 | 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 |
| GRUNG AS | 933182649 | OSLO |
| GRUNNARBEID ENTREPRENØR AS | 926819240 | TRONDHEIM |
| GRUNNARBEID VEST AS | 831905492 | OSTERØY |
| GRUNN & BETONG AS | 916058942 | BJØRNAFJORDEN |
| GRUNNBYGG AS | 981920074 | SARPSBORG |
| GRUNNFJELL AS | 929091558 | ASKVOLL |
| GRUNNLINK AS | 827469262 | FARSUND |
| GRUNNMUR AS | 990097305 | OSLO |
| GRUNNMURSPESIALISTEN AS | 989877801 | HAMAR |
| GRUNNPARTNER AS | 913868188 | OVERHALLA |
| GRUNN-SERVICE AS | 936131425 | TIME |
| GRUNN SOLID AS | 927151448 | KRISTIANSAND |
| GRUNNTEKNIKK AS | 925362441 | SANDEFJORD |
| GRUNNTEKNIKK MILJØ AS | 918283625 | NITTEDAL |
| GRYTHE MASKIN AS | 821127572 | HOLMESTRAND |
| GS ARKITEKTER AS | 916173075 | BÆRUM |
| G. S. BYGG AS | 990336857 | DRAMMEN |
| GS BYGG OG ANLEGG AS | 917636850 | HOLMESTRAND |
| GS BYGGTECH AS | 916642741 | MIDT-TELEMARK |
| GS-DRIFT AS | 933466728 | HJELMELAND |
| GS MASKIN AS | 918912320 | DRANGEDAL |
| GS-MASKIN AS | 990555125 | KINN |
| GS STÅLBYGG AS | 929359658 | PORSGRUNN |
| GST BYGGMONTERING AS | 823672462 | ASKER |
| G-TAKK AS | 826091312 | FARSUND |
| GT-BYGG AS | 995079917 | NOTODDEN |
| GTI KARMØY AS | 913716361 | KARMØY |
| GT MUR & FLIS AS | 914154677 | FREDRIKSTAD |
| GTS AS | 991238034 | HOL |
| GUDMUNDSVEEN AS | 998303036 | VESTRE TOTEN |
| GUERICKE ENGINEERING AS | 917411492 | FÆRDER |
| GULBRANDSEN BYGG | 999639623 | FREDRIKSTAD |
| GULBRANDSEN & OLIMB AS | 879296242 | OSLO |
| GULCON AS | 922128693 | ASKER |
| GULEN BLIKK OG VEDLIKEHOLD AS | 922347883 | GULEN |
| GULLHAGEN ANLEGGSDRIFT AS | 988415472 | ÅL |
| GULLICHSEN AS | 925884359 | ENEBAKK |
| GULLI MASKIN AS | 927547244 | LØRENSKOG |
| GULO INVESTERING AS | 992740736 | STEINKJER |