Hanasaari was created as a consistent whole in the 1970s. Designed by Professor Yrjö Sotamaa, its interior was inspired by nature, art and Finnish design. The goal was to create an innovative and modern, yet intimate and warm environment. The forms were simple, but the materials – such as wood, granite and handmade fabrics – were warm and natural, as were the colours: Sotamaa used various shades of red, brown and orange. This was unusual in modernistic buildings at the time. The building was designed by architect Veikko Malmio.