Permanent modular buildings are designed to meet or exceed the same building codes and standards as site-built structures and the same architect-specified materials used in conventionally built buildings are traditionally employed in modular construction projects. PMC may have as many stories as construction codes allow. Unlike relocatable buildings, PMC structures are intended to stay in one place for the whole period of their life.
Modular buildings might be used for long-term, temporary or permanent facilities, such as construction crews, universities and schools, military and civilian housing, and industrial facilities. Modular buildings are used in rural and remote regions where conventional construction may not be possible or reasonable, for instance, the Halley VI accommodation pods used for a BAS Antarctic trip.  Other applications have included churches, health care facilities, retail and sales offices, quick food restaurants and cruise boat construction. They may also be utilised in regions that have weather concerns, like hurricanes.
Building is offsite, using lean production techniques to prefabricate single or multi-story buildings in deliverable module sections. Permanent Modular Construction (PMC) buildings are manufactured in a controlled environment and can be constructed of wood, steel, or concrete. Modular components are generally constructed inside on assembly lines. Modules' structure may take as little as ten times but more often one to three months.
Modular buildings, also called prefabricated homes or precision built homes, are built to equal or higher standards as onsite stick-built houses. The building method is known as permanent modular structure.
Material for stick built and modular houses will be the same. First, modular houses don't have axles or a metal frame, meaning they are typically hauled on flat-bed trucks. Modular buildings have to conform to all applicable regional building codes, whereas doublewides and mobile homes have metal beneath framing. Doublewides and mobile houses made in the USA need to conform to national codes governed by U.S. Department of Housing and Urban Development.
The entire procedure of modular construction puts significance on the design stage. It's crucial that there's enough allowance at the design to enable the assembly to take up any"slack" or misalignment of elements. This is quite unlike onsite construction in which the tradesman can often make the part to match any specific installation.
The buildings are 60 percent to 90% completed offsite in a factory-controlled surroundings, and transported and assembled at the final construction site. This can comprise the entire construction or be components or subassemblies of larger structures. In many cases, modular builders operate with conventional general contractors to exploit the resources and advantages of each form of construction. Finished modules are hauled to the building site and constructed by a crane. Placement of the modules may take from several hours to several days.
Modular buildings and modular houses are prefabricated houses or buildings that consist of recurrent sections called modules. "Modular" is a building method that involves constructing sections from the construction site, then sending them to the intended website. Setup of the prefabricated sections is finished on site. Prefabricated sections are occasionally placed using a crane. The modules can be placed side-by-side, end-to-end, or stacked, allowing a variety of configurations and styles.