House Rewiring in Cardiff
Full and partial rewires carried out to BS7671 18th Edition wiring regulations. NAPIT notified. Electrical Installation Certificate on completion. Free survey, no call-out fee.
A lot of Cardiff's housing stock dates back to the 1950s, 60s and 70s. Properties from that era were wired to standards that have since been replaced several times over. If your home is throwing breakers, your EICR has come back unsatisfactory, or you're buying or selling and the surveyor has flagged the wiring, it's time to get it sorted. We carry out full and partial rewires across Cardiff and South East Wales, from Roath to Canton, Pontprennau to Penarth.
Older council properties in Cardiff, particularly around Ely, Llanrumney and Rumney, sometimes still have aluminium wiring installed during the 1960s and 70s. Aluminium wiring can cause connection points to overheat over time and carries a higher fire risk than modern copper twin and earth. If your property was built between 1965 and 1975, it's worth having it checked.
What's involved in a house rewire?
A full rewire means stripping out all the old wiring and starting again. Every circuit in the house, including lighting, ring circuits, spur outlets, cooker circuits, shower circuits and any outdoor circuits, gets replaced. New twin and earth cable is run throughout, new back boxes fitted, and a new consumer unit installed with full RCD or RCBO protection.
The work is done in two stages. First fix involves running the new cables before plastering or boarding. Second fix is the final connection of switches, socket outlets, light fittings and the consumer unit. Testing takes place throughout and a full Electrical Installation Certificate is issued at the end.
Full rewire vs partial rewire
A full rewire replaces every cable and fitting in the property. A partial rewire replaces only the circuits that have failed or deteriorated. The right approach depends on the age and condition of the existing installation.
Full Rewire
All existing wiring stripped out and replaced. Right for properties where the wiring is 40 or more years old, or where an EICR has returned multiple C1 or C2 codes across several circuits.
- All circuits replaced
- New consumer unit included
- Best long-term solution
- Single certificate covers all work
Partial Rewire
Specific circuits replaced where they've failed testing or been damaged. Suitable where the majority of the installation is sound but isolated sections need updating.
- Targeted replacement only
- Less disruption than a full rewire
- Lower upfront cost
- Certificate for completed circuits
In some cases a partial rewire only delays the inevitable. If a property has rubber-insulated wiring or fabric-sleeved cables, we'll tell you honestly whether a partial job makes sense or whether you'd be better going the whole way. There's no upselling here, just the facts.
How long does a rewire take?
Timescales vary depending on the size of the property and the condition of what's already there. Below are typical durations for a full rewire in Cardiff:
These timescales cover the electrical work. If your job requires replastering after chasing cables, you'll need to factor in extra time for a plasterer to follow us through. We can recommend local tradespeople in Cardiff if needed.
Do I need to move out during a rewire?
The honest answer: most people stay put, but expect some disruption. You'll be without power to parts of the house while circuits are being worked on, and there will be days when we're chasing walls or lifting floorboards. It's dusty, noisy work.
For larger properties, particularly where work is happening across multiple floors simultaneously, staying elsewhere for the first couple of days can make life easier. We'll work around you as much as we can and restore power to key areas at the end of each day where possible.
Rewiring costs in Cardiff
Rewiring costs vary depending on the size of the property, the number of circuits, access conditions and whether any additional work is needed (new consumer unit, outdoor circuits, EV charger point, etc). We don't publish fixed prices because no two jobs are the same.
What we do offer is a free survey and written quote. No call-out fee. You'll know the full price before any work starts, and there are no day-rate surprises.
NAPIT notification and your Electrical Installation Certificate
A house rewire is notifiable work under Part P of the Building Regulations. As a NAPIT-registered contractor, we handle the notification to your local authority on your behalf. You don't need to do anything separately.
On completion, you receive an Electrical Installation Certificate (EIC) which confirms the work was carried out to BS7671. Keep this with your property deeds. You'll need it when you sell the house, and your buildings insurer may ask for it.
We also carry out a full inspection and test of the completed installation before issuing the certificate. This isn't a formality. It's a thorough test of every circuit.
Rewiring questions we get asked a lot
Does a rewire add value to my Cardiff property?
It won't add value in the way a kitchen extension would, but failing electrics actively reduce a property's value and can kill a sale. A rewire removes that liability and gives buyers confidence. It also means your EICR will come back satisfactory for the next 10 or more years.
Will my walls need replastering after a rewire?
In most cases, yes. Cables run in walls require chasing, and while we keep this as neat as possible, you'll typically need a decorator or plasterer to make good after we're done. We work tidily and protect your floors and furniture throughout.
My property failed its EICR. Does that mean I need a rewire?
Not necessarily. An unsatisfactory EICR doesn't automatically mean a full rewire. It depends on the codes recorded and how many circuits are affected. We offer free follow-up surveys after a failed EICR and will tell you clearly what the options are. See our EICR testing page for more detail.
Can I get a quote without committing to anything?
Yes. We offer a free no-obligation survey. We'll come and look at the property, talk through what's needed and give you a written price. If you decide to go elsewhere, that's fine. No pressure.
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Areas we cover
Based in Cardiff CF3. Covering Cardiff and South East Wales.
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