How to Become a Plumber in Maryland
Maryland plumbing and gasfitting authority depends on the work address. The state board licenses plumbing and gas services in most areas, while Baltimore County and WSSC-served areas use their own licenses and plumbing codes; statewide propane-gas-fitter certification is a separate category. The rules can differ by state, city, and type of work.
Regulator: Maryland State Board of Plumbing, WSSC Water, Baltimore County, and local authorities
Employment outlook: Maryland vs United States
These state and national projections describe the occupation. They do not promise a job, wage, or opening.
Maryland state record
2024–2034
- Employment (2024)
- 12,415
- Projected (2034)
- 13,186
- Projected change
- 6.21% (2024–2034)
- Annual openings
- 1,112
Source note: Maryland’s official labor-market workbook is the source of record for the plumber, pipefitter, or steamfitter 2024–2034 projection row. The wage ladder is a separate statewide, all-industry May 2025 Maryland OEWS estimate; neither series is a job offer or individual earnings prediction.
United States benchmark
2024–2034; national benchmark, not a state estimate for Maryland
- Employment (2024)
- 504,500
- Projected (2034)
- 527,200
- Projected change
- 5% (2024–2034)
- Annual openings
- 44,000
National median wage benchmark: $63,800
Annual openings are the source’s estimate and may include growth and replacement demand. They do not count jobs available to you now.
Official sources used for this record (20)
These links show the source trail for the record. A listing is a citation, not an endorsement; confirm volatile rules and local requirements before acting.
- Maryland Building Codes AdministrationMaryland Department of Labor · accessed 2026-09-15
- Maryland state building codesMaryland Department of Labor · accessed 2026-09-15
- Maryland building-code jurisdiction directoryMaryland Department of Labor · accessed 2026-09-15
- Maryland Office of ApprenticeshipMaryland Department of Labor · accessed 2026-09-15
- Maryland apprenticeship locatorMaryland Department of Labor · accessed 2026-09-15
- Maryland apprenticeship overviewMaryland Department of Labor · accessed 2026-09-15
- Maryland live apprenticeship resultsMaryland Department of Labor · accessed 2026-09-15
- Maryland occupational projections indexMaryland Department of Labor · accessed 2026-09-15
- Maryland 2024–2034 occupational projections pageMaryland Department of Labor · accessed 2026-09-15
- Maryland OEWS wage landing pageMaryland Department of Labor · accessed 2026-09-15
- Maryland official occupational projections workbookMaryland Department of Labor · accessed 2026-09-15
- Maryland official OEWS wage workbookMaryland Department of Labor · accessed 2026-09-15
- Projections Central Maryland cross-checkProjections Central · accessed 2026-09-15
- Maryland Board of PlumbingMaryland Department of Labor · accessed 2026-09-15
- Maryland plumbing license requirementsMaryland Department of Labor · accessed 2026-09-15
- Maryland plumbing reciprocal licensingMaryland Department of Labor · accessed 2026-09-15
- Baltimore County plumbing/gasfitting permitsBaltimore County Department of Permits, Approvals and Inspections · accessed 2026-09-15
- WSSC plumbing inspectionsWSSC Water · accessed 2026-09-15
- WSSC plumber licensesWSSC Water · accessed 2026-09-15
- Montgomery County home-improvement permitsMontgomery County Department of Permitting Services · accessed 2026-09-15
Do I need to pay for school first?
Do not treat a listed course as a required first step. We have not established a school requirement for every route. Ask the regulator and the employer or apprenticeship sponsor these questions before paying:
- Can I apply for supervised paid work before enrolling? Which registration or license must I hold first?
- Is classroom training required for this exact route, or is it one of several options?
- Does this specific approved course count toward the qualification I want? Who confirms that credit?
- What can I legally do after completion, and what experience or examination remains?
- What are the full costs and refund terms before I pay a deposit?
These are verification questions, not findings about this pathway. A source-checked training listing does not establish school necessity, legal authority, a paid position, or an open application.
Baltimore County and WSSC-served parts of Prince George’s and Montgomery counties issue their own plumbing licenses and use their own codes. WSSC inspections and local permits must be checked separately from a Maryland state license.
Source record checked
We checked the official sources for this state and trade on the review date shown.
Checked recently: 2026-09-15 · source period May 2025. This date is a reminder to check the information. It does not mean it was checked again.
What this does not prove: This is not a job offer or a promise of a training place, a job, a license, or a certificate. It does not show that an employer is involved.
Your next best steps
Start with a conversation, not a resignation. Use these steps to check your options. They do not guarantee a job, a training place, or a license or certificate.
Check which work you may do
Check the Maryland State Board of Plumbing, WSSC Water, Baltimore County, and local authorities page. Ask which Plumber work you may do, who must supervise it, and which exams and fees apply. Make sure the rules are for workers, not just contractors or businesses. This is not a job offer or a promise of a training place, a job, a license, or a certificate. It does not show that an employer is involved.
