Ohio to Maryland: journeyman plumber license reciprocity
Ohio does not issue a statewide journeyman plumber license, so there is nothing to transfer. Here is Maryland's standard path for out-of-state applicants.
Your origin state does not issue a statewide license at this level, so there is no license to transfer. The destination's standard out-of-state path is shown; expect to meet it in full.
Reference only, not legal advice. Rules change; confirm with the licensing board before you apply. Full disclaimer.
Out-of-state journey plumber by examination (PSI), unless a reciprocal license applies
Your out-of-state credentials give no advantage. You meet the destination's requirements from scratch.
For any origin that is not the District of Columbia, WSSC, or Baltimore County, Maryland does not waive the journey plumber exam. The License Requirements page sets eligibility at four years as an apprentice plumber plus 7,500 hours of apprentice work, a 32-hour backflow prevention certification, and the PSI journey exam. Upload proof of hours, backflow certification and a driver's license to PSI's Client Portal, then register at test-takers.psiexams.com/mdplu (centers in Baltimore, College Park, Hagerstown, Lanham and Salisbury). After passing, apply for the original Journeyman Plumber/Gas Fitter license and pay the $43.50 fee (July 1, 2025 schedule). Reciprocal licenses for DC, WSSC and Baltimore County are authored as agreements (WSSC/Baltimore County are municipal origins, not state codes). There is no published separate Maryland law or business exam on the pages reviewed.
Occ. & Prof. qualification and waiver sections after §12-101. WSSC and Baltimore County are Maryland municipal issuers, not origin state codes; they are recorded via acceptsMunicipalOriginLicenses and municipalNotes rather than agreements.origin. Insurance on plinsure.shtml is written for masters. Do not treat this default path as Reciprocity.
At a glance
- Trade exam
- Required
- Law / code exam
- Not required
- Out-of-state hours
- Count toward eligibility
What you must already have
- You must have held your Ohio license for at least 4 years.Four years as an apprentice plumber (Maryland License Requirements page).
- You must document at least 7,500 hours of qualifying work experience.7,500 hours of work as an apprentice plumber (Maryland License Requirements page). Out-of-state apprentice hours are uploaded to PSI as proof of hours worked.
- 32-hour backflow prevention certification, uploaded to PSI with the exam application
What you'll do to get licensed in Maryland
- 1Trade exam. Pass the destination's trade exam. Maryland Journeyman Plumber/Gas Fitter examination administered by PSI after the applicant uploads eligibility documents; required before applying for the license..
- 2Exam fee. Pay the exam fee. Fee, eligibility details, and processing steps are not published in a form we can list here. Please see the sources on this page to find out more..
- 3License fee. Pay the license or certificate fee ($43.50). Original Journeyman Plumber/Gas Fitter license fee, updated July 1, 2025 (renewal is also $43.50).
- 4Other. Copy of backflow certification, uploaded to PSI's Client Portal with the exam application.
- 5Other. Copy of driver's license, uploaded to PSI's Client Portal.
- 6Other. Proof of hours worked, uploaded to PSI's Client Portal.
Published fees on this path total $43.50, excluding exam-vendor fees, bonds, and insurance.
What you'll need to buy or arrange
Exam preparation
Most boards contract PSI, Prov, or ICC for exams. Check which code edition the exam is written to before buying a prep course.
- Trade exam
- Exam fee
How Maryland licenses journeyman plumbers
Maryland journeyman plumber · “Journeyman Plumber/Gas Fitter”
State license plus local requirements
Issued by Maryland State Board of Plumbing (Department of Labor)
Maryland issues a statewide Journeyman Plumber/Gas Fitter license (statutory name: journey plumber) through the State Board of Plumbing in the Department of Labor. A journey plumber provides plumbing services under the direction and control of a master plumber or limited master plumber. Qualification on the Board's License Requirements page is four years as an apprentice plumber plus 7,500 hours of apprentice work, a 32-hour backflow prevention certification, and the PSI journey exam. State plumber licenses are required throughout Maryland except Baltimore County and the Washington Suburban Sanitary Commission (WSSC) service area in Montgomery and Prince George's Counties, which issue their own plumber licenses. The original license fee is $43.50 (updated July 1, 2025). The Board issues reciprocal Journey Plumber/Gas Fitter licenses to holders licensed by the District of Columbia, WSSC, or Baltimore County (WSSC and Baltimore County applicants must hold both plumbing and gas licenses obtained by examination). Apprentice plumber licenses may be renewed for only two consecutive cycles before the journey exam is required (Bus. Occ. & Prof. §12-308.1).
How local licensing works in Maryland
The Board's home page states that State plumber and natural-gas-fitter licenses are required throughout Maryland except (1) Baltimore County and (2) areas served by WSSC in Prince George's and Montgomery Counties; those two jurisdictions issue their own licenses and have their own plumbing code. Propane-gas-fitter certificates from the State Board are valid statewide, including those counties. Inbound plumbers who will work only in Montgomery or Prince George's County should apply to WSSC, not (or not only) to the State Board; work only in Baltimore County goes through Baltimore County. Work in the remaining counties and Baltimore City uses the State Board license. The reciprocal-license page states the Board may issue a State journey or master plumber license to a person already licensed by WSSC or Baltimore County if that person holds both plumbing and gas licenses obtained by examination.
