 | 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 MILJØ AS | 929503341 | OSLO |
| H2 RØR AS | 912749460 | RANDABERG |
| HA 1 BOLIG AS | 932165074 | SØR-VARANGER |
| HAAKULL & ERSLAND AS | 967265780 | VINDAFJORD |
| HAALAND AS | 920520146 | RANA |
| HAALAND KLIMA AS | 986897526 | OSLO |
| HAANDVERKERNE AS | 979440499 | ASKER |
| HAARSTAD ERIK SIVILARKITEKT MNAL | 970277005 | OSLO |
| HAATRE AS | 923931015 | SULA |
| HAAVE GRAVESERVICE AS | 921183143 | NOTODDEN |
| HAB CONSTRUCTION AS | 985386854 | BÆRUM |
| HABEX AS | 912544931 | SIGDAL |
| HABI AS | 967866210 | STAVANGER |
| HABITAT AS | 993058602 | BÆRUM |
| HÅ BYGGTEKNIKK AS | 912382680 | HARSTAD |
| HADARHUS AS | 892624992 | HAREID |
| HADDING ELEKTRO AS | 912079449 | NESBYEN |
| HADELAND ELEKTRO AS | 992896981 | GRAN |
| HADELAND MASKINDRIFT AS | 991100296 | GRAN |
| HADELAND STÅL OG GIPSMONTASJE AS | 990102600 | LUNNER |
| HADELAND VVS AS | 817887082 | LUNNER |
| HADENE BYGG AS | 916846738 | LUNNER |
| HADSEL BYGG OG VEDLIKEHOLD AS | 986069216 | HADSEL |
| HADSEL MASKIN AS | 964564027 | HADSEL |
| HÆDER BETONG AS | 935786568 | SANDNES |
| HÆHRE ENTREPRENØR AS | 986420010 | MODUM |
| HÅ ELEMENT AS | 923629211 | HÅ |
| HAFA ELEKTRO AS | 958061838 | LARVIK |
| HAFJELL MASKIN AS | 985369771 | ØYER |
| HAFRSFJORD RØR AS | 935317975 | STAVANGER |
| HAFS ELEKTRO & RØR AS | 934466152 | HYLLESTAD |
| HAGA & BERG ENTREPRENØR AS | 880409972 | OSLO |
| HAGA BOLIG AS | 918112278 | STAVANGER |
| HAGA INSTALLASJON AS | 999544398 | STAVANGER |
| HAGEANLEGG AS | 960571630 | TRONDHEIM |
| HAGELIN BYGGSERVICE AS | 932516063 | FREDRIKSTAD |
| HAGELSTEEN VVS AS | 999266711 | HOLE |
| HAGE & MASKIN AS | 930181765 | KARMØY |
| HAGEMEISTER RESET BYGG AS | 923029834 | KVINNHERAD |
| HAGEN BYGG AS | 925756741 | ASKER |
| HAGENBYGG AS | 996415899 | OPPDAL |
| HAGENES AS | 991812474 | BERGEN |
| HAGEN MASKIN AS | 999076890 | ASKER |