General Building (B) Contractor License Guide
The General Building (B) license is one of the most common classifications. Here is what it authorizes and how to qualify.
Last reviewed July 22, 2026
What the B license covers
General building contractors typically work on structures requiring at least two unrelated trades, or contract for framing/carpentry under specific rules. Verify the current scope with CSLB.
Qualifying and testing
Document related journey-level experience, then pass the trade exam and the Law & Business exam.
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When do I need a B license?
Generally when a project involves two or more unrelated trades. Confirm the current definition with CSLB.