Sonja Henie actively travelled to various retailers in her search for the perfect textiles and colours. Among others, she selected a deep red carpet from California. The colour can still be seen today on the original curtains and was used in both stairwells, in the trophy room, the auditorium and on upholstery.

Henie and Onstad also commissioned one of Norway's most current prominent furniture designers, Sven Ivar Dysthe, to design a range of furniture for HOK. As a recent graduate from London, Dysthe eagerly dove into the task. He designed the Prisma series, which comprised tables, lounge chairs and ottomans produced by the Møre Lenestol Factory AS. He also designed the legendary Popcorn Chair in fiberglass and steel pipes, a chair that has since become an iconic collectors item. This furniture was produced exclusively for HOK. It was only in 2012 that the Popcorn Chair was relaunched for retail, and the remaining Prisma furniture pieces were reproduced starting in 2013. Since 2014, all of the originally designed Prisma furniture is to be found once again among areas of HOK, in keeping with the restoration project.