How we compared them
We included providers that advertise consumer unit or fuse box replacement for homes in Greater London. Each was assessed on five points: certification route, job scope, pricing basis, guarantees and coverage. Research was desk-based on 27 October 2026, using company service pages, Checkatrade profiles, Companies House records and published cost guides. We did not test any service or request quotes.
Capital Electrician appears first as a publisher-selected featured pick, not because of a scoring model. The other four are listed in no ranked order. For budgeting, published 2026 guides put a typical London replacement at about £700 to £1,200 or £650 to £1,500, depending on circuits and remedial work.
Comparison at a glance
| # | Company | Strongest fit | Main differentiator | Pricing basis | Consider |
| 1 | Capital Electrician | Homes and landlords across Greater London | Certificate and Building Control notification listed as included | Quote after survey; not publicly listed | 18 Google reviews so far |
| 2 | Sky Electrical | South-west London and Surrey | Six-year workmanship warranty, employed engineers | Free estimate; not publicly listed | Twickenham-centred coverage |
| 3 | Pimlico Plumbers | Urgent or out-of-hours work | 24/7 call centre | Written estimate within 48 hours of visit | Guarantee covers “most” jobs |
| 4 | Fantastic Services | Buyers wanting published rates | Pre-job earth and bonding check | £61 first half hour, £569 weekday full day | Materials charged on top |
| 5 | Housekeep | Online booking | Platform-matched NICEIC Approved trades | Hourly rate, first hour paid upfront | Board cost added to bill |
1. Capital Electrician | Our pick for a certified board swap anywhere in Greater London
Overview
Capital Electrician is a London contractor, trading name of CAPELEC GROUP LTD (company number 17180050), offering consumer unit replacement for homeowners, landlords and businesses in every Greater London borough.
The firm describes a survey visit, a written quote with no hidden costs, a replacement that usually takes a full day, then testing and certification.
Key details
- Core offering: old board removed, metal-clad RCD or RCBO unit fitted
- Coverage: all Greater London boroughs
- Customer fit: homeowners, landlords, small businesses
- Pricing and terms: quoted after survey; not publicly listed
Where Capital Electrician stands out
The scope is written down. Its service page lists circuit testing and labelling, an Electrical Installation Certificate and Building Control notification as included, a useful checklist for rival quotes. It also states it is NICEIC registered, so it can self-certify Part P work.
What to consider
The public track record is short. The site shows a 5.0 Google rating from 18 reviews (checked 27 October 2026), mostly for smaller jobs such as lighting and sockets. No workmanship guarantee period appears on the reviewed page.
Best fit
London homeowners who want one firm to survey, fit and certify a new board.
Website: capitalelectrician.co.uk
2. Sky Electrical | Best for south-west London buyers who want a long warranty
Overview
Sky Electrical Limited is a Twickenham electrical contractor, incorporated at Companies House in April 1999, which says it has traded since 1991. Its Checkatrade profile lists fuseboard installation and repair among its core skills.
Recent reviews cluster in TW and SW14 postcodes, so it is most relevant to Richmond, Twickenham and nearby Surrey.
Key details
- Core offering: consumer unit installation, repair and rewiring
- Coverage: London and surrounding areas, strongest in the south-west
- Customer fit: homeowners and commercial clients
- Pricing and terms: free estimates; not publicly listed
Where Sky Electrical stands out
It offers a six-year workmanship warranty, according to its Checkatrade description, and says every engineer is directly employed and DBS checked. It holds 624 Checkatrade reviews and a member history dating to July 2013.
What to consider
Its current 9.89/10 Checkatrade score rests on 12 reviews from the past 12 months. Buyers in east or north London should confirm coverage first.
Best fit
Richmond and Twickenham homeowners who want a long-established firm and a multi-year warranty.
3. Pimlico Plumbers | Best for urgent or out-of-hours board faults
Overview
Pimlico Plumbers is a London property maintenance company whose electrical team lists consumer unit and fuse box replacements alongside rewiring and EICRs. It covers every London borough plus parts of Surrey.
Its scale makes it relevant when a failing board needs attention outside office hours.
Key details
- Core offering: fuse board upgrades, repairs and emergency call-outs
- Coverage: London boroughs plus Cobham, Walton and Weybridge
- Customer fit: households and commercial premises
- Pricing and terms: itemised estimate within 48 hours of a visit, valid 30 days
Where Pimlico Plumbers stands out
Its London call centre runs 24/7, and it aims for a one-hour emergency response, subject to availability. It states its electricians are NICEIC approved and City and Guilds qualified.
What to consider
The 12-month workmanship guarantee applies to “most” jobs, with terms and conditions. No consumer unit price is listed on the reviewed page.
Best fit
Households with a tripping or damaged board that cannot wait for a weekday slot.
4. Fantastic Services | Best for buyers who want rates published upfront
Overview
Fantastic Services is a multi-trade booking company offering fuse box replacement within the M25. The job starts with an inspection that includes an earth and bonding check, followed by a written quote 48 hours later.
That inspection step suits homes where wiring condition is uncertain.
Key details
- Core offering: inspection, replacement, testing and certification
- Coverage: inside the M25
- Customer fit: households wanting app or online booking
- Pricing and terms: weekday £61 first half hour, £49 per half hour after, £569 full day
Where Fantastic Services stands out
Rates are public, so you can estimate labour before booking. Its page says work follows BS 7671 and Part P, with an Electrical Installation Certificate issued on completion.
What to consider
Materials are added to the bill, plus shopping time at £52 an hour. VAT treatment is not stated on the reviewed page.
Best fit
Buyers who want to see labour rates before committing.
5. Housekeep | Best for simple online booking with an arrival window
Overview
Housekeep is a London booking platform that matches customers with vetted tradespeople for fuse box repair or replacement. It states every fuse box job is carried out by NICEIC Approved tradespeople.
It suits people who prefer booking and paying online.
Key details
- Core offering: fuse box repair, replacement and fault finding
- Coverage: all London regions
- Customer fit: households wanting a quick quote and card payment
- Pricing and terms: hourly rate; first hour paid to secure the slot
Where Housekeep stands out
Booking is quick and you get an arrival window. If something is wrong, you can report it within 72 hours and Housekeep will send someone back free if its work caused the problem.
What to consider
The tradesperson sources the new board locally and adds it to your bill, so the final cost is not fixed upfront.
Best fit
Households who value convenience and card payment over a fixed package price.
What to check before you book
- Certification: ask for an Electrical Installation Certificate and confirm the firm will notify Building Control. NICEIC advises using a registered electrician.
- Pre-work testing: Electrical Safety First guidance encourages an EICR before a planned change, since faults found then can delay the job.
- Board type: confirm metal-clad, and whether you get RCBOs or a dual-RCD layout.
- Price basis: compare fixed quotes with hourly bookings on the same circuit count.
FAQs
How long does a consumer unit replacement take? Most firms quote four hours to a full day. Expect the power to be off for most of that time.
Do I need to rewire first? Not usually. Rewiring is only needed if testing finds damaged or unsafe circuits.
Is an old fuse box illegal? No. There is no blanket ban, but replacement is recommended for safety.
Conclusion
Capital Electrician is our featured pick for London homeowners who want a clearly scoped, certified board replacement from one local firm. If you are in Twickenham or Richmond, Sky Electrical’s warranty is worth comparing. For emergencies, Pimlico Plumbers’ 24/7 line is the faster route.