Modular buildings and modular homes are sectional prefabricated buildings, or houses, that consist of multiple sections called modules. "Modular" is a method of construction differing from other methods of building. The module sections are constructed at an off site (sometimes, remote) facility, then delivered to the intended site of use. Complete construction of the prefabricated sections are completed on site. The prefabricated sections are sometimes lifted and placed on basement walls using a crane, the module prefabricated sections are set onto the building's foundation and joined together to make a single building. The modules can be placed side-by-side, end-to-end, or stacked, allowing a wide variety of configurations and styles in the building layout.
Modular buildings, also called prefabricated homes or precision built homes, are built to the same or higher building standards as on-site stick-built homes. The building method is referred to as permanent modular construction. Modular homes are built the same and considered the same as a stick built home. Material for stick built and modular homes are the same. Modular homes are not doublewides or mobile homes. First, modular homes do not have axles or a metal frame, meaning that they are typically transported to their site by means of flat-bed trucks. Secondly, modular buildings must conform to all local building codes for their proposed use, while doublewides and mobile homes have metal under framing. Doublewides and mobile homes made in the United States, are required to conform to federal codes governed by HUD (U.S. Department of Housing and Urban Development).
Modular buildings may be used for long-term, temporary or permanent facilities, such as construction camps, schools and classrooms, civilian and military housing, and industrial facilities. Modular buildings are used in remote and rural areas where conventional construction may not be reasonable or possible, for example, the Halley VI accommodation pods used for a BAS Antarctic expedition. Other uses have included churches, health care facilities, sales and retail offices, fast food restaurants and cruise ship construction. They can also be used in areas that have weather concerns, such as hurricanes.