Modular buildings may likewise contribute to LEED requirements in almost any kind site-built construction can, and can even supply an edge in the areas of Sustainable websites, Energy and Atmosphere, Materials and Resources, and Indoor Environmental Quality. Modular construction may also provide an edge in similar classes from the International Green Construction Code.
Flexibility. One can continually add to your modular building, including producing high rises. When the needs alter, modular buildings may be disassembled and the modules relocated or refurbished for their next use reducing the requirement for raw materials and minimizing the amount of energy expended to create a building to fit the new need. Essentially, the entire building can be recycled in some cases.
Environmentally friendly construction process. The controlled environment of the factory allows for more accurate construction when permitting the extra materials to be recycled in house. 
Quality. Mixing traditional construction methods, 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 regulations and codes. On account of the requirement to transport modules to the last website, each module has to be constructed to independently withstand traveling and setup requirements. Thus the final module-to-module meeting of independently durable elements can yield a last product that is stronger than site-built structures. They also provide exceptional moist and cold resistance when compared to timber and other materials, and are immune to both compression decreasing and cold bridging.  Modular units might also be made to match in with external aesthetics of any present construction and modular units after constructed can be almost indistinguishable from a site-built construction.
Improved Air Quality - A lot of the indoor air quality issues identified in new structure result from high humidity levels from the farming materials. Since the modular structure is substantially completed in a factory-controlled setting using dry materials, the prospect of high levels of moisture being trapped in the new structure is removed.
Low waste. With the same plans being constantly built, the producer has records of exactly what amount of materials are necessary for a given 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 lengths in bulk. While waste from a site-built dwelling may typically fill several big dumpsters, building of a modular house creates much less waste. According to the UK group WRAPup to a 90% reduction in substances can be accomplished via the use of modular structure.
Indoor construction. Assembly is independent of weather, which may increase work efficiency and averts damaged building material.
Ability to support remote locations. Especially in countries in which prospective markets might be found far from industrial centers, such as Australia, there can be a lot higher costs to build a in-house property in a remote area or a place 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 an issue.
Modular construction allows for the building and the site work to be performed concurrently. According to some materials, this can reduce the total completion schedule by up to 50%. This also reduces labour, financing and oversight expenses. To save time and money, the majority of design and engineering disciplines are part of the production process. 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 structure, walls, floors, ceilings, and rafters are all built at precisely the same time, and then brought together in the exact same mill to form a construction. This procedure can enable modular construction times of half an conventional, stick-built structure.
Modular buildings are argued to have advantages over conventional buildings, for many different factors.