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.
NICEIC & NAPIT registration explained
NICEIC and NAPIT are the two largest government-authorised Competent Person Schemes for electrical work in the UK. Joining requires a recognised qualification (City & Guilds 2382, the 18th Edition Wiring Regulations, plus a Level 3 NVQ and City & Guilds 2391 for inspection and testing), and ongoing assessment. A registered electrician can self-certify notifiable work without a separate council inspection.
Satisfaction and aftercare — support beyond the job
A registered electrician's paperwork doesn't end when the job does — you should receive a Building Regulations compliance certificate (for notifiable work) or an Electrical Installation Certificate, which you'll need if you sell the property or make an insurance claim. Keep this with your household paperwork.
Electrical emergencies — what to do
If you smell burning, see sparks, or a breaker keeps tripping and won't reset, turn off the affected circuit and call an electrician. Don't reset a tripped breaker more than once if it trips again immediately — that usually means a fault, not a one-off.
Electrical safety for landlords
Since 2020, landlords in England must have an EICR carried out every 5 years and provide a copy to tenants. Failing to do so can result in a fine of up to £30,000. If an EICR flags unsatisfactory work, it has to be fixed within 28 days or a shorter period the report specifies.
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.
New build and extension electrical work
Wiring an extension or new build from scratch is different from rewiring an existing room — it's planned around final wall positions and fittings before plastering, so timing with your builder matters. First-fix electrical work (cabling inside walls) has to happen before plastering; second-fix (sockets, switches, fittings) after.