New builds, additions & ADU electrical in Diablo, Contra Costa County. Local electricians, upfront pricing and fast scheduling.
(833) 652-8933 Request a quoteBuilders and homeowners in Diablo need an electrical contractor who shows up when framing is ready and passes inspection the first time. Phasethree Electric provides new construction electrical for custom homes, ADUs, additions, tract work and small commercial buildings across Diablo and Contra Costa County.
Temporary power, service and panel installation, complete branch circuit rough-in, low-voltage rough-in, fixture and device finish, testing and final inspection coordination with the City of Diablo.
Accessory dwelling units need a sub panel or separate service, kitchen and bath circuits, heat pump circuits and Title 24 lighting. We have wired ADUs across Contra Costa County and know the local requirements.
We help you plan lighting layouts, EV-ready garages, solar-ready panels and structured wiring before drywall so upgrades later are simple. Also serving nearby Danville, Alamo, San Ramon, Clayton. Call (833) 652-8933.
We provide new construction electrician throughout Diablo and the surrounding communities of Contra Costa County.
Yes. Send plans and we return a detailed electrical bid, usually within a few days.
Yes, including sub panel feeds from the main house or a separate service where required.
Yes, we pull electrical permits and schedule all inspections.
“They rewired our 1948 house room by room and we never lost power overnight. Walls were patched cleaner than we expected.”
Tom & Linda R.“Hot tub circuit and disconnect installed and inspected in a week. Everything was labeled and explained.”
Carlos D.“Our restaurant lost power on a Friday night. They had the failed contactor replaced and the walk-in back up before we lost any product.”
Angela M.Upfront pricing · Same-day service · 24/7 emergency response