Any building used or to be used as a residence which is not legally occupied or at which substantially all lawful construction operations or residential occupancy has ceased for a period of at least three months, and any commercial property that has not been legally occupied or at which substantially all lawful construction operations have ceased for a period of at least three months, and which exhibits evidence of vacancy such that a reasonable person would believe that the property is vacant. Any property that contains all building systems in working order, is being maintained on a regular basis, has not been cited by the Town for any violation of municipal ordinance within such time and is being actively marketed by its owner for sale or rental shall not be deemed vacant.