No building or structure shall be constructed, extended, repaired or altered in violation of the provisions of this Chapter, except for ordinary repairs as defined in § 66104(f) and except further that the raising or lowering or moving of a building or structure as a unit necessitated by a change in legal grade or widening of a street shall be permitted; provided, that the building or structure is not otherwise altered or its use or occupancy changed. SOURCE: GC § 31004. 2016 NOTE: Pursuant to the authority granted by 1 GCA § 1606, the reference to section 31003(f) of the Government Code was altered to reflect its codification in the GCA.