The State Housing Code shall apply to existing residential structures used for human habitation. The provisions are designed to eliminate or prevent substandard conditions with respect to structures, protect against fire hazards, provide for adequate space for light and air, provide for proper heating and ventilating and eliminate unsanitary conditions and overcrowding. Every portion of a building or premises used or intended to be used for residential purposes shall comply with this chapter, except hotels and motels serving transient guests only, migratory labor housing, rest homes, convalescent homes, nursing homes, recreational campers and civil defense shelters. For the purpose of this chapter, regulations by the State Department of Health and Social Services for Migratory Labor Camps will apply to migrant housing.