Thinking about upgrading your electrical panel but not sure where to start? You’re not alone — panel upgrades are one of the most common electrical projects for homeowners across Orange County, whether you’re adding an EV charger, finishing a home addition, or simply dealing with an aging 100-amp service. Below are the questions our licensed electricians hear most often, answered with the specifics you actually need to make an informed decision.
How much does an electrical panel upgrade cost in Orange County?
Most Orange County homeowners pay between $2,500 and $4,500 to upgrade from a 100-amp to a 200-amp panel, including parts, labor, permit fees, and the required city inspection. Upgrading to a 400-amp service — common for larger homes or those with multiple EV chargers — typically runs $4,500 to $8,000+. The final cost depends on your home’s age, the condition of existing wiring, how far the panel is from the meter, and which city you’re in. Irvine, Newport Beach, and other OC cities each set their own permit fees, which generally range from $150 to $400 for panel work. O’Hagan Electric provides detailed written estimates before any work begins — call (949) 877-4945 for a free assessment.
How long does an electrical panel upgrade take?
A straightforward panel upgrade — swapping out an old 100-amp box for a new 200-amp panel — typically takes 4 to 8 hours for an experienced crew. That includes removing the old panel, installing the new one, reconnecting all circuits, and testing the system. You will have a brief power outage during the swap, usually 2 to 4 hours. If your upgrade requires moving the panel, upgrading the meter base, or running new conduit, the job may extend into a second day. The city inspection is scheduled separately after installation — in most Orange County cities, inspections are booked within 1 to 3 business days.
Do I need a permit for an electrical panel upgrade in Orange County?
Yes — a permit is required for any electrical panel upgrade in every Orange County city, including Irvine, Newport Beach, Mission Viejo, Aliso Viejo, and all others in the county. This is non-negotiable for good reason: the permit triggers a city inspection by a licensed electrical inspector who verifies the installation meets California Electrical Code. Unpermitted panel work can create serious liability issues when you sell your home and may be flagged by a buyer’s home inspector. At O’Hagan Electric, we pull all permits on your behalf and coordinate the city inspection as part of every panel upgrade job — you don’t have to manage any of that paperwork yourself.
What’s the difference between a 100-amp, 200-amp, and 400-amp panel?
The amperage rating tells you how much total electrical load your panel can handle at once. A 100-amp panel was the standard for homes built before the 1980s and is adequate for smaller homes without electric appliances, EV chargers, or central air conditioning. A 200-amp panel is the current standard for most single-family homes in Orange County — it comfortably handles modern appliances, EV charging, air conditioning, and a full suite of electronics. A 400-amp panel (or two 200-amp panels) is typically needed for larger homes over 3,000 square feet, homes with multiple EV chargers, pools, hot tubs, or those planning significant electrical additions. If you’re unsure what your home needs, our electricians can assess your current load and future plans to recommend the right size.
Do I need a panel upgrade to install an EV charger?
Not always, but often yes — especially if you have a 100-amp panel or your existing 200-amp panel is already near capacity. A Level 2 EV charger requires a dedicated 240-volt, 50-amp circuit. If your current panel doesn’t have spare circuit breaker slots or available amperage headroom, an upgrade is necessary before installation. During a free estimate, O’Hagan Electric will evaluate your panel’s current load, available space, and the specific charger you’ve chosen to determine whether an upgrade is needed. In many cases, we can install a subpanel specifically for EV charging as a more affordable alternative to a full panel replacement — this is a popular solution for newer OC homes that already have a 200-amp service but limited spare capacity.
Will my homeowner’s insurance require a panel upgrade?
Some insurance carriers in California will require a panel upgrade — or may refuse to insure your home at all — if you have certain outdated panel types. Federal Pacific Electric (FPE) Stab-Lok panels and Zinsco panels are the two most common panels that insurers flag, as both have well-documented safety issues with breakers failing to trip during overloads. Homes with 60-amp or undersized service are also increasingly difficult to insure. If you’ve received a notice from your homeowner’s insurance asking you to upgrade your panel, that letter may also help offset costs — some policies cover partial replacement for safety-related upgrades. We’re experienced in writing documentation for insurance claims involving panel replacement and can help you through the process.
What happens during the city inspection after a panel upgrade?
After O’Hagan Electric completes your panel upgrade, we schedule a final inspection with the local building department — whether that’s the City of Irvine, the City of Newport Beach, or another Orange County municipality. The city’s electrical inspector visits your property (you or an adult resident should be present) and visually checks the new panel installation against California Electrical Code requirements: proper labeling of all breakers, correct wire gauge and connections, grounding and bonding, clearance distances, and weatherproofing if the panel is outdoors. The inspection typically takes 20 to 30 minutes. If everything passes — which it does on the vast majority of O’Hagan Electric jobs — the permit is signed off and the project is complete. We handle all permit closing documentation on our end.
How do I know if I need a full panel upgrade or just a repair?
A panel repair makes sense when the issue is limited — a single faulty breaker, a loose connection, or a damaged breaker slot — and the overall panel is in good condition and correctly sized for your home’s needs. A panel upgrade is the right choice when your panel is undersized (100 amps or less), is a known problematic brand (FPE, Zinsco), is more than 25 to 30 years old, shows signs of overheating or corrosion, or can no longer accommodate the circuits your home requires. If you’re frequently tripping breakers, have flickering lights under load, or are adding significant new demand (EV charger, HVAC upgrade, home addition), an upgrade is almost always the better long-term investment. O’Hagan Electric will give you an honest assessment — we’ll tell you if a repair is all you need, rather than overselling a full replacement.
Need Help? Contact O’Hagan Electric
O’Hagan Electric has served homeowners across Orange County for over 20 years, with a 4.9-star rating from 473+ Google reviews and an A+ rating from the Better Business Bureau. We’re licensed, bonded, and insured (License #1022498) and serve Irvine, Newport Beach, Mission Viejo, Aliso Viejo, Lake Forest, Laguna Niguel, Dana Point, San Clemente, and all surrounding Orange County communities. Call us at (949) 877-4945 to schedule your free panel assessment today.
