For a straightforward installation of a single standard box in an accessible location, homeowners often see $120-$260. Projects involving new or upgraded circuits, larger panels, or difficult access commonly run $800-$1,600, with high-end setups surpassing $3,000 in some. The average electrical box replacement cost in San Francisco is $2,137, but it can range between $795 and $3,555. The amount you will pay depends on several factors, ranging from amperage to add-on tasks. Cost and price details focus on realistic estimates. The exact cost of an electrical panel installation or replacement can vary widely based on the project scope. If. Several factors determine the final cost: Simpler stations cost a few hundred dollars, while high-spec stainless units or custom panels may exceed $5,000. Enter the square footage of your space.