Note to readers: This post was updated on July 30, 2026 to refresh cost guidance and add links to our related sewer line resources. We refreshed the details below so the advice reflects how we approach this work today.
Sewer line replacement can get expensive fast – which is why Western Rooter & Plumbing offers no-dig sewer line replacement options along with free cost estimates. We also include a free sewer video camera inspection with any drain cleaning service – call (626) 448-6455 to schedule.
What we’ll cover:
- What a sewer line actually is
- Why sewer lines fail
- What replacement typically costs
- Cost per foot
- How to get a free estimate
- House-to-street replacement costs
- How to keep costs down
- What a no-dig replacement costs
What is a sewer line?
Your sewer line carries wastewater from every drain in your home – toilets, sinks, showers – out to the street’s main sewer line. Most older homes in our service area use cast iron or clay pipe. For more terms like this, see our plumbing glossary.
Why do sewer lines need replacing?
- Tree roots. One of the most common causes of sewer line failure in our area – see the signs your main line is failing.
- Pipe corrosion. Cast iron corrodes over decades, eventually creating holes and cracks.
- Ground movement. Settling homes and shifting soil can crack or misalign a line.
- Old age. Most sewer lines run about 50 years before they need replacing.
- Poor installation. A line installed incorrectly can fail well ahead of schedule.
How much does sewer line replacement cost?
Sewer line replacement generally runs $3,000–$20,000+, with most homeowners in our service area landing between $5,000 and $10,000 depending on pipe location, damage severity, and length of pipe replaced. Every job is different – that’s why we provide free, no-obligation estimates.
Sewer line replacement cost per foot
Cost per foot typically runs $50–$300, depending on pipe type and site conditions. Some jobs only need a few feet; others – especially lines over 40 feet – can run higher. Pricing varies by contractor, so always get quotes in writing.
Get a free estimate from Western Rooter
The most accurate way to know what your job will cost is to call us at (626) 448-6455 or send a message through our site. We provide free estimates by phone and in person, and we’ll walk you through the numbers before any work starts.
Replacing a line from house to street
A full house-to-street replacement often runs over $10,000, mainly driven by cost per foot and any additional work needed along the way, like a new lateral line. We’ll confirm the scope with a sewer video camera inspection before quoting.
How to keep costs down
A few things help: ask about current specials (see our tips on asking your plumber for a discount), get a video inspection before assuming you need a full replacement, and ask specifically about trenchless replacement – it’s often cheaper than digging up your yard.
What does a no-dig sewer line replacement cost?
Trenchless replacement pushes new pipe through the old line instead of excavating your yard, which typically means a lower cost per foot and far less disruption to your property than traditional dig-and-replace methods.
