Compliance

Part P Building Regulations Explained for Homeowners

15 March 20267 min read

Part P Building Regulations Explained for Homeowners

If you're planning any electrical work at home — whether that's a new consumer unit, an extra ring circuit, or rewiring a kitchen — you'll need to understand Part P Building Regulations. It's one of those subjects that causes a lot of confusion, but the core principles are straightforward once you know what you're looking at.

This guide covers what Part P covers, what work requires notification, who can carry it out, and what happens if the rules aren't followed. Whether you're in Rochester, Maidstone, or further across the South East, the same regulations apply.

What Is Part P of the Building Regulations?

Part P is the section of the Building Regulations for England that deals with electrical safety in dwellings. It came into force in January 2005 and applies to all electrical installation work carried out in homes — including houses, flats, and outbuildings used in connection with a dwelling.

Its purpose is simple: to reduce the risk of injury and death from poor electrical work. Before Part P existed, anyone could carry out domestic electrical work without any formal notification or inspection. The results were — predictably — sometimes dangerous.

Under Part P, certain types of electrical work must either be carried out by a registered competent person or be submitted to your local authority building control (LABC) for inspection and approval.

The technical standard that underpins Part P is BS 7671 — the IET Wiring Regulations, currently in its 18th edition. Any electrical installation work on a domestic property must comply with BS 7671.

What Work Does Part P Cover?

Part P applies to electrical installations in:

Dwellings (houses, flats, maisonettes)
Gardens and outbuildings attached to or associated with a dwelling
Extensions and conservatories
Communal areas of blocks of flats (in some circumstances)

It does not apply to commercial premises, which fall under different parts of the Building Regulations.

Notifiable vs Non-Notifiable Work

Not all domestic electrical work requires formal notification. Part P splits work into two categories.

Notifiable work must be either carried out by a registered competent person (who self-certifies) or be approved by building control before and after completion. This includes:

Installing a new circuit
Replacing a consumer unit (fuseboard)
Any work in a kitchen or bathroom — including adding a socket or light fitting in these locations
Work in a room containing a bath or shower (Zones 0, 1, and 2 under BS 7671)
Any work in a garden or outbuilding that involves a new circuit from the main dwelling

Non-notifiable work can generally be carried out without notification, provided it still complies with BS 7671. This includes:

Like-for-like replacement of accessories (sockets, switches, light fittings)
Adding a spur to an existing circuit in most rooms (not kitchens or bathrooms)
Repairs and maintenance

The distinction matters. If you're simply swapping a socket faceplate for a brushed steel version, that's non-notifiable. If you're adding a new socket outlet in your kitchen, that's notifiable — even if it looks like minor work.

Who Can Carry Out Notifiable Work?

There are two routes for ensuring notifiable work is compliant.

Route 1: Use a Registered Competent Person

The most common route is to hire an electrician registered with a government-approved competent person scheme. The main schemes for electrical work are:

NICEIC
NAPIT
ELECSA

Electricians registered with these schemes are assessed to demonstrate their technical competence. When they complete notifiable work, they issue a BS 7671 Electrical Installation Certificate and notify the relevant building control authority on your behalf. You don't need to do anything extra.

Cleary Electrical is NICEIC-approved, which means every piece of notifiable work we complete is properly certified and registered.

Route 2: Building Control Approval

If you hire an electrician who isn't registered with a competent person scheme, the work must be approved through your local authority building control. This means:

Submitting a building regulations application before work begins
Paying a building control fee (typically £200–£400 depending on the local authority)
Having the completed work inspected and tested by a building control inspector

This route is slower, more expensive, and relies on you taking the administrative steps yourself. Most homeowners — and most electricians — use the competent person route instead.

What Documentation Should You Receive?

Once notifiable work is complete, your electrician should provide:

An Electrical Installation Certificate (EIC) — signed by both the designer and installer (sometimes the same person), and by the inspector who tested the work
A Building Regulations Compliance Certificate — issued by the competent person scheme (e.g. NICEIC) confirming the work has been registered

Keep these documents safe. You will need them when you sell your property. Solicitors routinely ask for electrical certificates during conveyancing, and missing paperwork can delay or complicate a sale.

For smaller notifiable jobs, a Minor Electrical Installation Works Certificate may be used instead of a full EIC — for example, when adding a single circuit or spur rather than a full installation.

What Are the Consequences of Ignoring Part P?

Carrying out notifiable work without compliance has real consequences:

Insurance issues — if non-compliant work contributes to a fire or electrical fault, your buildings or contents insurer may refuse to pay out
Problems selling your home — buyers and their solicitors will ask for certification; if it doesn't exist, you may have to pay for remedial work or retrospective inspections
Safety risks — the regulations exist because poorly installed electrics kill people

Retrospective regularisation is possible — a registered electrician can inspect the existing work and, if it's compliant with BS 7671, issue the appropriate certification. But it costs money and isn't guaranteed if the original work was substandard.

When to Call a Qualified Electrician

You should contact a registered electrician for any of the following:

Installing or replacing a consumer unit
Any new circuit — lighting, sockets, electric vehicle charger, cooker, hot tub
Rewiring — full or partial
Any electrical work in a bathroom or kitchen
Adding external lighting or power to a garage, outbuilding, or garden
Investigating repeated tripping of circuit breakers or RCDs
Installing underfloor heating

If you're unsure whether your planned work is notifiable, ask a qualified electrician before you start. It's a straightforward question and takes 30 seconds to answer.

Part P and Rental Properties

Landlords in Kent and across the South East should be aware that Part P compliance sits alongside — but is separate from — the requirement for a periodic Electrical Installation Condition Report (EICR). Since 2020, private landlords in England must have an EICR carried out every five years and provide a copy to tenants.

Any remedial work identified by an EICR and subsequently carried out may itself be notifiable under Part P, requiring proper certification.

A Practical Summary

| Work Type | Notifiable? | Who Can Certify? | |---|---|---| | New consumer unit | Yes | Registered competent person or LABC | | New circuit (any room) | Yes | Registered competent person or LABC | | Kitchen or bathroom electrical work | Yes | Registered competent person or LABC | | Like-for-like socket replacement | No | Any competent person | | Adding spur (non-kitchen/bathroom) | No | Any competent person |

Get a Free Quote from Cleary Electrical

Cleary Electrical is a NICEIC-approved electrical contractor based in Rochester, Kent, covering the South East including Surrey, Greater London, Sussex, Essex, and Hertfordshire. We handle domestic electrical work correctly — with proper certification and full Part P compliance as standard.

If you're planning electrical work at home and want straightforward advice or a free, no-obligation quote, get in touch via our contact page.

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