When a home simply needs more space, there are a number of novel solutions that can provide the required square footage. But few are as fantastically elegant as this one from German architects Christ Christ.

Known as House S, the home in Wiesbaden began its life as a small bungalow. A redesign saw a second story added, along with three rooftop gardens and an outdoor rooftop movie theater.

The cantilevered roof sits between the first and second stories. On the first floor, the interior partitions were mostly removed to make the space into an open floor plan with interconnected living and kitchen areas. Children’s rooms and a bathroom are also located on this level.

Upstairs, the master bedroom occupies one of the boxy additions while a second living area and an office occupy the other boxes. A glass corridor joins the three parts of the upstairs addition and separates the distinct outdoor areas.

The lowest level of the home contains a separate apartment and a guest room. The architects used energy-efficient building materials to be sure that the newly renovated home was as energy-efficient as possible.

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Overall, the renovated home stays true to its origins as a project of interior architect Wilfried Hilger. But the additions and the changes have added a new layer of character to this charming and functional home.