The average cost to have a professional licensed electrician replace or upgrade a residential breaker box typically ranges from $800 to $3,000, with the national average sitting around $1,800. A basic, straightforward 100-amp panel swap runs on the lower end ($850 to $1,500), whereas upgrading to a heavier 200-amp service or handling complex panel relocations, utility coordination, and code-compliance updates pushes costs toward the higher end.
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