The R-2 Low Density Multiple-Family Residential Zone is intended as a residential district of single or low-density multiple-family dwellings with either one or more dwellings on the same lot. Except as specifically provided elsewhere in this title, any and every building and premises or land in the R-2 zone shall be used for or occupied, and every building shall be erected, constructed, established, altered, enlarged, maintained, moved into and within the R-2 zone exclusively and only in accordance with the regulations set forth in this chapter.
(`78 Code, § 17.22.010.)