| 360 Design Consultants Ltd | Builders | NP10 9LW | 2019 |
| A P Quick Developments Ltd | Builders | CF3 0LT | 2026 |
| Aa Aluminium Ltd | Builders | NP10 8HH | 2024 |
| Agverandas Ltd | Builders | CF3 1YA | 2023 |
| Aj Fire Ltd | Builders | CF3 1TA | 2025 |
| Akaal Kirpa Construction Ltd | Builders | CF3 3BG | 2026 |
| Al-Ko Ptr Trans&Co Ltd | Builders | CF3 0QB | 2024 |
| Allen & Sage Roofing/Building Ltd | Builders | CF3 3NP | 2021 |
| Allfit Upvc Installations Ltd | Builders | NP10 9NX | 2021 |
| Antonellisrail Ltd | Builders | CF3 0PD | 2016 |
| Aperture Build Ltd | Builders | CF3 2PU | 2021 |
| Aro Const. Ltd | Builders | NP10 9PB | 2016 |
| At Site Supervision Ltd | Builders | CF3 1RY | 2014 |
| Atamate Solutions Ltd | Builders | CF3 5EA | 2011 |
| Avanti Access Solutions Ltd | Builders | CF3 4FF | 2024 |
| B&S Exterior and Interior Group Ltd | Builders | CF3 5SJ | 2026 |
| B.C.D.L. Plastering Ltd | Builders | NP10 8FY | 2005 |
| Beckinsale-UK Ltd | Builders | CF3 0NA | 2025 |
| Best Blinds (Wales & South West) Ltd | Builders | NP10 8FY | 2019 |
| Bluefield Cwm and Phurnacite Ltd | Builders | CF3 2EJ | 2026 |
| Bluefield Land Ltd | Builders | CF3 2EJ | 2004 |
| Blues Fire & Integrated Services Ltd | Builders | CF3 2PU | 2019 |
| Blues Mechanical Ltd | Builders | CF3 2PU | 2026 |
| Brian Harries Building Ltd | Builders | CF3 4DJ | 2022 |
| Brookmead Ltd | Builders | NP10 9GJ | 2016 |
| C A Davies Ltd | Builders | CF3 6HX | 2025 |
| C James Carpentry & Construction Ltd | Builders | CF3 4AA | 2021 |
| C&M Development and Design Ltd | Builders | CF3 0FA | 2022 |
| Campo & Co Developments Ltd | Builders | CF3 5ND | 2026 |
| Cardiff Developments & Construction Ltd | Builders | CF3 0DT | 2024 |
| Cardiff Driveways & Patios Ltd | Builders | CF3 3HF | 2024 |
| Cardiff If Its Property Maintenance Ltd | Builders | CF3 0JY | 2023 |
| Cardiff Loft Boarding Ltd | Builders | CF3 4BB | 2026 |
| Cardiff Maintenance Services Ltd | Builders | CF3 1US | 2023 |
| Chapel-Oak Developments Ltd | Builders | CF3 0UJ | 2016 |
| Cifra Solutions Ltd | Builders | CF3 0LT | 2022 |
| Cityresin Ltd | Builders | NP10 8FY | 2025 |
| Cladding & Construction Ltd | Builders | CF3 5EA | 2016 |
| Crean Construction (UK) Ltd | Builders | CF3 0LT | 2017 |
| Crean Construction Ltd | Builders | CF3 0LT | 2000 |
| Csj Construction Group Ltd | Builders | CF3 0PQ | 2026 |
| Cwmderi Cyfyngedig | Builders | NP10 8LR | 2019 |
| D S Roberts Construction Ltd | Builders | CF3 4TE | 2015 |
| D.P. Tarmacadam Ltd | Builders | CF3 3BQ | 2019 |
| Das Construction Service Ltd | Builders | CF3 3BA | 2012 |
| David Williams Homes Ltd | Builders | NP10 8RR | 2018 |
| Davies Brothers (Holdings) Ltd | Builders | CF3 5EA | 2009 |
| Davies Resin Ltd | Builders | CF3 0LT | 2025 |
| Dragonfly Site Services Ltd | Builders | CF3 1SY | 2026 |
| Dynamic Development Group Ltd | Builders | CF3 6AB | 2021 |
