Contractors License Available Contractors License Classifications Below is a list of all contractors license classifications available through our school. We offer many different study tools to help you get prepared for the contractors license exam. A | General Engineering Contractor B | General Building Contractor B-2 | Residential Remodeling - New C-2 | Insulation and Acoustical Contractor C-4 | Boiler, Hot Water Heating and Steam Fitting Contractor C-5 | Framing and Rough Carpentry Contractor C-6 | Cabinet, Millwork and Finish Carpentry Contractor C-7 | Low Voltage Systems Contractor C-8 | Concrete Contractor C-9 | Drywall Contractor C10 | Electrical Contractor C11 | Elevator Contractor C12 | Earthwork and Paving Contractors C13 | Fencing Contractor C15 | Flooring and Floor Covering Contractors C16 | Fire Protection Contractor C17 | Glazing Contractor C20 | Warm-Air Heating, Ventilating and Air-Conditioning Contractor C21 | Building Moving/Demolition Contractor C22 | Asbestos Abatement Contractor C23 | Ornamental Metal Contractor C27 | Landscaping Contractor C28 | Lock and Security Equipment Contractor C29 | Masonry Contractor C31 | Construction Zone Traffic Control Contractor C32 | Parking and Highway Improvement Contractor C33 | Painting and Decorating Contractor C34 | Pipeline Contractor C35 | Lathing and Plastering Contractor C36 | Plumbing Contractor C38 | Refrigeration Contractor C39 | Roofing Contractor C42 | Sanitation System Contractor C43 | Sheet Metal Contractor C45 | Electrical Sign Contractor C46 | Solar Contractor C49 | Tree and Palm Contractor C50 | Reinforcing Steel Contractor C51 | Structural Steel Contractor C53 | Swimming Pool Contractor C54 | Ceramic and Mosaic Tile Contractor C55 | Water Conditioning Contractor C57 | Water Well Drilling Contractor C60 | Welding Contractor C61 | Limited Specialty C61 | Limited Specialty D03 | Awnings D04 | Central Vacuum Systems D06 | Concrete-Related Services D09 | Drilling, Blasting and Oil Field Work D10 | Elevated Floors D12 | Synthetic Products D16 | Hardware, Locks and Safes D21 | Machinery and Pumps D24 | Metal Products D28 | Doors, Gates and Activating Devices D29 | Paperhanging D30 | Foundation Jacking Contractor Pile Driving and Pressure D31 | Pole Installation and Maintenance D34 | Prefabricated Equipment D35 | Pool and Spa Maintenance D38 | Sand and Water Blasting D39 | Scaffolding D40 | Service Station Equipment and Maintenance D41 | Siding and Decking D42 | Non-Electrical Sign Installation D50 | Suspended Ceilings D52 | Window Coverings D53 | Wood Tanks D56 | Trenching Only D59 | Hydroseed Spraying D62 | Air and Water Balancing D63 | Construction Clean-up D64 | Non-specialized D65 | Weatherization and Energy Conservation