| 3t Safety and Training Ltd | Builders | CF5 1QL | 2023 |
| A G Developments 1979 Ltd | Builders | CF5 6TR | 2003 |
| A H J Maintenance Ltd | Builders | CF5 4NF | 2024 |
| A J Renovate Ltd | Builders | CF5 6XL | 2024 |
| A. & N. Lewis Ltd | Builders | CF5 4AQ | 1987 |
| A.J.M Property Developments Improvements Ltd | Builders | CF5 3BW | 2025 |
| Able Roofing & Construction Ltd | Builders | CF5 1AR | 2003 |
| Abney Construction Ltd | Builders | CF71 7AB | 2003 |
| Accru Scenic Construction Ltd | Builders | CF5 6FB | 2015 |
| Acoustic Ceilings Ltd | Builders | CF5 1HL | 1995 |
| Affordable Renovations and Maintenance Ltd | Builders | CF5 1NA | 2019 |
| Agm Brickwork & Stonework Ltd | Builders | CF5 6EW | 2003 |
| Am & Sons Carpentry Ltd | Builders | CF5 1BJ | 2025 |
| Amor Galvanizing Services Ltd | Builders | CF5 3AU | 2021 |
| Anthony O'Sullivan Ltd | Builders | CF71 7AB | 2004 |
| Asguard Ltd | Builders | CF5 1BJ | 2005 |
| Assure Gas Ltd | Builders | CF5 1BL | 2022 |
| Atlantic Dwellings Ltd | Builders | CF5 6LS | 2006 |
| Autolex Ltd | Builders | CF71 7JG | 2007 |
| B & W Builders Ltd | Builders | CF5 2RW | 2014 |
| Bennett Brickwork Ltd | Builders | CF5 4RP | 2019 |
| Black Dragon Engineering Ltd | Builders | CF5 1BL | 2019 |
| Blu-Tect Construction Ltd | Builders | CF71 7DP | 2026 |
| Bohanna Carpentry Ltd | Builders | CF5 1HP | 2015 |
| Bright Vue Ltd | Builders | CF5 4SB | 2012 |
| Broodryk & Sons Developments Ltd | Builders | CF5 6EZ | 2019 |
| Bryce Building Solutions Ltd | Builders | CF5 1BL | 2021 |
| Bus Shelters Ltd. | Builders | CF71 7GQ | 1984 |
| Bwj Developments Ltd | Builders | CF5 1BL | 2024 |
| C L M Construction Ltd | Builders | CF71 7DP | 1990 |
| C.Greening Carpentry & Property Maintenance Ltd | Builders | CF71 7AB | 2020 |
| Cardiff Consulting Ltd | Builders | CF5 2LR | 2022 |
| Cardiff Drilling Ltd | Builders | CF5 4NJ | 2025 |
| Cardiff Electrical & Construction Ltd | Builders | CF5 2PX | 2014 |
| Care Environmental Surveying Ltd | Builders | CF5 1DG | 2017 |
| Cdm Environmental Ltd | Builders | CF5 4TU | 2017 |
| Celtic Precast Ltd | Builders | CF5 2DP | 2021 |
| Chamberlain Electrical & Technical Services Ltd | Builders | CF71 7BA | 2015 |
| Chapman Construction Cardiff Ltd | Builders | CF5 3HP | 2026 |
| Cjc Scenic Services Ltd | Builders | CF71 7QW | 2018 |
| Clarity Construction Group Ltd | Builders | CF5 2RR | 2026 |
| Clear Construct Ltd | Builders | CF71 7AB | 2012 |
| Clive Edwards Contracts Ltd | Builders | CF71 7NL | 2013 |
| Cml Brickwork & Stonework Ltd | Builders | CF5 6EW | 2020 |
| Cosyglaze Ltd | Builders | CF5 3PT | 2026 |
| Cronan Property Ltd | Builders | CF5 3JD | 2026 |
| Custom Construction and Civils Ltd | Builders | CF5 9GR | 2024 |
| Customised Luxury Furniture Ltd | Builders | CF5 4DX | 2015 |
| Delivago Ltd | Builders | CF5 1PF | 2022 |
| Denrose Projects Ltd | Builders | CF71 7US | 2007 |
