Quick answer: average rewire costs
£3,000–£8,000
How Much Does It Cost to Rewire a House in the UK? (2026 Price Guide)
Planning electrical upgrades and wondering about rewiring house cost UK estimates? This guide explains realistic 2026 prices, warning signs you need a rewire, consumer unit upgrades, and Part P regulations.
Affiliate disclosure: This article contains affiliate links. If you buy through our links, we may earn a small commission at no extra cost to you. This does not affect our editorial recommendations. See our editorial policy.
Before rewiring starts
- Ask whether "making good" (plastering) is included in the quote.
- Confirm you will receive an EIC (Electrical Installation Certificate).
- Agree socket and switch positions room-by-room.
- Consider moving out for 3–5 days to reduce labour time.
1) Average rewiring costs by house size
When homeowners ask how much to rewire a house, size is the biggest factor. More rooms mean more circuits, more cable, and more labour.
| Property Type | Cost Estimate (2026) | Time to Complete |
|---|---|---|
| 1-Bed Flat | £2,000 – £3,000 | 3–4 Days |
| 2-Bed Terraced House | £3,000 – £4,500 | 4–6 Days |
| 3-Bed Semi-Detached | £4,500 – £6,000 | 6–10 Days |
| 4-Bed Detached | £5,500 – £8,000 | 8–12 Days |
| 5-Bed / Large Home | £7,500 – £12,000+ | 2–3 Weeks |
Note: These prices assume the property is empty or furniture is moved. If electricians have to work around heavy furniture in an occupied home, expect labour costs to increase by 20–30% due to the extra time involved.
2) Signs Your House Needs Rewiring
Electrical wiring degrades over time. If your property hasn't been rewired in the last 25–30 years, it may be unsafe or non-compliant. Look for these warning signs:
Critical Warning Signs
- Old Fuse Box: If you have a wooden backboard, cast iron switches, or re-wireable ceramic fuses, your system is dangerously outdated.
- Round-Pin Sockets: Sockets with round pins (instead of rectangular) indicate wiring from the 1950s or earlier.
- Rubber or Fabric Cabling: Black rubber or fabric-coated cables crumble over time, exposing live wires. Modern cable is grey or white PVC.
- No RCD Protection: Modern consumer units have RCDs (Residual Current Devices) that trip instantly to prevent electric shock. If you don't have these, your family is at higher risk.
Common Nuisance Signs
- Flickering Lights: Can indicate loose connections or arcing.
- Burning Smell: Fishy or plastic burning smells near sockets are a fire hazard sign.
- Discoloured Sockets: Brown scorch marks on white sockets suggest overheating.
- Frequent Tripping: If your fuses blow or breakers trip regularly, the circuits may be overloaded or faulty.
Unsure? Get an EICR.
An Electrical Installation Condition Report (EICR) costs £150–£300. An electrician will test your entire system and give you a pass/fail certificate with a list of urgent repairs (C1/C2 codes).
An Electrical Installation Condition Report (EICR) costs £150–£300. An electrician will test your entire system and give you a pass/fail certificate with a list of urgent repairs (C1/C2 codes).
3) What does a full rewire include?
A full rewire is a major renovation project. It involves replacing all fixed wiring, upgrading the safety devices, and often adding new convenience features. A standard quote usually covers:
- Preparation: Lifting floorboards, chasing channels into walls for cables.
- First Fix: Installing new back boxes and running cables to all points (lights, sockets, cooker, shower).
- Second Fix: Connecting switches, sockets, and light fittings once plastering is done.
- Consumer Unit Upgrade: Installing a new metal-clad fuse board with RCBO/SPD protection.
- Earthing & Bonding: upgrading main earth bonding to gas and water pipes.
- Testing & Certification: Issuing a Part P compliance certificate and EIC.
What is usually NOT included: Plastering (making good the wall channels), painting, and final cleaning. Always clarify "making good" in your contract.
4) Consumer Unit (Fuse Box) Upgrade Cost
Sometimes you don't need a full rewire, just a new consumer unit to improve safety. This is a common job for updating 1980s/90s homes.
Cost: £350 – £600
This includes:
- Removal of old fuse box.
- Installation of new 18th Edition metal consumer unit.
- RCBO protection (individual circuit breakers with shock protection).
- SPD (Surge Protection Device) to protect sensitive electronics.
- Full testing of all circuits.
Note: An electrician cannot install a new board on unsafe wiring. If they find major faults during testing, they may refuse to upgrade the board until rewiring is done.
5) Part P Building Regulations Explained
In the UK, domestic electrical work is controlled by Part P of the Building Regulations. This law ensures that electrical work is safe and won't cause fires or shocks.
What you need to know:
- Notifiable Work: Major jobs like rewiring, installing a new circuit, or working in "special locations" (bathrooms) must be notified to Building Control.
