| 3 Alarms Ltd | Builders | DL17 8JH | 2005 |
| A & B Industrial Cleaning Ltd | Cleaners | DL17 9AA | 2006 |
| A Star Installations Ltd | Builders | DL4 1ES | 2024 |
| Aall Electrical Services Ltd | Electricians | DL17 9BB | 2019 |
| Aaron Contract Electrical Ltd. | Electricians | DL17 9BQ | 2015 |
| Ace Electrical Group Ltd | Electricians | DL17 8JH | 2026 |
| Adidaphat Ltd | Hair & beauty | DL4 1DT | 2025 |
| Ae Construction Services Ltd | Builders | DL17 0PY | 2026 |
| Aesthetics By Olivia Ltd | Hair & beauty | DL4 2JS | 2019 |
| Ahs (Site Services) Ltd | Plumbing & heating | DL4 1QB | 2025 |
| Ahs (Specialist Services) Ltd | Plumbing & heating | DL4 1QB | 2014 |
| Ajm Groundworks Ne Ltd | Builders | DL4 2DT | 2024 |
| Akm Wind Services Ltd | Builders | DL17 9EL | 2026 |
| Alan Reed Ltd | Garages & mechanics | DL4 1QB | 1999 |
| Aldersons Garage Ltd | Garages & mechanics | DL4 1NL | 2022 |
| Alfa-Stucco Ltd | Plasterers | DL17 9AT | 2019 |
| Alpha Carpentry & Conversions Ltd | Joiners & carpenters | DL17 8DR | 2020 |
| Alpine Window Systems Ltd. | Glaziers | DL4 1QB | 1998 |
| Anj Builders Ne Ltd | Builders | DL4 1LB | 2023 |
| Anthonys Motor Services (Teesside) Ltd | Garages & mechanics | DL17 8JH | 2026 |
| Appletree Building Contractors Ltd | Builders | DL17 8JH | 2016 |
| At Roofing & Cladding (Ne) Ltd | Builders | DL4 2BN | 2022 |
| Bayhaven Ltd | Builders | DL17 8QE | 2000 |
| Bellwoods Windows and Doors Ltd | Joiners & carpenters | DL17 0QW | 2015 |
| Bk Roofing Services Ltd | Roofers | DL17 0PY | 2026 |
| Blocktech Group Ltd | Gardeners & landscapers | DL4 2DN | 2025 |
| Blossom and Crown Ltd | Hair & beauty | DL4 1DU | 2019 |
| Border Autos Ltd | Garages & mechanics | DL17 8JH | 2020 |
| Boris Build Ltd | Builders | DL4 1JB | 2023 |
| Bowling Home Improvements Ltd | Builders | DL17 8DA | 2019 |
| Brodi'S Pipework Services Ltd | Plumbing & heating | DL17 8QX | 2024 |
| Brothers Excavation Groundwork Service Ltd | Builders | DL17 9AT | 2023 |
| Building and Joinery Services Ltd | Builders | DL17 8JH | 2026 |
| Buildpro Solution Service Ltd | Builders | DL17 8PW | 2024 |
| Butterfield Refurbishments Ltd | Builders | DL4 1AZ | 2023 |
| Cach Ltd | Hair & beauty | DL17 8LA | 2010 |
| Cbm Building Ne Ltd | Builders | DL4 2JZ | 2026 |
| Cdi High Access Ltd | Builders | DL17 9AT | 2017 |
| Chalevee Cleaning Ltd | Cleaners | DL17 8PW | 2025 |
| Chameleon Spray Systems UK Ltd | Painters & decorators | DL17 8BH | 2021 |
| Change Plastering and Preservation Ltd | Plasterers | DL4 2JG | 2024 |
| Clad K Sheeting Services Ltd | Roofers | DL4 1EY | 2014 |
| Class Cut Barbers Gents Ltd | Hair & beauty | DL4 2JB | 2025 |
| Comdec Ltd | Painters & decorators | DL4 1JB | 2016 |
| 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 |
| 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 |
| Cs Electrics (Ne) Ltd | Electricians | DL4 2QN | 2020 |
| Cutting Loose Ltd | Hair & beauty | DL17 8NR | 2003 |
| D Plant Plumbing & Heating Ltd | Plumbing & heating | DL17 8JH | 2025 |
