200 Amp Panel And Main Breaker
A UL listed 200 amp enclosure with a 40-space bus and a new main breaker, sized to your calculated load. We stock Square D, Eaton, and Siemens panels so we are not waiting on a special order.
Licensed
Licensed & Bonded
Fully Insured
Insured & Bonded
24/7 Emergency
Same-Day Response
Professional Electrical Services
Quality-Focused Service in San Mateo
What A 200 Amp Panel Upgrade Includes
Every 200 amp panel upgrade we install in San Mateo covers the panel, the breakers, the permit, the labor, and the inspection. If your service needs something beyond a standard swap, like a new meter socket or a grounding electrode, we price it upfront so there is no change order halfway through the job.
All Branch Circuit Breakers
New circuit breakers for every circuit in the house, including GFCI and AFCI protection where current code requires it. Old breakers do not get reused on a new bus, even if they still look fine.
City Permit And Inspection
We pull the electrical permit from the City of San Mateo and meet the inspector on site for both rough and final. You get the signed inspection card and permit number when the job closes.
PG&E Disconnect And Reconnect
We schedule the utility disconnect, coordinate the meter pull, and handle the reconnect once the inspection passes. You do not sit on hold with PG&E to make any of it happen.
Grounding And Bonding
New grounding wire, grounding electrode conductor, and bonding on the water and gas lines to meet NEC code compliance. Undersized or missing grounding is one of the most common problems we find on older San Mateo services.
Labeling And Testing
Every breaker labeled by room and load, then we test voltage at the panel with a multimeter and confirm each circuit under load before we leave. You get a walkthrough of the finished panel.
What A 200 Amp Panel Upgrade San Mateo CA Involves
A 200 amp panel upgrade San Mateo CA means swapping your existing electrical panel enclosure and main breaker for a 200 amp assembly rated to carry roughly twice the amperage of a standard 100 amp service. We kill power at the meter, pull the old panel, mount the new one, land the service conductors on new lugs, rebuild every branch circuit on fresh circuit breakers, and torque each termination with a torque screwdriver to the manufacturer spec printed on the label. Then the city inspects it.
Most San Mateo homes built before 1970 still run on 100 amp service sized for a few lights and a refrigerator. Add a heat pump, an induction range, a 48 amp EV charger, and a tankless water heater and that old service is maxed out. If you have been searching for a 200 amp panel upgrade in San Mateo CA near me, the telltale signs are tripping circuit breakers, a warm electrical panel, and flickering lights when the HVAC kicks on.
How Our 200 Amp Panel Upgrade Process Works
Every job follows the same five steps, whether it is a straightforward swap in a Burlingame ranch house or a 100 amp to 200 amp panel upgrade San Mateo project with a meter main relocation. Here is exactly what happens, and how long each stage takes.
01
Schedule
Call or book online — a real human picks up and confirms a 2-hour arrival window.
02
Diagnose
Licensed tech inspects on-site, then walks you through the cause and your options.
03
Fix
The job is completed to code and done right the first time — no shortcuts, no surprises.
04
Project Completion
Every job backed by a written workmanship warranty — and we stand behind it.
Tools And Methods We Use
Tools & Equipment
Clamp Meter
Measures actual current on each circuit under load so we can confirm the real demand before sizing the new service. It also catches a circuit drawing more than its breaker rating.
Torque Screwdriver
Every lug and breaker terminal gets tightened to the inch-pound value printed on the panel label. Under-torqued lugs are the number one cause of heat at a panel.
Voltage Tester
Confirms zero voltage at the panel before we touch a conductor, and verifies correct voltage on each circuit after power up.
Panel Knockout Punch
Cuts clean, round openings for conduit and cable entries so the enclosure keeps its UL listing and the inspector has nothing to flag.
Fish Tape And Hole Saw
Runs new circuits through finished walls with minimal drywall damage, which matters in San Mateo homes where the walls are often plaster.
Circuit Breaker Finder
Maps which breaker controls which outlet before we start, so the labeling on the new panel is accurate instead of guesswork.
