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Homes less than 10 years old will have a modern type breaker box. As far as cost goes, that is a good thing if an upgrade becomes necessary. In this type of house, the breaker box will be a minimum of 100 amps, and probably have enough available open circuits to allow upgrading without needing an entirely new panel. This type of upgrade can usually be completed between $363 and $1004.
When you hear someone say they need a âlargerâ electrical panel or breaker box, there are 2 things they could be referring to: 1  The amount of electricity the panel can handle â This is measured in amps. Most homes have either 100-amp or 200-amp breaker boxes. The number of circuits a panel can handle â If you donât have space for new circuits but need to add one, you can either add a sub-panel or upgrade your breaker box to handle more circuits.