Low waste. With the very same plans being constantly built, the producer has records of precisely what quantity of materials are necessary for a specified job. With the consistency, builders can design systems which use common lengths of timber, wallboard, etc., cut things with maximum efficiency, or be able to order special spans in bulk. While waste from a site-built dwelling may typically fill several large dumpsters, building of a modular dwelling generates much less waste. According to the UK group WRAPup to a 90% reduction in substances can be achieved via the use of modular structure.
Modular buildings can also contribute to LEED conditions in almost any kind site-built structure can, and may even provide an advantage in the fields of Sustainable websites, Energy and Atmosphere, Materials and Resources, and Indoor Environmental Quality. Modular construction can also provide an edge in similar categories in the International Green Construction Code.
Environmentally friendly building process. The controlled environment of the mill allows for more precise structure while allowing the additional stuff to be recycled in-house. 
Quality. Mixing traditional construction techniques, quality manufacturing and third-party agencies that provide arbitrary inspections, testing, and certification solutions for quality control, commercial modular buildings are made in strict accordance with appropriate local, state, and federal rules and regulations. On account of the need to transport modules to the last website, each module must be constructed to independently withstand traveling and installation requirements. Thus the final module-to-module assembly of independently durable elements can yield a last product that is stronger than site-built constructions. Modular buildings frequently use Structural Insulated Panels (SIPs) in construction, which provide a range of advantages over traditional construction materials. SIPs panels are a light yet durable mix of board and closed-cell polyurethane (PU) or expanded polystyrene (EPS) insulating foam. They're air-tight, and as such provide exceptional thermal performance. They also provide superior damp and cold immunity when compared to timber and other materials, and are immune to both compression shrinking and cold bridging.  Modular units might also be designed to match in with external aesthetics of any present building and modular units once constructed can be almost indistinguishable from a site-built structure.
Ability to support remote locations. Especially in countries in which prospective markets might be located far from industrial centers, such as Australia, there can be a lot higher prices to build a site-built house in a distant area or an area experiencing a building boom like mining cities. Modular buildings can also be beneficial in providing sanitary and medical facilities at which time, space, and money are a problem.
Modular construction allows for the construction and the site work to be performed simultaneously. According to some substances, this can decrease the total completion schedule by up to 50%. This reduces labour, financing and oversight expenses. To save time and money, nearly all design and engineering areas are a part of the manufacturing 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 other hand, with modular structure, walls, flooring, ceilings, and rafters are all built at precisely the exact same time, then brought together at precisely the same factory to form a building. This procedure can allow modular construction times of half that of traditional, stick-built construction.
Improved Air Quality - A lot of the indoor air quality problems identified in new construction result from high humidity levels from the farming materials. Because the modular structure is substantially finished in a factory-controlled setting utilizing dry materials, the prospect of elevated levels of moisture being trapped in the new structure is eliminated.
Modular buildings have been argued to have advantages over traditional buildings, for many different reasons.
Flexibility. One can continually add to a modular construction, including creating high rises. When the needs change, modular buildings may be disassembled and the modules emptied or refurbished to their next use reducing the demand for raw materials and minimizing the amount of energy expended to make a building to meet the new demand. Essentially, the whole building could be recycled in some instances.
Indoor construction. Assembly is independent of weather, which can increase work efficiency and averts damaged construction material.