Massachusetts (MA) Plumbing Code & Permit Rules
Massachusetts Plumbing Code (248 CMR) (Current) · Updated 2026-05-31
Data: State plumbing boards, ICC, IAPMO, EPA Last verified: 2026-05-31
Massachusetts requires licensed plumbers for most plumbing work and mandates annual backflow testing. These regulations help protect water quality but mean higher costs for homeowners compared to states that allow DIY work.
Plumbing Code
Massachusetts follows the Massachusetts Plumbing Code (248 CMR) (Current edition).
Independent state code; not based on IPC or UPC
Key Regulations
| Regulation | Status | Details |
|---|---|---|
| Plumbing Code | State-specific (Current) | Massachusetts Plumbing Code (248 CMR) |
| Homeowner DIY | Not allowed | Licensed plumber required for all plumbing work |
| Water Heater Permit | Required | Licensed plumber required |
| Backflow Testing | Annual, required | |
| Seismic Strapping | Not required | Water heater restraint |
DIY Plumbing in Massachusetts
Massachusetts requires a licensed plumber for most plumbing work. Licensed plumber required for all plumbing work
While this increases costs, it ensures:
- Work meets current code requirements
- Proper permitting and inspection
- Warranty and liability protection
- Safe connections to water and sewer systems
Backflow Prevention
Massachusetts requires annual backflow testing to protect the public water supply from contamination. Testing must be performed by a Certified tester.
Non-compliance penalty: Water service may be shut off if testing is not completed on schedule.
Water Conservation Requirements
Massachusetts follows federal water conservation standards. Federal minimums apply
Lead Service Line Replacement
Massachusetts has an active lead service line replacement program. Active replacement programs in older cities
Data Sources
- Massachusetts state plumbing board and licensing agency
- International Code Council (ICC)
- IAPMO
- EPA Safe Drinking Water Act
Updated as regulations change.
Need a licensed plumber in Massachusetts?
Plumbing regulations vary by city. Connect with a licensed professional who knows your local code requirements.
Find a Licensed Plumber →Frequently Asked Questions
What plumbing code does Massachusetts follow?
Massachusetts follows the Massachusetts Plumbing Code (248 CMR) (Current edition).
Can I do my own plumbing work in Massachusetts?
No, Massachusetts requires a licensed plumber for most plumbing work.
Do I need a permit to replace a water heater in Massachusetts?
Yes, Massachusetts requires a permit for water heater replacement. A licensed plumber is required for the installation.
Is backflow testing required in Massachusetts?
Yes, Massachusetts requires annual backflow testing.
Does Massachusetts require seismic strapping for water heaters?
No, Massachusetts does not require seismic strapping for water heaters. However, they remain a prudent option in areas with seismic activity.