A total of three signs are allowed to advertise your garage sale. One on your property and two may be placed off the sale property, as... More… A total of three signs are allowed to advertise your garage sale. One on your property and two may be placed off the sale property, as long as they are not in the public right-of-way and that permission is obtained from the property owner where the signs are placed. All signs may be erected the night before the sale.Less…