A sewer line that keeps backing up after cleaning is often a broken pipe, not a stubborn clog. Our 24/7 emergency line takes these calls, and while you wait you should stop water use, keep the lowest drain area clear, and stay away from standing sewage.
Sewer line repair in Lafayette, CA starts with a camera so we can see the actual damage. Depending on what it shows, the fix may be a short spot repair, a trenchless liner, a cast iron section swap or a full replacement.
This page lays out how those choices compare, what the permits look like, and how to tell whether you need repair or only cleaning.
Why a camera look comes before any repair quote
Repair estimates made without seeing the pipe are guesses. A push camera on a locator-equipped cable tells us the material, the depth, where the damage starts and ends, and whether the pipe holds water in a sag.
We mark the spot at the surface so you can see what a repair would disturb. Our sewer inspection service records the footage, and if you want a second opinion you have something to show another contractor.
Without the video, the choice between patching a few feet and replacing the run is a coin toss.
Cracked lateral with roots in the joint
Roots enter through cracks and open joints, then grow into a mat that catches paper and grease. Cutting them with a sewer line cleaning visit restores flow, but the crack remains and the roots return.
Central San reports that root intrusion is the leading cause of sewer backups. If your line needs cutting every year or so, the pipe itself is the problem and the permanent answer is repair.
Spot repair or the whole run?
The camera usually points to one of these outcomes.
| What the camera shows | Likely repair | Trade-off |
|---|---|---|
| One short crack or a single bad joint. | Spot repair, dig and replace a section. | Smaller excavation, rest of pipe stays old. |
| Several defects along one run. | Trenchless lining | Little digging, slightly smaller bore. |
| Collapsed or offset pipe, or a belly. | Open trench replacement. | More digging, new fall and fresh pipe. |
| Cast iron flaking inside. | Section swap or lining. | Depends on remaining wall thickness. |
If most of the run is sound and defects are few, repairing the bad part is usually sensible. If damage appears throughout, a full replacement avoids paying for repeated patches.
Trenchless lining versus open trench
Neither is always better. Honest differences:
| Factor | Pipe lining | Open trench |
|---|---|---|
| Yard and driveway disturbance. | Small access pits. | Long trench |
| Works on collapsed pipe. | No | Yes |
| Can correct a low spot. | No | Yes |
| Pipe diameter after. | Slightly reduced | Full new size. |
| Cleaning afterward | Camera first, then jet. | Standard |
| Best when | Pipe is cracked but in line. | Pipe is crushed, offset or sagging. |
Lining also needs the pipe cleaned thoroughly first, which may involve hydro jetting before the liner goes in.
Old cast iron: corrosion and the repair choices
Older homes often have cast iron between the house and the cleanout. It lasts a long time, but it rusts from the inside, forms rough scale, and eventually cracks or flakes at the bottom of the pipe where waste sits.
A scope shows how much wall remains. If the pipe is thick enough, we may cut out a failed section and join to new pipe with a no-hub coupling or sleeve. If scale covers the whole run, lining or replacement is sounder than repeated patches.
Ask us about repiping if indoor drain stacks are also aging, since it can make sense to schedule related work together.
Permits for sewer lateral work
Rules depend on where the digging happens:
- Central San requires a permit for all lateral work except routine cleaning.
- Work in the street or public right of way needs a city encroachment permit.
- Call 811 (USA North 811) before digging so buried lines are marked.
- Ask the city building department about anything else, since permit rules vary.
- The Central San permit counter can be reached at (925) 229-7371 for questions.
Local note: you own the pipe all the way to the main
Central San guidance puts the entire lateral, from your house to the district main, in the property owner's hands, including the part under the sidewalk. A crack near the street is therefore yours to fix, and it is where the encroachment permit comes in.
Neighbors in Orinda and across Lamorinda follow the same ownership rules. Read the Central San home guide to confirm your cleanout and lateral layout before work starts.
Sewer backup emergency: what to do tonight
If sewage is coming into the house, treat it as an urgent situation.
- Stop all water use.
- Keep people and pets out of the affected room.
- Stay away from wet outlets and power strips.
- Do not open the cleanout if sewage is pushing against the cap.
- Call our 24/7 line. We can clear the line first, then camera it to plan the repair.
What decides the cost of sewer repair
The price depends on pipe depth, length of damaged pipe, what the surface is (lawn, concrete, landscaping), permits, trenchless versus open trench, and whether the line must pass under the street. Access and obstacles such as trees also matter.
Many homeowner policies cover sudden water damage but not the failed sewer pipe itself, so read your policy and ask your insurer. Call for a clear price before work starts, and we will put the scope in writing for your review.
Sewer repair questions homeowners ask us
Yes. Our 24/7 line takes sewer backup and break calls at any hour. We clear the line to stop the emergency, then schedule repair work, and same-day appointments are possible when available.
If the line backs up again within months, if the cable keeps hitting a stop, or if a camera shows cracks, offsets or collapse, cleaning only buys time. Repair addresses the cause.
Not always. Lining saves landscaping and driveway, but it needs pipe that is still in line and cleaned beforehand. A crushed or sagging pipe needs open trench replacement.
Central San guidance says the property owner owns the lateral to the district main, including the street portion. Digging there also needs a city encroachment permit.
Sometimes. If the wall is still thick, a damaged section can be replaced. If scale and corrosion run throughout, lining or replacement is a better investment.
Depth, length, surface to restore, permits, method, and street work. We give a clear price before work starts.
Central San requires one for all lateral work except routine cleaning. Street work needs a city encroachment permit as well.
Still unsure what you are dealing with? Call the 24/7 line and describe it to a dispatcher.
Call (855) 575-2890