 | BÆRUMS VERK RØRLEGGERBEDRIFT AS | 995961032 | BÆRUM |
| BÆRUMS VERK TØMRERMESTERFIRMA AS | 824812802 | BÆRUM |
| BÆRUM TAKST ERIK IVERSEN | 915348068 | BÆRUM |
| BÆRUM TAKTEKKING & BLIKKENSLAGER AS | 987579811 | BÆRUM |
| BÆVRE BYGG | 921314558 | TRONDHEIM |
| BAGN OG KROGH AS | 932016028 | BÆRUM |
| BAGN VARME & SANITÆR AS | 991236317 | SØR-AURDAL |
| BAGO BYGG AS | 914381843 | AURSKOG-HØLAND |
| BAGSTEVOLD VVS AS | 989188666 | OSLO |
| BAKKE AS | 912548732 | AURSKOG-HØLAND |
| BAKKEBY BYGG AS | 923172165 | ALTA |
| BAKKE - BYGG AS | 927068575 | KRISTIANSAND |
| BAKKE EL-INSTALLASJON AS | 952438360 | GJØVIK |
| BAKKE LEILIGHETER AS | 995665700 | AURSKOG-HØLAND |
| BAKKE MUR OG VARME AS | 997030877 | FÆRDER |
| BAKKEN BYGG AS | 996861074 | HOL |
| BAKKEN BYGG OG TØMRERMESTER AS | 988384216 | ASKER |
| BAKKEN & MAGNUSSEN AS | 930868507 | TRONDHEIM |
| BAKKENS VERKSTED AS | 978687903 | SENJA |
| BAKKENS VVS AS | 997417488 | KRISTIANSAND |
| BAKKEN VVS AS | 879904382 | HEIM |
| BAKKERUD AS | 924750448 | NESBYEN |
| BAKKESMIA AS | 989817353 | ØRSTA |
| BALANSE BYGG AS | 993865109 | STORD |
| BALANSE HUS AS | 916989601 | OSLO |
| BALCO AB | 984997353 | OSLO |
| BALKONGENTREPRENØREN AS | 994734652 | BERGEN |
| BALKONGTEAM AS | 979546483 | OSLO |
| BALSFJORD RØRSERVICE AS | 834149052 | BALSFJORD |
| BALTMAX AS | 917763364 | ÅS |
| BAMBLE RØR AS | 968182846 | BAMBLE |
| B.A MUR OG FLIS AS | 921964994 | SARPSBORG |
| BANESERVICE AS | 986392912 | OSLO |
| BANGS OPPMÅLING AS | 831292652 | LILLEHAMMER |
| BANTOS AS | 995878526 | SANDEFJORD |
| BAR BAKKE LANDSKAPSARKITEKTER AS | 990379386 | OSLO |
| BARENTS-KLIMA AS | 928236234 | VADSØ |
| BARERØR AS | 911891530 | VÆRØY |
| BARK ARKITEKTER AS | 889133252 | STAVANGER |
| B ARK AS | 957845339 | BERGEN |
| BARKAUSKAS AMS BYGGSERVICE | 831554762 | SKIEN |
| BARKEDALEN AS | 921792921 | FREDRIKSTAD |
| BARLUND JENS AS | 981686314 | LILLEHAMMER |
| BARTNES AS | 914851386 | TRONDHEIM |
| BAS ARKITEKTER AS | 983196608 | SARPSBORG |
| BASIS ARKITEKTER AS | 977278333 | KRISTIANSAND |
| BASIS BYGG AS | 884550432 | TRONDHEIM |
| BASSENGSPESIALISTEN AS | 916162979 | MOSS |
| BÅSUM BORING AS | 976138805 | KRØDSHERAD |
| BATHROOM WORKSHOP AS | 920735878 | STAVANGER |