The airport is built as one large terminal (a single-terminal concept), split into three large departure halls, which connect again once airside. The most recent of these was completed in 1994, and expanded in 2007 with a new section, called Terminal 4, although it is not considered a separate building. Plans for further terminal expansion exist, including the construction of a separate new terminal between the Zwanenburgbaan and Polderbaan runways that would end the one-terminal concept