If your fuse box is playing up, or an electrician has recommended an upgrade, the first question most homeowners ask is: how much is this going to cost?
Consumer unit replacement in the UK typically costs between £350 and £750, depending on the size of the unit, the type of circuit breakers fitted, and where you live. For most homes, the job comes in at around £485 for a standard 10-way RCBO consumer unit — including all labour, materials, and certification.
This guide covers everything you need to know about consumer unit replacement costs: what drives the price up or down, what the job actually involves, and what to watch out for when getting quotes.
How Much Does It Cost to Replace a Consumer Unit?
Consumer unit replacement costs in the UK typically fall between £350 and £750 for a complete installation. Here are typical price ranges based on the type of unit:
| Consumer Unit Type | Estimated Cost (Inc. Labour) |
|---|---|
| 6-way unit (small flat / outbuilding) | £300–£420 |
| 10-way RCBO consumer unit (most homes) | £450–£550 |
| High integrity consumer unit | £550–£680 |
| 16-way unit (larger property) | £620–£750+ |
These figures cover the unit, circuit breakers, labour, testing, and your electrical installation certificate. If your wiring needs remedial work at the same time, budget for additional costs on top.
What Affects the Cost of Replacing a Consumer Unit?
Number of Circuits
The more circuits in your home, the bigger the consumer unit needs to be — and the more individual circuit breakers are required. A small flat might only need a 6-way unit, while a 4-bedroom house could need 12 ways or more. Each additional way adds to the overall materials cost.
Type of Consumer Unit
There are three main types of consumer unit used in UK homes today:
- Dual RCD consumer unit — Two RCDs protect groups of circuits. A fault on one RCD can knock out several circuits at once — a real inconvenience.
- High integrity consumer unit — Circuits are split across more RCDs, reducing the number of circuits affected if something trips.
- RCBO consumer unit — Each circuit has its own RCBO (a combined miniature circuit breaker and RCD). This is the gold standard for protection, and what most qualified electricians now fit as standard.
RCBO consumer units cost slightly more in materials, but they offer significantly better protection and are increasingly the expected choice for new installations.
Location
Labour rates vary across the UK. If you’re in London or the South East, expect to pay toward the higher end of the range. In the Midlands, Nottinghamshire, Derbyshire, and South Yorkshire, fuse box replacement costs tend to be more competitive.
Additional Electrical Work
Sometimes a consumer unit swap isn’t straightforward. If your wiring is old or in poor condition, your electrician may identify issues that need addressing before or during the installation. An Electrical Installation Condition Report (EICR) is often recommended alongside a consumer unit upgrade in older properties — ask your electrician about bundling the two together for a combined price.
What’s Included in the Consumer Unit Replacement Cost?
A complete, properly quoted consumer unit installation should include:
- Labour — typically 4–6 hours for a standard domestic job
- Materials — the consumer unit itself, RCBOs or MCBs, and any associated components
- Testing — all circuits tested to BS 7671 wiring regulations
- Electrical installation certificate — issued on completion, confirming the work is safe and compliant
- Part P building notification — required by law for this type of work (more on this below)
If a quote doesn’t mention certification and notification, treat it with caution.
Is Consumer Unit Replacement Notifiable Work?
Yes. Replacing a consumer unit is notifiable electrical work under Part P of the Building Regulations in England and Wales. It must be carried out by a qualified, Part P-registered electrician.
Electricians registered with schemes such as NICEIC can self-certify their own work and notify Building Control on your behalf — so you don’t have to deal with it as a separate process. Once the job is complete, you’ll receive an electrical installation certificate, which matters for your buildings insurance and when you come to sell your property.
Using an unregistered person to replace a consumer unit isn’t just risky — it can invalidate your home insurance and cause serious problems on sale.
How Long Does Consumer Unit Replacement Take?
Most consumer unit replacements take 4 to 6 hours for a qualified electrician to complete. The job involves isolating the supply, removing the existing unit, installing the new consumer unit, reconnecting and labelling all circuits, and carrying out thorough testing before restoring power.
For larger properties or where additional remedial work is needed, the job may take a full day. Your power will be off for most of the duration — worth bearing in mind when booking.
Do You Actually Need a New Consumer Unit?
Not every tripping fuse board needs a full replacement. In some cases, an individual MCB has failed and simply needs swapping. In others — particularly with older rewireable fuse boxes — a full upgrade is the safest and most sensible solution.
If you’re not sure whether yours needs replacing, read our guide: Do I Need to Upgrade My Fuse Box?
How to Get the Best Price on Consumer Unit Replacement
A few tips before you agree to any quote:
- Get at least three quotes — consumer unit installation costs vary meaningfully between electricians
- Check Part P registration — verify on the NICEIC or NAPIT register before you book
- Confirm what’s included — certification and notification shouldn’t be charged as extras
- Bundle work where possible — if you also need an EICR, ask about a combined price
- Don’t choose on price alone — a cheap quote from an unregistered electrician will cost you more in the long run
Understanding typical electrician hourly rates in the UK can also help you sense-check whether a quote is reasonable before you commit.
Consumer Unit Replacement in Worksop and the Surrounding Area
Electric-Cal Solutions is an NICEIC-registered electrician based in Worksop, Nottinghamshire. We carry out consumer unit replacements across Worksop, Mansfield, Retford, Sheffield, Doncaster, Rotherham, and the wider area.
Every installation is fully certified, notified under Part P, and backed by our workmanship guarantee. Call us today for a free, no-obligation quote.
