Electrical Safety Regulations 2026: New EICR Rules for London Landlords & Housing Providers
12 July 2026
You book an EICR expecting a routine electrical safety check. A few hours later, the report arrives marked unsatisfactory, and the electrician tells you the consumer unit should be replaced.
For most property owners, the first reaction is not technical. It is practical:
Is the fuse box genuinely unsafe, or am I being sold work I do not need?
That is a fair question.
We inspect electrical installations across London, including older converted flats, Victorian houses, modern apartments, rental properties, HMOs, shops and commercial premises. We regularly see consumer units that are outdated but still serviceable. We also find boards that look acceptable from the outside but contain loose connections, overheating, exposed live parts or unsuitable protective devices.
The age of the fuse box is rarely the whole story.
What matters is what the inspection found, the risk created by those defects and whether the existing consumer unit can be repaired safely. Sometimes a relatively small repair is enough. Sometimes replacement is the only sensible option. In more complicated cases, the board is only one part of a wider electrical problem.
This guide explains how to tell the difference.
Property owners who already have an unsatisfactory report can arrange remedial work for a failed EICR certificate or use our failed EICR remedial cost estimator before approving major work.
A consumer unit often called a fuse box or fuse board is the point where electricity enters the property’s internal circuit system and is divided between the lighting, sockets, cooker, shower, heating and other fixed electrical circuits.
It also contains the protective devices intended to disconnect the supply when something goes wrong.
In an older London flat, that protection may be provided by rewireable fuses. In a later installation, the board may contain miniature circuit breakers and one or two RCDs. A newer consumer unit may provide individual RCBO protection, surge protection and clearer separation between circuits.
Modern equipment usually offers better protection and greater convenience. That does not mean every older consumer unit is automatically dangerous.
We sometimes attend properties where an owner has been told:
“It is plastic, so it fails.”
That statement is too simplistic.
A plastic consumer unit may be older than the current standard, but the inspector should still assess its condition, location, circuit protection, fire risk and accessibility. An undamaged older enclosure is not the same as a board with melted components, open cable entries or exposed live parts.
The IET’s current consumer-unit guidance illustrates the key protective features commonly found in modern boards, including metal enclosures, RCBOs, surge protection, blanking modules and circuit identification. These improvements matter, but the need to replace an existing unit must still be based on the installation’s actual condition. (IET Wiring Regulations)
That distinction can save a property owner hundreds of pounds—or prevent a serious electrical incident.
When an electrician opens a consumer unit during an EICR inspection in London, the most important findings are often not immediately visible to the property owner.
The cover might be clean. The switches may appear normal. Nothing may have tripped for years.
Inside, however, the engineer may find a terminal that has been running hot, conductors forced into unsuitable connections, mixed manufacturers’ devices, deteriorated cable insulation or circuits that have been added without adequate protection.
We are not simply asking, “How old is this board?”
We are asking:
Does it provide suitable protection for the circuits connected to it?
Are live parts properly enclosed?
Are the protective devices compatible with the consumer unit?
Are connections secure?
Is there evidence of overheating?
Is RCD protection present where required?
Are the earthing and bonding arrangements adequate?
Can suitable replacement components still be obtained?
Most importantly, can any identified defect be corrected without replacing the complete board?
This is where a proper inspection differs from a quick visual sales visit.
Imagine two consumer units of a similar age.
The first has a missing blanking plate, unclear circuit labels and one loose terminal. The enclosure is otherwise sound, compatible components remain available and the circuits test satisfactorily.
The second has a damaged main switch, discoloured conductors, heat-distorted plastic, mixed-brand breakers and no practical way to add appropriate protection using approved components.
Both boards are old.
Only one clearly needs replacing.
This is why an EICR should describe the observed defect rather than simply stating that a fuse box is “outdated”.
A repair may be reasonable where the problem is isolated and the equipment remains safe and maintainable. Examples include replacing an approved blanking piece, correcting labels, re-terminating an undamaged conductor or replacing a compatible protective device.
Replacement becomes more persuasive when several problems are present together. Extensive heat damage, obsolete equipment, unavailable components, unsafe modifications and inadequate circuit protection often make continued repair poor value.
A written quotation should explain this logic. If it does not, ask for it.
Before authorising the work, you can also use our EICR code cheatsheet to understand the observations shown on the report.
Consider a common situation involving a two-bedroom rental flat in West London.
The landlord receives an unsatisfactory EICR from a contractor who recommends a complete consumer unit replacement. The quotation is substantial, but the report itself contains very little explanation beyond a reference to the age and material of the enclosure.
