Don't Let Your ADU Project Fail Before It Starts: The Electrical Secret to Success
December 12, 2025
Steve Katz
Introduction
Accessory Dwelling Units (ADUs) are the fastest way to increase your property’s monthly cash flow in Southern California. However, many property owners make the mistake of focusing on the floor plan before checking their power. Without proper electrical site prep, your ADU is just a shed with no lights.
Main Panel Capacity Check
You cannot simply "tap into" your existing building’s power if your main service is already at its limit
The Risks:
System Overload: Adding an entire living unit to an old 400A panel can cause frequent building-wide blackouts.
Service Upgrades: We determine if you need a "Heavy Up" to 600A or 800A to support the new dwelling safely.
Separate Metering for New Revenue
If you want to bill your ADU tenant for their own electricity, you need a separate meter—and that requires specific site prep.
Benefits:
Easy Billing: Avoid the headache of splitting one utility bill between multiple tenants.
Property Value: A "dual-metered" property is much more attractive to future buyers and investors.
Underground Trenching & Conduits
Running power to a detached ADU requires specialized underground infrastructure that meets strict city codes.
The Logistics:
Code-Compliant Burial: We handle the trenching and conduit installation to ensure your lines are protected from moisture and accidental damage.
Future-Proofing: We install oversized conduits so you can easily add fiber-optic internet or EV charging to the ADU later.
Utility & City Coordination
In Southern California, getting LADWP or Southern California Edison (SCE) to approve a new service drop is a notoriously difficult process.
How We Help:
Permit Management: We handle the load calculations and site plans required to get your electrical permits approved.
Utility Liaison: With 30+ years of experience, we speak the "utility language" to get your new meter set and energized faster.
Conclusion
Electrical site prep is the foundation of a successful ADU project. By addressing your power needs early, you avoid "surprise" costs and construction delays. Don’t wait until the drywall is up to realize you don’t have enough power—get your site prepped by the pros.


