How much does it cost to rewire a 3-bedroom house in the UK?

A full rewire of a typical 3-bedroom semi-detached house in the UK costs between £5,000 and £7,500 in 2026, including materials, labour, a new consumer unit, and all required testing and certification. This price assumes a standard installation with a reasonable number of circuits and accessories (sockets, switches, light fittings), standard cable routes, and accessible loft and floor void spaces. Costs at the lower end of the range apply to properties with good access (e.g. suspended timber floors that can be lifted, accessible loft space, surface-run cables in garages or outbuildings), while costs at the upper end apply to properties with solid floors, multiple storeys, complex layouts, or extensive plastering requirements. In London and the South East, expect to pay 15-25% more. These prices are for the electrical work only — making good (plastering, decorating) is usually an additional cost unless you agree an all-inclusive package with the electrician.

How long does a full house rewire take?

A full house rewire typically takes between 5 and 10 working days for a standard domestic property, depending on the size and complexity of the installation. A 2-bedroom terraced house might take 5-6 days, while a 4-bedroom detached house could take 8-10 days or more. This timeframe covers first fix (chasing walls, running cables, fitting back boxes, installing containment), consumer unit installation, second fix (fitting sockets, switches, light fittings, connecting appliances), and initial verification testing plus certification. The work is usually done in two phases: first fix takes the majority of the time (3-6 days) and is the most disruptive, involving chasing walls, lifting floorboards, and running cables through the loft. Second fix (1-2 days) is less disruptive and involves fitting the visible accessories. If the property has solid concrete floors, no loft access, or particularly complex layouts, the timeline can extend significantly — sometimes to 2-3 weeks for a large or difficult property.

Do I need to move out during a rewire?

You do not strictly need to move out during a rewire, but most homeowners find it much easier to do so, particularly during the first fix phase. During first fix, the electrician will be chasing walls (creating channels for cables using an SDS drill or wall chaser, which generates a lot of dust and noise), lifting floorboards, working in the loft, and running cables throughout the property. The power supply will be disconnected for periods, and there will be debris, dust, and restricted access throughout the house. Some electricians can work room by room, maintaining power to parts of the house while working on others, but this is slower and more expensive. If you choose to stay, expect significant disruption for the first fix period (3-6 days). The second fix phase is much less disruptive — you can usually remain in the house while sockets, switches, and light fittings are installed and connected. If moving out is not feasible, discuss the work schedule with your electrician in advance so you can plan around the most disruptive phases.

Is a rewire covered by home insurance?

A standard rewire is not covered by home insurance. Home insurance covers damage caused by insured events (fire, flood, storm, theft) — it does not cover the cost of upgrading or replacing installations that have deteriorated through age and normal wear. However, there are specific situations where insurance may be relevant. If your existing wiring causes a fire and the property needs rebuilding, the insurance would cover the rebuilding costs including new wiring as part of the reinstatement. If an EICR identifies dangerous wiring (C1 or C2 observations) and this leads to damage, your insurer may have views on whether the situation was a known risk that should have been addressed. Some insurance policies now require a satisfactory EICR as a condition of cover, particularly for older properties or buy-to-let properties. If your insurer requires remedial electrical work following an EICR, the cost of that work is your responsibility as the property owner. The rewire itself is a planned improvement to your property and is entirely at your own cost. Some homeowners fund rewires through savings, personal loans, or by adding the cost to a mortgage if they are purchasing or remortgaging a property that needs electrical work.

How do I know if my house needs a full rewire?

The definitive way to determine whether your house needs a rewire is to have a qualified electrician carry out an Electrical Installation Condition Report (EICR). The EICR will identify any defects, dangerous conditions, or areas that do not comply with current regulations, and the classification codes (C1, C2, C3, FI) will indicate the severity and urgency of any issues. However, there are several warning signs that suggest a rewire may be needed: the presence of old-style round-pin sockets, fabric-covered (rubber-insulated) wiring, lead-sheathed cables, or a wooden-backed fuseboard — these indicate pre-1960s wiring that is almost certainly past its safe service life. Frequent blown fuses or tripped MCBs, flickering lights, burning smells from sockets or switches, scorch marks around outlets, and buzzing or crackling sounds from the wiring are all warning signs. If your property still has a rewirable fuse board (with wire fuses rather than MCBs or RCBOs), the installation is likely old enough to need a rewire. As a general guide, electrical installations have a design life of 25-30 years, and any wiring over 30 years old should be inspected by a qualified electrician to determine whether a rewire is necessary.

