Some US courts have ruled that zoning restrictions applicable to mobile homes do not apply to modular homes. Some Modular homes are built to the International Building Code which equals or exceeds US Codes. Additionally, in the US, the Uniform Standards of Professional Appraisal Practice allow site-built homes to be used as comparables for modular homes in real estate appraisal; thus, modular homes can, in some cities and counties (depending on local ordinances) be evaluated the same way as traditionally-built dwellings of similar quality. Possible developments in equivalence between modular and site-built housing types for the purposes of real estate appraisals, financing and zoning, may increase the sales of modular homes over time.
[Citation: http://en.wikipedia.org/wiki/Modular_home]