National
International
European

CET is inserted in an informal network of national and international research institutions with who develops projects of enlarged cooperation, through joint research and seminars and other inter-centre activities.

• LNEC - Laboratório de Engenharia Civil
• CESIS - Centro de Estudos para a Intervenção Social
• ISEG - Instituto Superior de Economia e Gestão
• CNIG - Centro Nacional de Informação Geográfica
• CEDR - Centro de Estudos de Desenvolvimento Regional, Universidade da Beira Interior
• IRIC – Laboratório de Estudos do Território, Universidade do Porto

• IPRAUS – Institut Parisien de Recherche Architecture, Urbanisme, Sociologie
• IUAV – Istituto Universitario di Architettura di Venezia, Venezia, Itália
• SBi –Danish Building Research Institute, Hoersholm, Dinamarca
• ILS – Institut für Landes- und Stadtentwicklungsforschung, Dortmund, Alemanha
• University of Thessaly, Volos, Grécia
• SERC – Social Ecological Research and Consultancy, Amsterdam, Holanda
• National University of Ireland, Maynooth, Irlanda
• University of Westminster, London, Reino Unido
• University of Newcastle Upon Tyne, Newcastle Upon Tyne, Reino Unido  
• Grupo de Estudios Poblácion y Sociedad – Universidade Compultense de Madrid
• NIBR – Norwegian Institute for Urban and Regional Research

CET is a member of several relevant European networks and organizations, being the more significants:

• ENHR – European Network for Housing Research
• Réseau Socio-Economie de l´Habitat
• OIDP – Observatori Internacional de la Democràcia Participativa

CET is also registered at Bureaux d´Etudes et de Conseils of the European Commission - (DG XII).