 | JÆRHUS Livar Mauland | 969083981 | TIME |
| JÆRMESTER AS | 979541902 | HÅ |
| JÆRMUR AS | 989138502 | HÅ |
| JÆRPROSJEKT AS | 931710036 | SANDNES |
| JÆRTAKST AS | 997695798 | KLEPP |
| JÆR TRE AS | 917118167 | HÅ |
| JAHN BRÅTVEIT | 994285084 | LYNGDAL |
| JAHO MUR OG FASADE AS | 926038788 | KRISTIANSAND |
| JAHR TRANSPORT AS | 976500997 | NANNESTAD |
| JAKOB EIMHJELLEN | 977265312 | GLOPPEN |
| JAKOBSEN RØR AS | 913341686 | LINDESNES |
| JAKSA TØMRER & BAD AS | 927167956 | LILLESTRØM |
| J.A LARSEN RØRLEGGERSERVICE | 921889267 | VESTBY |
| J.A LARSEN RØRLEGGERSERVICE AS | 935954460 | VESTBY |
| JAMES BARBER ARKITEKT | 924786825 | BERGEN |
| JAMO ENTREPRENØR AS | 920053572 | NANNESTAD |
| JAMTVEIT ENTREPRENØR AS | 930186309 | NOTODDEN |
| JAN ANDERSEN & SØNN AS BYGG OG TØMRERMESTER | 961499429 | HALDEN |
| JAN ANDERS HANSEN | 881322862 | INDRE ØSTFOLD |
| JAN E LARSEN AS | 920974074 | FLEKKEFJORD |
| JAN ERICHSEN MASKIN AS | 916822332 | ØVRE EIKER |
| JAN ERIK BRENNE AS | 913099745 | BÆRUM |
| JAN ERIK HAGELUND AS | 989560913 | RINGSAKER |
| JAN ERIK JOHNSRUD AS | 988037648 | BÆRUM |
| JAN-ERIK LUNDTEPPEN GRAVEMASKINDRIFT DA | 993550698 | ELVERUM |
| JAN-ERIK OLSEN KJØKKEN OG GLASS AS | 910824368 | PORSGRUNN |
| JAN ERIK OPSAL HAUG | 896234692 | BJØRNAFJORDEN |
| JAN HASLESTAD GRAVING & TRANSPORT AS | 977058422 | TØNSBERG |
| JAN HAUGEN AS | 880476262 | DOVRE |
| JAN HVAMBSAL AS | 939210709 | KONGSBERG |
| JAN I BYGG AS | 926826034 | EIDSVOLL |
| JAN INGE HØYDAL AS | 911879239 | SOGNDAL |
| JAN KÅRE EIDE | 987130083 | FJORD |
| JAN MAGNE DAHLE | 982354390 | MOLDE |
| JAN NOVAK | 970322442 | INDRE ØSTFOLD |
| JAN OG JO ELEKTRO AS | 982699185 | OSLO |
| JAN ØVSTEBØ | 986961798 | KVINNHERAD |
| JAN-ROGER BIRKELUND AS | 892320632 | TØNSBERG |
| JANS BYGGESERVICE & SØNN AS | 914724759 | MOSS |
| JANSEN ELEKTRO AS | 997374142 | ÅLESUND |
| JANSEN FRERIKSEN VVS TEKNIKK AS | 998151724 | DRANGEDAL |
| JANS HAGESERVICE AS | 950169354 | BERGEN |
| JAN TERJE BERLANDSTVEIT | 970390987 | BJØRNAFJORDEN |
| JAR ANLEGG AS | 992451440 | HOLMESTRAND |
| JARLE SÆTRA AS | 981440528 | KONGSBERG |
| JARL INGE HAUKÅS | 970063072 | HUSTADVIKA |
| JARLSBERG BYGG AS | 923708707 | TØNSBERG |
| JARO AS | 976241053 | ALTA |
| J.A.RØRSERVICE AS | 912258408 | NORDRE FOLLO |
| JAROTECH AS | 989161083 | ASKER |
| JAR RØRTEKNIKK AS | 914750970 | BÆRUM |
| JAR-TEK RØR AS | 941173675 | BÆRUM |
| JASS BYGG AS | 925111147 | LILLESTRØM |
| JÅSUND BYGG | 955196848 | SOLA |
| JATBYGG AS | 920709206 | KRISTIANSAND |
| JATEC AS | 960853687 | HAUGESUND |
| JATEK BYGG AS | 934194985 | OSLO |
| JATRE AS | 945735406 | HUSTADVIKA |
| JA VVS AS | 926626698 | LILLESTRØM |
| J BARLIEN TRANSPORT AS | 920634060 | OVERHALLA |
| JB BYGG AS | 989769707 | SØR-VARANGER |
| JB BYGG OG BETONG AS | 931075810 | NORD-FRON |
| J BIRKELAND BYGG | 936588875 | LYNGDAL |
| J. B KRISTIANSEN AS | 929086740 | NES |
| JBL BYGG AS | 912257053 | KVÆNANGEN |
| JBM AS | 826529032 | NANNESTAD |
| JBS INNEKLIMA AS | 921425945 | STAVANGER |
| JBYGG AS | 922632030 | DRAMMEN |
| JCDECAUX NORGE AS | 976555988 | OSLO |
| JCL BYGG AS | 911712504 | LIER |
| JD PROFF BYGG AS | 930766046 | LØRENSKOG |
| JD SERVICE AS | 921373864 | VEGA |
| JEISTAD ENTREPRENØR AS | 920044956 | LILLEHAMMER |
| 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 & SKODVIN ARKITEKTER AS | 927333244 | OSLO |
| JENSEN SNEKKER OG TØMRERSERVICE AS | 918297154 | TRONDHEIM |
| JENSENS RØRLEGGERSERVICE AS | 914460859 | NORDRE FOLLO |
| JENS GERLACH SØRENSEN AS | 935211476 | TIME |
| JENSHUS MASKIN AS | 931758276 | RINGSAKER |
| JENS JOHAN OLSTAD | 969215136 | GJERDRUM |
| JENS KRISTIAN RØSTAD | 897542552 | MOSS |
| JENS OG BJARTE AS | 916081634 | ØKSNES |
| JENS PETTER ZETLITZ AS | 987662867 | TØNSBERG |
| JENSSEN ENTREPRENØR AS | 991521453 | LAVANGEN |
| JENS TANGEN BYGG OG VEDLIKEHOLD AS | 921669100 | ALSTAHAUG |
| JENS TREIDER SIVILARKITEKT MNAL | 970145214 | OSLO |
| JERNBRO INDUSTRIAL SERVICES AS | 997578597 | ALVER |
| JERSTAD VVS AS | 929395492 | KRISTIANSAND |
| JESS-BYGG AS | 912048039 | TYNSET |
| JESSEN ENTREPRENØR AS | 988336947 | HAMARØY |
| JESSHEIM RØRLEGGERBEDRIFT AS | 928520919 | ULLENSAKER |
| JEVNE BYGG AS | 918119515 | VANG |