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| GLASS SERVICE A Audestad | 968329162 | HITRA |
| GL BYGG AS | 997335600 | HAMAR |
| GL-BYGG AS | 916350279 | OVERHALLA |
| GLENN A. MARTINSEN GRAVESERVICE | 969947994 | AREMARK |
| GLENN ARVE FIDJE | 989983962 | LYNGDAL |
| GLENNE BYGG AS | 952439243 | HOLMESTRAND |
| GLENN NIKOLAYSEN AS | 992804513 | ENEBAKK |
| GLENN SYVERTSEN AS | 920509185 | GRAN |
| GL MULTISERVICE AS | 920375715 | KVINNHERAD |
| GLOMMA ELEKTRO AS | 995725843 | LILLESTRØM |
| GLØMMEN ENTREPRENØR AS | 926585991 | NAMSOS |
| GL PROSJEKTSERVICE AS | 979729332 | KARMØY |
| GLV ENTREPRENØR AS | 915669999 | SIGDAL |
| G MAST AS | 918539913 | ØRLAND |
| G M BYGG AS | 990027099 | DRAMMEN |
| GMC HVAC AS | 921956592 | STAVANGER |
| GM ENTREPRENØR HARSTAD AS | 997874471 | HARSTAD |
| GM GRAVESERVICE AS | 993776327 | MIDTRE GAULDAL |
| G MOEN MASKIN & TRANSPORT AS | 961866111 | HØYLANDET |
| GN BYGG AS | 916611145 | VESTVÅGØY |
| G.NI ARKITEKTUR AS | 913235800 | OSLO |
| GNIST ARKITEKTER AS | 913128788 | BODØ |
| GNISTEN INSTALLASJON AS | 971230126 | OSLO |
| GN STUDIO AS | 919444525 | ÅS |
| GOBO DRIFT AS | 992247436 | ØYGARDEN |
| GODEJORD ENTREPRENØR AS | 998616921 | LILLESTRØM |
| GODE UTEROM AV ANNE-KARI HETTERUD | 929511387 | FÆRDER |
| GOD KARRANJ AS | 918745572 | GJEMNES |
| GODØY BYGG AS | 976266366 | GISKE |
| GODØY MUR & ENTREPRENØR AS | 922236003 | BERGEN |
| GOHEIM TAKST OG BYGGCONSULT AS | 998559391 | SØMNA |
| GOLBERG AS | 965700196 | GOL |
| GOLF SIGBJØRN | 969936283 | SOKNDAL |
| GOL GRAVE- OG BARKSERVICE AS | 929503295 | GOL |
| GOL KJØL OG FRYS AS | 989896423 | GOL |
| GOLTEN RØR OG MEKANISK VERKSTED | 970384049 | ØYGARDEN |
| GOLUFT AS | 928337359 | TRONDHEIM |
| GOMA-BYGG AS | 918125477 | KRISTIANSUND |
| GO SPRINKLER AS | 998235677 | HAMAR |
| GOTS AS | 985557969 | NITTEDAL |
| GOWENS AS | 922698651 | BÆRUM |
| GP-INVEST AS | 914751624 | SORTLAND |
| GRÆSDAL GLASS AS | 974989824 | ÅLESUND |
| GRAM HYTTER LAFT OG HÅNDVERKSTJENESTER AS | 928472787 | NES |
| GRANÅS MASKIN AS | 990083398 | NANNESTAD |
| GRAN BYGG & ELEKTRO AS | 898562972 | GRAN |
| GRAN CONSULT AS | 971597062 | EIDSVOLL |
| GRANDAHL BYGG AS | 911672979 | SARPSBORG |
| GRANDAHL RØR AS | 931940236 | HALDEN |