In general, local building codes do not apply to manufactured homes but are regulated by federal law.
Manufactured homes are built entirely in a protected environment under a federal code set by the US Department of Housing and Urban Development (HUD). It is this national regulation that has allowed many manufacturers to distribute homes nationwide, since they do not fall under the jursdiction of local building authorities. However, there are snow load and wind zones that were adopted by HUD that manufactured home builders must now follow. These newer standards for manufactured homes have greatly increased their durability.