A new consumer unit has been fitted, or a landlord has asked for paperwork before a tenancy starts. The question that follows is often the same: EICR vs electrical installation certificate – which one do you actually need? They are both essential electrical documents, but they serve very different purposes. Ordering the wrong one can leave a property without the evidence it needs for safety, compliance or future fault finding.
For homeowners, landlords and property managers, the practical distinction is simple. An Electrical Installation Certificate records that specified new electrical work was installed and tested correctly. An Electrical Installation Condition Report, usually called an EICR, checks the safety and condition of an existing installation.
EICR vs electrical installation certificate: the core difference
An Electrical Installation Certificate (EIC) is issued when electrical installation work has been carried out. It is evidence of what was installed, how it was tested and whether it met the relevant requirements at the time the work was completed.
An EICR is an inspection report for an installation that is already in use. A qualified electrician examines the system for deterioration, damage, overloading, poor workmanship, missing protection and other hazards. The report identifies whether the installation is satisfactory or unsatisfactory, and records any action needed.
Think of an EIC as the handover record for new work. An EICR is the health check carried out later.
That distinction matters because an EIC cannot prove that an older installation remains safe years after the work was completed. Equally, an EICR does not act as a completion certificate for a new circuit, consumer unit or full rewire.
When you need an Electrical Installation Certificate
An Electrical Installation Certificate is normally required for new electrical installation work, particularly where circuits are added, altered or replaced. Common examples include a full or partial rewire, a new consumer unit, new circuits for an electric shower or cooker, substantial lighting work, and an EV charger installation.
The certificate should describe the work, record inspection and testing results, and identify the person responsible for design, installation and testing where applicable. It gives the owner a clear record of the installation from day one.
For notifiable work, additional building regulations paperwork may also be required. This is separate from the EIC itself, although the documents are closely related. A competent electrician should explain what documentation applies before the job begins, not after the work has been completed.
Small, limited additions or alterations may sometimes be recorded on a Minor Electrical Installation Works Certificate instead of a full EIC. For example, this may apply where an electrician adds a spur or makes a straightforward alteration to an existing circuit. The right certificate depends on the scope of the work, not simply its cost.
When an EICR is the right document
An EICR is for an existing property or commercial premises where the electrical installation needs to be assessed. It is not just a visual check. The engineer will inspect accessible parts of the installation and carry out appropriate testing to establish whether protective devices, earthing, wiring and circuits are performing safely.
For landlords in England, a valid EICR is a legal requirement for most private rented homes. The installation must be inspected and tested at least every five years, or sooner if the previous report recommends it. A copy must be given to new tenants before they move in, to existing tenants within 28 days of the inspection, and to the local authority within seven days if requested.
Homeowners are not generally subject to the same five-year legal requirement. However, an EICR is a sensible step when buying a property, after major water damage or building work, if fuses trip repeatedly, or where the wiring is older and its history is unclear. It can also be useful before putting a home on the rental market.
Small businesses, shops and offices may need inspections more frequently than domestic properties because of heavier use, public access, environmental conditions or insurer requirements. The appropriate interval should be based on the type of premises and professional advice, rather than assuming one timescale fits every building.
What an EICR can uncover
Electrical faults are not always obvious. Lights may work, appliances may turn on and the consumer unit may appear normal, while the installation still has defects that need attention. An EICR is designed to identify concerns before they become shocks, overheating incidents or fire risks.
The report uses observation codes to show the seriousness of defects. C1 means danger is present and urgent action is needed. C2 indicates a potentially dangerous condition requiring remedial work. FI means further investigation is required without delay. Any C1, C2 or FI observation will usually result in an unsatisfactory report.
A C3 observation is a recommendation for improvement. It does not by itself make an EICR unsatisfactory, but it should not be ignored without considering the reason for the recommendation. Older consumer units, for example, may not have the same level of protection expected in a modern installation, even if no immediate danger has been found.
Can one document replace the other?
No. This is where confusion can create problems for landlords and property owners.
If you have just had a new circuit installed, the installer should issue the relevant installation certificate. That document confirms the new work was tested at completion. It does not remove the need for a periodic EICR at the required interval.
If an EICR identifies defective wiring, damaged accessories or inadequate protection, remedial work may be needed. Once that work is complete, the electrician should provide appropriate certification for the work carried out. Depending on the scope, this may be an EIC, a Minor Works Certificate or a written confirmation attached to the EICR. A remedial certificate does not automatically turn an old unsatisfactory EICR into a satisfactory report unless the defects have been properly addressed and the outcome confirmed.
Keep all documents together. An EIC for a consumer unit upgrade, certificates for later additions and the latest EICR create a much clearer electrical history for future engineers, buyers, insurers and tenants.
What to expect during an EICR appointment
A proper inspection takes time. The duration depends on the size of the property, number of circuits, access to equipment and condition of the installation. A studio flat may be straightforward; a large house, converted property or busy commercial unit will need more time and planning.
The electrician may need to isolate parts of the supply to complete testing safely. That can temporarily interrupt lighting, sockets, broadband equipment and appliances, so it is worth arranging the appointment around work calls, refrigeration needs or trading hours where possible. In a tenanted property, access to the consumer unit, meter area and rooms with fixed electrical equipment should be arranged in advance.
A reliable engineer should explain any limitations. For instance, fixed furniture, inaccessible wiring or locked areas may prevent a full assessment of certain parts of the installation. Limitations must be recorded clearly, because they affect what the report can confirm.
Choosing the right electrical engineer
The paperwork is only as dependable as the inspection and testing behind it. Avoid treating an EICR as a quick box-ticking exercise. A very low quote can sometimes mean limited testing, vague observations or pressure to accept unnecessary remedial work.
Choose a competent, properly qualified electrician who can explain the findings in plain English, provide transparent pricing for any repairs and issue the correct certification after work is complete. For London landlords and homeowners, it is particularly useful to work with an engineering team that can inspect, diagnose and carry out justified remedial work without passing the problem between multiple contractors.
FaultFree Engineering Group provides electrical inspections, landlord certificates, consumer unit work, fault finding and repairs with a practical focus on safe, clearly documented outcomes.
When you are deciding between an EICR and an Electrical Installation Certificate, start with one question: are you checking the condition of existing electrics, or documenting new work? Get that right, keep the records safe and act promptly on genuine defects. It is the simplest way to protect the people using the property and avoid preventable disruption later.