Speed of construction/faster return on investment. Modular construction allows for the building and the site work to be performed concurrently. According to some substances, this can decrease the overall completion schedule by as much as 50%. This reduces labour, financing and supervision costs. To save even more time and money, nearly all design and engineering areas are a part of the production process. During site-built construction, walls cannot be placed until flooring are set up, and ceilings and rafters can't be added till walls are erected. On the flip side, with modular construction, walls, floors, ceilings, and rafters are all built at the same time, and then brought together in the exact same mill to form a building. This procedure can enable modular construction times of half that of traditional, stick-built structure.
Quality. Combining traditional building techniques, quality manufacturing and third-party agencies who offer arbitrary inspections, testing, and certification services for quality management, commercial modular structures are made in strict compliance with appropriate local, state, and national rules and regulations. On account of the requirement to transport modules to the last website, each module must be built to independently withstand travel and setup requirements. Thus the final module-to-module assembly of independently durable elements can yield a final product that is stronger than site-built constructions. Modular buildings frequently utilize Structural Insulated Panels (SIPs) in construction, which offer a range of advantages over traditional construction materials. They also offer exceptional moist and cold resistance when compared to timber and other materials, and are resistant to both compression decreasing and cold bridging.  Modular units may also be designed to fit in with external aesthetics of any present construction and modular units once constructed can be almost indistinguishable from a site-built structure.
Environmentally friendly construction process. The controlled environment of the factory allows for more precise structure while allowing the extra stuff to be recycled in house. 
Modular buildings are argued to have advantages over traditional buildings, for a variety of reasons.
Indoor construction. Construction is independent of weather, which may increase work efficiency and avoids damaged construction material.
Ability to service remote locations. Especially in countries where prospective markets might be located far from industrial facilities, such as Australia, there may be a lot higher costs to construct a in-house property in a distant area or a place experiencing a building boom like mining cities. Modular buildings are also beneficial in providing medical and sanitary facilities at which time, space, and money are a problem.
Flexibility. An individual can continually add to your modular construction, including creating high rises. When the demands change, 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 building to fit the new demand. Essentially, the entire building can be recycled in some instances.
Low waste. With the same programs being constantly built, the manufacturer has records of precisely what quantity of substances are necessary for a given job. With the consistency, builders can design systems which use common lengths of lumber, 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 house creates much less waste. According to the UK group WRAPup to a 90% reduction in materials can be accomplished through the use of modular structure. Materials minimized contain: timber pallets, shrink wrap, cardboard, plasterboard, timber, concrete, bricks, and cement.
Modular construction can also provide an advantage in similar classes in the International Green Construction Code.
Improved Air Quality - Many of the indoor air quality problems identified in new construction result from high moisture levels in the farming materials. Since the modular construction is substantially finished in a factory-controlled setting utilizing dry materials, the potential for high levels of moisture being trapped in the new construction is eliminated.