Grant Township property tax appeal (Lake County, IL)
2026 appeal deadline
30 days after your township's publication date — notices mail mid to late summer
You have 30 days from your township's assessment publication date to file an appeal with the Lake County Board of Review. The exact deadline for your property is printed on your assessment notice.
Documents to gather
- Your assessment notice or the township's published assessed value for your parcel (PIN)
- The county's appeal/complaint form, completed and signed (filed online where the county requires e-filing)
- 3–5 comparable homes nearby with lower assessed values per square foot (PIN, address, size, assessed value)
- A recent appraisal or purchase closing statement, if you bought within about 3 years
- Photos of condition problems or errors on your property record (wrong square footage, bathrooms, basement)
How to file in Grant Township
- 1
Read your assessment notice
Lake County mails assessment notices in mid to late summer. Your notice shows your assessed value and your exact filing deadline.
- 2
Contact your township assessor
Discuss your valuation with your local township assessor before filing — many issues can be resolved without a formal appeal.
- 3
File online — it's required
All Lake County assessment appeals must be filed electronically through the SmartFile E-Filing Portal. No attorney is required for a residential appeal.
- 4
Check if your township uses a different system
Cuba, Ela, Grant, Libertyville, Shields and Vernon townships use a separate software system — follow the special instructions on the county's online appeal page if you're in one of them.
- 5
Get the Board's decision
The Board of Review reviews your evidence and mails its decision. You can appeal further to the Illinois Property Tax Appeal Board (PTAB).
Good to know
- Grant Township uses its own assessment office system — check the Lake County site for how Grant complaints are filed.
- Talking to the Grant Township Assessor first is free and can fix simple record errors before you file.
- If the Board of Review denies you, you can appeal to the Illinois Property Tax Appeal Board (PTAB) within 30 days of the Board's written decision.
Sources
- Lake County Chief County Assessment Office
- Lake County Board of Review
- Lake County SmartFile E-Filing Portal
- Illinois Property Tax Appeal Board (PTAB)
- Illinois Department of Revenue — property tax
Other Lake County townships: Antioch · Avon · Benton · Cuba · Ela · Fremont · Lake Villa · Libertyville · Moraine · Newport · Shields · Vernon · Warren · Wauconda · Waukegan · West Deerfield · Zion
NeighborComp is a private company, not affiliated with Lake County or any government office. Dates come from official county sources; always confirm on the county site before filing.