 | TRYSIL RØRLEGGERBEDRIFT AS | 931264745 | TRYSIL |
| T.SANDSGÅRD ANLEGG AS | 988370924 | VINDAFJORD |
| T&S BYGG AS | 931978047 | NORDRE FOLLO |
| TS BYGG AS | 917682828 | INDRE FOSEN |
| TS HÅNDVERK AS | 998580781 | ASKER |
| TSL NORWAY AS | 834209772 | OSLO |
| TS TØMRERSERVICE AS | 820988132 | INDRE ØSTFOLD |
| TT ANLEGG AS | 916687435 | LINDESNES |
| T & T BYGG AS | 990057222 | HORTEN |
| TT BYGG AS | 994830236 | SANDNES |
| TT BYGGDRIFT AS | 926370502 | SANDNES |
| TT DESIGN TROJANOWSKI TOMASZ | 921368259 | SANDNES |
| TT KABEL & ANLEGG AS | 995986655 | ÅSNES |
| TTM AS | 921154194 | LIER |
| TT MUR AS | 933434982 | ARENDAL |
| TTN ENTREPRENØR AS | 933861384 | AURSKOG-HØLAND |
| TTSS BYGGSERVICE AS | 934901444 | TØNSBERG |
| TUDDAL BYGGTJENESTE AS | 961440688 | HJARTDAL |
| TUDDAL GRAVING OG TRANSPORT AS | 975380416 | HJARTDAL |
| TUFT BYGG AS | 923316361 | LILLEHAMMER |
| TUFTEBYGG AS | 932086948 | LØRENSKOG |
| TUFTENE TØMRARSERVICE | 919118067 | SOGNDAL |
| TUN ARKITEKTUR AS | 911979063 | TØNSBERG |
| TUNE BYGGSERVICE AS | 998864232 | SARPSBORG |
| TUNGESVIK BYGG AS | 980398919 | ETNE |
| TUNG RØR AS | 990741727 | INDRE FOSEN |
| TUNHEIM STUDIO | 932851903 | OSLO |
| TURHUS MASKIN AS | 998022231 | GOL |
| TUROFLOW AS | 915010601 | VERDAL |
| TURØY BYGG OG SNEKKERVERKSTED AS | 997898796 | ØYGARDEN |
| TUSSA INSTALLASJON AS | 915050514 | ØRSTA |
| TUVALU ARKITEKTER AS | 918435174 | OSLO |
| TUVAN MASKIN | 921138997 | FOLLDAL |
| TUV TRANSPORT AS | 917338655 | BODØ |
| T.VÅGE AS | 927442957 | ASKØY |
| TVA TEKNIKK AS | 916952376 | SARPSBORG |
| TVB BOLIG AS | 987259787 | SKIEN |
| TV BYGG AS | 998141745 | ØVRE EIKER |
| TVEITA BYGG AS | 927033097 | KLEPP |
| TVEITAN MASKIN & EIENDOM AS | 994237632 | SANDEFJORD |
| TVEITEN BYGG AS | 931376888 | HÆGEBOSTAD |
| TVEITEN & RIIS MURMESTERFIRMA AS | 977088569 | SANDEFJORD |
| TVEIT OG ASKVIK BYGG AS | 915109020 | BJØRNAFJORDEN |
| TVEIT OG TJOMLID MASKIN AS | 983349013 | SIRDAL |
| TVEITO MASKIN AS | 812488872 | NOME |
| TVERÅS MASKIN & TRANSPORT AS | 958324014 | STJØRDAL |
| TVERLI SVEIS AS | 982582482 | ENEBAKK |
| TVERRSNITT AS | 920502512 | VERDAL |
| 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 |
| 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 & AAS BYGG AS | 919626453 | NES |
| 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 |
| 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 |