In all residential zones minimum densities are required. This requirement takes effect when property is divided or developed with multifamily units and requires that plats, short plats, and multifamily units have a density within the range specified in the zone. However, this minimum density provision is not intended to prohibit the construction of a single-family structure on an existing vacant lot. If a lot legally exists, a single-family unit can be built on it whether or not the lot will conform to density requirements; provided, that the unit is located such that it does not preclude future development at the prescribed density. (Ord. 1539 §29, 2019; Ord. 1024 §15, 1995).