Adjacent to Public Street. All buildings shall be set back at least 30 feet from the back of curb. Buildings over two stories and/or 35 feet in height, and/or greater than 30,000 square feet in area, shall be set back a minimum of 40 feet from the property line. On "irregular lots," defined as a lot of such a shape or configuration that technically meets the area, frontage, and width/depth requirements of this title but is unusual in elongations, angles, curvilinear lines unrelated to topography or other natural features, including triangle, gore, or pie-shaped lots, where determined by the city that alternative building orientations are not feasible and/or desirable to the city, the city council may approve adjusted building setbacks below the minimums listed in this subsection provided the average setback remains at or greater than the required setback; provided, however, that no portion of a building shall feature less than a 10-foot setback in relation to any property line.