Sewer line replacement permits in Santa Monica, CA

General California guidance last updated May 22, 2026 · Santa Monica data verified August 9, 2026

What plumbing contractors need to know about pulling a sewer line replacement permit in Santa Monica (Los Angeles County).

Short answer

In California, replacing a sewer lateral or building drain needs a plumbing permit, pulled by a licensed C-36 (Plumbing) or C-42 (Sanitation) contractor under the California Plumbing Code (Title 24, Part 5). The work often coordinates with the city's wastewater utility, and an encroachment / right-of-way permit is generally required when work extends into the public right-of-way.

Santa Monica accepts submittal through the Santa Monica Citizen Access (with ProjectDox e-plan review) and has adopted the 2025 California Building Standards Code. Fee details and sources are below.

Santa Monica permit data

Sourced from public City of Santa Monica documents — every field carries the source URL and verification date.

Permit portal
Santa Monica Citizen Access (with ProjectDox e-plan review)

verified Aug 9, 2026 · source · Permit applications are created and submitted in Citizen Access; project plans and documents upload to ProjectDox (https://plans.smgov.net) for Electronic Plan Review (EPR)

Adopted code edition

2025 California Building Standards Code

verified Aug 9, 2026 · source · In effect as of January 1, 2026 — submittals received on or after that date are reviewed under the 2025 code; submittals received through December 31, 2025 are reviewed under the 2022 edition

The general picture in California

A sewer-line replacement covers the building's drain from the foundation out to the city main (or septic). The permit covers pipe material (typically ABS, PVC SDR-35, or cast iron for certain conditions), slope, bedding, cleanouts, backwater valve (required by ordinance in many California cities on lateral replacements), and connection to the city main. Trenchless methods — pipe bursting and cured-in-place pipe (CIPP) lining — are common and have their own submittal requirements. Work in the public right-of-way (between the property line and the main) often requires a separate encroachment permit from public works on top of the building permit.

For deeper background that isn't Santa Monica-specific, see the statewide sewer line replacement guide.

Typically needs a permit

Sewer line replacement itself triggers a permit in nearly every California jurisdiction, Santa Monica included. Santa Monica-specific variations are confirmed with the issuing department above.

Usually doesn't (general norm)

  • Clearing a drain stoppage with a snake or hydro-jet
  • Repairing a single broken section of accessible pipe with the same material
  • Camera-inspecting an existing lateral for diagnostics

Documents & plans generally required

Common reasons sewer line replacement applications get bounced

Code-rooted patterns across California — not a Santa Monica-specific rejection rate.

The inspection sequence

A typical order — the number of stops and exact sequence vary by jurisdiction and scope.

  1. 1Pre-cover inspection with the new pipe in place, sloped, supported, and air/pressure-tested
  2. 2Right-of-way / utility inspection at the connection to the city main (when applicable)
  3. 3Final inspection with backfill, restoration, and any required surface work complete

Licensing — who can pull it

Sewer-line replacement in California is generally performed by a C-36 (Plumbing) or C-42 (Sanitation) licensed contractor; a B (General Building) contractor may pull within a larger project under CSLB rules. The licensed contractor doing the work typically pulls the permit; work in the public right-of-way may also require a separate encroachment-permit filing.

Other verified Santa Monica notes

Frequently asked questions

Do I need a permit to replace a sewer lateral in California?

Yes — replacing the building lateral (from the foundation to the city main) is permitted plumbing work in every California jurisdiction. Work in the public right-of-way usually requires an additional encroachment / right-of-way permit from the city's public works department.

What is a backwater valve and when is it required?

A backwater valve prevents sewer backflow into the building during a main-line surcharge. The California Plumbing Code requires one when any fixture is below the next upstream manhole rim; many California cities require one on every lateral replacement regardless. Check the local ordinance.

Do trenchless methods (pipe bursting, CIPP) need a permit?

Yes — trenchless methods need the same plumbing permit, plus submittal details specific to the method: host-pipe condition, bursting head size or liner thickness, and cure procedure. Inspection sequencing may differ — some jurisdictions verify the lined pipe with a post-install camera inspection.

Who connects to the city main?

The contractor performs the tie-in, but the city's public works or wastewater utility typically inspects (or requires advance notice of) the connection. Encroachment permits cover the work in the right-of-way; some cities require their own crew to perform the actual tap.

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