Maryland plumber license & renewal
The requirements, the timing and the official sources. Everything we’ve verified, in one place.
License fee
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Not verified yet
Required hours
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Not verified yet
Exam
Journey and master applicants must pass a comprehensive written exam.
Renewal
All licenses and certificates issued by the State Board of Plumbing expire TWO YEARS FROM DATE OF ISSUE.
Before you begin
Agency guidance
State plumbing licensing covers Maryland except Baltimore County and WSSC-served areas of Prince George's and Montgomery Counties, which issue their own licenses.
Verified 2026-10-24 — source and quotation
required for work throughout the state except for Baltimore County and the areas served by the Washington Suburban Sanitary Committee - "WSSC" (Prince George's and Montgomery Counties). ... These two jurisdictions issue their own licensesOfficial source
Agency guidance
Original and renewal fees: master plumber/gas fitter $87.50; journeyman plumber/gas fitter $43.50.
Verified 2026-10-24 — source and quotation
Master Plumber/Gas Fitter - $ 87.50 ... Journeyman Plumber/Gas Fitter - $43.50 ... Master Plumber/Gas Fitter - $87.50 ... Journeyman Plumber/Gas Fitter $ 43.50Official source
Agency guidance
Renewal instructions: https://labor.maryland.gov/license/pl/plrenew.shtml
How to get this license
Use the agency’s requirements below to plan your next steps. Missing details stay marked.
Start with the licensing authority
Licensing board
Maryland State Board of Plumbing, Department of Labor
Verified 2026-10-24 — source and quotation
Maryland State Board of Plumbing ... Maryland Department of Labor
Official sourceOfficial agency page
Check the qualifications
Experience
Journey: hold apprentice license at least four years and complete 7,500 supervised hours. Master: hold journey license at least two years and complete 3,750 supervised hours.
Verified 2026-10-24 — source and quotation
held an apprentice plumber/gas fitter license for at least four years; and have completed 7,500 hours of training ... held a journey plumber/gas fitter license for at least two years; and completed 3,750 hours of training under the direction and control of a licensed master plumber/gas fitter
Official sourceEducation
Journey applicant: 32 hours of backflow prevention device testing training.
Verified 2026-10-24 — source and quotation
Person must have completed 32 hours of training in backflow prevention device testing
Official sourceExam
Journey and master applicants must pass a comprehensive written exam.
Verified 2026-10-24 — source and quotation
Person must pass a comprehensive written examination.
Official sourceInsurance
To contract work: at least $300,000 general liability and $100,000 property damage coverage; umbrella coverage does not satisfy this requirement.
Verified 2026-10-24 — source and quotation
General Liability Insurance in the amount of at least $300,000 AND Property Damage Insurance in the amount of at least $100,000. Any umbrella policy coverage is not acceptable
Official sourceReview fees and apply
Application fee
Not verified yet
Exam fee
Not verified yet
License fee
Not verified yet
Apply with the agency
Reciprocity
The FAQ lists Delaware for master plumber/gas fitter only; Baltimore County and WSSC for master/journey applicants holding both plumbing and gas credentials.
Verified 2026-10-24 — source and quotation
The State Plumbing Board reciprocates with the state of Delaware for the Master Plumber/Gasfitter license ONLY ... The Board may issue a reciprocal master or journey license to plumbers who are currently licensed in Baltimore County or Washington Suburban Sanitary Commission ... you must hold BOTH the plumbing and gas portion of the license.Official source
Official sources and verification (13)
Last verified 2026-10-24. Each quotation supports the corresponding published value.
Maryland State Board of Plumbing ... Maryland Department of LaborOfficial source
Verified 2026-10-24
held an apprentice plumber/gas fitter license for at least four years; and have completed 7,500 hours of training ... held a journey plumber/gas fitter license for at least two years; and completed 3,750 hours of training under the direction and control of a licensed master plumber/gas fitterOfficial source
Verified 2026-10-24
Person must have completed 32 hours of training in backflow prevention device testingOfficial source
Verified 2026-10-24
Person must pass a comprehensive written examination.Official source
Verified 2026-10-24
General Liability Insurance in the amount of at least $300,000 AND Property Damage Insurance in the amount of at least $100,000. Any umbrella policy coverage is not acceptableOfficial source
Verified 2026-10-24
All licenses and certificates issued by the State Board of Plumbing expire TWO YEARS FROM DATE OF ISSUE.Official source
Verified 2026-10-24
The State Plumbing Board reciprocates with the state of Delaware for the Master Plumber/Gasfitter license ONLY ... The Board may issue a reciprocal master or journey license to plumbers who are currently licensed in Baltimore County or Washington Suburban Sanitary Commission ... you must hold BOTH the plumbing and gas portion of the license.Official source
Verified 2026-10-24
required for work throughout the state except for Baltimore County and the areas served by the Washington Suburban Sanitary Committee - "WSSC" (Prince George's and Montgomery Counties). ... These two jurisdictions issue their own licensesOfficial source
Verified 2026-10-24
Master Plumber/Gas Fitter - $ 87.50 ... Journeyman Plumber/Gas Fitter - $43.50 ... Master Plumber/Gas Fitter - $87.50 ... Journeyman Plumber/Gas Fitter $ 43.50Official source
Verified 2026-10-24
Keep exploring.
Same license in other states
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- District of Columbia
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
Last verified 2026-10-24.
Official sources (5)
Not legal or tax advice. Confirm with the official agency before filing.