| A to B Contracts & Flooring Ltd | Rainham | 2017 |
| A to B Decorators London Ltd | East Grinstead | 2019 |
| A to B Glass & Glazing Limited | Finchley | 1999 |
| A to B Lift Ltd | Brentford | 2014 |
| A to B MEN Transport Ltd | Milton Keynes | 2016 |
| A to B Painting & Decorating Ltd | London | 2025 |
| A to B Plumbing, Heating & Tiling Ltd | Wrexham | 2022 |
| A to B Property Refurbish Limited | London | 2015 |
| A to B Traffic Management Ltd | Bury St. Edmunds | 2025 |
| A to BEE Property Developments Limited | Bury | 2026 |
| A to BEE Property Holdings Limited | Bury | 2026 |
| A to Z (Glass & Glazing) Company Limited | Waltham Abbey | 2002 |
| A to Z Adorn Build Ltd | Gravesend | 2018 |
| A to Z Affordable Construction Ltd | London | 2024 |
| A to Z Bespoke Kitchens Ltd | Hemel Hempstead | 2012 |
| A to Z Blinds Shutters and Joinery Ltd | Runcorn | 2019 |
| A to Z Building and Groundworks Limited | Southampton | 2018 |
| A to Z Building Construction Ltd | London | 2023 |
| A to Z Building Contractors Ltd | Hemel Hempstead | 2012 |
| A to Z Building Maintenance and Services Ltd | London | 2020 |
| A to Z Building Services Limited | Sheffield | 2016 |
| A to Z Building Works Limited | Birmingham | 2018 |
| A to Z Cleaning Master Ltd | London | 2021 |
| A to Z Construction (Southern) Ltd | Waterlooville | 2023 |
| A to Z Construction (UK) Limited | Louth | 2009 |
| A to Z Construction Solutions Limited | Edgware | 2012 |
| A to Z Constructions Solutions Limited | Hemel Hempstead | 2017 |
| A to Z DBS Ltd | London | 2025 |
| A to Z Decoration Limited | Leeds | 2025 |
| A to Z Design and Glass Ltd | London | 2019 |
| A to Z Developer Ltd | London | 2022 |
| A to Z Electrical and Home Renovations Ltd | King'S Lynn | 2024 |
| A to Z Electrical Services Limited | Manchester | 2021 |
| A to Z Elite GAS Services Limited | Leeds | 2021 |
| A to Z Energy Solutions Ltd | Royston | 2021 |
| A to Z External Solutions Ltd | Royston | 2025 |
| A to Z GAS Heating Plumbing & Building Services Ltd | Slough | 2020 |
| A to Z Glazing Solutions Ltd | Redhill | 2012 |
| A to Z Group Services Limited | Ramsgate | 2025 |
| A to Z Heating & Plumbing Services Ltd | London | 2016 |
| A to Z Home Improvement Builders Ltd | Luton | 2024 |
| A to Z Home Improvements (Luton) Limited | Luton | 2024 |
| A to Z Homes Ltd | Slough | 2017 |
| A to Z House Solutions Ltd | Birmingham | 2024 |
| A to Z Interior Design and Creation Ltd | Nottingham | 2025 |
| A to Z Interior Design Ltd | London | 2023 |
| A to Z Kitchens & Bedrooms Ltd | Slough | 2024 |
| A to Z London Construction Ltd | London | 2023 |
| A to Z London Properties Ltd | Luton | 2025 |
| A to Z Metal Roofing and Cladding Limited | London | 2023 |
| A to Z Plant Hire Limited | Reigate | 2011 |
| A to Z Plumbing & Building Ltd | Aylesbury | 2019 |
| A to Z Plumbing and Drainage Ltd | Oxford | 2025 |
| A to Z Properties (Northwest) Limited | Liverpool | 2024 |
| A to Z Property Solutions Ltd | Reading | 2021 |
| A to Z Refurb Specialists Ltd | East Grinstead | 2016 |
| A to Z Roofing and Building Limited | London | 2023 |
| A to Z Sign and Blinds Ltd | Dagenham | 2019 |
| A to Z Stone Repairs Limited | London | 2007 |
| A to Z Your Sign & Design Ltd | London | 2023 |
| A to Zeee Construction Ltd | Ilford | 2014 |
| A Todd & Co Limited | Newmilns | 2015 |
| A Toner Limited | Llandudno | 2013 |
| A Toner Upvc Specialist Ltd | Basildon | 2017 |
| A Tonkin Roofing Services Cornwall Ltd | Penzance | 2024 |
| A Topi Construction Ltd | Loughborough | 2026 |
| A Topi Construction Ltd Ltd | Loughborough | 2026 |
| A Tori Construction Ltd | London | 2021 |
| A Torn Construction Limited | Grimsby | 2006 |
| A Torres Ltd | Manchester | 2019 |
| A Total Plumbing and GAS Services Ltd | Birmingham | 2011 |
| A Touch of Class Decorating Ltd | Cheltenham | 2026 |
| A Touch of Colour Decorators Limited | Uxbridge | 2018 |
| A Touch of Frost Ltd | Rushden | 2010 |
| A Touch of GAS Ltd | Bathgate | 2015 |
| A Touch of Glass (Yorkshire) Ltd | Ossett | 2015 |
| A Touch of Glass and Glazing Limited | Cwmbran | 2022 |
| A Touch of Glass Hampshire Limited | Portsmouth | 2018 |
| A Touch of Glass Limited | Chelmsford | 2016 |
| A Touch of Glass Warwickshire Ltd | Leamington Spa | 2016 |
| A Town Projects Ltd | Rye | 2020 |
| A Trade Property Services Ltd | London | 2026 |
| A Traylor & Sons Limited | Stockport | 2003 |
| A Trembath Plant, Groundworks and Haulage Contractors Limited | Tonypandy | 2015 |
| A TRU Maker Construction Limited | Hayes | 2018 |
| A Truscott Carpentry Ltd | Truro | 2019 |
| A Tsangaris & Sons Ltd | Waltham Cross | 2017 |
| A Tucker Electrical Ltd | Hatherleigh | 2022 |
| A Tula TM Ltd | London | 2019 |
| A Turkington Bricklaying Ltd | Newtownards | 2013 |
| A Turner Electrical Limited | Chinley | 2020 |
| A Turnock Limited | Macclesfield | 2016 |
| A Tutton Building Services Limited | Swanley Village | 2015 |
| A Twist of Somerset Ltd | Bridgwater | 2026 |
| A Tysoe Electrical Services Limited | Northampton | 2016 |
| A Tyson & Sons Ltd | Seascale | 2007 |
| A U Homes Ltd | Rugby | 2025 |
| A U P (SW) Limited | Torquay | 2006 |
| A U Roofing & Building Services Ltd | Ramsgate | 2004 |
| A UCE Construction Ltd | London | 2025 |