After taking down all the walls, he created intimacy in the bedroom with a library and a sleeping space for his children with a set of transformer sofas.Because his kitchen counter was not big, he made it deeper, creating vertical instead of horizontal space, and the bathroom cabinet was inserted in the wall of the restroom.
Although the video is in Portuguese, the tricks are worth a look.
More Small Spaces
Minimalist Design Makes a Full Bedroom Under the Stairs
Smart Kitchen Space-Saver: Dish Drying Closet Above The Sink
Wooden 450 Sq Feet Sustainable Home Has Great Use Of Space, Sweet Details In Buenos Aires