ADU Electrical Installation
in Southern California
Subpanel feeds, underground feeders, second meter coordination, and full ADU wiring across San Diego County and the Inland Empire.
Full-Service ADU Electrical
From the main panel to the last outlet — we handle every phase.
Subpanel Installation
A dedicated subpanel in your ADU fed from your main residence panel. Properly sized for all ADU loads including EV charger readiness.
Underground Feeder
Trenched conduit from main panel to ADU with properly sized conductors per load calculation. We handle permits and inspections.
Second Meter Coordination
Want a separate utility account for your ADU tenant? We coordinate the second meter application directly with SCE / SDG&E and prepare the service entrance.
Rough-In & Trim-Out
Complete interior wiring — outlets, switches, lighting circuits, appliance circuits, smoke detectors. AFCI and GFCI compliant per 2022 California Electrical Code.
How ADU Electrical Works
Site Assessment
We evaluate your main panel capacity, determine feeder sizing, plan the conduit route, and provide a written flat-rate quote covering all phases.
Permit & Rough-In
We pull the electrical permit, trench and install the underground feeder, install the subpanel, and complete all rough-in wiring for inspection.
Trim-Out & Final
After framing and drywall, we return for trim-out — devices, fixtures, panel terminations — and pass the final electrical inspection.
ADU Electrical Cost
Full ADU Electrical Installation
ADU electrical costs in Southern California typically range from $10,000 to $35,000+ depending on scope. Key factors include ADU size, feeder run distance, whether a main panel upgrade is needed, second meter coordination with SCE / SDG&E, and permit fees. Written flat-rate quotes provided after free on-site assessment.
Rebates & Incentives Available
SCE customers may qualify for up to $4,200 through the Charge Ready Home program. Federal tax credits of up to 30% may also apply.
See all available rebates →ADU Electrical FAQ
Yes — California code requires a dedicated means of disconnect for an ADU. In most cases this means a subpanel in the ADU fed from your main panel via an underground feeder.
It depends on your current panel size and existing loads. Most 200A panels can support an ADU feeder. 100A panels often need upgrading first. We assess this during your free quote visit and give you an honest answer before any work begins.
A second meter gives your ADU its own utility account — useful if you are renting to a tenant. We prepare the service entrance and coordinate the application with SCE / SDG&E. The utility installs the actual meter. Timeline is typically 4 to 8 weeks after application.
Yes — always. ADU electrical permits are required by the city or county. We handle the full permit application, coordinate inspections, and ensure the work passes final.
ADUs in Riverside County and San Diego County fall under the 2022 California Electrical Code (based on NEC 2020). This includes AFCI protection for most circuits and GFCI protection in kitchens, bathrooms, and exterior locations.
Ready to Wire Your ADU?
Call Mario for a free on-site assessment. We serve all of Southwest Riverside County and San Diego County.