House rewire cost in Cardiff
What a full rewire really costs in Cardiff in 2026 — by bed count, by property age, and what changes the price.
We are asked about in Cardiff most weeks, usually after something has changed at the property. A "typical" rewire price is one of the least useful figures in the trade because the right price depends entirely on what's behind the plaster. Photographs of anything hidden are taken as standard, because you should not have to take our word for what is above the ceiling. Which is why the schedule of results is worth reading, not filing. If you have had conflicting advice, it is usually because someone quoted without checking 2-bed terrace. Two electricians looking at the same readings tend to agree. It takes minutes to confirm and saves hours later. If a previous certificate exists, cost guide usually starts by checking whether it still reflects reality.
- 3-bed semi: £6,000–£8,000 Simple to check, easy to miss.
- Worth planning for: 4-bed detached: £8,000–£11,000
- Where 2-bed terrace shows up, we test the neighbouring circuits too.
- 3-bed semi: £6,000–£8,000 — worth ruling in or out before anything is replaced.
- 4-bed detached, which explains why the problem comes and goes rather than staying put.
What's different about Cardiff
Many older Cardiff properties still run on rewireable BS 3036 fuse boxes that no longer meet 18th Edition requirements, which is exactly the situation a full rewire was designed for. Simple to check, easy to miss.
Worth planning for: solid stone walls — common in older Cardiff properties — slow first-fix down because cable chasing takes longer. We factor that into the quote up front.
Includes BS 7671 certification and Part P — one of several possibilities, all of which get checked.
Excludes plastering and decoration — often visible once the accessory is taken off the wall.
How we'd do it
- 1SurveyFree on-site walk-through and circuit count forms part of the fixed price, along with the certificate.
- 2QuoteWorth planning for: fixed written price, broken down room-by-room.
- 3First fixCables and back-boxes installed before plastering, with the old parts left for you to see.
- 4Second fixSockets, switches, lighting and certification.
Common questions
How long does a Cardiff rewire take?
Typically 5–10 working days for a 3-bed house depending on access.
Do you charge to come out and look?
Attendance and testing are quoted before we travel to Cardiff, so there is nothing added afterwards that was not agreed.
Is a specialist needed or will any electrician do?
The work must be done by someone competent and registered. That is what the certification depends on.
Do you work weekends?
Sometimes, where a property in Cardiff cannot be accessed midweek. It is arranged case by case.
Do you cover Cardiff for cost guide?
Yes — Cardiff and the surrounding CF10–CF24 postcodes are part of our regular working area, including Penarth and Caerphilly, and Cardiff Council notification is handled by us where the work requires it. This is the part people ask about most.
Is older wiring automatically a problem?
No. Plenty of older Cardiff installations test well. Age is a reason to check, not a verdict.
Describe what the property is doing and when it started. We will tell you whether it is urgent or plannable. We cover Cardiff and the CF10–CF24 postcodes, including Penarth, for cost guide. A five-minute call usually establishes the scope. If the answer is that you do not need us yet, that is what you will hear. We cover Cardiff and the CF10–CF24 postcodes, including Caerphilly, for cost guide.