 | BØRGE VEIEN | 926885782 | SKAUN |
| BORG OPPMÅLING AS | 925895350 | TRONDHEIM |
| BORG RADONSIKRING AS | 999294626 | SARPSBORG |
| BORG SVAKSTRØM AS | 987871040 | SARPSBORG |
| BORG TAKST AS | 829479672 | TIME |
| BORHAVEN ARKITEKTER AS | 913321677 | OSLO |
| BORO-BYGG A/S | 942587031 | OSLO |
| BORO-PROSJEKT AS | 942604106 | OSLO |
| BØ RØR & SANITÆR AS | 912977331 | BØ (NORDLAND) |
| BØRRE OLSEN | 970320334 | ENEBAKK |
| BØRRE SVINDAL LARSEN TOTALENTREPRENØR AS | 925077364 | LARVIK |
| BØRSA BYGG AS | 916605412 | SKAUN |
| BØRSET OG HALTLI BYGGSERVICE AS | 928738167 | TRONDHEIM |
| BORSHEIM AS | 981585658 | KLEPP |
| BØRVE BORCHSENIUS ARKITEKTER AS | 910980246 | PORSGRUNN |
| BØ SYSTEMFORSKALLING AS | 936239803 | BJØRNAFJORDEN |
| BOTAKST AS | 979229569 | TIME |
| BOTNEBYGG AS | 995494361 | HOLMESTRAND |
| BOTN ELEKTRO AS | 927154676 | RANA |
| BOTNEN ENTREPRENØR AS | 937219369 | KVAM |
| BOTNEVIK SAMDRIFT DA | 988714429 | BJØRNAFJORDEN |
| BOTOLV BERG BRÅTALIEN | 969234114 | ÅL |
| B-O TORLAND | 921014473 | TIME |
| BØ-TRE AS | 976188527 | BØ (NORDLAND) |
| BOTTEN BYGG AS | 930309397 | NORD-ODAL |
| BØTTGER AS | 988299847 | KRISTIANSAND |
| BOVIGO AS | 927045095 | HEMNES |
| BO WIIK BYGG AS | 998830028 | OSLO |
| BOXLY AS | 996111946 | FREDRIKSTAD |
| BOXS ARKITEKTSTUDIO AS | 928978648 | ASKER |
| BP3 PROSJEKT AS | 913031725 | NARVIK |
| BP ENERGI AS | 895382752 | TROMSØ |
| BP ENTREPRENØR AS | 912628752 | TRONDHEIM |
| BRAA OG SØRVÅG BYGG AS | 962246931 | TRONDHEIM |
| BRA ARKITEKTER AS | 826490152 | OSLO |
| BRAATHEN LANDSKAPSENTREPRENØR AS | 981291751 | ENEBAKK |
| BRA-BYGG RUNE GJERDE HANSEN | 997155793 | ÅLESUND |
| BRÆIN FJELLSPRENGING AS | 921644787 | TØNSBERG |
| BRA ELEKTRO AS | 925827215 | HARAM |
| BRÆNDES RØRLEGGERFORRETNING AS | 833241192 | VOLDA |
| BRAFAS AS | 913261089 | ASKER |
| BRAKON AS | 970918701 | PORSGRUNN |
| BRANDBU BYGGSERVICE AS | 890716512 | OSLO |
| BRANDSBERG DAHL AS | 939700463 | STAVANGER |
| BRANNINGENIØREN AS | 990283753 | SKIEN |
| BRANNKONSULT AS | 912679217 | OSLO |
| BRANNKONSULT SØR AS | 983975151 | VENNESLA |
| BRANNRÅDGIVEREN AS | 928730476 | STAVANGER |
| BRANNRÅDGIVERNE AS | 998626471 | TRONDHEIM |
| BRANNRÅDGIVNING AS | 924496983 | KRISTIANSAND |