How Much Does It Cost to Upgrade a Fusebox in Scotland?

If you have called us asking how much it costs to upgrade a fusebox, you are not alone. It is one of the questions we get asked most often, and it is also one of the hardest to answer with a single number, because the honest answer depends on your property. In this guide we will explain exactly what drives the cost of a fusebox upgrade in Aberdeenshire, why the number of circuits in your home matters far more than the amperage of your supply, and what you can expect to pay for a proper job done to current wiring regulations.

We are Faithful Spark Electricians, based in Peterhead and working across Aberdeenshire and the wider North East. We are a NICEIC approved contractor and our electricians hold City and Guilds 2357, 2365 and 2391-52 qualifications. We have replaced fuseboards in everything from one bedroom flats in Aberdeen tenements to granite farmhouses out towards Fraserburgh and Huntly, so we have a good handle on what actually affects the price, and what does not.

What is a fusebox upgrade and what does it involve?

The term fusebox is what most people still use, but the correct name for the modern equivalent is a consumer unit. Older properties, particularly the granite tenements and farmhouses common across Aberdeenshire, were often fitted with fuseboxes that use rewireable fuses or old style circuit breakers with no residual current protection at all. These boards were fine for the electrical demands of decades ago, but they do not meet the safety standards we work to today.

A fusebox upgrade means removing that old board entirely and fitting a modern consumer unit fitted with RCBOs, which stands for residual current breaker with overcurrent protection. Each circuit in your home, whether that is your kitchen sockets, your upstairs lighting, your shower or your cooker, gets its own RCBO. This device does two jobs at once. It protects the circuit from overload and short circuit like a traditional fuse or breaker would, and it also detects earth leakage, which is what protects you from electric shock. If you want to read more about what this involves for a typical Aberdeen property, our page on a consumer unit upgrade in Aberdeen covers the practical side in more detail.

The work itself involves isolating your supply, removing the old board, fitting the new consumer unit, connecting every circuit correctly, labelling everything clearly, and testing the whole installation before it goes live again. It is not a job to rush, and it is not one to hand to anyone without the right qualifications.

Why the number of circuits matters more than amperage

This is the part that causes the most confusion, so it is worth spending time on. A lot of people ask us for a price based on their amperage, assuming that a 100A supply costs more to work on than an 80A one, or that upgrading to a higher amperage is something they need to plan for and pay extra for. In reality, amperage is almost never something you choose or need to worry about.

Your electricity supply is delivered to your meter by Scottish Power or SSEN, depending on where in Aberdeenshire you are. Almost every domestic property in the region has a single phase 100A supply, and that is simply what is provided. You do not select this, and it cannot really be upgraded in the way people upgrade a broadband package. The distribution network operator sets the supply capacity, not your electrician, and not you.

What actually changes the price of a fusebox upgrade is the number of circuits in your home. Every circuit needs its own RCBO, and RCBOs are the single biggest material cost in the job. A small one bedroom flat in Peterhead town centre might have as few as six circuits: maybe two for sockets, two for lighting, one for the cooker and one for an immersion heater or shower. A larger detached house out towards Ellon or Inverurie, especially one that has had an extension, a garage conversion or outbuildings added over the years, could easily have fourteen, sixteen or more circuits. Each additional circuit means an additional RCBO, a bit more time on site, and a bigger consumer unit to house them all. That is the real driver of cost, not the number stamped on your incoming supply.

So when you are trying to work out roughly what your own upgrade might cost, the most useful thing to do is count your circuits, or ask your electrician to do it during a quick survey, rather than worrying about amps.

What does a fusebox upgrade cost in Aberdeenshire?

We would rather give you an honest, useful answer than a misleading one, so here is how we price this work. A straightforward consumer unit replacement in a typical Aberdeenshire home starts from £550 plus VAT. That figure covers a standard domestic property with a normal number of circuits, straightforward access to the board, and no complications such as old wiring that needs attention first.

That price is a starting point, not a ceiling, and we want to be upfront about that rather than let anyone assume it is a flat rate for every home. Larger properties with more circuits will cost more, simply because more RCBOs and a bigger enclosure are needed, and there is more testing and connecting to do. A period granite house with sixteen circuits across several floors is a genuinely different job to a small modern flat with six, and the price reflects that difference fairly.

