Consumer unit replacement cost in London (2026)
Prices reviewed November 2026
The typical price in London is £450 to £800 (consumer unit replacement, flat). A new consumer unit is a half-day job, and the price depends on the number of circuits and any problems found when it is tested.
💷 Typical consumer unit replacement prices in London
| Consumer unit replacement, flat | £450 to £800 |
| Consumer unit replacement, house | £550 to £1,000 |
What changes the price
- The number of circuits to connect.
- The type of consumer unit and its protection devices.
- Where the unit is and how easy it is to reach.
- Faults found on circuits during testing.
- The certificate and paperwork at the end.
How long it takes
Replacing a fuse box usually takes half a day to a full day. The power is off for most of that time.
How to pay less
- Ask for the make and type of unit in the quote.
- Have an inspection first if you are unsure whether you need one.
- Do any other electrical work at the same time to save on call-out.
Before you hire
- Ask for a competent person scheme registration and an Electrical Installation Certificate when the work ends.
- Ask whether the quote includes an inspection and test of the existing circuits.
- Ask which type of consumer unit and surge protection they will fit.
- Ask how long the power will be off, and plan for fridges and work from home.
💬 Questions about consumer unit replacement costs
Why replace my fuse box?
Older units may lack modern safety protection. A new consumer unit with RCDs can help protect against shocks and electrical fires.
Does it need a certificate?
Yes. Replacing a consumer unit is notifiable under Part P of the Building Regulations in England. Ask for the certificate when the job is done.
How long does it take in London?
Usually half a day to a day. The power is off for part of that time, so plan around it.
Will the power be off for long?
For most homes the power is off for several hours while the unit is swapped. The electrician will plan this with you.
Get consumer unit replacement quotes
Use these figures to plan your budget, then compare written quotes for the same work. Your price depends on the job, the size of your home and how soon you need it. Tell us what you need to request up to 3 local quotes; responses depend on availability.
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