Ask what the training qualifies you to do
Ask the school what you will learn, how much hands-on practice you will get, and what you can do after finishing. A course completion certificate is not a license or a job offer. This is not a job offer or a promise of a training place, a job, a license, or a certificate. It does not show that an employer is involved.
Ask about current jobs and training places
Ask whether there is a paid job now, a training program to apply to, or only a list for future applicants. Check starting pay, work hours, tools, travel, benefits, how they choose applicants, and what happens if the job or training ends early, or if you leave early. This is not a job offer or a promise of a training place, a job, a license, or a certificate. It does not show that an employer is involved.
Questions to take with you
Use these with a regulator, employer, sponsor, or training provider. Save the answers in writing when possible.
- 1Are these Plumber rules for individual workers, contractors or businesses, or both? Check the linked licensing authority for current rules, the work you may do, and how to apply.
- 2Which work or class hours count toward the license, certificate, or required experience? Who keeps the records? Check the linked licensing authority for current rules, the work you may do, and how to apply.
- 3Can I start paid work under supervision before I earn the license or certificate? Who must supervise me? Check the linked licensing authority for current rules, the work you may do, and how to apply.
- 4Is there a paid job or training place open now? Is this only a list for future applicants, or an old listing? Check the linked licensing authority for current rules, the work you may do, and how to apply.
- 5What is the starting pay, and how could it rise? Can I get those terms in writing? Check the linked licensing authority for current rules, the work you may do, and how to apply.
- 6Which fees, tools, travel, exams, insurance, or equipment will I need to pay for? Check the linked licensing authority for current rules, the work you may do, and how to apply.
- 7Does finishing this program count toward Maryland requirements? Does the licensing authority need to approve it separately? Check the linked licensing authority for current rules, the work you may do, and how to apply.
Steps to qualify in Maryland
Click on each stage to inspect the legal requirements, hours, fees, and exam specifications.
Maryland apprentice plumber, gasfitter, or applicable local apprentice license
Enter under the relevant state or local authority
Maryland distinguishes plumbing/gasfitter, natural-gas-fitter, and propane-gas-fitter authority. Baltimore County and WSSC-served areas use their own licensing and code systems, so the work address must be identified before choosing the entry route.
- Classroom hours:
- Program and jurisdiction dependent
- Supervised work hours:
- Supervised plumbing or gasfitting work
Stored requirement from this source-checked record. Read the stage's official source and confirm current eligibility, accepted credits, and how hours must be documented.
A state or exam fee is not the total cost. Tuition, tools, protective equipment, travel, application waiting time, unpaid study, and lost income need a separate written budget. A complete route cost is not verified here.
Key requirements in this record
- Identify whether Maryland, Baltimore County, or WSSC controls the work location
- Obtain the apprentice status or license required by that authority
- Confirm supervision, tools, safety training, schedule, and wage terms with the employer or sponsor
Online Training Applicability
Training, experience, and continuing education
These requirements describe different things: related instruction, supervised on-the-job experience, wiring-school instruction, and renewal education. They are not interchangeable and do not prove a current sponsor seat, employer opening, or placement result.
Continuing education
The reviewed sources did not establish one statewide continuing-education total; confirm current board, WSSC, or county renewal requirements.
Selected-stage instruction
Maryland apprentice plumber, gasfitter, or applicable local apprentice license
Program and jurisdiction dependent
Selected-stage field experience
Maryland apprentice plumber, gasfitter, or applicable local apprentice license
Supervised plumbing or gasfitting work
Stage-by-stage hour qualifiers
Maryland apprentice plumber, gasfitter, or applicable local apprentice license
Instruction/training: Program and jurisdiction dependent
On-the-job experience: Supervised plumbing or gasfitting work
Maryland journey plumber/gasfitter or applicable local credential
Instruction/training: At least 32 hours of backflow-prevention-device-testing training on the state route
On-the-job experience: At least 7,500 hours under a licensed master plumber on the state route
Maryland master plumber/gasfitter or applicable local master license
Instruction/training: Route and gasfitter category dependent
On-the-job experience: At least 3,750 hours under a licensed master plumber on the state route
Questions to verify for Maryland career switchers
When can I legally begin earning money?
Paid apprentice or supervised entry work may be possible through an employer or sponsor; the sources do not guarantee a position, wage, benefits, or eligibility outcome.
Does online trade training count toward my license?
Online plumbing theory can support preparation, but qualifying supervised hours, backflow training, examinations, license authority, permits, inspections, and local code compliance remain separate.
What does it take to start my own contracting business?
Independent plumbing or gasfitting work requires the correct state, WSSC, or Baltimore County license; permits, inspections, backflow requirements, business setup, insurance, tools, vehicle, and working capital must be checked for the job address.
Will another state accept my license or certificate?
This record does not list a verified reciprocity agreement. Check the current transfer or examination-waiver rules with the relevant board before assuming that a credential or work history transfers to another state.
Ready to map your personal transition into Maryland Plumber work?
Input your current income, budget, and evening availability to generate a step-by-step planning outline with listed training options. Check each provider and regulator before enrolling.