- Use a Registered Electrician: A registered electrician (NICEIC, NAPIT, ELECSA) can "self-certify" their work. They issue a Building Regulations Compliance Certificate directly.
- DIY Risks: If you do it yourself, you must pay your local council (£200–£400) to inspect it. It's rarely worth it.
- Selling Your Home: Solicitors will ask for the Part P certificate for any electrical work done since 2005. Without it, you may have to pay for an indemnity policy or a new EICR.
6) Room-by-Room Rewiring Cost Breakdown
Rewiring is your chance to add sockets where you actually need them. Below is a cost breakdown by room and property size:
| Room / Area | Cost Range (Inc Labour) |
|---|---|
| Kitchen (New circuits, cooker, appliances) | £1,200 – £2,500 |
| Bathroom (Lighting, shaver, fan) | £800 – £1,500 |
| Bedroom (Sockets, lighting) | £400 – £800 |
| Living Room (Media points, lighting) | £500 – £1,000 |
| Full House (3-Bed) | £3,500 – £5,500 |
| Full House (4-Bed) | £5,000 – £8,000 |
Tip: Always request double sockets with USB ports in bedrooms and kitchens—the extra material cost is small (£5–£10 per socket) but adds huge convenience.
7) Electrical Installation Condition Report (EICR)
If you aren't sure whether you need a full rewire, an EICR is the first step. This is an in-depth inspection of your property's electrical health.
- Cost: £150 – £300 (depending on property size).
- Landlords: Legally required every 5 years for rental properties.
- Homebuyers: Highly recommended before exchanging contracts to avoid a £5k bill later.
The report uses observation codes:
- C1 (Danger Present): Immediate risk of injury. Power must be turned off.
- C2 (Potentially Dangerous): Urgent remedial work required.
- C3 (Improvement Recommended): Non-compliant with latest regs, but not immediately dangerous (e.g., plastic fuse box).
Essential Electrical Safety & Testing Gear
Whether you've just had a rewire or are checking an old property, these inexpensive tools give you peace of mind.
🛒 Recommended Safety Kit
- Martindale Socket Tester — £15 — Plug this into any socket to check if it's wired correctly. Essential for checking a new home before buying.
- Masterplug RCD Safety Adaptor — £12 — Use this with lawnmowers and hedge trimmers if your fuse box is old. It cuts power instantly if you cut the cable.
- Kidde Carbon Monoxide Alarm (Digital) — £25 — While not electrical, this is critical if you have gas appliances. Don't ignore it.
- Non-Contact Voltage Tester Pen — £10 — Safely check if a wire is live without touching it. Great for DIY enthusiasts changing a light fitting.
As an Amazon Associate, NearbyTraders earns from qualifying purchases.
8) Frequently asked questions
How much does it cost to rewire a 3-bed house 2026?
Expect to pay £4,500 – £6,000 for a standard 3-bed semi-detached house. This includes a new consumer unit, testing, and certificate, but usually not re-plastering.
How long does a full house rewire take?
A full rewire typically takes 5 to 10 days for a 3-bedroom house, assuming the property is empty. If the house is occupied and full of furniture, it can take up to 2 weeks due to the extra time needed to lift floorboards and move items safely.
Do I need to replaster after rewiring?
Yes. Electricians channel cables into the walls ("chasing"), which leaves deep grooves. Most quotes include "bonding" (filling the chase with rough plaster) but not the final skim finish. You will likely need a plasterer to make the walls smooth before decorating.
How do I find a qualified electrician near me?
Look for electricians registered with a "competent person scheme" like NICEIC, NAPIT, or ELECSA. This ensures they can self-certify their work under Part P regulations. Always ask to see their ID card and check their registration online.
Is rewiring covered by home insurance?
Generally, no. Rewiring is considered maintenance, which is the homeowner's responsibility. However, if old wiring causes a fire, your insurance may pay out—but only if you can prove the system was well-maintained (e.g., had a recent EICR). If you knowingly ignored dangerous wiring, your claim could be rejected.
Do I need to move out during rewiring?
It is highly recommended. Rewiring is dusty, noisy, and leaves you without power for long periods. Moving out for 1 week can speed up the job by 30% and save you money on labour.
Does rewiring add value to a house?
Yes. A rewired home with a modern certificate is easier to sell and mortgage. It can increase value by £3,000–£5,000 and prevents buyers from negotiating the price down due to "unsafe electrics".
Can I rewire my own house?
Legally, yes, but you must notify Building Control before starting and pay significant fees for them to inspect it. Most DIY rewires fail inspection. It is cheaper and safer to hire a registered electrician.
What is an EICR?
An Electrical Installation Condition Report (EICR) is a safety check. Landlords must have one every 5 years. Homeowners should get one every 10 years or when buying a property.