EICR vs Electrical Installation Certificate vs Minor Works Certificate: Which One Do You Need?

EICR, Electrical Installation Certificate and Minor Works Certificate: the quick answer

Complete electrical certificate comparison table

What is an EICR?

An Electrical Installation Condition Report is produced after an existing fixed electrical installation has been inspected and tested. It may also be described as fixed-wire testing, periodic inspection, an electrical safety report or a landlord electrical certificate.

The purpose of an EICR is to assess whether the electrical installation is safe for continued use and to identify defects, deterioration, damage or potentially dangerous conditions.

Depending on the property and the agreed extent of the inspection, an EICR may examine:

• The consumer unit or distribution boards.
• Main switches, circuit breakers, fuses, RCDs and RCBOs.
• The electrical supply and earthing arrangement.
• Main protective bonding.
• Socket circuits and lighting circuits.
• Fixed electrical equipment included within the agreed scope.
• Circuit identification and distribution-board schedules.
• Signs of overheating, damage or deterioration.
• Insulation resistance.
• Protective conductor continuity.
• Polarity.
• Earth fault loop impedance.
• RCD operating times and functional operation.
• The suitability of protective devices for the circuits they serve.

An EICR is more than a visual check to confirm that lights and sockets appear to work. An installation can remain operational while containing electrical defects that require urgent action.

For property owners who want to understand each section of the report, our detailed guide explains how to read and understand an EICR report, including observations, limitations and schedules of test results.

Understanding EICR observation codes

Where the inspector identifies a defect or safety concern, the observation may be assigned an EICR classification code.

An EICR containing one or more C1, C2 or FI observations will generally be assessed as unsatisfactory.

Examples of defects that may result in observations include:

• Exposed live parts.
• Damaged sockets, switches or accessories.
• Missing or inadequate protective bonding.
• Incorrect polarity.
• Poor circuit continuity.
• Defective insulation resistance.
• Borrowed neutrals.
• Signs of overheating.
• Unsuitable protective devices.
• Inadequate fault protection.
• Dangerous alterations or additions.
• Defects requiring further investigation.

Where an inspection is unsatisfactory, our team can assess the observations and provide a quotation for the necessary remedial work following a failed EICR.

What an EICR does not prove

An EICR is a condition report. It is not a certificate for newly completed installation work and it does not provide an unlimited guarantee covering every component in the property.

An EICR does not automatically prove:

• Who originally installed each circuit.
• That every concealed cable was visually inspected.
• That all floor voids, walls, ceilings or enclosed spaces were opened.
• That every circuit was tested without limitation.
• That recent electrical work was correctly notified under the Building Regulations.
• That portable appliances were tested.
• That the installation will remain fault-free indefinitely.
• That every recommendation must be upgraded immediately.
• That the property is identical to a newly constructed electrical installation.

What is an Electrical Installation Certificate?

An Electrical Installation Certificate, commonly abbreviated to EIC, is issued for new electrical installation work or substantial additions and alterations.

The certificate records responsibility for:

• Design.
• Construction.
• Inspection.
• Testing.

An Electrical Installation Certificate may be required for work such as:

• A completely new electrical installation.
• A full property rewire.
• A partial rewire involving one or more new circuits.
• A replacement consumer unit.
• A new cooker circuit.
• A new electric shower circuit.
• A new circuit for an outbuilding.
• A new EV charging circuit.
• New circuits installed during an extension or loft conversion.
• New distribution equipment.
• Significant commercial electrical installation work.

The most important part of the EIC is the description and extent of the installation work covered.

What information should an Electrical Installation Certificate contain?

A properly completed certificate will normally identify:

• The property or installation address.
• The client.
• The extent and description of the installation work.
• The designer, installer and inspector where applicable.
• The characteristics of the electrical supply.
• The earthing arrangement.
• Protective measures.
• Any departures from the applicable wiring requirements.
• Circuit details.
• Inspection schedules.
• Test results.
• The recommended interval before the next inspection.
• The declarations and signatures of the responsible persons.

The certificate should be retained with the property’s electrical records. It may become important during a sale, tenancy, insurance claim, future alteration or subsequent EICR.

What is a Minor Electrical Installation Works Certificate?

A Minor Electrical Installation Works Certificate is commonly called a Minor Works Certificate or MEIWC.

