NewsCopter 7 was over the scene along Route 46 around 6:30 a.m.
The road was closed in both directions while firefighters worked to put out the flames at the Victoria Dealership.
The fire appeared to be confined to a building on the property, and did not involve any vehicles on the lot.
Firefighters brought the situation under control in about a half-hour.
There were no reports of any injuries.