Can I rewire my house myself?

Technically, there is no law that prevents a homeowner from carrying out their own electrical work, including a rewire. However, a full rewire is notifiable work under Part P of the Building Regulations in England and Wales, which means you must either be registered with a competent person scheme (NICEIC, NAPIT, ELECSA) to self-certify the work, or you must notify your local authority building control department before starting and arrange for their inspection on completion. If you are not a qualified electrician, you cannot join a competent person scheme, which means you would need to use the building control route — and they will require the work to be inspected and tested to BS 7671 standards. In practice, a DIY rewire is strongly inadvisable. Electrical work that is not carried out to a competent standard is a serious fire and electrocution risk. Incorrect cable sizing, inadequate fault protection, poor connections, and non-compliant earthing arrangements can all cause fatal consequences. A professional electrician will design the installation correctly, use appropriate materials, test every circuit thoroughly, and issue the required certification. The cost of a professional rewire is a small price for the safety of your household.

COST GUIDE

House Rewire Cost UK 2026: What You Should Actually Pay

Honest, detailed pricing for a full house rewire in the UK. Average costs by property size, what affects the price, what is included, how long it takes, and the certificates you must receive. Updated for 2026.

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16 min readUpdated 2026-06-10Andrew Moore, Founder of Elec-Mate

Written and reviewed by Andrew Moore, founder of Elec-Mate, against BS 7671:2018+A4:2026, IET Guidance Note 3 and the IET On-Site Guide.

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Key Takeaways

1A full house rewire in the UK costs between £2,500 and £10,000+, depending on the size of the property, number of storeys, accessibility, and location.
2The most common rewire costs are: 1-bed flat £2,500-£4,000, 2-bed house £3,500-£5,500, 3-bed house £5,000-£7,500, 4-bed house £7,000-£10,000+.
3A rewire is notifiable work under Part P of the Building Regulations — the electrician must be registered with a competent person scheme or notify building control.
4An Electrical Installation Certificate (EIC) must be issued on completion of a rewire, confirming the new installation complies with BS 7671.
5A full rewire typically takes 5-10 working days depending on property size, with the homeowner usually needing to move out or live without power in sections of the house.

01 · Cost Guide

Average Rewire Costs in the UK (2026)

The cost of a full house rewire depends primarily on the size of the property, the number of circuits and accessories required, and your location. Here are the average costs for 2026, based on standard installations with a reasonable specification.

Average Rewire Costs by Property Size

1-bed flat: £2,500-£4,000 (3-5 days)
2-bed terraced house: £3,500-£5,500 (5-7 days)
3-bed semi-detached house: £5,000-£7,500 (6-8 days)
4-bed detached house: £7,000-£10,000+ (8-12 days)
5-bed+ large detached: £10,000-£15,000+ (10-15 days)

These prices include materials (cables, consumer unit, accessories), labour, testing, and the Electrical Installation Certificate (EIC). They assume a standard specification — basic white plastic sockets and switches, standard cable routes, and accessible floor and ceiling voids. Upgraded accessories (brushed chrome, antique brass, smart switches), additional circuits (EV charger preparation, home office, garden lighting), or complex cable routes will increase costs.

London and the South East typically add 15-25% to these prices, reflecting higher labour rates and operating costs. Rural areas may also command a premium if electricians have to travel significant distances. For a personalised quote, contact at least three local electricians registered with a competent person scheme.

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02 · Cost Guide

What Affects the Cost of a Rewire

The wide price ranges quoted above reflect the many factors that influence the cost of a rewire. Understanding these factors helps homeowners assess whether a quote is reasonable, and helps electricians price the work accurately.

