Cost to Replumb a House in Texas

Replumbing — also called repiping — means replacing all of the water supply lines, drain lines, or both throughout your entire home. It is a full-system replacement, not a spot repair or patch job on a single pipe.

In most cases, replumbing involves removing old pipe materials that have reached the end of their useful life and replacing them with modern alternatives. For supply lines, the two most common replacement materials are PEX (cross-linked polyethylene) and copper. PEX has become the standard in Texas due to its flexibility, lower cost, and resistance to corrosion. Copper is more durable and has a longer track record but costs significantly more.

For drain lines, the standard replacement material is PVC (polyvinyl chloride) or ABS (acrylonitrile butadiene styrene). These plastic pipes resist corrosion and root intrusion far better than the cast iron drain lines found in many older DFW homes.

Replumbing is different from a spot repair in scope and purpose. A spot repair fixes one leak or replaces one section of pipe. Replumbing replaces the entire system — every supply line running to every fixture, or every drain line carrying wastewater out of the home. The goal is to eliminate the root cause of recurring plumbing failures rather than chasing individual leaks.

In Dallas-Fort Worth, replumbing often involves slab work. Many DFW homes are built on concrete slab foundations, with water supply lines and sometimes drain lines running underneath or through the slab. When these under-slab pipes fail, the plumber may need to cut through the concrete, tunnel underneath the foundation, or reroute new lines through the attic and walls to bypass the slab entirely. Each approach has different costs and trade-offs, which we cover in the pricing section below.

The plumbing problems you encounter in a DFW home depend largely on when the home was built and what pipe materials were used. Here are the most common issues we see:

Cast Iron Drain Lines

Homes built before 1980 in the Dallas-Fort Worth area commonly have cast iron drain lines. While cast iron was considered a premium material at the time, it has a lifespan of roughly 50 to 75 years. That means many DFW homes are now reaching or have already passed the end of their cast iron's useful life.

As cast iron corrodes, it develops cracks, pitting, and thin spots that allow tree root intrusion. The pipes can also develop bellying — sagging sections where waste accumulates and causes recurring backups. Signs of failing cast iron include slow drains throughout the house, sewage odors, frequent backups, and visible rust-colored stains on exposed pipes in the crawlspace or basement.

Replacing cast iron drain lines is one of the most expensive plumbing projects because the pipes often run under the slab foundation, requiring excavation or tunneling to access.

Polybutylene (Poly-B) Supply Lines

Polybutylene pipes were installed in homes built between approximately 1978 and 1995. At the time, poly-B was marketed as a cheaper, easier-to-install alternative to copper. The problem: polybutylene reacts with oxidants in public water supplies (like chlorine), causing the pipes to become brittle, flake, and eventually crack from the inside out.

You can identify polybutylene pipes by their gray, flexible appearance and the typical blue or gray fittings at connection points. They are most commonly found running from the water meter to the home and throughout the supply system inside walls and under slabs.

The biggest issue with poly-B beyond the leak risk is insurability. Most major insurance carriers in Texas — including State Farm, Allstate, and Farmers — will not write or renew a homeowner's policy on a property with polybutylene supply lines. Without insurance, the home is effectively unmarketable to financed buyers, since lenders require active insurance. This creates a major problem when trying to sell.

Galvanized Steel Pipes

Homes built before 1970 may have galvanized steel supply lines. These pipes were coated in zinc to prevent corrosion, but over time the zinc coating wears away and the steel corrodes from the inside. The corrosion builds up inside the pipe, restricting water flow and causing progressively lower water pressure throughout the home.

In advanced stages, galvanized pipes can contaminate your water supply with rust, giving the water a brownish or yellowish tint. If you notice discolored water when you first turn on a faucet that has been off for a while, galvanized corrosion is a likely cause.

