A. Except as otherwise provided in Section 17.08.125, there shall be a front yard of not less than fifteen feet in depth measured from the front lot line. If a garage or carport opening faces a public or private street, such garage or carport whether attached to or detached from the main building, shall be set back not less than twenty feet.
B. The front yard setback shall be determined by the intersection of the first or each successive story with a forty-five degree airspace diagonal as defined in Section 17.04.035. Roofs, parapets and appurtenances may not extend more than ten feet beyond the air space diagonal.