The consumer unit replacement
covers the agreed enclosure, protective devices, reconnection of suitable existing circuits, circuit identification and verification of the completed work.
Consumer units & fuse boards · W4
Consumer unit replacement in Chiswick W4
An older fuse box, a kitchen refurbishment or findings from an electrical inspection can all prompt the same question: what needs to change at the consumer unit?
PEP provides consumer unit and fuse box replacement in Chiswick W4. We assess the installation, specify the replacement and make clear which work concerns the board itself, which repairs are necessary and whether additional circuits are part of the job.
You do not need to be renovating the whole house. A standalone replacement receives the same attention to assessment, testing and a properly documented handover.
Assessment · Replacement · Testing & certification
Domestic Installer SchemeExisting installation
assessed before replacement
Installation, testing
and documentation
Establish the reason for changing the board
Perhaps the fuse box has remained untouched while the rooms around it have changed. You may have inherited an installation with little documentation, or an inspection report may have identified improvements to the protection.
The first decision is whether replacing the board addresses the actual requirement. Damage, unsuitable protective arrangements and planned circuit additions can justify a change. Repeated tripping, however, may originate in an appliance or wiring fault that needs its own investigation.
The appearance of an older board is not enough to settle the question. Age or a plastic enclosure alone does not establish that replacement is necessary. We consider the equipment and the installation together, then explain the work that follows from that assessment.
Replacement · repairs · additions
One quotation, three clearly defined parts
It helps to distinguish between work that is often grouped under the phrase “fuse board upgrade”.
Necessary repairs
address defects or deficiencies that affect the replacement. These might concern an existing circuit, earthing or protective bonding. They are not the same thing as supplying a new board and should be identified in the proposed scope.
Additional circuits
serve new requirements, such as equipment introduced during a kitchen refurbishment. They involve their own design and installation work rather than simply occupying an empty position in the consumer unit.
PEP sets out these distinctions so you can understand the proposal and compare it with the work you actually need. If further issues emerge during the job, we explain their implications and agree how they will be addressed.
An individual quotation
Consumer unit replacement cost in Chiswick
A useful quotation describes the completed installation, not just the price of the box.
The cost of a fuse box replacement depends on the number and condition of the circuits, the protective arrangement, access to the existing equipment and any associated repairs. Moving the board or adding supplies for new equipment changes the scope further.
When reviewing the proposal, you should be able to identify:
- the consumer unit and protection being provided;
- which existing circuits are included;
- any agreed repairs or additional circuits;
- arrangements for access and supply isolation;
- inspection, testing and completion documentation.
A photograph helps us prepare for the discussion, but it cannot establish the condition of concealed wiring. We explain what assessment is needed before confirming the work and price. Where something depends on further investigation, that should be stated rather than hidden within a general allowance.
Plan the board around the work
Bring the planned equipment into the discussion
An induction hob, a second oven and a utility room may change the electrical requirements of a refurbishment. A later phase might introduce different heating equipment or a garden workspace.
Share the appliance information and any confirmed plans while the replacement is being considered. We can assess the proposed demand, circuit requirements and board arrangement together, including what can reasonably be accommodated for a known later phase.
Spare spaces in a consumer unit do not, by themselves, mean that the incoming supply or existing wiring can support another load. Nor does fitting a larger board automatically increase the power available to the property.
For work extending beyond the consumer unit, our electrical services in Chiswick can form part of the wider project discussion.
Protection selected for the installation
The specification should explain how the circuits will be protected, not simply describe the replacement as “modern”.
RCD protection
detects certain leakage currents and disconnects the supply to reduce the risk of electric shock. In some arrangements, one RCD serves several circuits.
An RCBO
combines residual-current and overcurrent protection for an individual circuit. Separating circuits in this way can limit the extent of an interruption when a fault occurs.
Surge protection
helps protect equipment against transient overvoltages. It performs a different function from the devices protecting against earth-leakage faults and overloads.
PEP considers the protective devices, circuit arrangement and applicable requirements of BS 7671 as a single specification. The choice should suit the installation being handed over, including any agreed new work.
Access · sequence · power interruption
Choose the right time for the changeover
A standalone fuse board replacement can be planned around access to the home. During a refurbishment, the timing also needs to fit the electrical work taking place elsewhere.
Changing the board before the new circuit requirements are settled can lead to avoidable alterations. Leaving the decision until joinery and finishes are complete may make access more difficult. We discuss the sequence before the appointment is fixed.
The work requires an interruption to the affected installation’s electricity supply. Let us know about home-working arrangements, refrigeration, heating controls or equipment that cannot be left without power without further planning.
