What we do

We appraise or value real and personal property at fair market value for tax purposes. We do not set or collect taxes. We handle three major duties:

  • to discover
  • to list
  • to value all taxable property within Wauwatosa

Contact us with questions about a property, property assessments, or related topics. You can also use the Property Search tool to research properties.

Important Dates

Date Event
January 1 Assessment Date: All property is assessed as it existed on this date.
March 1 Last day to file exemption request forms and personal property returns.
Late April/Early May Assessment notices mailed to property owners and assessment roll available for inspection.
May 4 - 15, 2020  Open Book Review Period
Starts May 29, 2020  Board of Review

Open Book Review Period

Every year, the assessor's office prepares a preliminary assessment roll. This reflects property values as of January 1 each year.

The Open Book review period is set aside to answer questions posed by property owners and to correct obvious clerical errors that were made in compiling the assessment roll.

This year's Open Book is May 4 - 15, 2020.

Roughly 4% of Wauwatosa property owners will receive a change of assessment notice.

Learn more about the Open Book Review Period.

Revaluation Year

In 2019, our Assessor’s Office completed a revaluation. This is a city-wide review of all property assessments. We make value adjustments where necessary to guarantee that all property is assessed at market value. This ensures that taxes are distributed equitably. Learn more about the revaluation.

What Does an Assessor Do?

Helpful Links & Forms

Our Links

Wisconsin Department of Revenue Information


Once the assessment roll affidavit is signed, values can only be changed by the local Board of Review, an appeal to the Wisconsin Department of Revenue, or through litigation.


Assessed values are established as of January 1 according Chapter 70 of the Wisconsin Statutes, and each tax assessment is absolute.

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