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| JON TORE SAND AS | 819154082 | ASKER |
| JØRA BYGG HUS OG HYTTER AS | 933913562 | GAUSDAL |
| JORA MASKIN AS | 981888057 | DOVRE |
| JORDALEN ENTREPRENØR AS | 975930017 | VOSS |
| JORDALEN MASKIN AS | 895454532 | VOSS |
| JORDAN VVS AS | 913649214 | ENEBAKK |
| JORDBREKK FORSKALING AS | 989298631 | SOLA |
| JORDET ELEKTRO AS | 989368737 | OSLO |
| JORDET GRUSTAK AS | 982193370 | ORKLAND |
| JØRGEN SAND BYGG | 930697613 | ALVER |
| JØRGENSEN AS | 930827142 | OSLO |
| JØRGENSEN OG JØRGENSEN AS | 932086158 | FREDRIKSTAD |
| JØRGEN ULLERN BYGG & ANLEGG AS | 926882406 | HOLE |
| JØRN KONRAD BYE AS | 998014867 | KRØDSHERAD |
| JØRN NIKOLAISEN | 996784754 | HAMAR |
| JØRNSEN TAK AS | 971644486 | DRAMMEN |
| JØRN SKJØRDAL | 970551468 | HOLMESTRAND |
| JØRN STORBERGET AS | 998560179 | LIER |
| JØRN STORM THORSTENSEN KONSULENTTJENESTER | 864268382 | FÆRDER |
| JØRN WALSETH | 970132619 | LØRENSKOG |
| JOSA BYGG AS | 919653175 | TRONDHEIM |
| JOS BYGG AS | 919515384 | EIDSVOLL |
| JOS EIENDOMSSERVICE AS | 986321144 | NORDRE FOLLO |
| JOSTEIN MYGE AS | 979505043 | TYSVÆR |
| JOSTEIN RØNSEN ARKITEKTER AS | 975795942 | OSLO |
| JOSTEIN SKJETNE AS | 918029141 | KRISTIANSUND |
| JOSVANGER ELEKTRO AS | 971002700 | LUSTER |
| JOTNE ANKERS AS | 980558630 | HALDEN |
| JOTUNHEIMEN BYGG AS | 922943893 | LOM |
| JO W TOFTDAHL | 953855313 | GRAN |
| JP ENTREPRENØR AS | 925321494 | HORTEN |
| JR ANLEGG AS | 934763505 | OSLO |
| JR BYGG AS | 930600954 | KRISTIANSAND |
| JR MASKIN DA | 992566132 | ÅRDAL |
| JR RØRSERVICE AS | 917321884 | NORDRE FOLLO |
| JS BYGG & INTERIØR AS | 917482780 | BERGEN |
| JSG AS | 930470864 | OSLO |
| JSI INSTALLASJON AS | 993129038 | SØR-VARANGER |
| JS MASKIN JAN SVELA AS | 829797402 | TIME |
| JSM RØRSERVICE AS | 983583830 | BERGEN |
| J S SERVICE JAN SVELA AS | 981454723 | TIME |
| JSTARKITEKTER AS | 991181369 | TRONDHEIM |
| J TANGERÅS MURERSERVICE AS | 989114778 | OSTERØY |
| J&T BYGG AS | 924467320 | TROMSØ |
| JT BYGG & EIENDOM AS | 928625540 | OSLO |
| JTK RØRSERVICE AS | 914950910 | TØNSBERG |
| JTM BYGG AS | 930641383 | NAMSOS |
| JULE INDUSTRIER AS | 918473076 | INDERØY |
| JULIAN KOBUS ARKITEKTKONTOR | 914330165 | BERGEN |
| JUULS RØRSERVICE AS AUT RØRLEGGERFIRMA | 943919607 | OSLO |
| JV ANLEGG AS | 912123049 | SARPSBORG |
| K10 BYGG KENNETH LAVIK | 911779854 | BERGEN |
| K2 ELEKTRO AS | 912110117 | OSLO |
| K3 MONTASJE AS | 919579226 | OSLO |
| KAA BYGG-TAKST AS | 934823133 | FREDRIKSTAD |
| KAARE MORTENSEN AS | 956813301 | LARVIK |
| KAARE MORTENSEN BUSKERUD AS | 993417270 | DRAMMEN |
| KAARE MORTENSEN OSLO/AKERSHUS AS | 990892229 | DRAMMEN |
| KAARUD AS | 913068920 | OSLO |
| KAASA MASKIN AS | 936537960 | MIDT-TELEMARK |
| KAAS BYGG AS | 916815166 | MALVIK |
| KAASE BYGG AS | 930341622 | TØNSBERG |
| KAAS STAALBYGG NORGE AS | 996835510 | ARENDAL |
| KÅBULAND OG STOKKELAND ELEKTRO AS | 990689660 | VENNESLA |
| KA BYGG AS | 986726934 | OVERHALLA |
| KAHOLMEN AS | 924519401 | FREDRIKSTAD |
| KAI & ANLEGG AS | 961783623 | STRAND |
| KAI OG ANLEGG ENTREPRENØR AS | 966335645 | SORTLAND |
| KAI TORE NÆSS | 912769321 | AURSKOG-HØLAND |
| KÅLÅS BYGG AS | 940215897 | ALVER |
| KALD & VARM INSTALLASJON AS | 917848645 | LILLESTRØM |
| KALEIDOSCOPE NORDIC AS | 914609283 | BERGEN |
| KALLAND AS | 989864882 | HAUGESUND |
| KALLE OG KJETILS RØR AS | 824329222 | STAVANGER |
| KALMAR BYGG AS | 930896799 | FÆRDER |
| K A LØVIK AS | 999153941 | BERGEN |
| KALSTVEIT BYGG AS | 997268288 | VINDAFJORD |
| KALTVEDT VVS AS | 920040357 | SANDEFJORD |
| KALVE MASKIN AS | 918444599 | AUSTEVOLL |
| KALVENES VVS AS | 876717832 | BERGEN |
| KAMA RØRLEGGER AS | 920845479 | ØVRE EIKER |
| KAMBENOR AS | 924450452 | SULA |
| KAM BYGG AS | 923959718 | OPPDAL |
| KAMELÅSÅ AS | 915480233 | ÅLESUND |
| KAMO ENT. AS | 920016049 | ÅLESUND |
| KAMPEN OG JENSEN BYGG- OG EIENDOMSUTVIKLING AS | 914094356 | DRAMMEN |
| K. AMUNDSEN MASKIN AS | 897882442 | BERGEN |
| KANMER ARBEIDSINKLUDERING AS | 930492086 | NES |
| KAN RØR AS | 918537503 | HARSTAD |
| KANSTAD TRELAST AS | 980577511 | LØDINGEN |
| KAPH ENTREPRENØR AS | 914949149 | STAVANGER |
| KAPI AS | 916346794 | ASKER |
| KAPLAK AS | 979807988 | TRONDHEIM |
| KARASJOK VVS AS | 987767308 | KARASJOK |
| KÅRE ERIKSEN AS | 980149099 | ARENDAL |
| KÅRE HAGEN & CO AS | 927732777 | OSLO |
| KÅRE HALLONEN AS | 994748343 | SØR-VARANGER |
| KÅRE K KRISTENSEN AS | 968010506 | ALTA |
| KÅRE STENBERG AS | 913834070 | SURNADAL |