Other things that can add to the cost include a consumer unit location that is awkward to access, such as a cupboard under a stair with limited space, existing wiring or earthing that does not meet current standards, or additional circuits you want added at the same time, such as for a new kitchen or an outbuilding. A surge protection device, which we will come back to later in this guide, is another common addition. None of these figures are ceilings. They are starting points and guides based on real jobs we have carried out across Peterhead, Fraserburgh, Ellon, Inverurie and the surrounding villages, and every quote we give is based on actually seeing your property or getting enough detail from you to price it properly.

If you are also wondering whether your current installation needs checking over, an EICR is often carried out alongside or before a consumer unit upgrade, and we offer these from £150.

What is included in the price?

When we quote you a price for a fusebox upgrade, here is what that figure actually covers. It includes the new consumer unit itself, fitted with a full set of RCBOs, one for each circuit in your home, rather than a cheaper board that only protects some circuits. It includes all the labour to safely isolate your supply, strip out the old fuseboard, fit and wire the new one, and make good the immediate area around it.

It also includes full testing and certification once the work is complete. Every circuit is tested for correct polarity, insulation resistance, earth continuity and loop impedance, and you receive an Electrical Installation Certificate confirming the work meets British Standard 7671, the wiring regulations that all electrical work in the UK must comply with.

What it does not automatically include, unless agreed beforehand, is rewiring work beyond the consumer unit itself, upgrading your earthing and bonding if it does not meet current standards, or adding new circuits for future appliances. We will always flag these during a survey or the initial work if we spot something that needs attention, and price it separately so there are no surprises on the invoice.

Why full RCBO consumer units are now best practice

You may come across older style boards that use a mix of standard RCDs covering several circuits at once, sometimes called split load boards. We do not fit these anymore, and we would not recommend them to anyone having work done today. The problem with a shared RCD is that if one circuit develops a fault, it can trip the RCD and knock out every other circuit on that side of the board at the same time. That might mean your lights and your fridge freezer circuit going off together because of a fault on an unrelated socket circuit.

A full RCBO board avoids this completely, because every single circuit has its own dedicated protection device. A fault on your bathroom circuit will trip only that circuit, and everything else in the house carries on working normally. This is a much safer and more reliable way to protect a modern home, particularly one with a lot of electronics, fridges and freezers where nuisance tripping and shared faults cause real inconvenience. It is why full RCBO boards are considered best practice across the industry now, and it is the only type of consumer unit we install.

If you are dealing with an existing board that keeps cutting power unexpectedly, it is worth reading our separate guide on why your RCD keeps tripping, since this is often a sign that an upgrade is overdue.

What is BS 7671 Amendment 4 and does it affect your upgrade?

British Standard 7671 is the wiring regulation that governs all electrical installation work in the UK, and it is updated periodically to reflect improvements in safety and technology. Amendment 4 is the current update, and it becomes mandatory for all new electrical work from October 2026. We already work to it as standard, because we believe in doing the job properly rather than waiting until we are forced to.

For most homeowners having a consumer unit upgrade, this mainly affects details like the requirements around surge protection and updated guidance on cable routing and protection. You should not need to do anything differently as a customer. It simply means that when the work is finished, it is built to the standard that will remain current for years to come, rather than one that is about to be superseded.

What happens on the day of installation?

On the day, we will arrive at an agreed time and talk you through what is going to happen before we start. Your power will need to be switched off for most of the day while the work is carried out, so it is worth planning around that, particularly if you work from home or have anyone in the house who relies on medical equipment that needs power.

We isolate the supply at the meter, remove the old fusebox, and fit the new consumer unit in the same location wherever possible, or a more suitable location if the current spot is not ideal. Every circuit is disconnected from the old board and reconnected to the new one, checked, and labelled clearly so you know exactly what each RCBO controls. Once everything is wired, we carry out a full set of tests before restoring power, and we will not leave your home until we are satisfied everything is safe and working correctly.

We keep disruption to a minimum and we are tidy on site. If we uncover anything unexpected once the old board is off, such as old wiring in poor condition or non standard earthing, we will stop and talk to you about it before carrying on, rather than just working around it.

How long does a consumer unit replacement take?

