Sangamon County Property Tax Appeal, Illinois

Travis Bunn·Updated July 24, 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

196,000

On the typical Sangamon County home, valued near $118,900 at the county’s effective tax rate of 1.87%, 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 days after the date of publication of the township assessor's changes in the local newspaper

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. For 2026, many townships publish notices in fall (September-October).

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

How Sangamon County Assesses Property

33.33%of market value

Assessed by: Sangamon County Supervisor of Assessments

Assessment cycle: quadrennial (4-year cycle)

Notices typically mailed: First quarter of the year when reassessment occurs

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 $118,900 (the county median), at Illinois's 33.33% assessment ratio your assessed value would be approximately $39,630. At the county's effective rate of 1.87%, this would result in approximately $2,219 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. Review the assessment notice carefully and note the publication date of your township's assessment changes.

Step 2: Consider an informal review with the Supervisor of Assessments office before filing a formal appeal. Many times errors in the property record card can be corrected or the reason for the assessment can be made clear, eliminating the need for filing an appeal with the Board of Review.

Step 3: Gather evidence to support your appeal. The Board wants proof that your property's market value on January 1 of the tax year is lower than what the assessor claims. Strong evidence includes comparable sales of similar properties, recent independent appraisals, photographs of property defects or condition problems, and repair estimates for structural issues.

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. You must submit 5 copies of assessment complaint documents and accompanying evidence. Appeals can be filed online through the county property tax portal, by mail, or in person beginning July 1.

Step 5: Attend the Board of Review hearing if scheduled. A board member will review your evidence against the assessor's record. Present your evidence showing why your assessment should be reduced based on market value or equity with comparable properties. Bring printed comparables, a one-page summary of your argument, and photos of any condition problems.

Step 6: The Board of Review will review your evidence and the assessor's valuation, then issue a written decision that will be mailed to you. 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 within 35 days of the PTAB decision.

Required form: Assessment Complaint Form (available online through Sangamon County property tax portal)

Filing Methods

online:File through the Sangamon County Property Tax portal at https://tax.co.sangamon.il.us/ beginning July 1

mail:Mail 5 copies of assessment complaint documents and accompanying evidence to Sangamon County Board of Review, 200 S. 9th Street, Room 210, Springfield, IL 62701

in-person:Deliver to Sangamon County Complex, Room 210, 200 S. 9th Street, Springfield, IL 62701

Evidence to Bring

Comparable sales (comps) of similar properties sold recentlyRecent independent appraisalPhotographs showing property condition issues or defectsRepair estimates for structural problemsProperty record card showing assessment details

Sangamon County Assessor Contact

Sangamon County Supervisor of Assessments

Phone: (217) 753-6805

Address: 200 S. 9th Street, Room 210, 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 legal holidays

Tax Exemptions in Sangamon County

General Homestead Exemption

Up to $6,000 reduction in EAV

Reduces a home's Equalized Assessed Value (EAV) for owner-occupied residential property

Eligibility: Must live in the home as your primary residence. Application required with new ownership.Deadline: Generally tracks the Board of Review complaint deadline (late fall)

Senior Citizen Homestead Exemption

$5,000 reduction in EAV

Additional exemption for persons age 65 or over on their primary residence

Eligibility: At least one owner must be 65 years or older. Must be owner-occupied primary residence.Deadline: Generally tracks the Board of Review complaint deadline (late fall)

Senior Citizens Assessment Freeze

Freezes EAV at base year value (potentially thousands in savings)

Freezes a senior household's EAV at its base-year level, preventing increases due to rising market values

Eligibility: At least one owner must be 65 or older, and household income must be at or below $65,000. Requires yearly application.Deadline: Annual application required with Form PTAX-340

Persons with Disabilities Exemption

$2,000 reduction in EAV

Annual reduction in Equalized Assessed Value for disabled homeowners

Eligibility: Disabled person must live in the home as primary residence, pay property taxes, and have ownership or legal interest in the propertyDeadline: Generally tracks the Board of Review complaint deadline (late fall)

Returning Veterans Exemption

$5,000 reduction in EAV for two years after returning from active duty

Provides EAV reduction for veterans returning from active duty

Eligibility: Veterans in the year they return from active duty. Must file Form PTAX-341.Deadline: Generally tracks the Board of Review complaint deadline (late fall)

Veterans with Disabilities Exemption

15% or 25% reduction depending on disability rating; full exemption at 70%+ service-connected rating

Provides significant EAV reduction or full exemption for disabled veterans based on disability rating

Eligibility: Veterans with service-connected disabilities. Rating must be verified by VA.Deadline: Generally tracks the Board of Review complaint deadline (late fall)

Homestead Improvement Exemption

Up to $75,000 in added value exempt for four years

New improvements (addition, renovation) can be exempt from assessment for up to four years

Eligibility: Improvements to owner-occupied residential propertyDeadline: Generally tracks the Board of Review complaint deadline (late fall)

Sangamon County Appeal Packet · $49

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Frequently Asked Questions

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

The deadline to file a property tax appeal in Sangamon County is 30 calendar days after the date of publication of the township assessor's changes in the local newspaper. The Sangamon County Board of Review convenes each year by July 1, and most townships publish assessment notices in fall (typically September or October). No extensions are granted and the deadline is strictly enforced, though postmarks are accepted if you mail your appeal. You must act quickly once you see the publication notice, as missing this 30-day window means waiting another four years for your township's next reassessment cycle.

