In a built to suit lease, a developer builds a property specifically for the use of one tenant. Generally, a tenant will locate a developer who is willing to purchase or ground lease land (or already owns land), and is willing to engage in a built-to-suit transaction.
In commercial real estate, infill is defined as the development of unused land in urban areas. This commonly takes the form of developing an empty lot of land between two buildings, but can also involve the demolition of older or underused properties. Supporters of infill development believe that it makes efficient use of existing land and reduces burdens on municipal services, due to the fact the area is already being served by water, power, and communications infrastructure.