Within a urban area there is a tendency for land uses to aggregate. A residential area is a land use in which the predominant use is housing. Housing may vary significantly between, and through, residential areas. These include single family housing, multiple family housing such as (apartments, duplexes, townhomes (or similar configurations), condominiums) 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 to area ratio) than business, commercial or industrial/manufacturing zoning.The area may also be large or small.
In certain residential areas, largely rural, quite large tracts of land may exist which have no services whatsoever. Because a large distance must be traveled to access the nearest services, most journeys involve using a motor vehicle or some other form of transport. This need has resulted in Residential land development usually existing or planned infrastructure such as rail and road. The pattern of development is usually set forth in the restrictive covenants contained in the deeds to the properties in the development, but may also result from or be reinforced by zoning. Restrictive covenants are not easily changed as the agreement of all property owners (many of whom may not live in the area) may need to be obtained to effect a change. The area may also be large or small.