| 629 Clydach Road Ltd | Builders | SA7 0AJ | 2017 |
| A & L Bricklaying Services Ltd | Builders | SA8 3BE | 2018 |
| A P Architecture and Planning Ltd | Builders | SA7 0AJ | 2010 |
| A1 Resin Ltd | Builders | SA7 9FP | 2020 |
| Abertawe Sectional Buildings Ltd | Builders | SA6 8QF | 2013 |
| Affect Ability Ltd | Builders | SA6 5AS | 2017 |
| Aj Bespoke Carpentry Ltd | Builders | SA7 0AJ | 2024 |
| Aldeco Ltd | Builders | SA7 0AJ | 2018 |
| All 4 You Contractors Ltd | Builders | SA6 7BP | 2017 |
| Alltwen Building & Maintenance Ltd | Builders | SA8 4HU | 2017 |
| Alpha Upvc Ltd | Builders | SA8 4QQ | 2019 |
| Amarok Building Services Ltd | Builders | SA7 0AJ | 2022 |
| Arthur Reginald Construction Ltd | Builders | SA7 9FS | 2023 |
| Asw Property Services Ltd | Builders | SA7 9FS | 2000 |
| Atf Transformations Ltd | Builders | SA6 6TA | 2024 |
| Atr Property Services Ltd | Builders | SA7 9LE | 2025 |
| Aurora Energy Consulting Ltd | Builders | SA7 9LA | 2020 |
| Avid Construction Ltd | Builders | SA7 9BD | 2004 |
| Avit Structures Ltd | Builders | SA6 7LT | 2017 |
| B&C Building (Swansea) Ltd | Builders | SA7 9FP | 2026 |
| B. D. Welding Ltd | Builders | SA8 4HU | 2002 |
| Ballard Homes Ltd | Builders | SA6 8EX | 1997 |
| Barrie Scully Building Contractors Ltd | Builders | SA8 4HU | 2013 |
| Bayside Building Ltd | Builders | SA6 8HG | 2026 |
| Bedrich Homes Ltd | Builders | SA7 0AJ | 2024 |
| Bespoke Construction & Plastering Ltd | Builders | SA7 0AJ | 2024 |
| Bml Interiors Ltd | Builders | SA6 8BP | 2025 |
| Br Joinery Ltd | Builders | SA7 9LA | 2022 |
| Broadstone Construction (Swansea) Ltd | Builders | SA7 0AJ | 2012 |
| C & R Carpentry Ltd | Builders | SA6 5RL | 2012 |
| C&J Frame Ltd | Builders | SA6 6AU | 2026 |
| C.A. Roberts Builders Ltd | Builders | SA8 4NX | 2016 |
| Calon Construction Ltd | Builders | SA7 0AJ | 2014 |
| Caradog Landscapes Ltd | Builders | SA7 0AJ | 2016 |
| Carter & Co Associates Ltd | Builders | SA8 3AS | 2006 |
| Castell Civils Ltd | Builders | SA7 0AP | 2024 |
| Castell Construction Ltd | Builders | SA7 0AP | 2019 |
| Caswell Interiors Ltd | Builders | SA6 8QQ | 2008 |
| Cdaa Services Ltd | Builders | SA7 9EQ | 2023 |
| Ceo.Welding Ltd | Builders | SA6 6QA | 2023 |
| Cjwr Construction Ltd | Builders | SA7 0AJ | 2024 |
| Compton Developments Ltd | Builders | SA6 8EX | 1973 |
| Construction Repairs Ltd | Builders | SA8 4HU | 2010 |
| Cowling Holdings Ltd | Builders | SA7 0AJ | 2020 |
| Cps Construction Ltd | Builders | SA6 8EB | 2021 |
| Craftsmen Building & Property Services Ltd | Builders | SA6 6PL | 2003 |
| Crest Ceilings & Partitions Ltd | Builders | SA7 9FS | 2011 |
| Crystal Clear Pools Ltd | Builders | SA6 8PL | 2014 |
| Cursio Construction Ltd | Builders | SA7 0AJ | 2017 |
| Cwjet Ltd | Builders | SA6 6EZ | 2025 |
| Cygnus Holdings (Cardiff) Ltd | Builders | SA7 0AJ | 2018 |
