Kane County Property Tax Appeal — Illinois

Rob Hartley·Updated February 15, 2026

Kane County is located in northeastern Illinois with the county seat in Geneva, housed in the Kane County Government Center. The county includes major population centers such as Aurora, Elgin, St. Charles, and West Dundee. Homeowners in Kane County face a median property tax bill that is significantly higher than the national median of $2,400, with the 25th percentile tax bill at $4,593 and the 75th percentile reaching $9,112. In Kane County, the effective property tax rate is 2.60%, which is significantly higher than the national median property tax rate of 1.02%. Property tax appeals are crucial here as the high tax burden creates substantial opportunities for savings through successful appeals.

Notable cities: Aurora, Elgin, St. Charles, West Dundee, Geneva, Batavia

Median Home

$312,600

Tax Rate

2.60%

Annual Tax

$7,219

Population

approximately 540,000

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

Kane County publishes township-specific filing deadlines. Do not assume a universal county deadline. Appeals must be submitted within 30 business days of the assessment notice mailing or live publication.

Property in Kane County, Illinois — local tax assessment and appeal guide

How Kane County Assesses Property

33.33%of market value

Assessed by: Kane County Assessment Office

Assessment cycle: annual

Notices typically mailed: Spring (typically mid-May)

In Illinois, properties are assessed at 33.33% of their fair market value. If your home's market value is $312,600, at Illinois's 33.33% assessment ratio your assessed value would be $104,193, resulting in approximately $2,709 in annual taxes at the county's effective rate of 2.60%.

The Appeal Process

Appeals are heard by the Board of Review. After talking with the Township Assessor, taxpayers still wishing to pursue an assessment complaint will need to familiarize themselves with the rules governing hearings before the Board.

Step 1: Discuss your assessment with the Township Assessor prior to filing a complaint to clarify assessment reasons or correct errors in the property record card

Step 2: Verify your property facts and confirm the correct township deadline

Step 3: Build the strongest evidence set for your argument including comparable sales, photos, and repair estimates

Step 4: File through the Board of Review portal or submit evidence electronically within 14 calendar days after the filing deadline

Step 5: If you disagree with the Board of Review's decision, appeal to the Illinois Property Tax Appeal Board (PTAB) within 30 days of the Notice of Findings being sent

Required form: Form PTAX-230

Filing Methods

online:https://www.KaneCountyAssessments.org/Pages/Evidence.aspx

mail:Kane County Assessment Office, 719 S. Batavia Ave, Bldg C, Geneva, IL 60134

in-person:Kane County Assessment Office, 719 S. Batavia Ave, Bldg C, Geneva, IL 60134

Evidence to Bring

comparable salesphotos of property conditionrepair estimatesrecent appraisals

Kane County Assessor Contact

Kane County Assessment Office

Phone: (630) 208-3818

Address: 719 S. Batavia Ave, Bldg C, Geneva, IL 60134

Website: https://assessments.kanecountyil.gov/

Online Portal: https://www.KaneCountyAssessments.org/Pages/Evidence.aspx

Hours: Monday - Friday 8:30 a.m. - 4:30 p.m.

Tax Exemptions in Kane County

General Homestead Exemption

$8,000 in equalized assessed value

Reduces the taxable value of a property by a specific amount prior to taxes being calculated

Eligibility: Properties that are the principal residence of the owner-taxpayerDeadline: November 30 of the assessment year

Senior Citizen Homestead Exemption

$8,000 in equalized assessed value

Reduces the taxable valuation of a property by up to $8,000 in assessed value

Eligibility: Taxpayers who own and reside in a home as a principal dwelling place and are 65 or older by December 31 of the tax assessment yearDeadline: November 30 of the assessment year

Senior Freeze Exemption

Freezes assessed value at base year level

Low-income Senior Citizen Assessment Freeze Homestead Exemption eliminates the taxable valuation of a property by any amount since the base year value

Eligibility: Beginning in the 2026 (payable 2027) year, the maximum household income will increase to $75,000Deadline: Contact Kane County Assessment Office for details

Disabled Veterans Exemption

Varies based on disability percentage

For disabled veterans who have Specially Adapted Housing

Eligibility: Veterans with service-connected disabilitiesDeadline: Contact Kane County Assessment Office for details

Persons with Disabilities Exemption

$2,000

For homeowners with disabilities that inhibit employability

Eligibility: Homeowners with disabilities that inhibit employabilityDeadline: Contact Kane County Assessment Office for details

Official Resources

Kane County Assessment Office →

The official Kane County Assessment Office website provides forms, exemption information, and property search tools.

Kane County Property Tax Search →

Search for property tax information by entering your Parcel Number or Last Name as it appears on your Tax Bill.

