Grouping and spacing of buildings and dwellings in residential areas shall provide for a restful and uncrowded environment. Landscaped areas shall be encouraged as the dominant features of the development. Areas not covered by buildings or by off-street parking space or driveways shall generally be planted into natural vegetation, lawn, trees and shrubs, and otherwise landscaped and maintained in accordance with good landscape practice as approved on the final plan. Permanent sprinkler systems shall be installed when required by the Planning Commission to provide for irrigation of planted areas. (Ord. 111 §1, amended, 1985; Prior code §12-107-3(J))