In early villages, houses were built close together so that help would be near in the case of an attack. An isolated house would be an easy target for roaming bands of Native American tribes. By building homes close together, the colonists were able to keep watch on the neighborhood and see when something was amiss.
About 1.5m per year, however, this has declined due the economy. http://understandingthemarket.com/?p=18 In 2005 1.6 million housing units where built. This includes single and multifamily units. In 2010 around 330,000 housing units where built. That is a decline of more than 300%. This is why it will take years before the housing market will be back to contribute to economical growth.
People lived in pit houses in various cultures and regions around the world, including Native American tribes in the southwestern United States and indigenous peoples in Japan. These houses were built partially underground, providing insulation and protection from the elements.
Sod houses are built by stacking layers of sod (grass and soil) to form walls, typically in a rectangular shape. The roof is usually made of wooden beams covered with more sod. These houses blend into the surrounding landscape and provide good insulation, but may require upkeep to prevent water damage.
Suburbs generally were developed all at once with all the houses built by a single builder or company. Unlike the urban core which evolved over time, with houses built by different builders. As a result, all the houses in a suburban area are similar in age, size and cost. This resulted in people of the same economic background living together in these neighborhoods. And while these neighborhoods were (and still are not) diverse, it was often as much about Economics as it was about racism. Certainly many suburbs, particularly between 1950 and 1970, were developed outside of the central city around new schools for white homeowners that were fleeing the integration of established schools. But just because someone moved out of neighborhood with an integrated school to a suburban one with no diversity does not mean it was motivated by racism. Without doubt, many people moved to get away from diversity, but many moved to give the best opportunity to their children as well.
The Mogollon culture, active from around 200 CE to 1450 CE in the American Southwest, is known for their distinctive pottery, agriculture, and complex social organization. They built cliff dwellings and pit houses, and some sites feature rock art. The Mogollon people were skilled farmers, cultivating corn, beans, and squash.
Because they are low-order goods and services
One of the main reason the houses were built close together in early villages was for protection in case of attack. The homeowners looked out for one another.
in case of attack
protect residents in case of attact
So they could protect each other easily by getting there faster
New England's towns and villages were very close together at first. The houses were built so that the people could protect each other. There was usually a group of houses and then a group of shops like a bakery, blacksmith, and general store.
Actually the earliest villages usually had anywhere from 150 to 200 villagers. They built there houses close together to protect from wind and competing villages from attacking. 150 to 200 A+ students
They built their houses out of natural wood. They painted faces.
in case of an attack
because not enough houses were built and the population is increasing rapidly.
Inuits built it because they lived in igloos
Haudenosaunee villages are usually built upon plains.