| 11021998 Ltd | Joiners & carpenters | SA7 0AJ | 2026 |
| 1st Stop Property Services Ltd | Cleaners | SA7 9FP | 2015 |
| 3h Joinery Ltd | Joiners & carpenters | SA7 0AJ | 2026 |
| 6 Energy Ltd | Plumbing & heating | SA7 9FS | 2026 |
| 629 Clydach Road Ltd | Builders | SA7 0AJ | 2017 |
| 92 Woodfield Street Barber Ltd | Hair & beauty | SA6 8BA | 2022 |
| A & L Bricklaying Services Ltd | Builders | SA8 3BE | 2018 |
| A Listed Home Improvements Ltd | Glaziers | SA7 9TW | 2019 |
| A P Architecture and Planning Ltd | Builders | SA7 0AJ | 2010 |
| A. & B. Electrics Ltd | Electricians | SA7 9NN | 2002 |
| A1 Resin Ltd | Builders | SA7 9FP | 2020 |
| Ab Tyre and Aircon Services Ltd | Garages & mechanics | SA7 9XZ | 2026 |
| Abc 24/7 Pest Control Ltd. | Pest control | SA7 9TR | 2012 |
| Abertawe Sectional Buildings Ltd | Builders | SA6 8QF | 2013 |
| Abigails Hair Studio Ltd | Hair & beauty | SA7 9FS | 2018 |
| Acl Mobile Repairs Ltd | Appliance repair | SA6 8BS | 2018 |
| Aesthetics By Alex Ltd | Hair & beauty | SA6 6BT | 2025 |
| Affect Ability Ltd | Builders | SA6 5AS | 2017 |
| Afon Lime Ltd | Plasterers | SA6 6AJ | 2020 |
| Ahead Services (UK) Ltd | Gardeners & landscapers | SA7 9SX | 2011 |
| Air Conditioning & Heat Pumps Ltd | Plumbing & heating | SA7 9LA | 2026 |
| Air Source Energy South Wales Ltd | Plumbing & heating | SA7 9BD | 2022 |
| Aj Bespoke Carpentry Ltd | Builders | SA7 0AJ | 2024 |
| Aj Williams Electrical Services Ltd | Electricians | SA8 4ND | 2021 |
| Aldeco Ltd | Builders | SA7 0AJ | 2018 |
| All 4 You Contractors Ltd | Builders | SA6 7BP | 2017 |
| All Wheels Alloy Ltd | Garages & mechanics | SA6 8QR | 2011 |
| Alltwen Building & Maintenance Ltd | Builders | SA8 4HU | 2017 |
| Alpha Roofing & Building Ltd | Roofers | SA7 0HB | 2024 |
| Alpha Upvc Ltd | Builders | SA8 4QQ | 2019 |
| Alpine Roofing (Swansea) Ltd | Roofers | SA6 6QW | 2026 |
| Amarok Building Services Ltd | Builders | SA7 0AJ | 2022 |
| Amber Jones Assets & Management Ltd | Garages & mechanics | SA7 0AJ | 2023 |
| Ammcom Ltd | Electricians | SA6 8QE | 2003 |
| Amroc Heating Services Ltd | Plumbing & heating | SA6 8QE | 2006 |
| Andrew Wedlake Electrical Ltd | Electricians | SA6 6PS | 2011 |
| Antlin Plumbing & Heating Ltd | Plumbing & heating | SA8 4HU | 2011 |
| Anvil Flat Roofing Ltd | Roofers | SA6 6EH | 2024 |
| Anvil Roofing Ltd | Roofers | SA6 6EH | 2021 |
| Ar Plumbing, Heating & Gas Ltd | Plumbing & heating | SA7 9NJ | 2021 |
| Arcsafe Ltd | Electricians | SA6 6HB | 2019 |
| Ark Appliances Ltd | Appliance repair | SA8 4HU | 2003 |
| Armine Garages Ltd | Garages & mechanics | SA7 9LA | 1962 |
| Arthur Reginald Construction Ltd | Builders | SA7 9FS | 2023 |
| Artisan Home & Property Solutions Ltd | Painters & decorators | SA7 9GG | 2025 |
| Asap Roofing Swansea Ltd | Roofers | SA7 0AJ | 2026 |