Key Cost Factors

Property size and number of rooms: More rooms mean more circuits, more cable, more accessories, and more labour. A 4-bed house might have 12-16 circuits, while a 2-bed flat might have 6-8.
Number of storeys: Multi-storey properties require more cable (vertical runs between floors), more containment, and more time accessing different levels. A 3-storey townhouse costs significantly more than a single-storey bungalow of similar floor area.
Access and floor construction: Suspended timber floors allow cables to be run through the void without disturbing the finish. Solid concrete floors require surface-run cables, mini-trunking, or breaking into the concrete — all of which add cost and time.
Property age and condition: Older properties may have lath and plaster walls (harder to chase), limited or no floor voids, asbestos-containing materials (requiring specialist removal), and other complications that increase cost.
Specification: The number and type of accessories (sockets, light fittings, switches, USB sockets, outdoor sockets), style of accessories (basic white plastic vs premium finishes), and any additional circuits (EV preparation, home office, garden, outbuildings) all affect cost.
Location: Labour rates vary significantly by region. London electricians charge £280-£350/day while rates in Wales or the North East might be £200-£260/day. This difference alone can account for 15-25% of the total cost.
Making good: Whether plastering and decorating is included in the quote or arranged separately. Some electricians include basic making good; others leave the plastering and decorating to the homeowner or a separate tradesperson.

03 · Cost Guide

What Is Included in a Full Rewire

A full rewire replaces the entire fixed electrical installation in the property — everything from the consumer unit to the accessories on the walls and ceilings. Here is exactly what should be included.

What a Rewire Includes

New consumer unit: A modern consumer unit with RCBOs (or dual-RCD split-board) compliant with BS 7671:2018+A4:2026. RCBO boards are now the preferred option as they provide individual RCD protection for each circuit, avoiding nuisance tripping affecting the whole house.
All new circuit cables: Twin and earth (6242Y) in the appropriate sizes — 2.5mm for socket circuits, 1.5mm for lighting, 6mm or 10mm for showers, 6mm for cookers, plus protective conductors for bonding. All cables run through chased channels, under floors, or through the loft.
New accessories: All sockets, light switches, ceiling roses, fused connection units (spurs), cooker switches, shower pull cords, and any other accessories specified in the quote.
Earthing and bonding: Main protective bonding to gas, water, and oil (if applicable), plus supplementary bonding where required. The earthing system must be verified and upgraded if necessary.
Smoke and heat detectors: Under the current Building Regulations, a rewire triggers the requirement for a Grade D1 fire detection and alarm system — interlinked smoke detectors in hallways and landings, plus heat detectors in kitchens.
Initial verification testing: Every circuit must be tested — continuity of protective conductors (R1+R2), insulation resistance, polarity, earth fault loop impedance (Zs), prospective fault current (PFC), and RCD operation times.
Electrical Installation Certificate (EIC): The formal certificate confirming the new installation complies with BS 7671. This must be issued by the electrician on completion and a copy given to the homeowner. It is also required for Part P notification.

When comparing quotes, check exactly what is included. Some electricians quote for first fix only (cables and back boxes) with second fix priced separately. Others include making good (basic plastering of chased channels) while many do not. Ensure you understand what is and is not included before accepting a quote.

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04 · Cost Guide

First Fix vs Second Fix

A rewire is carried out in two distinct phases: first fix and second fix. Understanding the difference helps homeowners plan for the disruption and helps electricians coordinate with other trades.

First Fix

First fix is the most disruptive phase. It involves:

Removing the old wiring and consumer unit
Chasing walls for new cable routes
Lifting floorboards to run cables under floors
Running cables through the loft space
Installing back boxes for sockets and switches
Fitting containment (conduit, trunking) where needed
Installing the new consumer unit
Running all circuit cables and bonding conductors

Duration: 3-6 days depending on property size

Second Fix

Second fix is carried out after plastering. It involves:

Fitting all faceplates to sockets and switches
Installing ceiling roses and light fittings
Connecting the cooker, shower, and other appliances
Fitting smoke and heat detectors
Final connections in the consumer unit
Initial verification testing of all circuits
Completing the EIC certificate
Demonstrating the installation to the homeowner

Duration: 1-3 days depending on property size

There is often a gap between first fix and second fix to allow the plasterer to make good the chased channels and any other damage to walls and ceilings. This gap can be a few days to a few weeks, depending on the plasterer's availability. The electrician should not carry out second fix until the plaster has dried — fitting accessories into wet plaster can cause problems with moisture ingress and premature corrosion.

