 | BERNT DAHL BYGGTJENESTER AS | 926820826 | NAMSOS |
| BERNT GUNDERSEN GRAVESERVICE AS | 981701275 | ÅSNES |
| BERNTSEN & BERNTSEN PROSJEKT AS | 875800582 | BERGEN |
| BERNTSEN BYGGSERVICE AS | 935145287 | TROMSØ |
| BERNTSEN PLAN & OPPMÅLING AS | 897819422 | RINGERIKE |
| BERRE ENTREPRENØR AS | 929992504 | NAMSOS |
| BERSTAD VÅPENØYA | 919251980 | INDRE FOSEN |
| BERTHELSEN BYGG AS | 925738964 | KRISTIANSAND |
| BERTHELSEN & VU AS | 915677908 | BERGEN |
| BERTIL JOHNSEN AS | 976895215 | TANA |
| BESIKT AS | 987037024 | HARSTAD |
| BESLAG OG BALKONGER AS | 980387968 | ASKØY |
| BESSEGGEN ARKITEKTER AS | 925252492 | OSLO |
| BEST-BYGG AS | 992548517 | MOLDE |
| BEST-HALL OY | 984706235 | |
| BETA VVS AS | 924454946 | OSLO |
| BETKA AS | 833366432 | ULLENSAKER |
| BETO BYGG AS | 968403249 | OSLO |
| BETONGARBEID AS | 812016482 | OSLO |
| BETONG CONSULT AS | 943847878 | BERGEN |
| BETONG DESIGN AS | 928963306 | HOLMESTRAND |
| BETONGDIMENSJONERING AS | 816346932 | TRONDHEIM |
| BETONGEKSPERTEN AS | 933910253 | KVINESDAL |
| BETONGENTREPRENØREN SUNDT & MORSTØL AS | 997475240 | BERGEN |
| BETONGGULV AS | 928928799 | BJØRNAFJORDEN |
| BETONGHUS ANS | 983741770 | ÅLESUND |
| BETONG KARLSEN AS | 915719589 | DRAMMEN |
| BETONGKOMPANIET AS | 925623415 | SARPSBORG |
| BETONG & MASKIN AS | 916947577 | ALVER |
| BETONGPARK AS | 999269648 | OSLO |
| BETONGSERVICE HAUGESUND AS | 997091124 | HAUGESUND |
| BETONG TECH AS | 996709590 | ÅLESUND |
| BETONG & TRE AS | 977352762 | SARPSBORG |
| BETONMA REHABILITERING AS | 917882274 | NORDRE FOLLO |
| BETONMAST ASKER OG BÆRUM AS | 882064352 | BÆRUM |
| BETONMAST INNLANDET AS | 985232644 | GJØVIK |
| BETONMAST ØSTFOLD AS | 993110906 | SARPSBORG |
| BETONMAST ROMERIKE AS | 993925314 | LILLESTRØM |
| BETONMAST RØSAND AS | 918510532 | AVERØY |
| BETONMAST TRØNDELAG AS | 859739822 | TRONDHEIM |
| BETTUM AS | 997897587 | SANDEFJORD |
| BF BYGG ALVDAL AS | 981099621 | ALVDAL |
| B FONDENES AUT RØRLEGGERFIRMA AS | 954623718 | BERGEN |
| BG BYGG OG BADEROM AS | 931036955 | ÅL |
| BGG ENTREPRENØR AS | 919728752 | ASKER |
| BGO ELEKTRO AS | 914466016 | BERGEN |
| BG SULDAL AS | 937550987 | SULDAL |
| B&G TUNNEL AS | 920036376 | EIGERSUND |
| B. GULLAKSEN MUR & FLIS AS | 930943711 | BERGEN |
| BH MASKIN AS | 990264155 | LEIRFJORD |
| BI BYGG AS | 935550408 | RINGSAKER |
| BICO BYGG OG INNREDNING AS | 929918487 | KRISTIANSAND |
| BIDNE BYGG AS | 936250084 | VOSS |
| BI ELEKTRO AS | 993517534 | BERGEN |
| BIGERA CONSTRUCTION AS | 936316948 | HAUGESUND |
| BILET'S RØRLEGGERSERVICE | 990706840 | FREDRIKSTAD |
| BILFINGER NORWAY AS | 988996564 | PORSGRUNN |
| BILLKVAM & FAGERHAUG AS | 933692817 | OSLO |
| BILSTAD BYGG AS | 986487549 | LUND |
| BIMAS AS | 930049042 | ULSTEIN |
| BIOLAND AS | 990832684 | GRAN |
| BIOVAC ENVIRONMENTAL TECHNOLOGY AS | 985660492 | LILLESTRØM |
| BIOWATER TECHNOLOGY AS | 991422374 | TØNSBERG |
| BIRGER MIETINEN AS | 891289162 | VADSØ |
| BIRGER PEDERSEN AS | 948638177 | NAMSOS |
| BIRGER POLLEN & CO AS | 980490963 | MOSS |
| BIRI RØRSERVICE AS | 931819011 | GJØVIK |
| BIRKELAND AS | 996662292 | SVEIO |
| BIRKELAND BYGG OG ANLEGG AS | 928909905 | BIRKENES |
| BIRKELAND ENTREPRENØRFORRETNING AS | 958848641 | GULEN |
| BIRKEN & CO AS | 988251437 | SANDNES |
| BISC AS | 914962048 | LIER |
| BI SERVICE AS | 914599911 | VESTRE TOTEN |
| BISLET RØR AS | 974400413 | OSLO |
| BISLET SNEKKER AS | 974380838 | NITTEDAL |
| BIT KONSEPT AS | 976937422 | ASKER |
| BITS ARKITEKT OG INGENIØR AS | 913079205 | TØNSBERG |
| BITUMARK BYGG AS | 818347642 | VINJE |
| BJARNE BERGHEIM AS | 924653175 | VESTRE SLIDRE |
| BJARNE LOFTHUS | 970295402 | TOKKE |
| BJARNE NESHEIM MASKIN AS | 991430075 | VINDAFJORD |
| BJARNE NORDTVEIT AS | 991438386 | VINDAFJORD |
| BJARNE ØSTERØY AS | 992777508 | LILLESAND |
| BJARTE HUUS MASKIN AS | 911720949 | ULLENSVANG |
| BJARTE LUND | 995595435 | SOGNDAL |
| BJB MASKIN AS | 973051687 | BERGEN |
| B & J BYGG AS | 924830565 | BODØ |
| BJELK AS | 925854743 | BERGEN |
| BJELKELAGET AS | 932210886 | RANA |
| BJELLAND AS | 984560443 | KLEPP |
| BJELLAND BYGG | 995132648 | VINDAFJORD |
| BJELLA OG MEDGARD AS | 995184389 | ÅL |
| BJ ENTREPRENØR AS | 927450690 | SARPSBORG |
| BJERCK ENTREPRENØR AS | 995076195 | KINN |
| BJERGABYGG AS | 979503172 | SANDNES |
| BJERKE BYGGESERVICE AS | 998209692 | NORDRE FOLLO |
| BJERKE LANDSKAP AS | 928995208 | RINGERIKE |
| BJERK ELEKTRO AS | 916175132 | VÅLER (ØSTFOLD) |
| BJERKE RØR AS | 918082476 | OSLO |
| BJERKE VENTILASJON AS | 986887768 | OSLO |