Electrical Certificates UK 2026 — Minor Works vs EIC vs EICR Explained

The Three Certificates — and the One Rule That Decides Between Them

Almost every electrical job you do will be documented with one of three things: a Minor Electrical Installation Works Certificate, an Electrical Installation Certificate, or an Electrical Installation Condition Report. The single most useful question for telling the first two apart is: does the work involve a new circuit? If it doesn't, it's minor works. If it does — or if it's a whole new installation or a consumer unit change — it's an EIC. The third document, the EICR, isn't for new work at all; it reports on the condition of an installation that already exists.

1. Minor Electrical Installation Works Certificate (MEIWC)

The Minor Works Certificate — MEIWC, often just called the "minor works cert" — covers additions and alterations to an existing circuit that do not involve running a new circuit. It is the right document for the everyday small jobs that make up a large share of a domestic electrician's workload.

Typical jobs that warrant a minor works certificate include:

• Adding a socket or a fused spur to an existing ring or radial circuit
• Adding or moving a light fitting or switch on an existing lighting circuit
• Replacing a damaged accessory like-for-like (a socket front, a switch, a ceiling rose)
• Extending an existing circuit to a new outlet, provided no new circuit is created at the consumer unit

The certificate confirms that the alteration is safe, that it complies with BS 7671, and that it has not impaired the safety of the existing installation. Crucially, the testing required only relates to the part of the circuit affected by the work — not the whole installation. You record the circuit details, confirm continuity and polarity, measure earth fault loop impedance (Zs) at the new point, test insulation resistance and verify that the RCD protecting the circuit operates correctly. One signature, from the person who carried out the work, completes it.

A minor works certificate is still a legal record. If you add a socket and hand the customer nothing, you have no documented proof the work was tested and safe — and if anything ever goes wrong, that gap sits with you.

2. Electrical Installation Certificate (EIC)

The Electrical Installation Certificate is required whenever the work involves a new circuit, a brand-new installation, a consumer unit (fuse board) change, or a full or partial rewire. If you're running a new circuit from the consumer unit — a dedicated cooker circuit, a new socket circuit for an extension, a circuit for an EV charger, a shower circuit — the job needs an EIC, not minor works.

The EIC is more extensive because it documents the design, construction and inspection and testing of the new work in full. It allows for up to three signatures — design, construction, and inspection and testing — which can be the same person on a small job or three different people on a larger contract. The schedule of test results that accompanies it covers every new or modified circuit, with the full set of dead and live tests recorded.

A consumer unit change is the example that catches people out. Swapping a fuse board is not "like-for-like accessory replacement" — it requires an EIC, full testing of every circuit reconnected to the new board, and (as covered below) it is notifiable under Part P in England and Wales.

3. Electrical Installation Condition Report (EICR)

The EICR is the odd one out: it is not a certificate for new work. It is a periodic inspection report on the condition of an installation that already exists. You produce an EICR when you are inspecting and testing an existing installation to report on its safety — you are not certifying work you carried out.

EICRs are most commonly required for:

• Rented property: landlords in England must have a satisfactory EICR at least every 5 years (and at change of tenancy where the existing report has expired)
• House sales and purchases: buyers' solicitors and surveyors often ask for one
• Periodic safety checks of older installations, or where a consumer unit or installation is of unknown age and condition

An EICR classifies any issues found using observation codes: C1 (danger present, risk of injury, immediate action required), C2 (potentially dangerous, urgent remedial action required), C3 (improvement recommended, not a fail on its own) and FI (further investigation required). A report is only "satisfactory" if there are no C1, C2 or FI codes. Remedial work flagged by an EICR is then carried out and certified separately — with minor works or an EIC depending on whether new circuits are involved.

Part P and Notifiable Work

Certificates and notification are two different things, and conflating them is where a lot of confusion comes from. The certificate proves the work was tested and complies with BS 7671. Notification is a separate Building Regulations requirement that applies to certain electrical work in dwellings in England and Wales under Part P.

Under Part P, notifiable electrical work in a home includes:

• Installation of a new circuit
• A consumer unit replacement or change
• Certain work in special locations — most commonly a bathroom or shower room, and rooms containing a swimming pool or sauna

Notifiable work has to be signed off by building control. There are two routes. The first is to use a registered competent person: an electrician who is a member of a Competent Person Scheme (such as those run by NICEIC, NAPIT, ELECSA or STROMA) can self-certify the work as compliant and notify the local authority through their scheme, which then issues the customer a Building Regulations compliance certificate. The second route, for anyone not registered, is to notify building control directly before the work starts and pay for their inspection — slower and usually more expensive.

Non-notifiable work — like adding a socket or a spur to an existing circuit outside a special location — does not need to go to building control. But it still needs a minor works certificate. Non-notifiable does not mean "no paperwork": the BS 7671 obligation to test and certify the work stands regardless of whether Part P notification applies.

Quick Reference: Which Certificate, and Is It Notifiable?

Use this as a starting point, not a substitute for judgement on the day — special-location rules and the exact scope of the work always need checking against BS 7671 and the current Building Regulations guidance.

Why Issuing the Right Certificate Matters

It is tempting, on a busy week, to treat certificates as admin. They are not — they are the legal and commercial backbone of electrical work, and they protect everyone involved.

• Legal compliance: BS 7671 requires that new electrical work, additions and alterations are inspected, tested and certified. Notifiable work additionally requires Building Regulations sign-off. Skipping either is a compliance failure.
• Customer protection: the certificate is the customer's evidence that the work was done safely and to standard. It tells them what was installed, what was tested and that it passed.
• Insurance: home and buildings insurers can refuse a claim where electrical work was carried out without the correct certification — particularly a consumer unit change or new circuit that should have been notified.
• Selling or renting: conveyancing solicitors routinely ask for electrical certificates and Building Regulations compliance certificates. Missing paperwork can stall or sink a property sale, and landlords cannot legally let without a satisfactory EICR.
• Protecting the electrician: a properly completed and retained certificate is your record that the work was safe when you left it. If a dispute arises years later, it is the difference between a defensible position and an exposed one.

For customers, the practical takeaway is simple: always ask what certificate you will be given before the work starts. For a socket or spur, expect a Minor Works Certificate. For a new circuit, consumer unit change or rewire, expect an EIC and — if the work is notifiable — a Building Regulations compliance certificate that follows from the electrician's Competent Person Scheme. If an electrician can't tell you which one applies, that is a warning sign.

A Note on the Rest of the UK

Part P is a part of the Building Regulations for England and Wales specifically. Scotland operates a separate building standards system under the Building (Scotland) Regulations, and Northern Ireland has its own building regulations too. The BS 7671 testing and certification requirements — minor works, EIC and EICR — apply across the UK because they come from the wiring regulations rather than from Part P. But the notification mechanism differs by nation, so if you work across the border, check the local building standards regime rather than assuming Part P applies everywhere.

Turning Certified Work into Repeat Business

Compliance is only half the job — the other half is making sure the well-certified, professional work you do actually turns into a steady pipeline of enquiries. A surprising number of electricians have no idea which of their marketing channels — Google, a Business Profile, word of mouth, a van wrap, a directory listing — actually produces paid jobs versus which just produces time-wasting calls.

Tracking where each booked job came from is one of the simplest ways to grow without spending more. That's the kind of thing Trade2Base is built to help trades do — tying enquiries back to the marketing that produced them so you put money behind what works.