Daylight Plane. A daylight plane for the main dwelling unit shall begin a minimum of five (5) feet from the side property line and extend directly upwards from the grade of the property for a distance of fifteen (15) feet, six (6) inches (vertical plane), and then slope inwards towards the interior of the lot at a forty-five (45) degree angle. The vertical plane may be extended to a maximum height of nineteen (19) feet, six (6) inches above grade subject to written approval of the owner(s) of contiguous property abutting the extended vertical plane or a use permit in accordance with Chapter
16.82. No portion of the structure shall intrude beyond the daylight plane except for dormers and gables as provided below and chimneys, vents, flues and eave overhangs. Solar collectors and antennas may intrude subject to written approval of the owner(s) of contiguous property abutting the intrusion or a use permit in accordance with Chapter
16.82;
Gables and dormers may intrude into the daylight plane. The permitted intrusion shall decrease on an even gradient from ten (10) feet in the case of a five (5) foot required above ground side yard to no permitted intrusion at an eight (8) foot required above-ground side yard. Calculation of the permitted intrusion shall include fractional computation when necessary to maintain the even gradient. The intrusion shall be measured along the uppermost horizontal roofline of the gable or dormer. The gable or dormer intrusion must not extend beyond a triangle in the plane of the building face described as follows:
(i) The base of the triangle is the line formed by the intersection of the building wall with the daylight plane;
(ii) The aggregate length of the bases of all triangles intruding into the daylight planes must not exceed thirty (30) feet, of which no more than twelve (12) feet may occur at an interior side yard;
(iii) The triangle is limited to a maximum peak height of twenty-four (24) feet above grade;