Property Assessment

Service is provided by:

Action Appraisers & Consultants, Inc.
PO Box 557
Kaukauna, Wisconsin  54130-0557  
Phone Number:  920-766-7323


Office Hours:  Mon-Thurs 8:00 am to 4:00 pm, Fridays 8:00 am to 3:00 pm


Action Appraisers retains, updates, and maintains all property assessment records for the Town of Oshkosh (real estate and personal property).


General assessment information can be found at the Winnebago County website under property inquiries or GIS


Or go to Action Appraiser's data information source at:

Revaluation of Properties in 2024

12/15/2023; The latest information is that the new assessment value notices to all property owners will be mailed in late summer/early fall of 2024 with new assessment values. This timeline is subject to change if necessary.

Our town assessor prefers to wait until the State’s 2024 equalized value numbers are known, which is typically in early August. After that point, the last part is to finish and complete the entry of assessments, and the notices will be prepared and mailed. Instructions on the process will be included in the mailed notice along with dates for Open Book and Board of Review.

A guide to property owners is available now on the State’s website at

To be notified of any changes, we recommend subscribing to News & Notices on our website. Notice alerts will be sent to you by your preference; email and/or text message.

Final assessment notices will be mailed to the same address as to where the tax bills are mailed. If your mailing address is wrong/incorrect on your tax bill, please do the following:

Submit form and make appointment with town clerk

Submit form and make appointment with town clerk