House Rewires Cardiff
Complete & Partial Rewiring Across Cardiff & South Wales — From £3,000
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A house rewire involves removing all existing electrical wiring and replacing it with a completely new system that meets current BS 7671 wiring regulations. This includes new consumer units, cables, sockets, switches, lighting circuits, and protective devices throughout the entire property.
What Is a House Rewire and Who Needs One?
A house rewire involves removing all existing electrical wiring and replacing it with a completely new system that meets current BS 7671 wiring regulations. This includes new consumer units, cables, sockets, switches, lighting circuits, and protective devices throughout the entire property.
House rewires are essential for properties with wiring that is 25 years or older, homes with rubber or lead-sheathed cables, properties undergoing major renovations, and any home where the electrical system shows signs of deterioration. In Cardiff, many Victorian and Edwardian terraces, 1950s–1970s semi-detached homes, and older new-build estates fall into this category.
A full rewire is not just a safety measure — it is a structural investment. Modern electrical demands from EV chargers, heat pumps, home offices, and smart home systems require circuits that older wiring simply cannot support. A properly executed rewire eliminates fire risk from degraded insulation, removes the danger of electric shock from exposed or damaged conductors, and brings the entire installation into full compliance with Part P of the Building Regulations.
At Cardiff Electrical Home Rewire Ltd, we specialise exclusively in domestic rewiring across Cardiff, Llandaff, Penarth, Caerphilly, Barry, and the surrounding areas. Every rewire we complete includes filled chases, data cabling provision, EV charger preparation, and a full EICR certificate on completion.
Searching for a house rewire near me in Cardiff? We are Cardiff's specialist rewiring company, covering every postcode from CF1 to CF24 and all surrounding areas including Whitchurch, Llandaff, Radyr, Penarth, Barry, Caerphilly and Newport. Our dedicated rewiring teams complete projects efficiently with minimal disruption to your family.
Cardiff homeowners choose us for house rewires because we understand local properties. Victorian terraces in Pontcanna, 1930s semis in Whitchurch, post-war estates in Ely and modern new-builds in St Mellons all present different rewiring challenges. Our experience across hundreds of Cardiff rewires means we plan efficiently, work cleanly and deliver certified results every time.
What Cardiff Customers Say
52 reviews
Read on GoogleHelen Trounce
Can't praise enough. Friendly, professional, informative, fantastic service all around.
Ian Thomas
Gareth's service was excellent — he came on time, kept me updated via text of what time to expect him, installed the light fitting with the minimum of fuss and I feel was great value for money. No complaints, will use again.
Business responded
Jess Lloyd
Cardiff Electrical were recommended to me from a friend, and I would now recommend Cardiff Electrical to anyone. Gareth fit me in really quickly for the quote and the works and he was courteous and knowledgeable. Excellent service!
Business responded
Sean O'Neill
Delighted with the work done by Gareth of Cardiff Electrical Home Rewire Ltd, all new kitchen appliances installed along with new outside entrance and back garden lights.
Business responded
Amy West
Gareth from Cardiff Electrical Home Rewire recently completed a full rewire of our house and we couldn't be happier with the service. From start to finish, Gareth was fantastic. His communication was excellent throughout the whole job.
Business responded
Helen Taylor
Recently had a full rewire. Gareth and his team were professional from start to finish and kept you up to date at every opportunity. They tidied up at any given time, along with wearing coverings for their footwear, so much respect for our home.
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Types of Rewiring Services We Offer in Cardiff
Full Rewiring
- Full house rewiring
- Full commercial property rewiring
- Office block rewiring
- Industrial unit rewiring
Partial Rewiring
- Room-by-room rewiring
- Kitchen rewiring
- Bathroom rewiring
- Garage rewiring
- Extension rewiring
Safety & Upgrade Rewiring
- Consumer unit (fuse box) upgrade rewiring
- Earthing & bonding upgrades
- RCD protection upgrades
- Old wiring replacement (rubber / lead / aluminium wiring)
Property-Specific Rewiring
- Rewiring for renovations
- Rewiring for property conversions (HMO / flats)
- Rewiring for extensions & loft conversions
- Rewiring for listed buildings (specialist work)
Smart & Modern Rewiring
- Smart home rewiring
- Home automation wiring
- Data cabling (Cat5e / Cat6 / Cat7)
- EV charger circuit rewiring
- Solar & battery system rewiring
Compliance & Testing Rewiring
- Rewiring for EICR compliance
- Landlord safety rewiring
- Insurance-required rewiring
- Fault finding & corrective rewiring
Emergency Rewiring
- Emergency rewiring repairs
- Fire-damaged wiring replacement
- Flood-damaged electrical rewiring
- Fault-based urgent rewiring
Recent House Rewires Cardiff Projects in Cardiff
What Happens If You Delay House Rewires Cardiff?
Ignoring electrical issues is one of the most common — and dangerous — decisions property owners make. Here's what you risk by waiting.
Electrical Fire Risk
Degraded cable insulation can arc and ignite surrounding materials. Older rubber and lead cables become brittle over time, creating hotspots that are invisible behind walls until it is too late.
Electric Shock Hazard
Exposed or damaged conductors behind walls and under floors create a constant risk of electric shock, particularly in kitchens, bathrooms, and anywhere moisture is present.
Insurance Complications
Many home insurance providers will not cover electrical damage or fire claims if the wiring has not been inspected or updated within the recommended timeframe. A failed EICR can void existing policies.
