Home › Plumbing cities › New Hampshire

Plumbing & Repipe Cost in New Hampshire (2026)

Plumbing repipe in New Hampshire typically runs $5,400–$13,800 for a whole-house 2-bath PEX repipe, with Type-L copper the dominant retrofit choice and the International Plumbing Code (IPC) as the adopted enforcement basis. Buried service-line trench depth must clear the 48-inch design frost line. New Hampshire's bedrock-fracture aquifer system delivers naturally occurring arsenic, radon, and uranium concentrations exceeding EPA primary MCLs in roughly 20% of private wells across the Lakes Region and White Mountains — point-of-entry treatment with adsorptive media or reverse-osmosis is core to any well-served retrofit, and 48-inch frost depth in the North Country forces below-basement service-line trenching.

State New Hampshire
Cities Covered 3
Typical whole-house 2-bath PEX repipe $5,400 – $13,800
BLS plumber wage $30.14/hr

New Hampshire water-quality & freeze drivers

  • IECC climate zone: 5A-6A — drives freeze-protection scope on supply lines
  • Frost-line trench depth: 48-inch design minimum for buried water service
  • Water hardness profile: Soft (under 3.5 grains/gallon) — minimal scaling, no softener required
  • Dominant retrofit supply material: Type-L copper — dominant on retrofits in high-soft-water and pre-1990 housing stock
  • 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

New Hampshire licensing & permits

  • License status: Statewide license required
  • License board: New Hampshire Mechanical Licensing Board (Plumbers' Section) — Master / Journeyman (official site)
  • Permit: town plumbing permit required for repipe; subsurface system permit through DES

How plumbing and repipe costs vary in New Hampshire

State-specific code or insurance rule: New Hampshire RSA 153:27-a created the Mechanical Licensing Board as a unified body for plumbers, gas fitters, and refrigeration techs — and the Department of Environmental Services separately holds permitting authority over every subsurface wastewater disposal system under Env-Wq 1000, with a state-licensed Designer credential required to lay out any septic system before plumbing rough-in begins.

Cities in New Hampshire

Compare plumbing and repipe pricing for 3 cities across New Hampshire.

Concord, NH

Compare local plumbing and repipe pricing in Concord.

Manchester, NH

Compare local plumbing and repipe pricing in Manchester.

Nashua, NH

Compare local plumbing and repipe pricing in Nashua.

Got a quote? Check if it's fair.

Upload your estimate for an instant price and scope review tuned to New Hampshire labor and material rates.

Analyze your quote

More state guides

Pricing ranges reflect New Hampshire market labor (BLS OEWS plumber mean $30.14/hr) and Woogoro regional cost modeling. For the most localized estimate, see your nearest city page above.