 | HOLBERG BYGG AS | 983190472 | LEVANGER |
| HOLDAHL MASKIN OG TRANSPORT AS | 924374829 | VESTVÅGØY |
| HOLDBAKK RØR AS | 987941278 | MELHUS |
| HOLDØ TAK OG MEMBRAN AS | 995543427 | VÅGAN |
| HOLE ANLEGG AS | 931776223 | SYKKYLVEN |
| HOLE GRAVESERVICE AS | 924469277 | HOLE |
| HOLE NIELSEN BYGG AS | 925113409 | BERGEN |
| HOLEN SIGVE | 969271877 | GJESDAL |
| HOLM AS | 951365084 | FLEKKEFJORD |
| HOLM BYGG OG MASKIN AS | 984824467 | NESBYEN |
| HOLM BYGGSERVICE AS | 923215417 | TRONDHEIM |
| HØLMEBAKK ØYMO AS | 894936932 | OSLO |
| HOLMEDAL ELEKTRISKE AS | 932303094 | ASKVOLL |
| HOLM ELEKTRO AS | 966727683 | MOLDE |
| HOLMGREN AS | 841669452 | NES |
| HOLMSKAU PROSJEKT AS | 991273166 | FREDRIKSTAD |
| HOLM VEITEKNIKK AS | 829214172 | VEFSN |
| HOLM VVS AS | 916155034 | RÆLINGEN |
| HOLO & HOLO LANDSKAPSARKITEKTUR AS | 932319810 | BÆRUM |
| HOLON BERGEN AS | 996052958 | BERGEN |
| HOLON HAUGESUND AS | 979521944 | HAUGESUND |
| HOLON STAVANGER AS | 992387793 | STAVANGER |
| HOL RØRSERVICE AS | 998178207 | HOL |
| HOLSTAD MASKIN AS | 928772616 | HAREID |
| HOLST & VALEN AS | 979831765 | BERGEN |
| HOLTA & HÅLAND SAFETY AS | 995911795 | RANDABERG |
| HOLTE BYGG AS | 990019738 | GJØVIK |
| HOLTEN MASKIN AS | 881345552 | SURNADAL |
| HOLTER VVS AS | 913699238 | LILLESTRØM |
| HOLTET PUKK & BETONG AS | 922693714 | KRØDSHERAD |
| HOLTHE ANLEGG AS | 917176183 | DRAMMEN |
| HOMME BYGG AS | 916917651 | KRISTIANSAND |
| HOMME HUS AS | 920481426 | KRISTIANSAND |
| HOMSTVEDT MASKIN | 915518850 | INDRE ØSTFOLD |
| HØNEFOSS RØRLEGGERBEDRIFT AS | 950349875 | RINGERIKE |
| HØNEFOSS SNEKKER & TØMRERFIRMA EDGARS OZOLS | 996192652 | RINGERIKE |
| HØNEFOSS VVS AS | 923789553 | RINGERIKE |
| HONEYWELL LIFE SAFETY AS | 981336305 | ASKER |
| HONGRØD AS | 931713868 | MIDTRE GAULDAL |
| HONNEMYR SERVICE V/KJETIL HONNEMYR | 816803152 | HÆGEBOSTAD |
| HONNINGSVÅG MASKIN AS | 934099192 | STAD |
| HOPE BYGG AS | 997009223 | TYSNES |
| HOPEN MASKIN | 930765880 | ØRLAND |
| HOPE VVS AS | 925510122 | ØYGARDEN |
| HOPSTAD & JENSEN MUR OG FLIS AS | 993572780 | DRAMMEN |
| HORDALAND RØRTEKNIKK AS | 989364669 | BJØRNAFJORDEN |
| HORN BYGG AS | 931562487 | TRONDHEIM |
| HORNEBERG BYGG AS | 987668059 | TRONDHEIM |
| HORTEN BYGG SERVICE AS | 921407076 | HORTEN |
| HORTEN TRANSPORT OG GRAVESERVICE DA | 846757392 | HORTEN |