What you'll learn
Lesson 1 — What DV is
Inherent versus repair-related diminished value, and why a repaired vehicle can sell for less.
Lesson 2 — Building the report
Pre-loss value, repair severity, market evidence, and documenting a reproducible conclusion.
Lesson 3 — Running the assignment
Intake, scope, engagement terms, delivery, and responding to carrier rebuttals.
Lesson 1 — What diminished value is
Diminished value is the loss in a vehicle's market value after it has been damaged and repaired. Two vehicles that look identical — one with an accident history and one without — rarely sell for the same price, because buyers and dealers discount vehicles with a reported accident, structural repairs, or airbag deployment.
Inherent diminished value is the loss that remains even when repairs are performed properly. Repair-related diminished value is additional loss caused by poor or incomplete repairs. Most claims against an at-fault driver's carrier focus on inherent diminished value, which is recoverable in most states as part of third-party property damage.
Lesson 2 — How a credible report is built
- Identify the vehicle exactly — VIN-decoded year, make, model, trim, options, and mileage.
- Establish pre-loss value — from recognized valuation guides and current comparable listings.
- Classify repair severity — the estimate, parts replaced, structural versus cosmetic, frame or unibody work, airbag deployment.
- Gather market evidence — regional dealer input on how the accident history affects what they would pay.
- Reconcile and document — show the method, the sources, and the math so another appraiser could reproduce the conclusion.
Carriers commonly rebut DV with formula shortcuts that cap the loss at a small percentage of value. A report that documents market evidence is much harder to dismiss.
Lesson 3 — Running the assignment
- Intake: vehicle details, repair estimate, photos, claim number, and whether the claim is against the owner's carrier or the at-fault driver's carrier.
- Scope and engagement: a written fee and scope before work begins.
- Delivery: a signed, certified report with exhibits, and a retained workfile.
- After delivery: many appraisers support the owner with written responses to carrier rebuttals. Appraisers are not attorneys and do not give legal advice.