Part P is the electrical safety section of the UK Building Regulations. It applies to every domestic electrical installation in England. Get it wrong and you can invalidate your insurance, fail your house sale searches, and face enforcement from Leeds City Council. Here is what you actually need to know.

What Part P covers

Any fixed electrical work in your home is subject to Part P. That includes consumer unit replacements, new circuits, extending existing circuits, and any work in a kitchen or bathroom regardless of size. It does not cover replacing a plug top or changing a light bulb.

Notifiable vs non-notifiable

Notifiable (must be signed off by Building Control or a registered electrician)

  • New consumer unit
  • New circuit added to the consumer unit
  • Any work in a bathroom (special location)
  • Any work in a kitchen involving new circuits
  • Rewiring

Non-notifiable (still must meet BS 7671, but does not need notification)

  • Adding a socket to an existing circuit
  • Replacing a socket or switch
  • Replacing a light fitting

DIY: what you can do legally

You can replace like-for-like a socket, a switch or a light fitting yourself. Anything more, and if you are not qualified, the law requires a registered electrician to notify the work. This is not optional.

Why a Part P registered electrician matters

Part P registered electricians (NICEIC, NAPIT, ELECSA, Stroma) can self-certify their work. That means they notify Leeds City Council automatically, and issue you a Building Control Compliance Certificate as evidence. If you use an unregistered electrician, the work has to go through Building Control directly, costing £250+ and taking weeks.

What happens if you do not notify

  • Your buildings insurance may not cover fire damage caused by the work
  • Home buyers solicitors will pick it up in searches and require retrospective certification, which can cost £500+
  • Leeds City Council can serve enforcement notices requiring the work be removed or made compliant
  • Fines up to £5,000

Checking your electrician is registered

Look up their business on the NICEIC or NAPIT register (both are free to search). Ask for their registration number and check it matches. Ask for a copy of a recent certificate to verify the format looks legitimate.