If your old fuse box has rewireable fuses, no RCD protection, visible damage, or it keeps tripping, you may be wondering how much it costs to install a consumer unit in its place. In many UK homes, re
If your old fuse box has rewireable fuses, no RCD protection, visible damage, or it keeps tripping, you may be wondering how much it costs to install a consumer unit in its place. In many UK homes, replacing a consumer unit is a straightforward one-day job, but the final price depends heavily on the condition of your existing wiring.
As a broad 2026 guide, a standard consumer unit replacement usually costs around £600 to £1,000, including labour, a modern board, testing and certification. Smaller flats may come in below this, while larger homes, rental properties with several circuits, or jobs that uncover electrical faults can cost more.
The safest way to price the job is to compare quotes from qualified local electricians. HaMuch helps you do that with real, transparent pricing by trade and location, so you can check whether a quote looks sensible before you agree to the work.
Typical consumer unit replacement costs in the UK
A consumer unit replacement is not simply a case of swapping one box for another. The electrician must test the circuits, fit the new unit, make sure each circuit is protected correctly, and provide the right paperwork afterwards. That is why quotes vary.
| Type of consumer unit job | Typical price range |
|---|---|
| Small flat or simple replacement | £450-£750 |
| Standard 2 to 3 bedroom house | £600-£1,000 |
| Larger home or more circuits | £900-£1,500+ |
| Replacement plus fault-finding or remedial work | From £1,000, depending on the issue |
These figures are a guide, not a fixed price. VAT, parking, access, emergency callouts, and the type of consumer unit specified can all affect the quote. If you are comparing prices in London, Birmingham or Manchester, it is worth checking current local electrician rates on HaMuch before booking, as labour costs can differ noticeably between areas.
What is included in the cost?
A good quote for replacing a consumer unit should be clear about what is included. If the quote is very cheap, check that it covers testing and certification, not just fitting the box.
Usually, the price should include:
- Supplying a suitable modern consumer unit
- Removing the old fuse box or consumer unit
- Connecting the existing circuits to the new board
- Testing the circuits before and after installation
- Labelling the circuits clearly
- Providing an Electrical Installation Certificate
- Part P notification where required in England and Wales
Ask the electrician to put this in writing. It makes quotes easier to compare and helps avoid surprises later.
Why do prices vary so much?
The biggest reason consumer unit replacement costs vary is the condition of the existing electrical installation. A newer home with tidy wiring may be straightforward. An older property with damaged cables, missing earthing, overloaded circuits, or DIY alterations may need extra work before it can safely be connected to a new board.
The number of circuits also matters. A small flat may only have a handful of circuits. A larger house may have separate circuits for lighting, sockets, cooker, shower, outbuildings, electric vehicle charging, garden power or loft conversions. More circuits mean more protective devices, more testing and more time.
The type of board fitted can also change the price. Some modern boards use RCBOs, which protect individual circuits. This can be more expensive than a basic setup, but it may reduce disruption if one circuit develops a fault. Surge protection may also be recommended, especially where sensitive electronics, home offices or rental compliance are part of the picture.
Location is another factor. Parking, travel time and local labour rates can all increase costs, particularly in busy city areas. This is why a quote that looks high in one area may be normal in another, and why comparing local prices matters more than relying on a single national average.
Do you need an EICR before replacing a consumer unit?
You do not always need a separate Electrical Installation Condition Report before a consumer unit replacement, but an electrician must test the installation as part of the job. If there are signs of poor wiring, repeated tripping, old rubber or fabric-insulated cables, or unknown DIY work, an EICR may be a sensible first step.
An EICR checks the safety of the existing installation and highlights defects. For landlords, this can be particularly important. In England, private landlords must have electrical installations inspected and tested at least every five years under the Electrical Safety Standards in the Private Rented Sector Regulations. If you want to understand inspection pricing before replacing a board, HaMuch has a separate guide to how much an EICR costs.
For homeowners, an EICR can also prevent an unpleasant surprise. If the electrician discovers faults during the consumer unit replacement, they may not be able to reconnect unsafe circuits until the problem is fixed.
Consumer unit replacement or full rewire?
Replacing the consumer unit improves protection and brings the fuse box area up to a modern standard, but it does not automatically fix old or unsafe wiring around the home. If the wiring itself is failing, the electrician may recommend remedial work or, in more serious cases, a rewire.
This is especially common in older properties that have had decades of additions, alterations or partial upgrades. Warning signs include old-style fuse wire, brittle cable insulation, frequent tripping, scorch marks, buzzing fittings, or sockets and lights that behave unpredictably.
