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| POWERPEX AS | 916967225 | LIER |
| POWER SOLUTIONS MMO AS | 811713112 | ALTA |
| POWERTECH AS | 897688182 | DRAMMEN |
| POWERTECH SERVICE AS | 913133978 | LIER |
| POWWOW ARKITEKTER AS | 915407064 | OSLO |
| PPM PROSJEKT TRONDHEIM AS | 921882440 | TRONDHEIM |
| PRAKSIS A AS | 911582295 | OSLO |
| PRAKSIS ARKITEKTER AS | 979468520 | STEINKJER |
| PRAKT BYGG AS | 912308731 | BÆRUM |
| PRE-CON AS | 915949339 | SØR-ODAL |
| PREFAB DESIGN AS | 897350122 | STAVANGER |
| PREG BOLIG AS | 917476411 | ASKER |
| PREMIUM INNREDNING AS | 927926504 | ASKØY |
| PRESIS VEGDRIFT AS | 914888794 | BERGEN |
| PRETRE AS | 884647762 | STRYN |
| PRO ARKITEKT AS | 914194423 | DRAMMEN |
| PROBALTIC AS | 919325593 | RÆLINGEN |
| PROBY AS | 911709031 | SANDNES |
| PRO BYGGESERVICE AS | 927326248 | MOSS |
| PROCEED AS | 916878575 | ASKØY |
| PROCESS INSTALLATION AS | 918686762 | KRISTIANSAND |
| PROCON AS | 960193466 | KARMØY |
| PROCON RÅDGIVENDE INGENIØRER AS | 975874532 | STAVANGER |
| PROCON SPRINKLER AS | 932576996 | BERGEN |
| PROCUT AS | 980394972 | RAUMA |
| PRO DOK 3D AS | 924486961 | STAVANGER |
| PROEL AS | 983980031 | VÅGÅ |
| PROESS AS | 921636326 | ÅLESUND |
| PROFAB HOUSES | 916687281 | SARPSBORG |
| PROFF BYGGMESTER AS | 996428265 | LILLESTRØM |
| PROFFBYGG PL AS | 989748459 | BÆRUM |
| PROFF ELEKTRO AS | 996341275 | TRONDHEIM |
| PROFF EL&IT AS | 916519338 | ORKLAND |
| PROFF HÅNDVERKER GROUP AS | 920878555 | AURSKOG-HØLAND |
| PROFFLIS & PUSS AS | 921000626 | OSLO |
| PROFF PROSJEKT AS | 917687951 | ÅS |
| PROFF-RØR AS | 885300162 | VERDAL |
| PROFF RØRLEGGER AS | 911640228 | LILLESTRØM |
| PROFF RØR-SERVICE AS | 931830066 | NORDRE FOLLO |
| PROFF RØRSERVICE AS | 920045685 | OSLO |
| PROFF SNEKKERSERVICE AS | 930347698 | OSLO |
| PROFFTAK TRØNDELAG AS | 921524757 | TRONDHEIM |
| PROFF-VVS HUSSEIN | 931096737 | ASKER |
| PROFF ZAK AS | 830542752 | LILLESTRØM |
| PROFIL BYGG AS | 918187766 | PORSGRUNN |
| PROFILBYGG TRONDHEIM AS | 990058377 | TRONDHEIM |
| PROFIL-FASADE AS | 939698868 | MELHUS |
| PROFIL MONTASJE AS | 992506660 | PORSGRUNN |
| PROFILTEAM AS | 938184275 | HAMAR |