200 amp panel upgrade: what changes and when you need it

Short answer

If your house has a 60, 100 or 125 amp panel and you are adding a charger, a heat pump, an ADU or a big remodel, 200 amps is the standard next step. The work usually takes one working day with the power off for most of it. Cost lands between $2,500 and $4,500 in the typical SoCal range, with the permit. The 200 amp panel cost page breaks down that range.

What is replaced

A real 200 amp upgrade is more than a new box. The electrician usually replaces these parts:

• the main panel with a new 200 amp main breaker panel,
• the service conductors between the meter and the panel, sized for 200 amps,
• the mast or riser conduit, if the old one is too small,
• the grounding and bonding, tied to the water pipe, the gas pipe and a ground electrode,
• and a surge protective device next to or inside the panel.

The meter socket stays when it is in good shape and rated for 200 amps. If it is not, it is replaced too, and the utility has to approve that. See meter and service mast work.

What an inspector looks at

Each city publishes its own checklist. Laguna Niguel’s, updated in January 2026, is a useful sample of what inspectors check:

• the panel is listed for outdoor use if it mounts outside,
• the meter sits between 4 ft 6 in and 6 ft 3 in above finished grade,
• there is 36 inches of clear space in front of the panel and 30 inches across,
• one wire per breaker, with neutrals and grounds on their own lugs,
• all circuits are labeled on the panel door,
• spare wires not landed on a breaker are capped, and room is left for future breakers,
• the grounding conductor is sized from the chart, and ground bonds reach the water and gas pipes.

That same chart lists 2/0 AWG conductors and 1-1/2 inch rigid conduit for a 200 amp service, with a 4 AWG grounding electrode conductor for a Ufer ground. These are one city’s numbers. Yours may differ.

Rules that came with the 2022 and 2025 codes

Two items catch people who have not had a panel done in several years.

Surge protection. Under section 230.67, every new or replaced service for a dwelling needs a Type 1 or Type 2 surge protective device, built into the panel or mounted next to it. California’s 2022 code made this a rule starting January 1, 2023. The surge protection page covers it.

Outdoor emergency disconnect. For one- and two-family homes, section 230.85 requires a disconnect in a readily accessible outdoor spot, marked “EMERGENCY DISCONNECT.” Many new panels are service-rated main breaker panels mounted outside, which meets this directly. A panel mounted inside needs a separate outdoor disconnect.

California’s 2025 Electrical Code took effect January 1, 2026 and is based on the 2023 NEC. Ask your city which edition it applies to your permit.

Cost in brief

The typical SoCal range is $2,500 to $4,500 as of October 2026, and it rises when the meter or mast has to move or the service is underground. The 200 amp panel upgrade cost page lists what moves a quote and what a standard quote includes.

Is 200 amps enough?

For one EV charger, a heat pump and an electric range, yes in most homes. A load calculation proves it. The electrician adds up lights, receptacles, large appliances and the continuous loads like chargers, then applies the demand factors in the code. If the total passes 200 amps, you either shed load with a smart panel or go to 400 amp service. The EV charger and panel guide shows a worked example.

On the day

The utility disconnects power, usually in the morning. The electrician removes the old panel, installs the new one, and reconnects each circuit. The city inspects, releases the meter, and the utility restores power, often the same afternoon. The permit and inspection page lists each step.