New build and extension wiring in Bristol
We handle new build wiring Bristol developers and self-builders rely on: complete first and second fix for new builds, loft conversions, extensions, offices and shops, designed and certificated to fit your builder's programme. Rewiring an existing house has its own page.
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Fixed detailed quotes
Domestic, commercial & industrial
What we wire
From a single room to a whole development, designed, installed and certificated.
Need the fuse board done too?
Rewires usually pair with a modern consumer unit.
Consumer unit replacement →What first and second fix covers
New build wiring in Bristol, from an empty shell to a certificated installation.
Everything that goes in before plastering: cable runs, back boxes, the consumer unit position and any containment, placed to the agreed circuit design so sockets, switches and lights land exactly where the drawings show.
Once the walls are closed: sockets, switches, light fittings and the consumer unit itself, finished and connected, followed by full testing and the certification building control expects.
First fix and second fix are booked around your builder's programme, not the other way round, so the electrics never hold up plastering, flooring or the next trade on site.
An Electrical Installation Certificate and, where the work is notifiable, Part P compliance paperwork through our NAPIT registration, ready to hand to building control, a buyer's solicitor or your insurer.
What the builder provides
Scaled drawings or a site visit so we can price accurately, clear access during first fix, and enough notice of programme changes to keep both trades on schedule.
What Bristol customers say
"Great quality work, punctual and very clean. Highly recommend."
"Great professionalism and clear communication. Luke was able to get us booked in the same week."
"The most reliable and knowledgeable electricians I've come across. Extremely professional."
What new build and extension wiring costs
New build and extension wiring is priced from the specification: the number of circuits, points and outlets, the consumer unit and any sub-mains, provision for EV charging or a heat pump, and the testing and certification building control expects. You get a written, itemised price before first fix, and it stays the price you pay unless the specification changes.
Rewiring an existing house is a different job with its own price band. See our house rewiring in Bristol page for full and partial rewires (from £4,500 + VAT) and the house rewire cost guide.
How we price: no surprises
Every job is different, so we look before we quote.
We check what's actually there before quoting anything.
The price we agree is the price you pay.
If we find anything unexpected, we stop, explain it and agree any change with you before continuing.
Estimates are always free, and there's never any obligation.
Wiring regulations: what the law requires
Wiring a new build, a loft conversion, an extension, an office or a shop is notifiable work under Part P of the Building Regulations, just as a full rewire is. That means the work must be signed off, either through your council's Building Control team or by a registered electrician working under a competent person scheme. Electrical Safety First is clear that homeowners and landlords must be able to prove the work meets Part P, and a council can require non-compliant work to be altered or removed.
We are NAPIT approved, a government-recognised competent person scheme for electrical work in dwellings, so we self-certify your rewire or installation as we go. There is no separate application to Building Control for you to make, and no extra council fee. You get an Electrical Installation Certificate confirming the work meets BS 7671, the IET Wiring Regulations, plus Part P compliance paperwork through our NAPIT registration. Keep both with your house paperwork: a solicitor, mortgage lender or insurer may ask to see them.
BS 7671 itself is updated periodically, most recently with Amendment 4:2026, published in April 2026 and mandatory for all new work from 15 October 2026. We keep our certification current, so the paperwork you get reflects whichever edition applies on the day. For more on notifiable work and who can sign it off, see our Part P building regulations guide, or get in touch if you would like us to talk it through for your project.
Frequently asked questions
Do you do full house rewires?
Yes, and they have their own page. Full and partial rewires of existing homes are surveyed and priced on our house rewiring in Bristol page, from £4,500 + VAT. This page covers new builds, extensions, loft conversions and fit-outs.
What is the difference between first fix and second fix?
First fix is everything that goes in before plastering: the cables, back boxes, consumer unit position and any containment. Second fix is the visible finish once the walls are closed: sockets, switches, lights and the board itself, followed by testing and certification. We schedule both around your builder's programme.
Can you work alongside our builder?
Yes, new builds, lofts and extensions are usually a team effort. We coordinate directly with your builders and contractors so first fix and second fix land on schedule.
Does extension wiring need to be notified to building control?
Usually, yes. A new circuit, or any electrical work in a kitchen or bathroom, is notifiable under Part P of the Building Regulations. As a NAPIT registered firm we self-certify and notify it for you, and you receive the compliance certificate for your building control file.
What certificate will I get after the work?
An Electrical Installation Certificate confirming the work meets BS 7671, the current IET Wiring Regulations, plus Part P compliance paperwork through our NAPIT registration. Keep both with your house paperwork. They are what a buyer's solicitor, a mortgage lender or your insurer will ask to see.
Can you plan for an EV charger, heat pump or solar at first fix?
Yes, and it costs far less at first fix than afterwards. We run the supply and containment for an EV charger, a heat pump or a solar inverter while the walls are open, and size the consumer unit for it, even if the equipment is fitted later.
Get your free wiring quote
A few quick details and we'll come back to you with next steps. Prefer to talk? Call 0117 2447 382
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TrustMark Registered Business and Trading Standards Approved, licence no. 4257835. TrustMark is the Government Endorsed Quality Scheme for work in and around the home, and Trading Standards has also checked and approved us under TrustMark's Trading Standards Approved scheme. We are registered for domestic electrical work through NAPIT, our scheme provider. Check our registration on TrustMark