Plumbing Contractor Permit Requirements in Milwaukee, WI
Complete permit and license guide for starting a plumbing contractor in Milwaukee, Milwaukee County, Wisconsin.
Not legal advice. Requirements may change — always verify with your local government authority before applying. Last verified: .
Milwaukee / Milwaukee 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 Milwaukee Department of City Development — Business License
Milwaukee requires a City of Milwaukee Business License for most business types and an Occupancy Permit for any commercial space. This license must be renewed annually and displayed at your place of business.
Milwaukee County / Milwaukee 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.
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