Ability to service remote locations. Especially in countries in which prospective markets may be located far from industrial facilities, such as Australia, there can be a lot higher costs to construct a site-built house in a remote area or an area experiencing a construction boom like mining cities. Modular buildings can also be beneficial in providing sanitary and medical facilities at which space, time, and money are a problem.
Modular buildings have been argued to have benefits over conventional buildings, for a variety of reasons.
Environmentally friendly building process. The controlled environment of the mill allows for more accurate construction while allowing the additional materials to be recycled in house. 
Flexibility. One can add to a modular building, such as creating high rises. When the demands alter, modular buildings can be disassembled and the modules relocated or refurbished for their next usage reducing the demand for raw materials and minimizing the total amount of energy expended to create a construction to fit the new need. Essentially, the entire construction could be recycled in some instances.
Quality. Mixing traditional construction methods, quality manufacturing and third-party agencies who provide random inspections, testing, and certification solutions for quality control, commercial modular buildings are made in strict accordance with appropriate local, state, and national rules and regulations. Due to the need to transport modules to the final website, each module must be constructed to independently withstand travel and setup requirements. Thus the closing module-to-module assembly of independently durable elements can yield a final product that is more durable than site-built constructions. SIPs panels are a mild yet durable mix of board and closed-cell polyurethane (PU) or expanded polystyrene (EPS) insulation. They also offer superior damp 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 match in with outside aesthetics of any existing construction and modular units after constructed can be almost indistinguishable from a site-built structure.
Modular buildings may also contribute to LEED conditions in any kind site-built structure may, and may even supply an edge in the fields of Sustainable websites, Energy and Atmosphere, Materials and Resources, and Indoor Environmental Quality. Modular construction can also give an advantage in similar categories from the International Green Construction Code.
Low waste. With the same plans being constantly built, the producer has records of exactly what amount of substances are necessary for a specified job. With the consistency, builders can design systems which use common lengths of timber, wallboard, etc.. cut things with maximum efficiency, or be able to order special lengths in bulk. While squander from a site-built residence may generally fill several large dumpsters, construction of a modular house creates much less waste. As stated by the UK group WRAPup to a 90% decrease in substances can be achieved via using modular construction.
Indoor construction. Construction is different from weather, which may boost work efficiency and avoids damaged construction material.
Improved Air Quality - Many of the indoor air quality problems identified in new construction result from high moisture levels in the farming materials. Because the modular construction is substantially completed in a factory-controlled setting using abrasive materials, the potential for elevated levels of moisture being trapped inside the new structure is removed.
Speed of construction/faster return on investment. Modular construction allows for the building and the site work to be performed simultaneously. According to some substances, this can decrease the overall completion schedule by as much as 50%. This reduces labor, financing and oversight costs. To save time and money, nearly all design and engineering areas are a part of the production process. Also unique to modular construction is the capacity to simultaneously construct a building's floors, walls, ceilings, rafters, and roofs. During site-built construction, walls cannot be set until floors are in position, and ceilings and rafters cannot be added till walls have been erected. On the flip side, with modular structure, walls, floors, ceilings, and rafters are all built at precisely the exact same time, and then brought together at the exact same factory to form a construction. This procedure can enable modular construction times of half that of traditional, stick-built structure.