Basic: 100A indoor replacement — Panel, new breakers, basic wiring; 6–8 hours; total $1,200–$2,000; includes standard permit where required. Key cost drivers include panel amperage, indoor vs outdoor location, wiring length, and whether a full panel upgrade or rerouting is needed. Typical installation time is 4–12 hours for a straightforward replacement; complex rerouting or an upgrade to a large subpanel can push this to 16 hours or more. data-formula=”labor_hours × hourly_rate”> Typical. Main Breaker: Replace your main breaker for between $500 and $2,000. This crucial hub regulates the power between your panel and circuits. Main Lug Panels: Installing this subpanel in place of your fuse box, also known as a downstream panel or secondary panel, costs $400 to $1,750 to install. They manage energy flow like traffic controllers, prevent electrical fires, and increasingly connect to smart home systems.
[PDF Version]