| Dockham Mechanical Ltd | Builders | CF5 2DN | 2017 |
| Dul Gal Ltd | Builders | CF5 4PR | 2026 |
| Edward North Ltd | Builders | CF5 2DP | 2015 |
| Emery Building Ltd | Builders | CF5 1LJ | 2013 |
| Emery Contractors Ltd | Builders | CF5 1LJ | 1995 |
| Eryr Properties Ltd | Builders | CF71 7RZ | 2021 |
| Evolve Home Renovations Ltd | Builders | CF5 3SF | 2023 |
| F B C Interior Design Ltd | Builders | CF5 2AH | 2008 |
| Facebrick Builders Ltd | Builders | CF5 3LL | 2021 |
| Fg Scenic Construction Ltd | Builders | CF5 6FB | 2025 |
| Fox Fire Systems Ltd | Builders | CF5 4RU | 2022 |
| Galaxy Shopfitting Ltd | Builders | CF5 6JA | 2000 |
| Gallaghers Contractors Services Ltd | Builders | CF71 7AB | 2009 |
| Gaya Holdings Ltd | Builders | CF5 1BJ | 2022 |
| Geach Contractors Ltd | Builders | CF5 5PA | 2026 |
| Glamorgan Fixing Company Ltd | Builders | CF5 3PR | 2016 |
| Glamorgan White Lining Ltd | Builders | CF71 7LT | 1999 |
| Greening Construction Ltd | Builders | CF71 7AB | 2023 |
| Gwyn G Jones & Sons Ltd | Builders | CF71 7RN | 2002 |
| Hancock’S Design&Construction Ltd | Builders | CF5 4DF | 2025 |
| Hg&Rg Ltd. | Builders | CF71 7EB | 2009 |
| Hira Holdings Ltd | Builders | CF5 1BJ | 2018 |
| Housedale Ltd | Builders | CF5 1PR | 2016 |
| Houston Shutters Ltd | Builders | CF71 7AB | 2021 |
| I.W.F Roofing & Cladding Services Ltd | Builders | CF5 3RN | 2011 |
| Insideout Trading Ltd | Builders | CF71 7HD | 2021 |
| Itgel Ltd | Builders | CF5 4PR | 2026 |
| Ivory Bros Builders Ltd | Builders | CF5 6TT | 2019 |
| J B Construction & Carpentry Wales Ltd | Builders | CF5 1JR | 2020 |
| J West Plastering Ltd | Builders | CF5 4RU | 2022 |
| Jeg Building Solutions Ltd | Builders | CF5 3BX | 2011 |
| Jjb Steel and Lifting Ltd | Builders | CF5 4SU | 2023 |
| Jvj Roofing and Building Ltd | Builders | CF5 1BJ | 2025 |
| Jw Partnership (Jwp) Ltd | Builders | CF5 1BW | 2018 |
| Kalimantan Construction Ltd | Builders | CF5 6SU | 2019 |
| Keystone Consulting Engineers Ltd | Builders | CF71 7EE | 2012 |
| Klt Property & Maintenance Specialists Ltd | Builders | CF71 7RT | 2024 |
| Kuno Contractors Ltd | Builders | CF5 5BD | 2022 |
| L A Emery Building Services Ltd | Builders | CF5 5DD | 2022 |
| Ledley Engineering Ltd | Builders | CF71 7PF | 1971 |
| Legion Developments Ltd | Builders | CF5 1BL | 2025 |
| Lekker Services Ltd | Builders | CF5 1BZ | 2020 |
| Lewis Homes ( Meadow View) Ltd | Builders | CF71 7EE | 2022 |
| Lewis Homes (South Wales) Ltd | Builders | CF71 7EE | 2005 |
| Lrh Construction Ltd | Builders | CF5 1BG | 2025 |
| Luxurious Renovations Ltd | Builders | CF5 3HP | 2025 |
| Luxury Driveways & Patios Ltd | Builders | CF5 1BJ | 2025 |
| Lydair (Commissioning) Ltd | Builders | CF5 1EL | 2011 |
| M R M & Sons Building & Roofing Ltd | Builders | CF5 2DJ | 2012 |
| M&L Construction (Cardiff) Ltd | Builders | CF5 6EY | 2009 |
