| A and R Groundworks Ltd | Southampton | 2013 |
| A and R Property Wessex Ltd | Dorchester | 2025 |
| A and R Response Damp Consultancy Ltd | London | 2025 |
| A and S Building Contractors Ltd. | Shepton Mallet | 2000 |
| A and S Contractors North West Limited | Altrincham | 2025 |
| A and S Decor Limited | Blackburn | 2012 |
| A and S Drains Ltd | Brackley | 2020 |
| A and S Plumbing Services Limited | London | 2011 |
| A and S Property Maintenance (South) Ltd | Spalding | 2024 |
| A and S Property Maintenance Limited | London | 2015 |
| A and Sons Builders Ltd | Nottingham | 2025 |
| A and T Investment Group Ltd | Newcastle Upon Tyne | 2019 |
| A and T Surfacing Solutions Ltd | Rotherham | 2021 |
| A and Z GAS and Plumbing Specialist Ltd | Luton | 2020 |
| A Andrei a Ltd | Romford | 2025 |
| A Armstrong Electricians Ltd | Dumfries | 2010 |
| A Armstrong Roofing Limited | Washington | 2016 |
| A Arthur Flooring Limited | London | 2007 |
| A Austin Limited | Nottingham | 2017 |
| A Awan Consultancy Services Ltd | Reading | 2026 |
| A Axinte RO Ltd | Ilford | 2026 |
| A B Building Services Limited | Wirral | 2008 |
| A B a Commissioning Ltd | Sidcup | 2023 |
| A B Agri Services (NI) Limited | Magherafelt | 2012 |
| A B Basement Company Ltd | Sheffield | 2013 |
| A B Blackton Builders Limited | Cheltenham | 2006 |
| A B Brickworks Limited | Wakefield | 2021 |
| A B Builders (Caerphilly) Ltd | Caerphilly | 2020 |
| A B Building and Groundworks Limited | Milton Keynes | 2023 |
| A B Building Projects Limited | Sheffield | 2025 |
| A B Cairns & SON Limited | Newcastle Upon Tyne | 2021 |
| A B Carpenters (Glasgow) Limited | Glasgow | 2001 |
| A B Casa Limited | Bedford | 2025 |
| A B Ceilings (Cumbria) Ltd | Barrow-In-Furness | 2005 |
| A B Ceilings (Surrey) Limited | Tadworth | 2021 |
| A B Coating Northeast Ltd | North Shields | 2020 |
| A B Collins Brickwork Limited | Thatcham | 2005 |
| A B Completions Limited | Guisborough | 2021 |
| A B Construction & Management Ltd | Billingshurst | 2019 |
| A B Construction (Nationwide ) Ltd | Exeter | 2019 |
| A B Construction Staffordshire Ltd | Leek | 2022 |
| A B Construction SW Ltd | Southampton | 2015 |
| A B Conversions Limited | Horsham | 2015 |
| A B D Joinery Limited | Manchester | 2007 |
| A B Dack Plumbing and Heating Limited | Norwich | 2019 |
| A B Developments (Scotland) Limited | Greenock | 2014 |
| A B Developments (Yorkshire) Limited | Leeds | 2012 |
| A B Displays Limited | Leicester | 2012 |
| A B Dixey Limited | Nottingham | 2019 |
| A B Drylining Ltd | Trowbridge | 2015 |
| A B Ductwork Services Limited | Sutton Coldfield | 2020 |
| A B E C Construction Limited | Dagenham | 2011 |
| A B Electrical & Refrigeration Limited | Lincolnshire | 2004 |
| A B Electrical (Chepstow) Ltd | Chepstow | 2011 |
| A B Electrical (IW) Limited | Wootton Bridge | 2022 |
| A B Electrical Installations Ltd | Alcester | 2017 |
| A B Electrical Mechanical Services Ltd | Dorchester | 2015 |
| A B Electrical Pewsey Limited | Pewsey | 2014 |
| A B Electrical Selby Limited | Goole | 2015 |
| A B Electrical Services Limited | Nottingham | 1999 |
| A B Electrics (UK) Limited | Rushden | 2002 |
| A B Falco & SON Ltd | Suffolk | 2003 |
| A B G Specialised Flooring & Building Maintenance Limited | Barry | 2003 |
| A B GAS and Plumbing Nation Ltd | Northolt | 2025 |
| A B GBS Limited | Edgware | 2019 |
| A B Heating Solutions Ltd | Plymouth | 2016 |
| A B Heritage Roofing Limited | Leeds | 2014 |
| A B Interiors (Leeds) Limited | Leeds | 2016 |
| A B K Property (South Wales) Limited | Cardiff | 2011 |
| A B Keynes Limited | Wembley | 2024 |
| A B Kitchens & Joiners Limited | Glasgow | 2016 |
| A B L Development Limited | Sudbury | 2001 |
| A B M Jointing Ltd | Wirral | 2021 |
| A B Mcguire Limited | Cleckheaton | 2003 |
| A B Mearns Ltd. | Edinburgh | 2008 |
| A B Mechanical and Plumbing Limited | Coventry | 2018 |
| A B Piling & Underpinning Ltd | Swadlincote | 2010 |
| A B Pipelines Ltd | Torquay | 2015 |
| A B Platt Groundworks Limited | Northwich | 2016 |
| A B Plumbing & Heating (1992) Limited | Newark | 2006 |
| A B Plumbing & Heating (UK) Ltd | | 2006 |
| A B Plumbing and Heating Services Limited | Shotts | 2018 |
| A B Plumbing Limited | Droitwich | 2003 |
| A B Power Services Ltd | Doncaster | 2018 |
| A B Price Fencing Limited | Bourne End | 2007 |
| A B Projects Limited | Stafford | 2010 |
| A B Property & Development Holdings Ltd | Stafford | 2020 |
| A B Property Maintenance and Contracts Limited | Leicester | 2013 |
| A B Reinstate Ltd | Eastbourne | 2022 |
| A B Render Systems Limited | Rossendale | 2015 |
| A B Rigging Services Ltd | London | 2021 |
| A B Rogers & SON Limited | Narberth | 1997 |
| A B Roofing & Carpentry Ltd | Farnborough | 2020 |
| A B Rooftech Ltd | Barnsley | 2024 |
| A B Scape Ltd | Ilford | 2021 |
| A B Scovell Limited | Shanklin | 2000 |
| A B Security and Electrical Limited | Nuneaton | 2008 |
| A B Smith Ltd | Hockley | 2014 |
| A B Solar (Midlands) Ltd | Shepshed | 2023 |
| A B Solutions Inc Ltd | London | 2025 |