New consumer unit (fuse box) cost (UK, 2026)
£450 to £950
supplied and fitted, typical UK range, 2026
Replacing an old fuse box with a modern consumer unit with RCD protection typically costs £450 to £950 supplied, fitted and certified.
It is notifiable work: the price should include testing every circuit and the certificate. That is where the hours go, and it is the part that protects you.
These are honest typical ranges, not promises: your job, your area and access all move the number. Use them to sanity-check quotes, then get itemised ones.
What moves the price
- Number of circuits in your home
- Condition of existing wiring (faults found during testing must be fixed)
- Region
A fair quote includes
- Full testing of every circuit before and after
- An Electrical Installation Certificate
- Building regulations notification
- Labelling of every circuit in the new unit
Ask these before you say yes
- 1.Is full circuit testing and the certificate included in this price?
- 2.What happens on price if testing finds a wiring fault?
- 3.How long will the power be off?
Worth a second look if
- A price that looks £200 cheaper because testing and certification are quietly excluded
- No mention of building regs notification
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