| AJ Electrical & Security Services Ltd | Coventry | 2018 |
| AJ Electrical & Trades Ltd | Derby | 2025 |
| AJ Electrical (Bridgnorth) Limited | Bridgnorth | 2014 |
| AJ Electrical (Herts) Contractors Limited | Hemel Hempstead | 2010 |
| AJ Electrical (Southampton) Limited | Southampton | 2016 |
| AJ Electrical and Plumbing Limited | London | 2017 |
| AJ Electrical Energy Ltd | Liverpool | 2016 |
| AJ Electrical Installation Ltd | Southport | 2026 |
| AJ Electrical Ltd | Stockton-On-Tees | 2018 |
| AJ Electrical NW Limited | Blackburn | 2026 |
| AJ Electrical Partnership Limited | Bridgend | 2016 |
| AJ Electrical Services (Essex) Ltd | Wickford | 2011 |
| AJ Electrical Services (NE) Limited | Newcastle Upon Tyne | 2021 |
| AJ Electrical Services Limited | Wakefield | 2002 |
| AJ Electrical Solutions Ltd | Edgware | 2022 |
| AJ Electricalservices Ltd | Bournemouth | 2012 |
| AJ Electrician Ltd | London | 2019 |
| AJ Elite Electricians Ltd | London | 2024 |
| AJ Environmental Recovery Services Limited | Hitchin | 2010 |
| AJ Essex Ltd | Braintree | 2022 |
| AJ Facilities Group Ltd | London | 2026 |
| AJ Family Ltd | Benfleet | 2016 |
| AJ Fire and Security Ltd | Chelmsford | 2005 |
| AJ Fire Group Ltd | London | 2026 |
| AJ Fire Ltd | Caerdydd | 2025 |
| AJ Floor Care Limited | Erith | 2019 |
| AJ Floor Sanding & Sealing Ltd | Pershore | 2017 |
| AJ Flooring Consultancy Limited | Dartford | 2010 |
| AJ Ford Electrical Solutions Ltd | Bedford | 2025 |
| AJ Forrester Electrical Limited | Liverpool | 2023 |
| AJ Fortis Construction Ltd | London | 2026 |
| AJ GAS & Plumbing Ltd | Birmingham | 2024 |
| AJ GAS and Ground Works Limited | Huddersfield | 2013 |
| AJ GAS Services Ltd | Burton-On-Trent | 2017 |
| AJ Gastech Ltd | Bingley | 2016 |
| AJ Glass & Glazing Ltd | Grangemouth | 2017 |
| AJ Glass and Glazing (NW) Limited | Altrincham | 2022 |
| AJ Glazing Ltd | Ashington | 2019 |
| AJ Gordon & Sons Builders Limited | Lancing | 2012 |
| AJ Green Energy Solutions Ltd | Erith | 2023 |
| AJ Griggs Roofing and Cladding Services Ltd | Goole | 2021 |
| AJ Groundworks and Civil Engineering Ltd | Southam | 2023 |
| AJ Group Cambridge Limited | Oldham | 2022 |
| AJ Gull Electrical Services Ltd | Rochford | 2016 |
| AJ Haffenden Electrical Services Ltd | Maidstone | 2014 |
| AJ Handyman Ltd | Birmingham | 2026 |
| AJ Harbour Developments Ltd | Kendal | 2023 |
| AJ Heat & Plumb Ltd | Nottingham | 2020 |
| AJ Heating Ltd | Barking | 2022 |
| AJ Heating Plumbing and Home Services Ltd | Edinburgh | 2022 |
| AJ Heating Services Ltd | Romford | 2022 |
| AJ Heating Solutions Limited | Dunstable | 2026 |
| AJ Hills Specialist Installations Limited | Chatham | 2013 |
| AJ Holford Building & Roofing Contractors Ltd | Stourport-On-Severn | 2016 |
| AJ Home and Garden Ltd | London | 2013 |
| AJ Home Build Ltd | Hounslow | 2024 |
| AJ Home Projects Ltd | Bedford | 2023 |
| AJ Home Renovations and Repairs Ltd | Luton | 2024 |
| AJ Home Renovations Ltd | London | 2023 |
| AJ Home Services Ltd | Westbury | 2026 |
| AJ Homes and Designs Ltd | Doncaster | 2026 |
| AJ Homes Construction UK Ltd | Hook | 2025 |
| AJ Hygienic Interiors Limited | Colchester | 2013 |
| AJ Industrial Roofing and Cladding Limited | Stockbridge | 2021 |
| AJ Installations 22 Ltd | Smethwick | 2025 |
| AJ Installations Limited | Buckingham | 2024 |
| AJ Interior Renovations Ltd | Sutton Coldfield | 2026 |
| AJ Interiors Ltd | Sheffield | 2026 |
| AJ International Ltd | Swindon | 2018 |
| AJ Irrigation Ltd | Redditch | 2024 |
| AJ Joiners Limited | Clydebank | 2024 |
| AJ Joinery & Building Limited | Sandbach | 2003 |
| AJ Joinery and Maintenance Ltd | Coleraine | 2023 |
| AJ Joinery and Property Maintenance Ltd | Arnold | 2015 |
| AJ Joinery and Shopfitting Ltd | Clydebank | 2025 |
| AJ Kitchen and Bathrooms Ltd | Bradford | 2025 |
| AJ Knutsford Developments Ltd | Knutsford | 2025 |
| AJ Lacey Project Management Ltd | Halesowen | 2025 |
| AJ Landscape & Construction Ltd | Swindon | 2024 |
| AJ Lettings and Developments Ltd | Portishead | 2017 |
| AJ Lifting Solutions Ltd | Norwich | 2012 |
| AJ Lockey Services Ltd | Cheltenham | 2022 |
| AJ Loft Rooms Roofing Ltd | Chelmsford | 2021 |
| AJ London Construction Ltd | London | 2024 |
| AJ Lucas Roofing Contractors Limited | Hadlow | 2006 |
| AJ LUX Builders Ltd | Brentford | 2023 |
| AJ Luxury Glazing Limited | London | 2024 |
| AJ Machin Construction Ltd | Lincoln | 2019 |
| AJ Maintenance Services Limited | Harrow | 2019 |
| AJ Management Group Ltd | Bromley | 2023 |
| AJ Manufacturing and Maintenance Ltd | Gateshead | 2019 |
| AJ Marsden Ltd | Oldham | 2005 |
| AJ Mcginley Renovations Ltd | Watford | 2026 |
| AJ Mechanical UK Ltd | Burnham On Crouch | 2021 |
| AJ Miller (UK) Limited | Wirral | 2002 |
| AJ Mills Carpentry Limited | Cardiff | 2017 |
| AJ Morris Plastering and Construction Limited | Nelson | 2021 |
| AJ Moss Building Services Limited | Hurst | 2019 |
| AJ Murphy Surveyors Ltd | London | 2014 |
| AJ Murray Developments Ltd | Liverpool | 2025 |