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Plumbing & Repipe Cost in Idaho (2026)

Plumbing repipe in Idaho typically runs $4,900–$12,200 for a whole-house 2-bath PEX repipe, with PEX-A or PEX-B cross-linked polyethylene the dominant retrofit choice and the Uniform Plumbing Code (UPC) as the adopted enforcement basis. Buried service-line trench depth must clear the 36-inch design frost line. Idaho Panhandle and Sawtooth-region geothermal hot-spring supply lines mineral-foul standard copper supply within 5 years where source temperatures exceed 110°F, and Sun Valley snow-load roofs combined with deep frost-line crawlspaces require continuous heat-tape on exposed riser stubs — Boise valley by contrast leans hard-water scale-control as its dominant retrofit driver.

State Idaho
Cities Covered 8
Typical whole-house 2-bath PEX repipe $4,900 – $12,200
BLS plumber wage $27.65/hr

Idaho water-quality & freeze drivers

  • IECC climate zone: 5B-6B — drives freeze-protection scope on supply lines
  • Frost-line trench depth: 36-inch design minimum for buried water service
  • Water hardness profile: Moderate (3.5–7 grains/gallon) — periodic appliance descaling recommended
  • Dominant retrofit supply material: PEX-A or PEX-B cross-linked polyethylene — dominant on whole-house repipes since 2005
  • Adopted plumbing code basis: Uniform Plumbing Code (UPC) — IAPMO model adopted statewide
  • Lead service line risk tier: Low — minimal pre-1986 lead service line installations

Idaho licensing & permits

  • License status: Statewide license required
  • License board: Idaho Division of Building Safety — Plumbing Program (Journeyman / Contractor) (official site)
  • Permit: DBS plumbing permit required statewide outside delegated cities

How plumbing and repipe costs vary in Idaho

State-specific code or insurance rule: Idaho Code §54-2606 routes all residential plumbing inspections through the state Division of Building Safety unless a city has been formally delegated permitting authority — making DBS plumbing inspectors the de-facto code official across most of rural Idaho rather than a county building department, a centralized model unusual in the Mountain West.

Cities in Idaho

Compare plumbing and repipe pricing for 8 cities across Idaho.

Boise City, ID

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Caldwell, ID

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Coeur Dalene, ID

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Idaho Falls, ID

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Meridian, ID

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Nampa, ID

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Pocatello, ID

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Twin Falls, ID

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Pricing ranges reflect Idaho market labor (BLS OEWS plumber mean $27.65/hr) and Woogoro regional cost modeling. For the most localized estimate, see your nearest city page above.