Compare consumer unit replacement costs by property size →
What affects the cost?
Consumer-unit cost is driven mainly by circuit count, board configuration and defects found in the existing installation. Current Checkatrade guidance gives about £485 for a populated 10-way RCBO consumer unit including installation, with smaller six-circuit homes starting around £350 and larger 12-plus-circuit homes reaching about £800. Electrical inspection, remedial faults and relocation should be checked as separate line items.
- Number of circuits
- RCBO, MCB/RCD or other configuration
- Condition of existing wiring
- Electrical inspection and testing
- Meter tails, bonding and remedial faults
- Moving the consumer unit
- Property size and regional labour
Typical cost breakdown
Regional planning examples
The examples below apply our published modelling factor to the same national benchmark. They are not claimed as observed city-wide average quotes.
Consumer unit replacement costs by location
Open a detailed city page to see the same national benchmark adjusted through the transparent regional model, with local planning considerations and worked examples.
Sources used for this guide
Consumer Unit Replacement Cost Guide
Published / checked: Cost table updated June 2026
Used for: Consumer unit supply, installation, inspection and common complete replacement benchmarks
Frequently asked questions
How much does it cost to replace a consumer unit in 2026?
A current typical benchmark is about £485 for a populated 10-way RCBO consumer unit including installation. Straightforward projects often sit around £350–£800 depending on circuit count.
How much is a consumer unit for a semi-detached house?
Current property-size examples put a semi-detached home around £550 supplied and installed when the existing wiring is in good condition and no relocation is required.
Does the consumer unit price include an electrical inspection?
Do not assume it does. Checkatrade lists an electrical inspection around £210 as a separate benchmark, so the quote should say whether testing is included.
Can an old fuse box simply be replaced if wiring faults are found?
Defects identified during testing may need remedial work before the new consumer unit can be certified. This is one reason quotes can exceed the headline replacement benchmark.
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