Electrical Panel Upgrade in Claremont, CA
100 to 200 amp service upgrades, breaker box replacement and subpanels for modern loads. Serving Claremont and Los Angeles County.
Open 24 hours, 7 days a week — flat price quoted before work starts
Service directory — Claremont
MAIN 200AElectrical Panel Upgrade in Claremont, CA
Panel upgrades are the job that unlocks everything else. In Claremont and across Los Angeles County, most requests for EV charging, heat pumps or ADU power start with a service upgrade from 100 amps to 200, because there is simply nowhere left to land a new breaker.
Call (833) 652-8933 and describe what is happening. If it is a same-day job we will book it today, and if it needs a site visit to quote properly we will tell you that too.
| Typical service size | 200A residential, 400A for large homes and small commercial |
|---|---|
| Panel spaces gained | Commonly 20 to 42 breaker spaces after upgrade |
| Time on site | Most residential upgrades finish in one day |
| Included | Permit, utility disconnect coordination, inspection, grounding upgrade |
| Service area | Claremont and Los Angeles County, California |
What we cover
Electrical Panel Upgrade work we handle for Claremont homes and businesses.
- Whole-house surge protection added at the panel
- Fuse box to modern breaker panel conversion
- Subpanel installation for garages, shops and ADUs
- Grounding and bonding brought up to current code
- Zinsco, Federal Pacific and Challenger panel replacement
- 100 amp to 200 amp service upgrades
- Meter main combo and service entrance replacement
- Load calculations for EV, HVAC and solar additions
Not sure which you need?
Describe the symptom and we will tell you what it usually means. Most callers get a straight answer in a couple of minutes, and about a third of the time it turns out to be smaller than they expected.
Situations we see in Claremont
Adding an EV, heat pump or ADU
All of these need a load calculation. If existing demand plus the new load exceeds your service, the upgrade comes first.
No space left in the panel
Double-tapped breakers and tandem cheaters are a sign the panel is full. A 200 amp replacement gives you 40 or more spaces and room for the next ten years.
Zinsco or Federal Pacific panel
These breakers have a documented history of failing to trip under fault. Replacement is the only real remedy, and it is one of our most common Claremont jobs.
Panel is rusted or wet
Water in an enclosure corrodes bus stabs and creates high-resistance connections. Once rust reaches the bus, the panel is done.
Claremont coverage
Electrical Panel Upgrade across Claremont and the towns around it.
Reviews from Los Angeles County
Our restaurant lost the walk-in circuit on a Friday. They came out after close, traced it to a failed feeder lug, and we opened Saturday on time.
Ken A.Commercial repair · ClaremontTesla Wall Connector in the garage, clean conduit run, done in an afternoon. They talked me out of a panel upgrade I didn't actually need.
Devon W.EV charger · ClaremontKitchen breaker kept popping whenever we ran the microwave and kettle. They put in a dedicated circuit instead of just telling us to use one appliance at a time.
Alicia G.Dedicated circuit · ClaremontElectrical Panel Upgrade in Claremont — questions
Do I really need 200 amps?
If you are adding EV charging, electric heat, a hot tub or an ADU, almost certainly. We run an actual load calculation rather than guessing, and if 100 amps genuinely still works we will tell you.
Do I need a permit for a panel upgrade in Claremont?
Yes, service work is permitted and inspected. We pull the permit, schedule the inspection and meet the inspector so you don't have to.
How much does an electrical panel upgrade cost in Claremont?
Cost tracks the service size, the condition of the service entrance and whether the meter has to move. A straight 100 to 200 amp swap sits well below a job that needs a new mast and underground feed. Call (833) 652-8933 and we will walk your panel and quote a flat number.
How long will my power be off during the upgrade?
Plan on most of a working day. We coordinate the utility disconnect and reconnect so the outage lands in one block rather than spread over days.
Can you replace just the breakers instead of the whole panel?
Sometimes. On a sound modern panel, breaker replacement is fine. On a Zinsco, Federal Pacific or corroded enclosure, new breakers don't fix the bus, so the panel gets replaced.
Book panel upgrade in Claremont
Call and speak to a dispatcher now, or send the details and we will come back with a time and a price.