 | CENTRUM RØR AS | 937684975 | DRAMMEN |
| CENTRUM RØR AS | 986484248 | STAVANGER |
| CENTRUM VVS AS | 959198861 | ARENDAL |
| CFA RØRLEGGERBEDRIFT AS | 997749472 | GJERDRUM |
| C.F. MØLLER NORGE AS | 986519963 | OSLO |
| CF SVENDSEN AS | 820553292 | AURSKOG-HØLAND |
| CH BYGG AS | 922337292 | KRISTIANSAND |
| C.HELLING EIENDOM OG TØMRERTJENESTER AS | 925566241 | OSLO |
| CHEM-CON AS | 919305541 | SANDNES |
| CHILLI BAD AS | 916312644 | OSLO |
| CH PROSJEKT AS | 980400956 | OSLO |
| CHRICON AS | 980485013 | KRISTIANSAND |
| CHRISTENSEN CC RØRSERVICE AS | 916005024 | SANDEFJORD |
| CHRISTENSEN RØYR AS | 932742470 | SOGNDAL |
| CHRISTER SUNDSTRØM AS | 913456432 | ALTA |
| CHRISTIANIA BYGG PROSJEKT AS | 917781532 | OSLO |
| CHRISTIANIA ENTREPRENØR AS | 990132747 | OSLO |
| CHRISTIANIA ENTREPRENØR OG MASKIN AS | 915651666 | OSLO |
| CHRISTIANIA RØRLEGGERBEDRIFT AS | 912069370 | OSLO |
| CHRISTIANSEN & CHRISTIANSEN BYGG AS | 997993209 | SKIEN |
| CHRISTIANSEN OG KJENNER AS | 915949665 | ASKER |
| CHRISTIAN SUNDBY ARKITEKTER AS | 917445389 | BÆRUM |
| CHRISTIE & OPSAHL AS | 974353547 | MOLDE |
| CHRISTOFFER ALEX FJELD-EIKEN | 988535842 | MOSS |
| CHRISTOFFER DANIELSEN AS | 926393146 | ØYGARDEN |
| CHR M VESTRHEIM AS | 917154678 | BERGEN |
| CH STADLER KFT | 989688030 | |
| CIBES LIFT NORGE AS | 913117972 | ASKER |
| CIRKELBYGG AS | 991632735 | ASKER |
| CITY RØR AS | 989714023 | OSLO |
| CIVIL ENGINEERING CONSULTANCY AS | 991851607 | ÅSNES |
| CK NOR BYGG AS | 912418804 | SANDEFJORD |
| CLAESSEN & JOHNSEN AS | 994593390 | SUNNDAL |
| CLASSIC BAD AS | 929618793 | BERGEN |
| CLAUSSEN ARKITEKTER | 997861949 | OSLO |
| CL BYGG & EIENDOM AS | 917283109 | HOLMESTRAND |
| CLEVE BROCH AS | 998990122 | BÆRUM |
| C&M BRANNSIKRING AS | 912854892 | TROMSØ |
| C&M FORSKALING AS | 914916887 | STAVANGER |
| CM-MASKIN AS | 933217043 | AUSTEVOLL |
| C M MATHIESEN & CO AS | 960007247 | OSLO |
| CMS BYGG OG ANLEGG AS | 923107975 | OSLO |
| CMV HOMES AS | 999524281 | OSLO |
| C MYRLID AS | 915547877 | BJØRNAFJORDEN |
| CN MASKIN AS | 898848132 | ULSTEIN |
| CODE ARKITEKTUR AS | 979395175 | OSLO |
| COERA AS | 932615223 | OSLO |
| Combi Hus A/S | 947266594 | SANDNES |
| COMFORT AKERSHUS RØR AS | 984028865 | LILLESTRØM |
| COMFORT BJØRN SEEM AS | 916340796 | GRONG |