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| VVS SERVICE AS | 898573532 | SVALBARD |
| VVS SERVICE RUNE BERGE AS | 987839082 | FJALER |
| VVS SØR AS | 928900495 | ARENDAL |
| VVS SPESIALISTEN AS | 915181562 | OSLO |
| VVS TEAM SENTRAL AS | 916907362 | TROMSØ |
| VVS TJENESTEN AS | 924374497 | SARPSBORG |
| VVS TRØNDELAG AS | 930674478 | MELHUS |
| VVS, VARME OG ENERGI AS | 927564262 | BÆRUM |
| WAAGE ANLEGG AS | 926645587 | FITJAR |
| WABU AS | 963336489 | BERGEN |
| WALAN MASKIN AS | 996260917 | ULLENSAKER |
| WAL BYGG OG EIENDOM AS | 811573272 | OSLO |
| WALDELAND & DUBLAND AS | 989138502 | HÅ |
| WALDELAND MASKIN AS | 817446892 | HÅ |
| WALDELAND & VARHAUG AS | 979924313 | HÅ |
| WALHEIM AS | 992078626 | GJØVIK |
| WALLAX AS | 960356705 | BÆRUM |
| WALLENTIN AS | 916072600 | SARPSBORG |
| WALLIN BYGG & EIENDOM AS | 932328992 | RAUMA |
| WALLØE & NILSEN AS | 929114779 | BERGEN |
| WALTER WILHELMSEN AS | 970904468 | TROMSØ |
| WALTHER KARPPINEN & SØNN AS | 913336429 | TØNSBERG |
| WALTHER SÆTHRE & CO AS | 983632963 | SOGNDAL |
| WANDSVIK ROAR | 970538992 | LEVANGER |
| WANGBERG VVS AS | 957474292 | TRONDHEIM |
| WARI HUS AS | 925621897 | GRIMSTAD |
| WARLOFF FJELLSPRENGING AS | 996884309 | ØVRE EIKER |
| WARMBRODT VVS AS | 994501267 | LINDESNES |
| WATNCONSULT AS | 915679110 | TRONDHEIM |
| WATZEK BYGG WACLAW SLIWA | 990972338 | BÆRUM |
| WAX HUS AS | 971220953 | DRAMMEN |
| W&B ARKITEKTER AS | 847647132 | FÆRDER |
| WB. BYGG KOMPETANSE AS | 928706869 | FROGN |
| WBL AS | 914110653 | ØRLAND |
| WEBERG AS | 928785890 | OSLO |
| WEDDES RØRSERVICE AS | 998517915 | NÆRØYSUND |
| WEDUM & CO AS | 981187601 | GAUSDAL |
| WEDUM ELEKTRO AS | 982921554 | LILLEHAMMER |
| WEENBO PROSJEKTLEDELSE AS | 996546969 | ULLENSAKER |
| WEGLO DESIGN, PLAN & LANDSKAP AS | 993814946 | BERGEN |
| WEIDER RØR AS | 994079867 | NAMSOS |
| WEL-BYGG AS | 975336468 | VESTBY |
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| WENCHE MEYER-OLSEN ARKITEKTKONTOR | 986167862 | BÆRUM |
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| WESPI AS | 911914298 | SENJA |
| WESSEL ENTREPRENØR AS | 991422110 | AURE |
| WESTAD MASKIN | 879951682 | AVERØY |