Washington Appraisal Clause and Diminished Value: What Actually Applies?
An appraisal clause is a contractual process for certain disagreements about the amount of loss. It is not a blanket right to demand appraisal from the at-fault driver’s insurer.
First identify which claim you have
First-party means your own insurance contract. Third-party means a liability claim against another driver or their insurer. These are not interchangeable. Before invoking an appraisal clause, read the policy’s physical-damage coverage and appraisal wording and identify the amount-of-loss issue you want decided.
Washington’s 2026 automobile appraisal statute
RCW 48.18.620 requires an appraisal provision in qualifying first-party automobile physical-damage policies issued or renewed effective January 1, 2026 or later. The statute describes written demand, competent disinterested appraisers, timelines and valuation of actual cash value and amount of loss. It does not by itself establish a universal third-party post-repair diminished-value appraisal right.
Does it apply to repaired-vehicle diminished value?
The answer cannot be decided from the word “appraisal” alone. Examine policy coverage, the particular loss element, the policy effective date and any controlling interpretation. A disagreement about a total-loss ACV offer is different from a dispute about post-repair market stigma. Seek qualified legal advice for a disputed interpretation.
What to request from the insurer
- Exact policy form and endorsements in effect on the loss date.
- Written explanation of whether the carrier disputes coverage, the amount of loss or the availability of appraisal.
- The insurer’s valuation basis and any applicable policy exclusions.
- A clear record of the demand, response and deadlines if appraisal is applicable.
Frequently asked questions
Can I demand appraisal from the other driver’s insurer?
Not simply because RCW 48.18.620 exists. It addresses qualifying first-party policies. Third-party liability claims follow a different legal route.
Does the statute apply to every older policy?
It specifies policies issued or renewed effective January 1, 2026 or later; check the applicable policy and date.
Will an appraiser decide coverage?
Appraisal generally addresses valuation issues within its scope; coverage and legal interpretation may require a different process.
Washington primary sources and important limits
Washington’s insurance commissioner explains that diminished value generally concerns the market-value difference remaining after repair and that it is usually pursued against the at-fault driver’s insurer. It is not paid automatically: the loss must be supported by evidence. Read the OIC’s auto-claim guidance.
WAC 284-30-330 addresses unfair claim settlement practices; WAC 284-30-370 addresses investigations; WAC 284-30-380 addresses settlement standards. These rules do not supply a universal diminished-value formula or guarantee payment. The OIC adopted revisions effective October 18, 2026; read the version effective for your claim.
RCW 48.18.620 governs appraisal provisions in qualifying first-party automobile physical-damage policies issued or renewed effective January 1, 2026 or later. Whether a specific post-repair diminished-value dispute is within a policy’s appraisal scope requires policy and claim analysis. Do not assume this statute gives every third-party diminished-value claimant an appraisal right. WAC 284-30-391 addresses total-loss settlement methodology, not a post-repair diminished-value formula.