| 3 Alarms Ltd | Builders | DL17 8JH | 2005 |
| A Blacklock Floor Screeding Ltd | Builders | DL14 8LE | 2025 |
| A G Building Solutions Ltd | Builders | DL14 6XG | 2023 |
| Ac Building Services (Ne) Ltd | Builders | DL14 7EQ | 2026 |
| Accurate Fencing & Groundwork Services Ltd | Builders | DL14 6XG | 2023 |
| Ae Construction Services Ltd | Builders | DL17 0PY | 2026 |
| Ajm Projects Ltd | Builders | DL16 6JN | 2015 |
| Akm Wind Services Ltd | Builders | DL17 9EL | 2026 |
| Alan Rosemurgey Drystone Walling Ltd | Builders | DL14 7EQ | 2025 |
| Andrew Evans Industrial Roofing and Cladding Ltd | Builders | DL14 8YP | 2017 |
| Ap Brickwork & Construction Ltd | Builders | DL16 7BY | 2024 |
| Appletree Building Contractors Ltd | Builders | DL17 8JH | 2016 |
| Armiger Joinery Ltd | Builders | DL14 9TF | 2004 |
| Armour Clad UK Ne Ltd | Builders | DL14 7AX | 2026 |
| Aspire Home Improvements N.E Ltd | Builders | DL14 6XG | 2019 |
| B & A Mini Digger Hire Ltd | Builders | DL14 6HX | 2011 |
| Bailey Concrete Pumping Ltd | Builders | DL14 6HX | 2001 |
| Baltic Wood Ltd | Builders | DL16 6EA | 2021 |
| Bayhaven Ltd | Builders | DL17 8QE | 2000 |
| Bc Timber Framers Ltd | Builders | DL14 9LA | 2022 |
| Blr Restorations Ltd | Builders | DL14 8RJ | 2019 |
| Bowling Home Improvements Ltd | Builders | DL17 8DA | 2019 |
| Brothers Excavation Groundwork Service Ltd | Builders | DL17 9AT | 2023 |
| Brownson & Sons Ltd | Builders | DL14 7AP | 2023 |
| Building and Joinery Services Ltd | Builders | DL17 8JH | 2026 |
| Buildpro Solution Service Ltd | Builders | DL17 8PW | 2024 |
| By Form Construction Ltd | Builders | DL14 6XG | 2023 |
| Byers Groundworks Ltd | Builders | DL14 0SH | 2004 |
| C & T Construction Services Ltd | Builders | DL14 7BQ | 2024 |
| Caa Commercial Management Ltd | Builders | DL16 6LS | 2025 |
| Cad Innovation Group Ltd | Builders | DL14 9EX | 2018 |
| Carrs Fencing Ltd | Builders | DL16 7HY | 2020 |
| Caskade Ltd | Builders | DL14 9SF | 2006 |
| Cathedral Masonry Inspections Ltd | Builders | DL14 6EE | 2018 |
| Ccl Access and Coatings Ltd | Builders | DL16 6QG | 2020 |
| Cdi High Access Ltd | Builders | DL17 9AT | 2017 |
| Chris Lee Kitchen Installations Ltd | Builders | DL14 6LW | 2022 |
| Cla Bespoke Flooring Solutions Ltd | Builders | DL16 6QG | 2024 |
| Conservatory & Window World Ltd | Builders | DL14 9AU | 2002 |
| Construct Group Design & Build Ltd | Builders | DL17 8JH | 2025 |
| Construct North East Ltd | Builders | DL17 8JH | 2023 |
| Cook&Pearson Joinery Services Ltd | Builders | DL17 0LE | 2015 |
| Corbridge & Northumberland Handyman Ltd | Builders | DL17 0DT | 2026 |
| Ct Fencing & Landscaping Ltd | Builders | DL14 6XG | 2023 |
| D F Barratt Ltd | Builders | DL14 6HX | 2003 |
| D S Steelworks Ltd | Builders | DL16 6QG | 2020 |
| Dell Roofing Services Ltd | Builders | DL14 9TF | 2017 |
| Dent Multi Services Ltd | Builders | DL16 6EL | 2025 |
| Dlb Rope Access Ltd | Builders | DL16 6QG | 2018 |
