La Petite Maison de Weekend by Canadian studio Patkau Architects, is a very compact sustainable cottage for two. It provide the basics for everyday life: sleeping loft, deep storage wall, kitchen, shower, and composting toilet.

Built from recyclable materials, the dwelling generates its own electricity (photovoltaic cells on the roof convert solar energy into electricity9, collects and distributes rainwater, and composts human waste using only the natural dynamics of the site.