 | RØRTEKNIKK VVS AS | 974281023 | OSLO |
| RØRTEK SØR AS | 931118889 | KRISTIANSAND |
| RØRTEMA AS | 914622077 | LILLESTRØM |
| RØRTEMA PROSJEKT AS | 931352725 | LILLESTRØM |
| RØRTEQ AS | 928568717 | NÆRØYSUND |
| RØRTJENESTEN AS | 998185823 | MELHUS |
| RØRTJENESTE NORD AS | 991534903 | NORDREISA |
| RØR & VARME AS | 956517397 | OSLO |
| RØRVERKET AS | 991845771 | OSLO |
| ROSBACH & FORSLAND BYGG AS | 930829382 | SKIEN |
| RØSBJØRGEN BYGG AS | 921422393 | MELHUS |
| ROSENDAL BYGG AS | 926969730 | TRONDHEIM |
| ROSENENG MASKIN AS | 919187093 | PORSANGER |
| ROSENGREN BYGG AS | 995209888 | STAVANGER |
| ROSENMEYER AS | 923119426 | NARVIK |
| ROSER RØR | 969958651 | NESODDEN |
| RØSET AS | 997327837 | SELBU |
| ROSLAND BYGG | 997768493 | SKIEN |
| ROSMEK AS | 986680829 | NITTEDAL |
| ROSMO AS | 989188488 | TRONDHEIM |
| ROSSING RØRLEGGERBEDRIFT AS | 999562442 | OSLO |
| RØSSNES MASKIN AS | 918852883 | FÆRDER |
| ROSS SNEKKERTJENESTER AS | 986994653 | MELHUS |
| RØSTAD ENTREPRENØR AS | 963199724 | VERDAL |
| RØTA AS | 988937509 | HOL |
| ROVIK BYGG AS | 930855480 | SANDNES |
| RØVIK MULTISERVICE AS | 921715595 | STJØRDAL |
| ROYAL RØRLEGGER SERVICE AS | 923803416 | OSLO |
| ROY KENNETH BYBERG | 970361030 | KLEPP |
| RØYNSTRAND ENTREPRENØR AS | 987020075 | ULLENSVANG |
| ROY PAULSEN | 976290690 | ARENDAL |
| RØYRLEGGJAR INGMAR FIMREITE AS | 965112170 | SOGNDAL |
| RØYRLEGGJARSERVICE AS | 913238087 | LUSTER |
| RØYRVIK BYGG OG BETONG AS | 964088780 | VIK |
| RØYSETH MASKIN AS | 911715732 | SUNNFJORD |
| RØYSLAND BYGG AS | 995244721 | LILLESAND |
| ROY-YNGVE THOMASSEN AS | 890024432 | ALTA |
| RP BYGG & EIENDOM AS | 998823919 | TØNSBERG |
| R&R BYGG AS | 923712860 | VESTVÅGØY |
| R&R BYGGSERVICE AS | 925747297 | KARASJOK |
| R/S ANLEGGSGARTNERSERVICE AS | 922613400 | INDRE ØSTFOLD |
| RS BYGGETJENESTER AS | 927328755 | OSLO |
| RS-BYGG OG EIENDOM AS | 921177976 | TRONDHEIM |
| RS BYGG & REHABILITERING AS | 914793203 | ØYGARDEN |
| RSE ENTREPRENØR AS | 979973810 | FREDRIKSTAD |
| RS-EIENDOMSVERDI AS | 999631916 | HARSTAD |
| RS FORSKALING AS | 917723761 | MOSS |
| RS GULV AS | 927892510 | NAMSOS |
| RS MASKIN ROBERT STRANDHEIM | 925499560 | NORD-FRON |
| R SMEBY FORSKALING & BETONG AS | 994698516 | DRAMMEN |