Methods & Standards
NEC Load Calculation
We calculate the service load using the NEC method, counting general lighting, small appliance circuits, and the actual nameplate ratings of your range, dryer, HVAC, and EV charger. That number decides whether 200 amps is right or whether you need more.
NEC Code Compliance
Grounding electrode requirements, AFCI and GFCI protection, working clearance, and conductor sizing all get checked against the current NEC edition adopted by San Mateo. Code-correct is the baseline, not an upgrade.
UL Listed Equipment Only
Every panel, breaker, and lug we install carries a UL listing. Unlisted components void the panel's rating and give an inspector a reason to red-tag the job.
OSHA Safety Standards
Service work means live-adjacent conditions and ladder work. We follow OSHA standards for lockout, PPE, and fall protection on every job, including overhead service drops.
When San Mateo Homes Need 200 Amp Service
01
A 1940s bungalow near Downtown San Mateo adding a heat pump and induction range on the original 100 amp service.
What we do: We run a load calculation that includes the new appliances, pull the permit, and install a 200 amp panel with dedicated 240 volt circuits for both. The old fuse box comes out at the same time.
→ The homeowner runs the heat pump and the range together without a single trip, and the panel has open spaces for whatever comes next.
02
A family in Beresford buying their first EV and needing a Level 2 charger installed in the garage.
What we do: We upgrade the service to 200 amps and add a 60 amp charger circuit on its own breaker, with the conduit run along the garage wall rather than through the finished ceiling.
→ Charging at full speed overnight with the dryer and AC running, no load management device needed.
03
A Hillsdale duplex owner converting a garage into an ADU with its own kitchen and laundry.
What we do: We upgrade the main service to 200 amps and install a subpanel for the ADU, running a feeder from the main panel and landing separate circuits for the range, water heater, and laundry.
→ Both units have independent, code-compliant power, and the ADU passes its own inspection without touching the main panel again.
04
A San Mateo Park homeowner whose panel is warm to the touch after a winter storm surge.
What we do: We inspect the service the same day, find a burned main lug, and replace the panel with a 200 amp assembly rather than repairing a bus bar that has already been heat-damaged.
→ The heat is gone, the connections are new, and the service is documented and inspected for the next insurance review.
How 200 Amp Upgrades Run In San Mateo
San Mateo sits in a marine climate, and that shapes panel work here. Fog and salt air off the Bay corrode meter sockets and service lugs faster than inland cities, so we inspect the meter base on every job, not just the panel. The building stock matters too: much of the city was built between 1920 and 1965, which means 100 amp service, two-wire branch circuits, and grounding electrodes that were never installed. We see knob-and-tube in the older blocks near Downtown and aluminum branch wiring in some 1960s tracts, and both change how a 100 amp to 200 amp panel upgrade San Mateo project gets wired. Permits come from the City of San Mateo, and PG&E handles the disconnect, so scheduling runs 5 to 10 business days out. If you need a 200 amp electrical service upgrade San Mateo open now because the main breaker will not hold, call us and we will get eyes on it the same day.
Neighborhoods We Serve
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San Mateo Park
Mostly 1920s to 1940s homes with original 100 amp service and plaster walls. We plan circuit runs around the plaster to keep patching minimal.
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Beresford
Post-war ranch houses on slab, often with the panel in the garage. Easy panel access, but grounding electrodes are frequently missing and need to be added.
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Hillsdale
A mix of single-family homes and small multi-unit buildings. Duplexes here often share one undersized service, which we split with a subpanel.
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Downtown San Mateo
Older housing stock close to the Bay, where salt air corrosion on meter sockets and service drops is common and gets checked on every visit.
Local Conditions We Plan For
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Salt air corrosion near the Bay
Meter sockets, lugs, and overhead service conductors corrode faster here than inland. We inspect and often replace the meter base during the upgrade rather than reusing a corroded one.
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Pre-1965 homes with 100 amp service
Most of these panels have no spare spaces and undersized grounding. The upgrade includes new grounding and bonding, which is often the part that fails inspection on older homes.
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Plaster walls in older neighborhoods
Running new circuits through plaster takes longer and makes more dust than drywall. We use fish tape and plan runs to limit patching, and we protect floors and furniture before we start.
