| A & B Carpentry & Construction Ltd | Builders | CF37 2BW | 1997 |
| A2 Interiors Ltd | Builders | CF37 4HF | 2018 |
| Acj Drylining Ltd | Builders | CF37 2RL | 2019 |
| Acm General Builder Ltd | Builders | CF37 3PR | 2008 |
| Advanced Carpentry Solutions Ltd | Builders | CF37 5BE | 2015 |
| Ajtc Interiors Ltd | Builders | CF37 5PN | 2019 |
| Alpha External Render Systems Ltd | Builders | CF37 4NX | 2014 |
| Altitude Construction Ltd | Builders | CF37 1NA | 2025 |
| Ap Worktops Ltd | Builders | CF37 2BW | 2026 |
| Arlrite Fixers Ltd | Builders | CF37 5PU | 2026 |
| Ashtoncarter Property Developments Ltd | Builders | CF38 2RS | 2019 |
| Aspire Construction & Groundworks Ltd | Builders | CF38 2RS | 2026 |
| Bds Drylining Systems Ltd | Builders | CF15 7QR | 2025 |
| Belmount Products Ltd | Builders | CF37 2BW | 2001 |
| Bishop Contractors Ltd | Builders | CF15 8LW | 2026 |
| Bma Construction South Wales Ltd | Builders | CF37 5UR | 2025 |
| Brees Construction Ltd | Builders | CF15 7QR | 2024 |
| Bricks and Morgan Ltd | Builders | CF37 3HY | 2022 |
| Brill Upvc Ltd | Builders | CF15 7QR | 2024 |
| C2 Interior Contractors Ltd | Builders | CF37 5UR | 2026 |
| Cadfan Group UK Ltd | Builders | CF15 9TU | 2024 |
| Calibre Contracting Ltd | Builders | CF37 3EY | 2003 |
| Carbis Properties Ltd | Builders | CF37 4NA | 1991 |
| Cardiff Ground Specialists Ltd | Builders | CF37 5DZ | 2019 |
| Cardiff Property Maintenance Ltd | Builders | CF15 8DX | 2023 |
| Cardiff Ready Mixed Concrete Ltd | Builders | CF15 7NT | 2006 |
| Carl Lewis Carpentry & Drylining Ltd | Builders | CF37 3EB | 2023 |
| Carpet Mine Ltd | Builders | CF37 1BN | 2026 |
| Celtic Arms Ltd | Builders | CF37 5YR | 2002 |
| Centreline Construction & Development Ltd | Builders | CF37 3HE | 2019 |
| City Energy Network Ltd | Builders | CF37 1BW | 2011 |
| Cj Fitouts Ltd | Builders | CF38 2DP | 2025 |
| Clj Drylining Ltd | Builders | CF37 3HP | 2023 |
| Cmd Projects Ltd | Builders | CF15 7QR | 2016 |
| Collins & Price Developments Ltd | Builders | CF37 4NX | 2022 |
| Copa Technical Access Ltd | Builders | CF15 8AU | 2025 |
| Cotterrall Brickwork Ltd | Builders | CF37 5PU | 2023 |
| Coupland Group Ltd | Builders | CF15 9SS | 2015 |
| Crossbuild Construction Services Ltd | Builders | CF37 2EQ | 2025 |
| D & B Concrete Pumping Ltd | Builders | CF37 2EG | 2022 |
| D S Building & Maintenance Services Ltd | Builders | CF37 2NR | 2016 |
| Dai Clem Building Services Ltd | Builders | CF37 5DN | 2020 |
| Dale Building Maintenance Ltd | Builders | CF15 7QD | 1986 |
| Davall Construction Pontypridd Ltd | Builders | CF37 3JL | 2024 |
| Davies Homes (Merthyr) Ltd | Builders | CF37 2BP | 2013 |
| Davies Homes Ltd | Builders | CF37 2BP | 1979 |
| Decaro Resin and Flooring Ltd | Builders | CF15 7SZ | 2021 |
| Envirobuild Property Solutions Ltd | Builders | CF37 2BW | 2014 |
| Erg Construct Ltd | Builders | CF38 2DE | 2021 |
| Evertherm Ltd | Builders | CF37 5YR | 2026 |
