| AJ New Heating and Plumbing Ltd | Crewe | 2014 |
| AJ Niner Ltd | Rugby | 2015 |
| AJ Offshore Wind Ltd | Driffield | 2026 |
| AJ Olds Groundworks & Co Ltd | Constantine | 2023 |
| AJ Pallets & Goods Ltd | Manchester | 2017 |
| AJ Partition Interiors Ltd | Barnet | 2022 |
| AJ Partitions and Ceilings Ltd | Rotherham | 2023 |
| AJ Partners Ltd | South Ockendon | 2013 |
| AJ Passive Fire Solutions Ltd | Stalybridge | 2026 |
| AJ Patrick GAS Engineer and Plumbing Ltd | London | 2020 |
| AJ Piling Ltd | Consett | 2023 |
| AJ Pipework Engineering Ltd | Stoke-On-Trent | 2018 |
| AJ Pipework Ltd | Maesteg | 2024 |
| AJ Plant Hire (Wales) Ltd | Port Talbot | 2021 |
| AJ Plasterers Ltd | London | 2025 |
| AJ Plastering Solutions Ltd | Liverpool | 2024 |
| AJ Platinum Building Limited | Swansea | 2025 |
| AJ Plumbers Ltd | Oldham | 2024 |
| AJ Plumbing & Building Ltd | Wolverhampton | 2022 |
| AJ Plumbing & Heating (Norfolk) Ltd | Lowestoft | 2018 |
| AJ Plumbing and Heating Ltd | Coulsdon | 2018 |
| AJ Plumbing and Heating Services Ltd | Chippenham | 2019 |
| AJ Plumbing and Mechanical Limited | Northolt | 2014 |
| AJ Plumbing and Property Development Ltd | Margate | 2024 |
| AJ Plumbing and Property Service Ltd | London | 2022 |
| AJ Plumbing North West Ltd | Chorley | 2024 |
| AJ Plumbing&Building Services Limited | Southsea | 2023 |
| AJ Power Solutions Ltd | Portsmouth | 2024 |
| AJ Prestige Building Company Ltd | Hayes | 2022 |
| AJ Pro Construct Ltd | Chessington | 2023 |
| AJ Property (Kent) Limited | Hadlow | 2025 |
| AJ Property (Manchester) Ltd | Salford | 2023 |
| AJ Property Construction & Development Ltd | Leek | 2018 |
| AJ Property Services & Maintenance Limited | Caerphilly | 2024 |
| AJ Property Services (Swansea) Ltd | Swansea | 2021 |
| AJ Radley Ltd | Ellesmere Port | 2026 |
| AJ Ragu Limited | London | 2020 |
| AJ REC Solutions Limited | Scunthorpe | 2018 |
| AJ Recruitment Agency Ltd | Birmingham | 2024 |
| AJ Refurb Specialist Ltd | London | 2025 |
| AJ Remedials & Groundworks Ltd | Barnsley | 2025 |
| AJ Rendering Ltd | London | 2025 |
| AJ Renewables & Services Ltd | Shipley | 2022 |
| AJ Renovations Ltd | Nelson | 2025 |
| AJ Richardson Flooring Limited | Doncaster | 2026 |
| AJ Roadworks Limited | Doncaster | 2025 |
| AJ Roberts Carpentry Limited | Cullompton | 2012 |
| AJ Roberts Construction (Main Street) Ltd | Leeds | 2025 |
| AJ Roofcare Ltd | Barns Green Horsham | 2024 |
| AJ Roofing & Building Solutions Limited | Mitcham | 2024 |
| AJ Roofing & Cladding Limited | Torquay | 2017 |
| AJ Roofing & Guttering Ltd | Chester | 2025 |
| AJ Roofing & Gutters Ltd | Westbury | 2026 |
| AJ Roofing & Plastic Supplies Ltd | Dagenham | 2024 |
| AJ Roofing Bristol Limited | Bristol | 2026 |
| AJ Roofing Hertfordshire Ltd | Biggleswade | 2026 |
| AJ Roofing Services Ltd | Coventry | 2021 |
| AJ Rushby Plumbing and Heating Limited | Hull | 2021 |
| AJ Ryder Plumbing Services Limited | Thirsk | 2014 |
| AJ Sandelands Limited | Carlisle | 2019 |
| AJ Scaffolding (Halifax) Ltd | Halifax | 2025 |
| AJ Scaffolding (Yorkshire) Limited | Sherburn In Elmet | 2007 |
| AJ Scaffolding Access Ltd | Tamworth | 2025 |
| AJ Scaffolding Services Ltd | Dartford | 2017 |
| AJ Scaffolds Ltd | Burnley | 2026 |
| AJ Security and Cabling Solutions Limited | Northampton | 2021 |
| AJ Sellwood Building Solutions Limited | Reading | 2019 |
| AJ Sergent Roofing Ltd | Reading | 2026 |
| AJ Services & Build Ltd | Romsey | 2026 |
| AJ Services ( Bridgend) Limited | Bridgend | 2017 |
| AJ Services CH Limited | Leicester | 2025 |
| AJ Sharma Building Co Limited | London | 2025 |
| AJ Short Electrical Limited | Brighton | 2022 |
| AJ Shutters & Blinds Ltd | Stoke-On-Trent | 2024 |
| AJ Signalling Ltd | Clifton Moor | 2022 |
| AJ Simkins Services Ltd | Sutton Coldfield | 2014 |
| AJ Singh Constructions Limited | Hounslow | 2022 |
| AJ Smith Holdings Limited | Cardiff | 2021 |
| AJ Sons Civils Limited | Wakefield | 2021 |
| AJ South Carpentry and Construction Ltd | Hove | 2019 |
| AJ Southall Services Limited | Wolverhampton | 2025 |
| AJ Sparkes Services Ltd | Stafford | 2022 |
| AJ Sparks Limited | Rhyl | 2016 |
| AJ Starkey Electrical Ltd | Newquay | 2024 |
| AJ Steadfast Ltd | Grays | 2025 |
| AJ Steel Fire Doors & Shutters Limited | London | 2026 |
| AJ Steel Rigging and Lifting Ltd | Ossett | 2016 |
| AJ Steelerection Rigging and Lifting Ltd | Wrexham | 2025 |
| AJ Stone Masonry Ltd | Hamilton | 2020 |
| AJ Stove & Heating Installations Ltd | Skipton | 2024 |
| AJ Stratford Limited | Abbots Langley | 2003 |
| AJ Sussex Construction Ltd | Hove | 2015 |
| AJ Sussex Limited | Burgess Hill | 2024 |
| AJ Taylor Decorators Ltd | Heywood | 2026 |
| AJ Team Installation (2013) Limited | Spalding | 2016 |
| AJ Team Ltd | Basildon | 2023 |
| AJ Tech Innovations Limited | Chessington | 2023 |
| AJ Tensile Biogas Systems Limited | Chepstow | 2025 |
| AJ Tiling Contracts Limited | Liverpool | 2019 |
| AJ Timber Group Ltd | Romford | 2023 |