| A and P Building Ltd | Builders | SA11 2TA | 2025 |
| A To Z Roofing & Property Maintenance Ltd | Builders | SA11 3BH | 2026 |
| A1 Garden Room Solutions Ltd | Builders | SA11 5HH | 2026 |
| A1 Industrial Roofing & Cladding Specialists Ltd | Builders | SA10 7EG | 2026 |
| Acn Construction Ltd | Builders | CF44 9EH | 2023 |
| Adk Drylining Ltd | Builders | CF44 6UW | 2026 |
| Adrian Powell Developments Ltd | Builders | SA10 7DT | 2006 |
| Advanced Brickwork Contractors Ltd. | Builders | SA10 9PN | 2011 |
| Affordable Quality Windows Ltd | Builders | SA10 7HP | 2020 |
| Ak Jones Property Management Ltd | Builders | SA11 4LR | 2026 |
| Akw Fabrications Ltd | Builders | SA11 1DQ | 2021 |
| Alb Property Services Ltd | Builders | SA11 2PF | 2019 |
| Albannie Internals Ltd | Builders | CF44 0HR | 2026 |
| Amd Construction South Wales Ltd | Builders | SA11 3BH | 2024 |
| Anderson Building & Maintenance Ltd | Builders | SA11 2AY | 2025 |
| Applefray Ltd | Builders | SA10 7AJ | 2019 |
| Art Construct Ltd | Builders | SA10 6FS | 2007 |
| Ascend Exterior Solutions Ltd | Builders | SA10 9NH | 2026 |
| Ascragga Rooch Infrastructure Projects Ltd | Builders | SA11 1DJ | 2019 |
| Aspect Groundworks Ltd | Builders | SA11 5NF | 2023 |
| Bailey Thomas Shutters Ltd | Builders | SA10 7DN | 2024 |
| Bailey'S Blinds Neath Ltd | Builders | SA10 7DN | 2021 |
| Baileys Blinds Swansea Ltd | Builders | SA10 7DN | 2025 |
| Bedrooms, Kitchens and Bathrooms Ltd | Builders | CF44 8LE | 2015 |
| Bhl Fix Ltd | Builders | CF44 8BZ | 2026 |
| Brennan Design & Developments Ltd | Builders | CF44 0DB | 2023 |
| Bristol Building Contracts Ltd | Builders | CF44 9RD | 2015 |
| Building Neads Ltd | Builders | CF44 6DU | 2005 |
| C & C Wood Ltd | Builders | CF44 9YU | 2021 |
| C & P Building Contractors Ltd | Builders | SA10 7DR | 2022 |
| C & R Solutions Wales Ltd | Builders | SA10 7EL | 2024 |
| C Lewis Construction Ltd | Builders | CF44 9HS | 2017 |
| C. Moses Roofing Ltd | Builders | SA11 4BG | 1982 |
| C.A.J. Fielding Engineering Services Ltd | Builders | SA11 3XF | 2013 |
| Caer Hendy Gardens Ltd | Builders | SA10 6AY | 2005 |
| Caled Bricklaying Ltd | Builders | SA11 5LB | 2025 |
| Capricorn Windows Ltd | Builders | CF44 8RN | 2003 |
| Carl Hendy Ltd | Builders | SA11 1LF | 2013 |
| Cavi Clear Ltd | Builders | SA11 1DQ | 2018 |
| Cavibuild Ltd | Builders | SA11 2NS | 2022 |
| Celtic Damproofing Ltd | Builders | CF44 0ED | 2001 |
| Cfj Developments Ltd | Builders | SA10 6EJ | 2024 |
| Chris Evans Building Contractors Ltd | Builders | CF44 0YS | 2011 |
| Cjc Estates Ltd | Builders | CF44 0EZ | 2012 |
| Cjc Plant Hire Ltd | Builders | CF44 0EZ | 2026 |
| Clad9 Ltd | Builders | CF44 6TP | 2023 |
| Cladding Technology Ltd | Builders | SA10 7HQ | 2023 |
| Clearleap Ltd | Builders | CF44 9SX | 2026 |
| Clh Brickwork Ltd | Builders | SA11 4AQ | 2026 |
| Clm Windows & Doors Ltd | Builders | CF44 8DN | 2020 |
