Modular buildings have been argued to have benefits over conventional buildings, for a variety of factors.
Ability to service remote locations. Especially in countries where prospective markets might be found far from industrial facilities, such as Australia, there may be much higher costs to construct a site-built house in a distant area or an area experiencing a construction boom like mining cities. Modular buildings can also be beneficial in providing sanitary and medical facilities where space, time, and money are a problem.
Quality. Combining traditional building techniques, quality manufacturing and third party agencies who provide arbitrary inspections, testing, and certification solutions for quality control, commercial modular structures are made in strict accordance with appropriate local, state, and federal regulations and codes. On account of the need to transport modules to the last website, each module has to be built to independently withstand travel and installation requirements. Thus the closing module-to-module meeting of independently durable components can yield a final product which is more durable than site-built constructions. Modular buildings often use Structural Insulated Panels (SIPs) in construction, which provide a range of benefits over traditional construction materials. SIPs panels are a mild yet lasting mix of panel board and either closed-cell polyurethane (PU) or expanded polystyrene (EPS) insulation. They are air-tight, and as such provide excellent thermal performance. They also offer superior moist and cold immunity when compared to wood and other materials, and are resistant to both compression shrinking and cold bridging.  Modular units may also be made to fit in with outside aesthetics of any present building and modular units once assembled can be virtually indistinguishable from a site-built structure.
Improved Air Quality - Many of the indoor air quality problems identified in new construction result from elevated humidity levels from the framing materials. Since the modular construction is substantially completed in a factory-controlled setting using dry materials, the prospect of elevated levels of moisture being trapped inside the new structure is removed.
Flexibility. An individual can continually add to your modular building, including creating high rises. When the demands alter, modular buildings can be disassembled and the modules relocated or refurbished for their next usage reducing the requirement for raw materials and minimizing the total amount of energy expended to make a construction to meet the new demand. In essence, the whole construction can be recycled in some instances.
Low waste. With the very same plans being constantly built, the producer has records of exactly what amount of substances are needed for a specified job. Together with the consistency, most builders can design systems which use common lengths of timber, wallboard, etc.. cut items with maximum efficacy, or have the ability to order exceptional spans in bulk. While waste from a site-built residence may generally fill several big dumpsters, construction of a modular dwelling generates much less waste. As stated by the UK group WRAPup to a 90% decrease in substances can be achieved through using modular structure.
Modular construction may also give an advantage in similar categories from the International Green Construction Code.
Modular construction permits for the construction and the site work to be performed simultaneously. According to some materials, this can reduce the overall completion schedule by as much as 50%. This also reduces labour, financing and oversight expenses. To save time and money, the majority of engineering and design areas are part of the production process. Also unique to modular structure is the ability to simultaneously construct a building's floors, walls, ceilings, rafters, and roofs. During site-built construction, walls cannot be set until floors are set up, and ceilings and rafters cannot be added until walls are erected. On the flip side, with modular construction, walls, flooring, ceilings, and rafters are all built at the exact same time, then brought together at precisely the same mill to form a construction. This procedure can allow modular building times of half that of traditional, stick-built structure.
Environmentally friendly building process. The controlled environment of the mill allows for more precise structure while allowing the extra materials to be recycled in-house. 
Indoor construction. Assembly is different from weather, which can increase work efficiency and averts damaged construction material.