| A M J Carpentry & Joinery Ltd | Builders | NP19 7JY | 2002 |
| A&A Diy Ltd | Builders | NP19 4DP | 2025 |
| A&D Sisman Construction Ltd | Builders | NP19 7JW | 2022 |
| A. L. Robinson (Contract Services) Ltd | Builders | NP19 0AR | 2005 |
| Aa Complete Roofing & Construction Ltd | Builders | NP19 8GX | 2023 |
| Adam Sheedy Ltd | Builders | NP26 3AD | 2019 |
| Aes Building Contractors Ltd | Builders | NP19 7HN | 2026 |
| Ajk Maintenance Ltd | Builders | NP19 7NB | 2025 |
| Am Weaver Ltd | Builders | NP19 0AR | 2017 |
| Applied Pipework Ltd | Builders | NP19 0AR | 2012 |
| Arcadia Property Services Ltd | Builders | NP26 3AZ | 2021 |
| Asbestos Consultancy (Sw) Ltd | Builders | NP19 0LQ | 2024 |
| Atlantic Home Solution Ltd | Builders | NP19 4LB | 2024 |
| Atwill Stone Company Ltd | Builders | NP26 4PQ | 2011 |
| B.J.W. Construction Ltd | Builders | NP26 5UT | 2023 |
| Backbone Projects Ltd | Builders | NP19 4NJ | 2017 |
| Bee National Installations Ltd | Builders | NP18 1PR | 2024 |
| Beechurst Homes Ltd | Builders | NP19 8LE | 2015 |
| Beechwood Carpentry and Timber Frame Specialist Ltd | Builders | NP18 2JJ | 2018 |
| Belphor Shopfitting Ltd | Builders | NP19 8NS | 2026 |
| Benden Building Ltd | Builders | NP19 8AH | 2013 |
| Bison Industrial Doors Ltd | Builders | NP26 4QQ | 2018 |
| Bl Contractors Ltd | Builders | NP19 0AR | 2018 |
| Bobbys Property Maintenance Ltd | Builders | NP19 7DE | 2024 |
| Borefence Ltd | Builders | NP18 2EL | 2009 |
| Bowen James Ltd | Builders | NP19 4SP | 2018 |
| Bristol Conservatory Upgrades Ltd | Builders | NP19 4AH | 2015 |
| Broom Homes Ltd | Builders | NP18 1LT | 2018 |
| Broomhomes River Ltd | Builders | NP18 1LT | 2018 |
| Builder Pro Base Ltd | Builders | NP19 7GU | 2025 |
| Bws Home Improvements Ltd | Builders | NP19 0LW | 2020 |
| C T J Homes Ltd | Builders | NP19 4TU | 2025 |
| Calcoop Construction & Property Maintenance Ltd | Builders | NP19 4RQ | 2020 |
| Celtic Construction Group Ltd | Builders | NP26 5PA | 2012 |
| Cg Infra Ltd | Builders | NP26 5JH | 2023 |
| Cgs Construction Crosskeys Ltd | Builders | NP19 0AR | 2019 |
| Christchurch Developments Npt Ltd | Builders | NP18 1JJ | 2018 |
| Clark Contractors (Fire Protection Division) Ltd | Builders | NP19 4PQ | 2022 |
| Cm Gardening Ltd | Builders | NP19 0AR | 2024 |
| Cm1 Ltd | Builders | NP19 0BS | 2025 |
| Cn Survey Ltd | Builders | NP19 8AW | 2014 |
| Cobb Builders Ltd | Builders | NP19 8HL | 2024 |
| Cockeram Contractors Ltd | Builders | NP26 5JH | 2026 |
| Colourfence Ltd | Builders | NP19 4SP | 2005 |
| Construction Mp Ltd | Builders | NP19 7BZ | 2024 |
| Corinthian Homes Group Ltd | Builders | NP18 2ED | 2019 |
| Cpg Services Ltd | Builders | NP18 2HJ | 2025 |
| Crmd Consulting Ltd | Builders | NP18 1QA | 2023 |
| Crystal Clear Construction Ltd | Builders | NP26 3DE | 2025 |
| Cwbs Carpentry & Building Ltd | Builders | NP26 5AD | 2021 |
| Cymru Kitchens Ltd | Builders | NP19 7BA | 1992 |
