Sangamon County Property Tax Appeal — Illinois

Rob Hartley·Updated March 5, 2026

Sangamon County is located in central Illinois with its county seat in Springfield, the state capital. The county has a population of approximately 196,000 and includes notable cities such as Chatham, Auburn, Sherman, and Rochester. Property tax appeals are particularly important here as Sangamon County has one of the highest effective property tax rates in Illinois at 1.87%, significantly above the national median of 1.02%. With a median annual tax bill of $2,219 compared to the national median of $2,400, homeowners should carefully review their assessments to ensure they are not overpaying.

Notable cities: Springfield, Chatham, Auburn, Sherman, Rochester

Median Home

$118,900

Tax Rate

1.87%

Annual Tax

$2,219

Population

196,343

2026 Appeal Deadline: 30 days after the date of publication of township assessment changes

The Sangamon County Board of Review convenes each year by July 1. Appeals must be filed within 30 calendar days after the date of publication of the township assessor's changes in the local newspaper. No extensions are granted, and the deadline is strictly enforced. Postmarks are accepted if mailed by the deadline.

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

How Sangamon County Assesses Property

33.33%of market value

Assessed by: Sangamon County Supervisor of Assessments

Assessment cycle: annual

Notices typically mailed: Spring (typically mid-May)

In Sangamon County, property is assessed at 33.33% of its fair market value, as required by Illinois law. For example, if your home's market value is $150,000, at Illinois's 33.33% assessment ratio your assessed value would be $50,000 (approximately). At the county's effective rate of 1.87%, this would result in approximately $2,805 in annual property taxes. A state equalization multiplier may also be applied to ensure countywide assessments meet the statutory requirement.

The Appeal Process

Appeals are heard by the Board of Review. After filing your appeal, the Board of Review will schedule a hearing where you can present evidence supporting your claim that the assessment is too high. The Board will review your evidence and the assessor's valuation, then issue a written decision that will be mailed to you.

Step 1: Obtain your property record card from the Sangamon County Supervisor of Assessments office showing the current assessed valuation and property characteristics.

Step 2: Research comparable property sales in your area or obtain a professional appraisal to establish the fair market value of your property. You can use the county's online property search at tax.co.sangamon.il.us to find comparable assessments.

Step 3: Prepare five (5) copies of your assessment complaint documents and all supporting evidence, including comparable sales data, photographs of your property, repair estimates for defects, or a recent appraisal.

Step 4: File your appeal with the Sangamon County Board of Review within 30 days of the publication date of your township's assessment changes. Appeals can be filed online, by mail, or in person beginning July 1.

Step 5: Attend the Board of Review hearing if scheduled. Present your evidence showing why your assessment should be reduced based on market value or equity with comparable properties.

Step 6: If the Board of Review denies your appeal or you disagree with their decision, you may appeal to the Illinois Property Tax Appeal Board (PTAB) within 30 days of receiving the Board's written decision.

Step 7: As a final option, if you disagree with the PTAB decision, you may file a tax objection complaint in circuit court under the Administrative Review Law.

Required form: Assessment Complaint Form (available online or from Board of Review)

Filing Methods

online:https://tax.co.sangamon.il.us/ - Search for your parcel and file an assessment complaint through the online portal

mail:Sangamon County Board of Review, Sangamon County Complex, Room 210, 200 S. 9th Street, Springfield, IL 62701

in-person:Sangamon County Complex, Room 210, 200 S. 9th Street, Springfield, IL 62701 (8:30 AM - 5:00 PM Monday-Friday)

Evidence to Bring

Recent comparable property sales within the last 1-3 years showing similar properties sold for lessProfessional appraisal report documenting current market valuePhotographs showing property defects, damage, or conditions affecting valueRepair estimates or contractor invoices for needed repairsProperty record card showing assessment details and any errors in square footage or features

Sangamon County Assessor Contact

Sangamon County Supervisor of Assessments

Phone: (217) 753-6805

Address: Sangamon County Complex, Room 210, 200 South 9th Street, Springfield, IL 62701

