After he left Italy, he worked for a period for Archigram in London, for Henning Larsen and for Jørn Utzon in Copenhagen.

He received his degree in architecture from the La Sapienza University in 1969 in Rome,[2] where he opened his first office in 1967, the GRANMA, collaborating with his first-wife Anna Maria Sacconi.

From 1985 he has worked in partnership with his second wife, Doriana Mandrelli, who graduated in architecture in Paris in 2007.

For many years he has dedicated his special attention to the study of urban problems and in particular to the suburbs.

Since January 2000, he writes the architecture column of the weekly publication L'Espresso, established by Bruno Zevi.