Plumbing Contractor Permit Requirements in Green Bay, WI
Complete permit and license guide for starting a plumbing contractor in Green Bay, Brown County, Wisconsin.
Not legal advice. Requirements may change — always verify with your local government authority before applying. Last verified: .
Green Bay / Brown 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 Green Bay Office of the City Clerk — Business License
Green Bay requires a Business License from the City Clerk for certain business types operating within city limits. This license must be renewed annually and displayed at your place of business.
Brown County / Green Bay 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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