Upgrade your old fuse box to a modern consumer unit. NICEIC registered electricians across London — post a job free.
Full fuse box upgrade to a modern 18th Edition compliant board with RCDs and RCBOs. Metal enclosure required. Part P certificate issued on completion.
Get fuse box quotes →Assessment of existing consumer unit and wiring condition before replacement. Identifies any additional work needed before the new board can be fitted.
Get fuse box quotes →Fitting of Residual Current Devices providing whole-house protection against electric shock and fault current. Mandatory in all new consumer unit installations.
Get fuse box quotes →Building Regulations compliance certificate issued on completion of the consumer unit replacement. Required for property sales, remortgages, and insurance.
Get fuse box quotes →Full circuit test before and after the consumer unit replacement. Identifies any faults in existing circuits that need to be addressed before the new board is connected.
Get fuse box quotes →EV charger circuit, electric shower circuit, or additional kitchen ring main added at the same time as the consumer unit replacement — saving time and cost.
Get fuse box quotes →| Job | Low estimate | High estimate |
|---|---|---|
| Consumer unit replacement (8-way) | £400 | £600 |
| Consumer unit replacement (12-way) | £500 | £800 |
| Consumer unit + full circuit test | £600 | £900 |
| Add EV charger circuit during upgrade | £200 | £400 |
| Add electric shower circuit | £150 | £300 |
| Part P certificate | Included | Included |
Prices are estimates for London 2026. Costs vary by board size, number of circuits, and any additional work identified during circuit testing. Always get multiple quotes.
Describe the fuse box upgrade and your London postcode. Note the size of your existing board if known. No account required — takes under 2 minutes.
NICEIC and NAPIT registered electricians covering your postcode see your job and message you directly with their availability and pricing.
Review quotes and messages from each electrician. Book directly with the one that suits you — no obligation, no booking fee.
Fuse box upgrades — or consumer unit replacements — are one of the most common electrical jobs in London. A significant proportion of the capital's Victorian and Edwardian housing stock still has old-style fuse boards fitted with re-wireable fuses rather than modern miniature circuit breakers (MCBs) and residual current devices (RCDs). Re-wireable fuses provide no protection against earth faults or shock current, and do not trip quickly enough to prevent a fire in the event of a wiring fault. Modern consumer units with RCDs and RCBOs provide whole-circuit protection and respond to faults in milliseconds.
In London, fuse box upgrades are most commonly triggered by three events: a mortgage application or remortgage (where the lender or surveyor requires a modern consumer unit), a property sale (where conveyancers or buyers request an updated electrical installation), and an EICR inspection that returns an Unsatisfactory result citing the old consumer unit. Landlords with older properties also frequently upgrade boards to comply with their legal obligations under the Electrical Safety Standards in the Private Rented Sector regulations. The 18th Edition of the wiring regulations (BS 7671) requires all new consumer units in domestic premises to have a metal enclosure — an important fire protection measure. All consumer unit replacements are notifiable under Part P and must be carried out by a registered electrician.
Free to post. No subscription. No hidden fees. NICEIC registered electricians across all London boroughs — usually responding within hours.