Plumbing and HVAC rules in Oregon
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
In Oregon, a plumbing business holds a plumbing contractor license from the Building Codes Division plus a Construction Contractors Board license, and plumbers hold journeyman licenses.1, 2, 3
Heating and cooling licensing
Anyone working as a contractor in Oregon needs a Construction Contractors Board license, and the board's specialty license page lists no class just for heating and cooling.4
Plumbing and mechanical codes
Your local building department can tell you which plumbing and mechanical codes apply where you live.
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 Oregon
Published national ranges for plumbing, water heater, sewer, AC, heat pump and furnace jobs, and a planning estimate for your own job.
Contractors in Oregon
511 plumbers and heating and cooling contractors are listed in Oregon. 110 hold an active USDOT registration. 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 Oregon.” PlumbingInformationSite.com, updated September 27, 2026. https://plumbinginformationsite.com/or/rules/