CPVC Supply Lines

CPVC (chlorinated polyvinyl chloride) is a rigid plastic pipe used in some Texas homes as an alternative to copper. While generally reliable, CPVC can become brittle over time, especially when exposed to certain chemicals, UV light, or high temperatures. Brittle CPVC pipes can crack at fittings or when subjected to even minor stress, leading to sudden leaks inside walls.

Slab Leaks

A slab leak occurs when water supply lines running underneath your home's concrete slab foundation develop a leak. In Dallas-Fort Worth, slab leaks are extremely common due to the region's expansive clay soil. As the soil expands and contracts with moisture changes, it puts stress on the pipes, causing them to shift, rub against the concrete or gravel, and eventually develop pinhole leaks or cracks.

Chemical reactions between the copper pipes and the minerals in the soil or water can also accelerate corrosion. Signs of a slab leak include unexplained spikes in your water bill, the sound of running water when no fixtures are on, warm or hot spots on the floor, and cracks in the foundation or interior walls. Left unaddressed, slab leaks can cause significant foundation damage.

Replumbing costs in Texas vary significantly based on home size, pipe material, number of fixtures, and whether the work involves the slab foundation. Below is a detailed breakdown of typical costs for a 1,500 to 2,500 square foot home in the Dallas-Fort Worth area as of 2026.

Factors That Affect Your Cost

The numbers above are ranges for a reason. Several factors push your actual cost higher or lower:

• Home size and number of bathrooms. A 3-bedroom, 2-bath home is straightforward. A 4,000 square foot home with 4 bathrooms, a kitchen island, and a utility room has significantly more pipe runs.
• Single-story vs. two-story. Two-story homes require more vertical pipe runs and additional labor to access pipes in upper-floor walls.
• Foundation type. Slab foundations are more expensive to work with because pipes are embedded in or run beneath concrete. Pier-and-beam foundations offer easier access to pipes underneath the home, which can reduce labor costs significantly.
• Existing pipe material. Removing cast iron is more labor-intensive than removing polybutylene or galvanized steel. Cast iron is heavy and may require cutting through concrete.
• Accessibility. Pipes running through finished walls, tight crawlspaces, or beneath tile flooring add cost due to demolition and restoration work.
• Permit and inspection requirements. Most Texas cities require permits for replumbing work. Inspections add time and modest fees but ensure the work meets code.

When adding up the total cost, do not forget the ancillary expenses. Drywall repair, flooring replacement, repainting, and cleanup after the plumbing work is done can add $1,000 to $5,000 or more to your total project cost. Many homeowners budget for the plumbing but are surprised by the restoration bill that follows.

Plumbing failures rarely happen all at once. Instead, they show up as a pattern of smaller symptoms that gradually worsen over time. Here are the warning signs that your home may need a full replumb rather than another spot repair:

• Low water pressure throughout the house. If pressure has gradually declined at multiple fixtures — not just one faucet — it usually points to corroded or restricted supply lines rather than a localized issue.
• Discolored water. Rust-colored or brownish water when you turn on a tap — especially after it has been off for a few hours — indicates corroding galvanized or iron pipes.
• Frequent leaks in different locations. One leak is a repair. Three leaks in two years in different parts of the house is a system that is failing.
• Water damage or wet spots. Stains on walls, ceilings, or around the base of the slab can indicate active leaks behind walls or under the foundation.
• Increasing water bills. A sudden or gradual increase in your water bill without a change in usage is one of the most common signs of a hidden leak — often under the slab.
• Visible corrosion on exposed pipes. Check under sinks, in the garage, and in the attic. Green patina on copper, orange rust on galvanized, or flaking on any pipe material signals deterioration.
• Insurance company requires a replumb. If your insurer has flagged polybutylene or other failing pipe materials and given you a deadline to replace them, that is a clear signal the system needs attention.
• Home inspection flags pipe material. If a buyer's inspector or your own pre-listing inspector identifies polybutylene, deteriorating galvanized, or failing cast iron, replumbing is usually the recommended remedy.

