 | 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 ARKITEKTUR AS | 923219706 | BERGEN |
| HOLON BERGEN AS | 996052958 | BERGEN |
| HOLON HAUGESUND AS | 979521944 | HAUGESUND |
| HOLON STAVANGER AS | 992387793 | STAVANGER |
| 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 |
| HOLTH BYGG & ANLEGG AS | 921533586 | FREDRIKSTAD |
| 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 |
| HORNEBERG BYGG AS | 987668059 | TRONDHEIM |
| HORTEN BYGG SERVICE AS | 921407076 | HORTEN |
| HORTEN TRANSPORT OG GRAVESERVICE DA | 846757392 | HORTEN |
| HORTEN VVS AS | 913301528 | HORTEN |
| HØSTMARK BYGG AS | 930941441 | BERGEN |
| HOUSE CONCEPT LT | 930592803 | |
| HØVA ELEKTRO AS | 967836257 | BERGEN |
| HØVÅG BYGG AS | 892512132 | LILLESAND |
| HOVDEN BYGG AS | 951330973 | FJORD |
| HOVDEN HYTTESERVICE AS | 979975902 | BYKLE |
| HOVELAND MASKIN AS | 927038463 | FARSUND |
| HOVIN LAFT AS | 998185939 | RINGERIKE |
| HOVIRO AS | 997158539 | ASKER |
| HOV PROSJEKT AS | 921298331 | MOLDE |
| HOVSTEN CONT & GJENVINNING AS | 912174719 | TRONDHEIM |
| HØYBRÅTEN RØRLEGGERBEDRIFT AS | 923701753 | OSLO |
| Høyer Odda AS | 939685154 | ULLENSVANG |