 | GREÅKER GRAVING OG TRANSPORT AS | 992621605 | SARPSBORG |
| GREEN ROCK AS | 996760170 | BERGEN |
| GREFSEN VEDLIKEHOLD AS | 950902957 | ULLENSAKER |
| GREFSTAD VVS | 989331280 | NITTEDAL |
| GREGPOL AS | 913299019 | OSLO |
| GRENLAND GRAVESERVICE AS | 980452263 | SKIEN |
| GRENOR BYGG AS | 915331882 | NITTEDAL |
| GRENRØR AS | 991589562 | SKIEN |
| GREVSTAD & TVEDT VVS AS | 920215742 | BERGEN |
| GRIDSETH RØR AS | 967318493 | SUNNDAL |
| GRIEG ARKITEKTER AS | 980649822 | BERGEN |
| GRIFF ARKITEKTUR AS | 987529490 | FREDRIKSTAD |
| GRIFF ENTREPRENØR AS | 923172548 | TRONDHEIM |
| GRIMNES & ANTONSEN FJELLSPRENGNING AS | 916212267 | KONGSBERG |
| GRINDAHEIM BYGG & RESTAURERING Bøye Kvale | 971236612 | VANG |
| GRINDAKER AS | 944389407 | OSLO |
| GRINDE AS SIVILARKITEKTER MNAL | 947487817 | OSLO |
| GRINDVIK BYGG AS | 917695822 | ÅLESUND |
| GRIPSGÅRD BYGG AS | 992299118 | ALVER |
| GRIT CONSULT AS | 930374075 | PORSGRUNN |
| GRØNÅS BYGG | 929612671 | HAUGESUND |
| GRONG ELEKTRO AS | 979605625 | GRONG |
| GRONG GRAVESERVICE AS | 928455556 | GRONG |
| GRØNN BYGGUTVIKLING AS | 912670694 | DRAMMEN |
| GRØNNE FORMER AS | 929644271 | LIER |
| GRØNNE MUR & FLIS AS | 919767642 | ASKER |
| GRØNNERØD LARS MAGNE | 970263462 | LARVIK |
| GRØNN KJØLING AS | 923602380 | NORD-AURDAL |
| GRØNN VVS AS | 930709891 | BÆRUM |
| GRØNSBERG BYGG AS | 990770557 | KINN |
| GRØNSTVET OG HUSEBY AS | 913118391 | NORDRE FOLLO |
| GRØNT ANLEGG AS | 830163212 | TRONDHEIM |
| GRØNT BYGG AS | 923594132 | SKIEN |
| GRØNVIKA INVEST AS | 991731652 | HARAM |
| GRØNVOLD BYGG AS | 998641896 | HURDAL |
| GRORUD RØRLEGGER-SERVICE AS | 917768250 | OSLO |
| GRØSETH EIENDOM AS | 926170074 | TRONDHEIM |
| GROTA BYGG AS | 998403995 | BÆRUM |
| GRØTEIG AS | 916508816 | HORTEN |
| GRØTERUD BULLDOZERLAG ANLEGG AS | 970931813 | SIGDAL |
| GRØTERUDS BYGGSERVICE AS | 925549959 | MODUM |
| GROVEN OG KARLSEN AS | 988386421 | MIDT-TELEMARK |
| GROVFJORD BYGG AS | 896814192 | TJELDSUND |
| GROV FORSKALING AS | 918886257 | STORD |
| GRUBEN BLIKK AS | 961065429 | RANA |
| GRUDE BYGG AS | 979698968 | KLEPP |
| GRUNG ARKITEKTUR AS | 891407262 | BERGEN |
| GRUNNARBEID VEST AS | 831905492 | OSTERØY |
| GRUNN & BETONG AS | 916058942 | BJØRNAFJORDEN |
| GRUNNBYGG AS | 981920074 | SARPSBORG |