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Plumbing & Repipe Cost in Maryland (2026)

Plumbing repipe in Maryland typically runs $5,800–$14,400 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 30-inch design frost line. Baltimore's 1900-1940 lead service line corridor served the city's row-house stock until 1969, leaving an estimated 11,000 confirmed and 35,000 suspected lead service lines that DPW is replacing under a court-supervised consent decree — and Eastern Shore brackish-water-table corrosion plus Western Maryland Appalachian acid-mine-drainage water create three distinctly different in-state water-treatment regimes per repipe scope.

State Maryland
Cities Covered 7
Typical whole-house 2-bath PEX repipe $5,800 – $14,400
BLS plumber wage $32.34/hr

Maryland water-quality & freeze drivers

  • IECC climate zone: 4A-5A — drives freeze-protection scope on supply lines
  • Frost-line trench depth: 30-inch design minimum for buried water service
  • Water hardness profile: Moderate (3.5–7 grains/gallon) — periodic appliance descaling recommended
  • 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: High — pre-1986 lead service line corridor under active LCRR replacement

Maryland licensing & permits

  • License status: Statewide license required
  • License board: Maryland State Board of Plumbing (Master Plumber / Journeyman / Apprentice) (official site)
  • Permit: county plumbing permit required; Bay Restoration Fund septic upgrades in Critical Area

How plumbing and repipe costs vary in Maryland

State-specific code or insurance rule: Maryland's Bay Restoration Fund Act (Md. Code Env. §9-1605.2) imposes a flush-tax on every sewer and septic customer that funds Best Available Technology nitrogen-removal septic upgrades for Chesapeake Bay Critical Area properties — homeowners within 1,000 feet of tidal waters must install BAT-certified systems on replacement, with the BRF subsidizing roughly half the $13,000-$22,000 cost.

Cities in Maryland

Compare plumbing and repipe pricing for 7 cities across Maryland.

Annapolis, MD

Compare local plumbing and repipe pricing in Annapolis.

Baltimore, MD

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Bowie, MD

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Frederick, MD

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Gaithersburg, MD

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Hagerstown, MD

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Rockville, MD

Compare local plumbing and repipe pricing in Rockville.

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Pricing ranges reflect Maryland market labor (BLS OEWS plumber mean $32.34/hr) and Woogoro regional cost modeling. For the most localized estimate, see your nearest city page above.