A full rewire is a much larger project than replacing a consumer unit. If your electrician suggests it, ask them to explain which test results led to that recommendation. For a sense of how property size and access can affect a bigger electrical project, see HaMuch’s guide to the cost to rewire a house in London.
How long does it take to replace a consumer unit?
Most straightforward consumer unit replacements take around half a day to a full day. The power will need to be turned off while the electrician works, so plan around that if you work from home or have tenants in the property.
A more complicated job may take longer if the electrician finds faults, needs to upgrade bonding, has to improve access, or must trace poorly labelled circuits. Landlords and property managers should also allow time for arranging access, notifying tenants and keeping copies of certificates.
If you need the work completed urgently, ask whether the quote includes an emergency or short-notice premium. It is better to know this upfront than to discover it on the final invoice.
Is replacing a consumer unit notifiable work?
In England and Wales, replacing a consumer unit is generally classed as notifiable electrical work under Part P of the Building Regulations. That means the work must be carried out and certified correctly. The government’s Approved Document P explains the rules for electrical safety in dwellings.
In plain English, you should use a qualified electrician who can either self-certify the work through a competent person scheme or arrange the correct notification. Rules differ in Scotland and Northern Ireland, so ask your electrician what applies where you live.
After the work, keep the certificate safe. You may need it if you sell the property, remortgage, make an insurance claim, or prove compliance for a rental home.
How to compare consumer unit replacement quotes
When comparing quotes, do not just choose the lowest number. A cheap quote that excludes testing, certification, fault-finding or VAT may end up costing more than a clearer quote that includes everything from the start.
A reliable quote should explain the type of consumer unit being fitted, how many circuits are included, whether surge protection is included, whether remedial work is excluded, and what paperwork you will receive. It should also confirm whether the electrician is registered to certify the work.
If two quotes are far apart, ask each electrician to clarify what they have allowed for. Sometimes the difference is due to one electrician allowing for a better board or more thorough testing, while another is only pricing the simplest possible swap.
HaMuch is useful here because it lets you compare local electricians, genuine customer reviews and transparent pricing before you decide. That is far more helpful than relying on vague national averages that do not reflect your property or location.
Ways to keep the job straightforward
You cannot safely cut corners on electrical work, but you can make the job easier to price and complete. Before the electrician visits, clear access to the fuse box, make a note of any tripping or electrical problems, and mention any recent building work, new sockets, kitchen upgrades or garden power.
If you are a landlord, collect previous certificates if you have them. If you manage several properties, it may be worth asking for a consistent specification across your rental portfolio so future maintenance is simpler.
Avoid asking an electrician to “just fit the board” without testing. The testing is what proves the installation is safe. A proper consumer unit replacement should leave you with better protection, clearer labelling and paperwork you can rely on.
Frequently Asked Questions
How much does it cost to replace a consumer unit? Most standard UK consumer unit replacements cost around £600 to £1,000. Smaller flats may cost around £450-£750, while larger homes or jobs with extra remedial work can cost £900-£1,500 or more.
Can I replace a consumer unit myself? No, this is not a DIY job. Replacing a consumer unit involves live electrical safety, testing, certification and Building Regulations requirements. Always use a qualified electrician.
How long does a consumer unit replacement take? A straightforward replacement usually takes half a day to a full day. It can take longer if the electrician finds faults, poor earthing, old wiring or circuits that need extra investigation.
Will a new consumer unit stop my electrics tripping? It depends on the cause. A modern unit may make faults easier to identify, but if tripping is caused by a damaged appliance, faulty cable or overloaded circuit, that problem still needs fixing.
Do landlords need to replace old fuse boxes? Not automatically, but landlords must make sure the electrical installation is safe and properly inspected. If an EICR identifies an unsafe or outdated fuse box, replacement may be needed to meet legal duties.
Does the quote include certification? It should, but always check. A proper consumer unit replacement should include testing and an Electrical Installation Certificate, plus the correct Building Regulations notification where required.
Compare consumer unit replacement quotes with HaMuch
Replacing a fuse box is safety-critical, so it pays to compare more than one electrician before booking. With HaMuch, you can check real local pricing, read genuine customer reviews and request quotes from vetted electricians for free, with no obligation to book.
If you are planning a consumer unit replacement in London, Birmingham, Manchester or elsewhere in the UK, start by comparing local electrician quotes through HaMuch and make your decision with clearer pricing from the beginning.