| D B Property Enterprises Ltd | Builders | SA8 4SX | 2024 |
| D.G. Moses Plant Hire Ltd | Builders | SA8 4HU | 1997 |
| Darmont Construction Ltd | Builders | SA7 0AJ | 2018 |
| Davan Construction Ltd | Builders | SA7 9LA | 2016 |
| Davies Construction and Groundworks Ltd | Builders | SA8 3JE | 2023 |
| Davies Groundworks and Construction Ltd | Builders | SA8 4RN | 2026 |
| Dcw Project Services Ltd | Builders | SA7 0AJ | 2018 |
| Devois Interiors Ltd | Builders | SA6 6QW | 2014 |
| Dex-Renovations Ltd | Builders | SA6 6LR | 2023 |
| Dhwd Ltd | Builders | SA7 9LA | 2009 |
| Direct Tile Warehouse Ltd | Builders | SA6 8EX | 1997 |
| Dmd Facades Ltd | Builders | SA7 9WP | 2022 |
| Dmd Roofing and Building Ltd | Builders | SA7 0AJ | 2026 |
| Door System Installations Ltd | Builders | SA7 9LA | 2009 |
| Dprice Builders Ltd | Builders | SA8 4LU | 2019 |
| Dragon Sealants Ltd | Builders | SA7 9QB | 2015 |
| Dulais Valley Developments Ltd | Builders | SA7 9FS | 2017 |
| Dyfed Developments Spv 1 Ltd | Builders | SA7 0AP | 2022 |
| Dyfed Developments Spv 2 Ltd | Builders | SA7 0AP | 2022 |
| E.R. Ryan Services Ltd | Builders | SA6 7BP | 2017 |
| E4 Renov8 Ltd | Builders | SA7 9EQ | 2024 |
| Eaton Fencing Specialists Ltd | Builders | SA6 8QQ | 2011 |
| Echo Wizzardary Ltd | Builders | SA6 7BP | 2017 |
| Efficient Living Solutions UK Ltd | Builders | SA7 9LA | 2023 |
| Encom Building Services Ltd | Builders | SA7 9FP | 2023 |
| Er4 Ltd | Builders | SA6 6AQ | 2025 |
| Era Construction & Civil Engineering Ltd | Builders | SA6 5AA | 2022 |
| Everyday Maintenance Services Ltd | Builders | SA6 6LT | 2026 |
| Fairtrade Windows and Doors Ltd | Builders | SA6 6QZ | 2023 |
| Fernlee Estates Ltd | Builders | SA7 9NL | 1982 |
| First Fix Interiors Ltd | Builders | SA8 4LX | 2026 |
| Foundry & Co Construction Ltd | Builders | SA7 0AJ | 2026 |
| G R D Ltd | Builders | SA8 3JP | 2005 |
| Gee Utilities Services Ltd | Builders | SA7 9HQ | 2017 |
| Gex Carpentry Ltd | Builders | SA7 0AJ | 2009 |
| Green Dragon Properties (Swansea) Ltd | Builders | SA7 9GA | 2024 |
| Greenview Home Improvements Ltd | Builders | SA7 9AP | 2026 |
| Groesffordd Homes Ltd | Builders | SA7 9FS | 2019 |
| Growbrick Developments Ltd | Builders | SA6 6AH | 2004 |
| Gwyr Developments Ltd | Builders | SA7 0AJ | 2020 |
| H I S Group Ltd | Builders | SA6 5RT | 2024 |
| H&W Building Ltd | Builders | SA6 6DH | 2025 |
| Hancock Carpentry Ltd | Builders | SA7 0NJ | 2025 |
| Hartland Builders Ltd | Builders | SA8 3DA | 2015 |
| Hassan Moallem Ltd | Builders | SA6 6LY | 2024 |
| Hastlefree Ltd | Builders | SA7 0AJ | 2003 |
| Haven Home Builders Ltd | Builders | SA7 9FS | 2024 |
| Hengoed Davies Ltd | Builders | SA7 9FG | 2007 |
| Ian Davies Investments Ltd | Builders | SA7 9LA | 2020 |
| Ian Davies Plant Ltd | Builders | SA7 9LA | 1996 |
