24/7 emergency & reactive maintenance · London
Emergency electrician in London
Power gone, circuits repeatedly tripping or a damaged electrical fitting?
Homes, businesses, landlords and managing agents. One number for the fault, the visit and the next repair step.
1-hour arrival aim, subject to availability. Give us your postcode and fault for the available visit time and charge. Call for an active emergency; the form does not dispatch help.
A private electrical fault needs a different response from a street-wide power cut. Tell us whether the whole property, one circuit or neighbouring buildings are affected. Mayfair arranges electrical fault investigation for homes and commercial premises across London.
When to call
Problems we can help with
- Repeated circuit tripping or sudden loss of power
- Damaged sockets, switches or light fittings
- Water affecting electrical installations
- Electrical faults preventing safe occupation or trading
Safety first
While you arrange help
For smoke, fire or immediate danger, leave the area and call 999. Do not touch wet electrical equipment or repeatedly reset a tripping circuit. For a network power cut, call 105.
What the visit can include
- Assess the affected installation and identify a safe route to fault finding.
- Isolate an unsafe circuit or fitting where appropriate.
- Complete a suitable repair, test the work and explain remaining restrictions.
Network supply faults require the electricity distributor. Specialist commercial equipment, replacement distribution equipment or extensive rewiring may need further parts, testing and attendance.
Detailed electrical repair guides & local areasTell us these details when you call
- Is the loss of power property-wide, on one circuit or also affecting neighbours?
- Is there water, heat, a burning smell or visible damage?
- What equipment stopped working and who can authorise a shutdown?
Add the full postcode, a safe contact number and who can arrange entry. Send photos only if you can take them safely.
Know the next step
Your emergency visit and price
Call for the charge for your fault and attendance time, including VAT and what the visit covers. Our small-repair offer starts from £85 including VAT for eligible accessible jobs; it is not a fixed price for every emergency. Parts, specialist equipment and further work are priced separately and need your approval.
We explain the expected arrival and charge when arranging your visit. If the problem needs a temporary make-safe measure first, we explain the permanent repair separately.
From the call to the repair
- Tell us the fault, postcode and any immediate risks.
- Agree the available attendance, access and price.
- The appropriate trade investigates and carries out suitable work, with extra work approved by you.
All 32 boroughs & the City of London
Emergency repair coverage across London
Call with your full postcode, whether you are in Mayfair, Marylebone, Kensington, Fulham, Camden, Islington, Stratford, Greenwich, Croydon or another London neighbourhood. The groups below help you find the existing local repair guides; postcode districts can cross borough boundaries and some postal areas extend beyond London.
Central London
Postcode areas include W1, WC1, WC2, EC1, EC2, EC3, EC4, SW1. Give the full address for attendance.
City of Westminster electrical guide City of London electrical guide Camden electrical guide Kensington and Chelsea electrical guideNorth London
Postcode areas include N, EN. Give the full address for attendance.
Barnet electrical guide Enfield electrical guide Haringey electrical guide Islington electrical guide Camden electrical guideNorth West London
Postcode areas include NW, HA. Give the full address for attendance.
Brent electrical guide Harrow electrical guide Barnet electrical guide Camden electrical guideWest London
Postcode areas include W, UB, TW. Give the full address for attendance.
Kensington and Chelsea electrical guide Hammersmith & Fulham electrical guide Ealing electrical guide Hounslow electrical guide Hillingdon electrical guideEast London
Postcode areas include E, IG, RM. Give the full address for attendance.
Hackney electrical guide Tower Hamlets electrical guide Newham electrical guide Waltham Forest electrical guide Redbridge electrical guide Barking and Dagenham electrical guide Havering electrical guideSouth East London
Postcode areas include SE, BR, DA. Give the full address for attendance.
Southwark electrical guide Lewisham electrical guide Greenwich electrical guide Bexley electrical guide Bromley electrical guideSouth West London
Postcode areas include SW, KT, SM, CR, TW. Give the full address for attendance.
Wandsworth electrical guide Lambeth electrical guide Merton electrical guide Richmond upon Thames electrical guide Kingston upon Thames electrical guide Sutton electrical guide Croydon electrical guideFor a managed building, tell us who can provide access to shared supplies, plant rooms or neighbouring premises. A shared-system fault may need the building manager involved.
Reactive repairs for commercial properties
Report the affected equipment or area, impact on trading, access hours and the person authorised to approve work. We help offices, shops, hospitality premises and managed buildings arrange maintenance around their operational needs.
Commercial maintenance solutionsEmergency repair questions
Can I call Mayfair 24 hours a day?
Yes. Contact Mayfair 24/7 for emergency and reactive maintenance across London, including evenings, weekends and bank holidays. Describe the fault and give your full postcode so attendance can be arranged.
How quickly can someone arrive?
We aim for arrival within 1 hour where available. Timing depends on your postcode, the specialist required, current availability and travel conditions. Safe access and weather also affect roofing and other external work. We explain the expected attendance when you call.
How much does an emergency repair cost?
Call for the charge for your fault and attendance time, including VAT and what the visit covers. Our small-repair offer starts from £85 including VAT for eligible accessible jobs; it is not a fixed price for every emergency. Parts, specialist equipment and further work are priced separately and need your approval.
Will an emergency visit restore every circuit?
Only circuits that can safely be energised should be restored. A damaged circuit may need to remain isolated until further repairs or tests are complete; the electrician should explain what can and cannot be used.
Can I send an emergency through the form?
Call for an active emergency. The form is useful for supporting details or a non-immediate repair, but it does not dispatch an engineer or book attendance.
Speak directly to Mayfair
Request your service quote.
Tell us what’s happening and where. We’ll help you work out the next step and what it costs.
No account needed. No payment to send an enquiry.
For an active emergency, call our 24/7 line on 020 4571 4235. This form does not dispatch an engineer. For immediate danger to people, call 999.
How your repair quote worksOther emergency repair services
Emergency plumbingBurst pipe, water pouring through a ceiling or a leak you cannot stop?24/7 contact · Scope & safety advice 
Boiler & heating breakdownsNo heating or hot water, a leaking boiler or pressure that keeps dropping?24/7 contact · Scope & safety advice 
Blocked drains & toiletsToilet overflowing, wastewater backing up or several drains blocked?24/7 contact · Scope & safety advice 
Roof leaks & storm damageRain coming in, damaged roof covering or a gutter overflowing into the building?24/7 contact · Scope & safety advice 
Doors, windows & make-safeDamaged door or window leaving your property exposed or unable to close?24/7 contact · Scope & safety advice Official safety and utility guidance
Cadent: gas emergencies · 105: power cuts · Thames Water: sewer flooding. Guidance reviewed 12 September 2026.