 | 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 EGELAND MASKIN AS | 979795424 | SANDNES |
| JOSTEIN MYGE AS | 979505043 | TYSVÆR |
| JOSTEIN RØNSEN ARKITEKTER AS | 975795942 | OSLO |
| JOSTEIN SKJETNE AS | 918029141 | KRISTIANSUND |
| JOSTEIN VEDØY | 996478947 | STAVANGER |
| JOSVANGER ELEKTRO AS | 971002700 | LUSTER |
| JOTNE ANKERS AS | 980558630 | HALDEN |
| JOTUNHEIMEN BYGG AS | 922943893 | LOM |
| JOWA MASKIN AS | 989434632 | NORDREISA |
| JO W TOFTDAHL | 953855313 | GRAN |
| JP ENTREPRENØR AS | 925321494 | HORTEN |
| JR ANLEGG AS | 934763505 | OSLO |
| J&R BYGG AS | 921682808 | SELBU |
| JR BYGG AS | 930600954 | KRISTIANSAND |
| JR RØRSERVICE AS | 917321884 | NORDRE FOLLO |
| J S BYGG V/JAN STRØMMEGJERDE | 970452885 | SYKKYLVEN |
| JSG RØR AS | 923171401 | OSLO |
| JSI INSTALLASJON AS | 993129038 | SØR-VARANGER |
| JS MASKIN JAN SVELA AS | 829797402 | TIME |
| JSM RØRSERVICE AS | 983583830 | BERGEN |
| JSN TAKST OG VVS AS | 926432648 | EIDSVOLL |
| J S SERVICE JAN SVELA AS | 981454723 | TIME |
| JSTARKITEKTER AS | 991181369 | TRONDHEIM |
| J TANGERÅS MURERSERVICE AS | 989114778 | OSTERØY |
| J T BRATTLI BYGGSERVICE AS | 984113102 | RANA |
| J&T BYGG AS | 924467320 | TROMSØ |
| JT BYGG JAHN-TERJE NILSEN | 913025067 | BERGEN |
| JTK RØRSERVICE AS | 914950910 | TØNSBERG |
| JTM BYGG AS | 930641383 | NAMSOS |
| J. TUFTELAND AS | 941931790 | STORD |
| JULE INDUSTRIER AS | 918473076 | INDERØY |
| JULE MASKIN & SKOGSDRIFT AS | 983158749 | SKAUN |
| JULIAN KOBUS ARKITEKTKONTOR | 914330165 | BERGEN |
| JUULS RØRSERVICE AS AUT RØRLEGGERFIRMA | 943919607 | OSLO |
| JV ANLEGG AS | 912123049 | SARPSBORG |
| J&V SNEKKERE AS | 915244882 | OSLO |
| K10 BYGG KENNETH LAVIK | 911779854 | BERGEN |
| K2 ELEKTRO AS | 912110117 | OSLO |
| K3 MONTASJE AS | 919579226 | OSLO |
| KAARBY TORGER | 970150900 | TØNSBERG |
| KAARE MORTENSEN AS | 956813301 | LARVIK |