Master Plumber/Gas Fitter License
General Info - Statewide License
Advanced level of licensure required for work in the plumbing trade in the state of Maryland.
A Master Plumber/Gas Fitter license allows an individual to provide plumbing services including installing, repairing, servicing, and replacing gas piping, gas utilization equipment, and associated accessories.
Obtaining the License
Ready to get your license? - Steps, Requirements, and Documents
Person must have held a journey license for at least two years; and
Person must have completed 3,750 hours of training under the direction and control of a licensed master plumber
Person must pass a comprehensive written examination with a passing score of at least 75%.
Maryland has reciprocal licensing agreements with the state of Delaware, WSSC and Baltimore County. If you are licensed in one of these three states and meet the other minimum qualifications you do not need to take an exam to be licensed in Maryland. The qualifications to obtain a reciprocal license in Maryland are found (click here)
Employment verification form.
Proof of current backflow certification.
Certificate of insurance proving $300,000 in general liability insurance.and $100,000 in property damage insurance.
Apply for the License
Ready to apply?
Maintaining Your License
Renewal and maintenance -
Maintaining your License (aka Related forms/requirements to maintain License/stay in good standing)
Complete renewal application.
Pay renewal fee.
Why the License is required?
The Maryland State Board of Plumbing licenses and regulates individuals who provide or assist in providing plumbing and gas services in Maryland. The Board also issues natural gas fitter licenses to qualified individuals who are non-plumbers. Both of these types of licenses are required for work throughout the state except for Baltimore County and the areas served by the Washington Suburban Sanitary Commission (WSSC). These two jurisdictions issue their own licenses and have their own plumbing code. The State Plumbing Board also issues a certificate to qualified individuals who are non-plumbers to provide propane gas services throughout the entire state.
What laws and regulations give Department of Labor, Licensing & Regulation the legal authority to issue this approval?
Title 12, Business Occupations and Professions and Professions, Annotated Code of Maryland, and Code of Maryland Regulations, Title 9.20