Costs & Pricing
How Much Does It Cost to Replace a Fuse Box in the UK?
Replacing a fuse box in the UK typically costs £450–£900. Here is what is included and why quotes differ.
By Steels Electrical · 4 June 2026 · 4 min read
The short answer
Replacing a fuse box (consumer unit) in the UK typically costs £450–£900, including a modern board with RCD/RCBO protection, full testing and certification. Prices rise if existing circuits need remedial work before the new board can be certified, or if earthing and bonding need upgrading to current standards.
Upgrading from an old fuse box to a modern consumer unit is one of the best safety improvements you can make to a home. Modern boards trip far faster in a fault and add RCD protection that older boards lack.
What the price includes
A proper consumer-unit change is not just the box. It includes testing every existing circuit, fitting the new board with the right protection, labelling, and issuing an Electrical Installation Certificate. If a circuit fails its test, that has to be fixed before the new board can be signed off — which is the usual reason one quote is higher than another.
Frequently asked questions
- Why are some quotes much cheaper?
- Usually because they assume every existing circuit is sound and exclude any remedial work or earthing upgrade. Always check what is included so you are comparing like for like.
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