 | TVS AS | 988400173 | KVINNHERAD |
| TVS BYGG AS | 917524890 | TRONDHEIM |
| TW MUR OG BYGG AS | 929487893 | HOL |
| TYARK AS | 921190239 | BERGEN |
| TYDAL BYGDESERVICE SA | 985687021 | TYDAL |
| TYNES BYGG AS | 979948417 | SYKKYLVEN |
| TYNSET TAKST AS | 816902282 | TYNSET |
| TYNSET VARME & SANITÆR AS | 916954913 | TYNSET |
| TYRI ARKITEKTER AS | 931835955 | TØNSBERG |
| TYRI BYGG AS | 915988512 | HOLMESTRAND |
| TYSNES BYGG AS | 897279002 | TYSNES |
| TYSSE MASKINUTLEIGE AS | 914240867 | OSTERØY |
| TYTEK AS | 924914904 | STAVANGER |
| U2 ARKITEKTER AS | 991429700 | BODØ |
| UAB SKYDMEDIS | 997952510 | |
| UANZ BYGG AS | 992627042 | STAVANGER |
| UAVHENGIG KONTROLL AS | 999167470 | GJERDRUM |
| UAVHENGIG KONTROLL OSLO AKERSHUS AS | 999146635 | ÅS |
| UAVHENGIG KONTROLL ULLENSAKER AS | 912086038 | ULLENSAKER |
| UBR AS | 912104028 | RINGSAKER |
| UDAHL MASKIN AS | 914775027 | GJØVIK |
| UDNES & AAS BYGG AS | 919626453 | NES |
| UDNES & HOLTER ENTREPRENØR AS | 924496339 | NES |
| UDNES UTEMILJØ AS | 989037218 | NES |
| UHREN VVS AS | 931372637 | NANNESTAD |
| ULEBERG MASKIN OG TRANSPORT AS | 960752023 | BYKLE |
| ULEBERG OG TRYDAL MASKIN AS | 924447575 | BYKLE |
| ULF GRYTEMARK | 915592406 | HOLMESTRAND |
| ULLENSAKER VENTILASJON AS | 816979072 | ULLENSAKER |
| ULLENSVANG BYGG AS | 945690437 | ULLENSVANG |
| ULLERN BYGG AS | 921336098 | OSLO |
| ULLESTAD OG JANSEN TRANSPORT AS | 857905172 | HJELMELAND |
| ULSAKER & GJEILE BYGG AS | 912838749 | NORDRE LAND |
| ULSTEIN. AS | 999326536 | VENNESLA |
| ULSTEIN ENTREPRENØR AS | 999503845 | ULSTEIN |
| ULVERSØY AS | 998895332 | RANDABERG |
| ULVESUND ELEKTRO AS | 981400224 | KINN |
| ULVIK VVS AS | 992106948 | ULVIK |
| ULVSVÅG MASKIN OG TRANSPORT AS | 988336947 | HAMARØY |
| UMBRA PRODUKTER AS | 941527272 | SANDEFJORD |
| UNDAL AS | 996399109 | HÅ |
| UNDERVERK BYGG AS | 918198946 | OSLO |
| UNDHEIM MASKIN AS | 896079212 | EIGERSUND |
| UNIGRAV AS | 818597002 | ØVRE EIKER |
| UNIHEIS AS | 936980058 | OSLO |
| UNIHOUSE SPOLKA AKCYJNA | 923351426 | |
| UNIK FILTERSYSTEM AS | 943578990 | BJØRNAFJORDEN |
| UNIK VVS AS | 977051932 | BERGEN |
| UNIMASKIN AS | 912162788 | RANA |
| UNION BYGG AS | 915048056 | OSLO |