| Indigo Rises Ltd | Builders | SA6 7BP | 2018 |
| J Carpentry Ltd | Builders | SA7 0AJ | 2023 |
| J Evans Services Ltd | Builders | SA6 7BP | 2018 |
| J&P Building Contractors Ltd | Builders | SA6 8LA | 2023 |
| J&R Carpentry & Building Ltd | Builders | SA7 0AJ | 2020 |
| Jasara Property Ltd | Builders | SA6 7LA | 2021 |
| Jc Levels Ltd | Builders | SA7 9FS | 2026 |
| Jenkinsons Brickwork & Building Ltd | Builders | SA7 0HP | 2023 |
| Jj Construct Consult Ltd | Builders | SA8 4HU | 2025 |
| Jlr Construction & Engineering Ltd | Builders | SA7 9FS | 2021 |
| Johnson, Hall & Company Ltd | Builders | SA7 9LA | 1984 |
| Jon Ball Plastering & Renovations Ltd | Builders | SA7 9LA | 2023 |
| Jonah Ward Services Ltd | Builders | SA6 7BP | 2016 |
| K & J Contracting Ltd | Builders | SA6 5TB | 2024 |
| K & N Construction Ltd | Builders | SA6 5TB | 2015 |
| K D Crabb Ltd | Builders | SA6 5AN | 2015 |
| K&S Building Innovation Ltd | Builders | SA6 8AL | 2025 |
| Karina Lane Construction Ltd | Builders | SA7 9FP | 2019 |
| Kaurcommerical Construction Ltd | Builders | SA6 7EA | 2026 |
| L.G Endurance Ltd | Builders | SA7 0AJ | 2023 |
| Launch Brickwork Ltd | Builders | SA8 4HU | 2006 |
| Lions Maintenance Ltd | Builders | SA7 9QX | 2025 |
| Lms (Wales) Ltd | Builders | SA7 9FS | 2014 |
| Lynch Scaffolding System Ltd | Builders | SA7 0AJ | 2017 |
| Madden & Winkett Developments Ltd | Builders | SA6 6PL | 2007 |
| Martin Taffetsauffer Building & Civil Engineering Contractors Ltd | Builders | SA7 9LA | 2006 |
| Mcgowan Bros Ltd | Builders | SA6 8PJ | 2024 |
| Miers Mechanical Fitter Ltd | Builders | SA6 6QW | 2024 |
| Millstones Estates Ltd | Builders | SA7 9LA | 2026 |
| Moore Drylining & Shopfitting Ltd | Builders | SA7 0AJ | 2024 |
| Morstone Build Co Ltd | Builders | SA7 0AJ | 2025 |
| Nas-Architect Ltd | Builders | SA7 0AJ | 2016 |
| New Home Quality Control Ltd | Builders | SA7 9EH | 2018 |
| Newport Developments Spv 1 Ltd | Builders | SA7 0AP | 2022 |
| Nigel Thomas Plant Hire Ltd | Builders | SA6 6NX | 2002 |
| Omega Timber Frame Ltd | Builders | SA8 4SL | 2023 |
| Paul Jones Fencing Ltd | Builders | SA8 4HU | 2008 |
| Paul Thomas and Son Builders Ltd | Builders | SA7 0AJ | 2014 |
| Pefkos Ltd | Builders | SA7 0AJ | 2002 |
| Pentre Efail Ltd | Builders | SA8 4HU | 2020 |
| Perez Rail & Civils Ltd. | Builders | SA6 7BP | 2016 |
| Performance Bunker Liner Ltd | Builders | SA7 9LA | 2026 |
| Pg (Building Contractors) Ltd | Builders | SA7 9EQ | 2011 |
| Powder Monkeez Ltd | Builders | SA8 4EN | 2020 |
| Premier Windows Direct Ltd | Builders | SA6 8PZ | 2018 |
| Project One Design and Management Ltd | Builders | SA7 9LA | 2011 |
| Quantum Home Improvement Ltd | Builders | SA6 7EQ | 2025 |
| R Carpentry Ltd | Builders | SA7 0AJ | 2023 |
| R Cullen Interiors Ltd | Builders | SA6 6JU | 2024 |