| Ashley Lewis Vehicle Tech Ltd | Garages & mechanics | SA7 9XZ | 2025 |
| Aspire 41 Ltd | Hair & beauty | SA7 0HE | 2021 |
| Aspire Art of Hair and Beauty Ltd | Hair & beauty | SA6 8DY | 2026 |
| Asw Energy Services Ltd | Plumbing & heating | SA7 9FS | 2019 |
| Asw Property Services Ltd | Builders | SA7 9FS | 2000 |
| At Blossom Ltd | Hair & beauty | SA7 9FS | 2023 |
| Ateam4hire Ltd | Removals | SA6 8DU | 2018 |
| Atf Transformations Ltd | Builders | SA6 6TA | 2024 |
| Atlas Solar & Storage Ltd | Electricians | SA7 0AJ | 2026 |
| 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 |
| Awrb Solar & Storage Solutions Ltd | Electricians | SA8 4EZ | 2023 |
| B&C Building (Swansea) Ltd | Builders | SA7 9FP | 2026 |
| B. D. Welding Ltd | Builders | SA8 4HU | 2002 |
| B.D.L. Carpentry Ltd. | Joiners & carpenters | SA6 6LU | 2003 |
| Ballard Homes Ltd | Builders | SA6 8EX | 1997 |
| Barneys Removals Ltd | Removals | SA7 0AJ | 2025 |
| Barrie Scully Building Contractors Ltd | Builders | SA8 4HU | 2013 |
| Bassetts (Swansea) Ltd | Garages & mechanics | SA6 8HF | 1991 |
| Bayside Building Ltd | Builders | SA6 8HG | 2026 |
| Beauty By Lucy Ltd. | Hair & beauty | SA8 4HD | 2024 |
| Bedrich Homes Ltd | Builders | SA7 0AJ | 2024 |
| Bello Capelli (Swansea) Ltd | Hair & beauty | SA7 0AJ | 2013 |
| Bello Capelli Beauty Ltd | Hair & beauty | SA7 0AJ | 2017 |
| Bellwood Therapies Ltd | Hair & beauty | SA7 9BJ | 2018 |
| Bespoke Construction & Plastering Ltd | Builders | SA7 0AJ | 2024 |
| Best Kept Secret Aesthetics Ltd | Hair & beauty | SA7 9FS | 2020 |
| Black Mountain Construction Services Ltd | Plasterers | SA8 4TY | 2025 |
| Blitzer Group Ltd | Cleaners | SA7 9LA | 2024 |
| Bloom Nail & Spa Ltd | Hair & beauty | SA6 8AL | 2026 |
| Bm Carpentry Solutions Ltd | Joiners & carpenters | SA8 3ED | 2026 |
| Bml Interiors Ltd | Builders | SA6 8BP | 2025 |
| Boss Skin & Wellness Ltd | Hair & beauty | SA7 9LS | 2026 |
| Boughan Professional Cleaning Ltd | Cleaners | SA6 6FH | 2025 |
| Br Joinery Ltd | Builders | SA7 9LA | 2022 |
| Broadstone Construction (Swansea) Ltd | Builders | SA7 0AJ | 2012 |
| Bsb Hair Ltd | Hair & beauty | SA8 4HU | 2023 |
| 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 |
| Cam Sport Ltd | Garages & mechanics | SA8 4HU | 2010 |
| Cannon Heating Services Ltd | Plumbing & heating | SA8 4HU | 2007 |
| Caradog Landscapes Ltd | Builders | SA7 0AJ | 2016 |
| Carsmetics Ltd | Garages & mechanics | SA7 9LA | 2008 |
| Carter & Co Associates Ltd | Builders | SA8 3AS | 2006 |
| Carter'S Auto Repair Centre Ltd | Garages & mechanics | SA8 4QL | 2016 |
| Carter'S Mot and Auto Repair Centre Ltd | Garages & mechanics | SA8 4QL | 2013 |
| Castell Civils Ltd | Builders | SA7 0AP | 2024 |
| Castell Construction Ltd | Builders | SA7 0AP | 2019 |