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Winter storm surges
Storm-related power surges damage main breakers and bus bars on older panels. We see a spike in emergency calls after the first big storms each fall, usually for a main breaker that will not reset.
100 Amp To 200 Amp In Beresford
Problems A 200 Amp Upgrade Solves
Most panels we replace in San Mateo were not defective. They were simply sized for a household that no longer exists. Here are the four problems we hear about most, and what a 200 amp service does about each one.
Problem
Main breaker trips when large appliances run together
You reset the breaker, lose power to half the house, and risk damaging the refrigerator, computer, or furnace control board each time it happens.
Our Fix
We run a load calculation, confirm the service is undersized rather than faulty, and install a 200 amp panel with the capacity to carry your real demand. Nuisance trips stop because the panel finally matches the load.
Problem
Warm panel and flickering lights
Heat at the panel means resistance at a connection, usually a loose lug or corroded bus bar. Left alone, that heat is how panel fires start.
Our Fix
We inspect every termination with a clamp meter under load, then replace the panel and rebuild the connections on new lugs and a new neutral bar. Corroded panel connections do not get reused.
Problem
No capacity left for an EV charger
A 48 amp charger on a 100 amp service leaves almost nothing for the rest of the house, so the charger gets dialed down or never installed at all.
Our Fix
A 200 amp panel upgrade for EV charger San Mateo California projects gives the charger its own 60 amp circuit with room to spare. We size the service around the charger, not the other way around.
Problem
Fuse box or outdated 100 amp service
Screw-in fuses, no AFCI protection, and undersized grounding fail modern code and complicate any home sale or insurance renewal.
Our Fix
We replace the fuse box or 100 amp panel with a full 200 amp service, bring grounding and bonding to current code, and leave you with a permitted, inspected panel that passes any buyer's inspection.
Why San Mateo Homeowners Upgrade To 200 Amp Service
A 200 amp service does more than stop the breaker from tripping. It gives you headroom for the appliances you already own and the ones you will add next, and it brings the whole service up to current NEC code compliance.
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Capacity For EV Charging
A Level 2 charger pulls 40 to 48 amps continuous. On a 100 amp panel that is most of your service. A 200 amp panel upgrade for EV charger San Mateo California projects leaves room for the charger, the dryer, and the range to run at once without nuisance trips.
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Ends Nuisance Tripping
If your main breaker trips when the oven and microwave run together, the panel is undersized, not faulty. Moving to 200 amps gives every circuit the amperage it was designed for, so breakers stop doing the job they were never meant to do.
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Cleaner, Safer Connections
Old panels develop corroded panel connections, pitted bus bars, and aluminum wiring that has loosened under screw terminals. We land new copper conductors on fresh lugs and a new neutral bar, which removes the heat buildup that causes most panel fires.
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Room To Add Circuits
A 200 amp panel gives you 40 breaker spaces instead of 20. That is room for a subpanel in the garage, a dedicated circuit for a heat pump, and a 240 volt circuit for a future shop tool without daisy-chaining anything.
Licensed, Permitted, Inspected
Licensed & Certified
- California C-10 Electrical Contractor License — issued by California Contractors State License Board
- NEC Code Compliance — issued by National Fire Protection Association
- UL Listed Equipment — issued by Underwriters Laboratories
- OSHA Safety Standards — issued by Occupational Safety and Health Administration
- City of San Mateo Electrical Permit — issued by San Mateo Building Department
Verified Reviews
Google ★★★★★4.9
Quoted our 200 amp upgrade on a Tuesday, installed it the following week once PG&E scheduled the disconnect. Panel is labeled, the inspector passed it first time, and the price did not move from the quote.
Yelp ★★★★★4.8
Called about a warm panel and a main breaker that kept tripping. They came out the same day, found a burned lug, and had a new 200 amp panel in by the end of the week. Straight answers the whole way.
BBB ★★★★★4.9
We needed capacity for an EV charger and a heat pump. They ran the load calculation, told us 200 amps was enough, and did not try to sell us a bigger service. Clean install, permit handled, no mess left behind.
Google ★★★★★5.0
Duplex service split with a subpanel for the back unit. They kept both tenants informed, worked around parking, and had power back on the same evening. Would use them again for the next property.
