Plumbing and HVAC rules in Maine
What the state says about plumbing and heating and cooling work, with the page each rule comes from. It's a summary of the published rules, not legal advice, and your city or county can have rules of its own.
Checked September 23, 2026
Plumbing licensing
Plumbers in Maine hold master or journeyman licenses from the Plumbers' Examining Board, and there's no separate business license.1, 2, 3
Heating and cooling licensing
Maine's Fuel Board licenses oil burner and solid fuel technicians and propane and natural gas technicians. For air conditioning work, ask the contractor which licenses they hold.4
Plumbing and mechanical codes
Maine's Uniform Building and Energy Code includes the 2021 International Mechanical Code, and towns under 4,000 people opt in to enforcing it.5
Permits to replace a water heater, furnace or AC
Ask your local building department whether replacing a water heater, furnace or AC needs a permit where you live.
Backflow testing
If your home has a backflow preventer, your water utility can tell you whether it needs testing and who can test it.
Sources
What plumbing and HVAC work costs in Maine
Published national ranges for plumbing, water heater, sewer, AC, heat pump and furnace jobs, and a planning estimate for your own job.
Contractors in Maine
71 plumbers and heating and cooling contractors are listed in Maine. Browse them by county, or ask for quotes and we'll pass your job to contractors near you.
Cite this page
“Plumbing and HVAC rules in Maine.” PlumbingInformationSite.com, updated September 27, 2026. https://plumbinginformationsite.com/me/rules/