| 3CHA Ltd | Milton Keynes | 2013 |
| 3CK Limited | Wirral | 2018 |
| 3CLS Properties Limited | Edinburgh | 2023 |
| 3CM Limited | Leicester | 2025 |
| 3CPM Ltd | Bedford | 2024 |
| 3CR Property Ltd | Wellingborough | 2026 |
| 3CRINGLEMIRE Limited | Windermere | 2025 |
| 3CS Inv-Estates Ltd | Derby | 2022 |
| 3D Capital Partners Ltd | Poole | 2024 |
| 3D Carers Ltd | Basildon | 2022 |
| 3D Chestnut Limited | Bushey | 2019 |
| 3D Comfort Living Ltd | London | 2025 |
| 3D Communications Limited | Maldon | 2000 |
| 3D Contours Ltd | Chesterfield | 2018 |
| 3D Corporation Limited | Bushey | 2008 |
| 3D Engineer Limited | Altrincham | 2024 |
| 3D Estates Limited | Reading | 2003 |
| 3D Group Properties Ltd | Annesley | 2021 |
| 3D Holdings Limited | Woodford Green | 2018 |
| 3D Housing Group Ltd | Birmingham | 2020 |
| 3D Housing Ltd | Cardiff | 2024 |
| 3D Housing Solutions Ltd. | St. Helens | 2022 |
| 3D International Ltd | London | 2025 |
| 3D Investment NO 2 Limited | Bushey | 2021 |
| 3D Lets Ltd | Nottingham | 2022 |
| 3D Lipo (HQ) Ltd | London | 2017 |
| 3D Lipo Property Company Ltd | London | 2016 |
| 3D London Investments Ltd | London | 2026 |
| 3D Management and Consultancy Ltd | Peterborough | 2004 |
| 3D Management Properties Ltd | Llandudno Junction | 2020 |
| 3D OR NOT 2D Limited | Catford | 2001 |
| 3D Organisation Limited | Retford | 2003 |
| 3D Portfolio Ltd | Gerrards Cross | 2025 |
| 3D Properties (Midlands) Ltd | Worcestershire | 1985 |
| 3D Properties Investment Limited | Birmingham | 2024 |
| 3D Properties Limited | Billericay | 2021 |
| 3D Properties Management Limited | Greenhithe | 2021 |
| 3D Properties North West Limited | Bury | 2024 |
| 3D Properties NW Ltd | Rossendale | 2021 |
| 3D Property & Developments Ltd | Harrogate | 2020 |
| 3D Property (Scotland) Limited | Glasgow | 2005 |
| 3D Property Group Ltd | Sheffield | 2022 |
| 3D Property Invest Ltd. | Sutton | 2019 |
| 3D Property Investment and Management Ltd | London | 2025 |
| 3D Property Investments Limited | Penarth | 1988 |
| 3D Property Ltd | Mansfield | 2017 |
| 3D Property Management Ltd | South Shields | 2017 |
| 3D Property Services Ltd | Birmingham | 2023 |
| 3D&CO Limited | Loughborough | 2006 |
| 3D&E Ltd | Loughborough | 2025 |
| 3D4M Limited | Upminster | 2019 |
| 3DAY Weekend Limited | Stockport | 2011 |
| 3DC Properties Limited | Bristol | 2021 |
| 3DE Property Ltd | Bridgend | 2023 |
| 3DEN Limited | Westcliff-On-Sea | 2023 |
| 3DEVELOPERS Ltd | Cardiff | 2015 |
| 3DEY Property Limited | London | 2025 |
| 3DINVESTMENTS Limited | Woodford Green | 2016 |
| 3DLS Ltd | Pinner | 2025 |
| 3DM Properties Ltd | Leicester | 2021 |
| 3DM Property Ltd | Leatherhead | 2018 |
| 3DM Property Solution Limited | London | 2020 |
| 3DNEST Limited | Bishop Auckland | 2025 |
| 3DNKYS Ltd | Leicester | 2024 |
| 3DOM Real Estate Ltd | Leighton Buzzard | 2022 |
| 3DOT Property Limited | Newton Abbot | 2021 |
| 3DQ Homes Ltd | Croydon | 2025 |
| 3DQ Properties Ltd | Croydon | 2021 |
| 3DRR Ltd | London | 2024 |
| 3DS Services Ltd | London | 2020 |
| 3DSE Ltd | Bexleyheath | 2026 |
| 3DW Property Ltd | Maidstone | 2019 |
| 3E Holdings Limited | Walthamstow | 2023 |
| 3E Property Investment Ltd | London | 2020 |
| 3E Property Limited | Chesterfield | 2021 |
| 3E Property Services Limited | London | 2018 |
| 3E'S Properties Ltd | Erith | 2019 |
| 3EA Ltd | Pontyclun | 2018 |
| 3EAST Ltd | Cookstown | 2022 |
| 3ELIZ Property Emporium Ltd | Sheffield | 2025 |
| 3EU Ltd | Leeds | 2026 |
| 3EZZY Limited | Cheadle | 2024 |
| 3F Co-Operative Limited | Croydon | 2023 |
| 3F Properties Ltd | Preston | 2024 |
| 3FIVESIX Property Solutions Ltd | Milton Keynes | 2021 |
| 3FL Limited | Bradford | 2022 |
| 3FOLD Investments Ltd | Pinner | 2019 |
| 3FOLD Property Limited | London | 2025 |
| 3G Building & Construction Ltd | Salisbury | 2005 |
| 3G Investments Ltd | Hayes | 2018 |
| 3G Lettings Ltd | Hartlepool | 2022 |
| 3G Portfolio Limited | Hayes | 2020 |
| 3G Property Ltd | Hereford | 2021 |
| 3G&K Limited | Leamington Spa | 2025 |
| 3G'S Hinit Property Ltd | Derby | 2025 |
| 3G1B Investments Limited | Poole | 2016 |
| 3GA1 Property Ltd | Bedford | 2025 |
| 3GBR Limited | Kingston Upon Thames | 2024 |
| 3GC Limited | London | 2025 |
| 3GEN Properties Ltd | Oldham | 2026 |