In the Austrian town of Hörbranz overlooking the Constance Lake, a single family house from the 60s set the starting point for the K³ House. Austrian architects Matthias Hein and Juri Troy founders of Hein-Troy Architekten conducted this project for two young families to realise their dream of having their own homes on the top of their parents’ house.


About the project :
To keep the garden area, the architects designed two overhanging wooden structures each for one of the clients reaching up to 5 meters and looking over the Constance Lake to the West. The concept was generated to get two completely different flats – a maisonette and a loft – each with private outdoor spaces and same living qualities so that the twins could easily choose their personal flat.



The vertical flat uses a split level to create a high living room with a kitchen on the next level, like the command bridge of a ship as the central element. The horizontal flat offers a number of rooms connected by floating facilities and multiple opportunities to live on a single level. The large loggia offers the best view and a protected exterior living room.






The parents stayed in there flat on the ground floor during the 12 months of construction. Their house was therefore completely isolated, got new windows and a wooden cover and became integrated in the new concept of a 3-families house with a lot of social advantages such as a recreational room with a garden terrace, space for their bicycles, a lot of storage in the basement and even two guestrooms that they can share all together.
The structure was completely pre-manufactured an set up in just two days.
All photos © Studio 22
+ Via Hein-Troy Architekten







We need more clients with this kind of courage. Nice work, perfectly done. Great Architecture.
beau et calme. Assez différent du pavillon originel, on va dire…