| 477 Management Ltd | Consett | 2026 |
| 4780 Ltd | Hartley Wintney | 2021 |
| 47ARCH Design and Build Ltd | Birmingham | 2025 |
| 47HSWOT Limited | Bristol | 2022 |
| 47SD Ltd | Glannau Dyfrdwy | 2026 |
| 48 Conduit Developments Limited | Huddersfield | 2018 |
| 48 Green Street Project Ltd | Gravesend | 2026 |
| 48 Swindon RD Ltd | Cheltenham | 2013 |
| 48 the Mall Limited | Harrow | 2014 |
| 48-49 North Street Taunton Developments Limited | London | 2022 |
| 48.3 Scaffold Design (Leeds) Limited | Northampton | 2009 |
| 481 Contracts Ltd | Bishop'S Stortford | 2022 |
| 485 Construction Co Ltd | London | 2025 |
| 48FOUR Contract Services Ltd | Croydon | 2018 |
| 49 Bilton Towers Limited | London | 2015 |
| 49 CR4 Ltd | Purley | 2021 |
| 49 Elmgrove Road Limited | Weybridge | 2013 |
| 49 Mowlem Street Limited | London | 2014 |
| 4:30 Limited | London | 2024 |
| 4A Commercial Management Consultants Limited | Harrow | 2019 |
| 4A Engineering and Technology Limited | Tottenham Hale | 2017 |
| 4A Expert Ltd | London | 2024 |
| 4A Merle Property Services Ltd | Watford | 2026 |
| 4A Ventures Limited | Blackburn | 2019 |
| 4A4V Construction Ltd | Gravesend | 2021 |
| 4ACRE Safety and Training Limited | Barnstaple | 2022 |
| 4AR Construction Ltd | London | 2022 |
| 4AV Limited | Nottingham | 2023 |
| 4B (Nottingham) Groundworks Limited | Nottingham | 2020 |
| 4B Building Limited | Stowmarket | 2021 |
| 4B Harmony Limited | Fraserburgh | 2018 |
| 4B Homes Limited | Henfield | 2026 |
| 4B Promotion Limited | Taunton | 2017 |
| 4B Renovations Limited | London | 2016 |
| 4B Services Limited | Accrington | 2020 |
| 4B2 Construction Ltd | Wokingham | 2016 |
| 4BASE Construction Ltd | Southall | 2014 |
| 4BE Limited | Carrickfergus | 2023 |
| 4BEMS Ltd | Dunstable | 2020 |
| 4BFC Developments Limited | Nottingham | 2008 |
| 4BROS Electrical Solutions Ltd | Basildon | 2021 |
| 4BROTHERSPROPERTY Ltd | Warmley | 2018 |
| 4BUILD Ltd | London | 2013 |
| 4C - Jamestown Road Ltd | London | 2022 |
| 4C Access (UK) Limited | Deeside | 2017 |
| 4C Developments Limited | London | 2013 |
| 4C Homes & Developments Ltd | Wolverhampton | 2019 |
| 4C Hotels (2) Limited | London | 2011 |
| 4C Interiors Limited | London | 2016 |
| 4C Minories 2 Ltd | London | 2018 |
| 4C Minories 3 Ltd | London | 2018 |
| 4C Minories 4 Ltd | London | 2018 |
| 4C Projects Limited | London | 2013 |
| 4C Rocket Developments Limited | London | 2021 |
| 4C'S Solutions Limited | Swindon | 2022 |
| 4CARE Facilities Management Limited | Glasgow | 2012 |
| 4CAST Property Solutions Ltd | Brentwood | 2020 |
| 4CELL Electrical Ltd | Cardiff | 2013 |
| 4CONSTRUCT Ltd | Oxford | 2020 |
| 4CORE Solutions Ltd | Pudsey | 2024 |
| 4CS Building Solutions Ltd | London | 2024 |
| 4CS Global Academy Ltd | Bristol | 2025 |
| 4CUBED Developments Ltd | Reigate | 2024 |
| 4D Builders (NI) Limited | Ballymena | 2021 |
| 4D Builders and Design Ltd | Southampton | 2019 |
| 4D Building Solutions Ltd | St Columb | 2021 |
| 4D Civil Engineering Surveying Ltd | Plymouth | 2004 |
| 4D Civils Ltd | Manchester | 2024 |
| 4D Construction Ltd | Dunstable | 2020 |
| 4D Construction Management Services Ltd | Redruth | 2012 |
| 4D Construction Services Ltd | Whaley Bridge | 2025 |
| 4D Contract Flooring Limited | Aylesbury | 2011 |
| 4D Electrical Limited | Billericay | 2023 |
| 4D Electrical Services Ltd | Hull | 2018 |
| 4D Garden Retreats Ltd | Wakefield | 2025 |
| 4D Heating & Plumbing Ltd | Reading | 2013 |
| 4D Home Improvements Limited | Peterborough | 2008 |
| 4D Home Solutions Ltd | Aylesbury | 2022 |
| 4D Joinery (North East) Limited | Bishop Auckland | 2017 |
| 4D Kitchens and Bedrooms Ltd | Keynsham | 2026 |
| 4D Maintenance Services Limited | Staffordshire | 2003 |
| 4D Planning Services Ltd | High Wycombe | 2024 |
| 4D Properties (N.I.) Limited | Ballymena | 2015 |
| 4D Property Services Limited | Derby | 2019 |
| 4D Property Solutions Limited | High Wycombe | 2010 |
| 4D Roofing Limited | Dover | 2013 |
| 4D Structures Limited | Radlett | 2013 |
| 4D Tiling Ltd | High Peak | 2024 |
| 4D Venture Limited | Nottingham | 2015 |
| 4DCURVE Ltd | London | 2012 |
| 4DD Limited | Barnet | 2020 |
| 4DEVELOPMENTS Ltd | Tunbridge Wells | 2025 |
| 4DS Construction Limited | Basingstoke | 2016 |
| 4DVISUALS Limited | Hayes | 2026 |
| 4E Builders Ltd | Redhill | 2024 |
| 4E Offshore Ltd | Margate | 2024 |
| 4E Property Services Ltd | Dagenham | 2025 |
| 4E Services Ltd | London | 2024 |
| 4EIGHTYSEVEN Electrical Ltd | Birmingham | 2020 |
| 4ELECTRICS Ltd | London | 2024 |