A second inspection finds that the plastic consumer unit is secure and shows no evidence of overheating. The devices are compatible, the circuits test satisfactorily and appropriate RCD protection is already present.
The actual defects are a missing blanking plate and incorrect circuit identification.
Those issues can be corrected without replacing the complete board.
This is a representative example based on situations commonly encountered in London properties. The lesson is not that consumer unit replacement is unnecessary. It is that the recommendation must match the evidence.
An owner should not pay for a new board merely because the existing one is plastic, looks old or is no longer the model an electrician prefers to install.
Now consider a converted Victorian flat in North London.
From the outside, the consumer unit appears ordinary. There is no obvious damage, and the tenant has not reported regular tripping.
During the inspection, the engineer removes the cover and finds darkening around the main switch. One conductor has been poorly terminated and has generated enough heat to make the insulation brittle. Several protective devices are from a different manufacturer to the enclosure, and compatible replacement parts are no longer readily available.
In this situation, replacing only the visibly damaged component may not provide a reliable long-term repair.
A new consumer unit allows the damaged section to be removed, the circuits to be re-terminated correctly and the protection arrangement to be brought into a coherent, maintainable system.
That is not an aesthetic upgrade. It is a technical response to heat damage and unsuitable internal modifications.
One of the most frequent consumer-unit issues found during an EICR is missing or incomplete RCD protection.
An RCD monitors the flow of electricity and disconnects the circuit when it detects certain forms of leakage. This additional protection can reduce the risk of electric shock.
Many older fuse boxes do not include RCD protection. Others protect only part of the installation. A property may have RCD protection for the sockets but not the lighting, bathroom equipment or concealed cables.
Whether this creates a C2 observation depends on the circumstances and risk. The inspector should consider the circuit’s use, cable routes, connected equipment and surrounding environment rather than applying a code mechanically.
Sometimes RCD protection can be added without replacing the board. In other cases, the existing consumer unit cannot accept an appropriate compatible device.
This is one reason replacement may become the practical option: not because the board has suddenly become dangerous due to its age, but because it cannot be adapted safely to provide the required protection.
The IET notes that RCD and RCBO technology has evolved to address modern electrical installations and the effects of electronic equipment. (IET Wiring Regulations)
A consumer-unit recommendation should be connected to the classification codes shown on the report.
A C1 means danger is present. An example might be accessible live parts where someone could receive an electric shock. Immediate action may be needed, and the affected equipment might have to be isolated.
A C2 means the condition is potentially dangerous. This may include inadequate protection, a damaged enclosure, significant thermal damage or another defect that could create danger under fault conditions.
A C3 means improvement is recommended. It does not make the EICR unsatisfactory by itself. This is often the correct distinction where an installation does not reflect the latest design standard but is not considered immediately or potentially dangerous.
An FI means further investigation is required without delay because the inspector could not determine the cause or extent of a problem during the original inspection.
If the report is difficult to interpret, our guide explaining how to read an EICR report provides a clearer breakdown of the observations, codes and test information.
The code matters because it tells you whether the recommended work is urgent, necessary for a satisfactory report or simply an improvement worth considering.
A new consumer unit does not repair the rest of the electrical installation.
This sounds obvious, but it causes regular confusion.
A landlord may see several observations on an EICR, approve a new consumer unit and assume the property will automatically become satisfactory.
It may not.
The report could also identify damaged sockets, poor bathroom fittings, inadequate bonding, defective wiring, low insulation resistance, incorrect polarity or unsafe external circuits.
Replacing the board may resolve only part of the failure.
In fact, fitting a modern consumer unit can expose faults that an older fuse box did not reveal. Modern protective devices are more sensitive. Once the circuits are connected to the new board and properly tested, previously hidden neutral-to-earth faults, insulation problems or borrowed neutrals may become apparent.
A responsible quotation should therefore make two things clear:
First, what work is included in the consumer unit replacement.
Second, what happens if testing identifies faults elsewhere in the installation.
This protects both the contractor and the customer from the familiar dispute: “You quoted for a fuse-box replacement, but now you are saying more work is needed.”
A landlord approves a new RCBO consumer unit for a two-bedroom flat after the EICR identifies inadequate protection and an obsolete board.
The physical replacement proceeds normally. During testing, however, the kitchen socket circuit fails the insulation-resistance test.
The issue is traced to a damaged socket concealed behind an appliance.
The consumer unit replacement did not cause the fault. The new testing process revealed a defect that was already present.
