A single family solar house has been built in Budapest. It was designed for reducing energy consumption by the application of a hybrid solar system. The 24 m2collector array of the active subsystem is combined with conventional energy sources and covers the heat demand of domestic hot water (DHW) and space heating. The collector array provides shading of the sunspace in the summer. The passive solar subsystem comprises a greenhouse, a sunspace, a seasonally movable third glazing, protective vegetation, high thermal insulation, an earth bank, solar conscious orientation of windows and heat buffer zones.