| Cm Nest Ltd | Builders | SA11 3RN | 2025 |
| Cocosteli Construction Ltd | Builders | CF44 6YE | 2025 |
| Complete Estates Maintenance Ltd | Builders | CF44 9QT | 2019 |
| Concrete Structures & Floors Ltd | Builders | SA10 7DR | 2012 |
| Construction Group Ltd | Builders | SA10 6LR | 2016 |
| Core Seal Ltd | Builders | SA11 4HF | 2017 |
| Creative Paving (Tvs) Ltd | Builders | SA11 3BH | 2022 |
| Crown Property & Roofing Specialist Ltd | Builders | SA11 3BH | 2024 |
| Crynant Home Improvements & Conservatories Ltd | Builders | SA10 8PX | 2018 |
| Cva Building Ltd | Builders | CF44 6SN | 2007 |
| Cynon Contract Services Ltd | Builders | CF44 0SG | 2023 |
| Cyris Plant Operations Ltd | Builders | SA11 5EY | 2023 |
| D H Designer Home Improvements Ltd | Builders | SA11 2SL | 2026 |
| D M Caviell Services Ltd | Builders | CF44 0RQ | 2018 |
| D&A Carpentry Specialist Ltd | Builders | CF44 0AJ | 2003 |
| D&A Connections Ltd | Builders | CF44 9AW | 2018 |
| Dare Building Services Ltd | Builders | CF44 6NF | 2025 |
| Dawell Ltd | Builders | CF44 9RU | 2023 |
| Dca Construction Ltd | Builders | CF44 9DG | 2026 |
| Derwen Aggregates Ltd | Builders | SA10 6BL | 1995 |
| Dgd Civils Ltd | Builders | CF44 9DS | 2022 |
| Diamondps Ltd | Builders | SA10 8ET | 2026 |
| Dlis Ltd | Builders | SA11 3NT | 2019 |
| Dragonstone Construction Ltd | Builders | SA11 1DT | 2026 |
| Dunamis Builders Ltd | Builders | SA11 3AY | 2024 |
| Eco Connect Network Ltd | Builders | SA10 9EB | 2020 |
| Elias Carpentry Ltd | Builders | SA10 6DP | 2019 |
| Ers Networks Ltd | Builders | CF44 6BF | 2025 |
| Eurotech Balcony Systems Ltd | Builders | CF44 9UP | 2018 |
| Evagrass Ltd | Builders | CF44 6DA | 2021 |
| Exemplar Brickwork Ltd | Builders | SA11 4BG | 2026 |
| Ezirend Ltd | Builders | CF44 7LR | 2017 |
| Fairleap Ltd | Builders | CF44 9NS | 2012 |
| Fletcher Groundworks & Civils Ltd | Builders | CF44 6DQ | 2026 |
| Full Moon (Aberaman) Ltd | Builders | CF44 8EZ | 2024 |
| Furwood Developments Ltd | Builders | CF44 9NY | 2019 |
| G & C Groundworks & Construction Ltd | Builders | SA11 3NX | 2018 |
| Gap Internals Ltd | Builders | CF44 8BZ | 2015 |
| Gce Engineering Ltd | Builders | CF44 6TX | 2014 |
| Gdj Construction Management and Property Maintenance Ltd | Builders | CF44 6RE | 2025 |
| Glamorgan Services Ltd | Builders | SA10 7HQ | 1997 |
| Gofod Cartref Ltd | Builders | SA10 8HP | 2026 |
| Golding Qs Services Ltd | Builders | SA10 7RZ | 2017 |
| Highgate Bespoke Renovations Ltd | Builders | SA10 6HA | 2025 |
| Highline Rigging Ltd | Builders | CF44 0TJ | 2026 |
| Hm Services Contractors Ltd | Builders | CF44 9JA | 2020 |
| Hughes First Step Digger Ltd | Builders | CF44 9NF | 2020 |
| Hywel Llewellyn Plant Hire Ltd | Builders | CF44 9NY | 2006 |
| Ibm Brickwork Ltd | Builders | SA11 1YA | 2020 |
| Icc (Sw) Ltd | Builders | SA10 8AW | 2026 |
