 | TRYSIL FLIS & MALERSENTER AS | 977165539 | TRYSIL |
| TRYSIL PUKKVERK AS | 995976285 | TRYSIL |
| TRYSIL RØRLEGGERBEDRIFT AS | 931264745 | TRYSIL |
| TS BOLIG AS | 929465261 | ØVRE EIKER |
| T.S.B. SNEKKER AS | 919166274 | MOSS |
| T&S BYGG AS | 931978047 | NORDRE FOLLO |
| TS HÅNDVERK AS | 998580781 | ASKER |
| TST MASKIN AS | 812303902 | SUNNFJORD |
| 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 | STAVANGER |
| TT KABEL & ANLEGG AS | 995986655 | ÅSNES |
| TTM AS | 921154194 | LIER |
| TT MUR AS | 933434982 | GRIMSTAD |
| TTN ENTREPRENØR AS | 933861384 | AURSKOG-HØLAND |
| TTSS BYGGSERVICE AS | 896439952 | TØNSBERG |
| TT-TEKNIKK AS | 940484871 | LILLESTRØM |
| TUDDAL BYGGTJENESTE AS | 961440688 | HJARTDAL |
| TUDDAL GRAVING OG TRANSPORT AS | 975380416 | HJARTDAL |
| TUFT BYGG AS | 923316361 | LILLEHAMMER |
| TUFTEBYGG AS | 932086948 | LØRENSKOG |
| TUN ARKITEKTUR AS | 911979063 | TØNSBERG |
| TUNE BYGGSERVICE AS | 998864232 | SARPSBORG |
| TUNE GRAVESERVICE AS | 942435533 | 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 |
| 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 |
| TVEITABRU BYGG AS | 996374955 | VANG |
| TVEITA BYGG AS | 927033097 | KLEPP |
| TVEITAN MASKIN & EIENDOM AS | 994237632 | SANDEFJORD |
| TVEITEN BYGG AS | 931376888 | HÆGEBOSTAD |
| TVEITEN & RIIS MURMESTERFIRMA AS | 977088569 | SANDEFJORD |
| TVEIT MASKIN AS | 913306082 | VINDAFJORD |
| 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 |