 | JELØY VVS AS | 917631735 | MOSS |
| JELSNES FLIS OG BAD AS | 918416714 | INDRE ØSTFOLD |
| JEMO ENTREPRENØR AS | 920246354 | SKIEN |
| JE NORDNES TRANSPORT AS | 925579521 | TRYSIL |
| JENS ARNE DELERUD | 899154592 | AURSKOG-HØLAND |
| JENSEN BLIKK OG VENTILASJON AS | 974212536 | LIER |
| JENSEN BYGG TEAM AS | 966572434 | RINGERIKE |
| JENSEN ELEKTRISKE AS | 950233486 | TROMSØ |
| JENSEN METALLINDUSTRI AS | 986333606 | BERGEN |
| JENSEN RØRSERVICE AS | 922099081 | JEVNAKER |
| JENSEN & SKODVIN ARKITEKTER AS | 927333244 | OSLO |
| JENSENS RØRLEGGERSERVICE AS | 914460859 | NORDRE FOLLO |
| JENSEN VVS AS | 993443808 | LØRENSKOG |
| JENS GERLACH SØRENSEN AS | 943650756 | TIME |
| JENSHUS MASKIN AS | 931758276 | RINGSAKER |
| JENS JOHAN OLSTAD | 969215136 | GJERDRUM |
| JENS PETTER ZETLITZ AS | 987662867 | TØNSBERG |
| JENSSEN ENTREPRENØR AS | 991521453 | NARVIK |
| JENS TANGEN BYGG OG VEDLIKEHOLD AS | 921669100 | ALSTAHAUG |
| JENS TREIDER SIVILARKITEKT MNAL | 970145214 | OSLO |
| JERNBETONG AS | 980835855 | MELHUS |
| JERSTAD VVS AS | 929395492 | KRISTIANSAND |
| JESS-BYGG AS | 912048039 | TYNSET |
| JESSEN RØR AS | 927345315 | HAMARØY |
| JESSHEIM VVS & VARMESERVICE AS | 922412839 | ULLENSAKER |
| JEVNE BYGG AS | 918119515 | VANG |
| J FINSTAD & Ø TEIG ANS | 980809331 | INDRE ØSTFOLD |
| J.H. BYGG OG EIENDOM AS | 932910594 | MOSS |
| JHS CONSTRUCTION AS | 990768617 | LARVIK |
| JIBO CONSULT JOHN INGVALD ØKLAND | 994820419 | BERGEN |
| 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 ENTREPRENØR AS | 925752401 | OSLO |
| J & K JOHNSEN AS | 980482332 | GAUSDAL |
| J & K MASKIN AS | 995685051 | KONGSBERG |
| 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 |