treehugger reports: [edited]
TATA, which famously brought a $2500 car to India, is now is taking orders for a 215 square foot house for 32,000 rupees ($720). That's $3.34 per square foot.
The kit includes doors, windows and roof, and is made of coconut or jute fibre, and can be assembled in a week. It also comes in a 30 square-metre model, which I believe is the plan shown above. It comes with an optional veranda and solar energy system.