Sustainable energy efficient family house in Zdiby. A timber house, energetically very close to the passive house standard, employing natural materials, but mainly trying to be as simple and rational as possible. The concept was based on a composition of simple volumes arranged into a compact and clear shape. The house opens to the south with a terrace directly extending from the living room and connected with it thanks to the extensive glazing of the south wall shaded by means of a wooden brise-soleil. The north side of the house is more compact. The structure of the house consists two-by-four timber framing, with all constructions open to water vapor diffusion. All glazing is made of insulated triple window panes. Heating - a simple small electric boiler and low temperature floor heating on the ground floor, simple radiators on the first floor in combination with air heat recovery system. Water is heated using the thermosolar collectors and an integrated heat storage tank.