| D&J Plumbing and Heating(Durham) Ltd | Plumbing & heating | DL17 0RT | 2020 |
| Danssam Ltd | Hair & beauty | DL17 8LA | 2001 |
| Defence Drives & Patios Ltd | Gardeners & landscapers | DL4 2DN | 2026 |
| Diy Roofing Solutions Ltd | Roofers | DL17 9EL | 2025 |
| Dm'S Aesthetics Ltd | Hair & beauty | DL17 8DR | 2023 |
| Dollheads Hair & Beauty Ltd | Hair & beauty | DL4 1DT | 2016 |
| Dolphin Leisure Ltd | Hair & beauty | DL17 8LA | 2013 |
| Dragonfly Window Cleaning Ltd | Cleaners | DL17 8BG | 2025 |
| Durham Bus and Coach Ltd | Garages & mechanics | DL17 8LH | 2009 |
| Durham Landscapes Ltd | Gardeners & landscapers | DL17 8HR | 2026 |
| Dw Commercials [Ne] Ltd | Garages & mechanics | DL17 9AT | 2024 |
| Ecodrill Utilities Ltd | Builders | DL17 0JX | 2013 |
| Electric Services Direct Ltd | Electricians | DL17 8JY | 2025 |
| Eps Electrical Services Ltd | Electricians | DL17 8BD | 2019 |
| Fc'S O&G Services Ltd | Cleaners | DL17 8LP | 2025 |
| Ferryhill Nails & Spa 8 Ltd | Hair & beauty | DL17 8JN | 2026 |
| Ferryhill Roofing Contractors Ltd | Roofers | DL4 2QN | 2015 |
| Fired Up (Ne) Ltd | Plumbing & heating | DL17 8JH | 2020 |
| First Choice Cleaning Services Ltd | Cleaners | DL17 0DG | 2025 |
| Flawless Finish Facilities Ltd | Cleaners | DL17 8JH | 2025 |
| Flic (Ne) Ltd | Builders | DL17 0EB | 2024 |
| Fort Cleaning Services Ltd | Cleaners | DL17 0DG | 2025 |
| Frith Engineering Ltd | Electricians | DL4 2LA | 2024 |
| G.T. Commercials (Ne) Ltd | Garages & mechanics | DL17 8JH | 2023 |
| Gleeson Roofing Ne Ltd | Roofers | DL17 0DU | 2026 |
| Go Cladding Services Ltd | Builders | DL17 8DA | 2014 |
| Graham Caygill Ltd | Roofers | DL4 1ES | 2016 |
| Hamilton Roofing & Cladding Ltd | Roofers | DL17 8HZ | 2010 |
| Hanjamemi Group Ltd | Builders | DL17 8JH | 2022 |
| Hayfields Contracting Ltd | Gardeners & landscapers | DL4 1HY | 2007 |
| Hma Ventilation Services Ltd | Plumbing & heating | DL17 0PB | 2006 |
| Huckleberry Roofing Ltd | Roofers | DL4 2DN | 2026 |
| Humbles Garage Ltd | Garages & mechanics | DL4 1EB | 2013 |
| I & M Engineering Consultants UK Ltd. | Builders | DL4 1DW | 2009 |
| Istanbul Golden Barber Ltd | Hair & beauty | DL17 8JP | 2022 |
| J D Jowett Ltd | Builders | DL17 8JH | 2017 |
| J Lingard Site Services Ltd | Builders | DL17 8JH | 2018 |
| J.Stevens Access Ltd | Builders | DL17 0HS | 2025 |
| Jack Coupe & Sons Ltd | Builders | DL4 1HG | 2010 |
| Jds Automotive Ltd | Garages & mechanics | DL4 2RA | 2024 |
| Jmb Commercial Ltd | Builders | DL17 8JH | 2023 |
| Jr Joinery North East Ltd | Joiners & carpenters | DL17 0BE | 2018 |
| Kc Cladding (Ne) Ltd | Builders | DL4 1JA | 2025 |
| Kelly’S Commercial & Domestic Cleaning Services Ltd | Cleaners | DL17 9NR | 2024 |
| Kitchen Design (North East) Ltd | Builders | DL17 9AT | 2008 |
| L Brown Installations Ltd | Builders | DL17 8JH | 2018 |
| L&S Industrial Cladding Ltd | Builders | DL4 2RG | 2019 |
| Leadbetter Staircases and Joinery Services Ltd | Joiners & carpenters | DL4 1QB | 2022 |
