How Much to Rewire a House

Rewiring a house is one of the most important electrical upgrades a homeowner can undertake. It ensures the safety, reliability and efficiency of a property’s electrical system, particularly in older homes where wiring may be outdated or unsafe. While the benefits are clear, many homeowners want to understand how much it costs to rewire a house in the UK, what factors influence the price and what the process involves.

This guide explores the typical costs of a full or partial house rewire, what affects pricing, what to expect during the process and how to plan for a safe and compliant electrical installation. It is written for homeowners, landlords, renovators and property developers considering a rewire for safety, resale value or renovation.

Why Rewire a House?

Rewiring is often necessary in properties built before the 1980s, especially if the original system has not been updated. Old wiring may not meet current safety standards and can pose a risk of electrical fires or shocks. Indicators that a rewire may be needed include outdated fuse boxes, fabric-covered or black rubber wires, flickering lights or frequent tripping of circuits.

Modern homes require more electrical capacity than in the past. Rewiring allows the system to handle today’s demands, including home offices, electric heating, smart devices and high-spec kitchen appliances. It also gives homeowners the chance to future-proof the property with additional sockets, USB outlets or smart wiring infrastructure.

Typical Costs to Rewire a House

The cost to rewire a house in the UK varies depending on the size of the property, its age, the complexity of the layout and the specification of fittings. For a standard three-bedroom semi-detached house, the average cost of a full rewire ranges from £4,000 to £6,500. A one-bedroom flat might cost between £2,500 and £4,000, while a large detached property could exceed £8,000.

These costs usually include removal of old wiring, installation of new cabling, new consumer unit (fuse board), sockets, switches and light fittings. Additional costs may apply for chasing out plaster, re-plastering walls, installing specialist lighting or wiring for underfloor heating or home automation.

If only a partial rewire is needed, such as updating the kitchen or a single floor, costs will be significantly lower, but the system must still comply with the 18th Edition Wiring Regulations (BS 7671). A full rewire is typically more cost-effective and less disruptive if carried out all at once, especially during major renovations or when a property is empty.

How Long Does It Take to Rewire a House?

A full rewire usually takes 5 to 10 days, depending on the size and complexity of the property. The work is often done in two stages. First fix involves laying the cabling and wiring before plastering or decorating. Second fix is the installation of faceplates, sockets, switches and connecting everything to the consumer unit.

If you are living in the property during the work, it may take longer, and you should expect disruption. Some homeowners choose to move out temporarily, especially if the house will be without power for a few days. Planning ahead and discussing a clear schedule with your electrician helps minimise inconvenience.

Planning and Regulations

All electrical work must comply with Part P of the Building Regulations in England and Wales. This means any significant electrical installation, including a rewire, must be carried out by a qualified electrician who is registered with a competent person scheme such as NICEIC or NAPIT. The electrician will test the system and issue an Electrical Installation Certificate to confirm it meets safety standards.

In Scotland, the Building Standards system applies, and similar rules exist to ensure compliance and safety. Homeowners should always verify that the contractor holds the appropriate qualifications and public liability insurance before starting work.

Additional Considerations

A rewire is a good opportunity to redesign your electrical layout. Think about where you need extra sockets, whether you want smart home capability, how many lighting circuits you need, and whether you want to include exterior lighting, electric vehicle charging or energy-saving features like LED dimmers.

If your property is listed or in a conservation area, you may need consent for certain alterations. Always check with your local authority before starting major work, particularly if chasing wires into period walls or altering original features.

Case Example

A couple renovating a 1930s three-bedroom house in Liverpool discovered outdated wiring, old Bakelite fittings and a fuse box with rewireable fuses. They arranged for a full rewire while the property was empty. The work took nine days and cost £5,300 including new sockets, LED ceiling lights and a modern consumer unit. The rewire was completed before decorating, allowing the home to meet safety standards and accommodate a modern family’s electrical needs.

Conclusion

Rewiring a house is a significant but worthwhile investment in your property’s safety and functionality. While costs vary based on size and specification, understanding the process and planning carefully with a qualified electrician can make the experience smoother and more efficient. If your wiring is outdated or you are undertaking a renovation, a rewire provides peace of mind and long-term value for both owners and future buyers.