It is intended for a limited addition or alteration to an existing circuit where a new circuit has not been created.

Common examples include:

• Adding a socket to an existing suitable circuit.
• Adding a lighting point to an existing circuit.
• Installing a fused connection unit.
• Relocating a switch or socket.
• Making a limited alteration to existing wiring.
• Completing a small repair for which formal electrical certification is appropriate.

The certificate should describe the work undertaken and include the relevant inspection and test information for the alteration and affected circuit.

What a Minor Works Certificate cannot be used for

A Minor Works Certificate is not suitable for:

• A completely new circuit.
• A consumer unit replacement.
• A full rewire.
• A substantial electrical installation.
• A full periodic inspection of a property.
• A landlord’s whole-property EICR.
• A complete commercial fixed-wire inspection.

EICR vs Electrical Installation Certificate: what is the real difference?

The central distinction is between assessing an existing installation and certifying newly completed work.

Does an Electrical Installation Certificate replace an EICR?

In most situations, it does not.

An Electrical Installation Certificate certifies the installation work described on the document. An EICR assesses the present condition of an existing installation within a defined scope.

An EIC for one of the following would not normally be treated as a complete replacement for a periodic whole-property EICR:

• One new circuit.
• A consumer unit replacement.
• A kitchen alteration.
• An electric shower circuit.
• An EV charger circuit.
• An extension.
• A bathroom circuit.
• A partial rewire.
• A commercial fit-out limited to one area.

A property can legitimately have several valid documents at the same time:

• An EIC for a consumer unit replaced in 2024.
• A Minor Works Certificate for sockets added in 2025.
• An EICR completed in 2026.
• Building Regulations documentation for notifiable work.
• Remedial confirmation for defects corrected after the EICR.

These documents create an electrical history for the property. One does not automatically cancel or replace the others.

Does an EICR replace an Electrical Installation Certificate?

Usually not.

Suppose a new shower circuit was installed but the property owner never received the required Electrical Installation Certificate. A later EICR may assess the installation as it exists at the time of inspection, but it does not automatically recreate the original installer’s certification for:

• Design.
• Construction.
• Initial verification.
• The exact scope of the original project.
• Building Regulations notification.

Where an installation certificate is missing, the property owner may need to:

• Contact the original electrical contractor and request a duplicate.
• Check whether the work was registered through a competent person scheme.
• Review local authority Building Control records.
• Arrange an electrical inspection.
• Commission further investigation where required.
• Discuss the documentation with a solicitor, insurer or Building Control where relevant.
• Retain all available invoices, photographs and technical records.

Is a Part P certificate the same as an Electrical Installation Certificate?

No. The documents may relate to the same project, but they perform different functions.

Electrical Installation Certificate

This is the technical electrical certificate covering the design, construction, inspection and testing of the electrical installation work described.

Building Regulations Compliance Certificate

This confirms that qualifying domestic electrical work was notified through the appropriate Building Regulations route.

For relevant domestic work, the property owner may therefore receive:

• An Electrical Installation Certificate.
• A Building Regulations Compliance Certificate.
• Schedules of inspections and test results.
• Manufacturer information.
• An invoice and detailed scope of work.

Neither document automatically replaces a periodic EICR when a condition assessment of the existing installation is required.

What certificate should you receive after a consumer unit replacement?

A consumer unit replacement is substantial electrical work. A Minor Works Certificate is not the correct certificate for this project.

You should normally expect documentation including:

• An Electrical Installation Certificate.
• A schedule of inspections.
• A schedule of circuit details.
• Relevant electrical test results.
• Building Regulations compliance documentation where applicable.
• Details of any limitations or departures.
• Records for any additional repairs completed during the work.

Before existing circuits are connected to a new consumer unit, the electrician must establish whether they are suitable for continued connection.

Testing can reveal:

• Borrowed neutrals.
• Low insulation resistance.
• Incorrect polarity.
• Missing circuit protective conductors.
• Inadequate earthing.
• Missing protective bonding.
• Damaged wiring.
• Poor circuit continuity.
• Incorrect circuit identification.
• Defects that prevent safe energisation.
• Circuits that are unsuitable for connection to new protective devices.

Our practical guide to consumer unit replacement after a failed EICR explains why a new board may be necessary in some cases and why repairing one visible defect may not resolve wider protection problems.

