Maryland — plumbing code & licensing
Verified
The code
| Code family | IPC |
| Edition in force | 2018 |
| Effective date | 2019-12-30 |
| Adopted by | State Board of Plumbing, Dept. of Labor (COMAR 09.20.01, State Plumbing Code) |
| Adoption source | https://mgaleg.maryland.gov/pubs/committee/AELR/19-114P-Regulation.pdf |
| State amendments | Amendments are inside the adoption instrument; no separate document |
Licensing
| Model | state individual |
| Authority | State Board of Plumbing, Dept. of Labor, Division of Occupational & Professional Licensing |
| Licensing source | https://labor.maryland.gov/license/pl/plad.shtml |
Permits & inspections
Not yet recorded.
How this record was verified
| Adoption | Verified |
| Amendments | Verified |
| Licensing | Verified |
| Permits & inspections | Not yet verified |
Working notes
COMAR 09.20.01.01 incorporates by reference the 2018 International Plumbing Code (with Maryland modifications in COMAR 09.20.01.02-.06), adopted by the State Board of Plumbing under Business Occupations and Professions Article 12-205 and 12-207; the incorporating amendment took effect December 30, 2019 (46:26 Md. R. 1163). A non-official legal site claims Maryland is on the 2021 IPC; that claim is NOT supported by the COMAR text read in this lane and is not recorded as fact. SCOPE SPLIT: plumbing for industrialized/modular buildings and state-owned buildings runs through the Division of Labor and Industry's Maryland Building Performance Standards / Model Performance Code (COMAR 09.12.51 / 09.12.50), which for industrialized buildings incorporates the 2021 IPC but defers to the Board of Plumbing's code for other construction; counties must enforce the State Plumbing Code or adopt a local code meeting or exceeding it (Bus. Occ. 12-206). Licensing classes include Master Plumber, Journey Plumber, Apprentice Plumber, and master/journey natural gas fitter categories.
Reference only. Compiled from the cited official sources as of the date shown; adoptions and rules change. Confirm with the authority having jurisdiction before designing or permitting work.