Fuse Box Replacement Cost
£500–£1,500for a three-bedroom semi-detached house, excluding VAT. Last updated October 2026.
Which? puts supply and fit of a new fuse box for a standard three-bedroom semi-detached house at £500 to £1,500, including labour and materials and excluding VAT. Every job is priced on survey. Electricians who do consumer unit replacements
What each option costs
| Type | Typical cost | Notes |
|---|---|---|
| New fuse box | £500–£1,500 | Standard three-bedroom semi-detached house. Supply and fit. Labour and materials, excluding VAT. Which? survey of 19 Trusted Traders, November 2025. Likely to be at the upper end in London or the South East. |
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? How long a replacement takes depends on the circuit count, the existing installation and access.
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
