means a residential building, dwelling unit, or an individual dwelling room or combination of rooms, or building component, assembly, or system manufactured in such a manner that all concealed parts or processes of manufacture cannot be inspected before installation at the building site without disassembly, damage, or destruction of the part, including units designed for use as part of an institution for resident or patient care, which is either wholly manufactured or is in substantial part manufactured at an off-site location to be wholly or partially assembled on site in accordance with the California Building Code and other regulations adopted by the State Building Standards Commission pursuant to California Health and Safety Code Section
19990. Factory-built housing does not include a mobile home, as defined in California Health and Safety Code Section
18211, mobile accessory building or structure, as defined in Section 18213, a recreational vehicle, as defined in Section 18215.5, or a commercial coach, as defined in Section 18218.