A nonconforming building or structure existing at the time of adoption of [the ordinance from which this chapter is derived] may be continued and maintained except as otherwise provided in this section.

(1)

Alteration or enlargement of buildings and structures. A nonconforming building or structure shall not be added to or enlarged in any manner unless said building or structure, including additions and enlargements, is made to conform to all of the regulations of the district in which it is located.

(2)

Outdoor advertising signs and structures. Any advertising sign, billboard, commercial advertising structure, or statuary, which is lawfully existing and maintained at the time the ordinance from which this chapter is derived became effective, which does not conform with the provisions hereof shall not be structurally altered and shall be completely removed from the premises not later than three years from the effective date of the ordinance from which this chapter is derived.

(3)

Building vacancy. A nonconforming building, structure or portion thereof, which is or hereafter becomes vacant and remains unoccupied for a continuous period of one year shall not thereafter be occupied except by a use which conforms to the use regulations of the district in which it is located.

(4)

Change in use. A nonconforming use of a conforming building or structure (i.e., commercial use in a dwelling, etc.) shall not be expanded or extended into any other portion of such conforming building or structure nor changed except to a conforming use.

(Ord. of 2-21-1995, art. VII, § 1)

A nonconforming use of land, existing at the time of adoption of [the ordinance from which this chapter is derived], which has been discontinued for a period of three months may not be extended or renewed.

(Ord. of 2-21-1995, art. VII, § 2)