Michigan — plumbing code & licensing
Verified
The code
| Code family | Michigan Plumbing Code - Construction Code Part 7 (R 408.30701 et seq.), adopting the IPC by reference with Michigan amendments |
| Edition in force | 2021 Michigan Plumbing Code: Part 7 rule R 408.30701 adopts the International Plumbing Code, 2021 second printing edition, including Appendices B, C, D and E, by reference with stated exceptions, plus Michigan amendments and additions (rule set 2022-56 LR) |
| Effective date | 2024-03-12 |
| Adopted by | Director of the Michigan Department of Licensing and Regulatory Affairs (Bureau of Construction Codes), under Section 4 of the Stille-DeRossett-Hale Single State Construction Code Act, 1972 PA 230 (MCL 125.1504) |
| Adoption source | https://ars.apps.lara.state.mi.us/Transaction/RFRTransaction?TransactionID=1415 |
| State amendments | State amendments at their own official document — https://ars.apps.lara.state.mi.us/Transaction/DownloadFile?FileName=FinalRule%28s%29.pdf&FileType=FinalRule&TransactionID=1415&EffectiveDate=3%2F12%2F2024&ReturnHTML=True |
Licensing
| Model | State individual licensing plus contractor licensing: plumbing contractor, master plumber, and journey plumber licenses and apprentice plumber registration under the Skilled Trades Regulation Act, 2016 PA 407, Article 11 (MCL 339.6101-339.6133); Section 339.6125 addresses issuance of plumbing permits by governmental subdivisions |
| Authority | Michigan Department of Licensing and Regulatory Affairs, Bureau of Construction Codes, with the State Plumbing Board (MCL 339.6105) |
| Licensing source | https://legislature.mi.gov/Laws/Index?ObjectName=mcl-chap339 |
| License classes | https://legislature.mi.gov/Laws/Index?ObjectName=mcl-chap339 |
Permits & inspections
Part 7 rule R 408.30716 (amending IPC Section 109.1): fees prescribed by the act are paid to the enforcing agency of the jurisdiction before a permit to begin work may be issued. Rules R 408.30725f to R 408.30725h add inspection and testing requirements for backflow prevention assemblies (IPC Sections 312.10-312.10.2).
How this record was verified
| Adoption | Verified |
| Amendments | Verified |
| Licensing | Verified |
| Permits & inspections | Verified |
Working notes
Scope: detached one- and two-family dwellings and townhouses of not more than three stories follow the Michigan Residential Code instead of Part 7 (R 408.30711, amending IPC Section 101.2). The Part 7 rules were filed November 13, 2023 and took effect 120 days after filing. A proposed Part 7 update to the 2024 IPC (rule set 2025-8 LR) was reported as published in the July 15, 2026 Michigan Register but not yet filed or effective as of late October 2026; that status rests on a non-official tracker summary and was not confirmed from an official source in this pass, so the 2021 IPC-based code is recorded as in force.
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.