Master Plumber

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​ Now Live for Trades Credentials and Renewals!

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All initial, reinstatement, and renewal applications for a Trades credential must now be made through LicensE, your online, self-guided licensing platform.

• To apply for a license or renew your license, go to license.wi.gov.
  
• For those renewing in LicensE for the first time or looking for more information about LicensE, including exams, refer to the “Trades LicensE Information" document.
  
• Please review the LicensE Applicant User Guide for help. 
  
• If you are having trouble with anything, please submit a support ticket at this link.  Please provide complete contact information and a detailed description of the issue you are experiencing.
  

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We are transitioning our forms to an online platform, AccessGov, that meets Americans with Disabilities Act (ADA) guidance. You will be able to submit some forms directly within the platform, while some may require you to download as a PDF and upload to another system. As of May 6th, 2026, all forms must be completed using the AccessGov system.  Please follow the instructions on each form to ensure proper submission.

License Information

Per Wis. Stat. § 145.06, no person may engage in or work at plumbing in the state unless licensed to do so by the Department.

Per Wis. Admin. Code § SPS 305.91, a person who as a licensed Master Plumber is responsible for the installation or modification of plumbing shall utilize the appropriate credentialed persons to install or modify plumbing.

Application Information

Getting Certified to Work with Lead Based Paint​

Training and certification are required for professionals who offer or conduct regulated lead-based paint activities in pre-1978 housing and child-occupied facilities. These activities include:

• Abatement of Lead Hazards​
  
• Lead Testing, Inspection, and Risk Assessment
• Most paint-disturbing renovation work (for example, replacing windows, scraping paint prior to re-painting)
• Post renovation and post-abatement clearance (including dust wipe sampling to measure lead dust left behind)

By getting certified and working safely, you protect your own and others' health, and show professional responsibility. For more information about certification, visit the Wisconsin Department of Health Services​ website.​​