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How Much Does Water Main Repair Cost?

Typical Range: $331 - $1,441

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Main Water Line Repair Cost

Repairing your home's main water service line costs $884 on average. You’ll typically spend between $331 and $1,441. You’ll typically pay $70 to $120 per hour plus materials for most water line repairs. Materials include new sections of pipe, valves and bushings.

This guide covers repairs to your home’s main water service line. You’ll see “water main” and “home service line” used interchangeably, but there’s a difference.

  • A water main runs under public property, usually next to or under a street. The city takes responsibility for repairs.
  • A home's “main” water service line connects your home to the water main. You’re usually responsible for repairs up to your property line.

On This Page:

  1. Water Main Leak Repair Cost Calculator
  2. Water Main Break Repair Cost
  3. Underground Water Leak Repair Cost
  4. DIY vs. Hiring a Pro
  5. FAQs

Water Main Leak Repair Cost Calculator

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National Average $884
Typical Range $331 - $1,441
Low End - High End $150 - $3,350

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Cost data is based on actual project costs as reported by 1,279 HomeAdvisor members in .

Water Main Break Repair Cost

Problem Average cost
Leaky Valve $150 - $700
Cracked $500 - $1,000
Broken Section $500 - $5,000
Corrosion Due to Aggressive Soil $600 - $5,000

Underground Water Leak Repair Cost

Repairing underground water list will cost $150 to $3,000. Simple, easy to access repairs cost $150 to $700. Anything difficult to get to or that requires replacing large pipe sections might hit up to $3,000.

You’ll have three main types of problems with common repairs:

  • Valve replacements
  • Pipe breaks
  • Corrosion fixes

Broken Underground Water Pipe Leak Repair Cost

Repairing broken underground pipes costs $100 to $200 per linear foot. Repairs consist of excavating the ground around the entire break. Then your pro cuts out the break and replaces it with new pipe. Forold or corroded pipes, plumbers might recommend replacing the entire length. Complete water main replacement costs $600 to $2,500 on average.

Cost to Repair Water Line to House Valves

Replacing a valve costs $150 to $300 depending on its location. Most lines don’t have buried valves. You’ll usually find these right outside your house in a valve box or exposed in a crawlspace or your basement.

Corroded Water Main Repair Costs

Corroded pipe repair costs $600 to $5,000. You’ll need to have all corrosion cut out and replaced. Typically, this means replacing the entire pipe. Corrosion often happens due to aggressive soil – acidic or resistive dirt. You’ll probably want to replace the dirt around the line, although it may become acidic again over time.

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DIY vs. Hiring a Pro

You technically can DIY repair underground leaks on your property. But if you damage city pipes or your home, it’ll cost more to fix than just hiring a pro. Professionals pull the right permits, have insured work and usually guarantee parts and labor. Before attempting a DIY fix, contact a local water liner repair service.


How do I know if my water main is damaged?

You’ll see a wet, swampy spot on your lawn if you have an underground leak. You may also notice reduced water pressure.

How can I protect my water main?

Scheduling an inspection every 2 to 5 years. Never dig in your yard without calling the dig line (811). Watch for soil erosion, low water pressure or wet spots in your yard.

How long does it take to fix a broken water main?

A broken water main takes 4 to 8 hours to repair. Large and complex issues might take longer, for example, if the break happens under a sidewalk.

How long do water main lines last?

Your main water service line lasts 50 years or longer in good condition. However, older metal pipes in acidic soil might corrode sooner.

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How do we get this data?

  1. Homeowners visit to find a top-rated pro to complete their home improvement project or repair.

  2. Once their projects are completed, the members log in to their accounts and complete a short cost survey.

  3. After compiling and organizing the data, we report it back to you.