| A Build Above Ltd | Epsom | 2018 |
| A Build Above the Rest Limited | Wolverhampton | 2024 |
| A Build Contractor Ltd | West Drayton | 2025 |
| A Build Decor Ltd | Wigan | 2023 |
| A Build Limited | Birmingham | 2018 |
| A Builder (Netley) Limited | Southampton | 2007 |
| A Builders Team Limited | London | 2015 |
| A Building Company Cornwall Ltd | Lostwithiel | 2025 |
| A Building Construction Limited | London | 2014 |
| A Building Services Ltd | South Ruislip | 2020 |
| A Building Solution Limited | Norwich | 2015 |
| A Bull Groundworks Ltd | Port Talbot | 2025 |
| A Burden Plumbing & Heating Ltd. | Kidlington | 2008 |
| A Burgoyne (Electrical Contractors) Limited | | 1977 |
| A Burke Painting Contractors Ltd | Birkenhead | 2023 |
| A Burns Tiling Limited | Old Skelmersdale | 2008 |
| A Burrows Services Limited | Neston | 2014 |
| A Burton Builders Limited | Norfolk | 2007 |
| A Butler Roofing & General Building Ltd | Middlesex | 2025 |
| A Butterworth Joinery & Construction Ltd | Halifax | 2016 |
| A Buxey Electrical & Data Ltd | Berkshire | 1997 |
| A C Anslow & Sons Ltd | Folkestone | 2019 |
| A C B Electric's Ltd | Wolverhampton | 2020 |
| A C Banks Limited | Lanark | 2003 |
| A C Bennett Construction Limited | Wisbech | 2015 |
| A C Bonaire Limited | Smethwick | 2014 |
| A C Brickwork (South East) Limited | Ipswich | 2013 |
| A C Brown Electrical Services Ltd | Ironbridge | 2020 |
| A C Builders Services Ltd | Sheffield | 2010 |
| A C Building (Peterborough) Limited | Peterborough | 1994 |
| A C Building and Construction Limited | Stalybridge | 2007 |
| A C Building and Maintenance Limited | Tadley | 2013 |
| A C Burton Site Services Ltd | Altrincham | 2021 |
| A C C Air Conditioning Limited | Leigh On Sea | 2005 |
| A C C Tiling Limited | Banchory | 2013 |
| A C Commercial Developments Ltd | Rotherham | 2016 |
| A C Concepts Limited | Newton-Le-Willows | 2010 |
| A C Construction (Colchester) Limited | Colchester | 2008 |
| A C Construction (Rugby) Limited | Rugby | 2013 |
| A C Construction and Carpentry Ltd | Exeter | 2020 |
| A C Contracts (Codsall) Ltd | Kingswinford | 2011 |
| A C Cooling and Refrigeration Limited | Fareham | 2013 |
| A C Cumbria Ltd | Penrith | 2019 |
| A C Davis Electrical Ltd | Chatham | 2015 |
| A C Decorators Limited | Bolton | 2012 |
| A C Development (Cheshire) Ltd | Sandbach | 2016 |
| A C Development Services Ltd | Heswall | 2025 |
| A C Developments (Cumbria) Ltd | Penrith | 2020 |
| A C Developments (Lincoln) Limited | Lincoln | 2017 |
| A C Developments (SW) Limited | Ilminster | 2012 |
| A C Electric (Bristol) Ltd | Bristol | 2023 |
| A C Electric Services Ltd | Sale | 2019 |
| A C Electrical & Generators Limited | Leeming Bar | 2023 |
| A C Electrical & Security Limited | Rhyl | 2008 |
| A C Electrical (North Wales) Ltd | Llandudno Junction | 2016 |
| A C Electrical (North) Limited | Dukinfield | 2006 |
| A C Electrical (North) One Limited | Dukinfield | 2007 |
| A C Electrical (South) Ltd | Biggin Hill | 2000 |
| A C Electrical (Tamworth) Limited | Tamworth | 2007 |
| A C Electrical Bolton Ltd | Bolton | 2012 |
| A C Electrical Frome Ltd | Bath | 2026 |
| A C Electrical Services Essex Limited | Chelmsford | 2019 |
| A C Electrics (Barrow) Ltd | Barrow-In-Furness | 2022 |
| A C Electrics N.I. Ltd | Lisburn | 2025 |
| A C Enright Joinery and Building Limited | Sidcup | 2003 |
| A C F I Limited | Harrow | 2018 |
| A C Fleming Electrical Limited | Halifax | 2009 |
| A C Florin Ltd | Welling | 2018 |
| A C Future Limited | Callington | 2020 |
| A C G Property Services Limited | Brighton | 2001 |
| A C Gilson Properties Ltd | Wedmore | 2025 |
| A C Glazing Ltd | Birmingham | 2014 |
| A C Green (Builder) Ltd | Hullbridge | 2013 |
| A C H Scaffolding Ltd | Grimsby | 2015 |
| A C Hilldrup Construction Ltd | Hereford | 2022 |
| A C Holdings (Midlands) Limited | Stourbridge | 2020 |
| A C J Electrical Services Ltd | Sidcup | 2010 |
| A C J Installations Limited | Winslow | 2016 |
| A C Joinery (Amble) Limited | Amble | 2011 |
| A C K Electrical Services Ltd | Sheffield | 2012 |
| A C K L Services Limited | Treorchy | 2024 |
| A C King Construction Ltd | Aylesbury | 2016 |
| A C Konnect Ltd | Southport | 2017 |
| A C L Windows Limited | Swindon | 2009 |
| A C L Work Services Ltd | Solihull | 2015 |
| A C Lawrie Builders Limited | Kidderminster | 2016 |
| A C Lime Plastering & Rendering Ltd | Stevenage | 2026 |
| A C Lister Electrical Ltd | Powys | 2020 |
| A C Lloyd Homes Limited | Warwick | 1963 |
| A C Lofts Limited | Northampton | 2014 |
| A C M Electrical Limited | Devon | 2004 |
| A C M Heat Services Ltd | Blackburn | 2022 |
| A C Macnee Joinery Ltd | Chapelton | 2023 |
| A C Mahoney Electrical Services Ltd | Hereford | 2018 |
| A C Maintenance Ltd | Uxbridge | 2017 |
| A C Martin Limited | Warmley | 2006 |
| A C Mayles and SON Roofing Contractors Ltd | Hastings | 2015 |
| A C Mini Piling and Foundations Limited | Manchester | 2016 |
| A C N Flooring Limited | Billericay | 2005 |
| A C Obrijanu Fixing Ltd | Thornton Heath | 2019 |