Wisconsin Property Tax Appeal Guides
Browse source-reviewed property tax appeal guides for Wisconsin. County deadlines, filing methods, and available records can differ by county and tax year.
Each published guide identifies the public sources used for its deadline and filing summary. Confirm current requirements with the official filing authority before submitting anything.
How Wisconsin assessment appeals generally work (state framework reviewed 2026-08-03 from official Wisconsin sources): Municipal assessors value most taxable property under Wisconsin law and the Wisconsin Property Assessment Manual. Residential, commercial, forest, and other market-value classes are generally valued at full value; agricultural land uses use-value, undeveloped and agricultural forest land generally use 50% of full value, and local assessment levels can differ from full value. A property owner may first discuss the assessment with the assessor during the municipality's Open Book session, then files a formal objection with the municipal Board of Review. Later review may proceed through the specific Department of Revenue or circuit-court route allowed by the decision and statute.
Wisconsin deadline framework: Municipal Open Book and Board of Review dates vary. A property owner generally gives the Board of Review clerk written or oral notice of intent at least 48 hours before the first scheduled meeting and files the signed real-property objection form before or during the first two hours of that meeting. Waivers, late sessions, first-class-city procedures, manufacturing property, and later-review routes have distinct requirements.
Local variation in Wisconsin: Towns, villages, and cities publish separate Open Book and Board of Review dates, clerk contacts, filing practices, and hearing arrangements. Assessment level, revaluation status, first-class-city procedure, manufacturing assessment, agricultural classes, electronic filing acceptance, and later-review options vary materially.
Before relying on a date: Resolve the municipality, county, assessment year, class, local assessment level, revaluation status, and whether the property is locally or state assessed, then verify the current Open Book and Board of Review calendar, clerk, notice-of-intent cutoff, PA-115A delivery method, hearing requirements, determination notice, and available later-review route before presenting filing guidance.
State source: Wisconsin Department of Revenue, Open Book and Board of Review Calendar, https://www.revenue.wi.gov/Pages/Municipalities/bor-calendar.aspx. Reviewed 2026-08-03.
State source: Wisconsin Department of Revenue, Board of Review — Filing Objections and Forms, https://www.revenue.wi.gov/Pages/FAQS/slf-bor.aspx. Reviewed 2026-08-03.
State source: Wisconsin Department of Revenue, 2026 Wisconsin Property Assessment Manual, https://www.revenue.wi.gov/Pages/HTML/govpub.aspx. Reviewed 2026-08-03.
Dane County: 2026 deadline guidance is Municipality-specific 2026 Open Book and Board of Review dates. Guide: https://fairpath.app/property-tax-appeal/wisconsin/dane-county
Milwaukee County: 2026 deadline guidance is Varies by Milwaukee County municipality. Guide: https://fairpath.app/property-tax-appeal/wisconsin/milwaukee-county
Source: Wisconsin Department of Revenue, 2026 Guide for Property Owners, https://www.revenue.wi.gov/DOR%20Publications/pb060.pdf. Reviewed 2026-08-09.
Source: Wisconsin Department of Revenue, Board of Review FAQ, https://www.revenue.wi.gov/Pages/FAQS/slf-bor.aspx. Reviewed 2026-09-14.
Source: Wisconsin Department of Revenue, Open Book and Board of Review Calendar, https://www.revenue.wi.gov/Pages/Municipalities/bor-calendar.aspx. Reviewed 2026-09-14.
Source: Wisconsin Department of Revenue, Property Assessment Forms, https://www.revenue.wi.gov/Pages/Form/govasst-Home.aspx. Reviewed 2026-08-09.
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