If you’re dealing with rusty pipes, low water pressure, or frequent leaks, you might be asking yourself: How much does it cost to change plumbing? You’re not alone—many U.S. homeowners face this costly but often necessary decision. Whether you’re renovating an old home or upgrading after repeated plumbing failures, understanding the real costs and variables can help you budget wisely and avoid surprises.
What Does “Changing Plumbing” Actually Mean?
Before diving into costs, it’s important to clarify what “changing plumbing” entails. This phrase can refer to anything from replacing a single pipe under the sink to a full whole-house repipe, where every water line is replaced. Common types include:
Partial repipe: Fixing specific problem areas (e.g., galvanized pipes in the kitchen).
Full repipe: Replacing all supply lines (hot and cold water) throughout the house.
Drain-waste-vent (DWV) replacement: Less common, but needed if sewer lines are cracked or corroded.
Most cost estimates focus on water supply lines, which are typically made of copper, PEX (cross-linked polyethylene), or CPVC.
Average Cost to Change Plumbing in 2025
According to HomeAdvisor and Angi (formerly Angie’s List), the national average cost to repipe a house in 2025 ranges from $4,000 to $15,000. However, this varies widely based on several key factors:
1,000 sq ft
$2,500 – $5,000
$6,000 – $10,000
2,000 sq ft
$5,000 – $8,000
$10,000 – $15,000
3,000+ sq ft
$8,000 – $12,000
$15,000 – $25,000+
💡 Expert Insight: “PEX has become the go-to for most repipes due to its flexibility, lower cost, and resistance to corrosion,” says Michael R., a licensed master plumber with 18 years of experience in Texas. “Copper is still used in some high-end builds, but it’s nearly twice the price.”
5 Key Factors That Affect Plumbing Replacement Costs
1. Type of Pipe Material
PEX: $0.40–$2.00 per linear foot (installed). Durable, freeze-resistant, and easy to install.
Copper: $2.50–$8.00 per linear foot (installed). Long-lasting but expensive and labor-intensive.
CPVC: $0.50–$2.00 per foot. Cheaper than copper but less flexible than PEX.
2. Home Size and Layout
Larger homes require more piping. Multi-story homes increase labor time (walls, floors, ceilings must be accessed).
3. Accessibility
If pipes run behind finished walls, floors, or in tight crawl spaces, demolition and repair add $1,000–$5,000+ to the total. Open-wall installations (e.g., during a kitchen remodel) cost far less.
4. Permits and Local Codes
Most cities require plumbing permits ($50–$500). Repipes must comply with local building codes—some areas restrict certain materials like PEX in specific applications.
5. Labor Rates by Region
Midwest: $65–$85/hour
West Coast: $95–$130/hour
Southeast: $60–$75/hour
📌 Tip: Always get 3+ quotes. Labor can vary by 30–50% between contractors in the same city.
PEX vs. Copper: Cost Comparison & Long-Term Value
Upfront Cost
Low
High
Lifespan
40–50 years
50–70+ years
Corrosion Resistance
Excellent
Good, but can develop pinhole leaks
Freeze Resistance
High (expands without bursting)
Low (can crack when frozen)
Installation Speed
Fast (fewer fittings)
Slow (soldering required)
While copper has a longer lifespan, PEX offers better value for most homeowners—especially in colder climates. The U.S. Department of Energy notes that PEX reduces heat loss in hot water lines, improving efficiency.
Inspection & Quote A plumber inspects your system (often using a camera) and provides a detailed estimate.
Permit Application Your contractor files for permits—don’t skip this; unpermitted work can void insurance claims.
Shut Off Water & Drain System Water is turned off, and pipes are drained completely.
Remove Old Pipes Sections of drywall or flooring may be cut open (typically 12”–18” access holes).
Install New Pipes PEX lines are run from the main shut-off to each fixture. Manifolds are often used for individual control.
Pressure Test System is pressurized for 15–30 minutes to check for leaks (industry standard: 80–100 PSI).
Patch & Restore Drywall, paint, and flooring are repaired. Reputable contractors include this in their quote.
Final Inspection City inspector verifies code compliance before restoring water.
⏱️ Timeline: Most whole-house repipes take 2–5 days, depending on complexity.
Hidden Costs to Watch Out For
Water damage repair: If old leaks caused rot or mold, remediation can add $2,000–$10,000.
Fixture upgrades: Faucets or shower valves may need replacement if incompatible with new lines.
Emergency pricing: Avoid “24/7 plumbers” for non-emergencies—they often charge 2–3x standard rates.
When Should You Replace Your Home’s Plumbing?
Consider a repipe if:
Your home was built before 1970 (likely has galvanized steel or polybutylene pipes).
You have frequent leaks or discolored water.
Water pressure has dropped significantly.
You’re planning a major remodel (ideal time to upgrade).
🛠️ Pro Tip: Polybutylene pipes (gray or blue plastic, common 1978–1995) are prone to failure and should be replaced immediately—even if they’re not leaking yet.
FAQ Section
Q: How much does it cost to repipe just the kitchen or bathroom?
A: Expect $500–$2,500 per room. Kitchens often cost more due to longer pipe runs and extra fixtures (dishwasher, fridge water line).
Q: Can I repipe my house myself to save money?
A: Technically yes, but not recommended. Repiping requires soldering (copper), crimping tools (PEX), permits, and code knowledge. Mistakes can lead to leaks, mold, or failed inspections. DIY may void home insurance.
Q: Does homeowners insurance cover plumbing replacement?
A: No, unless sudden damage (like a burst pipe) caused it. Routine upgrades or aging pipe replacement are considered maintenance and not covered.
Q: How long does new plumbing last?
A: PEX lasts 40–50 years; copper can last 70+ years with proper water chemistry. Always use a water softener if you have hard water—it extends pipe life significantly.
Q: Is PEX safe for drinking water?
A: Yes. PEX is certified by NSF/ANSI Standard 61 for potable water. It does not leach harmful chemicals when installed correctly.
Q: Will changing my plumbing increase my home’s value?
A: Indirectly, yes. Updated plumbing makes your home more attractive to buyers, reduces risk of insurance denial, and prevents costly emergency repairs post-sale.
Conclusion
Knowing how much does it cost to change plumbing isn’t just about getting a number—it’s about protecting your biggest investment: your home. With average costs between $4,000 and $15,000, a repipe is significant, but it eliminates recurring leaks, improves water quality, and boosts efficiency. Opting for PEX in most cases offers the best balance of cost, durability, and ease of installation.
If you’re on the fence, get a professional inspection—it could save you thousands in future water damage.
Found this guide helpful? Share it with a friend or on social media! 💧🔧 #PlumbingTips #HomeRenovation #SaveOnRepairs
Leave a Reply