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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.
Adding a new room means adding new outlets and switches. These put a demand on your power supply and its interface, the breaker panel (or fuse box in older homes). A new breaker panel costs between $50.00 and $100.00 for most residential applications. Installation can cost around $1,000.00, but itâs worth it to know the job was done right.