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

You can file your property tax appeal online through the Sangamon County Property Tax portal at https://tax.co.sangamon.il.us/. The online filing system opens July 1 each year. To file online, search for your property by parcel number or address, then select the assessment complaint option. You'll need to submit your complaint form along with all supporting evidence such as comparable sales data, photos, or appraisals. Note that you must still file within 30 days of the publication of your township's assessment changes. If you prefer, you can also file by mail or in person at the Sangamon County Complex, Room 210, 200 S. 9th Street, Springfield.

What is the General Homestead Exemption worth in Sangamon County?

The General Homestead Exemption in Sangamon County reduces your Equalized Assessed Value (EAV) by up to $6,000 for owner-occupied residential property. At Sangamon County's effective tax rate of 1.87%, this exemption saves approximately $112 per year on your property tax bill. You must live in the home as your primary residence to qualify. The exemption is required with new ownership and generally must be applied for by the Board of Review complaint deadline in late fall. You can obtain the application form through the Sangamon County property tax website or from the Supervisor of Assessments office at Room 210, 200 S. 9th Street, Springfield.

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

The amount you can save depends on how much your assessment is reduced. For example, if you successfully reduce your assessed value by $10,000 at Sangamon 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, making the appeal process worthwhile for many homeowners.

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

For a successful property tax appeal in Sangamon County, you need compelling evidence that your property is overassessed compared to its market value. The strongest evidence includes comparable sales (comps) of similar properties that sold recently in your area, showing that homes like yours are selling for less than your assessed market value. You should also gather a recent independent appraisal if available, photographs showing property condition issues or defects, and repair estimates for any structural problems. The Board of Review wants proof that your property's market value on January 1 of the tax year is lower than what the assessor claims. You must submit 5 copies of all your evidence along with the assessment complaint form.

What is the Senior Assessment Freeze Exemption and how much can it save me?

The Senior Assessment Freeze Exemption is one of the most valuable property tax exemptions available in Sangamon County. This exemption freezes your home's Equalized Assessed Value (EAV) at its base-year level, preventing any increase in that value due to inflation or rising market values. To qualify, at least one owner must be 65 years or older, and your household income must be at or below $65,000. You must file an annual application using Form PTAX-340 with the Supervisor of Assessments. While your tax bill may still increase if tax rates go up or you make improvements, the freeze prevents the assessment base from increasing, potentially saving thousands of dollars over time as property values rise around you.

What happens after I file my appeal with the Sangamon County Board of Review?

After you file your appeal with the Sangamon County Board of Review, the Board will schedule a hearing where you can present your evidence. At the hearing, a board member will review your evidence against the assessor's record. You should bring printed comparable sales data, a one-page summary of your argument, and photos of any condition problems. The Board will consider both your evidence and the assessor's valuation before making a decision. After the hearing, the Board will issue a written decision that will be mailed to you. If you disagree with the Board's decision, you have 30 days from receiving their written decision to appeal to the Illinois Property Tax Appeal Board (PTAB) for a second-level review.

Can I appeal to a higher level 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 can appeal to the Illinois Property Tax Appeal Board (PTAB) within 30 days of receiving the Board's written decision. The PTAB is a quasi-judicial state agency that provides a de novo review, meaning you get a fresh review of the matter and can provide additional evidence not presented at the county level. You must file using the prescribed PTAB form (available at www.ptab.illinois.gov) along with all evidence and a copy of the Board of Review decision. If you disagree with the PTAB decision, you can further appeal to circuit court within 35 days. Note that you must pay your property taxes on time even while appeals are pending.

Official Resources

Sangamon County Property Tax and E-Payment Portal →

Official portal to search property records, view assessments, file appeals online, and pay taxes.

Sangamon County Supervisor of Assessments →

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

Illinois Property Tax Appeal Board (PTAB) →

State-level appeal board with forms, filing instructions, and information for second-level appeals.

Illinois Department of Revenue - Property Tax Information →

State resources on property tax exemptions, appeals process, and assessment information.

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

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← All Illinois property tax appeal info

Sources: https://www.appealdesk.com/appeals/illinois/sangamon | https://tax.co.sangamon.il.us/ | https://sangamonil.gov/departments/s-z/supervisor-of-assessments | https://taxfightback.com/articles/state-guides/sangamon-county-property-tax | https://www.tax-rates.org/illinois/sangamon_county_property_tax | https://www.ptab.illinois.gov/

Last verified: 2026-07-24