Residential properties are homes or apartments. These might be single-family houses, townhouses, studios, etc. Most people who invest in residential property but don't live in it themselves will rent it out to others, so they can generate income from the property.
In the same way that an “industrial area” is a place of industry where people work, a residential area is made up of houses and apartment buildings — places where people reside. Residential is an adjective that expresses a relationship with homes, apartments, or any place where people live. Types of residential buildings include apartments, condominiums, co-ops, farmhouses, hostels, lodging houses, single- or multi-family homes, townhouses, and more. Residential density measures residential development on a specific site or within a residential land area.