Quality. Mixing traditional construction methods, quality manufacturing and third-party agencies who offer random inspections, testing, and certification solutions for quality control, commercial modular buildings are built in strict compliance with appropriate local, state, and federal rules and regulations. Due to the requirement 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 elements can yield a final product which is stronger than site-built constructions. SIPs panels are a mild yet lasting mix of board and either closed-cell polyurethane (PU) or expanded polystyrene (EPS) insulating foam. They are air-tight, and as such provide excellent thermal performance. They also offer superior moist and cold immunity when compared to timber and other materials, and are resistant to both compression decreasing and cold bridging.  Modular units may also be made to fit in with external aesthetics of any present building and modular units after assembled can be virtually indistinguishable from a site-built structure.
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 reduce the total completion schedule by up to 50%. This also reduces labor, financing and supervision costs. To save time and money, nearly all design and engineering areas are a part of the production procedure. During site-built construction, walls can't be placed until flooring are in position, and ceilings and rafters can't be added till walls have been erected. On the other hand, with modular construction, walls, flooring, ceilings, and rafters are all built at the exact same time, and then brought together in precisely the same mill to form a construction. This process can enable modular building times of half an conventional, 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 framing materials. Since the modular construction is substantially finished in a factory-controlled setting utilizing abrasive materials, the prospect of high levels of moisture being trapped inside the new construction is removed.
Low waste. With the very same programs being constantly built, the manufacturer has records of exactly what quantity of materials are needed for a given job. Together with the consistency, most builders can design systems that use common lengths of timber, wallboard, etc.. cut items with maximum efficacy, or be able to order exceptional lengths in bulk. While waste from a site-built dwelling may typically fill several big 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 through the use of modular construction. Materials minimized contain: wood pallets, shrink wrap, cardboard, plasterboard, wood, concrete, bricks, and cement.
Modular buildings have been argued to have advantages over conventional buildings, for a variety of reasons.
Modular buildings may likewise contribute to LEED conditions in any kind site-built construction can, and may 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 edge in similar categories in the International Green Construction Code.
Flexibility. One can continually add to a modular building, such as producing high rises. When the demands 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 total amount of energy expended to create a construction to fit the new need. In essence, the entire building could be recycled in some instances.
Ability to support remote locations. Especially in countries where prospective markets might be located far from industrial centers, such as Australia, there can be a lot higher prices to build a in-house property in a distant area or an area experiencing a construction boom like mining cities. Modular buildings can also be beneficial in providing sanitary and medical facilities where space, time, and money are a problem.
Environmentally friendly building process. The controlled environment of the factory allows for more precise structure when allowing the additional materials to be recycled in house. 
Indoor construction. Construction is different from weather, which can increase work efficiency and averts damaged building material.