| A.J.P Decorating Ltd | Gosport | 2026 |
| A.J.P Solutions Ltd | Southampton | 2014 |
| A.J.P. Electrical Limited | Dursley | 1997 |
| A.J.P. Services Limited | Cullompton | 2007 |
| A.J.Percy(Builders)Limited | Redhill | 1959 |
| A.J.R Coleman Electrical Services Ltd | Bridgwater | 2021 |
| A.J.R. Electrical Services (Banbury) Limited | Northampton | 2007 |
| A.J.Ray Ltd | Stratford-Upon-Avon | 2019 |
| A.J.S Building Services Ltd | London | 2021 |
| A.J.S Dales Scaffolding Limited | Barnoldswick | 2008 |
| A.J.S Joinery Services Ltd | Great Yarmouth | 2019 |
| A.J.S. Baileys Electrical Limited | Wigan | 2012 |
| A.J.S. Construction (S.W.) Limited | Bristol | 2000 |
| A.J.S. Electrical (Bristol) Limited | Bristol | 2003 |
| A.J.S. Electrical (SE) Limited | Maidstone | 2004 |
| A.J.S. Scaffolding Services Limited | Rochford | 2000 |
| A.J.S. Services (Yorkshire) Limited | Barnsley | 2013 |
| A.J.S. Site Services Limited | Chatham | 2007 |
| A.J.Sellwood Contracting Ltd | Reading | 2013 |
| A.J.Stacey Joinery Ltd | Abergele | 2021 |
| A.J.T. Electrical Services Midlands Ltd | Tamworth | 2022 |
| A.J.T. Wattrus Limited | Solihull | 1999 |
| A.J.T.Investments Limited | Cheshunt | 1959 |
| A.J.Taylor Building Services Limited | Keighley | 2017 |
| A.J.Thomson Ltd | Ipswich | 2006 |
| A.J.W Properties & Property Maintenance Ltd | Rotherham | 2023 |
| A.J.W Works Ltd | Rotherham | 2018 |
| A.Jerevija Construction Ltd | London | 2025 |
| A.Johnson Inc Ltd | Chelmsford | 2025 |
| A.Jupes Plumbing & Heating Services Ltd | Lyndhurst | 2015 |
| A.K & Sons Roofing Ltd | Hayes | 2025 |
| A.K Brickwork Limited | Smethwick | 2024 |
| A.K Builder London Ltd | Croydon | 2019 |
| A.K Construction of London Ltd | Hornchurch | 2018 |
| A.K Fab-Weld Ltd | Hull | 2023 |
| A.K Forks Limited | Durham | 2018 |
| A.K Granite and Stone Solutions Ltd | Nottingham | 2023 |
| A.K Painting & Decorating Services Ltd | Wigan | 2026 |
| A.K Plastering & Rendering Ltd | Leeds | 2018 |
| A.K. Building Services (Abingdon) Ltd | Wantage | 2023 |
| A.K. Construction & Design Limited | Palmers Green | 2016 |
| A.K. Electrical (Kent) Ltd | Gravesend | 2014 |
| A.K. Electrical Engineering Limited | Keston | 2014 |
| A.K. General Builders Limited | Bracknell | 1996 |
| A.K. Halsey Electrical Limited | Kidlington | 2023 |
| A.K. Heating Ltd | Wigan | 2003 |
| A.K. Marshall GAS Specialists Ltd | Sawston | 2002 |
| A.K. Wilson Consultants Limited | Chard | 2012 |
| A.K. Woricker & Sons Limited | Chelmsford | 1987 |
| A.K.A Developments Ltd | Bishop'S Stortford | 2019 |
| A.K.B Builders Ltd | Thornton-Cleveleys | 2021 |
| A.K.B Superior Interior Installation's Limited | Basildon | 2018 |
| A.K.H. Bedrooms Ltd | Wednesbury | 2018 |
| A.K.K Builders (UK) Ltd | London | 2018 |
| A.K.M Mechanical Ltd | Greenford | 2024 |
| A.K.M NW Plumbing & Heating Ltd | Blackburn | 2025 |
| A.K.Management Consultants Limited | Derby | 2004 |
| A.K.N Construction Ltd | North Ferriby | 2016 |
| A.K.S. Air Conditioning Limited | Liverpool | 1999 |
| A.K.S. Electrical Limited | | 2005 |
| A.Kendal Builders (N/E) Limited | Sunderland | 2016 |
| A.Kola Groundwork (U.K.) Ltd | Ilford | 2023 |
| A.Koukla's Limited | London | 2024 |
| A.Kryeziu Builders Ltd | Edgware | 2022 |
| A.L Electrical Solutions Ltd | Folkestone | 2025 |
| A.L Evergreen Ltd | London | 2019 |
| A.L Maintenance Limited | London | 2025 |
| A.L Painters Limited | Stoke-On-Trent | 2026 |
| A.L Plumbing & GAS Services Limited | High Wycombe | 2023 |
| A.L. Baldwin & SON Limited | Worcestershire | 2005 |
| A.L. Concept Limited | Croydon | 1997 |
| A.L. Contracts Contractors & Paving Specialists Ltd | Colchester | 2019 |
| A.L. Contracts Italia Ltd | London | 2017 |
| A.L. House Renovations Limited | Alcester | 2018 |
| A.L. King (Roofing) Ltd. | Wiltshire | 1997 |
| A.L. King Roofing Merchants Limited | Melksham | 2019 |
| A.L. Mechanical Limited | Welwyn Garden City | 2023 |
| A.L. Ollerton Limited | Preston | 1994 |
| A.L. Phillips (Building Contractors) Limited | Haverfordwest | 2001 |
| A.L. Taylor & Sons Limited | Tunbridge Wells | 2003 |
| A.L. Waring Properties Ltd | Whitby | 2014 |
| A.L.B Rail Ltd | Rhydyfelin | 2017 |
| A.L.C Brickwork Limited | Cannock | 2011 |
| A.L.C Mechanical Limited | Nottingham | 2025 |
| A.L.C Property & Investments Ltd | Leven | 2025 |
| A.L.C. Fencing Limited | Barnsley | 2024 |
| A.L.C. Homes Northern Limited | Birkenhead | 2021 |
| A.L.D. Plastering Company Limited (the) | Calverton | 1974 |
| A.L.Davies Limited | London | 1963 |
| A.L.Dudley Services Limited | Swansea | 2017 |
| A.L.E.B. Property Ltd | Belper | 2026 |
| A.L.F. Electrical Management Limited | Merthyr Tydfil | 2018 |
| A.L.F. Installations Ltd | Essex, Southend On Sea | 2017 |
| A.L.Fenton Roofing Limited | Barnsley | 2014 |
| A.L.H. Gridley & Sons Limited | Sudbury | 2006 |
| A.L.K. Brickwork & Building Services Limited | Manchester | 2018 |
| A.L.K. Property Renovations Ltd | Heanor | 2011 |
| A.L.L Buildings Development Ltd | Northolt | 2025 |
| A.L.L Decorating &Property Services Ltd | Southsea | 2016 |
| A.L.L Global Wind Services Ltd | Hull | 2021 |