In any R-57 or R-100 district, a lot, as defined in Section 18.08.280, with an area or width less than that required for a permissible residential use, existing prior to June 20, 1969, may be used as the site for one one-family detached dwelling; provided, that all other regulations for the district, as prescribed in this title, shall be satisfied.

(Ord. 698 (part), 1979).

(a)

In R-57 and R-100 districts where more than fifty percent of the normal or average-size lots in a block fronting on one side of the street are developed with existing buildings, other than accessory buildings, with front yard setbacks less than that required for the district, a new single family or duplex dwelling shall adopt a minimum front yard setback dimension which is the average of the setbacks of the existing buildings on the block, but in no case shall this dimension be less than fifteen feet nor need it exceed twenty-five feet.

(b)

In the R-57 and R-100 districts on any corner lot where there is provided a side yard along the interior side lot line at least equal in width to the minimum depth of the rear yard required for the district, the main building may encroach upon the required rear yard up to a line where the remaining rear yard is no less in depth than the minimum width of the side yard required for the district. No accessory building may be located in the side yard, except a patio shelter enclosed on no more than two sides by walls or other enclosures, and in conformity with the other provisions of this title

(Ord. 698(part), 1979).