| 3 Jays Services Ltd | Builders | NP11 4LU | 2022 |
| A P Waters Building Contractors Ltd | Builders | NP4 8AN | 2007 |
| A.I.R Cladding Ltd | Builders | NP4 0SW | 2021 |
| A.J. Quinn Building Contractors Ltd | Builders | NP4 5EJ | 2001 |
| Aa Rendering Ltd | Builders | NP11 6EE | 2026 |
| Abbyfield Construction Ltd | Builders | NP4 8DD | 2000 |
| Aber Locksmith Services Ltd | Builders | NP11 4SP | 2005 |
| Abrasion Ltd | Builders | NP4 0JL | 2025 |
| Alex Barry Construction & Developments Ltd | Builders | NP4 6TF | 2026 |
| All About Windows Ltd | Builders | NP4 5JA | 2011 |
| Almobarak Construction Ltd | Builders | NP4 5DA | 2024 |
| Alvio Civil Engineering Ltd | Builders | NP4 0HZ | 2012 |
| Arcana Services Ltd | Builders | NP4 5ST | 2024 |
| Bancroft Property Services Ltd | Builders | NP4 5LT | 2018 |
| Bespoke Maintenance & Facilities Management Ltd | Builders | NP4 8ES | 2026 |
| Bmg Construction (Mb) Ltd | Builders | NP4 5YN | 2022 |
| Brambles Builders Ltd | Builders | NP4 6TF | 2020 |
| Bree (Wales) Ltd | Builders | NP4 5AE | 2014 |
| Brickcraft Building and Civil Engineering Ltd | Builders | NP4 9BP | 2002 |
| Bristol Bath Builders Ltd | Builders | NP4 8EG | 2020 |
| Brynmara Capital Ltd | Builders | NP11 4FW | 2018 |
| Bt Parry Brickwork Ltd | Builders | NP4 0NR | 2019 |
| Butler Wall Blaenavon Ltd | Builders | NP4 0TW | 2013 |
| Butlerwall Tenby Ltd | Builders | NP4 0TW | 2015 |
| C P Contracts Sw Ltd | Builders | NP4 5SQ | 2024 |
| C R Roofing & Building Ltd | Builders | NP4 0SY | 2002 |
| Capsel Ltd | Builders | NP4 0JJ | 2012 |
| Charles Barclay Homes Ltd | Builders | NP11 5AR | 2016 |
| Concrete Antibrasive Refractory Liningsi Ltd | Builders | NP4 5HR | 2023 |
| Craxford Brothers (Usk) Ltd | Builders | NP4 5JF | 2011 |
| Crosskeys Resin Ltd | Builders | NP11 7AL | 2025 |
| Cyclone Ductwork Ltd | Builders | NP11 4FB | 2023 |
| Cym Sol Ltd | Builders | NP4 0HZ | 2018 |
| D George Ltd | Builders | NP4 0HZ | 2014 |
| D. Lucas & Sons Ltd | Builders | NP4 0LS | 1994 |
| Dave Gooding Site Services Ltd | Builders | NP11 5JQ | 2022 |
| David Turner Construction Ltd | Builders | NP4 0HN | 2020 |
| Denmore Homes Ltd | Builders | NP4 0XZ | 2016 |
| Designbuilduk Ltd | Builders | NP4 8EZ | 2024 |
| Dinas Building Company Ltd | Builders | NP11 4HN | 1960 |
| Dlr Bricklaying and Building Ltd | Builders | NP11 7AU | 2020 |
| Domjorella Developments Ltd | Builders | NP4 0SY | 2018 |
| Eco Build Property Solutions Ltd | Builders | NP11 5AR | 2017 |
| Edwards Contractors Group Ltd | Builders | NP4 5JR | 2026 |
| Elite Park Home Services Ltd | Builders | NP11 7ED | 2020 |
| Elite Windows and Building Solutions Ltd | Builders | NP11 6EG | 2018 |
| Excavators Wales Ltd | Builders | NP4 0UE | 1980 |
| F & J Plant Hire Ltd | Builders | NP4 0TW | 2002 |
| F I W Services Ltd | Builders | NP11 3BB | 2009 |
| Feenix Group Ltd | Builders | NP4 8BQ | 2025 |