| Caswell Interiors Ltd | Builders | SA6 8QQ | 2008 |
| Cd Electrical Ltd | Electricians | SA7 9LA | 2020 |
| Cdaa Services Ltd | Builders | SA7 9EQ | 2023 |
| Celtic Caravan Care Ltd | Garages & mechanics | SA7 9TE | 2013 |
| Celtic Green Gardens Ltd | Gardeners & landscapers | SA7 9NN | 2025 |
| Celtic Office Cleaning Ltd | Cleaners | SA6 6LP | 2025 |
| Ceo.Welding Ltd | Builders | SA6 6QA | 2023 |
| Chinwonu Ltd | Cleaners | SA7 9PH | 2022 |
| Chloe Richards Hair Ltd | Hair & beauty | SA7 0AJ | 2024 |
| Civic Motoring Services Ltd | Garages & mechanics | SA6 8QF | 1992 |
| Cjp Testing Services Ltd | Garages & mechanics | SA7 0AJ | 2019 |
| Cjwr Construction Ltd | Builders | SA7 0AJ | 2024 |
| Classic Cut Barber Ltd | Hair & beauty | SA6 8AR | 2014 |
| Clearsafe Partners Ltd | Gardeners & landscapers | SA8 3AL | 2016 |
| Clima Cooling Solutions Ltd | Plumbing & heating | SA7 9PP | 2026 |
| Cmp Carpentry Ltd | Joiners & carpenters | SA6 8JG | 2017 |
| Coastal Roofing & Building Ltd | Roofers | SA7 0AJ | 2020 |
| Coastline Windows Ltd | Glaziers | SA7 0AJ | 2025 |
| Color Harmony Ltd | Painters & decorators | SA6 8AL | 2026 |
| Compton Developments Ltd | Builders | SA6 8EX | 1973 |
| Compton Solar Ltd | Electricians | SA6 8EX | 2011 |
| Construction Repairs Ltd | Builders | SA8 4HU | 2010 |
| Coombs Connected Ltd | Electricians | SA8 4QN | 2024 |
| 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 |
| Csmc Electrical Ltd | Electricians | SA6 6TP | 2025 |
| Cursio Construction Ltd | Builders | SA7 0AJ | 2017 |
| Cursio Electrical Ltd | Electricians | SA7 0AJ | 2025 |
| Cutting Corner Ltd | Hair & beauty | SA7 9SL | 2011 |
| Cwjet Ltd | Builders | SA6 6EZ | 2025 |
| Cygnus Holdings (Cardiff) Ltd | Builders | SA7 0AJ | 2018 |
| D B Property Enterprises Ltd | Builders | SA8 4SX | 2024 |
| D E Civils Ltd | Electricians | SA7 9QU | 2014 |
| D J Williams & Son Ltd | Roofers | SA7 0AJ | 2014 |
| D&S Flat Roofing Ltd | Roofers | SA7 9EZ | 2024 |
| D.G. Moses Plant Hire Ltd | Builders | SA8 4HU | 1997 |
| D.G.S Tyre and Garage Services Ltd | Garages & mechanics | SA8 4SL | 2020 |
| Darglen Motors Ltd | Garages & mechanics | SA6 8EF | 1973 |
| Darlee Ltd | Roofers | SA6 8DU | 2025 |
| Darmont Construction Ltd | Builders | SA7 0AJ | 2018 |
| Databid Ltd | Groundworks & demolition | SA7 9LA | 1992 |
| Davan Construction Ltd | Builders | SA7 9LA | 2016 |
| David Ham Autobody Ltd | Garages & mechanics | SA7 9HA | 2014 |
| Davies Construction and Groundworks Ltd | Builders | SA8 3JE | 2023 |
| Davies Groundworks and Construction Ltd | Builders | SA8 4RN | 2026 |
| Dccscleaning Services Ltd | Cleaners | SA7 9LN | 2024 |
| Dcw Project Services Ltd | Builders | SA7 0AJ | 2018 |
| Defyne By Sheridan Phillips Ltd | Hair & beauty | SA7 9SY | 2025 |
| Dennis Barber (Pontardawe) Ltd | Hair & beauty | SA8 4ED | 2025 |