| A J Prior Plumbing and Heating Ltd | Wallingford | 2019 |
| A J Properties (London) Limited | Hayes | 2013 |
| A J Properties and Renovations Ltd | Earlswood | 2024 |
| A J Properties Limited | Yelverton | 2012 |
| A J Property Developments Limited | Southend-On-Sea | 2001 |
| A J Property Maintenance (Bristol) Ltd | Bristol | 2013 |
| A J Property Maintenance Ltd | Bristol | 2013 |
| A J R Carpentry Limited | Corby | 2002 |
| A J R Groundworks Limited | Accrington | 2026 |
| A J R Roofing Contractors Limited | Kidderminster | 2005 |
| A J Radford Building Services Limited | High Wycombe | 2002 |
| A J RAY Drylining Limited | Kettering | 2004 |
| A J Renovate Ltd | Cardiff | 2024 |
| A J Riley Landscapes and Building Limited | Lancaster | 2017 |
| A J Robertson Fencing Ltd | Inverness | 2019 |
| A J Rogers Bricklaying Contractors Ltd | Great Chesterford | 2008 |
| A J Rogers Developments Ltd | London | 2018 |
| A J Roofing Contractors Limited | Spalding | 2017 |
| A J Roofing Limited | West Midlands | 1999 |
| A J Roofing Solutions Ltd | Maidstone | 2025 |
| A J Roofing Specialist Limited | Ilford | 2020 |
| A J Ropes and Renewables Limited | Hull | 2023 |
| A J Rutter Limited | Shrewsbury | 2010 |
| A J S (Roofing & Cladding) Limited | Market Rasen | 2009 |
| A J S Developments Limited | Weymouth | 1992 |
| A J S Drylining Limited | Thurleigh | 2000 |
| A J S Plumbing & Heating Limited | Fakenham | 2003 |
| A J Samson Limited | Ashford | 1998 |
| A J Sanders Electrical Limited | Malvern | 2017 |
| A J Sansum Construction Ltd Ltd | Plymouth | 2016 |
| A J Sargent Electrical Solutions Limited | Woodbridge | 2016 |
| A J Scaffolding Limited | Canvey Island | 1995 |
| A J Scattergood Plant Hire Limited | Leicester | 2007 |
| A J Scott Plumbing & Heating Limited | Shipley | 2026 |
| A J Scutchings & SON Ltd | Bedford | 2020 |
| A J Services (Swansea) Ltd. | Swansea | 2003 |
| A J Shone & SON Limited | Chester | 2001 |
| A J Shooter Decorators Limited | Leeds | 2017 |
| A J Shopfitting Ltd | Leigh On Sea | 2011 |
| A J Singh Holdings Ltd | Hounslow | 2024 |
| A J Slater Limited | Chippenham | 2003 |
| A J Sleggs Limited | Rochester | 2023 |
| A J Smith (Telford) Limited | London | 2010 |
| A J Smith Building Services Limited | Alton | 2006 |
| A J Smith Electrical Ltd | Thornton Heath | 2010 |
| A J Smith Joinery Limited | North Shields | 2023 |
| A J Softley Civil Engineering Limited | Dover | 2017 |
| A J Steel Erecting Ltd | Swanage | 2023 |
| A J Steel Fixing Ltd | Dagenham | 2026 |
| A J Steel Ltd | Swanage | 2015 |
| A J Stiff Construction Limited | Stowmarket | 2017 |
| A J Structural Steels Limited | West Yorkshire | 2002 |
| A J Surveying Limited | London | 2005 |
| A J Syder Plumbing & Heating Ltd | Norwich | 2013 |
| A J Sykes Building Contractor Ltd | Church Fenton | 2022 |
| A J T Brickwork Ltd | Hemel Hempstead | 2016 |
| A J T Building Services Ltd | Sandy | 2020 |
| A J T Electrical (Notts) Ltd | Newark | 2014 |
| A J Tanner Carpentry Ltd | Chilcpmpton | 2016 |
| A J Thompson Construction Ltd | Ashbourne | 2019 |
| A J Tiling (Leeds) Limited | Leeds | 2010 |
| A J Tiling Limited | Leicester | 2005 |
| A J Tomlin Brickwork Ltd | Bedford | 2004 |
| A J Trendle Electrical Limited | Watford | 2014 |
| A J TYE Engineering Ltd | Worcester | 2013 |
| A J Upton Developments Ltd | Solihull | 2024 |
| A J W Decorating Limited | Cannock | 2022 |
| A J W Development Limited | Chichester | 2007 |
| A J W Engineering Ltd | Northallerton | 2004 |
| A J W Painting Limited | Bedworth | 2014 |
| A J Walker Limited | Towcester | 2014 |
| A J Waters Construction Limited | Diss | 2022 |
| A J Welding Ltd | Wirral | 2026 |
| A J Wigley Joinery and Building Limited | Nottingham | 2019 |
| A J Wildash Limited | Colchester | 2005 |
| A J Willetts Limited | Salisbury | 2005 |
| A J Williams Builders Limited | Langport | 2000 |
| A J Williams Electrical Ltd | Taunton | 2017 |
| A J Williams Mechanical Ltd | Ilford | 2026 |
| A J Wilson & Co Ltd | Liskeard | 1996 |
| A J Wilsons Joinery Limited | Andover | 2014 |
| A J Windows and Doors Ltd | Sandwich | 2021 |
| A J Windows Ltd | Luton | 2020 |
| A J Woods Brickworks Limited | Lancashire | 2007 |
| A J Wragg Ltd | Bakewell | 2007 |
| A J'S Powder Coating Ltd | Oswestry | 2021 |
| A J'S Property Maintenance (Llanelli) Limited | Ammanford | 2018 |
| A Jack Glass & Glazing Limited | Edinburgh | 2010 |
| A Jackaman Carpentry Limited | Ipswich | 2006 |
| A Jackson & Sons Limited | Rossendale | 2025 |
| A Jackson Builders Ltd | Boston | 2021 |
| A Jacksons Flooring Ltd | Middlesbrough | 2017 |
| A Jaku.Electrics Limited | Carshalton | 2015 |
| A James Builders Limited | Cranbrook | 2025 |
| A James Building Ltd | Covent Garden | 2023 |
| A James Developments Limited | Stockport | 2015 |
| A James Homes Limited | Stockport | 2021 |
| A James Roofing Ltd | Banff | 2026 |
| A James Scaffolding Limited | Stockport | 2009 |
| A Jaromin Home Improvements Ltd | Birmingham | 2016 |