| Fernandes & Co Ltd | Builders | NP4 0TY | 2015 |
| G C Windows Ltd | Builders | NP4 0JL | 2009 |
| G T Kitchens & Bathrooms Ltd | Builders | NP11 4SB | 2014 |
| G-Tap Ltd | Builders | NP4 0PT | 2019 |
| Gower Construction & Enclosures Ltd | Builders | NP4 9BP | 2010 |
| Gwent Blast Ltd | Builders | NP4 6TF | 2023 |
| Gwent County Construction Ltd | Builders | NP4 5BN | 2018 |
| Gwent Lime Ltd | Builders | NP4 8EY | 2014 |
| H & V Fusion and Drilling Ltd | Builders | NP11 5FE | 2001 |
| Hiley Trading Company Ltd | Builders | NP11 3LA | 2024 |
| Ian Prosser Building Services Ltd | Builders | NP11 7BN | 2021 |
| Ibex Heritage Ltd | Builders | NP11 7PZ | 2026 |
| Industrial Climbers Ltd | Builders | NP11 7PH | 2005 |
| Inside Out Building and Landscaping Ltd | Builders | NP11 7QP | 2016 |
| Inst-Halls Installation Services Ltd | Builders | NP4 9QQ | 2023 |
| Interclad Property Services Ltd | Builders | NP11 5AG | 2013 |
| Interclad Services Ltd | Builders | NP11 5AG | 2001 |
| Ip Industrial Services Ltd | Builders | NP4 8AB | 2024 |
| J Edwards Consultancy Ltd | Builders | NP4 5DT | 2026 |
| Jaffa Telecoms Ltd | Builders | NP11 3BH | 2025 |
| James Carpentry Ltd | Builders | NP11 3DQ | 2016 |
| Jefflyn Construction Ltd | Builders | NP4 0QE | 1990 |
| Jeffries Construction Ltd | Builders | NP4 9HT | 2014 |
| Jh Kitchens and Bathrooms Ltd | Builders | NP11 5EN | 2026 |
| Jjw Plant Training & Testing Ltd | Builders | NP11 3AJ | 2025 |
| Jl 18 Ltd | Builders | NP11 6GL | 2018 |
| Jones Construction Management Ltd | Builders | NP11 7QX | 2014 |
| Josh Ramsey Construction Ltd | Builders | NP4 0AW | 2021 |
| Joyner Electrical and Renewables Ltd | Builders | NP11 6AN | 2026 |
| Joyner Group Ltd | Builders | NP11 6AW | 2023 |
| Joyner P. A. (Cymru) Ltd | Builders | NP11 6AN | 1988 |
| Joyner P. A. Ltd | Builders | NP11 6AN | 1982 |
| K Technicians Ltd | Builders | NP11 7QU | 2024 |
| Kb Build & Rendering Solutions Ltd | Builders | NP4 8JL | 2022 |
| Keltic Property Services Ltd | Builders | NP4 8HB | 2026 |
| Kris Kp Services Ltd | Builders | NP11 3JJ | 2019 |
| L & M Ventilation Ltd | Builders | NP11 5AR | 2008 |
| L&J Developments Ltd | Builders | NP4 0JL | 2017 |
| L.P Cladding Ltd | Builders | NP11 6AW | 2015 |
| Limefield Properties Ltd | Builders | NP4 5DQ | 2016 |
| Lk Lifting Services Ltd | Builders | NP4 0PJ | 2025 |
| Lvc Construction Ltd | Builders | NP4 8JJ | 2022 |
| M J Pearce Building and Landscaping Ltd | Builders | NP4 7JQ | 2017 |
| Mezex Ltd | Builders | NP11 5ED | 2020 |
| Mike Mills Contracts Ltd | Builders | NP11 7NZ | 2019 |
| Mint Construction & Maintenance Ltd | Builders | NP4 0PZ | 2024 |
| Mk Lifting Ltd Ltd | Builders | NP4 8JQ | 2026 |
| Mm Rheoli Gwasanaethau Cyf | Builders | NP11 4PX | 2019 |
| Mp Garden Construction Company Ltd | Builders | NP11 4PT | 2025 |
| Msm Partitioning Ltd | Builders | NP4 0TL | 2006 |