| Excell Services - Ao Ltd | Builders | CF37 2LR | 2025 |
| Fairway Estates Ltd | Builders | CF37 2BW | 2014 |
| Faraday Watt Ltd | Builders | CF37 5YR | 2025 |
| Flush Interior Design & Build Ltd | Builders | CF37 3EF | 2023 |
| Foley Site Management Ltd | Builders | CF15 8LW | 2017 |
| G & K Interior Specialists Ltd | Builders | CF37 5UR | 2018 |
| G P T Builders Ltd | Builders | CF37 5UR | 2017 |
| Gpg Cardiff Ltd | Builders | CF15 9NL | 2017 |
| Grant Hughes Ewi Specialists Ltd | Builders | CF15 7SW | 2026 |
| Harrison Building & Property Services Ltd | Builders | CF37 1EX | 2017 |
| Howe and Jones Ltd | Builders | CF15 8LW | 2020 |
| Ian Power Solutions Ips Ltd | Builders | CF37 1RW | 2015 |
| Icon Facilities Ltd | Builders | CF15 7NT | 2024 |
| Iles Renovations Property Services Ltd | Builders | CF37 4AE | 2026 |
| Infinity Plumbing Wales Ltd | Builders | CF38 2JS | 2020 |
| Integra Innovations Ltd | Builders | CF15 8ET | 2024 |
| Intelle Construction Ltd | Builders | CF37 5BE | 2013 |
| Isw & Sons Ltd | Builders | CF37 5DG | 2018 |
| Isw Fit-Out Ltd | Builders | CF37 5YR | 2019 |
| J A H Bricklayers Ltd | Builders | CF37 5YR | 2014 |
| J D Renovations & Building Services Ltd | Builders | CF15 9QS | 2021 |
| J T Molloy Ltd | Builders | CF15 8LW | 2017 |
| Jaf (Yeovil) Ltd | Builders | CF15 8EX | 2006 |
| James & Rowe Drylining Ltd | Builders | CF37 5DR | 2022 |
| Jcstructures Ltd | Builders | CF15 9PR | 2026 |
| Jcw Design & Build Ltd | Builders | CF37 4HB | 2020 |
| Jenkins & Batchelor Construction Ltd | Builders | CF37 5DD | 2019 |
| Jlb Property Services Ltd | Builders | CF15 7JL | 2023 |
| Jmg Lifts Ltd | Builders | CF15 8BW | 2014 |
| Jones Building and Contracting Ltd | Builders | CF38 2BG | 2026 |
| Just Lofts (Loft Specialists) Ltd | Builders | CF15 8LA | 2022 |
| K Riley Ltd | Builders | CF15 1HL | 2004 |
| Kathrens Energy Efficient Build Systems Ltd | Builders | CF37 4NA | 2011 |
| Kathrens Energy Ltd | Builders | CF37 4NA | 2022 |
| Keith Evans Plant & Building Ltd | Builders | CF37 1EE | 2019 |
| Kelyn Partnerships Ltd | Builders | CF37 4NA | 2026 |
| Keystone Fencing Ltd | Builders | CF38 2GF | 2026 |
| Kk Fire Protection Ltd | Builders | CF37 5AU | 2022 |
| Kls Drylining Ltd | Builders | CF37 5UR | 2023 |
| L&B Drylining Ltd | Builders | CF37 1LT | 2024 |
| L. N. W. Brickwork Ltd | Builders | CF37 2EH | 2017 |
| Lanwood Construction Ltd | Builders | CF37 2EP | 2007 |
| Laser Interior & Exterior Ltd | Builders | CF37 5EP | 2021 |
| Lc Handyman Supporting Local Communities Ltd | Builders | CF37 5DN | 2024 |
| Ldj Lifting Services Ltd | Builders | CF15 8LW | 2019 |
| Ldp Group Ltd | Builders | CF37 5BP | 2020 |
| Lema Construction Ltd | Builders | CF37 5UR | 2015 |
| Leta Engineering and Plant Co. Ltd | Builders | CF37 2BW | 1974 |
| Level-Up Reinforcement&Concrete Ltd | Builders | CF37 2BW | 2023 |
| Lewis & Perkins Ltd | Builders | CF15 8RF | 2012 |
