Appraisal evidence for a Seattle property assessment appeal

If you disagree with the assessed value of a Seattle home, a residential appraisal may help document a supported opinion of value for the relevant date. It does not guarantee a lower assessment or a lower tax bill. Before ordering, check the King County appeal instructions and confirm that the scope and effective date fit your purpose.

Start with the notice and appeal instructions

Review the assessed-value notice, property description and the date being valued. King County’s Board of Appeals and Equalization handles assessment appeals. The county’s current instructions explain filing and evidence requirements. An informal discussion with the assessor does not replace checking the formal appeal deadline.

What can an appraisal contribute?

An appraisal explains the property, relevant market evidence, analysis and value conclusion for a defined assignment. The evidence must address the valuation question at issue. A current sale-price opinion should not automatically be substituted for value as of the assessment date. Learn how retrospective home appraisals address a specified past date.

What information helps?

Provide the notice, parcel number, property address, relevant date and deadline. Identify errors you believe appear in the property record and supply supporting photographs, records or other evidence. Explain ADUs, acreage, condition issues, unusual features and any changes after the relevant date.

What does it not decide?

The appeal body decides the assessment appeal. The appraisal provides valuation evidence; it does not set tax rates, award exemptions, establish legal rights or promise savings. Ask the county about filing requirements and a qualified adviser about legal or tax questions.

Official appeal resources

Use the King County assessment appeal instructions and Washington Department of Revenue property assessment information to check the requirements that apply to your notice.

Request an appraisal quote, specifying that the intended use is an assessment appeal. Fees start at $695 and vary by scope and property complexity. Confirm availability before relying on a report deadline.