The socket is repaired, the circuit is retested and the installation is then completed with the appropriate certification.
This is why full testing is not an optional extra. It is an essential part of the work.
When comparing quotations, ask whether circuit testing, fault diagnosis and certification are included. A cheap price that excludes them may not remain cheap for long.
The practical difference between an older dual-RCD board and a modern RCBO board becomes obvious when a fault occurs.
In many dual-RCD arrangements, several circuits share one RCD. A fault on one circuit can disconnect all the circuits within that group.
A faulty kettle may therefore switch off more than the kitchen sockets. Depending on the arrangement, it could also affect lighting, the boiler, the fridge or another unrelated circuit.
An RCBO provides overcurrent and residual-current protection to an individual circuit. If the kitchen sockets develop a fault, the remaining circuits are more likely to stay operational.
That is particularly useful in rental homes, HMOs and properties containing equipment that should not lose power unnecessarily.
It also helps with diagnosis. Instead of half the property going off and the tenant saying, “Everything has tripped,” the affected circuit is easier to identify.
This does not mean every existing dual-RCD board must be replaced. It means that where replacement is already justified, an RCBO arrangement can provide better circuit separation and reduce disruption.
Surge protection is another area where property owners receive conflicting advice.
A surge protection device helps protect the electrical installation and connected equipment from transient overvoltages. In modern homes, that connected equipment may include computers, televisions, appliances, heating controls, alarms and smart-home systems.
The IET’s guidance indicates that surge protection is now a significant part of contemporary consumer-unit design, particularly when compared with the potential cost of damage to electronic equipment. (IET Wiring Regulations)
However, the correct arrangement should be assessed for the specific installation.
The useful question is not simply, “Does the quote include an SPD?”
It is:
Has the electrician explained why this protection is appropriate, what device is proposed and how it will be incorporated into the board?
A technically sound quotation should be capable of answering that in plain English.
There is no honest universal price for replacing a consumer unit.
A small flat with six straightforward circuits is not the same job as a large house with fifteen circuits, an electric vehicle charger, outbuildings and years of undocumented alterations.
The final cost depends on the board specification, circuit count, accessibility, earthing and bonding, the condition of the existing wiring and the faults found during testing.
London also introduces practical costs that are easy to overlook: parking restrictions, congestion charges, limited loading access, managing-agent procedures, concierge arrangements and restrictions on noisy or disruptive work.
For a straightforward residential replacement, the price will normally be measured in several hundred pounds rather than the cost of a minor repair. More complex domestic and commercial projects can be considerably higher.
The best quotation is not necessarily the cheapest or the most expensive. It is the one that clearly states:
What consumer unit is being fitted
How many circuits are included
Whether RCBO and surge protection are included
Whether earthing and bonding work is required
Whether full testing is included
What certification will be issued
What happens if hidden faults are discovered
Whether parking, congestion and making good are included
For inspection pricing, see our guide to EICR certificate costs in London or use the online EICR price calculator.
For an existing failed report, the failed EICR remedial cost estimator is the more relevant starting point.
A well-planned consumer unit replacement should not feel chaotic.
Before the appointment, the electrician should review the report and confirm the likely circuit count, board location, access arrangements and whether the property is occupied.
On arrival, the existing installation is assessed before the supply is isolated. The engineer checks the main earthing arrangement, bonding, incoming equipment and the condition of the circuits entering the board.
Once the power is safely isolated, the old unit is removed and the condition of the conductors becomes clearer. This is often the moment when previous alterations or heat damage are fully exposed.
The new consumer unit is then installed, the circuits are reconnected and the labelling is completed. Each circuit must be inspected and tested before being returned to service.
A straightforward replacement may be completed within a working day. Difficult fault finding, inaccessible cables or extensive bonding work can extend the visit.
The property will be without power for part of the appointment, so occupants should plan accordingly. Refrigeration, home working, medical equipment, alarms and access systems may need specific consideration.
A proper consumer unit replacement should produce more than an invoice and a photograph.
The work should be inspected, tested and certified. For relevant domestic work, Building Regulations requirements may also apply. Approved Document P covers electrical safety in dwellings in England, and the government guidance explains the framework for notifiable electrical work. (GOV.UK)
The completion pack may include an Electrical Installation Certificate, schedules of inspection and test results, circuit details and confirmation of any applicable notification.
Where the work was completed following an unsatisfactory EICR, retain the original report together with the remedial quotation, invoice, electrical certificate and written confirmation of the defects corrected.
An invoice stating “consumer unit replaced” is not a substitute for technical certification.
