How is factory-built housing characterized?

Factory-built housing is primarily characterized by its construction in a controlled factory setting. This method involves assembling the various components of the housing in a manufacturing facility where conditions can be monitored for quality and efficiency. The process allows for greater consistency in construction quality, faster build times, and potentially lower costs compared to traditional on-site construction, which is subject to weather delays and the variability of local labor conditions.

The other options refer to different types of housing that do not highlight the defining feature of factory-built homes. Housing constructed on a construction site is typical of traditional building methods, and focusing on natural materials does not necessarily describe factory-built homes, as they can utilize a variety of construction materials. Additionally, housing designed for short-term occupancy does not accurately reflect the intent or design of factory-built homes, which can be used for long-term residency. The emphasis on construction within a factory setting distinguishes factory-built housing as a unique category in the housing market.