| A & V Installations Ltd | Uttoxeter | 2017 |
| A & V Insulation Ltd | Warlingham | 2019 |
| A & V Kanaris Investments Limited | Cheadle | 1980 |
| A & V King Ltd | Sleaford | 2020 |
| A & V Norfolk Ltd | Northampton | 2025 |
| A & V Premium Ltd | Leeds | 2024 |
| A & V Tasou Properties Ltd | Scunthorpe | 2013 |
| A & W Construction & Sons Ltd | Ilkeston | 2011 |
| A & W Construction Limited | Worthing | 2008 |
| A & W Developments (Southern) Ltd | Hove | 2024 |
| A & W Developments Limited | Tunbridge Wells | 1998 |
| A & W Electrical Co. (Glasgow) Ltd. | Glasgow | 2005 |
| A & W Electrical Services Limited | Merseyside | 2007 |
| A & W Irving Limited | Langholm | 2021 |
| A & W Joinery Limited | Chester | 2004 |
| A & W Management Ltd | Ilford | 2019 |
| A & W Plumbing & Heating Limited | Dalry | 2008 |
| A & W Properties Limited | Tunbridge Wells | 1998 |
| A & W Property Solutions Ltd | Crewe | 2016 |
| A & W Solution Electrical Ltd | London | 2019 |
| A & W South West Developers Limited | Exeter | 2005 |
| A & Y Building Works Ltd | London | 2014 |
| A & Y Construct Limited | Melksham | 2015 |
| A & Y Constructions Ltd | London | 2022 |
| A & Y F SOU Ltd | Wembley | 2015 |
| A & Y Fiting Ltd | Enfield | 2012 |
| A & Y Fitting Ltd | Wembley | 2015 |
| A & Y Joinery Limited | Abingdon | 2006 |
| A & Z Builders Limited | Romford | 2024 |
| A & Z Developer Limited | Birmingham | 2023 |
| A & Z Electrical Limited | Keighley | 2021 |
| A & Z Heating Solutions Ltd | Leeds | 2025 |
| A & Z Property Maintenance Ltd | Sheffield | 2019 |
| A &L Paving 2009 Limited | Northampton | 2009 |
| A &R Contracting Ltd | Frome | 2010 |
| A &R House Solutions Ltd | Solihull | 2025 |
| A &Z Buiding Solution Limited | Bedford | 2025 |
| A + L Architecture Studio Limited | Hitchin | 2009 |
| A - Class Environmental Ltd | Stanford Le Hope | 2018 |
| A - Klass Carpentry and Joinery Ltd | Bromley | 2009 |
| A - P Roofing and Guttering Limited | Accrington | 2023 |
| A - TEC Developments Limited | Hastings | 2009 |
| A - Z Lighting Limited | Ruislip | 2015 |
| A - Z Property Care Ltd | London | 2025 |
| A -Team Building Services Limited | London | 2019 |
| A . Dalgleish Property Services Limited | Ryton | 2026 |
| A . K . Complete Services Ltd | Westcliff-On-Sea | 2024 |
| A . R . Electrical Services Ltd | Farnborough | 2024 |
| A . Wright Services Ltd | Glasgow | 2022 |
| A .L .Plumbing and Heating (Cheshire) Limited | Macclesfield | 2015 |
| A 1 Construction (PVT) Ltd | Chertsey | 2019 |
| A 1 Consulting Engineers Limited | Blackburn | 2006 |
| A 1 FIX Limited | Rochford | 2019 |
| A 1 Glass Company Limited | Kilmarnock | 1973 |
| A 1 Heating & Plumbing Ltd | London | 2016 |
| A 1 Radon Limited | Coventry | 2000 |
| A 101 London Limited | London | 2016 |
| A 12 Electrical & Technical Limited | Basildon | 2003 |
| A 2 B Access Limited | Sheffield | 2017 |
| A 2 B Coatings Ltd | Fareham | 2017 |
| A 2 B Refurbish Limited | Hampton | 2022 |
| A 2 B Whitelining Solutions Ltd. | Farnborough | 2016 |
| A 2 Z Best Building Works Ltd | Coventry | 2024 |
| A 2 Z Building Ltd | London | 2016 |
| A 2 Z Developments North West Ltd | Manchester | 2023 |
| A 2 Z Electricals (UK) Limited | | 2006 |
| A 2 Z Flooring Solutions Ltd | Orpington | 2016 |
| A 2 Z Housing Solutions Ltd | Iver | 2020 |
| A 2 Z Installations Systems Ltd. | London | 2016 |
| A 2 Z Kitchen and Bedrooms Ltd | Hayes | 2013 |
| A 2 Z Lifting Ltd | Aylesbury | 2025 |
| A 2 Z New Builds Ltd | Luton | 2017 |
| A 2 Z Plumbing Ltd | London | 2022 |
| A 4 Aerials Limited | Tonbridge | 2015 |
| A 5 Star Property Services Ltd | Chatham | 2021 |
| A 55 Landscaping Limited | Holywell | 2023 |
| A : M Electrical Systems Limited | Accrington | 2003 |
| A a & S Properties Limited | | 2004 |
| A a a Scaffold Limited | Stourbridge | 1998 |
| A a a Scaffold Yorkshire Ltd | Bridlington | 2014 |
| A a Abbey Roofing & Building Contractors Ltd | Swansea | 2011 |
| A a Abdulwahid Limited | London | 2025 |
| A a Adams Limited | Kemsing | 2004 |
| A a B Electrical and Plumbing Contractors Ltd | Purley | 2002 |
| A a BAH Limited | London | 2019 |
| A a Beer Limited | Bideford | 1958 |
| A a Bespoke Installations Ltd | Barnet | 2024 |
| A a Bradley Builders Limited | Witney | 2012 |
| A a Buckingham Limited | Rushden | 2011 |
| A a Builders Manchester Limited | Cheadle | 2017 |
| A a Building Services Limited | Ilford | 1997 |
| A a C Carmen Ltd | London | 2019 |
| A a C Renewables & Plumbing Limited | Oban | 2013 |
| A a Carpentry & Builders Limited | Aldershot | 2017 |
| A a Collins Electrical Limited | London | 2017 |
| A a Contracting Services Ltd | London | 2025 |
| A a Cooling Limited | Solihull | 2006 |
| A a Cooper Ltd | Keston | 2013 |
| A a Cunningham Limited | Scarborough | 2013 |
| A a D Plumbing Ltd | Didcot | 2014 |