Environmentally friendly construction procedure. Modular construction reduces waste and site disturbance in contrast to site-built structures. The controlled environment of the factory allows for more accurate construction when permitting the additional stuff to be recycled in-house. 
Speed of construction/faster return on investment. Modular construction permits for the construction and the site work to be completed concurrently. According to some substances, this can decrease the overall completion schedule by as much as 50%. This also reduces labor, financing and oversight expenses. To save even more time and money, the majority of engineering and design areas are a part of the manufacturing procedure. Also unique to modular structure is the capacity to simultaneously construct a building's floors, walls, ceilings, rafters, and roofs. During site-built structure, walls cannot be set until floors are set up, and ceilings and rafters can't be added until walls have been erected. On the other hand, with modular construction, walls, flooring, ceilings, and rafters are all built at the same time, then brought together in the exact same factory to form a building. This process can allow modular construction times of half an conventional, stick-built structure.
Flexibility. An individual can add to a modular construction, such as producing high rises. When the demands alter, modular buildings may be disassembled and the modules relocated or refurbished for their next use reducing the demand for raw materials and minimizing the amount of energy expended to make a building to fit the new need. Essentially, the whole construction can be recycled in some instances.
Indoor construction. Assembly is independent of weather, which may increase work efficiency and avoids damaged building material.
Low waste. With the same plans being constantly built, the producer has records of precisely what quantity of materials are needed for a given job. Together with the consistency, most builders can design systems which use common lengths of timber, wallboard, etc., cut things with maximum efficiency, or be able to order special spans in bulk. While waste from a site-built residence may generally fill several big dumpsters, building of a modular dwelling generates much less waste. As stated by the UK group WRAP, up to a 90% decrease in substances can be achieved through using modular construction.
Quality. Mixing traditional construction methods, quality manufacturing and third-party agencies that provide random inspections, testing, and certification services for quality control, commercial modular buildings are made in strict compliance with appropriate local, state, and national rules and regulations. On account of the requirement to transport modules to the final website, each module must be built to independently withstand traveling and setup prerequisites. Thus the final module-to-module meeting of independently durable elements can yield a last product that is more durable than site-built structures. They also offer superior damp and cold immunity when compared to timber and other substances, and are resistant to both compression decreasing and cold bridging.  Modular units might also be made to match in with external aesthetics of any present building and modular units once assembled can be almost indistinguishable from a site-built structure.
Ability to support remote locations. Especially in countries in which potential markets might be found far from industrial centers, such as Australia, there may be a lot higher prices to build a in-house property in a distant area or an area experiencing a construction boom like mining cities. Modular buildings are also beneficial in providing medical and sanitary facilities at which space, time, and funds are a problem.
Modular buildings are argued to have benefits over conventional buildings, for many different factors.
Modular construction may also give an advantage in similar categories in the International Green Construction Code.
Improved Air Quality - A lot of the indoor air quality problems identified in new structure result from elevated humidity levels from the framing materials. Because the modular structure is substantially completed in a factory-controlled setting using abrasive materials, the potential for high levels of moisture being trapped in the new structure is eliminated.