Website: https://sangamonil.gov/departments/s-z/supervisor-of-assessments

Online Portal: https://tax.co.sangamon.il.us/

Hours: 8:30 AM to 5:00 PM Monday through Friday (except holidays)

Tax Exemptions in Sangamon County

General Homestead Exemption

Up to $6,000 reduction in EAV

Reduces the equalized assessed value (EAV) of owner-occupied residential property

Eligibility: Property must be the owner's principal residence as of January 1 of the tax year. Owner must be liable for payment of property taxes.Deadline: Initial application required with new ownership; automatically renewed thereafter

Senior Citizen Homestead Exemption

$5,000 reduction in EAV

Additional reduction for seniors age 65 or older

Eligibility: Owner must be 65 years old by December 31 of the tax year, own and occupy the property as principal residence, and be responsible for property taxes.Deadline: Initial application required; renewal sent annually in January

Senior Citizen Assessment Freeze Homestead Exemption

Difference between base EAV and current EAV

Freezes the assessed value at a base year to prevent increases

Eligibility: Owner must be 65 or older, have total household income of $65,000 or less, and have owned and occupied the property for at least 2 years.Deadline: July 1 annually; renewal forms sent in January

Homestead Improvement Exemption

Up to $75,000 in fair cash value ($25,000 assessed value) per year

Exempts the added value from new improvements or additions for four years

Eligibility: Owner-occupied residential property with new improvements such as room additions, garages, or decks.Deadline: Must apply after improvement is completed

Disabled Persons Homestead Exemption

$2,000 reduction in EAV

Annual reduction for persons with disabilities

Eligibility: Owner or person with legal interest in property must have a qualifying disability and occupy the property as primary residence.Deadline: Initial application required; annual renewal with Form PTAX-343-R

Disabled Veterans Standard Homestead Exemption

$2,500 (30-49% disability), $5,000 (50-69% disability), or 100% exemption (70%+ disability)

Reduction based on service-connected disability percentage

Eligibility: Veteran with service-connected disability certified by U.S. Department of Veterans Affairs. Property EAV must be less than $250,000.Deadline: July 1 annually with Form PTAX-342

Returning Veterans Homestead Exemption

$5,000 reduction in EAV for two years

Two-year exemption for veterans returning from active duty in armed conflict

Eligibility: Veteran must return from active duty in armed conflict and own and occupy property as principal residence.Deadline: Upon return from service; two-year benefit

Official Resources

Sangamon County Supervisor of Assessments →

Official county assessor website with exemption forms, assessment information, and contact details.

Sangamon County Property Tax Portal →

Search property records, view assessments, pay taxes, and file assessment complaints online.

Illinois Property Tax Appeal Board (PTAB) →

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

Illinois Department of Revenue - Property Tax Exemptions →

Comprehensive guide to all Illinois property tax exemptions including homestead, senior, veteran, and disability exemptions.

Check Your Sangamon County Assessment

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

✓ All 50 states✓ Instant results✓ $49 flat fee

Frequently Asked Questions

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

In Sangamon County, you must file your property tax appeal within 30 calendar days after the date of publication of the township assessor's assessment changes in the local newspaper. The Sangamon County Board of Review convenes by July 1 each year, and appeals are accepted beginning July 1 but no later than 30 days after publication. This deadline is strictly enforced with no extensions granted, so it's critical to monitor publication dates or check with the Board of Review for your specific township's deadline. If you miss the county deadline, you cannot appeal for that tax year.

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

To file a property tax appeal online in Sangamon County, visit the county's property tax portal at tax.co.sangamon.il.us. First, search for your property by parcel number, owner name, or property address. Once you locate your parcel, use the dropdown navigation in the Action field and select the option to file an assessment complaint. You will need to provide five copies of your complaint documents and supporting evidence. The online system allows you to upload documents electronically, making the process more convenient than mailing paper copies. Make sure you file within 30 days of your township's publication date.

