With over 14 years of experience in trade licensing, Contractor School Online (CSO) is your primary resource to help you pass your state contractor license exam! We offer online practice tests, study materials, books and more.

To become a certified contractor in Connecticut, you must pass a Business and Law exam. Depending on the trade you are interested in, you may also be required to pass a trade exam as well. Please use our Information Request Form to find out more.

Below is a list of available license classifications in Connecticut that we can help you to obtain.

Major Contractor

New Home Construction Contractor

Home Improvement Contractor

Home Improvement Salesman (owners, partners or officers of a registered contractor business are exempt from salesperson registration requirements)

Electrical Specialties

• E-1 Electrical Contractor

• T-1 Telephone

• L-1 Line Contractor

• L-3 High Voltage

• T-5 Low Voltage

• C-5 Combined Low Voltage (Alarm, Audio, Telephone)

Well Drilling:

• W-1 Water Well Contractor

• W-1 Water Well Driller

• W-1 Non Water Supply Contractor

• W-3 Non Water Supply Driller

S-1 Heating, Piping, COoling, and Sheet Metal Work Contractor:

• S-3 Heating Systems

• S-5 Hot Water and Steam Systems

• S-7 Hot Water and Steam Systems Including Oil Burners

• D-1 Warm Air, AC, and Refrigeration Systems

• D-3 Refrigeration Systems

• G-1 Gas Piping Systems

• G-9 Pipe Welding

• SM-1 All Sheet Metal

• SM-3 Domestic (Lt. Commercial)

• SM-5 Hood Systems

• B-1 Limited Burner

• B-3 All Burners

P-1 Plumbing and Piping Work Contractor:

• P-7 Sewer, Storm, and Water Lines

• P-9 Gas Line Tanks, Piping, and Pumping Equipment

• J-1 Water Pumps and Water Conditioning Equipment

• J-3 Lawn Sprinklers

• W-9 Drain Laying

• Solar

F-1 Fire Protection Sprinkler Systems Contractor:

• F-3 Liquid or Gas Fire Suppression Systems

Elevator:

• R1 Unlimited Elevator Contractor

• R2 Limited to Accessibility Systems

Every contractor is required to pass the OSHA exam.