Normal repairs and alterations may be made to a lawful nonconforming building; provided, that no structural alterations shall be made, except those required by law or ordinance. No existing nonconforming structure designed, arranged, intended for, or devoted to, a use not permitted under this title for the district in which such structure is located shall be enlarged, extended, reconstructed, structurally altered, or moved unless such use is changed to a use permitted under the regulations specified by this title for the district in which said building is located; provided, that work may be done in any period of twelve months on ordinary repairs or on repairs or replacements of nonbearing walls, fixtures, wiring, or plumbing to an extent not exceeding fifteen percent of the full value of the structure as determined from the assessed value thereof (according to the assessment thereof by the county assessor for the year in which such work is done); provided, that the cubical content of the building as it existed at the time of passage of the ordinance codified in this chapter not be increased; and provided further, that nothing in this title shall be deemed to prevent the strengthening or restoring to a safe condition of any building or part thereof declared to be unsafe by the city and ordered to be strengthened or restored to a safe condition, unless such building has been destroyed by an extent exceeding fifty percent of full value, as determined by consideration of the assessed value referred to above.
(Ord. 987 § 15.10, 1979; amended during 9/1992 supplement)