They adhere to the same state and local building codes as do traditional housing. According to Automated Builder magazine, more than 50 percent of all homes are constructed in whole or in part by using building systems. Using building systems can reduce expenses and construction time. The average time it takes to complete a systems built home is 4 to 8 weeks. Most building systems manufacturers use computers to create customized plans to meet the design and budget needs for both affordable and high-end luxury home buyers.
Manufacturers can usually construct a systems built home from standard blueprints.
In 1996, approximately 37,000 modular homes and 110,000 panelized units were produced. All types have seen a steady increase in recent years, and continued growth is predicted. Modules are 90-95 percent complete when they are shipped from the factory to the building site to be affixed to a conventional foundation. Open wall panels are wall sections containing exterior sheathing only. Plumbing, wiring, insulation, and interior sheathing are installed at the building site.