| Leary'S Property Development Ltd | Builders | DL17 0HA | 2019 |
| Lee Thompson Cladding Ltd | Roofers | DL4 1ET | 2016 |
| Liam Kavanagh Ltd | Roofers | DL4 1BG | 2016 |
| Ljb Decorators Ltd | Painters & decorators | DL17 9LZ | 2025 |
| Ljs Plotworks Ltd | Builders | DL17 9EN | 2025 |
| Lrt Groundworks Ltd | Builders | DL17 9AA | 2023 |
| Lt Brickworks Ltd | Builders | DL4 1JQ | 2018 |
| M D Property Solutions Ltd | Builders | DL17 8UA | 2018 |
| M Dixon Interiors Ltd | Joiners & carpenters | DL17 0DY | 2020 |
| Madi Construction Management Ltd | Builders | DL17 0FA | 2024 |
| Marc Jemmeson Access & Construction Ltd | Builders | DL17 9AT | 2014 |
| Marco Building Services Ltd | Builders | DL4 2JP | 2017 |
| Marylyn'S Unisex Salon Ltd | Hair & beauty | DL17 0EJ | 2003 |
| Mc Industrial Roofing Ltd | Roofers | DL4 2JZ | 2026 |
| Mcnay Building & Joinery Ltd | Joiners & carpenters | DL17 8JH | 2002 |
| Mdj Utilities Ltd | Builders | DL17 8EA | 2025 |
| Me Electrics Ltd | Electricians | DL17 8LY | 2003 |
| Merco (Tyre Management) Ltd | Garages & mechanics | DL17 8LN | 2006 |
| Mika'S Lashes & Aesthetic Ltd | Hair & beauty | DL4 1PP | 2026 |
| Mineworkings Remediation Specialists Ltd | Builders | DL17 9AN | 2014 |
| Mirror Finish Car Body Repairs Ltd | Garages & mechanics | DL17 8JH | 2020 |
| Mitre Joinery & Carpentry Ltd | Joiners & carpenters | DL4 2JZ | 2022 |
| Monks Integrated Services Ltd | Builders | DL17 8DB | 2026 |
| Moos Motors Ltd | Garages & mechanics | DL17 0QF | 2020 |
| Mp Superior Designs Ltd | Joiners & carpenters | DL17 9BH | 2009 |
| Mr Steamer Cleaning Services Ltd | Cleaners | DL17 8NJ | 2024 |
| Mws Heating & Plumbing Ltd | Plumbing & heating | DL17 8JH | 2013 |
| Nesbit Property Ltd | Builders | DL17 0AW | 2021 |
| Nevern Projects Ltd | Builders | DL17 8JH | 2005 |
| Og Campers Ltd | Joiners & carpenters | DL4 1QB | 2024 |
| Oxley-Haines Ltd | Joiners & carpenters | DL4 2QT | 2023 |
| Parnaby Surfacing & Groundworks Ltd | Groundworks & demolition | DL17 9JQ | 2017 |
| Patcharins Aesthetics Ltd | Hair & beauty | DL17 8JY | 2021 |
| Poultry Panels Ltd | Joiners & carpenters | DL17 8DW | 2018 |
| Power Tech (Northern) Ltd | Electricians | DL17 0PS | 2009 |
| Premier Fluid Solutions Ltd | Builders | DL17 8JH | 2005 |
| Propercleanwindows Ltd | Cleaners | DL17 8NX | 2025 |
| Quality Surface Coatings Ltd | Painters & decorators | DL4 2QN | 2026 |
| Quicktan Sunbed Hire Ltd | Hair & beauty | DL17 8LA | 2006 |
| R.Bucks’ Brakes & Repair Ltd | Garages & mechanics | DL17 0HX | 2023 |
| Race and Lingard Developments Ltd | Builders | DL17 8JH | 2025 |
| Rapid Response Drain Care Ltd | Cleaners | DL17 8LH | 2015 |
| Rb Utilities (North) Ltd | Builders | DL17 0QH | 2025 |
| Reg Motors Ltd | Garages & mechanics | DL17 0NU | 2017 |
| Rejuve and Enhance Aesthetics Ltd | Hair & beauty | DL4 2GU | 2025 |
| Renov Ltd | Builders | DL4 2DD | 2024 |
| Richards Water Solutions Ltd | Builders | DL4 2QN | 2011 |