| A One Builders | 01748 822947 | | 49 Racecourse Road, Gallowfields Trading Estate, Richmond, DL10 4TG |  Map & Directions |
| Acomb Construction Ltd | 01748 850210 | | 63 Mercury Road , Gallowfields Trading Estate , Richmond, DL10 4TQ | | Map & Directions |
| Edgar Lawson Ltd | 01325 377111 | | Barton Grange, Barton, Richmond, DL10 6HS | | Map & Directions |
| R B A Moody Bros Ltd | 01609 772207 | | Standard Way Industrial Estate, Northallerton, DL6 2XA | | Map & Directions |
| Newholme Construction | 01388 746203 | | 8 Kingsmead, Willington, Crook, DL15 0DN | | Map & Directions |
| John Weir | 01388 833191 | | 11 South View, Evenwood, Bishop Auckland, DL14 9QS | | Map & Directions |
| John Barker | 01388 609211 | | 87 Woodhouse Lane, Bishop Auckland, DL14 6JU | | Map & Directions |
| Clive Barker | 01325 469864 | | 107 Cleveland Terrace, Darlington, DL3 8HX | | Map & Directions |
| Riverdale Homes | 01833 660003 | | Parsons Lonnen, Barnard Castle, DL12 8ST | | Map & Directions |
| Buckhams Of Brancepeth Ltd | 01388 745531 | | 5 Brancepeth Terrace, Willington, Crook, DL15 0ES | | Map & Directions |
| R Manners | 01388 774030 | | Dovecot Hill, South Church Enterprise Park, Bishop Auckland, DL14 6XW | | Map & Directions |
| Ryan & Bolland | 01325 288312 | | 89 Neville Road, Darlington, DL3 8NQ | | Map & Directions |
| D Hall | 01325 378512 | | The Old Station, East Cowton, Northallerton, DL7 0DT | | Map & Directions |
| Masterbuild | 01388 817793 | | 34-36 Durham Street, Spennymoor, DL16 7AT | | Map & Directions |
| P B Building Services | 01325 461651 | | 168 Carmel Road North, Darlington, DL3 8RH | | Map & Directions |
| J Mccurdy | 01325 481114 | | 69 Lanethorpe Crescent, Darlington, DL1 4SH | | Map & Directions |
| C P C Construction & Interiors | 01325 466998 | | 7 Barnes Road, Darlington, DL3 9BH | | Map & Directions |
| Simpson Building & Joinery Ltd | 01388 665509 | | 33 Watling Road, Bishop Auckland, DL14 6RP | | Map & Directions |
| Durham Bros | 01325 488767 | | 64 Brinkburn Avenue, Darlington, DL3 0JW | | Map & Directions |
| Surtees Construction Co Ltd | 01388 819650 | | Prospect House, 68 High Street, Spennymoor, DL16 6DD | | Map & Directions |
| D Oakley Ltd | 01609 772136 | | 68 Romanby Road, Northallerton, DL7 8NQ | | Map & Directions |
| P & A Harrison Builders Ltd | 01325 730132 | | Bourne Lea, Winston Gate, Darlington, DL2 3RR | | Map & Directions |
| Grainger Builders Ltd | 01677 470194 | | Well Scar Quarry, Well, Bedale, DL8 2QL | | Map & Directions |
| Charge Bros | 01325 730229 | | Main Road , Gainford, Darlington, DL2 3DY | | Map & Directions |
| Oxbridge Builders | 01325 337427 | | Darlington Road, Sadberge, Darlington, DL2 1SA | | Map & Directions |
| T Willoughby Ltd | 01609 772062 | | Standard Way Industrial Estate, Northallerton, DL6 2XE | | Map & Directions |
| J R Walker | 01833 640580 | | Sycamore Cottage, Mickleton, Barnard Castle, DL12 0JR | | Map & Directions |
| Sewell & Craggs | 01388 746649 | | 8 West End Terrace, Willington, Crook, DL15 0HW | | Map & Directions |
| John Lewis | 01609 882765 | | Bellvue Farm, Deighton, Northallerton, DL6 2SJ | | Map & Directions |
| H Skeen & Son | 01609 881215 | | Kew Park, Hornby Road, Appleton Wiske, Northallerton, DL6 2AF | | Map & Directions |
| G A Property Maintenance & Building Services | 01740 654056 | | 8 Napier Court, Ferryhill, DL17 8PZ | | Map & Directions |
| A B Roofing & Building Contractors | 01325 265280 | | 3 Beech Road, Darlington, DL1 3HQ | | Map & Directions |
| Saddington Builders | 01325 353699 | | Morton Park, Yarn Road, Darlington, DL1 4PJ | | Map & Directions |
| Blackburn Marshall Construction Ltd | 01325 352109 | | Wooler Street, Darlington, DL1 1RQ | | Map & Directions |
| J W Stenson & Co Ltd | 01325 468249 | | 52 Duke Street, Darlington, DL3 7AJ | | Map & Directions |
| Smk Construction | 01388 810324 | | Unit 4 Coulson Street, Spennymoor, DL16 7RS | | Map & Directions |
| Brian Lidster | 01325 352202 | | 19 Newlands Road, Darlington, DL3 9JL | | Map & Directions |
| T C Reinforcing Ltd | 01325 286462 | | 57 Nickstream Lane, Darlington, DL3 0DQ | | Map & Directions |
| D Lumley | 01677 422724 | | The Paddocks, Leeming Bar, Northallerton, DL7 9DG | | Map & Directions |
| Bowman Construction & Moorview Windows | 01388 764446 | | The Old School Works, High Grange, Crook, DL15 8AT | | Map & Directions |
| Kier Northern | 01740 651314 | | Thrislington Industrial Estate, West Cornforth, Ferryhill, DL17 9EU | | Map & Directions |
| T T Dinsdale & Son | 01969 667718 | | Chapel Lane Cottage, The Gaits, Gayle, Hawes, DL8 3RU | | Map & Directions |
| T T Tunstall | 01833 628260 | | Kilmond View, Bowes, Barnard Castle, DL12 9HH | | Map & Directions |
| Amec Group Ltd | 01325 744400 | | Amec House, Yarm Road, Darlington, DL1 4JN | | Map & Directions |
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