Panel Upgrade Expertise You Can Verify
Our electricians hold California C-10 electrical contractor licensing and work to NEC code compliance on every job, from a simple 200 amp panel replacement San Mateo California homeowners need for an EV charger to full service upgrades with meter main relocation. We have rebuilt services in pre-war bungalows in San Mateo Park, mid-century tracts in Beresford, and newer builds near Hillsdale. That range matters: knob-and-tube wiring, aluminum branch circuits, and undersized grounding electrodes all show up in this city, and each one changes how the upgrade gets done. We carry UL listed equipment from Square D, Eaton, and Siemens, and we pull permits on every job.
- Licensed California C-10 electrical contractor, bonded and insured for residential service work
- Every install inspected by the City of San Mateo before PG&E restores the meter
- UL listed panels and breakers from Square D, Eaton, Siemens, and Leviton
- NEC code compliance including grounding electrode and bonding requirements
- Written warranty on panel installation and workmanship
Frequently Asked Questions
Real answers to the questions we hear most often from local homeowners and property managers.
How much does a 200 amp panel upgrade cost in San Mateo CA?
Typical 2026 pricing in San Mateo runs $2,800 to $5,500 for a standard 200 amp panel upgrade, including the panel, breakers, permit, labor, and inspection. Overhead service drops, meter main relocation, or a new grounding electrode push it toward the top of that range. Underground service or a long conductor run can add more. We give you the exact number after a load calculation, not a phone estimate.
Do I need a 200 amp panel upgrade in San Mateo California?
You need one if your main breaker trips when two large appliances run together, if your panel is warm or buzzing, or if you are adding an EV charger, heat pump, or induction range to a 100 amp service. Homes built before 1970 in San Mateo almost always qualify. A quick load calculation tells you for certain, and we do that free on site.
Who installs 200 amp electrical panels near me in San Mateo?
We do. San Mateo Panel Pros is a licensed California C-10 electrical contractor working out of San Mateo and serving San Mateo County, including Belmont, Burlingame, San Carlos, Millbrae, Redwood City, and San Bruno. We pull the permit, coordinate PG&E, install the panel, and walk the inspection. Call +1 (650) 372-5030 to schedule.
How long does a 200 amp panel upgrade take in San Mateo CA?
The install itself takes 6 to 8 hours with a two-person crew, so most homes are back on power the same day. Add 5 to 10 business days ahead of that for the permit and PG&E disconnect scheduling. If we find a corroded meter socket or need a new grounding electrode, plan on one extra day. We give you the full timeline in writing before we start.
Related Services
Electrical Panel Replacement
If your existing 200 amp panel has failed, we replace it like-for-like without upsizing the service. Same permit process, same inspection, usually a single-day job for San Mateo homeowners.
View Electrical Panel ReplacementElectrical Panel Repair
Not every problem needs a new panel. We repair failed main breakers, burned bus bars, and loose lugs on existing services, and we tell you honestly when a repair will not hold and an upgrade is the better spend.
View Electrical Panel RepairFuse Box Replacement
Older San Mateo homes still running screw-in fuse boxes get a full modern replacement. We remove the fuse block, install a breaker panel, and bring the grounding and bonding up to current code at the same time.
View Fuse Box ReplacementSubpanel Installation & Upgrades
A 200 amp main panel often pairs with a garage or ADU subpanel. We run the feeder, set the subpanel, and land the circuits so your shop, EV charger, or backyard unit has its own dedicated breakers.
View Subpanel Installation & UpgradesCall San Mateo Panel Pros
Call (650) 372-5030 or email [email protected] and we will get you on the schedule. We answer the phone Monday through Friday, 8am to 6pm, and we run emergency panel calls 24/7. Same-day estimates are standard. If your panel is warm or a breaker will not reset, call now rather than waiting.
San Mateo Panel Pros
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Phone
+16503725030 -
Address
7 37th Ave, San Mateo, CA 94403, USA
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Hours
Mon–Fri: 7AM – 7PM
Sat: 8AM – 4PM
Sun: Emergency Only
24/7 Emergency Available