Do You Need Part P? Electrician's 2026 Decider

Do You Need Part P for This Job? The Electrician’s Decider

You need Part P whenever you carry out electrical installation work in a dwelling in England or Wales — but only some of that work is notifiable, meaning it has to be signed off against building regulations. Part P itself applies broadly to electrical work in homes; the question that actually matters on the day is whether this particular job is notifiable and, if it is, which route you’ll use to notify it. Get that call right and you stay compliant and keep the customer’s paperwork clean. Get it wrong and it can surface years later at sale.

Part P vs BS 7671 — don’t confuse them

Part P is a part of the Building Regulations in England and Wales dealing with electrical safety in dwellings. It doesn’t tell you how to wire — that’s BS 7671, the IET Wiring Regulations. Part P is about compliance and notification: which electrical work in a home must meet building regs and be signed off. You work to BS 7671; you notify (or self-certify) under Part P. Keeping the two straight is the first step to answering the notifiable question correctly.

Note the scope, too: Part P applies in England and Wales. Scotland and Northern Ireland have their own building standards regimes, so if you work across borders, don’t assume the same rules travel with you.

Notifiable or not: the working split

Not all electrical work in a home is notifiable. The broad principle is that higher-risk work is notifiable and minor, lower-risk work often isn’t.

Work that is generally notifiable includes installing a new circuit, replacing a consumer unit (the fuse board), and electrical work in special locations such as a room containing a bath or shower, where the risk is higher. Work that is generally non-notifiable includes like-for-like repairs, replacing accessories such as sockets and switches, and adding to an existing circuit — provided it’s outside those special locations.

Treat that as a decider, not gospel: the precise boundaries can be affected by current guidance and the special-location rules, so where a job sits close to the line, confirm the current position before you commit. The safe instinct is that anything involving a new circuit, the consumer unit, or a bathroom deserves a second look.

If it’s notifiable: your two routes

There are two compliant ways to handle notifiable work, and which one you use depends on whether you’re registered with a competent person scheme.

If you’re registered with a competent person scheme — such as those run by NICEIC or NAPIT — you can self-certify the work as meeting building regs, and the scheme notifies building control on your behalf and arranges the certificate to the homeowner. This is the faster, cheaper route per job and the main reason domestic sparks join a scheme.

If you’re not registered, you must notify building control before you start the work, and they’ll arrange inspection and sign-off. This costs more per job and takes longer, which is precisely why regular domestic electricians find scheme membership pays for itself.

Either way, the customer should end up with the right certification — an Electrical Installation Certificate for the work and the building-regs compliance notice — which they’ll need at sale or for their records.

What happens if you skip it

Skipping notification on notifiable work is a genuine problem, not a technicality. It’s a breach of building regulations, which can expose you and leave the homeowner with unauthorised work that has no compliance certificate. That gap tends to surface at the worst moment — when the property is sold and the buyer’s solicitor asks for the paperwork — and sorting it out retrospectively is slower and more expensive than doing it right first time.

There’s a reputational cost as well. The electricians who build referral-driven businesses are the ones whose jobs never come back to haunt the customer. Cutting the notification corner to save a bit of time is a false economy against that.

Quick decider

Before you start a domestic job in England or Wales, run it through this: Is it a new circuit, a consumer unit change, or work in a bathroom or shower room? If yes, treat it as notifiable. Am I registered with a competent person scheme? If yes, self-certify and let the scheme notify; if no, notify building control before starting. Will the customer get the right certificate at the end? Make sure they will. When the job sits on the boundary of notifiable, check the current guidance rather than guessing — a two-minute check beats an unauthorised-work problem years down the line.

FAQ

Is all electrical work in a home notifiable under Part P? No. Part P applies to electrical work in dwellings broadly, but only some of it is notifiable. Higher-risk work — new circuits, consumer unit changes, and work in special locations like bathrooms — is generally notifiable; minor work such as replacing a socket or adding to a circuit outside special locations often isn’t.

Does Part P apply in Scotland? No. Part P is part of the Building Regulations for England and Wales. Scotland and Northern Ireland have their own building standards systems, so check the relevant regime if you work there.

Can I self-certify Part P work myself? Only if you’re registered with a competent person scheme, such as those run by NICEIC or NAPIT. Registered electricians can self-certify and the scheme notifies building control. If you’re not registered, you must notify building control directly before starting the work.

What certificate does the customer get? For notifiable installation work, an Electrical Installation Certificate confirming it meets BS 7671, along with the building-regulations compliance notification. The homeowner should keep these — they’re often requested when the property is sold.

What are the risks of not notifying? It’s a breach of building regulations and leaves unauthorised work with no compliance certificate. It typically causes problems at sale when the paperwork is requested, and fixing it after the fact is slower and costlier than notifying correctly at the time.

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Related reading: Part P notification · NICEIC vs NAPIT · EIC vs MEIWC vs EICR · building regulations for trades