Panel Replacement Permits in California: What Electrical Contractors Need to Know

Why panel replacements are booming in California

Panel replacement is one of the fastest-growing residential electrical permit categories in California — driven by EV charger installations, solar battery storage, aging Federal Pacific and Zinsco panels, and the general electrification of homes. For electrical contractors in Southern California, panel replacements have become a core revenue driver, and the permit process is something you need to know cold.

What triggers a panel replacement permit

Any replacement of a main electrical panel — upgrading from 100A to 200A, replacing a defective panel, or upgrading to 400A for EV and solar storage — requires a permit in virtually every California jurisdiction. The permit requirement exists regardless of whether you're changing amperage or doing a like-for-like replacement.

Contractors sometimes ask whether small panel work can be done without a permit. The answer in California is consistently no — and getting caught working without a required permit results in significant fines, stop-work orders, and potential CSLB complaints.

What's required in a panel replacement submittal

• Permit application with property address and contractor license number
• Existing panel information (make, model, amperage)
• New panel information (make, model, amperage)
• One-line electrical diagram showing service entrance, main disconnect, and panel
• Load calculation if amperage is being increased
• Utility coordination documentation if service entrance is being modified

Panel replacement permit timelines in Southern California

Panel replacements generally move through review faster than solar or new construction permits. General timelines:

• LADBS: 5–14 business days for standard residential panel replacement
• San Diego: 5–10 business days
• Orange County cities: 7–14 business days depending on city
• Riverside/San Bernardino: 7–21 business days

Inspections for panel replacement

Panel replacement permits typically require at least one rough inspection (before the panel cover is closed) and a final inspection. Some jurisdictions require the utility to be present for the final. Understanding the inspection sequence for each jurisdiction you work in prevents costly re-inspection fees and schedule delays.