Whole-Home Repipe: PEX vs Copper, and What It Costs

When plumbing ages, corrosion causes leaks or low water pressure. Repiping stops the issue permanently. However, choosing the wrong pipe system costs you twice, once for labor and again later for repairs.

In Texas, water chemistry varies, and soil conditions in places like Kingwood and Houston affect fixtures. Hire a licensed plumber who will obtain the required permits and coordinate the inspections. This guide breaks down the differences between PEX and copper pipe so you understand what drives the price and why cutting corners leads to costly rework.

Signs You Need a Whole-Home Repipe

Water that comes out rusty or has low pressure often means the pipes inside the wall are failing. You might notice that the cold water is hot or the hot water is remarkably cold. It can get worse, leading to leaks under the concrete slab that eat away at your floor. If you see stains on the walls or hear dripping behind drywall, the pipes are likely past their lifespan. We have seen many older homes in Kingwood and Humble where the original galvanized steel has rusted completely shut. When this happens, a full repipe is the only fix. This is a significant job because it involves opening up portions of the house, but it restores the water quality and flow to a new condition. You should not wait for the system to fail completely because a repair usually costs a small fraction of the cost of fixing the water damage that follows a catastrophic pipe burst.

Materials: PEX vs Copper

The main debate often comes down to PEX versus copper. Copper has been the gold standard for a long time and is very durable, but it is expensive. PEX, or cross-linked polyethylene, is a plastic tubing that is becoming much more common. In Texas, PEX is often the preferred choice for whole-house systems. It travels through walls and ceilings easily and resists freezing better than copper, though copper is still very heat resistant. The other benefit of PEX is that you do not need the special fittings for every joint, which means fewer chances for leaks down the road. However, copper will last decades longer than PEX. The choice usually depends on your budget and the layout of your house. A licensed plumber will look at your specific situation, like whether you have good attic space for running lines, and recommend the best material for your repipe.

The Process and Disruption

A whole-house repipe changes the look of your house during the project. The contractor will need to access every plumbing fixture, which usually means removing baseboards and cutting small holes in the drywall at some point. You should expect your water to be shut off for several hours or days depending on the size of the home. Plan your water use carefully because you will not be able to wash dishes or flush toilets during this time. For many homes in The Woodlands and Spring, the plastic PEX lines can be run inside the walls without removing all the drywall, which saves on cleanup time. Our team handles the mess by covering your floors and putting drop cloths on fixtures. We also clean up the debris when we are done and patch the drywall before we leave.

Permits and Inspections

In Texas, you cannot just decide to repipe a house without following the code. The City of Houston and surrounding municipalities generally require a permit for a repipe that changes the plumbing system. This ensures the work meets certain safety standards. A licensed plumber pulls this permit for you and is the one responsible for the work on the books. You cannot legally do this work yourself or hire an unlicensed handyman if it involves new pipe or a change in the water heater location. During the project, city inspectors will visit the site to check the connections and ensure the pipes are properly secured before the walls get closed up. We follow this process because the inspection is an independent check that the work was done to code.

What Drives the Cost

The final bill for a whole-house repipe can vary a lot from one house to the next. The price depends mainly on the size of the house and whether you have purchased access to the walls through other repairs. If the contractor has to cut open drywall to get to a pipe, that adds labor time and debris removal. The type of material you choose also affects the total price significantly since copper is more material intensive. The cost also reflects the complexity of the layout and the specific areas of the house you need to fix. When you get a quote, ask for it in writing and itemized so you can see the cost of the permit fee separately. You should look at the whole job as an investment in the house's value rather than just an expense.

Frequently asked questions