As a result, the total cost to rewire a moderate-sized house with easy access can cost between $3,500 and $8,000. Larger homes, or those with access that is more difficult, can cost $8,500 or more. Replacing old wiring in home electrical systems is important to keeping your home safe. Researching electrical wire prices is a good first step. If you plan to install copper wire, the price of copper wire is also important to consider. Reply! can help you find the information you need to make a well-informed decision about replacing the wiring in your home.