Main Panel Upgrade Cost in Los Angeles (2026): 100A to 225A
Straight answer: a panel swap in place on the same or larger service usually runs about $1,500–$4,000 in Southern California. Add a new utility service drop, meter, or mast and it’s roughly $4,000–$8,000+; a full job with trenching or underground service can reach $8,000–$15,000+. Below: a cost table by scope, amperage targets, and cheaper alternatives.
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- A straight panel swap in place — same or larger service, no utility work — usually runs about $1,500–$4,000 in Southern California.
- If the utility has to get involved (new service drop, meter, or mast), budget roughly $4,000–$8,000+; a full job with trenching or underground service can reach $8,000–$15,000+.
- The common target is 100A → 200A; a 225A busbar is the solar-ready sweet spot. This article is about what it costs — whether you actually need one is a separate question we answer here.
Cost, not “do I need one”
Two different questions get tangled together. Whether solar or an EV charger forces a panel upgrade is about code, busbar ratings, and load calculations. This page is the companion: once you know you need one, what does a main panel (service) upgrade actually cost in Los Angeles in 2026? The honest answer is “it depends on how far the wire goes” — so we break it down by scope below.
The one thing that moves the price: does the utility have to touch it?
A panel upgrade sounds like one job, but there are really three sizes of it. The cost jumps each time the work crosses a boundary — from your wall, to the meter, to the utility’s wire. Swapping the breaker box by itself is a day of electrician labor. The moment LADWP or SCE has to disconnect and re-connect a heavier service drop, set a new meter, or you need a taller mast/weatherhead, you add utility coordination, more permits, and lead time. And if the service is underground or has to be relocated, trenching turns it into a small construction project.
| Scope of work | Typical range | What’s involved |
|---|---|---|
| A. Panel / breaker-box swap in place Same or larger service | $1,500 – $4,000 | New panel and breakers on the existing wall, existing meter and service drop reused. Mostly electrician labor plus a city permit. |
| B. Panel + utility service upgrade New drop / meter / mast | $4,000 – $8,000+ | Everything in A, plus a new meter base, a taller mast & weatherhead, and the utility swapping the overhead service drop. Adds utility coordination and lead time. |
| C. Full service upgrade Trenching / underground / relocation | $8,000 – $15,000+ | Underground service, trenching & conduit, or moving the panel to a new location. Trenching alone runs roughly $5–$12 per foot before conduit, wire, and repair. |
Ranges reflect Southern California figures and are approximate; sources: HomeGuide · Angi · HomeCostLab. Your quote can land outside these for good reasons — a hard-to-reach panel, tricky AHJ, or aluminum feeders all move the number.
100A → 200A is standard; 225A busbar is “solar-ready”
Most older LA homes are on 100A service; the usual upgrade is to 200A, which comfortably handles a modern home with AC and an EV charger. For solar, the detail that matters is the busbar, not just the main breaker. A panel with a 225A busbar and a 200A main leaves more room under the NEC 120% rule for backfed solar — under a common opposite-end load-side calculation, roughly (225 × 1.2) − 200 = 70A of additional source-breaker rating versus about 40A on a straight 200/200 panel. That is not automatically the inverter’s continuous AC output — final capacity depends on breaker sizing, equipment listing, bus arrangement, your applicable NEC edition, and your AHJ/utility, and your equipment configuration; final approval depends on code review.
What drives your number up or down
Existing service size
Going 100A→200A is routine. Jumping to 400A, or feeding a home that never had adequate service, means heavier wire and often utility work.
Utility involvement
The single biggest jump. A same-service swap stays on your side of the meter; a heavier service drop, meter, or mast pulls LADWP or SCE into the schedule.
Panel location
An easy garage-wall panel is cheap to reach. A panel buried behind finishes, on a second story, or far from the meter adds labor and sometimes a sub-feed.
Overhead vs underground
Overhead is the simpler, cheaper job. Underground — existing or a new conversion — means trenching, conduit, and yard repair.
City permit & AHJ
Every upgrade needs a permit and inspection. LA-area jurisdictions differ on fees and rules; a fussy AHJ adds cost and calendar time.
Extras uncovered
Once the panel is open, old aluminum feeders, a failing meter base, or grounding that no longer meets code can turn up — and they’re real, separate costs.
Lead time is part of the cost. A swap-in-place can often be permitted, done, and inspected quickly. As soon as the utility has to schedule a disconnect, set a new meter, or re-hang a drop, the calendar stretches — sometimes several weeks. If you’re pairing the upgrade with a solar install or a home EV charger, sequencing the panel first keeps the rest of the project from stalling.
