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| HUSTOFT RØRSERVICE AS | 928722449 | ETNE |
| HUSTRE UAB | 913757246 | |
| HUSVARM AS | 998436478 | NESODDEN |
| HUSVIK NORWAY | 898141632 | |
| HUTH AS | 924926031 | FREDRIKSTAD |
| HVALBYE MUR AS | 930510300 | EIDSVOLL |
| HVAL BYGG AS | 926776134 | LIER |
| HVALER BYGG ENTREPRENØR AS | 988552690 | HVALER |
| HVALER RØRLEGGERBEDRIFT AS | 981691792 | HVALER |
| HVALSMARKEN BYGG AS | 914504546 | KRISTIANSAND |
| HVASSER ANLEGG OG TRANSPORT AS | 995904470 | FÆRDER |
| HVEEM ELEKTRO AS | 928127087 | ØSTRE TOTEN |
| HVERVEN VVS AS | 923437614 | MODUM |
| HVESSER HÅNDVERK | 924920564 | LINDESNES |
| HVITSAND ENTREPRENØR AS | 899660102 | ØRLAND |
| HWA AS | 967030783 | FÆRDER |
| HYEN RØR/TORGER EIMHJELLEN | 987669977 | GLOPPEN |
| HYLLAND AS | 984144725 | BERGEN |
| HYLLESTAD BYGG AS | 845721912 | HYLLESTAD |
| HYLLMARK BYGG AS | 931395998 | ØRLAND |
| HYTTEBYGGSERVICE AS | 911702274 | DRAMMEN |
| HYTTESERVICE- AS | 925301310 | ARENDAL |
| IAC VESTCOLD AS | 877301702 | SANDEFJORD |
| IBENHOLT CONSULT AS | 820579542 | TROMSØ |
| IBETONG AS | 916604580 | TIME |
| I BJØRØ KOBBER & BLIKK AS | 921524005 | BJØRNAFJORDEN |
| IB MASKIN AS | 994550144 | VOSS |
| I-BOLIG AS | 976746996 | ULLENSAKER |
| IBR INNSTALLASJON OG BYGGSERVICE AS | 981648196 | NORDRE FOLLO |
| I BYGG AS | 996013081 | TØNSBERG |
| ICC NORDEN AS | 821277302 | OSLO |
| ICOPALTAK AS | 984834683 | OSLO |
| IDAR NESE AS | 989082108 | ASKØY |
| IDEAL BETONG AS | 924782692 | KARMØY |
| IDEAL BYGG AS | 930089044 | MALVIK |
| IDÉHUS ÅLESUND AS | 991569405 | ÅLESUND |
| IDEHUS ASKER OG BÆRUM AS | 914922259 | ASKER |
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| IDEHUS ØSTFOLDBYGG AS | 990092966 | INDRE ØSTFOLD |
| IDEHUS ROMERIKE AS | 989384899 | EIDSVOLL |
| IDÉHUS TRONDHEIM AS | 885832202 | TRONDHEIM |
| IDLAND BYGG & BETONG AS | 994340972 | GJESDAL |
| IDLAND VVS AS | 912609170 | SANDNES |
| ID RØR AS | 928806782 | OSLO |
| I.E. CONSULT AS | 929564847 | HORTEN |
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| IFORM BYGG AS | 999325025 | TRONDHEIM |
| IGANG TOTALENTREPRENØR AS | 922987106 | KLEPP |
| IGNIST AS | 927386259 | OSLO |