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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.
If a brand new panel is needed expect to pay double or triple that price, as much as $2,500 for 100 amps. If you are in need of a panel that can handle more than 100 amps the price goes up. If you wish to upgrade your existing electric breaker panel to 200 amps the cost is anywhere from $1,200-$3,000.lectrical Subpanel Cost. In most cases of upgrading to a 400-amp electric panel (and in some cases a 200-amp panel) you will also need a subpanel or two. These subpanels range in price from $500-$1000.