| A J Heard Builders Limited | Okehampton | 2007 |
| A J Heating & Plumbing Services Ltd | Paignton | 2007 |
| A J Heating and Plumbing (Midlands) Limited | Walsall | 2016 |
| A J Heeran Limited | Ruislip | 2012 |
| A J Herbert Limited | New Milton | 2015 |
| A J HEY Building Services Limited | Hollinwood | 2017 |
| A J Hoarding Ltd | Barnet | 2020 |
| A J Hobbs Ltd | Bexhill-On-Sea | 2019 |
| A J Hodge Associates Limited | Bristol | 2011 |
| A J Hodgson & Sons Ltd | Norwich | 2011 |
| A J Holmes Building Ltd | Bridport | 2025 |
| A J House Contract Carpentry Ltd | Truro | 2002 |
| A J Howson Ltd | Clitheroe | 2025 |
| A J Humber Electrical Services Limited | Nottingham | 2008 |
| A J Hunkin Decorators Limited | St Austell | 2007 |
| A J Ireland & SON Ltd | Morley | 2008 |
| A J J Developments Ltd | Bristol | 2021 |
| A J Jackson Development Limited | Hinckley | 2013 |
| A J Jarrett Electrical Ltd. | Bristol | 2026 |
| A J Joinery & Building Lincolnshire Limited | Barnetby | 2005 |
| A J Joinery & Glazing Ltd | Preston | 2020 |
| A J Joinery (North West) Limited | Lancaster | 2021 |
| A J Jolly Consultants Limited | Glasgow | 2007 |
| A J K Carpentry and Construction Ltd | Waltham Cross | 2015 |
| A J K Projects Ltd | Chatham | 2020 |
| A J Kernahan Developments Limited | Swindon | 2005 |
| A J Kerry S&T Ltd | Ipswich | 2017 |
| A J Kershaw Developments Ltd | Leicester | 2025 |
| A J Kingsley Ltd | Bournemouth | 2015 |
| A J Kitchen Installations Limited | Liverpool | 2017 |
| A J L Homes Limited | Essex | 2025 |
| A J L Mechanical Ltd | Southampton | 2016 |
| A J L Timber Limited | Reigate | 2018 |
| A J Last Limited | Norwich | 2018 |
| A J Leather Building Services Ltd | Colchester | 2025 |
| A J LEE Developments Limited | Ely | 2013 |
| A J LEE Ltd | Aylesford | 2016 |
| A J LIA Painting & Decorating Ltd | Caerdydd | 2022 |
| A J Lifting Limited | Edgware | 2014 |
| A J Lighton Engineering Services Ltd | Peterborough | 2024 |
| A J Lofthouse Scaffolding Ltd | Barnsley | 2024 |
| A J Lord and Sons Limited | Witney | 2012 |
| A J Loveland (Central) Limited | Rotherham | 2008 |
| A J Lowe Brickwork Contractor Ltd | Southampton | 2010 |
| A J Lumley Services Ltd | Wincanton | 2019 |
| A J Lynn Building Contractors Limited | Leicester | 2014 |
| A J M Decorating Services Limited | Waltham Abbey | 2004 |
| A J M Painters & Decorators Ltd | Wallsend | 2015 |
| A J M Roofing & Cladding Limited | West Midlands | 2003 |
| A J M Structural Engineers Ltd | Nuneaton | 2017 |
| A J M Windows S.W Ltd | Torquay | 2010 |
| A J Mackay Contractors Ltd | Inverness | 2010 |
| A J Maddox General Builders Ltd | Shrewsbury | 2020 |
| A J Marr Plumbing & Heating Ltd | Doncaster | 2025 |
| A J Marsh Services Limited | Mountain Ash | 2019 |
| A J Mason Flooring Limited | Eastleigh | 2013 |
| A J Matthews Civils Ltd | Scunthorpe | 2023 |
| A J Mccabe Limited | Northwich | 2003 |
| A J Mccarthy Carpentry & Joinery Ltd | Stevenage | 2014 |
| A J Mcdermott Ltd | London | 2018 |
| A J Mcleod Ltd. | Inverness | 2007 |
| A J Mcnair Carpentry Services Ltd | Northampton | 2005 |
| A J Mcpherson Limited | Kinross | 2015 |
| A J Mechanical & Electrical Services Limited | Bridgend | 2002 |
| A J Miller Consulting Engineers (UK) Ltd | Liverpool | 2017 |
| A J Molland Contractors Limited | Dudley | 2011 |
| A J Moran Limited | Reading | 1999 |
| A J Morley Flooring Limited | Epsom | 2021 |
| A J Morris & SON Limited | Stoke-On-Trent | 2018 |
| A J Morris Ltd | Grantham | 2007 |
| A J Mullins Window Products Limited | Stocksfield | 2026 |
| A J N Brickwork Limited | Hailsham | 2007 |
| A J N Contracts Ltd | Bromyard | 2016 |
| A J N Electrical (Dorset) Limited | Sturminster Newton | 2002 |
| A J Nash Builders Limited | Launceston | 2005 |
| A J Norman Plumbing & Heating Services Ltd | Billericay | 2023 |
| A J O Electrical Services Limited | East Ham | 2014 |
| A J O Plumbing and Heating Limited | London | 2017 |
| A J O'Connor Projects Ltd | Woodstock | 2019 |
| A J Orme Plant Hire Limited | Exeter | 2010 |
| A J Owens Builders Limited | Liverpool | 2019 |
| A J P Homes Limited | York | 2004 |
| A J P Joinery Limited | Evesham | 2014 |
| A J Palmer Building & Maintenance Services Limited | Norwich | 2004 |
| A J Pell Carpentry Limited | Orpington | 2016 |
| A J Pipeline (Anglesey) Limited | Llangefni | 2013 |
| A J Plaster Electrical Services Limited | Bristol | 1997 |
| A J Plastering Ltd | Southampton | 2025 |
| A J Platinum Groundworks Ltd | Swansea | 2025 |
| A J Plumbing Services Limited | Bridgend | 2012 |
| A J Porter & SON Brickwork Limited | Surbiton | 2012 |
| A J Pottinger Limited | Lerwick | 2019 |
| A J Poulton Roofing Limited | West Rainton | 2012 |
| A J Precast Limited | Tetbury | 2017 |
| A J Prentice Building and Renovation Ltd | Haverhill | 2022 |
| A J Price Carpenter and Builder Ltd | Aberystwyth | 2022 |
| A J Price Decorators Limited | West Midlands | 2007 |
| A J Price Electrical Contractors Limited | Worcester | 2003 |
| A J Price Electrical Limited | Worcester | 2021 |
| A J Price Lifting Ltd | Waterlooville | 2017 |