05 · Cost Guide

How Long Does a Rewire Take

The total duration of a rewire depends on the size and complexity of the property. Here are realistic timescales for different property types.

Typical Rewire Durations

1-bed flat: 3-5 working days (2-3 first fix, 1-2 second fix)
2-bed terraced house: 5-7 working days (3-5 first fix, 2 second fix)
3-bed semi-detached: 6-8 working days (4-6 first fix, 2-3 second fix)
4-bed detached: 8-12 working days (5-8 first fix, 3-4 second fix)
5-bed+ large property: 10-15+ working days

These timescales are for the electrical work only. The total project duration from start to finish will be longer once you factor in the plastering gap between first fix and second fix (typically 1-3 weeks depending on plasterer availability), any additional trades needed (flooring, decoration), and scheduling around the homeowner's needs.

Some electricians work alone, while others bring a mate or apprentice to speed things up. A two-person team can typically complete a rewire 30-40% faster than a single electrician, which may offset the higher labour cost if the homeowner wants the work done quickly.

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06 · Cost Guide

Do You Need to Move Out During a Rewire

This is one of the most common questions homeowners ask, and the honest answer is: you do not have to, but life will be much easier if you can. Here is what to expect if you stay.

What to Expect If You Stay

Dust and debris: Chasing walls produces significant amounts of dust. Even with dust sheets and extraction, the dust gets everywhere. If anyone in the household has asthma or respiratory conditions, moving out during first fix is strongly recommended.
Noise: Wall chasing and SDS drilling are extremely loud and can last several hours per day during first fix.
Power outages: The electrician will need to disconnect the power supply for periods during the work. They can sometimes arrange temporary supplies to essential rooms, but there will be periods without power.
Restricted access: Rooms being worked on will have floorboards up, cables hanging from ceilings, and tools and materials everywhere. You will need to stay out of these areas.

If you do stay, discuss the work plan with your electrician. A good electrician will work room by room where possible, maintaining power to habitable areas and minimising disruption. They should provide a clear schedule so you know which rooms will be affected on which days. Consider staying with family or friends for the worst 2-3 days of first fix and returning for the rest of the work.

07 · Cost Guide

Part P Building Regulations and Certificates

A full rewire is notifiable work under Part P of the Building Regulations in England and Wales. This means the work must either be carried out by an electrician registered with a competent person scheme (who can self-certify the work) or the homeowner must notify the local authority building control department before starting and arrange for their inspection.

Certificates You Should Receive

Electrical Installation Certificate (EIC): The primary certificate confirming the new installation complies with BS 7671. It includes a schedule of test results for every circuit, design details, and a declaration by the installer, designer, and inspector. You must receive a copy of this certificate on completion of the work.
Building Regulation Compliance Certificate: If the electrician is registered with a competent person scheme, they notify the scheme of the completed work and a Building Regulation Compliance Certificate is issued. This confirms the work complies with Part P and is registered with the local authority. You should receive this within a few weeks of completion.

Keep both certificates safe. You will need them when selling the property — conveyancing solicitors routinely request evidence of Part P compliance for any electrical work carried out since 2005. Missing certificates can delay or jeopardise a property sale. If you have had work done without proper certification, you can arrange a retrospective EICR to demonstrate that the current installation is safe, although this does not replace the original EIC.

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08 · Cost Guide

Signs You Need a Rewire

Not every property needs a full rewire. Many older installations can be upgraded, repaired, or partially replaced without stripping everything out and starting again. However, there are clear warning signs that indicate a full rewire is the safest and most cost-effective option.