| Lewz Property Development Ltd | Builders | CF37 3EF | 2024 |
| Leyshon Renewables Ltd | Builders | CF37 4EP | 2019 |
| Lmp Glass Ltd | Builders | CF37 5YR | 2024 |
| Lt Interiors Ltd | Builders | CF15 8AA | 2024 |
| M Kizmus Engineering Ltd | Builders | CF37 5BS | 2016 |
| Maguire Construction UK Ltd | Builders | CF37 5YT | 1998 |
| Marlan Properties Ltd | Builders | CF37 2EP | 2024 |
| Marscott Ltd | Builders | CF37 2EP | 2017 |
| Maxim Sprinkler Systems Ltd | Builders | CF37 1NY | 2017 |
| Millisun Ltd | Builders | CF37 5UR | 1999 |
| Mjc Consulting Group Ltd | Builders | CF15 8HJ | 2025 |
| Mojak Utilities Ltd | Builders | CF37 4SD | 2015 |
| Morgan Project Solutions Ltd. | Builders | CF15 9TU | 2012 |
| Msc Construction Ltd | Builders | CF37 3ND | 2011 |
| Neil Cross Formwork and Construction Services Ltd | Builders | CF37 3HD | 2021 |
| Nm Construction Management Ltd | Builders | CF37 4EX | 2025 |
| Novo Luxe Ltd | Builders | CF37 2RS | 2023 |
| Nsb Interior Systems Ltd | Builders | CF37 5SD | 2021 |
| Online Property Services UK Ltd | Builders | CF37 4EX | 2016 |
| P&G Developments Ltd | Builders | CF37 5UR | 2021 |
| Panda Solar Ltd | Builders | CF15 9EJ | 2026 |
| Paul Weeks Plant and Demolition Services Ltd | Builders | CF38 2DL | 2025 |
| Pegasus Traditional Restorations Ltd | Builders | CF15 8AA | 2018 |
| Penarth Property Maintenance Ltd | Builders | CF15 9NL | 2012 |
| Pencerrig Developments Ltd | Builders | CF37 4SB | 2007 |
| Pencoed Building Services Ltd | Builders | CF37 4AN | 2026 |
| Phd Building Ltd | Builders | CF37 1SE | 2015 |
| Phub Ltd | Builders | CF37 2SN | 2025 |
| Pk Drylining Ltd | Builders | CF37 5LD | 2023 |
| Pontypridd Ceilings Ltd | Builders | CF37 5SB | 2024 |
| Pontypridd Damproofing Ltd | Builders | CF37 5DA | 2009 |
| Porthcwlis Ltd | Builders | CF37 2SW | 2012 |
| Principle Lifting and Safety Ltd | Builders | CF37 5UR | 2016 |
| Pro Clear Construction Services Ltd | Builders | CF37 4HD | 2026 |
| Pro Landscaping & Construction Specialists Ltd | Builders | CF37 4HD | 2026 |
| Pughs Construction Ltd | Builders | CF15 8LB | 2013 |
| Pyo Property Developments Ltd | Builders | CF37 5BH | 2026 |
| Raven Construction & Renovation Services Ltd | Builders | CF15 7NT | 2023 |
| Rct Blinds Ltd | Builders | CF37 5LS | 2025 |
| Re & Dp Groundworks Ltd | Builders | CF37 2BW | 2022 |
| Red Dragon Padel Ltd | Builders | CF15 7RS | 2024 |
| Renew & Restore Ltd | Builders | CF37 2LF | 2024 |
| Renovate Developments Ltd | Builders | CF37 2NH | 2021 |
| Repair Partner Network Ltd | Builders | CF15 7QD | 2013 |
| Rescrete Ltd | Builders | CF38 2ST | 2026 |
| Resin Pro Surfacing Ltd | Builders | CF37 5HB | 2025 |
| Revive Contract Services Ltd | Builders | CF37 2DH | 2019 |
| Rh Home Installations Ltd | Builders | CF37 5YR | 2011 |
| Richard Jones Builders Ltd | Builders | CF15 8LW | 2004 |
| Right Choice Kitchens Ltd | Builders | CF15 7RB | 2017 |