A – General Engineering: A general engineering contractor’s principal business is in connection with fixed works requiring specialized engineering knowledge and skill, including the following divisions or subjects: irrigation More

B – General Building: a) Except as provided in this section, a general building contractor is a contractor whose principal contracting business is in connection with any structure built More

B-2 – Residential Remodeling: A residential remodeling contractor is a contractor whose principal contracting business is in connection with any project to make improvements to, on, or in an existing residential wood frame structure, and the project requires the use of at least three unrelated building trades or crafts for a single contract. More

C-2 – Insulation: An insulation and acoustical contractor installs any insulating media and preformed architectural acoustical materials for the purpose of temperature and/or sound control. More

C-4 – Boiler, Hot-Water Heating and Steam Fitting: A boiler, hot-water heating and steam fitting contractor installs, services and repairs power boiler installations More

C-5 – Carpentry: A framing and rough carpentry contractor performs any form work, framing or rough carpentry More

C-6 – Cabinetry & Millwork: A cabinet, millwork and finish carpentry contractor makes cabinets, cases, sashes, doors, trims, nonbearing partitions More

C-7 Low Voltage: A communication and low voltage contractor installs, services and maintains all types of communication and low voltage systems which are energy More

C-8 Concrete: A concrete contractor forms, pours, places, finishes and installs specified mass, pavement, flat and other concrete work; and places and sets screeds More

C-9 Drywall: A drywall contractor lays out and installs gypsum wall board and gypsum wall board assemblies including nonstructural metal framing members, and performs the taping More

C-10 Electrical: An electrical contractor places, installs, erects or connects any electrical wires, fixtures, appliances, apparatus, raceways, conduits, solar photovoltaic cells More

C-11 Elevator: An elevator contractor fabricates, erects, installs and repairs elevators, including sheave beams, motors, sheaves, cable and wire rope, guides, cab, counterweights More

C-12 Earthwork and Paving: An earthwork and paving contractor digs, moves, and places material forming the surface of the earth, other than water More

C-13 Fencing: A fencing contractor constructs, erects, alters, or repairs all types of fences, corrals, runs, railings, cribs, game court enclosures, guard rails More

C-14 Metal Roofing: License is no longer issued.

C-15 Flooring and Floor Covering: A flooring and floor covering contractor prepares any surface for the installation of flooring and floor coverings, and installs carpet More

C-16 Fire Protection: A Fire protection contractor lays out, fabricates and installs all types of fire protection systems; including all the equipment associated More

C-17 Glazing: A glazing contractor selects, cuts, assembles and/or installs all makes and kinds of glass, glass work, mirrored glass, and glass substitute materials for glazing More

C-20 Warm-Air Heating, Ventilating & Air-Conditioning: A warm-air heating, ventilating and air-conditioning contractor fabricates, installs, maintains  More

C-21 Building moving/Demolition: A building moving/demolition contractor raises, lowers, cribs, underpins, demolishes and moves or removes structures, More

C-22 Asbestos Abatement: An asbestos abatement contractor performs abatement, including containment, encapsulation, or removal, and disposal of asbestos containing More

C-23 Ornamental Metal: An ornamental metals contractor assembles, casts, cuts, shapes, stamps, forges, welds, fabricates and installs, sheet, rolled and cast, brass More

C-26 Lathing: License no longer issued. See License C-35 Lathing and Plastering below.

C-27 Landscaping: A landscape contractor constructs, maintains, repairs, installs, or subcontracts the development of landscape systems and facilities for public More

C-28 Lock and Security Equipment: A lock and security equipment contractor evaluates, sets-up, installs, maintains and repairs all doors and door assemblies, gates, locks More

C-29 Masonry Contractor: A masonry contractor installs concrete units and baked clay products; concrete, glass and clay block; natural and manufactured stone; terra cotta More

C-31 Construction Zone Traffic Control: A construction zone traffic control contractor prepares or removes lane closures, flagging, or traffic diversions, utilizing More

C-32 Parking and Highway Improvement: A parking and highway improvement contractor applies and installs protective coatings, vehicle stops, guard rails More

C-33 Painting & Decorating: A painting and decorating contractor prepares by scraping, sandblasting or other means and applies any of the following: paints More

C-34 Pipeline: A pipeline contractor fabricates and installs pipelines for the conveyance of fluids, such as water, gas, or petroleum, or for the containment More

C-35 Lathing and Plastering: A lathing and plastering contractor coats surfaces with a mixture of sand, gypsum plaster, quick-lime or hydrated lime and water More

C-36 Plumbing: A plumbing contractor provides a means for a supply of safe water, ample in volume and of suitable temperature for the purpose intended and the proper disposal More

C- 38 Refrigeration: A refrigeration contractor constructs, fabricates, erects, installs, maintains, services and repairs refrigerators, refrigerated rooms, and insulated More

C-39 Roofing: A roofing contractor installs products and repairs surfaces that seal, waterproof and weatherproof structures. This work is performed to prevent water More

C-42 Sanitation System: A sanitation system contractor fabricates and installs cesspools, septic tanks, storm drains, and other sewage disposal More

C-43 Sheet Metal: A sheet metal contractor selects, cuts, shapes, fabricates and installs sheet metal such as cornices, flashings, gutters, leaders, pans More

C-45 Electrical Sign: An electrical sign contractor fabricates, installs and erects electrical signs, including the wiring of such electrical signs. More

C-46 Solar: A solar contractor installs, modifies, maintains, and repairs active solar energy systems. An active solar energy system consists of components which are thermally More

C-47 Manufactured Housing: (a) A general manufactured housing contractor installs, alters, repairs or prepares for moving any type of manufactured housing as More

C-49 Tree and Palm: A Tree and Palm contractor plants, maintains, and removes trees and palms. The duties include pruning, stump grinding, and tree, palm, or limb guying. More

C-50 Reinforcing Steel: A reinforcing steel contractor fabricates, places and ties steel mesh or steel reinforcing bars (rods), of any profile, perimeter More

C-51 Structural Steel: A structural steel contractor fabricates and erects structural steel shapes and plates, of any profile, perimeter or cross-section, that are More

C-53 Swimming Pool: A swimming pool contractor constructs swimming pools, spas or hot tubs, including installation of solar heating equipment using those trades More

C-54 Ceramic & Mosaic Tile: A ceramic and mosaic tile contractor prepares surfaces as necessary and installs glazed wall, ceramic, mosaic, quarry, paver, faience More

C-55 Water Conditioning: A water conditioning contractor installs water conditioning equipment with the use of only such pipe and fittings as are necessary to connect More

C-57 Water Well Drilling: A well drilling contractor installs and repairs water wells and pumps by boring, drilling, excavating, casing, cementing and cleaning to provide a supply of uncontaminated water. More

C-60 Welding: A welding contractor causes metals to become permanently attached, joined and fabricated by the use of gases and electrical energy, which creates temperatures More

C-61 Limited Specialty: (a) Limited specialty is a specialty contractor classification limited to a field and scope of operations of specialty contracting for which More

The CSLB has listed the C-61 classification into “D” categories for administrative tracking. Click here for a full list.

ASB – Asbestos Certification
No contractor shall engage in asbestos-related work, as defined in Section 6501.8 of the Labor Code, which involves 100 square feet or more of surface area of asbestos More

HAZ – Hazardous Substance Removal Certification
No contractor shall engage in a removal or remedial action, as defined in subdivision (d), unless the qualifier for the license has passed an approved hazardous More

HIC – Home Improvement Certification: No longer issued.