The CSLB issues licenses to contract in particular trades or fields of the construction profession. Each separate trade is recognized as a “classification.” You may add as many classifications to your license as you can qualify for.
The CSLB issues licenses for the following classifications:

• Class “A”—General Engineering Contractor. The principal business is in connection with fixed works requiring specialized engineering knowledge and skill.

• Class “B”—General Building Contractor. The principal business is in connection with any structure built, being built, or to be built, requiring in its construction the use of at least two unrelated building trades or crafts; however, framing or carpentry projects may be performed without limitation. In some instances, a general building contractor may take a contract for projects involving one trade only if the general contractor holds the appropriate specialty license or subcontracts with an appropriately licensed specialty contractor to perform the work.

• Class “C”—Specialty Contractor. There are 41 separate “C” license classifications for contractors whose construction work requires special skill and whose principal contracting business involves the use of specialized building trades or crafts. Manufacturers are considered to be contractors if engaged in on-site construction, alteration, or repair.

You may obtain a license in any of the classifications listed below. In addition there are “sub-classifications” listed under the C-61 limited specialty classifications. These are classifications that allow a contractor to perform very specific work with in a specified trade. For more information on these classifications click here. (LINK TO EMAIL)
Boiler, Hot Water Heating
and Steam Fitting Classification
 C-4
Building Moving and Demolition Classification C-21
Cabinet, Millwork and Finish Carpentry Classification C-6
Concrete Classification C-8
Construction Zone Traffic Control Classification C-31
Drywall Classification C-9
Earthwork and Paving Classification C-12
Electrical (General) Classification C-10
Electrical Sign Classification C-45
Elevator Classification C-11
Fencing Classification C-13
Fire Protection Classification C-16
Flooring and Floor Covering Classification C-15
Framing and Rough Carpentry Classification C-5
General Manufactured Housing Classification C-47
Glazing Classification C-17
Insulation and Acoustical Classification C-2
Landscaping Classification C-27
Lathing and Plastering Classification C-35
Limited Specialty Classification C-61
Lock and Security Equipment Classification C-28
Low Voltage Systems Classification C-7
Masonry Classification C-29
Ornamental Metal Classification C-23
Painting and Decorating Classification C-33
Parking and Highway Improvement Classification C-32
Pipeline Classification C-34
Plumbing Classification C-36
Refrigeration Classification C-38
Roofing Classification C-39
Sanitation System Classification C-42
Sheet Metal Classification C-43
Solar Classification C-46
Steel, Reinforcing Classification C-50
Steel, Structural Classification C-51
Swimming Pool Classification C-53
Tile (Ceramic and Mosaic) Classification C-54
Warm-Air Heating, Ventilating
and Air Conditioning Classification
 C-20
Water Conditioning Classification C-55
Welding Classification C-60
Well-Drilling (Water) Classification C-57