Sub-Panels & Whole-House Surge Protectors in LA: What to Know

Two upgrades come up again and again when Los Angeles homeowners add circuits or protect their electronics: a sub-panel and a whole-house surge protector. Here’s when each makes sense and what drives the cost.

What Is a Sub-Panel?

A sub-panel is a smaller breaker panel fed from your main panel that adds circuit capacity for a specific area — a garage, addition, ADU, workshop, or a power-hungry space like a kitchen or home gym. It’s often the right answer when your main panel is out of breaker space but doesn’t need full replacement.

You may need a sub-panel if you’re:

• Building an ADU, garage conversion, or addition
• Adding an EV charger, hot tub, or workshop circuits
• Out of spaces in your main panel

What Affects Sub-Panel Cost

Every job is different, but the main factors are the distance from the main panel, the amperage you need, the wiring run and access, and any panel or service upgrades required to support the added load. Permits and inspection are part of the job in Los Angeles. A licensed electrician will size it correctly and give you an itemized estimate.

Whole-House Surge Protection

A whole-house surge protector installs at your panel and clamps down voltage spikes before they reach your circuits. Unlike a power strip, it protects everything — HVAC, appliances, EV chargers, and electronics — from surges caused by grid switching, lightning, or large motors cycling on and off.

Given how much expensive electronics the average LA home now runs, it’s an inexpensive layer of protection that often pays for itself the first time it does its job. It’s frequently added during a panel upgrade.

Talk to a Licensed Electrician in Los Angeles

911 Construction & Electric is a licensed, bonded, and insured electrical contractor (CA Lic. #1027421). Whether you need a sub-panel for a new project or surge protection for the whole home, contact us for a free estimate or call 747-255-8595.