| 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 |
| 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 Handyman Ltd | Builders | SA8 4DX | 2024 |
| Abigails Hair Studio Ltd | Hair & beauty | SA7 9FS | 2018 |
| 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 |
| Alltwen Building & Maintenance Ltd | Builders | SA8 4HU | 2017 |
| Alpha Roofing & Building Ltd | Roofers | SA7 0HB | 2024 |
| Alpha Upvc Ltd | Builders | SA8 4QQ | 2019 |
| Amarok Building Services Ltd | Builders | SA7 0AJ | 2022 |
| Amber Jones Assets & Management Ltd | Garages & mechanics | SA7 0AJ | 2023 |
| Antlin Plumbing & Heating Ltd | Plumbing & heating | SA8 4HU | 2011 |
| Ar Plumbing, Heating & Gas Ltd | Plumbing & heating | SA7 9NJ | 2021 |
| 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 |
| 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 |
| 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 |
| 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 |
| Barneys Removals Ltd | Removals | SA7 0AJ | 2025 |
| Barrie Scully Building Contractors Ltd | Builders | SA8 4HU | 2013 |
| 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 |
| Boss Skin & Wellness Ltd | Hair & beauty | SA7 9LS | 2026 |
| Br Joinery Ltd | Builders | SA7 9LA | 2022 |
| Broadstone Construction (Swansea) Ltd | Builders | SA7 0AJ | 2012 |
| Bsb Hair Ltd | Hair & beauty | SA8 4HU | 2023 |
| 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'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 |
| 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 |
| Chinwonu Ltd | Cleaners | SA7 9PH | 2022 |
| Chloe Richards Hair Ltd | Hair & beauty | SA7 0AJ | 2024 |
| Cjp Testing Services Ltd | Garages & mechanics | SA7 0AJ | 2019 |
| Cjwr Construction Ltd | Builders | SA7 0AJ | 2024 |
| Clima Cooling Solutions Ltd | Plumbing & heating | SA7 9PP | 2026 |
| Coastal Roofing & Building Ltd | Roofers | SA7 0AJ | 2020 |
| Coastline Windows Ltd | Glaziers | SA7 0AJ | 2025 |
| Connected Electric Ltd | Electricians | SA7 9JB | 2022 |
| Construction Repairs Ltd | Builders | SA8 4HU | 2010 |
| Coombs Connected Ltd | Electricians | SA8 4QN | 2024 |
| Cowling Holdings Ltd | Builders | SA7 0AJ | 2020 |
| Crest Ceilings & Partitions Ltd | Builders | SA7 9FS | 2011 |
| Cursio Construction Ltd | Builders | SA7 0AJ | 2017 |
| Cursio Electrical Ltd | Electricians | SA7 0AJ | 2025 |
| Cutting Corner Ltd | Hair & beauty | SA7 9SL | 2011 |
| 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 Romano & Son Ltd | Electricians | SA8 4DX | 2007 |
| 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 |
| 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 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 |
| Dhwd Ltd | Builders | SA7 9LA | 2009 |
| Dirt Attack Wales Ltd | Cleaners | SA7 9XT | 2003 |
| Djp Plumbing and Heating Ltd. | Plumbing & heating | SA8 4PH | 2021 |
| Dm Carpet Clean Ltd | Cleaners | SA7 9LA | 2025 |
| Dmd Facades Ltd | Builders | SA7 9WP | 2022 |
| Dmd Roofing and Building Ltd | Builders | SA7 0AJ | 2026 |
| Door System Installations Ltd | Builders | SA7 9LA | 2009 |
| Double K Heating and Plumbing Ltd | Plumbing & heating | SA8 4HQ | 2017 |
| Dower Roofing Ltd | Roofers | SA7 0AJ | 2024 |
| Dpe Removals and Storage Ltd | Removals | SA7 0AJ | 2024 |
| Dprice Builders Ltd | Builders | SA8 4LU | 2019 |
| Dragon Roofing Contractors Ltd | Roofers | SA8 4HU | 2003 |
| Dragon Sealants Ltd | Builders | SA7 9QB | 2015 |
| Dulais Valley Developments Ltd | Builders | SA7 9FS | 2017 |
| Duramax Plumbing Ltd | Plumbing & heating | SA8 4QU | 2025 |
| Durk Technik Ltd | Electricians | SA7 9BZ | 2006 |
| Dyfed Developments Spv 1 Ltd | Builders | SA7 0AP | 2022 |
| Dyfed Developments Spv 2 Ltd | Builders | SA7 0AP | 2022 |
| E Cursio Ltd | Hair & beauty | SA7 0AJ | 2023 |
| E L Carpentry Ltd | Joiners & carpenters | SA7 9LA | 2022 |
| E4 Renov8 Ltd | Builders | SA7 9EQ | 2024 |
| Eco Renewable Installations Ltd | Electricians | SA7 9JU | 2025 |
| Edwards Energy & Property Ltd | Cleaners | SA7 9UL | 2021 |
| Efficient Living Solutions UK Ltd | Builders | SA7 9LA | 2023 |
| Electrical & Renewable Installations Ltd | Electricians | SA7 9LA | 2023 |
| Electrical Innovation (Wales) Ltd | Electricians | SA8 4HU | 2011 |
| Elegra Electricals Ltd | Electricians | SA7 9UN | 2026 |
| Elite Blasting Solutions Ltd | Cleaners | SA7 0AJ | 2022 |
| Encom Building Services Ltd | Builders | SA7 9FP | 2023 |
| Endolaserlift Ltd | Hair & beauty | SA8 4DX | 2026 |
| Enhanced Consultancy Ltd | Hair & beauty | SA7 0AJ | 2019 |
| Estuary Scaffolding and Roofing Ltd | Roofers | SA7 9LA | 2020 |
| Ev & Solar Solutions Ltd | Electricians | SA7 9LA | 2023 |
| Eveo Engineering Ltd | Electricians | SA7 9EY | 2026 |
| Falconry Services, Bird and Pest Control Ltd | Pest control | SA7 9LA | 2013 |
| Fernlee Estates Ltd | Builders | SA7 9NL | 1982 |
| Fidelta Ltd | Cleaners | SA7 0AJ | 2020 |
| First Fix Interiors Ltd | Builders | SA8 4LX | 2026 |
| Foundry & Co Construction Ltd | Builders | SA7 0AJ | 2026 |
| Frame King UK Ltd | Joiners & carpenters | SA7 0AJ | 2020 |
| Fresh Car Wash Ltd | Garages & mechanics | SA7 9AD | 2025 |
| Funkynailsbyem Ltd | Hair & beauty | SA7 0NT | 2021 |
| G & C Carpentry Ltd | Joiners & carpenters | SA7 9FS | 2015 |
| Gaia Hair Design Ltd | Hair & beauty | SA7 9TT | 2022 |
| Gas Care Swansea Ltd | Plumbing & heating | SA7 0AJ | 2025 |
| Gavin’S Home Improvements Ltd | Joiners & carpenters | SA7 9EJ | 2025 |