- Applied Ecological Services Ltd - DL14 0NG
- Atlas Washroom Systems - DL14 9PD
- Body Engineering Ltd - DL14 9QL
- Bondgate Electrical Distribution Ltd - DL14 7PE
- Century Demolition Ltd - DL14 9SN
- Conservatory and Window World Ltd - DL14 9AU
- DAF (Timber) Ltd - DL14 8NR
- Durham Box - DL14 9AD
- Ebac Industrial Products Limited - DL14 9AD
- Eldrett Finch Ltd - DL14 6XF
- Fablink Tank Systems Ltd - DL14 9NH
- GCL Lightboxes - DL14 8LG
- Harbro Supplies Ltd - DL14 6JG
- Hercules Security Fabrications Ltd - DL14 8NR
- Industracare - DL14 7EQ
- Ingram's Removers & Storers - DL14 6BQ
- Izumi Products UK Ltd - DL14 6XF
- J Beal Waste Metal Recycling - DL14 8EA
- L P C Components - DL14 8NR
- Plastic Mouldings Northern Ltd - DL14 6XB
- Prep-Rite UK Flooring Services Ltd - DL14 8AH
- R Lightfoot Electrical - DL14 0EN
- Stormking Windows - DL14 6XF
- Triton Controls - DL14 9SJ
- Ultegra Services - DL14 2AA
- Vinovium Associates Ltd - DL14 6XG
- Walton Industrial Containers Ltd - DL14 9AX
- Wear Valley Aerosols - DL14 6XF