How to Upgrade Your Electrical Panel

Your electrical panel is the nerve center of your home's power system. When you're running out of circuits, experiencing frequent breaker trips, or planning a major renovation that demands more amperage, an upgrade becomes necessary. A panel upgrade typically means moving from 100 or 150 amps to 200 amps, which gives you breathing room for modern appliances, EV chargers, heat pumps, and future additions without constant compromises. Done right, it's a once-in-a-generation improvement that eliminates power bottlenecks and makes your home genuinely future-proof. But here's the hard reality: this work sits squarely in professional territory. The panel itself sits at the point where utility lines enter your home—upgrading it means coordinating with your power company, pulling permits, scheduling inspections, and working with active utility power. A mistake doesn't mean a broken faucet; it means electrocution, fire, or code violations that tank a home sale. This guide walks you through what happens during an upgrade, how to hire the right electrician, and what to expect from start to finish.

1. Assess your current panel and power needs. Open your main panel and note the amperage rating (usually printed on the main breaker—100A, 150A, or 200A). Count how many breakers you have and how many are in use. Walk through your home and list major appliances and future additions you're planning (EV charger, heat pump, second HVAC zone). This inventory tells your electrician whether you need 200A service or if a sub-panel would solve your problem more cheaply.
2. Hire a licensed electrician and get a detailed estimate. Contact three licensed electricians in your area and ask for an in-person assessment. A good electrician will examine your panel, check your meter, ask about your future plans, and provide a written estimate that breaks down the panel itself, labor, permit fees, utility company work, and any necessary rewiring or upgrades to your service entrance. Don't go with the cheapest bid; go with the electrician who explains the work clearly and isn't cutting corners.
3. Pull the building permit. Your electrician typically files the permit on your behalf, but confirm this upfront. You'll need your property address, current panel information, a diagram of the proposed panel layout, and proof that the electrician is licensed. The permit usually costs $150 to $400 depending on your jurisdiction. Without a permit, the work is illegal and uninsurable, and will surface during a home inspection or sale.
4. Coordinate with your utility company. Your electrician will usually contact the power company to schedule a disconnect and reconnect, but call ahead yourself to confirm timing and whether they need site access. Some utilities require 2-3 weeks' notice. On the scheduled day, the utility will arrive to disconnect power at the meter, your electrician does the panel swap, and the utility reconnects. Your house will be without power for 2-4 hours. Notify family, disable security systems that depend on power, and plan accordingly.
5. Remove the old panel and install the new one. On installation day, your electrician will first shut off the main breaker and verify power is off with a multimeter. The utility disconnects the lines at the meter. Your electrician then removes the old panel by unbolting the main breaker lugs from the utility lines, unbolting the neutral and ground bars, and unscrewing the panel from the wall. The new panel goes in the same location (or a nearby location if required by code or service entrance condition). All existing breakers and wiring are transferred to the new panel, properly secured, and labeled.
6. Complete the reconnection and testing. Once the new panel is fully wired and secured, your electrician verifies every breaker, tests ground and neutral continuity, and calls the utility company to reconnect. The utility lineman verifies the connection at the meter and turns power back on. Your electrician then tests every circuit with a multimeter, confirms the main breaker operates smoothly, and walks you through the new panel layout and any changes to your breaker configuration.
7. Schedule the final permit inspection. Call your building department to schedule the final electrical inspection. The inspector will verify the new panel is correctly rated for your service entrance, check that all connections are secure and properly labeled, confirm the grounding is correct, and ensure the work matches the approved permit plan. The inspection usually takes 30-60 minutes. Once passed, you'll receive a Certificate of Compliance or similar document. Keep this for your records and any future home sale.
8. Update your electrical documentation and plan for new circuits. Keep the new panel directory, the permit paperwork, the inspection certificate, and the electrician's invoice in a home file or folder. Now that you have available capacity, plan any new circuits or appliances you were holding back on—a dedicated circuit for an EV charger, an additional kitchen outlet, or a new subpanel for a detached garage. Your electrician can quote and install these much more easily now that the main panel is current and has available breaker slots.