Villa Nyberg by Göteborg firm Kjellgren Kaminsky Architecture is a 156 square metre home situated by a lake in a fir forest in Borlänge, central Sweden.

The living room and kitchen open up towards the views of the lake, the more private areas such as the bedrooms and bathrooms are situated on the other side of the house with smaller windows overlooking the forest.

The round shape of the villa eliminates cold bridges and reduces the enclosing wall area of the house. It also affects the way occupants live in the house; during the day one will move from room to room around the building experiencing different views and daylight conditions.

Pretty idyllic, but the house itself is also rather ideal when it comes to the environment, since Villa Nyberg is also a prefab 'passive' house. Passive houses are extremely well-insulated buildings that are largely heated by the energy already present in the building - it's easy to forget that people and household equipment generate a lot of energy.

KKA estimate that this villa will have an energy consumption for heating of only 25 kWh/m² per year.