Water heater replacement permit in Los Angeles, CA
Verified local dataPlumbing · Los Angeles County
Do you need a permit?
In California, replacing a water heater almost always requires a plumbing permit (and often a mechanical or electrical permit too) because the work involves gas or electrical connections, venting, seismic strapping, and a T&P/expansion device. It is governed by the California Plumbing Code (Title 24, Part 5) and the California Mechanical Code (Title 24, Part 4), and is generally pulled by a licensed C-36 contractor.
Verified Los Angeles filing details
- Permit portal
- PermitLA + ePlanLA (LADBS online permits)
verified Aug 9, 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 use the free Angeleno account single sign-on.
- Submission methods
Online · In-person
verified Aug 9, 2026 · source · Online via PermitLA + ePlanLA; in-person at LADBS's Development Services Centers (Metro (Downtown), Van Nuys, West LA, San Pedro)
- Adopted code edition
2025 California Building Code (LA Building Code, LAMC Chapter IX)
verified Aug 9, 2026 · source · Council File 25-1217 — 2025 California Building Standards Code amendments to LAMC Chapter IX, adopted by the City Council December 12, 2025; ordinance effective December 31, 2025. LA adopts the 2025 California Building Code and 2025 California Residential Code with local amendments.
- Fee schedule
- LADBS Fee Schedules — building permit valuation table, plan check fees, and per-trade fee tables
verified Aug 9, 2026 · source
Other local notes
PermitLA handles express permits — simple projects that do not require plan check (see https://dbs.lacity.gov/services/plan-review-permitting/plan-check-permit/express-permits). For projects that need plan check, file through ePlanLA.
verified Aug 9, 2026 · source
Both PermitLA and ePlanLA use the City of LA Angeleno Account single sign-on (see https://permitla.lacitydbs.org/Login/login.html). Contractors must hold a CSLB contractor license (with the matching classification) and a City of LA Business Tax Registration Certificate.
verified Aug 9, 2026 · source
In-person service is available at any of LADBS's Development Services Centers: Metro (Downtown), Van Nuys, West LA, and San Pedro.
verified Aug 9, 2026 · source
Fees are calculated from a building-permit valuation table plus per-trade fee tables (electrical, plumbing, mechanical, grading, fire sprinkler), with the LADBS Permit Fee Calculator providing project-specific estimates before filing.
verified Aug 9, 2026 · source
Documents to prepare
- Plumbing permit application (and electrical/mechanical permits for heat-pump or electric units)
- Contractor license and city business registration
- Manufacturer cut sheet for the new unit (BTU input, gallon capacity, energy factor)
- Venting layout for gas units (B-vent vs. direct-vent; sidewall termination clearances)
- Gas-line size and BTU load calc when upsizing or converting
- Electrical load calc and circuit details for heat-pump or electric tank/tankless installs
- Site detail showing T&P discharge route and termination
Common rejection reasons
- Missing or non-compliant seismic strapping (two straps — upper third and lower third)
- T&P discharge terminating to an unapproved location (interior, into a fixture, or with reduced pipe size)
- No expansion-tank detail on a closed system (backflow preventer or PRV present)
- Vent termination clearances not shown for gas units, especially sidewall direct-vent
- Gas line undersized for the new unit's BTU input — common on tankless upsizes
- Combustion-air requirements not met for indoor gas installations
Inspection sequence
- Underground/rough not typically required for an in-place replacement
- Gas pressure test for new or modified gas piping
- Final inspection with the unit installed, strapped, vented, T&P routed, and tested
Usually no permit
- Relighting a pilot or replacing a thermocouple on the existing unit
- Adjusting the thermostat or replacing the anode rod
- Insulating exposed hot-water lines or the existing tank's blanket
Who can pull it
Water heater work in California is generally performed by a C-36 (Plumbing) licensed contractor — or a C-20 (HVAC) when the unit is classified as a warm-air-furnace/water-heater combo, or a C-10 (Electrical) for the electrical-only portion of a heat-pump install. A B (General Building) contractor may pull within a larger project under CSLB rules. The contractor doing the work typically pulls the permit.