Illinois Property Tax Appeal Board →

File appeals beyond the county level if you disagree with the Board of Review's decision about your property valuation.

Kane County Board of Review Evidence Portal →

Submit evidence electronically for your property tax appeal within 14 days after the filing deadline.

Check Your Kane County Assessment

Enter your address to see if your Kane County property is overassessed.

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Frequently Asked Questions

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

In Kane County, you must file your property tax appeal within 30 calendar days after the date of publication of the current year assessment list. Kane County publishes township-specific filing deadlines, so do not assume a universal county deadline. It's crucial to verify the exact deadline for your specific township by contacting the Kane County Assessment Office at(630) 208-3818 or checking their website. Missing this deadline means you'll have to wait until the next assessment year to file an appeal.

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

To file your property tax appeal online in Kane County, you can submit evidence electronically at https://www.KaneCountyAssessments.org/Pages/Evidence.aspx no more than fourteen (14) calendar days after the filing deadline. You'll need to complete Form PTAX-230 for your formal appeal. The online system allows you to upload supporting documents such as comparable sales data, photos of your property's condition, and recent appraisals. Make sure all evidence is submitted within the required timeframe to ensure your appeal is properly considered.

What is the homestead exemption worth in Kane County?

The General Homestead Exemption in Kane County reduces your equalized assessed value by $8,000, which translates to real tax savings. In Kane County, tax rates generally range from about 6.50% to 11.25%, with a median rate of 9.00%. This means the General Homestead Exemption typically saves homeowners between $520 and $900 annually on their property tax bill. To qualify, the property must be your principal residence as of January 1st of the tax year, and you must apply by November 30th.

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

After talking with the Township Assessor, taxpayers still wishing to pursue an assessment complaint will need to familiarize themselves with the rules governing hearings before the Board. The Board will consider all evidence submitted. During the hearing, you'll present your case using evidence such as comparable property sales, photos showing your property's condition, and any professional appraisals. The Board members will review your evidence against the assessor's valuation and make a determination. If you disagree with the Board's decision, you can appeal to the Illinois Property Tax Appeal Board (PTAB) within 30 days.

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

With Kane County's effective property tax rate of 2.60%, which is significantly higher than the national median of 1.02%, even modest reductions in your assessed value can lead to substantial savings. For example, if your appeal results in a $30,000 reduction in your home's assessed value, this would lower your equalized assessed value by $10,000 (at the 33.33% assessment ratio), potentially saving you about $260 per year at the median tax rate. Many successful appeals achieve reductions of 10-20% or more, which could save Kane County homeowners between $700 and $1,400 annually on a median-valued home.

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

Your appeal can include supporting documents such as recent appraisals, comparable sales data, or evidence of property damage that affects value. If your appeal relies on a fact (size, condition, vacancy, use), have a document or photo that proves it—before you upload anything. The strongest evidence includes recent sales of truly comparable properties in your neighborhood, professional appraisals dated within the last year, photos documenting any property defects or needed repairs, and contractor estimates for major repairs. Focus on quality over quantity—three or four strong comparable sales typically carry more weight than a long list of properties that aren't truly similar to yours.

Can I appeal my Kane County property taxes if I missed the initial deadline?

By state law, the time period for filing a complaint cannot be extended while discussing the assessment with the Township Assessor. If you miss the 30-day filing deadline after publication, you generally cannot appeal for that tax year. However, you don't have to wait for the next reassessment to exercise your right to appeal. You can file an appeal in the following year, and it's recommended to start preparing early by gathering evidence and monitoring when assessment notices are published for your township. Additionally, if significant changes occur to your property (like damage), you may be eligible for other forms of relief.

What is the difference between appealing at the township level versus the county Board of Review in Kane County?

Taxpayers are strongly encouraged to discuss their real estate assessments with the Township Assessor prior to the filing of a complaint with the Board, as many times the reason for the assessment can be made clear or any errors in the property record card can be corrected, eliminating the need for filing a complaint. The township assessor level is more informal and focuses on correcting factual errors about your property. The Board of Review is the formal appeal process where you present evidence to challenge your valuation. Outside of Cook County, there is only the BOR deadline, meaning it is the only opportunity to appeal for the current year. Starting with the township assessor can often resolve issues without needing a formal appeal.

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 →

More Illinois Counties

Cook County (Chicago)DuPage County (Naperville)Lake County (Waukegan)McHenry County (Woodstock)Will County (Joliet)

← All Illinois property tax appeal info

Sources: https://assessments.kanecountyil.gov/ | https://www.ownwell.com/trends/illinois/kane-county | https://smartasset.com/taxes/illinois-property-tax-calculator | https://kanecountyconnects.com/ | https://www.foreclosuredefenselawoffice.com/legal-services/kane-county-tax-appeal/

Last verified: 2026-02-15