| Dop Elevator Co Ltd | Builders | DL16 7LD | 2024 |
| Drew Sams Brickwork & Stonework Contractors Ltd | Builders | DL14 0RG | 2022 |
| Dw Floor Screed Ltd | Builders | DL14 8NS | 2019 |
| E.P.I.C. Scheduling Ltd | Builders | DL16 6JU | 2012 |
| East Shaw Renewable Energy Services Ltd | Builders | DL16 6TN | 2026 |
| Ecodrill Utilities Ltd | Builders | DL17 0JX | 2013 |
| Ej Sitepro Services Ltd | Builders | DL16 6JL | 2024 |
| Epd Building and Joinery Ltd | Builders | DL16 7LJ | 2024 |
| Epd Building Ltd | Builders | DL16 7LJ | 2024 |
| Esf Access Ltd | Builders | DL14 6XG | 2023 |
| Evans Bespoke Builds Ltd | Builders | DL14 0JQ | 2022 |
| F.M.K. Services Ltd | Builders | DL14 6PQ | 2007 |
| Fairhurst & Son Ltd | Builders | DL14 7EQ | 2021 |
| Fcsl Compliance Ltd | Builders | DL14 7TL | 2024 |
| Flic (Ne) Ltd | Builders | DL17 0EB | 2024 |
| Fpwc (Surveys)Ltd Ltd | Builders | DL14 6JT | 2024 |
| Fpwc Ltd | Builders | DL14 6EN | 2023 |
| G & A Joinery Specialists Ltd | Builders | DL14 9TF | 2017 |
| G Calvert Masonry and Joinery Ltd | Builders | DL14 6HX | 2024 |
| G Matthews Property Solutions Ltd | Builders | DL14 6XG | 2021 |
| G Mckenzie Groundwork'S Ltd | Builders | DL16 6QG | 2021 |
| G R Martin Ltd | Builders | DL14 6HX | 2008 |
| Gary Thompson Steelwork Ltd | Builders | DL14 6EE | 2025 |
| Gavin Lund Contracts Ltd | Builders | DL14 8PB | 2015 |
| Gb1 Services Ltd | Builders | DL16 6SF | 2015 |
| Glassline Installations Ltd | Builders | DL16 7AN | 2026 |
| Go Cladding Services Ltd | Builders | DL17 8DA | 2014 |
| Green Horizon Renewables Ne Ltd | Builders | DL14 8AH | 2025 |
| Hanjamemi Group Ltd | Builders | DL17 8JH | 2022 |
| Hazeldene Fencing Ltd | Builders | DL14 6XG | 2014 |
| Hedley Construction (North East) Ltd | Builders | DL16 6XP | 2011 |
| Hls Installations Ne Ltd | Builders | DL14 9EX | 2023 |
| Homes By Trafalgar (Sedgefield) Ltd | Builders | DL14 9JU | 2022 |
| Homes By Trafalgar Durham Ltd | Builders | DL14 9JU | 2018 |
| Humble Handyman Services Ltd | Builders | DL14 6EQ | 2023 |
| Huntley & Cockrill Construction Ltd | Builders | DL16 7LE | 2025 |
| Hymas & Hall Ltd | Builders | DL14 0AS | 1985 |
| J & A Roofing Ltd | Builders | DL14 7GA | 2005 |
| J Carrigan Roofing & Cladding Ltd | Builders | DL14 9EF | 2018 |
| J D Jowett Ltd | Builders | DL17 8JH | 2017 |
| J Lingard Site Services Ltd | Builders | DL17 8JH | 2018 |
| J M Jackson Construction Ltd | Builders | DL16 6YP | 2003 |
| J.Stevens Access Ltd | Builders | DL17 0HS | 2025 |
| Jcal Installations Ltd | Builders | DL14 0AU | 2020 |
| Jm Davies Projects Ltd | Builders | DL14 6HX | 2008 |
| Jm Industries North East Ltd | Builders | DL14 9FH | 2025 |
| Jmb Commercial Ltd | Builders | DL17 8JH | 2023 |
| Jrb Partitions Ltd | Builders | DL14 6HX | 2022 |
| K Minnis Construction Ltd | Builders | DL14 6XG | 2016 |
| Kelly Construction Services Ltd | Builders | DL14 6XG | 2023 |
| Kenley Homes (Etherley Meadows) Ltd | Builders | DL14 9AZ | 2025 |
