How Much does Main Water Line Replacement Cost?

by | Apr 2, 2026

In Denver, Colorado, the cost for main water line replacement typically ranges from $3,000 to $15,000, depending on whether the project is a partial fix or a complete overhaul. Several factors influence the final price, including the length of the pipe, the replacement method used, and the specific materials selected.

On average, homeowners can expect the following costs based on the installation method:

  • Trenchless Replacement: Costs average approximately $100 per foot. This method is often more cost-efficient over time because it reduces labor and restoration expenses for landscaping and driveways.
  • Traditional Excavation: Costs average approximately $150 per foot, including the necessary backfill work. While the per-foot cost for materials may be lower, the extensive digging often increases labor and permit requirements.

Material choices also impact the budget. PEX is a more affordable modern option at about $2 to $5 per foot, while copper is a premium, durable choice ranging from $10 to $20 per foot. Because Denver is an urban setting with specific permitting and excavation hurdles, local labor rates and requirements may push total project costs 20% to 30% higher than national averages.

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