| Integrated Fencing Ltd | Builders | CF44 8DL | 2020 |
| J G Furlong Ltd | Builders | CF44 9NY | 2012 |
| J G Jones (Kitchen Installations) Ltd | Builders | SA11 3RL | 2004 |
| J M Evans Building Ltd | Builders | SA11 2PA | 2025 |
| J V Formwork Ltd | Builders | SA10 6EH | 2026 |
| J. D. C. Developments Ltd. | Builders | SA11 4AN | 1999 |
| J.G. Hale Construction Ltd | Builders | SA11 1NJ | 1999 |
| James Shopfitting Ltd | Builders | SA10 9DH | 2022 |
| Jason Wright Ltd | Builders | SA10 9LD | 2023 |
| Jc Resin Ltd | Builders | SA11 3BH | 2023 |
| Jce Maintenance Ltd | Builders | CF44 9BS | 2022 |
| Jones’S Property Solutions Ltd | Builders | SA11 1AN | 2026 |
| Jordan Pryor Carpentry Ltd | Builders | CF44 8DW | 2024 |
| Justin Bailey Ltd | Builders | SA11 3PJ | 2019 |
| K & H Groundworks Ltd | Builders | CF44 0AG | 1998 |
| K & J Property Solutions Ltd | Builders | SA10 9DF | 2025 |
| K&D Europe Constructions Ltd | Builders | SA10 6RS | 2023 |
| K&M Building Solutions Ltd | Builders | SA11 2RD | 2020 |
| Kad Design Projects Ltd | Builders | CF44 9HR | 2007 |
| Kap Carpentry Ltd | Builders | SA10 6PE | 2024 |
| Karaway Windows & Doors Ltd | Builders | CF44 0LA | 2022 |
| Krp Carpentry & Building Ltd | Builders | SA10 6UP | 2022 |
| Krp Renovations Ltd | Builders | SA10 6UP | 2023 |
| Kyle Davies Building Contractor Ltd | Builders | SA11 5AF | 2018 |
| Laken Construction Ltd | Builders | SA11 3LN | 2025 |
| Laken Group Ltd | Builders | SA11 3HW | 2025 |
| Ldeh Ltd | Builders | SA10 6JE | 2022 |
| Loft Pro Cardiff Ltd | Builders | CF44 8EZ | 2014 |
| Longmeadow Partnership Ltd | Builders | CF44 9QF | 2003 |
| Lpj Civils & Groundworks Ltd | Builders | SA11 3NX | 2020 |
| Lr Drywall Finishers Ltd | Builders | SA10 8BE | 2023 |
| Luxury Home Improvements Ltd | Builders | CF44 8RS | 2015 |
| M Colcombe Interiors Ltd | Builders | CF44 0BU | 2011 |
| M Morgan Maintenance & Building Ltd | Builders | CF44 8NT | 2021 |
| M Williams Building & Plastering Ltd | Builders | CF44 0US | 2025 |
| M. Burley Consultants Ltd | Builders | SA11 3HX | 2013 |
| Marshall May Ltd | Builders | SA10 8BE | 2011 |
| Mattix Installations Ltd | Builders | CF44 8BL | 2025 |
| Michael Thomas Building & Roofing Ltd | Builders | SA11 3BH | 2024 |
| Mike Evans Building & Plastering Contractors Ltd | Builders | CF44 9LG | 2012 |
| Mj Property Maintenance Services Ltd | Builders | CF44 8PP | 2025 |
| Mjr Contracting Ltd | Builders | SA11 4BG | 2026 |
| Mlc Gardens Ltd | Builders | CF44 6DQ | 2020 |
| Modu-Lite Build Ltd | Builders | SA11 1LE | 2025 |
| Modu-Lite Data Ltd | Builders | SA11 1LE | 2025 |
| Modular Building Structure Group Ltd | Builders | SA11 3AY | 2026 |
| Monster Heating Ltd | Builders | SA10 6FW | 2020 |
| Morgan Rendering and Plastering Ltd | Builders | CF44 0RT | 2023 |
| Mrg Lofts and Construction Ltd | Builders | CF44 0HW | 2026 |
| Mww Property Renovation Ltd | Builders | CF44 0DS | 2025 |