Owner-Operated Electrician · 10+ Years Serving Sonoma CountyCall (707) 684-0024
Sonoma Sun Electric INC.Owner-Operated · Santa Rosa, CA
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Power Where You Need It

Subpanel Installation

Adding a subpanel for a garage, shop, ADU, or addition, so you’re not fighting an overloaded main.

Find out what it’ll cost

Tell us what’s going on. The owner reads every message and gets back to you, usually same day.

Free, no-obligation first visit. CA licensed & insured.

When a garage, workshop, ADU, or addition needs its own set of circuits, running everything back to an already-full main panel is a losing battle. A subpanel gives that space its own dedicated distribution, cleanly fed from the main, so you get the circuits you need without maxing out the house.

We size the subpanel and its feeder to the loads you’re actually planning, ground and bond it correctly, and label everything so the next person, including future-you, isn’t guessing. It’s a common request out here for shops, barns, and the ADUs going in all over Sonoma County.

What our subpanel installation covers

  • Garage, shop, and barn subpanels
  • ADU and addition distribution
  • Properly sized feeders and grounding
  • Dedicated circuits off the new subpanel
  • Clean labeling and documentation
  • Permits pulled and inspected

How subpanel installation works with us

Every subpanel installation job starts the same way: we come look at what you actually have. There is no charge to find out what you need, and there is no pressure. We walk the situation, ask how you use the space, and then explain in plain language what the work involves and exactly what it’ll cost before anything begins.

Because we are owner-operated, the person who looks at your subpanel installation project is the same person who performs it. Nothing gets handed off to a rotating crew, and nothing gets quoted by someone who never sees the job. That continuity is why our work holds up and why so much of our business comes from repeat clients and referrals across Sonoma County.

What to expect on the day

We show up when we say we will, protect your floors and finishes, and keep the work area clean. When a subpanel installation job needs a permit, we pull it and handle the inspection, so the work is documented and safe. When we leave, the site is tidy and you know exactly what was done and why. You always have a direct line back to the owner if a question comes up later.

We also take the time to answer your questions while we are there. Part of doing subpanel installation right is making sure you understand what changed and how to get the most out of it, whether that is how a circuit is protected, how a control is programmed, or what to watch for down the road. You are never left guessing, and if something needs attention later, you reach the same person who did the work, not a call center.

Open electrical panel with neatly dressed circuit wiring in a Sonoma County home
Open electrical panel with neatly dressed circuit wiring in a Sonoma County home

Local knowledge that shows up in the work

After more than a decade wiring homes across Sonoma, Marin, Napa, and Solano counties, we know how the local grid behaves, which permit desks want what, and how Wine Country homes are actually built. That experience is what lets us diagnose a subpanel installation situation quickly and get it right the first time, instead of learning on your dime.

Subpanel Installation for North Bay homes

Sonoma County properties are not interchangeable. A century-old farmhouse in Sebastopol, a hillside home above Healdsburg, and a fresh build in Windsor each ask for a different approach. We bring over a decade of local knowledge to every subpanel installation job, so the result fits the home, meets current California code, and stands up to how you actually use it. If you have been putting off subpanel installation because you were not sure who to trust, this is the kind of work we built our name on.

Why it pays to do it right

Cutting corners on electrical work is the most expensive kind of saving. A subpanel installation job done to a price instead of a standard tends to come back as a callback, a failed inspection, or worse. Our diagnostic approach and meticulous craftsmanship cost a little more attention up front and save you the repeat visits later, which is why homeowners across Sonoma County keep calling us and referring us to their neighbors.

Ready to move forward, or just want a straight answer on whether subpanel installation is what you actually need? Call (707) 684-0024 or request a free, no-obligation visit. The owner takes the call, looks at the work himself, and tells you plainly what it will take and what it’ll cost. You can also browse the gallery to see the standard of work we hold on every job.

Talk to the owner

The person who quotes the job is the one who does it.

(707) 684-0024What It’ll Cost
  • CA Licensed & Insured
  • 10+ years of experience in Sonoma County
  • Free, no-obligation visit
  • Permits handled
  • Veteran & senior discounts
More We Do

Other electrical work

Panel Upgrades

Trusted electrical work across the North Bay.

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Electrical Repair

Trusted electrical work across the North Bay.

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Circuit Breaker Installation

Trusted electrical work across the North Bay.

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Dedicated Circuits

Trusted electrical work across the North Bay.

Read more

Troubleshooting

Trusted electrical work across the North Bay.

Read more
Why Homeowners Call Us

Done right the first time, by the owner

Over a decade of experience across the North Bay means we know the homes, the codes, and how the local grid behaves.

Certified & Insured

CA licensed, fully insured, and bonded. Certified Lutron and Span installers.

Diagnostic, Not Guesswork

We test to find the root cause, which means fewer callbacks and lasting fixes.

10+ Years Experience

Deep North Bay experience, from Wine Country estates to everyday remodels.

The Owner Shows Up

You deal with the same person from the first call to the final inspection.

What Neighbors Say

Trusted across Sonoma County

★★★★★

“Installed a Tesla charger in our garage. Seamless from the first call to the final inspection. Professional, clean, and they explained everything.”

Mark R.Santa Rosa, CA
★★★★★

“A breaker kept tripping in our older home. They diagnosed it in under an hour after another company couldn’t. I won’t call anyone else now.”

Jennifer L.Petaluma, CA
★★★★★

“Needed a panel upgrade for a new hot tub. They handled the entire job including the permit. The new panel is incredibly tidy.”

Tom H.Sebastopol, CA

Find out what your residential project will cost

Free, no-obligation visit. The owner takes the call. See our recent work in the gallery.

Good to Know

Subpanel Installation questions

Do I need a subpanel or just more circuits?
If a space needs several circuits or is far from the main, a subpanel is usually cleaner and more expandable. We’ll advise honestly.
Can you feed a detached shop or barn?
Yes, including proper underground or overhead feeders and grounding for a detached building.
Will it overload my main panel?
We check your main’s capacity first and size the subpanel feeder so the whole system stays within limits.
Is a permit needed?
Yes, and we handle the permit and inspection.
Can you add circuits later?
That’s the point of a subpanel, we leave you room to expand.
What areas do you cover?
Santa Rosa and all of Sonoma County, plus Marin, Napa, and Solano.