| A |
| Aable Electricalnot edited since 2019 | 14 Butter Hill, Carshalton | | | |
| B |
| Bright Sparx Electrical Services | 180-182 George Lane, South Woodford | brightsparxelectrical.co.uk | | |
| Bromley Electrical | 34 Silver Lane, West Wickham | | | |
| BW Electrical Contractorsnot edited since 2018 | South Beddington, no street on record | | | |
| C |
| CJ Electric | 29 Croft Avenue, West Wickham | | | |
| Connected Business Solutions | 562 Kingston Road, Raynes Park | connected-solutions.co.uk | | |
| E |
| Electric Works London | 85 Barlby Road, North Kensington | electricworkslondon.co.uk | | |
| Elex | 490 Green Lanes, Palmers Green | elex-uk.com | | |
| G |
| GDP Electricalnot edited since 2021 | Coney Hall, no street on record | | | |
| H |
| Henry Electrical Servicesnot edited since 2022 | Overbury Road, South Tottenham | | | |
| Horsted Services Ltdnot edited since 2020 | Unit 7a Chelsfield Lane, Ramsden | | | |
| J |
| J & N Electrical | Croydon, no street on record | | | |
| J C Electrical Ltd | Northumberland Heath, no street on record | | | |
| M |
| Melvins | 275 Putney Bridge Road, Putney | dvmelvin.com | | |
| Millwright's Plumbing and Electrical | Hounslow West, no street on record | | | |
| N |
| Nightglade Ltd | 2 Avery Hill Road, New Eltham | nightglade.co.uk | | |
| O |
| onsite electrical services | Rayners Lane, no street on record | | | |
| P |
| Peckfords | 215 Bramley Road, Oakwood | | | |
| Polarity Electrics Ltd | 13A Cattlegate Road Crews Hill, Crews Hill | polarityelectrics.co.uk | | |
| R |
| R & MA Stewart Ltd. | 250 Milkwood Road, Herne Hill | | | |
| S |
| Sky Electrical Ltd | 22 Bedford Road, Strawberry Hill | skyelectrical.co.uk | | |
| Southern Control Services Ltd | 46 Shirley Road, Longlands | | | |
| System Electrics Contractsnot edited since 2021 | 68–70 Mortlake High Street, Mortlake | | | |
| T |
| Thames Electricalnot edited since 2022 | Battersea, no street on record | | | |
| Thomas Nagy Electrical Contractorsnot edited since 2021 | Unit 3 West Gate, Alperton | thomasnagy.co.uk | | |
| W |
| WMN Electrician | 199 Uxbridge Road, Ealing | | | |
| X |
| XA Electrics Ltd | 11 Ashfield Parade, Southgate | xaelectrics.com | | |