100–200 amp panel upgrades & breaker box replacement in Walnut Creek, Contra Costa County. Local electricians, upfront pricing and fast scheduling.
(833) 652-8933 Request a quoteOlder homes in Walnut Creek were wired for a different era. Add an EV charger, a heat pump, an induction range or an ADU and a 100 amp panel runs out of room fast. Phasethree Electric handles electrical panel upgrades in Walnut Creek from permit to final inspection, including 100 amp to 200 amp service upgrades, breaker box replacement, fuse box replacement and sub panel installation.
Breakers that trip when two appliances run, warm or buzzing panel covers, a fuse box instead of breakers, no open slots, rust or scorch marks, or a brand with a known failure history such as Federal Pacific, Zinsco or Sylvania. Insurance carriers and buyers in Contra Costa County often flag these panels during a sale.
New main breaker panel, new grounding and bonding to current code, labeled circuits, meter socket and service entrance work coordinated with the utility, permit and city inspection. Where you want to keep the existing panel we can add a sub panel for a garage, workshop, ADU or EV charger.
Cost depends on amperage, whether the meter and service entrance need replacing, and how the utility feeds the property. We give a fixed written price after a short on-site evaluation. Call (833) 652-8933 to schedule one in Walnut Creek or nearby Lafayette, Alamo, Moraga, Pleasant Hill.
We provide electrical panel upgrade throughout Walnut Creek and the surrounding communities of Contra Costa County.
Most residential panel replacements are completed in a single day, with power off for roughly four to eight hours.
Yes. Panel replacements in Walnut Creek require an electrical permit and inspection. We pull the permit and meet the inspector.
For nearly every home in Walnut Creek, yes. 200 amp service comfortably supports a Level 2 EV charger, solar back-feed, heat pump and a modern kitchen.
“Tesla Wall Connector installed in the garage in a couple hours. Clean conduit run, app set up, and they showed me how to schedule off-peak charging.”
Samantha L.“Called at 11pm with sparks from a bathroom outlet. Someone was here within the hour and made it safe, then came back in the morning to finish.”
Priya S.“Smart switches finally work because they added neutrals at every box. Should have called them first instead of trying myself.”
Nina P.Upfront pricing · Same-day service · 24/7 emergency response