 | NANNESTAD BYGDESERVICE SA | 974470535 | NANNESTAD |
| NANNESTAD GRØNTMILJØ AS | 915892272 | NANNESTAD |
| NARO RØR OG FLIS AS | 831703512 | SARPSBORG |
| NARVIK BYGG AS | 919807784 | NARVIK |
| NARVIK EL AS | 920408133 | NARVIK |
| NATHANIEL HANSEN AS | 918887938 | ÅMLI |
| NATLAND GRAVESERVICE AS | 918063005 | HJELMELAND |
| NATURBASERT AS | 925610356 | HAMAR |
| NATURBYGG ENTREPRENØR AS | 976714237 | GJERDRUM |
| NATURMUR AS | 989877372 | GRIMSTAD |
| NATURSTEINSMURING AS | 925880175 | TIME |
| NAUSTDAL BLIKK AS | 930928984 | SUNNFJORD |
| NAVAREN ANALYSE AS | 951846856 | VADSØ |
| NB BOLIGER AS | 924823100 | ÅLESUND |
| N. B. BYGGTEAM AS | 990780501 | STAVANGER |
| NBN FLORØ AS | 923160388 | KINN |
| NBN NAUSTDAL AS | 916522800 | SUNNFJORD |
| NBT ANLEGG AS | 961865972 | SANDEFJORD |
| NBT BYGG AS | 927315963 | BODØ |
| NC BYGG AS | 911572095 | ALTA |
| NCC INDUSTRY AS | 984884176 | OSLO |
| NCC NORGE AS | 911274426 | OSLO |
| NCO AS | 836430972 | OSLO |
| NCON AS | 933187322 | ALTA |
| ND BYGG AS | 924792043 | OSLO |
| NEA ENTREPRENØR AS | 926623818 | SELBU |
| NEAS ELEKTRO AS | 956889057 | KRISTIANSUND |
| NEBBENES BYGG AS | 998859042 | LILLESTRØM |
| NEC AS | 898438422 | BERGEN |
| NEDIG AS | 979394179 | ARENDAL |
| NEDREBØ MASKIN & TRANSPORT AS | 816823692 | BOKN |
| NEDRE ROMERIKE BYGG AS | 997517288 | LILLESTRØM |
| NEDREVÅG AS | 997170822 | ULLENSVANG |
| NE EIENDOM AS | 915414052 | FARSUND |
| NEI TAKST AS | 923353933 | ØVRE EIKER |
| NEMKO NORLAB AS | 953018144 | RANA |
| NERDAL ENTREPRENØR AS | 918553428 | GULEN |
| NERHEIM & SØNNER MASKIN OG TRANSPORT AS | 926782061 | TYSVÆR |
| NERI HELGE FLOTHYL | 870343302 | VINJE |
| NERLAND MASKIN AS | 942144326 | HUSTADVIKA |
| NERLAND MUR AS | 912075583 | MOLDE |
| NERNES SNEKKERI & BYGG | 925586935 | BJØRNAFJORDEN |
| NERUM LARS HÅKON | 969088843 | SIGDAL |
| NESBAKK RØR AS | 934943848 | STAD |
| NESBERGET AS | 926641743 | BÆRUM |
| NESBØ MASKIN OG TRANSPORT AS | 915347649 | AURLAND |
| NESBYEN PUKK & BETONG AS | 950392924 | NESBYEN |
| NESE BYGG AS | 836539982 | KLEPP |
| 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 |
| NESSØ GLASS OG HÅNDTVERK-SERVICE AS | 984364687 | LEVANGER |
| 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 |
| 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 | LILLESTRØM |
| NEXUM CONSTRUCTION AS | 924368640 | 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 |
| NIKOLAISEN MASKIN AS | 934380312 | HOLE |
| 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 |