In most states if you have a car it must be insured. If it sits on your own property on blocks, then that might be an exception where your property insurance would kick in. In a public garage is a different story. If it was in a storage locker, that might be better than a garage. If the state requires insurance to register it. Get insurance and register it and then cancel the insurance. That is best I can suggest. However, if you are paying on a loan the crediter can demand that the vehicle have some kind of insurance.
Ask your home owner insurance agent about this.