Electrics in bathrooms — zone rules explained
UK wiring regulations split a bathroom into zones (0, 1, 2, and outside zones) based on distance from water, and each zone restricts what can be fitted and to what IP (ingress protection) rating. A standard socket can't go in zone 1, for example. This is why bathroom electrical work is notifiable under Part P — it's assessed against these zones, not just wired like any other room.
Smart meters and electrical work
If you're having a consumer unit replaced or a major rewire, it's worth telling your energy supplier in advance — work on the supply side sometimes needs the meter isolated by the network operator, not just your electrician, and this can take longer to arrange than the electrical work itself.
Outdoor and garden electrics
Outdoor sockets, garden lighting, and supplies to sheds or outbuildings need weatherproof (IP-rated) fittings and their own RCD protection — standard indoor sockets and cabling aren't rated for outdoor use. This is notifiable work under Part P if it involves a new circuit.
What affects the cost
Cost depends on the scope of the job, how much of the property needs to be accessed, the age and condition of the existing wiring, and whether the consumer unit needs upgrading. A single socket replacement is quick and low-cost; a full rewire in an older property takes longer, partly because of the making-good work afterwards.
How often should wiring be tested?
The IET recommends an electrical inspection every 10 years for an owner-occupied home, 5 years for a rented property, and on change of occupancy for some property types. A periodic inspection is different from routine maintenance — it's a formal check against current wiring regulations, not just a visual look.
When does a consumer unit need replacing?
Older fuse boxes with rewireable fuses or plastic (rather than metal) casings don't meet current wiring regulations and are a common reason a rewire quote comes in higher than expected. A modern consumer unit uses RCBOs, which cut power to a single faulty circuit rather than the whole property.
Rewiring a listed or period property
Listed building consent can be needed for chasing cable runs into original plaster or masonry, even though the electrical work itself is assessed the same way as any other property under Part P. Conduit and surface-mounted cabling are sometimes used instead of chasing into walls specifically to avoid this — worth discussing with an electrician who's worked on listed properties before.
What a good electrical quote should include
A proper quote should state the scope of work, whether it's notifiable under Part P, an itemised breakdown of labour vs materials, the certificate you'll receive on completion, and how long the job is expected to take. If a quote is missing any of these, ask before agreeing to the work.