 | JI BYGG AS | 971066571 | VESTBY |
| JIM HÅRE BYGGTJENESTER AS | 943512000 | SIGDAL |
| JIN MASKIN AS | 890128572 | BREMANGER |
| JJ BT AS | 928601242 | TØNSBERG |
| J JOHNSEN & SØNNER AS | 913206339 | STAVANGER |
| JK ANLEGG AS | 916723091 | GJØVIK |
| JK.ARKITEKTUR AS | 988287644 | STORD |
| JK BYGG AS | 911824779 | HARSTAD |
| JK BYGGTEKNIKK AS | 913459288 | VERDAL |
| JK ENTREPRENØR AS | 925752401 | OSLO |
| J K PEDERSEN BYGG OG VEDLIKEHOLD | 891133502 | STAD |
| JKR JAN KIHM RØRMONTASJE AS | 945401532 | OSLO |
| J. KVALVÅGNES AS | 992551631 | SVEIO |
| JL HYTTEBYGGEREN AS | 998376394 | NESBYEN |
| JLP TJENESTER AS | 929551494 | KLEPP |
| JM ANLEGG AS | 818445962 | HUSTADVIKA |
| JM ANLEGGSERVICE AS | 926880012 | SULA |
| JM FØRE AS | 928461904 | NARVIK |
| JM HANSEN AS | 995306433 | TROMSØ |
| JM JENSSEN MASKIN AS | 995198789 | SALANGEN |
| JMS MASKIN AS | 954466132 | TROMSØ |
| JMT BYGG OG ANLEGG AS | 916944225 | VESTVÅGØY |
| JN RØRSERVICE AS | 998727855 | ASKER |
| JOAKIM JOHANSEN AS | 943425787 | SANDEFJORD |
| JOAR HELGE FORSAA | 990196001 | HARSTAD |
| JOB ARKITEKTER AS | 964500002 | STAVANGER |
| JODA AS | 915800424 | VESTBY |
| JØDAHL ENTREPRENØR AS | 971201916 | LILLESTRØM |
| JØDAHL TAKST OG BYGG AS | 927027003 | ULLENSAKER |
| JOHAN BREKKA ENTREPRENØRFIRMA AS | 951067660 | KRAGERØ |
| JOHAN EEK-LARSEN AS | 925786470 | BERGEN |
| JOHANNESSEN AS | 922636761 | TRONDHEIM |
| JOHANNESSEN OG HAGEN AS | 976203453 | TRONDHEIM |
| JOHANSEN BAD OG RØRSERVICE AS | 990718245 | OSLO |
| JOHANSEN BYGG & EIENDOM AS | 923143629 | FROGN |
| JOHANSEN BYGG & REHABILITERING AS | 917886679 | TRONDHEIM |
| JOHANSEN MASKIN AS | 986016074 | HEMNES |
| JOHANSEN RØR AS | 926590588 | ETNE |
| JOHANSEN RØRLEGGERSERVICE AS | 997082680 | VESTVÅGØY |
| JOHANSEN RØR OG ANLEGG | 826793082 | STANGE |
| JOHANSEN VVS AS | 979212445 | OSLO |
| JOHANSSON BYGG SERVICE | 929508319 | BERGEN |
| JOHAN WESTLIE & SØNNER AS | 955663578 | MARKER |
| JOHN ANDREASSEN | 992957344 | HJARTDAL |
| JOHN DYRUD MASKIN | 977490863 | VESTRE TOTEN |
| JOHN FADUM AS | 911557622 | TØNSBERG |
| JOHN GALTEN AS | 983792324 | ÅMOT |
| JOHN GJERNES | 970554092 | RISØR |
| JOHN HAGEN AS | 915611133 | PORSGRUNN |
| JOHN HOLVIK AS | 978678882 | SUNNFJORD |