Low waste. With the very same programs being continuously built, the producer has records of precisely what amount of materials are necessary for a specified job. With the consistency, most builders can design systems which use common lengths of lumber, wallboard, etc., cut items with maximum efficiency, or be able to order special lengths 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 WRAPup to a 90% reduction in substances can be achieved via using modular structure. Materials minimized contain: timber pallets, shrink wrap, cardboard, plasterboard, timber, bricks, concrete, and cement.
Environmentally friendly construction procedure. Modular construction reduces waste and site disturbance compared to site-built structures. The controlled environment of the factory allows for more precise structure while allowing the extra stuff to be recycled in-house. 
Ability to support remote locations. Especially in countries where potential markets might be found far from industrial facilities, such as Australia, there may be a lot higher prices to construct a site-built house in a distant area or an area experiencing a building boom like mining towns. Modular buildings can also be beneficial in providing sanitary and medical facilities at which time, space, and money are an issue.
Flexibility. An individual can add to your modular construction, such as creating high rises. When the demands change, modular buildings can be disassembled and the modules relocated or refurbished to their next use reducing the requirement for raw materials and minimizing the amount of energy expended to make a construction to fit the new need. Essentially, the entire construction can be recycled in some cases.
Modular buildings have been argued to have advantages over traditional buildings, for a variety of factors.
Modular buildings can also contribute to LEED conditions in almost any category site-built construction can, and can even supply an advantage in the areas of Sustainable Sites, Energy and Atmosphere, Materials and Resources, and Indoor Environmental Quality. Modular construction may also provide an advantage in similar classes in the International Green Construction Code.
Speed of construction/faster return on investment. Modular construction permits 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, nearly all engineering and design disciplines are a part of the production process. During site-built construction, walls cannot be set until floors are in position, and ceilings and rafters can't be added till walls have been erected. On the other hand, with modular structure, walls, floors, ceilings, and rafters are all constructed at the same time, and then brought together at precisely the same factory to form a building. This procedure can enable modular construction times of half an traditional, stick-built construction.
Quality. Mixing traditional construction techniques, quality manufacturing and third-party agencies that offer random inspections, testing, and certification services for quality management, commercial modular buildings are made in strict compliance with appropriate local, state, and federal regulations and codes. Due to the need to transport modules to the last site, each module has to be built to independently withstand traveling and setup requirements. Thus the final module-to-module meeting of independently durable components can yield a final product that is more durable than site-built structures. Modular buildings frequently use Structural Insulated Panels (SIPs) in construction, which provide a range of benefits over traditional construction materials. SIPs panels are a mild yet durable combination of board and closed-cell polyurethane (PU) or expanded polystyrene (EPS) insulation. They also provide superior moist and cold resistance when compared to wood and other materials, and are immune to both compression decreasing and cold bridging.  Modular units may also be designed to fit in with external aesthetics of any existing construction and modular units after constructed can be virtually indistinguishable from a site-built construction.
Improved Air Quality - Many of the indoor air quality problems identified in new structure result from high moisture levels in the farming materials. Since the modular construction is substantially completed in a factory-controlled setting using abrasive materials, the prospect of elevated levels of moisture being trapped inside the new construction is eliminated.
Indoor construction. Assembly is different from weather, which can boost work efficiency and averts damaged construction material.