What We Do

The Island County Assessor's office is required to physically inspect, appraise and revalue all real property once every 6 years with an annual review and update based on sales analysis.

This appraisal cycle is established by the state constitution and state laws, enforced by the State Department of Revenue

In order to do our job we:

  • Maintain inventory, description, ownership, sales and mapping for all properties
  • Provide information, education and assistance
  • Provide public computer access to assessment data, also now available on the Internet through the Real Property Search.
  • Allocate value to taxing districts, calculate levy rates and certify tax roll to Treasurer
  • Administer and provide information for tax exemptions: Senior citizen and disabled persons exemption
  • Open space taxation, forest land exemption, farm and agricultural exemption
  • Historic properties exemption
  • Residential home improvement exemption
  • Prepare defense of valuations for appeal boards
  • Maintain business personal property listings and audits

What We Don't Do

We don't mail or collect your taxes. The County Treasurer does this. Call them at 360-679-7302

We don't take your appeal. The Board of Equalization does this. Call them at 360-679-7379

As your Assessor, one of our functions is to have this office be transparent and accessible to you. This web section will provide you with information and assistance on questions you may have regarding the Assessor's office. If you have any other questions or concerns that are not addressed here, please contact us.

It is our goal to appraise all property fairly and equitably, to maintain accurate and accessible property records, and give prompt and courteous customer service.

State law requires that the Assessor value property at 100% of true and fair market value. The market value is determined by the property owners who are buying and selling real estate in the marketplace. Finding the market value of your property means discovering the price most people would pay for your property.

Please feel free to contact us at any time. The Assessor's staff is always willing to answer your questions.

New Construction and Personal Property Assessment Notices have been mailed

September 22, 2023

The Assessor is required to appraise all properties at 100% of their true and fair market value, according to highest and best use of the property. Fair market value is the amount that a willing and unobligated buyer is willing to pay a willing and unobligated seller. The new value represents market value as of January 1 of this year based on market evidence from sales typically occurring last year. Market or sales comparison approach to value is determined, or estimated, based on multiple sales of similar properties. Most residential property is valued using this method.

The Island County Assessor encourages any taxpayers to call with any concerns or questions about their property values. Appraisers are happy to talk with you about how they established the market value of your property.  To reach the appraiser assigned to your area call 360-679-7303 Monday thru Friday from 8:00 am to 4:30 pm.

Taxpayers have 30 days from the date of mailing listed on the notice to appeal their property value with the local board of equalization.  Appeal information will be on the mailing notice and on the Island County website.

Kelly Mauck
Island County Assessor

Safety & Health Precautions in Effect

The Island County Assessor's Office is open to the public with safety and health precautions in effect. At the present time, masks are not required. We practice limited entry and 6-foot distancing for the safety of staff and customers. These practices are also observed at the Camano Administration Building.

We encourage you to complete as much of your business with us as possible via phone or email. If you are unable to complete your business with us by phone or email, you may call to set up an appointment prior to your visit by calling 360-679-7303, this will limit the amount of time you will be spending in the building and the Assessor's office.