Part P Electrical Regulations — What Homeowners Need to Know

Notifiable work is any work where errors are most likely to cause death, serious injury, or fire. Under Part P, the following are notifiable: installation of a new circuit anywhere in a home; replacement of a consumer unit (fuse board); addition of a circuit in a bathroom or shower room within 0.6m of a bath or shower; any circuit in a kitchen that is less than a metre from the sink or a zone around cooking appliances; any electrical installation in a room containing a bath or shower; garden circuits (sockets, lighting, or other circuits outdoors); installation of outdoor electrical equipment including outbuildings, garages, and carports; circuits near swimming pools.

Non-notifiable work is low-risk, like-for-like replacement work. A competent person (which includes a careful, knowledgeable DIYer) can legally do: replacing a damaged socket or switch with a new one of the same type in the same location; replacing a light fitting like-for-like; adding a fused spur from an existing circuit to power a single appliance; replacing cable that forms part of an existing circuit in an emergency (like-for-like replacement in the same position). Note: even non-notifiable work must meet the requirements of BS 7671 (the IET Wiring Regulations). The fact that you do not need to notify does not mean you can do the work unsafely.

Registered electricians belong to a Competent Persons Scheme (CPS) — NICEIC, NAPIT, ELECSA, STROMA, BRE, or TrustMark. Membership of a CPS means the electrician has been assessed and can self-certify their work. Self-certification means the electrician issues the certificate themselves and notifies the local authority directly, without a Building Control inspection. This is faster and cheaper than the alternative route (Building Control notification). If your electrician is not registered with a CPS, the alternative is to notify your local Building Control before work starts and have a Building Control inspector check the work on completion. This is slower, more expensive, and requires the inspector to attend your property.

Three certificates matter for residential electrical work. The Electrical Installation Certificate (EIC) is issued by a registered electrician for any new installation (new circuits, consumer unit replacement). It confirms the work was done correctly and tested. The Minor Works Certificate is issued for additions to existing circuits — adding a socket, a new light point, a fused spur. The Electrical Installation Condition Report (EICR) is a periodic inspection and test of existing wiring — mandatory for rental properties every 5 years. The EICR classifies observations as C1 (danger present, immediate action required), C2 (potentially dangerous), C3 (improvement recommended), or FI (further investigation required). C1 and C2 observations require remedial work.

If notifiable electrical work was done without a registered electrician and without Building Control notification, you have a problem. When selling the property, your solicitor must declare the work and provide the relevant certificate — if you cannot, it creates a legal issue that can stall or prevent the sale. Your home insurer may decline a claim related to a fire if it is traced to non-compliant electrical work. The work may be dangerous — the whole point of Part P is to catch potentially lethal errors. Retrospective compliance is possible through an EICR — but if the work is found to be dangerous, you must pay to remediate it.