Calculate your house rewire cost
House rewire cost by property size in Cardiff
UK £3,000–£4,800£2,750–£4,350
UK £3,800–£5,800£3,450–£5,300
UK £4,450–£8,000£4,050–£7,300
UK £6,080–£9,380£5,550–£8,550
UK £7,500–£12,500£6,850–£11,400
3-bedroom house benchmark
What can change a real Cardiff quote?
- Property size and layout
- Age and condition of existing wiring
- Occupied versus empty property
- Socket, lighting and circuit count
- Standard or premium fittings
- Access beneath floors and within walls
- Making good, flooring and decoration
Local planning considerations
For grants and energy schemes, verify the current Wales-specific eligibility rules before relying on any support assumption.
- Use Wales-specific planning, building-control and energy-scheme information where the rules differ from England.
- Terraced or constrained urban properties can add access, waste and scaffold costs that are not captured by the regional factor.
- Drainage, roof and external-work scopes should be based on the property condition rather than a generic city assumption.
How the regional model works
The 0.91× factor places this planning estimate 9% below the national planning baseline. We keep that modelling assumption separate from the dated national benchmark so users can see which part comes from an external source and which part is UK Home Costs modelling.
Sources
How Much Does It Cost to Rewire a House in the UK?
Published / checked: June 2026
Used for: Full-house rewiring benchmarks by property size
Frequently asked questions
How much does it cost to rewire a house in Cardiff in 2026?
For a 3-bedroom house, the current national range is £4,450–£8,000. Applying the regional model gives about £4,050–£7,300.
How much is a 4-bedroom house rewire in Cardiff?
The current national 4-bedroom range is £6,080–£9,380. The modelled Cardiff range is £5,550–£8,550.
Why is the Cardiff rewire estimate different from the UK benchmark?
The 0.91× regional factor is a transparent planning assumption rather than an observed city-wide electrician price index.
What can make a house rewire more expensive?
Larger layouts, occupied properties, difficult access, premium fittings, more outlets, old wiring condition, remedial work and making good can increase the final quote.