Whole-house repipe permits in Los Angeles, CA

General California guidance last updated May 22, 2026 · Los Angeles data verified May 22, 2026

What plumbing contractors need to know about pulling a whole-house repipe permit in Los Angeles (Los Angeles County).

Short answer

In California, a whole-house repipe needs a plumbing permit, pulled by a licensed C-36 contractor under the California Plumbing Code (Title 24, Part 5). The permit covers replacing existing supply (and sometimes drain/waste/vent) piping; common drivers include failing galvanized or polybutylene supply, slab leaks, low-pressure complaints, and pinhole leaks in copper.

Los Angeles accepts submittal through the PermitLA + ePlanLA (LADBS online permits) and has adopted the 2025 California Building Code (LA Building Code, LAMC Chapter IX). Fee details and sources are below.

Los Angeles permit data

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

Permit portal
PermitLA + ePlanLA (LADBS online permits)

verified May 22, 2026 · source · PermitLA (https://permitla.lacitydbs.org) handles express permits that do not require plan review; ePlanLA (https://eplanla.lacity.org) handles permits that require plan check. Both require a free Angeleno account.

Adopted code edition

2025 California Building Code (LA Building Code, LAMC Chapter IX)

verified May 22, 2026 · source · Per Council File 25-1217 (ordinance amending LAMC Chapter IX, December 2025); LA adopts the 2025 California Building Code and 2025 California Residential Code with local amendments

The general picture in California

A repipe replaces the hot/cold supply distribution throughout a structure — most commonly converting galvanized or polybutylene to PEX or copper. The permit covers pipe material, sizing, routing, fastening, insulation, manifold or trunk-and-branch layout, and pressure testing. Drain/waste/vent repipes add slope, venting, and cleanout requirements. Drywall and finish repairs are out of scope of the plumbing permit but may require their own permits if structural framing is altered.

For deeper background that isn't Los Angeles-specific, see the statewide whole-house repipe guide.

Typically needs a permit

Whole-house repipe itself triggers a permit in nearly every California jurisdiction, Los Angeles included. Los Angeles-specific variations are confirmed with the issuing department above.

Usually doesn't (general norm)

  • Replacing an exposed section of supply pipe with the same material and routing (repair)
  • Replacing a fixture supply line, angle stop, or stop valve
  • Tightening or replacing a single fitting on existing pipe

Documents & plans generally required

Common reasons whole-house repipe applications get bounced

Code-rooted patterns across California — not a Los Angeles-specific rejection rate.

The inspection sequence

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

  1. 1Rough/cover inspection with new piping exposed, pressure-tested, and supported
  2. 2Insulation inspection for Title 24 hot-water-line insulation where applicable
  3. 3Final inspection with fixtures reconnected, pressure restored, and the system tested

Licensing — who can pull it

Repipes in California are performed by a C-36 (Plumbing) 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.

Other verified Los Angeles notes

Frequently asked questions

Do I need a permit for a whole-house repipe in California?

Yes — replacing supply (and/or DWV) piping throughout a structure is permitted plumbing work in every California jurisdiction. The permit covers material, sizing, routing, and pressure testing; the inspector typically signs off at rough (pre-cover) and at final.

Is PEX allowed throughout California?

Yes — PEX has been approved statewide for potable water under the California Plumbing Code for over a decade. Some jurisdictions still require specific listings or limit certain fitting types; the listing should be shown on the permit submittal.

Do I need a separate permit for drywall repair?

The plumbing permit covers the pipe work only. Drywall and finish repair are typically follow-up work and don't require a separate permit unless structural framing is altered. Inspectors will require pipe access (open walls or strategic cuts) at the rough inspection.

Can a repipe be done in an occupied home?

Generally yes — most residential repipes are done with the occupants in place, with water shut off for short periods. The permit doesn't restrict occupancy; sequencing is a contractor/owner decision.

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