 | THORVALDSEN OG HARLEM RØR AS | 930841757 | FREDRIKSTAD |
| THOR WIKE & Co AS | 960957334 | HOLMESTRAND |
| TH.S.ENTREPRENØR AS | 923185844 | LILLESTRØM |
| THUNBERG ENTREPRENØR AS | 913827139 | LARVIK |
| THUVE'N ANLEGG & BANE AS | 913714377 | STANGE |
| THV AS | 997448227 | HÆGEBOSTAD |
| T. I. LARSEN RØRLEGGER AS | 991445404 | KRISTIANSAND |
| TILLER-VIMEK AS | 980043959 | SØR-FRON |
| TILSETH AS | 979579330 | VOLDA |
| TIMBERBYGG AS | 922577021 | TRONDHEIM |
| TIME ALUMINIUM AS | 986482229 | SANDNES |
| TIME ELEKTRO AS | 960016785 | TIME |
| TIND1 AS | 989892991 | BÆRUM |
| TINDE HYTTER AS | 985135282 | NORD-FRON |
| TINE SA | 947942638 | OSLO |
| TINGVOLL ELEKTRO AS | 977540771 | TINGVOLL |
| TINGVOLL RØR AS | 980866998 | TINGVOLL |
| TINNES-MORK MASKIN | 945777834 | HORTEN |
| TINNOSET BYGG OG LAFT AS | 992849339 | NOTODDEN |
| TIPPETUE ARKITEKTER AS | 980043924 | BERGEN |
| TITAN BYGG AS | 921542887 | NORDKAPP |
| TIVETA AS | 998718724 | OSLO |
| TIVETA BETONG AS | 920756395 | OSLO |
| T-J BYGG AS | 927534363 | ALTA |
| TJENESTESERVICE AS | 919322519 | LIERNE |
| TJØME RØRSERVICE AS | 985471304 | FÆRDER |
| TK BYGGTEAM AS | 927608480 | ØVRE EIKER |
| TK ELEVATOR NORWAY AS | 828447742 | OSLO |
| TK HOME SOLUTIONS NV FILIAL NORGE | 915103197 | OSLO |
| TK MASKINDRIFT AS | 916867433 | FREDRIKSTAD |
| TKØ AS | 925880825 | GJERSTAD |
| TK RØRLEGGERSERVICE AS | 919854898 | SANDNES |
| TK RØRTEKNIKK AS | 997990897 | OSLO |
| TK RULLETRAPPER AS | 947218476 | OSLO |
| TKS BYGG AS | 971077921 | SANDEFJORD |
| TKS HEIS AS | 978681239 | HÅ |
| TKT AS | 925621927 | SANDEFJORD |
| TKT INNEKLIMA AS | 923792333 | PORSGRUNN |
| TL BOLIG AS | 921955723 | INDRE ØSTFOLD |
| T.L BYGG AS | 919059044 | HAMAR |
| T LEER BYGGSERVICE AS | 919999977 | SIGDAL |
| TL MASKIN AS | 993642193 | NORDRE LAND |
| TLS ELEKTRO AS | 920416721 | LIER |
| TMA BYGG AS | 927181622 | FREDRIKSTAD |
| TM BETONG AS | 991654887 | DRANGEDAL |
| TM BYGGSERVICE AS | 926311158 | SANDNES |
| TM BYGGSYSTEM AS | 928067572 | FREDRIKSTAD |
| TM BYGGTEK AS | 913071409 | GJESDAL |
| TM BYGG Trygve Magerøy | 992126825 | AUKRA |
| TMC BYGG AS | 918852166 | LILLESTRØM |