If you’re staring at a leaky pipe, rusty fixtures, or sky-high water bills, you might be wondering: How much to replace all plumbing in a house? It’s a big—and expensive—decision, but one that can prevent future disasters and boost your home’s value. Whether you’re renovating an older home or dealing with chronic plumbing issues, this guide breaks down real costs, hidden variables, and smart ways to plan your project without overspending.
What Does “Replacing All Plumbing” Actually Mean?
Replacing all plumbing in a house doesn’t just mean swapping out a few pipes. It typically involves:
- Replacing supply lines (hot and cold water)
- Replacing drain-waste-vent (DWV) pipes
- Upgrading fixtures (sinks, toilets, showers)
- Installing new water heater connections
- Updating main water shut-off valves and meter connections
Most homeowners consider a full repipe when their home has galvanized steel, polybutylene, or lead pipes—materials known to corrode, leak, or pose health risks. According to the U.S. Environmental Protection Agency , homes built before 1986 are more likely to contain lead service lines, making repiping not just a convenience but a safety necessity.
Average Cost to Replace All Plumbing in a House (2024)
The national average cost to replace all plumbing in a house ranges from $4,000 to $15,000, but it can climb as high as $25,000+ for large or complex homes.
Here’s a quick breakdown by home size:
| Small (1–2 beds) | $4,000 – $8,000 |
| Medium (3 beds) | $7,000 – $12,000 |
| Large (4+ beds) | $10,000 – $25,000+ |
Source: HomeAdvisor, Angi, and national contractor surveys (2024)
These estimates include labor, materials, permits, and minor drywall repairs—but not major structural work or full bathroom remodels.
6 Key Factors That Affect Plumbing Replacement Cost
1. Type of Pipes Used
- PEX (cross-linked polyethylene): $0.40–$2.00/ft – Flexible, freeze-resistant, and affordable. Most popular for modern repipes.
- Copper: $2.50–$8.00/ft – Durable and long-lasting but expensive and labor-intensive.
- CPVC: $0.50–$2.00/ft – Good for hot water, but less flexible than PEX.
- Galvanized steel (to be replaced): Often requires full removal due to corrosion.
💡 Pro Tip: PEX is now the go-to for most contractors—it’s 30–50% cheaper than copper and installs faster.
2. Home Size and Layout
A two-story home with plumbing on both floors costs more than a ranch-style home. Tight spaces (e.g., finished basements, slab foundations) increase labor time.
3. Accessibility
If pipes run behind finished walls, ceilings, or under concrete slabs, contractors must cut openings—adding $1,000–$5,000 for drywall repair and cleanup.
4. Permits and Local Codes
Most municipalities require permits for full repipes. Fees range from $100 to $500, but skipping them risks fines or failed inspections.
5. Geographic Location
Labor costs vary widely:
- Midwest: $4,000–$9,000
- West Coast: $8,000–$20,000+
- Northeast: $7,000–$18,000
6. Emergency vs. Planned Replacement
Emergency repipes (e.g., after a major leak) cost 20–40% more due to overtime labor and urgent scheduling.
PEX vs. Copper: Which Is Better for a Full Repipe?
| Cost | Lower | Higher |
| Installation Time | Faster (1–3 days) | Slower (3–7 days) |
| Lifespan | 40–50 years | 50–70+ years |
| Freeze Resistance | Excellent | Poor (can burst) |
| Eco-Friendliness | Recyclable but petroleum-based | Highly recyclable |
| Resale Value | Neutral | Slight premium |
While copper has a longer lifespan, PEX dominates 80% of new repipe jobs (per the Plumbing-Heating-Cooling Contractors Association) due to speed, cost, and reliability.
Step-by-Step: What to Expect During a Full Repipe
- Inspection & Quote
A licensed plumber inspects your system (often with a camera) and provides a line-item estimate. - Permit Application
Your contractor files for permits—don’t skip this step. - Water Shut-Off
The main water supply is turned off. Plan for 2–5 days without running water.
- Pipe Removal & Installation
Old pipes are cut out; new PEX or copper lines are run. Expect wall cuts every 4–6 feet. - Pressure Testing
The system is pressurized to check for leaks (required by code). - Inspection & Drywall Repair
City inspector approves the work. Contractor patches walls or coordinates with a drywall pro. - Reconnect Fixtures
Sinks, toilets, and appliances are reinstalled and tested.
⏱️ Timeline: Most full repipes take 3–7 days for a 2,000 sq ft home.
Hidden Costs to Watch For
- Mold remediation: If old leaks caused hidden mold, add $500–$5,000.
- Upgraded water heater: Older units may not match new pipe specs.
- Fixture upgrades: Basic faucets cost $50; designer models can hit $500+ each.
- Temporary relocation: Some families rent a hotel during the no-water period.
Always ask for a detailed written estimate that separates materials, labor, and contingencies.
When Should You Replace All Your Plumbing?
Consider a full repipe if your home has:
- Polybutylene pipes (gray or blue plastic, common 1978–1995)—prone to sudden failure.
- Galvanized steel pipes over 50 years old—likely corroded inside.
- Frequent leaks, low water pressure, or discolored water.
- Lead pipes (common in pre-1986 homes)—a serious health hazard.
The EPA notes that no level of lead in drinking water is safe, especially for children.
FAQ Section
Q1: Can I replace my home’s plumbing myself?
A: Technically yes, but not recommended. Plumbing requires permits, pressure testing, and code compliance. DIY mistakes can cause floods, mold, or failed inspections. Plus, most homeowner’s insurance won’t cover DIY plumbing damage.
Q2: How long does a full repipe last?
A: PEX lasts 40–50 years; copper can last 70+ years with proper maintenance. Both far outlast old galvanized or polybutylene systems.
Q3: Will repiping increase my home’s value?
A: Yes—especially in older homes. Updated plumbing reduces buyer concerns, speeds up sales, and can justify a 2–5% price premium, according to real estate appraisers.
Q4: Do I need to move out during a repipe?
A: Not always, but it’s uncomfortable. You’ll have no running water for several days. Many families stay with relatives or book a short Airbnb.
Q5: Are there financing options for plumbing replacement?
A: Yes. Many contractors offer payment plans. You can also use a home equity loan, HELOC, or personal loan. Some utility companies offer rebates for water-efficient upgrades.
Q6: How do I choose a reliable plumber?
A: Look for:
- Licensed, bonded, and insured contractors
- 5+ years of repipe experience
- Itemized written estimates
- Reviews on Google, BBB, or Angi
- Warranty on labor (minimum 1 year)
Conclusion
Knowing how much to replace all plumbing in a house empowers you to make smart, safe, and cost-effective decisions. While the upfront cost is significant, a full repipe prevents costly emergencies, improves water quality, and adds long-term value to your home.
If you’re facing aging pipes or recurring leaks, don’t wait for a disaster—get 2–3 quotes from licensed plumbers today.
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