Plumbing Contractor (Business Registration)
The business-level registration required for a company to perform plumbing contracting in Wisconsin. Must employ or contract with a Master Plumber.
How to Get a Plumbing Contractor (Business Registration) in Wisconsin
| Issuing Body | WI DSPS |
| Initial Fee | $25 |
| Exam Required | No |
| Experience Required | Business must employ or contract with at least one licensed Master Plumber. |
| Application | Apply online → |
License Lookup & Verification
Verify a plumbing contractor (business registration) holder's credentials through the Wisconsin DSPS online license lookup tool.
Verify a License →Frequently Asked Questions — Plumbing Contractor (Business Registration)
What does a plumbing contractor registration cost in Wisconsin?
The DSPS registration fee is $25 initially and $25 for biennial renewal. Additional costs include liability insurance, bonding requirements (varies by municipality), and local business licensing fees.
Can a journeyman plumber start a plumbing business?
No. A plumbing contractor business must have a Master Plumber associated with it. A journeyman can work for a registered plumbing contractor but cannot independently register a plumbing contracting business.
Do I need separate licenses for plumbing and HVAC work?
Yes. Plumbing and HVAC are separate credential tracks in Wisconsin. If your business performs both, you need a Plumbing Contractor registration with a Master Plumber and an HVAC credential for mechanical work.
Never miss a renewal deadline.
Track CE requirements, renewal dates, and fee changes for every license you hold. Automated alerts so you stay compliant without the spreadsheet.