Cal. Gov. Code § 821.4

A public employee is not liable for injury caused by his failure to make an inspection, or by reason of making an inadequate or negligent inspection, of any property, other than the property (as defined in subdivision (c) of Section 830) of the public entity employing the public employee, for the purpose of determining whether the property complies with or violates any enactment or contains or constitutes a hazard to health or safety.