Factory-built housing that is ordinarily 85 to 95 percent complete when the unit leaves the factory. Modular homes usually consist of two or three 3-dimensional boxes that are shipped complete (or nearly complete) from the factory and are connected together on the site. Units may be single or double sections. Modular homes are required to conform to state regulations and local building codes that are in effect where the unit will be located. The advantage of modular homes is reduced construction time on the site and lower costs than conventional homes.
Factory-built housing that is composed of prefabricated panels built in a factory. The panels contain whole walls including interior wiring and exterior siding. State regulations and local building codes that are in effect where the unit will be located govern construction. The advantage of panelized homes is the quality control provided by factory assembly and faster completion time of the unit.
Factory-built housing that is constructed on-site from materials cut-to-fit and finished in a factory. Pre-Cut homes include kit, log and dome homes. these units are required to conform to state regulations and local building codes. the advantage of the pre-cut home is the quality provided by factory assembly and faster completion time of the unit.
The term mobile home used for homes built prior to June 15, 1976, when the Federal Manufactured Home Construction and Saftey Standards (HUD code) went into effect. Voluntary standards were previously in effect.
Factory-built housing that is 98 percent complete when transported to the home site. Housing units are produced in single and multi-section homes. On average, it take 108 hours to build a single manufactured home. Manufactured homes are required to comply with the HUD Code which became effective June 15, 1976, and has been upgraded numerous times. Manufactured houses are pre-empted from following state regulations and local building codes because of the chassis substructure that enables transportation and allows interstate travel.
In contrast to state regulations and local building codes, which typically prescribe material systems for certain construction types, the HUD Code is performance based and provides standards for design and construction, strength and transportability, fire resistance, energy efficiency and quality for conformance. No manufactured home may be shipped from the factory unless it complies with the HUD Code and is released for shipment by an independent third-party inspector certified by HUD.
Of all factory-built housing, 66 percent is manufactured housing.