Consumer Unit Upgrade Cost
£350–£800typical UK range. Last updated August 2026.
Consumer unit replacement typically ranges from £350 for a small home to £800 for a larger home; a populated ten-way RCBO unit averages about £485 installed. Electricians who do consumer unit replacements
What each option costs
| Type | Typical cost | Notes |
|---|---|---|
| Smaller home, about 6 circuits | £350 | Typical starting cost |
| 10-way RCBO consumer unit | £485 | Typical supply-and-install benchmark |
| Semi-detached home | £550 | Typical property-size benchmark |
| Larger home, 12 or more circuits | £800 | Typical upper benchmark |
What affects the price
- Circuit count and protective-device type
- Existing wiring defects
- Board relocation or incoming-equipment work
- Property size, access, and region
What’s included
- Removal of the old board and installation of a suitable consumer unit
- Testing, commissioning, certification, and applicable notification
Good to know
How long does it take? A standard replacement commonly takes four to seven hours; complex installations can take a full day.
Do I need one? Replacement should follow an electrician's assessment of the board and installation, not age or enclosure material alone.
Before you book, read how to check an electrician is qualified.
How to pay less
- Compare the same circuit count and specification
- Confirm testing, certification, notification, and removal
- Resolve known wiring defects before final quotes
