Except as setbacks along major streets required in Chapter 17.86, there shall be established and maintained:
(B) Front yard requirements are as follows. Lots shall have a front yard of not less than 30 feet;
(C) Side yard requirements are as follows:
(1) Lots with buildings 15 feet in height or less shall have side yards with widths of not less than five feet;
(2) Lots with buildings over 15 feet in height shall have side yards with widths of not less than ten feet;
(3) Corner lots shall have a side yard of not less than 15 feet in width along the side adjacent to the street;
(4) Reversed corner lots shall have a side yard on the street side of a width not less than the required front yard on the key lot to its rear;
(D) Rear yard requirements are as follows: each lot shall have a rear yard of not less than ten feet.
(`78 Code, § 17.28.100.)