The electrician your builder wants on site.
Extension wiring lives or dies on timing — first fix before the boards go up, second fix after the plasterer, certificates before Building Control asks. Ish coordinates directly with your builder so you’re never the messenger.
Single room £900–£1,600 · single-storey extension £2,400–£4,200, inc. VAT
What’s included
- A wiring plan drawn against your architect’s or builder’s drawings
- First fix: cables, back boxes and circuits run before plastering
- Second fix: accessories, lighting and connections after decoration
- Direct coordination with your builder on programme dates
- Kitchen circuits designed for how kitchens are actually used — ovens, induction, island sockets
- Full testing, EIC and Building Control notification
Certification issued: Electrical Installation Certificate (EIC), Part P notified
How it goes
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01
Plans and pricing
Send the drawings. Ish marks up circuits and socket positions and prices first and second fix separately.
Quote within 5 working days
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02
First fix
We come in once the structure is up and before boarding. Everything photographed before the walls close.
2–4 days for a typical extension
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03
Second fix
After plaster and paint: faceplates, fittings, and connection through to the consumer unit.
1–2 days
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04
Test and certificate
Tested, certificated and notified — the paperwork Building Control wants, ready when they want it.
Certificate within 48 hours of completion
What moves the price
| Factor | Why it matters |
|---|---|
| Project size | A single room sits at £900–£1,600; single-storey extensions £2,400–£4,200; multi-room or two-storey work £4,500–£8,500. |
| The kitchen | Kitchens carry the electrical load of the whole project — £1,900–£3,400 is typical for a full kitchen fit. |
| First and second fix, or second only | Taking over someone else’s first fix means testing what’s buried before we’ll connect it. Honest, but it costs. |
| Consumer unit capacity | Extensions often need ways the old board doesn’t have. If a new board is needed, we price it at our standard rate, not a captive one. |
Questions we actually get asked
When should the electrician get involved?
Before the slab is poured, ideally. Underfloor routes, kitchen island feeds and outdoor supplies are cheap decisions early and expensive ones later.
Can you work with our builder?
That’s the normal arrangement — we take programme dates from the builder and turn up when the job is ready. Half our extension work comes from builders who’ve had us on site before.
Who tells Building Control?
We do. Part P notification for the electrical work is part of our price, and the EIC goes to you and into the Building Control file.
The builder’s quote includes “electrics”. Why use you?
Sometimes that’s fine. Ask who exactly does the work, whether they’re registered to self-certify, and what certificate you’ll hold at the end. If the answers are vague, that’s your answer.
Can the new circuits go on our old fusebox?
If it has spare ways and is in sound condition, yes. If not, we’ll show you why, price a new board plainly, and let you decide.
Tell us what needs doing.
Use the instant estimate tool for a realistic price range in two minutes, or call the office and speak to Dawn.