Do you need an EICR after electrical work?

The answer depends on the extent of the work, the age and condition of the remaining installation and why the documentation is required.

A separate EICR may not be immediately necessary where:

• The whole property has been properly rewired.
• The complete new installation was inspected and tested.
• A valid Electrical Installation Certificate was issued.
• Complete circuit schedules and test results were provided.
• Building Regulations requirements were satisfied.
• The recommended future inspection date is clearly recorded.

A separate EICR may still be necessary or advisable where:

• Only part of the property was rewired.
• Only one new circuit was installed.
• The consumer unit was replaced but older wiring remains.
• The landlord’s existing EICR has expired.
• The property is being purchased.
• Previous electrical alterations are poorly documented.
• The property has suffered water damage.
• The installation has been affected by fire or major building work.
• There are signs of overheating, deterioration or damage.
• The use of the property has changed.
• A commercial periodic inspection is due.
• An insurer, lender, solicitor or surveyor requests a condition report.

Electrical certificate decision sheet

What documentation is required after EICR remedial work?

An unsatisfactory EICR does not become satisfactory merely because an invoice has been issued or paid. The property owner should retain clear evidence showing which observations were addressed and what work was completed.

Depending on the repairs, the final evidence pack may include:

• The original EICR.
• A detailed remedial quotation.
• Minor Works Certificates.
• Electrical Installation Certificates.
• Schedules of test results.
• Photographs.
• Detailed invoices or job sheets.
• Written confirmation that the required remedial work was completed.
• Building Regulations documentation where applicable.
• Updated circuit schedules.

A completely new EICR is not automatically required after every remedial repair. In many cases, the original EICR, the relevant installation certificates and written confirmation together form the evidence that the identified defects were corrected.

A fresh EICR may be appropriate where:

• The original inspection had substantial limitations.
• Extensive work materially changed the installation.
• Further investigation revealed wider defects.
• There is uncertainty about whether all observations were resolved.
• The client specifically requires an updated condition report.
• A responsible party requires a new EICR rather than remedial confirmation.

Case study 1: landlord with a new consumer unit but an expired EICR

Case study 2: homeowner completing a kitchen renovation

Case study 3: property buyer receives several electrical certificates

Case study 4: commercial office fit-out and overdue fixed-wire testing

Which electrical certificate do London landlords need?

For periodic electrical safety in rented homes, the principal document is generally the EICR.

Landlords should not rely solely on:

• An electrician’s invoice.
• A certificate for a past consumer unit replacement.
• A Minor Works Certificate.
• A PAT testing record.
• A verbal assurance that the electrics are safe.
• An expired EICR.
• A certificate covering only one circuit.
• Documentation belonging to another flat or property.
• A Building Regulations certificate alone.
• A report that does not identify the correct unit.

Landlord electrical document checklist

Before a new tenancy or the expiry of an existing report, check that you have:

• A complete and readable EICR.
• The correct property address and unit number.
• The inspection date.
• The recommended next inspection date.
• The overall satisfactory or unsatisfactory assessment.
• Schedules of inspection.
• Circuit details and test results.
• Clearly recorded limitations.
• Details of all C1, C2, C3 and FI observations.
• Evidence that required remedial work was completed.
• Relevant EICs and Minor Works Certificates.
• Building Regulations documentation where applicable.
• Evidence that the required report was supplied to the relevant parties.

Landlords can review our dedicated London landlord EICR service for inspection information, pricing guidance and online booking.

Which electrical certificate do homeowners need?

The correct document depends on the homeowner’s objective.

An EICR may be appropriate when:

• The electrical installation has not been inspected for many years.
• The property is being purchased or sold.
• There are signs of deterioration.
• Historic DIY alterations are suspected.
• The installation has suffered flooding or water damage.
• The installation has been affected by fire.
• Major renovation work is planned.
• A surveyor recommends an electrical inspection.
• An insurer or lender requests evidence.
• The homeowner wants to understand whether rewiring may be required.

An Electrical Installation Certificate may be required when:

• A new circuit is installed.
• The property is rewired.
• The consumer unit is replaced.
• A substantial electrical alteration is completed.
• New electrical distribution equipment is installed.

