Flexibility. An individual can continually add to a modular building, including producing high rises. When the needs alter, modular buildings can 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 building to meet the new demand. Essentially, the whole construction could be recycled in some instances.
Environmentally friendly construction process. Modular construction reduces waste and site disturbance compared to site-built structures. The controlled environment of the factory allows for more accurate construction while allowing the additional materials to be recycled in house. 
Modular construction allows for the construction and the site work to be completed simultaneously. According to some substances, this can reduce the overall completion schedule by as much as 50%. This also reduces labour, financing and supervision expenses. To save time and money, nearly all design and engineering areas are a part of the production process. Also unique to modular structure is the ability to simultaneously construct a building's floors, walls, ceilings, rafters, and roofs. During site-built structure, walls cannot be set until floors are in position, and ceilings and rafters can't be added till walls have been erected. On the flip side, with modular construction, walls, flooring, ceilings, and rafters are all constructed at the same time, and then brought together in precisely the same factory to form a building. This process can enable modular building times of half that of conventional, stick-built structure.
Improved Air Quality - Many of the indoor air quality problems identified in new structure result from elevated moisture levels in the framing materials. Since the modular structure is substantially completed in a factory-controlled setting utilizing dry materials, the prospect of high levels of moisture being trapped in the new structure is removed.
Quality. Mixing traditional construction methods, quality manufacturing and third-party agencies that provide random inspections, testing, and certification services for quality management, commercial modular buildings are built in strict accordance with appropriate local, state, and national regulations and codes. Due to the need to transport modules to the final website, each module has to be built to independently withstand traveling and setup prerequisites. Thus the final module-to-module meeting of independently durable elements can yield a final product which is more durable than site-built constructions. Modular buildings often use Structural Insulated Panels (SIPs) in construction, which provide a range of advantages over traditional construction materials. They're air-tight, and as such provide excellent thermal performance. They also provide exceptional damp and cold resistance when compared to timber and other substances, and are immune to both compression decreasing and cold bridging.  Modular units may also be made to fit in with external aesthetics of any existing construction and modular units after constructed can be almost indistinguishable from a site-built structure.
Ability to service remote locations. Especially in countries in which potential markets might be found far from industrial centers, such as Australia, there may be a lot higher costs to construct a in-house property in a remote area or a place experiencing a construction boom such as mining cities. Modular buildings can also be beneficial in providing sanitary and medical facilities where space, time, and funds are an issue.
Modular buildings have been argued to have advantages over conventional buildings, for many different reasons.
Indoor construction. Assembly is different from weather, which can boost work efficiency and avoids damaged construction material.
Low waste. With the same programs being constantly built, the producer has records of exactly what quantity of substances are necessary for a specified job. With the consistency, builders can design systems which use common lengths of lumber, wallboard, etc., cut things with maximum efficiency, or be able to order special spans in bulk. While squander from a site-built dwelling may typically fill several large dumpsters, construction of a modular house creates much less waste. According to the UK group WRAPup to a 90% reduction in materials can be accomplished through the use of modular structure. Materials minimized contain: wood pallets, shrink wrap, cardboard, plasterboard, wood, concrete, bricks, and cement.
Modular construction may also provide an edge in similar classes from the International Green Construction Code.