- Washington Suburban Sanitary Commission (Montgomery County)
- Washington Suburban Sanitary Commission (Prince George's County)
- Baltimore County
Why Ohio has nothing to transfer
Ohio journeyman plumber
Licensed by cities and counties
Issued by No state authority; Ohio Construction Industry Licensing Board licenses plumbing contractors only
Ohio does not issue a journeyman plumber license. The Ohio Construction Industry Licensing Board (OCILB) licenses individual plumbing contractors for commercial work under R.C. Chapter 4740, and R.C. 4740.01 defines everyone else on the job as a 'tradesperson' employed by a contractor, with no state license or card. Where a personal journeyman plumber credential exists it comes from a city ordinance: Toledo's Division of Building Inspection examines and licenses Plumbing Journeymen and registers apprentices, and Hamilton County Public Health directs consumers to journeyman or master plumber licenses issued by 'surrounding cities such as City of Cincinnati, Middletown or Norwood' because Ohio counties are not permitted to license plumbers. An out-of-state journeyman plumber license therefore has no state-level recognition in Ohio; it is useful only as proof of experience where a city requires it, or as one of the documents OCILB accepts (an active journeyman's card) toward the five-year tradesperson requirement for the state plumbing contractor exam.
How local licensing works in Ohio
How local licensing works. Ohio's contractor licensing statute (R.C. Chapter 4740) covers only the individual plumbing contractor license issued by OCILB and does not license tradespersons; any journeyman requirement is local. Most jurisdictions require only that plumbing work be done by or under a state-licensed plumbing contractor who has registered locally.
Toledo. The Division of Building Inspection issues Plumbing Journeyman and Apprentice licenses (alongside Electrical, HVAC and Refrigeration journeyman licenses and Plumbing, Electrical and Mechanical contractor licenses). New journeyman applicants file the Plumbing Journeyman Exam/Apprentice Application and sit a city exam; all licenses renew by December 31 each year, and a license that lapses past the deadline requires a new application, payment and exam. Toledo's HVAC application accepts a journeyman certificate obtained by testing in another city jurisdiction for its traveler registration; whether the plumbing application does the same was not confirmed.
- Toledo (Division of Building Inspection, Plumbing Journeyman and Apprentice licenses)
- Hamilton County Public Health (plumbing contractor registration only; OCILB license and $10,000 bond required)
- Cincinnati (journeyman/master plumber license per Hamilton County Public Health; city page not reviewed)
- Middletown (journeyman/master plumber license per Hamilton County Public Health; city page not reviewed)
- Norwood (journeyman/master plumber license per Hamilton County Public Health; city page not reviewed)
Common questions
- Do I have to take the Maryland journeyman plumber exam if I'm licensed in Ohio?
- Yes. Maryland requires the trade exam on this path.
- How long do I need to have held my Ohio license?
- At least 4 years before applying.
- What does it cost to get a Maryland journeyman plumber license from Ohio?
- Published fees on this path total $43.50, not counting exam vendor fees or bonds.
- Do my Ohio work hours count in Maryland?
- Yes. Documented out-of-state experience counts toward Maryland's eligibility requirements.
- Does it work the other way, from Maryland to Ohio?
- Not necessarily. Reciprocity is directed. Going from Maryland to Ohio, the mechanism is not applicable.
Sources
- Md. Code, Business Occupations and Professions §12-101 - Definitions (State Board of Plumbing licenses) · Md. Code, Bus. Occ. & Prof. §12-101 · Maryland General Assembly · Statute · verified September 16, 2026
- Maryland Department of Labor - Division of Occupational and Professional Licensing (boards index) · Maryland Department of Labor, Division of Occupational and Professional Licensing · Agency Page · verified September 16, 2026
- Maryland State Board of Plumbing - Taking the Exam (PSI) · Maryland Department of Labor, Division of Occupational and Professional Licensing · Agency Page · verified September 16, 2026
- Maryland State Board of Plumbing - Frequently Asked Questions (hub) · Maryland Department of Labor, Division of Occupational and Professional Licensing · Faq · verified September 16, 2026
- Maryland State Board of Plumbing - Forms and Fees (updated July 1, 2025) · Maryland Department of Labor, Division of Occupational and Professional Licensing · Agency Page · verified September 16, 2026
- Maryland State Board of Plumbing - Home · Md. Code, Bus. Occ. & Prof. Title 12 · Maryland Department of Labor, Division of Occupational and Professional Licensing · Agency Page · verified September 16, 2026
- Maryland State Board of Plumbing - Licensing Applications · Maryland Department of Labor, Division of Occupational and Professional Licensing · Agency Page · verified September 16, 2026
- Maryland State Board of Plumbing - Apply for a Reciprocal License · Maryland Department of Labor, Division of Occupational and Professional Licensing · Agency Page · verified September 16, 2026
- Maryland State Board of Plumbing - License Requirements · Maryland Department of Labor, Division of Occupational and Professional Licensing · Agency Page · verified September 16, 2026
Verified dates are when a person last opened each source and confirmed the facts above. Cite the board, not us.