 | RØR & SVEISESERVICE AS | 929470494 | SARPSBORG |
| RØR SYSTEM AS | 996754316 | OSLO |
| RØR SYSTEM RENKAW | 932842041 | OSLO |
| Rørteam AS | 931046233 | GJERDRUM |
| RØRTEAMET AS | 932433745 | MOSS |
| RØRTEC AS | 937560753 | RAKKESTAD |
| RØR TECH AS | 833410962 | SKIEN |
| RØRTEFT AS | 975983862 | LILLESTRØM |
| Rør Tek A/S | 946279900 | STEINKJER |
| RØRTEK HAMMERFEST AS | 930067571 | HAMMERFEST |
| RØRTEKNIKK AS | 984047673 | STJØRDAL |
| RØRTEKNIKK NORD AS | 935675359 | TROMSØ |
| 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 |
| ROSENDAL BYGG AS | 926969730 | TRONDHEIM |
| ROSENGREN BYGG AS | 995209888 | STAVANGER |
| ROSER BOLIG AS | 921142358 | TØNSBERG |
| 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 |
| RØSTGÅRD BYGG AS | 913589742 | VÆRØY |
| ROSVALD HÅNDVERK | 936683843 | SØR-VARANGER |
| RØTA AS | 988937509 | HOL |
| ROTEIGEN - BYGGRÅDGIVNING OG UAVHENGIG KONTROLL | 924939354 | OSLO |
| ROTWITT BYGNINGSFYSIKK AS | 935019109 | ARENDAL |
| ROVIK BYGG AS | 930855480 | SANDNES |
| RØVIK MULTISERVICE AS | 921715595 | STJØRDAL |
| ROX MASKIN AS | 922877610 | ALTA |
| ROYAL RØRLEGGER SERVICE AS | 923803416 | OSLO |
| ROYAL RØR OSLO AS | 918335560 | OSLO |
| RØYKEN ENTREPRENØR AS | 911887401 | ASKER |
| 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 WIBORG AS | 998529808 | SOGNDAL |
| ROY-YNGVE THOMASSEN AS | 890024432 | ALTA |
| RPS VARME OG BAD AS | 935956307 | AURSKOG-HØLAND |
| R&R BYGG AS | 923712860 | VESTVÅGØY |
| R&R BYGGSERVICE AS | 925747297 | KARASJOK |
| RR TEKNIKK AS | 836603702 | ASKØY |
| RR VARME AS | 932874881 | HOLMESTRAND |
| R.S ANLEGG AS | 932942518 | RINGERIKE |
| RS BYGGETJENESTER AS | 927328755 | OSLO |
| RS-BYGG OG EIENDOM AS | 921177976 | TRONDHEIM |
| RS BYGG & REHABILITERING AS | 914793203 | ØYGARDEN |
| RSE ENTREPRENØR AS | 979973810 | FREDRIKSTAD |
| RS GULV AS | 927892510 | NAMSOS |
| RS MASKIN ROBERT STRANDHEIM | 925499560 | NORD-FRON |
| R SMEBY FORSKALING & BETONG AS | 994698516 | DRAMMEN |
| RSM FASADE AS | 913009681 | SANDNES |
| RSØ CONSULT AS | 931620029 | ØRSTA |
| RS RØR AS | 916594402 | RINGERIKE |
| RS RØR SERVICE AS | 923049827 | OSLO |
| RST FYR OG FLIS AS | 936347428 | STAVANGER |
| RS TØMRERSERVICE AS | 916162510 | MARKER |
| RTEK ENTREPRENØR AS | 927310899 | KARASJOK |
| RT ENTREPRENØRSERVICE AS | 918768262 | RISØR |
| RTH PROSJEKT AS | 997079760 | FREDRIKSTAD |
| RTMA AS | 831250402 | BÆRUM |
| RUBBHALL AS | 929363477 | KRØDSHERAD |
| RUD AS | 996516520 | ASKER |
| RUDI BYGG AS | 817181112 | SULA |
| RUDI & SKOGUM BYGG AS | 976376099 | SEL |
| RUD RØRLEGGER AS | 999326552 | LILLEHAMMER |
| RUFA TRADING AS | 992431326 | STAVANGER |
| RUGTVEDT BYGG AS | 924436328 | PORSGRUNN |
| RUNAA AS | 985727767 | SEL |
| RUNE BREKKA AS | 911673169 | KRAGERØ |
| RUNE EKREN VVS | 992110066 | MELHUS |
| RUNE JOHANNESSEN AS | 980840956 | BERGEN |
| RUNE NORDAHL ENTREPRENØRFORRETNING AS | 962071228 | BERGEN |
| RUNE-NYGÅRD AS | 918924132 | SKIEN |
| RUNE ROMSDAL AS | 923485104 | NORDRE FOLLO |
| RUNE SANDVIK AS | 980011305 | KINN |
| RUNE'S MASKIN AS | 889765852 | TYSNES |
| RUNE TALBERG RØRLEGGER AS | 916715080 | SARPSBORG |
| RUNE VAADAN AS | 992815604 | TRONDHEIM |
| RUNE W. JOHANSEN BYGNINGSFIRMA AS | 987988584 | FÆRDER |
| RUPRO AS | 928891275 | ORKLAND |
| RUSÅNES FABRIKKER AS | 928759393 | SALTDAL |
| RUSTAD BYGG AS | 929343085 | HORTEN |
| RUSTUGUSETRA AS | 918147616 | NORD-FRON |