A structure that was legally established but no longer conforms to all development standards of this land use code (such as height or setbacks) is considered a legal nonconforming structure. Notwithstanding development standard requirements in this code, minor repairs and routine maintenance of a legal nonconforming structure are permitted. The continuation of a legal nonconforming structure is subject to the following:
(1) A legal nonconforming structure that is damaged to an extent of 50% or more of its replacement cost may be restored only if the damage was not intentionally caused by the property owner and the nonconformity is not increased. Any residential structure(s), including multiple-family, in a residential zone damaged beyond 50% of its replacement cost by a catastrophe, such as fire that is not intentionally caused by the owner, may be reconstructed at the original density provided the reconstruction is commenced within 2 years after the catastrophe.
(2) A legal nonconforming structure may be altered to bring the structure closer to compliance with existing regulations, but shall not be altered in a manner that increases its nonconformity.
(3) A legal nonconforming structure that is moved loses its nonconforming status and must then conform to all requirements of this land use code.