Sonoma County Construction Inc

ASB: Asbestos Certification

An add-on certification that allows a contractor to perform asbestos abatement work within the scope of their existing license classification(s). This is not a standalone license.

Not authorized: Can only perform abatement within existing classification scope.

B: General Building Contractor

Authorizes construction of structures including residential, commercial, and industrial buildings requiring at least two unrelated building trades or crafts. May take prime contracts or subcontracts for framing or carpentry. May subcontract all specialty work but must hold the appropriate C license to self-perform specialty trade work.

Not authorized: Cannot self-perform specialty trade work (electrical, plumbing, HVAC, etc.) without holding the corresponding C license. Cannot contract for C-16 Fire Protection or C-57 Well Drilling without the appropriate license or subcontractor.

C-10: Electrical Contractor

Places, installs, erects, or connects electrical wires, fixtures, appliances, apparatus, raceways, conduits, solar photovoltaic cells, or any part thereof which generate, transmit, transform, or utilize electrical energy.

Not authorized: Electricians working under a C-10 must be certified per CA Labor Code.

C-13: Fencing Contractor

Constructs, erects, alters, or repairs all types of fences, corrals, runs, railings, game court enclosures, guard rails, barriers, playground equipment, backstops, posts, flagpoles, and gates.

Not authorized: Does not include masonry walls (see C-29).

C-21: Building Moving/Demolition Contractor

Raises, lowers, cribs, underpins, demolishes, moves, or removes structures including their foundations.

Not authorized: Does not include alterations, additions, repairs, or rehabilitation of permanently retained portions of structures.

C-33: Painting and Decorating Contractor

Prepares surfaces by scraping, sandblasting, or other means and applies paints, papers, textures, fabrics, pigments, oils, varnishes, shellacs, stains, waxes, adhesives, and other coatings for decorating, protecting, fireproofing, and waterproofing.

C-35: Lathing and Plastering Contractor

Coats surfaces with mixtures of sand, gypsum plaster, lime and water, or cement and water, applied by trowel or spray for soundproofing and fireproofing. Installs lath, metal studs, and support materials for plaster coatings.

C-36: Plumbing Contractor

Provides means for a supply of safe water and proper disposal of fluid waste, including piping, storage tanks, venting, gas appliances and connections, water and gas piping, water heating equipment including solar, and health and safety devices such as backflow preventers and gas earthquake valves.

Not authorized: Does not include forced warm-air units (see C-20).

C-39: Roofing Contractor

Installs products and repairs surfaces that seal, waterproof, and weatherproof structures using asphaltum, pitch, tar, felt, glass fabric, urethane foam, metal roofing systems, shakes, shingles, roof tile, slate, and other roofing materials.

HAZ: Hazardous Substance Removal Certification

An add-on certification for removal of hazardous substances. Only issued to contractors holding A, B, C-12, C-21, C-36, C-57, or C-61/D-40 licenses.

Not authorized: Restricted to contractors holding qualifying base licenses.