A "nonconforming use" is a use of a structure or land that was lawfully established and maintained prior to the adoption of the Firebaugh Zoning Ordinance but which does not conform with the use regulations for the district in which it is located.

A "nonconforming structure" is a structure that was lawfully erected prior to the adoption of the Firebaugh Zoning Ordinance but which does not conform with the standards of coverage, setbacks, height, or distance between structures prescribed in the regulations for the district in which the structure is located.