| C E RAWLINGS | — | — | — | Open → |
| C GOODMAN & C PITTARD | — | — | — | Open → |
| C HANNING & M SCRAFTON | — | — | — | Open → |
| C HAYES | — | — | — | Open → |
| C HAYES | — | — | — | Open → |
| C HEAD | — | — | — | Open → |
| C J Construction Ltd | Selby | — | — | Open → |
| C J Magee | Malton | — | — | Open → |
| C LAX | — | — | — | Open → |
| C LAX LTD | — | — | — | Open → |
| C PHILIPS | — | — | — | Open → |
| C Preston | Hemingbrough | — | — | Open → |
| C R REYNOLDS CONSTRUCTION LTD | — | — | — | Open → |
| C SMITH | — | — | — | Open → |
| C Taylor | Nr Selby | — | 01757709457 | Open → |
| C THOMPSON | — | — | — | Open → |
| C W Joinery Services | Leeds | cwjoinery@gmail.com | — | Open → |
| C& D ENGINEERING SEVICES LTD | — | — | — | Open → |
| C.I Liversage & Partners | — | — | — | Open → |
| c/o Horsham District Council | Horsham | — | — | Open → |
| CA Architectural | York | — | — | Open → |
| CADITAL | Pontefract | dave@cadital.co.uk | David Mothershaw tel. 01977 646869 | Open → |
| Caerphilly County Borough Council | Blackwood | — | 01495 235343 | Open → |
| Caerphilly County Borough Council | Blackwood | — | 01495 235343 | Open → |
| Calderdale Metropolitan Borough Council | Halifax | building.control@calderdale.gov.uk | x | Open → |