Cal. Civ. Code § 17970.3

(a) This section shall only apply to both of the following:
(1) A new residential construction of a building that contains at least 1 unit, but no more than 10 units, contains only residential units, and has no floors used for human occupancy located more than 40 feet above ground level.
(2) A residential addition to an existing building that contains one to nine dwelling units, inclusive, contains only residential units, and has no floors used for human occupancy located more than 40 feet above ground level, for the purpose of adding new residential units to the existing building, not to exceed
10 total units in the building as proposed to be constructed.
(b) Within 10 business days of receiving a notice of the completion of the permitted work authorized by a building permit issued for a project subject to this section, the building department of every city or county shall conduct an inspection of the permitted work.
(c) If a building department of a city or county fails to meet the time limit in this section, it shall be in violation of Section 65589.5 of the Government Code.