Stop Losing Money on Whole-Home Repipes
Ditch the guesswork for a 4-step estimating system that protects your plumbing business’s profit on every repipe job.
By MyBizNerd Team · Published
Key Takeaways
- Measure every linear foot of PEX or copper to avoid the 15% material waste trap that eats into your gross margins.
- Factor in at least two hours of wall repair coordination per job to account for the time spent managing drywall subs or cleanup.
- Review the current BLS wage data for plumbers to ensure your billable labor rate covers both regional overhead and local competition.
- Verify all local plumbing codes and permit fees at your municipal building department to prevent $500+ unbudgeted site visit costs.
How do you quote a whole-home repipe without getting hammered by hidden costs?
You must calculate total linear footage, access point counts, and exact material waste percentages before handing over a final number. Relying on a square-footage estimate alone leads to underpricing complex multi-story homes or older builds with galvanized pipes behind lath and plaster.
Say you spend $12,000 a month on materials and your crew is quoting a standard 2-bathroom ranch.
If you eyeball the copper needs and miss the actual run by 40 feet, you aren't just out the $250 in pipe. You're losing the 35% markup you needed to cover the truck insurance and the office manager's salary. A single missed manifold or a forgotten pressure-reducing valve can turn a $9,000 win into a $7,500 break-even disaster.
The Four Pillars of the Repipe Quote
A profitable quote isn't a guess. It's a systematic buildup of these specific costs:
- Linear Footage plus 15%: Measure the main line and every branch. Add 15% for off-cuts and mistakes. If you're using PEX, account for every bend support and crimp ring.
- Fixture Count and Terminations: Count every stop and supply (plus riser) line. A house with three outdoor hose bibs costs significantly more in labor and parts than one with just one.
- The Access Penalty: Does the home have a crawlspace with 18 inches of clearance or a wide-open basement? Tight quarters add 20% to your labor time. Mention this clearly in your internal estimate notes.
- Permits and Inspections: Never guess these. Check your state or local building office. For example, some jurisdictions require specific OSHA-compliant trenching if you're replacing the service line from the meter to the house.
Labor is Where Plumbers Go Broke
Most businesses fail to price the "invisible" hours. You might have two guys on the torch or the expansion tool for eight hours. But did you bill for the two hours they spent covering the customer's furniture in plastic? Did you bill for the time spent walking the homeowner through the shut-off valves?
If your local market rate for a journeyman is $45 an hour, but your fully burdened cost (taxes, workers' comp, and benefits) is $72, quoting at $100 an hour leaves you with almost nothing after overhead. Use a flat-rate price that assumes the worst-case scenario for pipe removal. It's easier to explain a high quality quote than a mid-job change order.
Common Estimating Mistakes
| Item | The Mistake | The Fix |
|---|---|---|
| Drywall | Assuming the homeowner will handle it | Quote a specific "cut and patch" fee or exclude it in bold text |
| Valves | Reusing old shut-offs to save money | Replace every single valve; old valves fail after being disturbed |
| Water Quality | Ignoring high acidity or hard water | Test the water first; this determines if you use PEX-A, B, or Copper |
| Permits | Forgetting the administrative time | Charge for the hour your office spent filing the paperwork |
Should you offer multiple material options?
I generally suggest giving the customer two choices: the "Gold Standard" (typically Copper or high-end PEX with a long warranty) and the "Standard" option. Don't give them four choices. Too much data leads to a confused customer who won't sign the contract. Focus on the value of the new system, like better water pressure and zero leak anxiety.
When was the last time you sat down and checked if your material markup actually covered your rising fuel and insurance costs?
Related free tool
Break-Even Calculator — Find the number of customers you need to stop losing money. Free, no signup to start.
📋 Disclaimer
This article is for informational purposes only and does not constitute legal, tax, financial, or professional advice. Laws and regulations change frequently, and the information presented may not reflect the most current legal developments. Always consult with a qualified professional (CPA, attorney, financial advisor) before making business decisions based on this content. MyBizNerd may receive compensation through affiliate links, but this never influences our recommendations.