Lake County · Illinois
Avon Township property tax appeals
An Avon Township property tax appeal starts with the Lake County Board of Review, then the Illinois Property Tax Appeal Board. This season's deadline has not been announced yet. Our forecast for Avon Township, Lake County Board of Review: Sep 22, 2027 – Sep 28, 2027 (not an official date).
- Next deadline
- Expected Sep 22, 2027 – Sep 28, 2027
- Forecast, not an official date
- Avon Township · Lake County Board of Review
- Source: Assessor - Avon TownshipLast checked
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Part of Lake CountyEvery appeal date in Lake County
- Where to file first
- Lake County Board of Review
- Our coverage
- Free check available
- Independent guide — not affiliated with Avon, Lake County or any government agency.
When and where do I file an Avon Township property tax appeal?
Who hears an Avon Township appeal?
The stages in order. We are not affiliated with any of these offices.
Lake County Board of Review
Illinois Property Tax Appeal Board
Which Avon Township filing windows are coming up?
| Closes | Area | Who hears it | Status |
|---|---|---|---|
| Expected Sep 22, 2027 – Sep 28, 2027 | Avon Township | Lake County Board of Review | Forecast, not an official date |
When were past Avon Township deadlines?
| Tax year | Window | Office |
|---|---|---|
| 2026 | Closed September 28, 2026 | Avon · Lake County Board of Review |
| 2025 | Closed September 22, 2025 | Avon · Lake County Board of Review |
When is the Avon appeal deadline?
Lake County Board of Review: Expected around September 2027 (between September 22, 2027 and September 28, 2027), based on past deadlines for tax years 2025 and 2026 (predicted, not yet announced). We'll confirm it when the county posts it.
How do I file a property tax appeal in Avon?
Avon Township owners who appeal must file electronically through the SmartFile E-Filing Portal. Avon Township owners are encouraged to contact the Avon Township Assessor's office to discuss their concerns before filing a formal Board of Review appeal.
- How to file
- Avon Township owners who appeal must file electronically through the SmartFile E-Filing Portal.[1]
- Informal review
- Avon Township owners are encouraged to contact the Avon Township Assessor's office to discuss their concerns before filing a formal Board of Review appeal.[1]
- Informal reviewRequired first
- For factual-error and commercial vacancy appeals, the Board of Review requires Avon Township owners to contact the Avon Township Assessor's office first.[1]
- Hearings
- Avon Township appeals are heard by the Board of Review in person, by video (Zoom preferred), by phone, or decided by letter on written evidence; hearings are scheduled every 15 minutes.[1]
Who can answer questions about my assessment?
Hours: The Avon Township Assessor's office is open Monday to Thursday 8:30 a.m. to 4 p.m. and Friday 8:30 a.m. to 2 p.m. (Fridays to noon from Memorial Day to Labor Day). Office: The Avon Township Assessor's office is at 427 E. Washington St., Round Lake Park, IL 60073; phone 847-546-2146.
- ContactHours
- The Avon Township Assessor's office is open Monday to Thursday 8:30 a.m. to 4 p.m. and Friday 8:30 a.m. to 2 p.m. (Fridays to noon from Memorial Day to Labor Day).[1]
- ContactOffice
- The Avon Township Assessor's office is at 427 E. Washington St., Round Lake Park, IL 60073; phone 847-546-2146.[1]
- ContactWebsite
- The Avon Township Assessor's office page is www.avonil.us/assessor/ on the Avon Township website.[1]
Other places nearby
- Antioch TownshipFree check available
- Benton TownshipFree check available
- Cuba TownshipFree check available
- Ela TownshipFree check available
Where do these facts come from?
- [1]Assessor - Avon TownshipOfficial guide or FAQ · last checked Oct 1, 2026
- [2]2026 Filing Deadlines and Decision Mailed Dates - Lake County Board of ReviewOfficial notice, form, calendar or rules · last checked Sep 28, 2026
- 3.County open data: lake assessmentsRetrieved Sep 27, 2026; aggregated by us for the charts above.
- 4.County open data: lake parcelsRetrieved Sep 27, 2026; aggregated by us for the charts above.
- 5.County open data: lake parcelsRetrieved Sep 27, 2026; aggregated by us for the charts above.
Not affiliated with Avon Township or any government agency. Not legal advice. Not an appraisal.