Colusa County Zoning Code § 35.01 Continuation of existing

(a)

The lawful use of the land exiting at the time of the passage of this ordinance, although such use does not conform to the provisions hereof, may be continued, provided, however, that nonconforming commercial and industrial uses operated on open land not accessory to a permanent building on the site may be continued for a period not longer than five years after such uses become nonconforming.

(b)

In all "R" districts, every nonconforming building or structure which was designed, arranged or intended for a use permitted only in districts other than "R" districts shall be completely removed, or altered and converted to a conforming building, structure or use when such buildings or structures have reached or may hereafter reach, the ages hereinafter specified, computed from the date the building was erected. In the case of buildings defined in the Building Code effective in the city at the effective date of this ordinance: Class I and II, forty years; Class III and VI, thirty years; Class V, twenty years. Provided, however, that this regulation shall not become operative until twenty years from the effective date of this article.

(c)

If any nonconforming use is abandoned or discontinued for any reason, subsequent use of such land shall be in conformity with the provisions of this ordinance. The discontinuance of a nonconforming use for a period of six months or more is, in itself prima facie evidence of abandonment.