If you are looking into replacing your home's water plumbing pipes, you will typically spend between $4,500 and $25,000 for PEX piping OR between $7,500 and $35,000 for copper piping, including labor and materials.
To narrow that down, re-piping a small 1-bathroom home with PEX costs about $4,500 - $7,500. For a 2.5 bath, 3 bedroom home, the cost will be $12,000-$18,000 or higher. Copper pipes will add approximately 25-35 percent to these figures.
The cost to re-pipe your house varies according to:
1. Size of your home and number of stories
2. Number of plumbing fixtures (sinks, toilets, tubs, showers, etc.) and water-consuming appliances
3. Accessibility of plumbing system
4. Whether you use copper or PEX pipes