California Code of Regulations
Title 25 - Housing and Community Development
Division 1 - Housing and Community Development
Chapter 3 - Factory-Built Housing, Mobilehomes, and Manufactured Homes
Subchapter 1 - Factory-Built Housing
Article 3 - Administration and Enforcement
Section 3032 - Required Inspections

(a) For at least the first ten units of each model, produced at each manufacturing location, all systems including structural, electrical, mechanical and plumbing shall be inspected.

(b) Following inspection and approval of the first ten units, each system shall be inspected in at least 25 percent of all units produced thereafter, except the inspection level may be reduced to 10 percent for building components or building systems. The manufacturer shall request written approval from the department before reducing the level of inspection from the initial 100 percent inspection.

(c) The manufacturer may request written approval from the department to further reduce the frequency of inspection for building components, when it can be shown that the nature of the product, its end use, or the manufacturing process warrants a lesser inspection frequency.