To assess taxable residential and commercial real and personal property fairly and accurately in accordance with Wisconsin state statutes and the Wisconsin Property Assessment Manual; the Wisconsin Department of Revenue (DOR) assesses all manufacturing real and personal property. It is our duty to be ambassadors of the city; we will treat everyone we encounter with courtesy and respect. Furthermore, it is our responsibility to provide valuable, responsive, and cost-effective services to the citizens of Sun Prairie.
2026 revaluation
2026 will be a revaluation year for all properties in the City of Sun Prairie and the Assessor's Office will be changing all assessments to reflect market value on all properties as of January 1. Market value is determined using the arm's-length sales that have occurred in Sun Prairie.
The Assessor's Office will be reviewing descriptions on all properties. We will not be doing interior inspections on all properties. We anticipate the 2026 values to be sent out in late July. Please note that increasing the assessed values does not mean everyone will have higher taxes.
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City of Sun Prairie
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