 | UNION EIENDOMSUTVIKLING AS | 935711320 | DRAMMEN |
| UNION VVS AS | 930755869 | TRONDHEIM |
| UNIQON AS | 925704172 | STORD |
| UNI RØRSERVICE AS | 925810452 | OSLO |
| UNISPORT SCANDINAVIA AS | 889734132 | INDRE ØSTFOLD |
| UNI TAK AS | 912235319 | PORSGRUNN |
| UNITEK AS | 925470449 | TRONDHEIM |
| UNNESTAD BYGG AS | 921027702 | SKIPTVET |
| UNO BYGG AS | 980620328 | KRISTIANSAND |
| UNO DESIGN & ARKITEKTUR AS | 920499902 | BODØ |
| UNU ÅLESUND AS | 931707744 | ÅLESUND |
| UNU AS | 944830642 | KINN |
| UPPSTAD VVS AVDELING HOVDEN AS | 926698435 | BYKLE |
| URBA AS | 912180921 | OSLO |
| URBAN BYGGKONSULT AS | 825048642 | OSLO |
| URBAN ELEKTRO AS | 915448887 | STRANDA |
| URBANHUS KJEDEDRIFT AS | 917791686 | HAUGESUND |
| URBANHUS SØRVEST AS | 814425312 | SANDNES |
| URBANIUM ENTREPRENØR AS | 986744673 | OSLO |
| URBAN JUNGLE CONSULTING AS | 920221866 | OSLO |
| URD KLIMA OPPDAL AS | 980520560 | OPPDAL |
| URD KLIMA SANDNES AS | 980608646 | SANDNES |
| UREIST AS | 922171769 | BÆRUM |
| URHEIMS ELEKTROKOMPANI AS | 917027781 | BERGEN |
| URKE MASKINSERVICE AS | 914856191 | ULSTEIN |
| URLAUB IN NORWEGEN AS | 925891002 | BØMLO |
| U & S ENTREPRENØR AS | 928971279 | RINGERIKE |
| UTEANLEGG AS | 988044105 | FROGN |
| UTEROM ENTREPRENØR AS | 926136933 | LILLESTRØM |
| UTGARD ENTREPRENØR AS | 916783361 | NORD-AURDAL |
| UTNE ELEKTRO AS | 922041016 | SARPSBORG |
| UTPOST AS | 998321115 | PORSANGER |
| UTSIKT ARKITEKT OG DESIGN AS | 997234650 | TROMSØ |
| VAARDAL AS BLIKK OG VENTILASJON | 953436892 | KINN |
| VAB ARKITEKTER AS | 927642379 | INDRE ØSTFOLD |
| VA ENTREPRENØR RØRLEGGERN AS | 826768932 | SKIEN |
| VÆRNES AS | 917249431 | TRONDHEIM |
| VÅGEN & HANSEN UTEMILJØ AS | 999541380 | KRISTIANSAND |
| VAGLE MASKIN AS | 983054471 | SANDNES |
| VAGLID AS | 913414594 | TYSVÆR |
| VÅG LOFOTEN AS | 926108344 | VESTVÅGØY |
| VAKSDAL VARME OG SANITÆR AS | 997164083 | VAKSDAL |
| VAKTMESTERKOMPANIET AS | 911935589 | OSLO |
| VAKTMESTERKOMPANIET VEST AS | 979676867 | KINN |
| VALDERHAUG RØRHANDEL AS | 919262788 | GISKE |
| VALDRAS BYGG AS | 913521315 | SANDEFJORD |
| VALDRESBYGG AS | 955040163 | NORD-AURDAL |
| VALDRES ENERGI ENTREPRENØR AS | 922721319 | NORD-AURDAL |
| VALDRES ENTREPRENØR AS | 995781670 | VANG |
| VALDRES INSTALLASJON AS | 935762286 | NORD-AURDAL |