| A Howe Plumbing & Heating Ltd | Newark | 2012 |
| A Howitt Property Development Ltd | Sidmouth | 2025 |
| A Howitt Renovations Limited | Sidmouth | 2021 |
| A Howley Limited | London | 2003 |
| A Hoxha Construction Ltd | Waltham Abbey | 2023 |
| A Hughes Building & Joinery Services Ltd | Barnard Castle | 2024 |
| A Hughes Building Services Ltd | Coventry | 2025 |
| A Hughes Developments Ltd | Coventry | 2025 |
| A Hughes Plumbing & Heating Ltd | Leyland | 2008 |
| A Humphries & SON Roofing Limited | Swindon | 2015 |
| A Hunt Building and Joinery Ltd | Southport | 2026 |
| A Hunter Builders (Scotland) Limited | Stirling | 2010 |
| A Hunter Groundworks Limited | Spennymoor | 2015 |
| A Hunter Roofing and Renovations Ltd | Workington | 2016 |
| A Hyatt Contractors Limited | Petersfield | 2017 |
| A I & Z a Grant Ltd | Bristol | 2009 |
| A I Brickwork Ltd | Ely | 2014 |
| A I Construction Consultancy Services Limited | Middlesbrough | 2024 |
| A I Drylining Contractors UK Limited | Manchester | 2025 |
| A I E Industrial Engineering Limited | Westcliff On Sea | 2018 |
| A I Electrical & Renewables Limited | Preston | 2016 |
| A I Electrical Engineering Limited | Spennymoor | 2023 |
| A I Heating Ltd | London | 2017 |
| A I Joinery and Shopfitting Ltd | Chester Le Street | 2018 |
| A I K Coatings Ltd | Heathfield | 2024 |
| A I Land Limited | Whalley | 2014 |
| A I M (Stroud) Ltd | Stonehouse | 2018 |
| A I M Testing Ltd | Bournemouth | 2017 |
| A I Mackenzie Contractors Ltd | Tain | 2019 |
| A I Mason Street Furniture Installations Limited | Sutton-In-Ashfield | 1999 |
| A I Mckellar Limited | Emsworth | 2017 |
| A I Mercer & SON Limited | Salisbury | 2019 |
| A I Morris Roofing Limited | Walsall | 2006 |
| A I Roberts Carpentry Ltd | Northampton | 2016 |
| A Indge Utilities Ltd | Kettering | 2024 |
| A Interior Systems Ltd | Portsmouth | 2016 |
| A Interiors Limited | London | 2010 |
| A Iqbal Constructions Ltd | Slough | 2018 |
| A Isaac Properties Ltd | Bath | 2024 |
| A Isaac Roofing Ltd | Bath | 2020 |
| A J & V a Properties Limited | Worthing | 2018 |
| A J a Consulting (Leicester) Limited | Leicester | 2015 |
| A J a Contracts Limited | Hinckley | 2002 |
| A J Allen Carpentry Services Ltd. | Gloucester | 2014 |
| A J and D Property Limited | Felsted | 2020 |
| A J and S Developments Limited | Rotherham | 2021 |
| A J B Building & Maintenance Limited | Northwood | 2026 |
| A J B Building Limited | Croydon | 2012 |
| A J B Construction Ltd | Bournemouth | 2014 |
| A J B Plastering Limited | Worcester | 2003 |
| A J Bailey Electrical Contractors & Engineers Limited | Meadow Lanesalisbury | 2004 |
| A J Baker [Builders] Limited | Norwich | 2002 |
| A J Barnes Plumbing & Heating Limited | Plymouth | 2003 |
| A J Barrott Construction Limited | London | 2008 |
| A J Bathrooms and Boilers Ltd | Dunfermline | 2017 |
| A J Beale Electrical Limited | Canvey Island | 2023 |
| A J Belford Ltd | Bradford | 2023 |
| A J Bennett (UK) Limited | Abingdon | 2008 |
| A J Bespoke Ltd | London | 2021 |
| A J Bihla Construction Limited | Southall | 2021 |
| A J Black Limited | Loughborough | 2019 |
| A J Block Laying Ltd | Cardiff | 2017 |
| A J Bloomfield Carpentry & Joinery Ltd | Eastleigh | 2013 |
| A J Boiler Maintenance Limited | Lydney | 2007 |
| A J Bremner Construction Ltd | Dundee | 2015 |
| A J Broome Limited | Halifax | 2014 |
| A J Browne Civil Engineering Ltd | Sutton Coldfield | 2015 |
| A J Buckley Air Solutions Limited | Stafford | 2023 |
| A J Builders (Suffolk) Limited | Lowestoft | 2011 |
| A J Builders Civils & Construction Ltd | Inverness | 2020 |
| A J Building & Plumbing Services Limited | Ferndown | 2018 |
| A J Building (Leeds) Limited | Leeds | 2020 |
| A J Building and Property Maintenance Ltd | Shifnal | 2017 |
| A J Building Limited | Braintree | 2015 |
| A J Building Maintenance & Refurbishment Limited | St. Helens | 2023 |
| A J Building Services (NW) Limited | Bootle | 2006 |
| A J Building Services (ST Albans) Ltd | Luton | 2021 |
| A J Building Solutions NW Ltd | Wigan | 2024 |
| A J Bull Scaffolding (Southern) Ltd | Southampton | 2024 |
| A J Bullen Ltd | Billericay | 2026 |
| A J Butler Contracting Limited | Carmarthen | 2021 |
| A J Butler Joinery Limited | Blackburn | 2005 |
| A J Buttery Limited | Derbyshire | 2003 |
| A J C Civils Ltd | Tarbert | 2004 |
| A J C Comms Ltd | Ormskirk | 2019 |
| A J C E Ltd. | Lincoln | 2003 |
| A J C Flooring Installations Limited | Stoke-On-Trent | 2017 |
| A J C M Electrical Limited | Nuneaton | 2016 |
| A J C Stockley Ltd | East Grinstead | 2018 |
| A J Cable Services Limited | Glasgow | 2002 |
| A J Cameron(Plant Hire) Ltd | Strathpeffer | 2025 |
| A J Cane Painting & Decorating Specialists Limited | Aldermaston | 2003 |
| A J Canning Roofing Ltd | Newmarket | 2006 |
| A J Carpentry & Roofing Limited | Dartford | 2014 |
| A J Carpentry and Construction Ltd | Sutton | 2024 |
| A J Carpentry Kent Limited | Chatham | 2018 |
| A J Carr Limited | Carlisle | 2003 |
| A J Ceilings & Partitions Ltd | Ringwood | 2014 |
| A J Cheetham Painter & Decorator Limited | Swadlincote | 2014 |
| A J Chew Civils Ltd | London | 2026 |