Which CSLB License Should I Get?
California has three license classes: A (engineering), B (general building), and C (specialty). Most residential and light-commercial contractors choose between B and a C.
General B — when you want flexibility
Pick B if you:
- Build or remodel structures involving two or more unrelated trades
- Want to act as the prime contractor and sub out trades
- Plan to build custom homes, ADUs, or do full remodels
Limitation: you can't take a project that's only one trade (e.g., pure electrical work) unless you also hold that C license.
C-10 Electrical — high-margin specialty
Electrical-only contractors. Strong demand, especially with EV charging and solar.
C-36 Plumbing — steady, recession-resistant
Plumbing repairs and installations. Steady residential service demand.
C-20 HVAC — fastest-growing
HVAC + heat-pump retrofits are booming under California energy code.
C-27 Landscaping — easiest entry
Lowest experience verification friction; broad scope including hardscape and irrigation.
Decision framework
- What work do you do today? Match the license to your verifiable experience.
- Who pays you? GC subbing work → specialty C. Homeowners hiring you for whole projects → B.
- Future plans? You can add classifications later by passing additional trade exams.