His utopian projects put emphasis on mobility instead of the immobility of real estate, focusing on using urban space in a more efficient and intensive manner.
In 1980, he created the Orban Planning Manifesto,[1] which for the first time, places emphasis on the responsibilities of architecture and building on a global scale.
Notable projects include: Proposal to use existing rockets to fire (nuclear) waste at the sun (1975), School of Perspective and the Station Europa Centraal (1988-1989), VIP City[2] (1999-2004).
In 2006, a new work called Urban Space insists on increasing population density without trying to define functions.
Deleu presented a steel chimney as a multifunctional structure (antenna installations).