Cast Iron Drain Line Replacement in Garland, TX
Responsible Master Plumber Bradley Earp, M-43562 · $97 diagnostic · under-slab tunneling at $425/ft · financing available · 15% off same-day approval
Garland went from about 10,600 people in 1950 to nearly 139,000 in 1980, and most of the houses built in that boom sit on cast iron drains. When those drains start backing up, we find out where with a camera and replace the failing pipe by tunneling under the slab. Your floors stay where they are.
- Licensed & Insured (TSBPE M-43562, Responsible Master Plumber Bradley Earp)
- $97 Diagnostic
- Upfront Pricing
- Certified Price Review
- ★ 4.8 on Google
Garland homes most likely to have cast iron
- Travis College Hill and the streets around downtown (1913–1960). The oldest housing in Garland. Cast iron or even older materials under the house.
- 1960s neighborhoods such as Eastern Hills (median build year about 1967). Cast iron under the slab is expected.
- Club Hill (about 1976) and Camelot (about 1977). Built during the switch to plastic. Some are cast iron, some are mixed, some are early ABS or PVC.
- 1980s and newer. Usually plastic.
Build years are from census history and third-party real estate data; pipe material by era is general trade history.
Use your cleanout to tell where the problem is
The City of Garland's guidance is a quick check every homeowner can do. On homes built before 1970 the cleanout is usually in the back yard; on newer homes it's usually in the front flower bed. Open it during a backup:
- Dry cleanout: the stoppage is between the cleanout and the house, which often means under the slab. That’s the cast iron.
- Full cleanout: the blockage is between the cleanout and the City main, in the yard line.
Either way, call us. A camera turns that clue into a precise location and a price.
How cast iron fails under a Garland slab
Cast iron rusts from the inside. Scale narrows the pipe, then the bottom wears through and water leaks into the clay under the foundation. Garland's expansive blackland clay swells when wet and shrinks when dry, which flexes old joints and opens cracks. Recurring clogs, slow tubs, sewer smell and new foundation cracks are the usual signs.
How we replace it
- Camera inspection of every branch, with video you keep.
- Tunnel under the foundation from outside to the sections that need replacing. No jackhammering through the house in most cases.
- New PVC drain lines , new connections at each fixture group, and a two-way cleanout outside.
- Test, permit and inspection. with the City of Garland (the City lists sewer permit requirements at garlandtx.gov/3183). We pull the permit, meet the inspector, then backfill and compact.
We replace failing cast iron by tunneling under the slab, so floors stay intact. Where a yard section is still round and the route is open, trenchless pipe bursting can replace it without a full-length trench.
Cast iron pipe replacement cost in Garland
Example (illustration only): a 1960s Eastern Hills ranch where only the main line under the house and one bathroom branch are failing. Say 30 feet of tunnel and 1 access hole, with the yard line in good shape: 30 × $425 + 1 × $1,150 = $13,900, or $11,815 approved the same day.
If the camera shows the whole system is failing, the sewer line cost calculator prices a full replacement for the floor plan closest to yours.
Start with a $97 diagnostic
Every job starts with a $97 diagnostic, a camera inspection or walk-through as needed, and a written quote before work begins. We’re open Monday through Saturday and closed Sunday.
Already have another quote? Send it to us.
Certified Price Review: We’ll match or beat apples-to-apples plumbing scopes. Send us a written, itemized cast iron replacement estimate from another licensed plumber. We compare scope, installation method, materials, access/excavation, warranty and diagnostics. If the work is directly comparable, we may adjust our price. Verbal or incomplete estimates may not qualify, and a review doesn’t obligate us to match. See program terms →
Financing: Larger jobs like sewer replacement and repipes can be split into monthly payments, subject to credit approval. See financing options →
Save 15% when you approve the same day. Approve your written quote the day we give it to you and we take 15% off.
Garland cast iron pipe replacement FAQs
How much does cast iron pipe replacement cost in Garland?
$425 per foot to tunnel under the slab, $180 per foot to trench in the yard and $1,150 per access hole. A partial replacement can be under $15,000; a whole house usually costs more. You save 15% by approving the same day.
Where is my sewer cleanout in Garland?
On homes built before 1970 it's usually in the back yard. On newer homes it's usually in the front flower bed.
My cleanout is dry during a backup. What does that mean?
The blockage is between the cleanout and the house, often under the slab. If the cleanout is full, the blockage is between the cleanout and the City main.
Do I need a permit to replace a sewer line in Garland?
Yes, sewer line work requires a City permit and inspection. We handle the permit and meet the inspector.
Can you replace just part of the cast iron?
Yes, if the camera shows the rest is sound. We'll show you the video and price both a partial and a full replacement.
Do you offer financing?
Yes, subject to credit approval.