| Ebd Steel Door Maintenance Ltd | Builders | CF3 2ER | 2023 |
| Edb (UK) Ltd | Builders | NP10 9FQ | 2014 |
| Emc Civil Engineering Ltd | Builders | NP10 8EY | 2020 |
| Fagp Trading Ltd | Builders | CF3 0JU | 2022 |
| Flow Engineering Ltd | Builders | NP10 8SP | 2011 |
| Foresthaus Ltd | Builders | NP10 8FY | 2026 |
| Gate Systems Ltd | Builders | CF3 0EF | 2017 |
| Gn Electric & Renovation Ltd | Builders | CF3 0HG | 2026 |
| Ground Force Driveways & Landscaping Ltd | Builders | CF3 3PU | 2025 |
| Gwp Construction Ltd | Builders | CF3 0LT | 2019 |
| H D Home Improvements Ltd | Builders | CF3 0HF | 2017 |
| Hamaa Developments Ltd | Builders | CF3 6HX | 2025 |
| Haus Garden Rooms Ltd | Builders | CF3 1YA | 2025 |
| Hennessey Construction Consultancy Ltd | Builders | CF3 4FG | 2020 |
| Hier Estates Ltd | Builders | CF3 5EA | 2018 |
| Hillman James Ltd | Builders | NP10 9LE | 2018 |
| Humblebrick Ltd | Builders | CF3 5EA | 2019 |
| Ions Trade & Projects Ltd | Builders | CF3 0LR | 2026 |
| J Companys Ltd | Builders | CF3 6AS | 2022 |
| J D G Building and Scaffolding Ltd | Builders | NP10 8SF | 2018 |
| J Oliver Contractors Ltd | Builders | CF3 1DW | 2012 |
| J&M Drylining Ltd | Builders | CF3 1SX | 2023 |
| J&S Builders Ltd | Builders | CF3 4FD | 2026 |
| Jab Scaffolding Access Ltd | Builders | CF3 5RY | 2022 |
| Jacksalt Construction Ltd | Builders | CF3 3BA | 2025 |
| Jg Plant & Hire Services Ltd | Builders | NP10 8SF | 2025 |
| Jjmc Consulting Ltd | Builders | NP10 9JR | 2025 |
| Jock Jones Ltd | Builders | CF3 5EA | 2024 |
| Jp Ground & Developments Ltd | Builders | CF3 1QZ | 2025 |
| Justin Pacheco Construction Ltd | Builders | CF3 0EJ | 2026 |
| Kelly Mumford Ltd | Builders | NP10 9JB | 2019 |
| Kgb Inspection Services Ltd | Builders | NP10 9NQ | 2012 |
| Kingdom Waters Ltd | Builders | NP10 9NQ | 2013 |
| Knott Construction Consultancy Ltd | Builders | CF3 5EA | 2026 |
| L & A Interiors Ltd | Builders | CF3 3BJ | 2020 |
| Latham Construction South Wales Ltd | Builders | CF3 5TZ | 2013 |
| Ldn Services Ltd | Builders | CF3 2EH | 2016 |
| Lewis and Son Construction Ltd | Builders | CF3 4BB | 2026 |
| Lft Maintenance Ltd | Builders | CF3 6XL | 1994 |
| Lk Landscapes (South Wales) Ltd | Builders | CF3 4HD | 2022 |
| Lloyds Contracts Ltd | Builders | CF3 2EX | 2009 |
| Mahiya Living Ltd | Builders | NP10 8FY | 2024 |
| Maislo Building Services Ltd | Builders | CF3 4BB | 2019 |
| Marty Junior Madden Ltd | Builders | CF3 2ET | 2018 |
| Mdb Contract Carpentry Ltd | Builders | NP10 8TR | 2018 |
| Megascope Meridian Ltd | Builders | CF3 0FG | 2022 |
| Mic Building and Property Maintaince Ltd | Builders | CF3 0AR | 2021 |
| Michael Lee Building and Carpentry Ltd | Builders | CF3 5QG | 2024 |
| Mis Cardiff Ltd | Builders | CF3 3PE | 2026 |
| N J Edinborough Building & Maintenance Ltd | Builders | CF3 5RJ | 2019 |
| N Meakin Contracts Ltd | Builders | NP10 8TU | 2009 |
