What is Part P? Navigating UK Building Regulations for Electrical Installation Work

In the United Kingdom, ensuring the safety and compliance of electrical installations in homes is governed by a specific section of the Building Regulations known as Part P.

This article aims to explain what Part P is, delve into the broader context of the Building Regulations, and highlight why both electricians and homeowners must be mindful of these regulations.

What is Part P?

Part P of the Building Regulations was introduced in 2005 and applies to England and Wales.

It sets out the requirements for electrical installations in domestic properties to ensure they are safe.

The regulation is designed to reduce the risks of death or injury from electric shocks and fires caused by faulty electrical work.

Understanding the Building Regulations

The Building Regulations in the UK are statutory instruments that set standards for the design and construction of buildings.

They cover various aspects like fire safety, energy efficiency, accessibility, and indeed, electrical safety.

These regulations are in place to ensure the health and safety of people in and around buildings.

Who Do the Building Regulations Apply To?

The Building Regulations apply to the construction of new buildings and alterations or extensions to existing buildings, including domestic electrical installations.

Therefore, they are relevant to a wide range of individuals and professionals including builders, architects, electricians, and homeowners.

Where does Part P affect?

The Relevance of Part P for Electricians

For electricians, compliance with Part P is a legal requirement when carrying out electrical installation work in a domestic setting.

This includes new installations, alterations, or additions to existing installations.

Electricians must ensure that all work complies with the UK national standard, BS 7671 – Requirements for Electrical Installations.

Why Homeowners Need to Pay Attention to Part P

Homeowners need to be aware of Part P for several reasons:

  1. Safety: The primary purpose of Part P is to keep people safe. Non-compliant electrical work can pose significant risks.
  2. Legal Compliance: If electrical work in a home doesn’t comply with Part P, the homeowner could face problems when selling the property or might need to pay for remedial work.
  3. Insurance: Non-compliance with Part P can invalidate home insurance policies.

Self-Certification and Self-Notification

Part P allows for self-certification by competent persons.

Electricians registered with a competent person scheme can self-certify their work as compliant with the Building Regulations.

This means they can notify the local authority building control department of the work they have carried out, eliminating the need for or costs of a separate inspection.

Fines for Non-Compliance

Adhering to Part P of the Building Regulations is not just a standard practice but a legal requirement in the UK, crucial for ensuring the safety and compliance of electrical installations in residential properties.

Neglecting to comply with these regulations can lead to significant legal and financial consequences for both homeowners and electricians.

Failure to comply with Part P can result in substantial fines. In cases where electrical work does not meet the Building Regulations and either a homeowner or an electrician is found responsible, they can face fines of up to £5,000.

This hefty penalty underscores the seriousness with which these regulations are enforced.

But the financial implications don’t end there. Local authorities have the authority to enforce corrective actions on non-compliant electrical work.

This means individuals may be required to rectify the faulty installations at their own expense, which can add a considerable financial burden on top of the fines.

The Role of Competent Person Schemes

Competent person schemes were established to simplify the process of complying with Part P.

Electricians who are members of these schemes are assessed to ensure they have the skills and knowledge to carry out compliant work.

Notable schemes include those run by bodies like NICEIC, ELECSA, and NAPIT.

Examples of Work Covered by Part P

Part P covers a range of electrical installation work in homes including:

  • New circuits.
  • Replacement of consumer units (fuse boxes).
  • Any changes to existing circuits in a ‘special location’, like near a bath or shower.

Exceptions to Part P

Certain types of work are not notifiable under Part P, provided they are minor, such as:

  • Replacing sockets or light fittings.
  • Installing additional sockets or lights on existing circuits (excluding special locations).

Seeking Advice on Part P and Building Regulations

For those seeking guidance on Part P and the Building Regulations, there are several reliable sources available.

The first point of reference should be the official UK Government website, which provides detailed information on all parts of the Building Regulations.

It offers comprehensive guides that are particularly useful for homeowners and professionals alike.

Electricians and other trade professionals can also turn to industry bodies such as the NICEIC, ELECSA, or NAPIT.

These organisations not only offer membership to competent person schemes but also provide resources, training, and updates on the latest regulatory changes.

Local authority building control departments are another valuable resource. They can offer advice specific to your area and can clarify whether certain electrical work is notifiable under Part P.

For complex projects or for those seeking more tailored advice, consulting a qualified building surveyor or an architect can be beneficial.


Part P of the Building Regulations plays a critical role in ensuring the safety of electrical installations in domestic environments.

Both electricians and homeowners need to be aware of and comply with these regulations.

Electricians should consider joining a competent person scheme for ease of self-certification, while homeowners need to ensure that any electrical work carried out in their homes complies with Part P for safety, legal, and insurance purposes.

Understanding and adhering to building regulations is not just about following rules; it’s about safeguarding homes and lives against electrical hazards.