Three steps to hiring the right electrician
First, confirm they're registered with NICEIC or NAPIT and ask to see their registration number. Second, get a written quote that itemises labour and materials separately, not just a total. Third, ask what certificate you'll receive when the work's done — for notifiable work, you're entitled to a Building Regulations compliance certificate.
DIY electrical work vs when you need a professional
Under Part P of the Building Regulations, certain electrical work in a home is notifiable — it has to be carried out by a registered electrician who can self-certify it, or separately inspected by your council's building control. New circuits, consumer unit replacements, and any new work in a kitchen or bathroom are notifiable. Like-for-like socket or switch swaps usually aren't.
How long does electrical work take?
A socket or switch swap is usually under an hour. A consumer unit replacement is typically a full day, often with the power off for several hours. A full rewire in an occupied property commonly takes 5 to 10 days depending on size and access, plus time afterwards for plastering and redecorating that isn't part of the electrical work itself.
Common electrical myths, busted
"If it's not broken, the wiring's fine" — wiring can be dangerous long before it visibly fails. "Any handyman can do electrics if it's small" — scope, not size, determines whether work is notifiable. "A tripped RCD means the RCD is faulty" — usually it means something else on that circuit is, and the RCD is working as intended.
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.
Signs your property needs rewiring
Round-pin sockets, fabric or rubber-insulated cabling, a fuse box with a wooden back, or lights that dim when an appliance switches on are all signs the wiring is overdue for replacement. Most UK wiring is rated to last 30 to 40 years before it needs a full rewire.
LED lighting and energy-saving rewires
Swapping halogen downlights for LEDs is usually straightforward, but older dimmer switches often aren't compatible with LED drivers and need replacing alongside the bulbs, or you'll get flickering or a limited dimming range. If you're rewiring a room anyway, it's worth speccing LED-compatible circuits from the start rather than fixing dimmer compatibility later.
Powering a garden office or outbuilding
Running power to a garden office or outbuilding usually means an armoured cable buried below the recommended depth, its own small consumer unit, and RCD protection at the supply end. This is notifiable work and typically needs building control sign-off alongside the electrical certification.