Assessor's Office
Contact Information
Office Hours: 8:00 AM to 4:30 PM
Phone Number: (920) 236-5070
Email: assessor@oshkoshwi.gov
Address:
DEAN PETERS
CITY ASSESSOR
PO BOX 1130
OSHKOSH, WI 54903-1130
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2026 Open Book and Board of Review
2026 Notice of Changed Assessments will be mailed on April 13, 2026. If your assessment did not change from the previous tax year, you will not receive a Notice of Changed Assessment.
Open Book refers to a period of time when the completed assessment roll is open for examination. This period of time is an opportunity to discuss your assessed value with the assessor. You may request a change to your assessed value during the Open Book. The assessor may consider such a request based on a review of reasoning and evidence. Please call 920-236-5070 in advance to set up an appointment for the Open Book. We cannot guarantee an Open Book meeting unless you schedule an appointment in advance.
2026 Open Book for residential properties
| Date |
Time |
| Wednesday, April 22, 2026 |
8:30 AM to 4:00 PM at City Hall, Room 208 |
| Thursday, April 23, 2026 |
8:30 AM to 4:00 PM at City Hall, Room 208 |
| Monday, April 27, 2026 |
8:30 AM to 4:00 PM at City Hall, Room 208 |
| Tuesday, April 28, 2026 |
8:30 AM to 4:00 PM at City Hall, Room 208 |
2026 Open Book for commercial properties
| Date |
Time |
| Wednesday, April 22, 2026 |
8:30 AM to 4:00 PM over the phone |
| Tuesday, April 28, 2026 |
8:30 AM to 4:00 PM at City Hall, Room 208 |
The Board of Review meets annually to hear any final objections to the current year’s assessments. It is recommended that you contact the assessor to attempt to resolve any disputed assessment before making a formal appeal at the Board of Review. If you wish to enter a formal appeal, you must give notice of your intent to appeal by contacting the City Clerk at least 48 hours before the Board of Review begins. Please contact the City Clerk, Darla Salinas, at 920-236-5014 or dsalinas@oshkoshwi.gov, at least 48 hours prior to the Board of Review to obtain an objection form and to make an appointment for the Board of Review. Failure to provide 48 hours advance notice to the City Clerk may result in denial of a hearing at the Board of Review.
2026 Board of Review for all properties
| Date |
Time |
| Thursday, May 21, 2026* |
9:00 AM to 11:00 AM at City Hall, Room 406 |
*You must contact the City Clerk no later than 9:00 AM on Tuesday, May 19th to make an appeal at the Board of Review. You may call the City Clerk at 920-236-5014 or email them at dsalinas@oshkoshwi.gov.
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Assessment Resources
Frequently Asked Questions
2026 Guide for Property Owners
(external)
Legal Notice
Notice of Open Book & Board of Review
Please take notice that the Assessor has certain statutory authority to enter land as described in Wis. Stats. § 943.13 and
§ 943.15. The ability to enter land is subject to several qualifications and limitations, as described within the foregoing statutes.
Copies of the applicable statutes can be obtained at public depositories throughout the State of Wisconsin, and from the State of Wisconsin Legislative Reference Bureau website(external) or a copy may be obtained from the City Clerk upon payment of applicable copying charges.