The process of rewiring a house entails removing the old, metallic wire and replacing it with a more contemporary, plastic-coated, non-metallic wire. Modern electrical needs and appliances cannot be supported by out-of-date wire, particularly knob-and-tube wiring, which was in use from the 1880s to the 1940s, or aluminum wiring, which was used in many homes built between 1965 and 1972. And they might even pose a fire risk. If your home is more than 25 years old, or you're doing a major renovation or room addition, updating your electrical wiring may be necessary. It is important to get the house assessed to see if the electrical wiring needs to be completely redone The average cost of rewiring a home is $3,000, but the cost can range from $1,500 to $10,000. These costs range based on the size and age of your property, the rooms that need to be rewired, and the quantity of wire that has to be replaced. They also include the cost of labor and supplies.