 | CONSTRAVIA AS | 919534370 | OSLO |
| CONSTRUCTION FIXXXER WOJCIECH ZACHARA | 935645506 | ULLENSAKER |
| CONSTRUCTION TEAM NORWAY AS | 915449476 | FREDRIKSTAD |
| CONSTRUCTUM AS | 916263406 | FREDRIKSTAD |
| CONSULT1 AS | 916538804 | SANDNES |
| CONSULT GRUPPEN AS | 925747424 | KRISTIANSAND |
| CONTRACTOR BYGG AS | 911644835 | ALSTAHAUG |
| CONTRE AS | 928997944 | GAUSDAL |
| CONTUR AS | 927612372 | KRISTIANSAND |
| CONTURO AS | 931081705 | TØNSBERG |
| CONVA AS | 931051857 | HORTEN |
| CON-WOOD-STEEL AS | 925407399 | ASKØY |
| COOLTEAM AS | 988373354 | OSLO |
| COPLAN AS | 916139101 | SANDEFJORD |
| CORE TECHNOLOGY AS | 913783670 | STAVANGER |
| CORE TECHNOLOGY OSLO AS | 929237889 | OSLO |
| CORIGO AS | 926909223 | OSLO |
| CORRECT BYGG AS | 913042344 | BÆRUM |
| COSMIC BYGG AS | 939429794 | SANDEFJORD |
| COVEI AS | 927790440 | BERGEN |
| COWI AS | 979364857 | OSLO |
| CRAFT ENTREPRENØR AS | 919827270 | ØYGARDEN |
| CR BYGG AS | 926501976 | TØNSBERG |
| CREATIV BYGG AS | 998450179 | FÆRDER |
| CREDO BOLIG AS | 990832587 | HAMAR |
| CRESCO EIENDOM AS | 987579900 | NORDRE FOLLO |
| CRITICAL INFRASTRUCTURE SERVICES AS | 927454939 | LØRENSKOG |
| CRS ELEKTRO AS | 928180034 | MOSS |
| CSP AS | 914539552 | ALTA |
| CS VARME OG ENERGI TEKNIKK AS | 897175622 | BÆRUM |
| CURVE STUDIO AS | 928603180 | FÆRDER |
| CW RØR AS | 825346392 | NITTEDAL |
| DABYGG AS | 921360371 | ELVERUM |
| DACO NORD AS | 921211015 | BÆRUM |
| DAFRO AS | 990118124 | SKAUN |
| DAGALI BIL & MASKIN Lars Aasberg | 870966512 | HOL |
| DAGALI VVS AS | 998396506 | HOL |
| DAG ARNE NILSEN AVD. KONGSBERG AS | 895595012 | KONGSBERG |
| DAGESTAD MEKANISKE VERKSTED AS | 970975969 | RINGSAKER |
| DAGFINN OLSEN AS | 934263138 | GJØVIK |
| DAGFIN SKAAR AS | 982310482 | KRISTIANSAND |
| DAGS MASKIN AS | 950429992 | SYKKYLVEN |
| DAHLBO GROUP AS | 935032105 | TØNSBERG |
| DAHLE BLIKK AS | 976081684 | TRONDHEIM |
| DAHLE MASKIN AS | 926403591 | STRAND |
| DAHLE MEK. VERKSTED AS | 989461346 | BERGEN |
| DAHLEN OPPMÅLING AS | 930671029 | RINGSAKER |
| DAHLEN VVS AS | 923875778 | LEVANGER |
| DAHLE RØRSERVICE AS | 996872181 | INDRE FOSEN |
| DAHL & JENSEN BYGG AS | 918330844 | NITTEDAL |
| DAHLMAN ANLEGG OG BORING AS | 933498204 | HOLMESTRAND |
| DAHLMANN BYGGTEKNIKK | 912282627 | ØVRE EIKER |
| DAHL-SUNDAL INGENIØRTJENESTER AS | 998182824 | ØVRE EIKER |
| DAKARK AS | 976598407 | GISKE |
| DAK & INGENIØRTJENESTER AS | 998902134 | ASKER |
| DALE ANLEGG AS | 913849493 | SKIEN |
| DALE ANLEGGSGARTNER AS | 811810622 | HARSTAD |
| DALE MASKIN AS | 986724265 | OPPDAL |
| DALEN KRISTOFFER | 970302360 | FITJAR |
| DALEN RØR AS | 923107363 | TOKKE |
| DALE RØR AS | 974527413 | SUNNFJORD |
| DALSBYGDA GRAVESERVICE ANS | 988707813 | OS (INNLANDET) |
| DALSEGG RØRLEGGERSERVICE AS | 912155420 | TYNSET |
| DAMFJELL AS | 833120522 | SOGNDAL |
| DAMI AS | 998031605 | ASKER |
| DAMMYR BYGG AS | 990927200 | FREDRIKSTAD |
| DAN BLIKK AS | 968850601 | OSLO |
| DANFLIS AS | 915454771 | LØRENSKOG |
| DANIEL JAKOBSEN MASKIN AS | 919638036 | ALTA |
| DANIEL PLURA SNEKKERSERVICE AS | 823131542 | HITRA |
| DANIELSEN BYGG AS | 934951565 | KLEPP |
| DANIELSEN OG MURIQI BYGG AS | 927172259 | KRISTIANSAND |
| DANOR ELEKTRO AS | 982891523 | OSLO |
| DANO TAK AS | 935722675 | ØYGARDEN |
| DARAS BYGG AS | 835938182 | NANNESTAD |
| DARK ARKITEKTER AS | 913659023 | OSLO |
| DARK BERGEN AS | 924729686 | BERGEN |
| DARK FREDRIKSTAD AS | 916322925 | FREDRIKSTAD |
| DARK STAVANGER AS | 921629559 | STAVANGER |
| DATEK INSTALLASJON AS | 916110529 | OSLO |
| DATELCO AS | 968366076 | OSLO |
| DAVID ANDERSEN | 970429409 | HOLMESTRAND |
| DAVID BYGG AS | 975966844 | ASKER |
| DAVIK ALLSERVICE v/Bjørn Forsberg | 988664030 | BREMANGER |
| DAVOR KNEZEVIC | 989292145 | SKAUN |
| DAXARO NORGE AS | 925580910 | OSLO |
| DBB AS | 930564788 | HAUGESUND |
| DB BYGG AS | 920254179 | INDRE ØSTFOLD |
| DBYGG AS | 911839768 | LUNNER |
| DE BYGG AS | 927033747 | SANDEFJORD |
| DECO NORGE AS | 916204078 | MOSKENES |
| DE ELEKTRO AS | 989119621 | OSLO |
| DEGERUD TØMRERSERVICE AS | 997817982 | NESODDEN |
| DEGREE OF FREEDOM AS | 996013448 | OSLO |
| DEGVOLD BYGG ANS | 969976110 | ØSTRE TOTEN |
| DEKO BYGG AS | 926751867 | OSLO |
| DE LILLA AS | 989987364 | OSLO |
| DEMCO AS | 931596187 | BERGEN |
| DEMOTEC AS | 997843878 | LARVIK |
| DERBITAK MALCO AS | 918750592 | KRISTIANSAND |