Assessor's Office


  • January 1:  All property is assessed as it existed on January 1st
  • March 1:  Last day to file Property Tax Exemption request 
  • April 19:  Notice of Assessments will be mailed (if applicable)
  • May 6 - 10:  Open Book by appointment only, via in person, video or tele-conference
  • No later than May 6:  Completed 2024 Assessment Rolls delivered to City Clerk
  • May (dates tbd):  Board of Review
  • December:  Tax bills are calculated and mailed.


The assessment represents the assessed value of the property rather than its full market value. These links will be updated April 24, 2023 when the Assessor submits the rolls to the Clerk's Office. 


First, discuss with your local assessor – minor errors and misunderstandings can often be corrected with the assessor instead of making a formal appeal.  Should you have any questions regarding this change in assessed value, please contact the City Assessor's Office by email or if no access to email, then call 414-302-8230.

To file a formal appeal give notice of your intent to appeal by contacting the City Clerk at least 48 hours before the Board of Review begins. Complete and file your Objection to Real or Personal Property Assessment form with the Clerk no later than the first two hours of the Board of Review’s meeting. Make sure you file a completed form or the Board of Review may not review your appeal. You can contact the City Clerk at 414-302-8220 or email

The Board of Review operates similarly to a court of law. Its function is not one of valuation, but of determining the validity of the facts presented before it. You or your representative may provide testimony to the Board in objection to the assessment. You must be able to prove that the assessment is inequitable, or is too high compared to the general level of assessment in West Allis.



City Hall OPEN  

The one-stop-shop Customer Service Center for residents is now open from 11:30 a.m. to 4:30 p.m., Monday through Friday. Oftentimes, coming to City Hall and knowing which office to visit or how to find that office can be challenging for guests. Our customer service center will welcome you and be able to address inter-departmental needs all in one place. Access to the building will only be available through the south entrance, which will lead you directly to the Customer Service Center.   

During this time, please submit any questions or submissions: Requests for Review, Income Surveys, Personal Property returns either by e-maildropped off at the Customer Service Center or in the City Hall drop-box (which is to the right of City Hall Main Entrance Doors (Parking Lot level).  

Services Provided calculator numbers

The City of West Allis Assessor’s Office is responsible for the maintenance of ownership information, and the valuation of all taxable property within the City in accordance with The Wisconsin Property Assessment Manual (PDF) and Chapter 70 of the Wisconsin State Statutes. It is our primary responsibility to provide uniform property values so that the burden of taxes is distributed as fairly and equitably as possible under current law.

Though assessed values are used to calculate tax bills, a change in assessed value does not necessarily equate to an increase or decrease in a tax bill. It is important to note that the overall tax burden is a function of the tax levy approved by taxing jurisdictions whereas the assessed value is a marker for the share of that burden. Property owners may see an increase in assessed value if new construction occurred or new improvements were made to the property. 

To be clear, the amount a property owner will pay on the tax bill is primarily determined by the tax levy. The tax levy is set by the various taxing jurisdictions including the City of West Allis, West Allis/West Milwaukee School District, Metropolitan Milwaukee Sewage District (MMSD), Milwaukee Area Technical College (MATC), Milwaukee County, and the State of Wisconsin.

Assessor’s Responsibility

Since 1848 in Wisconsin, "...taxation shall be uniform...", as required under the Preamble to the State Constitution.

It is the Assessor’s primary responsibility under case law, statute and our State Constitution to produce equitable and uniform property assessments in order to ensure that the burden of property tax is distributed fairly and equitably among all property owners.

It makes sense to most people that for property taxes to be considered "fair", similar properties should have a similar tax burden; Overall property assessments should make sense and be consistent with each other.

An easy way to understand this is when comparing homes with one another. The newest, biggest and best home in West Allis should have the highest assessment and the oldest, smallest and most run down house should have the lowest, with all other houses somewhere in between.