Springfield & Sangamon County, IL Property Tax Appeals
Researched from official Sangamon County sources · Updated October 2026
You already have the deadline and the forms. The part you can't look up is whether your own assessment would actually hold up — this checks it against real comparable sales and shows you the dollar gap, in about two minutes.
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Sangamon County, Illinois sets Board of Review filing deadlines township by township, 30 days after each township's assessment notices are published. As of October 10, 2026 the county's table shows deadlines of November 9 (Gardner, Loami, Maxwell), November 16 (Auburn, Divernon, Williams) and November 23, 2026 (Chatham), with other townships, including Springfield, not yet listed. The Capital township deadline was September 8, 2026.
Rules for the rest of Illinois are in our Illinois property tax appeal guide.
2026 deadline and where to file
Status as of October 10, 2026. The county updates its filing table as each township publishes, so check it for your township.
- Capital: published 08/06/2026, deadline 09/08/2026 (passed)
- Gardner, Loami, Maxwell: published 10/08/2026, deadline 11/09/2026
- Auburn, Divernon, Williams: published 10/15/2026, deadline 11/16/2026
- Chatham: published 10/22/2026, deadline 11/23/2026
- All other townships, including Springfield: no dates listed on the county's page yet.
- Form: print the Assessment Complaint from the county property tax site by searching your parcel, choosing the Go action under Reports/Forms: For Tax Payers, then selecting Assessment Complaint.
- Questions: Supervisor of Assessments, (217) 753-6805. Sangamon County Complex, 200 South 9th Street, Springfield, IL 62701.
- After the Board of Review: the Property Tax Appeal Board petition is due within 30 days of the postmark date of the Board of Review's written decision. Late petitions are rejected.
Before you read another page of forms and filing rules, find out if there's actually a gap between your assessment and what comparable homes sold for. Two minutes, and you'll know whether the rest of this guide is worth your time.
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How assessments work in Sangamon County
Illinois counties outside Cook assess through township assessors, and a county Board of Review hears complaints about those assessments. In Sangamon County the Supervisor of Assessments runs the county assessment office, and each township has its own assessor. The county publishes a list of assessors and township multipliers. The Board of Review filing table shows the date each township's assessments were published, the date they were mailed, and the filing deadline.
The Illinois Property Tax Appeal Board (PTAB) says its jurisdiction is limited to the correct assessment of a property based on equity and the weight of the evidence. It cannot review the amount of a tax bill or the tax rate. The Board of Review wants evidence of a lower value: sales of comparable homes, an appraisal or a sales contract, and photos. The person who files the complaint has the burden of proving the lower value.
Exemptions and their deadlines
- Exemptions: the Supervisor of Assessments page lists links to apply for exemptions, check your exemptions, apply or renew preferential assessment, and the Senior Citizens Real Estate Tax Deferral program.
- Phone: the Supervisor of Assessments handles exemptions and equalization factors at (217) 753-6805.
The county page does not list exemption filing dates in the part I opened, so ask the office for current dates. An exemption lowers what is taxed. An assessment complaint changes the assessed value.
How to appeal, step by step
- Find your assessment and your township. Search your parcel on the Sangamon County property tax site. Note your township and look it up in the Board of Review filing deadlines table.
- Talk to your township assessor. The county encourages this, but the Board of Review deadline does not wait. Call the Supervisor of Assessments at (217) 753-6805 with questions.
- Pull comparables. Get property record cards for similar homes with lower assessments, or recent sales close to your home, and photos of your home and the comparables.
- File the complaint with the Board of Review. Print the Assessment Complaint form from the property tax site and file it with the Board of Review before your township's deadline.
- Attend or waive the hearing. You will be notified of the Board of Review's written decision. Keep the postmark date, because it starts the 30-day PTAB clock.
- If you disagree with the Board of Review, the PTAB petition is due within 30 days of the postmark date of the Board of Review's written decision. Faxed or e-mailed PTAB appeals are not accepted.
What property taxes cost in Sangamon County
The U.S. Census Bureau's American Community Survey (2020-2024 five-year estimates) puts the median real estate tax paid by Sangamon County homeowners at $3,512 a year, against a median home value of $176,300. That is an effective rate of about 1.99% of home value (median tax divided by median value). It is a countywide figure: your own rate depends on your city, school district and special districts, so read the rate on your actual bill. About 60,443 homes in the county are owner-occupied. Source: Census Reporter, tables B25103 and B25077.
Check your value before you file
Start with the free Grove Hopper over-assessment check: enter your address and we compare your assessment to the data and tell you whether an appeal looks worth your time. If it does, we prepare your appeal documents. You review, sign and file them yourself with the Sangamon County Board of Review. We do not file for you or represent you, and we are not attorneys, accountants or a tax firm.
Contacts
- Sangamon County Supervisor of Assessments: Sangamon County Complex, 200 South 9th Street, Springfield, IL 62701 · (217) 753-6805
- Sangamon County Treasurer (payment under protest): (217) 753-6800
Sangamon County appeal FAQs
What is the deadline to appeal my property taxes in Sangamon County, Illinois?
It depends on your township. The Board of Review deadline is 30 days after your township's assessments are published. On October 10, 2026 the county listed November 9 for Gardner, Loami and Maxwell, November 16 for Auburn, Divernon and Williams, and November 23 for Chatham.
Where do I find my township deadline?
On the Sangamon County Supervisor of Assessments "Assessment Complaint Form" page, which has a Board of Review Filing Deadlines table by township.
How do I get the Sangamon County complaint form?
Search your parcel on the county property tax website, choose Go under Action, then Reports/Forms: For Tax Payers, then Assessment Complaint.
What if I disagree with the Board of Review?
File a petition with the Illinois Property Tax Appeal Board within 30 days of the postmark date of the Board of Review's written decision. Late petitions are rejected.
Can I appeal my tax rate in Sangamon County?
No. The PTAB says it does not have jurisdiction over the amount of a tax bill or the tax rate. Assessment complaints are about the assessed value.
Does Grove Hopper file my Sangamon County complaint?
No. Grove Hopper is a research tool. We check your property against the data and prepare your appeal documents. You review, sign and submit the complaint to the Sangamon County Board of Review yourself. We are not attorneys, accountants or a tax firm.
You already have the deadline and the forms. The part you can't look up is whether your own assessment would actually hold up — this checks it against real comparable sales and shows you the dollar gap, in about two minutes.
Free · no account · we never sell your address
- https://sangamonil.gov/departments/s-z/supervisor-of-assessments/assessment-complaint-form
- https://sangamonil.gov/departments/s-z/supervisor-of-assessments
- https://www.ptab.illinois.gov/counties/Sangamon.pdf
- https://ptab.illinois.gov/faq.html
- https://www.ptab.illinois.gov/Filing.html
- https://censusreporter.org/profiles/05000US17167-sangamon-county-il/
This guide is researched from public sources and updated periodically; deadlines and procedures can change — always confirm with the county before filing. Grove Hopper is a research tool, not a law firm or tax advisor.