Plumbing & Repipe Cost in Tennessee (2026)

Plumbing repipe in Tennessee typically runs $4,500–$11,500 for a whole-house 2-bath PEX repipe, with PEX-A or PEX-B cross-linked polyethylene the dominant retrofit choice and the International Plumbing Code (IPC) as the adopted enforcement basis. Buried service-line trench depth must clear the 18-inch design frost line. Tennessee's Cumberland Plateau and the karst limestone of Middle Tennessee from Nashville through Murfreesboro and Lewisburg sit atop sinkhole-prone bedrock that drains surface contamination into private wells within hours, and Smoky Mountain east Tennessee crawlspaces drop to design frost-line depths of 18-24 inches forcing exposed-riser heat-tape on every retrofit above 2,000 ft elevation.

State Tennessee
Cities Covered 17
Typical whole-house 2-bath PEX repipe $4,500 – $11,500
BLS plumber wage $25.62/hr

Tennessee water-quality & freeze drivers

  • IECC climate zone: 3A-4A — drives freeze-protection scope on supply lines
  • Frost-line trench depth: 18-inch design minimum for buried water service
  • Water hardness profile: Hard (7–10.5 grains/gallon) — softener cost-effective on tankless and water-heater retrofits
  • Dominant retrofit supply material: PEX-A or PEX-B cross-linked polyethylene — dominant on whole-house repipes since 2005
  • Adopted plumbing code basis: International Plumbing Code (IPC) — ICC model adopted statewide
  • Lead service line risk tier: Moderate — partial pre-1986 service line inventory under utility review

Tennessee licensing & permits

  • License status: Statewide license required
  • License board: Tennessee Board for Licensing Contractors — CMC-A (Plumbing) or LMC (Limited Mechanical Contractor) (official site)
  • Permit: city or county plumbing permit; rural OSSF through Department of Environment & Conservation

How plumbing and repipe costs vary in Tennessee

State-specific code or insurance rule: Tennessee Code §62-6-102 sets the Board for Licensing Contractors threshold at $25,000 per project for residential work — significantly above the $5,000-$10,000 thresholds in most Southeastern states — meaning small-scope plumbing repairs and individual fixture replacements typically fall outside state licensing entirely and rely on county-level Limited Licensed Plumber credentials issued through TDCI.

Cities in Tennessee

Compare plumbing and repipe pricing for 17 cities across Tennessee.

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