Sewer Line Trenching and Installation

in Los Angeles


Metro LA Utility Trenching provides complete sewer line trenching and underground installation services for residential, commercial, and municipal projects throughout Los Angeles County. From precision excavation to full sewer system installation, our licensed crews manage every phase — one crew, one contract, start to finish.


We work alongside plumbing contractors, general contractors, property developers, and municipalities across LA to deliver reliable sewer infrastructure built to code and built to last.

Sewer Line Trenching and Installation Services

We handle the full scope of underground sewer work — trench excavation, pipe installation, tie-ins, and complete site restoration. Whether your project is a residential lateral replacement or a large commercial sewer main installation, we have the equipment and crew to execute it efficiently.


Our sewer line services include:


  • Sewer lateral trench excavation
  • Sanitary sewer main installation
  • Sewer line replacement and re-routing
  • Pipe bedding and proper backfill compaction
  • Cleanout installation
  • Connection and tie-in to existing sewer systems
  • Storm drain trenching and installation
  • Full site restoration including asphalt and concrete repair


Who We

Work With

We regularly complete sewer line trench and installation work for:


  • Plumbing contractors needing excavation and trench support
  • General contractors on new construction and remodel projects
  • Property developers on residential and commercial developments
  • Cities and municipalities upgrading aging sewer infrastructure
  • Homeowners replacing failed or deteriorated sewer laterals


If your project requires coordinated trench work across multiple utility types, we can open a single joint trench to accommodate sewer alongside water, electrical, or other utility runs — reducing total excavation cost and site disruption.

Our Sewer Line Process

Site Assessment

We start with a full site review covering soil conditions, existing utility locations, trench depth requirements, and access constraints. We identify potential conflicts early and establish a clear plan before any equipment hits the ground.

Utility Marking and Potholing

Before any excavation begins we coordinate with 811 and perform vacuum potholing at key locations to verify the exact position of existing underground utilities. This protects existing infrastructure and keeps your project on schedule.

Precision Excavation

Our operators trench to exact depth and width specifications — clean sidewalls, proper grade, consistent bedding. We work efficiently on open sites and confined urban job sites alike, with equipment matched to each location's conditions.

Sewer Line Installation

Our licensed crews install sewer pipe, cleanouts, and tie-ins to project specifications and all applicable Los Angeles County and California code requirements. We coordinate directly with your plumbing contractor or municipal authority throughout installation.

Backfill and Restoration

Once installation passes inspection we backfill, compact to required density, and fully restore the surface — including asphalt and concrete repairs where required.

Why Choose Metro LA Utility Trenching

We've been trenching and installing underground utilities throughout Los Angeles County for over 15 years, completing sewer projects ranging from single-family lateral replacements to large commercial and municipal sewer main installations.


Our crews understand the code requirements and inspection demands of sewer work in LA County. We maintain all certifications required for public and private works, carry full insurance, and are experienced coordinating with LADWP, local water districts, and city inspectors throughout the installation process.


One crew. Full scope. Trench to restoration.



We also provide fiber optic trenching, water main trenching, electrical conduit trenching, and gas line trenching throughout Los Angeles County.

Frequently Asked Questions — Sewer Line Trenching

in Los Angeles

  • How deep are sewer lines buried in Los Angeles?

    Residential sewer laterals in Los Angeles are typically buried between 18 inches and 6 feet deep depending on the property, slope, and connection point. Main sewer lines are often deeper. We assess each project individually and trench to the exact depth required.

  • Do you handle both the trenching and sewer line installation?

    Yes. We provide complete underground sewer services including trench excavation, pipe installation, cleanout installation, tie-ins to existing systems, and full site restoration — all under one contract.

  • Do you replace existing sewer lines or only install new ones?

    Both. We handle new sewer lateral and main installations as well as full replacements of failed, cracked, or deteriorated sewer lines.

  • Do you handle permits for sewer line work in Los Angeles?

    Yes. We manage permit applications with local authorities and coordinate with inspectors before and during installation to ensure full compliance.

  • How long does sewer line trenching and installation take?

    A typical residential lateral replacement can be completed in one to two days. Larger commercial or municipal sewer main projects are scoped individually based on length, depth, and site conditions.

  • Do you offer emergency sewer line trenching in Los Angeles?

    Yes. We maintain rapid-response crews available for urgent sewer excavation and installation across LA County.