Cast Iron Sewer Pipe Replacement Pricing Serving Dallas, Plano, Richardson, Garland & Surrounding North Texas Cities
Cast iron pipe replacement cost in North Texas depends on the layout of the home, access conditions, and excavation requirements. At In-House Plumbing Company, we specialize exclusively in full residential old cast iron pipe replacement and cast iron to PVC conversion. Below, you’ll find realistic underground pipe replacement cost ranges, visual layout examples, and clear explanations so you can better understand what to expect before scheduling a free in-person evaluation.
At In-House Plumbing Company, serving you is our business. That includes being clear and honest about pricing for cast iron sewer pipe replacement.
Replacing cast iron pipes is not a small repair, and there is no single price that applies to every home. Every property is different, and an exact cast iron pipe replacement cost cannot be determined without seeing the home in person. What we can provide are realistic pricing ranges, visual examples, and clear explanations so you can make informed decisions and avoid overpaying.
What Can You Expect to Pay?
(As of 2026)
Based on our experience replacing cast iron sewer pipes since 2001, here are realistic pricing ranges for full residential underground pipe replacement projects:
Under $17,000
$17,000 – $27,000
Most projects
$27,000 – $37,000
Some more complex cases
Over $37,000
Rare, high-complexity jobs
Since 2001, we’ve only had three projects exceeded $45,000.
These ranges reflect typical project totals homeowners pay for full old cast iron pipe replacement, based on standard scheduling and availability, as of 2026. They are not quotes, but they are realistic.
Example Home Layouts by Price Range
The diagrams below are simplified layout examples, not construction plans. They are intended to help homeowners visually compare their home’s layout to common scenarios and better understand which pricing range their home may fall into for cast iron to PVC conversion.
Actual pricing depends on conditions that can only be determined during an in-person evaluation.
Under $17,000
Homes Often
$17,000 – $27,000
Most Homes
$27,000 – $37,000
Some More Complex Homes
Over $37,000
Rare, High-Complexity Homes
Pier & Beam Homes
These pricing examples are based on concrete slab homes.
We also provide pipe replacement services in pier and beam homes. Those projects are generally less expensive than slab underground pipe replacement with a similar layout. The same layout comparisons shown above can still be useful when evaluating where a pier and beam home may fall.
Full Replacement vs. Partial Replacement (Important)
The pricing ranges shown on this page assume a full cast iron replacement.
Partial replacement will cost more over time — guaranteed.
When work is done in stages, homeowners pay for duplicate permits, inspections, excavation, setup, and labor minimums multiple times. In many cases, previously completed work must be revisited or partially redone to connect the remaining system.
Some homeowners believe they can divide a full replacement into parts and pay the same total over time. That does not happen. Even if pricing never increases, completing the work in stages will always cost more than replacing the entire system at once.
Partial replacement may be necessary in some situations, but it is important to understand the long-term cost difference before making that decision.
Options — Not One-Size-Fits-All Pricing
We do not believe in one-size-fits-all pricing.
The price ranges on this page are meant to show what homes with similar layouts and complexity often fall into. Many homeowners can add options such as extended warranty coverage, sprinkler responsibility, or brick reinstatement and still remain within the same general price range — but the only way to know for sure is an in-person evaluation.
Your estimate will include clear, selectable options so you can choose what you want included and what you don’t.
Discounts, Payment Options & Flexibility
The price ranges shown reflect regular pricing.
From time to time, we offer public discounts that may be advertised through our website, social media, or Google profile. When available, those discounts are always included in our estimates for full cast iron to PVC conversion projects. Discounts are not guaranteed for partial replacements.
We also offer a check payment option, which allows homeowners to avoid credit card processing fees.
Payment method, warranty length, and optional services are included as selectable options on your estimate, allowing you to tailor pricing to your specific needs.
What Has the Biggest Impact on Cast Iron Pipe Replacement Cost
Some of the biggest factors that influence underground pipe replacement cost include:
- Pools, patios, driveways, and decorative concrete
- Landscaping and outbuildings
- The amount of tunneling versus trenching required
- Where the city sewer connection is located relative to the home and obstacles
- Overall layout and access conditions unique to the property
Two homes with very similar layouts can have very different pricing depending on these factors.
In-Person Evaluations — What That Includes
We provide a free in-person evaluation for homeowners who are seriously considering full residential cast iron pipe replacement.
The visit typically takes 1 to 2 hours and includes:
- Evaluating the home inside and out
- Documenting plumbing fixture locations
- Measuring the structure and yard
- Noting landscaping, driveways, sidewalks, patios, pools, and other obstacles
That information is sent to our office, where a detailed estimate is prepared along with a hand-drawn, scaled diagram showing planned excavation areas such as tunneling and trenching.
Because this process requires full access and detailed measurements, we schedule in-person visits once homeowners understand the scope and are ready to explore full underground pipe replacement.
About Inspections & Testing
We do not perform camera inspections, pipe testing, or diagnostic services.
In Dallas, Plano, Richardson, Garland, and surrounding North Texas cities, cast iron sewer pipe is typically 40 years old at a minimum, and most systems are significantly older. Cast iron has a known service life, and these systems are well past it. In many homes, the pipe has already failed or is actively failing.
Inspecting, testing, or attempting temporary repairs does not change that outcome and only adds unnecessary cost. For that reason, we focus exclusively on full residential old cast iron pipe replacement.
Our Focus
In-House Plumbing Company provides pipe replacement services focused exclusively on full residential cast iron sewer pipe replacement. We do not perform spot repairs, trenchless patches, hydro-jetting, or general plumbing services. Our work centers on complete underground pipe replacement and cast iron to PVC conversion for North Texas homeowners.
Frequently Asked Questions About Cast Iron Pipe Replacement Cost
What is the average cast iron pipe replacement cost in Dallas?
Most full residential underground pipe replacement projects in North Texas fall between $17,000 and $27,000. Pricing depends on layout, access conditions, and excavation requirements.
Does insurance cover old cast iron pipe replacement?
In most cases, insurance does not cover cast iron pipe replacement cost when failure is due to age-related deterioration. Coverage depends on your specific policy.
Why replace cast iron instead of repairing it?
Old cast iron pipe replacement eliminates corrosion and structural deterioration that cannot be permanently repaired. Full replacement prevents recurring system failures.
How long does cast iron to PVC conversion take?
Most full residential cast iron pipe replacement projects are completed within 3 to 5 business days, depending on complexity and weather conditions.
Is partial replacement cheaper than full underground pipe replacement?
Partial replacement may appear less expensive initially, but duplicate permits, excavation, and labor typically make staged work cost more over time than full replacement.
When You’re Ready
If this page helped you better understand where your home may fall, the next step is a free, no-pressure in-person evaluation for homeowners who are ready to consider full cast iron pipe replacement.
We’ll review your layout, explain your options clearly, and give you our honest opinion so you can decide what’s best for your home.
Still Researching?
See how the replacement process works from start to finish.
Have Questions?
Have questions about your specific home? Call our team to discuss your situation.
Ready to Explore?
Schedule an in-person evaluation.
Because pricing can change over time for many reasons, it's best to schedule your evaluation when you're ready to move forward.
