Consumer unit upgrade cost in Cardiff
How much a consumer unit upgrade really costs in Cardiff. Fixed-price 2026 figures with no per-circuit surcharges.
Cost guide: what is involved, what it depends on, and what we would check first at a CF10–CF24 address. Consumer unit pricing varies more than most people expect, mainly because the board itself is only a fraction of the job. Every property we attend in and around Cardiff gets the same order of operations, and it starts with establishing quick check of the existing board, tails and earthing. That is the honest version, rather than the version that sells more work. The paperwork for cost guide is only useful if it reflects what is actually installed, which is why circuits get identified rather than assumed. It is the difference between a fixed price and an estimate. What follows is what we actually do about cost guide in Cardiff, rather than a general description of the trade.
- For Victorian and Edwardian terraces across Cathays and Roath especially — standard 10-way RCD board: from £650 fitted
- All-RCBO 14-way board: from £900 fitted That detail is easy to verify.
- Standard 10-way RCD board, especially on circuits that were extended rather than replaced.
- All-RCBO 14-way board explains more callouts around CF10–CF24 than anything exotic.
- Not glamorous, but common: earth rod / TT install add-on if needed.
What's different about Cardiff
For Victorian and Edwardian terraces across Cathays and Roath especially — rCBO-per-circuit (rather than two big RCDs) is now the default spec we recommend for CF10–CF24 addresses with multiple lighting and socket circuits.
Most Cardiff homes don't need a new earthing arrangement — but where many older Cardiff properties still run on rewireable BS 3036 fuse boxes that no longer meet 18th Edition requirements, we'd quote for that on the survey rather than surprise you later. That detail is easy to verify.
SPD surge protection optional add-on, which testing separates from the other candidates rather than guesswork.
Part P notification always included is the finding we would check first on a Cardiff property.
How we'd do it
- 1SurveyQuick check of the existing board, tails and earthing — done in front of you if you want to watch.
- 2CertifyBS 7671 cert and Part P notification. That detail is easy to verify.
- 3Fixed quoteSingle-day swap, typically 4–6 hours. That covers the part most people are unsure about.
- 4InstallCommon around CF10–CF24 — single-day swap, typically 4–6 hours.
Common questions
Why is RCBO more expensive?
More individual devices, but a single fault only trips one circuit — worth it on most modern homes.
Will the power be off for long?
Only for the parts that require isolation. We plan the sequence so the Cardiff property is not dead all day.
Will you work on a tenanted property?
Yes. We arrange access with the tenant directly if you prefer, and the report goes to you as the Cardiff landlord.
What if you find something unrelated?
It gets reported, not quietly fixed. You decide whether it is dealt with now or later.
Do you cover Cardiff for cost guide?
Where it applies: 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.
What is the most common outcome?
A defined, limited piece of work. All-RCBO 14-way board usually resolves without replacing the whole installation.
You get one price, one electrician and one point of contact from first call to certificate. We cover Cardiff and the CF10–CF24 postcodes, including Pontypridd, for cost guide. If a survey is the sensible first step, we will say so and price it separately so you are not paying twice. We cover Cardiff and the CF10–CF24 postcodes, including Penarth, for cost guide.