Improved Air Quality - A lot of the indoor air quality issues identified in new structure result from high humidity levels from the framing materials. Since the modular structure is substantially finished in a factory-controlled setting using abrasive materials, the potential for high levels of moisture being trapped in the new construction is removed.
Modular construction can also give an advantage in similar classes from the International Green Construction Code.
Quality. Mixing traditional construction methods, quality manufacturing and third party agencies that provide random inspections, testing, and certification solutions for quality management, 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 site, each module has to 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 which is more durable than site-built constructions. Modular buildings frequently utilize Structural Insulated Panels (SIPs) in construction, which provide a range of advantages over traditional construction materials. SIPs panels are a mild yet durable combination of board and either closed-cell polyurethane (PU) or expanded polystyrene (EPS) insulating foam. They also provide superior damp and cold immunity when compared to wood and other substances, and are immune to both compression decreasing and cold bridging.  Modular units might also be made to fit in with external aesthetics of any existing construction and modular units after constructed can be almost indistinguishable from a site-built structure.
Low waste. With the same programs being continuously built, the manufacturer has records of exactly what quantity of materials are needed for a specified job. Together with the consistency, builders can design systems that use common lengths of timber, wallboard, etc., cut items with maximum efficiency, or have the ability to order special spans in bulk. While squander from a site-built residence may generally fill several big dumpsters, construction of a modular dwelling generates much less waste. According to the UK group WRAPup to a 90% decrease in substances can be achieved through the use of modular construction.
Flexibility. An individual can continually add to your modular building, including creating high rises. When the demands change, modular buildings may 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 meet the new demand. In essence, the whole building can be recycled in some instances.
Modular buildings have been argued to have advantages over conventional buildings, for a variety of factors.
Environmentally friendly construction process. Modular construction reduces waste and site disturbance compared to site-built structures. The controlled environment of the mill allows for more accurate construction when permitting the additional materials to be recycled in-house. 
Indoor construction. Construction is different from weather, which may increase work efficiency and averts damaged building material.
Ability to support remote locations. Particularly in countries where potential markets may be found far from industrial facilities, such as Australia, there may be much higher prices to construct a site-built house in a remote area or a place experiencing a building boom such as mining towns. Modular buildings can also be beneficial in providing medical and sanitary facilities where time, space, and funds are a problem.
Speed of construction/faster return on investment. Modular construction allows for the construction and the site work to be completed concurrently. According to some materials, this can decrease the total completion schedule by as much as 50%. This reduces labor, financing and supervision costs. To save even more time and money, the majority of design and engineering areas are part of the manufacturing process. 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 placed until flooring are set up, and ceilings and rafters can't be added until walls are erected. On the other hand, with modular structure, walls, floors, ceilings, and rafters are all constructed at precisely the exact same time, then brought together in the exact same factory to form a construction. This process can allow modular construction times of half an conventional, stick-built construction.