| A Blacklock Floor Screeding Ltd | Builders | DL14 8LE | 2025 |
| A G Building Solutions Ltd | Builders | DL14 6XG | 2023 |
| A Star Installations Ltd | Builders | DL4 1ES | 2024 |
| Ac Building Services (Ne) Ltd | Builders | DL14 7EQ | 2026 |
| Accurate Fencing & Groundwork Services Ltd | Builders | DL14 6XG | 2023 |
| Ah Windtech Ltd | Builders | DL2 2ZF | 2026 |
| Ajm Groundworks Ne Ltd | Builders | DL4 2DT | 2024 |
| Alan Rosemurgey Drystone Walling Ltd | Builders | DL14 7EQ | 2025 |
| Andrew Evans Industrial Roofing and Cladding Ltd | Builders | DL14 8YP | 2017 |
| Anj Builders Ne Ltd | Builders | DL4 1LB | 2023 |
| 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 |
| At Roofing & Cladding (Ne) Ltd | Builders | DL4 2BN | 2022 |
| Auckland Developments Ltd | Builders | DL14 8EP | 2025 |
| B & A Mini Digger Hire Ltd | Builders | DL14 6HX | 2011 |
| Bailey Concrete Pumping Ltd | Builders | DL14 6HX | 2001 |
| Bba North East Ltd | Builders | DL2 2PT | 2024 |
| Bc Timber Framers Ltd | Builders | DL14 9LA | 2022 |
| Bh Blinds & Shutters Ltd | Builders | DL2 1QR | 2024 |
| Blr Restorations Ltd | Builders | DL14 8RJ | 2019 |
| Boris Build Ltd | Builders | DL4 1JB | 2023 |
| Brownson & Sons Ltd | Builders | DL14 7AP | 2023 |
| Butterfield Refurbishments Ltd | Builders | DL4 1AZ | 2023 |
| By Form Construction Ltd | Builders | DL14 6XG | 2023 |
| Byers Groundworks Ltd | Builders | DL14 0SH | 2004 |
| C & T Construction Services Ltd | Builders | DL14 7BQ | 2024 |
| C&C Construction Consultants Ltd | Builders | DL2 1FE | 2024 |
| Cad Innovation Group Ltd | Builders | DL14 9EX | 2018 |
| Caskade Ltd | Builders | DL14 9SF | 2006 |
| Cathedral Masonry Inspections Ltd | Builders | DL14 6EE | 2018 |
| Cbm Building Ne Ltd | Builders | DL4 2JZ | 2026 |
| Cherry Tree Home Improvements Ltd | Builders | DL2 1QZ | 2025 |
| Chris Lee Kitchen Installations Ltd | Builders | DL14 6LW | 2022 |
| Cm Door Services Ltd | Builders | DL2 2WS | 2025 |
| Cna Rigging and Lifting Solutions Ltd | Builders | DL2 1AX | 2026 |
| Complete Home Inspections Guaranteed Ltd | Builders | DL2 2FD | 2024 |
| Conservatory & Window World Ltd | Builders | DL14 9AU | 2002 |
| Coupe Group Ltd | Builders | DL4 1HG | 2010 |
| Coupe Line Ltd | Builders | DL4 1HG | 1990 |
| Cp Masonry Ltd | Builders | DL4 1NB | 2024 |
| Crown Construction (Ne) Ltd | Builders | DL4 1LT | 2013 |
| Csm Bolting Ltd | Builders | DL2 1GJ | 2025 |
| Ct Fencing & Landscaping Ltd | Builders | DL14 6XG | 2023 |
| D B Site Services Ltd | Builders | DL2 2JS | 1998 |
| D F Barratt Ltd | Builders | DL14 6HX | 2003 |
| Darlington & Tees Blinds Ltd | Builders | DL2 2WB | 2026 |
| Dell Roofing Services Ltd | Builders | DL14 9TF | 2017 |
| Design4 Ltd | Builders | DL2 2UF | 2019 |
| Dkg Project Management Ltd | Builders | DL2 2FU | 2026 |
| Doggy Access Ltd | Builders | DL2 1LW | 2017 |
| Drew Sams Brickwork & Stonework Contractors Ltd | Builders | DL14 0RG | 2022 |
| Dw Floor Screed Ltd | Builders | DL14 8NS | 2019 |
| Dynamic Engineering (Ne) Ltd | Builders | DL14 9JU | 2025 |
| Elm Integrated Services Ltd | Builders | DL2 2QY | 2016 |
| Esf Access Ltd | Builders | DL14 6XG | 2023 |
| F & E Trade Services Ltd | Builders | DL2 2ZL | 2025 |
| F.M.K. Services Ltd | Builders | DL14 6PQ | 2007 |
| Fairhurst & Son Ltd | Builders | DL14 7EQ | 2021 |
| Fcsl Compliance Ltd | Builders | DL14 7TL | 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 R Martin Ltd | Builders | DL14 6HX | 2008 |
| Gary Thompson Steelwork Ltd | Builders | DL14 6EE | 2025 |
| Gavin Lund Contracts Ltd | Builders | DL14 8PB | 2015 |
| Graham Everett Rope Access Ltd | Builders | DL2 1HJ | 2014 |
| Green Horizon Renewables Ne Ltd | Builders | DL14 8AH | 2025 |
| Gsm Maintenance Solutions Ltd | Builders | DL2 3DE | 2017 |
