| A and P Building Ltd | Builders | SA11 2TA | 2025 |
| A Bull Groundworks Ltd | Builders | SA12 6RE | 2025 |
| A To Z Roofing & Property Maintenance Ltd | Builders | SA11 3BH | 2026 |
| A1 Garden Room Solutions Ltd | Builders | SA11 5HH | 2026 |
| Acs Industrial Cladding Ltd | Builders | SA12 6PF | 2016 |
| Action Property Maintenance Ltd | Builders | SA12 8AD | 2011 |
| Ak Jones Property Management Ltd | Builders | SA11 4LR | 2026 |
| Akw Fabrications Ltd | Builders | SA11 1DQ | 2021 |
| Alb Property Services Ltd | Builders | SA11 2PF | 2019 |
| Amd Construction South Wales Ltd | Builders | SA11 3BH | 2024 |
| Anderson Building & Maintenance Ltd | Builders | SA11 2AY | 2025 |
| Apex Property Developments South Wales Ltd | Builders | SA12 6AW | 2023 |
| Ascot (Kitchen and Bedrooms) Ltd | Builders | SA12 8AJ | 2005 |
| Ascragga Rooch Infrastructure Projects Ltd | Builders | SA11 1DJ | 2019 |
| Aspect Groundworks Ltd | Builders | SA11 5NF | 2023 |
| Bastion Fire Protection Ltd | Builders | SA12 6LP | 2026 |
| Bayview Aluminium Ltd | Builders | SA12 7BR | 2020 |
| Baz Fire Protection Ltd | Builders | SA12 8AD | 2018 |
| Brian Evans Floor Screeders Ltd | Builders | SA12 7PJ | 2016 |
| C Install Ltd | Builders | SA12 6LF | 2020 |
| C Property Ltd | Builders | SA12 9AB | 2018 |
| C. Moses Roofing Ltd | Builders | SA11 4BG | 1982 |
| C.A.J. Fielding Engineering Services Ltd | Builders | SA11 3XF | 2013 |
| Cah Ltd | Builders | SA11 5UN | 1999 |
| Caled Bricklaying Ltd | Builders | SA11 5LB | 2025 |
| Camjoy Construction & Utilities Ltd | Builders | SA12 6LP | 2019 |
| Carl Hendy Ltd | Builders | SA11 1LF | 2013 |
| Cavi Clear Ltd | Builders | SA11 1DQ | 2018 |
| Cavibuild Ltd | Builders | SA11 2NS | 2022 |
| Clh Brickwork Ltd | Builders | SA11 4AQ | 2026 |
| Cm Nest Ltd | Builders | SA11 3RN | 2025 |
| Cmj Building Solutions Ltd | Builders | SA12 8BG | 2023 |
| Core Seal Ltd | Builders | SA11 4HF | 2017 |
| Cravagan Site Services Ltd | Builders | SA12 8HL | 2026 |
| Creative Paving (Tvs) Ltd | Builders | SA11 3BH | 2022 |
| Crigs-Rees Partnership Ltd | Builders | SA12 9AZ | 2021 |
| Crown Property & Roofing Specialist Ltd | Builders | SA11 3BH | 2024 |
| Cyris Plant Operations Ltd | Builders | SA11 5EY | 2023 |
| D H Designer Home Improvements Ltd | Builders | SA11 2SL | 2026 |
| D&M Wolmark Building Contractors Ltd | Builders | SA12 9LP | 2017 |
| Danny West Tiling Ltd | Builders | SA12 6LF | 2016 |
| Dlis Ltd | Builders | SA11 3NT | 2019 |
| Dragonstone Construction Ltd | Builders | SA11 1DT | 2026 |
| Dunamis Builders Ltd | Builders | SA11 3AY | 2024 |
| Edwards Properties South Wales Ltd. | Builders | SA12 9BX | 2016 |
| Excalibur Solutions Group Ltd | Builders | SA12 6JW | 2025 |
