BI Norwegian Business School offers housing for the majority of students at BSN Dormitory during the summer session
All rooms are furnished and have a wired internet connection. Kitchens are not fully equipped with cooking utensils, however BI International Office will provide summer students with basic pots, pans, utensils and cutlery. You can bring with you a cup and/or glass and a plate and/or bowl. These items can also be bought in Oslo.
For more details read here