Seymour Chambers, 92 London Road, Liverpool L3 5NWAvailable day or night · 24/7 Emergency
info@fixelectricalnw.co.uk
Fix Electrical (NW) Ltd
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New Builds & Extensions · Liverpool & the North West

First fix, second fix, sign-off,
New Build & Extension Electrician in Liverpool.
Working alongside your builder without slowing them down.

Extensions, loft conversions, garden rooms, new builds and full renovations. Priced against the actual drawings, scheduled around the other trades, certified and self-notified.

15+ years in the trade · NAPIT approved · £2m insured · 24/7 emergency line

15+ years
In the trade
NAPIT approved
Registered contractor
£2m insured
Public liability
Certified
JIB Gold Card · C&G 2391
Service Overview

New Builds & Extensions in Liverpool, the full picture.

Everything below is what an honest, NAPIT-approved contractor will actually do for you, not what a marketing agency thinks sounds good on a website.

What it covers

Electrical work for new builds, extensions and full renovations, from reading the drawings and agreeing socket / lighting positions with you, through first-fix cabling before plaster, second-fix fitting after decoration, consumer unit uprates, EV charger provision, garden room supplies, and full initial verification and certification when the build is complete.

Who it's for

Homeowners doing an extension, loft conversion or garden room; developers on single-plot or small-plot new builds; builders wanting a reliable electrical subcontractor who turns up when scheduled; architects and PMs wanting one electrical contractor to hold from first-fix to sign-off.

When you need it

Ideally at design stage, decisions about circuit layout, EV provision, kitchen socket positions and lighting design are much cheaper made on paper than in plaster. Realistically we're often brought in once the shell is up and the builder needs the first-fix window booked.

Why professional matters

Electrical work on a new build or extension is a phased job, first fix before plaster, second fix after decoration, and it has to schedule around every other trade without becoming the bottleneck. A NAPIT-registered contractor self-certifies the notifiable work, saving you a separate building control visit and fee.

What Happens If You Leave It

The cost of putting it off.

Every one of these is something we see weekly. None of them get better on their own.

Electrical decisions made too late

Retrofitting sockets, downlights or extra circuits after plaster is done doubles the cost and rarely looks as clean. Every position decided post-plaster is a chase into fresh plaster.

Under-specced consumer unit

New extensions frequently need consumer unit uprates, undersized distribution boards can't accommodate the new circuits, forcing an awkward retrofit part-way through the build.

EV, solar and heat pump provision skipped

Provision for EV charging and low-carbon services is trivially cheap during first fix and expensive later. Skipped at first-fix, it becomes retrofit surface conduit two years later.

Non-notified work fails final sign-off

Notifiable electrical work carried out by a non-registered installer requires building control notification and inspection, an avoidable cost, delay and paperwork trail.

Our Process

How the job actually runs, start to finish.

  1. Step 1

    Design review & scope

    We work off the drawings with you or your builder, agreeing socket positions, lighting design, circuit layout and any EV / low-carbon provision.

  2. Step 2

    Fixed written quote

    Priced against the actual drawings and scope, never a per-point guess.

  3. Step 3

    First fix

    Back boxes set, cables run through stud, floor voids and chased where needed, before plaster.

  4. Step 4

    Second fix

    Faceplates, downlights, feature lighting, extractors, smoke alarms and consumer unit fitted after plaster and decoration.

  5. Step 5

    Test, certify & sign off

    Full initial verification, Electrical Installation Certificate issued, NAPIT self-certification lodged.

Benefits

Why customers stick with us.

Priced off drawings, not per point

You get a fixed price against the actual scope, not a padded per-point rate.

Scheduled to your build programme

First-fix and second-fix windows agreed with the builder so we're never holding up plaster or decoration.

Self-notified, no separate building control fee

NAPIT registration lets us self-certify notifiable work, saving you time and cost.

Future-proofed first-fix

EV provision, home-working sockets and extra lighting circuits planned in at first-fix, not retrofitted later.

