DuPage County · Illinois
Addison Township property tax appeals
An Addison Township property tax appeal starts with the DuPage County Board of Review, then the Illinois Property Tax Appeal Board. We are still checking this season's dates against official sources, so confirm the deadline on your assessment notice or the office's website.
Source: DuPage County Board of ReviewLast checked
Check an Addison 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 DuPage CountyEvery appeal date in DuPage County
- Next deadline
- Not verified yet: check your notice
- Where to file first
- DuPage County Board of Review
- Our coverage
- Free check available
- Independent guide — not affiliated with Addison, DuPage County or any government agency.
When and where do I file an Addison Township property tax appeal?
Who hears an Addison Township appeal?
The stages in order. We are not affiliated with any of these offices.
DuPage County Board of Review
Illinois Property Tax Appeal Board
When is the Addison appeal deadline?
Newspaper: Addison Township's 2026 assessment changes were published in Addison Suburban Life, Elmhurst Suburban Life (published 2026-09-11).
- Deadline detailNewspaper
- Addison Township's 2026 assessment changes were published in Addison Suburban Life, Elmhurst Suburban Life (published 2026-09-11).[1]
Who can answer questions about my assessment?
Address: Addison Township's offices are at 401 N. Addison Road, Addison, IL 60101 (phone 630-530-8161). Hours: The Addison Township Assessor's office helps in person Monday to Friday 9 a.m. to 3 p.m. and by phone 8 a.m. to 4:30 p.m.
- ContactAddress
- Addison Township's offices are at 401 N. Addison Road, Addison, IL 60101 (phone 630-530-8161).[2]
- ContactHours
- The Addison Township Assessor's office helps in person Monday to Friday 9 a.m. to 3 p.m. and by phone 8 a.m. to 4:30 p.m.[2]
- ContactOffice
- The Addison Township Assessor's office is at 401 N. Addison Road, Addison, IL 60101; phone 630-530-8161, e-mail assessor@addisontownship.com.[3]
- ContactWebsite
- The Addison Township Assessor's pages are at addisontownship.com/assessors-office/, with a searchable online database.[3]
What do Addison 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 often is property reassessed in Addison?
Addison Township, like all DuPage townships, is generally reassessed every four years (2019 and 2023 were general reassessment years; the next is 2027). Township multiplier: The 2026 Supervisor of Assessments equalization factor for Addison Township (DuPage County) is 1.0590.
- Reassessment cycle
- Addison Township, like all DuPage townships, is generally reassessed every four years (2019 and 2023 were general reassessment years; the next is 2027).[1]
- State equalization factorTownship multiplier
- The 2026 Supervisor of Assessments equalization factor for Addison Township (DuPage County) is 1.0590.[1]
What do home values and property taxes look like in Addison?
Addison Township (DuPage County) parcel numbers begin with 03.
- Parcel number (PIN) prefix
- Addison Township (DuPage County) parcel numbers begin with 03.[1]
Other places nearby
- Bloomingdale TownshipFree check available
- Naperville TownshipFree check available
- Wayne TownshipFree check available
Where do these facts come from?
- [1]Assessment Status | DuPage Co, IL (Supervisor of Assessments)Official notice, form, calendar or rules · last checked Oct 1, 2026
- [2]Assessors Office - Addison TownshipOfficial guide or FAQ · last checked Oct 1, 2026
- [3]Township Assessor Directory | DuPage Co, ILOfficial notice, form, calendar or rules · last checked Oct 1, 2026
- 4.County open data: dupage assessmentsRetrieved Sep 27, 2026; aggregated by us for the charts above.
- 5.County open data: dupage assessmentsRetrieved Sep 27, 2026; aggregated by us for the charts above.
- 6.County open data: dupage parcelsRetrieved Sep 27, 2026; aggregated by us for the charts above.
Not affiliated with Addison Township or any government agency. Not legal advice. Not an appraisal.