Rear Yard.
There shall be a rear yard for any accessory building of not less than (3) feet from the rear property lot line, alley line, or easement line, except that if no alley exists, the rear yard shall not be less than eight (8) feet as measured from the rear property line. In A, B, G and H Districts, the main dwelling and all accessory buildings shall not cover more than sixty (60) percent of that portion of the lot lying to the rear of a line erected joining the midpoint of one side lot line with the midpoint of the opposite side lot line. In C, D, E and F Districts, coverage for the main building and all accessory buildings is limited to not more than fifty (50) percent. Carports, garages or other detached accessory buildings located within the rear portion of the lot as heretofore described shall not be located closer than ten (10) feet to the main building, nor nearer than three (3) feet to any side lot line, except that a breezeway not exceeding fifteen (15) feet in height and six (6) feet in width, as measured to the outside face of support posts and exclusive of a maximum eighteen (18) inch roof overhang, shall be permitted connecting the dwelling structure to an accessory building, provided it is open on all sides from the eaves of the roof to the ground. Carports and garages which open directly to and are entered from an alley shall not be located nearer than ten (10) feet to the rear lot line. Maximum overhang for roofs of accessory buildings into the required rear yard is eighteen (18) inches.