Assessor / Board of Review

Questions about Your Assessment?

Accurate Appraisal LLC

Phone: (800) 770-3927 or (920) 749-8098
Fax: (920) 749-8099

Email: [email protected]

Office Hours at Town Hall upon request

PO Box 415

Menasha WI 54952

Phone: 920-749-8098

Toll Free: 1-800-770-3927

Who Are Assessors? Why are My Property Taxes so High?

What is a Revaluation?

Options for Scheduling an Appointment for Open Book

If you have a question about the NEW VALUE of your property, and wish to talk to Accurate Appraisal to discuss the NEW VALUE of your property please click the above link to set an appointment.

Not Tech Savvy?  Please call Accurate Appraisal anytime (even on the weekend) and leave a message. Be sure to leave your first and last name, your  phone number AND your email address so they can confirm your appointment.

Call 1-800-770-3927

Email: [email protected]

Online Reservation:

Accurate is "technically off" on Friday and through the weekends, however, as of 1:20pm on Friday, June 11, we contacted them and they have assured us that they are answering their voicemails and taking appointments.

You will receive instructions once your appointment is confirmed.

They are not accepting face-to-face appointments.

All appointments on Monday and Tuesday's Open Book are via phone.

Can't Make an Appointment on Monday or Tuesday?

No worries.  Give Accurate a call or email and contact them as soon as possible to make an appointment.


Open Book

"In Person"

Town Hall - 5621 Town Hall Road, Delavan

Monday June 14th from 3-5 pm

*No Appointment Schedule Available for "In-Person"


The roll book will be available, however, because of Covid protocols, we will only be taking appointments

for telephone open book, not for in person.


Via Telephone

Monday, June 14 @12pm-7pm

Tuesday June 15th from 9am - 3pm


Open book is a conference, either face-to-face or over the phone, with an assessor to discuss the value of your property. You have until 48 hours before Board of Review to contact the assessor about your new value. When available you can set an appointment with an assessor here:

Board of Review

Town Hall - 5621 Town Hall Road, Delavan

Thursday July 22nd from 2-4 pm


Board of Review functions like court and is required to evaluate evidence based on facts. You or your representative must provide factual evidence that your property is inequitably assessed. The burden of proof is solely on the taxpayer.

The assessor’s value is presumed correct by State Law until proven otherwise.


Search for your property record information here:

2021 Property Revaluation

The Town of Delavan will be performing a market revaluation in 2021. The last time Delavan performed a revaluation of all property was in 2018. Since then, the market has changed and assessed values no longer reflect the current market.

The state of Wisconsin is a Market Value state. This means property values are required to mirror the fair market value of comparable properties to ensure property owners are paying their fair share of taxes.

The fair market value of all property is calculated by reviewing arm’s length sales between a willing seller and a willing buyer on the open market. Assessors consider information from many sources to determine your assessment.

Assessors will be reviewing market sales from January 1, 2020 through December 31, 2020. Sales after the new year will not be used to determine your new value. The property tax bill you receive in December of 2021 will be based on the new assessment value of your property.

Assessors don’t set tax rates. There are no additional taxes collected because the town is performing a revaluation. The revaluation does not change the amount of tax collected by the town, county, school district or technical college.

What is a Property Revaluation?

To read more about a Property Revaluation, CLICK ON THIS LINK.

Timeline of Revaluation:

January - February: Assessor reviews previous year’s sales and market data

January - March: Trespass letter will be sent to properties assessors need to visit

February - April: Permits and sales are verified

March - April: Comparable market data used to revalue all property

May: Notice of new value will be mailed to property owners


Click here for a PDF copy of the Frequently Asked Questions Below

What is a Revaluation?

A revaluation is where the assessor reviews all property within the town and modifies each to its current market value. A periodic revaluation ensures equity amongst all property types while bringing assessed property values in line with market rates as required by State law.

Why is a revaluation being conducted?

The revaluation is being conducted to bring all property types to current market rate and to comply with the valuation requirements of State law (sec 70.05(5)(b), Wis. Stats.)

Did Covid affect my value?

All market conditions, including Covid are taken into account when determining the value of your property.

When will this new assessment go into effect?

The property tax bill you receive in December 2021 will be based on the new assessment value of your property

Does the Town get more tax revenue from a revaluation?

No, there are no additional revenues collected when property is revalued. A revaluation ensures that all property owners pay their fair share of taxes and the municipality complies with state law. Your tax burden may increase or decrease depending on your property’s style, location, year built, etc.

How can my assessment change when I haven't made changes to my property?

Economic conditions such as recent home sales in your neighborhood, sales of reasonable comparable buildings, and market conditions will influence the value of your real estate.

Will the assessor visit my property?

Assessors will only need to visit properties with completed permits or sales that they need to review, etc. Not all property will be visited in this revaluation. The assessor will use market data available from recent sales and property data already on file to determine your new value.

A notice of new value was sent out on June 7, 2021.

There will be an Open Book period for property owners to review their new value with the assessor. You may contact the assessor anytime to review your value or ask questions.

For additional information, visit or if you have questions regarding the 2021 revaluation please email [email protected] or call 1-800-770-3927.