Tax relief and valuation review
A homestead exemption, senior-relief program, or valuation protest can change the amount a homeowner owes—but only if the filing reaches the right local office in the correct window. Use the verified county guidance below as your working checklist, then confirm the current form and deadline with Thurston County Assessor; Thurston County Treasurer collects property taxes.
Relief programs
The filing guidance for this county is: December 31, 2025 for a 2026 assessment-year Senior/Disabled exemption under the Washington application schedule; applications are administered by the Thurston County Assessor. Use the official form or application channel, provide the residence and ownership documentation requested, and keep a copy of the submission.
Review county contact informationFor 2026, Thurston County's FAQ describes the Senior/Disabled exemption for age 61+ or disability, owner-occupants, with annual household income not exceeding $59,000. The program reduces voted and regular levies based on income; Senate Bill 6162 expands thresholds beginning January 1, 2027. Contact 360-867-2200: https://www.thurstoncountywa.gov/departments/assessor/property-tax-relief-programs
Washington has no individual parcel assessed-value cap. County assessors value property at 100% of true and fair market value; regular taxing-district levy revenue is generally limited to a 1% annual increase plus new construction under RCW 84.55, subject to voter-approved lid lifts and other statutory rules. The 1% constitutional levy limit constrains aggregate regular levies, not an individual parcel's value.
Appealing an assessment
Use the valuation notice and the county’s published protest guidance to determine the last day to file. Do not assume the payment deadline controls the appeal.
Gather comparable sales, photographs, repair records, appraisal evidence, property characteristics, and any documentation that explains why the assessed value is incorrect.
Submit through the official channel, save the confirmation, and attend the board or review hearing if one is scheduled. An appraiser or attorney can help evaluate evidence when the value or stakes are substantial.
The verified protest guidance for this county is: for a 2026 assessment-year valuation, Thurston County's official appeal rule is the latter of July 1, 2026 or 60 days after the Assessor mailed the Valuation Notice; the local notice controls the exact date. If the language is not a specific calendar date, contact the office promptly for the current notice and board-review schedule.