Accessory Dwelling Units (ADUs) and home additions are booming across San Diego — from Oceanside to La Jolla — as homeowners look to maximize property value and create flexible living spaces. But before the drywall goes up, one crucial part of your project needs the right attention: the electrical system.
Whether you’re converting a garage, adding a rental unit, or expanding your home, planning electrical work early saves time, money, and headaches later. Here are five electrical upgrades every San Diego homeowner should considerbefore breaking ground.
1. Upgrade Your Main Electrical Panel
If your home was built before the 1990s, chances are your main panel wasn’t designed to handle modern electrical loads. Adding an ADU or new wing means adding demand — HVAC, lighting, EV chargers, and appliances all require more capacity.
A panel upgrade ensures your system can safely distribute power without tripping breakers or overheating circuits. For most ADUs, a 200-amp panel is recommended to handle the added load and future-proof your home.
2. Add Dedicated Circuits for Major Appliances
Each new appliance — washer, dryer, refrigerator, or air conditioner — should have its own circuit. This helps prevent overloads and keeps your system efficient. San Diego’s building and safety code requires dedicated circuits for heavy-load appliances, so having a licensed electrician design your circuit layout early will keep you compliant and inspection-ready.
3. Wire for Smart Home & Energy Efficiency
New additions are the perfect time to integrate smart lighting, thermostats, and security systems. Planning for low-voltage wiring (for Wi-Fi, Ethernet, and security cameras) will future-proof your home’s technology setup. Plus, LED lighting and energy-efficient fixtures can reduce your energy use by up to 75%, cutting utility costs for your ADU or expanded space.
4. Plan for EV Chargers and Solar Readiness
San Diego is one of California’s leaders in EV adoption — and many homeowners are choosing to add EV charging capacity during construction. Even if you don’t own an electric car yet, prewiring for a Level 2 EV charger or solar battery system (like the Tesla Powerwall) now can save thousands later. Installing conduit and a subpanel during construction makes it easy to add renewable energy or vehicle charging when you’re ready.
5. Ensure Proper Grounding and Surge Protection
With added electrical demand comes increased risk of power surges — especially during Southern California’s high-demand summer months. A licensed electrician can install whole-home surge protection and proper grounding to protect your new space (and your electronics) from costly damage.
Bonus Tip: Schedule an Electrical Inspection Before Framing
One of the biggest mistakes homeowners make is waiting until the walls are up to think about wiring. Scheduling an electrical rough-in inspection before insulation or drywall helps avoid rework and ensures everything is code-compliantwith the City of San Diego’s building inspection standards.
Build It Right from the Start
Every ADU or addition is unique, but smart electrical planning sets the foundation for safety, comfort, and long-term value. At Von Dueber Electric, we handle full-scope electrical builds for residential remodels, additions, and new construction — from design to final inspection.
If you’re planning a project anywhere in San Diego County — including Carlsbad, Encinitas, Solana Beach, or La Jolla — get in touch for a free consultation.
Contact us today to make sure your project is wired right from the start.