A Minor Works Certificate may be appropriate when:

• A socket is added to an existing circuit.
• A lighting point is added.
• A switch or socket is relocated.
• An existing circuit is altered.
• A limited electrical repair is completed.

The certificate should match the actual work undertaken rather than simply using the document name most familiar to the customer.

Which electrical certificates do commercial properties need?

Commercial properties often accumulate several types of electrical documentation because installation work, maintenance and testing are completed in phases.

A commercial compliance file may include:

• Electrical Installation Condition Reports.
• Electrical Installation Certificates.
• Minor Works Certificates.
• Emergency lighting certificates.
• Fire alarm certificates.
• PAT testing records.
• Distribution-board schedules.
• Remedial work records.
• Thermal imaging reports.
• Planned maintenance records.
• Tenant fit-out documentation.
• Landlord electrical records.

The commercial EICR should have a clearly defined extent. For example:

A precise scope helps landlords, tenants, facilities managers and future contractors understand exactly what was inspected and what remained outside the report.

How to check whether an electrical certificate is complete and useful

A certificate may look professional while still being incomplete, incorrectly scoped or unrelated to the installation in question.

Common electrical certificate misconceptions

“My consumer unit is new, so the whole property is fully certified.”

A new consumer unit does not prove that every existing circuit, cable and accessory is free from defects. The EIC covers the installation work described, while an EICR assesses the condition of the wider existing installation.

“The electrician gave me an invoice, so I have the correct certificate.”

An invoice proves that a commercial transaction took place. It is not automatically the required technical electrical certificate.

“My Minor Works Certificate covers all the electrics.”

A Minor Works Certificate normally covers only the limited addition or alteration described.

“A satisfactory EICR means the installation is identical to a new installation.”

An older installation does not automatically require complete replacement merely because it does not include every feature expected in a new installation. The inspector considers the observed condition, safety and suitability for continued use.

“Every C3 observation means the EICR has failed.”

A C3 means improvement recommended. A C3 alone does not normally make the report unsatisfactory.

“PAT testing and an EICR are the same.”

They are different inspections:

• PAT testing concerns portable electrical appliances and equipment.
• An EICR concerns the fixed electrical installation.

Our specialist guide explains the difference between EICR and PAT testing for London rental properties.

Recommended electrical certification pathway

Existing property requiring a condition assessment

1. Book an EICR.
2. Agree the inspection extent and any necessary limitations.
3. Complete inspection and testing.
4. Review the report observations.
5. Obtain a remedial quotation where required.
6. Complete the necessary C1, C2 and FI actions.
7. Obtain the appropriate electrical certificates and test results.
8. Retain written remedial confirmation.
9. Store all electrical documents together.
10. Record the recommended next inspection date.

New electrical installation work

1. Define the work scope.
2. Complete the electrical design.
3. Install the work.
4. Inspect and test the installation.
5. Issue the Electrical Installation Certificate.
6. Complete Building Regulations notification where applicable.
7. Retain schedules and test results.
8. Record the recommended future inspection date.

Minor electrical alteration

1. Assess the suitability of the existing circuit.
2. Complete the limited addition or alteration.
3. Carry out the required inspection and testing.
4. Issue the appropriate Minor Works Certificate.
5. Retain the document with the property’s electrical records.

When might you need more than one certificate?

Different certificates may be required when several types of work are completed during the same project.

For example, an EICR identifies:

• A damaged socket.
• Inadequate bathroom protection.
• A defective circuit.
• An unsuitable consumer unit requiring replacement as part of the agreed corrective solution.

The final evidence pack could include:

• The original EICR.
• A Minor Works Certificate for limited circuit alterations.
• An Electrical Installation Certificate for the consumer unit replacement.
• Building Regulations documentation.
• Electrical test schedules.
• A detailed invoice or job record.
• Written confirmation that the EICR observations were resolved.

This is normal. Electrical safety and installation records are not always represented by one universal certificate.

Final answer: which electrical certificate do you need?

The most common mistake is holding one electrical document and assuming that it proves everything about the property.

Good electrical record-keeping is cumulative. Each document should clearly explain:

• What was inspected.
• What was installed.
• What was tested.
• Which circuits were included.
• What limitations applied.
• Which defects were identified.
• What remedial work was completed.
• When the next inspection is recommended.