 | 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 |
| GULVBETONG AS | 992699612 | TRONDHEIM |
| GULVENTREPRENØREN AS | 992103930 | LILLESTRØM |
| GULV OG MAL AS | 985185042 | HEIM |
| GULV OG TAK AS | 936130364 | SANDNES |
| GUNDERSEN MASKIN | 971044519 | TROMSØ |
| GUNDERSEN MASKIN & TRANSPORT AS | 980882500 | TROMSØ |
| GUNDERSEN SVEN | 870371772 | BERGEN |
| GUNGE VVS AS | 918777520 | TROMSØ |
| GUNNAR BAKKEN | 919451890 | LARVIK |
| GUNNAR BROVIG | 959404062 | LILLESAND |
| GUNNAR DAHLE | 970295070 | TOKKE |
| GUNNAR FOSSLI | 913302060 | SANDEFJORD |
| GUNNAR HOGNERUD AS | 982894638 | HOL |
| GUNNAR JAKOBSEN AS | 998366380 | LINDESNES |
| GUNNAR KIND AS | 983762433 | OSLO |
| GUNNAR L HANSEN OG SØNN DA | 952947885 | OSLO |
| GUNNAR RESE AS | 987884959 | ASKER |
| GUNNERUD ENTREPRENØR AS | 924957670 | SIGDAL |
| GUNNLEIF FJOGSTAD MASKIN AS | 913854934 | KLEPP |
| GUNVALD JOHANSEN BYGG AS | 987597887 | BODØ |
| GUNVALDSEN & SØNN AS | 911639130 | NORDRE FOLLO |
| GUPEX AS | 943705879 | OSLO |
| GUSTAD AS | 995223074 | AVERØY |
| GUSTAV EIENDOM DRIFT AS | 912099849 | OSLO |
| GUSTAV OLSEN ENTREPRENØRFORRETNING AS | 927958910 | OSLO |
| GUSTAVSEN RØR AS | 923842829 | LARVIK |
| GUSTAVSEN & SLEMDAL AS | 968320106 | ULLENSAKER |
| GUSTERUD BYGG AS | 996487857 | EIDSVOLL |
| GUTTA I SLAGET ENTREPRENØR AS | 931752170 | OSLO |
| H2 BYGG AS | 995834707 | AVERØY |
| H2 BYGGETEKNIKK AS | 989579592 | BERGEN |
| H2 HARDANGER AS | 925233323 | KVAM |
| H2 RØR AS | 912749460 | RANDABERG |
| HA 1 BOLIG AS | 932165074 | SØR-VARANGER |
| HAAGENSEN AS | 825720952 | ÅLESUND |
| HAAKON KVESTAD AS | 982450128 | ULLENSVANG |
| HAALAND KLIMA AS | 986897526 | OSLO |
| HAALAND MO AS | 971000244 | RANA |
| HAALAND MOSJØEN AS | 925259349 | VEFSN |
| HAALAND NORD AS | 916701993 | BODØ |
| HAANDVERKERNE AS | 979440499 | ASKER |
| HAARSTAD ERIK SIVILARKITEKT MNAL | 970277005 | OSLO |
| HAATRE AS | 923931015 | SULA |