Do you need a license to work as a plumber in Maryland?
Yes. In Maryland, an individual must be licensed by the State Board of Plumbing before providing plumbing services, and gas fitting needs a plumbing license, a natural gas fitter license or a propane gas certificate from the same board. The requirement does not apply to an individual who personally provides plumbing services in the individual’s own residence, but that individual may not make the final connection to a public or private disposal system or water supply system. Except where the title expressly says otherwise, the State plumbing title does not apply in Baltimore County or in the parts of Montgomery and Prince George’s counties under the Washington Suburban Sanitary Commission. This is Md. Code, Bus. Occ. & Prof. §§ 12-301, 12-101, 12-103.
| What | Maryland |
|---|---|
| Plumber license | State license (State Board of Plumbing) |
Source
Md. Code, Bus. Occ. & Prof. §§ 12-301, 12-101, 12-103
Read the statute in the Maryland Code (Maryland General Assembly): mgaleg.maryland.gov.
Checked against the statute on November 13, 2026.
This is a summary of a published statute, not legal advice. Rules change, local ordinances can add to them, and the terms of a specific lease may differ. Check the citation and speak to a lawyer before acting.
How Seayora uses this rule
A contractor on Seayora keeps each license with its issuing state, its expiry date and the last four digits of its number, and the business is warned before one lapses — on the website and both phone apps. A customer finding a pro on Seayora sees whether a license is on file.
Guides on this rule
- Contractor License Requirements by State: Every Trade — Which states require a state license for electricians, plumbers, HVAC, general and home improvement contractors, with the statute for each.
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The same question in other states
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- District of Columbia
- Florida
- Georgia
- Hawaii