Improved Air Quality - Many of the indoor air quality issues identified in new structure result from elevated humidity levels from the framing materials. Since the modular construction 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 removed.
Low waste. With the very same plans being constantly built, the manufacturer has records of exactly what amount of materials are needed for a given job. Together with the consistency, builders can design systems which use common lengths of lumber, wallboard, etc.. cut things with maximum efficiency, or have the ability to order special spans in bulk. While squander from a site-built dwelling may typically fill several large dumpsters, building of a modular dwelling generates much less waste. As stated by the UK group WRAPup to a 90% decrease in materials can be achieved via using modular structure.
Indoor construction. Construction is different from weather, which can increase work efficiency and avoids damaged construction material.
Modular buildings may likewise contribute to LEED requirements in almost any kind site-built structure can, and may even provide an advantage in the areas of Sustainable Sites, Energy and Atmosphere, Materials and Resources, and Indoor Environmental Quality. Modular construction can also provide an advantage in similar classes in the International Green Construction Code.
Ability to service remote locations. Especially in countries in which prospective markets might be found far from industrial centers, such as Australia, there can be a lot higher costs to construct a in-house property in a remote area or a place experiencing a construction boom like mining cities. Modular buildings can also be beneficial in providing sanitary and medical facilities at which 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 performed simultaneously. According to some materials, this can reduce the total completion schedule by as much as 50%. This reduces labor, financing and oversight costs. To save even more time and money, the majority of engineering and design disciplines are part of the production procedure. Also unique to modular structure is the capacity to simultaneously construct a building's floors, ceilings, walls, rafters, and roofs. During site-built construction, walls cannot be placed until flooring are set up, and ceilings and rafters cannot be added till walls have been erected. On the flip side, with modular construction, walls, floors, ceilings, and rafters are all constructed at the exact same time, then brought together in the same factory to form a building. This process can allow modular building times of half that of traditional, stick-built structure.
Modular buildings have been argued to have benefits over traditional buildings, for a variety of factors.
Flexibility. One can continually add to your modular building, such as creating high rises. When the demands change, modular buildings may be disassembled and the modules emptied or refurbished for their next use reducing the demand for raw materials and minimizing the amount of energy expended to create a building to meet the new demand. In essence, the entire construction could be recycled in some instances.
Environmentally friendly construction procedure. The controlled environment of the mill allows for more accurate construction while allowing the extra materials to be recycled in house. 
Quality. Mixing traditional construction methods, quality manufacturing and third party agencies that offer arbitrary inspections, testing, and certification services for quality control, commercial modular structures are built in strict compliance with appropriate local, state, and federal rules and regulations. Due to the need to transport modules to the last site, each module has to be built to independently withstand travel and installation prerequisites. Thus the final module-to-module meeting of independently durable components can yield a last product which is stronger than site-built structures. Modular buildings often use Structural Insulated Panels (SIPs) in construction, which offer a range of benefits over traditional construction materials. They also provide superior moist and cold resistance when compared to timber and other materials, and are immune to both compression decreasing and cold bridging.  Modular units may also be made to match in with external aesthetics of any existing building and modular units after constructed can be virtually indistinguishable from a site-built construction.