Modular construction allows for the building and the site work to be completed concurrently. According to some materials, this can decrease the total completion schedule by as much as 50%. This also reduces labour, financing and oversight costs. To save time and money, the majority of engineering and design areas are part of the manufacturing procedure. Also unique to modular structure is the ability to simultaneously construct a building's floors, ceilings, walls, rafters, and roofs. During site-built construction, walls can't be placed until flooring are set up, and ceilings and rafters can't be added till walls have been erected. On the other hand, with modular structure, walls, flooring, ceilings, and rafters are all built at the same time, and then brought together at precisely the exact same mill to form a construction. This process can allow modular building times of half an traditional, stick-built structure.
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, builders can design systems that use common lengths of lumber, wallboard, etc.. cut things with maximum efficacy, or have the ability to order exceptional lengths in bulk. While squander 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% decrease in materials can be achieved through the use of modular construction. Materials minimized include: timber pallets, shrink wrap, cardboard, plasterboard, wood, concrete, bricks, and cement.
Quality. Mixing traditional construction techniques, quality manufacturing and third party agencies who offer random inspections, testing, and certification services for quality management, commercial modular structures are built in strict compliance with appropriate local, state, and national regulations and codes. Due to the requirement to transport modules to the last site, each module has to be built to independently withstand traveling and installation prerequisites. Thus the closing module-to-module assembly of independently durable components can yield a last product that is more durable than site-built constructions. Modular buildings often utilize Structural Insulated Panels (SIPs) in construction, which offer a range of advantages over traditional building materials. They also provide superior damp and cold immunity when compared to timber and other materials, and are resistant to both compression shrinking and cold bridging.  Modular units might also be made to match in with outside aesthetics of any present building and modular units after assembled can be almost indistinguishable from a site-built structure.
Ability to service remote locations. Particularly in countries in which potential markets may 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 construction boom such as mining towns. Modular buildings can also be beneficial in providing medical and sanitary facilities where time, space, and funds are an issue.
Improved Air Quality - Many of the indoor air quality problems identified in new structure result from elevated moisture levels in the farming materials. Because the modular construction is substantially completed in a factory-controlled setting using abrasive materials, the prospect of elevated levels of moisture being trapped in the new construction is eliminated.
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. 
Flexibility. An individual can add to a modular building, such as creating high rises. When the demands change, modular buildings may be disassembled and the modules emptied or refurbished to their next use reducing the requirement for raw materials and minimizing the total amount of energy expended to create a construction to fit the new need. In essence, the whole building can be recycled in some cases.
Modular buildings are argued to have benefits over conventional buildings, for a variety of factors.
Indoor construction. Construction is different from weather, which may boost work efficiency and avoids damaged construction material.
Modular construction may also give an advantage in similar categories from the International Green Construction Code.