How Much Does It Cost to Replace a Consumer Unit?
£400 – £900
supply and fit
Consumer unit replacement costs between £400 and £900 supply and fit, depending on the number of circuits, the type of protective devices fitted, and any remedial work identified during installation. Modern consumer units must use RCBOs or dual RCDs to comply with current wiring regulations, offering better protection than older fuse boards.
Average cost
£400 – £900
supply and fit
Prices vary by region, property type and tradesperson. Always get at least two quotes.
What affects the price?
Consumer unit specification - a standard dual-RCD unit costs £80-£150; a fully RCBO-protected unit costs £200-£350 for the board alone
Number of circuits - more circuits mean more protective devices and longer installation time
Condition of existing wiring - if an EICR reveals remedial work is needed on circuits, this adds cost before the new board can be certified
Metal vs plastic enclosure - current regulations require metal consumer unit enclosures for fire safety in domestic properties
Labour vs materials
Consumer unit replacement typically takes four to six hours for a standard installation. Labour accounts for roughly 50-60% of the total cost; the board and protective devices make up the rest.
Repair or replace?
If an EICR reveals the existing consumer unit has insufficient protection such as no RCD protection, a replacement is required rather than repair. Patching an old unit with modern devices is rarely cost-effective.
Questions to ask your tradesperson
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