 | 100 % PAULSEN AS | 997947967 | KARLSØY |
| 1-2-TRE ELEMENTPRODUKSJON AS | 980292738 | TØNSBERG |
| 24/7 RØRLEGGERVAKTEN AVD ØSTFOLD AS | 931077309 | OSLO |
| 24/7 RØRLEGGERVAKTEN AVD. STAVANGER AS | 927497484 | STAVANGER |
| 24 BYGG AS | 922737193 | BERGEN |
| 2 BYGG AS | 932761084 | MODUM |
| 2KVIK BYGG AS | 917546355 | TØNSBERG |
| 2TAL AS | 955497643 | ALTA |
| 2TAL ELEKTRO AS | 985233632 | LÆRDAL |
| 2TAL UTEMILJØ ANLEGGSGARTNER AS | 919871466 | NARVIK |
| 3B FLISLEGGER AS | 992784490 | LILLESTRØM |
| 3 BYGG GAUSDAL AS | 995277387 | GAUSDAL |
| 3D ARKITEKTER AS | 981490274 | MIDT-TELEMARK |
| 3D BYGG AS | 998894840 | KARMØY |
| 3PROSJEKT AS | 898310132 | SKIEN |
| 3R LANDMÅLING AS | 827128392 | GRANE |
| 3RW ARKITEKTER AS | 977385369 | BERGEN |
| 3S BYGG AS | 923273891 | OSLO |
| 3 T BYGG AS | 918632514 | MODUM |
| 4B ARKITEKTER AS | 921934092 | OSLO |
| 4CONSULT AS | 912801349 | KLEPP |
| 4TAK AS | 928921727 | TØNSBERG |
| 70 GRADER N ARKITEKTUR AS | 974281325 | TROMSØ |
| 7FJELL ENTREPRENØR AS | 912102262 | BERGEN |
| 7 FJELL VÅTROM & FASADE AS | 936551971 | BERGEN |
| 7FKONSULT AS | 932031353 | NITTEDAL |
| 90 GRADER AS | 928470679 | OSLO |
| A1 ARKITEKTER AS | 925895652 | SUNNFJORD |
| A2 BYGG AS | 917634874 | NARVIK |
| A2Z GRAVING OG BYGG AS | 923930310 | OSLO |
| A38 ARKITEKTER AS | 915891284 | BÆRUM |
| A3PRO AS | 918989331 | MOLDE |
| A4 EIENDOM AS | 933613259 | STAVANGER |
| AAB AS | 959748535 | ÅS |
| AABERG EIENDOMSDRIFT AS | 994066072 | OSLO |
| AABOEN AS | 974394480 | SKJÅK |
| AABY BYGG & LAFT ENTREPRENØR AS | 930932043 | FLÅ |
| AAHEIM MASKINER & TRANSPORT AS | 980453030 | LESJA |
| A&A HOLDING AS | 989236008 | RAKKESTAD |
| AAKRE AS | 913846192 | STAVANGER |
| AALAND AS | 988950548 | ÅMLI |
| AALMO AS AUTORISERT ELEKTROENTREPRENØR | 960121163 | TRONDHEIM |
| AAMODT BYGG AS | 914852439 | KRISTIANSAND |
| AAMODT ENTREPRENØR AS | 829094622 | SYKKYLVEN |
| AAMODTS BLIKK OG VENTILASJON AS | 991872345 | KRISTIANSAND |
| AAMODT VVS AS | 980679551 | KRISTIANSAND |
| AANAAS BYGG OG TAKST | 995113198 | MIDT-TELEMARK |
| AANDAL & HAUGLAND BYGG AS | 915275974 | MOSS |
| AANENSEN BYGG AS | 927473674 | RISØR |
| AANERUD ENTREPRENØR AS | 966168838 | OSLO |
| A-ARK AS | 921897782 | OSLO |
| Å ARKITEKTER AS | 932393573 | ÅLESUND |
| AARLAND BYGG & EIENDOMSUTVIKLING AS | 987345640 | AUSTEVOLL |
| AARSETH BOLIGVENTILASJON AS | 989986031 | LILLESTRØM |
| AARSLEFF FUNDAMENTERING & BORING AS | 990405700 | NOME |
| AARSLEFF RAIL AS | 925751189 | TRONDHEIM |
| AARSRUD BYGG AS | 931151053 | OSLO |
| AARSTAD ANLEGG AS | 929343875 | INDERØY |
| AART ARCHITECTS NO AS | 879423392 | OSLO |
| AARTUN MASKIN | 987394145 | STAVANGER |
| AARTUN TRANSPORT AS | 916916094 | SAUDA |
| AARVIK BYGGMESTER AS | 937965850 | BJØRNAFJORDEN |
| AARVIK TAKST AS | 922308527 | BJØRNAFJORDEN |
| AASBERG GEODATA | 926891561 | AURSKOG-HØLAND |
| AASEBØ BETONGENTREPRENØR AS | 928148408 | ASKØY |
| AASEBØ MURSERVICE AS | 912218856 | ASKØY |
| AASEBØ SAG AS | 987701455 | ASKØY |
| AASEMYR ANLEGGSSERVICE AS | 930791776 | VOLDA |
| AASEN BYGG | 996219836 | TØNSBERG |
| AASEN BYGGELEDELSE AS | 817373372 | DRAMMEN |
| AASEN MASKIN AS | 956814928 | TINGVOLL |
| AASEN MASKIN OG TRANSPORT AS | 988084557 | AURE |
| AASE PROSJEKT AS | 990238316 | OSLO |
| AASE RØR AS | 912722732 | SANDNES |
| AASGARD BYGG AS | 920317065 | SKAUN |
| AASHEIM RØRSERVICE AS | 978685528 | OSTERØY |
| AASLAND TEKNIKK AS | 989257420 | PORSGRUNN |
| AASLIE ANLEGG AS | 923106960 | SØR-AURDAL |
| AASLUND MASKIN AS | 933230678 | GJØVIK |
| AAS & NORDAL AS | 980383660 | NANNESTAD |
| AAS OG HØILAND AS | 940328527 | LYNGDAL |
| AASS MASKINSERVICE AS | 988504548 | FREDRIKSTAD |
| A-AULIE AS | 911577240 | ULLENSAKER |
| AAVITSLAND BYGG | 825598782 | SANDNES |
| ABACUS AS | 916665814 | STAVANGER |
| A & B ANDREASSEN MASKIN AS | 979334494 | VINDAFJORD |
| AB ARKITEKTER AS | 987328762 | FREDRIKSTAD |
| A B BYGG AS | 920329136 | HAUGESUND |
| A-B BYGG AS | 914074312 | BÆRUM |
| A.B BYGG AS | 932755793 | MALVIK |
| ABC BYGGKONTROLL AS | 998532841 | ENEBAKK |
| ABC ELEKTRO AS | 936403379 | HORTEN |
| ABC EL-MONTASJE AS | 892313792 | SORTLAND |
| ABC ENTREPRENØR AS | 997114159 | BÆRUM |
| ABC HÅNDVERKEREN FRANKIEWICZ AS | 998456053 | LILLESTRØM |
| ABCHUS AS | 914313902 | ÅS |
| ABC RØR AS | 948744805 | OSLO |
| ABC - TAK AS | 994021397 | KRISTIANSAND |
| ABD RØRSERVICE AS | 991482148 | INDRE FOSEN |
| ABEA AS | 923056580 | ØVRE EIKER |