In 2024, a consumer unit upgrade in the UK typically costs between £400 and £1,000 for most domestic properties, though the final figure depends on a handful of factors I'll cover in detail below. As a qualified electrician working across North East England, I put this guide together so you know exactly what you're paying for — and what to watch out for.
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Most people still call it a fuse box, and that's fine — but a consumer unit is the modern version: the metal or plastic enclosure that distributes electricity around your home and contains the protective devices (MCBs, RCDs, or RCBOs) that cut the power if something goes wrong.
Older fuse boxes often contain rewirable fuses or early MCBs with no RCD protection. They're not necessarily dangerous today, but they don't meet current standards and they won't protect people as effectively as a modern installation.
Common reasons homeowners upgrade:
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Here are realistic price ranges I'd quote in the North East. Prices in London and the South East tend to run higher; rural areas can vary either way.
| Type of Installation | Approximate Cost Range |
|---|---|
| Dual RCD consumer unit (standard domestic) | £400 – £600 |
| Fully loaded RCBO consumer unit | £600 – £900 |
| RCBO board with surge protection device (SPD) | £700 – £1,000+ |
| Larger properties or complex rewires | £900 – £1,500+ |
These figures generally include labour, materials, and the Electrical Installation Certificate you legally need at completion. They don't include any remedial work flagged during the job — more on that below.
I'd be cautious of quotes under £350. At that price, either the materials are being cut, the cert is questionable, or the electrician isn't registered with a competent person scheme like NAPIT or NICEIC. That matters for your buildings insurance and for Part P Building Regulations compliance.
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Several things move the price up or down:
Type of consumer unit — A basic dual RCD consumer unit is cheaper in parts than a fully loaded RCBO board. The RCBO version offers better fault discrimination (each circuit has its own combined protection), which is the preferred approach under the BS 7671 18th Edition Wiring Regulations and particularly since Amendment 2 came into force.
Number of circuits — More circuits means more protective devices and more time to test. A one-bedroom flat with eight circuits is a different job to a four-bedroom house with sixteen.
Condition of the existing installation — If the cable terminations are old and brittle, tails need extending, or the earthing arrangement needs updating, those are legitimate additional costs.
Access and meter position — If the meter is in an awkward location or the main tails need replacing, expect the price to reflect that.
Surge protection — Since Amendment 2 to BS 7671, SPDs are required or must be offered and refused in writing in most domestic installations. A surge protection device adds to the material cost.
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A properly quoted consumer unit upgrade should include:
What it typically won't include: fixing pre-existing faults on circuits, rewiring old sockets or switches, or dealing with issues found during testing that weren't visible beforehand.
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Since 2016, BS EN 61439 has effectively made metal consumer units the standard for new domestic installations. The requirement is about fire containment — if there's an arc fault inside the unit, a metal enclosure contains it far better than plastic.
A metal enclosure typically adds £30–£80 to the material cost compared with a plastic unit. Any registered electrician should be fitting metal as standard in 2024. If someone quotes you a plastic board, ask why.
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Not always — but it's worth discussing with your electrician. An EICR (Electrical Installation Condition Report) is a full periodic inspection of your installation. If you have no recent EICR, it can make sense to carry one out before upgrading the consumer unit, so you know what condition the rest of the wiring is in.
The last thing you want is to spend £700 on a new consumer unit and then discover three months later that the wiring behind the walls needs attention.
For rental properties, an EICR is a legal requirement every five years under the Electrical Safety Standards in the Private Rented Sector (England) Regulations 2020. A consumer unit upgrade doesn't replace an EICR — they're different documents for different purposes.
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For a standard domestic property, half a day to a full day is typical — usually four to eight hours. Larger properties or those with complications take longer.
You'll have no electricity during the work, so plan around that. The supply comes back on before the electrician leaves, and testing is completed the same day.
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Landlords often need a consumer unit upgrade off the back of an EICR that's returned Category 2 or Category 1 observations about the fuse board. Under the 2020 regulations, remedial work must be completed within 28 days of the inspection report (or sooner if specified). The landlord electrical safety certificate — properly, the EICR — needs to show the remediation has been done.
For landlords with multiple properties, it's worth talking to your electrician about volume pricing. At Energy North Ltd we work with a number of landlords across the North East and pricing can reflect an ongoing relationship.
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A few practical points:
You're not just buying a box on the wall. You're buying the protection of your property, your family, and your ability to make an insurance claim if something goes wrong.
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How much does a consumer unit upgrade cost in the UK in 2024?
Most domestic consumer unit upgrades fall between £400 and £1,000, depending on the type of board, number of circuits, and any additional work required. Get a written, itemised quote from a registered electrician.
How long does it take to replace a consumer unit?
Typically four to eight hours for a standard domestic property. Your electricity will be off during the work and restored before the electrician leaves.
Do I need a new consumer unit to install an EV charger?
Not always, but often. If your existing board is full, very old, or lacks adequate RCD protection, most reputable EV charger installers will require or strongly recommend an upgrade first. It's worth getting an assessment before committing to an EV charger installation.
Is a consumer unit upgrade required by law for landlords?
Not automatically — but if an EICR identifies the consumer unit as a Category 1 or Category 2 defect, you're legally required to remedy it within the timescales set out in the 2020 regulations. A poor consumer unit will almost always result in an unsatisfactory EICR.
Can I stay in my home while the consumer unit is being replaced?
Yes. You'll just need to work around having no power for most of the day. In cold weather, bear that in mind if you have electric heating. The electrician will restore power before leaving.
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If you're in North East England and want a straight, honest quote for a consumer unit upgrade — or you're not sure whether your installation needs attention — get in touch with us at [Energy North Ltd](https://energynorth.uk). We'll tell you what the job actually involves before we give you a price.