A full electrical rewire is one of the most significant maintenance investments a homeowner can make, but it is also one of the most important for safety when the existing installation is aged, deteriorated, or does not meet current standards. Understanding what a rewire involves and what drives the cost helps homeowners budget accurately and choose the right contractor.

What a Full Rewire Includes

A full rewire of a residential property involves replacing all of the fixed wiring in the property: the cables to every socket, every light fitting, every switch, and every hardwired appliance. It includes fitting a new modern consumer unit with residual current device protection, replacing all socket and switch faceplates with new fittings, and testing and certifying the completed installation to BS 7671. The existing wiring is isolated and either removed or left in place as dead wiring.

Cost by Property Size

For a standard two-bedroom flat or small terraced house, a full rewire typically costs two thousand five hundred to four thousand five hundred pounds. A three-bedroom semi-detached house costs three thousand five hundred to six thousand pounds. A four to five-bedroom detached house costs five thousand to nine thousand pounds or more. These ranges reflect the number of circuits, the total cable length, and the number of outlets and fittings throughout the property.

What Affects the Final Price

Properties with solid masonry walls require more chasing to route cables, which adds time and making-good cost compared with timber stud frame construction where cables can be run through stud cavities with less surface damage. Properties with high ceilings require more cable per circuit. A large number of existing light fittings and additional fittings such as external lighting, underfloor heating, or electric vehicle chargers add to the scope. Combining the rewire with other renovation works where making-good is part of a wider plastering and redecoration project reduces the double-disruption cost.

Making Good

Repairing the damage to walls and ceilings from chasing and routing new cables is a significant part of the total project cost. Some electricians include basic making good in their price; others quote for the electrical work only, leaving the customer to arrange plastering and decoration separately. Clarifying what making good is included is important when comparing quotes.

Summary

A full house rewire costs three thousand five hundred to six thousand pounds for a typical three-bedroom semi-detached house. Solid wall construction, large number of circuits, and extensive making-good requirements take costs toward the upper end. Always use a NICEIC or NAPIT-registered electrician and obtain a completed installation certificate. Timing the rewire to coincide with other renovation works reduces the overall disruption and cost.