Electrical and Plumbing Permits in Los Angeles: Which Jobs Need One and How the Process Works

Which jobs need permits in the City of Los Angeles?

The short rule: if a job adds, moves or replaces wiring, piping or a gas appliance, the city wants a permit. If it swaps a worn part for the same part in the same spot, it usually does not. LADBS usually writes one permit per trade, even when both cover one bathroom, though a simple fixture-only remodel in a house can go out on a combined permit.

On the electrical side, these jobs need a permit inside the city limits:

• Panel replacements and service upgrades, such as the 100 to 200 amp jump common in 1950s to 1970s Valley tract homes.
• New circuits for a kitchen remodel, a mini-split, a hot tub or a workshop.
• EV chargers, hardwired or on a 240-volt receptacle.
• Rewiring, from one room of cloth-covered cable to a whole 1920s bungalow.
• Subpanels, ADU feeders, generators and transfer switches.

On the plumbing side, the list runs longer than most owners expect:

• Water heater replacement, tank or tankless, even on the old footprint.
• Whole-house repipes and any new or rerouted water line.
• Gas lines, new or extended, for a range, a dryer or a fire pit.
• Sewer repairs and replacements, plus new drains and vents.
• Remodel rough-ins, where fixtures move or a new bathroom appears.
• Earthquake gas shutoff valves, which also have to be a state-certified model.

We work as a licensed electrician and plumber in Los Angeles, so both permit types cross our desk every week. The city cares most about work that ends up hidden behind a wall, under a slab or inside a panel.

Job by job: is a permit typically needed, and who inspects?

The table covers the jobs owners ask us about most. It reflects usual practice inside the City of Los Angeles, and other cities differ in the details. When a job sits near the line, ask LADBS or us before work starts.

Common jobs in the City of Los Angeles: permit typically needed, and who inspects

Two rows surprise people. A water heater swap touches gas, venting and earthquake bracing, and escrow asks for the signed permit behind a seismic gas valve.

What usually does not need a permit?

Maintenance and like-for-like swaps usually need nothing from the city. The California Electrical Code and the California Plumbing Code, as Los Angeles adopts them, leave room for minor repairs. The list below is the common reading, and the inspector has the last word.

• Replacing a receptacle, a switch or a light fixture on the same box, with no new cable.
• Swapping a faucet, a shower head, a toilet fill valve or a supply stop in the same position.
• Clearing a drain, snaking a line or jetting it, since none of that changes the pipe.
• Fixing a drip at a fitting, or replacing an exposed trap under a sink.

The hedge matters because the line moves with the details. A toilet is the exception: Los Angeles generally asks for a plumbing permit even when a new toilet goes on the old flange, and it is a simple express permit, so ask first. A GFCI on the same box is a repair, and a receptacle added two feet away is a new outlet.

When in doubt, ask one question. Does anything new go inside a wall, a ceiling, the ground or the panel? If the answer is yes, plan on a permit.

How does LADBS issue a trade permit: express or plan check?

LADBS sorts trade work into two paths. Simple jobs go out as express permits, which means no plan check and no drawings. A licensed contractor or an owner applies through the online permit system on ladbs.org and describes the scope. A water heater swap, a house panel upgrade, a charger circuit and a repipe usually travel this way.

Plan check is the slower path, and it applies when the city wants to see the design first. Commercial tenant improvements, large services, new buildings, additions and ADUs usually land here. For example, a restaurant build-out in a Van Nuys strip mall needs electrical plans with load calculations and plumbing plans with fixture counts.

Most house jobs never see plan check. The exception is the remodel that grows. A bathroom refresh turns into a moved wall, and the building permit for that wall pulls the trade permits in behind it.

Every permit also carries a clock. If inspections stall, the permit lapses, and we find expired ones on many Valley houses where nobody ever called for the final.

Who pulls the permit: a licensed contractor or the owner?

Two parties can pull a trade permit on a house: a contractor whose license covers that trade, or the owner acting as an owner-builder. Electrical work calls for a C-10 classification, and plumbing calls for a C-36.

The owner-builder route is legal, and it shifts the risk. The owner signs a declaration and answers for code compliance, for corrections and for anyone working on site. If those workers carry no license and no workers' comp, an injury on the job can land on the owner. The state license board warns about one pattern in particular: a contractor who asks you to pull the permit yourself. That request often means a missing license, a suspended one or no insurance.

Checking a license takes two minutes at cslb.ca.gov. Open the license lookup, enter the number or the business name, and read four things: status, classifications, bond and workers' comp. The status should say active, and the classifications should match the work. Ours is CSLB #942404, and it lists both C-10 and C-36.

