- No dollar exemption is stated. The license law does not cover minor repairs to faucets, valves, pipes or appliances, clearing stoppages in drains, or a homeowner's work on the one-family home they own and live in (unless a local ordinance requires a license).
- To sit for the master exam you need at least 1,000 hours of plumbing work per year for at least 3 years as a Wisconsin licensed journeyman plumber, or an approved engineering degree related to plumbing.
- Plan for a trade exam.
- The Master Plumber license is valid for 4 years and renews by March 31, with 24 hours of approved continuing education. The renewal fee is $500.
Do you need a state license in Wisconsin?
Wisconsin licenses plumbing work at the state level through the Wisconsin Department of Safety and Professional Services (DSPS). Below is what the board asks for, in the order you will run into it.
No dollar exemption is stated. The license law does not cover minor repairs to faucets, valves, pipes or appliances, clearing stoppages in drains, or a homeowner's work on the one-family home they own and live in (unless a local ordinance requires a license).
Wisconsin license types for plumbing work
Wisconsin splits the work into 4 licenses. Pick the one that matches the jobs you take, since working outside its scope is the same as working without one.
| License | What it covers |
|---|---|
| Master Plumber | Can be in charge of plumbing installations and also work as a journeyman |
| Master Plumber Restricted Service and Restricted Appliance | Restricted master licenses |
| Journeyman Plumber | Licensed plumber who works under a master; 3 years as a journeyman qualifies you for the master exam |
| Plumbing Apprentice | Must be registered with DSPS |
Steps to get licensed in Wisconsin
- Register with DSPS as a plumbing apprentice and work under licensed plumbers.
- Earn your Journeyman Plumber license.
- Work at least 1,000 hours a year for 3 years as a licensed journeyman.
- Apply for the Master Plumber license in LicensE with the Trades Experience Form and pay the fees.
- Pass the open-book master exam with 70% or better.
- Renew every 4 years by March 31 with 24 hours of continuing education.
Experience and other requirements
Experience. To sit for the master exam you need at least 1,000 hours of plumbing work per year for at least 3 years as a Wisconsin licensed journeyman plumber, or an approved engineering degree related to plumbing.
The license to apply for. Master Plumber license.
Wisconsin plumbing exams
Trade exam. Yes. The master plumber exam is open book with a passing score of 70%, given at Pearson and DSPS exam locations.
Business and law exam. The official pages we read do not say. Check with the board (official site).
What it costs in Wisconsin
The board lists 4 fees along the way. These are the state's own numbers. Insurance, any bond, exam prep and your business registration come on top.
| Fee | Amount |
|---|---|
| Master Plumber credential fee | $500 |
| Master Plumber application fee | $20 |
| Journeyman Plumber credential fee | $180 |
| Master Plumber renewal (every 4 years) | $500 |
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 Master Plumber license is valid for 4 years and renews by March 31, with 24 hours of approved continuing education. The renewal fee is $500.
Reciprocity. Out-of-state plumbers can apply through a comity pathway, but must still pass the Wisconsin exam.
Good to know in Wisconsin
- Plumbing licenses go only to individuals, never to a firm or corporation, and cannot be transferred.
- Any partner, member, officer or employee of a company who superintends plumbing installations must hold a master plumber license.
- Apply and renew online through LicensE at license.wi.gov.
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 a plumber 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 (DSPS) and the official pages below, checked October 8, 2026. Fees and rules change, so confirm with the board before you file.
More for your trade: how plumbing companies run on Koira.