“Residential multiple-unit” means a residential building designed for two or more families, or for more than five unrelated persons, including, but not limited to, duplexes, triplexes, fourplexes, apartment buildings, dormitories, boarding houses and rooming houses, mobile homes in a mobile home park, and zero lot line buildings wherein the city permitted multiple units within a building to be served by a common water meter. (Ord. 3024 § 2, 2013; Ord. 2658 § 2, 2006; Ord. 2609 § 1, 2006; Ord. 2572 § 2, 2005; Ord. 2529 § 2, 2004; Ord. 2069 § 3, 1996)