A+ Electric & Plumbing is a licensed electrician and plumber serving Los Angeles and the San Fernando Valley, and every written estimate we hand over names the permit, the agency and who meets the inspector. When we pull the permit, passing inspection is our job, and the correction list is ours to fix.

What do inspectors look at on the rough and the final?

Most jobs get two visits. The rough inspection happens while walls, ceilings or trenches are still open. The final happens when everything works and the covers are on. A water heater or a panel swap often needs only the final.

On electrical work, the inspector checks what fails quietly. That means wire size against breaker size, grounding and bonding at the service, cable support, box fill and nail plates at the studs. At the final, the panel needs clear working space and a legible circuit directory, plus AFCI and GFCI protection where the California Electrical Code calls for it. Our panel upgrade page walks through that visit step by step.

A water heater final is a list most inspectors can recite. They want two seismic straps, one high on the tank and one low. They want a relief valve with a full-size discharge pipe that runs to an approved spot, usually outside, and ends pointing down near the ground. The vent has to rise and draft, and the gas line needs a shutoff and a sediment trap. The full list is on our water heater installation page.

Rough plumbing gets a test. Drains and vents hold water or air while the inspector looks at slope, vent routing and materials, and gas piping holds pressure on a gauge. On a remodel this visit matters most, because tile and drywall go up right after it. Our remodel plumbing crew books it ahead of the tile setter's start date, not after.

LADBS inspectors also glance at smoke and carbon monoxide alarms on most finals, and a missing hallway alarm can hold up the sign-off.

Where do LADWP and SoCalGas come in?

The permit covers your side of the meter. The utility owns the other side, and some jobs need both to line up. LADWP serves power and water inside the City of Los Angeles, and SoCalGas serves gas across the region.

A service upgrade is the clearest example. Before the work, LADWP approves where the meter will sit, a step the trade calls the meter spot. It matters on older houses where the meter hides inside a fenced side yard or sits too close to the gas meter. On the work day, the utility drops power, we change the equipment, and power returns once the utility and the inspector have what they need. The order varies by job, so we book the appointment and the permit together.

Hillside homes in Tujunga and Studio City add lead time, since long overhead drops and underground feeds take more planning. Summer heat waves add more, when half the Valley wants a bigger service at once.

Gas follows a similar split. We size and run the house piping under a plumbing permit, and the inspector witnesses the pressure test. If the new load exceeds what the meter can deliver, SoCalGas handles the meter change as its own request.

What if the address is in Burbank, Glendale, Pasadena or Santa Monica?

Everything above describes electrical and plumbing permits in Los Angeles proper, and a Los Angeles mailing address does not always mean the City of Los Angeles. Burbank, Glendale, Pasadena and Santa Monica each run their own building department, with their own forms, inspectors and amendments to the state codes. San Fernando, Calabasas and Beverly Hills do too, and LADBS has no say in any of them.

The utilities change as well. Burbank Water and Power, Glendale Water and Power and Pasadena Water and Power handle the meter side in their cities. Santa Monica and most unincorporated pockets get power from Southern California Edison. A panel upgrade in Glendale therefore means a Glendale permit and a Glendale utility appointment. The same job in Eagle Rock, two miles away, goes through LADBS and LADWP.

Unincorporated areas such as La Crescenta-Montrose and Altadena answer to Los Angeles County Public Works, through its Building and Safety Division. We check which desk applies before we write the estimate.

The fastest test is the online permit record search at LADBS. If your parcel comes up, the job belongs to the city. If it does not, start with your own city hall, or with the county for an unincorporated address.

What does unpermitted work cost you later?

Skipping electrical and plumbing permits in Los Angeles rarely causes trouble on the day. The trouble arrives years later, usually at one of three moments.

• At the sale. California sellers have to disclose work they know went in without a permit, and a buyer's inspector spots a new panel or a relocated water heater with no record behind it.
• At a claim. After a fire or a flood, an insurer looks for the cause, and unpermitted wiring or piping nearby gives the adjuster a reason to push back.
• At the next permit. An inspector on site for a new job can spot old work with no record and write it up.

Legalizing old work costs more than the permit would have. The inspector needs to see what the wall hides, so finished drywall and tile come off. The work then has to meet the code in force today, not the code from the year someone did it. We see it most with garage conversions in Van Nuys and North Hollywood, where a bathroom and a subpanel went in over a weekend decades ago.

Holding both licenses pays off for the owner on exactly those jobs. A conversion, a bathroom or a heat pump water heater touches wiring and piping at once. With C-10 and C-36 on one license, one office files both permits, books both inspections and answers for both correction lists, so nobody points at the other trade.

Start with our Los Angeles electrician team or our Los Angeles plumber team, and the permit side comes with the job. A real person picks up (818) 421-5290 at any hour, and the written estimate is free.

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