Flexibility. An individual can continually add to your modular building, including producing high rises. When the needs change, modular buildings can be disassembled and the modules emptied or refurbished to their next use reducing the demand for raw materials and minimizing the total amount of energy expended to create a building to meet the new demand. In essence, the entire building could be recycled in some instances.
Modular buildings have been argued to have benefits over traditional buildings, for a variety of reasons.
Modular construction can also give an edge in similar classes from the International Green Construction Code.
Speed of construction/faster return on investment. Modular construction permits 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 also reduces labour, financing and supervision expenses. To save time and money, nearly all design and engineering areas are part of the manufacturing procedure. Also unique to modular construction is the capacity to simultaneously construct a building's floors, walls, ceilings, rafters, and roofs. During site-built structure, walls can't be placed until flooring are in position, and ceilings and rafters cannot be added until walls are erected. On the flip side, with modular structure, walls, floors, ceilings, and rafters are all constructed at precisely the same time, and then brought together at precisely the same factory to form a construction. This procedure can allow modular building times of half that of conventional, stick-built construction.
Improved Air Quality - Many of the indoor air quality issues identified in new structure result from high moisture levels in the framing materials. Because the modular structure is substantially finished in a factory-controlled setting using dry materials, the potential for elevated levels of moisture being trapped inside the new construction is eliminated.
Low waste. With the very same programs being continuously built, the producer has records of exactly what amount of materials are necessary for a specified job. Together with the consistency, builders can design systems which use common lengths of lumber, wallboard, etc.. cut things with maximum efficacy, or be able to order exceptional spans in bulk. While squander from a site-built residence may generally fill several big dumpsters, construction of a modular house creates much less waste. As stated by the UK group WRAPup to a 90% reduction in substances can be achieved via using modular structure.
Environmentally friendly building 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 allowing the extra materials to be recycled in-house. 
Indoor construction. Construction is independent of weather, which can increase work efficiency and averts damaged building material.
Quality. Combining traditional building methods, quality manufacturing and third-party agencies who offer arbitrary inspections, testing, and certification solutions for quality control, commercial modular buildings are built in strict accordance with appropriate local, state, and federal rules and regulations. Due to the need to transport modules to the last site, each module must be built to independently withstand traveling and setup prerequisites. Thus the closing module-to-module assembly of independently durable elements can yield a final product that is more durable than site-built structures. SIPs panels are a mild yet durable combination of panel board and closed-cell polyurethane (PU) or expanded polystyrene (EPS) insulation. They also provide exceptional moist and cold immunity when compared to wood and other substances, and are resistant to both compression shrinking and cold bridging.  Modular units might also be made to fit in with outside aesthetics of any existing building and modular units after assembled can be almost indistinguishable from a site-built construction.
Ability to support remote locations. Particularly in countries in which prospective markets may be located far from industrial facilities, such as Australia, there can be much higher costs to build a site-built house in a distant area or an area experiencing a construction boom such as mining cities. Modular buildings are also beneficial in providing sanitary and medical facilities where time, space, and money are a problem.