| M.J. Sullivan Plasterers Ltd | Builders | CF71 7AB | 2006 |
| Maqueline Builders Ltd | Builders | CF5 2NJ | 2009 |
| Mark Godwin Bricklaying Contractors Ltd | Builders | CF71 7AB | 2002 |
| Matthew David Property Services Ltd | Builders | CF71 7AB | 2023 |
| Mike Emery Construction Services Ltd | Builders | CF5 4TA | 2017 |
| Mjd Facades Ltd | Builders | CF5 3PS | 2025 |
| Mn Projects Co. Ltd | Builders | CF5 2RW | 2026 |
| Mts Building Maintenance Ltd | Builders | CF5 3HU | 2026 |
| Nac Building Ltd | Builders | CF5 6EY | 2026 |
| Nj Hughes Construction Ltd | Builders | CF5 4TZ | 2018 |
| Nsj Property Developments Ltd | Builders | CF5 4RX | 2024 |
| Oakstone Home Renovations Ltd | Builders | CF5 4EE | 2026 |
| Olympus Pods Ltd | Builders | CF5 3PP | 2026 |
| P & P Builders Ltd | Builders | CF5 3DF | 2004 |
| P.A. Stockton Brickwork Contractors Ltd | Builders | CF71 7AB | 2001 |
| Pattern Drives & Walls Ltd | Builders | CF5 1HU | 2019 |
| Peterson-Super-Ely Development Ltd | Builders | CF71 7AZ | 2025 |
| Plwca Developments Ltd | Builders | CF71 7UL | 2007 |
| Pm Properties 1 Ltd | Builders | CF71 7PB | 2026 |
| Premier Windows & Doors Ltd | Builders | CF5 5TD | 2018 |
| Project 12 Construction Ltd | Builders | CF5 6TQ | 2019 |
| Psb Construction Ltd | Builders | CF5 4EX | 2019 |
| Raa Group Ltd | Builders | CF5 1BJ | 2025 |
| Rhinas Brickwork Ltd | Builders | CF5 4UJ | 2019 |
| S.A.S. Building Contractors Ltd | Builders | CF5 2QT | 1994 |
| Safety First Contractors Ltd | Builders | CF5 2DP | 2025 |
| Sasha Wilsher Ltd | Builders | CF5 1GZ | 2018 |
| Shopfitting & Building Maintenance Ltd | Builders | CF5 2NJ | 2002 |
| Skyline Construction Works Ltd | Builders | CF5 5EY | 2025 |
| Skylines Property Management Ltd | Builders | CF5 1GY | 2020 |
| Solstice Holdings Ltd | Builders | CF5 4TB | 2025 |
| Srb Build Ltd | Builders | CF5 1JD | 2026 |
| Standby Construction Ltd | Builders | CF71 7NT | 2005 |
| Svd Sparklean Ltd | Builders | CF5 5QX | 2024 |
| Sw Building Inspections Ltd | Builders | CF5 6HS | 2026 |
| T.K.T. Ltd | Builders | CF5 2BB | 2003 |
| Taylord Property Services Ltd | Builders | CF5 5RD | 2024 |
| Tha Bit Ltd | Builders | CF5 3EN | 2021 |
| The Performance Company (Cardiff) Ltd | Builders | CF71 7PF | 2007 |
| The Premier Group Rms Ltd | Builders | CF5 5TD | 2018 |
| Time Matters Fire Protection Ltd | Builders | CF5 5HH | 2026 |
| Tobermore Paving Developments Ltd | Builders | CF5 1BJ | 2026 |
| Tpc Architectural Ltd | Builders | CF71 7PF | 2014 |
| Trivett Contracting Ltd | Builders | CF71 7AB | 2024 |
| Ty Laurel Ltd | Builders | CF71 7EG | 2020 |
| Uc Property Solutions Ltd | Builders | CF5 3RD | 2026 |
| Urban Recreation Ltd | Builders | CF71 7QJ | 2026 |
| Vale Holdings Sw Ltd | Builders | CF71 7QW | 2023 |
| Vale Home Improvements Ltd | Builders | CF5 6EY | 2026 |
| Valley Dragon Sprinklers Ltd | Builders | CF5 1JJ | 2025 |