| Exemplar Brickwork Ltd | Builders | SA11 4BG | 2026 |
| G & C Groundworks & Construction Ltd | Builders | SA11 3NX | 2018 |
| G Hopkins Installations Ltd | Builders | SA12 9EE | 2017 |
| Gourlay Hire Ltd | Builders | SA12 9DB | 1992 |
| H.H Building & Landscaping Ltd | Builders | SA12 7RY | 2025 |
| Ibm Brickwork Ltd | Builders | SA11 1YA | 2020 |
| Ics Overlays Ltd | Builders | SA12 9BP | 2009 |
| Improve Building and Maintenance Ltd | Builders | SA12 6SU | 2020 |
| Inspire Facilities UK Ltd | Builders | SA12 7BR | 2024 |
| Ionut Builders Ltd | Builders | SA12 6LY | 2026 |
| J G Jones (Kitchen Installations) Ltd | Builders | SA11 3RL | 2004 |
| J M Evans Building Ltd | Builders | SA11 2PA | 2025 |
| J. D. C. Developments Ltd. | Builders | SA11 4AN | 1999 |
| J.G. Hale Construction Ltd | Builders | SA11 1NJ | 1999 |
| Jc Resin Ltd | Builders | SA11 3BH | 2023 |
| Jones’S Property Solutions Ltd | Builders | SA11 1AN | 2026 |
| Justin Bailey Ltd | Builders | SA11 3PJ | 2019 |
| K&M Building Solutions Ltd | Builders | SA11 2RD | 2020 |
| Kd Steelwork Ltd | Builders | SA12 9EQ | 2025 |
| Krane Engineering Ltd | Builders | SA12 7PT | 1997 |
| Kyle Davies Building Contractor Ltd | Builders | SA11 5AF | 2018 |
| L & A Stonework Ltd | Builders | SA12 8EQ | 2023 |
| Laken Construction Ltd | Builders | SA11 3LN | 2025 |
| Laken Group Ltd | Builders | SA11 3HW | 2025 |
| Lmg Home Improvements Ltd | Builders | SA12 7BR | 2016 |
| Lpj Civils & Groundworks Ltd | Builders | SA11 3NX | 2020 |
| M A Frankcom Ltd | Builders | SA12 8YL | 2021 |
| M&J Monolith Construction Ltd | Builders | SA12 7NE | 2024 |
| M. Burley Consultants Ltd | Builders | SA11 3HX | 2013 |
| Mabe Construction Ltd | Builders | SA12 8AF | 2025 |
| Melvin Rigging and Welding Ltd | Builders | SA12 7TN | 2019 |
| Michael Thomas Building & Roofing Ltd | Builders | SA11 3BH | 2024 |
| Mjr Contracting Ltd | Builders | SA11 4BG | 2026 |
| 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 |
| N D James Screed Services Ltd | Builders | SA12 7TT | 2024 |
| Neath Hardware Ltd | Builders | SA11 1NR | 2008 |
| Nigel Trott Developments Ltd | Builders | SA12 6LF | 2018 |
| Olive Tree Construction Neath Ltd | Builders | SA11 1DX | 2025 |
| Oriel Technical Services Ltd | Builders | SA11 3TN | 2013 |
| Para Property Investment Ltd | Builders | SA12 8DS | 2020 |
| Parkside Professional Services Ltd | Builders | SA11 2TB | 2022 |
| Pmc Services (Wales & West) Ltd | Builders | SA11 5EY | 2018 |
| Port Talbot Brickwork Ltd | Builders | SA12 6BR | 2005 |
| Premier Builders (Port Talbot) Ltd | Builders | SA12 7SS | 1996 |
| Pristine Finish Carpentry & Building Ltd | Builders | SA12 8AD | 2025 |
