Construction of dwellings or any remodeling or additions to existing dwellings shall have a floor area ratio (FAR) which limits the maximum building area to 45 percent of the lot area for single-family dwellings on lots of 7,000 square feet or greater and 50 percent of the lot area or 3,150 square feet, whichever is less, for single-family dwellings on lots of less than 7,000 square feet. The floor area ratio calculation shall also include the square footage of patios, garages and other accessory structures present on the lot, but excluding covered patios open on at least two sides and covered porches open on at least one side with a total combined area of 300 square feet or less. For these purposes, an “accessory structure” is defined as any structure which rises four or more feet above finished grade. (Ord. 3153 § 2 (Exh. A), 2010; Ord. 2559 § 4, 1993; Ord. 2144 § 3, 1986).