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Most domestic electrical work is not notifiable at all. Here's what Part P actually catches, why Wales is wider than England, and what turns up at sale.
A consumer unit swap is half a day’s work for a competent electrician. It is also one of the few domestic jobs that is notifiable in its own right. So the half-day carries a paperwork obligation. The customer never asks about it, and the electrician sometimes forgets. Three years later the house goes on the market, the buyer’s solicitor asks for the compliance certificate, and there isn’t one.
At that point the options are all bad. You can apply retrospectively to building control, which costs more than notifying would have and may involve exposing the work. You can buy indemnity insurance, which covers the conveyancing risk without making the installation compliant. Or the sale stalls. None of that lands on the electrician who did the work. That is exactly why the Part P electrical regulations get treated as optional, usually by people who have never seen the far end of the process.
The frustrating part is how narrow the actual obligation is. Most domestic electrical work is not notifiable at all.
Part P sits within the Building Regulations and covers electrical safety in dwellings. It is a legal duty, and it applies to the work rather than to the person. However, the list of jobs requiring notification is much shorter than most people assume, because England cut it back sharply in 2013.
In England the notifiable list now covers three things: installing a new circuit, replacing a consumer unit, and altering or adding to existing circuits in a special location. A special location means a room containing a bath or shower, or a room with a swimming pool or sauna heater. Everything else is non-notifiable in England, although it still has to comply. That covers adding a socket to an existing bedroom circuit, replacing a light fitting, or running a spur in a kitchen.
NOTIFIABLE OR NOT — THE ENGLAND POSITION
| The job | Notifiable? | What it turns on |
|---|---|---|
| New circuit from the board | Yes | Any new circuit, anywhere in the dwelling |
| Consumer unit replacement | Yes | Notifiable on its own, even with no other change |
| New shower circuit in a bathroom | Yes | New circuit and a special location |
| Extra socket on an existing bedroom circuit | No | Addition outside a special location |
| Extra spur in a kitchen | No | Kitchens stopped being special locations in England in 2013 |
| Like-for-like accessory replacement | No | Repair and replacement, not alteration |
This table describes England. Wales did not follow the 2013 reduction, so the notifiable list there is wider. Confirm against the current Approved Document for the country you are working in.
Non-notifiable does not mean unregulated. The installation still has to meet the standard, and the customer is still entitled to a certificate for the work. What changes is whether building control has to be told.
Assume the job is notifiable. There are three lawful ways to deal with it, and the cost gap between them is large.
The first is self-certification through a competent person scheme. An electrician registered with a scheme such as NICEIC or NAPIT notifies the scheme. The scheme then notifies the local authority, and a Building Regulations Compliance Certificate reaches the householder by post. In addition, this is the route that keeps the job to its natural duration.
The second is notifying building control directly before work starts. This is available to anyone, which matters if you are not scheme-registered, but it brings a fee, an inspection and a wait. Consequently a two-day job can acquire a two-week timeline.
The third is retrospective regularisation, which is what happens after the fact. It costs more, it is discretionary, and building control may require finished surfaces to come off so the work can be seen. This is the route nobody chooses and plenty of people end up on.
Here is where competent electricians still come unstuck. An Electrical Installation Certificate issued under BS 7671 records that the work meets the wiring standard. It is not a Building Regulations Compliance Certificate, and it does not satisfy the notification duty.
Similarly, an unregistered electrician can produce a perfectly valid installation certificate for a consumer unit swap. That still leaves the customer without the document their solicitor will ask for. Both papers matter. They answer different questions, and only one of them comes from the building control side.
This is the part that catches firms working across borders. Part P is an England and Wales instrument, but the two countries have not moved in step since 2013. Wales did not adopt the narrower English scope, so work that is non-notifiable in Bristol can be notifiable in Cardiff.
Scotland does not use Part P at all. Electrical work there sits within the Scottish building standards system, using building warrants and a separate certification arrangement. Neither the terminology nor the process transfers. Northern Ireland likewise operates its own building regulations. Therefore treat the country as a variable on the quote rather than a detail, and confirm the current position before pricing work outside your usual patch.
The pattern is familiar from other trades. Gas work runs on a registration duty with a building-standards layer that changes at the border. That is the same structure described in our guide to Gas Safe registration. Electrical work simply splits earlier. One more distinction is worth holding onto, because it catches people on their first commercial job: scheme registration governs notification, not site access. Getting through the gate runs on a separate competence framework entirely, which is where the CSCS card and its electrotechnical equivalent come in.
Enforcement rarely arrives as an inspector at the door. It arrives as a question during a sale, or an insurance query after an incident. Sometimes it is a landlord’s safety report flagging work nobody can account for.
Keep the notification reference, the certificate number and the date on the job record, beside the quote and the invoice. That is what makes a three-year-old question answerable. SendWork stores that with the job rather than in a separate folder. Consequently the record travels with the work instead of with whoever filed it.
None of this needs to slow a job down. It needs deciding before the quote goes out rather than on the morning of the second day.
The current scope, definitions and procedures sit in the relevant Approved Document, published by the government at the Approved Documents collection. Building regulations are amended more often than most trades notice, and country-level differences move independently. So treat the detail above as orientation and confirm the live position before you commit a price. Where enforcement or a disputed sale is already in play, take proper legal advice rather than working from a guide.
ON THE CONSUMER UNIT SWAP
Documentation only matters when someone asks for it. And when they ask, it’s already too late to organise.
A notification reference is worth nothing in an email you cannot find. Keep it on the job, next to the quote and the invoice, and the conveyancing question takes a minute.
More compliance coverage for UK operators in Licensing & Regulations: UK.