- A-7 Excavating and Grading
- A-23 Asbestos
- A-20 Industrial Piping Contractor
- A-19B Pipelines and Conduit for Gas
- A-19A Pipelines and Conduits for Water
- A-19 Pipeline and Conduits
- A-17 Lines to Transmit Electricity
- A-16 Paving of Streets, Driveways, and Parking Lots
- A-15 Sewers, Drains, and Pipes
- A-12 Excavating, Grading, Trenching, and Surfacing
- A-10E Pool Alteration and Repair
- A-10C Repair of Pools and Spas
- A-10B Residential Spas Contractor
- A-10A Residential Pools
- A-10 Commercial and Residential Pools
- A - General Engineering
- C-2 Electrical Contractor
- C-37C Solar Air Conditioning Contractor
- C-15A Roofing Contractor
- C-7 Elevation and Conveyance Contractor
- C-6B Sign Contractor
- C-5 Concrete Contractor
- C-4 Painting and Decorating Contractor
- C-3B Finish Carpentry
- C-3A Carpentry and Repairs
- C-3 Carpentry, Maintenance, and Minor Repairs
- C-2G Photovoltaics
- C-2F Residential Wiring
- C-2E Lines to Transmit Electricity
- C-2D Low Voltage
- C-2C Fire Detection Contractor
- C-2A Electrical Wiring Contractor
- C-21G Industrial Piping
- C-42 Constructing, Altering or Improving Video Service Networks
- C-41C Fire Detection Contractor
- C-41B Fixed Fire Extinguishing Systems Contractor
- C-41A Automatic Fire Sprinklers Contractor
- C-41 Fire Protection Contractor
- C-37D Solar Pool Heating Contractor
- C-38 Gas Equipment Contractor
- C-37B Solar Space Heating
- C-37A Solar Water Heating Contractor
- C-37 Solar Contractor
- C-23 Drilling Wells
- C-21F Chilled and Hot Water Systems
- C-21E Solar Air Conditioning Contractor
- C-21D Refrigeration and Air Conditioning Maintenance Contractor
- C-21C Sheet Metal Contractor
- C-21B Air Conditioning Contractor
- C-21A Refrigeration Contractor
- C-21 Refrigeration and Air Conditioning Contractor
- C-20 Tiling Contractor
- C-1K Industrial Piping
- C-1J Systems to Replenish Breathing Air for Firefighter
- C-1I Chilled-Water Piping
- C-1H Water Heater Contractor
- C-1G Pipes and Vents for Gas Contractor
- C-1F Heating, Cooling and Circulating Air Contractor
- C-1E Sheet Metal
- C-2D
- C-1C Pipe and Duct Insulation
- C-1B Fire Sprinklers
- C-1A Boilers
- C-18 Masonry Contractor
- C-17 Lathing and Plastering
- C-15 Roofing and Siding Contractor
- C-14A Reinforcing Steel
- C-14 Steel Reinforcing and Erection
- C-13 Sheet Metal Contractor
- C-10 Landscape Contracting
- C-1 Plumbing and Heating Contractor
- C-4A Painting Contractor
- National Standard Residential Mechanical Class C W32
- National Standard Journeyman Mechanical W31
- National Standard Master Mechanical W29
- National Standard Master Plumber with Gas 674
- National Standard Residential Electrician 824
- National Residential Fire Sprinkler Design/Installation 680
- National Standard Master Electrician 701
- National Standard Residential Mechanical Class C 679
- National Standard Journeyman Plumber with Gas Piping 675
- National Standard Journeyman Plumber 673
- National Standard Journeyman Mechanical 671
- National Standard Building Contractor (B) 615
- National Standard Master Plumber 672
- National Standard General Building Contractor (A) 614
- National Standard Master Mechanical
- National Standard Shingle Roofing N15
- National Standard Residential Building Contractor (C)
- National Standard General Building Contractor (A) W11
- National Standard Roofing Contractor/Subcontractor W14
- National Standard Journeyman Mechanical N31
- National Standard Master Mechanical 670
- National Standard Residential Plumber 676
- National Standard Roofing Contractor/Subcontractor N14
- National Standard Journeyman Plumber W25
- National Standard Building Contractor
- National Residential Fire Sprinkler Design and Installation W33
- National Standard General Building Contractor (A) F11
- F11 National Standard General Building
- F12 National Standard Building Contractor (B)
- F13 National Standard Residential Building Contractor (C)
- F13 National Standard Residential Building Contractor
- F16 National Standard Master Electrician
- F16 National Standard Master Electrician
- F17 National Standard Journeyman Electrician
- F17 National Standard Journeyman Electrician
- F18 National Standard Residential Electrician
- F24 National Standard Master Plumber
- G17 National Standard Journeyman Electrician