The bodywork of the cars was scratched or keyed, and tyres on some of the cars were slashed.
Police say that the damage was done sometime between 6 pm on Friday evening and 6.30 am on Saturday morning.
Freelance hold the dealerships for Toyota, Lexus, Vauxhall, Nissan and Chevrolet cars in Jersey, as well as dealing in used cars.
Anyone with any information should contact the police on 612612.
