Complete House Rewire
Services in Cardiff

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.

• Full replacement of all circuits, cables, sockets and switches
• New 18th Edition consumer unit with dual RCD or RCBO protection
• Chases cut, cabled, and filled — ready for decoration
• Data cabling and EV charger circuit provision included
• Full EICR and BS 7671 compliance certificate on completion
• Minimal disruption — most rewires completed within 5–7 working days

Survey & Quote

We visit your property, inspect the existing installation, assess your requirements, and provide a detailed fixed-price quote with no hidden costs.

Circuit Design

We design a bespoke circuit layout tailored to your property and lifestyle — including future provisions for EV chargers, data, and additional circuits.

First Fix

All old wiring is removed. New cables are run through walls, floors, and ceilings. Chases are cut, cabled, and prepared for plastering.

Second Fix

Sockets, switches, lighting, consumer unit, and all accessories are installed. Chases are filled and left flush, ready for decoration.

Test & Certify

Every circuit is tested to BS 7671 standards. You receive a full Electrical Installation Certificate (EIC) and EICR on completion.

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.

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