Downers Grove Township property tax appeal (DuPage County, IL)
2026 appeal deadline
Not posted yet — watch the county's assessment status page
You have 30 days after your township's assessment roll is published in the newspaper to file an appeal with the DuPage County Board of Review. Appeals filed outside that window are rejected.
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 Downers Grove Township
- 1
Check your township's publication date
Each DuPage township publishes its assessment roll in a local newspaper on its own schedule. Your 30-day appeal window runs from that publication date — the deadline for your township is on the county's assessment status page.
- 2
Talk to your township assessor first
The Board of Review strongly recommends reviewing your property record card with your township assessor before filing. Errors can often be corrected without an appeal — but the filing window is not extended while you talk.
- 3
Gather comparables
Evidence should include three or more comparable properties, preferably in your neighborhood. For a market-value appeal use recent sales; for a uniformity appeal use similar homes with similar assessments.
- 4
File online with SmartFile
Create an account on the county's SmartFile e-filing system and submit your appeal before your township's deadline. Residential and commercial instructions are on the county site.
- 5
Attend your hearing
The Board reviews your evidence and the assessor's evidence and mails a decision. If you disagree, you can appeal to the Illinois Property Tax Appeal Board (PTAB) within 30 days of the decision notice.
Good to know
- Talking to the Downers Grove 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
- DuPage County Supervisor of Assessments
- DuPage County Board of Review
- DuPage SmartFile e-filing system
- Illinois Property Tax Appeal Board (PTAB)
- Illinois Department of Revenue — property tax
Other DuPage County townships: Addison · Bloomingdale · Lisle · Milton · Naperville · Wayne · Winfield · York
NeighborComp is a private company, not affiliated with DuPage County or any government office. Dates come from official county sources; always confirm on the county site before filing.