What if housing behaved more like other consumer goods, competing for buyers not just through visual appeal but also metrics for performance criteria and word-of-mouth marketing? 100K Houses were conceived in response to the unsustainable and dated approach to American developer housing that values size above all else. ISA worked in close collaboration with developer Postgreen Homes to prototype a 1000 SF, efficient, super-green house model for construction at $100 per square foot. Seven homes have been built to-date, providing sustainable, affordable options for first-time Philadelphia homebuyers.