The following are links to the Directory of classifications
(A) General Engineering Contractor
(B) General Building Contractor
(B-2) Residential Remodeling Contractor
(C) Specialty Contractor in one of the following sub-classifications
- 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
- C-10 – Electrical Contractor
- C-11 – Elevator Contractor
- C-12 – Earthwork and Paving Contractors
- C-13 – Fencing Contractor
- C-15 – Flooring and Floor Covering Contractors
- C-16 – Fire Protection Contractor
- C-17 – Glazing Contractor
- C-20 – Warm-Air Heating, Ventilating and Air-Conditioning Contractor
- C-21 – Building Moving/Demolition Contractor
- C-22 – Asbestos Abatement Contractor
- C-23 – Ornamental Metal Contractor
- C-27 – Landscaping Contractor
- C-28 – Lock and Security Equipment Contractor
- C-29 – Masonry Contractor
- C-31 – Construction Zone Traffic Control Contractor
- C-32 – Parking and Highway Improvement Contractor
- C-33 – Painting and Decorating Contractor
- C-34 – Pipeline Contractor
- C-35 – Lathing and Plastering Contractor
- C-36 – Plumbing Contractor
- C-38 – Refrigeration Contractor
- C-39 – Roofing Contractor
- C-42 – Sanitation System Contractor
- C-43 – Sheet Metal Contractor
- C-45 – Sign Contractor
- C-46 – Solar Contractor
- C-47 – General Manufactured Housing Contractor
- C-50 – Reinforcing Steel Contractor
- C-51 – Structural Steel Contractor
- C-53 – Swimming Pool Contractor
- C-54 – Ceramic and Mosaic Tile Contractor
- C-55 – Water Conditioning Contractor
- C-57 – Well Drilling Contractor
- C-60 – Welding Contractor
- C-61 – Limited Specialty
- ASB – Asbestos Certification
- HAZ – Hazardous Substance Removal Certification