Indoor construction. Assembly is independent of weather, which can increase work efficiency and averts damaged construction material.
Modular buildings have been argued to have benefits over conventional buildings, for a variety of reasons.
Modular buildings can also contribute to LEED requirements in almost any category site-built construction may, and may even provide an advantage in the areas of Sustainable websites, Energy and Atmosphere, Materials and Resources, and Indoor Environmental Quality. Modular construction can also give an edge in similar classes from the International Green Construction Code.
Low waste. With the very same programs being constantly built, the producer has records of precisely what quantity of substances are necessary for a specified job. With the consistency, most builders can design systems that use common lengths of lumber, wallboard, etc.. cut things with maximum efficiency, or have the ability to order special lengths in bulk. While squander from a site-built residence may generally fill several large dumpsters, building of a modular dwelling generates much less waste. According to the UK group WRAPup to a 90% reduction in materials can be achieved via using modular construction.
Improved Air Quality - A lot of the indoor air quality issues identified in new construction result from high humidity levels from the farming materials. Because the modular construction is substantially finished in a factory-controlled setting using dry materials, the prospect of elevated levels of moisture being trapped in the new construction is eliminated.
Quality. Mixing traditional construction techniques, quality manufacturing and third party agencies who offer arbitrary inspections, testing, and certification solutions for quality management, commercial modular structures are built in strict compliance with appropriate local, state, and federal rules and regulations. On account of the need to transport modules to the last website, each module has to be built to independently withstand traveling and setup requirements. Thus the closing module-to-module meeting of independently durable elements can yield a last product which is more durable than site-built constructions. They're air-tight, and as such provide excellent thermal performance. They also offer exceptional moist and cold resistance when compared to wood and other substances, and are resistant to both compression decreasing and cold bridging.  Modular units may also be designed to match in with outside aesthetics of any existing building and modular units once assembled can be virtually indistinguishable from a site-built construction.
Ability to support remote locations. Especially in countries in which potential markets might be found far from industrial centers, such as Australia, there can be much higher costs to construct a site-built house in a remote area or an area experiencing a construction boom like mining cities. Modular buildings can also be beneficial in providing medical and sanitary facilities at which time, space, and funds are a problem.
Environmentally friendly building procedure. The controlled environment of the factory allows for more accurate construction while permitting the extra materials to be recycled in house. 
Modular construction allows for the construction and the site work to be completed simultaneously. According to some materials, this can reduce the overall completion schedule by as much as 50%. This reduces labor, financing and supervision expenses. To save time and money, the majority of design and engineering areas are a part of the manufacturing process. Also unique to modular construction is the capacity to simultaneously construct a building's floors, ceilings, walls, rafters, and roofs. During site-built construction, walls can't be set until floors are in position, and ceilings and rafters can't be added until walls are erected. On the flip side, with modular construction, walls, floors, ceilings, and rafters are all built at the same time, and then brought together in the same mill to form a building. This procedure can allow modular construction times of half that of conventional, stick-built construction.
Flexibility. One can add to your modular building, such as producing high rises. When the needs change, modular buildings may be disassembled and the modules relocated or refurbished to their next usage reducing the requirement for raw materials and minimizing the total amount of energy expended to make a construction to fit the new need. In essence, the whole building could be recycled in some instances.