Access is needed beyond the cupboard containing the board: inspection and testing can involve electrical points throughout the property. In a flat, access to meters or shared areas may also need to be arranged with the managing agent or freeholder.
Retain suitable wiring; define any wider work
Replacing a consumer unit does not automatically mean replacing the wiring throughout the house.
The assessment establishes which existing circuits can be retained and whether defects need attention before reconnection. If a circuit is unsuitable, installing a new protective device is not a substitute for addressing the problem.
Where the findings point towards selected circuit replacement or more extensive work, we explain that separately. Our house rewiring service in Chiswick covers the broader decision about renewing the installation.
The finished scope should leave no ambiguity about what has been replaced, what has been retained and what remains outside the agreed work.
Leave with records that explain the work
At completion, the new arrangement should be understandable as well as tested. Circuits are identified, the controls explained and the relevant results recorded.
Your Electrical Installation Certificate (EIC) records the work carried out, together with its inspection and test results. An Electrical Installation Condition Report (EICR) has a different purpose: reporting on the state of the existing installation within an agreed inspection scope.
For a domestic consumer unit replacement in England, Building Regulations notification is required. PEP arranges this for the work we carry out, alongside the relevant compliance documentation.
Keep the certificate, circuit information and compliance records together. They provide a useful reference for future electrical work and questions about what was completed.
Chiswick · W4 · nearby addresses
Consumer unit replacement across Chiswick and W4
PEP welcomes enquiries from houses and flats throughout Chiswick’s W4 postcode district, including Bedford Park, Turnham Green, the Glebe Estate, Old Chiswick and Chiswick Mall.
We also cover Grove Park in Chiswick, Strand-on-the-Green, Gunnersbury, Chiswick Park and Acton Green. The starting point may be a board inside fitted joinery, a hallway cupboard or a separate utility space; the location and access are useful details to include with your enquiry.
For nearby addresses towards Stamford Brook and Hammersmith in W6, Acton in W3 or Brentford and Kew Bridge in TW8, send the full postcode so we can confirm arrangements for your property.
Our consumer unit replacement service in London explains the wider service and coverage.
01Can you replace an old fuse box without rewiring the house?
Often, yes, provided the existing circuits are suitable for continued use with the proposed protection. The assessment determines whether the work can remain a board replacement or needs associated repairs. A new consumer unit should not be presented as a substitute for renewing defective wiring.
02Does a new consumer unit increase the power available to my home?
No. It changes the distribution and protection within the installation; it does not automatically increase the incoming supply capacity. Significant new loads need to be assessed against the supply and circuit arrangements, even if the replacement board has spare positions.
03Can you allow for a planned kitchen or extension?
Yes. Provide the layout, equipment specifications and proposed timing. Those details help establish the circuit requirements and suitable board arrangement. We distinguish an agreed future phase from an idea that has not yet been designed, so the specification has a clear basis.
04Do I need an EICR before the replacement?
Electrical Safety First recommends an EICR ahead of a planned consumer unit replacement. A separate full report is not a universal legal prerequisite, but appropriate checks before the work remain essential. If you already have an EICR, send it with your enquiry so its findings can inform the scope.
05What happens if testing identifies a fault in an existing circuit?
We explain the finding and the work needed to address it. A circuit that cannot safely be reconnected may have to remain disconnected until repairs are completed. This is one reason to assess the installation before the changeover rather than assume that every circuit can simply be transferred.
06Can the new board stay in the same cupboard?
Possibly, subject to a suitable position, sufficient space and safe access. The dimensions and layout of the new enclosure may differ from the old one. Send a photograph showing the surrounding cupboard or joinery, not just a close-up of the switches.
07How long will the electricity need to be off?
We discuss the anticipated interruption once the installation and scope have been assessed. Circuit count, access, testing and any necessary repairs affect the programme. Tell us in advance about equipment or household needs that require specific arrangements while the supply is isolated.
08Which certificates and records will I receive?
For the replacement, you receive an EIC with the relevant inspection and test records, circuit identification and the associated Building Regulations compliance documentation. These relate to the completed work; they do not mean that all existing wiring has been replaced or every unrelated inspection finding resolved.
Talk to PEP
Tell us about the board and what you want to change
Whether you are replacing a tired fuse box or including a consumer unit upgrade in a Chiswick refurbishment, we can help establish the next step.
Send your full postcode, property type and reason for considering replacement. Add any electrical report, planned appliance changes and a photograph of the board and surrounding space, without removing covers.
PEP will review the information and explain the assessment needed for a clear, property-specific quotation.