Born in Rome in 1933, Giancarlo Capolei obtained an architecture degree at La Sapienza University in Rome in 1960, and in the same year he registered with the Association of Professional Architects of Rome and its province. Later that year, he founded the studio 3C+t in Rome with his elder brother Arch. Francesco Cavalli and with Arch. Manlio Cavalli.
He began his teaching career as a volunteer assistant at the Institute of Urban Planning of the Faculty of Architecture – La Sapienza University, headed by Prof. Plinio Marconi, later by Prof. Luigi Piccinato and then by Prof. Gabriele Scimemi.
Contract researcher, assistant in charge and then professor at the Institute of Urban Planning, he held, since 1990, the courses in Urbanism 1 and 2, Urban Planning and Analysis of Urban Systems.
He took part with the University in congresses, conferences and studies in the field of urban planning, and produced essays and publications. He was also a member and President of Graduation Commissions and a member of State Examination Commissions until 2000.
He performed his duties as President of the Association of Professional Architects of Rome and its province from 1992 to 1994. As President of the Association, he was a member of the Senate and Chamber Commission gathered for the drafting of the New Public Contract Code 1994, and was summoned for hearings and reports at the Senate of the Republic within the framework of Legislative Decree 468 of 26.7.94 (building amnesty) regarding the state of implementation of Law No. 47/85 and the situation it affected – Senate Committee on Environment.