment reduction translates to hundreds of dollars per year. Since property tax bills compound over time, a successful appeal provides savings not just for one year but potentially for multiple years until the next reassessment, making the total benefit significantly larger.

What evidence do I need for a Kane County property tax appeal?

For a successful Kane County property tax appeal, you must provide at least three comparable properties (comps) with similar features such as square footage, lot size, age, condition, and location that sold recently in 2026 or late 2025. The Kane County Board of Review requires equalized assessed value (EAV) comparables for equity-based appeals, which you can obtain through the county's online property search tool. Include dated photographs showing your property's condition, particularly any defects, needed repairs, or outdated features that justify a lower valuation. If you have a recent professional appraisal, contractor repair estimates, or documentation of property characteristics errors in the assessor's records, include those as well. All evidence must either accompany your complaint form or be submitted electronically within 14 calendar days after your township's filing deadline.

Should I contact my Township Assessor before filing an appeal in Kane County?

Yes, Kane County strongly encourages homeowners to discuss their assessment with their Township Assessor before filing a formal complaint with the Board of Review. Many assessment issues can be resolved informally at the township level without going through the formal hearing process, saving you time and effort. Your Township Assessor can correct factual errors in your property record, such as incorrect square footage, number of bedrooms, or lot size, and may be willing to adjust your assessment if you present compelling evidence. If the Township Assessor agrees to reduce your assessment, you won't need to file a Board of Review complaint at all. However, if you and the Township Assessor cannot reach an agreement, you still have the right to file a formal appeal within the 30-day deadline after publication.

Can I appeal to the state if I disagree with the Kane County Board of Review decision?

Yes, if you disagree with the Kane County Board of Review's decision on your property valuation, you can appeal to the Illinois Property Tax Appeal Board (PTAB) within 30 days of receiving your Notice of Findings from the Board of Review. The PTAB is a state-level administrative body that conducts an independent review of your appeal with fresh evidence and arguments. PTAB appeals require specific forms and procedures, and the process typically takes several months to complete. If you're still unsatisfied after the PTAB decision, you have the option to file a tax objection complaint in Kane County Circuit Court, though this requires that you first filed an assessment complaint with the Board of Review and involves more complex legal procedures and deadlines.

Official Resources

Kane County Assessment Office →

Official county website for property search, assessment complaint forms, exemption applications, and township-specific appeal deadlines.

Illinois Property Tax Appeal Board (PTAB) →

State-level appeal board for challenging Board of Review decisions, with forms and filing instructions.

Illinois Department of Revenue - Property Tax Exemptions →

Comprehensive information on all Illinois property tax exemptions including homestead, senior, veteran, and disability exemptions.

Kane County Online Exemption Portal →

Online portal for filing homestead exemption applications, senior freeze applications, and other property tax exemptions electronically.

For state-wide appeal information including Illinois's assessment ratio and deadlines, see our Illinois Property Tax Appeal Guide →

Considering professional help with your appeal? Compare pricing, coverage, and pros/cons in our Best Property Tax Appeal Services (2026) or browse side-by-side service comparisons →

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← All Illinois property tax appeal info

Sources: https://assessments.kanecountyil.gov | https://www.tax-rates.org/illinois/kane_county_property_tax | https://assessments.kanecountyil.gov/Documents/Rules.pdf | https://assessments.kanecountyil.gov/Pages/Exemptions.aspx | https://en.wikipedia.org/wiki/Kane_County,_Illinois

Last verified: 2026-07-24