Every company here advertises fuse box or consumer unit replacement for homes in Greater London. We compared them on five points that matter most in older properties: pre-work testing, job scope, certification, pricing basis and guarantees. Research was desk-based on 27 October 2026, using company service pages, Checkatrade, Companies House and published cost guides. We did not book or test any service.
Capital Electrician is placed first as a publisher-selected featured pick. The remaining four are not ranked against each other. Older homes often need remedial work once testing starts, which is why published London price guides range from £650 to £1,500 for the same basic job.
At a glance
| # | Company | Strongest fit | Main differentiator | Pricing basis | Consider |
| 1 | Capital Electrician | Pre-1990s boards anywhere in Greater London | Old board removal, metal-clad unit, EIC and notification listed | Quote after survey; not publicly listed | 18 Google reviews to date |
| 2 | Sky Electrical | Period homes in south-west London | Six-year workmanship warranty | Free estimate; not publicly listed | Coverage centred on Twickenham |
| 3 | Fantastic Services | Homes with unknown earthing | Earth and bonding check before quote | £61 first half hour, £569 weekday day | Materials extra |
| 4 | Pimlico Plumbers | Faulty boards needing fast attention | 24/7 call centre | Estimate within 48 hours of visit | Guarantee on “most” jobs |
| 5 | Housekeep | Simple swaps booked online | NICEIC Approved trades on fuse box jobs | Hourly; first hour upfront | Board added to bill |
1. Capital Electrician | Our pick for replacing an outdated fuse board in Greater London
Overview
Capital Electrician, the trading name of CAPELEC GROUP LTD (company number 17180050), handles consumer unit replacement in every Greater London borough. Its service page names the exact problems older homes have: rewirable or cartridge fuses, no RCD protection and wooden backboards.
The company assesses the installation first, then quotes. Fitting usually takes a full day, it says.
Key details
- Core offering: old fuse board removed, metal-clad RCD or RCBO unit installed
- Coverage: all Greater London boroughs
- Customer fit: owners of older homes, landlords
- Pricing and terms: quoted after a survey; not publicly listed
Where Capital Electrician stands out
It targets the right problem. The listed signs match what most pre-1990s boards show. Every job, it states, ends with full circuit testing, labelling, an Electrical Installation Certificate and Building Control notification under its NICEIC registration.
What to consider
Reviews are few so far: a 5.0 Google rating from 18 reviews, as displayed on its site on 27 October 2026, mostly for smaller jobs. The reviewed page does not state a workmanship guarantee period.
Best fit
Owners of older London homes who want a dated fuse box surveyed, replaced and certified by one firm.
Website: capitalelectrician.co.uk
2. Sky Electrical | Best for south-west London period homes
Sky Electrical Limited is based in Twickenham and was incorporated in 1999, according to Companies House, though it says it has traded since 1991. Fuseboard installation and repair are listed skills on its Checkatrade profile.
Several published reviews describe replacing very old fuse boards and correcting earlier poor work in TW and SW14 postcodes.
Key details
- Core offering: fuseboard replacement, repair and rewiring
- Coverage: London and surrounding areas, focused on the south-west
- Customer fit: homeowners, commercial clients
- Pricing and terms: free estimates; not publicly listed
Where Sky Electrical stands out
It offers a six-year workmanship warranty, per its Checkatrade description, which is longer than the 12 months some larger firms state. It also says all engineers are directly employed, not subcontracted.
What to consider
Its current 9.89/10 Checkatrade score is based on 12 reviews from the past 12 months, out of 624 in total. North and east London buyers should check coverage.
Best fit
Richmond, Twickenham and Kingston homeowners with an old board who want a long warranty.
3. Fantastic Services | Best when earthing condition is unknown
Overview
Fantastic Services is a booking company covering trades inside the M25, including fuse box replacement. Its process begins with an inspection that includes an earth and bonding check.
That first step matters in older homes, where missing earthing can stall a board change on the day.
Key details
- Core offering: inspection, replacement, testing and certification
- Coverage: within the M25
- Customer fit: households comfortable with app or online booking
- Pricing and terms: weekday £61 first half hour, then £49 per half hour; £569 full day
Where Fantastic Services stands out
You get a written quote 48 hours after inspection, including any faults that need fixing first. Its page states that the electrician fixes existing issues before fitting the new unit.
What to consider
Materials are billed on top, with shopping time at £52 an hour. The page does not say whether quoted rates include VAT.
Best fit
Owners of older homes who want problems found and priced before work starts.
4. Pimlico Plumbers | Best when an old board fails unexpectedly
Overview
Pimlico Plumbers is a London maintenance firm whose electrical services include fuse box and consumer unit replacements, rewiring and EICRs. It covers all London boroughs and parts of Surrey.
Old fuse boxes sometimes fail without warning, and Pimlico’s round-the-clock line is built for that situation.
Key details
- Core offering: fuse board upgrades, repairs, emergency call-outs
- Coverage: London boroughs plus Cobham, Walton and Weybridge
- Customer fit: households and businesses
- Pricing and terms: itemised estimate within 48 hours of a visit, valid 30 days
Where Pimlico Plumbers stands out
It runs a 24/7 London call centre and aims to reach emergencies within an hour, subject to availability. It says its electricians are NICEIC approved and work to BS 7671.
What to consider
Its 12-month workmanship guarantee covers “most” jobs, with terms applying. No fixed board price appears on the reviewed page.
Best fit
Households whose old fuse box has failed and who need someone on site quickly.
5. Housekeep | Best for booking a straightforward swap online
Overview
Housekeep is a London platform that books vetted tradespeople for fuse box repair or replacement. It states these jobs go only to NICEIC Approved tradespeople.
You choose a time, pay the first hour and receive an arrival window. It names Wylex and Crabtree among the brands its trades install.
Key details
- Core offering: fuse box replacement, repairs, fault finding
- Coverage: London regions
- Customer fit: households preferring online booking and card payment
- Pricing and terms: hourly rate; first hour paid upfront
Where Housekeep stands out
You can supply your own replacement board if you prefer. Problems reported within 72 hours are fixed free if Housekeep’s work caused them.
What to consider
If the electrician sources the board, its cost is added after approval, so the final price is not fixed in advance.
Best fit
Households wanting a simple swap booked and paid online.
Checklist for older homes
- Ask about testing first. Electrical Safety First guidance encourages an EICR before a planned change.
- Ask what happens if faults appear. Some circuits may need repair before connection.
- Confirm the enclosure. Old wooden or plastic boards should be replaced with a non-combustible unit.
- Get paperwork. You need an Electrical Installation Certificate and Building Control notification.
FAQs
Can I keep my old fuse box? Yes. Old boxes are not banned, though NICEIC recommends upgrading for better protection.
Will a new board trip more often? It can, because RCD protection detects earth leakage that old fuses ignored. That usually points to a fault worth fixing.
Does the whole house need rewiring? Not usually. Rewiring is needed only when testing shows damaged or unsafe cables.
Conclusion
For owners of older London homes, Capital Electrician is our featured pick for a surveyed, fully certified fuse box replacement. Sky Electrical’s warranty appeals in the south-west, and Fantastic Services suits homes where earthing needs checking first.
