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Plumbing & Repipe Cost in Louisiana (2026)

Plumbing repipe in Louisiana typically runs $4,400–$11,200 for a whole-house 2-bath PEX repipe, with CPVC chlorinated PVC the dominant retrofit choice and a state-specific plumbing code as the adopted enforcement basis. Buried service-line trench depth must clear the 6-inch design frost line. South Louisiana parishes from Plaquemines through Cameron sit at or below sea level with water tables 2-4 feet below grade, requiring residential lift-station sewer pumps on virtually every new build, and hurricane storm-surge backflow through fixture drains has driven near-universal adoption of automatic backwater valves on coastal-parish homes — a regional standard well beyond the parish code minimum.

State Louisiana
Cities Covered 9
Typical whole-house 2-bath PEX repipe $4,400 – $11,200
BLS plumber wage $26.84/hr

Louisiana water-quality & freeze drivers

  • IECC climate zone: 2A-3A — drives freeze-protection scope on supply lines
  • Frost-line trench depth: 6-inch design minimum for buried water service
  • Water hardness profile: Moderate (3.5–7 grains/gallon) — periodic appliance descaling recommended
  • Dominant retrofit supply material: CPVC chlorinated PVC — dominant retrofit choice in slab-on-grade Sun-Belt construction
  • Adopted plumbing code basis: State-specific plumbing code (deviates from both UPC and IPC)
  • Lead service line risk tier: Moderate — partial pre-1986 service line inventory under utility review

Louisiana licensing & permits

  • License status: Statewide license required
  • License board: Louisiana State Plumbing Board (Master Plumber / Journeyman / Apprentice) (official site)
  • Permit: parish or city plumbing permit required for repipe and water-heater work

How plumbing and repipe costs vary in Louisiana

State-specific code or insurance rule: Louisiana operates under the Louisiana State Plumbing Code (LAC Title 51, Part XIV) administered by the Louisiana State Plumbing Board — a state-specific code rather than IPC or UPC adoption, with Civil Code interactions unique to Louisiana's Napoleonic legal heritage that make the Master Plumber's seal a public-safety credential carrying personal liability beyond the typical common-law tort exposure of other states.

Cities in Louisiana

Compare plumbing and repipe pricing for 9 cities across Louisiana.

Alexandria, LA

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Baton Rouge, LA

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Bossier City, LA

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Kenner, LA

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Lafayette, LA

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Lake Charles, LA

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Monroe, LA

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New Orleans, LA

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Shreveport, LA

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Pricing ranges reflect Louisiana market labor (BLS OEWS plumber mean $26.84/hr) and Woogoro regional cost modeling. For the most localized estimate, see your nearest city page above.