Aerial photo of the county - Serving Franklin County since 1883


Assessor's Office Phone Number: (509) 545-3506
Assessor Email:
Personal Property Email:
Mapping and platting:

This site has been prepared to help you better understand the functions of the Assessor's office. The information contained herein will assist you, as a property owner and taxpayer, in understanding assessment procedures, tax collection and distribution of the tax dollar.

The Assessor does not establish the dollar amount of taxes required nor does the Assessor bill or collect taxes. The taxpayers, state limitations and assessed value determines the tax rate for each district. The County Treasurer bills and collects the required tax.

It is my responsibility as your Assessor, together with my staff, to ensure that all property owners are treated fairly and impartially in accordance with our state laws. It is our sincere desire to serve and support you in an effective, responsible and courteous manner.

The County Assessor's office welcomes your inquiries and concerns on how your property is assessed. As your Assessor, I am committed to serve and assist you personally in any matters dealing with this office. Also, I will be available to speak to and/or answer questions for interested groups. Please contact the Assessor's office for more information.

Peter McEnderfer
Franklin County Assessor


Diagram: Market Sales used in Mass Appraisal Process determine Appraised Value as of January 1, 2020, Used to calculate Taxes Payable in 2021

The Franklin County Assessor's Office is mailing Real Property Change of Value Notices on August 14, 2020.

During this challenging time, there may be questions regarding how the COVID event may impact the assessed value of your property . RCW 84.40.020 requires property to be valued as of January 1st for taxes payable the following year. The notice being mailed is for the property value as of January 1, 2020 and is based upon 2019 market data, which is prior to COVID. The value notice you receive next year, in the summer of 2021, will be based upon the 2020 market data which may or may not indicate an impact from the 2020 economic conditions. If you want more information, please visit the Assessor's website at or contact the Franklin County Assessor's Office at 509-545-3506 or by email at