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 Maryland, 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 Maryland that we can help you to obtain.

Home Improvement:

• Contractor
• Subcontractor
• Salesman

Plumbing:

• Apprentice
• Journeyman
• Master
• Propane gas fitters certificate

HVACR:

• Apprentice
• Journeyman
• Limited
• Restricted Master
• Master

Electrical:

• Master

Every contractor is required to pass the OSHA exam.