| N E Evans Brickwork Ltd | Builders | NP11 5JU | 2019 |
| Ncr Renovations Ltd | Builders | NP4 0RW | 2023 |
| Node-Point Scaffolding Ltd | Builders | NP4 8HB | 2026 |
| Noodle Boilers & Renovations Ltd | Builders | NP11 4HE | 2025 |
| Oakdale Technical Services Ltd | Builders | NP11 3EH | 2004 |
| Oakwood Student Accommodation Ltd | Builders | NP11 4EG | 2013 |
| One Transformations Ltd | Builders | NP4 0HZ | 2019 |
| Onlinecad Project Management Ltd | Builders | NP4 0HZ | 2017 |
| Osg Property Renovations Ltd | Builders | NP11 5FS | 2018 |
| Parker Environmental Services Ltd | Builders | NP4 0TW | 1999 |
| Pe Site Solutions Ltd | Builders | NP4 7DQ | 2019 |
| Penland Developments Ltd | Builders | NP11 3NP | 1991 |
| Perimeter Ai Ltd | Builders | NP11 4LU | 2024 |
| Peter Cotter Welding Ltd | Builders | NP11 6JG | 2009 |
| Pheonix Group Ltd | Builders | NP4 8BQ | 2025 |
| Prb Construction Services Ltd | Builders | NP11 7LD | 2017 |
| Priddle Building Services Ltd | Builders | NP4 6TF | 2020 |
| Pro Build Torfaen Ltd | Builders | NP4 7HH | 2026 |
| R Sonny Ltd | Builders | NP4 9AN | 2019 |
| R U Safe Ltd | Builders | NP11 7HZ | 2020 |
| Rob Wilcox Ltd | Builders | NP11 5AU | 2015 |
| Roman Building Sevices Ltd | Builders | NP11 3JP | 2026 |
| Roofers Are Us Ltd | Builders | NP11 4PT | 2026 |
| Rosebush Homes Ltd | Builders | NP4 0XZ | 2019 |
| Rowanwood Developments Ltd | Builders | NP4 8SJ | 2020 |
| Rrj Diverse Developments Ltd | Builders | NP4 9QT | 2024 |
| Rtec Design and Build Ltd | Builders | NP4 9HU | 2012 |
| S O'Callaghan Building & Plastering Ltd | Builders | NP11 7QJ | 2018 |
| Sacree Standard Ltd | Builders | NP4 0TB | 2006 |
| Scribe Building Solutions Ltd | Builders | NP11 4FJ | 2021 |
| Sfi Building Consultants Ltd | Builders | NP11 5AR | 2026 |
| Smart Home Serve Ltd | Builders | NP11 3DR | 2024 |
| South Wales Builders Ltd | Builders | NP11 5JX | 2021 |
| South Wales Rendering Ltd | Builders | NP11 7ED | 2020 |
| South Wales Walls & Ceilings Ltd | Builders | NP4 6TF | 2026 |
| Sprayfoam Eco Ltd | Builders | NP11 6FY | 2014 |
| Stanley Builders Ltd | Builders | NP11 6NP | 2017 |
| Stealth Contractors Ltd | Builders | NP4 8RR | 2014 |
| Sw Plant Services Ltd | Builders | NP11 7QL | 2026 |
| Swift Kitchen Doors Ltd | Builders | NP11 4NQ | 2025 |
| Synadol Ltd | Builders | NP4 5LT | 2025 |
| Thorne Rainwater Systems Ltd | Builders | NP11 6DP | 2001 |
| Tmj Building & Maintenance Ltd | Builders | NP11 7FT | 2026 |
| Torfaen Partitions Ltd | Builders | NP4 8PE | 2018 |
| Torfaen Properties Ltd | Builders | NP4 9HR | 2007 |
| Total Construction (Builder) Ltd | Builders | NP4 9HU | 2026 |
| Tps Construction (South Wales) Ltd | Builders | NP11 7HZ | 2025 |
| Tredomen Ltd | Builders | NP11 7ED | 2015 |
| UK Retail Construction Ltd | Builders | NP11 6DN | 2020 |
| Watkins Property Services Ltd | Builders | NP4 7SH | 2013 |