If you see two or more of these signs in a DFW home built before 1990, a full replumb is worth evaluating. Get quotes from at least two licensed plumbers before making a decision.

This is the question most homeowners are really asking when they research replumbing costs. If you are planning to sell, does it make financial sense to invest $8,000 to $15,000 or more in new plumbing first?

The answer depends on your situation, but here is the honest math:

The Case for Replumbing Before Selling

If your home has polybutylene pipes or failing cast iron, the plumbing is not just a repair issue — it is a marketability issue. Homes with poly-B supply lines are often uninsurable through standard carriers, which means most buyers who need a mortgage cannot purchase the home. Their lender will require active homeowner's insurance as a condition of financing.

By replumbing, you open up your home to the full buyer pool — FHA, VA, conventional, and cash buyers. This expanded pool creates more competition and typically pushes the sale price up. In many DFW markets, replumbing a poly-B home can increase the sale price by $15,000 to $25,000 or more, well exceeding the $4,000 to $10,000 cost of a PEX repipe.

The Case Against Replumbing Before Selling

Replumbing is not a quick project. The plumbing work itself takes 2 to 5 days for a typical home, but that is only part of the story. If walls need to be opened or the slab needs to be accessed, you are looking at an additional 1 to 2 weeks of drywall, flooring, and paint repair. During this time, the home may not be livable.

There is also the risk of discovering additional issues once walls and floors are opened up. It is not uncommon for a replumb project to uncover mold, termite damage, or additional structural issues that add to the scope and cost.

And then there is the hassle factor. Coordinating plumbers, drywall contractors, painters, and flooring installers takes time and energy. If you are already dealing with a difficult situation — facing foreclosure, going through a divorce, or managing an inherited property from out of state — the last thing you need is a multi-week construction project.

The Bottom Line

If you have the time, money, and bandwidth to manage a replumb and the subsequent repairs, the numbers usually favor doing the work before listing. But if speed, simplicity, or financial constraints are driving your decision, selling to a cash buyer who will handle the plumbing themselves can be the better path. You avoid the upfront cost, the project risk, and the weeks of construction — and you close on your timeline.

If your DFW home has significant plumbing issues — whether it is polybutylene supply lines, failing cast iron drains, recurring slab leaks, or a combination — you have three realistic options for selling:

Option 1: Replumb and List on the Market

This approach gets you the highest possible sale price. You invest in the replumb ($4,000-$15,000+), handle the drywall and floor repairs ($1,000-$5,000), list with a real estate agent, and sell to a financed buyer at or near full market value. The trade-off is cost, time (typically 4-8 weeks for repairs plus 30-60+ days on market), and the risk that the project uncovers additional problems.

Option 2: Disclose and List As-Is

You can list the home as-is in Texas without making repairs. You are still required to disclose known plumbing issues on the Seller's Disclosure Notice. The challenge: your buyer pool is limited to cash buyers and investors willing to take on the work themselves. The home will likely sit on the market longer and sell at a discount. Depending on the severity of the plumbing issues, that discount can be significant — especially if the home is uninsurable due to poly-B pipes.

Option 3: Sell to a Cash Buyer

This is the fastest and simplest path. A cash home buyer like Alpha Cash Buyers will purchase your home regardless of plumbing condition — polybutylene, cast iron drain failures, active slab leaks, or any other issue. There is no need to get repair quotes, hire contractors, or wait for permits and inspections. You receive an offer, choose your closing date, and walk away with cash in hand.

We handle homes with plumbing problems regularly throughout Dallas-Fort Worth. Whether the home needs a $5,000 PEX repipe or a $20,000 full replumb with slab work, we factor the repair costs into our offer and handle everything after closing. Learn more about how our process works or explore our pages on selling a home that needs major repairs and homes with code violations.

If you are weighing your options, you can also compare selling methods side by side to see which path makes the most sense for your situation. For homeowners in Dallas specifically, see our sell my house fast in Dallas page for local market information.