Sub-Panels for ADUs, Garages, Workshops and Additions

When your main panel is out of room, or the new space is far from it, a sub-panel puts breakers where you need them. We size it with a load calculation and handle the permit.

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When you need one

Is a Sub-Panel the Right Fix?

A sub-panel adds breaker space and puts circuits closer to where they’re used. These are the jobs where it usually makes sense.

You’re building an ADU or converting a garage
Your main panel has no open breaker spaces
A detached garage or workshop needs power
You’re adding a room or second story
A hot tub, pool or spa needs its own panel nearby
You’re adding EV chargers in the garage
Long circuit runs make a local panel more practical
Outdoor lighting and outlets for a large yard

How it works

How a Sub-Panel Install Works

Load Calculation

We check what your service can supply and what the new space will draw, so the sub-panel and feeder are sized right.

Options with Prices

A sub-panel, a panel upgrade, or both if your service is too small. Each option priced before any work starts.

Permit and Install

We pull the permit, run the feeder from the main panel, and install and wire the sub-panel.

Inspection and Walkthrough

After inspection, we label every circuit and show you how the new panel works.

Why it matters

More Breaker Space Isn’t More Power

A sub-panel adds room for circuits, but it doesn’t add capacity. Everything still comes through your main service. If your home runs on 100 amps and you’re adding an ADU with its own kitchen, AC and laundry, a sub-panel alone may not be enough.

That’s why we start with a load calculation. It tells us whether a sub-panel is the answer, or whether your service also needs an upgrade.

ADUs are the most common reason. Across Los Angeles, ADUs need their own circuits and often their own panel. Some are fed from the main house, some get a separate meter. We’ll walk you through what your city and utility require.

What Affects the Price

We quote after the load calculation and site visit. The biggest factors:

We Pick Up

Open 24/7, holidays included.

We Show Up

Local dispatch from Highland Park.

You Choose

Options and prices before any work.

Licensed

Bonded & insured · CSLB #1080235

Guides & answers

Helpful Reading Before You Call

Answer

ADU Electrical Requirements in Los Angeles

Where we work

Sub-Panel Installation Across Northeast LA and Surrounding Cities

Ready Electric serves 21 neighborhoods and cities across Northeast LA and surrounding cities. Outside these areas? Call anyway.

FAQ

Sub-Panel Questions

What’s the difference between a sub-panel and a panel upgrade?

A sub-panel adds breaker space fed from your main panel. A panel upgrade increases the total power coming into your home. Some jobs need one, some need both.

Do I need a sub-panel for an ADU?

Often, yes. An ADU usually needs its own circuits and a panel nearby. Depending on its size and your city, it may need a separate meter instead.

Can a sub-panel go in a detached garage?

Yes. We run a feeder from the main panel, usually underground, to a sub-panel in the garage or workshop.

Does a sub-panel need a permit?

Yes. Sub-panel installations need an electrical permit and inspection. We handle the permit.

How long does it take?

Many sub-panel installs are done in a day or two. Detached buildings that need trenching take longer.