What is the homestead exemption worth in Sangamon County?

The General Homestead Exemption in Sangamon County reduces your property's equalized assessed value (EAV) by up to $6,000, which is the maximum allowed for counties outside of Cook County and its contiguous neighbors. For a typical property with an effective tax rate of 1.87%, this exemption saves approximately $112 per year in property taxes. Senior citizens age 65 and older can receive an additional Senior Citizen Homestead Exemption worth $5,000 in reduced EAV, for a combined total exemption of up to $11,000. All homeowners should ensure they have applied for the General Homestead Exemption on their primary residence.

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

For a successful property tax appeal in Sangamon County, you need to provide compelling evidence that your property is overassessed compared to its market value or compared to similar properties. The most effective evidence includes recent comparable sales of similar homes in your neighborhood from the past 1-3 years, a professional appraisal showing current market value, photographs documenting property defects or conditions that reduce value, and repair estimates for needed work. You must submit five copies of all documents and evidence to the Board of Review. The county also accepts equity arguments showing that similar properties are assessed at lower values than yours.

How is property assessed in Sangamon County, Illinois?

In Sangamon County, property is assessed annually by the Supervisor of Assessments office based on fair market value. Illinois law requires that property be assessed at 33.33% (one-third) of its market value. For example, if your home has a market value of $150,000, your assessed value would be approximately $50,000. The state may also apply an equalization multiplier to bring countywide assessments to the statutory level. Assessment notices are typically mailed in the spring, usually by mid-May, and include both the market value and assessed value along with an estimated tax bill.

Can I appeal to the state if the Sangamon County Board of Review denies my appeal?

Yes, if the Sangamon County Board of Review denies your appeal or you disagree with their decision, you have the right to appeal to the Illinois Property Tax Appeal Board (PTAB) within 30 days of the postmark date of the Board of Review's written decision. The PTAB is a state-level quasi-judicial body that provides an unbiased forum to contest property assessments. You must use the PTAB's prescribed forms and submit evidence supporting your claim. There is no fee to file with the PTAB. If you're still unsatisfied after the PTAB decision, you may file a tax objection complaint in circuit court as a final option.

What happens at a Sangamon County Board of Review hearing?

At a Sangamon County Board of Review hearing, you will have the opportunity to present your evidence showing why your property assessment should be reduced. You should bring all supporting documentation including comparable sales data, appraisals, photographs, and repair estimates. The Board will also review the assessor's evidence supporting the current valuation. The hearing is typically informal, and you may represent yourself without an attorney for residential appeals. After reviewing all evidence, the Board will issue a written decision that is mailed to you. You must continue to pay your property taxes while the appeal is pending, and if successful, you'll receive a refund for any overpayment.

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

The amount you can save by appealing your property taxes in Sangamon County depends on how much your assessment is reduced. For example, if you successfully reduce your assessed value by $10,000 at the county's effective tax rate of 1.87%, you would save approximately $187 per year in property taxes. National statistics show that about 25% of homes are overassessed, paying an average of $1,346 too much annually. In Sangamon County, where the median annual tax bill is $2,219, even a modest 10-15% reduction in assessed value could save hundreds of dollars per year. Successful appeals establish a lower baseline assessment that can provide savings for years to come.

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

Champaign County (Champaign)Cook County (Chicago)DeKalb County (Sycamore)DuPage County (Naperville)Grundy County (Morris)Kane County (Aurora)

← All Illinois property tax appeal info

Sources: https://tax.co.sangamon.il.us/ | https://sangamonil.gov/departments/s-z/supervisor-of-assessments | https://tax.illinois.gov/localgovernments/property/taxrelief.html | https://www.ptab.illinois.gov/ | https://www.tax-rates.org/illinois/sangamon_county_property_tax | https://www.ownwell.com/trends/illinois/sangamon-county

Last verified: 2026-03-05