Sub Panel Installation & Upgrades in San Ramon, Danville, Walnut Creek & the East Bay
Crow Canyon Electric installs and upgrades sub panels in San Ramon, Danville, Blackhawk, Walnut Creek, Berkeley, Oakland, Alameda, Livermore, Pleasanton and Fremont. A sub panel adds breaker space close to where the power is needed, such as a garage, ADU, shop or addition, when the main panel is full or far away.
Sub Panel Upgrades done properly, start to finish
A sub panel is a second breaker panel fed from the main one. It puts circuits where you need them without running every wire back to the main panel. It is a common answer for a converted garage, a detached workshop, a backyard ADU or a room addition.
The size of the sub panel, the feeder wire and the main breaker feeding it all have to match what the main panel can actually supply. We check that first, then run the feeder, mount the panel and label every circuit. If the main panel cannot carry the extra load, we will tell you and offer a main panel upgrade.
Sub Panel Upgrades services we offer
- Load check of the main panel
- Feeder cable and conduit to the new location
- Sub panel and breaker installation
- Grounding and bonding done to code
- New circuits for outlets, lighting and equipment
- Circuit labeling
- Permit and inspection coordination
- Testing and walkthrough
When to call
- The main panel has no spare breaker slots
- You are converting a garage or building an ADU
- A workshop or outbuilding needs power
- You are adding EV charging far from the main panel
- A room addition needs its own circuits
Sub Panel Upgrades in the field
What happens after you call
Call or send a request
Tell us what you want to do. Call (510) 650-9113 on a weekday or use the form, and we arrange a visit.
Look and plan
We look at the panel, the wiring and the space, listen to what you want and explain the scope and options.
Permits and scheduling
We plan the work, handle permit and inspection steps and schedule around you and your contractor.
Install, test and walk through
The work is installed, tested and cleaned up, and we walk through the result with you.
Sub Panel Upgrades across the East Bay
Crow Canyon Electric provides sub panel upgrades in San Ramon, Danville, Blackhawk, Walnut Creek, Berkeley, Oakland, Alameda, Livermore, Pleasanton and Fremont.
Sub Panel Upgrades FAQ: common questions
Straight answers about sub panel upgrades from Crow Canyon Electric, serving San Ramon, Danville, Walnut Creek, Berkeley, Oakland, Alameda, Livermore, Pleasanton, Fremont.
- sub panel installation near me
- garage sub panel electrician
- add a subpanel for ADU or workshop
- subpanel upgrade
- extra breaker space electrician
- detached garage electrical panel
A sub panel is a smaller breaker panel fed from your main panel. It provides extra circuits near a garage, ADU, workshop or addition.
If your main panel has enough capacity but no room or is far from the new load, a sub panel is usually simpler. If the main service is maxed out, a main panel upgrade is the better fix.
Often yes, as long as the main service has the capacity. We check the load before we recommend it.
Usually yes. We help you with the permit and inspection steps in your city.
It depends on the sub panel size, the feeder length and conduit route, the main panel’s capacity and permit requirements. We quote after a look at the main panel and the new location. Call (510) 650-9113 for a quote.
Sub panels come with different numbers of breaker spaces. We size one for what you need now plus spare room, as long as the main panel can supply the load.
Often yes. A garage sub panel puts breaker space where the power is needed. We check the main panel’s capacity first.
If the main panel has enough capacity but is far away or full, a sub panel at the ADU is usually the answer. If the whole service is maxed out, a main panel upgrade comes first. We calculate both before recommending one.
More from Crow Canyon Electric
01EV Charger Installation
Wall-mounted Level 2 chargers on a dedicated circuit, installed neatly in your garage or on an outside wall.
Explore EV Charger Installation
02Main Panel Upgrades
Replace an outdated or overloaded main panel with a safe, higher-capacity one built for today’s loads.
Explore Main Panel Upgrades
04Electrical Remodels
Rewiring, new circuits, outlets and updated panels for kitchens, baths, additions and whole-house remodels.
Explore Electrical RemodelsGuide · 4 min readDo I Need an Electrical Panel Upgrade? Signs to Look For
Frequent tripped breakers, a full panel, visible rust or heat damage, and plans for an EV charger, ADU or heat pump all point to a panel upgrade.
Read the guideReady to talk about sub panel upgrades?
Call (510) 650-9113 or send a request. Jerry will arrange a visit to look at the work and explain your options.