California Code, Health and Safety Code - HSC § 9550

It is unlawful for any person to construct, or cause or permit to be constructed upon any property belonging to or controlled by him, any mausoleum or columbarium, or to make any alterations or changes or do any reconstruction work upon, in or to any building or structure for use as a mausoleum or columbarium without first having applied for and procured a separate building permit for each such mausoleum, columbarium, building or structure, or alteration, from the department or official charged with the enforcement of this part.