Gartenhäuser aus Holz https://www.pineca.de/gartenhauser/
A summer house is a single-storey house that only takes up a small portion of your yard, but can be used as a playroom for your kids, a home cinema, a garden shed, or even a gym. Description from pinterest.com. I searched for this on bing.com/images
Extend the deck out to create more entertaining space. Is this the house from heavy rain?
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Sunken Living Room Design, Pictures, Remodel, Decor and Ideas - page 9