Minor Electrical Works Certificate (MEIWC) UK: When to Use It and What It Must Include
Written by Tom Ellis · Senior Trades Editor
Last updated: October 2026
Quick Answer
A Minor Electrical Installation Works Certificate (MEIWC) is issued by a qualified electrician for small additions or alterations to an existing electrical circuit that do not include the provision of a new circuit. Common examples include adding a socket to an existing ring final circuit, replacing a light fitting, or installing a fused spur. It is not required for simple like-for-like replacements.
EIC vs MEIWC vs EICR: which certificate for which job?
There are three electrical certificates that come up repeatedly in domestic and light commercial work. Understanding which one applies to a given job is one of the most important things a practising electrician needs to get right. Issuing the wrong certificate is a compliance failure and a liability risk.
| Certificate | Full name | When used |
|---|---|---|
| EIC | Electrical Installation Certificate | New circuits, new consumer unit, new installation |
| MEIWC | Minor Electrical Installation Works Certificate | Additions or alterations to existing circuits (no new circuit) |
| EICR | Electrical Installation Condition Report | Periodic inspection of an existing installation |
The critical rule that trips up newer electricians is this: if you are adding a new circuit — even a short one feeding a single outlet — you need an EIC, not a MEIWC. The MEIWC is only valid for work that connects to an existing circuit. The moment you introduce a new protective device in the consumer unit and run cable from it, you are installing a new circuit and the job requires an EIC.
An EICR is an entirely different document. It is not a certificate of new work; it is a periodic inspection report on an existing installation. You would never issue an EICR at the end of an installation job. EICRs are what landlords need every five years, what buyers commission before purchase, and what comes due when the previous inspection period expires.
When to issue a Minor Works Certificate: a practical checklist
The following lists cover the most common domestic and light commercial scenarios. Use them as a quick reference before deciding which certificate to issue.
Issue a MEIWC for:
- Adding a socket outlet to an existing ring final circuit — the most common MEIWC job in domestic work.
- Installing a fused connection unit (FCU/spur) from an existing circuit, for example to feed a fixed appliance such as a boiler, extractor fan, or under-floor heating mat.
- Adding a light point to an existing lighting circuit, such as an additional ceiling rose, pendant, or downlight on an existing breaker.
- Installing an outdoor socket on an existing circuit where the existing RCD protection extends to cover the new outlet.
- Replacing a ceiling rose or light fitting where it is appropriate to carry out and record insulation resistance and continuity tests on completion.
- Installing a shaver point on an existing bathroom lighting circuit using a shaver supply unit compliant with BS EN 61558-2-5.
Do NOT use a MEIWC for:
- Installing a new circuit — even a short radial circuit feeding a single socket or appliance. New circuit means new breaker, which means EIC.
- Replacing a consumer unit — this is always a new installation requiring an EIC, even if you are replacing like-for-like.
- Any work in a bathroom where the circuit is new — bathroom additions to new circuits require an EIC. An addition to a well-established existing circuit in a bathroom may use a MEIWC but note the Part P notifiability point below.
- Any work requiring a new protective device — if the job requires adding or changing a breaker, RCD, or RCBO in the consumer unit, it goes beyond minor works.
What a Minor Works Certificate must include
The MEIWC form is defined by BS 7671 Appendix 6. The standard form is reproduced by all the major competent person schemes (NICEIC, NAPIT, ELECSA) and printed pads are available from electrical wholesalers. Every completed MEIWC must contain the following fields to be valid.
| Required field | Notes |
|---|---|
| Description of the work | Be specific — "added 13A socket to ring final circuit" rather than "electrical work" |
| Location of the work | Room, floor, and full property address |
| Date of completion | The date the work and testing were finished |
| Details of departures from BS 7671 | Record any agreed departures; leave blank or mark N/A if none |
| Continuity test results | Protective conductor continuity (R1+R2 or R2), as applicable |
| Insulation resistance | Line-to-earth and neutral-to-earth readings in MΩ (minimum 1 MΩ per BS 7671) |
| Polarity | Confirm correct polarity at all new accessories |
| Earth fault loop impedance (Zs) | Measured at the new point(s); must not exceed the maximum for the protective device |
| RCD tests (as applicable) | Operating time at I∆n and 5×I∆n; required where RCD protection applies to the circuit |
| Declaration of compliance | Statement that the work complies with BS 7671 (current edition) |
| Electrician's details | Full name, signature, and qualification/registration reference (e.g. AM2 assessment reference, NVQ level, or competent person scheme number) |
A MEIWC with missing test results or an absent qualification reference is not technically valid. If you are asked to sign off work without having carried out the relevant tests yourself, decline. Signing a certificate for work you did not test exposes you to professional and legal liability.
