Commercial property, also called commercial real estate, investment property or income property, is real estate (buildings or land) intended to generate a profit, either from capital gains or rental income. Commercial property includes office buildings, medical centers, hotels, malls, retail stores, multifamily housing buildings, farm land, warehouses, and garages. In many states, residential property containing more than a certain number of units qualifies as commercial property for borrowing and tax purposes. Commercial buildings are buildings that are used for commercial purposes, and include office buildings, warehouses, and retail buildings (e.g. convenience stores, 'big box' stores, and shopping malls). In urban locations, a commercial building may combine functions, such as offices on levels 2–10, with retail on floor 1. When space allocated to multiple functions is significant, these buildings can be called multi-use. Local authorities commonly maintain strict regulations on commercial zoning, and have the authority to designate any zoned area as such; a business must be located in a commercial area or area zoned at least partially for commerce. Types of commercial property Commercial real estate is commonly divided into five categories: Office buildings – This category includes single-tenant properties, small professional office buildings, downtown skyscrapers, and everything in between. Retail Shops/Restaurants – This category includes pad sites on highway frontages, single tenant retail buildings, inline multi-tenant retail, small neighborhood shopping centers, larger community centers with grocery store anchor tenants, lifestyle centers that blend both indoor and outdoor shopping, "power centers" with large anchor stores such as Best Buy, PetSmart, OfficeMax, and Shopping Malls that usually house many indoor stores. Multifamily – This category includes apartment complexes or high-rise apartment buildings. Generally, anything larger than a fourplex is considered commercial real estate. Land – This category includes investment properties on undeveloped, raw, rural land in the path of future development. Or, infill land with an urban area, pad sites, and more. Industrial - This category includes warehouses, large R&D facilities, cold storage, and distribution centers. Miscellaneous – This catch all category would include any other nonresidential properties such as hotel, hospitality, medical, and self-storage developments, as well as many more. Of these, only the first five are classified as being commercial buildings. Residential income property may also signify multifamily apartments. Investment The basic elements of an investment are cash inflows, outflows, timing of cash flows, and risk. The ability to analyze these elements is key in providing services to investors