Consumer Unit Replacement Cost in Cardiff: 2026 Full Pricing Guide — RCBO Boards & BS 7671:2018+A4:2026

These are working prices for Cardiff based on competent-person scheme members in the area, current copper / steel pricing, and typical labour. Each scenario assumes a same-day swap with no unexpected remedial work.

A compliant consumer unit replacement in Cardiff should include all of the following — anything missing should be flagged in the quote:

Beyond the board itself, six factors push the final Cardiff price into the upper band:

1. Tails upgrade — if existing tails are < 25mm² or in poor condition, they must be replaced and coordinated with the DNO National Grid Electricity Distribution (NGED).
2. Meter position move — relocating the meter (rare but sometimes needed for board access) is a DNO job, charged separately.
3. Bonding upgrades — if main bonding to gas, water or oil is undersized or missing, it must be brought up to current BS 7671 requirements.
4. AFDDs — required on socket circuits in HMOs and similar premises under Reg 421.1.7 (since A2:2022). Each AFDD-protected way adds to the cost.
5. Three-phase supply — a three-phase board, RCBOs, and testing equipment cost significantly more.
6. Inaccessible board position — boards behind stairs, in lofts, or under stairs add labour time for access.

You should consider replacing your consumer unit if any of the following apply:

If you are quoting consumer unit replacements in Cardiff, the £459–720 band above is your fair-margin floor for a 10–14 way RCBO board with SPD, EIC and labour. Quoting below this band means you are absorbing the cost of your scheme fee, professional indemnity, calibrated test kit, and the certificate liability you sign. Use the bands as anchors, then adjust for: tails upgrade, bonding remedials, AFDDs (required in HMOs and similar premises, recommended elsewhere), and any DNO coordination through National Grid Electricity Distribution (NGED).

For a deeper pricing methodology — fixed vs hourly, defending the price against haggling, when to walk away from a job — read the full trade guide: How to Price Consumer Unit Replacement as an Electrician.

For a fair quote, contact at least three scheme-registered electricians (NICEIC, NAPIT, ELECSA or Stroma). Provide a clear brief: number of circuits, current board type, intended use of the property (private home, let, HMO), and any planned additional loads. Elec-Mate matches you to vetted Cardiff electricians and returns same-day quotes for most domestic jobs.

Once the work is complete, demand the BS 7671:2018+A4:2026 Electrical Installation Certificate, Schedule of Test Results, and the Part P notification letter / certificate from the competent-person scheme. Keep these documents — they are the legal record of compliance and the buyer or insurer will ask for them later.