 | NESBAKK RØR AS | 934943848 | STAD |
| NESBERGET AS | 926641743 | BÆRUM |
| NESBØ MASKIN OG TRANSPORT AS | 915347649 | AURLAND |
| NESBYEN PUKK & BETONG AS | 950392924 | NESBYEN |
| NES BYGG OG PROSJEKTERING AS | 927609150 | VESTBY |
| NES HUS & HYTTEBYGG AS | 990375496 | NESBYEN |
| NESLIN BYGG AS | 912155137 | MERÅKER |
| NES MASKINSERVICE AS | 916848110 | NES |
| NESNA MASKINSTASJON AS | 981888936 | NESNA |
| NES OPPMÅLING AS | 934040295 | VINDAFJORD |
| NES RØR AS | 876725622 | RINGSAKER |
| NES RØRLEGGERBEDRIFT AS | 921398433 | NES |
| NES RØRSERVICE AS | 968321811 | NES |
| NESS BYGG AS | 920803512 | SOGNDAL |
| NESSET BYGG AS | 956833876 | MOLDE |
| NESS INDUSTRI AS | 922707596 | TROMSØ |
| NES TAKST OG EIENDOM AS | 924590920 | NES |
| NEST AS | 921136765 | OSLO |
| NEST DESIGN AS | 927605236 | STORD |
| NESTTUN VVS & BYGG AS | 922157987 | BERGEN |
| NESVIK AS | 998799244 | HÅ |
| NETCO AS | 974478285 | HAMAR |
| NETGLASS TOTALFASADE AS | 915286399 | TROMSØ |
| NETLANDSNES ANLEGG AS | 996737802 | KVINESDAL |
| NEWSEC PROPERTY ASSET MANAGEMENT AS | 959718482 | TRONDHEIM |
| NEW SHOP AS | 996894630 | ÅS |
| NEXA CONSTRUCTION AS | 837023912 | KARASJOK |
| NEX ENTREPRENØR AS | 934553489 | KRISTIANSAND |
| NEXRØR AS | 933170543 | OSLO |
| NFO ELEKTRO AS | 828959352 | STAVANGER |
| NG BYGG AS | 998182409 | ØRLAND |
| NGF RØRSERVICE AS | 930094013 | OSLO |
| NGS MASKIN AS | 998516854 | SVEIO |
| NH MASKIN AS | 976594967 | ASKØY |
| NH MELHUSBYGG AS | 891111932 | MELHUS |
| NIC JACOBSEN ENTREPRENØR AS | 959524297 | ASKØY |
| NICO BLIKK & TAK AS | 913146212 | KRISTIANSAND |
| NICOLAYSEN ANLEGG OG TRANSPORT AS | 964694583 | RÅDE |
| NICOLE TORGERSEN RÅDGIVNING AS | 933580598 | MODUM |
| NIDAROS BYGGKOMPETANSE AS | 918629025 | TRONDHEIM |
| NIDAROS GLASS OG MONTASJE AS | 825194282 | TRONDHEIM |
| NIDAROS MURSYSTEM AS | 916320191 | SKAUN |
| NIDAROS OPPMÅLING AS | 984430299 | TRONDHEIM |
| NIDARVOLL BYGGSERVICE AS | 992893079 | TRONDHEIM |
| NIDELVEN BYGG AS | 913732979 | TRONDHEIM |
| NIDER AS | 930761737 | FREDRIKSTAD |
| NIELSEN CONSULT AS | 935269253 | NORDREISA |
| NIELS TORP+ ARKITEKTER AS | 922748705 | OSLO |
| NIKLAS ERIKSEN AS | 826676892 | AURSKOG-HØLAND |
| Nils Aksnes & Co AS | 931669559 | KVAM |
| NILS BROEN | 977098254 | ELVERUM |
| NILS BURUM | 976052153 | ÅS |
| NILSENBYGG EIENDOM AS | 991780939 | BAMBLE |
| NILSEN & CO AS | 921260296 | GRIMSTAD |
| NILSEN ELEKTRO AS | 956338948 | HORTEN |
| NILSEN FLIS OG HÅNDVERKSERVICE AS | 920438504 | BODØ |
| NILSEN HARRY A | 970337954 | RANA |
| NILSEN MASKIN AS | 874433292 | VEGÅRSHEI |
| NILSEN & STURE BETONG AS | 986481729 | ASKØY |
| NILSEN VENTILASJON AS | 995234548 | ARENDAL |
| NILSEN VVS AS | 913509811 | ASKØY |
| NILS INGE TJELTA AS | 863233062 | SOLA |
| NILS JR FREY | 970326170 | KRISTIANSUND |
| NILS KALDAHL ANLEGG & TRANSPORT AS | 886833172 | NAMSOS |
| NILS LØFF AS | 983976956 | KONGSBERG |
| NILS OMA MASKIN AS | 920734170 | TIME |
| NILS REIME MASKIN AS | 987709111 | HÅ |
| NILSSON AS | 983494226 | BODØ |
| NILSSON HARAS AS | 919546646 | SORTLAND |
| NILSSON MO AS | 986444327 | RANA |
| NILS TORE AAMODT | 970156097 | HAMAR |
| NIMBUS FIBER AS | 895204862 | OSLO |
| NINO RØRLEGGER AS | 923843175 | OSLO |
| NIPEDAL TAK OG MEMBRAN AS | 932481588 | VENNESLA |
| NITTEDAL RØRLEGGERBEDRIFT AS | 916998767 | LILLESTRØM |
| NIVAA AS | 835781372 | OSLO |
| NIVÅBYGG AS | 919290757 | LILLESTRØM |
| NJS BYGGSERVICE AS | 916538235 | RINGERIKE |
| NK ENTREPRENØR AS | 821095352 | OSLO |
| NL ARKITEKTUR AS | 931120174 | RINGERIKE |
| NLI ELEKTROSYSTEMER AS | 989042335 | TØNSBERG |
| NLI ENGINEERING AS | 887994722 | TØNSBERG |
| NMC RØRSERVICE AS | 933639711 | OSLO |
| NM RØR AS | 996798011 | OSLO |
| NMS EIENDOM BERGEN AS | 922179611 | BERGEN |
| NOAH EIENDOMSTJENESTER AS | 933642852 | OSLO |
| NO ARKITEKTER AS | 935632625 | OSLO |
| NOA VVS AS | 915448941 | STORD |
| NOBEL RØR INSTALLASJON AS | 992139633 | VÅGAN |
| NOBERG ENTREPRENØR AS | 935338077 | ULLENSAKER |
| NOBI BYGG OG BETONG AS | 931491865 | VOSS |
| NO BYGG AS | 814968502 | SKIEN |
| NODDELAND BYGG | 984607245 | FROLAND |
| NODE RÅDGIVENDE INGENIØRER AS | 919853557 | BERGEN |
| NO DIG VESTFOLD AS | 921359721 | LARVIK |
| NOG ENTREPRENØR AS | 930512524 | VOLDA |
| NOIR RØRLEGGERSERVICE AS | 915925421 | OSLO |
| NØKKEL-FERDIG DRIFT AS | 933592499 | HOLMESTRAND |
| NØKLAND BYGGSERVICE | 933617882 | LINDESNES |
| NØKLAND RØRLEGGERSERVICE AS | 915514758 | LYNGDAL |