Sub Panel Installation Pros in San Jose
Need more power? Whether you’re adding an EV charger, remodeling your kitchen, or expanding into an ADU, our sub panel installations make room for more circuits—safely and up to code.
📞 Call (408) 929-6100
Why Install a Sub Panel?
If your main panel is out of space or too far from your project area, a sub panel is the ideal way to extend power—without a full service upgrade.
✅ Garage or ADU power
✅ Kitchen remodels
✅ Hot tubs & outdoor appliances
✅ EV charger installations
✅ Detached office or workshop
What We Include:
Code-compliant electrical subpanel
All breakers, conduit, and connections
Full grounding & bonding
City permitting & inspection handling
Seamless, clean installation by licensed pros
We don’t just make it work—we make it safe, organized, and built to last.
Get a Free Estimate
Still my go to electrical contractor. On time, plenty of communication, professional.
Converting from propane to an electric BBQ (firewise change).
Needed a new outlet on a 20 amp circuit that had an old 15 amp style socket. These are the guys I trust to keep us safe.
Update 9/2020 - Upgraded some thermostat wiring for me with a difficult routing. Professional and quick.
Update - Jason and Josh again came through for me. In the midst of a heat wave, they were able to come to the other end of the county and fix an electrical problem at my mother's house. Got the outlets for the portable AC and lift chair back working and made the wiring safer to boot.
Original - Could not ask for better. Jason installed a new 40 amp circuit and an EVo charger for our car. (No more slow 110 charging. Yeah!) While working in our breaker panel he noted a dangerous situation left by a previous contractor who upgraded our air conditioning.
(Side note kind of disappointing the inspector didn't notice that the other contractor put in a bigger breaker on a wire that was too small. Luckily the wire insulation had just started to bubble and it didn't catch fire.)
Within a week they were able to fit us in to replace the faulty circuit as well as rewire our garage lighting to eliminate some creative but scary runs of extension cords and re-purposed outlets. Now I have bright lights and when I look up, I don't see wires draped everywhere.
We connected with Jason of Dollens Electric through our equally excellent general contractor Dan Mackey. (Who by the way had nothing to do with the faulty circuit or the creative garage lighting.)
Lastly a thank you to Jason's son Josh who got to do the crawling under the house.
I had a hard time finding a contractor who wanted to install a power meter for dynamic energy monitoring over an expensive DCC. On my first call with them they recommended an Emporia Pro which is the cheapest option for dynamic load management, so I knew that they had the best for the customer in mind. I decided to go with Wallbox's offering instead; although I picked a less common method for dynamic load management Joshua had no issues wiring everything and it was great to see that he took in my input instead of just telling me I had to install a costly DCC. I also liked that he already had a lot of prior experience installing Wallbox's car charger.
Thank you for an amazing install. Support Local!
I was pleased when they briefly reviewed an installation manual to make sure they remembered exactly how the brand worked. It was obvious Joshua already knew how to make the installation but he doubled checked anyway. (I'm glad I'm not the only person who still refers to a manual.)
Call/use them; you won't be sorry.
Excellent communication and professional!
Highly recommend!
Jason seemed to know the possible cause for the problem when I told him that the parts of the house were losing power gradually, and he was right!! He came out on the same day and fixed the problem (burnt crimp in junction box in the garage) within an hour!! Excellent!
They went above board to make sure every thing was done to perfection !
They give an accurate read on what needs
to be done. They are a safety-first company
that shows up energetic & work...
Garage Subpanel Experts
From classic San Jose homes to modern remodels, we’ve installed hundreds of garage subpanels. Our team plans for long-term growth, ensures your installation passes inspection, and leaves your site spotless.
Panel Expansion Done Right
Not every job needs a full panel upgrade. If your service capacity is fine—but you need more room for circuits—a sub panel is the smarter, more affordable choice.
Why Homeowners Choose Dollens Electric
Licensed & Insured Electricians
Clean, Respectful Workmanship
Easy Scheduling with Text Updates
Based in San Jose, Serving the South Bay
5-Star Rated Since 2004

“Dollens Electric upgraded our panel in Sunnyvale so we could go solar. They handled the permit, did clean work, and passed inspection without a hitch. Jason and his crew are the real deal.”
– Monica F., Sunnyvale homeowner
Frequently Asked Questions
Do I need a permit for a sub panel?
Yes. We handle the permits and inspections for all electrical subpanel installations.
How long does installation take?
Most sub panel jobs take one day. We schedule efficiently to minimize downtime.
Is a sub panel the same as a panel upgrade?
No. A sub panel adds space for new circuits. A panel upgrade replaces your main service panel and may involve increasing your home’s power capacity.
Get Ready for the Gas Appliance Ban in Santa Clara County
The Bay Area Air Quality Management District (BAAQMD) has passed new rules that affect nearly every homeowner in Santa Clara County:
❌ Gas Water Heaters will be banned starting 2027
❌ Gas Furnaces will be banned starting 2029
These changes are part of California’s push toward cleaner, all-electric homes—and they have real electrical implications.
Related Electrical Services You May Need
Thinking about a full upgrade? Learn more about our Electrical Panel Upgrades in San Jose.
Planning to install an EV charger at home? See our EV Charger Installation Services.
Living in an older home? We specialize in Knob & Tube Rewiring.
Remodeling your kitchen? Check out how we handle Electrical Upgrades for Kitchen Renovations.
Call (408) 929-6100
Book Service Online Now »
We accept most major forms of credit cards, including Visa and MasterCard.
Serving
San Jose | Santa Clara | Cupertino | Sunnyvale | Campbell | Los Gatos | Saratoga | Mountain View | Morgan Hill | Gilroy | Los Altos | Surrounding South Bay Areas
Related Post

What Makes a Great Electrician? The Hidden Skill of a True Residential Service Professional

San Jose Solar Repair | Fix Abandoned Solar Systems After Company Shutdown
