Initial Fee
$25
First-time application
Renewal Fee
$25
Every Biennially (even-numbered years, December 14)
Renewal Period
Biennially (even-numbered years, December 14)
License validity
CE Hours Required
None
No continuing education required

How to Get a Plumbing Contractor (Business Registration) in Wisconsin

RequirementsVerified 2026-02-01
Issuing BodyWI DSPS
Initial Fee$25
Exam RequiredNo
Experience RequiredBusiness must employ or contract with at least one licensed Master Plumber.
ApplicationApply 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.

For Licensed Professionals

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.

No credit card required. Free for up to 3 locations.