Does a Minor Works Certificate need to go to Building Control?
This is an area that causes genuine confusion, and the short answer is: it depends on where in the property the work is carried out and whether you are working through a registered competent person scheme.
Work outside kitchens and bathrooms
Minor works that are additions to existing circuits in most rooms (living rooms, bedrooms, hallways, garages) are typically not notifiable under Part P of the Building Regulations. A MEIWC is the correct certification, and you do not need to notify Building Control or self-certify through a competent person scheme for these jobs.
Work in kitchens and bathrooms
Work in kitchens (including within 600 mm of a sink) and bathrooms is notifiable under Part P even when it is only an addition to an existing circuit. In these locations you need either Building Control notification or self-certification through a competent person scheme. For notifiable bathroom and kitchen work, the correct certificate is an EIC, not a MEIWC, because the notifiable trigger is about location, not circuit type.
Registered competent person schemes
If you are registered with NICEIC, NAPIT, ELECSA, or another approved scheme, self-certification covers the notification requirement on your behalf. Your scheme notifies the local authority automatically. Non-registered electricians doing notifiable work must apply to Building Control directly before starting the work.
For a full breakdown of what is and is not notifiable, see our Part P Building Regulations guide.
How long to keep a Minor Works Certificate
The original certificate should be given to the client on completion of the job. They should keep it with the property's electrical records, alongside any previous EICs, EICRs, and the consumer unit schedule.
- →Homeowners should keep the certificate until the property is sold or until a subsequent EICR supersedes it. When you sell, the certificate forms part of the electrical history that a buyer's solicitor may request.
- →Landlords should keep all electrical certificates for the property and make them available to tenants on request. Keep each MEIWC at least until the next EICR confirms the installation remains satisfactory.
- →Electricians should keep a copy of every MEIWC they issue for their own records for at least six years. This aligns with the standard limitation period for civil claims in England and Wales and protects you if a client later disputes the quality or safety of the work.
There is no specific statutory retention period that applies to the MEIWC itself, but the practical standard across the industry is six years for electricians and indefinitely (or until superseded) for property owners and landlords.
Minor Works Certificate cost: what electricians typically charge
There is no separate "certificate fee" for a MEIWC. The certificate is documentation of work you have already carried out and tested — it comes with the job, and the cost is built into the price of the work itself. If a client asks why they are being charged for the certificate, the straightforward answer is that they are not: the testing and the paperwork are part of what a professional electrician does on every job, and they are reflected in the overall price.
Adding a socket to an existing ring final circuit
This is the most common MEIWC job. Expect to pay £80–150 for labour plus materials (a double socket and back box typically cost £5–15). The price reflects one to two hours of work plus the testing and certificate. Prices in London and the South East run higher.
Standalone certificate for existing work
Some electricians are asked to inspect and certify work carried out by others — for example, if a client did some DIY wiring or a previous electrician failed to issue a certificate. In this case the electrician needs to inspect and test the installation before they can certify it. A standalone inspection and test of a single circuit addition typically costs £75–150. The electrician cannot simply sign an existing piece of work without testing it themselves.
Installing a fused spur or adding a light point
These jobs typically take one to two hours including testing. Most electricians charge £80–130 for a fused spur installation and £80–150 to add a light point to an existing circuit, depending on how much cable needs to be run and whether the work involves working in a ceiling void or behind plasterboard.
For a broader picture of electrician pricing by job type and region, see our electrician hourly rate guide for 2026.
Related electrical guides
If you found this guide useful, the following pages cover related topics in more depth.
- →EICR codes explained: C1, C2, C3 and FI — what each code means, how urgently it needs to be addressed, and when an EICR is classed as satisfactory or unsatisfactory.
- →Part P Building Regulations UK — which electrical work is notifiable, what self-certification means, and how competent person schemes work.
- →Electrician hourly rate UK 2026 — day rates, call-out fees, and regional pricing benchmarks for domestic and commercial electrical work.
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