| D and C Property Solutions (Newport) Ltd | Builders | NP26 5JH | 2026 |
| D P Formwork Ltd | Builders | NP18 2JX | 2007 |
| D.H. & S.J. Preece (Builders) Ltd | Builders | NP18 2AT | 1989 |
| D2 Steel Ltd | Builders | NP26 5PA | 2023 |
| Danny'S Engineering Services Ltd | Builders | NP19 4NZ | 2015 |
| Davies & Jones Groundworks Ltd | Builders | NP18 1GJ | 2025 |
| Davies Brothers (Newport) Ltd | Builders | NP19 7EL | 2022 |
| Davies Contractors Group Ltd | Builders | NP19 4PN | 2023 |
| Davies Contractors Ltd | Builders | NP19 4PN | 2015 |
| Davlan Construction Ltd | Builders | NP19 0FP | 1981 |
| Dcn Builders Ltd | Builders | NP19 0AR | 2019 |
| Djh Steel Fixing Ltd | Builders | NP19 9QL | 2020 |
| Djr Site Services Ltd | Builders | NP18 2NF | 2011 |
| Dkg Project Developments Ltd | Builders | NP26 5JH | 2022 |
| Doorway Windows Ltd | Builders | NP19 9FQ | 2020 |
| Drac Access Solutions Ltd | Builders | NP19 4PQ | 2022 |
| Dsj Bubbles Ltd | Builders | NP18 3NS | 2020 |
| Dupoll Ltd | Builders | NP26 5JH | 2021 |
| Eco Building Products Ltd | Builders | NP19 8JR | 2015 |
| Eco Vision Build Ltd | Builders | NP19 8JR | 2025 |
| Edge To Edge Paving Specialists Ltd | Builders | NP19 8HR | 2012 |
| Eduard Mgm Group Ltd | Builders | NP19 7GZ | 2025 |
| Ely Formworks Ltd | Builders | NP19 0AR | 2014 |
| Evan Jones & Associates Ltd | Builders | NP19 7SJ | 2026 |
| Everdry Damp Solutions Ltd | Builders | NP19 8JJ | 2025 |
| Fm Plastering & Building Ltd | Builders | NP19 0LL | 2022 |
| Fm Renovations & Building Ltd | Builders | NP19 0LL | 2023 |
| Frametech Construction, Building & Maintenance Ltd | Builders | NP26 3DE | 2018 |
| G W Construction (South Wales) Ltd | Builders | NP26 3JN | 2017 |
| Gcs Safety Services Ltd | Builders | NP18 2BL | 2018 |
| Get Zero Ltd | Builders | NP18 1AA | 2024 |
| Gghm Ltd | Builders | NP26 3FQ | 2023 |
| Ginger Exhibitions Ltd | Builders | NP19 0AR | 2004 |
| Global Insulated Structures Ltd | Builders | NP26 3NY | 2013 |
| Gmb Driveways and Patios Ltd | Builders | NP26 3EB | 2026 |
| Green Sphere (Npt) Ltd | Builders | NP19 0AW | 2026 |
| Gyles Blake Construction Ltd | Builders | NP26 5PF | 2003 |
| Hard Technical Solutions Ltd | Builders | NP19 9ND | 2025 |
| Harris Property Renovations Ltd | Builders | NP26 5BN | 2021 |
| Heathman Homes Construction and Groundworks Ltd | Builders | NP26 3JH | 2025 |
| Hergan Construction Ltd | Builders | NP19 7AP | 2010 |
| High Torque Rope Access Solutions Ltd. | Builders | NP19 4SX | 2014 |
| Homeshield Insulation Ltd | Builders | NP19 0LW | 2013 |
| Huan Yu Green Building Materials Technology Co Ltd | Builders | NP18 2LZ | 2025 |
| Hyk Management Ltd | Builders | NP19 8ED | 2026 |
| Ia Mech Engineering Ltd | Builders | NP26 4QD | 2025 |
| Ieuans Floor Fitting Business Cyf | Builders | NP19 9PA | 2025 |
| Ij Construction & Civil Engineering Ltd | Builders | NP18 3XL | 2023 |
