The alternative building regulations adopted pursuant to this section shall be applicable in those geographic areas specifically designated for such occupancy, or as expressly permitted by a redevelopment plan with respect to a redevelopment project area. The alternative building regulations need not impose the same requirements as regulations adopted pursuant to Section 17922, except as otherwise provided in this section, but in permitting repairs, alterations, and additions necessary to accommodate joint living and work quarters, the alternative building regulations shall impose such requirements as will, in the determination of the local governing body, protect the public health, safety, and welfare.
It is the intent of the Legislature that local governments have discretion to define geographic areas which may be utilized for joint living and work quarters and to establish standards for such occupancy, consistent with the needs and conditions peculiar to the local environment. The Legislature recognizes that building code regulations applicable to residential housing may have to be relaxed to provide joint living and work quarters in buildings previously used for commercial or industrial purposes.
Ca. Health and Saf. Code § 17958.11