House Rewiring Cost Calculator
Get an instant estimate for your property rewiring project
Estimated Rewiring Cost
Cost Breakdown
What Does This Mean?
This estimate includes full replacement of wiring, sockets, switches, a new consumer unit (fuse box), testing, and certification. The final cost may vary based on your specific property layout and local electrician rates.
We recommend obtaining at least three quotes from qualified electricians registered with organisations such as NICEIC, NAPIT, or ECA to compare prices and services.
What Affects House Rewiring Costs?
Property Size
Larger homes require more cable, sockets, and light fixtures, which increases both material and labour costs. A 5-bedroom house will cost significantly more than a 1-bedroom flat.
Property Type
Detached houses often cost more due to their size, whilst flats may be cheaper but could involve additional coordination with building management.
Accessibility
Empty properties are easier and quicker to rewire than occupied ones. Difficult-to-access wiring behind solid walls or finished rooms increases labour time and costs.
Property Age
Older properties often require more extensive work to bring wiring up to current standards. Pre-1970 homes may have outdated systems that need complete replacement.
Location
Labour rates vary across the country. London and the South East typically have higher electrician costs compared to Northern regions.
Additional Features
Smart home features, LED downlights, outdoor sockets, and EV charging points add to the overall cost but can improve property value and functionality.
Average Rewiring Costs by Property Type
| Property Type | Typical Cost Range | Duration |
|---|---|---|
| 1-Bedroom Flat | £3,000 – £4,800 | 3-4 days |
| 2-Bedroom Property | £3,500 – £5,800 | 4-6 days |
| 3-Bedroom House | £4,000 – £8,000 | 5-8 days |
| 4-Bedroom House | £5,500 – £9,000 | 7-10 days |
| 5-Bedroom House | £7,500 – £12,500 | 10-14 days |
Signs Your Home Needs Rewiring
Recognising when your property requires rewiring is important for safety and compliance. Watch for these warning signs:
- Frequent electrical trips or blown fuses that occur regularly
- Discoloured or scorched sockets and switches indicating overheating
- Burning smells or sparking from outlets when plugging in appliances
- Flickering or dimming lights throughout the property
- Old-fashioned wiring systems such as rubber or fabric-insulated cables
- Lack of earth bonding or outdated fuse boxes
- Insufficient sockets leading to overuse of extension leads
- Property age exceeding 30-40 years without previous rewiring
What’s Included in a Full House Rewire?
A complete rewiring project typically involves several key elements that work together to create a safe, modern electrical system:
- Complete removal of outdated wiring throughout the property
- Installation of new cables meeting current regulations (typically 2.5mm² and 1.5mm² twin and earth)
- Replacement of all sockets, switches, and light fittings
- New consumer unit (fuse box) with RCD protection and MCBs
- Earth bonding to gas and water supplies for safety
- Electrical Installation Condition Report and certification upon completion
- Testing to confirm compliance with BS 7671 wiring regulations
- Making good plasterwork where cables are chased into walls
How to Prepare for a House Rewire
Proper preparation can help minimise disruption and reduce costs. Consider these steps before work begins:
- Clear access to all rooms, removing furniture from walls where possible
- Take down pictures, mirrors, and wall decorations to prevent damage
- Cover furniture and belongings with dust sheets to protect from plaster dust
- Arrange alternative accommodation if possible, especially for occupied properties
- Plan for temporary loss of power during certain stages of work
- Discuss cable routing and socket placement with your electrician beforehand
- Consider future needs such as home office data points or smart home infrastructure
- Notify neighbours about potential noise and disruption
Regulations and Certification
House rewiring in the UK must comply with Part P of the Building Regulations and BS 7671 wiring standards. All electrical work should be carried out by a qualified electrician registered with an approved body such as NICEIC, NAPIT, ELECSA, or ECA.
Upon completion, you should receive an Electrical Installation Certificate confirming the work meets current safety standards. This documentation is important for insurance purposes and may be required when selling your property. The certificate should detail all circuits installed, test results, and confirmation of compliance with regulations.
Most local authorities require notification of electrical work through Building Control. Registered electricians can self-certify their work, saving you the additional cost and administrative burden of separate building control approval.
Frequently Asked Questions
The duration depends on property size and complexity. A typical 3-bedroom house takes 5-8 days, whilst larger 5-bedroom properties may require 10-14 days. Empty properties are generally quicker to rewire than occupied ones, as electricians have unrestricted access.
Whilst possible, it’s challenging and disruptive. You’ll face power outages, dust, noise, and limited access to rooms. Many homeowners choose to stay with family or arrange temporary accommodation. If you must remain, discuss a phased approach with your electrician to minimise disruption.
Most rewiring involves chasing cables into walls, which requires making good afterwards. Electricians typically patch plaster to a basic finish, but you’ll likely want to redecorate affected rooms. Budget for painting and potentially wallpapering to restore your home’s appearance.
Standard home insurance typically doesn’t cover routine rewiring as it’s considered maintenance. However, if rewiring is needed due to an insured event like fire or flood damage, your policy may contribute. Check your specific policy terms and speak with your insurer.
A modern, certified electrical system is attractive to buyers and can increase property value by 5-10%. It removes a major concern during surveys and demonstrates proper maintenance. Properties with outdated wiring often face reduced offers or require price reductions.
Electrical systems typically last 25-30 years before requiring replacement. However, this varies based on usage, quality of original installation, and maintenance. Properties over 30 years old without previous rewiring should have an Electrical Installation Condition Report to assess safety.
Choose electricians registered with approved schemes such as NICEIC, NAPIT, ELECSA, or ECA. These organisations require members to demonstrate competence and regular assessment. Registered electricians can self-certify work and provide necessary documentation without separate building control involvement.
Partial rewiring is possible for specific circuits or rooms, particularly if other areas were recently updated. However, if your home has widespread outdated wiring, a full rewire is more cost-effective and ensures consistent safety standards throughout the property.