Electrical Panel Upgrade in Half Moon Bay, CA
100 to 200 amp service upgrades, breaker box replacement and subpanels for modern loads. Serving Half Moon Bay and San Mateo County.
Open 24 hours, 7 days a week — flat price quoted before work starts
Service directory — Half Moon Bay
MAIN 200AElectrical Panel Upgrade in Half Moon Bay, CA
A lot of Half Moon Bay houses are still running the panel they were built with, on a service sized for one window AC and a black-and-white television. Add an EV, a heat pump and an induction range and that panel is out of room and out of capacity.
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 | Half Moon Bay and San Mateo County, California |
What we cover
Electrical Panel Upgrade work we handle for Half Moon Bay homes and businesses.
- Zinsco, Federal Pacific and Challenger panel replacement
- Grounding and bonding brought up to current code
- AFCI and GFCI breaker upgrades
- 100 amp to 200 amp service upgrades
- Whole-house surge protection added at the panel
- Fuse box to modern breaker panel conversion
- 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 Half Moon Bay
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.
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 Half Moon Bay jobs.
Half Moon Bay coverage
Electrical Panel Upgrade across Half Moon Bay and the towns around it.
Panel upgrade near Half Moon Bay
Other work in Half Moon Bay
Reviews from San Mateo County
Smart switches wouldn't work because there was no neutral. They pulled one, got everything on Lutron, and set up the scenes before leaving.
Chantal P.Smart home wiring · Half Moon BayWarehouse high bay retrofit to LED. Did it over a weekend so we never stopped shipping, and the place is twice as bright.
Greg L.Warehouse lighting · Half Moon BayHot tub circuit and disconnect. Permit, inspection, everything. Showed up when they said and cleaned up after.
Owen H.Hot tub wiring · Half Moon BayElectrical Panel Upgrade in Half Moon Bay — questions
How much does an electrical panel upgrade cost in Half Moon Bay?
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.
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 Half Moon Bay?
Yes, service work is permitted and inspected. We pull the permit, schedule the inspection and meet the inspector so you don't have to.
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.
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.
Book panel upgrade in Half Moon Bay
Call and speak to a dispatcher now, or send the details and we will come back with a time and a price.