|
| 4520 | Building repairs, residential (except single-family), general contractors | |
| 4520 | Building repairs, single family, general contractors | |
| 4520 | Built-up roofing, installation | |
| 4520 | Bunkhouses, construction | |
| 4520 | Bus terminals, construction | |
| 4520 | Bush depots and camps, construction | |
| 4520 | Cable installation (hydro, telephone, telegraph, underground and marine) | |
| 4520 | Cable laying, communication | |
| 4520 | Cable splicing service, non-electrical, contractors | |
| 4520 | Cable television line construction, contractors | |
| 4520 | Cafeterias, construction | |
| 4520 | Caisson construction | |
| 4520 | Caisson drilling, contractors | |
| 4520 | Camp cookeries, construction | |
| 4520 | Camps, bush, construction | |
| 4520 | Canal construction, contractors | |
| 4520 | Canals and related navigation facilities, construction | |
| 4520 | Canneries, construction | |
| 4520 | Carpentry work, contractors | |
| 4520 | Carpentry, framing | |
| 4520 | Carpentry, rough and framing, contractor | |
| 4520 | Causeway, construction | |
| 4520 | Cedar shakes, installation | |
| 4520 | Ceiling beams (wooden), rough installation | |
| 4520 | Cement finishing | |
| 4520 | Cement foundation blocks, installation | |
| 4520 | Cement plants, construction | |
| 4520 | Cement work | |
| 4520 | Cesspool construction, contractors | |
| 4520 | Channel construction, general contractors | |
| 4520 | Channel cutoff construction, general contractors | |
| 4520 | Chemical complex or facilities construction, general contractors | |
| 4520 | Chemical plants, industrial or heavy, construction | |
| 4520 | Chimney building and repairing | |
| 4520 | Churches and other religious buildings, construction | |
| 4520 | Cinder blocks, installation | |
| 4520 | Cinemas, construction | |
| 4520 | Civic centre construction, general contractors | |
| 4520 | Cladding, installation (except glass) | |
| 4520 | Clean room construction, general contractors | |
