 | HOVSTEN CONT & GJENVINNING AS | 912174719 | TRONDHEIM |
| HØYBRÅTEN RØRLEGGERBEDRIFT AS | 923701753 | OSLO |
| Høyer Odda AS | 939685154 | ULLENSVANG |
| HØYLANDET RØR AS | 913162854 | HØYLANDET |
| HØYSPENT ØST AS | 917741212 | OSLO |
| HØYT & LAVT AS | 986565817 | RINGERIKE |
| HØYVEG MEKANISKE VERKSTED AS | 940471079 | DOVRE |
| HPH BYGGENTREPRENØR AS | 921399219 | FREDRIKSTAD |
| HP HOLM BYGG & TØMRERMESTER AS | 917152020 | HALDEN |
| HR BYGGMESTERFORRETNING AS | 928743748 | ASKØY |
| HR ENTREPRENØR AS | 914895731 | OS (INNLANDET) |
| HR FJELLSPRENGNING AS | 919393823 | ALVER |
| HRL ENTREPRENØR AS | 987259760 | PORSGRUNN |
| HRO AS | 932760630 | RINGERIKE |
| HRP AS | 988889245 | OSLO |
| HR RØR AS | 912666344 | OSLO |
| HR SPRINKLER AS | 913566793 | OSLO |
| HRTB AS | 912838161 | OSLO |
| H SÆTHER VVS AS | 988393975 | HITRA |
| H SANDVIK AS | 989482920 | ALVER |
| H/S ANLEGG AS | 930374067 | AURSKOG-HØLAND |
| H.S BYGG AS | 931903101 | SELBU |
| HS BYGG AS | 936854044 | STRYN |
| H/S ELEKTRO AS | 926523740 | INDRE ØSTFOLD |
| HS KAPSTAD AS | 994000691 | SUNNFJORD |
| HSN BYGG AS | 898356612 | OSLO |
| HSPROSJEKT KHASRAW SABIR | 933818268 | FREDRIKSTAD |
| HS RISE BYGG AS | 955880447 | HAREID |
| HST MASKIN AS | 997345673 | SKIEN |
| HS TØMRER SERVICE AS | 920734197 | HOLMESTRAND |
| HSV BYGGSERVICE AS | 922123926 | GOL |
| HS VVS AS | 930177148 | NORDRE FOLLO |
| HSW BYGG AS | 918842551 | OS (INNLANDET) |
| HT BYGG HELLESYLT AS | 964888124 | STRANDA |
| HTC GROUP AS | 930670634 | BÆRUM |
| H.THANKE BYGG AS | 992831286 | ULLENSAKER |
| HTL ELECTRIC GROUP AS | 938235767 | HUSTADVIKA |
| HTP ENTREPRENØR AS | 931398407 | INDRE ØSTFOLD |
| HT RØR AS | 994205161 | TROMSØ |
| H. T. VIKE AS | 998590604 | SANDEFJORD |
| HUBERT REHABILITERING AS | 991052410 | NORDRE FOLLO |
| HUBERT WEIGOLD | 892920702 | HITRA |
| HUBRO GLASS OG ALUMINIUM AS | 921075928 | SOLA |
| HUG BETONG AS | 821620392 | ÅLESUND |
| HUGLO MASKIN AS | 929190211 | AUSTEVOLL |
| HUMBERSET MASKIN AS | 917998736 | VOLDA |
| HUMLEN & MOLVÆR ELEKTRO AS | 939389040 | SULA |
| HUNDAL BYGG AS | 920602436 | OSLO |
| HUNDELAND BYGG AS | 923432183 | LILLESAND |
| HUNDORP RØRLEGGERSERVICE AS | 965624988 | NORD-FRON |