 | RANDEM & HÜBERT AS | 989653245 | OSLO |
| RANDERS TEGL NORGE AS | 914878977 | TØNSBERG |
| RANDØY MASKIN AS | 924404914 | HJELMELAND |
| RANES PUKK AS | 914297877 | SURNADAL |
| RANHEIM BYGGPARTNER AS | 913164903 | TRONDHEIM |
| R: ARKITEKTUR AS | 890767532 | KRISTIANSAND |
| RASCH RØRLEGGER | 989433830 | ELVERUM |
| RASHIDYAN OSLO RØR | 921578210 | OSLO |
| RASJONELL VVS AS | 924205075 | MOSS |
| RASMUSSEN ANLEGG AS | 977202795 | FLAKSTAD |
| RASMUSSEN ELEKTRO AS | 921625790 | SOLA |
| RASMUSSEN ERIK | 969956845 | VESTBY |
| RASMUSSEN MESTERBYGG AS | 986440046 | BÆRUM |
| Rasmussen & Skjelbred A/S | 946434086 | SANDEFJORD |
| RATIO ARKITEKTER AS | 962959407 | OSLO |
| RAUFOSS ELEKTRO AS | 911950707 | VESTRE TOTEN |
| RAUFOSS GRAVESERVICE AS | 999151914 | VESTRE TOTEN |
| RAUFOSS TAK OG BLIKK AS | 983569919 | VESTRE TOTEN |
| RAULAND BYGGTJENESTE AS | 912451291 | VINJE |
| RAULAND MASKIN AS | 988416053 | VINJE |
| RAUMA BYGGSERVICE AS | 987659106 | RAUMA |
| RAVI RÅDGIVNING AS | 995705044 | HÅ |
| RAVNANGER HUS AS | 885779522 | ASKØY |
| RAVNDAL STÅLBYGG AS | 914414342 | GJESDAL |
| RAYMOND ARONSEN TRANSPORT & GRAVING AS | 811998222 | FROLAND |
| RAYMOND'S RØRSERVICE AS | 911966719 | BODØ |
| RAZMAS BYGG AS | 917747482 | DRAMMEN |
| RBBYGG AS | 993503037 | OSLO |
| RB EIENDOMSUTVIKLING AS | 993786004 | ØYER |
| RB GRAVING OG TRANSPORT AS | 990565260 | ASKER |
| RBI SERVICE AS | 920649076 | OSLO |
| R B JOHANNESSEN AS | 960461827 | SVEIO |
| RB SNEKKERSERVICE AS | 926960717 | GOL |
| RBYGG AS | 931014722 | LILLESTRØM |
| R Daaland AS | 929188292 | TRONDHEIM |
| RD BORING OG SPRENGNING AS | 991324267 | KRISTIANSAND |
| REAKTOR AS | 817756182 | OSLO |
| REALBYGG LARVIK AS | 915498051 | LARVIK |
| REAL BYGGTEKNIKK AS | 929474929 | PORSGRUNN |
| REAL ELEKTRO AS | 928159191 | OSLO |
| REALKOMPANIET AS | 931243969 | NORD-FRON |
| REALT BYGG & ANLEGG AS | 932026198 | LARVIK |
| RE ARKITEKTUR AS | 980352609 | TØNSBERG |
| RE BYGG AS | 930632260 | TØNSBERG |
| RE-BYGG AS | 951962449 | GLOPPEN |
| RECOVER AS | 995761440 | OSLO |
| REDE ARKITEKTER AS | 990644411 | OSLO |
| REFRAME ARKITEKTUR AS | 915545343 | OSLO |
| REGGESTAD BYGG AS | 990993610 | HOLMESTRAND |
| REGIEC BYGG AS | 911651033 | BÆRUM |