Lake County · Illinois
Warren Township property tax appeals
A Warren 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 Warren Township, Lake County Board of Review: Sep 8, 2027 – Oct 6, 2027 (not an official date).
- Next deadline
- Expected Sep 8, 2027 – Oct 6, 2027
- Forecast, not an official date
- Warren Township · Lake County Board of Review
- Source: Assessment Appeal Information | Warren Township, ILLast checked
Check a Warren Township home for free
Enter the address or parcel number from your notice. We compare the assessment with similar homes and show the numbers, whatever they are. You decide and file yourself.
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 Warren, Lake County or any government agency.
When and where do I file a Warren Township property tax appeal?
Who hears a Warren 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 Warren Township filing windows are coming up?
| Closes | Area | Who hears it | Status |
|---|---|---|---|
| Expected Sep 8, 2027 – Oct 6, 2027 | Warren Township | Lake County Board of Review | Forecast, not an official date |
When were past Warren Township deadlines?
| Tax year | Window | Office |
|---|---|---|
| 2026 | Closed September 8, 2026 | Warren · Lake County Board of Review |
| 2025 | Closed October 6, 2025 | Warren · Lake County Board of Review |
When is the Warren appeal deadline?
Lake County Board of Review: Expected around September 2027 (between September 8, 2027 and October 6, 2027), based on past deadlines for tax years 2025 and 2026 (predicted, not yet announced). We'll confirm it when the county posts it.
- Deadline detailNewspaper
- Warren Township's assessments are published in the Lake County News Sun; the township lists its 2026 publication date as August 8.[1]
How do I file a property tax appeal in Warren?
Warren Township owners should contact the township assessor's office (walk-ins welcome) about factual errors, a recent purchase below the assessment, or help with SmartFile; other appeals go to the Board of Review.
- Informal review
- Warren Township owners should contact the township assessor's office (walk-ins welcome) about factual errors, a recent purchase below the assessment, or help with SmartFile; other appeals go to the Board of Review.[1]
Who can answer questions about my assessment?
Address: The Warren Township Assessor's office is at 17801 W. Washington St., Gurnee, IL 60031 (Warren Township Center). Hours: The Warren Township Assessor's office is open Monday to Friday, 8 a.m. to 4 p.m.
- ContactAddress
- The Warren Township Assessor's office is at 17801 W. Washington St., Gurnee, IL 60031 (Warren Township Center).[3]
- ContactHours
- The Warren Township Assessor's office is open Monday to Friday, 8 a.m. to 4 p.m.[3]
- ContactOffice
- Phone the Warren Township Assessor's office at (847) 244-1101, ext. 201 (fax 847-244-8521).[3]
- ContactWebsite
- The Warren Township Assessor's page is warrentownship.net/158/Assessors-Office.[3]
What do Warren Township property taxes and assessments look like?
Figures from public records and the Census, each with its source. They describe the county's homes as a group, not the value of any one home.
How Warren Township home assessments are spread
Warren Township compared with other townships
- Vernon$157,997
- Libertyville$143,804
- Fremont$133,722
- Newport$117,566
- Warren$111,937
- Antioch$110,388
- Wauconda$98,052
- Lake Villa$88,297
- Lake Villa$86,343
Ranked 10 of 17; showing the 9 nearest in rank.
Median assessed value by township: highest Moraine ($350,406), lowest Waukegan ($65,974).
How often is property reassessed in Warren?
Warren Township reassesses on a four-year (quadrennial) cycle, last in 2023; Board of Review reductions do not carry forward into a quadrennial year.
- Reassessment cycle
- Warren Township reassesses on a four-year (quadrennial) cycle, last in 2023; Board of Review reductions do not carry forward into a quadrennial year.[2]
Other places nearby
- Newport TownshipFree check available
- Shields TownshipFree check available
- Vernon TownshipFree check available
- Wauconda TownshipFree check available
- Waukegan TownshipFree check available
- West Deerfield TownshipFree check available
Where do these facts come from?
- [1]Assessment Appeal Information | Warren Township, ILOfficial guide or FAQ · last checked Oct 1, 2026
- [2]What's a QUAD? - Warren Township Assessor's Office (PDF)Official guide or FAQ · last checked Oct 1, 2026
- [3]Warren Township Assessor's Office | Warren Township, ILOfficial guide or FAQ · last checked Oct 1, 2026
- [4]2026 Filing Deadlines and Decision Mailed Dates - Lake County Board of ReviewOfficial notice, form, calendar or rules · last checked Sep 28, 2026
- 5.County open data: lake assessmentsRetrieved Sep 27, 2026; aggregated by us for the charts above.
- 6.County open data: lake parcelsRetrieved Sep 27, 2026; aggregated by us for the charts above.
- 7.County open data: lake parcelsRetrieved Sep 27, 2026; aggregated by us for the charts above.
Not affiliated with Warren Township or any government agency. Not legal advice. Not an appraisal.