Plumbing Contractor Permit Requirements in Madison, WI
Complete permit and license guide for starting a plumbing contractor in Madison, Dane County, Wisconsin.
Not legal advice. Requirements may change — always verify with your local government authority before applying. Last verified: .
Madison / Dane County Requirements
3 requirementsWisconsin Department of Safety and Professional Services — Master Plumber License
Plumbing contractors in Wisconsin must be licensed as Master Plumbers by DSPS. Requires 5 years of apprenticeship and passing a state exam.
City of Madison Department of Planning and Community and Economic Development — Business License
Madison requires a Business License for regulated business types and a Certificate of Occupancy for any commercial space. This license must be renewed annually and displayed at your place of business.
Dane County / Madison Plumbing Permit (per project)
A separate permit must be pulled with the local building/plumbing department for each job. Inspections are required upon job completion.
Wisconsin State Requirements
1 requirementWisconsin Department of Revenue — Seller's Permit
Required for all businesses selling tangible personal property, certain services, or digital products in Wisconsin. Wisconsin charges a 5% state sales tax; local county taxes may apply (0.5%). Free to obtain from the Wisconsin DOR.
Federal Requirements
1 requirementEIN (Employer Identification Number)
Required if you have employees or operate as an LLC or corporation. Free from the IRS.
Official Sources
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