| R & M Williams Energy & Fabric Ltd | Builders | SA11 1BY | 2026 |
| R & M Williams Ltd | Builders | SA11 1BY | 1978 |
| R Bell Construction Ltd | Builders | SA12 8AD | 2011 |
| R&R Waterblock Ltd | Builders | SA11 4NA | 2018 |
| R.E. Plant Hire Group Ltd | Builders | SA12 7UD | 2025 |
| R.E. Plant Hire Holdings Ltd | Builders | SA12 7TZ | 2016 |
| R.E. Plant Hire Ltd | Builders | SA12 7UD | 1974 |
| Red Kite Homes Ltd | Builders | SA12 9YB | 2002 |
| Retrofit Home Surveys Ltd | Builders | SA12 6DL | 2021 |
| Richard Morgan (Contractors) Ltd. | Builders | SA11 2TY | 1996 |
| Rigby Construction Ltd | Builders | SA11 2BU | 2018 |
| Rj Welding & Fabrications Ltd | Builders | SA11 3AY | 2026 |
| Rjallen Renovations & Property Ltd | Builders | SA11 3JA | 2025 |
| Robert Lee Holland Ltd | Builders | SA11 3FB | 2019 |
| S & E Engineering (Elec) Ltd | Builders | SA12 6BL | 2003 |
| S E Roofing and Building Services Ltd | Builders | SA11 3BH | 2026 |
| S&J Utilities Ltd | Builders | SA12 6LP | 2016 |
| Sa1 Driveways & Patio Specialists Ltd | Builders | SA12 7BE | 2023 |
| Safety Construction Services Ltd | Builders | SA11 4AA | 2020 |
| Secure Roofing & Building Ltd | Builders | SA11 3BH | 2026 |
| Sherwood'S Carpentry and Building Services Ltd | Builders | SA12 6PT | 2026 |
| Shirlan Construction Ltd | Builders | SA11 3XA | 2004 |
| Signature Carpentry Ltd | Builders | SA11 5EZ | 2023 |
| Site Heat Treatment Services Ltd | Builders | SA12 6NH | 1981 |
| Site Smart Timber Frame Solutions Ltd | Builders | SA12 6HG | 2023 |
| Sleep Window Systems Ltd | Builders | SA11 4AU | 2017 |
| Smart Design Building & Roofing Ltd | Builders | SA11 5AH | 2025 |
| Smc Marine Ltd | Builders | SA12 8AD | 2022 |
| Smooth Operators Screeding Ltd | Builders | SA12 7DR | 2026 |
| Sp & Am Building Services Ltd | Builders | SA11 3TE | 2017 |
| Sunshine Home Improvements Ltd | Builders | SA11 1DL | 2012 |
| Supreme Timberframe Ltd | Builders | SA11 3QQ | 2019 |
| T F Construction Management Ltd | Builders | SA11 5HN | 2017 |
| Ta Carpentry Ltd | Builders | SA11 2AT | 2021 |
| Terrain Living Ltd | Builders | SA11 5LB | 2026 |
| The Surge Pub Ltd | Builders | SA12 6DL | 2015 |
| Top Frame Timber Frame Ltd | Builders | SA11 5EZ | 2016 |
| Top Plant Construction Ltd | Builders | SA11 5NF | 2018 |
| UK Retail Installers Ltd | Builders | SA12 6LF | 2026 |
| UK-Build Ltd | Builders | SA11 2BW | 2022 |
| Vacanze Italiane Ltd | Builders | SA12 6HZ | 2017 |
| W.T. Mahoney Ltd | Builders | SA12 9LD | 2013 |
| Wayne Home Improvements Ltd | Builders | SA12 6HG | 2026 |
| Welco & Son Roofing & Building Ltd | Builders | SA12 9PW | 2023 |
| Wps-UK Ltd | Builders | SA12 7AX | 2020 |
| Wrs Repairs & Maintenance Ltd | Builders | SA11 4NA | 2026 |