Most straightforward consumer unit replacements take a single day, usually somewhere between four and eight hours depending on the number of circuits and how accessible the board is. A small flat with six circuits and easy access might be finished by early afternoon. A larger home with sixteen circuits, particularly in an older granite property where cabling can be harder to trace, may take the best part of a full working day.

If we find additional work is needed once we are into the job, such as correcting old wiring or dealing with poor earthing, we will tell you straight away and give you a clear idea of any extra time and cost involved rather than letting it become a surprise later.

What about surge protection devices?

A surge protection device, usually shortened to SPD, protects your home’s electrics from voltage spikes, most commonly caused by lightning strikes on the network or sudden switching events on the grid. These spikes can damage sensitive electronics like televisions, computers, boilers with electronic controls, and increasingly, home appliances that rely on circuit boards.

If your current board does not have one and you are having a new consumer unit fitted, this is a sensible addition, and it is something we will discuss with you as part of your quote. It adds to the overall cost of the job, but it is a relatively small outlay compared to the cost of replacing damaged appliances after a surge. Whether it is genuinely needed depends on your specific circumstances, and we will give you honest advice rather than upselling something you do not need.

Do you need an EICR before or after a consumer unit upgrade?

An Electrical Installation Condition Report, or EICR, is a thorough inspection of the electrical installation in your home, checking for damage, deterioration, defects and anything that does not meet current safety standards. It is a different document to the certificate you get after a consumer unit upgrade, because it covers your entire electrical installation rather than just the new board.

Whether you need one before or after your upgrade depends on your situation. If you are buying a property, renting it out, or simply have not had your electrics checked in a long time, an EICR beforehand can flag issues that affect how the consumer unit upgrade should be planned, such as old wiring or bonding that is not up to standard. If your main concern is just the fuseboard itself and the rest of your installation is relatively recent, we might recommend the EICR afterwards instead, as a way of confirming everything is now in good order. We offer EICRs from £150, and we are always happy to talk through which order makes sense during a quote for a consumer unit upgrade in Aberdeen.

Signs your fusebox needs replacing

There are a few common signs we see again and again across Aberdeenshire properties that suggest it is time for an upgrade. If your fusebox still uses rewireable fuses with actual fuse wire, or old cartridge fuses, rather than modern circuit breakers, it is almost certainly out of date and does not offer the protection a modern RCBO board provides.

If you have a board with a mix of circuits sharing a single RCD, and you find that tripping one circuit knocks out several others at once, that is a sign of a split load style board that would benefit from being replaced with a full RCBO unit. If your board is warm to the touch, has visible scorch marks, a burning smell, or makes buzzing or crackling noises, stop using it and get it checked urgently, as these are signs of a genuine fire risk.

Older granite properties across Peterhead, Fraserburgh and the wider North East often still have boards installed decades ago that were perfectly adequate at the time but were never designed for the number of appliances and electronics found in a modern household. If you are regularly plugging in extension leads because you do not have enough circuits, or you have had work like a kitchen extension or loft conversion added without the electrics being reviewed, it is worth having someone take a look. If you are ever unsure what is causing a repeated issue rather than a straightforward end of life board, our electrical fault finding service can get to the bottom of it before you commit to a full upgrade. And if the wiring throughout the property is genuinely old and deteriorating rather than just the board itself, a full rewire might be the more sensible long term option, which we can advise on honestly rather than just selling you a new board on top of failing cables.

Book a consumer unit upgrade in Aberdeenshire

If any of this sounds familiar, whether that is an old fusebox with rewireable fuses, a board that trips unpredictably, or simply a house that has had work done over the years without the electrics keeping pace, we are happy to come and take a look. As a NICEIC approved contractor working to British Standard 7671 Amendment 4, and holding City and Guilds 2357, 2365 and 2391-52 qualifications, we can give you a proper, honest assessment of what your home needs and a clear price based on your actual number of circuits, not guesswork.

We work across Peterhead, Fraserburgh, Ellon, Inverurie and the wider Aberdeenshire area, and all our work meets Scottish Building Standards. You can call us on 07304 027013 to arrange a survey or ask any questions about pricing, or get in touch through our website at faithfulsparkelectricians.co.uk. Whether you need a straightforward consumer unit swap or want advice on wider electrical work, our electrician in Aberdeen team is ready to help.