Green homemade houseboat - Hull / Body is katamaran style

This houseboat are often seen out on the lake Mälaren, Västerås, Sweden (in the summer). This is a katamaran hull. So I think it goes quite fast. However I don´t think anyone lives on it fulltime.

Foto: Pher G Ågren

I don´t know the name of this houseboat. If you have any information, please email me. =)