Mobile home in the context of "Census"

A residential area is a land used in which housing predominates, as opposed to industrial and commercial areas.

Housing may vary significantly between, and through, residential areas. These include single-family housing, multi-family residential, or mobile homes. Zoning for residential use may permit some services or work opportunities or may totally exclude business and industry. It may permit high density land use or only permit low density uses. Residential zoning usually includes a smaller FAR (floor area ratio) than business, commercial or industrial/manufacturing zoning. The area may be large or small.

In law, a dwelling (also known as a residence, abode or domicile) is a self-contained unit of accommodation – such as a house, apartment, mobile home, houseboat, recreational vehicle, or other "substantial" structure – used as a home by one or more households. The concept of a dwelling has significance in relation to search and seizure, conveyancing of real property, burglary, trespass, and land-use planning.

A jack is a mechanical lifting device used to apply great forces or lift heavy loads. A mechanical jack employs a screw thread for lifting heavy equipment. A hydraulic jack uses hydraulic power. The most common form is a car jack, floor jack or garage jack, which lifts vehicles so that maintenance can be performed. Jacks are usually rated for a maximum lifting capacity (for example, 1.5 tons or 3 tons). Industrial jacks can be rated for many tons of load.

A trailer is an unpowered vehicle towed by a powered vehicle. It is commonly used for the transport of goods and materials. There are two general categories of trailers: the full trailer and the semitrailer. A full trailer is a type of trailer whose entire weight is supported by its own wheels, with no weight transferred to the towing vehicle. In contrast, a semi-trailer is designed so that a portion of its weight is carried by its own wheels, while the remaining weight is borne by the towing vehicle.

Sometimes recreational vehicles, travel trailers, or mobile homes with limited living facilities where people can camp or stay have been referred to as trailers. In earlier days, many such vehicles were towable trailers.

In the United States, rent control refers to laws or ordinances that set price controls on the rent of residential housing to function as a price ceiling. More loosely, "rent control" describes several types of price control:

• "strict price ceilings", also known as "rent freeze" systems, or "absolute" or "first generation" rent controls, in which no increases in rent are allowed at all (rent is typically frozen at the rate existing when the law was enacted);
• "vacancy control", also known as "strict" or "strong" rent control, in which the rental price can rise but continues to be regulated in between tenancies (a new tenant pays almost the same rent as the previous tenant); and
• "vacancy decontrol", also known as "tenancy" or "second-generation" rent control, which limits price increases during a tenancy but allows rents to rise to market rate between tenancies (new tenants pay market rate rent but increases are limited as long as they remain).

As of 2022, seven states (California, New York, New Jersey, Maryland, Maine, Oregon, and Minnesota) and the District of Columbia have localities in which some form of residential rent control is in effect (for normal structures, excluding mobile homes). Thirty-seven states either prohibit or preempt rent control, while seven states allow their cities to enact rent control but have no cities that have implemented it.