 | TVETER & LUND AS | 936772161 | LARVIK |
| TVETER RØRSERVICE AS | 929998111 | ENEBAKK |
| TVS AS | 988400173 | KVINNHERAD |
| TVS BYGG AS | 917524890 | TRONDHEIM |
| TW BYGG AS | 913062116 | FÆRDER |
| TW MUR OG BYGG AS | 929487893 | HOL |
| TYARK AS | 921190239 | BERGEN |
| TYDAL BYGDESERVICE SA | 985687021 | TYDAL |
| TYNES BYGG AS | 979948417 | SYKKYLVEN |
| TYNSETBYGG AS | 996831752 | TYNSET |
| TYNSET TAKST AS | 816902282 | TYNSET |
| TYNSET VARME & SANITÆR AS | 916954913 | TYNSET |
| TYRENS ENTREPRENØR AS | 833787322 | DRAMMEN |
| TYR GRUPPEN AS | 933786900 | OSLO |
| TYRI ARKITEKTER AS | 931835955 | TØNSBERG |
| TYSNES BYGG AS | 897279002 | TYSNES |
| TYSSE MASKIN AS | 934573870 | OSTERØY |
| TYSVÆR BYGG AS | 933227138 | TYSVÆR |
| TYTEK AS | 924914904 | STAVANGER |
| UANZ BYGG AS | 992627042 | STAVANGER |
| UAVHENGIG KONTROLL ULLENSAKER AS | 912086038 | ULLENSAKER |
| UBR AS | 912104028 | RINGSAKER |
| UDAHL MASKIN AS | 914775027 | GJØVIK |
| UDNES & HOLTER ENTREPRENØR AS | 924496339 | NES |
| UDNES UTEMILJØ AS | 989037218 | NES |
| UGLANE RØYR OG ANLEGG AS | 925834483 | SOGNDAL |
| ULEBERG MASKIN OG TRANSPORT AS | 960752023 | BYKLE |
| ULEBERG OG TRYDAL MASKIN AS | 924447575 | BYKLE |
| ULLENSAKER VENTILASJON & KJØLESERVICE AS | 934652673 | ULLENSAKER |
| ULLENSVANG BYGG AS | 945690437 | ULLENSVANG |
| ULLERN BYGG AS | 921336098 | OSLO |
| ULLESTAD OG JANSEN TRANSPORT AS | 857905172 | HJELMELAND |
| ULMO AS | 932958252 | ÅLESUND |
| ULSAKER & GJEILE BYGG AS | 912838749 | NORDRE LAND |
| ULSTEIN ANLEGG AS | 920446582 | HAREID |
| ULSTEIN. AS | 999326536 | VENNESLA |
| ULSTEIN ENTREPRENØR AS | 999503845 | ULSTEIN |
| ULVERSØY AS | 998895332 | RANDABERG |
| ULVESUND ELEKTRO AS | 981400224 | KINN |
| ULVIK KLIMAENTREPRENØR | 832515922 | BÆRUM |
| ULVIK VVS AS | 992106948 | ULVIK |
| UMBRA PRODUKTER AS | 941527272 | SANDEFJORD |
| UNDAL AS | 996399109 | HÅ |
| UNDERVERK BYGG AS | 918198946 | OSLO |
| UNIGRAV AS | 818597002 | ØVRE EIKER |
| UNIHOUSE SPOLKA AKCYJNA NUF | 923351426 | |
| UNIK BYGGMESTER AS | 934404130 | MOSS |
| UNIK FILTERSYSTEM AS | 943578990 | BJØRNAFJORDEN |
| UNIK VVS AS | 977051932 | BERGEN |
| UNIMASKIN AS | 912162788 | RANA |
| UNION VVS AS | 930755869 | TRONDHEIM |
| UNIQON AS | 925704172 | STORD |
| UNI TAK AS | 912235319 | PORSGRUNN |
| UNITEK AS | 925470449 | TRONDHEIM |
| UNIVERSAL GLASS & SOLSKJERMING AS | 913962834 | STAVANGER |
| 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 |
| URBAN ELEKTRO AS | 915448887 | STRANDA |
| URBANHUS SØRVEST AS | 814425312 | SANDNES |
| URBAN JUNGLE CONSULTING AS | 920221866 | OSLO |
| URBAN REUSE NORWAY AS | 988943312 | ASKER |
| URD KLIMA OPPDAL AS | 980520560 | OPPDAL |
| URD KLIMA SANDNES AS | 980608646 | SANDNES |
| UREIST AS | 922171769 | OSLO |
| URHEIMS ELEKTROKOMPANI AS | 917027781 | BERGEN |
| URKE MASKINSERVICE AS | 935215501 | 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 |
| UTOMHUSTEAM AS | 932421909 | MELHUS |
| UTSETØ HOLDING AS | 926137018 | VÅGAN |
| UTSIKT ARKITEKT OG DESIGN AS | 997234650 | TROMSØ |
| UTVENDIG RENOVERING AS | 930158747 | EIDSVOLL |
| VAARDAL AS BLIKK OG VENTILASJON | 953436892 | KINN |
| VAB ARKITEKTER AS | 927642379 | INDRE ØSTFOLD |
| VADSET BJØRN | 970899138 | ÅLESUND |
| VA ENTREPRENØR AS | 820504062 | SØR-AURDAL |
| VÆRNES AS | 917249431 | TRONDHEIM |
| VÅGEN & HANSEN UTEMILJØ AS | 999541380 | KRISTIANSAND |
| VAGLE MASKIN AS | 983054471 | SANDNES |
| VÅG LOFOTEN AS | 926108344 | VESTVÅGØY |
| VAKTMESTERKOMPANIET AS | 911935589 | OSLO |
| 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 |
| VALDRES MASKINSTASJON AS | 927280604 | ØYSTRE SLIDRE |
| VALDRES RØR AS | 996963071 | VESTRE SLIDRE |
| VALDRES TAK OG BLIKK AS | 894547952 | ØYSTRE SLIDRE |
| VALEN MARINA AS | 928255956 | ØYGARDEN |
| VALENZA FORSKALING AS | 993952826 | STORD |