| A a Decorators Limited | Ramsgate | 2010 |
| A a Developments Cornwall Limited | Truro | 2018 |
| A a Drains Ltd | Dartford | 2021 |
| A a Electrical (East Anglia) Ltd | Ipswich | 2002 |
| A a Electrical Contractors (Solway) Limited | Maryport | 2011 |
| A a Fencing Limited | Sidcup | 2005 |
| A a Gardner & Sons Limited | Sale | 2008 |
| A a GAS & FIX Ltd | Sheffield | 2024 |
| A a Glazing (Bristol) Limited | Bristol | 1995 |
| A a Group UK Holdings Limited | London | 2018 |
| A a Guest Rooms Ltd | London | 2021 |
| A a Hawkins Building & Renovations Ltd | Cheltenham | 2025 |
| A a Homes (Yorkshire) Ltd | Sheffield | 2010 |
| A a Homes and Housing (Exchange Court) Limited | Croydon | 2014 |
| A a Homes and Housing (Liverpool ) Limited | London | 2018 |
| A a Homes and Housing (Portsmouth) Limited | London | 2018 |
| A a Homes Ltd | | 2000 |
| A a Installations Limited | Nottingham | 1998 |
| A a Integrated Limited | Paisley | 2022 |
| A a Kear Electrical Services Limited | Lydney | 2012 |
| A a Leisures Ltd | Birmingham | 2017 |
| A a M Construction Limited | London | 2017 |
| A a Macdonald Joinery & Building Contractor Limited | Spean Bridge | 2009 |
| A a Machin Electrical Services Ltd | Doncaster | 2016 |
| A a Massen Trading Limited | King'S Lynn | 2013 |
| A a MAX Ltd | Romford | 2019 |
| A a Mechanise Limited | Ipswich | 2022 |
| A a Miller & SON Ltd | Londonderry | 2005 |
| A a Molyneux Builders Limited | Liverpool | 2005 |
| A a P Groundworks Limited | Ruislip Manor | 2004 |
| A a Pike Construction Limited | Somerton | 2003 |
| A a S Building Solutions Ltd | Birmingham | 2025 |
| A a S T Limited | Whitstable | 2008 |
| A a Scaffolding & Roofing Ltd | Chelmsford | 2022 |
| A a Scaffolds Limited | Church | 2018 |
| A a Steel Fixing Ltd | Cheadle | 2025 |
| A a Tiling Ltd | Birmingham | 2020 |
| A a Top Construction Limited | Enfield | 2015 |
| A a Wind Services Ltd. | Cleethorpes | 2017 |
| A Aaran Ltd | London | 1997 |
| A Abercrombie Limited | Eye | 2014 |
| A Addicott Plumbing and Heating Services Limited | Crediton | 2006 |
| A Ahmed Construction Ltd | Stirling | 2025 |
| A Alexander Builders Limited | Godalming | 2017 |
| A Alexander Tiling Limited | Colchester | 2013 |
| A Allen Construction Ltd | Barningham | 2016 |
| A Allen Electrical Ltd | Chard | 2013 |
| A Alpha Construction Limited | West Bromwich | 2025 |
| A Alwaked Construction Ltd | Cardiff | 2023 |
| A and a Dean Contracting Limited | Rossendale | 2016 |
| A and a Plumbing Solutions Ltd | London | 2021 |
| A and a Rendering Limited | Bromley | 2023 |
| A and a Webb Limited | Abingdon | 1999 |
| A and C Building Services ( Midlands ) Limited | Kenilworth | 2013 |
| A and C Building Contractors (SCO) Ltd | Lochgilphead | 2019 |
| A and C E Developments Ltd | Preston | 2016 |
| A and C Engineering (Yorkshire) Limited | Doncaster | 2006 |
| A and C Scaffolding Services Ltd | Herne Bay | 2022 |
| A and D Electrical Services Limited | Cleethorpes | 2003 |
| A and D Safety Netting Limited | Edmonton | 2019 |
| A and D Sanders Bros Limited | Cheshire | 2005 |
| A and D W Development Limited | Braintree | 2025 |
| A and E Joinery Limited | Birmingham | 2009 |
| A and E Property Doctor Ltd | Cromer | 2023 |
| A and F Electrical Essex Limited | Hornchurch | 2024 |
| A and F Services (Twickenham) Limited | Twickenham | 2010 |
| A and G Fencing and Building Maintenance Ltd | Southampton | 2010 |
| A and G Interiors Ltd | Sheffield | 2017 |
| A and G Setherton Limited | South Molton | 2002 |
| A and H Bricklaying Limited | Plymouth | 2021 |
| A and H Dick Limited | Kilmarnock | 2014 |
| A and H Electrical Solutions Limited | Eastbourne | 2010 |
| A and H Investment (Building) Limited | Colchester | 2023 |
| A and H Investment (Hire) Limited | Colchester | 2024 |
| A and H Investment (Holdings) Limited | Colchester | 2023 |
| A and I Developments Limited | Wokingham | 2020 |
| A and J Flooring Ltd | London | 2021 |
| A and J Land Management Ltd | Frome | 2018 |
| A and J Plastering Services Ltd | Barry | 2022 |
| A and K Construction & Cargo Ltd | London | 2026 |
| A and K Home Improvements Limited | Alresford | 1986 |
| A and K Interiors Ltd | London | 2013 |
| A and K Maloney Ltd | Lancashire | 2001 |
| A and K Plumbing and Heating Limited | Bristol | 2014 |
| A and K Plumbing and Maintenance Ltd | Hadleigh | 2025 |
| A and L Construction Services Limited | Wisbech | 2016 |
| A and L Decorators Limited | Guildford | 2018 |
| A and M Brickwork Contractors Limited | Coventry | 2019 |
| A and M Brickwork Limited | Bicester | 2026 |
| A and M Construction Services Ltd | Wolverhampton | 2025 |
| A and M Developments (South West) Limited | Taunton | 2020 |
| A and M Engineering Inc Limited | Morden | 2011 |
| A and M Refurb Ltd. | Bideford | 2018 |
| A and M Tarways Engineering Limited | Bury St Edmunds | 1999 |
| A and P Building Ltd | Neath | 2025 |
| A and P Decor Limited | Thornton Cleveleys | 2019 |
| A and P Garage Doors Limited | Crookham Village | 2020 |
| A and P Site Supervision Limited | Newton Abbot | 2007 |
| A and R Construction Yorkshire Ltd | Leeds | 2025 |
| A and R Decor Services Ltd | Brighton | 2019 |