Before you pay for an upgrade: cheaper alternatives
A full service upgrade isn’t always required. Depending on your loads and the code review, one of these may let you add solar, a battery, or an EV charger without a new service — sometimes for a fraction of the cost.
Line-side (supply-side) tap
Connects solar ahead of the main breaker, sidestepping the busbar’s 120% limit. Not always allowed with a meter-main combo, and some AHJs or utilities won’t permit it.
Main-breaker derate
Swap the main for a lower-rated breaker to free up busbar headroom for backfed solar — only works if your actual load stays comfortably below the new rating.
Smart / energy-management panel
A listed smart panel that sheds or staggers loads can help you add an EV charger (a load) without more service. It doesn’t automatically lift busbar limits for backfed solar (a source).
Which one fits — if any — comes down to your loads, panel, and a real code review. We walk through the “do I even need an upgrade” decision, load calcs and all, in do you need a main panel upgrade for solar?
A licensed electrical contractor, not a solar sales channel
A main panel upgrade is real electrical work — service disconnect, grounding, bonding, and utility coordination. Cali Energy holds a California C-10 electrical classification (CSLB #1032379), so the panel, the solar, and the EV circuit are pulled, permitted, and inspected under one licensed roof instead of subbed out and marked up. That also means the person quoting the job can look at your actual panel and tell you which of the three scopes above you’re really in — before you sign anything.
Get a real panel-upgrade quoteFrequently asked
How much does a main panel upgrade cost in Los Angeles?
It depends on scope. A panel swap in place on the same or larger service is typically about $1,500–$4,000 in Southern California. If the utility must supply a new service drop, meter, or mast, budget roughly $4,000–$8,000+. A full service upgrade with trenching, underground service, or relocating the panel can run $8,000–$15,000+. These are approximate 2026 figures; a site visit gives the real number.
What amperage should I upgrade to?
Many residential upgrades move from 100A to 200A — subject to the utility service, the calculated load and your project goals — which handles a modern home with AC and an EV charger. For solar, the busbar rating matters as much as the main breaker: a 225A busbar with a 200A main leaves more room under the NEC 120% rule for backfed solar — about (225 × 1.2) − 200 = 70A of additional source-breaker rating (not automatically the inverter’s continuous AC output). Whether you need it depends on breaker sizing, equipment listing, bus arrangement, your NEC edition, and AHJ/utility; final approval depends on code review.
Why is one panel-upgrade quote so much higher than another?
Usually because the two quotes are for different scopes. A same-service swap stays on your side of the meter; the price jumps when the utility has to set a new meter or drop, or when the service is underground and needs trenching. Panel location, city permit fees, and problems found once the panel is opened (old aluminum feeders, a failing meter base, outdated grounding) also move the number. Ask each provider which scope they’re quoting.
Can I add solar or an EV charger without a full panel upgrade?
Sometimes. Options include a line-side tap (connecting solar ahead of the main breaker), a main-breaker derate to free up busbar headroom, or a listed smart panel that manages loads. Each has limits — a smart panel helps with an EV charger (a load) but doesn’t automatically remove busbar limits for backfed solar (a source), and a line-side tap isn’t allowed everywhere. It comes down to your loads and a code review; we cover the decision in do you need a main panel upgrade for solar?
Does a panel upgrade need a permit, and how long does it take?
Yes — every service change needs a city permit and inspection, and LA-area jurisdictions differ on fees and rules. A swap-in-place can often be permitted and inspected quickly. Once the utility (LADWP or SCE) has to schedule a disconnect, set a new meter, or re-hang the service drop, add lead time — sometimes several weeks. Sequence the panel first if you’re pairing it with solar or an EV charger.
Is a panel upgrade included in a solar quote?
Usually not — it’s typically a separate line item, because not every home needs one. If your proposal assumes an upgrade, ask which of the three scopes it covers and see it itemized. A licensed C-10 electrical contractor can look at your actual panel and tell you whether you need one at all before you pay for it. See how it fits the overall solar cost picture.
Related reading
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Get a free estimatePrepared by Cali Energy, August 2026. This article is for general educational purposes only and is not legal, tax, financial, engineering, or utility advice. Rates, incentives, codes, permit requirements, equipment specifications, prices, and program terms may change; figures and timelines are estimates, not guarantees. Confirm current requirements with the applicable utility, AHJ, program administrator, manufacturer, or a licensed professional. See our Content Disclaimer. Cali Energy · 19201 Parthenia St Unit E, Northridge, CA 91324 · CSLB #1032379 (B, C-10, C-39)