If your current electrical panel is at capacity but you’re adding new appliances, remodeling, or building an addition, a subpanel might be the perfect solution. At Expert Electric Group, we provide expert subpanel installation and upgrade services for homes and commercial properties across Southern California.
Subpanels help distribute power safely and efficiently to different areas of your property — without the need for a full panel replacement.
When Do You Need a Subpanel?
- Adding a room, ADU, or garage
- Installing EV chargers or heavy appliances
- Upgrading your kitchen, bath, or outdoor area
- Separating circuits for workshops or offices
- Managing power in large commercial buildings
Our Services Include:
- Site evaluation and load assessment
- Proper sizing and placement of the subpanel
- Breaker and circuit installation
- Safe conduit and wire runs from the main panel
- Grounding, bonding, and code compliance
- Permit handling and inspection coordination
Benefits of Subpanels:
- Expand your system without upgrading the main panel
- Isolate power for additions, garages, or tenant units
- Improve system organization and safety
- Easier circuit management and future upgrades
Why Choose Expert Electric Group?
- Licensed, insured, and experienced electricians
- Transparent pricing and expert recommendations
- Clean, code-compliant installations
- Serving Los Angeles, Ventura, and surrounding areas
Localized Power: When your main panel is full but you need to add power to a garage, basement, or home addition, a subpanel is the most efficient solution. We install high-quality subpanels that allow for localized circuit control, reducing the need for long wire runs back to the main breaker and providing easier access to your switches.
Subpanel Installation Cost in Los Angeles
A 100-amp subpanel — the most common choice for garages, workshops, ADUs, and home additions — typically costs between $850 and $1,900 installed in the Los Angeles area. A 200-amp subpanel for larger additions or guest houses ranges from $1,100 to $2,700. Material costs (the panel box and breakers) average around $400, with labor and permitting making up the remainder. The single biggest variable is distance from the main panel — the farther the run, the more copper wiring required, which increases both material and labor costs. Installations in detached structures may also require trenching for underground conduit, adding to the total. We provide itemized quotes that break out equipment, labor, and permit fees so there are no surprises.
Frequently Asked Questions
How long does subpanel installation take? Most subpanel installations are completed in one day. More complex runs — such as to a detached garage requiring trenching — may take two days. Your power will be briefly interrupted when we connect the subpanel to your main breaker. We communicate the exact timeline before work begins.
Do I need to upgrade my main panel first? Not always. We perform a load calculation to verify your main panel has enough remaining capacity to safely support the new subpanel. If it does, we proceed directly with the subpanel installation. If your service is already at its limit, a main panel upgrade will be recommended first. For new circuits in a specific area only, a subpanel is almost always the more cost-effective path than a full 200-amp service upgrade.
