 | GABRIEL ELEKTRO AS | 970923136 | PORSANGER |
| GADA BYGGETEKNIKK AS | 929914147 | OSLO |
| GAGAMA ELEKTRO AS | 942143710 | HAMMERFEST |
| GAIA ENERGITEKNIKK AS | 995849860 | BÆRUM |
| GAIA GEOTEKNIKK AS | 933228703 | BÆRUM |
| GAIA PROSJEKT SIV.ARK. ROLF JACOBSEN | 976207564 | FÆRDER |
| GALGUFTEN BETONGPUMPING AS | 978669921 | OVERHALLA |
| GALTA RØR AS | 992154691 | STAVANGER |
| GAMITA HOLDING AS | 931417754 | DRAMMEN |
| GAMLEBYEN ARKITEKTER AS | 927656132 | FREDRIKSTAD |
| GAMLEBYEN BLIKK AS | 960011171 | OSLO |
| GAMMEL NOK AS | 999254195 | ASKER |
| GAMMELSÆTER MASKIN AS | 987168706 | HUSTADVIKA |
| GANDRUDBAKKEN MASKIN AS | 917210047 | FLÅ |
| GANGDAL RØYRSERVICE AS | 989513982 | LUSTER |
| GANITT ENTREPRENØR AS | 958672411 | KRAGERØ |
| GANN TRE AS | 979572034 | HÅ |
| GARBERG BYGG AS | 932215829 | TRONDHEIM |
| GARDA ROAD SAFETY AS | 992092742 | DRAMMEN |
| GÅRDEN RØRLEGGERSERVICE AS | 952677004 | BERGEN |
| GARDERMOEN ELEKTRO AS | 991277943 | ULLENSAKER |
| GARD MASKIN AS | 979458355 | STAVANGER |
| GAREN MASKIN AS | 989588621 | EIDFJORD |
| G ARKITEKTER AS | 990735581 | STAVANGER |
| GARTHE GRØNTANLEGG AS | 918831223 | RISØR |
| GARTNERHAGEN AS | 918583262 | OSLO |
| GÅSBAKK & SØNNER AS | 952140329 | LIERNE |
| GASS OG RØRSERVICE AS | 914828953 | PORSGRUNN |
| GAST ENTREPRENØR AS | 987627484 | OSLO |
| GAUKEN BYGG AS | 930775762 | SANDNES |
| GAULDAL BETONG AS | 918500464 | MIDTRE GAULDAL |
| GAULDAL BYGG AS | 918004726 | MELHUS |
| GAULDAL GRAVETJENESTER AS | 930216631 | MELHUS |
| GAUNDAL BYGGSERVICE AS | 922852766 | STEINKJER |
| GAUSTAD MASKIN Geir Henning Gaustad | 981439007 | BERGEN |
| GAUTESTAD TAKST OG KONSULT AS | 999329543 | EVJE OG HORNNES |
| GAVLEN MASKIN OG BYGG AS | 918164634 | ØYGARDEN |
| GBA BYGG AS | 915538932 | DRAMMEN |
| GB BYGG AS | 994509195 | GJESDAL |
| GBE BYGG AS | 927174146 | OSLO |
| GB.RØR AS | 998009847 | EIDSVOLL |
| GB RØRLEGGERMESTER AS | 989339060 | GRAN |
| GB RØR & VARMETEKNIKK AS | 931432486 | LARVIK |
| GBS ENTREPRENØR AS | 976926250 | KVAM |
| G-B SERVICE AS | 822214002 | TRONDHEIM |
| GBS PRODUKTER AS | 982328756 | ASKER |
| GB STORD AS | 985057907 | STORD |
| G-BYGG AS | 951360759 | HEIM |
| G CONSULT Vidar Gunnulfsen | 981911652 | SKIEN |
| GEBREMARIAM | 927653885 | DRAMMEN |