 | CADEL SOLUTIONS AS | 918679235 | STAVANGER |
| CAERUS ARCHITECTS AS | 913406818 | OSLO |
| CALLE ANDERSEN MURMESTER AS | 918050183 | BÆRUM |
| CALLISTER RÅDGIVNING AS | 923346813 | TRONDHEIM |
| CANES AS | 981215095 | DRAMMEN |
| CA-NOR KJØLEINDUSTRI A/S | 946519995 | OSLO |
| CARA BYGG AS | 999599842 | ASKØY |
| CARL C FON AS | 982015812 | SANDEFJORD |
| CARL DOWNING | 911941686 | BERGEN |
| CARLEIF ELEKTRO AS | 943001375 | TRONDHEIM |
| CARLGUSTAV SOLUTIONS AB | 998241626 | |
| CARLING BYGG AS | 926907166 | SURNADAL |
| CARL ØISTEIN GRUE AS | 979548532 | NES |
| CARLSEN PÅ TAKET AS | 910995804 | BERGEN |
| CARLSENS ELEKTRO INSTALLASJON AS | 984082274 | SANDNES |
| CARLSEN VVS AS | 918373810 | ARENDAL |
| CARRIER REFRIGERATION NORWAY AS | 981495977 | OSLO |
| CASA BYGG AS | 989389009 | TØNSBERG |
| CASA BYGG P A KUCZYNSKI | 997372158 | MALVIK |
| CASPER HJELL AS | 979802412 | NORDRE FOLLO |
| CASTEL BYGG AS | 928084779 | TØNSBERG |
| CASTOR ENTREPRENØR AS | 988002623 | KARMØY |
| CASTOR MEKANISKE AS | 998354137 | OSLO |
| CATO BERNTSEN AS | 991052313 | LILLESTRØM |
| CATOGEOTEKNIKK SOLBERG | 994244280 | HOLMESTRAND |
| CATOS BETONGSAGING AS | 914117321 | HOLMESTRAND |
| CATO UTBJOA | 995176211 | HÅ |
| CAVERION NORGE AS | 959069743 | OSLO |
| CBA SERVICES AS | 990666342 | OSLO |
| CB MULTIDRIFT ENTREPRENØR AS | 927074087 | NITTEDAL |
| CB RØR AS | 924780142 | TRONDHEIM |
| C/C 60 BYGGMESTER BJØRN-ANDRE LANGMO | 976072804 | LARVIK |
| C/C 60 BYGG OG TAKST AS | 931909649 | SKIEN |
| CCD EIENDOMSTJENESTER AS | 920900984 | STAVANGER |
| CC ENTREPRENØR AS | 920826075 | LILLESTRØM |
| CCL ENGINEERING NORWAY AS | 912660664 | ÅLESUND |
| CELLIN BYGGTJENESTER AS | 920314376 | TROMSØ |
| CENCO AS | 916660480 | KRISTIANSAND |
| CENTER TAKST & PROSJEKT AS | 897869322 | SKIPTVET |
| CENTRUM BYGG HORTEN AS | 965004599 | HORTEN |
| CENTRUM ELEKTRISKE AS | 912609413 | OSLO |
| CENTRUM ELEKTRO AS | 913017579 | ARENDAL |
| CENTRUM RØR AS | 986484248 | STAVANGER |
| CENTRUM RØR AS | 937684975 | DRAMMEN |
| CENTRUM VVS AS | 959198861 | ARENDAL |
| 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 |