| Gti Installation Ltd | Builders | DL2 2AT | 2023 |
| Handy Property Maintenance Ltd | Builders | DL2 1SR | 2025 |
| Harpers Construction & Groundworks Ltd | Builders | DL2 1JH | 2015 |
| Hazeldene Fencing Ltd | Builders | DL14 6XG | 2014 |
| 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 |
| Hymas & Hall Ltd | Builders | DL14 0AS | 1985 |
| I & M Engineering Consultants UK Ltd. | Builders | DL4 1DW | 2009 |
| Industrial Coatings North East Ltd | Builders | DL2 1UL | 2015 |
| J & A Roofing Ltd | Builders | DL14 7GA | 2005 |
| J Carrigan Roofing & Cladding Ltd | Builders | DL14 9EF | 2018 |
| J. Arkle Ltd | Builders | DL2 1UA | 2019 |
| Jack Coupe & Sons Ltd | Builders | DL4 1HG | 2010 |
| Jcal Installations Ltd | Builders | DL14 0AU | 2020 |
| Jig UK Drainage Solutions Ltd | Builders | DL2 1RJ | 2021 |
| Jjw Roofing and Building Ltd | Builders | DL2 1QL | 2025 |
| Jm Davies Projects Ltd | Builders | DL14 6HX | 2008 |
| Jm Industries North East Ltd | Builders | DL14 9FH | 2025 |
| Jr Heights Ltd | Builders | DL14 8HZ | 2025 |
| Jrb Partitions Ltd | Builders | DL14 6HX | 2022 |
| K Minnis Construction Ltd | Builders | DL14 6XG | 2016 |
| Kc Cladding (Ne) Ltd | Builders | DL4 1JA | 2025 |
| 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 |
| L Graney Plumbing & Heating Ltd | Builders | DL2 2DW | 2021 |
| L&M Race Paving Ltd | Builders | DL2 3LA | 2017 |
| L&S Industrial Cladding Ltd | Builders | DL4 2RG | 2019 |
| Lcgh Ltd | Builders | DL14 6XG | 2018 |
| Leven Wrought Iron & Fabrication Ltd | Builders | DL14 7EQ | 2010 |
| Ljm Renovations Ltd | Builders | DL14 6XG | 2024 |
| Lt Brickworks Ltd | Builders | DL4 1JQ | 2018 |
| M & R Developments & Contractors Ltd | Builders | DL14 6HX | 2009 |
| Marco Building Services Ltd | Builders | DL4 2JP | 2017 |
| Merrybent Project Management Ltd. | Builders | DL2 2LF | 2004 |
| Michael Dowson Construction Ltd | Builders | DL14 9QW | 2011 |
| Mixrova Ltd | Builders | DL14 8LS | 2025 |
| Mmxs Ltd | Builders | DL14 8UT | 2025 |
| Moorview Windows Ltd | Builders | DL14 6XG | 2003 |
| Mould Eradication Ltd | Builders | DL14 7HS | 2023 |
| Mw Rail Ltd | Builders | DL2 1FJ | 2026 |
| Mwb Services Ltd | Builders | DL2 2JH | 2022 |
| 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 |
| Nmb Partitions Ltd | Builders | DL14 6HX | 2001 |
| Northquest Renovations Ltd | Builders | DL4 2DD | 2023 |
| 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 |
| Partek Site Services Ltd | Builders | DL2 2LF | 2014 |
| Perfect N.E. Profiles Ltd | Builders | DL14 6SY | 2008 |
| Perspective Blinds Ltd | Builders | DL2 3US | 2026 |
| Plasterboard Recycling Group Ltd | Builders | DL2 3RR | 2019 |
| Play Bond Ltd | Builders | DL14 6AR | 2022 |
| Power Up North East Ltd | Builders | DL14 6XG | 2024 |
| Prestige Clad Coatings Ltd | Builders | DL14 7EQ | 2015 |
| Prime Property By Daniel Jeffs Ltd | Builders | DL2 1GP | 2025 |
| Proassemble Ltd | Builders | DL2 2BX | 2025 |
| Pyramid Architectural Design Ltd | Builders | DL14 6XG | 2018 |
| Q9 Cladding Solutions Ltd | Builders | DL2 3PX | 2011 |
| R & D (Durham) Ltd | Builders | DL14 9TF | 2025 |
| R W Fencing Ltd | Builders | DL2 2XT | 2008 |
| Raby Holdings Ltd | Builders | DL14 9LA | 2025 |
| Rawry Ltd | Builders | DL14 0SH | 2009 |
| Recovery Technical Management Ltd | Builders | DL14 6XG | 2011 |
| Redfern Building Services Ltd | Builders | DL14 6XB | 1990 |
| Renov Ltd | Builders | DL4 2DD | 2024 |
| Resolve Contracts Ltd | Builders | DL14 7AX | 2024 |
| Resolve Group UK Ltd | Builders | DL14 7AX | 2025 |
| Reuben Smith (Plant Hire) Ltd | Builders | DL14 6HX | 1979 |
| Rich Tone Maintenance Ltd | Builders | DL14 6XG | 2025 |
| Richards Water Solutions Ltd | Builders | DL4 2QN | 2011 |
| Robson Granite Worksurfaces Ltd | Builders | DL2 2TT | 2017 |