Landlords and managing agents should store these records against the property address. This creates a defensible compliance trail and avoids confusion when the property is inspected again, sold or handed to a new agent.
For landlords, a failed EICR is not simply a maintenance recommendation.
Current government guidance for rented homes in England requires electrical installations to be inspected and tested at intervals of no more than five years, with remedial or further investigative work completed within the period stated in the report or within 28 days, whichever is sooner. The detailed duties depend on the property and applicable regulations, so landlords should act on the report promptly rather than waiting for the next tenancy. (GOV.UK)
The practical process is straightforward:
Read the complete report.
Identify every C1, C2 and FI observation.
Obtain a written remedial scope.
Confirm whether consumer unit replacement is necessary or simply recommended.
Authorise urgent safety work.
Collect the completion evidence.
Make sure all failed observations—not just the fuse box item—have been addressed.
Our dedicated service for EICR certificates for landlords in London supports landlords and agents with inspection, tenant access, remedial work and documentation.
For larger shared properties, see our HMO EICR certificate service.
Homeowners often approach consumer unit replacement differently from landlords.
There may be no tenancy deadline. The decision may arise during a renovation, house purchase, kitchen replacement, extension or planned electrical upgrade.
An older fuse box may be suitable for continued use today but poorly suited to the changes planned next year.
For example, a homeowner may be considering an electric shower, induction hob, garden office, heat pump or EV charger. The existing consumer unit may have insufficient capacity, no spare ways or unsuitable protective arrangements.
In that situation, replacement can be planned as part of the wider project rather than treated as an emergency.
A condition report provides a useful baseline. Our EICR certificates for homeowners in London help identify existing defects before a renovation budget is committed.
The important distinction remains the same: safety-critical work should be dealt with promptly, while optional upgrades can be planned sensibly.
Replacing a domestic fuse box may interrupt one household.
Replacing a distribution board in a commercial property may interrupt a shop, office, restaurant, server room, communal area or operational building.
The technical and commercial risks are therefore different.
Before a shutdown, the contractor may need to establish which circuits serve fire alarms, emergency lighting, refrigeration, data systems, access controls, machinery or tenant areas.
Some work must be completed outside business hours. Other projects require phased isolation so that essential systems remain available.
A commercial quotation should address continuity, access, shutdown timing, circuit schedules and reinstatement—not merely the price of the new board.
Businesses, freeholders and managing agents can arrange commercial EICR certificates in London for offices, retail premises, communal areas and other non-domestic installations.
A replacement may be entirely justified, but the explanation should withstand basic scrutiny.
Be cautious when the only reason given is that the board is old.
Ask for more detail if the contractor cannot identify the relevant EICR code.
Question a quotation that does not mention testing or certification.
Clarify whether existing circuit faults are included or charged separately.
Do not assume that fitting a new consumer unit will resolve unrelated defects elsewhere in the property.
The strongest contractors do not become defensive when asked these questions. They explain what they found, why it matters and how the proposed work corrects the risk.
Before approving a substantial consumer unit quotation, we would want clear answers to the following:
Which exact observations on the EICR require this replacement?
Is the existing unit damaged, obsolete, incompatible or simply older than the current standard?
Could the identified defects be repaired safely?
What consumer unit and protective devices are proposed?
Will the circuits have individual RCBO protection?
Is surge protection included?
Are earthing and bonding checks included?
Will every circuit be tested?
What happens if a hidden fault is discovered?
What certificate will be issued?
Does the scope address every item that caused the EICR to be unsatisfactory?
These questions are not an attempt to reduce the price at any cost. They are designed to ensure the money is being spent on the right work.
We arrange electrical inspections and remedial work throughout Central, North, South, East and West London.
The properties vary significantly. A modern Canary Wharf apartment presents different access and electrical issues from a converted Battersea house, a Kensington mansion block or an older Hampstead property.
Relevant local services include:
EICR certificates in Westminster
EICR inspections in Kensington
EICR certificates in Canary Wharf
You can also review all London areas covered by our EICR engineers.
A consumer unit replacement after a failed EICR may be essential, sensible or unnecessary.
The answer depends on the evidence.
A board with extensive heat damage, unsafe modifications, exposed live parts or obsolete incompatible components may need replacing urgently.
A serviceable older board with a minor repairable defect may not.
A new consumer unit may improve protection, circuit separation and future maintainability, but it cannot repair damaged sockets, poor bonding or defective wiring elsewhere in the property.
The right approach is to read the full report, understand the classification codes and obtain a remedial scope that addresses the installation as a complete system.