| Newport Builders and Home Improvements Ltd | Builders | NP10 9EJ | 2024 |
| Nineteen 76 Ltd | Builders | CF3 5AA | 2021 |
| No1 Advanced Resin Solutions Ltd | Builders | CF3 0NY | 2026 |
| Oakleaf Building Contractors Ltd | Builders | NP10 0AA | 2021 |
| One Solution Builders Ltd | Builders | NP10 8SQ | 2021 |
| P Lane Building Services Ltd | Builders | NP10 9FA | 2022 |
| P7d Construct Ltd | Builders | NP10 8QP | 2021 |
| Parkgrove Developments Ltd | Builders | CF3 6XD | 2008 |
| Paxmund Builds Ltd | Builders | NP10 9BD | 2023 |
| Phoenix Properties (South West) Ltd | Builders | NP10 8FY | 2024 |
| Pippen Projects Contracts and Consultancy Ltd | Builders | NP10 8LJ | 2025 |
| Platinum Property Development Cardiff Ltd | Builders | CF3 6XE | 2024 |
| Port Brick Builders Cardiff Ltd | Builders | CF3 5TJ | 2024 |
| Portwest Holdings Ltd | Builders | NP10 8FY | 2022 |
| Premier Outdoor Spaces Ltd | Builders | CF3 6YY | 2025 |
| Primeguard Fire and Security Ltd | Builders | CF3 6AQ | 2024 |
| Probert & Mumford Ltd | Builders | CF3 5EA | 2005 |
| Propco Developments (Dinas Powys) Ltd | Builders | CF3 2ET | 2023 |
| R2projects Ltd | Builders | CF3 5TZ | 2026 |
| Ramzi Builders Ltd | Builders | CF3 0JJ | 2024 |
| Refrigeration and Shopfitting Services Ltd | Builders | CF3 0FL | 2025 |
| Reg Construction Ltd | Builders | CF3 5EA | 2016 |
| Regen Construction Ltd | Builders | NP10 8BD | 2022 |
| Regen Property Services Ltd | Builders | NP10 8AZ | 2023 |
| Rg Bartlett Construction Ltd | Builders | CF3 4DU | 2020 |
| Rhondda Drives & Patios Ltd | Builders | CF3 1DZ | 2025 |
| Rhp Bathroom Services Ltd | Builders | CF3 4BS | 2014 |
| Richard Kemble Contracts Ltd | Builders | CF3 2ET | 2014 |
| Richard Sutton Ltd | Builders | CF3 5EA | 2010 |
| Robinson Brickwork Cardiff Ltd | Builders | CF3 3JJ | 2023 |
| Rpduk Construction Ltd | Builders | NP10 8FY | 2025 |
| Rs Shopfitters Ltd | Builders | CF3 0FL | 2026 |
| S & D Sealants Ltd | Builders | NP10 8FY | 2002 |
| Saint Brides Specialist Cars Ltd | Builders | NP10 8SF | 2021 |
| Sasquatch Services Ltd | Builders | CF3 0FA | 2017 |
| Sh Expert Construction Ltd | Builders | NP10 9PD | 2021 |
| Sj Workforce Ltd | Builders | NP10 8FY | 2018 |
| Skyline Facade Services Ltd | Builders | CF3 0DP | 2026 |
| Smoke Control Services Ltd | Builders | CF3 2PZ | 1992 |
| Soma Insulation Ltd | Builders | CF3 3DL | 2016 |
| Srg Group Ltd | Builders | CF3 3AN | 2015 |
| Stonemason Developments Ltd | Builders | CF3 6UY | 2025 |
| Strand Energy & Engineering Ltd | Builders | NP10 8FY | 2014 |
| Stuart Leach Interiors Ltd | Builders | NP10 9NP | 2015 |
| Swanage Maintenance Ltd | Builders | CF3 0BT | 2019 |
| Taylors Construction Cardiff Ltd | Builders | CF3 0AW | 2026 |
| Thermal-Tek Solutions Ltd | Builders | NP10 8FY | 2014 |
| Thorne Rainwater Services Ltd | Builders | NP10 8BN | 2026 |
| Tri-Smith Homes Ltd | Builders | CF3 5TZ | 2006 |