- A journeyman plumber (restricted) applicant needs one continuous year of work, at least 1,000 hours, plus shop training and related instruction.
- Plan for a trade exam.
Do you need a state license in Wisconsin?
Wisconsin licenses septic system work at the state level through the Wisconsin Department of Safety and Professional Services, POWTS Program. Below is what the board asks for, in the order you will run into it.
Steps to get licensed in Wisconsin
- Register with the department as a plumbing apprentice or learner and get the required work hours and training.
- Pass the plumber licensing exam for your license type.
- Work on POWTS only with a licensed master plumber in charge.
Experience and other requirements
Experience. A journeyman plumber (restricted) applicant needs one continuous year of work, at least 1,000 hours, plus shop training and related instruction.
The license to apply for. Plumber license that covers POWTS (such as master plumber, or master plumber restricted service).
Wisconsin septic installer exams
Trade exam. Yes, a licensing exam from the department.
Business and law exam. The official pages we read do not say. Check with the board (official site).
What it costs in Wisconsin
We could not confirm the current fee schedule on an official page. Check with the board before you budget: Wisconsin Department of Safety and Professional Services, POWTS Program.
Insurance and bond
Insurance. The official pages we read do not say. Check with the board (official site).
Bond. The official pages we read do not say. Check with the board (official site).
Renewal and licenses from other states
Renewal. The official pages we read do not say. Check with the board (official site).
Reciprocity. The official pages we read do not say. Check with the board (official site).
Good to know in Wisconsin
- State law defines plumbing to include building, installing, servicing and repairing private onsite wastewater treatment systems.
After you are licensed
The license lets you take the work. Getting the work is the next job.
- Register the business. If you work under a name other than your own, register it where your state asks (often the Secretary of State, sometimes the county), and keep the name the same on your license, your truck and your invoices.
- Claim your Google Business Profile. It is the listing people see when they search for septic installation near them. Fill in your service area, hours and real photos of your work.
- Put up a website that shows the license. Customers look for it before they call. Koira builds a contractor website for you and keeps it current.
- See where you stand. The free Koira report checks how your business shows up in search and on maps against shops near you.
Where this comes from
Every fact on this page comes from the Wisconsin Department of Safety and Professional Services, POWTS Program and the official pages below, checked October 9, 2026. Fees and rules change, so confirm with the board before you file.