Replumbing a home is a major investment, but it’s sometimes necessary to ensure safe, efficient water flow and to prevent costly water damage. If you’re researching the cost to replumb a house, understanding the factors involved can help you plan your budget and avoid surprises.
In this guide, we’ll break down average costs, influencing factors, material options, and ways to save money on your project.
What Does It Mean to Replumb a House?
Replumbing involves replacing all or most of the water supply pipes in a home. This may be required if your plumbing system is outdated, corroded, leaking frequently, or made from materials like galvanized steel that deteriorate over time.
Common reasons homeowners consider replumbing include:
- Recurring leaks
- Rust-colored water
- Low water pressure
- Old galvanized or polybutylene pipes
- Major renovation projects
Average Cost to Replumb a House
The cost to replumb a house typically ranges from $4,000 to $15,000, depending on the size of the home and the materials used. For larger or multi-story homes, costs can reach $20,000 or more.
Here’s a rough breakdown:
| Home Size | Average Cost |
| 1,000–1,500 sq ft | $4,000–$8,000 |
| 1,500–2,500 sq ft | $6,000–$12,000 |
| 2,500+ sq ft | $10,000–$20,000 |
Keep in mind that labor makes up a significant portion of the total price.
Factors That Affect the Cost
Several variables influence the final cost to replumb a house.
1. Size of the Home
Larger homes require more piping and labor, increasing overall expenses.
2. Pipe Material
The type of piping you choose plays a major role in pricing.
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- PEX (cross-linked polyethylene): Most affordable and flexible option
- Copper: Durable but more expensive
- CPVC: Mid-range option, commonly used in residential plumbing
3. Accessibility of Pipes
Homes with easy-to-access crawl spaces are cheaper to replumb than houses with slab foundations, where cutting into walls or flooring is required.
4. Local Labor Rates
Labor costs vary significantly by region. Urban areas generally charge more than rural locations.
5. Permits and Inspections
Most cities require permits for whole-house replumbing, which can add a few hundred dollars to the project.
Cost Breakdown by Material
PEX Replumbing
PEX is currently the most popular choice because it’s flexible and faster to install. Homes replumbed with PEX usually cost $4,000 to $10,000, depending on size.
Copper Replumbing
Copper piping is highly durable and long-lasting but can increase the cost to replumb a house by 20–40% compared to PEX. Expect costs between $8,000 and $20,000 for average-sized homes.
Additional Costs to Consider
Beyond the basic piping replacement, homeowners may face extra expenses such as:
- Drywall repair
- Painting
- Mold remediation (if leaks existed)
- Upgrading fixtures or water heaters
- Temporary accommodations (if water service is disrupted)
These additional costs can add $1,000 to $5,000 or more depending on the scope of repairs.
How Long Does It Take to Replumb a House?
Most whole-house replumbing projects take 3 to 7 days, depending on the home’s size and complexity. Larger homes or copper installations may take longer.
Is Replumbing Worth It?
While the upfront investment may seem high, replacing outdated pipes can:
- Increase home value
- Prevent water damage
- Improve water pressure
- Reduce future repair costs
- Provide peace of mind
For older homes, especially those built before the 1980s, replumbing can be a smart long-term investment.
Tips to Save Money on Replumbing
- Get at least three contractor quotes
- Consider PEX instead of copper
- Schedule work during other renovations
- Ask about warranties
- Check if homeowners insurance covers any damage
Final Thoughts
The cost to replumb a house depends on home size, pipe material, labor rates, and accessibility. On average, homeowners can expect to pay between $4,000 and $15,000, though large or complex homes may exceed that range.
If your plumbing system is aging or experiencing frequent issues, investing in a full replumbing project can save you money and stress in the long run. Always consult a licensed plumber to assess your specific situation and provide an accurate estimate.
