A thought experiment conceptualizing 320 ft² of house on 80 ft² of land. One room per floor with a sheltered rooftop deck. Imagine a village of TallHaus towers with exemplary views and small carbon footprint.   
Floor Area: 320 ft² + 80 ft² rooftop deck
Features: 1st floor: entry & living / 2nd floor: kitchen & eating / 3rd floor: bathroom / 4th floor: bedroom / 5th floor: rooftop deck
Date: Design 2012