Waukesha County property tax appeals
Appeal Season is a property tax appeal co-pilot. We are expanding county by county to high-tax areas like Waukesha County. We are not there yet, so we cannot check a Wisconsin assessment today. Leave your email and we will tell you the day we cover Waukesha County, and nothing else.
Wisconsin assesses at the city, village, or town level, not the county. You review your assessment at open book, then file a written objection with your local board of review, after giving 48 hours notice of intent. An appeal helps when sales show your assessment is above market.
- Recent sales show your assessment is above what your home would sell for.
- The record has an error in your home’s size, condition, or features.
- You give notice of intent at least 48 hours before the board of review’s first meeting and file your objection in the first two hours.
- Your bill went up but your assessment is fair. A higher bill often comes from the tax rate, not the assessment.
- You have no market evidence. The board reviews your home’s value, not the size of your bill.
Read the full explanation
In Wisconsin, your city, village, or town, not the county, assesses your home, and you challenge the value through your local board of review. First you can review your assessment during the open book period, then you file a written objection with the board. You must give the municipal clerk notice of your intent at least 48 hours before the board’s first meeting, and file your objection within the first two hours of that meeting. If the board denies you, you can appeal to circuit court. An appeal helps when sales show your assessment is above market, or the record is wrong. It usually will not help just because your bill went up. This is general information, not tax advice.
Source: Wisconsin Department of Revenue · checked 2026-07-18. We're preparing coverage here and will publish Waukesha County's own verified schedule once our review of the county's records is complete.
- Filing window:
- Give your municipal clerk notice of intent to object at least 48 hours before your local board of review’s first meeting, then file your written objection within the first two hours of that meeting. Wisconsin assesses at the city, village, or town level, not the county, so check your municipality for its board of review dates.
- Where to file:
- Your municipal Board of Review (first level), then circuit court
- Filing fee:
- Filing an objection with the board of review is free.
- County portal:
- www.revenue.wi.gov/Pages/FAQS/slf-bor.aspx
Verified against official sources, approved 2026-07-18.