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 King County Department of Assessments; King County Treasury collects property taxes.
Relief programs
The filing guidance for this county is: September 1, 2026 for limited-income deferral applications; no separate 2026 senior-exemption deadline was published on the official pages reviewed. Use the official form or application channel, provide the residence and ownership documentation requested, and keep a copy of the submission.
Review county contact informationKing County administers Washington senior/disabled and disabled-veteran exemption and deferral programs for qualifying primary-residence owners. The official page lists a 2025 household-income limit of $88,998 for the deferral program and directs applicants to the county tax-relief portal; exemption income limits vary by program.
Washington's constitutional 1% property-tax limit and the statutory 1% levy limit constrain taxing-district revenue, not an individual parcel's assessed value. County assessors value property at 100% of true and fair market value, so an individual assessed value can rise or fall by more or less than 1%; voter-approved excess levies, new construction, and senior/disabled relief are separate rules.
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: July 1, 2026 or within 60 calendar days after the mailing of the valuation notice, as applicable; petition to the King County Board of Equalization. If the language is not a specific calendar date, contact the office promptly for the current notice and board-review schedule.