For an existing unsatisfactory report, arrange professional EICR remedial work in London.
For a property that has not yet been tested, review our complete EICR services in London.
You can also check your position with the EICR compliance checker or book an EICR inspection online.
The objective is not to sell the largest possible job.
It is to identify the actual risk, complete the correct work and leave the property with a safe, tested and properly documented electrical installation.
These answers explain when an old fuse box genuinely needs replacing, what affects the cost, which certificates should be issued and what landlords and homeowners should check before approving electrical remedial work.
No. An unsatisfactory EICR means that one or more defects classified as C1, C2 or FI have been identified, but those defects may not all relate to the consumer unit. A missing blank, loose terminal or incorrect label may be repairable without replacing the whole board.
Replacement is more likely to be justified where there is extensive heat damage, exposed live equipment, obsolete components, unsafe alterations or no practical way to provide suitable circuit protection. Before approving major work, review the report using our EICR code cheatsheet .
Yes. A consumer unit does not automatically fail because it is old or because the enclosure is plastic. The inspector should assess its actual condition, the protection provided, accessibility of live parts, evidence of overheating, earthing arrangements and circuit test results.
An older board may receive a C3 improvement recommendation without making the report unsatisfactory. However, damaged components, missing protection or unsafe previous alterations may justify a more serious code.
The cost depends on the number of circuits, consumer unit specification, RCBO protection, surge protection, accessibility, earthing and bonding, testing requirements and any faults discovered after isolation.
A small flat with a straightforward circuit arrangement will normally cost less than a large house, HMO or commercial property. London parking, congestion charges and restricted access can also affect the final price. For inspection pricing, review our EICR certificate cost guide . For an existing failed report, use the failed EICR remedial cost estimator .
It can be, but the code depends on the circuit, the way it is used and the level of risk. Missing RCD protection may be particularly significant for socket circuits, bathroom equipment, outdoor supplies or cables concealed in walls.
In some installations, suitable protection can be added without replacing the complete consumer unit. In others, the existing board may not accept compatible protective devices, making replacement the safer and more practical option.
A dual-RCD board normally divides several circuits between two shared RCDs. A fault on one circuit can therefore disconnect several unrelated circuits in the same group.
An RCBO provides overcurrent and residual-current protection to an individual circuit. If one circuit develops a fault, the remaining circuits are more likely to stay operational. This can provide better fault separation, easier diagnosis and less disruption for occupants.
No. The consumer unit is only one part of the fixed electrical installation. The EICR may also identify defective sockets, damaged light fittings, inadequate bonding, wiring faults, incorrect polarity or unsafe external circuits.
Every C1, C2 and FI observation must be reviewed. A new board may correct the consumer-unit defects but it will not automatically fix problems elsewhere. Our failed EICR remedial work service is based on the complete report rather than one isolated item.
A straightforward domestic replacement can often be completed within one working day. The property will normally be without power for part of the appointment while the old board is removed, the new unit is installed and every circuit is tested.
The work may take longer where the electrician finds damaged cables, borrowed neutrals, insulation faults, inadequate bonding or unclear circuit arrangements. Commercial properties may require phased shutdowns or out-of-hours attendance.
The contractor should issue appropriate electrical certification for the completed work. This will normally include an Electrical Installation Certificate together with schedules of inspections and test results.
Where notification is required, the relevant Building Regulations process should also be completed. Keep the original EICR, remedial quotation, invoice, electrical certificate and confirmation that the failed observations were corrected. An invoice alone is not a substitute for electrical certification.
Landlords should act promptly. The required timeframe is normally the period stated in the report or 28 days, whichever is sooner, although an immediately dangerous C1 defect may require urgent isolation or repair.
Landlords should retain evidence of the inspection, remedial work and certification. Our London landlord EICR service supports inspection, tenant access, remedial quotations and completion records.
Ask which EICR observations require replacement, whether repair is technically possible, what type of consumer unit is proposed, whether RCBO and surge protection are included and whether earthing and bonding checks form part of the scope.
You should also confirm whether full circuit testing, fault finding, certification, notification, parking, congestion charges and making good are included. The quotation should explain what happens if hidden wiring faults are found after the power is isolated.
Send us the report for review or arrange a professional electrical inspection. We provide EICR testing, consumer unit assessments and remedial electrical work for landlords, homeowners, managing agents and commercial property owners across London.
Find answers to common questions about EICR certificates and electrical safety inspections in London. Visit our FAQ page on EICRcertificates.com for more information.
