Rewiring a house is one of the biggest electrical jobs a homeowner can face. It's also one of the most important — outdated wiring can be a fire risk and may not meet current regulations. Here's a realistic guide to what it costs in the UK in 2026.
Typical Costs by Property Size
The figures below are estimates based on typical UK prices. Actual costs vary by location, the condition of existing wiring, and the complexity of the job.
| Property Type | Typical Cost Range | Typical Duration |
|---|---|---|
| 1-bed flat | £2,500 – £4,000 | 3 – 5 days |
| 2-bed flat / house | £3,500 – £5,500 | 5 – 7 days |
| 3-bed semi-detached | £5,000 – £7,500 | 6 – 10 days |
| 4-bed detached | £7,000 – £10,000 | 8 – 12 days |
| 5+ bed / large property | £10,000 – £15,000+ | 10 – 15+ days |
Note on pricing
These figures include labour and standard materials (wiring, sockets, switches, consumer unit). They don't typically include making good — replastering and redecorating after the wiring is installed. Budget an additional 15–25% for that.
What Affects the Cost?
No two rewiring jobs are the same. Here are the main factors that push the price up or down.
Property size and layout
More rooms means more circuits, more sockets, and more cable runs. Multi-storey properties generally cost more because wiring needs to run vertically between floors, which adds complexity.
Age and condition of existing wiring
Older properties (especially pre-1960s) often have wiring that's harder to remove and replace. If the existing wiring is embedded in plaster or run through inaccessible routes, the electrician may need to take a different approach — which takes more time.
Number of circuits and sockets
A standard rewire includes a set number of circuits, sockets, and light points. If you want additional sockets, USB outlets, outdoor circuits, or dedicated circuits for electric showers or cookers, each adds to the cost.
Consumer unit (fuse board)
A full rewire almost always includes a new consumer unit. A modern unit with RCD protection typically costs £300–£600 as part of the rewire. If your current unit is relatively new and compliant, this may not be needed.
Location
Prices are generally higher in London and the South East compared to other parts of the UK. The difference can be 20–40% for the same scope of work.
Access difficulties
Properties with limited loft access, solid walls instead of stud walls, or concrete floors will cost more to rewire because running cables is significantly harder.
What's Included in a Full Rewire?
A standard full rewire typically includes:
- Removal of all old wiring throughout the property
- Installation of new wiring to all rooms
- New consumer unit (fuse board) with RCD protection
- New sockets, light switches, and light fittings (or reuse of existing fittings)
- Smoke alarm wiring (mains-linked smoke alarms are required under current regulations)
- Testing and certification on completion
- An Electrical Installation Certificate (legally required)
Do I Actually Need a Full Rewire?
Not always. A full rewire is typically needed when:
- The wiring is more than 25–30 years old
- An EICR (Electrical Installation Condition Report) has flagged serious issues
- You're doing a major renovation and the walls will be opened up anyway
- The existing wiring uses old rubber-insulated cable or aluminium wiring
- You're experiencing frequent tripping, blown fuses, or flickering lights
In some cases, a partial rewire or circuit upgrade may be sufficient and significantly cheaper. A qualified electrician can assess your property and advise whether a full rewire is genuinely needed.
How to Get a Fair Quote
- Get at least 3 quotes — This gives you a realistic range and helps you spot outliers
- Insist on a written, itemised quote — Not a verbal estimate. It should list exactly what's included.
- Check the electrician is registered — NICEIC or NAPIT registration is essential for a full rewire
- Ask about making good — Will they replaster and fill chases, or is that your responsibility?
- Confirm what certificates you'll receive — You should get an Electrical Installation Certificate on completion
- Clarify the payment schedule — A deposit + staged payments + final balance on completion is standard
Watch out for
Be cautious of any quote that's dramatically lower than others. A full rewire is labour-intensive and requires quality materials. If someone is quoting 40% below everyone else, it's worth asking why — and checking their credentials carefully.
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