| Iles Groundworks and Civil Engineering Ltd | Builders | NP26 5JH | 2018 |
| Iltg Ltd | Builders | NP26 4QH | 2023 |
| Imcec Ltd | Builders | NP19 8HT | 2019 |
| Infiniti2 Ltd | Builders | NP19 4RF | 2019 |
| Irmaa Properties Ltd | Builders | NP19 0DQ | 2018 |
| Isca Renewables Ltd | Builders | NP18 3EN | 2021 |
| J Derrick Paving Ltd | Builders | NP19 0AR | 2026 |
| J.A Converse Ltd | Builders | NP19 0AW | 2025 |
| J.A. Pro Construction Ltd | Builders | NP19 0AW | 2016 |
| James Williams Builders Ltd | Builders | NP26 3JQ | 2023 |
| Jlp27 Ltd | Builders | NP26 5PA | 2024 |
| Jmi Construction and Civil Engineering Ltd | Builders | NP18 3XL | 2014 |
| Jmp Drylining Ltd | Builders | NP19 0FS | 2024 |
| Jn Property Management Ltd | Builders | NP26 5SA | 2025 |
| Jpr’S Building Solutions Ltd. | Builders | NP19 4NG | 2025 |
| Jr Superior Homes Ltd | Builders | NP19 4LH | 2020 |
| Jtv Brickwork Ltd | Builders | NP19 4QJ | 2024 |
| K Gotobed Ltd | Builders | NP18 2JS | 2016 |
| K M Construction and Maintenance Ltd | Builders | NP18 2HJ | 2022 |
| K Pook Brickwork Ltd | Builders | NP19 8DW | 2023 |
| Kardinale Homes Ltd | Builders | NP26 5JH | 2012 |
| Kasa Contractors Ltd | Builders | NP19 7BA | 2026 |
| Katherine Anthony Investments Ltd | Builders | NP26 5AD | 2026 |
| Kavara Ltd | Builders | NP26 3AY | 2026 |
| Kelemen Building Contractors Ltd | Builders | NP19 9QB | 2026 |
| Kendall Construction Ltd | Builders | NP26 5PJ | 2025 |
| Kje Construction & Groundworks Ltd | Builders | NP26 5TL | 2023 |
| Kjs Construction and Developments Ltd | Builders | NP18 2DR | 2025 |
| Kwf Builders Ltd | Builders | NP19 0AR | 2023 |
| L Powell Upvc Ltd | Builders | NP19 9DW | 2023 |
| L&S Buildings and Renovations Ltd | Builders | NP19 0AR | 2025 |
| Leighton Carter Insulation Co. Ltd | Builders | NP19 4PT | 1973 |
| Little Details Ltd | Builders | NP26 5JH | 2016 |
| Lkaia Properties Ltd | Builders | NP18 2DD | 2015 |
| Llewellyn Rhys Construction Ltd | Builders | NP18 3TB | 2025 |
| Loft South Wales Ltd | Builders | NP18 3NZ | 2016 |
| Longmore Construction Ltd | Builders | NP18 1AR | 2020 |
| Lovell Home Improvements Ltd | Builders | NP19 0DQ | 2019 |
| M & L Williams Ltd | Builders | NP18 1GP | 2012 |
| M H Davies Construction Ltd | Builders | NP18 1GJ | 2025 |
| M.O.D. Construction Services Ltd | Builders | NP19 8AE | 2021 |
| Mag Bricklaying Ltd | Builders | NP19 0AS | 2020 |
| Magor Developments Ltd | Builders | NP26 3AP | 2011 |
| Mainty Group Consulting Ltd | Builders | NP19 4RF | 2021 |
| Masi Construction Ltd | Builders | NP19 8BJ | 2012 |
| Mbe Property & Renovations Ltd | Builders | NP26 5JH | 2021 |
| Md Building & Renovation Solutions Ltd | Builders | NP19 0LY | 2019 |
| Mji Civils Ltd | Builders | NP19 0AR | 2016 |
| Mm Materials Ltd | Builders | NP19 0AS | 2023 |
| Monmouthshire Driveways and Landscaping Ltd | Builders | NP26 5JH | 2023 |
| Mvr Solutions Ltd | Builders | NP19 4PQ | 2012 |