A diminished value claim in New York works best for a car that was new, rare or gaining value when it was hit. For an ordinary used car, the courts mostly stop at the repair bill.
Franklin Corp. and Cars That Gain Value
In Franklin Corp. v. Prahler, from 2011, a New York appeals court took up a narrow point. The owner's property had gone up in value since it was bought. The trial court had kept out proof of lost value and limited the owner to repair costs. The appeals court called that error and reversed.
The Matthiesen, Wickert & Lehrer survey sums up the rule. Lost value on top of repairs is open when the car tends to rise in value, is rare or unique, or is brand new. A plain commuter car with a dented door is a harder case. If your car fits one of those groups, a written appraisal gives the adjuster a figure to test.
Your Own Policy and the Edwards Case
A claim on your own coverage turns on the words of the contract. Back in 1922, in Edwards v. Maryland Motor Car Insurance Co., a court read a theft clause to cover lost value. That was one policy and one kind of loss. Read your own collision terms before you count on the same result.
Three Years Under CPLR 214
New York's CPLR 214 lists the suits that must be started within three years. Item 4 is an action to recover damages for an injury to property, and a car counts. The clock does not stop while you trade emails with an adjuster.
Shared blame does not end the case. Under CPLR 1411, your own carelessness is no bar to recovery. Instead, the award shrinks in proportion to your fault. So a driver who was mostly to blame still keeps a smaller claim.
A $10,000 Floor and Three Small Claims Courts
The state asks drivers to carry only $10,000 for property damage in a single crash. When the other driver has just that minimum, repairs and lost value both come out of the same pot. A bigger loss means going after the driver personally.
Where you sue on your own depends on where you live. The New York City Small Claims Court hears cases up to $10,000. The state small claims handbook lists $5,000 in City Courts and $3,000 in Town and Village Courts.
Before you file, send a clear demand letter with your proof. If the insurer stalls, use the Department of Financial Services complaint form. If the crash happened across the state line, the New Jersey rules may apply instead.