Dear John: This is a question we get frequently. The answer, as it is so often with major home projects, is there’s a big potential cost range for rewiring a house. You can expect to pay $8,000 to $15,000 to rewire a 1,500- to 3,000-square-foot home. The precise cost will depend on the size and age of your house, the ease with which an electrician can access old wiring, and the quirks that abound in older homes.