Cost guide
Electrical panel upgrade cost in California
What a 200 amp service upgrade actually runs in Riverside and San Bernardino counties, what moves the price, and how to tell whether you need one.
These are market ranges, not a quote. What a panel upgrade costs turns on things nobody can see from a phone call: whether the utility service changes, what the inspector finds behind the panel, and how far the new run has to go. We price it after looking at it.
What a panel upgrade costs
Most homes in this area land between three and six thousand dollars for a 200 amp service upgrade, permit and inspection included. The spread is wide because two jobs that sound identical on the phone rarely are.
| Scope | Typical range | What it covers |
|---|---|---|
| Panel swap, same size | $1,800 – $3,000 | New panel and breakers on the existing service, no utility change |
| 100 to 200 amp upgrade | $3,000 – $5,500 | New panel, service conductors, meter socket, permit and inspection |
| Upgrade with mast or trench | $5,000 – $8,500 | As above plus an overhead mast replacement or an underground run |
| Sub-panel added | $900 – $2,200 | Feeding a garage, workshop or addition from the main |
What moves the price
Four things account for most of the difference between a quote at the bottom of that range and one at the top.
Whether the utility service changes
Swapping the panel alone is a day of work. Going from 100 to 200 amps means new service conductors, a new meter socket and a coordinated shutdown with the utility. That coordination is often the longest part of the job even though it is not the most expensive.
Overhead or underground
An overhead service usually needs a new mast and weatherhead at the upgrade. Underground means trenching, and trenching through established landscaping or a driveway costs more than trenching across dirt.
What the inspector finds
A panel upgrade brings the service up to current code, and inspectors in both counties look at bonding, grounding electrodes and the condition of what feeds out of the panel. Older homes often need a ground rod pair and a water bond added. That is a few hundred dollars rather than a few thousand, but it is rarely in a phone estimate.
Where the panel goes
Moving a panel out of a bedroom closet, which is no longer permitted, to an exterior wall adds a day and the cost of extending every circuit to the new location.
Signs you need one
- Fuses rather than breakers. A fuse box is a service upgrade, not a repair.
- A Federal Pacific, Zinsco or Challenger panel. These have a documented history of breakers failing to trip, and most insurers now ask about them.
- No room left. If every slot is full, or tandem breakers are doing work they were not meant to, adding anything means upgrading first.
- Breakers tripping under normal load. Not a nuisance, a signal that the service is undersized for how the house is actually used.
- You are adding an EV charger, a heat pump or solar. Any one of those can push a 100 amp service past what it can carry.
- Rust, heat marks or a burning smell at the panel. Stop using it and call someone the same day.
How long it takes
The work itself is one to two days. The schedule around it is longer: a permit takes a few days to a week depending on the jurisdiction, and the utility disconnect has to be booked. Plan on two to three weeks from signing to final inspection, and expect to be without power for four to eight hours on the day.
Permit and inspection
A service upgrade always needs a permit in California. We pull it, we meet the inspector, and the job is not finished until it passes. An unpermitted panel upgrade surfaces at resale, and correcting one after the fact costs more than doing it properly the first time.
Common questions
Can I upgrade the panel without upgrading the service?
Yes, and it is a common job. If your 100 amp service is genuinely adequate but the panel itself is failing or full, a like-for-like swap into a larger enclosure gives you more circuits without touching the utility side. That is the cheapest version of this work.
Do I actually need 200 amps?
Not automatically. A modest home with gas heat, gas water heating and no EV runs comfortably on 100 amps. The moment you add a Level 2 charger, an electric range, a heat pump or a second air conditioner, the calculation changes. We run a load calculation rather than guess.
Will my power be off all day?
Four to eight hours on the day of the swap for most jobs. We book the utility disconnect first thing so the house is back on by the afternoon.
Is a permit really necessary?
For a service change, yes, in every jurisdiction we work in. Beyond the legal point, an unpermitted upgrade is a problem at resale and can affect an insurance claim after an electrical fire.
Does a panel upgrade add value to the house?
It rarely returns its cost the way a kitchen does, but it removes an objection. An inspector flagging a Federal Pacific panel or a full 100 amp service can hold up a sale or trigger a price reduction larger than the upgrade would have been.
Want a real number for your job?
Tell us what you have and we will come back with a written quote.