This proposal doesn't offer innovative or ground breaking solutions. It combines age-tested building methods to provide affordable, comfortable and self-sufficient housing for people without a proper shelter world wide.
The walls are made from adobe bricks molded to fit and eliminate the need for mortar. The bricks can be made from a variety of materials, proper to what each area has to provide; earth, clay, straw, rice, sticks, manure. They provide insulation from extreme heat or cold and can last for decades. They can be made from the owner without the need to purchase any materials. In earthquake-prone areas, the structure can be reinforced with steel bars for foundations and through the walls.
The shape of the bricks has been inspired from Inca architecture, where the civilization's monuments have stand for centuries in very active seismically areas.
The roof accommodates plants on a layer of soil over a layer of mortar which is used to collect the excessive rainwater in a tank. A green roof can keep excessive heat out of the residence and with the right selection of plants provide a small quantity of vegetables or grains for the people most in need.
The tank can filter the water and provide potable water to the residents. A small photovoltaic module can provide electricity to LED lights, cellphones and other devices.
The house can be build fast, repeatably, with local materials and have minimal impact on the surrounding environment. The owner can expand it according to his expanding needs, like a larger family or growing children.
All the building materials used are biodegradable and don't pollute the local environment with toxic substances or with non-biodegradable materials.