 | TRØNDELAG FJELL & ANLEGG AS | 930575771 | MIDTRE GAULDAL |
| TRØNDELAG FORSKALING AS | 971579781 | VERDAL |
| TRØNDELAG PIPESENTER AS | 995145960 | ORKLAND |
| TRØNDELAG TAK AS | 920280218 | TRONDHEIM |
| TRONDENES MASKIN AS | 925540358 | HARSTAD |
| TRØNDERBLIKK AS | 961800986 | TRONDHEIM |
| TRØNDER-BYGG AS | 925814997 | STJØRDAL |
| TRØNDERELEMENT AS | 987692472 | FLATANGER |
| TRØNDERMUREREN FRODE EGGEN | 991868712 | TRONDHEIM |
| TRØNDERPLAN AS | 946481599 | NAMSOS |
| TRØNDER-SVEIS AS | 947708597 | MELHUS |
| TROND HEDLAND AS | 951083305 | SANDNES |
| TROND HEGGLAND AS | 982098947 | BERGEN |
| TRONDHEIM BAD OG BYGGTEKNIKK AS | 926641514 | TRONDHEIM |
| TRONDHEIM EL AS | 915492649 | TRONDHEIM |
| TRONDHEIM MURSERVICE AS | 986631305 | TRONDHEIM |
| TRONDHEIM STÅL AS | 952272462 | MELHUS |
| TRONDHEIM TAK AS | 988608343 | TRONDHEIM |
| TRONDHEIM VENTILASJON AS | 928060195 | TRONDHEIM |
| TRONDHEIM VVS AS | 935505836 | TRONDHEIM |
| TRONDHEIM WORKS AS | 929555120 | TRONDHEIM |
| TRONDHJEM BOLIG AS | 926592939 | TRONDHEIM |
| TROND MARTENS SIVILARKITEKT | 984702906 | DRAMMEN |
| TROND M RUUD OLSEN | 970464506 | STANGE |
| TROND WEAN | 974398575 | INDRE FOSEN |
| TRONES MASKIN AS | 818697902 | VESTVÅGØY |
| TRONFJELL MASKIN AS | 914103509 | ALVDAL |
| TRØNNES BYGG AS | 912155455 | FOLLDAL |
| TRONRUD BETONG AS | 923581421 | HOLMESTRAND |
| TRONRUD EIENDOM AS | 942984154 | RINGERIKE |
| TRONSLIEN AS | 966026294 | OSLO |
| T-RØR AS | 918281460 | LEVANGER |
| TROSTEN CONSULT AS | 928779289 | TANA |
| TR-SERVICE AS | 911792389 | KRISTIANSAND |
| TRUDE NORDDAL ARKITEKTUR AS | 931628607 | TRONDHEIM |
| TRULS & PETTER RØRLEGGERSERVICE AS | 985820872 | BERGEN |
| TRULSSEN MASKIN AS | 996454037 | MÅLSELV |
| TRULS TØRRISPLASS AS | 990021945 | NESBYEN |
| TRYCM AS | 936603866 | KRISTIANSAND |
| TRYGGBYGG AS | 836095812 | VESTRE TOTEN |
| TRYGG BYGG&RØR AS | 930579890 | OSLO |
| TRYGG ELEKTRO AS | 922409692 | OSLO |
| TRYGG PÅ BYGG AS | 935663512 | KRISTIANSAND |
| TRYGG VVS AS | 998380448 | OSLO |
| TRYGVE ESPELAND MURARFORRETNING AS | 965853944 | SOGNDAL |
| TRYGVE RYE-JOHNSON AS | 913181271 | SANDEFJORD |
| TRYGVE ULLALAND AS | 979734689 | KINN |
| TRY RØR AS | 981957075 | KRISTIANSAND |
| TRYSIL ENTREPRENØR AS | 921005121 | TRYSIL |
| TRYSIL FLIS & MALERSENTER AS | 977165539 | TRYSIL |
| TRYSIL PUKKVERK AS | 995976285 | TRYSIL |
| TRYSIL RØRLEGGERBEDRIFT AS | 931264745 | TRYSIL |
| T.SANDSGÅRD ANLEGG AS | 988370924 | VINDAFJORD |
| T.S.B. SNEKKER AS | 919166274 | FREDRIKSTAD |
| 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 |