Pennsylvania has allowed lost value for decades, so a diminished value claim in Pennsylvania against the other driver has a long history behind it. The weak spots are a tiny coverage minimum and a short deadline.
The Holt Rule Still Sets the Measure
The rule comes from Holt v. Pariser, a 1947 Superior Court case. An owner gets the reasonable cost of repair, with due allowance for any gap between the original value and the value after repairs. That allowance is the lost value. The case is summed up in the Matthiesen, Wickert & Lehrer survey.
Put simply, the at-fault driver owes for the repair and for the value the car still lost. Proof matters most. Ask a qualified appraiser for a written diminished value report before you make a demand.
A $5,000 Minimum Can Run Out Fast
Pennsylvania sets the property damage minimum at just $5,000, according to the Pennsylvania Insurance Department. A body shop bill on a late model car can pass that alone. If the other driver carries only the minimum, the lost value may have to come from the driver, not the policy.
Munoz and Your Own Insurer
Claims under your own policy have a poor record. In Munoz v. Allstate, from 1999, a Philadelphia trial court held that paying lost value would not be the norm. People who buy a policy could not count on it. If someone else caused the wreck, send the claim to that driver's company. For one insurer's stance, see whether Allstate pays lost value.
Deadline, Fault and Court Limits
You must sue within two years under 42 Pa. Cons. Stat. § 5524, which covers actions for injuring personal property.
Your own fault counts against you only up to a point. Section 7102 allows recovery as long as your negligence does not exceed the defendant's. Your share then comes off the award.
A magisterial district judge can hear a civil case where the sum demanded does not exceed $12,000, under § 1515. If an insurer stalls, use the Pennsylvania Insurance Department complaint page.