Lot area. After adoption of this chapter, no lot area shall be so reduced that the dimensions and yard requirements imposed herein cannot be met. However, where existing lots do not satisfy such requirements, they shall be governed by § 365-28; however, the zoning classification requirements of this chapter shall be met.

Accessory buildings. Accessory buildings shall not occupy more than 30% of the required area for the rear yard. Any accessory buildings projected forward of the rear building line of the principal building shall satisfy the same side yard requirements as the principal building.

Area obstructions. Every part of the required area of a yard shall be open to the sky unobstructed, except for accessory buildings and the ordinary projection of sills, cornices, and ornamental features which shall not exceed 12 inches into the setback, except that in commercial areas, a permanent awning, plus its accessory columns or struts, may project not more than five feet into a required front or side yard.

Vision clearance triangle. In each quadrant of every street intersection there shall be designed a vision clearance triangle, bounded by the inner face of curblines and a line connecting them 35 feet from their theoretical intersection. Within this triangle, no object, including trees, shrubs and bushes shall be allowed above a height of 2 1/2 feet above the top of curb, or edge of pavement if no curb is present, if it obstructs the view across the triangle. This subsection shall not apply to posts, wire fences, or the C1 District.

Cul-de-sac. In the use of a cul-de-sac, a lot width shall be constructed as that distance from side boundaries to side boundaries at the front setback line.

Number of buildings per lot. In the R2, R3, R5, R6, R7, C1, C2, and C3 Districts, only one principal building shall be permitted on any one lot. In the R4, I1, I2, PUD and BPD Districts, more than one principal building may be permitted on any one lot upon the granting of a conditional use permit, provided that area and setback requirements of the applicable district are satisfied.