Failed Property Sales
Buyer surveys routinely flag old wiring. Properties with outdated electrical systems face price reductions of £5,000–£15,000 or fail to sell entirely until remedial work is completed.
Overloaded Circuits
Older wiring was designed for a fraction of modern electrical demand. Running high-draw appliances on undersized circuits causes overheating, nuisance tripping, and accelerated cable degradation.
Non-Compliance Penalties
Electrical installations that do not meet current BS 7671 standards can result in enforcement notices from local authorities, particularly during renovations or property conversions.
Our House Rewires Cardiff Work
Real photos from completed projects across Cardiff and South Wales. NICEIC Approved quality you can see.
Get a Free House Rewires Cardiff Quote in Cardiff
Tell us a few details and we will get back to you within 2 hours with a no-obligation estimate. Most jobs can be assessed over the phone or with a quick site visit.
Our 4-Step House Rewires Cardiff Process
Free Survey
We visit your property, assess the existing wiring, and provide a transparent itemised quote.
Preparation
We protect floors and furniture, plan cable routes, and schedule work to minimise disruption.
Installation
New cables are run, sockets and switches fitted, and the consumer unit upgraded if needed.
Testing & Certification
Full testing, EIC certificate issued, and all waste removed before handover.
The Advantages of Professional House Rewires Cardiff in Cardiff
25+ Year System Life
Modern Twin & Earth and LSOH cables are rated for decades of reliable performance, eliminating recurring repair costs.
Fire Risk Eliminated
New cabling with intact insulation, proper earthing, and RCD/RCBO protection removes the primary causes of electrical fires.
EV & Smart-Home Ready
Every rewire includes dedicated circuits and infrastructure for EV charging, data cabling, and future smart home integration.
Increased Property Value
A fully rewired property with certification is significantly more attractive to buyers and consistently achieves higher sale prices.
Lower Energy Bills
Modern LED lighting circuits and properly rated cables reduce energy waste from resistance losses and inefficient legacy systems.
Full Compliance & Certification
You receive a BS 7671 Electrical Installation Certificate, Part P building regulation sign-off, and a clean EICR — essential for insurance, sales, and letting.
House Rewires Cardiff — In-Depth Technical Guide for Cardiff Properties
Cable Types and Standards
All house rewires use Twin & Earth (T&E) PVC-insulated cables as the primary wiring method, typically 2.5mm² for ring finals (sockets) and 1.5mm² for lighting circuits. Higher-rated circuits for cookers, showers, and EV chargers use 6mm² or 10mm² cables. In properties where cables pass through thermal insulation, we use Low Smoke Zero Halogen (LSOH) alternatives that meet the latest fire safety requirements. All cables are run in compliance with BS 7671 18th Edition Amendment 2, with correct derating factors applied where cables are bunched or enclosed.
Consumer Unit Specifications
Every rewire includes a new metal-clad consumer unit compliant with BS EN 61439-3 and Regulation 421.1.201. We install either split-load boards with dual 63A RCDs covering separate circuits, or full RCBO boards where each circuit has its own combined overcurrent and residual current protection. RCBO boards provide superior fault discrimination — a trip on one circuit will not affect any other, which is particularly beneficial for properties with home offices, medical equipment, or server infrastructure.
Chases and Making Good
Unlike many electricians who leave open chases for a separate plasterer, we include chase filling as standard on every rewire. Chases are cut to the correct depth using diamond-bladed chasers with dust extraction, cables are clipped and secured, and chases are filled flush with bonding coat and finish plaster. This saves you the cost and delay of arranging a separate plasterer and means your walls are ready for decoration as soon as the second fix is complete.
Data Cabling and Future-Proofing
Modern homes require more than just power. We include Cat6 data cabling provision as standard, with cables run to key locations — living room, home office, and main bedroom — during the first fix. This allows for hardwired internet connections that are faster and more reliable than Wi-Fi. We also install dedicated 32A radial circuits for EV chargers and run cable routes for future solar PV connections where requested.
Rewiring Occupied Properties
We understand that most families cannot move out during a rewire. Our process is designed to minimise disruption — we work room by room, maintain power to essential circuits throughout each working day, and ensure the property is safe and functional at the end of every shift. Dust sheets, shoe covers, and daily cleanup are standard practice, not optional extras.
Cardiff Property Types We Specialise In
Cardiff has a diverse housing stock, and each property type presents different rewiring challenges. Victorian and Edwardian terraces in Pontcanna and Canton often have solid walls requiring surface-mounted trunking or carefully planned chase routes. 1930s semi-detached homes in Llandaff and Whitchurch typically have cavity walls that allow easier cable runs. Post-war properties in Ely and Fairwater may have aluminium wiring or early PVC cables that are now beyond their safe service life. We have completed hundreds of rewires across all these property types and understand the specific requirements of each.
Common House Rewires Cardiff Questions
A standard 3-bedroom house rewire typically costs between £3,000 and £6,500. The exact price depends on property size, age, accessibility, and whether plaster needs replacing after chasing. We provide free, itemised quotes with no hidden costs.
Still have questions about House Rewires Cardiff?
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Cardiff Electrical Home Rewire Ltd — your trusted Electrician in Cardiff since 2004. NICEIC Approved, BS 7671 certified, 6-year warranty on all work.
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House Rewires Cardiff Available Across South Wales
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Book a no-obligation survey and receive a detailed, fixed-price rewire quote within 48 hours. Covering all Cardiff postcodes and South Wales.