| Kenley Homes Ltd | Builders | DL14 9AZ | 2008 |
| Kenny Construction (Durham) Ltd | Builders | DL14 6XG | 2015 |
| Kitchen Design (North East) Ltd | Builders | DL17 9AT | 2008 |
| Kwg Steel Ltd | Builders | DL16 6LZ | 2019 |
| L Brown Installations Ltd | Builders | DL17 8JH | 2018 |
| L Leafe Construction Ltd | Builders | DL16 6QG | 2024 |
| Lcgh Ltd | Builders | DL14 6XG | 2018 |
| Leary'S Property Development Ltd | Builders | DL17 0HA | 2019 |
| Leven Wrought Iron & Fabrication Ltd | Builders | DL14 7EQ | 2010 |
| Ljm Renovations Ltd | Builders | DL14 6XG | 2024 |
| Ljs Plotworks Ltd | Builders | DL17 9EN | 2025 |
| Lrt Groundworks Ltd | Builders | DL17 9AA | 2023 |
| Luther Commissioning Services Ltd | Builders | DL16 6QG | 2019 |
| Luxe Driveways Ltd | Builders | DL16 6PA | 2025 |
| M & R Developments & Contractors Ltd | Builders | DL14 6HX | 2009 |
| M D Property Solutions Ltd | Builders | DL17 8UA | 2018 |
| Madi Construction Management Ltd | Builders | DL17 0FA | 2024 |
| Marc Jemmeson Access & Construction Ltd | Builders | DL17 9AT | 2014 |
| Marc Roe Construction Ltd | Builders | DL14 6HX | 2023 |
| Mc Grace Ltd | Builders | DL16 6JF | 2026 |
| Mdj Utilities Ltd | Builders | DL17 8EA | 2025 |
| Meddle Estates Ltd | Builders | DL16 6BB | 2019 |
| Michael Dowson Construction Ltd | Builders | DL14 9QW | 2011 |
| Mineworkings Remediation Specialists Ltd | Builders | DL17 9AN | 2014 |
| Mixrova Ltd | Builders | DL14 8LS | 2025 |
| Monks Integrated Services Ltd | Builders | DL17 8DB | 2026 |
| Moorview Windows Ltd | Builders | DL14 6XG | 2003 |
| Mould Eradication Ltd | Builders | DL14 7HS | 2023 |
| N & T Armstrong Building Ltd | Builders | DL14 9LF | 2024 |
| N D T Welding Ltd | Builders | DL14 0DL | 1996 |
| National Plasterboard Systems Ltd | Builders | DL14 7NB | 2018 |
| National Roofing Contractors Ltd | Builders | DL14 8RJ | 2025 |
| Nedco Contracts (N.E) Ltd | Builders | DL14 6HX | 2010 |
| Neil Bage Kitchens & Bedrooms Ltd | Builders | DL16 6TL | 2022 |
| Nesbit Property Ltd | Builders | DL17 0AW | 2021 |
| Nevern Projects Ltd | Builders | DL17 8JH | 2005 |
| Nmb Partitions Ltd | Builders | DL14 6HX | 2001 |
| North East Safety Netting Ltd | Builders | DL16 7RS | 2017 |
| Northstone Groundworks Ltd | Builders | DL14 8SP | 2026 |
| Nrt Design Services Ltd | Builders | DL14 6RP | 2025 |
| P Moody Building Contracts Ltd | Builders | DL14 6XG | 2022 |
| Paramac Fabrications Ltd | Builders | DL14 9UY | 2023 |
| Pb Construction Ltd | Builders | DL16 6QG | 2025 |
| Perfect N.E. Profiles Ltd | Builders | DL14 6SY | 2008 |
| Play Bond Ltd | Builders | DL14 6AR | 2022 |
| Power Up North East Ltd | Builders | DL14 6XG | 2024 |
| Premier Fluid Solutions Ltd | Builders | DL17 8JH | 2005 |
| Premium Park Homes Ltd | Builders | DL16 6QF | 2021 |
| Prestige Clad Coatings Ltd | Builders | DL14 7EQ | 2015 |
| Pro-Line Partitions and Ceilings Ltd | Builders | DL16 7FY | 2013 |