Do I need a plumbing permit in Louisiana?

In Louisiana it depends on the size of the job. Permits are issued locally, so the answer comes from your Louisiana city or county rather than a single statewide rule. Of the 2 Louisiana jurisdictions we have verified for plumbing work, 1 requires a permit outright, 1 depends on the size or scope of the job, and 0 require none.

Is there a plumbing permit exemption in Louisiana?

1 of the 2 Louisiana jurisdictions we cover sets a threshold rather than a flat rule, so the same job can be exempt in one Louisiana county and permitted in the next. The table above lists each Louisiana jurisdiction's published threshold in its own words, with the source and the date we verified it.

Louisiana

Do you need a plumbing permit in Louisiana?

By Mario Bailey Last checked 16 Aug 2026

Always required: 1; of 2 jurisdictions
Conditional: 1; depends on size or scope
Not required: 0; exempt outright

Plumbing Permit rules nationwide, beyond Louisiana.

A plumber tightens a fitting on water supply pipes

Requirements and size thresholds for plumbing permits vary by locality. The table below compares what each Louisiana county or city requires. Always confirm with the local office before starting.

Comparing states? See plumbing permit rules across every locality we cover.

The application steps and inspection sequence for plumbing permits come from the model code rather than from Louisiana law, so they read the same wherever you build. We keep that walkthrough in one place: how a plumbing permit application and its inspections work, start to finish. What changes between Louisiana jurisdictions is below: who requires a permit, what they charge, and which office you file with.

Swipe sideways to see thresholds and confidence.

Locality	Permit required?	Typical threshold	Confidence
Baton Rouge	Conditional	Before replacing any water line, vent, drain or sewer line, any plumbing valve or shut...	Confirmed on official page
New Orleans	Yes	Any size	Confirmed on official page
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Common questions about plumbing permits in Louisiana

Do I need a plumbing permit in Louisiana?: In Louisiana it depends on the size of the job. Permits are issued locally, so the answer comes from your Louisiana city or county rather than a single statewide rule. Of the 2 Louisiana jurisdictions we have verified for plumbing work, 1 requires a permit outright, 1 depends on the size or scope of the job, and 0 require none.
Is there a plumbing permit exemption in Louisiana?: 1 of the 2 Louisiana jurisdictions we cover sets a threshold rather than a flat rule, so the same job can be exempt in one Louisiana county and permitted in the next. The table above lists each Louisiana jurisdiction's published threshold in its own words, with the source and the date we verified it.

Do you need a plumbing permit in Louisiana?

Common questions about plumbing permits in Louisiana

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