Washington Property Tax Assessors

Benton County, Washington Tax Assessors' Office

Benton County Assessors Phone Number
Benton County Assessor
620 Market Street
Prosser, Washington 99350

Where is the Benton County Tax Assessor's Office?

The Benton County Tax Assessor Office is located at 620 Market Street, at the building in Prosser, Washington.

What can the Benton County Assessor's Office do for me?

The Benton County Tax Assessor's Office oversees the appraisal and assessment of properties as well as the billing and collection of property taxes for all taxable real estate located in Benton County.

Contact the assessor's office if you need help with paying your property taxes, applying for a homestead exemption or other tax exemption, reporting upgrades to your home, appealing your property tax assessment, or verifying your property records.

Submitting a Benton County property tax appeal

If you believe that your house has been unfairly overappraised (i.e. appraised at a value higher than the true market value of the property), you can attempt to get your home re-appraised at a lower value by contacting the Assessor's Office to submit a property tax appeal.

You will have to submit a form describing your property and sufficient proof that it is overassessed, including valuations of similar homes nearby as evidence. If your appeal is accepted, your home assessment (and property taxes) will be lowered as a result.

If you would like to appeal your property, call the Benton County Assessor's Office at (509) 786 2046 and ask for a property tax appeal form. Keep in mind that property tax appeals are generally only accepted in a 1-3 month window each year.

For more information and example appeals, see how to appeal your property taxes.

Useful Benton County Facts:

The median home value in Benton County is between $167,565.00 and $171,435.00. Property tax rates are based on property values.

How can I contact Benton County?

You can try contacting the Benton County local government directly with any issues the Assessor's Office can't solve. In many counties, certain property records such as deeds are kept in the county courthouse or county archives instead of at the tax assessors' office.

The county seat for Benton County is located in the in Prosser, which is where the Benton County Assessors' Office is also located. You can direct your general inquiries to Benton County with the contact info listed below.

Benton County Phone Number


Benton County Fax Number


Benton County Address

620 Market Street
Prosser, WA 99350