Warning Signs

Old round-pin sockets: These indicate pre-1947 wiring. The installation is almost certainly unsafe and past any reasonable service life.
Fabric-covered or rubber-insulated wiring: Used from the 1950s to 1970s. The insulation degrades over time and becomes brittle, creating a fire and shock risk.
Lead-sheathed cables: Common in pre-1960s installations. The lead sheath can crack and expose live conductors.
Wooden-backed or rewirable fuse board: A fuseboard with rewirable fuses (wire fuses rather than MCBs) indicates an old installation. While the fuses themselves may still work, the age of the installation means the wiring is likely degraded.
Frequent blown fuses or tripped MCBs: Can indicate overloaded circuits, deteriorating cable insulation, or poor connections — all of which may point to the need for a rewire.
Burning smells, scorch marks, or buzzing: These are serious warning signs of overheating connections or cables. Switch off the affected circuit and call a qualified electrician immediately.
No RCD protection: If your installation has no RCD (residual current device) protection at all, it lacks a critical safety feature. While an RCD can often be added via a consumer unit upgrade, the absence may indicate broader issues with the installation's age and condition.
Unsatisfactory EICR: If an EICR has returned an Unsatisfactory result with multiple C1 or C2 observations, and the remedial work would be extensive, a full rewire may be more cost-effective than piecemeal repairs.

The definitive way to know whether you need a rewire is to have a qualified electrician carry out an EICR. The report will identify all defects and observations, and the electrician can then advise whether a full rewire is necessary or whether targeted repairs and upgrades will suffice.

09 · Cost Guide

For Electricians: Pricing Rewires Accurately

Rewires are one of the highest-value jobs a domestic electrician can take on, but they are also one of the most commonly underquoted. Getting the pricing right is essential — underquote and you work long days for slim margins; overquote and you lose the job to a competitor.

Rewire Pricing Checklist

Survey the property thoroughly: Count every socket, switch, and light fitting. Check the floor construction (suspended timber or solid concrete). Check loft access. Measure cable runs. Note any complicating factors (solid walls, limited access, listed building restrictions).
Cost materials accurately: Cable quantities (measure, do not guess), consumer unit, accessories, back boxes, fixings, containment, bonding conductors, fire detection. Add 10-15% wastage allowance. Get trade prices from your usual supplier.
Estimate labour realistically: Use your experience of similar jobs. Add time for the unexpected — old properties always throw up surprises. If you are working alone, the job will take longer than if you have a mate.
Include overheads: Van costs, insurance, scheme membership, test equipment calibration, accountancy — these must be covered by every job. Calculate your overhead cost per day and add it to the quote.
Add profit margin: You are running a business, not a charity. A 15-25% profit margin on top of costs is standard for domestic electrical work. This is what allows you to invest in the business, save for quiet periods, and build financial security.

The most common pricing mistake on rewires is underestimating labour. A 3-bed semi rewire that you quote at 6 days might take 8 days once you account for the solid floor in the kitchen extension, the loft access that requires removing insulation, and the two trips to the wholesaler for additional materials. Build in a contingency or price for the realistic scenario, not the best case.

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Frequently Asked Questions About Rewire Costs

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House Rewire Cost UK 2026: What You Should Actually Pay

Key Takeaways

Average Rewire Costs in the UK (2026)

Average Rewire Costs by Property Size

AI Cost Engineer for Rewire Quotes

Get the BS 7671 A4:2026 Cheat Sheet — free

What Affects the Cost of a Rewire

Key Cost Factors

What Is Included in a Full Rewire

What a Rewire Includes

EIC Certificate in the App

First Fix vs Second Fix

First Fix

Second Fix

How Long Does a Rewire Take

Typical Rewire Durations

Price the job in minutes, not evenings

Do You Need to Move Out During a Rewire

What to Expect If You Stay

Part P Building Regulations and Certificates

Certificates You Should Receive

EIC Certificate Built Into the App

Signs You Need a Rewire

Warning Signs

For Electricians: Pricing Rewires Accurately

Rewire Pricing Checklist

AI Cost Engineer Prices Rewires for You

Cable Sizing and Voltage Drop Calculators

Frequently Asked Questions About Rewire Costs

How much does it cost to rewire a 3-bedroom house in the UK?

How long does a full house rewire take?

Do I need to move out during a rewire?

What is included in a full rewire?

Is a rewire covered by home insurance?

How do I know if my house needs a full rewire?

Can I rewire my house myself?

Continue reading

House Rewire Guide

Consumer Unit Regulations

Cable Sizing Calculator

EIC Certificate

Part P Building Regulations

Electrical Quoting App

What electricians say

One App for Everything!

Fantastic app for electricians

Absolutely amazing

Trusted by electricians across the UK

Price rewires accurately with Elec-Mate