Modular construction consists of many modular subassemblies built and assembled in an environmentally controlled factory that are assembled into a larger component, or module. That module is then shipped to a building site, combined with other modules, and assembled into a finished product.
Today there is a major labor shortage in the building industry. Quality labor is just hard to find.
The best subcontractors that are out there, because of supply and demand, are raising their prices thereby increasing the cost of new home construction. Using the modular building system allows a builder to control his costs by having much of the home built in the factory. The plumbing, electrical, mechanical, and many of the interior/exterior finishes are completed in a factory. This reduces the need for dependence on expensive onsite labor.
Most homes built using modular construction are delivered to the site 75-85% complete. The impacts of weather as a factor in home construction is virtually eliminated. By keeping rain and moisture out of the home during construction, a healthy living environment is promoted by keeping floors and walls dry during construction, unlike with traditional site built homes. This reduces the risk of mold and mildew growth.