LA Sanitation divides your sewer lateral into two parts. Knowing which part has the problem changes the repair and the permits.
Written byNew Pro Plumbing·Reviewed byMiguel Lopez, Owner & Licensed Plumber, New Pro Plumbing (CSLB #974600)·Last reviewedSeptember 2026 · 8 min readQuick Answer
In the City of Los Angeles, LA Sanitation describes the sewer lateral in two parts: the upper lateral, from the building to the property line, and the lower lateral, from the property line to the main, usually under the street, alley, or an easement. The property owner is responsible for maintaining and repairing both. In Mar Vista, the lower lateral often runs under a parkway street tree, which makes it the most root-damaged section.
The upper lateral runs across your property, typically under the yard, driveway, or walkway. The lower lateral picks up at the property line and continues to the main, which is usually under the street, sometimes under an alley or an easement on private land. Many owners assume the lower lateral is the City's responsibility. Under LA Sanitation's description, it isn't; the owner maintains and repairs the full lateral. This page is part of our complete guide to sewer line repair in Mar Vista.
Upper & Lower Lateral Repair: The upper lateral is the section of a sewer lateral from the building to the property line; the lower lateral runs from the property line to the public sewer main.
The distinction matters for repairs. Upper-lateral work stays on private property. Lower-lateral work often happens in the public right-of-way, which can mean additional permitting and, if excavation is needed, working in the street. Trenchless methods can often reach the lower lateral from the property side.
In Mar Vista, the lower lateral often runs under a parkway street tree, which makes it the most root-damaged section. Mar Vista's parkway street trees sit right above many lower laterals.
We record to the main and note where the property line falls.
Upper, lower, or both.
Plumbing permit, plus any right-of-way permitting for the lower lateral.
Often trenchless from your side for the lower lateral.
Camera first, always. Every recommendation starts with a recorded inspection you can watch yourself, and a flat-rate price you approve before we start.
That upper-lower split explains a lot of frustration in Mar Vista. Many owners have had the yard section of the lateral repaired, only to have backups continue, because the lower lateral under the parkway, often directly beneath a mature street tree, is the worst part of the line. We camera past the property line to the main every time, mark where the upper lateral ends, and show you which section is actually failing. When the lower lateral needs work, we plan it from your side, with the right City permits in place.
Much of Mar Vista's housing is seventy to a hundred years old, and sewer laterals from that era were laid in short clay or cast-iron sections with a joint every few feet. Recurring backups after the lines are cleared are usually the sign that the pipe itself, not just the clog, has become the problem. Miguel's crews have worked these streets since 2010, so the layout of a typical Mar Vista lateral is familiar ground.
Not sure what your line needs? We camera it first, then quote a flat rate.
Get a Free Quote| Detail | Mar Vista |
|---|---|
| Area | Mar Vista, CA 90066 |
| Jurisdiction | City of Los Angeles |
| Permits | LADBS (City of Los Angeles) |
| Typical access | A cleanout or fixture; targeted excavation only when needed |
| First step | Camera inspection with a copy of the recording |
| Pricing | Flat-rate, in writing, before work starts |
| Availability | 24/7, including weekends and holidays |
| License | CSLB #974600, insured |
| Languages | English and Spanish |
Sewer lateral work at a Mar Vista address falls under the City of Los Angeles, with permits issued and inspected by LADBS. LA Sanitation splits the lateral into an upper section, from the house to the property line, and a lower section, from the property line to the main, and the owner is responsible for maintaining both. Ask us about the LASAN rebate status before we schedule; we'll point you to the current program page.
Example scenario below is illustrative, based on common situations we see. Details vary by property; not a specific customer.
A Mar Vista owner replaced the upper lateral three years ago, but backups returned.
Our camera shows the lower lateral under the parkway ficus is cracked and root-packed.
We line the lower lateral from the cleanout, and the backups end without cutting the street.
Licensed by the CSLB (#974600) and insured, New Pro has been fixing Westside sewer lines, including in Mar Vista, since 2010. You'll know the scope, schedule, and total cost in writing before we start. We're available 24/7, including weekends and holidays, when a backup can't wait.
Also serving neighborhoods near Mar Vista: Palms, Del Rey, Culver City, Westdale. See all Westside service areas.
The Bottom Line
Your responsibility doesn't end at the property line. We camera both sections of the lateral, identify where the problem is, and plan the repair and permits accordingly.
LA Sanitation’s description says property owners are responsible for maintaining and repairing their sewer lateral, including the lower lateral to the main. In the City of LA, the property owner is responsible for the entire lateral from the building to the connection at the public main, including the section under the parkway and street. See LASAN’s sewer lateral information page.
Usually near the sidewalk or parkway. We note it on the camera footage based on distance and your lot. The upper lateral runs from the building to the property line; the lower lateral runs from the property line to the main. Both are the owner’s, but they can require different permits.
Work in the public right-of-way can require additional City permitting beyond the standard plumbing permit. We’ll confirm it for your job. Work in the public right-of-way (street, alley, parkway) adds an excavation or use-of-street permit on top of the plumbing permit. We include those in the quote.
Often, yes, from the property side, if the pipe is intact enough. Trenchless lining or bursting can renew both sections from a cleanout without cutting the street in many cases. See our trenchless overview.
Often because the lower lateral under the parkway is failing. We camera past the property line to the main to check. For Mar Vista, both upper and lower lateral are the owner’s responsibility per LASAN. Public right-of-way work adds a permit; we handle both.
This page was written by the New Pro Plumbing content team and reviewed for technical accuracy by Miguel Lopez, owner and California-licensed plumber (CSLB #974600). Agency rules are summarized from the official sources above; programs and requirements can change, so confirm current details with the agency. Nothing here is a quote. We confirm scope and pricing in writing before any work begins.
What’s new: September 2026, first publication.
LA Sanitation divides your sewer lateral into two parts. Knowing which part has the problem changes the repair and the permits.
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