One contractor from design to sign-off

Same electrician on-site through first-fix, second-fix and testing.

Compliance-ready paperwork

Full certification and self-notification lodged, one less thing for your builder or PM to chase.

In Detail

Everything else worth knowing.

The specific materials, methods and situations that make this job go well, or badly, depending on who's doing it.

Extensions, loft conversions and garden rooms

Extensions almost always require additional circuits back to the main consumer unit, often triggering an uprate of the board itself. Loft conversions bring notifiable work (smoke alarms interlinked to existing, escape lighting considerations, new circuits). Garden rooms need a properly-sized SWA sub-main from the house, an appropriate consumer unit in the room itself, and RCD protection matched to the outdoor cable route.

First fix, what actually happens

First fix is the phase before plaster: back boxes for sockets and switches set into the wall, cabling run through stud walls and floor voids, cables chased into blockwork or brickwork with the correct depth and clip centres, provision left for downlights and feature fittings, and cable runs labelled. We coordinate with the plasterer so nothing is buried where it can't be traced.

Second fix and testing

Second fix is after plastering and (usually) decorating: faceplates, light fittings, downlights, extractor fans, interlinked smoke and heat alarms, consumer unit fitted or uprated, and the new circuits energised. Full initial verification testing follows: insulation resistance, earth loop, RCD trip time, polarity, all logged on the Electrical Installation Certificate for the property file.

Residential vs commercial new builds

Residential new-build and extension work focuses on layout, decor-friendly finishing and NAPIT self-notification for domestic notifiable work. Small commercial new-build work, coffee shops, salons, offices, light industrial units, brings heavier supplies, DNO applications, containment on show, emergency lighting to BS 5266 and PAT testing at hand-over. We cover the domestic side end-to-end and take on light commercial new builds after a site survey.

Recent Work

Recent new builds & extensions projects.

A snapshot of recent installations from our own vans across Liverpool and the North West, no stock photography.

Commercial first-fix electrical containment and circular light fittings during fit-out
Commercial fit-out lighting with surface-mounted conduit and fluorescent tubes
Commercial fit-out lighting works in progress, Liverpool
Common Questions

New Builds & Extensions, answered.

Straight answers to the questions we get on the phone every week. If yours isn't here, call 07351 982452 and ask.

How early should we get you involved in the build?

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As early as possible, ideally at design stage. Decisions about socket positions, lighting layout and EV / low-carbon provision are much cheaper made on paper than after plaster.

Will we need a new consumer unit for an extension?

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Often yes, new circuits usually need to hang off a modern RCBO board. We check on the survey and price the uprate transparently with the extension quote.

Do you handle the building control side?

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For notifiable domestic work we self-certify under our NAPIT registration, you don't need a separate building control fee or inspection for the electrical works.

Can you work alongside our builder?

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Yes, we routinely subcontract to builders on extensions, lofts and garden rooms. Or we work directly for you and coordinate with the builder.

How much does new-build / extension wiring cost?

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Priced against the actual drawings and scope, never per point. Free review of your drawings, fixed written quote before any work starts.

Can you future-proof for EV, solar or heat pump?

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Yes, provision left in at first-fix costs a fraction of the retrofit price. Highly recommended even if you're not installing straight away.

Do garden rooms need special treatment?

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Yes, appropriately-sized SWA sub-main, dedicated consumer unit in the room, and outdoor-rated protection. All standard for us.

Do we get a certificate for the works?

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Yes, full Electrical Installation Certificate with schedule of circuits, plus NAPIT self-certification lodged with the local authority.

Related Services

You might also need…

House Rewires

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Consumer Unit Changes

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EV Charger Installation

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Lighting Design & Installation

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Next Step

Get a straight quote on your new builds & extensions.

Free on-site survey. Fixed price in writing before any work starts. NAPIT-approved, £2m insured, certified and self-notified where required.

Request A Free Estimate Call 07351 982452

Available day or night · 24/7 Emergency Call-Out

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