Plumbing Contractor Permit Requirements in Baton Rouge, LA
Complete permit and license guide for starting a plumbing contractor in Baton Rouge, East Baton Rouge Parish, Louisiana.
Not legal advice. Requirements may change — always verify with your local government authority before applying. This guide was compiled from public and official sources (last updated ) and has not yet been independently source-verified — confirm each requirement before acting on it.
Federal — start here
1 stopEIN (Employer Identification Number)
Required if you have employees or operate as an LLC or corporation. Free from the IRS.
Official government sourceFreeImmediate (online application)
Free
Immediate (online application)
State of Louisiana
1 stopLouisiana Department of Revenue — Sales Tax Registration
Required for all businesses selling taxable goods or services in Louisiana. Louisiana's state sales tax rate is 4.45%. Louisiana has a complex tax structure with local parish sales taxes that can bring the total rate to 8–12%. Register with the Louisiana Department of Revenue and separately with each applicable parish.
Official government sourceFree1–5 business days (online)
Free
1–5 business days (online)
City of Baton Rouge / East Baton Rouge Parish
3 stopsLouisiana State Plumbing Board — Master Plumber License
Plumbing contractors in Louisiana must hold a Master Plumber License from the Louisiana State Plumbing Board. Requires journeyman experience and passing a state board exam.
$150–$300 (initial)4–8 weeks
$150–$300 (initial)
4–8 weeks
City of Baton Rouge / Parish of East Baton Rouge Department of Finance — Business License
Baton Rouge requires an Occupational License from the Parish for all businesses. Certain regulated businesses require additional permits from the Department of Development. This license must be renewed annually and displayed at your place of business.
Official government source$50–$500/year depending on business type and gross revenues1–3 weeks
$50–$500/year depending on business type and gross revenues
1–3 weeks
East Baton Rouge Parish / Baton Rouge 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.
Official government source$50–$300 per project1–5 business days
$50–$300 per project
1–5 business days
Terminus
Open for business — est. $400–$1,200 · 4–10 weeks to obtain all licenses
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Official Sources
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