Construction Trade Research Area

(C-36) Plumbing

Apply for the License and Exam

Contractors State License Board
9821 Business Park Drive
P.O. Box 26000
Sacramento, CA  95826
Phone:  (800) 321-2752
CA State License Board

Exam Type


Exam Content

Subject Areas % of
Planning and Estimating 21
Rough-in and Top-out Plumbing Systems 27
Finish Plumbing Installations 14
Service, Repair, and Remodel Plumbing Systems 20
Worker and Job Site Safety 18

The California License Board does not publish the passing score. According to the Blueprint for Becoming a California Licensed Contractor, "You will be informed at the test site about the percentage of correct answers needed to pass each examination."
The qualifying individual for a contractor’s license is required to pass the written Law and Business and trade examinations unless he or she meets the requirements for a waiver.


Books NOT Allowed in the Exam

1. California Building Code, 2013, ICC. Buy from Publisher
2. California Mechanical Code, 2013, IAPMO. Buy from Publisher
3. California Plumbing Code, 2013, IAPMO. Buy from Publisher
4. NFPA 13D: Standard for the Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes, 2013, NFPA. NFPA Link
5. Cal/OSHA General Industry, Safety Orders with Selected Electrical Safety Orders, California Code of Regulations, Title 8, Division 1 - Industrial Relations, Chapter 4, Subchapter 7. Doc Link
6. Cal/OSHA Construction Safety Orders. California Code of Regulations, Title 8, Division 1 - Industrial Relations, Chapter 4, Subchapter 4. Doc Link
7. Underground Service Alert Guidelines, California Government Code 4216 and California Business and Professions Code 7110, Dig Alert. Doc Link

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California • (C-36) Plumbing
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