Home → Cost guides → Fuse box replacement cost
Fuse box replacement cost: what it really costs in 2026
Consumer unit upgrades, certified.
£550 – £935
A standard consumer unit replacement starts around £550. RCBO boards run about £770 and surge-protected units £935.
Price by spec
| Option | What it means | Typical price |
|---|---|---|
| Standard unit | Modern RCD protection | £550 |
| RCBO board | Each circuit independent | £770 |
| With surge protection | Protects electronics | £935 |
What actually happens
- Power off and the old unit isolated
- Circuits identified, tested and labelled
- New consumer unit mounted and wired in
- Each circuit tested for faults (this finds surprises)
- Earthing and bonding brought up to standard
- Certified (EIC) and notified to building control
Popular choices
RCBO boards (one trip doesn't kill the house)Integrated surge protectionSpare ways for future EV or garden circuits
Regulations to know
- Notifiable under Part P — a registered electrician must fit and certify it
- Old fuse-wire boards aren't illegal, but insurers and buyers increasingly expect modern RCD protection
- Testing often uncovers pre-existing faults that must legally be put right before energising
Tips from the trade
- RCBOs are worth the difference: a faulty kettle no longer blacks out the freezer
- Budget headroom — the testing stage finds problems the quote couldn't see
Plan this project properly
Get a region-adjusted estimate, track budget against real quotes, and find local tradespeople -- free to browse on Qome.
Start planning on QomePrices on this page are approximate, region-adjusted guide figures built from cross-checked UK cost data. They exist to inform you, not to bind anyone. Actual prices are whatever you and your tradesperson agree, and a difference between a Qome guide figure and a real quote is not a fault in either.