Consumer Units
Consumer unit replacement costs between £595 and £895 for most homes, depending on the board size, brand, and any remedial work identified during the job. That price covers supply and fit of a new RCBO consumer unit, an Electrical Installation Certificate, and NAPIT building regulations notification.
| Board | Type | Best For | Installed Price |
|---|---|---|---|
| British General Fortress | RCBO (entry) | Standard homes up to 12 circuits | From £595 |
| FuseBox F100 | RCBO (standard) | Homes up to 16 circuits | From £695 |
| Hager VML | RCBO (premium) | Large homes, commercial | From £795 |
All prices include: supply and installation of new board, all circuit testing, EIC, and NAPIT Part P notification. Does not include remedial work on circuits found defective during testing.
An older split-load board uses two RCDs to protect groups of circuits. If one RCD trips, half your house loses power. An RCBO board gives every circuit its own individual RCBO — if a circuit trips, only that circuit loses power. Everything else stays on.
RCBO boards cost slightly more but are significantly safer and less disruptive. We only install RCBO boards as standard. Any installer still fitting split-load RCD boards in 2026 is behind the curve.
The supply is isolated, the old board is removed, the new board is fitted and all circuits reconnected and tested individually. A full EIC is issued and the work is notified to your local authority via NAPIT. The job typically takes 4–6 hours for a standard domestic board.
AFTA Electrical covers Essex, Suffolk, Norfolk, Cambridgeshire, and Hertfordshire. NAPIT & TrustMark registered.
Most homes pay £595–£895 for a new RCBO consumer unit fully installed including the Electrical Installation Certificate and NAPIT Part P building regulations notification.
A standard domestic board replacement takes 4–6 hours. The supply is isolated for most of that time, so plan for a half to full day without power.
An RCBO board gives every circuit its own individual protection device. If one circuit trips, only that circuit loses power — not half the house. It's the current best practice and what all reputable electricians now specify.
Yes. Consumer unit replacement is notifiable under Part P of the Building Regulations. Your electrician must be NAPIT or NICEIC registered to self-certify the work. Always ask for your NAPIT completion certificate.
Related: View Service Page · View Pricing · Get a Free Quote