Whose job is it to get the electrics signed off on your build? (It's not who you'd think)

You've run a clean job. A Thames Valley extension, snagged and swept, the client's chuffed and reaching for the chequebook. Then it lands: "My solicitor's asking for the electrical certificate... where is it?" And nobody on site is quite sure whose job that was.

I get pulled into this after the fact more often than you'd think. So let me spell out who's actually on the hook, because the answer surprises most builders... and it changes how you should be picking your sparky.

The duty is your client's. The risk is yours.

Here's the bit people get wrong. Legally, the responsibility for complying with the Building Regulations sits with the property owner, your client, not with you, and not even with the electrician. On paper, if the electrics were never signed off, it's the homeowner who's committed the offence.

But you know how it works on site. The client doesn't discover that gap. You do... at completion, when the certificate that unlocks your final payment doesn't exist. The legal duty is theirs; the commercial pain is yours. A client won't release the balance on a job they can't prove is compliant.

What actually has to happen... and when

Certain electrical work in a home is notifiable under Part P of the Building Regulations (England). The common ones on a build:

A new circuit run from the consumer unit
A consumer unit (fuse box) replacement
Rewiring or new circuits in a bathroom or shower room

For anything notifiable, there are two legal routes:

A registered competent-person scheme electrician (NICEIC, NAPIT and the like) does the work and self-certifies it, notifying Building Control on your behalf.
Someone tells Local Authority Building Control before the work starts, and they inspect it themselves.

Either way, the finish line is the same: a Building Regulations Compliance Certificate issued to your client. No certificate, no clean sign-off.

Where it comes off the rails

The wreck I see is route two that never happened. An unregistered sparky did the first fix, nobody notified anybody, and it only surfaces months later when the client's selling or the solicitor asks.

Now you're stuck. Local Authority Building Control can inspect it retrospectively and regularise it... but that means a fee, and an inspector who may want walls opened back up to see cable they missed the first time. Worst case, work that can't be certified as it stands. None of that is a bill you want landing on a finished extension with your name on the schedule.

How I take that risk off your plate

I'm NAPIT-registered, which means I sit on route one. When I do the notifiable work on your build, I self-certify it and notify Building Control myself... you don't chase a council, and the compliance certificate reaches your client as part of the job. Your completion sign-off doesn't stall waiting on me.

It's the same reason it pays to have your electrician's inspection and testing sorted properly, and to bring a registered spark in early on anything from a single circuit to a full rewire... so the paperwork is baked in, not bolted on in a panic.

(Worth knowing: Part P is England. Wales diverged back in 2014 and Scotland runs a separate system, so check the rules where you're building.)

Before you book the next job

If you're pricing an extension or renovation in Slough, Windsor, Maidenhead or across the Thames Valley and want the electrics to land certified (no retrospective inspections, no stalled completion) talk to me early.

I'm a NAPIT-registered electrician based in Slough. For a free, no-obligation quote, get in touch at bphelectrics.co.uk and I'll make sure the sign-off is one thing you don't have to worry about.